| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Pavel Shilovsky | 8328 | 28.09% | 105 | 17.98% |
| Ronnie Sahlberg | 6682 | 22.54% | 83 | 14.21% |
| Steve French | 6434 | 21.70% | 169 | 28.94% |
| Paulo Alcantara | 1946 | 6.56% | 32 | 5.48% |
| Shyam Prasad N | 1834 | 6.19% | 35 | 5.99% |
| David Howells | 1627 | 5.49% | 28 | 4.79% |
| Aurelien Aptel | 1082 | 3.65% | 15 | 2.57% |
| Rohith Surabattula | 455 | 1.53% | 8 | 1.37% |
| Shirish Pargaonkar | 251 | 0.85% | 3 | 0.51% |
| Jeff Layton | 197 | 0.66% | 23 | 3.94% |
| Sachin S. Prabhu | 182 | 0.61% | 12 | 2.05% |
| Volker Lendecke | 119 | 0.40% | 2 | 0.34% |
| Amir Goldstein | 72 | 0.24% | 1 | 0.17% |
| Joe Perches | 43 | 0.15% | 3 | 0.51% |
| Long Li | 41 | 0.14% | 4 | 0.68% |
| Al Viro | 38 | 0.13% | 9 | 1.54% |
| Christoph Probst | 36 | 0.12% | 2 | 0.34% |
| ZhangXiaoxu | 28 | 0.09% | 2 | 0.34% |
| Christoph Hellwig | 21 | 0.07% | 2 | 0.34% |
| Xiong Zhou | 20 | 0.07% | 2 | 0.34% |
| Igor Mammedov | 16 | 0.05% | 1 | 0.17% |
| Jan Kara | 14 | 0.05% | 1 | 0.17% |
| Anastasia Belova | 14 | 0.05% | 2 | 0.34% |
| Stefano Brivio | 13 | 0.04% | 1 | 0.17% |
| SF Markus Elfring | 12 | 0.04% | 1 | 0.17% |
| Sebastien Tisserant | 11 | 0.04% | 1 | 0.17% |
| Gilad Ben-Yossef | 11 | 0.04% | 1 | 0.17% |
| Enzo Matsumiya | 11 | 0.04% | 3 | 0.51% |
| Ritvik Budhiraja | 10 | 0.03% | 1 | 0.17% |
| Andy Shevchenko | 10 | 0.03% | 1 | 0.17% |
| Lars Persson | 8 | 0.03% | 1 | 0.17% |
| Hyeoncheol Lee | 8 | 0.03% | 1 | 0.17% |
| Bharath SM | 8 | 0.03% | 1 | 0.17% |
| Mark Syms | 7 | 0.02% | 1 | 0.17% |
| Boris Protopopov | 5 | 0.02% | 1 | 0.17% |
| Arnd Bergmann | 5 | 0.02% | 1 | 0.17% |
| Eric W. Biedermann | 5 | 0.02% | 1 | 0.17% |
| Paul Aurich | 4 | 0.01% | 2 | 0.34% |
| Andreas Gruenbacher | 4 | 0.01% | 2 | 0.34% |
| Stefan Metzmacher | 4 | 0.01% | 1 | 0.17% |
| Dan Carpenter | 3 | 0.01% | 1 | 0.17% |
| Alexey Dobriyan | 3 | 0.01% | 1 | 0.17% |
| Mark Fasheh | 3 | 0.01% | 1 | 0.17% |
| Linus Torvalds (pre-git) | 3 | 0.01% | 2 | 0.34% |
| Ard Biesheuvel | 3 | 0.01% | 1 | 0.17% |
| Tobias Regnery | 3 | 0.01% | 1 | 0.17% |
| Kirill A. Shutemov | 2 | 0.01% | 1 | 0.17% |
| Alexander Strakh | 2 | 0.01% | 1 | 0.17% |
| Jeremy Allison | 2 | 0.01% | 1 | 0.17% |
| Pawel Witek | 1 | 0.00% | 1 | 0.17% |
| Vladimir Zapolskiy | 1 | 0.00% | 1 | 0.17% |
| Fabian Frederick | 1 | 0.00% | 1 | 0.17% |
| Justin Stitt | 1 | 0.00% | 1 | 0.17% |
| Christophe Jaillet | 1 | 0.00% | 1 | 0.17% |
| Thomas Gleixner | 1 | 0.00% | 1 | 0.17% |
| Eric Sesterhenn / Snakebyte | 1 | 0.00% | 1 | 0.17% |
| Miklos Szeredi | 1 | 0.00% | 1 | 0.17% |
| Gustavo A. R. Silva | 1 | 0.00% | 1 | 0.17% |
| Total | 29649 | 584 |
// SPDX-License-Identifier: GPL-2.0 /* * SMB2 version specific operations * * Copyright (c) 2012, Jeff Layton <jlayton@redhat.com> */ #include <linux/pagemap.h> #include <linux/vfs.h> #include <linux/falloc.h> #include <linux/scatterlist.h> #include <linux/uuid.h> #include <linux/sort.h> #include <crypto/aead.h> #include <linux/fiemap.h> #include <uapi/linux/magic.h> #include "cifsfs.h" #include "cifsglob.h" #include "smb2pdu.h" #include "smb2proto.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_unicode.h" #include "smb2status.h" #include "smb2glob.h" #include "cifs_ioctl.h" #include "smbdirect.h" #include "fscache.h" #include "fs_context.h" #include "cached_dir.h" #include "reparse.h" /* Change credits for different ops and return the total number of credits */ static int change_conf(struct TCP_Server_Info *server) { server->credits += server->echo_credits + server->oplock_credits; if (server->credits > server->max_credits) server->credits = server->max_credits; server->oplock_credits = server->echo_credits = 0; switch (server->credits) { case 0: return 0; case 1: server->echoes = false; server->oplocks = false; break; case 2: server->echoes = true; server->oplocks = false; server->echo_credits = 1; break; default: server->echoes = true; if (enable_oplocks) { server->oplocks = true; server->oplock_credits = 1; } else server->oplocks = false; server->echo_credits = 1; } server->credits -= server->echo_credits + server->oplock_credits; return server->credits + server->echo_credits + server->oplock_credits; } static void smb2_add_credits(struct TCP_Server_Info *server, struct cifs_credits *credits, const int optype) { int *val, rc = -1; int scredits, in_flight; unsigned int add = credits->value; unsigned int instance = credits->instance; bool reconnect_detected = false; bool reconnect_with_invalid_credits = false; spin_lock(&server->req_lock); val = server->ops->get_credits_field(server, optype); /* eg found case where write overlapping reconnect messed up credits */ if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0)) reconnect_with_invalid_credits = true; if ((instance == 0) || (instance == server->reconnect_instance)) *val += add; else reconnect_detected = true; if (*val > 65000) { *val = 65000; /* Don't get near 64K credits, avoid srv bugs */ pr_warn_once("server overflowed SMB3 credits\n"); trace_smb3_overflow_credits(server->CurrentMid, server->conn_id, server->hostname, *val, add, server->in_flight); } if (credits->in_flight_check > 1) { pr_warn_once("rreq R=%08x[%x] Credits not in flight\n", credits->rreq_debug_id, credits->rreq_debug_index); } else { credits->in_flight_check = 2; } if (WARN_ON_ONCE(server->in_flight == 0)) { pr_warn_once("rreq R=%08x[%x] Zero in_flight\n", credits->rreq_debug_id, credits->rreq_debug_index); trace_smb3_rw_credits(credits->rreq_debug_id, credits->rreq_debug_index, credits->value, server->credits, server->in_flight, 0, cifs_trace_rw_credits_zero_in_flight); } server->in_flight--; if (server->in_flight == 0 && ((optype & CIFS_OP_MASK) != CIFS_NEG_OP) && ((optype & CIFS_OP_MASK) != CIFS_SESS_OP)) rc = change_conf(server); /* * Sometimes server returns 0 credits on oplock break ack - we need to * rebalance credits in this case. */ else if (server->in_flight > 0 && server->oplock_credits == 0 && server->oplocks) { if (server->credits > 1) { server->credits--; server->oplock_credits++; } } else if ((server->in_flight > 0) && (server->oplock_credits > 3) && ((optype & CIFS_OP_MASK) == CIFS_OBREAK_OP)) /* if now have too many oplock credits, rebalance so don't starve normal ops */ change_conf(server); scredits = *val; in_flight = server->in_flight; spin_unlock(&server->req_lock); wake_up(&server->request_q); if (reconnect_detected) { trace_smb3_reconnect_detected(server->CurrentMid, server->conn_id, server->hostname, scredits, add, in_flight); cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n", add, instance); } if (reconnect_with_invalid_credits) { trace_smb3_reconnect_with_invalid_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, add, in_flight); cifs_dbg(FYI, "Negotiate operation when server credits is non-zero. Optype: %d, server credits: %d, credits added: %d\n", optype, scredits, add); } spin_lock(&server->srv_lock); if (server->tcpStatus == CifsNeedReconnect || server->tcpStatus == CifsExiting) { spin_unlock(&server->srv_lock); return; } spin_unlock(&server->srv_lock); switch (rc) { case -1: /* change_conf hasn't been executed */ break; case 0: cifs_server_dbg(VFS, "Possible client or server bug - zero credits\n"); break; case 1: cifs_server_dbg(VFS, "disabling echoes and oplocks\n"); break; case 2: cifs_dbg(FYI, "disabling oplocks\n"); break; default: /* change_conf rebalanced credits for different types */ break; } trace_smb3_add_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, add, in_flight); cifs_dbg(FYI, "%s: added %u credits total=%d\n", __func__, add, scredits); } static void smb2_set_credits(struct TCP_Server_Info *server, const int val) { int scredits, in_flight; spin_lock(&server->req_lock); server->credits = val; if (val == 1) { server->reconnect_instance++; /* * ChannelSequence updated for all channels in primary channel so that consistent * across SMB3 requests sent on any channel. See MS-SMB2 3.2.4.1 and 3.2.7.1 */ if (SERVER_IS_CHAN(server)) server->primary_server->channel_sequence_num++; else server->channel_sequence_num++; } scredits = server->credits; in_flight = server->in_flight; spin_unlock(&server->req_lock); trace_smb3_set_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, val, in_flight); cifs_dbg(FYI, "%s: set %u credits\n", __func__, val); /* don't log while holding the lock */ if (val == 1) cifs_dbg(FYI, "set credits to 1 due to smb2 reconnect\n"); } static int * smb2_get_credits_field(struct TCP_Server_Info *server, const int optype) { switch (optype) { case CIFS_ECHO_OP: return &server->echo_credits; case CIFS_OBREAK_OP: return &server->oplock_credits; default: return &server->credits; } } static unsigned int smb2_get_credits(struct mid_q_entry *mid) { return mid->credits_received; } static int smb2_wait_mtu_credits(struct TCP_Server_Info *server, size_t size, size_t *num, struct cifs_credits *credits) { int rc = 0; unsigned int scredits, in_flight; spin_lock(&server->req_lock); while (1) { spin_unlock(&server->req_lock); spin_lock(&server->srv_lock); if (server->tcpStatus == CifsExiting) { spin_unlock(&server->srv_lock); return -ENOENT; } spin_unlock(&server->srv_lock); spin_lock(&server->req_lock); if (server->credits <= 0) { spin_unlock(&server->req_lock); cifs_num_waiters_inc(server); rc = wait_event_killable(server->request_q, has_credits(server, &server->credits, 1)); cifs_num_waiters_dec(server); if (rc) return rc; spin_lock(&server->req_lock); } else { scredits = server->credits; /* can deadlock with reopen */ if (scredits <= 8) { *num = SMB2_MAX_BUFFER_SIZE; credits->value = 0; credits->instance = 0; break; } /* leave some credits for reopen and other ops */ scredits -= 8; *num = min_t(unsigned int, size, scredits * SMB2_MAX_BUFFER_SIZE); credits->value = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE); credits->instance = server->reconnect_instance; server->credits -= credits->value; server->in_flight++; if (server->in_flight > server->max_in_flight) server->max_in_flight = server->in_flight; break; } } scredits = server->credits; in_flight = server->in_flight; spin_unlock(&server->req_lock); trace_smb3_wait_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, -(credits->value), in_flight); cifs_dbg(FYI, "%s: removed %u credits total=%d\n", __func__, credits->value, scredits); return rc; } static int smb2_adjust_credits(struct TCP_Server_Info *server, struct cifs_io_subrequest *subreq, unsigned int /*enum smb3_rw_credits_trace*/ trace) { struct cifs_credits *credits = &subreq->credits; int new_val = DIV_ROUND_UP(subreq->actual_len, SMB2_MAX_BUFFER_SIZE); int scredits, in_flight; if (!credits->value || credits->value == new_val) return 0; if (credits->value < new_val) { trace_smb3_rw_credits(subreq->rreq->debug_id, subreq->subreq.debug_index, credits->value, server->credits, server->in_flight, new_val - credits->value, cifs_trace_rw_credits_no_adjust_up); trace_smb3_too_many_credits(server->CurrentMid, server->conn_id, server->hostname, 0, credits->value - new_val, 0); cifs_server_dbg(VFS, "R=%x[%x] request has less credits (%d) than required (%d)", subreq->rreq->debug_id, subreq->subreq.debug_index, credits->value, new_val); return -EOPNOTSUPP; } spin_lock(&server->req_lock); if (server->reconnect_instance != credits->instance) { scredits = server->credits; in_flight = server->in_flight; spin_unlock(&server->req_lock); trace_smb3_rw_credits(subreq->rreq->debug_id, subreq->subreq.debug_index, credits->value, server->credits, server->in_flight, new_val - credits->value, cifs_trace_rw_credits_old_session); trace_smb3_reconnect_detected(server->CurrentMid, server->conn_id, server->hostname, scredits, credits->value - new_val, in_flight); cifs_server_dbg(VFS, "R=%x[%x] trying to return %d credits to old session\n", subreq->rreq->debug_id, subreq->subreq.debug_index, credits->value - new_val); return -EAGAIN; } trace_smb3_rw_credits(subreq->rreq->debug_id, subreq->subreq.debug_index, credits->value, server->credits, server->in_flight, new_val - credits->value, trace); server->credits += credits->value - new_val; scredits = server->credits; in_flight = server->in_flight; spin_unlock(&server->req_lock); wake_up(&server->request_q); trace_smb3_adj_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, credits->value - new_val, in_flight); cifs_dbg(FYI, "%s: adjust added %u credits total=%d\n", __func__, credits->value - new_val, scredits); credits->value = new_val; return 0; } static __u64 smb2_get_next_mid(struct TCP_Server_Info *server) { __u64 mid; /* for SMB2 we need the current value */ spin_lock(&server->mid_lock); mid = server->CurrentMid++; spin_unlock(&server->mid_lock); return mid; } static void smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val) { spin_lock(&server->mid_lock); if (server->CurrentMid >= val) server->CurrentMid -= val; spin_unlock(&server->mid_lock); } static struct mid_q_entry * __smb2_find_mid(struct TCP_Server_Info *server, char *buf, bool dequeue) { struct mid_q_entry *mid; struct smb2_hdr *shdr = (struct smb2_hdr *)buf; __u64 wire_mid = le64_to_cpu(shdr->MessageId); if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { cifs_server_dbg(VFS, "Encrypted frame parsing not supported yet\n"); return NULL; } spin_lock(&server->mid_lock); list_for_each_entry(mid, &server->pending_mid_q, qhead) { if ((mid->mid == wire_mid) && (mid->mid_state == MID_REQUEST_SUBMITTED) && (mid->command == shdr->Command)) { kref_get(&mid->refcount); if (dequeue) { list_del_init(&mid->qhead); mid->mid_flags |= MID_DELETED; } spin_unlock(&server->mid_lock); return mid; } } spin_unlock(&server->mid_lock); return NULL; } static struct mid_q_entry * smb2_find_mid(struct TCP_Server_Info *server, char *buf) { return __smb2_find_mid(server, buf, false); } static struct mid_q_entry * smb2_find_dequeue_mid(struct TCP_Server_Info *server, char *buf) { return __smb2_find_mid(server, buf, true); } static void smb2_dump_detail(void *buf, struct TCP_Server_Info *server) { #ifdef CONFIG_CIFS_DEBUG2 struct smb2_hdr *shdr = (struct smb2_hdr *)buf; cifs_server_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Mid: %llu Pid: %d\n", shdr->Command, shdr->Status, shdr->Flags, shdr->MessageId, shdr->Id.SyncId.ProcessId); if (!server->ops->check_message(buf, server->total_read, server)) { cifs_server_dbg(VFS, "smb buf %p len %u\n", buf, server->ops->calc_smb_size(buf)); } #endif } static bool smb2_need_neg(struct TCP_Server_Info *server) { return server->max_read == 0; } static int smb2_negotiate(const unsigned int xid, struct cifs_ses *ses, struct TCP_Server_Info *server) { int rc; spin_lock(&server->mid_lock); server->CurrentMid = 0; spin_unlock(&server->mid_lock); rc = SMB2_negotiate(xid, ses, server); /* BB we probably don't need to retry with modern servers */ if (rc == -EAGAIN) rc = -EHOSTDOWN; return rc; } static unsigned int smb2_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int wsize; /* start with specified wsize, or default */ wsize = ctx->wsize ? ctx->wsize : CIFS_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); return wsize; } static unsigned int smb3_negotiate_wsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int wsize; /* start with specified wsize, or default */ wsize = ctx->wsize ? ctx->wsize : SMB3_DEFAULT_IOSIZE; wsize = min_t(unsigned int, wsize, server->max_write); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) /* * Account for SMB2 data transfer packet header and * possible encryption header */ wsize = min_t(unsigned int, wsize, server->smbd_conn->max_fragmented_send_size - SMB2_READWRITE_PDU_HEADER_SIZE - sizeof(struct smb2_transform_hdr)); else wsize = min_t(unsigned int, wsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) wsize = min_t(unsigned int, wsize, SMB2_MAX_BUFFER_SIZE); return wsize; } static unsigned int smb2_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int rsize; /* start with specified rsize, or default */ rsize = ctx->rsize ? ctx->rsize : CIFS_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); return rsize; } static unsigned int smb3_negotiate_rsize(struct cifs_tcon *tcon, struct smb3_fs_context *ctx) { struct TCP_Server_Info *server = tcon->ses->server; unsigned int rsize; /* start with specified rsize, or default */ rsize = ctx->rsize ? ctx->rsize : SMB3_DEFAULT_IOSIZE; rsize = min_t(unsigned int, rsize, server->max_read); #ifdef CONFIG_CIFS_SMB_DIRECT if (server->rdma) { if (server->sign) /* * Account for SMB2 data transfer packet header and * possible encryption header */ rsize = min_t(unsigned int, rsize, server->smbd_conn->max_fragmented_recv_size - SMB2_READWRITE_PDU_HEADER_SIZE - sizeof(struct smb2_transform_hdr)); else rsize = min_t(unsigned int, rsize, server->smbd_conn->max_readwrite_size); } #endif if (!(server->capabilities & SMB2_GLOBAL_CAP_LARGE_MTU)) rsize = min_t(unsigned int, rsize, SMB2_MAX_BUFFER_SIZE); return rsize; } /* * compare two interfaces a and b * return 0 if everything matches. * return 1 if a is rdma capable, or rss capable, or has higher link speed * return -1 otherwise. */ static int iface_cmp(struct cifs_server_iface *a, struct cifs_server_iface *b) { int cmp_ret = 0; WARN_ON(!a || !b); if (a->rdma_capable == b->rdma_capable) { if (a->rss_capable == b->rss_capable) { if (a->speed == b->speed) { cmp_ret = cifs_ipaddr_cmp((struct sockaddr *) &a->sockaddr, (struct sockaddr *) &b->sockaddr); if (!cmp_ret) return 0; else if (cmp_ret > 0) return 1; else return -1; } else if (a->speed > b->speed) return 1; else return -1; } else if (a->rss_capable > b->rss_capable) return 1; else return -1; } else if (a->rdma_capable > b->rdma_capable) return 1; else return -1; } static int parse_server_interfaces(struct network_interface_info_ioctl_rsp *buf, size_t buf_len, struct cifs_ses *ses, bool in_mount) { struct network_interface_info_ioctl_rsp *p; struct sockaddr_in *addr4; struct sockaddr_in6 *addr6; struct iface_info_ipv4 *p4; struct iface_info_ipv6 *p6; struct cifs_server_iface *info = NULL, *iface = NULL, *niface = NULL; struct cifs_server_iface tmp_iface; ssize_t bytes_left; size_t next = 0; int nb_iface = 0; int rc = 0, ret = 0; bytes_left = buf_len; p = buf; spin_lock(&ses->iface_lock); /* do not query too frequently, this time with lock held */ if (ses->iface_last_update && time_before(jiffies, ses->iface_last_update + (SMB_INTERFACE_POLL_INTERVAL * HZ))) { spin_unlock(&ses->iface_lock); return 0; } /* * Go through iface_list and mark them as inactive */ list_for_each_entry_safe(iface, niface, &ses->iface_list, iface_head) iface->is_active = 0; spin_unlock(&ses->iface_lock); /* * Samba server e.g. can return an empty interface list in some cases, * which would only be a problem if we were requesting multichannel */ if (bytes_left == 0) { /* avoid spamming logs every 10 minutes, so log only in mount */ if ((ses->chan_max > 1) && in_mount) cifs_dbg(VFS, "multichannel not available\n" "Empty network interface list returned by server %s\n", ses->server->hostname); rc = -EOPNOTSUPP; ses->iface_last_update = jiffies; goto out; } while (bytes_left >= (ssize_t)sizeof(*p)) { memset(&tmp_iface, 0, sizeof(tmp_iface)); tmp_iface.speed = le64_to_cpu(p->LinkSpeed); tmp_iface.rdma_capable = le32_to_cpu(p->Capability & RDMA_CAPABLE) ? 1 : 0; tmp_iface.rss_capable = le32_to_cpu(p->Capability & RSS_CAPABLE) ? 1 : 0; switch (p->Family) { /* * The kernel and wire socket structures have the same * layout and use network byte order but make the * conversion explicit in case either one changes. */ case INTERNETWORK: addr4 = (struct sockaddr_in *)&tmp_iface.sockaddr; p4 = (struct iface_info_ipv4 *)p->Buffer; addr4->sin_family = AF_INET; memcpy(&addr4->sin_addr, &p4->IPv4Address, 4); /* [MS-SMB2] 2.2.32.5.1.1 Clients MUST ignore these */ addr4->sin_port = cpu_to_be16(CIFS_PORT); cifs_dbg(FYI, "%s: ipv4 %pI4\n", __func__, &addr4->sin_addr); break; case INTERNETWORKV6: addr6 = (struct sockaddr_in6 *)&tmp_iface.sockaddr; p6 = (struct iface_info_ipv6 *)p->Buffer; addr6->sin6_family = AF_INET6; memcpy(&addr6->sin6_addr, &p6->IPv6Address, 16); /* [MS-SMB2] 2.2.32.5.1.2 Clients MUST ignore these */ addr6->sin6_flowinfo = 0; addr6->sin6_scope_id = 0; addr6->sin6_port = cpu_to_be16(CIFS_PORT); cifs_dbg(FYI, "%s: ipv6 %pI6\n", __func__, &addr6->sin6_addr); break; default: cifs_dbg(VFS, "%s: skipping unsupported socket family\n", __func__); goto next_iface; } /* * The iface_list is assumed to be sorted by speed. * Check if the new interface exists in that list. * NEVER change iface. it could be in use. * Add a new one instead */ spin_lock(&ses->iface_lock); list_for_each_entry_safe(iface, niface, &ses->iface_list, iface_head) { ret = iface_cmp(iface, &tmp_iface); if (!ret) { iface->is_active = 1; spin_unlock(&ses->iface_lock); goto next_iface; } else if (ret < 0) { /* all remaining ifaces are slower */ kref_get(&iface->refcount); break; } } spin_unlock(&ses->iface_lock); /* no match. insert the entry in the list */ info = kmalloc(sizeof(struct cifs_server_iface), GFP_KERNEL); if (!info) { rc = -ENOMEM; goto out; } memcpy(info, &tmp_iface, sizeof(tmp_iface)); /* add this new entry to the list */ kref_init(&info->refcount); info->is_active = 1; cifs_dbg(FYI, "%s: adding iface %zu\n", __func__, ses->iface_count); cifs_dbg(FYI, "%s: speed %zu bps\n", __func__, info->speed); cifs_dbg(FYI, "%s: capabilities 0x%08x\n", __func__, le32_to_cpu(p->Capability)); spin_lock(&ses->iface_lock); if (!list_entry_is_head(iface, &ses->iface_list, iface_head)) { list_add_tail(&info->iface_head, &iface->iface_head); kref_put(&iface->refcount, release_iface); } else list_add_tail(&info->iface_head, &ses->iface_list); ses->iface_count++; spin_unlock(&ses->iface_lock); next_iface: nb_iface++; next = le32_to_cpu(p->Next); if (!next) { bytes_left -= sizeof(*p); break; } p = (struct network_interface_info_ioctl_rsp *)((u8 *)p+next); bytes_left -= next; } if (!nb_iface) { cifs_dbg(VFS, "%s: malformed interface info\n", __func__); rc = -EINVAL; goto out; } /* Azure rounds the buffer size up 8, to a 16 byte boundary */ if ((bytes_left > 8) || p->Next) cifs_dbg(VFS, "%s: incomplete interface info\n", __func__); ses->iface_last_update = jiffies; out: /* * Go through the list again and put the inactive entries */ spin_lock(&ses->iface_lock); list_for_each_entry_safe(iface, niface, &ses->iface_list, iface_head) { if (!iface->is_active) { list_del(&iface->iface_head); kref_put(&iface->refcount, release_iface); ses->iface_count--; } } spin_unlock(&ses->iface_lock); return rc; } int SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_mount) { int rc; unsigned int ret_data_len = 0; struct network_interface_info_ioctl_rsp *out_buf = NULL; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *pserver; /* do not query too frequently */ if (ses->iface_last_update && time_before(jiffies, ses->iface_last_update + (SMB_INTERFACE_POLL_INTERVAL * HZ))) return 0; rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, FSCTL_QUERY_NETWORK_INTERFACE_INFO, NULL /* no data input */, 0 /* no data input */, CIFSMaxBufSize, (char **)&out_buf, &ret_data_len); if (rc == -EOPNOTSUPP) { cifs_dbg(FYI, "server does not support query network interfaces\n"); ret_data_len = 0; } else if (rc != 0) { cifs_tcon_dbg(VFS, "error %d on ioctl to get interface list\n", rc); goto out; } rc = parse_server_interfaces(out_buf, ret_data_len, ses, in_mount); if (rc) goto out; /* check if iface is still active */ spin_lock(&ses->chan_lock); pserver = ses->chans[0].server; if (pserver && !cifs_chan_is_iface_active(ses, pserver)) { spin_unlock(&ses->chan_lock); cifs_chan_update_iface(ses, pserver); spin_lock(&ses->chan_lock); } spin_unlock(&ses->chan_lock); out: kfree(out_buf); return rc; } static void smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; struct cached_fid *cfid = NULL; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = "", .desired_access = FILE_READ_ATTRIBUTES, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, }; rc = open_cached_dir(xid, tcon, "", cifs_sb, false, &cfid); if (rc == 0) memcpy(&fid, &cfid->fid, sizeof(struct cifs_fid)); else rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL, NULL); if (rc) return; SMB3_request_interfaces(xid, tcon, true /* called during mount */); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_ATTRIBUTE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_DEVICE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_VOLUME_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_SECTOR_SIZE_INFORMATION); /* SMB3 specific */ if (cfid == NULL) SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); else close_cached_dir(cfid); } static void smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = "", .desired_access = FILE_READ_ATTRIBUTES, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, }; rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL, NULL); if (rc) return; SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_ATTRIBUTE_INFORMATION); SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid, FS_DEVICE_INFORMATION); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } static int smb2_is_path_accessible(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path) { __le16 *utf16_path; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; int err_buftype = CIFS_NO_BUFFER; struct cifs_open_parms oparms; struct kvec err_iov = {}; struct cifs_fid fid; struct cached_fid *cfid; bool islink; int rc, rc2; rc = open_cached_dir(xid, tcon, full_path, cifs_sb, true, &cfid); if (!rc) { if (cfid->has_lease) { close_cached_dir(cfid); return 0; } close_cached_dir(cfid); } utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); if (!utf16_path) return -ENOMEM; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = full_path, .desired_access = FILE_READ_ATTRIBUTES, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, }; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, &err_iov, &err_buftype); if (rc) { struct smb2_hdr *hdr = err_iov.iov_base; if (unlikely(!hdr || err_buftype == CIFS_NO_BUFFER)) goto out; if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, full_path, &islink); if (rc2) { rc = rc2; goto out; } if (islink) rc = -EREMOTE; } if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) rc = -EOPNOTSUPP; goto out; } rc = SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); out: free_rsp_buf(err_buftype, err_iov.iov_base); kfree(utf16_path); return rc; } static int smb2_get_srv_inum(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, const char *full_path, u64 *uniqueid, struct cifs_open_info_data *data) { *uniqueid = le64_to_cpu(data->fi.IndexNumber); return 0; } static int smb2_query_file_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, struct cifs_open_info_data *data) { struct cifs_fid *fid = &cfile->fid; if (cfile->symlink_target) { data->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); if (!data->symlink_target) return -ENOMEM; } return SMB2_query_info(xid, tcon, fid->persistent_fid, fid->volatile_fid, &data->fi); } #ifdef CONFIG_CIFS_XATTR static ssize_t move_smb2_ea_to_cifs(char *dst, size_t dst_size, struct smb2_file_full_ea_info *src, size_t src_size, const unsigned char *ea_name) { int rc = 0; unsigned int ea_name_len = ea_name ? strlen(ea_name) : 0; char *name, *value; size_t buf_size = dst_size; size_t name_len, value_len, user_name_len; while (src_size > 0) { name_len = (size_t)src->ea_name_length; value_len = (size_t)le16_to_cpu(src->ea_value_length); if (name_len == 0) break; if (src_size < 8 + name_len + 1 + value_len) { cifs_dbg(FYI, "EA entry goes beyond length of list\n"); rc = -EIO; goto out; } name = &src->ea_data[0]; value = &src->ea_data[src->ea_name_length + 1]; if (ea_name) { if (ea_name_len == name_len && memcmp(ea_name, name, name_len) == 0) { rc = value_len; if (dst_size == 0) goto out; if (dst_size < value_len) { rc = -ERANGE; goto out; } memcpy(dst, value, value_len); goto out; } } else { /* 'user.' plus a terminating null */ user_name_len = 5 + 1 + name_len; if (buf_size == 0) { /* skip copy - calc size only */ rc += user_name_len; } else if (dst_size >= user_name_len) { dst_size -= user_name_len; memcpy(dst, "user.", 5); dst += 5; memcpy(dst, src->ea_data, name_len); dst += name_len; *dst = 0; ++dst; rc += user_name_len; } else { /* stop before overrun buffer */ rc = -ERANGE; break; } } if (!src->next_entry_offset) break; if (src_size < le32_to_cpu(src->next_entry_offset)) { /* stop before overrun buffer */ rc = -ERANGE; break; } src_size -= le32_to_cpu(src->next_entry_offset); src = (void *)((char *)src + le32_to_cpu(src->next_entry_offset)); } /* didn't find the named attribute */ if (ea_name) rc = -ENODATA; out: return (ssize_t)rc; } static ssize_t smb2_query_eas(const unsigned int xid, struct cifs_tcon *tcon, const unsigned char *path, const unsigned char *ea_name, char *ea_data, size_t buf_size, struct cifs_sb_info *cifs_sb) { int rc; struct kvec rsp_iov = {NULL, 0}; int buftype = CIFS_NO_BUFFER; struct smb2_query_info_rsp *rsp; struct smb2_file_full_ea_info *info = NULL; rc = smb2_query_info_compound(xid, tcon, path, FILE_READ_EA, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - MAX_SMB2_CLOSE_RESPONSE_SIZE, &rsp_iov, &buftype, cifs_sb); if (rc) { /* * If ea_name is NULL (listxattr) and there are no EAs, * return 0 as it's not an error. Otherwise, the specified * ea_name was not found. */ if (!ea_name && rc == -ENODATA) rc = 0; goto qeas_exit; } rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, sizeof(struct smb2_file_full_ea_info)); if (rc) goto qeas_exit; info = (struct smb2_file_full_ea_info *)( le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); rc = move_smb2_ea_to_cifs(ea_data, buf_size, info, le32_to_cpu(rsp->OutputBufferLength), ea_name); qeas_exit: free_rsp_buf(buftype, rsp_iov.iov_base); return rc; } static int smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon, const char *path, const char *ea_name, const void *ea_value, const __u16 ea_value_len, const struct nls_table *nls_codepage, struct cifs_sb_info *cifs_sb) { struct smb2_compound_vars *vars; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server; struct smb_rqst *rqst; struct kvec *rsp_iov; __le16 *utf16_path = NULL; int ea_name_len = strlen(ea_name); int flags = CIFS_CP_CREATE_CLOSE_OP; int len; int resp_buftype[3]; struct cifs_open_parms oparms; __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_fid fid; unsigned int size[1]; void *data[1]; struct smb2_file_full_ea_info *ea = NULL; struct smb2_query_info_rsp *rsp; int rc, used_len = 0; int retries = 0, cur_sleep = 1; replay_again: /* reinitialize for possible replay */ flags = CIFS_CP_CREATE_CLOSE_OP; oplock = SMB2_OPLOCK_LEVEL_NONE; server = cifs_pick_channel(ses); if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; if (ea_name_len > 255) return -EINVAL; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; vars = kzalloc(sizeof(*vars), GFP_KERNEL); if (!vars) { rc = -ENOMEM; goto out_free_path; } rqst = vars->rqst; rsp_iov = vars->rsp_iov; if (ses->server->ops->query_all_EAs) { if (!ea_value) { rc = ses->server->ops->query_all_EAs(xid, tcon, path, ea_name, NULL, 0, cifs_sb); if (rc == -ENODATA) goto sea_exit; } else { /* If we are adding a attribute we should first check * if there will be enough space available to store * the new EA. If not we should not add it since we * would not be able to even read the EAs back. */ rc = smb2_query_info_compound(xid, tcon, path, FILE_READ_EA, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - MAX_SMB2_CLOSE_RESPONSE_SIZE, &rsp_iov[1], &resp_buftype[1], cifs_sb); if (rc == 0) { rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; used_len = le32_to_cpu(rsp->OutputBufferLength); } free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); resp_buftype[1] = CIFS_NO_BUFFER; memset(&rsp_iov[1], 0, sizeof(rsp_iov[1])); rc = 0; /* Use a fudge factor of 256 bytes in case we collide * with a different set_EAs command. */ if (CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - MAX_SMB2_CLOSE_RESPONSE_SIZE - 256 < used_len + ea_name_len + ea_value_len + 1) { rc = -ENOSPC; goto sea_exit; } } } /* Open */ rqst[0].rq_iov = vars->open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = path, .desired_access = FILE_WRITE_EA, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, .replay = !!(retries), }; rc = SMB2_open_init(tcon, server, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto sea_exit; smb2_set_next_command(tcon, &rqst[0]); /* Set Info */ rqst[1].rq_iov = vars->si_iov; rqst[1].rq_nvec = 1; len = sizeof(*ea) + ea_name_len + ea_value_len + 1; ea = kzalloc(len, GFP_KERNEL); if (ea == NULL) { rc = -ENOMEM; goto sea_exit; } ea->ea_name_length = ea_name_len; ea->ea_value_length = cpu_to_le16(ea_value_len); memcpy(ea->ea_data, ea_name, ea_name_len + 1); memcpy(ea->ea_data + ea_name_len + 1, ea_value, ea_value_len); size[0] = len; data[0] = ea; rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, current->tgid, FILE_FULL_EA_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); if (rc) goto sea_exit; smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); /* Close */ rqst[2].rq_iov = &vars->close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, server, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto sea_exit; smb2_set_related(&rqst[2]); if (retries) { smb2_set_replay(server, &rqst[0]); smb2_set_replay(server, &rqst[1]); smb2_set_replay(server, &rqst[2]); } rc = compound_send_recv(xid, ses, server, flags, 3, rqst, resp_buftype, rsp_iov); /* no need to bump num_remote_opens because handle immediately closed */ sea_exit: kfree(ea); SMB2_open_free(&rqst[0]); SMB2_set_info_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); kfree(vars); out_free_path: kfree(utf16_path); if (is_replayable_error(rc) && smb2_should_replay(tcon, &retries, &cur_sleep)) goto replay_again; return rc; } #endif static bool smb2_can_echo(struct TCP_Server_Info *server) { return server->echoes; } static void smb2_clear_stats(struct cifs_tcon *tcon) { int i; for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0); atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0); } } static void smb2_dump_share_caps(struct seq_file *m, struct cifs_tcon *tcon) { seq_puts(m, "\n\tShare Capabilities:"); if (tcon->capabilities & SMB2_SHARE_CAP_DFS) seq_puts(m, " DFS,"); if (tcon->capabilities & SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY) seq_puts(m, " CONTINUOUS AVAILABILITY,"); if (tcon->capabilities & SMB2_SHARE_CAP_SCALEOUT) seq_puts(m, " SCALEOUT,"); if (tcon->capabilities & SMB2_SHARE_CAP_CLUSTER) seq_puts(m, " CLUSTER,"); if (tcon->capabilities & SMB2_SHARE_CAP_ASYMMETRIC) seq_puts(m, " ASYMMETRIC,"); if (tcon->capabilities == 0) seq_puts(m, " None"); if (tcon->ss_flags & SSINFO_FLAGS_ALIGNED_DEVICE) seq_puts(m, " Aligned,"); if (tcon->ss_flags & SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE) seq_puts(m, " Partition Aligned,"); if (tcon->ss_flags & SSINFO_FLAGS_NO_SEEK_PENALTY) seq_puts(m, " SSD,"); if (tcon->ss_flags & SSINFO_FLAGS_TRIM_ENABLED) seq_puts(m, " TRIM-support,"); seq_printf(m, "\tShare Flags: 0x%x", tcon->share_flags); seq_printf(m, "\n\ttid: 0x%x", tcon->tid); if (tcon->perf_sector_size) seq_printf(m, "\tOptimal sector size: 0x%x", tcon->perf_sector_size); seq_printf(m, "\tMaximal Access: 0x%x", tcon->maximal_access); } static void smb2_print_stats(struct seq_file *m, struct cifs_tcon *tcon) { atomic_t *sent = tcon->stats.smb2_stats.smb2_com_sent; atomic_t *failed = tcon->stats.smb2_stats.smb2_com_failed; /* * Can't display SMB2_NEGOTIATE, SESSION_SETUP, LOGOFF, CANCEL and ECHO * totals (requests sent) since those SMBs are per-session not per tcon */ seq_printf(m, "\nBytes read: %llu Bytes written: %llu", (long long)(tcon->bytes_read), (long long)(tcon->bytes_written)); seq_printf(m, "\nOpen files: %d total (local), %d open on server", atomic_read(&tcon->num_local_opens), atomic_read(&tcon->num_remote_opens)); seq_printf(m, "\nTreeConnects: %d total %d failed", atomic_read(&sent[SMB2_TREE_CONNECT_HE]), atomic_read(&failed[SMB2_TREE_CONNECT_HE])); seq_printf(m, "\nTreeDisconnects: %d total %d failed", atomic_read(&sent[SMB2_TREE_DISCONNECT_HE]), atomic_read(&failed[SMB2_TREE_DISCONNECT_HE])); seq_printf(m, "\nCreates: %d total %d failed", atomic_read(&sent[SMB2_CREATE_HE]), atomic_read(&failed[SMB2_CREATE_HE])); seq_printf(m, "\nCloses: %d total %d failed", atomic_read(&sent[SMB2_CLOSE_HE]), atomic_read(&failed[SMB2_CLOSE_HE])); seq_printf(m, "\nFlushes: %d total %d failed", atomic_read(&sent[SMB2_FLUSH_HE]), atomic_read(&failed[SMB2_FLUSH_HE])); seq_printf(m, "\nReads: %d total %d failed", atomic_read(&sent[SMB2_READ_HE]), atomic_read(&failed[SMB2_READ_HE])); seq_printf(m, "\nWrites: %d total %d failed", atomic_read(&sent[SMB2_WRITE_HE]), atomic_read(&failed[SMB2_WRITE_HE])); seq_printf(m, "\nLocks: %d total %d failed", atomic_read(&sent[SMB2_LOCK_HE]), atomic_read(&failed[SMB2_LOCK_HE])); seq_printf(m, "\nIOCTLs: %d total %d failed", atomic_read(&sent[SMB2_IOCTL_HE]), atomic_read(&failed[SMB2_IOCTL_HE])); seq_printf(m, "\nQueryDirectories: %d total %d failed", atomic_read(&sent[SMB2_QUERY_DIRECTORY_HE]), atomic_read(&failed[SMB2_QUERY_DIRECTORY_HE])); seq_printf(m, "\nChangeNotifies: %d total %d failed", atomic_read(&sent[SMB2_CHANGE_NOTIFY_HE]), atomic_read(&failed[SMB2_CHANGE_NOTIFY_HE])); seq_printf(m, "\nQueryInfos: %d total %d failed", atomic_read(&sent[SMB2_QUERY_INFO_HE]), atomic_read(&failed[SMB2_QUERY_INFO_HE])); seq_printf(m, "\nSetInfos: %d total %d failed", atomic_read(&sent[SMB2_SET_INFO_HE]), atomic_read(&failed[SMB2_SET_INFO_HE])); seq_printf(m, "\nOplockBreaks: %d sent %d failed", atomic_read(&sent[SMB2_OPLOCK_BREAK_HE]), atomic_read(&failed[SMB2_OPLOCK_BREAK_HE])); } static void smb2_set_fid(struct cifsFileInfo *cfile, struct cifs_fid *fid, __u32 oplock) { struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; cfile->fid.persistent_fid = fid->persistent_fid; cfile->fid.volatile_fid = fid->volatile_fid; cfile->fid.access = fid->access; #ifdef CONFIG_CIFS_DEBUG2 cfile->fid.mid = fid->mid; #endif /* CIFS_DEBUG2 */ server->ops->set_oplock_level(cinode, oplock, fid->epoch, &fid->purge_cache); cinode->can_cache_brlcks = CIFS_CACHE_WRITE(cinode); memcpy(cfile->fid.create_guid, fid->create_guid, 16); } static int smb2_close_file(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } static int smb2_close_getattr(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) { struct smb2_file_network_open_info file_inf; struct inode *inode; int rc; rc = __SMB2_close(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, &file_inf); if (rc) return rc; inode = d_inode(cfile->dentry); spin_lock(&inode->i_lock); CIFS_I(inode)->time = jiffies; /* Creation time should not need to be updated on close */ if (file_inf.LastWriteTime) inode_set_mtime_to_ts(inode, cifs_NTtimeToUnix(file_inf.LastWriteTime)); if (file_inf.ChangeTime) inode_set_ctime_to_ts(inode, cifs_NTtimeToUnix(file_inf.ChangeTime)); if (file_inf.LastAccessTime) inode_set_atime_to_ts(inode, cifs_NTtimeToUnix(file_inf.LastAccessTime)); /* * i_blocks is not related to (i_size / i_blksize), * but instead 512 byte (2**9) size is required for * calculating num blocks. */ if (le64_to_cpu(file_inf.AllocationSize) > 4096) inode->i_blocks = (512 - 1 + le64_to_cpu(file_inf.AllocationSize)) >> 9; /* End of file and Attributes should not have to be updated on close */ spin_unlock(&inode->i_lock); return rc; } static int SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid, u64 volatile_fid, struct copychunk_ioctl *pcchunk) { int rc; unsigned int ret_data_len; struct resume_key_req *res_key; rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid, FSCTL_SRV_REQUEST_RESUME_KEY, NULL, 0 /* no input */, CIFSMaxBufSize, (char **)&res_key, &ret_data_len); if (rc == -EOPNOTSUPP) { pr_warn_once("Server share %s does not support copy range\n", tcon->tree_name); goto req_res_key_exit; } else if (rc) { cifs_tcon_dbg(VFS, "refcpy ioctl error %d getting resume key\n", rc); goto req_res_key_exit; } if (ret_data_len < sizeof(struct resume_key_req)) { cifs_tcon_dbg(VFS, "Invalid refcopy resume key length\n"); rc = -EINVAL; goto req_res_key_exit; } memcpy(pcchunk->SourceKey, res_key->ResumeKey, COPY_CHUNK_RES_KEY_SIZE); req_res_key_exit: kfree(res_key); return rc; } static int smb2_ioctl_query_info(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, __le16 *path, int is_dir, unsigned long p) { struct smb2_compound_vars *vars; struct smb_rqst *rqst; struct kvec *rsp_iov; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server; char __user *arg = (char __user *)p; struct smb_query_info qi; struct smb_query_info __user *pqi; int rc = 0; int flags = CIFS_CP_CREATE_CLOSE_OP; struct smb2_query_info_rsp *qi_rsp = NULL; struct smb2_ioctl_rsp *io_rsp = NULL; void *buffer = NULL; int resp_buftype[3]; struct cifs_open_parms oparms; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_fid fid; unsigned int size[2]; void *data[2]; int create_options = is_dir ? CREATE_NOT_FILE : CREATE_NOT_DIR; void (*free_req1_func)(struct smb_rqst *r); int retries = 0, cur_sleep = 1; replay_again: /* reinitialize for possible replay */ flags = CIFS_CP_CREATE_CLOSE_OP; oplock = SMB2_OPLOCK_LEVEL_NONE; server = cifs_pick_channel(ses); vars = kzalloc(sizeof(*vars), GFP_ATOMIC); if (vars == NULL) return -ENOMEM; rqst = &vars->rqst[0]; rsp_iov = &vars->rsp_iov[0]; resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; if (copy_from_user(&qi, arg, sizeof(struct smb_query_info))) { rc = -EFAULT; goto free_vars; } if (qi.output_buffer_length > 1024) { rc = -EINVAL; goto free_vars; } if (!ses || !server) { rc = -EIO; goto free_vars; } if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; if (qi.output_buffer_length) { buffer = memdup_user(arg + sizeof(struct smb_query_info), qi.output_buffer_length); if (IS_ERR(buffer)) { rc = PTR_ERR(buffer); goto free_vars; } } /* Open */ rqst[0].rq_iov = &vars->open_iov[0]; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms = (struct cifs_open_parms) { .tcon = tcon, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, create_options), .fid = &fid, .replay = !!(retries), }; if (qi.flags & PASSTHRU_FSCTL) { switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) { case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS: oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE; break; case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS: oparms.desired_access = GENERIC_ALL; break; case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS: oparms.desired_access = GENERIC_READ; break; case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS: oparms.desired_access = GENERIC_WRITE; break; } } else if (qi.flags & PASSTHRU_SET_INFO) { oparms.desired_access = GENERIC_WRITE; } else { oparms.desired_access = FILE_READ_ATTRIBUTES | READ_CONTROL; } rc = SMB2_open_init(tcon, server, &rqst[0], &oplock, &oparms, path); if (rc) goto free_output_buffer; smb2_set_next_command(tcon, &rqst[0]); /* Query */ if (qi.flags & PASSTHRU_FSCTL) { /* Can eventually relax perm check since server enforces too */ if (!capable(CAP_SYS_ADMIN)) { rc = -EPERM; goto free_open_req; } rqst[1].rq_iov = &vars->io_iov[0]; rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE; rc = SMB2_ioctl_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, qi.info_type, buffer, qi.output_buffer_length, CIFSMaxBufSize - MAX_SMB2_CREATE_RESPONSE_SIZE - MAX_SMB2_CLOSE_RESPONSE_SIZE); free_req1_func = SMB2_ioctl_free; } else if (qi.flags == PASSTHRU_SET_INFO) { /* Can eventually relax perm check since server enforces too */ if (!capable(CAP_SYS_ADMIN)) { rc = -EPERM; goto free_open_req; } if (qi.output_buffer_length < 8) { rc = -EINVAL; goto free_open_req; } rqst[1].rq_iov = vars->si_iov; rqst[1].rq_nvec = 1; /* MS-FSCC 2.4.13 FileEndOfFileInformation */ size[0] = 8; data[0] = buffer; rc = SMB2_set_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, current->tgid, FILE_END_OF_FILE_INFORMATION, SMB2_O_INFO_FILE, 0, data, size); free_req1_func = SMB2_set_info_free; } else if (qi.flags == PASSTHRU_QUERY_INFO) { rqst[1].rq_iov = &vars->qi_iov; rqst[1].rq_nvec = 1; rc = SMB2_query_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, qi.file_info_class, qi.info_type, qi.additional_information, qi.input_buffer_length, qi.output_buffer_length, buffer); free_req1_func = SMB2_query_info_free; } else { /* unknown flags */ cifs_tcon_dbg(VFS, "Invalid passthru query flags: 0x%x\n", qi.flags); rc = -EINVAL; } if (rc) goto free_open_req; smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); /* Close */ rqst[2].rq_iov = &vars->close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, server, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto free_req_1; smb2_set_related(&rqst[2]); if (retries) { smb2_set_replay(server, &rqst[0]); smb2_set_replay(server, &rqst[1]); smb2_set_replay(server, &rqst[2]); } rc = compound_send_recv(xid, ses, server, flags, 3, rqst, resp_buftype, rsp_iov); if (rc) goto out; /* No need to bump num_remote_opens since handle immediately closed */ if (qi.flags & PASSTHRU_FSCTL) { pqi = (struct smb_query_info __user *)arg; io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount); if (qi.input_buffer_length > 0 && le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) { rc = -EFAULT; goto out; } if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, sizeof(qi.input_buffer_length))) { rc = -EFAULT; goto out; } if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info), (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset), qi.input_buffer_length)) rc = -EFAULT; } else { pqi = (struct smb_query_info __user *)arg; qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base; if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length) qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength); if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length, sizeof(qi.input_buffer_length))) { rc = -EFAULT; goto out; } if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) rc = -EFAULT; } out: free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); SMB2_close_free(&rqst[2]); free_req_1: free_req1_func(&rqst[1]); free_open_req: SMB2_open_free(&rqst[0]); free_output_buffer: kfree(buffer); free_vars: kfree(vars); if (is_replayable_error(rc) && smb2_should_replay(tcon, &retries, &cur_sleep)) goto replay_again; return rc; } static ssize_t smb2_copychunk_range(const unsigned int xid, struct cifsFileInfo *srcfile, struct cifsFileInfo *trgtfile, u64 src_off, u64 len, u64 dest_off) { int rc; unsigned int ret_data_len; struct copychunk_ioctl *pcchunk; struct copychunk_ioctl_rsp *retbuf = NULL; struct cifs_tcon *tcon; int chunks_copied = 0; bool chunk_sizes_updated = false; ssize_t bytes_written, total_bytes_written = 0; pcchunk = kmalloc(sizeof(struct copychunk_ioctl), GFP_KERNEL); if (pcchunk == NULL) return -ENOMEM; cifs_dbg(FYI, "%s: about to call request res key\n", __func__); /* Request a key from the server to identify the source of the copy */ rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink), srcfile->fid.persistent_fid, srcfile->fid.volatile_fid, pcchunk); /* Note: request_res_key sets res_key null only if rc !=0 */ if (rc) goto cchunk_out; /* For now array only one chunk long, will make more flexible later */ pcchunk->ChunkCount = cpu_to_le32(1); pcchunk->Reserved = 0; pcchunk->Reserved2 = 0; tcon = tlink_tcon(trgtfile->tlink); trace_smb3_copychunk_enter(xid, srcfile->fid.volatile_fid, trgtfile->fid.volatile_fid, tcon->tid, tcon->ses->Suid, src_off, dest_off, len); while (len > 0) { pcchunk->SourceOffset = cpu_to_le64(src_off); pcchunk->TargetOffset = cpu_to_le64(dest_off); pcchunk->Length = cpu_to_le32(min_t(u64, len, tcon->max_bytes_chunk)); /* Request server copy to target from src identified by key */ kfree(retbuf); retbuf = NULL; rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE, (char *)pcchunk, sizeof(struct copychunk_ioctl), CIFSMaxBufSize, (char **)&retbuf, &ret_data_len); if (rc == 0) { if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) { cifs_tcon_dbg(VFS, "Invalid cchunk response size\n"); rc = -EIO; goto cchunk_out; } if (retbuf->TotalBytesWritten == 0) { cifs_dbg(FYI, "no bytes copied\n"); rc = -EIO; goto cchunk_out; } /* * Check if server claimed to write more than we asked */ if (le32_to_cpu(retbuf->TotalBytesWritten) > le32_to_cpu(pcchunk->Length)) { cifs_tcon_dbg(VFS, "Invalid copy chunk response\n"); rc = -EIO; goto cchunk_out; } if (le32_to_cpu(retbuf->ChunksWritten) != 1) { cifs_tcon_dbg(VFS, "Invalid num chunks written\n"); rc = -EIO; goto cchunk_out; } chunks_copied++; bytes_written = le32_to_cpu(retbuf->TotalBytesWritten); src_off += bytes_written; dest_off += bytes_written; len -= bytes_written; total_bytes_written += bytes_written; cifs_dbg(FYI, "Chunks %d PartialChunk %d Total %zu\n", le32_to_cpu(retbuf->ChunksWritten), le32_to_cpu(retbuf->ChunkBytesWritten), bytes_written); trace_smb3_copychunk_done(xid, srcfile->fid.volatile_fid, trgtfile->fid.volatile_fid, tcon->tid, tcon->ses->Suid, src_off, dest_off, len); } else if (rc == -EINVAL) { if (ret_data_len != sizeof(struct copychunk_ioctl_rsp)) goto cchunk_out; cifs_dbg(FYI, "MaxChunks %d BytesChunk %d MaxCopy %d\n", le32_to_cpu(retbuf->ChunksWritten), le32_to_cpu(retbuf->ChunkBytesWritten), le32_to_cpu(retbuf->TotalBytesWritten)); /* * Check if this is the first request using these sizes, * (ie check if copy succeed once with original sizes * and check if the server gave us different sizes after * we already updated max sizes on previous request). * if not then why is the server returning an error now */ if ((chunks_copied != 0) || chunk_sizes_updated) goto cchunk_out; /* Check that server is not asking us to grow size */ if (le32_to_cpu(retbuf->ChunkBytesWritten) < tcon->max_bytes_chunk) tcon->max_bytes_chunk = le32_to_cpu(retbuf->ChunkBytesWritten); else goto cchunk_out; /* server gave us bogus size */ /* No need to change MaxChunks since already set to 1 */ chunk_sizes_updated = true; } else goto cchunk_out; } cchunk_out: kfree(pcchunk); kfree(retbuf); if (rc) return rc; else return total_bytes_written; } static int smb2_flush_file(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { return SMB2_flush(xid, tcon, fid->persistent_fid, fid->volatile_fid); } static unsigned int smb2_read_data_offset(char *buf) { struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; return rsp->DataOffset; } static unsigned int smb2_read_data_length(char *buf, bool in_remaining) { struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf; if (in_remaining) return le32_to_cpu(rsp->DataRemaining); return le32_to_cpu(rsp->DataLength); } static int smb2_sync_read(const unsigned int xid, struct cifs_fid *pfid, struct cifs_io_parms *parms, unsigned int *bytes_read, char **buf, int *buf_type) { parms->persistent_fid = pfid->persistent_fid; parms->volatile_fid = pfid->volatile_fid; return SMB2_read(xid, parms, bytes_read, buf, buf_type); } static int smb2_sync_write(const unsigned int xid, struct cifs_fid *pfid, struct cifs_io_parms *parms, unsigned int *written, struct kvec *iov, unsigned long nr_segs) { parms->persistent_fid = pfid->persistent_fid; parms->volatile_fid = pfid->volatile_fid; return SMB2_write(xid, parms, written, iov, nr_segs); } /* Set or clear the SPARSE_FILE attribute based on value passed in setsparse */ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, struct inode *inode, __u8 setsparse) { struct cifsInodeInfo *cifsi; int rc; cifsi = CIFS_I(inode); /* if file already sparse don't bother setting sparse again */ if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && setsparse) return true; /* already sparse */ if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) && !setsparse) return true; /* already not sparse */ /* * Can't check for sparse support on share the usual way via the * FS attribute info (FILE_SUPPORTS_SPARSE_FILES) on the share * since Samba server doesn't set the flag on the share, yet * supports the set sparse FSCTL and returns sparse correctly * in the file attributes. If we fail setting sparse though we * mark that server does not support sparse files for this share * to avoid repeatedly sending the unsupported fsctl to server * if the file is repeatedly extended. */ if (tcon->broken_sparse_sup) return false; rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_SPARSE, &setsparse, 1, CIFSMaxBufSize, NULL, NULL); if (rc) { tcon->broken_sparse_sup = true; cifs_dbg(FYI, "set sparse rc = %d\n", rc); return false; } if (setsparse) cifsi->cifsAttrs |= FILE_ATTRIBUTE_SPARSE_FILE; else cifsi->cifsAttrs &= (~FILE_ATTRIBUTE_SPARSE_FILE); return true; } static int smb2_set_file_size(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, __u64 size, bool set_alloc) { struct inode *inode; /* * If extending file more than one page make sparse. Many Linux fs * make files sparse by default when extending via ftruncate */ inode = d_inode(cfile->dentry); if (!set_alloc && (size > inode->i_size + 8192)) { __u8 set_sparse = 1; /* whether set sparse succeeds or not, extend the file */ smb2_set_sparse(xid, tcon, cfile, inode, set_sparse); } return SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, size); } static int smb2_duplicate_extents(const unsigned int xid, struct cifsFileInfo *srcfile, struct cifsFileInfo *trgtfile, u64 src_off, u64 len, u64 dest_off) { int rc; unsigned int ret_data_len; struct inode *inode; struct duplicate_extents_to_file dup_ext_buf; struct cifs_tcon *tcon = tlink_tcon(trgtfile->tlink); /* server fileays advertise duplicate extent support with this flag */ if ((le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_BLOCK_REFCOUNTING) == 0) return -EOPNOTSUPP; dup_ext_buf.VolatileFileHandle = srcfile->fid.volatile_fid; dup_ext_buf.PersistentFileHandle = srcfile->fid.persistent_fid; dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off); dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off); dup_ext_buf.ByteCount = cpu_to_le64(len); cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n", src_off, dest_off, len); trace_smb3_clone_enter(xid, srcfile->fid.volatile_fid, trgtfile->fid.volatile_fid, tcon->tid, tcon->ses->Suid, src_off, dest_off, len); inode = d_inode(trgtfile->dentry); if (inode->i_size < dest_off + len) { rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false); if (rc) goto duplicate_extents_out; /* * Although also could set plausible allocation size (i_blocks) * here in addition to setting the file size, in reflink * it is likely that the target file is sparse. Its allocation * size will be queried on next revalidate, but it is important * to make sure that file's cached size is updated immediately */ netfs_resize_file(netfs_inode(inode), dest_off + len, true); cifs_setsize(inode, dest_off + len); } rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid, trgtfile->fid.volatile_fid, FSCTL_DUPLICATE_EXTENTS_TO_FILE, (char *)&dup_ext_buf, sizeof(struct duplicate_extents_to_file), CIFSMaxBufSize, NULL, &ret_data_len); if (ret_data_len > 0) cifs_dbg(FYI, "Non-zero response length in duplicate extents\n"); duplicate_extents_out: if (rc) trace_smb3_clone_err(xid, srcfile->fid.volatile_fid, trgtfile->fid.volatile_fid, tcon->tid, tcon->ses->Suid, src_off, dest_off, len, rc); else trace_smb3_clone_done(xid, srcfile->fid.volatile_fid, trgtfile->fid.volatile_fid, tcon->tid, tcon->ses->Suid, src_off, dest_off, len); return rc; } static int smb2_set_compression(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) { return SMB2_set_compression(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid); } static int smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile) { struct fsctl_set_integrity_information_req integr_info; unsigned int ret_data_len; integr_info.ChecksumAlgorithm = cpu_to_le16(CHECKSUM_TYPE_UNCHANGED); integr_info.Flags = 0; integr_info.Reserved = 0; return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_INTEGRITY_INFORMATION, (char *)&integr_info, sizeof(struct fsctl_set_integrity_information_req), CIFSMaxBufSize, NULL, &ret_data_len); } /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */ #define GMT_TOKEN_SIZE 50 #define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */ /* * Input buffer contains (empty) struct smb_snapshot array with size filled in * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2 */ static int smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, void __user *ioc_buf) { char *retbuf = NULL; unsigned int ret_data_len = 0; int rc; u32 max_response_size; struct smb_snapshot_array snapshot_in; /* * On the first query to enumerate the list of snapshots available * for this volume the buffer begins with 0 (number of snapshots * which can be returned is zero since at that point we do not know * how big the buffer needs to be). On the second query, * it (ret_data_len) is set to number of snapshots so we can * know to set the maximum response size larger (see below). */ if (get_user(ret_data_len, (unsigned int __user *)ioc_buf)) return -EFAULT; /* * Note that for snapshot queries that servers like Azure expect that * the first query be minimal size (and just used to get the number/size * of previous versions) so response size must be specified as EXACTLY * sizeof(struct snapshot_array) which is 16 when rounded up to multiple * of eight bytes. */ if (ret_data_len == 0) max_response_size = MIN_SNAPSHOT_ARRAY_SIZE; else max_response_size = CIFSMaxBufSize; rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SRV_ENUMERATE_SNAPSHOTS, NULL, 0 /* no input data */, max_response_size, (char **)&retbuf, &ret_data_len); cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n", rc, ret_data_len); if (rc) return rc; if (ret_data_len && (ioc_buf != NULL) && (retbuf != NULL)) { /* Fixup buffer */ if (copy_from_user(&snapshot_in, ioc_buf, sizeof(struct smb_snapshot_array))) { rc = -EFAULT; kfree(retbuf); return rc; } /* * Check for min size, ie not large enough to fit even one GMT * token (snapshot). On the first ioctl some users may pass in * smaller size (or zero) to simply get the size of the array * so the user space caller can allocate sufficient memory * and retry the ioctl again with larger array size sufficient * to hold all of the snapshot GMT tokens on the second try. */ if (snapshot_in.snapshot_array_size < GMT_TOKEN_SIZE) ret_data_len = sizeof(struct smb_snapshot_array); /* * We return struct SRV_SNAPSHOT_ARRAY, followed by * the snapshot array (of 50 byte GMT tokens) each * representing an available previous version of the data */ if (ret_data_len > (snapshot_in.snapshot_array_size + sizeof(struct smb_snapshot_array))) ret_data_len = snapshot_in.snapshot_array_size + sizeof(struct smb_snapshot_array); if (copy_to_user(ioc_buf, retbuf, ret_data_len)) rc = -EFAULT; } kfree(retbuf); return rc; } static int smb3_notify(const unsigned int xid, struct file *pfile, void __user *ioc_buf, bool return_changes) { struct smb3_notify_info notify; struct smb3_notify_info __user *pnotify_buf; struct dentry *dentry = pfile->f_path.dentry; struct inode *inode = file_inode(pfile); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_open_parms oparms; struct cifs_fid fid; struct cifs_tcon *tcon; const unsigned char *path; char *returned_ioctl_info = NULL; void *page = alloc_dentry_path(); __le16 *utf16_path = NULL; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; int rc = 0; __u32 ret_len = 0; path = build_path_from_dentry(dentry, page); if (IS_ERR(path)) { rc = PTR_ERR(path); goto notify_exit; } utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (utf16_path == NULL) { rc = -ENOMEM; goto notify_exit; } if (return_changes) { if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify_info))) { rc = -EFAULT; goto notify_exit; } } else { if (copy_from_user(¬ify, ioc_buf, sizeof(struct smb3_notify))) { rc = -EFAULT; goto notify_exit; } notify.data_len = 0; } tcon = cifs_sb_master_tcon(cifs_sb); oparms = (struct cifs_open_parms) { .tcon = tcon, .path = path, .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, }; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, NULL); if (rc) goto notify_exit; rc = SMB2_change_notify(xid, tcon, fid.persistent_fid, fid.volatile_fid, notify.watch_tree, notify.completion_filter, notify.data_len, &returned_ioctl_info, &ret_len); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); cifs_dbg(FYI, "change notify for path %s rc %d\n", path, rc); if (return_changes && (ret_len > 0) && (notify.data_len > 0)) { if (ret_len > notify.data_len) ret_len = notify.data_len; pnotify_buf = (struct smb3_notify_info __user *)ioc_buf; if (copy_to_user(pnotify_buf->notify_data, returned_ioctl_info, ret_len)) rc = -EFAULT; else if (copy_to_user(&pnotify_buf->data_len, &ret_len, sizeof(ret_len))) rc = -EFAULT; } kfree(returned_ioctl_info); notify_exit: free_dentry_path(page); kfree(utf16_path); return rc; } static int smb2_query_dir_first(const unsigned int xid, struct cifs_tcon *tcon, const char *path, struct cifs_sb_info *cifs_sb, struct cifs_fid *fid, __u16 search_flags, struct cifs_search_info *srch_inf) { __le16 *utf16_path; struct smb_rqst rqst[2]; struct kvec rsp_iov[2]; int resp_buftype[2]; struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; struct kvec qd_iov[SMB2_QUERY_DIRECTORY_IOV_SIZE]; int rc, flags = 0; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct smb2_query_directory_rsp *qd_rsp = NULL; struct smb2_create_rsp *op_rsp = NULL; struct TCP_Server_Info *server; int retries = 0, cur_sleep = 1; replay_again: /* reinitialize for possible replay */ flags = 0; oplock = SMB2_OPLOCK_LEVEL_NONE; server = cifs_pick_channel(tcon->ses); utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; memset(rqst, 0, sizeof(rqst)); resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER; memset(rsp_iov, 0, sizeof(rsp_iov)); /* Open */ memset(&open_iov, 0, sizeof(open_iov)); rqst[0].rq_iov = open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = path, .desired_access = FILE_READ_ATTRIBUTES | FILE_READ_DATA, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = fid, .replay = !!(retries), }; rc = SMB2_open_init(tcon, server, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto qdf_free; smb2_set_next_command(tcon, &rqst[0]); /* Query directory */ srch_inf->entries_in_buffer = 0; srch_inf->index_of_last_entry = 2; memset(&qd_iov, 0, sizeof(qd_iov)); rqst[1].rq_iov = qd_iov; rqst[1].rq_nvec = SMB2_QUERY_DIRECTORY_IOV_SIZE; rc = SMB2_query_directory_init(xid, tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, 0, srch_inf->info_level); if (rc) goto qdf_free; smb2_set_related(&rqst[1]); if (retries) { smb2_set_replay(server, &rqst[0]); smb2_set_replay(server, &rqst[1]); } rc = compound_send_recv(xid, tcon->ses, server, flags, 2, rqst, resp_buftype, rsp_iov); /* If the open failed there is nothing to do */ op_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base; if (op_rsp == NULL || op_rsp->hdr.Status != STATUS_SUCCESS) { cifs_dbg(FYI, "query_dir_first: open failed rc=%d\n", rc); goto qdf_free; } fid->persistent_fid = op_rsp->PersistentFileId; fid->volatile_fid = op_rsp->VolatileFileId; /* Anything else than ENODATA means a genuine error */ if (rc && rc != -ENODATA) { SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); cifs_dbg(FYI, "query_dir_first: query directory failed rc=%d\n", rc); trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, tcon->ses->Suid, 0, 0, rc); goto qdf_free; } atomic_inc(&tcon->num_remote_opens); qd_rsp = (struct smb2_query_directory_rsp *)rsp_iov[1].iov_base; if (qd_rsp->hdr.Status == STATUS_NO_MORE_FILES) { trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, tcon->ses->Suid, 0, 0); srch_inf->endOfSearch = true; rc = 0; goto qdf_free; } rc = smb2_parse_query_directory(tcon, &rsp_iov[1], resp_buftype[1], srch_inf); if (rc) { trace_smb3_query_dir_err(xid, fid->persistent_fid, tcon->tid, tcon->ses->Suid, 0, 0, rc); goto qdf_free; } resp_buftype[1] = CIFS_NO_BUFFER; trace_smb3_query_dir_done(xid, fid->persistent_fid, tcon->tid, tcon->ses->Suid, 0, srch_inf->entries_in_buffer); qdf_free: kfree(utf16_path); SMB2_open_free(&rqst[0]); SMB2_query_directory_free(&rqst[1]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); if (is_replayable_error(rc) && smb2_should_replay(tcon, &retries, &cur_sleep)) goto replay_again; return rc; } static int smb2_query_dir_next(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid, __u16 search_flags, struct cifs_search_info *srch_inf) { return SMB2_query_directory(xid, tcon, fid->persistent_fid, fid->volatile_fid, 0, srch_inf); } static int smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *fid) { return SMB2_close(xid, tcon, fid->persistent_fid, fid->volatile_fid); } /* * If we negotiate SMB2 protocol and get STATUS_PENDING - update * the number of credits and return true. Otherwise - return false. */ static bool smb2_is_status_pending(char *buf, struct TCP_Server_Info *server) { struct smb2_hdr *shdr = (struct smb2_hdr *)buf; int scredits, in_flight; if (shdr->Status != STATUS_PENDING) return false; if (shdr->CreditRequest) { spin_lock(&server->req_lock); server->credits += le16_to_cpu(shdr->CreditRequest); scredits = server->credits; in_flight = server->in_flight; spin_unlock(&server->req_lock); wake_up(&server->request_q); trace_smb3_pend_credits(server->CurrentMid, server->conn_id, server->hostname, scredits, le16_to_cpu(shdr->CreditRequest), in_flight); cifs_dbg(FYI, "%s: status pending add %u credits total=%d\n", __func__, le16_to_cpu(shdr->CreditRequest), scredits); } return true; } static bool smb2_is_session_expired(char *buf) { struct smb2_hdr *shdr = (struct smb2_hdr *)buf; if (shdr->Status != STATUS_NETWORK_SESSION_EXPIRED && shdr->Status != STATUS_USER_SESSION_DELETED) return false; trace_smb3_ses_expired(le32_to_cpu(shdr->Id.SyncId.TreeId), le64_to_cpu(shdr->SessionId), le16_to_cpu(shdr->Command), le64_to_cpu(shdr->MessageId)); cifs_dbg(FYI, "Session expired or deleted\n"); return true; } static bool smb2_is_status_io_timeout(char *buf) { struct smb2_hdr *shdr = (struct smb2_hdr *)buf; if (shdr->Status == STATUS_IO_TIMEOUT) return true; else return false; } static bool smb2_is_network_name_deleted(char *buf, struct TCP_Server_Info *server) { struct smb2_hdr *shdr = (struct smb2_hdr *)buf; struct TCP_Server_Info *pserver; struct cifs_ses *ses; struct cifs_tcon *tcon; if (shdr->Status != STATUS_NETWORK_NAME_DELETED) return false; /* If server is a channel, select the primary channel */ pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { if (cifs_ses_exiting(ses)) continue; list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { if (tcon->tid == le32_to_cpu(shdr->Id.SyncId.TreeId)) { spin_lock(&tcon->tc_lock); tcon->need_reconnect = true; spin_unlock(&tcon->tc_lock); spin_unlock(&cifs_tcp_ses_lock); pr_warn_once("Server share %s deleted.\n", tcon->tree_name); return true; } } } spin_unlock(&cifs_tcp_ses_lock); return false; } static int smb2_oplock_response(struct cifs_tcon *tcon, __u64 persistent_fid, __u64 volatile_fid, __u16 net_fid, struct cifsInodeInfo *cinode) { if (tcon->ses->server->capabilities & SMB2_GLOBAL_CAP_LEASING) return SMB2_lease_break(0, tcon, cinode->lease_key, smb2_get_lease_state(cinode)); return SMB2_oplock_break(0, tcon, persistent_fid, volatile_fid, CIFS_CACHE_READ(cinode) ? 1 : 0); } void smb2_set_replay(struct TCP_Server_Info *server, struct smb_rqst *rqst) { struct smb2_hdr *shdr; if (server->dialect < SMB30_PROT_ID) return; shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); if (shdr == NULL) { cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); return; } shdr->Flags |= SMB2_FLAGS_REPLAY_OPERATION; } void smb2_set_related(struct smb_rqst *rqst) { struct smb2_hdr *shdr; shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); if (shdr == NULL) { cifs_dbg(FYI, "shdr NULL in smb2_set_related\n"); return; } shdr->Flags |= SMB2_FLAGS_RELATED_OPERATIONS; } char smb2_padding[7] = {0, 0, 0, 0, 0, 0, 0}; void smb2_set_next_command(struct cifs_tcon *tcon, struct smb_rqst *rqst) { struct smb2_hdr *shdr; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server = ses->server; unsigned long len = smb_rqst_len(server, rqst); int i, num_padding; shdr = (struct smb2_hdr *)(rqst->rq_iov[0].iov_base); if (shdr == NULL) { cifs_dbg(FYI, "shdr NULL in smb2_set_next_command\n"); return; } /* SMB headers in a compound are 8 byte aligned. */ /* No padding needed */ if (!(len & 7)) goto finished; num_padding = 8 - (len & 7); if (!smb3_encryption_required(tcon)) { /* * If we do not have encryption then we can just add an extra * iov for the padding. */ rqst->rq_iov[rqst->rq_nvec].iov_base = smb2_padding; rqst->rq_iov[rqst->rq_nvec].iov_len = num_padding; rqst->rq_nvec++; len += num_padding; } else { /* * We can not add a small padding iov for the encryption case * because the encryption framework can not handle the padding * iovs. * We have to flatten this into a single buffer and add * the padding to it. */ for (i = 1; i < rqst->rq_nvec; i++) { memcpy(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, rqst->rq_iov[i].iov_base, rqst->rq_iov[i].iov_len); rqst->rq_iov[0].iov_len += rqst->rq_iov[i].iov_len; } memset(rqst->rq_iov[0].iov_base + rqst->rq_iov[0].iov_len, 0, num_padding); rqst->rq_iov[0].iov_len += num_padding; len += num_padding; rqst->rq_nvec = 1; } finished: shdr->NextCommand = cpu_to_le32(len); } /* * helper function for exponential backoff and check if replayable */ bool smb2_should_replay(struct cifs_tcon *tcon, int *pretries, int *pcur_sleep) { if (!pretries || !pcur_sleep) return false; if (tcon->retry || (*pretries)++ < tcon->ses->server->retrans) { msleep(*pcur_sleep); (*pcur_sleep) = ((*pcur_sleep) << 1); if ((*pcur_sleep) > CIFS_MAX_SLEEP) (*pcur_sleep) = CIFS_MAX_SLEEP; return true; } return false; } /* * Passes the query info response back to the caller on success. * Caller need to free this with free_rsp_buf(). */ int smb2_query_info_compound(const unsigned int xid, struct cifs_tcon *tcon, const char *path, u32 desired_access, u32 class, u32 type, u32 output_len, struct kvec *rsp, int *buftype, struct cifs_sb_info *cifs_sb) { struct smb2_compound_vars *vars; struct cifs_ses *ses = tcon->ses; struct TCP_Server_Info *server; int flags = CIFS_CP_CREATE_CLOSE_OP; struct smb_rqst *rqst; int resp_buftype[3]; struct kvec *rsp_iov; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; int rc; __le16 *utf16_path; struct cached_fid *cfid = NULL; int retries = 0, cur_sleep = 1; replay_again: /* reinitialize for possible replay */ flags = CIFS_CP_CREATE_CLOSE_OP; oplock = SMB2_OPLOCK_LEVEL_NONE; server = cifs_pick_channel(ses); if (!path) path = ""; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) return -ENOMEM; if (smb3_encryption_required(tcon)) flags |= CIFS_TRANSFORM_REQ; resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; vars = kzalloc(sizeof(*vars), GFP_KERNEL); if (!vars) { rc = -ENOMEM; goto out_free_path; } rqst = vars->rqst; rsp_iov = vars->rsp_iov; /* * We can only call this for things we know are directories. */ if (!strcmp(path, "")) open_cached_dir(xid, tcon, path, cifs_sb, false, &cfid); /* cfid null if open dir failed */ rqst[0].rq_iov = vars->open_iov; rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE; oparms = (struct cifs_open_parms) { .tcon = tcon, .path = path, .desired_access = desired_access, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, .replay = !!(retries), }; rc = SMB2_open_init(tcon, server, &rqst[0], &oplock, &oparms, utf16_path); if (rc) goto qic_exit; smb2_set_next_command(tcon, &rqst[0]); rqst[1].rq_iov = &vars->qi_iov; rqst[1].rq_nvec = 1; if (cfid) { rc = SMB2_query_info_init(tcon, server, &rqst[1], cfid->fid.persistent_fid, cfid->fid.volatile_fid, class, type, 0, output_len, 0, NULL); } else { rc = SMB2_query_info_init(tcon, server, &rqst[1], COMPOUND_FID, COMPOUND_FID, class, type, 0, output_len, 0, NULL); } if (rc) goto qic_exit; if (!cfid) { smb2_set_next_command(tcon, &rqst[1]); smb2_set_related(&rqst[1]); } rqst[2].rq_iov = &vars->close_iov; rqst[2].rq_nvec = 1; rc = SMB2_close_init(tcon, server, &rqst[2], COMPOUND_FID, COMPOUND_FID, false); if (rc) goto qic_exit; smb2_set_related(&rqst[2]); if (retries) { if (!cfid) { smb2_set_replay(server, &rqst[0]); smb2_set_replay(server, &rqst[2]); } smb2_set_replay(server, &rqst[1]); } if (cfid) { rc = compound_send_recv(xid, ses, server, flags, 1, &rqst[1], &resp_buftype[1], &rsp_iov[1]); } else { rc = compound_send_recv(xid, ses, server, flags, 3, rqst, resp_buftype, rsp_iov); } if (rc) { free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); if (rc == -EREMCHG) { tcon->need_reconnect = true; pr_warn_once("server share %s deleted\n", tcon->tree_name); } goto qic_exit; } *rsp = rsp_iov[1]; *buftype = resp_buftype[1]; qic_exit: SMB2_open_free(&rqst[0]); SMB2_query_info_free(&rqst[1]); SMB2_close_free(&rqst[2]); free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); if (cfid) close_cached_dir(cfid); kfree(vars); out_free_path: kfree(utf16_path); if (is_replayable_error(rc) && smb2_should_replay(tcon, &retries, &cur_sleep)) goto replay_again; return rc; } static int smb2_queryfs(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) { struct smb2_query_info_rsp *rsp; struct smb2_fs_full_size_info *info = NULL; struct kvec rsp_iov = {NULL, 0}; int buftype = CIFS_NO_BUFFER; int rc; rc = smb2_query_info_compound(xid, tcon, "", FILE_READ_ATTRIBUTES, FS_FULL_SIZE_INFORMATION, SMB2_O_INFO_FILESYSTEM, sizeof(struct smb2_fs_full_size_info), &rsp_iov, &buftype, cifs_sb); if (rc) goto qfs_exit; rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base; buf->f_type = SMB2_SUPER_MAGIC; info = (struct smb2_fs_full_size_info *)( le16_to_cpu(rsp->OutputBufferOffset) + (char *)rsp); rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset), le32_to_cpu(rsp->OutputBufferLength), &rsp_iov, sizeof(struct smb2_fs_full_size_info)); if (!rc) smb2_copy_fs_info_to_kstatfs(info, buf); qfs_exit: trace_smb3_qfs_done(xid, tcon->tid, tcon->ses->Suid, tcon->tree_name, rc); free_rsp_buf(buftype, rsp_iov.iov_base); return rc; } static int smb311_queryfs(const unsigned int xid, struct cifs_tcon *tcon, struct cifs_sb_info *cifs_sb, struct kstatfs *buf) { int rc; __le16 srch_path = 0; /* Null - open root of share */ u8 oplock = SMB2_OPLOCK_LEVEL_NONE; struct cifs_open_parms oparms; struct cifs_fid fid; if (!tcon->posix_extensions) return smb2_queryfs(xid, tcon, cifs_sb, buf); oparms = (struct cifs_open_parms) { .tcon = tcon, .path = "", .desired_access = FILE_READ_ATTRIBUTES, .disposition = FILE_OPEN, .create_options = cifs_create_options(cifs_sb, 0), .fid = &fid, }; rc = SMB2_open(xid, &oparms, &srch_path, &oplock, NULL, NULL, NULL, NULL); if (rc) return rc; rc = SMB311_posix_qfs_info(xid, tcon, fid.persistent_fid, fid.volatile_fid, buf); buf->f_type = SMB2_SUPER_MAGIC; SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); return rc; } static bool smb2_compare_fids(struct cifsFileInfo *ob1, struct cifsFileInfo *ob2) { return ob1->fid.persistent_fid == ob2->fid.persistent_fid && ob1->fid.volatile_fid == ob2->fid.volatile_fid; } static int smb2_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset, __u64 length, __u32 type, int lock, int unlock, bool wait) { if (unlock && !lock) type = SMB2_LOCKFLAG_UNLOCK; return SMB2_lock(xid, tlink_tcon(cfile->tlink), cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, length, offset, type, wait); } static void smb2_get_lease_key(struct inode *inode, struct cifs_fid *fid) { memcpy(fid->lease_key, CIFS_I(inode)->lease_key, SMB2_LEASE_KEY_SIZE); } static void smb2_set_lease_key(struct inode *inode, struct cifs_fid *fid) { memcpy(CIFS_I(inode)->lease_key, fid->lease_key, SMB2_LEASE_KEY_SIZE); } static void smb2_new_lease_key(struct cifs_fid *fid) { generate_random_uuid(fid->lease_key); } static int smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, const char *search_name, struct dfs_info3_param **target_nodes, unsigned int *num_of_nodes, const struct nls_table *nls_codepage, int remap) { int rc; __le16 *utf16_path = NULL; int utf16_path_len = 0; struct cifs_tcon *tcon; struct fsctl_get_dfs_referral_req *dfs_req = NULL; struct get_dfs_referral_rsp *dfs_rsp = NULL; u32 dfs_req_size = 0, dfs_rsp_size = 0; int retry_count = 0; cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name); /* * Try to use the IPC tcon, otherwise just use any */ tcon = ses->tcon_ipc; if (tcon == NULL) { spin_lock(&cifs_tcp_ses_lock); tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon, tcon_list); if (tcon) { tcon->tc_count++; trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, netfs_trace_tcon_ref_get_dfs_refer); } spin_unlock(&cifs_tcp_ses_lock); } if (tcon == NULL) { cifs_dbg(VFS, "session %p has no tcon available for a dfs referral request\n", ses); rc = -ENOTCONN; goto out; } utf16_path = cifs_strndup_to_utf16(search_name, PATH_MAX, &utf16_path_len, nls_codepage, remap); if (!utf16_path) { rc = -ENOMEM; goto out; } dfs_req_size = sizeof(*dfs_req) + utf16_path_len; dfs_req = kzalloc(dfs_req_size, GFP_KERNEL); if (!dfs_req) { rc = -ENOMEM; goto out; } /* Highest DFS referral version understood */ dfs_req->MaxReferralLevel = DFS_VERSION; /* Path to resolve in an UTF-16 null-terminated string */ memcpy(dfs_req->RequestFileName, utf16_path, utf16_path_len); do { rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID, FSCTL_DFS_GET_REFERRALS, (char *)dfs_req, dfs_req_size, CIFSMaxBufSize, (char **)&dfs_rsp, &dfs_rsp_size); if (!is_retryable_error(rc)) break; usleep_range(512, 2048); } while (++retry_count < 5); if (!rc && !dfs_rsp) rc = -EIO; if (rc) { if (!is_retryable_error(rc) && rc != -ENOENT && rc != -EOPNOTSUPP) cifs_tcon_dbg(VFS, "%s: ioctl error: rc=%d\n", __func__, rc); goto out; } rc = parse_dfs_referrals(dfs_rsp, dfs_rsp_size, num_of_nodes, target_nodes, nls_codepage, remap, search_name, true /* is_unicode */); if (rc) { cifs_tcon_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc); goto out; } out: if (tcon && !tcon->ipc) { /* ipc tcons are not refcounted */ spin_lock(&cifs_tcp_ses_lock); tcon->tc_count--; trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, netfs_trace_tcon_ref_dec_dfs_refer); /* tc_count can never go negative */ WARN_ON(tcon->tc_count < 0); spin_unlock(&cifs_tcp_ses_lock); } kfree(utf16_path); kfree(dfs_req); kfree(dfs_rsp); return rc; } static struct cifs_ntsd * get_smb2_acl_by_fid(struct cifs_sb_info *cifs_sb, const struct cifs_fid *cifsfid, u32 *pacllen, u32 info) { struct cifs_ntsd *pntsd = NULL; unsigned int xid; int rc = -EOPNOTSUPP; struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) return ERR_CAST(tlink); xid = get_xid(); cifs_dbg(FYI, "trying to get acl\n"); rc = SMB2_query_acl(xid, tlink_tcon(tlink), cifsfid->persistent_fid, cifsfid->volatile_fid, (void **)&pntsd, pacllen, info); free_xid(xid); cifs_put_tlink(tlink); cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); if (rc) return ERR_PTR(rc); return pntsd; } static struct cifs_ntsd * get_smb2_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path, u32 *pacllen, u32 info) { struct cifs_ntsd *pntsd = NULL; u8 oplock = SMB2_OPLOCK_LEVEL_NONE; unsigned int xid; int rc; struct cifs_tcon *tcon; struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct cifs_fid fid; struct cifs_open_parms oparms; __le16 *utf16_path; cifs_dbg(FYI, "get smb3 acl for path %s\n", path); if (IS_ERR(tlink)) return ERR_CAST(tlink); tcon = tlink_tcon(tlink); xid = get_xid(); utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; free_xid(xid); return ERR_PTR(rc); } oparms = (struct cifs_open_parms) { .tcon = tcon, .path = path, .desired_access = READ_CONTROL, .disposition = FILE_OPEN, /* * When querying an ACL, even if the file is a symlink * we want to open the source not the target, and so * the protocol requires that the client specify this * flag when opening a reparse point */ .create_options = cifs_create_options(cifs_sb, 0) | OPEN_REPARSE_POINT, .fid = &fid, }; if (info & SACL_SECINFO) oparms.desired_access |= SYSTEM_SECURITY; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, NULL); kfree(utf16_path); if (!rc) { rc = SMB2_query_acl(xid, tlink_tcon(tlink), fid.persistent_fid, fid.volatile_fid, (void **)&pntsd, pacllen, info); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } cifs_put_tlink(tlink); free_xid(xid); cifs_dbg(FYI, "%s: rc = %d ACL len %d\n", __func__, rc, *pacllen); if (rc) return ERR_PTR(rc); return pntsd; } static int set_smb2_acl(struct cifs_ntsd *pnntsd, __u32 acllen, struct inode *inode, const char *path, int aclflag) { u8 oplock = SMB2_OPLOCK_LEVEL_NONE; unsigned int xid; int rc, access_flags = 0; struct cifs_tcon *tcon; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); struct cifs_fid fid; struct cifs_open_parms oparms; __le16 *utf16_path; cifs_dbg(FYI, "set smb3 acl for path %s\n", path); if (IS_ERR(tlink)) return PTR_ERR(tlink); tcon = tlink_tcon(tlink); xid = get_xid(); if (aclflag & CIFS_ACL_OWNER || aclflag & CIFS_ACL_GROUP) access_flags |= WRITE_OWNER; if (aclflag & CIFS_ACL_SACL) access_flags |= SYSTEM_SECURITY; if (aclflag & CIFS_ACL_DACL) access_flags |= WRITE_DAC; utf16_path = cifs_convert_path_to_utf16(path, cifs_sb); if (!utf16_path) { rc = -ENOMEM; free_xid(xid); return rc; } oparms = (struct cifs_open_parms) { .tcon = tcon, .desired_access = access_flags, .create_options = cifs_create_options(cifs_sb, 0), .disposition = FILE_OPEN, .path = path, .fid = &fid, }; rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, NULL, NULL, NULL); kfree(utf16_path); if (!rc) { rc = SMB2_set_acl(xid, tlink_tcon(tlink), fid.persistent_fid, fid.volatile_fid, pnntsd, acllen, aclflag); SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid); } cifs_put_tlink(tlink); free_xid(xid); return rc; } /* Retrieve an ACL from the server */ static struct cifs_ntsd * get_smb2_acl(struct cifs_sb_info *cifs_sb, struct inode *inode, const char *path, u32 *pacllen, u32 info) { struct cifs_ntsd *pntsd = NULL; struct cifsFileInfo *open_file = NULL; if (inode && !(info & SACL_SECINFO)) open_file = find_readable_file(CIFS_I(inode), true); if (!open_file || (info & SACL_SECINFO)) return get_smb2_acl_by_path(cifs_sb, path, pacllen, info); pntsd = get_smb2_acl_by_fid(cifs_sb, &open_file->fid, pacllen, info); cifsFileInfo_put(open_file); return pntsd; } static long smb3_zero_data(struct file *file, struct cifs_tcon *tcon, loff_t offset, loff_t len, unsigned int xid) { struct cifsFileInfo *cfile = file->private_data; struct file_zero_data_information fsctl_buf; cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); fsctl_buf.FileOffset = cpu_to_le64(offset); fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); return SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, (char *)&fsctl_buf, sizeof(struct file_zero_data_information), 0, NULL, NULL); } static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon, unsigned long long offset, unsigned long long len, bool keep_size) { struct cifs_ses *ses = tcon->ses; struct inode *inode = file_inode(file); struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifsFileInfo *cfile = file->private_data; struct netfs_inode *ictx = netfs_inode(inode); unsigned long long i_size, new_size, remote_size; long rc; unsigned int xid; xid = get_xid(); trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len); inode_lock(inode); filemap_invalidate_lock(inode->i_mapping); i_size = i_size_read(inode); remote_size = ictx->remote_i_size; if (offset + len >= remote_size && offset < i_size) { unsigned long long top = umin(offset + len, i_size); rc = filemap_write_and_wait_range(inode->i_mapping, offset, top - 1); if (rc < 0) goto zero_range_exit; } /* * We zero the range through ioctl, so we need remove the page caches * first, otherwise the data may be inconsistent with the server. */ truncate_pagecache_range(inode, offset, offset + len - 1); /* if file not oplocked can't be sure whether asking to extend size */ rc = -EOPNOTSUPP; if (keep_size == false && !CIFS_CACHE_READ(cifsi)) goto zero_range_exit; rc = smb3_zero_data(file, tcon, offset, len, xid); if (rc < 0) goto zero_range_exit; /* * do we also need to change the size of the file? */ new_size = offset + len; if (keep_size == false && (unsigned long long)i_size_read(inode) < new_size) { rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, new_size); if (rc >= 0) { truncate_setsize(inode, new_size); netfs_resize_file(&cifsi->netfs, new_size, true); if (offset < cifsi->netfs.zero_point) cifsi->netfs.zero_point = offset; fscache_resize_cookie(cifs_inode_cookie(inode), new_size); } } zero_range_exit: filemap_invalidate_unlock(inode->i_mapping); inode_unlock(inode); free_xid(xid); if (rc) trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len, rc); else trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid, ses->Suid, offset, len); return rc; } static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon, loff_t offset, loff_t len) { struct inode *inode = file_inode(file); struct cifsFileInfo *cfile = file->private_data; struct file_zero_data_information fsctl_buf; unsigned long long end = offset + len, i_size, remote_i_size; long rc; unsigned int xid; __u8 set_sparse = 1; xid = get_xid(); inode_lock(inode); /* Need to make file sparse, if not already, before freeing range. */ /* Consider adding equivalent for compressed since it could also work */ if (!smb2_set_sparse(xid, tcon, cfile, inode, set_sparse)) { rc = -EOPNOTSUPP; goto out; } filemap_invalidate_lock(inode->i_mapping); /* * We implement the punch hole through ioctl, so we need remove the page * caches first, otherwise the data may be inconsistent with the server. */ truncate_pagecache_range(inode, offset, offset + len - 1); cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len); fsctl_buf.FileOffset = cpu_to_le64(offset); fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, (char *)&fsctl_buf, sizeof(struct file_zero_data_information), CIFSMaxBufSize, NULL, NULL); if (rc) goto unlock; /* If there's dirty data in the buffer that would extend the EOF if it * were written, then we need to move the EOF marker over to the lower * of the high end of the hole and the proposed EOF. The problem is * that we locally hole-punch the tail of the dirty data, the proposed * EOF update will end up in the wrong place. */ i_size = i_size_read(inode); remote_i_size = netfs_inode(inode)->remote_i_size; if (end > remote_i_size && i_size > remote_i_size) { unsigned long long extend_to = umin(end, i_size); rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, extend_to); if (rc >= 0) netfs_inode(inode)->remote_i_size = extend_to; } unlock: filemap_invalidate_unlock(inode->i_mapping); out: inode_unlock(inode); free_xid(xid); return rc; } static int smb3_simple_fallocate_write_range(unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, loff_t off, loff_t len, char *buf) { struct cifs_io_parms io_parms = {0}; int nbytes; int rc = 0; struct kvec iov[2]; io_parms.netfid = cfile->fid.netfid; io_parms.pid = current->tgid; io_parms.tcon = tcon; io_parms.persistent_fid = cfile->fid.persistent_fid; io_parms.volatile_fid = cfile->fid.volatile_fid; while (len) { io_parms.offset = off; io_parms.length = len; if (io_parms.length > SMB2_MAX_BUFFER_SIZE) io_parms.length = SMB2_MAX_BUFFER_SIZE; /* iov[0] is reserved for smb header */ iov[1].iov_base = buf; iov[1].iov_len = io_parms.length; rc = SMB2_write(xid, &io_parms, &nbytes, iov, 1); if (rc) break; if (nbytes > len) return -EINVAL; buf += nbytes; off += nbytes; len -= nbytes; } return rc; } static int smb3_simple_fallocate_range(unsigned int xid, struct cifs_tcon *tcon, struct cifsFileInfo *cfile, loff_t off, loff_t len) { struct file_allocated_range_buffer in_data, *out_data = NULL, *tmp_data; u32 out_data_len; char *buf = NULL; loff_t l; int rc; in_data.file_offset = cpu_to_le64(off); in_data.length = cpu_to_le64(len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_QUERY_ALLOCATED_RANGES, (char *)&in_data, sizeof(in_data), 1024 * sizeof(struct file_allocated_range_buffer), (char **)&out_data, &out_data_len); if (rc) goto out; buf = kzalloc(1024 * 1024, GFP_KERNEL); if (buf == NULL) { rc = -ENOMEM; goto out; } tmp_data = out_data; while (len) { /* * The rest of the region is unmapped so write it all. */ if (out_data_len == 0) { rc = smb3_simple_fallocate_write_range(xid, tcon, cfile, off, len, buf); goto out; } if (out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } if (off < le64_to_cpu(tmp_data->file_offset)) { /* * We are at a hole. Write until the end of the region * or until the next allocated data, * whichever comes next. */ l = le64_to_cpu(tmp_data->file_offset) - off; if (len < l) l = len; rc = smb3_simple_fallocate_write_range(xid, tcon, cfile, off, l, buf); if (rc) goto out; off = off + l; len = len - l; if (len == 0) goto out; } /* * We are at a section of allocated data, just skip forward * until the end of the data or the end of the region * we are supposed to fallocate, whichever comes first. */ l = le64_to_cpu(tmp_data->length); if (len < l) l = len; off += l; len -= l; tmp_data = &tmp_data[1]; out_data_len -= sizeof(struct file_allocated_range_buffer); } out: kfree(out_data); kfree(buf); return rc; } static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon, loff_t off, loff_t len, bool keep_size) { struct inode *inode; struct cifsInodeInfo *cifsi; struct cifsFileInfo *cfile = file->private_data; long rc = -EOPNOTSUPP; unsigned int xid; loff_t new_eof; xid = get_xid(); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len); /* if file not oplocked can't be sure whether asking to extend size */ if (!CIFS_CACHE_READ(cifsi)) if (keep_size == false) { trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); free_xid(xid); return rc; } /* * Extending the file */ if ((keep_size == false) && i_size_read(inode) < off + len) { rc = inode_newsize_ok(inode, off + len); if (rc) goto out; if (cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) smb2_set_sparse(xid, tcon, cfile, inode, false); new_eof = off + len; rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, new_eof); if (rc == 0) { netfs_resize_file(&cifsi->netfs, new_eof, true); cifs_setsize(inode, new_eof); cifs_truncate_page(inode->i_mapping, inode->i_size); truncate_setsize(inode, new_eof); } goto out; } /* * Files are non-sparse by default so falloc may be a no-op * Must check if file sparse. If not sparse, and since we are not * extending then no need to do anything since file already allocated */ if ((cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE) == 0) { rc = 0; goto out; } if (keep_size == true) { /* * We can not preallocate pages beyond the end of the file * in SMB2 */ if (off >= i_size_read(inode)) { rc = 0; goto out; } /* * For fallocates that are partially beyond the end of file, * clamp len so we only fallocate up to the end of file. */ if (off + len > i_size_read(inode)) { len = i_size_read(inode) - off; } } if ((keep_size == true) || (i_size_read(inode) >= off + len)) { /* * At this point, we are trying to fallocate an internal * regions of a sparse file. Since smb2 does not have a * fallocate command we have two otions on how to emulate this. * We can either turn the entire file to become non-sparse * which we only do if the fallocate is for virtually * the whole file, or we can overwrite the region with zeroes * using SMB2_write, which could be prohibitevly expensive * if len is large. */ /* * We are only trying to fallocate a small region so * just write it with zero. */ if (len <= 1024 * 1024) { rc = smb3_simple_fallocate_range(xid, tcon, cfile, off, len); goto out; } /* * Check if falloc starts within first few pages of file * and ends within a few pages of the end of file to * ensure that most of file is being forced to be * fallocated now. If so then setting whole file sparse * ie potentially making a few extra pages at the beginning * or end of the file non-sparse via set_sparse is harmless. */ if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) { rc = -EOPNOTSUPP; goto out; } } smb2_set_sparse(xid, tcon, cfile, inode, false); rc = 0; out: if (rc) trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len, rc); else trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid, tcon->ses->Suid, off, len); free_xid(xid); return rc; } static long smb3_collapse_range(struct file *file, struct cifs_tcon *tcon, loff_t off, loff_t len) { int rc; unsigned int xid; struct inode *inode = file_inode(file); struct cifsInodeInfo *cifsi = CIFS_I(inode); struct cifsFileInfo *cfile = file->private_data; struct netfs_inode *ictx = &cifsi->netfs; loff_t old_eof, new_eof; xid = get_xid(); inode_lock(inode); old_eof = i_size_read(inode); if ((off >= old_eof) || off + len >= old_eof) { rc = -EINVAL; goto out; } filemap_invalidate_lock(inode->i_mapping); rc = filemap_write_and_wait_range(inode->i_mapping, off, old_eof - 1); if (rc < 0) goto out_2; truncate_pagecache_range(inode, off, old_eof); ictx->zero_point = old_eof; rc = smb2_copychunk_range(xid, cfile, cfile, off + len, old_eof - off - len, off); if (rc < 0) goto out_2; new_eof = old_eof - len; rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, new_eof); if (rc < 0) goto out_2; rc = 0; truncate_setsize(inode, new_eof); netfs_resize_file(&cifsi->netfs, new_eof, true); ictx->zero_point = new_eof; fscache_resize_cookie(cifs_inode_cookie(inode), new_eof); out_2: filemap_invalidate_unlock(inode->i_mapping); out: inode_unlock(inode); free_xid(xid); return rc; } static long smb3_insert_range(struct file *file, struct cifs_tcon *tcon, loff_t off, loff_t len) { int rc; unsigned int xid; struct cifsFileInfo *cfile = file->private_data; struct inode *inode = file_inode(file); struct cifsInodeInfo *cifsi = CIFS_I(inode); __u64 count, old_eof, new_eof; xid = get_xid(); inode_lock(inode); old_eof = i_size_read(inode); if (off >= old_eof) { rc = -EINVAL; goto out; } count = old_eof - off; new_eof = old_eof + len; filemap_invalidate_lock(inode->i_mapping); rc = filemap_write_and_wait_range(inode->i_mapping, off, new_eof - 1); if (rc < 0) goto out_2; truncate_pagecache_range(inode, off, old_eof); rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, cfile->pid, new_eof); if (rc < 0) goto out_2; truncate_setsize(inode, new_eof); netfs_resize_file(&cifsi->netfs, i_size_read(inode), true); fscache_resize_cookie(cifs_inode_cookie(inode), i_size_read(inode)); rc = smb2_copychunk_range(xid, cfile, cfile, off, count, off + len); if (rc < 0) goto out_2; cifsi->netfs.zero_point = new_eof; rc = smb3_zero_data(file, tcon, off, len, xid); if (rc < 0) goto out_2; rc = 0; out_2: filemap_invalidate_unlock(inode->i_mapping); out: inode_unlock(inode); free_xid(xid); return rc; } static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence) { struct cifsFileInfo *wrcfile, *cfile = file->private_data; struct cifsInodeInfo *cifsi; struct inode *inode; int rc = 0; struct file_allocated_range_buffer in_data, *out_data = NULL; u32 out_data_len; unsigned int xid; if (whence != SEEK_HOLE && whence != SEEK_DATA) return generic_file_llseek(file, offset, whence); inode = d_inode(cfile->dentry); cifsi = CIFS_I(inode); if (offset < 0 || offset >= i_size_read(inode)) return -ENXIO; xid = get_xid(); /* * We need to be sure that all dirty pages are written as they * might fill holes on the server. * Note that we also MUST flush any written pages since at least * some servers (Windows2016) will not reflect recent writes in * QUERY_ALLOCATED_RANGES until SMB2_flush is called. */ wrcfile = find_writable_file(cifsi, FIND_WR_ANY); if (wrcfile) { filemap_write_and_wait(inode->i_mapping); smb2_flush_file(xid, tcon, &wrcfile->fid); cifsFileInfo_put(wrcfile); } if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) { if (whence == SEEK_HOLE) offset = i_size_read(inode); goto lseek_exit; } in_data.file_offset = cpu_to_le64(offset); in_data.length = cpu_to_le64(i_size_read(inode)); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_QUERY_ALLOCATED_RANGES, (char *)&in_data, sizeof(in_data), sizeof(struct file_allocated_range_buffer), (char **)&out_data, &out_data_len); if (rc == -E2BIG) rc = 0; if (rc) goto lseek_exit; if (whence == SEEK_HOLE && out_data_len == 0) goto lseek_exit; if (whence == SEEK_DATA && out_data_len == 0) { rc = -ENXIO; goto lseek_exit; } if (out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto lseek_exit; } if (whence == SEEK_DATA) { offset = le64_to_cpu(out_data->file_offset); goto lseek_exit; } if (offset < le64_to_cpu(out_data->file_offset)) goto lseek_exit; offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length); lseek_exit: free_xid(xid); kfree(out_data); if (!rc) return vfs_setpos(file, offset, inode->i_sb->s_maxbytes); else return rc; } static int smb3_fiemap(struct cifs_tcon *tcon, struct cifsFileInfo *cfile, struct fiemap_extent_info *fei, u64 start, u64 len) { unsigned int xid; struct file_allocated_range_buffer in_data, *out_data; u32 out_data_len; int i, num, rc, flags, last_blob; u64 next; rc = fiemap_prep(d_inode(cfile->dentry), fei, start, &len, 0); if (rc) return rc; xid = get_xid(); again: in_data.file_offset = cpu_to_le64(start); in_data.length = cpu_to_le64(len); rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, FSCTL_QUERY_ALLOCATED_RANGES, (char *)&in_data, sizeof(in_data), 1024 * sizeof(struct file_allocated_range_buffer), (char **)&out_data, &out_data_len); if (rc == -E2BIG) { last_blob = 0; rc = 0; } else last_blob = 1; if (rc) goto out; if (out_data_len && out_data_len < sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } if (out_data_len % sizeof(struct file_allocated_range_buffer)) { rc = -EINVAL; goto out; } num = out_data_len / sizeof(struct file_allocated_range_buffer); for (i = 0; i < num; i++) { flags = 0; if (i == num - 1 && last_blob) flags |= FIEMAP_EXTENT_LAST; rc = fiemap_fill_next_extent(fei, le64_to_cpu(out_data[i].file_offset), le64_to_cpu(out_data[i].file_offset), le64_to_cpu(out_data[i].length), flags); if (rc < 0) goto out; if (rc == 1) { rc = 0; goto out; } } if (!last_blob) { next = le64_to_cpu(out_data[num - 1].file_offset) + le64_to_cpu(out_data[num - 1].length); len = len - (next - start); start = next; goto again; } out: free_xid(xid); kfree(out_data); return rc; } static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode, loff_t off, loff_t len) { /* KEEP_SIZE already checked for by do_fallocate */ if (mode & FALLOC_FL_PUNCH_HOLE) return smb3_punch_hole(file, tcon, off, len); else if (mode & FALLOC_FL_ZERO_RANGE) { if (mode & FALLOC_FL_KEEP_SIZE) return smb3_zero_range(file, tcon, off, len, true); return smb3_zero_range(file, tcon, off, len, false); } else if (mode == FALLOC_FL_KEEP_SIZE) return smb3_simple_falloc(file, tcon, off, len, true); else if (mode == FALLOC_FL_COLLAPSE_RANGE) return smb3_collapse_range(file, tcon, off, len); else if (mode == FALLOC_FL_INSERT_RANGE) return smb3_insert_range(file, tcon, off, len); else if (mode == 0) return smb3_simple_falloc(file, tcon, off, len, false); return -EOPNOTSUPP; } static void smb2_downgrade_oplock(struct TCP_Server_Info *server, struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { server->ops->set_oplock_level(cinode, oplock, 0, NULL); } static void smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache); static void smb3_downgrade_oplock(struct TCP_Server_Info *server, struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { unsigned int old_state = cinode->oplock; unsigned int old_epoch = cinode->epoch; unsigned int new_state; if (epoch > old_epoch) { smb21_set_oplock_level(cinode, oplock, 0, NULL); cinode->epoch = epoch; } new_state = cinode->oplock; *purge_cache = false; if ((old_state & CIFS_CACHE_READ_FLG) != 0 && (new_state & CIFS_CACHE_READ_FLG) == 0) *purge_cache = true; else if (old_state == new_state && (epoch - old_epoch > 1)) *purge_cache = true; } static void smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { oplock &= 0xFF; cinode->lease_granted = false; if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) return; if (oplock == SMB2_OPLOCK_LEVEL_BATCH) { cinode->oplock = CIFS_CACHE_RHW_FLG; cifs_dbg(FYI, "Batch Oplock granted on inode %p\n", &cinode->netfs.inode); } else if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) { cinode->oplock = CIFS_CACHE_RW_FLG; cifs_dbg(FYI, "Exclusive Oplock granted on inode %p\n", &cinode->netfs.inode); } else if (oplock == SMB2_OPLOCK_LEVEL_II) { cinode->oplock = CIFS_CACHE_READ_FLG; cifs_dbg(FYI, "Level II Oplock granted on inode %p\n", &cinode->netfs.inode); } else cinode->oplock = 0; } static void smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { char message[5] = {0}; unsigned int new_oplock = 0; oplock &= 0xFF; cinode->lease_granted = true; if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE) return; /* Check if the server granted an oplock rather than a lease */ if (oplock & SMB2_OPLOCK_LEVEL_EXCLUSIVE) return smb2_set_oplock_level(cinode, oplock, epoch, purge_cache); if (oplock & SMB2_LEASE_READ_CACHING_HE) { new_oplock |= CIFS_CACHE_READ_FLG; strcat(message, "R"); } if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) { new_oplock |= CIFS_CACHE_HANDLE_FLG; strcat(message, "H"); } if (oplock & SMB2_LEASE_WRITE_CACHING_HE) { new_oplock |= CIFS_CACHE_WRITE_FLG; strcat(message, "W"); } if (!new_oplock) strscpy(message, "None"); cinode->oplock = new_oplock; cifs_dbg(FYI, "%s Lease granted on inode %p\n", message, &cinode->netfs.inode); } static void smb3_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock, unsigned int epoch, bool *purge_cache) { unsigned int old_oplock = cinode->oplock; smb21_set_oplock_level(cinode, oplock, epoch, purge_cache); if (purge_cache) { *purge_cache = false; if (old_oplock == CIFS_CACHE_READ_FLG) { if (cinode->oplock == CIFS_CACHE_READ_FLG && (epoch - cinode->epoch > 0)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RH_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RHW_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; else if (cinode->oplock == 0 && (epoch - cinode->epoch > 0)) *purge_cache = true; } else if (old_oplock == CIFS_CACHE_RH_FLG) { if (cinode->oplock == CIFS_CACHE_RH_FLG && (epoch - cinode->epoch > 0)) *purge_cache = true; else if (cinode->oplock == CIFS_CACHE_RHW_FLG && (epoch - cinode->epoch > 1)) *purge_cache = true; } cinode->epoch = epoch; } } #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY static bool smb2_is_read_op(__u32 oplock) { return oplock == SMB2_OPLOCK_LEVEL_II; } #endif /* CIFS_ALLOW_INSECURE_LEGACY */ static bool smb21_is_read_op(__u32 oplock) { return (oplock & SMB2_LEASE_READ_CACHING_HE) && !(oplock & SMB2_LEASE_WRITE_CACHING_HE); } static __le32 map_oplock_to_lease(u8 oplock) { if (oplock == SMB2_OPLOCK_LEVEL_EXCLUSIVE) return SMB2_LEASE_WRITE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE; else if (oplock == SMB2_OPLOCK_LEVEL_II) return SMB2_LEASE_READ_CACHING_LE; else if (oplock == SMB2_OPLOCK_LEVEL_BATCH) return SMB2_LEASE_HANDLE_CACHING_LE | SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_WRITE_CACHING_LE; return 0; } static char * smb2_create_lease_buf(u8 *lease_key, u8 oplock) { struct create_lease *buf; buf = kzalloc(sizeof(struct create_lease), GFP_KERNEL); if (!buf) return NULL; memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); buf->lcontext.LeaseState = map_oplock_to_lease(oplock); buf->ccontext.DataOffset = cpu_to_le16(offsetof (struct create_lease, lcontext)); buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context)); buf->ccontext.NameOffset = cpu_to_le16(offsetof (struct create_lease, Name)); buf->ccontext.NameLength = cpu_to_le16(4); /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ buf->Name[0] = 'R'; buf->Name[1] = 'q'; buf->Name[2] = 'L'; buf->Name[3] = 's'; return (char *)buf; } static char * smb3_create_lease_buf(u8 *lease_key, u8 oplock) { struct create_lease_v2 *buf; buf = kzalloc(sizeof(struct create_lease_v2), GFP_KERNEL); if (!buf) return NULL; memcpy(&buf->lcontext.LeaseKey, lease_key, SMB2_LEASE_KEY_SIZE); buf->lcontext.LeaseState = map_oplock_to_lease(oplock); buf->ccontext.DataOffset = cpu_to_le16(offsetof (struct create_lease_v2, lcontext)); buf->ccontext.DataLength = cpu_to_le32(sizeof(struct lease_context_v2)); buf->ccontext.NameOffset = cpu_to_le16(offsetof (struct create_lease_v2, Name)); buf->ccontext.NameLength = cpu_to_le16(4); /* SMB2_CREATE_REQUEST_LEASE is "RqLs" */ buf->Name[0] = 'R'; buf->Name[1] = 'q'; buf->Name[2] = 'L'; buf->Name[3] = 's'; return (char *)buf; } static __u8 smb2_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) { struct create_lease *lc = (struct create_lease *)buf; *epoch = 0; /* not used */ if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) return SMB2_OPLOCK_LEVEL_NOCHANGE; return le32_to_cpu(lc->lcontext.LeaseState); } static __u8 smb3_parse_lease_buf(void *buf, unsigned int *epoch, char *lease_key) { struct create_lease_v2 *lc = (struct create_lease_v2 *)buf; *epoch = le16_to_cpu(lc->lcontext.Epoch); if (lc->lcontext.LeaseFlags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS_LE) return SMB2_OPLOCK_LEVEL_NOCHANGE; if (lease_key) memcpy(lease_key, &lc->lcontext.LeaseKey, SMB2_LEASE_KEY_SIZE); return le32_to_cpu(lc->lcontext.LeaseState); } static unsigned int smb2_wp_retry_size(struct inode *inode) { return min_t(unsigned int, CIFS_SB(inode->i_sb)->ctx->wsize, SMB2_MAX_BUFFER_SIZE); } static bool smb2_dir_needs_close(struct cifsFileInfo *cfile) { return !cfile->invalidHandle; } static void fill_transform_hdr(struct smb2_transform_hdr *tr_hdr, unsigned int orig_len, struct smb_rqst *old_rq, __le16 cipher_type) { struct smb2_hdr *shdr = (struct smb2_hdr *)old_rq->rq_iov[0].iov_base; memset(tr_hdr, 0, sizeof(struct smb2_transform_hdr)); tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM; tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len); tr_hdr->Flags = cpu_to_le16(0x01); 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, &shdr->SessionId, 8); } static void *smb2_aead_req_alloc(struct crypto_aead *tfm, const struct smb_rqst *rqst, int num_rqst, const u8 *sig, u8 **iv, struct aead_request **req, struct sg_table *sgt, unsigned int *num_sgs, size_t *sensitive_size) { unsigned int req_size = sizeof(**req) + crypto_aead_reqsize(tfm); unsigned int iv_size = crypto_aead_ivsize(tfm); unsigned int len; u8 *p; *num_sgs = cifs_get_num_sgs(rqst, num_rqst, sig); if (IS_ERR_VALUE((long)(int)*num_sgs)) return ERR_PTR(*num_sgs); len = iv_size; len += crypto_aead_alignmask(tfm) & ~(crypto_tfm_ctx_alignment() - 1); len = ALIGN(len, crypto_tfm_ctx_alignment()); len += req_size; len = ALIGN(len, __alignof__(struct scatterlist)); len += array_size(*num_sgs, sizeof(struct scatterlist)); *sensitive_size = len; p = kvzalloc(len, GFP_NOFS); if (!p) return ERR_PTR(-ENOMEM); *iv = (u8 *)PTR_ALIGN(p, crypto_aead_alignmask(tfm) + 1); *req = (struct aead_request *)PTR_ALIGN(*iv + iv_size, crypto_tfm_ctx_alignment()); sgt->sgl = (struct scatterlist *)PTR_ALIGN((u8 *)*req + req_size, __alignof__(struct scatterlist)); return p; } static void *smb2_get_aead_req(struct crypto_aead *tfm, struct smb_rqst *rqst, int num_rqst, const u8 *sig, u8 **iv, struct aead_request **req, struct scatterlist **sgl, size_t *sensitive_size) { struct sg_table sgtable = {}; unsigned int skip, num_sgs, i, j; ssize_t rc; void *p; p = smb2_aead_req_alloc(tfm, rqst, num_rqst, sig, iv, req, &sgtable, &num_sgs, sensitive_size); if (IS_ERR(p)) return ERR_CAST(p); sg_init_marker(sgtable.sgl, num_sgs); /* * The first rqst has a transform header where the * first 20 bytes are not part of the encrypted blob. */ skip = 20; for (i = 0; i < num_rqst; i++) { struct iov_iter *iter = &rqst[i].rq_iter; size_t count = iov_iter_count(iter); for (j = 0; j < rqst[i].rq_nvec; j++) { cifs_sg_set_buf(&sgtable, rqst[i].rq_iov[j].iov_base + skip, rqst[i].rq_iov[j].iov_len - skip); /* See the above comment on the 'skip' assignment */ skip = 0; } sgtable.orig_nents = sgtable.nents; rc = extract_iter_to_sg(iter, count, &sgtable, num_sgs - sgtable.nents, 0); iov_iter_revert(iter, rc); sgtable.orig_nents = sgtable.nents; } cifs_sg_set_buf(&sgtable, sig, SMB2_SIGNATURE_SIZE); sg_mark_end(&sgtable.sgl[sgtable.nents - 1]); *sgl = sgtable.sgl; return p; } static int smb2_get_enc_key(struct TCP_Server_Info *server, __u64 ses_id, int enc, u8 *key) { struct TCP_Server_Info *pserver; struct cifs_ses *ses; u8 *ses_enc_key; /* If server is a channel, select the primary channel */ pserver = SERVER_IS_CHAN(server) ? server->primary_server : server; spin_lock(&cifs_tcp_ses_lock); list_for_each_entry(ses, &pserver->smb_ses_list, smb_ses_list) { if (ses->Suid == ses_id) { spin_lock(&ses->ses_lock); ses_enc_key = enc ? ses->smb3encryptionkey : ses->smb3decryptionkey; memcpy(key, ses_enc_key, SMB3_ENC_DEC_KEY_SIZE); spin_unlock(&ses->ses_lock); spin_unlock(&cifs_tcp_ses_lock); return 0; } } spin_unlock(&cifs_tcp_ses_lock); trace_smb3_ses_not_found(ses_id); return -EAGAIN; } /* * Encrypt or decrypt @rqst message. @rqst[0] has the following format: * iov[0] - transform header (associate data), * iov[1-N] - SMB2 header and pages - data to encrypt. * On success return encrypted data in iov[1-N] and pages, leave iov[0] * untouched. */ static int crypt_message(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst, int enc) { struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)rqst[0].rq_iov[0].iov_base; unsigned int assoc_data_len = sizeof(struct smb2_transform_hdr) - 20; int rc = 0; struct scatterlist *sg; u8 sign[SMB2_SIGNATURE_SIZE] = {}; u8 key[SMB3_ENC_DEC_KEY_SIZE]; struct aead_request *req; u8 *iv; DECLARE_CRYPTO_WAIT(wait); struct crypto_aead *tfm; unsigned int crypt_len = le32_to_cpu(tr_hdr->OriginalMessageSize); void *creq; size_t sensitive_size; rc = smb2_get_enc_key(server, le64_to_cpu(tr_hdr->SessionId), enc, key); if (rc) { cifs_server_dbg(FYI, "%s: Could not get %scryption key. sid: 0x%llx\n", __func__, enc ? "en" : "de", le64_to_cpu(tr_hdr->SessionId)); return rc; } rc = smb3_crypto_aead_allocate(server); if (rc) { cifs_server_dbg(VFS, "%s: crypto alloc failed\n", __func__); return rc; } tfm = enc ? server->secmech.enc : server->secmech.dec; if ((server->cipher_type == SMB2_ENCRYPTION_AES256_CCM) || (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) rc = crypto_aead_setkey(tfm, key, SMB3_GCM256_CRYPTKEY_SIZE); else rc = crypto_aead_setkey(tfm, key, SMB3_GCM128_CRYPTKEY_SIZE); if (rc) { cifs_server_dbg(VFS, "%s: Failed to set aead key %d\n", __func__, rc); return rc; } rc = crypto_aead_setauthsize(tfm, SMB2_SIGNATURE_SIZE); if (rc) { cifs_server_dbg(VFS, "%s: Failed to set authsize %d\n", __func__, rc); return rc; } creq = smb2_get_aead_req(tfm, rqst, num_rqst, sign, &iv, &req, &sg, &sensitive_size); if (IS_ERR(creq)) return PTR_ERR(creq); if (!enc) { memcpy(sign, &tr_hdr->Signature, SMB2_SIGNATURE_SIZE); crypt_len += SMB2_SIGNATURE_SIZE; } if ((server->cipher_type == SMB2_ENCRYPTION_AES128_GCM) || (server->cipher_type == SMB2_ENCRYPTION_AES256_GCM)) memcpy(iv, (char *)tr_hdr->Nonce, SMB3_AES_GCM_NONCE); else { iv[0] = 3; memcpy(iv + 1, (char *)tr_hdr->Nonce, SMB3_AES_CCM_NONCE); } aead_request_set_tfm(req, tfm); aead_request_set_crypt(req, sg, sg, crypt_len, iv); aead_request_set_ad(req, assoc_data_len); aead_request_set_callback(req, CRYPTO_TFM_REQ_MAY_BACKLOG, crypto_req_done, &wait); rc = crypto_wait_req(enc ? crypto_aead_encrypt(req) : crypto_aead_decrypt(req), &wait); if (!rc && enc) memcpy(&tr_hdr->Signature, sign, SMB2_SIGNATURE_SIZE); kvfree_sensitive(creq, sensitive_size); return rc; } /* * Clear a read buffer, discarding the folios which have XA_MARK_0 set. */ static void cifs_clear_xarray_buffer(struct xarray *buffer) { struct folio *folio; XA_STATE(xas, buffer, 0); rcu_read_lock(); xas_for_each_marked(&xas, folio, ULONG_MAX, XA_MARK_0) { folio_put(folio); } rcu_read_unlock(); xa_destroy(buffer); } void smb3_free_compound_rqst(int num_rqst, struct smb_rqst *rqst) { int i; for (i = 0; i < num_rqst; i++) if (!xa_empty(&rqst[i].rq_buffer)) cifs_clear_xarray_buffer(&rqst[i].rq_buffer); } /* * This function will initialize new_rq and encrypt the content. * The first entry, new_rq[0], only contains a single iov which contains * a smb2_transform_hdr and is pre-allocated by the caller. * This function then populates new_rq[1+] with the content from olq_rq[0+]. * * The end result is an array of smb_rqst structures where the first structure * only contains a single iov for the transform header which we then can pass * to crypt_message(). * * new_rq[0].rq_iov[0] : smb2_transform_hdr pre-allocated by the caller * new_rq[1+].rq_iov[*] == old_rq[0+].rq_iov[*] : SMB2/3 requests */ static int smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *new_rq, struct smb_rqst *old_rq) { struct smb2_transform_hdr *tr_hdr = new_rq[0].rq_iov[0].iov_base; struct page *page; unsigned int orig_len = 0; int i, j; int rc = -ENOMEM; for (i = 1; i < num_rqst; i++) { struct smb_rqst *old = &old_rq[i - 1]; struct smb_rqst *new = &new_rq[i]; struct xarray *buffer = &new->rq_buffer; size_t size = iov_iter_count(&old->rq_iter), seg, copied = 0; orig_len += smb_rqst_len(server, old); new->rq_iov = old->rq_iov; new->rq_nvec = old->rq_nvec; xa_init(buffer); if (size > 0) { unsigned int npages = DIV_ROUND_UP(size, PAGE_SIZE); for (j = 0; j < npages; j++) { void *o; rc = -ENOMEM; page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!page) goto err_free; page->index = j; o = xa_store(buffer, j, page, GFP_KERNEL); if (xa_is_err(o)) { rc = xa_err(o); put_page(page); goto err_free; } xa_set_mark(buffer, j, XA_MARK_0); seg = min_t(size_t, size - copied, PAGE_SIZE); if (copy_page_from_iter(page, 0, seg, &old->rq_iter) != seg) { rc = -EFAULT; goto err_free; } copied += seg; } iov_iter_xarray(&new->rq_iter, ITER_SOURCE, buffer, 0, size); } } /* fill the 1st iov with a transform header */ fill_transform_hdr(tr_hdr, orig_len, old_rq, server->cipher_type); rc = crypt_message(server, num_rqst, new_rq, 1); cifs_dbg(FYI, "Encrypt message returned %d\n", rc); if (rc) goto err_free; return rc; err_free: smb3_free_compound_rqst(num_rqst - 1, &new_rq[1]); return rc; } static int smb3_is_transform_hdr(void *buf) { struct smb2_transform_hdr *trhdr = buf; return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM; } static int decrypt_raw_data(struct TCP_Server_Info *server, char *buf, unsigned int buf_data_size, struct iov_iter *iter, bool is_offloaded) { struct kvec iov[2]; struct smb_rqst rqst = {NULL}; size_t iter_size = 0; int rc; iov[0].iov_base = buf; iov[0].iov_len = sizeof(struct smb2_transform_hdr); iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr); iov[1].iov_len = buf_data_size; rqst.rq_iov = iov; rqst.rq_nvec = 2; if (iter) { rqst.rq_iter = *iter; iter_size = iov_iter_count(iter); } rc = crypt_message(server, 1, &rqst, 0); cifs_dbg(FYI, "Decrypt message returned %d\n", rc); if (rc) return rc; memmove(buf, iov[1].iov_base, buf_data_size); if (!is_offloaded) server->total_read = buf_data_size + iter_size; return rc; } static int cifs_copy_pages_to_iter(struct xarray *pages, unsigned int data_size, unsigned int skip, struct iov_iter *iter) { struct page *page; unsigned long index; xa_for_each(pages, index, page) { size_t n, len = min_t(unsigned int, PAGE_SIZE - skip, data_size); n = copy_page_to_iter(page, skip, len, iter); if (n != len) { cifs_dbg(VFS, "%s: something went wrong\n", __func__); return -EIO; } data_size -= n; skip = 0; } return 0; } static int handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid, char *buf, unsigned int buf_len, struct xarray *pages, unsigned int pages_len, bool is_offloaded) { unsigned int data_offset; unsigned int data_len; unsigned int cur_off; unsigned int cur_page_idx; unsigned int pad_len; struct cifs_io_subrequest *rdata = mid->callback_data; struct smb2_hdr *shdr = (struct smb2_hdr *)buf; int length; bool use_rdma_mr = false; if (shdr->Command != SMB2_READ) { cifs_server_dbg(VFS, "only big read responses are supported\n"); return -EOPNOTSUPP; } if (server->ops->is_session_expired && server->ops->is_session_expired(buf)) { if (!is_offloaded) cifs_reconnect(server, true); return -1; } if (server->ops->is_status_pending && server->ops->is_status_pending(buf, server)) return -1; /* set up first two iov to get credits */ rdata->iov[0].iov_base = buf; rdata->iov[0].iov_len = 0; rdata->iov[1].iov_base = buf; rdata->iov[1].iov_len = min_t(unsigned int, buf_len, server->vals->read_rsp_size); cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n", rdata->iov[0].iov_base, rdata->iov[0].iov_len); cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n", rdata->iov[1].iov_base, rdata->iov[1].iov_len); rdata->result = server->ops->map_error(buf, true); if (rdata->result != 0) { cifs_dbg(FYI, "%s: server returned error %d\n", __func__, rdata->result); /* normal error on read response */ if (is_offloaded) mid->mid_state = MID_RESPONSE_RECEIVED; else dequeue_mid(mid, false); return 0; } data_offset = server->ops->read_data_offset(buf); #ifdef CONFIG_CIFS_SMB_DIRECT use_rdma_mr = rdata->mr; #endif data_len = server->ops->read_data_length(buf, use_rdma_mr); if (data_offset < server->vals->read_rsp_size) { /* * win2k8 sometimes sends an offset of 0 when the read * is beyond the EOF. Treat it as if the data starts just after * the header. */ cifs_dbg(FYI, "%s: data offset (%u) inside read response header\n", __func__, data_offset); data_offset = server->vals->read_rsp_size; } else if (data_offset > MAX_CIFS_SMALL_BUFFER_SIZE) { /* data_offset is beyond the end of smallbuf */ cifs_dbg(FYI, "%s: data offset (%u) beyond end of smallbuf\n", __func__, data_offset); rdata->result = -EIO; if (is_offloaded) mid->mid_state = MID_RESPONSE_MALFORMED; else dequeue_mid(mid, rdata->result); return 0; } pad_len = data_offset - server->vals->read_rsp_size; if (buf_len <= data_offset) { /* read response payload is in pages */ cur_page_idx = pad_len / PAGE_SIZE; cur_off = pad_len % PAGE_SIZE; if (cur_page_idx != 0) { /* data offset is beyond the 1st page of response */ cifs_dbg(FYI, "%s: data offset (%u) beyond 1st page of response\n", __func__, data_offset); rdata->result = -EIO; if (is_offloaded) mid->mid_state = MID_RESPONSE_MALFORMED; else dequeue_mid(mid, rdata->result); return 0; } if (data_len > pages_len - pad_len) { /* data_len is corrupt -- discard frame */ rdata->result = -EIO; if (is_offloaded) mid->mid_state = MID_RESPONSE_MALFORMED; else dequeue_mid(mid, rdata->result); return 0; } /* Copy the data to the output I/O iterator. */ rdata->result = cifs_copy_pages_to_iter(pages, pages_len, cur_off, &rdata->subreq.io_iter); if (rdata->result != 0) { if (is_offloaded) mid->mid_state = MID_RESPONSE_MALFORMED; else dequeue_mid(mid, rdata->result); return 0; } rdata->got_bytes = pages_len; } else if (buf_len >= data_offset + data_len) { /* read response payload is in buf */ WARN_ONCE(pages && !xa_empty(pages), "read data can be either in buf or in pages"); length = copy_to_iter(buf + data_offset, data_len, &rdata->subreq.io_iter); if (length < 0) return length; rdata->got_bytes = data_len; } else { /* read response payload cannot be in both buf and pages */ WARN_ONCE(1, "buf can not contain only a part of read data"); rdata->result = -EIO; if (is_offloaded) mid->mid_state = MID_RESPONSE_MALFORMED; else dequeue_mid(mid, rdata->result); return 0; } if (is_offloaded) mid->mid_state = MID_RESPONSE_RECEIVED; else dequeue_mid(mid, false); return 0; } struct smb2_decrypt_work { struct work_struct decrypt; struct TCP_Server_Info *server; struct xarray buffer; char *buf; unsigned int len; }; static void smb2_decrypt_offload(struct work_struct *work) { struct smb2_decrypt_work *dw = container_of(work, struct smb2_decrypt_work, decrypt); int rc; struct mid_q_entry *mid; struct iov_iter iter; iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, dw->len); rc = decrypt_raw_data(dw->server, dw->buf, dw->server->vals->read_rsp_size, &iter, true); if (rc) { cifs_dbg(VFS, "error decrypting rc=%d\n", rc); goto free_pages; } dw->server->lstrp = jiffies; mid = smb2_find_dequeue_mid(dw->server, dw->buf); if (mid == NULL) cifs_dbg(FYI, "mid not found\n"); else { mid->decrypted = true; rc = handle_read_data(dw->server, mid, dw->buf, dw->server->vals->read_rsp_size, &dw->buffer, dw->len, true); if (rc >= 0) { #ifdef CONFIG_CIFS_STATS2 mid->when_received = jiffies; #endif if (dw->server->ops->is_network_name_deleted) dw->server->ops->is_network_name_deleted(dw->buf, dw->server); mid->callback(mid); } else { spin_lock(&dw->server->srv_lock); if (dw->server->tcpStatus == CifsNeedReconnect) { spin_lock(&dw->server->mid_lock); mid->mid_state = MID_RETRY_NEEDED; spin_unlock(&dw->server->mid_lock); spin_unlock(&dw->server->srv_lock); mid->callback(mid); } else { spin_lock(&dw->server->mid_lock); mid->mid_state = MID_REQUEST_SUBMITTED; mid->mid_flags &= ~(MID_DELETED); list_add_tail(&mid->qhead, &dw->server->pending_mid_q); spin_unlock(&dw->server->mid_lock); spin_unlock(&dw->server->srv_lock); } } release_mid(mid); } free_pages: cifs_clear_xarray_buffer(&dw->buffer); cifs_small_buf_release(dw->buf); kfree(dw); } static int receive_encrypted_read(struct TCP_Server_Info *server, struct mid_q_entry **mid, int *num_mids) { struct page *page; char *buf = server->smallbuf; struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; struct iov_iter iter; unsigned int len, npages; unsigned int buflen = server->pdu_size; int rc; int i = 0; struct smb2_decrypt_work *dw; dw = kzalloc(sizeof(struct smb2_decrypt_work), GFP_KERNEL); if (!dw) return -ENOMEM; xa_init(&dw->buffer); INIT_WORK(&dw->decrypt, smb2_decrypt_offload); dw->server = server; *num_mids = 1; len = min_t(unsigned int, buflen, server->vals->read_rsp_size + sizeof(struct smb2_transform_hdr)) - HEADER_SIZE(server) + 1; rc = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, len); if (rc < 0) goto free_dw; server->total_read += rc; len = le32_to_cpu(tr_hdr->OriginalMessageSize) - server->vals->read_rsp_size; dw->len = len; npages = DIV_ROUND_UP(len, PAGE_SIZE); rc = -ENOMEM; for (; i < npages; i++) { void *old; page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!page) goto discard_data; page->index = i; old = xa_store(&dw->buffer, i, page, GFP_KERNEL); if (xa_is_err(old)) { rc = xa_err(old); put_page(page); goto discard_data; } xa_set_mark(&dw->buffer, i, XA_MARK_0); } iov_iter_xarray(&iter, ITER_DEST, &dw->buffer, 0, npages * PAGE_SIZE); /* Read the data into the buffer and clear excess bufferage. */ rc = cifs_read_iter_from_socket(server, &iter, dw->len); if (rc < 0) goto discard_data; server->total_read += rc; if (rc < npages * PAGE_SIZE) iov_iter_zero(npages * PAGE_SIZE - rc, &iter); iov_iter_revert(&iter, npages * PAGE_SIZE); iov_iter_truncate(&iter, dw->len); rc = cifs_discard_remaining_data(server); if (rc) goto free_pages; /* * For large reads, offload to different thread for better performance, * use more cores decrypting which can be expensive */ if ((server->min_offload) && (server->in_flight > 1) && (server->pdu_size >= server->min_offload)) { dw->buf = server->smallbuf; server->smallbuf = (char *)cifs_small_buf_get(); queue_work(decrypt_wq, &dw->decrypt); *num_mids = 0; /* worker thread takes care of finding mid */ return -1; } rc = decrypt_raw_data(server, buf, server->vals->read_rsp_size, &iter, false); if (rc) goto free_pages; *mid = smb2_find_mid(server, buf); if (*mid == NULL) { cifs_dbg(FYI, "mid not found\n"); } else { cifs_dbg(FYI, "mid found\n"); (*mid)->decrypted = true; rc = handle_read_data(server, *mid, buf, server->vals->read_rsp_size, &dw->buffer, dw->len, false); if (rc >= 0) { if (server->ops->is_network_name_deleted) { server->ops->is_network_name_deleted(buf, server); } } } free_pages: cifs_clear_xarray_buffer(&dw->buffer); free_dw: kfree(dw); return rc; discard_data: cifs_discard_remaining_data(server); goto free_pages; } static int receive_encrypted_standard(struct TCP_Server_Info *server, struct mid_q_entry **mids, char **bufs, int *num_mids) { int ret, length; char *buf = server->smallbuf; struct smb2_hdr *shdr; unsigned int pdu_length = server->pdu_size; unsigned int buf_size; unsigned int next_cmd; struct mid_q_entry *mid_entry; int next_is_large; char *next_buffer = NULL; *num_mids = 0; /* switch to large buffer if too big for a small one */ if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE) { server->large_buf = true; memcpy(server->bigbuf, buf, server->total_read); buf = server->bigbuf; } /* now read the rest */ length = cifs_read_from_socket(server, buf + HEADER_SIZE(server) - 1, pdu_length - HEADER_SIZE(server) + 1); if (length < 0) return length; server->total_read += length; buf_size = pdu_length - sizeof(struct smb2_transform_hdr); length = decrypt_raw_data(server, buf, buf_size, NULL, false); if (length) return length; next_is_large = server->large_buf; one_more: shdr = (struct smb2_hdr *)buf; next_cmd = le32_to_cpu(shdr->NextCommand); if (next_cmd) { if (WARN_ON_ONCE(next_cmd > pdu_length)) return -1; if (next_is_large) next_buffer = (char *)cifs_buf_get(); else next_buffer = (char *)cifs_small_buf_get(); memcpy(next_buffer, buf + next_cmd, pdu_length - next_cmd); } mid_entry = smb2_find_mid(server, buf); if (mid_entry == NULL) cifs_dbg(FYI, "mid not found\n"); else { cifs_dbg(FYI, "mid found\n"); mid_entry->decrypted = true; mid_entry->resp_buf_size = server->pdu_size; } if (*num_mids >= MAX_COMPOUND) { cifs_server_dbg(VFS, "too many PDUs in compound\n"); return -1; } bufs[*num_mids] = buf; mids[(*num_mids)++] = mid_entry; if (mid_entry && mid_entry->handle) ret = mid_entry->handle(server, mid_entry); else ret = cifs_handle_standard(server, mid_entry); if (ret == 0 && next_cmd) { pdu_length -= next_cmd; server->large_buf = next_is_large; if (next_is_large) server->bigbuf = buf = next_buffer; else server->smallbuf = buf = next_buffer; goto one_more; } else if (ret != 0) { /* * ret != 0 here means that we didn't get to handle_mid() thus * server->smallbuf and server->bigbuf are still valid. We need * to free next_buffer because it is not going to be used * anywhere. */ if (next_is_large) free_rsp_buf(CIFS_LARGE_BUFFER, next_buffer); else free_rsp_buf(CIFS_SMALL_BUFFER, next_buffer); } return ret; } static int smb3_receive_transform(struct TCP_Server_Info *server, struct mid_q_entry **mids, char **bufs, int *num_mids) { char *buf = server->smallbuf; unsigned int pdu_length = server->pdu_size; struct smb2_transform_hdr *tr_hdr = (struct smb2_transform_hdr *)buf; unsigned int orig_len = le32_to_cpu(tr_hdr->OriginalMessageSize); if (pdu_length < sizeof(struct smb2_transform_hdr) + sizeof(struct smb2_hdr)) { cifs_server_dbg(VFS, "Transform message is too small (%u)\n", pdu_length); cifs_reconnect(server, true); return -ECONNABORTED; } if (pdu_length < orig_len + sizeof(struct smb2_transform_hdr)) { cifs_server_dbg(VFS, "Transform message is broken\n"); cifs_reconnect(server, true); return -ECONNABORTED; } /* TODO: add support for compounds containing READ. */ if (pdu_length > CIFSMaxBufSize + MAX_HEADER_SIZE(server)) { return receive_encrypted_read(server, &mids[0], num_mids); } return receive_encrypted_standard(server, mids, bufs, num_mids); } int smb3_handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid) { char *buf = server->large_buf ? server->bigbuf : server->smallbuf; return handle_read_data(server, mid, buf, server->pdu_size, NULL, 0, false); } static int smb2_next_header(struct TCP_Server_Info *server, char *buf, unsigned int *noff) { struct smb2_hdr *hdr = (struct smb2_hdr *)buf; struct smb2_transform_hdr *t_hdr = (struct smb2_transform_hdr *)buf; if (hdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) { *noff = le32_to_cpu(t_hdr->OriginalMessageSize); if (unlikely(check_add_overflow(*noff, sizeof(*t_hdr), noff))) return -EINVAL; } else { *noff = le32_to_cpu(hdr->NextCommand); } if (unlikely(*noff && *noff < MID_HEADER_SIZE(server))) return -EINVAL; return 0; } static int __cifs_sfu_make_node(unsigned int xid, struct inode *inode, struct dentry *dentry, struct cifs_tcon *tcon, const char *full_path, umode_t mode, dev_t dev) { struct TCP_Server_Info *server = tcon->ses->server; struct cifs_open_parms oparms; struct cifs_io_parms io_parms = {}; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); struct cifs_fid fid; unsigned int bytes_written; struct win_dev pdev = {}; struct kvec iov[2]; __u32 oplock = server->oplocks ? REQ_OPLOCK : 0; int rc; switch (mode & S_IFMT) { case S_IFCHR: strscpy(pdev.type, "IntxCHR"); pdev.major = cpu_to_le64(MAJOR(dev)); pdev.minor = cpu_to_le64(MINOR(dev)); break; case S_IFBLK: strscpy(pdev.type, "IntxBLK"); pdev.major = cpu_to_le64(MAJOR(dev)); pdev.minor = cpu_to_le64(MINOR(dev)); break; case S_IFSOCK: strscpy(pdev.type, "LnxSOCK"); break; case S_IFIFO: strscpy(pdev.type, "LnxFIFO"); break; default: return -EPERM; } oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, GENERIC_WRITE, FILE_CREATE, CREATE_NOT_DIR | CREATE_OPTION_SPECIAL, ACL_NO_MODE); oparms.fid = &fid; rc = server->ops->open(xid, &oparms, &oplock, NULL); if (rc) return rc; io_parms.pid = current->tgid; io_parms.tcon = tcon; io_parms.length = sizeof(pdev); iov[1].iov_base = &pdev; iov[1].iov_len = sizeof(pdev); rc = server->ops->sync_write(xid, &fid, &io_parms, &bytes_written, iov, 1); server->ops->close(xid, tcon, &fid); return rc; } int cifs_sfu_make_node(unsigned int xid, struct inode *inode, struct dentry *dentry, struct cifs_tcon *tcon, const char *full_path, umode_t mode, dev_t dev) { struct inode *new = NULL; int rc; rc = __cifs_sfu_make_node(xid, inode, dentry, tcon, full_path, mode, dev); if (rc) return rc; if (tcon->posix_extensions) { rc = smb311_posix_get_inode_info(&new, full_path, NULL, inode->i_sb, xid); } else if (tcon->unix_ext) { rc = cifs_get_inode_info_unix(&new, full_path, inode->i_sb, xid); } else { rc = cifs_get_inode_info(&new, full_path, NULL, inode->i_sb, xid, NULL); } if (!rc) d_instantiate(dentry, new); return rc; } static int smb2_make_node(unsigned int xid, struct inode *inode, struct dentry *dentry, struct cifs_tcon *tcon, const char *full_path, umode_t mode, dev_t dev) { struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); int rc; /* * Check if mounted with mount parm 'sfu' mount parm. * SFU emulation should work with all servers, but only * supports block and char device (no socket & fifo), * and was used by default in earlier versions of Windows */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { rc = cifs_sfu_make_node(xid, inode, dentry, tcon, full_path, mode, dev); } else { rc = smb2_mknod_reparse(xid, inode, dentry, tcon, full_path, mode, dev); } return rc; } #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY struct smb_version_operations smb20_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = cifs_wait_mtu_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb2_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb2_negotiate_wsize, .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb2_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .query_reparse_point = smb2_query_reparse_point, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .parse_reparse_point = smb2_parse_reparse_point, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .create_reparse_symlink = smb2_create_reparse_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .calc_signature = smb2_calc_signature, .is_read_op = smb2_is_read_op, .set_oplock_level = smb2_set_oplock_level, .create_lease_buf = smb2_create_lease_buf, .parse_lease_buf = smb2_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, .is_status_io_timeout = smb2_is_status_io_timeout, .is_network_name_deleted = smb2_is_network_name_deleted, }; #endif /* CIFS_ALLOW_INSECURE_LEGACY */ struct smb_version_operations smb21_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb2_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb2_negotiate_wsize, .negotiate_rsize = smb2_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb2_qfs_tcon, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .query_reparse_point = smb2_query_reparse_point, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .parse_reparse_point = smb2_parse_reparse_point, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .create_reparse_symlink = smb2_create_reparse_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .calc_signature = smb2_calc_signature, .is_read_op = smb21_is_read_op, .set_oplock_level = smb21_set_oplock_level, .create_lease_buf = smb2_create_lease_buf, .parse_lease_buf = smb2_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .enum_snapshots = smb3_enum_snapshots, .notify = smb3_notify, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, .is_status_io_timeout = smb2_is_status_io_timeout, .is_network_name_deleted = smb2_is_network_name_deleted, }; struct smb_version_operations smb30_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb3_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, .negotiate_rsize = smb3_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb3_qfs_tcon, .query_server_interfaces = SMB3_request_interfaces, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, /* WSL tags introduced long after smb2.1, enable for SMB3, 3.11 only */ .query_reparse_point = smb2_query_reparse_point, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .parse_reparse_point = smb2_parse_reparse_point, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .create_reparse_symlink = smb2_create_reparse_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb2_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb30signingkey, .calc_signature = smb3_calc_signature, .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .duplicate_extents = smb2_duplicate_extents, .validate_negotiate = smb3_validate_negotiate, .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, .notify = smb3_notify, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, .is_status_io_timeout = smb2_is_status_io_timeout, .is_network_name_deleted = smb2_is_network_name_deleted, }; struct smb_version_operations smb311_operations = { .compare_fids = smb2_compare_fids, .setup_request = smb2_setup_request, .setup_async_request = smb2_setup_async_request, .check_receive = smb2_check_receive, .add_credits = smb2_add_credits, .set_credits = smb2_set_credits, .get_credits_field = smb2_get_credits_field, .get_credits = smb2_get_credits, .wait_mtu_credits = smb2_wait_mtu_credits, .adjust_credits = smb2_adjust_credits, .get_next_mid = smb2_get_next_mid, .revert_current_mid = smb2_revert_current_mid, .read_data_offset = smb2_read_data_offset, .read_data_length = smb2_read_data_length, .map_error = map_smb2_to_linux_error, .find_mid = smb2_find_mid, .check_message = smb2_check_message, .dump_detail = smb2_dump_detail, .clear_stats = smb2_clear_stats, .print_stats = smb2_print_stats, .dump_share_caps = smb2_dump_share_caps, .is_oplock_break = smb2_is_valid_oplock_break, .handle_cancelled_mid = smb2_handle_cancelled_mid, .downgrade_oplock = smb3_downgrade_oplock, .need_neg = smb2_need_neg, .negotiate = smb2_negotiate, .negotiate_wsize = smb3_negotiate_wsize, .negotiate_rsize = smb3_negotiate_rsize, .sess_setup = SMB2_sess_setup, .logoff = SMB2_logoff, .tree_connect = SMB2_tcon, .tree_disconnect = SMB2_tdis, .qfs_tcon = smb3_qfs_tcon, .query_server_interfaces = SMB3_request_interfaces, .is_path_accessible = smb2_is_path_accessible, .can_echo = smb2_can_echo, .echo = SMB2_echo, .query_path_info = smb2_query_path_info, .query_reparse_point = smb2_query_reparse_point, .get_srv_inum = smb2_get_srv_inum, .query_file_info = smb2_query_file_info, .set_path_size = smb2_set_path_size, .set_file_size = smb2_set_file_size, .set_file_info = smb2_set_file_info, .set_compression = smb2_set_compression, .mkdir = smb2_mkdir, .mkdir_setinfo = smb2_mkdir_setinfo, .posix_mkdir = smb311_posix_mkdir, .rmdir = smb2_rmdir, .unlink = smb2_unlink, .rename = smb2_rename_path, .create_hardlink = smb2_create_hardlink, .parse_reparse_point = smb2_parse_reparse_point, .query_mf_symlink = smb3_query_mf_symlink, .create_mf_symlink = smb3_create_mf_symlink, .create_reparse_symlink = smb2_create_reparse_symlink, .open = smb2_open_file, .set_fid = smb2_set_fid, .close = smb2_close_file, .close_getattr = smb2_close_getattr, .flush = smb2_flush_file, .async_readv = smb2_async_readv, .async_writev = smb2_async_writev, .sync_read = smb2_sync_read, .sync_write = smb2_sync_write, .query_dir_first = smb2_query_dir_first, .query_dir_next = smb2_query_dir_next, .close_dir = smb2_close_dir, .calc_smb_size = smb2_calc_size, .is_status_pending = smb2_is_status_pending, .is_session_expired = smb2_is_session_expired, .oplock_response = smb2_oplock_response, .queryfs = smb311_queryfs, .mand_lock = smb2_mand_lock, .mand_unlock_range = smb2_unlock_range, .push_mand_locks = smb2_push_mandatory_locks, .get_lease_key = smb2_get_lease_key, .set_lease_key = smb2_set_lease_key, .new_lease_key = smb2_new_lease_key, .generate_signingkey = generate_smb311signingkey, .calc_signature = smb3_calc_signature, .set_integrity = smb3_set_integrity, .is_read_op = smb21_is_read_op, .set_oplock_level = smb3_set_oplock_level, .create_lease_buf = smb3_create_lease_buf, .parse_lease_buf = smb3_parse_lease_buf, .copychunk_range = smb2_copychunk_range, .duplicate_extents = smb2_duplicate_extents, /* .validate_negotiate = smb3_validate_negotiate, */ /* not used in 3.11 */ .wp_retry_size = smb2_wp_retry_size, .dir_needs_close = smb2_dir_needs_close, .fallocate = smb3_fallocate, .enum_snapshots = smb3_enum_snapshots, .notify = smb3_notify, .init_transform_rq = smb3_init_transform_rq, .is_transform_hdr = smb3_is_transform_hdr, .receive_transform = smb3_receive_transform, .get_dfs_refer = smb2_get_dfs_refer, .select_sectype = smb2_select_sectype, #ifdef CONFIG_CIFS_XATTR .query_all_EAs = smb2_query_eas, .set_EA = smb2_set_ea, #endif /* CIFS_XATTR */ .get_acl = get_smb2_acl, .get_acl_by_fid = get_smb2_acl_by_fid, .set_acl = set_smb2_acl, .next_header = smb2_next_header, .ioctl_query_info = smb2_ioctl_query_info, .make_node = smb2_make_node, .fiemap = smb3_fiemap, .llseek = smb3_llseek, .is_status_io_timeout = smb2_is_status_io_timeout, .is_network_name_deleted = smb2_is_network_name_deleted, }; #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY struct smb_version_values smb20_values = { .version_string = SMB20_VERSION_STRING, .protocol_id = SMB20_PROT_ID, .req_capabilities = 0, /* MBZ */ .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease), }; #endif /* ALLOW_INSECURE_LEGACY */ struct smb_version_values smb21_values = { .version_string = SMB21_VERSION_STRING, .protocol_id = SMB21_PROT_ID, .req_capabilities = 0, /* MBZ on negotiate req until SMB3 dialect */ .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease), }; struct smb_version_values smb3any_values = { .version_string = SMB3ANY_VERSION_STRING, .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smbdefault_values = { .version_string = SMBDEFAULT_VERSION_STRING, .protocol_id = SMB302_PROT_ID, /* doesn't matter, send protocol array */ .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb30_values = { .version_string = SMB30_VERSION_STRING, .protocol_id = SMB30_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb302_values = { .version_string = SMB302_VERSION_STRING, .protocol_id = SMB302_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), }; struct smb_version_values smb311_values = { .version_string = SMB311_VERSION_STRING, .protocol_id = SMB311_PROT_ID, .req_capabilities = SMB2_GLOBAL_CAP_DFS | SMB2_GLOBAL_CAP_LEASING | SMB2_GLOBAL_CAP_LARGE_MTU | SMB2_GLOBAL_CAP_PERSISTENT_HANDLES | SMB2_GLOBAL_CAP_ENCRYPTION | SMB2_GLOBAL_CAP_DIRECTORY_LEASING, .large_lock_type = 0, .exclusive_lock_type = SMB2_LOCKFLAG_EXCLUSIVE, .shared_lock_type = SMB2_LOCKFLAG_SHARED, .unlock_lock_type = SMB2_LOCKFLAG_UNLOCK, .header_size = sizeof(struct smb2_hdr), .header_preamble_size = 0, .max_header_size = MAX_SMB2_HDR_SIZE, .read_rsp_size = sizeof(struct smb2_read_rsp), .lock_cmd = SMB2_LOCK, .cap_unix = 0, .cap_nt_find = SMB2_NT_FIND, .cap_large_files = SMB2_LARGE_FILES, .signing_enabled = SMB2_NEGOTIATE_SIGNING_ENABLED | SMB2_NEGOTIATE_SIGNING_REQUIRED, .signing_required = SMB2_NEGOTIATE_SIGNING_REQUIRED, .create_lease_size = sizeof(struct create_lease_v2), };
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