| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Pavel Shilovsky | 1034 | 53.74% | 27 | 42.86% |
| Paulo Alcantara | 588 | 30.56% | 2 | 3.17% |
| Steve French | 175 | 9.10% | 12 | 19.05% |
| Ross Lagerwall | 35 | 1.82% | 2 | 3.17% |
| Jeff Layton | 29 | 1.51% | 6 | 9.52% |
| Pali Rohár | 16 | 0.83% | 1 | 1.59% |
| Xiong Zhou | 15 | 0.78% | 1 | 1.59% |
| Jeremy Allison | 7 | 0.36% | 1 | 1.59% |
| David Howells | 6 | 0.31% | 1 | 1.59% |
| Fabian Frederick | 4 | 0.21% | 1 | 1.59% |
| Ronnie Sahlberg | 4 | 0.21% | 2 | 3.17% |
| Stefano Brivio | 2 | 0.10% | 1 | 1.59% |
| Al Viro | 2 | 0.10% | 1 | 1.59% |
| Aurelien Aptel | 2 | 0.10% | 1 | 1.59% |
| Kees Cook | 2 | 0.10% | 1 | 1.59% |
| Hongbo Li | 1 | 0.05% | 1 | 1.59% |
| Dave Wysochanski | 1 | 0.05% | 1 | 1.59% |
| ChenXiaoSong | 1 | 0.05% | 1 | 1.59% |
| Total | 1924 | 63 |
// SPDX-License-Identifier: LGPL-2.1 /* * * Copyright (C) International Business Machines Corp., 2002, 2011 * Author(s): Steve French (sfrench@us.ibm.com), * Pavel Shilovsky ((pshilovsky@samba.org) 2012 * */ #include <linux/fs.h> #include <linux/filelock.h> #include <linux/stat.h> #include <linux/slab.h> #include <linux/pagemap.h> #include <asm/div64.h> #include "cifsfs.h" #include "cifspdu.h" #include "cifsglob.h" #include "cifsproto.h" #include "cifs_debug.h" #include "cifs_fs_sb.h" #include "cifs_unicode.h" #include "fscache.h" #include "smb2proto.h" #include "../common/smb2status.h" static struct smb2_symlink_err_rsp *symlink_data(const struct kvec *iov) { struct smb2_err_rsp *err = iov->iov_base; struct smb2_symlink_err_rsp *sym = ERR_PTR(-EINVAL); u32 len; if (err->ErrorContextCount) { struct smb2_error_context_rsp *p, *end; len = (u32)err->ErrorContextCount * (offsetof(struct smb2_error_context_rsp, ErrorContextData) + sizeof(struct smb2_symlink_err_rsp)); if (le32_to_cpu(err->ByteCount) < len || iov->iov_len < len + sizeof(*err) + 1) return ERR_PTR(-EINVAL); p = (struct smb2_error_context_rsp *)err->ErrorData; end = (struct smb2_error_context_rsp *)((u8 *)err + iov->iov_len); do { if (le32_to_cpu(p->ErrorId) == SMB2_ERROR_ID_DEFAULT) { sym = (struct smb2_symlink_err_rsp *)&p->ErrorContextData; break; } cifs_dbg(FYI, "%s: skipping unhandled error context: 0x%x\n", __func__, le32_to_cpu(p->ErrorId)); len = ALIGN(le32_to_cpu(p->ErrorDataLength), 8); p = (struct smb2_error_context_rsp *)((u8 *)&p->ErrorContextData + len); } while (p < end); } else if (le32_to_cpu(err->ByteCount) >= sizeof(*sym) && iov->iov_len >= SMB2_SYMLINK_STRUCT_SIZE) { sym = (struct smb2_symlink_err_rsp *)err->ErrorData; } if (!IS_ERR(sym) && (le32_to_cpu(sym->SymLinkErrorTag) != SYMLINK_ERROR_TAG || le32_to_cpu(sym->ReparseTag) != IO_REPARSE_TAG_SYMLINK)) sym = ERR_PTR(-EINVAL); return sym; } int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec *iov, const char *full_path, char **path) { struct smb2_symlink_err_rsp *sym; unsigned int sub_offs, sub_len; unsigned int print_offs, print_len; if (!cifs_sb || !iov || !iov->iov_base || !iov->iov_len || !path) return -EINVAL; sym = symlink_data(iov); if (IS_ERR(sym)) return PTR_ERR(sym); sub_len = le16_to_cpu(sym->SubstituteNameLength); sub_offs = le16_to_cpu(sym->SubstituteNameOffset); print_len = le16_to_cpu(sym->PrintNameLength); print_offs = le16_to_cpu(sym->PrintNameOffset); if (iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + sub_offs + sub_len || iov->iov_len < SMB2_SYMLINK_STRUCT_SIZE + print_offs + print_len) return -EINVAL; return smb2_parse_native_symlink(path, (char *)sym->PathBuffer + sub_offs, sub_len, true, le32_to_cpu(sym->Flags) & SYMLINK_FLAG_RELATIVE, full_path, cifs_sb); } int smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms, __u32 *oplock, void *buf) { int rc; __le16 *smb2_path; __u8 smb2_oplock; struct cifs_open_info_data *data = buf; struct smb2_file_all_info file_info = {}; struct smb2_file_all_info *smb2_data = data ? &file_info : NULL; struct kvec err_iov = {}; int err_buftype = CIFS_NO_BUFFER; struct cifs_fid *fid = oparms->fid; struct network_resiliency_req nr_ioctl_req; smb2_path = cifs_convert_path_to_utf16(oparms->path, oparms->cifs_sb); if (smb2_path == NULL) return -ENOMEM; oparms->desired_access |= FILE_READ_ATTRIBUTES; smb2_oplock = SMB2_OPLOCK_LEVEL_BATCH; rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL, &err_iov, &err_buftype); if (rc && data) { struct smb2_hdr *hdr = err_iov.iov_base; if (unlikely(!err_iov.iov_base || err_buftype == CIFS_NO_BUFFER)) goto out; if (hdr->Status == STATUS_STOPPED_ON_SYMLINK) { rc = smb2_parse_symlink_response(oparms->cifs_sb, &err_iov, oparms->path, &data->symlink_target); if (!rc) { memset(smb2_data, 0, sizeof(*smb2_data)); oparms->create_options |= OPEN_REPARSE_POINT; rc = SMB2_open(xid, oparms, smb2_path, &smb2_oplock, smb2_data, NULL, NULL, NULL); oparms->create_options &= ~OPEN_REPARSE_POINT; } } } if (rc) goto out; if (oparms->tcon->use_resilient) { /* default timeout is 0, servers pick default (120 seconds) */ nr_ioctl_req.Timeout = cpu_to_le32(oparms->tcon->handle_timeout); nr_ioctl_req.Reserved = 0; rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid, fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY, (char *)&nr_ioctl_req, sizeof(nr_ioctl_req), CIFSMaxBufSize, NULL, NULL /* no return info */); if (rc == -EOPNOTSUPP) { cifs_dbg(VFS, "resiliency not supported by server, disabling\n"); oparms->tcon->use_resilient = false; } else if (rc) cifs_dbg(FYI, "error %d setting resiliency\n", rc); rc = 0; } if (smb2_data) { /* if open response does not have IndexNumber field - get it */ if (smb2_data->IndexNumber == 0) { rc = SMB2_get_srv_num(xid, oparms->tcon, fid->persistent_fid, fid->volatile_fid, &smb2_data->IndexNumber); if (rc) { /* * let get_inode_info disable server inode * numbers */ smb2_data->IndexNumber = 0; rc = 0; } } memcpy(&data->fi, smb2_data, sizeof(data->fi)); } *oplock = smb2_oplock; out: free_rsp_buf(err_buftype, err_iov.iov_base); kfree(smb2_path); return rc; } int smb2_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, const unsigned int xid) { int rc = 0, stored_rc; unsigned int max_num, num = 0, max_buf; struct smb2_lock_element *buf, *cur; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); struct cifsLockInfo *li, *tmp; __u64 length = 1 + flock->fl_end - flock->fl_start; LIST_HEAD(tmp_llist); /* * Accessing maxBuf is racy with cifs_reconnect - need to store value * and check it before using. */ max_buf = tcon->ses->server->maxBuf; if (max_buf < sizeof(struct smb2_lock_element)) return -EINVAL; BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE); max_buf = min_t(unsigned int, max_buf, PAGE_SIZE); max_num = max_buf / sizeof(struct smb2_lock_element); buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL); if (!buf) return -ENOMEM; cur = buf; cifs_down_write(&cinode->lock_sem); list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { if (flock->fl_start > li->offset || (flock->fl_start + length) < (li->offset + li->length)) continue; if (current->tgid != li->pid) /* * flock and OFD lock are associated with an open * file description, not the process. */ if (!(flock->c.flc_flags & (FL_FLOCK | FL_OFDLCK))) continue; if (cinode->can_cache_brlcks) { /* * We can cache brlock requests - simply remove a lock * from the file's list. */ list_del(&li->llist); cifs_del_lock_waiters(li); kfree(li); continue; } cur->Length = cpu_to_le64(li->length); cur->Offset = cpu_to_le64(li->offset); cur->Flags = cpu_to_le32(SMB2_LOCKFLAG_UNLOCK); /* * We need to save a lock here to let us add it again to the * file's list if the unlock range request fails on the server. */ list_move(&li->llist, &tmp_llist); if (++num == max_num) { stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, num, buf); if (stored_rc) { /* * We failed on the unlock range request - add * all locks from the tmp list to the head of * the file's list. */ cifs_move_llist(&tmp_llist, &cfile->llist->locks); rc = stored_rc; } else /* * The unlock range request succeed - free the * tmp list. */ cifs_free_llist(&tmp_llist); cur = buf; num = 0; } else cur++; } if (num) { stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, num, buf); if (stored_rc) { cifs_move_llist(&tmp_llist, &cfile->llist->locks); rc = stored_rc; } else cifs_free_llist(&tmp_llist); } up_write(&cinode->lock_sem); kfree(buf); return rc; } static int smb2_push_mand_fdlocks(struct cifs_fid_locks *fdlocks, const unsigned int xid, struct smb2_lock_element *buf, unsigned int max_num) { int rc = 0, stored_rc; struct cifsFileInfo *cfile = fdlocks->cfile; struct cifsLockInfo *li; unsigned int num = 0; struct smb2_lock_element *cur = buf; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); list_for_each_entry(li, &fdlocks->locks, llist) { cur->Length = cpu_to_le64(li->length); cur->Offset = cpu_to_le64(li->offset); cur->Flags = cpu_to_le32(li->type | SMB2_LOCKFLAG_FAIL_IMMEDIATELY); if (++num == max_num) { stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, num, buf); if (stored_rc) rc = stored_rc; cur = buf; num = 0; } else cur++; } if (num) { stored_rc = smb2_lockv(xid, tcon, cfile->fid.persistent_fid, cfile->fid.volatile_fid, current->tgid, num, buf); if (stored_rc) rc = stored_rc; } return rc; } int smb2_push_mandatory_locks(struct cifsFileInfo *cfile) { int rc = 0, stored_rc; unsigned int xid; unsigned int max_num, max_buf; struct smb2_lock_element *buf; struct cifsInodeInfo *cinode = CIFS_I(d_inode(cfile->dentry)); struct cifs_fid_locks *fdlocks; xid = get_xid(); /* * Accessing maxBuf is racy with cifs_reconnect - need to store value * and check it for zero before using. */ max_buf = tlink_tcon(cfile->tlink)->ses->server->maxBuf; if (max_buf < sizeof(struct smb2_lock_element)) { free_xid(xid); return -EINVAL; } BUILD_BUG_ON(sizeof(struct smb2_lock_element) > PAGE_SIZE); max_buf = min_t(unsigned int, max_buf, PAGE_SIZE); max_num = max_buf / sizeof(struct smb2_lock_element); buf = kcalloc(max_num, sizeof(struct smb2_lock_element), GFP_KERNEL); if (!buf) { free_xid(xid); return -ENOMEM; } list_for_each_entry(fdlocks, &cinode->llist, llist) { stored_rc = smb2_push_mand_fdlocks(fdlocks, xid, buf, max_num); if (stored_rc) rc = stored_rc; } kfree(buf); free_xid(xid); return rc; }