| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Namjae Jeon | 40717 | 93.89% | 157 | 59.92% |
| Hyeoncheol Lee | 1169 | 2.70% | 20 | 7.63% |
| Marios Makassikis | 653 | 1.51% | 15 | 5.73% |
| Christian Brauner | 132 | 0.30% | 14 | 5.34% |
| Kuan-Ting Chen | 122 | 0.28% | 2 | 0.76% |
| Jeff Layton | 82 | 0.19% | 5 | 1.91% |
| Sebastian Gottschall | 80 | 0.18% | 1 | 0.38% |
| David Disseldorp | 47 | 0.11% | 4 | 1.53% |
| Hobin Woo | 44 | 0.10% | 1 | 0.38% |
| Ronnie Sahlberg | 42 | 0.10% | 4 | 1.53% |
| Hangyu Hua | 39 | 0.09% | 1 | 0.38% |
| Marcos Del Sol Vives | 38 | 0.09% | 1 | 0.38% |
| Dawei Li | 28 | 0.06% | 1 | 0.38% |
| ChenXiaoSong | 20 | 0.05% | 4 | 1.53% |
| Al Viro | 19 | 0.04% | 4 | 1.53% |
| ZhangXiaoxu | 19 | 0.04% | 1 | 0.38% |
| Chih-Yen Chang | 15 | 0.03% | 2 | 0.76% |
| Ralph Boehme | 14 | 0.03% | 1 | 0.38% |
| Fedor Pchelkin | 14 | 0.03% | 1 | 0.38% |
| luosili | 12 | 0.03% | 1 | 0.38% |
| Jakob Koschel | 9 | 0.02% | 1 | 0.38% |
| Christophe Jaillet | 9 | 0.02% | 2 | 0.76% |
| Atte Heikkilä | 8 | 0.02% | 2 | 0.76% |
| Dan Carpenter | 6 | 0.01% | 2 | 0.76% |
| Zizhi Wo | 5 | 0.01% | 1 | 0.38% |
| Colin Ian King | 5 | 0.01% | 2 | 0.76% |
| Li Yang | 4 | 0.01% | 4 | 1.53% |
| Per Forlin | 3 | 0.01% | 1 | 0.38% |
| Steve French | 3 | 0.01% | 1 | 0.38% |
| kbuild test robot | 3 | 0.01% | 2 | 0.76% |
| Muhammad Usama Anjum | 2 | 0.00% | 1 | 0.38% |
| Amir Goldstein | 1 | 0.00% | 1 | 0.38% |
| Wan Jiabing | 1 | 0.00% | 1 | 0.38% |
| Stephen Rothwell | 1 | 0.00% | 1 | 0.38% |
| Total | 43366 | 262 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org> * Copyright (C) 2018 Samsung Electronics Co., Ltd. */ #include <linux/inetdevice.h> #include <net/addrconf.h> #include <linux/syscalls.h> #include <linux/namei.h> #include <linux/statfs.h> #include <linux/ethtool.h> #include <linux/falloc.h> #include <linux/mount.h> #include <linux/filelock.h> #include "glob.h" #include "smbfsctl.h" #include "oplock.h" #include "smbacl.h" #include "auth.h" #include "asn1.h" #include "connection.h" #include "transport_ipc.h" #include "transport_rdma.h" #include "vfs.h" #include "vfs_cache.h" #include "misc.h" #include "server.h" #include "smb_common.h" #include "smbstatus.h" #include "ksmbd_work.h" #include "mgmt/user_config.h" #include "mgmt/share_config.h" #include "mgmt/tree_connect.h" #include "mgmt/user_session.h" #include "mgmt/ksmbd_ida.h" #include "ndr.h" static void __wbuf(struct ksmbd_work *work, void **req, void **rsp) { if (work->next_smb2_rcv_hdr_off) { *req = ksmbd_req_buf_next(work); *rsp = ksmbd_resp_buf_next(work); } else { *req = smb2_get_msg(work->request_buf); *rsp = smb2_get_msg(work->response_buf); } } #define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs)) /** * check_session_id() - check for valid session id in smb header * @conn: connection instance * @id: session id from smb header * * Return: 1 if valid session id, otherwise 0 */ static inline bool check_session_id(struct ksmbd_conn *conn, u64 id) { struct ksmbd_session *sess; if (id == 0 || id == -1) return false; sess = ksmbd_session_lookup_all(conn, id); if (sess) return true; pr_err("Invalid user session id: %llu\n", id); return false; } struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn) { return xa_load(&sess->ksmbd_chann_list, (long)conn); } /** * smb2_get_ksmbd_tcon() - get tree connection information using a tree id. * @work: smb work * * Return: 0 if there is a tree connection matched or these are * skipable commands, otherwise error */ int smb2_get_ksmbd_tcon(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); unsigned int cmd = le16_to_cpu(req_hdr->Command); unsigned int tree_id; if (cmd == SMB2_TREE_CONNECT_HE || cmd == SMB2_CANCEL_HE || cmd == SMB2_LOGOFF_HE) { ksmbd_debug(SMB, "skip to check tree connect request\n"); return 0; } if (xa_empty(&work->sess->tree_conns)) { ksmbd_debug(SMB, "NO tree connected\n"); return -ENOENT; } tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId); /* * If request is not the first in Compound request, * Just validate tree id in header with work->tcon->id. */ if (work->next_smb2_rcv_hdr_off) { if (!work->tcon) { pr_err("The first operation in the compound does not have tcon\n"); return -EINVAL; } if (tree_id != UINT_MAX && work->tcon->id != tree_id) { pr_err("tree id(%u) is different with id(%u) in first operation\n", tree_id, work->tcon->id); return -EINVAL; } return 1; } work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id); if (!work->tcon) { pr_err("Invalid tid %d\n", tree_id); return -ENOENT; } return 1; } /** * smb2_set_err_rsp() - set error response code on smb response * @work: smb work containing response buffer */ void smb2_set_err_rsp(struct ksmbd_work *work) { struct smb2_err_rsp *err_rsp; if (work->next_smb2_rcv_hdr_off) err_rsp = ksmbd_resp_buf_next(work); else err_rsp = smb2_get_msg(work->response_buf); if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) { int err; err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE; err_rsp->ErrorContextCount = 0; err_rsp->Reserved = 0; err_rsp->ByteCount = 0; err_rsp->ErrorData[0] = 0; err = ksmbd_iov_pin_rsp(work, (void *)err_rsp, __SMB2_HEADER_STRUCTURE_SIZE + SMB2_ERROR_STRUCTURE_SIZE2); if (err) work->send_no_response = 1; } } /** * is_smb2_neg_cmd() - is it smb2 negotiation command * @work: smb work containing smb header * * Return: true if smb2 negotiation command, otherwise false */ bool is_smb2_neg_cmd(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); /* is it SMB2 header ? */ if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; /* make sure it is request not response message */ if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR) return false; if (hdr->Command != SMB2_NEGOTIATE) return false; return true; } /** * is_smb2_rsp() - is it smb2 response * @work: smb work containing smb response buffer * * Return: true if smb2 response, otherwise false */ bool is_smb2_rsp(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb2_get_msg(work->response_buf); /* is it SMB2 header ? */ if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; /* make sure it is response not request message */ if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)) return false; return true; } /** * get_smb2_cmd_val() - get smb command code from smb header * @work: smb work containing smb request buffer * * Return: smb2 request command value */ u16 get_smb2_cmd_val(struct ksmbd_work *work) { struct smb2_hdr *rcv_hdr; if (work->next_smb2_rcv_hdr_off) rcv_hdr = ksmbd_req_buf_next(work); else rcv_hdr = smb2_get_msg(work->request_buf); return le16_to_cpu(rcv_hdr->Command); } /** * set_smb2_rsp_status() - set error response code on smb2 header * @work: smb work containing response buffer * @err: error response code */ void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err) { struct smb2_hdr *rsp_hdr; rsp_hdr = smb2_get_msg(work->response_buf); rsp_hdr->Status = err; work->iov_idx = 0; work->iov_cnt = 0; work->next_smb2_rcv_hdr_off = 0; smb2_set_err_rsp(work); } /** * init_smb2_neg_rsp() - initialize smb2 response for negotiate command * @work: smb work containing smb request buffer * * smb2 negotiate response is sent in reply of smb1 negotiate command for * dialect auto-negotiation. */ int init_smb2_neg_rsp(struct ksmbd_work *work) { struct smb2_hdr *rsp_hdr; struct smb2_negotiate_rsp *rsp; struct ksmbd_conn *conn = work->conn; int err; rsp_hdr = smb2_get_msg(work->response_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->CreditRequest = cpu_to_le16(2); rsp_hdr->Command = SMB2_NEGOTIATE; rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = 0; rsp_hdr->Id.SyncId.ProcessId = 0; rsp_hdr->Id.SyncId.TreeId = 0; rsp_hdr->SessionId = 0; memset(rsp_hdr->Signature, 0, 16); rsp = smb2_get_msg(work->response_buf); WARN_ON(ksmbd_conn_good(conn)); rsp->StructureSize = cpu_to_le16(65); ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect); rsp->DialectRevision = cpu_to_le16(conn->dialect); /* Not setting conn guid rsp->ServerGUID, as it * not used by client for identifying connection */ rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); /* Default Max Message Size till SMB2.0, 64K*/ rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); rsp->SystemTime = cpu_to_le64(ksmbd_systime()); rsp->ServerStartTime = 0; rsp->SecurityBufferOffset = cpu_to_le16(128); rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + le16_to_cpu(rsp->SecurityBufferOffset)); rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH); if (err) return err; conn->use_spnego = true; ksmbd_conn_set_need_negotiate(conn); return 0; } /** * smb2_set_rsp_credits() - set number of credits in response buffer * @work: smb work containing smb response buffer */ int smb2_set_rsp_credits(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); struct smb2_hdr *hdr = ksmbd_resp_buf_next(work); struct ksmbd_conn *conn = work->conn; unsigned short credits_requested, aux_max; unsigned short credit_charge, credits_granted = 0; if (work->send_no_response) return 0; hdr->CreditCharge = req_hdr->CreditCharge; if (conn->total_credits > conn->vals->max_credits) { hdr->CreditRequest = 0; pr_err("Total credits overflow: %d\n", conn->total_credits); return -EINVAL; } credit_charge = max_t(unsigned short, le16_to_cpu(req_hdr->CreditCharge), 1); if (credit_charge > conn->total_credits) { ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n", credit_charge, conn->total_credits); return -EINVAL; } conn->total_credits -= credit_charge; conn->outstanding_credits -= credit_charge; credits_requested = max_t(unsigned short, le16_to_cpu(req_hdr->CreditRequest), 1); /* according to smb2.credits smbtorture, Windows server * 2016 or later grant up to 8192 credits at once. * * TODO: Need to adjuct CreditRequest value according to * current cpu load */ if (hdr->Command == SMB2_NEGOTIATE) aux_max = 1; else aux_max = conn->vals->max_credits - conn->total_credits; credits_granted = min_t(unsigned short, credits_requested, aux_max); conn->total_credits += credits_granted; work->credits_granted += credits_granted; if (!req_hdr->NextCommand) { /* Update CreditRequest in last request */ hdr->CreditRequest = cpu_to_le16(work->credits_granted); } ksmbd_debug(SMB, "credits: requested[%d] granted[%d] total_granted[%d]\n", credits_requested, credits_granted, conn->total_credits); return 0; } /** * init_chained_smb2_rsp() - initialize smb2 chained response * @work: smb work containing smb response buffer */ static void init_chained_smb2_rsp(struct ksmbd_work *work) { struct smb2_hdr *req = ksmbd_req_buf_next(work); struct smb2_hdr *rsp = ksmbd_resp_buf_next(work); struct smb2_hdr *rsp_hdr; struct smb2_hdr *rcv_hdr; int next_hdr_offset = 0; int len, new_len; /* Len of this response = updated RFC len - offset of previous cmd * in the compound rsp */ /* Storing the current local FID which may be needed by subsequent * command in the compound request */ if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) { work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId; work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId; work->compound_sid = le64_to_cpu(rsp->SessionId); } len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off; next_hdr_offset = le32_to_cpu(req->NextCommand); new_len = ALIGN(len, 8); work->iov[work->iov_idx].iov_len += (new_len - len); inc_rfc1001_len(work->response_buf, new_len - len); rsp->NextCommand = cpu_to_le32(new_len); work->next_smb2_rcv_hdr_off += next_hdr_offset; work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; work->next_smb2_rsp_hdr_off += new_len; ksmbd_debug(SMB, "Compound req new_len = %d rcv off = %d rsp off = %d\n", new_len, work->next_smb2_rcv_hdr_off, work->next_smb2_rsp_hdr_off); rsp_hdr = ksmbd_resp_buf_next(work); rcv_hdr = ksmbd_req_buf_next(work); if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { ksmbd_debug(SMB, "related flag should be set\n"); work->compound_fid = KSMBD_NO_FID; work->compound_pfid = KSMBD_NO_FID; } memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->Command = rcv_hdr->Command; /* * Message is response. We don't grant oplock yet. */ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR | SMB2_FLAGS_RELATED_OPERATIONS); rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = rcv_hdr->MessageId; rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; rsp_hdr->SessionId = rcv_hdr->SessionId; memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); } /** * is_chained_smb2_message() - check for chained command * @work: smb work containing smb request buffer * * Return: true if chained request, otherwise false */ bool is_chained_smb2_message(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); unsigned int len, next_cmd; if (hdr->ProtocolId != SMB2_PROTO_NUMBER) return false; hdr = ksmbd_req_buf_next(work); next_cmd = le32_to_cpu(hdr->NextCommand); if (next_cmd > 0) { if ((u64)work->next_smb2_rcv_hdr_off + next_cmd + __SMB2_HEADER_STRUCTURE_SIZE > get_rfc1002_len(work->request_buf)) { pr_err("next command(%u) offset exceeds smb msg size\n", next_cmd); return false; } if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE > work->response_sz) { pr_err("next response offset exceeds response buffer size\n"); return false; } ksmbd_debug(SMB, "got SMB2 chained command\n"); init_chained_smb2_rsp(work); return true; } else if (work->next_smb2_rcv_hdr_off) { /* * This is last request in chained command, * align response to 8 byte */ len = ALIGN(get_rfc1002_len(work->response_buf), 8); len = len - get_rfc1002_len(work->response_buf); if (len) { ksmbd_debug(SMB, "padding len %u\n", len); work->iov[work->iov_idx].iov_len += len; inc_rfc1001_len(work->response_buf, len); } work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off; } return false; } /** * init_smb2_rsp_hdr() - initialize smb2 response * @work: smb work containing smb request buffer * * Return: 0 */ int init_smb2_rsp_hdr(struct ksmbd_work *work) { struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf); struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf); memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2); rsp_hdr->ProtocolId = rcv_hdr->ProtocolId; rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE; rsp_hdr->Command = rcv_hdr->Command; /* * Message is response. We don't grant oplock yet. */ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR); rsp_hdr->NextCommand = 0; rsp_hdr->MessageId = rcv_hdr->MessageId; rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId; rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId; rsp_hdr->SessionId = rcv_hdr->SessionId; memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16); return 0; } /** * smb2_allocate_rsp_buf() - allocate smb2 response buffer * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_allocate_rsp_buf(struct ksmbd_work *work) { struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE; size_t large_sz = small_sz + work->conn->vals->max_trans_size; size_t sz = small_sz; int cmd = le16_to_cpu(hdr->Command); if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE) sz = large_sz; if (cmd == SMB2_QUERY_INFO_HE) { struct smb2_query_info_req *req; if (get_rfc1002_len(work->request_buf) < offsetof(struct smb2_query_info_req, OutputBufferLength)) return -EINVAL; req = smb2_get_msg(work->request_buf); if ((req->InfoType == SMB2_O_INFO_FILE && (req->FileInfoClass == FILE_FULL_EA_INFORMATION || req->FileInfoClass == FILE_ALL_INFORMATION)) || req->InfoType == SMB2_O_INFO_SECURITY) sz = large_sz; } /* allocate large response buf for chained commands */ if (le32_to_cpu(hdr->NextCommand) > 0) sz = large_sz; work->response_buf = kvzalloc(sz, GFP_KERNEL); if (!work->response_buf) return -ENOMEM; work->response_sz = sz; return 0; } /** * smb2_check_user_session() - check for valid session for a user * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_check_user_session(struct ksmbd_work *work) { struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work); struct ksmbd_conn *conn = work->conn; unsigned int cmd = le16_to_cpu(req_hdr->Command); unsigned long long sess_id; /* * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not * require a session id, so no need to validate user session's for * these commands. */ if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE || cmd == SMB2_SESSION_SETUP_HE) return 0; if (!ksmbd_conn_good(conn)) return -EIO; sess_id = le64_to_cpu(req_hdr->SessionId); /* * If request is not the first in Compound request, * Just validate session id in header with work->sess->id. */ if (work->next_smb2_rcv_hdr_off) { if (!work->sess) { pr_err("The first operation in the compound does not have sess\n"); return -EINVAL; } if (sess_id != ULLONG_MAX && work->sess->id != sess_id) { pr_err("session id(%llu) is different with the first operation(%lld)\n", sess_id, work->sess->id); return -EINVAL; } return 1; } /* Check for validity of user session */ work->sess = ksmbd_session_lookup_all(conn, sess_id); if (work->sess) return 1; ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id); return -ENOENT; } /** * smb2_get_name() - get filename string from on the wire smb format * @src: source buffer * @maxlen: maxlen of source string * @local_nls: nls_table pointer * * Return: matching converted filename on success, otherwise error ptr */ static char * smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls) { char *name; name = smb_strndup_from_utf16(src, maxlen, 1, local_nls); if (IS_ERR(name)) { pr_err("failed to get name %ld\n", PTR_ERR(name)); return name; } if (*name == '\\') { pr_err("not allow directory name included leading slash\n"); kfree(name); return ERR_PTR(-EINVAL); } ksmbd_conv_path_to_unix(name); ksmbd_strip_last_slash(name); return name; } int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg) { struct ksmbd_conn *conn = work->conn; int id; id = ksmbd_acquire_async_msg_id(&conn->async_ida); if (id < 0) { pr_err("Failed to alloc async message id\n"); return id; } work->asynchronous = true; work->async_id = id; ksmbd_debug(SMB, "Send interim Response to inform async request id : %d\n", work->async_id); work->cancel_fn = fn; work->cancel_argv = arg; if (list_empty(&work->async_request_entry)) { spin_lock(&conn->request_lock); list_add_tail(&work->async_request_entry, &conn->async_requests); spin_unlock(&conn->request_lock); } return 0; } void release_async_work(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; spin_lock(&conn->request_lock); list_del_init(&work->async_request_entry); spin_unlock(&conn->request_lock); work->asynchronous = 0; work->cancel_fn = NULL; kfree(work->cancel_argv); work->cancel_argv = NULL; if (work->async_id) { ksmbd_release_id(&conn->async_ida, work->async_id); work->async_id = 0; } } void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status) { struct smb2_hdr *rsp_hdr; struct ksmbd_work *in_work = ksmbd_alloc_work_struct(); if (allocate_interim_rsp_buf(in_work)) { pr_err("smb_allocate_rsp_buf failed!\n"); ksmbd_free_work_struct(in_work); return; } in_work->conn = work->conn; memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work), __SMB2_HEADER_STRUCTURE_SIZE); rsp_hdr = smb2_get_msg(in_work->response_buf); rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND; rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id); smb2_set_err_rsp(in_work); rsp_hdr->Status = status; ksmbd_conn_write(in_work); ksmbd_free_work_struct(in_work); } static __le32 smb2_get_reparse_tag_special_file(umode_t mode) { if (S_ISDIR(mode) || S_ISREG(mode)) return 0; if (S_ISLNK(mode)) return IO_REPARSE_TAG_LX_SYMLINK_LE; else if (S_ISFIFO(mode)) return IO_REPARSE_TAG_LX_FIFO_LE; else if (S_ISSOCK(mode)) return IO_REPARSE_TAG_AF_UNIX_LE; else if (S_ISCHR(mode)) return IO_REPARSE_TAG_LX_CHR_LE; else if (S_ISBLK(mode)) return IO_REPARSE_TAG_LX_BLK_LE; return 0; } /** * smb2_get_dos_mode() - get file mode in dos format from unix mode * @stat: kstat containing file mode * @attribute: attribute flags * * Return: converted dos mode */ static int smb2_get_dos_mode(struct kstat *stat, int attribute) { int attr = 0; if (S_ISDIR(stat->mode)) { attr = FILE_ATTRIBUTE_DIRECTORY | (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM)); } else { attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE; attr &= ~(FILE_ATTRIBUTE_DIRECTORY); if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps & FILE_SUPPORTS_SPARSE_FILES)) attr |= FILE_ATTRIBUTE_SPARSE_FILE; if (smb2_get_reparse_tag_special_file(stat->mode)) attr |= FILE_ATTRIBUTE_REPARSE_POINT; } return attr; } static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt, __le16 hash_id) { pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16(38); pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE); get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE); pneg_ctxt->HashAlgorithms = hash_id; } static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt, __le16 cipher_type) { pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16(4); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->CipherCount = cpu_to_le16(1); pneg_ctxt->Ciphers[0] = cipher_type; } static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt, __le16 sign_algo) { pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES; pneg_ctxt->DataLength = cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2) - sizeof(struct smb2_neg_context)); pneg_ctxt->Reserved = cpu_to_le32(0); pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1); pneg_ctxt->SigningAlgorithms[0] = sign_algo; } static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt) { pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE; pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN); /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */ pneg_ctxt->Name[0] = 0x93; pneg_ctxt->Name[1] = 0xAD; pneg_ctxt->Name[2] = 0x25; pneg_ctxt->Name[3] = 0x50; pneg_ctxt->Name[4] = 0x9C; pneg_ctxt->Name[5] = 0xB4; pneg_ctxt->Name[6] = 0x11; pneg_ctxt->Name[7] = 0xE7; pneg_ctxt->Name[8] = 0xB4; pneg_ctxt->Name[9] = 0x23; pneg_ctxt->Name[10] = 0x83; pneg_ctxt->Name[11] = 0xDE; pneg_ctxt->Name[12] = 0x96; pneg_ctxt->Name[13] = 0x8B; pneg_ctxt->Name[14] = 0xCD; pneg_ctxt->Name[15] = 0x7C; } static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn, struct smb2_negotiate_rsp *rsp) { char * const pneg_ctxt = (char *)rsp + le32_to_cpu(rsp->NegotiateContextOffset); int neg_ctxt_cnt = 1; int ctxt_size; ksmbd_debug(SMB, "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt, conn->preauth_info->Preauth_HashId); ctxt_size = sizeof(struct smb2_preauth_neg_context); if (conn->cipher_type) { /* Round to 8 byte boundary */ ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_ENCRYPTION_CAPABILITIES context\n"); build_encrypt_ctxt((struct smb2_encryption_neg_context *) (pneg_ctxt + ctxt_size), conn->cipher_type); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2; } /* compression context not yet supported */ WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE); if (conn->posix_ext_supported) { ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); build_posix_ctxt((struct smb2_posix_neg_context *) (pneg_ctxt + ctxt_size)); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_posix_neg_context); } if (conn->signing_negotiated) { ctxt_size = round_up(ctxt_size, 8); ksmbd_debug(SMB, "assemble SMB2_SIGNING_CAPABILITIES context\n"); build_sign_cap_ctxt((struct smb2_signing_capabilities *) (pneg_ctxt + ctxt_size), conn->signing_algorithm); neg_ctxt_cnt++; ctxt_size += sizeof(struct smb2_signing_capabilities) + 2; } rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt); return ctxt_size + AUTH_GSS_PADDING; } static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn, struct smb2_preauth_neg_context *pneg_ctxt, int ctxt_len) { /* * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt, * which may not be present. Only check for used HashAlgorithms[1]. */ if (ctxt_len < sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN) return STATUS_INVALID_PARAMETER; if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512) return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP; conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512; return STATUS_SUCCESS; } static void decode_encrypt_ctxt(struct ksmbd_conn *conn, struct smb2_encryption_neg_context *pneg_ctxt, int ctxt_len) { int cph_cnt; int i, cphs_size; if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) { pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n"); return; } conn->cipher_type = 0; cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount); cphs_size = cph_cnt * sizeof(__le16); if (sizeof(struct smb2_encryption_neg_context) + cphs_size > ctxt_len) { pr_err("Invalid cipher count(%d)\n", cph_cnt); return; } if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF) return; for (i = 0; i < cph_cnt; i++) { if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM || pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) { ksmbd_debug(SMB, "Cipher ID = 0x%x\n", pneg_ctxt->Ciphers[i]); conn->cipher_type = pneg_ctxt->Ciphers[i]; break; } } } /** * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption * @conn: smb connection * * Return: true if connection should be encrypted, else false */ bool smb3_encryption_negotiated(struct ksmbd_conn *conn) { if (!conn->ops->generate_encryptionkey) return false; /* * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag. * SMB 3.1.1 uses the cipher_type field. */ return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) || conn->cipher_type; } static void decode_compress_ctxt(struct ksmbd_conn *conn, struct smb2_compression_capabilities_context *pneg_ctxt) { conn->compress_algorithm = SMB3_COMPRESS_NONE; } static void decode_sign_cap_ctxt(struct ksmbd_conn *conn, struct smb2_signing_capabilities *pneg_ctxt, int ctxt_len) { int sign_algo_cnt; int i, sign_alos_size; if (sizeof(struct smb2_signing_capabilities) > ctxt_len) { pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n"); return; } conn->signing_negotiated = false; sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount); sign_alos_size = sign_algo_cnt * sizeof(__le16); if (sizeof(struct smb2_signing_capabilities) + sign_alos_size > ctxt_len) { pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt); return; } for (i = 0; i < sign_algo_cnt; i++) { if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE || pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) { ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n", pneg_ctxt->SigningAlgorithms[i]); conn->signing_negotiated = true; conn->signing_algorithm = pneg_ctxt->SigningAlgorithms[i]; break; } } } static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn, struct smb2_negotiate_req *req, unsigned int len_of_smb) { /* +4 is to account for the RFC1001 len field */ struct smb2_neg_context *pctx = (struct smb2_neg_context *)req; int i = 0, len_of_ctxts; unsigned int offset = le32_to_cpu(req->NegotiateContextOffset); unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount); __le32 status = STATUS_INVALID_PARAMETER; ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt); if (len_of_smb <= offset) { ksmbd_debug(SMB, "Invalid response: negotiate context offset\n"); return status; } len_of_ctxts = len_of_smb - offset; while (i++ < neg_ctxt_cnt) { int clen, ctxt_len; if (len_of_ctxts < (int)sizeof(struct smb2_neg_context)) break; pctx = (struct smb2_neg_context *)((char *)pctx + offset); clen = le16_to_cpu(pctx->DataLength); ctxt_len = clen + sizeof(struct smb2_neg_context); if (ctxt_len > len_of_ctxts) break; if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n"); if (conn->preauth_info->Preauth_HashId) break; status = decode_preauth_ctxt(conn, (struct smb2_preauth_neg_context *)pctx, ctxt_len); if (status != STATUS_SUCCESS) break; } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n"); if (conn->cipher_type) break; decode_encrypt_ctxt(conn, (struct smb2_encryption_neg_context *)pctx, ctxt_len); } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_COMPRESSION_CAPABILITIES context\n"); if (conn->compress_algorithm) break; decode_compress_ctxt(conn, (struct smb2_compression_capabilities_context *)pctx); } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) { ksmbd_debug(SMB, "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n"); } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) { ksmbd_debug(SMB, "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n"); conn->posix_ext_supported = true; } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) { ksmbd_debug(SMB, "deassemble SMB2_SIGNING_CAPABILITIES context\n"); decode_sign_cap_ctxt(conn, (struct smb2_signing_capabilities *)pctx, ctxt_len); } /* offsets must be 8 byte aligned */ offset = (ctxt_len + 7) & ~0x7; len_of_ctxts -= offset; } return status; } /** * smb2_handle_negotiate() - handler for smb2 negotiate command * @work: smb work containing smb request buffer * * Return: 0 */ int smb2_handle_negotiate(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf); struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf); int rc = 0; unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0; __le32 status; ksmbd_debug(SMB, "Received negotiate request\n"); conn->need_neg = false; if (ksmbd_conn_good(conn)) { pr_err("conn->tcp_status is already in CifsGood State\n"); work->send_no_response = 1; return rc; } smb2_buf_len = get_rfc1002_len(work->request_buf); smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects); if (smb2_neg_size > smb2_buf_len) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (req->DialectCount == 0) { pr_err("malformed packet\n"); rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (conn->dialect == SMB311_PROT_ID) { unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset); if (smb2_buf_len < nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (smb2_neg_size > nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > nego_ctxt_off) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } } else { if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) > smb2_buf_len) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; rc = -EINVAL; goto err_out; } } conn->cli_cap = le32_to_cpu(req->Capabilities); switch (conn->dialect) { case SMB311_PROT_ID: conn->preauth_info = kzalloc(sizeof(struct preauth_integrity_info), GFP_KERNEL); if (!conn->preauth_info) { rc = -ENOMEM; rsp->hdr.Status = STATUS_INVALID_PARAMETER; goto err_out; } status = deassemble_neg_contexts(conn, req, get_rfc1002_len(work->request_buf)); if (status != STATUS_SUCCESS) { pr_err("deassemble_neg_contexts error(0x%x)\n", status); rsp->hdr.Status = status; rc = -EINVAL; kfree(conn->preauth_info); conn->preauth_info = NULL; goto err_out; } rc = init_smb3_11_server(conn); if (rc < 0) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; kfree(conn->preauth_info); conn->preauth_info = NULL; goto err_out; } ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, conn->preauth_info->Preauth_HashValue); rsp->NegotiateContextOffset = cpu_to_le32(OFFSET_OF_NEG_CONTEXT); neg_ctxt_len = assemble_neg_contexts(conn, rsp); break; case SMB302_PROT_ID: init_smb3_02_server(conn); break; case SMB30_PROT_ID: init_smb3_0_server(conn); break; case SMB21_PROT_ID: init_smb2_1_server(conn); break; case SMB2X_PROT_ID: case BAD_PROT_ID: default: ksmbd_debug(SMB, "Server dialect :0x%x not supported\n", conn->dialect); rsp->hdr.Status = STATUS_NOT_SUPPORTED; rc = -EINVAL; goto err_out; } rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); /* For stats */ conn->connection_type = conn->dialect; rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size); rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size); rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size); memcpy(conn->ClientGUID, req->ClientGUID, SMB2_CLIENT_GUID_SIZE); conn->cli_sec_mode = le16_to_cpu(req->SecurityMode); rsp->StructureSize = cpu_to_le16(65); rsp->DialectRevision = cpu_to_le16(conn->dialect); /* Not setting conn guid rsp->ServerGUID, as it * not used by client for identifying server */ memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE); rsp->SystemTime = cpu_to_le64(ksmbd_systime()); rsp->ServerStartTime = 0; ksmbd_debug(SMB, "negotiate context offset %d, count %d\n", le32_to_cpu(rsp->NegotiateContextOffset), le16_to_cpu(rsp->NegotiateContextCount)); rsp->SecurityBufferOffset = cpu_to_le16(128); rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH); ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) + le16_to_cpu(rsp->SecurityBufferOffset)); rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE; conn->use_spnego = true; if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO || server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) && req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE) conn->sign = true; else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) { server_conf.enforced_signing = true; rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE; conn->sign = true; } conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode); ksmbd_conn_set_need_negotiate(conn); err_out: if (rc) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; if (!rc) rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH + neg_ctxt_len); if (rc < 0) smb2_set_err_rsp(work); return rc; } static int alloc_preauth_hash(struct ksmbd_session *sess, struct ksmbd_conn *conn) { if (sess->Preauth_HashValue) return 0; sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue, PREAUTH_HASHVALUE_SIZE, GFP_KERNEL); if (!sess->Preauth_HashValue) return -ENOMEM; return 0; } static int generate_preauth_hash(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; u8 *preauth_hash; if (conn->dialect != SMB311_PROT_ID) return 0; if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (!preauth_sess) { preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id); if (!preauth_sess) return -ENOMEM; } preauth_hash = preauth_sess->Preauth_HashValue; } else { if (!sess->Preauth_HashValue) if (alloc_preauth_hash(sess, conn)) return -ENOMEM; preauth_hash = sess->Preauth_HashValue; } ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash); return 0; } static int decode_negotiation_token(struct ksmbd_conn *conn, struct negotiate_message *negblob, size_t sz) { if (!conn->use_spnego) return -EINVAL; if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) { if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) { conn->auth_mechs |= KSMBD_AUTH_NTLMSSP; conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP; conn->use_spnego = false; } } return 0; } static int ntlm_negotiate(struct ksmbd_work *work, struct negotiate_message *negblob, size_t negblob_len, struct smb2_sess_setup_rsp *rsp) { struct challenge_message *chgblob; unsigned char *spnego_blob = NULL; u16 spnego_blob_len; char *neg_blob; int sz, rc; ksmbd_debug(SMB, "negotiate phase\n"); rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn); if (rc) return rc; sz = le16_to_cpu(rsp->SecurityBufferOffset); chgblob = (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz); memset(chgblob, 0, sizeof(struct challenge_message)); if (!work->conn->use_spnego) { sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); if (sz < 0) return -ENOMEM; rsp->SecurityBufferLength = cpu_to_le16(sz); return 0; } sz = sizeof(struct challenge_message); sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6; neg_blob = kzalloc(sz, GFP_KERNEL); if (!neg_blob) return -ENOMEM; chgblob = (struct challenge_message *)neg_blob; sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn); if (sz < 0) { rc = -ENOMEM; goto out; } rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len, neg_blob, sz); if (rc) { rc = -ENOMEM; goto out; } sz = le16_to_cpu(rsp->SecurityBufferOffset); unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len, /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); out: kfree(spnego_blob); kfree(neg_blob); return rc; } static struct authenticate_message *user_authblob(struct ksmbd_conn *conn, struct smb2_sess_setup_req *req) { int sz; if (conn->use_spnego && conn->mechToken) return (struct authenticate_message *)conn->mechToken; sz = le16_to_cpu(req->SecurityBufferOffset); return (struct authenticate_message *)((char *)&req->hdr.ProtocolId + sz); } static struct ksmbd_user *session_user(struct ksmbd_conn *conn, struct smb2_sess_setup_req *req) { struct authenticate_message *authblob; struct ksmbd_user *user; char *name; unsigned int name_off, name_len, secbuf_len; if (conn->use_spnego && conn->mechToken) secbuf_len = conn->mechTokenLen; else secbuf_len = le16_to_cpu(req->SecurityBufferLength); if (secbuf_len < sizeof(struct authenticate_message)) { ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len); return NULL; } authblob = user_authblob(conn, req); name_off = le32_to_cpu(authblob->UserName.BufferOffset); name_len = le16_to_cpu(authblob->UserName.Length); if (secbuf_len < (u64)name_off + name_len) return NULL; name = smb_strndup_from_utf16((const char *)authblob + name_off, name_len, true, conn->local_nls); if (IS_ERR(name)) { pr_err("cannot allocate memory\n"); return NULL; } ksmbd_debug(SMB, "session setup request for user %s\n", name); user = ksmbd_login_user(name); kfree(name); return user; } static int ntlm_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct channel *chann = NULL; struct ksmbd_user *user; u64 prev_id; int sz, rc; ksmbd_debug(SMB, "authenticate phase\n"); if (conn->use_spnego) { unsigned char *spnego_blob; u16 spnego_blob_len; rc = build_spnego_ntlmssp_auth_blob(&spnego_blob, &spnego_blob_len, 0); if (rc) return -ENOMEM; sz = le16_to_cpu(rsp->SecurityBufferOffset); unsafe_memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len, /* alloc is larger than blob, see smb2_allocate_rsp_buf() */); rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len); kfree(spnego_blob); } user = session_user(conn, req); if (!user) { ksmbd_debug(SMB, "Unknown user name or an error\n"); return -EPERM; } /* Check for previous session */ prev_id = le64_to_cpu(req->PreviousSessionId); if (prev_id && prev_id != sess->id) destroy_previous_session(conn, user, prev_id); if (sess->state == SMB2_SESSION_VALID) { /* * Reuse session if anonymous try to connect * on reauthetication. */ if (conn->binding == false && ksmbd_anonymous_user(user)) { ksmbd_free_user(user); return 0; } if (!ksmbd_compare_user(sess->user, user)) { ksmbd_free_user(user); return -EPERM; } ksmbd_free_user(user); } else { sess->user = user; } if (conn->binding == false && user_guest(sess->user)) { rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE; } else { struct authenticate_message *authblob; authblob = user_authblob(conn, req); if (conn->use_spnego && conn->mechToken) sz = conn->mechTokenLen; else sz = le16_to_cpu(req->SecurityBufferLength); rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess); if (rc) { set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD); ksmbd_debug(SMB, "authentication failed\n"); return -EPERM; } } /* * If session state is SMB2_SESSION_VALID, We can assume * that it is reauthentication. And the user/password * has been verified, so return it here. */ if (sess->state == SMB2_SESSION_VALID) { if (conn->binding) goto binding_session; return 0; } if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE && (conn->sign || server_conf.enforced_signing)) || (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) sess->sign = true; if (smb3_encryption_negotiated(conn) && !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { rc = conn->ops->generate_encryptionkey(conn, sess); if (rc) { ksmbd_debug(SMB, "SMB3 encryption key generation failed\n"); return -EINVAL; } sess->enc = true; if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; /* * signing is disable if encryption is enable * on this session */ sess->sign = false; } binding_session: if (conn->dialect >= SMB30_PROT_ID) { chann = lookup_chann_list(sess, conn); if (!chann) { chann = kmalloc(sizeof(struct channel), GFP_KERNEL); if (!chann) return -ENOMEM; chann->conn = conn; xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); } } if (conn->ops->generate_signingkey) { rc = conn->ops->generate_signingkey(sess, conn); if (rc) { ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); return -EINVAL; } } if (!ksmbd_conn_lookup_dialect(conn)) { pr_err("fail to verify the dialect\n"); return -ENOENT; } return 0; } #ifdef CONFIG_SMB_SERVER_KERBEROS5 static int krb5_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; char *in_blob, *out_blob; struct channel *chann = NULL; u64 prev_sess_id; int in_len, out_len; int retval; in_blob = (char *)&req->hdr.ProtocolId + le16_to_cpu(req->SecurityBufferOffset); in_len = le16_to_cpu(req->SecurityBufferLength); out_blob = (char *)&rsp->hdr.ProtocolId + le16_to_cpu(rsp->SecurityBufferOffset); out_len = work->response_sz - (le16_to_cpu(rsp->SecurityBufferOffset) + 4); /* Check previous session */ prev_sess_id = le64_to_cpu(req->PreviousSessionId); if (prev_sess_id && prev_sess_id != sess->id) destroy_previous_session(conn, sess->user, prev_sess_id); if (sess->state == SMB2_SESSION_VALID) ksmbd_free_user(sess->user); retval = ksmbd_krb5_authenticate(sess, in_blob, in_len, out_blob, &out_len); if (retval) { ksmbd_debug(SMB, "krb5 authentication failed\n"); return -EINVAL; } rsp->SecurityBufferLength = cpu_to_le16(out_len); if ((conn->sign || server_conf.enforced_signing) || (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED)) sess->sign = true; if (smb3_encryption_negotiated(conn)) { retval = conn->ops->generate_encryptionkey(conn, sess); if (retval) { ksmbd_debug(SMB, "SMB3 encryption key generation failed\n"); return -EINVAL; } sess->enc = true; if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION) rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE; sess->sign = false; } if (conn->dialect >= SMB30_PROT_ID) { chann = lookup_chann_list(sess, conn); if (!chann) { chann = kmalloc(sizeof(struct channel), GFP_KERNEL); if (!chann) return -ENOMEM; chann->conn = conn; xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL); } } if (conn->ops->generate_signingkey) { retval = conn->ops->generate_signingkey(sess, conn); if (retval) { ksmbd_debug(SMB, "SMB3 signing key generation failed\n"); return -EINVAL; } } if (!ksmbd_conn_lookup_dialect(conn)) { pr_err("fail to verify the dialect\n"); return -ENOENT; } return 0; } #else static int krb5_authenticate(struct ksmbd_work *work, struct smb2_sess_setup_req *req, struct smb2_sess_setup_rsp *rsp) { return -EOPNOTSUPP; } #endif int smb2_sess_setup(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_sess_setup_req *req; struct smb2_sess_setup_rsp *rsp; struct ksmbd_session *sess; struct negotiate_message *negblob; unsigned int negblob_len, negblob_off; int rc = 0; ksmbd_debug(SMB, "Received request for session setup\n"); WORK_BUFFERS(work, req, rsp); rsp->StructureSize = cpu_to_le16(9); rsp->SessionFlags = 0; rsp->SecurityBufferOffset = cpu_to_le16(72); rsp->SecurityBufferLength = 0; ksmbd_conn_lock(conn); if (!req->hdr.SessionId) { sess = ksmbd_smb2_session_create(); if (!sess) { rc = -ENOMEM; goto out_err; } rsp->hdr.SessionId = cpu_to_le64(sess->id); rc = ksmbd_session_register(conn, sess); if (rc) goto out_err; conn->binding = false; } else if (conn->dialect >= SMB30_PROT_ID && (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) { u64 sess_id = le64_to_cpu(req->hdr.SessionId); sess = ksmbd_session_lookup_slowpath(sess_id); if (!sess) { rc = -ENOENT; goto out_err; } if (conn->dialect != sess->dialect) { rc = -EINVAL; goto out_err; } if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) { rc = -EINVAL; goto out_err; } if (strncmp(conn->ClientGUID, sess->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { rc = -ENOENT; goto out_err; } if (sess->state == SMB2_SESSION_IN_PROGRESS) { rc = -EACCES; goto out_err; } if (sess->state == SMB2_SESSION_EXPIRED) { rc = -EFAULT; goto out_err; } if (ksmbd_conn_need_reconnect(conn)) { rc = -EFAULT; sess = NULL; goto out_err; } if (ksmbd_session_lookup(conn, sess_id)) { rc = -EACCES; goto out_err; } if (user_guest(sess->user)) { rc = -EOPNOTSUPP; goto out_err; } conn->binding = true; } else if ((conn->dialect < SMB30_PROT_ID || server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) && (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) { sess = NULL; rc = -EACCES; goto out_err; } else { sess = ksmbd_session_lookup(conn, le64_to_cpu(req->hdr.SessionId)); if (!sess) { rc = -ENOENT; goto out_err; } if (sess->state == SMB2_SESSION_EXPIRED) { rc = -EFAULT; goto out_err; } if (ksmbd_conn_need_reconnect(conn)) { rc = -EFAULT; sess = NULL; goto out_err; } conn->binding = false; } work->sess = sess; negblob_off = le16_to_cpu(req->SecurityBufferOffset); negblob_len = le16_to_cpu(req->SecurityBufferLength); if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) { rc = -EINVAL; goto out_err; } negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId + negblob_off); if (decode_negotiation_token(conn, negblob, negblob_len) == 0) { if (conn->mechToken) { negblob = (struct negotiate_message *)conn->mechToken; negblob_len = conn->mechTokenLen; } } if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) { rc = -EINVAL; goto out_err; } if (server_conf.auth_mechs & conn->auth_mechs) { rc = generate_preauth_hash(work); if (rc) goto out_err; if (conn->preferred_auth_mech & (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) { rc = krb5_authenticate(work, req, rsp); if (rc) { rc = -EINVAL; goto out_err; } if (!ksmbd_conn_need_reconnect(conn)) { ksmbd_conn_set_good(conn); sess->state = SMB2_SESSION_VALID; } kfree(sess->Preauth_HashValue); sess->Preauth_HashValue = NULL; } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) { if (negblob->MessageType == NtLmNegotiate) { rc = ntlm_negotiate(work, negblob, negblob_len, rsp); if (rc) goto out_err; rsp->hdr.Status = STATUS_MORE_PROCESSING_REQUIRED; } else if (negblob->MessageType == NtLmAuthenticate) { rc = ntlm_authenticate(work, req, rsp); if (rc) goto out_err; if (!ksmbd_conn_need_reconnect(conn)) { ksmbd_conn_set_good(conn); sess->state = SMB2_SESSION_VALID; } if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (preauth_sess) { list_del(&preauth_sess->preauth_entry); kfree(preauth_sess); } } kfree(sess->Preauth_HashValue); sess->Preauth_HashValue = NULL; } else { pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n", le32_to_cpu(negblob->MessageType)); rc = -EINVAL; } } else { /* TODO: need one more negotiation */ pr_err("Not support the preferred authentication\n"); rc = -EINVAL; } } else { pr_err("Not support authentication\n"); rc = -EINVAL; } out_err: if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_USER_SESSION_DELETED; else if (rc == -EACCES) rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; else if (rc == -EFAULT) rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED; else if (rc == -ENOMEM) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if (rc) rsp->hdr.Status = STATUS_LOGON_FAILURE; if (conn->use_spnego && conn->mechToken) { kfree(conn->mechToken); conn->mechToken = NULL; } if (rc < 0) { /* * SecurityBufferOffset should be set to zero * in session setup error response. */ rsp->SecurityBufferOffset = 0; if (sess) { bool try_delay = false; /* * To avoid dictionary attacks (repeated session setups rapidly sent) to * connect to server, ksmbd make a delay of a 5 seconds on session setup * failure to make it harder to send enough random connection requests * to break into a server. */ if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION) try_delay = true; sess->last_active = jiffies; sess->state = SMB2_SESSION_EXPIRED; if (try_delay) { ksmbd_conn_set_need_reconnect(conn); ssleep(5); ksmbd_conn_set_need_negotiate(conn); } } smb2_set_err_rsp(work); } else { unsigned int iov_len; if (rsp->SecurityBufferLength) iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) + le16_to_cpu(rsp->SecurityBufferLength); else iov_len = sizeof(struct smb2_sess_setup_rsp); rc = ksmbd_iov_pin_rsp(work, rsp, iov_len); if (rc) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; } ksmbd_conn_unlock(conn); return rc; } /** * smb2_tree_connect() - handler for smb2 tree connect command * @work: smb work containing smb request buffer * * Return: 0 on success, otherwise error */ int smb2_tree_connect(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_tree_connect_req *req; struct smb2_tree_connect_rsp *rsp; struct ksmbd_session *sess = work->sess; char *treename = NULL, *name = NULL; struct ksmbd_tree_conn_status status; struct ksmbd_share_config *share = NULL; int rc = -EINVAL; WORK_BUFFERS(work, req, rsp); treename = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->PathOffset), le16_to_cpu(req->PathLength), true, conn->local_nls); if (IS_ERR(treename)) { pr_err("treename is NULL\n"); status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; } name = ksmbd_extract_sharename(conn->um, treename); if (IS_ERR(name)) { status.ret = KSMBD_TREE_CONN_STATUS_ERROR; goto out_err1; } ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n", name, treename); status = ksmbd_tree_conn_connect(work, name); if (status.ret == KSMBD_TREE_CONN_STATUS_OK) rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id); else goto out_err1; share = status.tree_conn->share_conf; if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC share path request\n"); rsp->ShareType = SMB2_SHARE_TYPE_PIPE; rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE | FILE_DELETE_LE | FILE_READ_CONTROL_LE | FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | FILE_SYNCHRONIZE_LE; } else { rsp->ShareType = SMB2_SHARE_TYPE_DISK; rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE | FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE; if (test_tree_conn_flag(status.tree_conn, KSMBD_TREE_CONN_FLAG_WRITABLE)) { rsp->MaximalAccess |= FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE | FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE | FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE | FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE | FILE_SYNCHRONIZE_LE; } } status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess); if (conn->posix_ext_supported) status.tree_conn->posix_extensions = true; write_lock(&sess->tree_conns_lock); status.tree_conn->t_state = TREE_CONNECTED; write_unlock(&sess->tree_conns_lock); rsp->StructureSize = cpu_to_le16(16); out_err1: if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && share && test_share_config_flag(share, KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) rsp->Capabilities = SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY; else rsp->Capabilities = 0; rsp->Reserved = 0; /* default manual caching */ rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING; rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp)); if (rc) status.ret = KSMBD_TREE_CONN_STATUS_NOMEM; if (!IS_ERR(treename)) kfree(treename); if (!IS_ERR(name)) kfree(name); switch (status.ret) { case KSMBD_TREE_CONN_STATUS_OK: rsp->hdr.Status = STATUS_SUCCESS; rc = 0; break; case -ESTALE: case -ENOENT: case KSMBD_TREE_CONN_STATUS_NO_SHARE: rsp->hdr.Status = STATUS_BAD_NETWORK_NAME; break; case -ENOMEM: case KSMBD_TREE_CONN_STATUS_NOMEM: rsp->hdr.Status = STATUS_NO_MEMORY; break; case KSMBD_TREE_CONN_STATUS_ERROR: case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS: case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS: rsp->hdr.Status = STATUS_ACCESS_DENIED; break; case -EINVAL: rsp->hdr.Status = STATUS_INVALID_PARAMETER; break; default: rsp->hdr.Status = STATUS_ACCESS_DENIED; } if (status.ret != KSMBD_TREE_CONN_STATUS_OK) smb2_set_err_rsp(work); return rc; } /** * smb2_create_open_flags() - convert smb open flags to unix open flags * @file_present: is file already present * @access: file access flags * @disposition: file disposition flags * @may_flags: set with MAY_ flags * @is_dir: is creating open flags for directory * * Return: file open flags */ static int smb2_create_open_flags(bool file_present, __le32 access, __le32 disposition, int *may_flags, bool is_dir) { int oflags = O_NONBLOCK | O_LARGEFILE; if (is_dir) { access &= ~FILE_WRITE_DESIRE_ACCESS_LE; ksmbd_debug(SMB, "Discard write access to a directory\n"); } if (access & FILE_READ_DESIRED_ACCESS_LE && access & FILE_WRITE_DESIRE_ACCESS_LE) { oflags |= O_RDWR; *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE; } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) { oflags |= O_WRONLY; *may_flags = MAY_OPEN | MAY_WRITE; } else { oflags |= O_RDONLY; *may_flags = MAY_OPEN | MAY_READ; } if (access == FILE_READ_ATTRIBUTES_LE) oflags |= O_PATH; if (file_present) { switch (disposition & FILE_CREATE_MASK_LE) { case FILE_OPEN_LE: case FILE_CREATE_LE: break; case FILE_SUPERSEDE_LE: case FILE_OVERWRITE_LE: case FILE_OVERWRITE_IF_LE: oflags |= O_TRUNC; break; default: break; } } else { switch (disposition & FILE_CREATE_MASK_LE) { case FILE_SUPERSEDE_LE: case FILE_CREATE_LE: case FILE_OPEN_IF_LE: case FILE_OVERWRITE_IF_LE: oflags |= O_CREAT; break; case FILE_OPEN_LE: case FILE_OVERWRITE_LE: oflags &= ~O_CREAT; break; default: break; } } return oflags; } /** * smb2_tree_disconnect() - handler for smb tree connect request * @work: smb work containing request buffer * * Return: 0 */ int smb2_tree_disconnect(struct ksmbd_work *work) { struct smb2_tree_disconnect_rsp *rsp; struct smb2_tree_disconnect_req *req; struct ksmbd_session *sess = work->sess; struct ksmbd_tree_connect *tcon = work->tcon; int err; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "request\n"); if (!tcon) { ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; err = -ENOENT; goto err_out; } ksmbd_close_tree_conn_fds(work); write_lock(&sess->tree_conns_lock); if (tcon->t_state == TREE_DISCONNECTED) { write_unlock(&sess->tree_conns_lock); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; err = -ENOENT; goto err_out; } WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount)); tcon->t_state = TREE_DISCONNECTED; write_unlock(&sess->tree_conns_lock); err = ksmbd_tree_conn_disconnect(sess, tcon); if (err) { rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; goto err_out; } work->tcon = NULL; rsp->StructureSize = cpu_to_le16(4); err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_disconnect_rsp)); if (err) { rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; goto err_out; } return 0; err_out: smb2_set_err_rsp(work); return err; } /** * smb2_session_logoff() - handler for session log off request * @work: smb work containing request buffer * * Return: 0 */ int smb2_session_logoff(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_logoff_req *req; struct smb2_logoff_rsp *rsp; struct ksmbd_session *sess; u64 sess_id; int err; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "request\n"); ksmbd_conn_lock(conn); if (!ksmbd_conn_good(conn)) { ksmbd_conn_unlock(conn); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; smb2_set_err_rsp(work); return -ENOENT; } sess_id = le64_to_cpu(req->hdr.SessionId); ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT); ksmbd_conn_unlock(conn); ksmbd_close_session_fds(work); ksmbd_conn_wait_idle(conn); /* * Re-lookup session to validate if session is deleted * while waiting request complete */ sess = ksmbd_session_lookup_all(conn, sess_id); if (ksmbd_tree_conn_session_logoff(sess)) { ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId); rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED; smb2_set_err_rsp(work); return -ENOENT; } ksmbd_destroy_file_table(&sess->file_table); sess->state = SMB2_SESSION_EXPIRED; ksmbd_free_user(sess->user); sess->user = NULL; ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE); rsp->StructureSize = cpu_to_le16(4); err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp)); if (err) { rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; smb2_set_err_rsp(work); return err; } return 0; } /** * create_smb2_pipe() - create IPC pipe * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ static noinline int create_smb2_pipe(struct ksmbd_work *work) { struct smb2_create_rsp *rsp; struct smb2_create_req *req; int id; int err; char *name; WORK_BUFFERS(work, req, rsp); name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength), 1, work->conn->local_nls); if (IS_ERR(name)) { rsp->hdr.Status = STATUS_NO_MEMORY; err = PTR_ERR(name); goto out; } id = ksmbd_session_rpc_open(work->sess, name); if (id < 0) { pr_err("Unable to open RPC pipe: %d\n", id); err = id; goto out; } rsp->hdr.Status = STATUS_SUCCESS; rsp->StructureSize = cpu_to_le16(89); rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE; rsp->Flags = 0; rsp->CreateAction = cpu_to_le32(FILE_OPENED); rsp->CreationTime = cpu_to_le64(0); rsp->LastAccessTime = cpu_to_le64(0); rsp->ChangeTime = cpu_to_le64(0); rsp->AllocationSize = cpu_to_le64(0); rsp->EndofFile = cpu_to_le64(0); rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE; rsp->Reserved2 = 0; rsp->VolatileFileId = id; rsp->PersistentFileId = 0; rsp->CreateContextsOffset = 0; rsp->CreateContextsLength = 0; err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer)); if (err) goto out; kfree(name); return 0; out: switch (err) { case -EINVAL: rsp->hdr.Status = STATUS_INVALID_PARAMETER; break; case -ENOSPC: case -ENOMEM: rsp->hdr.Status = STATUS_NO_MEMORY; break; } if (!IS_ERR(name)) kfree(name); smb2_set_err_rsp(work); return err; } /** * smb2_set_ea() - handler for setting extended attributes using set * info command * @eabuf: set info command buffer * @buf_len: set info command buffer length * @path: dentry path for get ea * @get_write: get write access to a mount * * Return: 0 on success, otherwise error */ static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len, const struct path *path, bool get_write) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); char *attr_name = NULL, *value; int rc = 0; unsigned int next = 0; if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength)) return -EINVAL; attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL); if (!attr_name) return -ENOMEM; do { if (!eabuf->EaNameLength) goto next; ksmbd_debug(SMB, "name : <%s>, name_len : %u, value_len : %u, next : %u\n", eabuf->name, eabuf->EaNameLength, le16_to_cpu(eabuf->EaValueLength), le32_to_cpu(eabuf->NextEntryOffset)); if (eabuf->EaNameLength > (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) { rc = -EINVAL; break; } memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN); memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name, eabuf->EaNameLength); attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0'; value = (char *)&eabuf->name + eabuf->EaNameLength + 1; if (!eabuf->EaValueLength) { rc = ksmbd_vfs_casexattr_len(idmap, path->dentry, attr_name, XATTR_USER_PREFIX_LEN + eabuf->EaNameLength); /* delete the EA only when it exits */ if (rc > 0) { rc = ksmbd_vfs_remove_xattr(idmap, path, attr_name, get_write); if (rc < 0) { ksmbd_debug(SMB, "remove xattr failed(%d)\n", rc); break; } } /* if the EA doesn't exist, just do nothing. */ rc = 0; } else { rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value, le16_to_cpu(eabuf->EaValueLength), 0, get_write); if (rc < 0) { ksmbd_debug(SMB, "ksmbd_vfs_setxattr is failed(%d)\n", rc); break; } } next: next = le32_to_cpu(eabuf->NextEntryOffset); if (next == 0 || buf_len < next) break; buf_len -= next; eabuf = (struct smb2_ea_info *)((char *)eabuf + next); if (buf_len < sizeof(struct smb2_ea_info)) { rc = -EINVAL; break; } if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength + le16_to_cpu(eabuf->EaValueLength)) { rc = -EINVAL; break; } } while (next != 0); kfree(attr_name); return rc; } static noinline int smb2_set_stream_name_xattr(const struct path *path, struct ksmbd_file *fp, char *stream_name, int s_type) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); size_t xattr_stream_size; char *xattr_stream_name; int rc; rc = ksmbd_vfs_xattr_stream_name(stream_name, &xattr_stream_name, &xattr_stream_size, s_type); if (rc) return rc; fp->stream.name = xattr_stream_name; fp->stream.size = xattr_stream_size; /* Check if there is stream prefix in xattr space */ rc = ksmbd_vfs_casexattr_len(idmap, path->dentry, xattr_stream_name, xattr_stream_size); if (rc >= 0) return 0; if (fp->cdoption == FILE_OPEN_LE) { ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc); return -EBADF; } rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false); if (rc < 0) pr_err("Failed to store XATTR stream name :%d\n", rc); return 0; } static int smb2_remove_smb_xattrs(const struct path *path) { struct mnt_idmap *idmap = mnt_idmap(path->mnt); char *name, *xattr_list = NULL; ssize_t xattr_list_len; int err = 0; xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; } else if (!xattr_list_len) { ksmbd_debug(SMB, "empty xattr in the file\n"); goto out; } for (name = xattr_list; name - xattr_list < xattr_list_len; name += strlen(name) + 1) { ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name)); if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) && !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN)) { err = ksmbd_vfs_remove_xattr(idmap, path, name, true); if (err) ksmbd_debug(SMB, "remove xattr failed : %s\n", name); } } out: kvfree(xattr_list); return err; } static int smb2_create_truncate(const struct path *path) { int rc = vfs_truncate(path, 0); if (rc) { pr_err("vfs_truncate failed, rc %d\n", rc); return rc; } rc = smb2_remove_smb_xattrs(path); if (rc == -EOPNOTSUPP) rc = 0; if (rc) ksmbd_debug(SMB, "ksmbd_truncate_stream_name_xattr failed, rc %d\n", rc); return rc; } static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, struct ksmbd_file *fp) { struct xattr_dos_attrib da = {0}; int rc; if (!test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) return; da.version = 4; da.attr = le32_to_cpu(fp->f_ci->m_fattr); da.itime = da.create_time = fp->create_time; da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | XATTR_DOSINFO_ITIME; rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, true); if (rc) ksmbd_debug(SMB, "failed to store file attribute into xattr\n"); } static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path, struct ksmbd_file *fp) { struct xattr_dos_attrib da; int rc; fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE); /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */ if (!test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) return; rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt), path->dentry, &da); if (rc > 0) { fp->f_ci->m_fattr = cpu_to_le32(da.attr); fp->create_time = da.create_time; fp->itime = da.itime; } } static int smb2_creat(struct ksmbd_work *work, struct path *parent_path, struct path *path, char *name, int open_flags, umode_t posix_mode, bool is_dir) { struct ksmbd_tree_connect *tcon = work->tcon; struct ksmbd_share_config *share = tcon->share_conf; umode_t mode; int rc; if (!(open_flags & O_CREAT)) return -EBADF; ksmbd_debug(SMB, "file does not exist, so creating\n"); if (is_dir == true) { ksmbd_debug(SMB, "creating directory\n"); mode = share_config_directory_mode(share, posix_mode); rc = ksmbd_vfs_mkdir(work, name, mode); if (rc) return rc; } else { ksmbd_debug(SMB, "creating regular file\n"); mode = share_config_create_mode(share, posix_mode); rc = ksmbd_vfs_create(work, name, mode); if (rc) return rc; } rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0); if (rc) { pr_err("cannot get linux path (%s), err = %d\n", name, rc); return rc; } return 0; } static int smb2_create_sd_buffer(struct ksmbd_work *work, struct smb2_create_req *req, const struct path *path) { struct create_context *context; struct create_sd_buf_req *sd_buf; if (!req->CreateContextsOffset) return -ENOENT; /* Parse SD BUFFER create contexts */ context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4); if (!context) return -ENOENT; else if (IS_ERR(context)) return PTR_ERR(context); ksmbd_debug(SMB, "Set ACLs using SMB2_CREATE_SD_BUFFER context\n"); sd_buf = (struct create_sd_buf_req *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_sd_buf_req)) return -EINVAL; return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd, le32_to_cpu(sd_buf->ccontext.DataLength), true, false); } static void ksmbd_acls_fattr(struct smb_fattr *fattr, struct mnt_idmap *idmap, struct inode *inode) { vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); fattr->cf_uid = vfsuid_into_kuid(vfsuid); fattr->cf_gid = vfsgid_into_kgid(vfsgid); fattr->cf_mode = inode->i_mode; fattr->cf_acls = NULL; fattr->cf_dacls = NULL; if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) { fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS); if (S_ISDIR(inode->i_mode)) fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT); } } enum { DURABLE_RECONN_V2 = 1, DURABLE_RECONN, DURABLE_REQ_V2, DURABLE_REQ, }; struct durable_info { struct ksmbd_file *fp; unsigned short int type; bool persistent; bool reconnected; unsigned int timeout; char *CreateGuid; }; static int parse_durable_handle_context(struct ksmbd_work *work, struct smb2_create_req *req, struct lease_ctx_info *lc, struct durable_info *dh_info) { struct ksmbd_conn *conn = work->conn; struct create_context *context; int dh_idx, err = 0; u64 persistent_id = 0; int req_op_level; static const char * const durable_arr[] = {"DH2C", "DHnC", "DH2Q", "DHnQ"}; req_op_level = req->RequestedOplockLevel; for (dh_idx = DURABLE_RECONN_V2; dh_idx <= ARRAY_SIZE(durable_arr); dh_idx++) { context = smb2_find_context_vals(req, durable_arr[dh_idx - 1], 4); if (IS_ERR(context)) { err = PTR_ERR(context); goto out; } if (!context) continue; switch (dh_idx) { case DURABLE_RECONN_V2: { struct create_durable_reconn_v2_req *recon_v2; if (dh_info->type == DURABLE_RECONN || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } recon_v2 = (struct create_durable_reconn_v2_req *)context; persistent_id = recon_v2->Fid.PersistentFileId; dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); if (!dh_info->fp) { ksmbd_debug(SMB, "Failed to get durable handle state\n"); err = -EBADF; goto out; } if (memcmp(dh_info->fp->create_guid, recon_v2->CreateGuid, SMB2_CREATE_GUID_SIZE)) { err = -EBADF; ksmbd_put_durable_fd(dh_info->fp); goto out; } dh_info->type = dh_idx; dh_info->reconnected = true; ksmbd_debug(SMB, "reconnect v2 Persistent-id from reconnect = %llu\n", persistent_id); break; } case DURABLE_RECONN: { struct create_durable_reconn_req *recon; if (dh_info->type == DURABLE_RECONN_V2 || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } recon = (struct create_durable_reconn_req *)context; persistent_id = recon->Data.Fid.PersistentFileId; dh_info->fp = ksmbd_lookup_durable_fd(persistent_id); if (!dh_info->fp) { ksmbd_debug(SMB, "Failed to get durable handle state\n"); err = -EBADF; goto out; } dh_info->type = dh_idx; dh_info->reconnected = true; ksmbd_debug(SMB, "reconnect Persistent-id from reconnect = %llu\n", persistent_id); break; } case DURABLE_REQ_V2: { struct create_durable_req_v2 *durable_v2_blob; if (dh_info->type == DURABLE_RECONN || dh_info->type == DURABLE_RECONN_V2) { err = -EINVAL; goto out; } durable_v2_blob = (struct create_durable_req_v2 *)context; ksmbd_debug(SMB, "Request for durable v2 open\n"); dh_info->fp = ksmbd_lookup_fd_cguid(durable_v2_blob->CreateGuid); if (dh_info->fp) { if (!memcmp(conn->ClientGUID, dh_info->fp->client_guid, SMB2_CLIENT_GUID_SIZE)) { if (!(req->hdr.Flags & SMB2_FLAGS_REPLAY_OPERATION)) { err = -ENOEXEC; goto out; } dh_info->fp->conn = conn; dh_info->reconnected = true; goto out; } } if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { dh_info->CreateGuid = durable_v2_blob->CreateGuid; dh_info->persistent = le32_to_cpu(durable_v2_blob->Flags); dh_info->timeout = le32_to_cpu(durable_v2_blob->Timeout); dh_info->type = dh_idx; } break; } case DURABLE_REQ: if (dh_info->type == DURABLE_RECONN) goto out; if (dh_info->type == DURABLE_RECONN_V2 || dh_info->type == DURABLE_REQ_V2) { err = -EINVAL; goto out; } if ((lc && (lc->req_state & SMB2_LEASE_HANDLE_CACHING_LE)) || req_op_level == SMB2_OPLOCK_LEVEL_BATCH) { ksmbd_debug(SMB, "Request for durable open\n"); dh_info->type = dh_idx; } } } out: return err; } /** * smb2_open() - handler for smb file open request * @work: smb work containing request buffer * * Return: 0 on success, otherwise error */ int smb2_open(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct ksmbd_tree_connect *tcon = work->tcon; struct smb2_create_req *req; struct smb2_create_rsp *rsp; struct path path, parent_path; struct ksmbd_share_config *share = tcon->share_conf; struct ksmbd_file *fp = NULL; struct file *filp = NULL; struct mnt_idmap *idmap = NULL; struct kstat stat; struct create_context *context; struct lease_ctx_info *lc = NULL; struct create_ea_buf_req *ea_buf = NULL; struct oplock_info *opinfo; struct durable_info dh_info = {0}; __le32 *next_ptr = NULL; int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0; int rc = 0; int contxt_cnt = 0, query_disk_id = 0; int maximal_access_ctxt = 0, posix_ctxt = 0; int s_type = 0; int next_off = 0; char *name = NULL; char *stream_name = NULL; bool file_present = false, created = false, already_permitted = false; int share_ret, need_truncate = 0; u64 time; umode_t posix_mode = 0; __le32 daccess, maximal_access = 0; int iov_len = 0; WORK_BUFFERS(work, req, rsp); if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off && (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) { ksmbd_debug(SMB, "invalid flag in chained command\n"); rsp->hdr.Status = STATUS_INVALID_PARAMETER; smb2_set_err_rsp(work); return -EINVAL; } if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe create request\n"); return create_smb2_pipe(work); } if (req->NameLength) { name = smb2_get_name((char *)req + le16_to_cpu(req->NameOffset), le16_to_cpu(req->NameLength), work->conn->local_nls); if (IS_ERR(name)) { rc = PTR_ERR(name); name = NULL; goto err_out2; } ksmbd_debug(SMB, "converted name = %s\n", name); if (strchr(name, ':')) { if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_STREAMS)) { rc = -EBADF; goto err_out2; } rc = parse_stream_name(name, &stream_name, &s_type); if (rc < 0) goto err_out2; } rc = ksmbd_validate_filename(name); if (rc < 0) goto err_out2; if (ksmbd_share_veto_filename(share, name)) { rc = -ENOENT; ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n", name); goto err_out2; } } else { name = kstrdup("", GFP_KERNEL); if (!name) { rc = -ENOMEM; goto err_out2; } } req_op_level = req->RequestedOplockLevel; if (server_conf.flags & KSMBD_GLOBAL_FLAG_DURABLE_HANDLE && req->CreateContextsOffset) { lc = parse_lease_state(req); rc = parse_durable_handle_context(work, req, lc, &dh_info); if (rc) { ksmbd_debug(SMB, "error parsing durable handle context\n"); goto err_out2; } if (dh_info.reconnected == true) { rc = smb2_check_durable_oplock(conn, share, dh_info.fp, lc, name); if (rc) { ksmbd_put_durable_fd(dh_info.fp); goto err_out2; } rc = ksmbd_reopen_durable_fd(work, dh_info.fp); if (rc) { ksmbd_put_durable_fd(dh_info.fp); goto err_out2; } if (ksmbd_override_fsids(work)) { rc = -ENOMEM; ksmbd_put_durable_fd(dh_info.fp); goto err_out2; } fp = dh_info.fp; file_info = FILE_OPENED; rc = ksmbd_vfs_getattr(&fp->filp->f_path, &stat); if (rc) goto err_out2; ksmbd_put_durable_fd(fp); goto reconnected_fp; } } else if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) lc = parse_lease_state(req); if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) { pr_err("Invalid impersonationlevel : 0x%x\n", le32_to_cpu(req->ImpersonationLevel)); rc = -EIO; rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL; goto err_out2; } if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) { pr_err("Invalid create options : 0x%x\n", le32_to_cpu(req->CreateOptions)); rc = -EINVAL; goto err_out2; } else { if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE && req->CreateOptions & FILE_RANDOM_ACCESS_LE) req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE); if (req->CreateOptions & (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION | FILE_RESERVE_OPFILTER_LE)) { rc = -EOPNOTSUPP; goto err_out2; } if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) { rc = -EINVAL; goto err_out2; } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) { req->CreateOptions = ~(FILE_NO_COMPRESSION_LE); } } } if (le32_to_cpu(req->CreateDisposition) > le32_to_cpu(FILE_OVERWRITE_IF_LE)) { pr_err("Invalid create disposition : 0x%x\n", le32_to_cpu(req->CreateDisposition)); rc = -EINVAL; goto err_out2; } if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) { pr_err("Invalid desired access : 0x%x\n", le32_to_cpu(req->DesiredAccess)); rc = -EACCES; goto err_out2; } if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) { pr_err("Invalid file attribute : 0x%x\n", le32_to_cpu(req->FileAttributes)); rc = -EINVAL; goto err_out2; } if (req->CreateContextsOffset) { /* Parse non-durable handle create contexts */ context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ea_buf = (struct create_ea_buf_req *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_ea_buf_req)) { rc = -EINVAL; goto err_out2; } if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) { rsp->hdr.Status = STATUS_ACCESS_DENIED; rc = -EACCES; goto err_out2; } } context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ksmbd_debug(SMB, "get query maximal access context\n"); maximal_access_ctxt = 1; } context = smb2_find_context_vals(req, SMB2_CREATE_TIMEWARP_REQUEST, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { ksmbd_debug(SMB, "get timewarp context\n"); rc = -EBADF; goto err_out2; } if (tcon->posix_extensions) { context = smb2_find_context_vals(req, SMB2_CREATE_TAG_POSIX, 16); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out2; } else if (context) { struct create_posix *posix = (struct create_posix *)context; if (le16_to_cpu(context->DataOffset) + le32_to_cpu(context->DataLength) < sizeof(struct create_posix) - 4) { rc = -EINVAL; goto err_out2; } ksmbd_debug(SMB, "get posix context\n"); posix_mode = le32_to_cpu(posix->Mode); posix_ctxt = 1; } } } if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out2; } rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS, &parent_path, &path, 1); if (!rc) { file_present = true; if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) { /* * If file exists with under flags, return access * denied error. */ if (req->CreateDisposition == FILE_OVERWRITE_IF_LE || req->CreateDisposition == FILE_OPEN_IF_LE) { rc = -EACCES; goto err_out; } if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); rc = -EACCES; goto err_out; } } else if (d_is_symlink(path.dentry)) { rc = -EACCES; goto err_out; } idmap = mnt_idmap(path.mnt); } else { if (rc != -ENOENT) goto err_out; ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n", name, rc); rc = 0; } if (stream_name) { if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) { if (s_type == DATA_STREAM) { rc = -EIO; rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; } } else { if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) && s_type == DATA_STREAM) { rc = -EIO; rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; } } if (req->CreateOptions & FILE_DIRECTORY_FILE_LE && req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) { rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; rc = -EIO; } if (rc < 0) goto err_out; } if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE && S_ISDIR(d_inode(path.dentry)->i_mode) && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n", name, req->CreateOptions); rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; rc = -EIO; goto err_out; } if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) && !(req->CreateDisposition == FILE_CREATE_LE) && !S_ISDIR(d_inode(path.dentry)->i_mode)) { rsp->hdr.Status = STATUS_NOT_A_DIRECTORY; rc = -EIO; goto err_out; } if (!stream_name && file_present && req->CreateDisposition == FILE_CREATE_LE) { rc = -EEXIST; goto err_out; } daccess = smb_map_generic_desired_access(req->DesiredAccess); if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { rc = smb_check_perm_dacl(conn, &path, &daccess, sess->user->uid); if (rc) goto err_out; } if (daccess & FILE_MAXIMAL_ACCESS_LE) { if (!file_present) { daccess = cpu_to_le32(GENERIC_ALL_FLAGS); } else { ksmbd_vfs_query_maximal_access(idmap, path.dentry, &daccess); already_permitted = true; } maximal_access = daccess; } open_flags = smb2_create_open_flags(file_present, daccess, req->CreateDisposition, &may_flags, req->CreateOptions & FILE_DIRECTORY_FILE_LE || (file_present && S_ISDIR(d_inode(path.dentry)->i_mode))); if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { if (open_flags & (O_CREAT | O_TRUNC)) { ksmbd_debug(SMB, "User does not have write permission\n"); rc = -EACCES; goto err_out; } } /*create file if not present */ if (!file_present) { rc = smb2_creat(work, &parent_path, &path, name, open_flags, posix_mode, req->CreateOptions & FILE_DIRECTORY_FILE_LE); if (rc) { if (rc == -ENOENT) { rc = -EIO; rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND; } goto err_out; } created = true; idmap = mnt_idmap(path.mnt); if (ea_buf) { if (le32_to_cpu(ea_buf->ccontext.DataLength) < sizeof(struct smb2_ea_info)) { rc = -EINVAL; goto err_out; } rc = smb2_set_ea(&ea_buf->ea, le32_to_cpu(ea_buf->ccontext.DataLength), &path, false); if (rc == -EOPNOTSUPP) rc = 0; else if (rc) goto err_out; } } else if (!already_permitted) { /* FILE_READ_ATTRIBUTE is allowed without inode_permission, * because execute(search) permission on a parent directory, * is already granted. */ if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) { rc = inode_permission(idmap, d_inode(path.dentry), may_flags); if (rc) goto err_out; if ((daccess & FILE_DELETE_LE) || (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) { rc = inode_permission(idmap, d_inode(path.dentry->d_parent), MAY_EXEC | MAY_WRITE); if (rc) goto err_out; } } } rc = ksmbd_query_inode_status(path.dentry->d_parent); if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) { rc = -EBUSY; goto err_out; } rc = 0; filp = dentry_open(&path, open_flags, current_cred()); if (IS_ERR(filp)) { rc = PTR_ERR(filp); pr_err("dentry open for dir failed, rc %d\n", rc); goto err_out; } if (file_present) { if (!(open_flags & O_TRUNC)) file_info = FILE_OPENED; else file_info = FILE_OVERWRITTEN; if ((req->CreateDisposition & FILE_CREATE_MASK_LE) == FILE_SUPERSEDE_LE) file_info = FILE_SUPERSEDED; } else if (open_flags & O_CREAT) { file_info = FILE_CREATED; } ksmbd_vfs_set_fadvise(filp, req->CreateOptions); /* Obtain Volatile-ID */ fp = ksmbd_open_fd(work, filp); if (IS_ERR(fp)) { fput(filp); rc = PTR_ERR(fp); fp = NULL; goto err_out; } /* Get Persistent-ID */ ksmbd_open_durable_fd(fp); if (!has_file_id(fp->persistent_id)) { rc = -ENOMEM; goto err_out; } fp->cdoption = req->CreateDisposition; fp->daccess = daccess; fp->saccess = req->ShareAccess; fp->coption = req->CreateOptions; /* Set default windows and posix acls if creating new file */ if (created) { int posix_acl_rc; struct inode *inode = d_inode(path.dentry); posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap, &path, d_inode(path.dentry->d_parent)); if (posix_acl_rc) ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) { rc = smb_inherit_dacl(conn, &path, sess->user->uid, sess->user->gid); } if (rc) { rc = smb2_create_sd_buffer(work, req, &path); if (rc) { if (posix_acl_rc) ksmbd_vfs_set_init_posix_acl(idmap, &path); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) { struct smb_fattr fattr; struct smb_ntsd *pntsd; int pntsd_size, ace_num = 0; ksmbd_acls_fattr(&fattr, idmap, inode); if (fattr.cf_acls) ace_num = fattr.cf_acls->a_count; if (fattr.cf_dacls) ace_num += fattr.cf_dacls->a_count; pntsd = kmalloc(sizeof(struct smb_ntsd) + sizeof(struct smb_sid) * 3 + sizeof(struct smb_acl) + sizeof(struct smb_ace) * ace_num * 2, GFP_KERNEL); if (!pntsd) { posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); goto err_out; } rc = build_sec_desc(idmap, pntsd, NULL, 0, OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO, &pntsd_size, &fattr); posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); if (rc) { kfree(pntsd); goto err_out; } rc = ksmbd_vfs_set_sd_xattr(conn, idmap, &path, pntsd, pntsd_size, false); kfree(pntsd); if (rc) pr_err("failed to store ntacl in xattr : %d\n", rc); } } } rc = 0; } if (stream_name) { rc = smb2_set_stream_name_xattr(&path, fp, stream_name, s_type); if (rc) goto err_out; file_info = FILE_CREATED; } fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE)); /* fp should be searchable through ksmbd_inode.m_fp_list * after daccess, saccess, attrib_only, and stream are * initialized. */ down_write(&fp->f_ci->m_lock); list_add(&fp->node, &fp->f_ci->m_fp_list); up_write(&fp->f_ci->m_lock); /* Check delete pending among previous fp before oplock break */ if (ksmbd_inode_pending_delete(fp)) { rc = -EBUSY; goto err_out; } if (file_present || created) ksmbd_vfs_kern_path_unlock(&parent_path, &path); if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC && !fp->attrib_only && !stream_name) { smb_break_all_oplock(work, fp); need_truncate = 1; } share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp); if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) || (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) { if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) { rc = share_ret; goto err_out1; } } else { if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE && lc) { if (S_ISDIR(file_inode(filp)->i_mode)) { lc->req_state &= ~SMB2_LEASE_WRITE_CACHING_LE; lc->is_dir = true; } /* * Compare parent lease using parent key. If there is no * a lease that has same parent key, Send lease break * notification. */ smb_send_parent_lease_break_noti(fp, lc); req_op_level = smb2_map_lease_to_oplock(lc->req_state); ksmbd_debug(SMB, "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n", name, req_op_level, lc->req_state); rc = find_same_lease_key(sess, fp->f_ci, lc); if (rc) goto err_out1; } else if (open_flags == O_RDONLY && (req_op_level == SMB2_OPLOCK_LEVEL_BATCH || req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE)) req_op_level = SMB2_OPLOCK_LEVEL_II; rc = smb_grant_oplock(work, req_op_level, fp->persistent_id, fp, le32_to_cpu(req->hdr.Id.SyncId.TreeId), lc, share_ret); if (rc < 0) goto err_out1; } if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) ksmbd_fd_set_delete_on_close(fp, file_info); if (need_truncate) { rc = smb2_create_truncate(&fp->filp->f_path); if (rc) goto err_out1; } if (req->CreateContextsOffset) { struct create_alloc_size_req *az_req; az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req, SMB2_CREATE_ALLOCATION_SIZE, 4); if (IS_ERR(az_req)) { rc = PTR_ERR(az_req); goto err_out1; } else if (az_req) { loff_t alloc_size; int err; if (le16_to_cpu(az_req->ccontext.DataOffset) + le32_to_cpu(az_req->ccontext.DataLength) < sizeof(struct create_alloc_size_req)) { rc = -EINVAL; goto err_out1; } alloc_size = le64_to_cpu(az_req->AllocationSize); ksmbd_debug(SMB, "request smb2 create allocate size : %llu\n", alloc_size); smb_break_all_levII_oplock(work, fp, 1); err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, alloc_size); if (err < 0) ksmbd_debug(SMB, "vfs_fallocate is failed : %d\n", err); } context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4); if (IS_ERR(context)) { rc = PTR_ERR(context); goto err_out1; } else if (context) { ksmbd_debug(SMB, "get query on disk id context\n"); query_disk_id = 1; } } rc = ksmbd_vfs_getattr(&path, &stat); if (rc) goto err_out1; if (stat.result_mask & STATX_BTIME) fp->create_time = ksmbd_UnixTimeToNT(stat.btime); else fp->create_time = ksmbd_UnixTimeToNT(stat.ctime); if (req->FileAttributes || fp->f_ci->m_fattr == 0) fp->f_ci->m_fattr = cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes))); if (!created) smb2_update_xattrs(tcon, &path, fp); else smb2_new_xattrs(tcon, &path, fp); memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE); if (dh_info.type == DURABLE_REQ_V2 || dh_info.type == DURABLE_REQ) { if (dh_info.type == DURABLE_REQ_V2 && dh_info.persistent && test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_CONTINUOUS_AVAILABILITY)) fp->is_persistent = true; else fp->is_durable = true; if (dh_info.type == DURABLE_REQ_V2) { memcpy(fp->create_guid, dh_info.CreateGuid, SMB2_CREATE_GUID_SIZE); if (dh_info.timeout) fp->durable_timeout = min(dh_info.timeout, DURABLE_HANDLE_MAX_TIMEOUT); else fp->durable_timeout = 60; } } reconnected_fp: rsp->StructureSize = cpu_to_le16(89); rcu_read_lock(); opinfo = rcu_dereference(fp->f_opinfo); rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0; rcu_read_unlock(); rsp->Flags = 0; rsp->CreateAction = cpu_to_le32(file_info); rsp->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); rsp->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); rsp->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); rsp->ChangeTime = cpu_to_le64(time); rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.blocks << 9); rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); rsp->FileAttributes = fp->f_ci->m_fattr; rsp->Reserved2 = 0; rsp->PersistentFileId = fp->persistent_id; rsp->VolatileFileId = fp->volatile_id; rsp->CreateContextsOffset = 0; rsp->CreateContextsLength = 0; iov_len = offsetof(struct smb2_create_rsp, Buffer); /* If lease is request send lease context response */ if (opinfo && opinfo->is_lease) { struct create_context *lease_ccontext; ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n", name, opinfo->o_lease->state); rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE; lease_ccontext = (struct create_context *)rsp->Buffer; contxt_cnt++; create_lease_buf(rsp->Buffer, opinfo->o_lease); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_lease_size); iov_len += conn->vals->create_lease_size; next_ptr = &lease_ccontext->Next; next_off = conn->vals->create_lease_size; } if (maximal_access_ctxt) { struct create_context *mxac_ccontext; if (maximal_access == 0) ksmbd_vfs_query_maximal_access(idmap, path.dentry, &maximal_access); mxac_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; create_mxac_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), le32_to_cpu(maximal_access)); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_mxac_size); iov_len += conn->vals->create_mxac_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &mxac_ccontext->Next; next_off = conn->vals->create_mxac_size; } if (query_disk_id) { struct create_context *disk_id_ccontext; disk_id_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; create_disk_id_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), stat.ino, tcon->id); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_disk_id_size); iov_len += conn->vals->create_disk_id_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &disk_id_ccontext->Next; next_off = conn->vals->create_disk_id_size; } if (dh_info.type == DURABLE_REQ || dh_info.type == DURABLE_REQ_V2) { struct create_context *durable_ccontext; durable_ccontext = (struct create_context *)(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); contxt_cnt++; if (dh_info.type == DURABLE_REQ) { create_durable_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength)); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_durable_size); iov_len += conn->vals->create_durable_size; } else { create_durable_v2_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), fp); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_durable_v2_size); iov_len += conn->vals->create_durable_v2_size; } if (next_ptr) *next_ptr = cpu_to_le32(next_off); next_ptr = &durable_ccontext->Next; next_off = conn->vals->create_durable_size; } if (posix_ctxt) { contxt_cnt++; create_posix_rsp_buf(rsp->Buffer + le32_to_cpu(rsp->CreateContextsLength), fp); le32_add_cpu(&rsp->CreateContextsLength, conn->vals->create_posix_size); iov_len += conn->vals->create_posix_size; if (next_ptr) *next_ptr = cpu_to_le32(next_off); } if (contxt_cnt > 0) { rsp->CreateContextsOffset = cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer)); } err_out: if (rc && (file_present || created)) ksmbd_vfs_kern_path_unlock(&parent_path, &path); err_out1: ksmbd_revert_fsids(work); err_out2: if (!rc) { ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len); } if (rc) { if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; else if (rc == -EPERM) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (rc == -EBUSY) rsp->hdr.Status = STATUS_DELETE_PENDING; else if (rc == -EBADF) rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; else if (rc == -ENOEXEC) rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID; else if (rc == -ENXIO) rsp->hdr.Status = STATUS_NO_SUCH_DEVICE; else if (rc == -EEXIST) rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; else if (rc == -EMFILE) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; if (!rsp->hdr.Status) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; if (fp) ksmbd_fd_put(work, fp); smb2_set_err_rsp(work); ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status); } kfree(name); kfree(lc); return rc; } static int readdir_info_level_struct_sz(int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: return sizeof(struct file_full_directory_info); case FILE_BOTH_DIRECTORY_INFORMATION: return sizeof(struct file_both_directory_info); case FILE_DIRECTORY_INFORMATION: return sizeof(struct file_directory_info); case FILE_NAMES_INFORMATION: return sizeof(struct file_names_info); case FILEID_FULL_DIRECTORY_INFORMATION: return sizeof(struct file_id_full_dir_info); case FILEID_BOTH_DIRECTORY_INFORMATION: return sizeof(struct file_id_both_directory_info); case SMB_FIND_FILE_POSIX_INFO: return sizeof(struct smb2_posix_info); default: return -EOPNOTSUPP; } } static int dentry_name(struct ksmbd_dir_info *d_info, int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { struct file_full_directory_info *ffdinfo; ffdinfo = (struct file_full_directory_info *)d_info->rptr; d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset); d_info->name = ffdinfo->FileName; d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength); return 0; } case FILE_BOTH_DIRECTORY_INFORMATION: { struct file_both_directory_info *fbdinfo; fbdinfo = (struct file_both_directory_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset); d_info->name = fbdinfo->FileName; d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength); return 0; } case FILE_DIRECTORY_INFORMATION: { struct file_directory_info *fdinfo; fdinfo = (struct file_directory_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset); d_info->name = fdinfo->FileName; d_info->name_len = le32_to_cpu(fdinfo->FileNameLength); return 0; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset); d_info->name = fninfo->FileName; d_info->name_len = le32_to_cpu(fninfo->FileNameLength); return 0; } case FILEID_FULL_DIRECTORY_INFORMATION: { struct file_id_full_dir_info *dinfo; dinfo = (struct file_id_full_dir_info *)d_info->rptr; d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset); d_info->name = dinfo->FileName; d_info->name_len = le32_to_cpu(dinfo->FileNameLength); return 0; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)d_info->rptr; d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset); d_info->name = fibdinfo->FileName; d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength); return 0; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; posix_info = (struct smb2_posix_info *)d_info->rptr; d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset); d_info->name = posix_info->name; d_info->name_len = le32_to_cpu(posix_info->name_len); return 0; } default: return -EINVAL; } } /** * smb2_populate_readdir_entry() - encode directory entry in smb2 response * buffer * @conn: connection instance * @info_level: smb information level * @d_info: structure included variables for query dir * @ksmbd_kstat: ksmbd wrapper of dirent stat information * * if directory has many entries, find first can't read it fully. * find next might be called multiple times to read remaining dir entries * * Return: 0 on success, otherwise error */ static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level, struct ksmbd_dir_info *d_info, struct ksmbd_kstat *ksmbd_kstat) { int next_entry_offset = 0; char *conv_name; int conv_len; void *kstat; int struct_sz, rc = 0; conv_name = ksmbd_convert_dir_info_name(d_info, conn->local_nls, &conv_len); if (!conv_name) return -ENOMEM; /* Somehow the name has only terminating NULL bytes */ if (conv_len < 0) { rc = -EINVAL; goto free_conv_name; } struct_sz = readdir_info_level_struct_sz(info_level) + conv_len; next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT); d_info->last_entry_off_align = next_entry_offset - struct_sz; if (next_entry_offset > d_info->out_buf_len) { d_info->out_buf_len = 0; rc = -ENOSPC; goto free_conv_name; } kstat = d_info->wptr; if (info_level != FILE_NAMES_INFORMATION) kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat); switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { struct file_full_directory_info *ffdinfo; ffdinfo = (struct file_full_directory_info *)kstat; ffdinfo->FileNameLength = cpu_to_le32(conv_len); ffdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (ffdinfo->EaSize) ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; if (d_info->hide_dot_file && d_info->name[0] == '.') ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(ffdinfo->FileName, conv_name, conv_len); ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_BOTH_DIRECTORY_INFORMATION: { struct file_both_directory_info *fbdinfo; fbdinfo = (struct file_both_directory_info *)kstat; fbdinfo->FileNameLength = cpu_to_le32(conv_len); fbdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (fbdinfo->EaSize) fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; fbdinfo->ShortNameLength = 0; fbdinfo->Reserved = 0; if (d_info->hide_dot_file && d_info->name[0] == '.') fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fbdinfo->FileName, conv_name, conv_len); fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_DIRECTORY_INFORMATION: { struct file_directory_info *fdinfo; fdinfo = (struct file_directory_info *)kstat; fdinfo->FileNameLength = cpu_to_le32(conv_len); if (d_info->hide_dot_file && d_info->name[0] == '.') fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fdinfo->FileName, conv_name, conv_len); fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)kstat; fninfo->FileNameLength = cpu_to_le32(conv_len); memcpy(fninfo->FileName, conv_name, conv_len); fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_FULL_DIRECTORY_INFORMATION: { struct file_id_full_dir_info *dinfo; dinfo = (struct file_id_full_dir_info *)kstat; dinfo->FileNameLength = cpu_to_le32(conv_len); dinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (dinfo->EaSize) dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; dinfo->Reserved = 0; dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); if (d_info->hide_dot_file && d_info->name[0] == '.') dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(dinfo->FileName, conv_name, conv_len); dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)kstat; fibdinfo->FileNameLength = cpu_to_le32(conv_len); fibdinfo->EaSize = smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode); if (fibdinfo->EaSize) fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE; fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino); fibdinfo->ShortNameLength = 0; fibdinfo->Reserved = 0; fibdinfo->Reserved2 = cpu_to_le16(0); if (d_info->hide_dot_file && d_info->name[0] == '.') fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; memcpy(fibdinfo->FileName, conv_name, conv_len); fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; u64 time; posix_info = (struct smb2_posix_info *)kstat; posix_info->Ignored = 0; posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime); posix_info->ChangeTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime); posix_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime); posix_info->LastWriteTime = cpu_to_le64(time); posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size); posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9); posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev); posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink); posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777); posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino); posix_info->DosAttributes = S_ISDIR(ksmbd_kstat->kstat->mode) ? FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE; if (d_info->hide_dot_file && d_info->name[0] == '.') posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE; /* * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)). * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + * sub_auth(4 * 1(num_subauth)) + RID(4). */ id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid), SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]); id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid), SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]); memcpy(posix_info->name, conv_name, conv_len); posix_info->name_len = cpu_to_le32(conv_len); posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } } /* switch (info_level) */ d_info->last_entry_offset = d_info->data_count; d_info->data_count += next_entry_offset; d_info->out_buf_len -= next_entry_offset; d_info->wptr += next_entry_offset; ksmbd_debug(SMB, "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n", info_level, d_info->out_buf_len, next_entry_offset, d_info->data_count); free_conv_name: kfree(conv_name); return rc; } struct smb2_query_dir_private { struct ksmbd_work *work; char *search_pattern; struct ksmbd_file *dir_fp; struct ksmbd_dir_info *d_info; int info_level; }; static void lock_dir(struct ksmbd_file *dir_fp) { struct dentry *dir = dir_fp->filp->f_path.dentry; inode_lock_nested(d_inode(dir), I_MUTEX_PARENT); } static void unlock_dir(struct ksmbd_file *dir_fp) { struct dentry *dir = dir_fp->filp->f_path.dentry; inode_unlock(d_inode(dir)); } static int process_query_dir_entries(struct smb2_query_dir_private *priv) { struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp); struct kstat kstat; struct ksmbd_kstat ksmbd_kstat; int rc; int i; for (i = 0; i < priv->d_info->num_entry; i++) { struct dentry *dent; if (dentry_name(priv->d_info, priv->info_level)) return -EINVAL; lock_dir(priv->dir_fp); dent = lookup_one(idmap, priv->d_info->name, priv->dir_fp->filp->f_path.dentry, priv->d_info->name_len); unlock_dir(priv->dir_fp); if (IS_ERR(dent)) { ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n", priv->d_info->name, PTR_ERR(dent)); continue; } if (unlikely(d_is_negative(dent))) { dput(dent); ksmbd_debug(SMB, "Negative dentry `%s'\n", priv->d_info->name); continue; } ksmbd_kstat.kstat = &kstat; if (priv->info_level != FILE_NAMES_INFORMATION) { rc = ksmbd_vfs_fill_dentry_attrs(priv->work, idmap, dent, &ksmbd_kstat); if (rc) { dput(dent); continue; } } rc = smb2_populate_readdir_entry(priv->work->conn, priv->info_level, priv->d_info, &ksmbd_kstat); dput(dent); if (rc) return rc; } return 0; } static int reserve_populate_dentry(struct ksmbd_dir_info *d_info, int info_level) { int struct_sz; int conv_len; int next_entry_offset; struct_sz = readdir_info_level_struct_sz(info_level); if (struct_sz == -EOPNOTSUPP) return -EOPNOTSUPP; conv_len = (d_info->name_len + 1) * 2; next_entry_offset = ALIGN(struct_sz + conv_len, KSMBD_DIR_INFO_ALIGNMENT); if (next_entry_offset > d_info->out_buf_len) { d_info->out_buf_len = 0; return -ENOSPC; } switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: { struct file_full_directory_info *ffdinfo; ffdinfo = (struct file_full_directory_info *)d_info->wptr; memcpy(ffdinfo->FileName, d_info->name, d_info->name_len); ffdinfo->FileName[d_info->name_len] = 0x00; ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len); ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_BOTH_DIRECTORY_INFORMATION: { struct file_both_directory_info *fbdinfo; fbdinfo = (struct file_both_directory_info *)d_info->wptr; memcpy(fbdinfo->FileName, d_info->name, d_info->name_len); fbdinfo->FileName[d_info->name_len] = 0x00; fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_DIRECTORY_INFORMATION: { struct file_directory_info *fdinfo; fdinfo = (struct file_directory_info *)d_info->wptr; memcpy(fdinfo->FileName, d_info->name, d_info->name_len); fdinfo->FileName[d_info->name_len] = 0x00; fdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILE_NAMES_INFORMATION: { struct file_names_info *fninfo; fninfo = (struct file_names_info *)d_info->wptr; memcpy(fninfo->FileName, d_info->name, d_info->name_len); fninfo->FileName[d_info->name_len] = 0x00; fninfo->FileNameLength = cpu_to_le32(d_info->name_len); fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_FULL_DIRECTORY_INFORMATION: { struct file_id_full_dir_info *dinfo; dinfo = (struct file_id_full_dir_info *)d_info->wptr; memcpy(dinfo->FileName, d_info->name, d_info->name_len); dinfo->FileName[d_info->name_len] = 0x00; dinfo->FileNameLength = cpu_to_le32(d_info->name_len); dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case FILEID_BOTH_DIRECTORY_INFORMATION: { struct file_id_both_directory_info *fibdinfo; fibdinfo = (struct file_id_both_directory_info *)d_info->wptr; memcpy(fibdinfo->FileName, d_info->name, d_info->name_len); fibdinfo->FileName[d_info->name_len] = 0x00; fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len); fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } case SMB_FIND_FILE_POSIX_INFO: { struct smb2_posix_info *posix_info; posix_info = (struct smb2_posix_info *)d_info->wptr; memcpy(posix_info->name, d_info->name, d_info->name_len); posix_info->name[d_info->name_len] = 0x00; posix_info->name_len = cpu_to_le32(d_info->name_len); posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset); break; } } /* switch (info_level) */ d_info->num_entry++; d_info->out_buf_len -= next_entry_offset; d_info->wptr += next_entry_offset; return 0; } static bool __query_dir(struct dir_context *ctx, const char *name, int namlen, loff_t offset, u64 ino, unsigned int d_type) { struct ksmbd_readdir_data *buf; struct smb2_query_dir_private *priv; struct ksmbd_dir_info *d_info; int rc; buf = container_of(ctx, struct ksmbd_readdir_data, ctx); priv = buf->private; d_info = priv->d_info; /* dot and dotdot entries are already reserved */ if (!strcmp(".", name) || !strcmp("..", name)) return true; if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name)) return true; if (!match_pattern(name, namlen, priv->search_pattern)) return true; d_info->name = name; d_info->name_len = namlen; rc = reserve_populate_dentry(d_info, priv->info_level); if (rc) return false; if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY) d_info->out_buf_len = 0; return true; } static int verify_info_level(int info_level) { switch (info_level) { case FILE_FULL_DIRECTORY_INFORMATION: case FILE_BOTH_DIRECTORY_INFORMATION: case FILE_DIRECTORY_INFORMATION: case FILE_NAMES_INFORMATION: case FILEID_FULL_DIRECTORY_INFORMATION: case FILEID_BOTH_DIRECTORY_INFORMATION: case SMB_FIND_FILE_POSIX_INFO: break; default: return -EOPNOTSUPP; } return 0; } static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len) { int free_len; free_len = (int)(work->response_sz - (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len; return free_len; } static int smb2_calc_max_out_buf_len(struct ksmbd_work *work, unsigned short hdr2_len, unsigned int out_buf_len) { int free_len; if (out_buf_len > work->conn->vals->max_trans_size) return -EINVAL; free_len = smb2_resp_buf_len(work, hdr2_len); if (free_len < 0) return -EINVAL; return min_t(int, out_buf_len, free_len); } int smb2_query_dir(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_query_directory_req *req; struct smb2_query_directory_rsp *rsp; struct ksmbd_share_config *share = work->tcon->share_conf; struct ksmbd_file *dir_fp = NULL; struct ksmbd_dir_info d_info; int rc = 0; char *srch_ptr = NULL; unsigned char srch_flag; int buffer_sz; struct smb2_query_dir_private query_dir_private = {NULL, }; WORK_BUFFERS(work, req, rsp); if (ksmbd_override_fsids(work)) { rsp->hdr.Status = STATUS_NO_MEMORY; smb2_set_err_rsp(work); return -ENOMEM; } rc = verify_info_level(req->FileInformationClass); if (rc) { rc = -EFAULT; goto err_out2; } dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!dir_fp) { rc = -EBADF; goto err_out2; } if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) || inode_permission(file_mnt_idmap(dir_fp->filp), file_inode(dir_fp->filp), MAY_READ | MAY_EXEC)) { pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp); rc = -EACCES; goto err_out2; } if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) { pr_err("can't do query dir for a file\n"); rc = -EINVAL; goto err_out2; } srch_flag = req->Flags; srch_ptr = smb_strndup_from_utf16((char *)req + le16_to_cpu(req->FileNameOffset), le16_to_cpu(req->FileNameLength), 1, conn->local_nls); if (IS_ERR(srch_ptr)) { ksmbd_debug(SMB, "Search Pattern not found\n"); rc = -EINVAL; goto err_out2; } else { ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr); } if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) { ksmbd_debug(SMB, "Restart directory scan\n"); generic_file_llseek(dir_fp->filp, 0, SEEK_SET); } memset(&d_info, 0, sizeof(struct ksmbd_dir_info)); d_info.wptr = (char *)rsp->Buffer; d_info.rptr = (char *)rsp->Buffer; d_info.out_buf_len = smb2_calc_max_out_buf_len(work, 8, le32_to_cpu(req->OutputBufferLength)); if (d_info.out_buf_len < 0) { rc = -EINVAL; goto err_out; } d_info.flags = srch_flag; /* * reserve dot and dotdot entries in head of buffer * in first response */ rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass, dir_fp, &d_info, srch_ptr, smb2_populate_readdir_entry); if (rc == -ENOSPC) rc = 0; else if (rc) goto err_out; if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES)) d_info.hide_dot_file = true; buffer_sz = d_info.out_buf_len; d_info.rptr = d_info.wptr; query_dir_private.work = work; query_dir_private.search_pattern = srch_ptr; query_dir_private.dir_fp = dir_fp; query_dir_private.d_info = &d_info; query_dir_private.info_level = req->FileInformationClass; dir_fp->readdir_data.private = &query_dir_private; set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir); rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx); /* * req->OutputBufferLength is too small to contain even one entry. * In this case, it immediately returns OutputBufferLength 0 to client. */ if (!d_info.out_buf_len && !d_info.num_entry) goto no_buf_len; if (rc > 0 || rc == -ENOSPC) rc = 0; else if (rc) goto err_out; d_info.wptr = d_info.rptr; d_info.out_buf_len = buffer_sz; rc = process_query_dir_entries(&query_dir_private); if (rc) goto err_out; if (!d_info.data_count && d_info.out_buf_len >= 0) { if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) { rsp->hdr.Status = STATUS_NO_SUCH_FILE; } else { dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0; rsp->hdr.Status = STATUS_NO_MORE_FILES; } rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(0); rsp->OutputBufferLength = cpu_to_le32(0); rsp->Buffer[0] = 0; rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_directory_rsp, Buffer) + 1); if (rc) goto err_out; } else { no_buf_len: ((struct file_directory_info *) ((char *)rsp->Buffer + d_info.last_entry_offset)) ->NextEntryOffset = 0; if (d_info.data_count >= d_info.last_entry_off_align) d_info.data_count -= d_info.last_entry_off_align; rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(72); rsp->OutputBufferLength = cpu_to_le32(d_info.data_count); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_directory_rsp, Buffer) + d_info.data_count); if (rc) goto err_out; } kfree(srch_ptr); ksmbd_fd_put(work, dir_fp); ksmbd_revert_fsids(work); return 0; err_out: pr_err("error while processing smb2 query dir rc = %d\n", rc); kfree(srch_ptr); err_out2: if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_NO_SUCH_FILE; else if (rc == -EBADF) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (rc == -ENOMEM) rsp->hdr.Status = STATUS_NO_MEMORY; else if (rc == -EFAULT) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; else if (rc == -EIO) rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR; if (!rsp->hdr.Status) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; smb2_set_err_rsp(work); ksmbd_fd_put(work, dir_fp); ksmbd_revert_fsids(work); return 0; } /** * buffer_check_err() - helper function to check buffer errors * @reqOutputBufferLength: max buffer length expected in command response * @rsp: query info response buffer contains output buffer length * @rsp_org: base response buffer pointer in case of chained response * * Return: 0 on success, otherwise error */ static int buffer_check_err(int reqOutputBufferLength, struct smb2_query_info_rsp *rsp, void *rsp_org) { if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) { pr_err("Invalid Buffer Size Requested\n"); rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH; *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr)); return -EINVAL; } return 0; } static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_standard_info *sinfo; sinfo = (struct smb2_file_standard_info *)rsp->Buffer; sinfo->AllocationSize = cpu_to_le64(4096); sinfo->EndOfFile = cpu_to_le64(0); sinfo->NumberOfLinks = cpu_to_le32(1); sinfo->DeletePending = 1; sinfo->Directory = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_standard_info)); } static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num, void *rsp_org) { struct smb2_file_internal_info *file_info; file_info = (struct smb2_file_internal_info *)rsp->Buffer; /* any unique number */ file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63)); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_internal_info)); } static int smb2_get_info_file_pipe(struct ksmbd_session *sess, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp, void *rsp_org) { u64 id; int rc; /* * Windows can sometime send query file info request on * pipe without opening it, checking error condition here */ id = req->VolatileFileId; if (!ksmbd_session_rpc_method(sess, id)) return -ENOENT; ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n", req->FileInfoClass, req->VolatileFileId); switch (req->FileInfoClass) { case FILE_STANDARD_INFORMATION: get_standard_info_pipe(rsp, rsp_org); rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), rsp, rsp_org); break; case FILE_INTERNAL_INFORMATION: get_internal_info_pipe(rsp, id, rsp_org); rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), rsp, rsp_org); break; default: ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n", req->FileInfoClass); rc = -EOPNOTSUPP; } return rc; } /** * smb2_get_ea() - handler for smb2 get extended attribute command * @work: smb work containing query info command buffer * @fp: ksmbd_file pointer * @req: get extended attribute request * @rsp: response buffer pointer * @rsp_org: base response buffer pointer in case of chained response * * Return: 0 on success, otherwise error */ static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_ea_info *eainfo, *prev_eainfo; char *name, *ptr, *xattr_list = NULL, *buf; int rc, name_len, value_len, xattr_list_len, idx; ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0; struct smb2_ea_info_req *ea_req = NULL; const struct path *path; struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); if (!(fp->daccess & FILE_READ_EA_LE)) { pr_err("Not permitted to read ext attr : 0x%x\n", fp->daccess); return -EACCES; } path = &fp->filp->f_path; /* single EA entry is requested with given user.* name */ if (req->InputBufferLength) { if (le32_to_cpu(req->InputBufferLength) < sizeof(struct smb2_ea_info_req)) return -EINVAL; ea_req = (struct smb2_ea_info_req *)((char *)req + le16_to_cpu(req->InputBufferOffset)); } else { /* need to send all EAs, if no specific EA is requested*/ if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY) ksmbd_debug(SMB, "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n", le32_to_cpu(req->Flags)); } buf_free_len = smb2_calc_max_out_buf_len(work, 8, le32_to_cpu(req->OutputBufferLength)); if (buf_free_len < 0) return -EINVAL; rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (rc < 0) { rsp->hdr.Status = STATUS_INVALID_HANDLE; goto out; } else if (!rc) { /* there is no EA in the file */ ksmbd_debug(SMB, "no ea data in the file\n"); goto done; } xattr_list_len = rc; ptr = (char *)rsp->Buffer; eainfo = (struct smb2_ea_info *)ptr; prev_eainfo = eainfo; idx = 0; while (idx < xattr_list_len) { name = xattr_list + idx; name_len = strlen(name); ksmbd_debug(SMB, "%s, len %d\n", name, name_len); idx += name_len + 1; /* * CIFS does not support EA other than user.* namespace, * still keep the framework generic, to list other attrs * in future. */ if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) continue; if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN)) continue; if (req->InputBufferLength && strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name, ea_req->EaNameLength)) continue; if (!strncmp(&name[XATTR_USER_PREFIX_LEN], DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN)) continue; if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) name_len -= XATTR_USER_PREFIX_LEN; ptr = eainfo->name + name_len + 1; buf_free_len -= (offsetof(struct smb2_ea_info, name) + name_len + 1); /* bailout if xattr can't fit in buf_free_len */ value_len = ksmbd_vfs_getxattr(idmap, path->dentry, name, &buf); if (value_len <= 0) { rc = -ENOENT; rsp->hdr.Status = STATUS_INVALID_HANDLE; goto out; } buf_free_len -= value_len; if (buf_free_len < 0) { kfree(buf); break; } memcpy(ptr, buf, value_len); kfree(buf); ptr += value_len; eainfo->Flags = 0; eainfo->EaNameLength = name_len; if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN)) memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN], name_len); else memcpy(eainfo->name, name, name_len); eainfo->name[name_len] = '\0'; eainfo->EaValueLength = cpu_to_le16(value_len); next_offset = offsetof(struct smb2_ea_info, name) + name_len + 1 + value_len; /* align next xattr entry at 4 byte bundary */ alignment_bytes = ((next_offset + 3) & ~3) - next_offset; if (alignment_bytes) { memset(ptr, '\0', alignment_bytes); ptr += alignment_bytes; next_offset += alignment_bytes; buf_free_len -= alignment_bytes; } eainfo->NextEntryOffset = cpu_to_le32(next_offset); prev_eainfo = eainfo; eainfo = (struct smb2_ea_info *)ptr; rsp_data_cnt += next_offset; if (req->InputBufferLength) { ksmbd_debug(SMB, "single entry requested\n"); break; } } /* no more ea entries */ prev_eainfo->NextEntryOffset = 0; done: rc = 0; if (rsp_data_cnt == 0) rsp->hdr.Status = STATUS_NO_EAS_ON_FILE; rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt); out: kvfree(xattr_list); return rc; } static void get_file_access_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_access_info *file_info; file_info = (struct smb2_file_access_info *)rsp->Buffer; file_info->AccessFlags = fp->daccess; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_access_info)); } static int get_file_basic_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_basic_info *basic_info; struct kstat stat; u64 time; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; basic_info = (struct smb2_file_basic_info *)rsp->Buffer; basic_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); basic_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); basic_info->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); basic_info->ChangeTime = cpu_to_le64(time); basic_info->Attributes = fp->f_ci->m_fattr; basic_info->Pad1 = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_basic_info)); return 0; } static int get_file_standard_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_standard_info *sinfo; unsigned int delete_pending; struct kstat stat; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; sinfo = (struct smb2_file_standard_info *)rsp->Buffer; delete_pending = ksmbd_inode_pending_delete(fp); sinfo->AllocationSize = cpu_to_le64(stat.blocks << 9); sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); sinfo->DeletePending = delete_pending; sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_standard_info)); return 0; } static void get_file_alignment_info(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_alignment_info *file_info; file_info = (struct smb2_file_alignment_info *)rsp->Buffer; file_info->AlignmentRequirement = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_alignment_info)); } static int get_file_all_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_all_info *file_info; unsigned int delete_pending; struct kstat stat; int conv_len; char *filename; u64 time; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path); if (IS_ERR(filename)) return PTR_ERR(filename); ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; ksmbd_debug(SMB, "filename = %s\n", filename); delete_pending = ksmbd_inode_pending_delete(fp); file_info = (struct smb2_file_all_info *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); file_info->ChangeTime = cpu_to_le64(time); file_info->Attributes = fp->f_ci->m_fattr; file_info->Pad1 = 0; file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); file_info->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending); file_info->DeletePending = delete_pending; file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0; file_info->Pad2 = 0; file_info->IndexNumber = cpu_to_le64(stat.ino); file_info->EASize = 0; file_info->AccessFlags = fp->daccess; file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); file_info->Mode = fp->coption; file_info->AlignmentRequirement = 0; conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename, PATH_MAX, conn->local_nls, 0); conv_len *= 2; file_info->FileNameLength = cpu_to_le32(conv_len); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1); kfree(filename); return 0; } static void get_file_alternate_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_alt_name_info *file_info; struct dentry *dentry = fp->filp->f_path.dentry; int conv_len; spin_lock(&dentry->d_lock); file_info = (struct smb2_file_alt_name_info *)rsp->Buffer; conv_len = ksmbd_extract_shortname(conn, dentry->d_name.name, file_info->FileName); spin_unlock(&dentry->d_lock); file_info->FileNameLength = cpu_to_le32(conv_len); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len); } static int get_file_stream_info(struct ksmbd_work *work, struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct ksmbd_conn *conn = work->conn; struct smb2_file_stream_info *file_info; char *stream_name, *xattr_list = NULL, *stream_buf; struct kstat stat; const struct path *path = &fp->filp->f_path; ssize_t xattr_list_len; int nbytes = 0, streamlen, stream_name_len, next, idx = 0; int buf_free_len; struct smb2_query_info_req *req = ksmbd_req_buf_next(work); int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_stream_info *)rsp->Buffer; buf_free_len = smb2_calc_max_out_buf_len(work, 8, le32_to_cpu(req->OutputBufferLength)); if (buf_free_len < 0) goto out; xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list); if (xattr_list_len < 0) { goto out; } else if (!xattr_list_len) { ksmbd_debug(SMB, "empty xattr in the file\n"); goto out; } while (idx < xattr_list_len) { stream_name = xattr_list + idx; streamlen = strlen(stream_name); idx += streamlen + 1; ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen); if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX, STREAM_PREFIX_LEN)) continue; stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN + STREAM_PREFIX_LEN); streamlen = stream_name_len; /* plus : size */ streamlen += 1; stream_buf = kmalloc(streamlen + 1, GFP_KERNEL); if (!stream_buf) break; streamlen = snprintf(stream_buf, streamlen + 1, ":%s", &stream_name[XATTR_NAME_STREAM_LEN]); next = sizeof(struct smb2_file_stream_info) + streamlen * 2; if (next > buf_free_len) { kfree(stream_buf); break; } file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes]; streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, stream_buf, streamlen, conn->local_nls, 0); streamlen *= 2; kfree(stream_buf); file_info->StreamNameLength = cpu_to_le32(streamlen); file_info->StreamSize = cpu_to_le64(stream_name_len); file_info->StreamAllocationSize = cpu_to_le64(stream_name_len); nbytes += next; buf_free_len -= next; file_info->NextEntryOffset = cpu_to_le32(next); } out: if (!S_ISDIR(stat.mode) && buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) { file_info = (struct smb2_file_stream_info *) &rsp->Buffer[nbytes]; streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName, "::$DATA", 7, conn->local_nls, 0); streamlen *= 2; file_info->StreamNameLength = cpu_to_le32(streamlen); file_info->StreamSize = cpu_to_le64(stat.size); file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9); nbytes += sizeof(struct smb2_file_stream_info) + streamlen; } /* last entry offset should be 0 */ file_info->NextEntryOffset = 0; kvfree(xattr_list); rsp->OutputBufferLength = cpu_to_le32(nbytes); return 0; } static int get_file_internal_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_internal_info *file_info; struct kstat stat; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_internal_info *)rsp->Buffer; file_info->IndexNumber = cpu_to_le64(stat.ino); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_internal_info)); return 0; } static int get_file_network_open_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_ntwrk_info *file_info; struct kstat stat; u64 time; int ret; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); file_info->ChangeTime = cpu_to_le64(time); file_info->Attributes = fp->f_ci->m_fattr; file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size); file_info->Reserved = cpu_to_le32(0); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_ntwrk_info)); return 0; } static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org) { struct smb2_file_ea_info *file_info; file_info = (struct smb2_file_ea_info *)rsp->Buffer; file_info->EASize = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_ea_info)); } static void get_file_position_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_pos_info *file_info; file_info = (struct smb2_file_pos_info *)rsp->Buffer; file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_pos_info)); } static void get_file_mode_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_mode_info *file_info; file_info = (struct smb2_file_mode_info *)rsp->Buffer; file_info->Mode = fp->coption & FILE_MODE_INFO_MASK; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_mode_info)); } static int get_file_compression_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_comp_info *file_info; struct kstat stat; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb2_file_comp_info *)rsp->Buffer; file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9); file_info->CompressionFormat = COMPRESSION_FORMAT_NONE; file_info->CompressionUnitShift = 0; file_info->ChunkShift = 0; file_info->ClusterShift = 0; memset(&file_info->Reserved[0], 0, 3); rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_comp_info)); return 0; } static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb2_file_attr_tag_info *file_info; if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) { pr_err("no right to read the attributes : 0x%x\n", fp->daccess); return -EACCES; } file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer; file_info->FileAttributes = fp->f_ci->m_fattr; file_info->ReparseTag = 0; rsp->OutputBufferLength = cpu_to_le32(sizeof(struct smb2_file_attr_tag_info)); return 0; } static int find_file_posix_info(struct smb2_query_info_rsp *rsp, struct ksmbd_file *fp, void *rsp_org) { struct smb311_posix_qinfo *file_info; struct inode *inode = file_inode(fp->filp); struct mnt_idmap *idmap = file_mnt_idmap(fp->filp); vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode); vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode); struct kstat stat; u64 time; int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32; int ret; ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) return ret; file_info = (struct smb311_posix_qinfo *)rsp->Buffer; file_info->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); file_info->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); file_info->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); file_info->ChangeTime = cpu_to_le64(time); file_info->DosAttributes = fp->f_ci->m_fattr; file_info->Inode = cpu_to_le64(stat.ino); file_info->EndOfFile = cpu_to_le64(stat.size); file_info->AllocationSize = cpu_to_le64(stat.blocks << 9); file_info->HardLinks = cpu_to_le32(stat.nlink); file_info->Mode = cpu_to_le32(stat.mode & 0777); file_info->DeviceId = cpu_to_le32(stat.rdev); /* * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)). * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) + * sub_auth(4 * 1(num_subauth)) + RID(4). */ id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)), SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]); id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)), SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]); rsp->OutputBufferLength = cpu_to_le32(out_buf_len); return 0; } static int smb2_get_info_file(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_file *fp; int fileinfoclass = 0; int rc = 0; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { /* smb2 info file called for pipe */ return smb2_get_info_file_pipe(work->sess, req, rsp, work->response_buf); } if (work->next_smb2_rcv_hdr_off) { if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) return -ENOENT; fileinfoclass = req->FileInfoClass; switch (fileinfoclass) { case FILE_ACCESS_INFORMATION: get_file_access_info(rsp, fp, work->response_buf); break; case FILE_BASIC_INFORMATION: rc = get_file_basic_info(rsp, fp, work->response_buf); break; case FILE_STANDARD_INFORMATION: rc = get_file_standard_info(rsp, fp, work->response_buf); break; case FILE_ALIGNMENT_INFORMATION: get_file_alignment_info(rsp, work->response_buf); break; case FILE_ALL_INFORMATION: rc = get_file_all_info(work, rsp, fp, work->response_buf); break; case FILE_ALTERNATE_NAME_INFORMATION: get_file_alternate_info(work, rsp, fp, work->response_buf); break; case FILE_STREAM_INFORMATION: rc = get_file_stream_info(work, rsp, fp, work->response_buf); break; case FILE_INTERNAL_INFORMATION: rc = get_file_internal_info(rsp, fp, work->response_buf); break; case FILE_NETWORK_OPEN_INFORMATION: rc = get_file_network_open_info(rsp, fp, work->response_buf); break; case FILE_EA_INFORMATION: get_file_ea_info(rsp, work->response_buf); break; case FILE_FULL_EA_INFORMATION: rc = smb2_get_ea(work, fp, req, rsp, work->response_buf); break; case FILE_POSITION_INFORMATION: get_file_position_info(rsp, fp, work->response_buf); break; case FILE_MODE_INFORMATION: get_file_mode_info(rsp, fp, work->response_buf); break; case FILE_COMPRESSION_INFORMATION: rc = get_file_compression_info(rsp, fp, work->response_buf); break; case FILE_ATTRIBUTE_TAG_INFORMATION: rc = get_file_attribute_tag_info(rsp, fp, work->response_buf); break; case SMB_FIND_FILE_POSIX_INFO: if (!work->tcon->posix_extensions) { pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); rc = -EOPNOTSUPP; } else { rc = find_file_posix_info(rsp, fp, work->response_buf); } break; default: ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n", fileinfoclass); rc = -EOPNOTSUPP; } if (!rc) rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), rsp, work->response_buf); ksmbd_fd_put(work, fp); return rc; } static int smb2_get_info_filesystem(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_session *sess = work->sess; struct ksmbd_conn *conn = work->conn; struct ksmbd_share_config *share = work->tcon->share_conf; int fsinfoclass = 0; struct kstatfs stfs; struct path path; int rc = 0, len; if (!share->path) return -EIO; rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path); if (rc) { pr_err("cannot create vfs path\n"); return -EIO; } rc = vfs_statfs(&path, &stfs); if (rc) { pr_err("cannot do stat of path %s\n", share->path); path_put(&path); return -EIO; } fsinfoclass = req->FileInfoClass; switch (fsinfoclass) { case FS_DEVICE_INFORMATION: { struct filesystem_device_info *info; info = (struct filesystem_device_info *)rsp->Buffer; info->DeviceType = cpu_to_le32(FILE_DEVICE_DISK); info->DeviceCharacteristics = cpu_to_le32(FILE_DEVICE_IS_MOUNTED); if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) info->DeviceCharacteristics |= cpu_to_le32(FILE_READ_ONLY_DEVICE); rsp->OutputBufferLength = cpu_to_le32(8); break; } case FS_ATTRIBUTE_INFORMATION: { struct filesystem_attribute_info *info; size_t sz; info = (struct filesystem_attribute_info *)rsp->Buffer; info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS | FILE_PERSISTENT_ACLS | FILE_UNICODE_ON_DISK | FILE_CASE_PRESERVED_NAMES | FILE_CASE_SENSITIVE_SEARCH | FILE_SUPPORTS_BLOCK_REFCOUNTING); info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_STREAMS)) info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS); info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen); len = smbConvertToUTF16((__le16 *)info->FileSystemName, "NTFS", PATH_MAX, conn->local_nls, 0); len = len * 2; info->FileSystemNameLen = cpu_to_le32(len); sz = sizeof(struct filesystem_attribute_info) + len; rsp->OutputBufferLength = cpu_to_le32(sz); break; } case FS_VOLUME_INFORMATION: { struct filesystem_vol_info *info; size_t sz; unsigned int serial_crc = 0; info = (struct filesystem_vol_info *)(rsp->Buffer); info->VolumeCreationTime = 0; serial_crc = crc32_le(serial_crc, share->name, strlen(share->name)); serial_crc = crc32_le(serial_crc, share->path, strlen(share->path)); serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(), strlen(ksmbd_netbios_name())); /* Taking dummy value of serial number*/ info->SerialNumber = cpu_to_le32(serial_crc); len = smbConvertToUTF16((__le16 *)info->VolumeLabel, share->name, PATH_MAX, conn->local_nls, 0); len = len * 2; info->VolumeLabelSize = cpu_to_le32(len); info->Reserved = 0; sz = sizeof(struct filesystem_vol_info) + len; rsp->OutputBufferLength = cpu_to_le32(sz); break; } case FS_SIZE_INFORMATION: { struct filesystem_info *info; info = (struct filesystem_info *)(rsp->Buffer); info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree); info->SectorsPerAllocationUnit = cpu_to_le32(1); info->BytesPerSector = cpu_to_le32(stfs.f_bsize); rsp->OutputBufferLength = cpu_to_le32(24); break; } case FS_FULL_SIZE_INFORMATION: { struct smb2_fs_full_size_info *info; info = (struct smb2_fs_full_size_info *)(rsp->Buffer); info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks); info->CallerAvailableAllocationUnits = cpu_to_le64(stfs.f_bavail); info->ActualAvailableAllocationUnits = cpu_to_le64(stfs.f_bfree); info->SectorsPerAllocationUnit = cpu_to_le32(1); info->BytesPerSector = cpu_to_le32(stfs.f_bsize); rsp->OutputBufferLength = cpu_to_le32(32); break; } case FS_OBJECT_ID_INFORMATION: { struct object_id_info *info; info = (struct object_id_info *)(rsp->Buffer); if (!user_guest(sess->user)) memcpy(info->objid, user_passkey(sess->user), 16); else memset(info->objid, 0, 16); info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC); info->extended_info.version = cpu_to_le32(1); info->extended_info.release = cpu_to_le32(1); info->extended_info.rel_date = 0; memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0")); rsp->OutputBufferLength = cpu_to_le32(64); break; } case FS_SECTOR_SIZE_INFORMATION: { struct smb3_fs_ss_info *info; unsigned int sector_size = min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096); info = (struct smb3_fs_ss_info *)(rsp->Buffer); info->LogicalBytesPerSector = cpu_to_le32(sector_size); info->PhysicalBytesPerSectorForAtomicity = cpu_to_le32(sector_size); info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size); info->FSEffPhysicalBytesPerSectorForAtomicity = cpu_to_le32(sector_size); info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE | SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE); info->ByteOffsetForSectorAlignment = 0; info->ByteOffsetForPartitionAlignment = 0; rsp->OutputBufferLength = cpu_to_le32(28); break; } case FS_CONTROL_INFORMATION: { /* * TODO : The current implementation is based on * test result with win7(NTFS) server. It's need to * modify this to get valid Quota values * from Linux kernel */ struct smb2_fs_control_info *info; info = (struct smb2_fs_control_info *)(rsp->Buffer); info->FreeSpaceStartFiltering = 0; info->FreeSpaceThreshold = 0; info->FreeSpaceStopFiltering = 0; info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID); info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID); info->Padding = 0; rsp->OutputBufferLength = cpu_to_le32(48); break; } case FS_POSIX_INFORMATION: { struct filesystem_posix_info *info; if (!work->tcon->posix_extensions) { pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n"); rc = -EOPNOTSUPP; } else { info = (struct filesystem_posix_info *)(rsp->Buffer); info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize); info->BlockSize = cpu_to_le32(stfs.f_bsize); info->TotalBlocks = cpu_to_le64(stfs.f_blocks); info->BlocksAvail = cpu_to_le64(stfs.f_bfree); info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail); info->TotalFileNodes = cpu_to_le64(stfs.f_files); info->FreeFileNodes = cpu_to_le64(stfs.f_ffree); rsp->OutputBufferLength = cpu_to_le32(56); } break; } default: path_put(&path); return -EOPNOTSUPP; } rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength), rsp, work->response_buf); path_put(&path); return rc; } static int smb2_get_info_sec(struct ksmbd_work *work, struct smb2_query_info_req *req, struct smb2_query_info_rsp *rsp) { struct ksmbd_file *fp; struct mnt_idmap *idmap; struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL; struct smb_fattr fattr = {{0}}; struct inode *inode; __u32 secdesclen = 0; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; int addition_info = le32_to_cpu(req->AdditionalInformation); int rc = 0, ppntsd_size = 0; if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO | PROTECTED_DACL_SECINFO | UNPROTECTED_DACL_SECINFO)) { ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n", addition_info); pntsd->revision = cpu_to_le16(1); pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED); pntsd->osidoffset = 0; pntsd->gsidoffset = 0; pntsd->sacloffset = 0; pntsd->dacloffset = 0; secdesclen = sizeof(struct smb_ntsd); rsp->OutputBufferLength = cpu_to_le32(secdesclen); return 0; } if (work->next_smb2_rcv_hdr_off) { if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) return -ENOENT; idmap = file_mnt_idmap(fp->filp); inode = file_inode(fp->filp); ksmbd_acls_fattr(&fattr, idmap, inode); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap, fp->filp->f_path.dentry, &ppntsd); /* Check if sd buffer size exceeds response buffer size */ if (smb2_resp_buf_len(work, 8) > ppntsd_size) rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size, addition_info, &secdesclen, &fattr); posix_acl_release(fattr.cf_acls); posix_acl_release(fattr.cf_dacls); kfree(ppntsd); ksmbd_fd_put(work, fp); if (rc) return rc; rsp->OutputBufferLength = cpu_to_le32(secdesclen); return 0; } /** * smb2_query_info() - handler for smb2 query info command * @work: smb work containing query info request buffer * * Return: 0 on success, otherwise error */ int smb2_query_info(struct ksmbd_work *work) { struct smb2_query_info_req *req; struct smb2_query_info_rsp *rsp; int rc = 0; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "GOT query info request\n"); if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out; } switch (req->InfoType) { case SMB2_O_INFO_FILE: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); rc = smb2_get_info_file(work, req, rsp); break; case SMB2_O_INFO_FILESYSTEM: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n"); rc = smb2_get_info_filesystem(work, req, rsp); break; case SMB2_O_INFO_SECURITY: ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); rc = smb2_get_info_sec(work, req, rsp); break; default: ksmbd_debug(SMB, "InfoType %d not supported yet\n", req->InfoType); rc = -EOPNOTSUPP; } ksmbd_revert_fsids(work); if (!rc) { rsp->StructureSize = cpu_to_le16(9); rsp->OutputBufferOffset = cpu_to_le16(72); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_query_info_rsp, Buffer) + le32_to_cpu(rsp->OutputBufferLength)); } err_out: if (rc < 0) { if (rc == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (rc == -EIO) rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; else if (rc == -ENOMEM) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; smb2_set_err_rsp(work); ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); return rc; } return 0; } /** * smb2_close_pipe() - handler for closing IPC pipe * @work: smb work containing close request buffer * * Return: 0 */ static noinline int smb2_close_pipe(struct ksmbd_work *work) { u64 id; struct smb2_close_req *req; struct smb2_close_rsp *rsp; WORK_BUFFERS(work, req, rsp); id = req->VolatileFileId; ksmbd_session_rpc_close(work->sess, id); rsp->StructureSize = cpu_to_le16(60); rsp->Flags = 0; rsp->Reserved = 0; rsp->CreationTime = 0; rsp->LastAccessTime = 0; rsp->LastWriteTime = 0; rsp->ChangeTime = 0; rsp->AllocationSize = 0; rsp->EndOfFile = 0; rsp->Attributes = 0; return ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_close_rsp)); } /** * smb2_close() - handler for smb2 close file command * @work: smb work containing close request buffer * * Return: 0 */ int smb2_close(struct ksmbd_work *work) { u64 volatile_id = KSMBD_NO_FID; u64 sess_id; struct smb2_close_req *req; struct smb2_close_rsp *rsp; struct ksmbd_conn *conn = work->conn; struct ksmbd_file *fp; u64 time; int err = 0; WORK_BUFFERS(work, req, rsp); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe close request\n"); return smb2_close_pipe(work); } sess_id = le64_to_cpu(req->hdr.SessionId); if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) sess_id = work->compound_sid; work->compound_sid = 0; if (check_session_id(conn, sess_id)) { work->compound_sid = sess_id; } else { rsp->hdr.Status = STATUS_USER_SESSION_DELETED; if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS) rsp->hdr.Status = STATUS_INVALID_PARAMETER; err = -EBADF; goto out; } if (work->next_smb2_rcv_hdr_off && !has_file_id(req->VolatileFileId)) { if (!has_file_id(work->compound_fid)) { /* file already closed, return FILE_CLOSED */ ksmbd_debug(SMB, "file already closed\n"); rsp->hdr.Status = STATUS_FILE_CLOSED; err = -EBADF; goto out; } else { ksmbd_debug(SMB, "Compound request set FID = %llu:%llu\n", work->compound_fid, work->compound_pfid); volatile_id = work->compound_fid; /* file closed, stored id is not valid anymore */ work->compound_fid = KSMBD_NO_FID; work->compound_pfid = KSMBD_NO_FID; } } else { volatile_id = req->VolatileFileId; } ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id); rsp->StructureSize = cpu_to_le16(60); rsp->Reserved = 0; if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) { struct kstat stat; int ret; fp = ksmbd_lookup_fd_fast(work, volatile_id); if (!fp) { err = -ENOENT; goto out; } ret = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (ret) { ksmbd_fd_put(work, fp); goto out; } rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB; rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.blocks << 9); rsp->EndOfFile = cpu_to_le64(stat.size); rsp->Attributes = fp->f_ci->m_fattr; rsp->CreationTime = cpu_to_le64(fp->create_time); time = ksmbd_UnixTimeToNT(stat.atime); rsp->LastAccessTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.mtime); rsp->LastWriteTime = cpu_to_le64(time); time = ksmbd_UnixTimeToNT(stat.ctime); rsp->ChangeTime = cpu_to_le64(time); ksmbd_fd_put(work, fp); } else { rsp->Flags = 0; rsp->AllocationSize = 0; rsp->EndOfFile = 0; rsp->Attributes = 0; rsp->CreationTime = 0; rsp->LastAccessTime = 0; rsp->LastWriteTime = 0; rsp->ChangeTime = 0; } err = ksmbd_close_fd(work, volatile_id); out: if (!err) err = ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_close_rsp)); if (err) { if (rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); } return err; } /** * smb2_echo() - handler for smb2 echo(ping) command * @work: smb work containing echo request buffer * * Return: 0 */ int smb2_echo(struct ksmbd_work *work) { struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf); if (work->next_smb2_rcv_hdr_off) rsp = ksmbd_resp_buf_next(work); rsp->StructureSize = cpu_to_le16(4); rsp->Reserved = 0; return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp)); } static int smb2_rename(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_rename_info *file_info, struct nls_table *local_nls) { struct ksmbd_share_config *share = fp->tcon->share_conf; char *new_name = NULL; int rc, flags = 0; ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n"); new_name = smb2_get_name(file_info->FileName, le32_to_cpu(file_info->FileNameLength), local_nls); if (IS_ERR(new_name)) return PTR_ERR(new_name); if (strchr(new_name, ':')) { int s_type; char *xattr_stream_name, *stream_name = NULL; size_t xattr_stream_size; int len; rc = parse_stream_name(new_name, &stream_name, &s_type); if (rc < 0) goto out; len = strlen(new_name); if (len > 0 && new_name[len - 1] != '/') { pr_err("not allow base filename in rename\n"); rc = -ESHARE; goto out; } rc = ksmbd_vfs_xattr_stream_name(stream_name, &xattr_stream_name, &xattr_stream_size, s_type); if (rc) goto out; rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp), &fp->filp->f_path, xattr_stream_name, NULL, 0, 0, true); if (rc < 0) { pr_err("failed to store stream name in xattr: %d\n", rc); rc = -EINVAL; goto out; } goto out; } ksmbd_debug(SMB, "new name %s\n", new_name); if (ksmbd_share_veto_filename(share, new_name)) { rc = -ENOENT; ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name); goto out; } if (!file_info->ReplaceIfExists) flags = RENAME_NOREPLACE; rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags); if (!rc) smb_break_all_levII_oplock(work, fp, 0); out: kfree(new_name); return rc; } static int smb2_create_link(struct ksmbd_work *work, struct ksmbd_share_config *share, struct smb2_file_link_info *file_info, unsigned int buf_len, struct file *filp, struct nls_table *local_nls) { char *link_name = NULL, *target_name = NULL, *pathname = NULL; struct path path, parent_path; bool file_present = false; int rc; if (buf_len < (u64)sizeof(struct smb2_file_link_info) + le32_to_cpu(file_info->FileNameLength)) return -EINVAL; ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n"); pathname = kmalloc(PATH_MAX, GFP_KERNEL); if (!pathname) return -ENOMEM; link_name = smb2_get_name(file_info->FileName, le32_to_cpu(file_info->FileNameLength), local_nls); if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) { rc = -EINVAL; goto out; } ksmbd_debug(SMB, "link name is %s\n", link_name); target_name = file_path(filp, pathname, PATH_MAX); if (IS_ERR(target_name)) { rc = -EINVAL; goto out; } ksmbd_debug(SMB, "target name is %s\n", target_name); rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS, &parent_path, &path, 0); if (rc) { if (rc != -ENOENT) goto out; } else file_present = true; if (file_info->ReplaceIfExists) { if (file_present) { rc = ksmbd_vfs_remove_file(work, &path); if (rc) { rc = -EINVAL; ksmbd_debug(SMB, "cannot delete %s\n", link_name); goto out; } } } else { if (file_present) { rc = -EEXIST; ksmbd_debug(SMB, "link already exists\n"); goto out; } } rc = ksmbd_vfs_link(work, target_name, link_name); if (rc) rc = -EINVAL; out: if (file_present) ksmbd_vfs_kern_path_unlock(&parent_path, &path); if (!IS_ERR(link_name)) kfree(link_name); kfree(pathname); return rc; } static int set_file_basic_info(struct ksmbd_file *fp, struct smb2_file_basic_info *file_info, struct ksmbd_share_config *share) { struct iattr attrs; struct file *filp; struct inode *inode; struct mnt_idmap *idmap; int rc = 0; if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE)) return -EACCES; attrs.ia_valid = 0; filp = fp->filp; inode = file_inode(filp); idmap = file_mnt_idmap(filp); if (file_info->CreationTime) fp->create_time = le64_to_cpu(file_info->CreationTime); if (file_info->LastAccessTime) { attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime); attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET); } attrs.ia_valid |= ATTR_CTIME; if (file_info->ChangeTime) attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime); else attrs.ia_ctime = inode_get_ctime(inode); if (file_info->LastWriteTime) { attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime); attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET); } if (file_info->Attributes) { if (!S_ISDIR(inode->i_mode) && file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) { pr_err("can't change a file to a directory\n"); return -EINVAL; } if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE)) fp->f_ci->m_fattr = file_info->Attributes | (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE); } if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) && (file_info->CreationTime || file_info->Attributes)) { struct xattr_dos_attrib da = {0}; da.version = 4; da.itime = fp->itime; da.create_time = fp->create_time; da.attr = le32_to_cpu(fp->f_ci->m_fattr); da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME | XATTR_DOSINFO_ITIME; rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da, true); if (rc) ksmbd_debug(SMB, "failed to restore file attribute in EA\n"); rc = 0; } if (attrs.ia_valid) { struct dentry *dentry = filp->f_path.dentry; struct inode *inode = d_inode(dentry); if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) return -EACCES; inode_lock(inode); inode_set_ctime_to_ts(inode, attrs.ia_ctime); attrs.ia_valid &= ~ATTR_CTIME; rc = notify_change(idmap, dentry, &attrs, NULL); inode_unlock(inode); } return rc; } static int set_file_allocation_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_alloc_info *file_alloc_info) { /* * TODO : It's working fine only when store dos attributes * is not yes. need to implement a logic which works * properly with any smb.conf option */ loff_t alloc_blks; struct inode *inode; struct kstat stat; int rc; if (!(fp->daccess & FILE_WRITE_DATA_LE)) return -EACCES; rc = vfs_getattr(&fp->filp->f_path, &stat, STATX_BASIC_STATS, AT_STATX_SYNC_AS_STAT); if (rc) return rc; alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9; inode = file_inode(fp->filp); if (alloc_blks > stat.blocks) { smb_break_all_levII_oplock(work, fp, 1); rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0, alloc_blks * 512); if (rc && rc != -EOPNOTSUPP) { pr_err("vfs_fallocate is failed : %d\n", rc); return rc; } } else if (alloc_blks < stat.blocks) { loff_t size; /* * Allocation size could be smaller than original one * which means allocated blocks in file should be * deallocated. use truncate to cut out it, but inode * size is also updated with truncate offset. * inode size is retained by backup inode size. */ size = i_size_read(inode); rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512); if (rc) { pr_err("truncate failed!, err %d\n", rc); return rc; } if (size < alloc_blks * 512) i_size_write(inode, size); } return 0; } static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_eof_info *file_eof_info) { loff_t newsize; struct inode *inode; int rc; if (!(fp->daccess & FILE_WRITE_DATA_LE)) return -EACCES; newsize = le64_to_cpu(file_eof_info->EndOfFile); inode = file_inode(fp->filp); /* * If FILE_END_OF_FILE_INFORMATION of set_info_file is called * on FAT32 shared device, truncate execution time is too long * and network error could cause from windows client. because * truncate of some filesystem like FAT32 fill zero data in * truncated range. */ if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) { ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize); rc = ksmbd_vfs_truncate(work, fp, newsize); if (rc) { ksmbd_debug(SMB, "truncate failed!, err %d\n", rc); if (rc != -EAGAIN) rc = -EBADF; return rc; } } return 0; } static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_file_rename_info *rename_info, unsigned int buf_len) { if (!(fp->daccess & FILE_DELETE_LE)) { pr_err("no right to delete : 0x%x\n", fp->daccess); return -EACCES; } if (buf_len < (u64)sizeof(struct smb2_file_rename_info) + le32_to_cpu(rename_info->FileNameLength)) return -EINVAL; if (!le32_to_cpu(rename_info->FileNameLength)) return -EINVAL; return smb2_rename(work, fp, rename_info, work->conn->local_nls); } static int set_file_disposition_info(struct ksmbd_file *fp, struct smb2_file_disposition_info *file_info) { struct inode *inode; if (!(fp->daccess & FILE_DELETE_LE)) { pr_err("no right to delete : 0x%x\n", fp->daccess); return -EACCES; } inode = file_inode(fp->filp); if (file_info->DeletePending) { if (S_ISDIR(inode->i_mode) && ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY) return -EBUSY; ksmbd_set_inode_pending_delete(fp); } else { ksmbd_clear_inode_pending_delete(fp); } return 0; } static int set_file_position_info(struct ksmbd_file *fp, struct smb2_file_pos_info *file_info) { loff_t current_byte_offset; unsigned long sector_size; struct inode *inode; inode = file_inode(fp->filp); current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset); sector_size = inode->i_sb->s_blocksize; if (current_byte_offset < 0 || (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE && current_byte_offset & (sector_size - 1))) { pr_err("CurrentByteOffset is not valid : %llu\n", current_byte_offset); return -EINVAL; } fp->filp->f_pos = current_byte_offset; return 0; } static int set_file_mode_info(struct ksmbd_file *fp, struct smb2_file_mode_info *file_info) { __le32 mode; mode = file_info->Mode; if ((mode & ~FILE_MODE_INFO_MASK)) { pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode)); return -EINVAL; } /* * TODO : need to implement consideration for * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT */ ksmbd_vfs_set_fadvise(fp->filp, mode); fp->coption = mode; return 0; } /** * smb2_set_info_file() - handler for smb2 set info command * @work: smb work containing set info command buffer * @fp: ksmbd_file pointer * @req: request buffer pointer * @share: ksmbd_share_config pointer * * Return: 0 on success, otherwise error * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH */ static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp, struct smb2_set_info_req *req, struct ksmbd_share_config *share) { unsigned int buf_len = le32_to_cpu(req->BufferLength); char *buffer = (char *)req + le16_to_cpu(req->BufferOffset); switch (req->FileInfoClass) { case FILE_BASIC_INFORMATION: { if (buf_len < sizeof(struct smb2_file_basic_info)) return -EINVAL; return set_file_basic_info(fp, (struct smb2_file_basic_info *)buffer, share); } case FILE_ALLOCATION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_alloc_info)) return -EINVAL; return set_file_allocation_info(work, fp, (struct smb2_file_alloc_info *)buffer); } case FILE_END_OF_FILE_INFORMATION: { if (buf_len < sizeof(struct smb2_file_eof_info)) return -EINVAL; return set_end_of_file_info(work, fp, (struct smb2_file_eof_info *)buffer); } case FILE_RENAME_INFORMATION: { if (buf_len < sizeof(struct smb2_file_rename_info)) return -EINVAL; return set_rename_info(work, fp, (struct smb2_file_rename_info *)buffer, buf_len); } case FILE_LINK_INFORMATION: { if (buf_len < sizeof(struct smb2_file_link_info)) return -EINVAL; return smb2_create_link(work, work->tcon->share_conf, (struct smb2_file_link_info *)buffer, buf_len, fp->filp, work->conn->local_nls); } case FILE_DISPOSITION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_disposition_info)) return -EINVAL; return set_file_disposition_info(fp, (struct smb2_file_disposition_info *)buffer); } case FILE_FULL_EA_INFORMATION: { if (!(fp->daccess & FILE_WRITE_EA_LE)) { pr_err("Not permitted to write ext attr: 0x%x\n", fp->daccess); return -EACCES; } if (buf_len < sizeof(struct smb2_ea_info)) return -EINVAL; return smb2_set_ea((struct smb2_ea_info *)buffer, buf_len, &fp->filp->f_path, true); } case FILE_POSITION_INFORMATION: { if (buf_len < sizeof(struct smb2_file_pos_info)) return -EINVAL; return set_file_position_info(fp, (struct smb2_file_pos_info *)buffer); } case FILE_MODE_INFORMATION: { if (buf_len < sizeof(struct smb2_file_mode_info)) return -EINVAL; return set_file_mode_info(fp, (struct smb2_file_mode_info *)buffer); } } pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass); return -EOPNOTSUPP; } static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info, char *buffer, int buf_len) { struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer; fp->saccess |= FILE_SHARE_DELETE_LE; return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd, buf_len, false, true); } /** * smb2_set_info() - handler for smb2 set info command handler * @work: smb work containing set info request buffer * * Return: 0 on success, otherwise error */ int smb2_set_info(struct ksmbd_work *work) { struct smb2_set_info_req *req; struct smb2_set_info_rsp *rsp; struct ksmbd_file *fp = NULL; int rc = 0; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; ksmbd_debug(SMB, "Received set info request\n"); if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } else { req = smb2_get_msg(work->request_buf); rsp = smb2_get_msg(work->response_buf); } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); pr_err("User does not have write permission\n"); rc = -EACCES; goto err_out; } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { ksmbd_debug(SMB, "Invalid id for close: %u\n", id); rc = -ENOENT; goto err_out; } switch (req->InfoType) { case SMB2_O_INFO_FILE: ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n"); rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf); break; case SMB2_O_INFO_SECURITY: ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n"); if (ksmbd_override_fsids(work)) { rc = -ENOMEM; goto err_out; } rc = smb2_set_info_sec(fp, le32_to_cpu(req->AdditionalInformation), (char *)req + le16_to_cpu(req->BufferOffset), le32_to_cpu(req->BufferLength)); ksmbd_revert_fsids(work); break; default: rc = -EOPNOTSUPP; } if (rc < 0) goto err_out; rsp->StructureSize = cpu_to_le16(2); rc = ksmbd_iov_pin_rsp(work, (void *)rsp, sizeof(struct smb2_set_info_rsp)); if (rc) goto err_out; ksmbd_fd_put(work, fp); return 0; err_out: if (rc == -EACCES || rc == -EPERM || rc == -EXDEV) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (rc == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (rc == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (rc == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID; else if (rc == -EBUSY || rc == -ENOTEMPTY) rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY; else if (rc == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (rc == -EBADF || rc == -ESTALE) rsp->hdr.Status = STATUS_INVALID_HANDLE; else if (rc == -EEXIST) rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION; else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP) rsp->hdr.Status = STATUS_INVALID_INFO_CLASS; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc); return rc; } /** * smb2_read_pipe() - handler for smb2 read from IPC pipe * @work: smb work containing read IPC pipe command buffer * * Return: 0 on success, otherwise error */ static noinline int smb2_read_pipe(struct ksmbd_work *work) { int nbytes = 0, err; u64 id; struct ksmbd_rpc_command *rpc_resp; struct smb2_read_req *req; struct smb2_read_rsp *rsp; WORK_BUFFERS(work, req, rsp); id = req->VolatileFileId; rpc_resp = ksmbd_rpc_read(work->sess, id); if (rpc_resp) { void *aux_payload_buf; if (rpc_resp->flags != KSMBD_RPC_OK) { err = -EINVAL; goto out; } aux_payload_buf = kvmalloc(rpc_resp->payload_sz, GFP_KERNEL); if (!aux_payload_buf) { err = -ENOMEM; goto out; } memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz); nbytes = rpc_resp->payload_sz; err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer), aux_payload_buf, nbytes); if (err) { kvfree(aux_payload_buf); goto out; } kvfree(rpc_resp); } else { err = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer)); if (err) goto out; } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 80; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(nbytes); rsp->DataRemaining = 0; rsp->Flags = 0; return 0; out: rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; smb2_set_err_rsp(work); kvfree(rpc_resp); return err; } static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work, struct smb2_buffer_desc_v1 *desc, __le32 Channel, __le16 ChannelInfoLength) { unsigned int i, ch_count; if (work->conn->dialect == SMB30_PROT_ID && Channel != SMB2_CHANNEL_RDMA_V1) return -EINVAL; ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc); if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) { for (i = 0; i < ch_count; i++) { pr_info("RDMA r/w request %#x: token %#x, length %#x\n", i, le32_to_cpu(desc[i].token), le32_to_cpu(desc[i].length)); } } if (!ch_count) return -EINVAL; work->need_invalidate_rkey = (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE); if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) work->remote_key = le32_to_cpu(desc->token); return 0; } static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work, struct smb2_read_req *req, void *data_buf, size_t length) { int err; err = ksmbd_conn_rdma_write(work->conn, data_buf, length, (struct smb2_buffer_desc_v1 *) ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)), le16_to_cpu(req->ReadChannelInfoLength)); if (err) return err; return length; } /** * smb2_read() - handler for smb2 read from file * @work: smb work containing read command buffer * * Return: 0 on success, otherwise error */ int smb2_read(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_read_req *req; struct smb2_read_rsp *rsp; struct ksmbd_file *fp = NULL; loff_t offset; size_t length, mincount; ssize_t nbytes = 0, remain_bytes = 0; int err = 0; bool is_rdma_channel = false; unsigned int max_read_size = conn->vals->max_read_size; unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID; void *aux_payload_buf; if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe read request\n"); return smb2_read_pipe(work); } if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; pid = work->compound_pfid; } } else { req = smb2_get_msg(work->request_buf); rsp = smb2_get_msg(work->response_buf); } if (!has_file_id(id)) { id = req->VolatileFileId; pid = req->PersistentFileId; } if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE || req->Channel == SMB2_CHANNEL_RDMA_V1) { is_rdma_channel = true; max_read_size = get_smbd_max_read_write_size(); } if (is_rdma_channel == true) { unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset); if (ch_offset < offsetof(struct smb2_read_req, Buffer)) { err = -EINVAL; goto out; } err = smb2_set_remote_key_for_rdma(work, (struct smb2_buffer_desc_v1 *) ((char *)req + ch_offset), req->Channel, req->ReadChannelInfoLength); if (err) goto out; } fp = ksmbd_lookup_fd_slow(work, id, pid); if (!fp) { err = -ENOENT; goto out; } if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { pr_err("Not permitted to read : 0x%x\n", fp->daccess); err = -EACCES; goto out; } offset = le64_to_cpu(req->Offset); length = le32_to_cpu(req->Length); mincount = le32_to_cpu(req->MinimumCount); if (length > max_read_size) { ksmbd_debug(SMB, "limiting read size to max size(%u)\n", max_read_size); err = -EINVAL; goto out; } ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", fp->filp, offset, length); aux_payload_buf = kvzalloc(length, GFP_KERNEL); if (!aux_payload_buf) { err = -ENOMEM; goto out; } nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf); if (nbytes < 0) { err = nbytes; goto out; } if ((nbytes == 0 && length != 0) || nbytes < mincount) { kvfree(aux_payload_buf); rsp->hdr.Status = STATUS_END_OF_FILE; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return 0; } ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n", nbytes, offset, mincount); if (is_rdma_channel == true) { /* write data to the client using rdma channel */ remain_bytes = smb2_read_rdma_channel(work, req, aux_payload_buf, nbytes); kvfree(aux_payload_buf); aux_payload_buf = NULL; nbytes = 0; if (remain_bytes < 0) { err = (int)remain_bytes; goto out; } } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 80; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(nbytes); rsp->DataRemaining = cpu_to_le32(remain_bytes); rsp->Flags = 0; err = ksmbd_iov_pin_rsp_read(work, (void *)rsp, offsetof(struct smb2_read_rsp, Buffer), aux_payload_buf, nbytes); if (err) { kvfree(aux_payload_buf); goto out; } ksmbd_fd_put(work, fp); return 0; out: if (err) { if (err == -EISDIR) rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST; else if (err == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (err == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (err == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); } ksmbd_fd_put(work, fp); return err; } /** * smb2_write_pipe() - handler for smb2 write on IPC pipe * @work: smb work containing write IPC pipe command buffer * * Return: 0 on success, otherwise error */ static noinline int smb2_write_pipe(struct ksmbd_work *work) { struct smb2_write_req *req; struct smb2_write_rsp *rsp; struct ksmbd_rpc_command *rpc_resp; u64 id = 0; int err = 0, ret = 0; char *data_buf; size_t length; WORK_BUFFERS(work, req, rsp); length = le32_to_cpu(req->Length); id = req->VolatileFileId; if ((u64)le16_to_cpu(req->DataOffset) + length > get_rfc1002_len(work->request_buf)) { pr_err("invalid write data offset %u, smb_len %u\n", le16_to_cpu(req->DataOffset), get_rfc1002_len(work->request_buf)); err = -EINVAL; goto out; } data_buf = (char *)(((char *)&req->hdr.ProtocolId) + le16_to_cpu(req->DataOffset)); rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length); if (rpc_resp) { if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; kvfree(rpc_resp); smb2_set_err_rsp(work); return -EOPNOTSUPP; } if (rpc_resp->flags != KSMBD_RPC_OK) { rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); kvfree(rpc_resp); return ret; } kvfree(rpc_resp); } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 0; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(length); rsp->DataRemaining = 0; rsp->Reserved2 = 0; err = ksmbd_iov_pin_rsp(work, (void *)rsp, offsetof(struct smb2_write_rsp, Buffer)); out: if (err) { rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); } return err; } static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work, struct smb2_write_req *req, struct ksmbd_file *fp, loff_t offset, size_t length, bool sync) { char *data_buf; int ret; ssize_t nbytes; data_buf = kvzalloc(length, GFP_KERNEL); if (!data_buf) return -ENOMEM; ret = ksmbd_conn_rdma_read(work->conn, data_buf, length, (struct smb2_buffer_desc_v1 *) ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)), le16_to_cpu(req->WriteChannelInfoLength)); if (ret < 0) { kvfree(data_buf); return ret; } ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes); kvfree(data_buf); if (ret < 0) return ret; return nbytes; } /** * smb2_write() - handler for smb2 write from file * @work: smb work containing write command buffer * * Return: 0 on success, otherwise error */ int smb2_write(struct ksmbd_work *work) { struct smb2_write_req *req; struct smb2_write_rsp *rsp; struct ksmbd_file *fp = NULL; loff_t offset; size_t length; ssize_t nbytes; char *data_buf; bool writethrough = false, is_rdma_channel = false; int err = 0; unsigned int max_write_size = work->conn->vals->max_write_size; WORK_BUFFERS(work, req, rsp); if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) { ksmbd_debug(SMB, "IPC pipe write request\n"); return smb2_write_pipe(work); } offset = le64_to_cpu(req->Offset); length = le32_to_cpu(req->Length); if (req->Channel == SMB2_CHANNEL_RDMA_V1 || req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) { is_rdma_channel = true; max_write_size = get_smbd_max_read_write_size(); length = le32_to_cpu(req->RemainingBytes); } if (is_rdma_channel == true) { unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset); if (req->Length != 0 || req->DataOffset != 0 || ch_offset < offsetof(struct smb2_write_req, Buffer)) { err = -EINVAL; goto out; } err = smb2_set_remote_key_for_rdma(work, (struct smb2_buffer_desc_v1 *) ((char *)req + ch_offset), req->Channel, req->WriteChannelInfoLength); if (err) goto out; } if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); err = -EACCES; goto out; } fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!fp) { err = -ENOENT; goto out; } if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) { pr_err("Not permitted to write : 0x%x\n", fp->daccess); err = -EACCES; goto out; } if (length > max_write_size) { ksmbd_debug(SMB, "limiting write size to max size(%u)\n", max_write_size); err = -EINVAL; goto out; } ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags)); if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH) writethrough = true; if (is_rdma_channel == false) { if (le16_to_cpu(req->DataOffset) < offsetof(struct smb2_write_req, Buffer)) { err = -EINVAL; goto out; } data_buf = (char *)(((char *)&req->hdr.ProtocolId) + le16_to_cpu(req->DataOffset)); ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n", fp->filp, offset, length); err = ksmbd_vfs_write(work, fp, data_buf, length, &offset, writethrough, &nbytes); if (err < 0) goto out; } else { /* read data from the client using rdma channel, and * write the data. */ nbytes = smb2_write_rdma_channel(work, req, fp, offset, length, writethrough); if (nbytes < 0) { err = (int)nbytes; goto out; } } rsp->StructureSize = cpu_to_le16(17); rsp->DataOffset = 0; rsp->Reserved = 0; rsp->DataLength = cpu_to_le32(nbytes); rsp->DataRemaining = 0; rsp->Reserved2 = 0; err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer)); if (err) goto out; ksmbd_fd_put(work, fp); return 0; out: if (err == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (err == -ENOSPC || err == -EFBIG) rsp->hdr.Status = STATUS_DISK_FULL; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else if (err == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (err == -ESHARE) rsp->hdr.Status = STATUS_SHARING_VIOLATION; else if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return err; } /** * smb2_flush() - handler for smb2 flush file - fsync * @work: smb work containing flush command buffer * * Return: 0 on success, otherwise error */ int smb2_flush(struct ksmbd_work *work) { struct smb2_flush_req *req; struct smb2_flush_rsp *rsp; int err; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId); err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId); if (err) goto out; rsp->StructureSize = cpu_to_le16(4); rsp->Reserved = 0; return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp)); out: rsp->hdr.Status = STATUS_INVALID_HANDLE; smb2_set_err_rsp(work); return err; } /** * smb2_cancel() - handler for smb2 cancel command * @work: smb work containing cancel command buffer * * Return: 0 on success, otherwise error */ int smb2_cancel(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_hdr *hdr = smb2_get_msg(work->request_buf); struct smb2_hdr *chdr; struct ksmbd_work *iter; struct list_head *command_list; if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_resp_buf_next(work); ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n", hdr->MessageId, hdr->Flags); if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) { command_list = &conn->async_requests; spin_lock(&conn->request_lock); list_for_each_entry(iter, command_list, async_request_entry) { chdr = smb2_get_msg(iter->request_buf); if (iter->async_id != le64_to_cpu(hdr->Id.AsyncId)) continue; ksmbd_debug(SMB, "smb2 with AsyncId %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->Id.AsyncId), le16_to_cpu(chdr->Command)); iter->state = KSMBD_WORK_CANCELLED; if (iter->cancel_fn) iter->cancel_fn(iter->cancel_argv); break; } spin_unlock(&conn->request_lock); } else { command_list = &conn->requests; spin_lock(&conn->request_lock); list_for_each_entry(iter, command_list, request_entry) { chdr = smb2_get_msg(iter->request_buf); if (chdr->MessageId != hdr->MessageId || iter == work) continue; ksmbd_debug(SMB, "smb2 with mid %llu cancelled command = 0x%x\n", le64_to_cpu(hdr->MessageId), le16_to_cpu(chdr->Command)); iter->state = KSMBD_WORK_CANCELLED; break; } spin_unlock(&conn->request_lock); } /* For SMB2_CANCEL command itself send no response*/ work->send_no_response = 1; return 0; } struct file_lock *smb_flock_init(struct file *f) { struct file_lock *fl; fl = locks_alloc_lock(); if (!fl) goto out; locks_init_lock(fl); fl->c.flc_owner = f; fl->c.flc_pid = current->tgid; fl->c.flc_file = f; fl->c.flc_flags = FL_POSIX; fl->fl_ops = NULL; fl->fl_lmops = NULL; out: return fl; } static int smb2_set_flock_flags(struct file_lock *flock, int flags) { int cmd = -EINVAL; /* Checking for wrong flag combination during lock request*/ switch (flags) { case SMB2_LOCKFLAG_SHARED: ksmbd_debug(SMB, "received shared request\n"); cmd = F_SETLKW; flock->c.flc_type = F_RDLCK; flock->c.flc_flags |= FL_SLEEP; break; case SMB2_LOCKFLAG_EXCLUSIVE: ksmbd_debug(SMB, "received exclusive request\n"); cmd = F_SETLKW; flock->c.flc_type = F_WRLCK; flock->c.flc_flags |= FL_SLEEP; break; case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: ksmbd_debug(SMB, "received shared & fail immediately request\n"); cmd = F_SETLK; flock->c.flc_type = F_RDLCK; break; case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY: ksmbd_debug(SMB, "received exclusive & fail immediately request\n"); cmd = F_SETLK; flock->c.flc_type = F_WRLCK; break; case SMB2_LOCKFLAG_UNLOCK: ksmbd_debug(SMB, "received unlock request\n"); flock->c.flc_type = F_UNLCK; cmd = F_SETLK; break; } return cmd; } static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock, unsigned int cmd, int flags, struct list_head *lock_list) { struct ksmbd_lock *lock; lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL); if (!lock) return NULL; lock->cmd = cmd; lock->fl = flock; lock->start = flock->fl_start; lock->end = flock->fl_end; lock->flags = flags; if (lock->start == lock->end) lock->zero_len = 1; INIT_LIST_HEAD(&lock->clist); INIT_LIST_HEAD(&lock->flist); INIT_LIST_HEAD(&lock->llist); list_add_tail(&lock->llist, lock_list); return lock; } static void smb2_remove_blocked_lock(void **argv) { struct file_lock *flock = (struct file_lock *)argv[0]; ksmbd_vfs_posix_lock_unblock(flock); locks_wake_up(flock); } static inline bool lock_defer_pending(struct file_lock *fl) { /* check pending lock waiters */ return waitqueue_active(&fl->c.flc_wait); } /** * smb2_lock() - handler for smb2 file lock command * @work: smb work containing lock command buffer * * Return: 0 on success, otherwise error */ int smb2_lock(struct ksmbd_work *work) { struct smb2_lock_req *req; struct smb2_lock_rsp *rsp; struct smb2_lock_element *lock_ele; struct ksmbd_file *fp = NULL; struct file_lock *flock = NULL; struct file *filp = NULL; int lock_count; int flags = 0; int cmd = 0; int err = -EIO, i, rc = 0; u64 lock_start, lock_length; struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2; struct ksmbd_conn *conn; int nolock = 0; LIST_HEAD(lock_list); LIST_HEAD(rollback_list); int prior_lock = 0; WORK_BUFFERS(work, req, rsp); ksmbd_debug(SMB, "Received lock request\n"); fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!fp) { ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId); err = -ENOENT; goto out2; } filp = fp->filp; lock_count = le16_to_cpu(req->LockCount); lock_ele = req->locks; ksmbd_debug(SMB, "lock count is %d\n", lock_count); if (!lock_count) { err = -EINVAL; goto out2; } for (i = 0; i < lock_count; i++) { flags = le32_to_cpu(lock_ele[i].Flags); flock = smb_flock_init(filp); if (!flock) goto out; cmd = smb2_set_flock_flags(flock, flags); lock_start = le64_to_cpu(lock_ele[i].Offset); lock_length = le64_to_cpu(lock_ele[i].Length); if (lock_start > U64_MAX - lock_length) { pr_err("Invalid lock range requested\n"); rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; locks_free_lock(flock); goto out; } if (lock_start > OFFSET_MAX) flock->fl_start = OFFSET_MAX; else flock->fl_start = lock_start; lock_length = le64_to_cpu(lock_ele[i].Length); if (lock_length > OFFSET_MAX - flock->fl_start) lock_length = OFFSET_MAX - flock->fl_start; flock->fl_end = flock->fl_start + lock_length; if (flock->fl_end < flock->fl_start) { ksmbd_debug(SMB, "the end offset(%llx) is smaller than the start offset(%llx)\n", flock->fl_end, flock->fl_start); rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE; locks_free_lock(flock); goto out; } /* Check conflict locks in one request */ list_for_each_entry(cmp_lock, &lock_list, llist) { if (cmp_lock->fl->fl_start <= flock->fl_start && cmp_lock->fl->fl_end >= flock->fl_end) { if (cmp_lock->fl->c.flc_type != F_UNLCK && flock->c.flc_type != F_UNLCK) { pr_err("conflict two locks in one request\n"); err = -EINVAL; locks_free_lock(flock); goto out; } } } smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list); if (!smb_lock) { err = -EINVAL; locks_free_lock(flock); goto out; } } list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { if (smb_lock->cmd < 0) { err = -EINVAL; goto out; } if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) { err = -EINVAL; goto out; } if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) && smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) || (prior_lock == SMB2_LOCKFLAG_UNLOCK && !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) { err = -EINVAL; goto out; } prior_lock = smb_lock->flags; if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) && !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY)) goto no_check_cl; nolock = 1; /* check locks in connection list */ down_read(&conn_list_lock); list_for_each_entry(conn, &conn_list, conns_list) { spin_lock(&conn->llist_lock); list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) { if (file_inode(cmp_lock->fl->c.flc_file) != file_inode(smb_lock->fl->c.flc_file)) continue; if (lock_is_unlock(smb_lock->fl)) { if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file && cmp_lock->start == smb_lock->start && cmp_lock->end == smb_lock->end && !lock_defer_pending(cmp_lock->fl)) { nolock = 0; list_del(&cmp_lock->flist); list_del(&cmp_lock->clist); spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); locks_free_lock(cmp_lock->fl); kfree(cmp_lock); goto out_check_cl; } continue; } if (cmp_lock->fl->c.flc_file == smb_lock->fl->c.flc_file) { if (smb_lock->flags & SMB2_LOCKFLAG_SHARED) continue; } else { if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED) continue; } /* check zero byte lock range */ if (cmp_lock->zero_len && !smb_lock->zero_len && cmp_lock->start > smb_lock->start && cmp_lock->start < smb_lock->end) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("previous lock conflict with zero byte lock range\n"); goto out; } if (smb_lock->zero_len && !cmp_lock->zero_len && smb_lock->start > cmp_lock->start && smb_lock->start < cmp_lock->end) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("current lock conflict with zero byte lock range\n"); goto out; } if (((cmp_lock->start <= smb_lock->start && cmp_lock->end > smb_lock->start) || (cmp_lock->start < smb_lock->end && cmp_lock->end >= smb_lock->end)) && !cmp_lock->zero_len && !smb_lock->zero_len) { spin_unlock(&conn->llist_lock); up_read(&conn_list_lock); pr_err("Not allow lock operation on exclusive lock range\n"); goto out; } } spin_unlock(&conn->llist_lock); } up_read(&conn_list_lock); out_check_cl: if (lock_is_unlock(smb_lock->fl) && nolock) { pr_err("Try to unlock nolocked range\n"); rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; goto out; } no_check_cl: if (smb_lock->zero_len) { err = 0; goto skip; } flock = smb_lock->fl; list_del(&smb_lock->llist); retry: rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL); skip: if (flags & SMB2_LOCKFLAG_UNLOCK) { if (!rc) { ksmbd_debug(SMB, "File unlocked\n"); } else if (rc == -ENOENT) { rsp->hdr.Status = STATUS_NOT_LOCKED; goto out; } locks_free_lock(flock); kfree(smb_lock); } else { if (rc == FILE_LOCK_DEFERRED) { void **argv; ksmbd_debug(SMB, "would have to wait for getting lock\n"); list_add(&smb_lock->llist, &rollback_list); argv = kmalloc(sizeof(void *), GFP_KERNEL); if (!argv) { err = -ENOMEM; goto out; } argv[0] = flock; rc = setup_async_work(work, smb2_remove_blocked_lock, argv); if (rc) { kfree(argv); err = -ENOMEM; goto out; } spin_lock(&fp->f_lock); list_add(&work->fp_entry, &fp->blocked_works); spin_unlock(&fp->f_lock); smb2_send_interim_resp(work, STATUS_PENDING); ksmbd_vfs_posix_lock_wait(flock); spin_lock(&fp->f_lock); list_del(&work->fp_entry); spin_unlock(&fp->f_lock); if (work->state != KSMBD_WORK_ACTIVE) { list_del(&smb_lock->llist); locks_free_lock(flock); if (work->state == KSMBD_WORK_CANCELLED) { rsp->hdr.Status = STATUS_CANCELLED; kfree(smb_lock); smb2_send_interim_resp(work, STATUS_CANCELLED); work->send_no_response = 1; goto out; } rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED; kfree(smb_lock); goto out2; } list_del(&smb_lock->llist); release_async_work(work); goto retry; } else if (!rc) { list_add(&smb_lock->llist, &rollback_list); spin_lock(&work->conn->llist_lock); list_add_tail(&smb_lock->clist, &work->conn->lock_list); list_add_tail(&smb_lock->flist, &fp->lock_list); spin_unlock(&work->conn->llist_lock); ksmbd_debug(SMB, "successful in taking lock\n"); } else { goto out; } } } if (atomic_read(&fp->f_ci->op_count) > 1) smb_break_all_oplock(work, fp); rsp->StructureSize = cpu_to_le16(4); ksmbd_debug(SMB, "successful in taking lock\n"); rsp->hdr.Status = STATUS_SUCCESS; rsp->Reserved = 0; err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp)); if (err) goto out; ksmbd_fd_put(work, fp); return 0; out: list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) { locks_free_lock(smb_lock->fl); list_del(&smb_lock->llist); kfree(smb_lock); } list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) { struct file_lock *rlock = NULL; rlock = smb_flock_init(filp); rlock->c.flc_type = F_UNLCK; rlock->fl_start = smb_lock->start; rlock->fl_end = smb_lock->end; rc = vfs_lock_file(filp, F_SETLK, rlock, NULL); if (rc) pr_err("rollback unlock fail : %d\n", rc); list_del(&smb_lock->llist); spin_lock(&work->conn->llist_lock); if (!list_empty(&smb_lock->flist)) list_del(&smb_lock->flist); list_del(&smb_lock->clist); spin_unlock(&work->conn->llist_lock); locks_free_lock(smb_lock->fl); locks_free_lock(rlock); kfree(smb_lock); } out2: ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err); if (!rsp->hdr.Status) { if (err == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (err == -ENOMEM) rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES; else if (err == -ENOENT) rsp->hdr.Status = STATUS_FILE_CLOSED; else rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED; } smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return err; } static int fsctl_copychunk(struct ksmbd_work *work, struct copychunk_ioctl_req *ci_req, unsigned int cnt_code, unsigned int input_count, unsigned long long volatile_id, unsigned long long persistent_id, struct smb2_ioctl_rsp *rsp) { struct copychunk_ioctl_rsp *ci_rsp; struct ksmbd_file *src_fp = NULL, *dst_fp = NULL; struct srv_copychunk *chunks; unsigned int i, chunk_count, chunk_count_written = 0; unsigned int chunk_size_written = 0; loff_t total_size_written = 0; int ret = 0; ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0]; rsp->VolatileFileId = volatile_id; rsp->PersistentFileId = persistent_id; ci_rsp->ChunksWritten = cpu_to_le32(ksmbd_server_side_copy_max_chunk_count()); ci_rsp->ChunkBytesWritten = cpu_to_le32(ksmbd_server_side_copy_max_chunk_size()); ci_rsp->TotalBytesWritten = cpu_to_le32(ksmbd_server_side_copy_max_total_size()); chunks = (struct srv_copychunk *)&ci_req->Chunks[0]; chunk_count = le32_to_cpu(ci_req->ChunkCount); if (chunk_count == 0) goto out; total_size_written = 0; /* verify the SRV_COPYCHUNK_COPY packet */ if (chunk_count > ksmbd_server_side_copy_max_chunk_count() || input_count < offsetof(struct copychunk_ioctl_req, Chunks) + chunk_count * sizeof(struct srv_copychunk)) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; return -EINVAL; } for (i = 0; i < chunk_count; i++) { if (le32_to_cpu(chunks[i].Length) == 0 || le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size()) break; total_size_written += le32_to_cpu(chunks[i].Length); } if (i < chunk_count || total_size_written > ksmbd_server_side_copy_max_total_size()) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; return -EINVAL; } src_fp = ksmbd_lookup_foreign_fd(work, le64_to_cpu(ci_req->ResumeKey[0])); dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); ret = -EINVAL; if (!src_fp || src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) { rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; goto out; } if (!dst_fp) { rsp->hdr.Status = STATUS_FILE_CLOSED; goto out; } /* * FILE_READ_DATA should only be included in * the FSCTL_COPYCHUNK case */ if (cnt_code == FSCTL_COPYCHUNK && !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) { rsp->hdr.Status = STATUS_ACCESS_DENIED; goto out; } ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp, chunks, chunk_count, &chunk_count_written, &chunk_size_written, &total_size_written); if (ret < 0) { if (ret == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; if (ret == -EAGAIN) rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT; else if (ret == -EBADF) rsp->hdr.Status = STATUS_INVALID_HANDLE; else if (ret == -EFBIG || ret == -ENOSPC) rsp->hdr.Status = STATUS_DISK_FULL; else if (ret == -EINVAL) rsp->hdr.Status = STATUS_INVALID_PARAMETER; else if (ret == -EISDIR) rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY; else if (ret == -E2BIG) rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE; else rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; } ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written); ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written); ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written); out: ksmbd_fd_put(work, src_fp); ksmbd_fd_put(work, dst_fp); return ret; } static __be32 idev_ipv4_address(struct in_device *idev) { __be32 addr = 0; struct in_ifaddr *ifa; rcu_read_lock(); in_dev_for_each_ifa_rcu(ifa, idev) { if (ifa->ifa_flags & IFA_F_SECONDARY) continue; addr = ifa->ifa_address; break; } rcu_read_unlock(); return addr; } static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn, struct smb2_ioctl_rsp *rsp, unsigned int out_buf_len) { struct network_interface_info_ioctl_rsp *nii_rsp = NULL; int nbytes = 0; struct net_device *netdev; struct sockaddr_storage_rsp *sockaddr_storage; unsigned int flags; unsigned long long speed; rtnl_lock(); for_each_netdev(&init_net, netdev) { bool ipv4_set = false; if (netdev->type == ARPHRD_LOOPBACK) continue; flags = dev_get_flags(netdev); if (!(flags & IFF_RUNNING)) continue; ipv6_retry: if (out_buf_len < nbytes + sizeof(struct network_interface_info_ioctl_rsp)) { rtnl_unlock(); return -ENOSPC; } nii_rsp = (struct network_interface_info_ioctl_rsp *) &rsp->Buffer[nbytes]; nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex); nii_rsp->Capability = 0; if (netdev->real_num_tx_queues > 1) nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE); if (ksmbd_rdma_capable_netdev(netdev)) nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE); nii_rsp->Next = cpu_to_le32(152); nii_rsp->Reserved = 0; if (netdev->ethtool_ops->get_link_ksettings) { struct ethtool_link_ksettings cmd; netdev->ethtool_ops->get_link_ksettings(netdev, &cmd); speed = cmd.base.speed; } else { ksmbd_debug(SMB, "%s %s\n", netdev->name, "speed is unknown, defaulting to 1Gb/sec"); speed = SPEED_1000; } speed *= 1000000; nii_rsp->LinkSpeed = cpu_to_le64(speed); sockaddr_storage = (struct sockaddr_storage_rsp *) nii_rsp->SockAddr_Storage; memset(sockaddr_storage, 0, 128); if (!ipv4_set) { struct in_device *idev; sockaddr_storage->Family = cpu_to_le16(INTERNETWORK); sockaddr_storage->addr4.Port = 0; idev = __in_dev_get_rtnl(netdev); if (!idev) continue; sockaddr_storage->addr4.IPv4address = idev_ipv4_address(idev); nbytes += sizeof(struct network_interface_info_ioctl_rsp); ipv4_set = true; goto ipv6_retry; } else { struct inet6_dev *idev6; struct inet6_ifaddr *ifa; __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address; sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6); sockaddr_storage->addr6.Port = 0; sockaddr_storage->addr6.FlowInfo = 0; idev6 = __in6_dev_get(netdev); if (!idev6) continue; list_for_each_entry(ifa, &idev6->addr_list, if_list) { if (ifa->flags & (IFA_F_TENTATIVE | IFA_F_DEPRECATED)) continue; memcpy(ipv6_addr, ifa->addr.s6_addr, 16); break; } sockaddr_storage->addr6.ScopeId = 0; nbytes += sizeof(struct network_interface_info_ioctl_rsp); } } rtnl_unlock(); /* zero if this is last one */ if (nii_rsp) nii_rsp->Next = 0; rsp->PersistentFileId = SMB2_NO_FID; rsp->VolatileFileId = SMB2_NO_FID; return nbytes; } static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn, struct validate_negotiate_info_req *neg_req, struct validate_negotiate_info_rsp *neg_rsp, unsigned int in_buf_len) { int ret = 0; int dialect; if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) + le16_to_cpu(neg_req->DialectCount) * sizeof(__le16)) return -EINVAL; dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects, neg_req->DialectCount); if (dialect == BAD_PROT_ID || dialect != conn->dialect) { ret = -EINVAL; goto err_out; } if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) { ret = -EINVAL; goto err_out; } if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) { ret = -EINVAL; goto err_out; } if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) { ret = -EINVAL; goto err_out; } neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities); memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE); neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode); neg_rsp->Dialect = cpu_to_le16(conn->dialect); err_out: return ret; } static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id, struct file_allocated_range_buffer *qar_req, struct file_allocated_range_buffer *qar_rsp, unsigned int in_count, unsigned int *out_count) { struct ksmbd_file *fp; loff_t start, length; int ret = 0; *out_count = 0; if (in_count == 0) return -EINVAL; start = le64_to_cpu(qar_req->file_offset); length = le64_to_cpu(qar_req->length); if (start < 0 || length < 0) return -EINVAL; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) return -ENOENT; ret = ksmbd_vfs_fqar_lseek(fp, start, length, qar_rsp, in_count, out_count); if (ret && ret != -E2BIG) *out_count = 0; ksmbd_fd_put(work, fp); return ret; } static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id, unsigned int out_buf_len, struct smb2_ioctl_req *req, struct smb2_ioctl_rsp *rsp) { struct ksmbd_rpc_command *rpc_resp; char *data_buf = (char *)req + le32_to_cpu(req->InputOffset); int nbytes = 0; rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf, le32_to_cpu(req->InputCount)); if (rpc_resp) { if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) { /* * set STATUS_SOME_NOT_MAPPED response * for unknown domain sid. */ rsp->hdr.Status = STATUS_SOME_NOT_MAPPED; } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; goto out; } else if (rpc_resp->flags != KSMBD_RPC_OK) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; goto out; } nbytes = rpc_resp->payload_sz; if (rpc_resp->payload_sz > out_buf_len) { rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; nbytes = out_buf_len; } if (!rpc_resp->payload_sz) { rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR; goto out; } memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes); } out: kvfree(rpc_resp); return nbytes; } static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id, struct file_sparse *sparse) { struct ksmbd_file *fp; struct mnt_idmap *idmap; int ret = 0; __le32 old_fattr; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) return -ENOENT; idmap = file_mnt_idmap(fp->filp); old_fattr = fp->f_ci->m_fattr; if (sparse->SetSparse) fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE; else fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE; if (fp->f_ci->m_fattr != old_fattr && test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) { struct xattr_dos_attrib da; ret = ksmbd_vfs_get_dos_attrib_xattr(idmap, fp->filp->f_path.dentry, &da); if (ret <= 0) goto out; da.attr = le32_to_cpu(fp->f_ci->m_fattr); ret = ksmbd_vfs_set_dos_attrib_xattr(idmap, &fp->filp->f_path, &da, true); if (ret) fp->f_ci->m_fattr = old_fattr; } out: ksmbd_fd_put(work, fp); return ret; } static int fsctl_request_resume_key(struct ksmbd_work *work, struct smb2_ioctl_req *req, struct resume_key_ioctl_rsp *key_rsp) { struct ksmbd_file *fp; fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId); if (!fp) return -ENOENT; memset(key_rsp, 0, sizeof(*key_rsp)); key_rsp->ResumeKey[0] = req->VolatileFileId; key_rsp->ResumeKey[1] = req->PersistentFileId; ksmbd_fd_put(work, fp); return 0; } /** * smb2_ioctl() - handler for smb2 ioctl command * @work: smb work containing ioctl command buffer * * Return: 0 on success, otherwise error */ int smb2_ioctl(struct ksmbd_work *work) { struct smb2_ioctl_req *req; struct smb2_ioctl_rsp *rsp; unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len; u64 id = KSMBD_NO_FID; struct ksmbd_conn *conn = work->conn; int ret = 0; char *buffer; if (work->next_smb2_rcv_hdr_off) { req = ksmbd_req_buf_next(work); rsp = ksmbd_resp_buf_next(work); if (!has_file_id(req->VolatileFileId)) { ksmbd_debug(SMB, "Compound request set FID = %llu\n", work->compound_fid); id = work->compound_fid; } } else { req = smb2_get_msg(work->request_buf); rsp = smb2_get_msg(work->response_buf); } if (!has_file_id(id)) id = req->VolatileFileId; if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) { rsp->hdr.Status = STATUS_NOT_SUPPORTED; goto out; } buffer = (char *)req + le32_to_cpu(req->InputOffset); cnt_code = le32_to_cpu(req->CtlCode); ret = smb2_calc_max_out_buf_len(work, 48, le32_to_cpu(req->MaxOutputResponse)); if (ret < 0) { rsp->hdr.Status = STATUS_INVALID_PARAMETER; goto out; } out_buf_len = (unsigned int)ret; in_buf_len = le32_to_cpu(req->InputCount); switch (cnt_code) { case FSCTL_DFS_GET_REFERRALS: case FSCTL_DFS_GET_REFERRALS_EX: /* Not support DFS yet */ rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED; goto out; case FSCTL_CREATE_OR_GET_OBJECT_ID: { struct file_object_buf_type1_ioctl_rsp *obj_buf; nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp); obj_buf = (struct file_object_buf_type1_ioctl_rsp *) &rsp->Buffer[0]; /* * TODO: This is dummy implementation to pass smbtorture * Need to check correct response later */ memset(obj_buf->ObjectId, 0x0, 16); memset(obj_buf->BirthVolumeId, 0x0, 16); memset(obj_buf->BirthObjectId, 0x0, 16); memset(obj_buf->DomainId, 0x0, 16); break; } case FSCTL_PIPE_TRANSCEIVE: out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len); nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp); break; case FSCTL_VALIDATE_NEGOTIATE_INFO: if (conn->dialect < SMB30_PROT_ID) { ret = -EOPNOTSUPP; goto out; } if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects)) { ret = -EINVAL; goto out; } if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) { ret = -EINVAL; goto out; } ret = fsctl_validate_negotiate_info(conn, (struct validate_negotiate_info_req *)buffer, (struct validate_negotiate_info_rsp *)&rsp->Buffer[0], in_buf_len); if (ret < 0) goto out; nbytes = sizeof(struct validate_negotiate_info_rsp); rsp->PersistentFileId = SMB2_NO_FID; rsp->VolatileFileId = SMB2_NO_FID; break; case FSCTL_QUERY_NETWORK_INTERFACE_INFO: ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len); if (ret < 0) goto out; nbytes = ret; break; case FSCTL_REQUEST_RESUME_KEY: if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) { ret = -EINVAL; goto out; } ret = fsctl_request_resume_key(work, req, (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]); if (ret < 0) goto out; rsp->PersistentFileId = req->PersistentFileId; rsp->VolatileFileId = req->VolatileFileId; nbytes = sizeof(struct resume_key_ioctl_rsp); break; case FSCTL_COPYCHUNK: case FSCTL_COPYCHUNK_WRITE: if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } if (in_buf_len < sizeof(struct copychunk_ioctl_req)) { ret = -EINVAL; goto out; } if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) { ret = -EINVAL; goto out; } nbytes = sizeof(struct copychunk_ioctl_rsp); rsp->VolatileFileId = req->VolatileFileId; rsp->PersistentFileId = req->PersistentFileId; fsctl_copychunk(work, (struct copychunk_ioctl_req *)buffer, le32_to_cpu(req->CtlCode), le32_to_cpu(req->InputCount), req->VolatileFileId, req->PersistentFileId, rsp); break; case FSCTL_SET_SPARSE: if (in_buf_len < sizeof(struct file_sparse)) { ret = -EINVAL; goto out; } ret = fsctl_set_sparse(work, id, (struct file_sparse *)buffer); if (ret < 0) goto out; break; case FSCTL_SET_ZERO_DATA: { struct file_zero_data_information *zero_data; struct ksmbd_file *fp; loff_t off, len, bfz; if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) { ksmbd_debug(SMB, "User does not have write permission\n"); ret = -EACCES; goto out; } if (in_buf_len < sizeof(struct file_zero_data_information)) { ret = -EINVAL; goto out; } zero_data = (struct file_zero_data_information *)buffer; off = le64_to_cpu(zero_data->FileOffset); bfz = le64_to_cpu(zero_data->BeyondFinalZero); if (off < 0 || bfz < 0 || off > bfz) { ret = -EINVAL; goto out; } len = bfz - off; if (len) { fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { ret = -ENOENT; goto out; } ret = ksmbd_vfs_zero_data(work, fp, off, len); ksmbd_fd_put(work, fp); if (ret < 0) goto out; } break; } case FSCTL_QUERY_ALLOCATED_RANGES: if (in_buf_len < sizeof(struct file_allocated_range_buffer)) { ret = -EINVAL; goto out; } ret = fsctl_query_allocated_ranges(work, id, (struct file_allocated_range_buffer *)buffer, (struct file_allocated_range_buffer *)&rsp->Buffer[0], out_buf_len / sizeof(struct file_allocated_range_buffer), &nbytes); if (ret == -E2BIG) { rsp->hdr.Status = STATUS_BUFFER_OVERFLOW; } else if (ret < 0) { nbytes = 0; goto out; } nbytes *= sizeof(struct file_allocated_range_buffer); break; case FSCTL_GET_REPARSE_POINT: { struct reparse_data_buffer *reparse_ptr; struct ksmbd_file *fp; reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0]; fp = ksmbd_lookup_fd_fast(work, id); if (!fp) { pr_err("not found fp!!\n"); ret = -ENOENT; goto out; } reparse_ptr->ReparseTag = smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode); reparse_ptr->ReparseDataLength = 0; ksmbd_fd_put(work, fp); nbytes = sizeof(struct reparse_data_buffer); break; } case FSCTL_DUPLICATE_EXTENTS_TO_FILE: { struct ksmbd_file *fp_in, *fp_out = NULL; struct duplicate_extents_to_file *dup_ext; loff_t src_off, dst_off, length, cloned; if (in_buf_len < sizeof(struct duplicate_extents_to_file)) { ret = -EINVAL; goto out; } dup_ext = (struct duplicate_extents_to_file *)buffer; fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle, dup_ext->PersistentFileHandle); if (!fp_in) { pr_err("not found file handle in duplicate extent to file\n"); ret = -ENOENT; goto out; } fp_out = ksmbd_lookup_fd_fast(work, id); if (!fp_out) { pr_err("not found fp\n"); ret = -ENOENT; goto dup_ext_out; } src_off = le64_to_cpu(dup_ext->SourceFileOffset); dst_off = le64_to_cpu(dup_ext->TargetFileOffset); length = le64_to_cpu(dup_ext->ByteCount); /* * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE * should fall back to vfs_copy_file_range(). This could be * beneficial when re-exporting nfs/smb mount, but note that * this can result in partial copy that returns an error status. * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented, * fall back to vfs_copy_file_range(), should be avoided when * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set. */ cloned = vfs_clone_file_range(fp_in->filp, src_off, fp_out->filp, dst_off, length, 0); if (cloned == -EXDEV || cloned == -EOPNOTSUPP) { ret = -EOPNOTSUPP; goto dup_ext_out; } else if (cloned != length) { cloned = vfs_copy_file_range(fp_in->filp, src_off, fp_out->filp, dst_off, length, 0); if (cloned != length) { if (cloned < 0) ret = cloned; else ret = -EINVAL; } } dup_ext_out: ksmbd_fd_put(work, fp_in); ksmbd_fd_put(work, fp_out); if (ret < 0) goto out; break; } default: ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n", cnt_code); ret = -EOPNOTSUPP; goto out; } rsp->CtlCode = cpu_to_le32(cnt_code); rsp->InputCount = cpu_to_le32(0); rsp->InputOffset = cpu_to_le32(112); rsp->OutputOffset = cpu_to_le32(112); rsp->OutputCount = cpu_to_le32(nbytes); rsp->StructureSize = cpu_to_le16(49); rsp->Reserved = cpu_to_le16(0); rsp->Flags = cpu_to_le32(0); rsp->Reserved2 = cpu_to_le32(0); ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes); if (!ret) return ret; out: if (ret == -EACCES) rsp->hdr.Status = STATUS_ACCESS_DENIED; else if (ret == -ENOENT) rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND; else if (ret == -EOPNOTSUPP) rsp->hdr.Status = STATUS_NOT_SUPPORTED; else if (ret == -ENOSPC) rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL; else if (ret < 0 || rsp->hdr.Status == 0) rsp->hdr.Status = STATUS_INVALID_PARAMETER; smb2_set_err_rsp(work); return 0; } /** * smb20_oplock_break_ack() - handler for smb2.0 oplock break command * @work: smb work containing oplock break command buffer * * Return: 0 */ static void smb20_oplock_break_ack(struct ksmbd_work *work) { struct smb2_oplock_break *req; struct smb2_oplock_break *rsp; struct ksmbd_file *fp; struct oplock_info *opinfo = NULL; __le32 err = 0; int ret = 0; u64 volatile_id, persistent_id; char req_oplevel = 0, rsp_oplevel = 0; unsigned int oplock_change_type; WORK_BUFFERS(work, req, rsp); volatile_id = req->VolatileFid; persistent_id = req->PersistentFid; req_oplevel = req->OplockLevel; ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n", volatile_id, persistent_id, req_oplevel); fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id); if (!fp) { rsp->hdr.Status = STATUS_FILE_CLOSED; smb2_set_err_rsp(work); return; } opinfo = opinfo_get(fp); if (!opinfo) { pr_err("unexpected null oplock_info\n"); rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; smb2_set_err_rsp(work); ksmbd_fd_put(work, fp); return; } if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) { rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL; goto err_out; } if (opinfo->op_state == OPLOCK_STATE_NONE) { ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state); rsp->hdr.Status = STATUS_UNSUCCESSFUL; goto err_out; } if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && (req_oplevel != SMB2_OPLOCK_LEVEL_II && req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) { err = STATUS_INVALID_OPLOCK_PROTOCOL; oplock_change_type = OPLOCK_WRITE_TO_NONE; } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && req_oplevel != SMB2_OPLOCK_LEVEL_NONE) { err = STATUS_INVALID_OPLOCK_PROTOCOL; oplock_change_type = OPLOCK_READ_TO_NONE; } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II || req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { err = STATUS_INVALID_DEVICE_STATE; if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && req_oplevel == SMB2_OPLOCK_LEVEL_II) { oplock_change_type = OPLOCK_WRITE_TO_READ; } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE || opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) && req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { oplock_change_type = OPLOCK_WRITE_TO_NONE; } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II && req_oplevel == SMB2_OPLOCK_LEVEL_NONE) { oplock_change_type = OPLOCK_READ_TO_NONE; } else { oplock_change_type = 0; } } else { oplock_change_type = 0; } switch (oplock_change_type) { case OPLOCK_WRITE_TO_READ: ret = opinfo_write_to_read(opinfo); rsp_oplevel = SMB2_OPLOCK_LEVEL_II; break; case OPLOCK_WRITE_TO_NONE: ret = opinfo_write_to_none(opinfo); rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; break; case OPLOCK_READ_TO_NONE: ret = opinfo_read_to_none(opinfo); rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE; break; default: pr_err("unknown oplock change 0x%x -> 0x%x\n", opinfo->level, rsp_oplevel); } if (ret < 0) { rsp->hdr.Status = err; goto err_out; } opinfo->op_state = OPLOCK_STATE_NONE; wake_up_interruptible_all(&opinfo->oplock_q); opinfo_put(opinfo); ksmbd_fd_put(work, fp); rsp->StructureSize = cpu_to_le16(24); rsp->OplockLevel = rsp_oplevel; rsp->Reserved = 0; rsp->Reserved2 = 0; rsp->VolatileFid = volatile_id; rsp->PersistentFid = persistent_id; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break)); if (!ret) return; err_out: opinfo->op_state = OPLOCK_STATE_NONE; wake_up_interruptible_all(&opinfo->oplock_q); opinfo_put(opinfo); ksmbd_fd_put(work, fp); smb2_set_err_rsp(work); } static int check_lease_state(struct lease *lease, __le32 req_state) { if ((lease->new_state == (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) && !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) { lease->new_state = req_state; return 0; } if (lease->new_state == req_state) return 0; return 1; } /** * smb21_lease_break_ack() - handler for smb2.1 lease break command * @work: smb work containing lease break command buffer * * Return: 0 */ static void smb21_lease_break_ack(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_lease_ack *req; struct smb2_lease_ack *rsp; struct oplock_info *opinfo; __le32 err = 0; int ret = 0; unsigned int lease_change_type; __le32 lease_state; struct lease *lease; WORK_BUFFERS(work, req, rsp); ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n", le32_to_cpu(req->LeaseState)); opinfo = lookup_lease_in_table(conn, req->LeaseKey); if (!opinfo) { ksmbd_debug(OPLOCK, "file not opened\n"); smb2_set_err_rsp(work); rsp->hdr.Status = STATUS_UNSUCCESSFUL; return; } lease = opinfo->o_lease; if (opinfo->op_state == OPLOCK_STATE_NONE) { pr_err("unexpected lease break state 0x%x\n", opinfo->op_state); rsp->hdr.Status = STATUS_UNSUCCESSFUL; goto err_out; } if (check_lease_state(lease, req->LeaseState)) { rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED; ksmbd_debug(OPLOCK, "req lease state: 0x%x, expected state: 0x%x\n", req->LeaseState, lease->new_state); goto err_out; } if (!atomic_read(&opinfo->breaking_cnt)) { rsp->hdr.Status = STATUS_UNSUCCESSFUL; goto err_out; } /* check for bad lease state */ if (req->LeaseState & (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) { err = STATUS_INVALID_OPLOCK_PROTOCOL; if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) lease_change_type = OPLOCK_WRITE_TO_NONE; else lease_change_type = OPLOCK_READ_TO_NONE; ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", le32_to_cpu(lease->state), le32_to_cpu(req->LeaseState)); } else if (lease->state == SMB2_LEASE_READ_CACHING_LE && req->LeaseState != SMB2_LEASE_NONE_LE) { err = STATUS_INVALID_OPLOCK_PROTOCOL; lease_change_type = OPLOCK_READ_TO_NONE; ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n", le32_to_cpu(lease->state), le32_to_cpu(req->LeaseState)); } else { /* valid lease state changes */ err = STATUS_INVALID_DEVICE_STATE; if (req->LeaseState == SMB2_LEASE_NONE_LE) { if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) lease_change_type = OPLOCK_WRITE_TO_NONE; else lease_change_type = OPLOCK_READ_TO_NONE; } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) { if (lease->state & SMB2_LEASE_WRITE_CACHING_LE) lease_change_type = OPLOCK_WRITE_TO_READ; else lease_change_type = OPLOCK_READ_HANDLE_TO_READ; } else { lease_change_type = 0; } } switch (lease_change_type) { case OPLOCK_WRITE_TO_READ: ret = opinfo_write_to_read(opinfo); break; case OPLOCK_READ_HANDLE_TO_READ: ret = opinfo_read_handle_to_read(opinfo); break; case OPLOCK_WRITE_TO_NONE: ret = opinfo_write_to_none(opinfo); break; case OPLOCK_READ_TO_NONE: ret = opinfo_read_to_none(opinfo); break; default: ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n", le32_to_cpu(lease->state), le32_to_cpu(req->LeaseState)); } if (ret < 0) { rsp->hdr.Status = err; goto err_out; } lease_state = lease->state; opinfo->op_state = OPLOCK_STATE_NONE; wake_up_interruptible_all(&opinfo->oplock_q); atomic_dec(&opinfo->breaking_cnt); wake_up_interruptible_all(&opinfo->oplock_brk); opinfo_put(opinfo); rsp->StructureSize = cpu_to_le16(36); rsp->Reserved = 0; rsp->Flags = 0; memcpy(rsp->LeaseKey, req->LeaseKey, 16); rsp->LeaseState = lease_state; rsp->LeaseDuration = 0; ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack)); if (!ret) return; err_out: wake_up_interruptible_all(&opinfo->oplock_q); atomic_dec(&opinfo->breaking_cnt); wake_up_interruptible_all(&opinfo->oplock_brk); opinfo_put(opinfo); smb2_set_err_rsp(work); } /** * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break * @work: smb work containing oplock/lease break command buffer * * Return: 0 */ int smb2_oplock_break(struct ksmbd_work *work) { struct smb2_oplock_break *req; struct smb2_oplock_break *rsp; WORK_BUFFERS(work, req, rsp); switch (le16_to_cpu(req->StructureSize)) { case OP_BREAK_STRUCT_SIZE_20: smb20_oplock_break_ack(work); break; case OP_BREAK_STRUCT_SIZE_21: smb21_lease_break_ack(work); break; default: ksmbd_debug(OPLOCK, "invalid break cmd %d\n", le16_to_cpu(req->StructureSize)); rsp->hdr.Status = STATUS_INVALID_PARAMETER; smb2_set_err_rsp(work); } return 0; } /** * smb2_notify() - handler for smb2 notify request * @work: smb work containing notify command buffer * * Return: 0 */ int smb2_notify(struct ksmbd_work *work) { struct smb2_change_notify_req *req; struct smb2_change_notify_rsp *rsp; WORK_BUFFERS(work, req, rsp); if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) { rsp->hdr.Status = STATUS_INTERNAL_ERROR; smb2_set_err_rsp(work); return 0; } smb2_set_err_rsp(work); rsp->hdr.Status = STATUS_NOT_IMPLEMENTED; return 0; } /** * smb2_is_sign_req() - handler for checking packet signing status * @work: smb work containing notify command buffer * @command: SMB2 command id * * Return: true if packed is signed, false otherwise */ bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command) { struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf); if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) && command != SMB2_NEGOTIATE_HE && command != SMB2_SESSION_SETUP_HE && command != SMB2_OPLOCK_BREAK_HE) return true; return false; } /** * smb2_check_sign_req() - handler for req packet sign processing * @work: smb work containing notify command buffer * * Return: 1 on success, 0 otherwise */ int smb2_check_sign_req(struct ksmbd_work *work) { struct smb2_hdr *hdr; char signature_req[SMB2_SIGNATURE_SIZE]; char signature[SMB2_HMACSHA256_SIZE]; struct kvec iov[1]; size_t len; hdr = smb2_get_msg(work->request_buf); if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_req_buf_next(work); if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) len = get_rfc1002_len(work->request_buf); else if (hdr->NextCommand) len = le32_to_cpu(hdr->NextCommand); else len = get_rfc1002_len(work->request_buf) - work->next_smb2_rcv_hdr_off; memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov[0].iov_base = (char *)&hdr->ProtocolId; iov[0].iov_len = len; if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1, signature)) return 0; if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { pr_err("bad smb2 signature\n"); return 0; } return 1; } /** * smb2_set_sign_rsp() - handler for rsp packet sign processing * @work: smb work containing notify command buffer * */ void smb2_set_sign_rsp(struct ksmbd_work *work) { struct smb2_hdr *hdr; char signature[SMB2_HMACSHA256_SIZE]; struct kvec *iov; int n_vec = 1; hdr = ksmbd_resp_buf_curr(work); hdr->Flags |= SMB2_FLAGS_SIGNED; memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); if (hdr->Command == SMB2_READ) { iov = &work->iov[work->iov_idx - 1]; n_vec++; } else { iov = &work->iov[work->iov_idx]; } if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec, signature)) memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); } /** * smb3_check_sign_req() - handler for req packet sign processing * @work: smb work containing notify command buffer * * Return: 1 on success, 0 otherwise */ int smb3_check_sign_req(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; char *signing_key; struct smb2_hdr *hdr; struct channel *chann; char signature_req[SMB2_SIGNATURE_SIZE]; char signature[SMB2_CMACAES_SIZE]; struct kvec iov[1]; size_t len; hdr = smb2_get_msg(work->request_buf); if (work->next_smb2_rcv_hdr_off) hdr = ksmbd_req_buf_next(work); if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off) len = get_rfc1002_len(work->request_buf); else if (hdr->NextCommand) len = le32_to_cpu(hdr->NextCommand); else len = get_rfc1002_len(work->request_buf) - work->next_smb2_rcv_hdr_off; if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { signing_key = work->sess->smb3signingkey; } else { chann = lookup_chann_list(work->sess, conn); if (!chann) { return 0; } signing_key = chann->smb3signingkey; } if (!signing_key) { pr_err("SMB3 signing key is not generated\n"); return 0; } memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE); memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); iov[0].iov_base = (char *)&hdr->ProtocolId; iov[0].iov_len = len; if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature)) return 0; if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) { pr_err("bad smb2 signature\n"); return 0; } return 1; } /** * smb3_set_sign_rsp() - handler for rsp packet sign processing * @work: smb work containing notify command buffer * */ void smb3_set_sign_rsp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct smb2_hdr *hdr; struct channel *chann; char signature[SMB2_CMACAES_SIZE]; struct kvec *iov; int n_vec = 1; char *signing_key; hdr = ksmbd_resp_buf_curr(work); if (conn->binding == false && le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) { signing_key = work->sess->smb3signingkey; } else { chann = lookup_chann_list(work->sess, work->conn); if (!chann) { return; } signing_key = chann->smb3signingkey; } if (!signing_key) return; hdr->Flags |= SMB2_FLAGS_SIGNED; memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE); if (hdr->Command == SMB2_READ) { iov = &work->iov[work->iov_idx - 1]; n_vec++; } else { iov = &work->iov[work->iov_idx]; } if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec, signature)) memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE); } /** * smb3_preauth_hash_rsp() - handler for computing preauth hash on response * @work: smb work containing response buffer * */ void smb3_preauth_hash_rsp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct smb2_hdr *req, *rsp; if (conn->dialect != SMB311_PROT_ID) return; WORK_BUFFERS(work, req, rsp); if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE && conn->preauth_info) ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, conn->preauth_info->Preauth_HashValue); if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) { __u8 *hash_value; if (conn->binding) { struct preauth_session *preauth_sess; preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id); if (!preauth_sess) return; hash_value = preauth_sess->Preauth_HashValue; } else { hash_value = sess->Preauth_HashValue; if (!hash_value) return; } ksmbd_gen_preauth_integrity_hash(conn, work->response_buf, hash_value); } } static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type) { struct smb2_transform_hdr *tr_hdr = tr_buf + 4; struct smb2_hdr *hdr = smb2_get_msg(old_buf); unsigned int orig_len = get_rfc1002_len(old_buf); /* tr_buf must be cleared by the caller */ tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED); if (cipher_type == SMB2_ENCRYPTION_AES128_GCM || cipher_type == SMB2_ENCRYPTION_AES256_GCM) get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE); else get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE); memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8); inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr)); inc_rfc1001_len(tr_buf, orig_len); } int smb3_encrypt_resp(struct ksmbd_work *work) { struct kvec *iov = work->iov; int rc = -ENOMEM; void *tr_buf; tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL); if (!tr_buf) return rc; /* fill transform header */ fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type); iov[0].iov_base = tr_buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; work->tr_buf = tr_buf; return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1); } bool smb3_is_transform_hdr(void *buf) { struct smb2_transform_hdr *trhdr = smb2_get_msg(buf); return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; } int smb3_decrypt_req(struct ksmbd_work *work) { struct ksmbd_session *sess; char *buf = work->request_buf; unsigned int pdu_length = get_rfc1002_len(buf); struct kvec iov[2]; int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr); struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf); int rc = 0; if (pdu_length < sizeof(struct smb2_transform_hdr) || buf_data_size < sizeof(struct smb2_hdr)) { pr_err("Transform message is too small (%u)\n", pdu_length); return -ECONNABORTED; } if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) { pr_err("Transform message is broken\n"); return -ECONNABORTED; } sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId)); if (!sess) { pr_err("invalid session id(%llx) in transform header\n", le64_to_cpu(tr_hdr->SessionId)); return -ECONNABORTED; } iov[0].iov_base = buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4; iov[1].iov_len = buf_data_size; rc = ksmbd_crypt_message(work, iov, 2, 0); if (rc) return rc; memmove(buf + 4, iov[1].iov_base, buf_data_size); *(__be32 *)buf = cpu_to_be32(buf_data_size); return rc; } bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work) { struct ksmbd_conn *conn = work->conn; struct ksmbd_session *sess = work->sess; struct smb2_hdr *rsp = smb2_get_msg(work->response_buf); if (conn->dialect < SMB30_PROT_ID) return false; if (work->next_smb2_rcv_hdr_off) rsp = ksmbd_resp_buf_next(work); if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess->user && !user_guest(sess->user) && rsp->Status == STATUS_SUCCESS) return true; return false; }
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