diff options
Diffstat (limited to 'fs/cifs/file.c')
| -rw-r--r-- | fs/cifs/file.c | 1545 |
1 files changed, 908 insertions, 637 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 513adbc211d7..1e57f36ea1b2 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -43,6 +43,7 @@ #include "cifs_fs_sb.h" #include "fscache.h" + static inline int cifs_convert_flags(unsigned int flags) { if ((flags & O_ACCMODE) == O_RDONLY) @@ -72,10 +73,14 @@ static u32 cifs_posix_convert_flags(unsigned int flags) else if ((flags & O_ACCMODE) == O_RDWR) posix_flags = SMB_O_RDWR; - if (flags & O_CREAT) + if (flags & O_CREAT) { posix_flags |= SMB_O_CREAT; - if (flags & O_EXCL) - posix_flags |= SMB_O_EXCL; + if (flags & O_EXCL) + posix_flags |= SMB_O_EXCL; + } else if (flags & O_EXCL) + cifs_dbg(FYI, "Application %s pid %d has incorrectly set O_EXCL flag but not O_CREAT on file open. Ignoring O_EXCL\n", + current->comm, current->tgid); + if (flags & O_TRUNC) posix_flags |= SMB_O_TRUNC; /* be safe and imply O_SYNC for O_DSYNC */ @@ -107,7 +112,7 @@ static inline int cifs_get_disposition(unsigned int flags) int cifs_posix_open(char *full_path, struct inode **pinode, struct super_block *sb, int mode, unsigned int f_flags, - __u32 *poplock, __u16 *pnetfid, int xid) + __u32 *poplock, __u16 *pnetfid, unsigned int xid) { int rc; FILE_UNIX_BASIC_INFO *presp_data; @@ -117,7 +122,7 @@ int cifs_posix_open(char *full_path, struct inode **pinode, struct tcon_link *tlink; struct cifs_tcon *tcon; - cFYI(1, "posix open %s", full_path); + cifs_dbg(FYI, "posix open %s\n", full_path); presp_data = kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); if (presp_data == NULL) @@ -169,16 +174,21 @@ posix_open_ret: static int cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, - struct cifs_tcon *tcon, unsigned int f_flags, __u32 *poplock, - __u16 *pnetfid, int xid) + struct cifs_tcon *tcon, unsigned int f_flags, __u32 *oplock, + struct cifs_fid *fid, unsigned int xid) { int rc; - int desiredAccess; + int desired_access; int disposition; int create_options = CREATE_NOT_DIR; FILE_ALL_INFO *buf; + struct TCP_Server_Info *server = tcon->ses->server; + struct cifs_open_parms oparms; - desiredAccess = cifs_convert_flags(f_flags); + if (!server->ops->open) + return -ENOSYS; + + desired_access = cifs_convert_flags(f_flags); /********************************************************************* * open flag mapping table: @@ -215,16 +225,16 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; - if (tcon->ses->capabilities & CAP_NT_SMBS) - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, - desiredAccess, create_options, pnetfid, poplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); - else - rc = SMBLegacyOpen(xid, tcon, full_path, disposition, - desiredAccess, CREATE_NOT_DIR, pnetfid, poplock, buf, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags - & CIFS_MOUNT_MAP_SPECIAL_CHR); + oparms.tcon = tcon; + oparms.cifs_sb = cifs_sb; + oparms.desired_access = desired_access; + oparms.create_options = create_options; + oparms.disposition = disposition; + oparms.path = full_path; + oparms.fid = fid; + oparms.reconnect = false; + + rc = server->ops->open(xid, &oparms, oplock, buf); if (rc) goto out; @@ -234,55 +244,108 @@ cifs_nt_open(char *full_path, struct inode *inode, struct cifs_sb_info *cifs_sb, xid); else rc = cifs_get_inode_info(&inode, full_path, buf, inode->i_sb, - xid, pnetfid); + xid, &fid->netfid); out: kfree(buf); return rc; } +static bool +cifs_has_mand_locks(struct cifsInodeInfo *cinode) +{ + struct cifs_fid_locks *cur; + bool has_locks = false; + + down_read(&cinode->lock_sem); + list_for_each_entry(cur, &cinode->llist, llist) { + if (!list_empty(&cur->locks)) { + has_locks = true; + break; + } + } + up_read(&cinode->lock_sem); + return has_locks; +} + struct cifsFileInfo * -cifs_new_fileinfo(__u16 fileHandle, struct file *file, +cifs_new_fileinfo(struct cifs_fid *fid, struct file *file, struct tcon_link *tlink, __u32 oplock) { struct dentry *dentry = file->f_path.dentry; struct inode *inode = dentry->d_inode; - struct cifsInodeInfo *pCifsInode = CIFS_I(inode); - struct cifsFileInfo *pCifsFile; - - pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); - if (pCifsFile == NULL) - return pCifsFile; - - pCifsFile->count = 1; - pCifsFile->netfid = fileHandle; - pCifsFile->pid = current->tgid; - pCifsFile->uid = current_fsuid(); - pCifsFile->dentry = dget(dentry); - pCifsFile->f_flags = file->f_flags; - pCifsFile->invalidHandle = false; - pCifsFile->tlink = cifs_get_tlink(tlink); - mutex_init(&pCifsFile->fh_mutex); - INIT_WORK(&pCifsFile->oplock_break, cifs_oplock_break); - INIT_LIST_HEAD(&pCifsFile->llist); + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifsFileInfo *cfile; + struct cifs_fid_locks *fdlocks; + struct cifs_tcon *tcon = tlink_tcon(tlink); + struct TCP_Server_Info *server = tcon->ses->server; + + cfile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); + if (cfile == NULL) + return cfile; + + fdlocks = kzalloc(sizeof(struct cifs_fid_locks), GFP_KERNEL); + if (!fdlocks) { + kfree(cfile); + return NULL; + } + + INIT_LIST_HEAD(&fdlocks->locks); + fdlocks->cfile = cfile; + cfile->llist = fdlocks; + down_write(&cinode->lock_sem); + list_add(&fdlocks->llist, &cinode->llist); + up_write(&cinode->lock_sem); + + cfile->count = 1; + cfile->pid = current->tgid; + cfile->uid = current_fsuid(); + cfile->dentry = dget(dentry); + cfile->f_flags = file->f_flags; + cfile->invalidHandle = false; + cfile->tlink = cifs_get_tlink(tlink); + INIT_WORK(&cfile->oplock_break, cifs_oplock_break); + mutex_init(&cfile->fh_mutex); + + cifs_sb_active(inode->i_sb); + + /* + * If the server returned a read oplock and we have mandatory brlocks, + * set oplock level to None. + */ + if (oplock == server->vals->oplock_read && + cifs_has_mand_locks(cinode)) { + cifs_dbg(FYI, "Reset oplock val from read to None due to mand locks\n"); + oplock = 0; + } spin_lock(&cifs_file_list_lock); - list_add(&pCifsFile->tlist, &(tlink_tcon(tlink)->openFileList)); + if (fid->pending_open->oplock != CIFS_OPLOCK_NO_CHANGE && oplock) + oplock = fid->pending_open->oplock; + list_del(&fid->pending_open->olist); + + server->ops->set_fid(cfile, fid, oplock); + + list_add(&cfile->tlist, &tcon->openFileList); /* if readable file instance put first in list*/ if (file->f_mode & FMODE_READ) - list_add(&pCifsFile->flist, &pCifsInode->openFileList); + list_add(&cfile->flist, &cinode->openFileList); else - list_add_tail(&pCifsFile->flist, &pCifsInode->openFileList); + list_add_tail(&cfile->flist, &cinode->openFileList); spin_unlock(&cifs_file_list_lock); - cifs_set_oplock_level(pCifsInode, oplock); - pCifsInode->can_cache_brlcks = pCifsInode->clientCanCacheAll; - - file->private_data = pCifsFile; - return pCifsFile; + file->private_data = cfile; + return cfile; } -static void cifs_del_lock_waiters(struct cifsLockInfo *lock); +struct cifsFileInfo * +cifsFileInfo_get(struct cifsFileInfo *cifs_file) +{ + spin_lock(&cifs_file_list_lock); + cifsFileInfo_get_locked(cifs_file); + spin_unlock(&cifs_file_list_lock); + return cifs_file; +} /* * Release a reference on the file private data. This may involve closing @@ -293,9 +356,13 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) { struct inode *inode = cifs_file->dentry->d_inode; struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink); + struct TCP_Server_Info *server = tcon->ses->server; struct cifsInodeInfo *cifsi = CIFS_I(inode); - struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct super_block *sb = inode->i_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifsLockInfo *li, *tmp; + struct cifs_fid fid; + struct cifs_pending_open open; spin_lock(&cifs_file_list_lock); if (--cifs_file->count > 0) { @@ -303,20 +370,26 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) return; } + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + + /* store open in pending opens to make sure we don't miss lease break */ + cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open); + /* remove it from the lists */ list_del(&cifs_file->flist); list_del(&cifs_file->tlist); if (list_empty(&cifsi->openFileList)) { - cFYI(1, "closing last open instance for inode %p", - cifs_file->dentry->d_inode); - - /* in strict cache mode we need invalidate mapping on the last - close because it may cause a error when we open this file - again and get at least level II oplock */ + cifs_dbg(FYI, "closing last open instance for inode %p\n", + cifs_file->dentry->d_inode); + /* + * In strict cache mode we need invalidate mapping on the last + * close because it may cause a error when we open this file + * again and get at least level II oplock. + */ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) CIFS_I(inode)->invalid_mapping = true; - cifs_set_oplock_level(cifsi, 0); } spin_unlock(&cifs_file_list_lock); @@ -324,51 +397,63 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file) cancel_work_sync(&cifs_file->oplock_break); if (!tcon->need_reconnect && !cifs_file->invalidHandle) { - int xid, rc; + struct TCP_Server_Info *server = tcon->ses->server; + unsigned int xid; - xid = GetXid(); - rc = CIFSSMBClose(xid, tcon, cifs_file->netfid); - FreeXid(xid); + xid = get_xid(); + if (server->ops->close) + server->ops->close(xid, tcon, &cifs_file->fid); + _free_xid(xid); } - /* Delete any outstanding lock records. We'll lose them when the file + cifs_del_pending_open(&open); + + /* + * Delete any outstanding lock records. We'll lose them when the file * is closed anyway. */ - mutex_lock(&cifsi->lock_mutex); - list_for_each_entry_safe(li, tmp, &cifs_file->llist, llist) { + down_write(&cifsi->lock_sem); + list_for_each_entry_safe(li, tmp, &cifs_file->llist->locks, llist) { list_del(&li->llist); cifs_del_lock_waiters(li); kfree(li); } - mutex_unlock(&cifsi->lock_mutex); + list_del(&cifs_file->llist->llist); + kfree(cifs_file->llist); + up_write(&cifsi->lock_sem); cifs_put_tlink(cifs_file->tlink); dput(cifs_file->dentry); + cifs_sb_deactive(sb); kfree(cifs_file); } int cifs_open(struct inode *inode, struct file *file) + { int rc = -EACCES; - int xid; + unsigned int xid; __u32 oplock; struct cifs_sb_info *cifs_sb; + struct TCP_Server_Info *server; struct cifs_tcon *tcon; struct tcon_link *tlink; - struct cifsFileInfo *pCifsFile = NULL; + struct cifsFileInfo *cfile = NULL; char *full_path = NULL; bool posix_open_ok = false; - __u16 netfid; + struct cifs_fid fid; + struct cifs_pending_open open; - xid = GetXid(); + xid = get_xid(); cifs_sb = CIFS_SB(inode->i_sb); tlink = cifs_sb_tlink(cifs_sb); if (IS_ERR(tlink)) { - FreeXid(xid); + free_xid(xid); return PTR_ERR(tlink); } tcon = tlink_tcon(tlink); + server = tcon->ses->server; full_path = build_path_from_dentry(file->f_path.dentry); if (full_path == NULL) { @@ -376,51 +461,61 @@ int cifs_open(struct inode *inode, struct file *file) goto out; } - cFYI(1, "inode = 0x%p file flags are 0x%x for %s", + cifs_dbg(FYI, "inode = 0x%p file flags are 0x%x for %s\n", inode, file->f_flags, full_path); - if (tcon->ses->server->oplocks) + if (server->oplocks) oplock = REQ_OPLOCK; else oplock = 0; if (!tcon->broken_posix_open && tcon->unix_ext && - (tcon->ses->capabilities & CAP_UNIX) && - (CIFS_UNIX_POSIX_PATH_OPS_CAP & - le64_to_cpu(tcon->fsUnixInfo.Capability))) { + cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & + le64_to_cpu(tcon->fsUnixInfo.Capability))) { /* can not refresh inode info since size could be stale */ rc = cifs_posix_open(full_path, &inode, inode->i_sb, cifs_sb->mnt_file_mode /* ignored */, - file->f_flags, &oplock, &netfid, xid); + file->f_flags, &oplock, &fid.netfid, xid); if (rc == 0) { - cFYI(1, "posix open succeeded"); + cifs_dbg(FYI, "posix open succeeded\n"); posix_open_ok = true; } else if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { if (tcon->ses->serverNOS) - cERROR(1, "server %s of type %s returned" - " unexpected error on SMB posix open" - ", disabling posix open support." - " Check if server update available.", - tcon->ses->serverName, - tcon->ses->serverNOS); + cifs_dbg(VFS, "server %s of type %s returned unexpected error on SMB posix open, disabling posix open support. Check if server update available.\n", + tcon->ses->serverName, + tcon->ses->serverNOS); tcon->broken_posix_open = true; } else if ((rc != -EIO) && (rc != -EREMOTE) && (rc != -EOPNOTSUPP)) /* path not found or net err */ goto out; - /* else fallthrough to retry open the old way on network i/o - or DFS errors */ + /* + * Else fallthrough to retry open the old way on network i/o + * or DFS errors. + */ } + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + + cifs_add_pending_open(&fid, tlink, &open); + if (!posix_open_ok) { + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &fid); + rc = cifs_nt_open(full_path, inode, cifs_sb, tcon, - file->f_flags, &oplock, &netfid, xid); - if (rc) + file->f_flags, &oplock, &fid, xid); + if (rc) { + cifs_del_pending_open(&open); goto out; + } } - pCifsFile = cifs_new_fileinfo(netfid, file, tlink, oplock); - if (pCifsFile == NULL) { - CIFSSMBClose(xid, tcon, netfid); + cfile = cifs_new_fileinfo(&fid, file, tlink, oplock); + if (cfile == NULL) { + if (server->ops->close) + server->ops->close(xid, tcon, &fid); + cifs_del_pending_open(&open); rc = -ENOMEM; goto out; } @@ -428,162 +523,207 @@ int cifs_open(struct inode *inode, struct file *file) cifs_fscache_set_inode_cookie(inode, file); if ((oplock & CIFS_CREATE_ACTION) && !posix_open_ok && tcon->unix_ext) { - /* time to set mode which we can not set earlier due to - problems creating new read-only files */ + /* + * Time to set mode which we can not set earlier due to + * problems creating new read-only files. + */ struct cifs_unix_set_info_args args = { .mode = inode->i_mode, - .uid = NO_CHANGE_64, - .gid = NO_CHANGE_64, + .uid = INVALID_UID, /* no change */ + .gid = INVALID_GID, /* no change */ .ctime = NO_CHANGE_64, .atime = NO_CHANGE_64, .mtime = NO_CHANGE_64, .device = 0, }; - CIFSSMBUnixSetFileInfo(xid, tcon, &args, netfid, - pCifsFile->pid); + CIFSSMBUnixSetFileInfo(xid, tcon, &args, fid.netfid, + cfile->pid); } out: kfree(full_path); - FreeXid(xid); + free_xid(xid); cifs_put_tlink(tlink); return rc; } -/* Try to reacquire byte range locks that were released when session */ -/* to server was lost */ -static int cifs_relock_file(struct cifsFileInfo *cifsFile) +static int cifs_push_posix_locks(struct cifsFileInfo *cfile); + +/* + * Try to reacquire byte range locks that were released when session + * to server was lost. + */ +static int +cifs_relock_file(struct cifsFileInfo *cfile) { + struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; -/* BB list all locks open on this file and relock */ + down_read(&cinode->lock_sem); + if (cinode->can_cache_brlcks) { + /* can cache locks - no need to relock */ + up_read(&cinode->lock_sem); + return rc; + } + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + rc = cifs_push_posix_locks(cfile); + else + rc = tcon->ses->server->ops->push_mand_locks(cfile); + + up_read(&cinode->lock_sem); return rc; } -static int cifs_reopen_file(struct cifsFileInfo *pCifsFile, bool can_flush) +static int +cifs_reopen_file(struct cifsFileInfo *cfile, bool can_flush) { int rc = -EACCES; - int xid; + unsigned int xid; __u32 oplock; struct cifs_sb_info *cifs_sb; struct cifs_tcon *tcon; - struct cifsInodeInfo *pCifsInode; + struct TCP_Server_Info *server; + struct cifsInodeInfo *cinode; struct inode *inode; char *full_path = NULL; - int desiredAccess; + int desired_access; int disposition = FILE_OPEN; int create_options = CREATE_NOT_DIR; - __u16 netfid; + struct cifs_open_parms oparms; - xid = GetXid(); - mutex_lock(&pCifsFile->fh_mutex); - if (!pCifsFile->invalidHandle) { - mutex_unlock(&pCifsFile->fh_mutex); + xid = get_xid(); + mutex_lock(&cfile->fh_mutex); + if (!cfile->invalidHandle) { + mutex_unlock(&cfile->fh_mutex); rc = 0; - FreeXid(xid); + free_xid(xid); return rc; } - inode = pCifsFile->dentry->d_inode; + inode = cfile->dentry->d_inode; cifs_sb = CIFS_SB(inode->i_sb); - tcon = tlink_tcon(pCifsFile->tlink); + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; -/* can not grab rename sem here because various ops, including - those that already have the rename sem can end up causing writepage - to get called and if the server was down that means we end up here, - and we can never tell if the caller already has the rename_sem */ - full_path = build_path_from_dentry(pCifsFile->dentry); + /* + * Can not grab rename sem here because various ops, including those + * that already have the rename sem can end up causing writepage to get + * called and if the server was down that means we end up here, and we + * can never tell if the caller already has the rename_sem. + */ + full_path = build_path_from_dentry(cfile->dentry); if (full_path == NULL) { rc = -ENOMEM; - mutex_unlock(&pCifsFile->fh_mutex); - FreeXid(xid); + mutex_unlock(&cfile->fh_mutex); + free_xid(xid); return rc; } - cFYI(1, "inode = 0x%p file flags 0x%x for %s", - inode, pCifsFile->f_flags, full_path); + cifs_dbg(FYI, "inode = 0x%p file flags 0x%x for %s\n", + inode, cfile->f_flags, full_path); if (tcon->ses->server->oplocks) oplock = REQ_OPLOCK; else oplock = 0; - if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && + if (tcon->unix_ext && cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & - le64_to_cpu(tcon->fsUnixInfo.Capability))) { - + le64_to_cpu(tcon->fsUnixInfo.Capability))) { /* * O_CREAT, O_EXCL and O_TRUNC already had their effect on the * original open. Must mask them off for a reopen. */ - unsigned int oflags = pCifsFile->f_flags & + unsigned int oflags = cfile->f_flags & ~(O_CREAT | O_EXCL | O_TRUNC); rc = cifs_posix_open(full_path, NULL, inode->i_sb, - cifs_sb->mnt_file_mode /* ignored */, - oflags, &oplock, &netfid, xid); + cifs_sb->mnt_file_mode /* ignored */, + oflags, &oplock, &cfile->fid.netfid, xid); if (rc == 0) { - cFYI(1, "posix reopen succeeded"); + cifs_dbg(FYI, "posix reopen succeeded\n"); goto reopen_success; } - /* fallthrough to retry open the old way on errors, especially - in the reconnect path it is important to retry hard */ + /* + * fallthrough to retry open the old way on errors, especially + * in the reconnect path it is important to retry hard + */ } - desiredAccess = cifs_convert_flags(pCifsFile->f_flags); + desired_access = cifs_convert_flags(cfile->f_flags); if (backup_cred(cifs_sb)) create_options |= CREATE_OPEN_BACKUP_INTENT; - /* Can not refresh inode by passing in file_info buf to be returned - by SMBOpen and then calling get_inode_info with returned buf - since file might have write behind data that needs to be flushed - and server version of file size can be stale. If we knew for sure - that inode was not dirty locally we could do this */ + if (server->ops->get_lease_key) + server->ops->get_lease_key(inode, &cfile->fid); + + oparms.tcon = tcon; + oparms.cifs_sb = cifs_sb; + oparms.desired_access = desired_access; + oparms.create_options = create_options; + oparms.disposition = disposition; + oparms.path = full_path; + oparms.fid = &cfile->fid; + oparms.reconnect = true; + + /* + * Can not refresh inode by passing in file_info buf to be returned by + * CIFSSMBOpen and then calling get_inode_info with returned buf since + * file might have write behind data that needs to be flushed and server + * version of file size can be stale. If we knew for sure that inode was + * not dirty locally we could do this. + */ + rc = server->ops->open(xid, &oparms, &oplock, NULL); + if (rc == -ENOENT && oparms.reconnect == false) { + /* durable handle timeout is expired - open the file again */ + rc = server->ops->open(xid, &oparms, &oplock, NULL); + /* indicate that we need to relock the file */ + oparms.reconnect = true; + } - rc = CIFSSMBOpen(xid, tcon, full_path, disposition, desiredAccess, - create_options, &netfid, &oplock, NULL, - cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & - CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc) { - mutex_unlock(&pCifsFile->fh_mutex); - cFYI(1, "cifs_open returned 0x%x", rc); - cFYI(1, "oplock: %d", oplock); + mutex_unlock(&cfile->fh_mutex); + cifs_dbg(FYI, "cifs_reopen returned 0x%x\n", rc); + cifs_dbg(FYI, "oplock: %d\n", oplock); goto reopen_error_exit; } reopen_success: - pCifsFile->netfid = netfid; - pCifsFile->invalidHandle = false; - mutex_unlock(&pCifsFile->fh_mutex); - pCifsInode = CIFS_I(inode); + cfile->invalidHandle = false; + mutex_unlock(&cfile->fh_mutex); + cinode = CIFS_I(inode); if (can_flush) { rc = filemap_write_and_wait(inode->i_mapping); mapping_set_error(inode->i_mapping, rc); if (tcon->unix_ext) - rc = cifs_get_inode_info_unix(&inode, - full_path, inode->i_sb, xid); + rc = cifs_get_inode_info_unix(&inode, full_path, + inode->i_sb, xid); else - rc = cifs_get_inode_info(&inode, - full_path, NULL, inode->i_sb, - xid, NULL); - } /* else we are writing out data to server already - and could deadlock if we tried to flush data, and - since we do not know if we have data that would - invalidate the current end of file on the server - we can not go to the server to get the new inod - info */ - - cifs_set_oplock_level(pCifsInode, oplock); + rc = cifs_get_inode_info(&inode, full_path, NULL, + inode->i_sb, xid, NULL); + } + /* + * Else we are writing out data to server already and could deadlock if + * we tried to flush data, and since we do not know if we have data that + * would invalidate the current end of file on the server we can not go + * to the server to get the new inode info. + */ - cifs_relock_file(pCifsFile); + server->ops->set_fid(cfile, &cfile->fid, oplock); + if (oparms.reconnect) + cifs_relock_file(cfile); reopen_error_exit: kfree(full_path); - FreeXid(xid); + free_xid(xid); return rc; } @@ -601,45 +741,51 @@ int cifs_close(struct inode *inode, struct file *file) int cifs_closedir(struct inode *inode, struct file *file) { int rc = 0; - int xid; - struct cifsFileInfo *pCFileStruct = file->private_data; - char *ptmp; + unsigned int xid; + struct cifsFileInfo *cfile = file->private_data; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + char *buf; - cFYI(1, "Closedir inode = 0x%p", inode); + cifs_dbg(FYI, "Closedir inode = 0x%p\n", inode); - xid = GetXid(); + if (cfile == NULL) + return rc; - if (pCFileStruct) { - struct cifs_tcon *pTcon = tlink_tcon(pCFileStruct->tlink); + xid = get_xid(); + tcon = tlink_tcon(cfile->tlink); + server = tcon->ses->server; - cFYI(1, "Freeing private data in close dir"); - spin_lock(&cifs_file_list_lock); - if (!pCFileStruct->srch_inf.endOfSearch && - !pCFileStruct->invalidHandle) { - pCFileStruct->invalidHandle = true; - spin_unlock(&cifs_file_list_lock); - rc = CIFSFindClose(xid, pTcon, pCFileStruct->netfid); - cFYI(1, "Closing uncompleted readdir with rc %d", - rc); - /* not much we can do if it fails anyway, ignore rc */ - rc = 0; - } else - spin_unlock(&cifs_file_list_lock); - ptmp = pCFileStruct->srch_inf.ntwrk_buf_start; - if (ptmp) { - cFYI(1, "closedir free smb buf in srch struct"); - pCFileStruct->srch_inf.ntwrk_buf_start = NULL; - if (pCFileStruct->srch_inf.smallBuf) - cifs_small_buf_release(ptmp); - else - cifs_buf_release(ptmp); - } - cifs_put_tlink(pCFileStruct->tlink); - kfree(file->private_data); - file->private_data = NULL; + cifs_dbg(FYI, "Freeing private data in close dir\n"); + spin_lock(&cifs_file_list_lock); + if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) { + cfile->invalidHandle = true; + spin_unlock(&cifs_file_list_lock); + if (server->ops->close_dir) + rc = server->ops->close_dir(xid, tcon, &cfile->fid); + else + rc = -ENOSYS; + cifs_dbg(FYI, "Closing uncompleted readdir with rc %d\n", rc); + /* not much we can do if it fails anyway, ignore rc */ + rc = 0; + } else + spin_unlock(&cifs_file_list_lock); + + buf = cfile->srch_inf.ntwrk_buf_start; + if (buf) { + cifs_dbg(FYI, "closedir free smb buf in srch struct\n"); + cfile->srch_inf.ntwrk_buf_start = NULL; + if (cfile->srch_inf.smallBuf) + cifs_small_buf_release(buf); + else + cifs_buf_release(buf); } + + cifs_put_tlink(cfile->tlink); + kfree(file->private_data); + file->private_data = NULL; /* BB can we lock the filestruct while this is going on? */ - FreeXid(xid); + free_xid(xid); return rc; } @@ -659,7 +805,7 @@ cifs_lock_init(__u64 offset, __u64 length, __u8 type) return lock; } -static void +void cifs_del_lock_waiters(struct cifsLockInfo *lock) { struct cifsLockInfo *li, *tmp; @@ -669,46 +815,57 @@ cifs_del_lock_waiters(struct cifsLockInfo *lock) } } +#define CIFS_LOCK_OP 0 +#define CIFS_READ_OP 1 +#define CIFS_WRITE_OP 2 + +/* @rw_check : 0 - no op, 1 - read, 2 - write */ static bool -cifs_find_fid_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, - __u64 length, __u8 type, struct cifsFileInfo *cur, - struct cifsLockInfo **conf_lock) +cifs_find_fid_lock_conflict(struct cifs_fid_locks *fdlocks, __u64 offset, + __u64 length, __u8 type, struct cifsFileInfo *cfile, + struct cifsLockInfo **conf_lock, int rw_check) { struct cifsLockInfo *li; + struct cifsFileInfo *cur_cfile = fdlocks->cfile; struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; - list_for_each_entry(li, &cfile->llist, llist) { + list_for_each_entry(li, &fdlocks->locks, llist) { if (offset + length <= li->offset || offset >= li->offset + li->length) continue; - else if ((type & server->vals->shared_lock_type) && - ((server->ops->compare_fids(cur, cfile) && - current->tgid == li->pid) || type == li->type)) + if (rw_check != CIFS_LOCK_OP && current->tgid == li->pid && + server->ops->compare_fids(cfile, cur_cfile)) { + /* shared lock prevents write op through the same fid */ + if (!(li->type & server->vals->shared_lock_type) || + rw_check != CIFS_WRITE_OP) + continue; + } + if ((type & server->vals->shared_lock_type) && + ((server->ops->compare_fids(cfile, cur_cfile) && + current->tgid == li->pid) || type == li->type)) continue; - else { + if (conf_lock) *conf_lock = li; - return true; - } + return true; } return false; } -static bool +bool cifs_find_lock_conflict(struct cifsFileInfo *cfile, __u64 offset, __u64 length, - __u8 type, struct cifsLockInfo **conf_lock) + __u8 type, struct cifsLockInfo **conf_lock, + int rw_check) { bool rc = false; - struct cifsFileInfo *fid, *tmp; + struct cifs_fid_locks *cur; struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); - spin_lock(&cifs_file_list_lock); - list_for_each_entry_safe(fid, tmp, &cinode->openFileList, flist) { - rc = cifs_find_fid_lock_conflict(fid, offset, length, type, - cfile, conf_lock); + list_for_each_entry(cur, &cinode->llist, llist) { + rc = cifs_find_fid_lock_conflict(cur, offset, length, type, + cfile, conf_lock, rw_check); if (rc) break; } - spin_unlock(&cifs_file_list_lock); return rc; } @@ -730,10 +887,10 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length, struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; bool exist; - mutex_lock(&cinode->lock_mutex); + down_read(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, offset, length, type, - &conf_lock); + &conf_lock, CIFS_LOCK_OP); if (exist) { flock->fl_start = conf_lock->offset; flock->fl_end = conf_lock->offset + conf_lock->length - 1; @@ -747,7 +904,7 @@ cifs_lock_test(struct cifsFileInfo *cfile, __u64 offset, __u64 length, else flock->fl_type = F_UNLCK; - mutex_unlock(&cinode->lock_mutex); + up_read(&cinode->lock_sem); return rc; } @@ -755,9 +912,9 @@ static void cifs_lock_add(struct cifsFileInfo *cfile, struct cifsLockInfo *lock) { struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); - mutex_lock(&cinode->lock_mutex); - list_add_tail(&lock->llist, &cfile->llist); - mutex_unlock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); + list_add_tail(&lock->llist, &cfile->llist->locks); + up_write(&cinode->lock_sem); } /* @@ -777,13 +934,13 @@ cifs_lock_add_if(struct cifsFileInfo *cfile, struct cifsLockInfo *lock, try_again: exist = false; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); exist = cifs_find_lock_conflict(cfile, lock->offset, lock->length, - lock->type, &conf_lock); + lock->type, &conf_lock, CIFS_LOCK_OP); if (!exist && cinode->can_cache_brlcks) { - list_add_tail(&lock->llist, &cfile->llist); - mutex_unlock(&cinode->lock_mutex); + list_add_tail(&lock->llist, &cfile->llist->locks); + up_write(&cinode->lock_sem); return rc; } @@ -793,17 +950,17 @@ try_again: rc = -EACCES; else { list_add_tail(&lock->blist, &conf_lock->blist); - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); rc = wait_event_interruptible(lock->block_q, (lock->blist.prev == &lock->blist) && (lock->blist.next == &lock->blist)); if (!rc) goto try_again; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); list_del_init(&lock->blist); } - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); return rc; } @@ -818,13 +975,13 @@ static int cifs_posix_lock_test(struct file *file, struct file_lock *flock) { int rc = 0; - struct cifsInodeInfo *cinode = CIFS_I(file->f_path.dentry->d_inode); + struct cifsInodeInfo *cinode = CIFS_I(file_inode(file)); unsigned char saved_type = flock->fl_type; if ((flock->fl_flags & FL_POSIX) == 0) return 1; - mutex_lock(&cinode->lock_mutex); + down_read(&cinode->lock_sem); posix_test_lock(file, flock); if (flock->fl_type == F_UNLCK && !cinode->can_cache_brlcks) { @@ -832,7 +989,7 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock) rc = 1; } - mutex_unlock(&cinode->lock_mutex); + up_read(&cinode->lock_sem); return rc; } @@ -845,61 +1002,53 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock) static int cifs_posix_lock_set(struct file *file, struct file_lock *flock) { - struct cifsInodeInfo *cinode = CIFS_I(file->f_path.dentry->d_inode); + struct cifsInodeInfo *cinode = CIFS_I(file_inode(file)); int rc = 1; if ((flock->fl_flags & FL_POSIX) == 0) return rc; try_again: - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); return rc; } rc = posix_lock_file(file, flock, NULL); - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); if (rc == FILE_LOCK_DEFERRED) { rc = wait_event_interruptible(flock->fl_wait, !flock->fl_next); if (!rc) goto try_again; - locks_delete_block(flock); + posix_unblock_lock(flock); } return rc; } -static int +int cifs_push_mandatory_locks(struct cifsFileInfo *cfile) { - int xid, rc = 0, stored_rc; + unsigned int xid; + int rc = 0, stored_rc; struct cifsLockInfo *li, *tmp; struct cifs_tcon *tcon; - struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); unsigned int num, max_num, max_buf; LOCKING_ANDX_RANGE *buf, *cur; int types[] = {LOCKING_ANDX_LARGE_FILES, LOCKING_ANDX_SHARED_LOCK | LOCKING_ANDX_LARGE_FILES}; int i; - xid = GetXid(); + xid = get_xid(); tcon = tlink_tcon(cfile->tlink); - mutex_lock(&cinode->lock_mutex); - if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); - FreeXid(xid); - return rc; - } - /* * Accessing maxBuf is racy with cifs_reconnect - need to store value * and check it for zero before using. */ max_buf = tcon->ses->server->maxBuf; if (!max_buf) { - mutex_unlock(&cinode->lock_mutex); - FreeXid(xid); + free_xid(xid); return -EINVAL; } @@ -907,15 +1056,14 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) sizeof(LOCKING_ANDX_RANGE); buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); if (!buf) { - mutex_unlock(&cinode->lock_mutex); - FreeXid(xid); - return rc; + free_xid(xid); + return -ENOMEM; } for (i = 0; i < 2; i++) { cur = buf; num = 0; - list_for_each_entry_safe(li, tmp, &cfile->llist, llist) { + list_for_each_entry_safe(li, tmp, &cfile->llist->locks, llist) { if (li->type != types[i]) continue; cur->Pid = cpu_to_le16(li->pid); @@ -924,7 +1072,8 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) cur->OffsetLow = cpu_to_le32((u32)li->offset); cur->OffsetHigh = cpu_to_le32((u32)(li->offset>>32)); if (++num == max_num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, + cfile->fid.netfid, (__u8)li->type, 0, num, buf); if (stored_rc) @@ -936,18 +1085,15 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) } if (num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid, (__u8)types[i], 0, num, buf); if (stored_rc) rc = stored_rc; } } - cinode->can_cache_brlcks = false; - mutex_unlock(&cinode->lock_mutex); - kfree(buf); - FreeXid(xid); + free_xid(xid); return rc; } @@ -968,7 +1114,7 @@ struct lock_to_push { static int cifs_push_posix_locks(struct cifsFileInfo *cfile) { - struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct inode *inode = cfile->dentry->d_inode; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct file_lock *flock, **before; unsigned int count = 0, i = 0; @@ -977,27 +1123,20 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) struct lock_to_push *lck, *tmp; __u64 length; - xid = GetXid(); + xid = get_xid(); - mutex_lock(&cinode->lock_mutex); - if (!cinode->can_cache_brlcks) { - mutex_unlock(&cinode->lock_mutex); - FreeXid(xid); - return rc; - } - - lock_flocks(); - cifs_for_each_lock(cfile->dentry->d_inode, before) { + spin_lock(&inode->i_lock); + cifs_for_each_lock(inode, before) { if ((*before)->fl_flags & FL_POSIX) count++; } - unlock_flocks(); + spin_unlock(&inode->i_lock); INIT_LIST_HEAD(&locks_to_send); /* * Allocating count locks is enough because no FL_POSIX locks can be - * added to the list while we are holding cinode->lock_mutex that + * added to the list while we are holding cinode->lock_sem that * protects locking operations of this inode. */ for (; i < count; i++) { @@ -1010,8 +1149,8 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) } el = locks_to_send.next; - lock_flocks(); - cifs_for_each_lock(cfile->dentry->d_inode, before) { + spin_lock(&inode->i_lock); + cifs_for_each_lock(inode, before) { flock = *before; if ((flock->fl_flags & FL_POSIX) == 0) continue; @@ -1020,7 +1159,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) * The list ended. We don't have enough allocated * structures - something is really wrong. */ - cERROR(1, "Can't push all brlocks!"); + cifs_dbg(VFS, "Can't push all brlocks!\n"); break; } length = 1 + flock->fl_end - flock->fl_start; @@ -1030,21 +1169,19 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) type = CIFS_WRLCK; lck = list_entry(el, struct lock_to_push, llist); lck->pid = flock->fl_pid; - lck->netfid = cfile->netfid; + lck->netfid = cfile->fid.netfid; lck->length = length; lck->type = type; lck->offset = flock->fl_start; el = el->next; } - unlock_flocks(); + spin_unlock(&inode->i_lock); list_for_each_entry_safe(lck, tmp, &locks_to_send, llist) { - struct file_lock tmp_lock; int stored_rc; - tmp_lock.fl_start = lck->offset; stored_rc = CIFSSMBPosixLock(xid, tcon, lck->netfid, lck->pid, - 0, lck->length, &tmp_lock, + lck->offset, lck->length, NULL, lck->type, 0); if (stored_rc) rc = stored_rc; @@ -1053,10 +1190,7 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) } out: - cinode->can_cache_brlcks = false; - mutex_unlock(&cinode->lock_mutex); - - FreeXid(xid); + free_xid(xid); return rc; err_out: list_for_each_entry_safe(lck, tmp, &locks_to_send, llist) { @@ -1070,14 +1204,27 @@ static int cifs_push_locks(struct cifsFileInfo *cfile) { struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); + struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + int rc = 0; + + /* we are going to update can_cache_brlcks here - need a write access */ + down_write(&cinode->lock_sem); + if (!cinode->can_cache_brlcks) { + up_write(&cinode->lock_sem); + return rc; + } - if ((tcon->ses->capabilities & CAP_UNIX) && + if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) - return cifs_push_posix_locks(cfile); + rc = cifs_push_posix_locks(cfile); + else + rc = tcon->ses->server->ops->push_mand_locks(cfile); - return cifs_push_mandatory_locks(cfile); + cinode->can_cache_brlcks = false; + up_write(&cinode->lock_sem); + return rc; } static void @@ -1085,67 +1232,58 @@ cifs_read_flock(struct file_lock *flock, __u32 *type, int *lock, int *unlock, bool *wait_flag, struct TCP_Server_Info *server) { if (flock->fl_flags & FL_POSIX) - cFYI(1, "Posix"); + cifs_dbg(FYI, "Posix\n"); if (flock->fl_flags & FL_FLOCK) - cFYI(1, "Flock"); + cifs_dbg(FYI, "Flock\n"); if (flock->fl_flags & FL_SLEEP) { - cFYI(1, "Blocking lock"); + cifs_dbg(FYI, "Blocking lock\n"); *wait_flag = true; } if (flock->fl_flags & FL_ACCESS) - cFYI(1, "Process suspended by mandatory locking - " - "not implemented yet"); + cifs_dbg(FYI, "Process suspended by mandatory locking - not implemented yet\n"); if (flock->fl_flags & FL_LEASE) - cFYI(1, "Lease on file - not implemented yet"); + cifs_dbg(FYI, "Lease on file - not implemented yet\n"); if (flock->fl_flags & - (~(FL_POSIX | FL_FLOCK | FL_SLEEP | FL_ACCESS | FL_LEASE))) - cFYI(1, "Unknown lock flags 0x%x", flock->fl_flags); + (~(FL_POSIX | FL_FLOCK | FL_SLEEP | + FL_ACCESS | FL_LEASE | FL_CLOSE))) + cifs_dbg(FYI, "Unknown lock flags 0x%x\n", flock->fl_flags); *type = server->vals->large_lock_type; if (flock->fl_type == F_WRLCK) { - cFYI(1, "F_WRLCK "); + cifs_dbg(FYI, "F_WRLCK\n"); *type |= server->vals->exclusive_lock_type; *lock = 1; } else if (flock->fl_type == F_UNLCK) { - cFYI(1, "F_UNLCK"); + cifs_dbg(FYI, "F_UNLCK\n"); *type |= server->vals->unlock_lock_type; *unlock = 1; /* Check if unlock includes more than one lock range */ } else if (flock->fl_type == F_RDLCK) { - cFYI(1, "F_RDLCK"); + cifs_dbg(FYI, "F_RDLCK\n"); *type |= server->vals->shared_lock_type; *lock = 1; } else if (flock->fl_type == F_EXLCK) { - cFYI(1, "F_EXLCK"); + cifs_dbg(FYI, "F_EXLCK\n"); *type |= server->vals->exclusive_lock_type; *lock = 1; } else if (flock->fl_type == F_SHLCK) { - cFYI(1, "F_SHLCK"); + cifs_dbg(FYI, "F_SHLCK\n"); *type |= server->vals->shared_lock_type; *lock = 1; } else - cFYI(1, "Unknown type of lock"); -} - -static int -cifs_mandatory_lock(int xid, struct cifsFileInfo *cfile, __u64 offset, - __u64 length, __u32 type, int lock, int unlock, bool wait) -{ - return CIFSSMBLock(xid, tlink_tcon(cfile->tlink), cfile->netfid, - current->tgid, length, offset, unlock, lock, - (__u8)type, wait, 0); + cifs_dbg(FYI, "Unknown type of lock\n"); } static int cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, - bool wait_flag, bool posix_lck, int xid) + bool wait_flag, bool posix_lck, unsigned int xid) { int rc = 0; __u64 length = 1 + flock->fl_end - flock->fl_start; struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; - __u16 netfid = cfile->netfid; + __u16 netfid = cfile->fid.netfid; if (posix_lck) { int posix_lock_type; @@ -1159,7 +1297,7 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, else posix_lock_type = CIFS_WRLCK; rc = CIFSSMBPosixLock(xid, tcon, netfid, current->tgid, - 1 /* get */, length, flock, + flock->fl_start, length, flock, posix_lock_type, wait_flag); return rc; } @@ -1169,15 +1307,15 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, return rc; /* BB we could chain these into one lock request BB */ - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, type, - 1, 0, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, type, + 1, 0, false); if (rc == 0) { - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type, 0, 1, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type, 0, 1, false); flock->fl_type = F_UNLCK; if (rc != 0) - cERROR(1, "Error unlocking previously locked " - "range %d during test of lock", rc); + cifs_dbg(VFS, "Error unlocking previously locked range %d during test of lock\n", + rc); return 0; } @@ -1186,24 +1324,25 @@ cifs_getlk(struct file *file, struct file_lock *flock, __u32 type, return 0; } - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type | server->vals->shared_lock_type, 1, 0, - false); + type &= ~server->vals->exclusive_lock_type; + + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type | server->vals->shared_lock_type, + 1, 0, false); if (rc == 0) { - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type | server->vals->shared_lock_type, - 0, 1, false); + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type | server->vals->shared_lock_type, 0, 1, false); flock->fl_type = F_RDLCK; if (rc != 0) - cERROR(1, "Error unlocking previously locked " - "range %d during test of lock", rc); + cifs_dbg(VFS, "Error unlocking previously locked range %d during test of lock\n", + rc); } else flock->fl_type = F_WRLCK; return 0; } -static void +void cifs_move_llist(struct list_head *source, struct list_head *dest) { struct list_head *li, *tmp; @@ -1211,7 +1350,7 @@ cifs_move_llist(struct list_head *source, struct list_head *dest) list_move(li, dest); } -static void +void cifs_free_llist(struct list_head *llist) { struct cifsLockInfo *li, *tmp; @@ -1222,8 +1361,9 @@ cifs_free_llist(struct list_head *llist) } } -static int -cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, int xid) +int +cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, + unsigned int xid) { int rc = 0, stored_rc; int types[] = {LOCKING_ANDX_LARGE_FILES, @@ -1253,11 +1393,11 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, int xid) if (!buf) return -ENOMEM; - mutex_lock(&cinode->lock_mutex); + down_write(&cinode->lock_sem); for (i = 0; i < 2; i++) { cur = buf; num = 0; - list_for_each_entry_safe(li, tmp, &cfile->llist, llist) { + 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)) @@ -1288,7 +1428,8 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, int xid) */ list_move(&li->llist, &tmp_llist); if (++num == max_num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, + cfile->fid.netfid, li->type, num, 0, buf); if (stored_rc) { /* @@ -1297,7 +1438,7 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, int xid) * list to the head of the file's list. */ cifs_move_llist(&tmp_llist, - &cfile->llist); + &cfile->llist->locks); rc = stored_rc; } else /* @@ -1311,31 +1452,33 @@ cifs_unlock_range(struct cifsFileInfo *cfile, struct file_lock *flock, int xid) cur++; } if (num) { - stored_rc = cifs_lockv(xid, tcon, cfile->netfid, + stored_rc = cifs_lockv(xid, tcon, cfile->fid.netfid, types[i], num, 0, buf); if (stored_rc) { - cifs_move_llist(&tmp_llist, &cfile->llist); + cifs_move_llist(&tmp_llist, + &cfile->llist->locks); rc = stored_rc; } else cifs_free_llist(&tmp_llist); } } - mutex_unlock(&cinode->lock_mutex); + up_write(&cinode->lock_sem); kfree(buf); return rc; } static int -cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, - bool wait_flag, bool posix_lck, int lock, int unlock, int xid) +cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, + bool wait_flag, bool posix_lck, int lock, int unlock, + unsigned int xid) { int rc = 0; __u64 length = 1 + flock->fl_end - flock->fl_start; struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct TCP_Server_Info *server = tcon->ses->server; - __u16 netfid = cfile->netfid; + struct inode *inode = cfile->dentry->d_inode; if (posix_lck) { int posix_lock_type; @@ -1352,9 +1495,9 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, if (unlock == 1) posix_lock_type = CIFS_UNLCK; - rc = CIFSSMBPosixLock(xid, tcon, netfid, current->tgid, - 0 /* set */, length, flock, - posix_lock_type, wait_flag); + rc = CIFSSMBPosixLock(xid, tcon, cfile->fid.netfid, + current->tgid, flock->fl_start, length, + NULL, posix_lock_type, wait_flag); goto out; } @@ -1366,21 +1509,38 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type, return -ENOMEM; rc = cifs_lock_add_if(cfile, lock, wait_flag); - if (rc < 0) + if (rc < 0) { kfree(lock); - if (rc <= 0) + return rc; + } + if (!rc) goto out; - rc = cifs_mandatory_lock(xid, cfile, flock->fl_start, length, - type, 1, 0, wait_flag); + /* + * Windows 7 server can delay breaking lease from read to None + * if we set a byte-range lock on a file - break it explicitly + * before sending the lock to the server to be sure the next + * read won't conflict with non-overlapted locks due to + * pagereading. + */ + if (!CIFS_I(inode)->clientCanCacheAll && + CIFS_I(inode)->clientCanCacheRead) { + cifs_invalidate_mapping(inode); + cifs_dbg(FYI, "Set no oplock for inode=%p due to mand locks\n", + inode); + CIFS_I(inode)->clientCanCacheRead = false; + } + + rc = server->ops->mand_lock(xid, cfile, flock->fl_start, length, + type, 1, 0, wait_flag); if (rc) { kfree(lock); - goto out; + return rc; } cifs_lock_add(cfile, lock); } else if (unlock) - rc = cifs_unlock_range(cfile, flock, xid); + rc = server->ops->mand_unlock_range(cfile, flock, xid); out: if (flock->fl_flags & FL_POSIX) @@ -1402,11 +1562,11 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) __u32 type; rc = -EACCES; - xid = GetXid(); + xid = get_xid(); - cFYI(1, "Lock parm: 0x%x flockflags: 0x%x flocktype: 0x%x start: %lld " - "end: %lld", cmd, flock->fl_flags, flock->fl_type, - flock->fl_start, flock->fl_end); + cifs_dbg(FYI, "Lock parm: 0x%x flockflags: 0x%x flocktype: 0x%x start: %lld end: %lld\n", + cmd, flock->fl_flags, flock->fl_type, + flock->fl_start, flock->fl_end); cfile = (struct cifsFileInfo *)file->private_data; tcon = tlink_tcon(cfile->tlink); @@ -1415,10 +1575,10 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) tcon->ses->server); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); - netfid = cfile->netfid; - cinode = CIFS_I(file->f_path.dentry->d_inode); + netfid = cfile->fid.netfid; + cinode = CIFS_I(file_inode(file)); - if ((tcon->ses->capabilities & CAP_UNIX) && + if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) posix_lck = true; @@ -1428,7 +1588,7 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) */ if (IS_GETLK(cmd)) { rc = cifs_getlk(file, flock, type, wait_flag, posix_lck, xid); - FreeXid(xid); + free_xid(xid); return rc; } @@ -1437,13 +1597,13 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *flock) * if no lock or unlock then nothing to do since we do not * know what it is */ - FreeXid(xid); + free_xid(xid); return -EOPNOTSUPP; } rc = cifs_setlk(file, flock, type, wait_flag, posix_lck, lock, unlock, xid); - FreeXid(xid); + free_xid(xid); return rc; } @@ -1461,28 +1621,33 @@ cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset, cifsi->server_eof = end_of_write; } -static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, - const char *write_data, size_t write_size, - loff_t *poffset) +static ssize_t +cifs_write(struct cifsFileInfo *open_file, __u32 pid, const char *write_data, + size_t write_size, loff_t *offset) { int rc = 0; unsigned int bytes_written = 0; unsigned int total_written; struct cifs_sb_info *cifs_sb; - struct cifs_tcon *pTcon; - int xid; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + unsigned int xid; struct dentry *dentry = open_file->dentry; struct cifsInodeInfo *cifsi = CIFS_I(dentry->d_inode); struct cifs_io_parms io_parms; cifs_sb = CIFS_SB(dentry->d_sb); - cFYI(1, "write %zd bytes to offset %lld of %s", write_size, - *poffset, dentry->d_name.name); + cifs_dbg(FYI, "write %zd bytes to offset %lld of %s\n", + write_size, *offset, dentry->d_name.name); + + tcon = tlink_tcon(open_file->tlink); + server = tcon->ses->server; - pTcon = tlink_tcon(open_file->tlink); + if (!server->ops->sync_write) + return -ENOSYS; - xid = GetXid(); + xid = get_xid(); for (total_written = 0; write_size > total_written; total_written += bytes_written) { @@ -1506,39 +1671,38 @@ static ssize_t cifs_write(struct cifsFileInfo *open_file, __u32 pid, /* iov[0] is reserved for smb header */ iov[1].iov_base = (char *)write_data + total_written; iov[1].iov_len = len; - io_parms.netfid = open_file->netfid; io_parms.pid = pid; - io_parms.tcon = pTcon; - io_parms.offset = *poffset; + io_parms.tcon = tcon; + io_parms.offset = *offset; io_parms.length = len; - rc = CIFSSMBWrite2(xid, &io_parms, &bytes_written, iov, - 1, 0); + rc = server->ops->sync_write(xid, open_file, &io_parms, + &bytes_written, iov, 1); } if (rc || (bytes_written == 0)) { if (total_written) break; else { - FreeXid(xid); + free_xid(xid); return rc; } } else { spin_lock(&dentry->d_inode->i_lock); - cifs_update_eof(cifsi, *poffset, bytes_written); + cifs_update_eof(cifsi, *offset, bytes_written); spin_unlock(&dentry->d_inode->i_lock); - *poffset += bytes_written; + *offset += bytes_written; } } - cifs_stats_bytes_written(pTcon, total_written); + cifs_stats_bytes_written(tcon, total_written); if (total_written > 0) { spin_lock(&dentry->d_inode->i_lock); - if (*poffset > dentry->d_inode->i_size) - i_size_write(dentry->d_inode, *poffset); + if (*offset > dentry->d_inode->i_size) + i_size_write(dentry->d_inode, *offset); spin_unlock(&dentry->d_inode->i_lock); } mark_inode_dirty_sync(dentry->d_inode); - FreeXid(xid); + free_xid(xid); return total_written; } @@ -1557,13 +1721,13 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode, are always at the end of the list but since the first entry might have a close pending, we go through the whole list */ list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { - if (fsuid_only && open_file->uid != current_fsuid()) + if (fsuid_only && !uid_eq(open_file->uid, current_fsuid())) continue; if (OPEN_FMODE(open_file->f_flags) & FMODE_READ) { if (!open_file->invalidHandle) { /* found a good file */ /* lock it so it will not be closed on us */ - cifsFileInfo_get(open_file); + cifsFileInfo_get_locked(open_file); spin_unlock(&cifs_file_list_lock); return open_file; } /* else might as well continue, and look for @@ -1590,7 +1754,7 @@ struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode, it being zero) during stress testcases so we need to check for it */ if (cifs_inode == NULL) { - cERROR(1, "Null inode passed to cifs_writeable_file"); + cifs_dbg(VFS, "Null inode passed to cifs_writeable_file\n"); dump_stack(); return NULL; } @@ -1610,12 +1774,12 @@ refind_writable: list_for_each_entry(open_file, &cifs_inode->openFileList, flist) { if (!any_available && open_file->pid != current->tgid) continue; - if (fsuid_only && open_file->uid != current_fsuid()) + if (fsuid_only && !uid_eq(open_file->uid, current_fsuid())) continue; if (OPEN_FMODE(open_file->f_flags) & FMODE_WRITE) { if (!open_file->invalidHandle) { /* found a good writable file */ - cifsFileInfo_get(open_file); + cifsFileInfo_get_locked(open_file); spin_unlock(&cifs_file_list_lock); return open_file; } else { @@ -1632,7 +1796,7 @@ refind_writable: if (inv_file) { any_available = false; - cifsFileInfo_get(inv_file); + cifsFileInfo_get_locked(inv_file); } spin_unlock(&cifs_file_list_lock); @@ -1702,7 +1866,7 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) else if (bytes_written < 0) rc = bytes_written; } else { - cFYI(1, "No writeable filehandles for inode"); + cifs_dbg(FYI, "No writeable filehandles for inode\n"); rc = -EIO; } @@ -1710,27 +1874,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) return rc; } -/* - * Marshal up the iov array, reserving the first one for the header. Also, - * set wdata->bytes. - */ -static void -cifs_writepages_marshal_iov(struct kvec *iov, struct cifs_writedata *wdata) -{ - int i; - struct inode *inode = wdata->cfile->dentry->d_inode; - loff_t size = i_size_read(inode); - - /* marshal up the pages into iov array */ - wdata->bytes = 0; - for (i = 0; i < wdata->nr_pages; i++) { - iov[i + 1].iov_len = min(size - page_offset(wdata->pages[i]), - (loff_t)PAGE_CACHE_SIZE); - iov[i + 1].iov_base = kmap(wdata->pages[i]); - wdata->bytes += iov[i + 1].iov_len; - } -} - static int cifs_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1738,6 +1881,7 @@ static int cifs_writepages(struct address_space *mapping, bool done = false, scanned = false, range_whole = false; pgoff_t end, index; struct cifs_writedata *wdata; + struct TCP_Server_Info *server; struct page *page; int rc = 0; @@ -1844,7 +1988,7 @@ retry: */ set_page_writeback(page); - if (page_offset(page) >= mapping->host->i_size) { + if (page_offset(page) >= i_size_read(mapping->host)) { done = true; unlock_page(page); end_page_writeback(page); @@ -1875,7 +2019,13 @@ retry: wdata->sync_mode = wbc->sync_mode; wdata->nr_pages = nr_pages; wdata->offset = page_offset(wdata->pages[0]); - wdata->marshal_iov = cifs_writepages_marshal_iov; + wdata->pagesz = PAGE_CACHE_SIZE; + wdata->tailsz = + min(i_size_read(mapping->host) - + page_offset(wdata->pages[nr_pages - 1]), + (loff_t)PAGE_CACHE_SIZE); + wdata->bytes = ((nr_pages - 1) * PAGE_CACHE_SIZE) + + wdata->tailsz; do { if (wdata->cfile != NULL) @@ -1883,12 +2033,13 @@ retry: wdata->cfile = find_writable_file(CIFS_I(mapping->host), false); if (!wdata->cfile) { - cERROR(1, "No writable handles for inode"); + cifs_dbg(VFS, "No writable handles for inode\n"); rc = -EBADF; break; } wdata->pid = wdata->cfile->pid; - rc = cifs_async_writev(wdata); + server = tlink_tcon(wdata->cfile->tlink)->ses->server; + rc = server->ops->async_writev(wdata); } while (wbc->sync_mode == WB_SYNC_ALL && rc == -EAGAIN); for (i = 0; i < nr_pages; ++i) @@ -1937,13 +2088,13 @@ static int cifs_writepage_locked(struct page *page, struct writeback_control *wbc) { int rc; - int xid; + unsigned int xid; - xid = GetXid(); + xid = get_xid(); /* BB add check for wbc flags */ page_cache_get(page); if (!PageUptodate(page)) - cFYI(1, "ppw - page not up to date"); + cifs_dbg(FYI, "ppw - page not up to date\n"); /* * Set the "writeback" flag, and clear "dirty" in the radix tree. @@ -1968,7 +2119,7 @@ retry_write: SetPageUptodate(page); end_page_writeback(page); page_cache_release(page); - FreeXid(xid); + free_xid(xid); return rc; } @@ -1994,7 +2145,7 @@ static int cifs_write_end(struct file *file, struct address_space *mapping, else pid = current->tgid; - cFYI(1, "write_end for page %p from pos %lld with %d bytes", + cifs_dbg(FYI, "write_end for page %p from pos %lld with %d bytes\n", page, pos, copied); if (PageChecked(page)) { @@ -2007,9 +2158,9 @@ static int cifs_write_end(struct file *file, struct address_space *mapping, if (!PageUptodate(page)) { char *page_data; unsigned offset = pos & (PAGE_CACHE_SIZE - 1); - int xid; + unsigned int xid; - xid = GetXid(); + xid = get_xid(); /* this is probably better than directly calling partialpage_write since in this function the file handle is known which we might as well leverage */ @@ -2020,7 +2171,7 @@ static int cifs_write_end(struct file *file, struct address_space *mapping, /* if (rc < 0) should we set writebehind rc? */ kunmap(page); - FreeXid(xid); + free_xid(xid); } else { rc = copied; pos += copied; @@ -2043,11 +2194,12 @@ static int cifs_write_end(struct file *file, struct address_space *mapping, int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, int datasync) { - int xid; + unsigned int xid; int rc = 0; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct cifsFileInfo *smbfile = file->private_data; - struct inode *inode = file->f_path.dentry->d_inode; + struct inode *inode = file_inode(file); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); rc = filemap_write_and_wait_range(inode->i_mapping, start, end); @@ -2055,33 +2207,39 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end, return rc; mutex_lock(&inode->i_mutex); - xid = GetXid(); + xid = get_xid(); - cFYI(1, "Sync file - name: %s datasync: 0x%x", - file->f_path.dentry->d_name.name, datasync); + cifs_dbg(FYI, "Sync file - name: %s datasync: 0x%x\n", + file->f_path.dentry->d_name.name, datasync); if (!CIFS_I(inode)->clientCanCacheRead) { rc = cifs_invalidate_mapping(inode); if (rc) { - cFYI(1, "rc: %d during invalidate phase", rc); + cifs_dbg(FYI, "rc: %d during invalidate phase\n", rc); rc = 0; /* don't care about it in fsync */ } } tcon = tlink_tcon(smbfile->tlink); - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) - rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { + server = tcon->ses->server; + if (server->ops->flush) + rc = server->ops->flush(xid, tcon, &smbfile->fid); + else + rc = -ENOSYS; + } - FreeXid(xid); + free_xid(xid); mutex_unlock(&inode->i_mutex); return rc; } int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) { - int xid; + unsigned int xid; int rc = 0; struct cifs_tcon *tcon; + struct TCP_Server_Info *server; struct cifsFileInfo *smbfile = file->private_data; struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); struct inode *inode = file->f_mapping->host; @@ -2091,16 +2249,21 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) return rc; mutex_lock(&inode->i_mutex); - xid = GetXid(); + xid = get_xid(); - cFYI(1, "Sync file - name: %s datasync: 0x%x", - file->f_path.dentry->d_name.name, datasync); + cifs_dbg(FYI, "Sync file - name: %s datasync: 0x%x\n", + file->f_path.dentry->d_name.name, datasync); tcon = tlink_tcon(smbfile->tlink); - if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) - rc = CIFSSMBFlush(xid, tcon, smbfile->netfid); + if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC)) { + server = tcon->ses->server; + if (server->ops->flush) + rc = server->ops->flush(xid, tcon, &smbfile->fid); + else + rc = -ENOSYS; + } - FreeXid(xid); + free_xid(xid); mutex_unlock(&inode->i_mutex); return rc; } @@ -2111,13 +2274,13 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync) */ int cifs_flush(struct file *file, fl_owner_t id) { - struct inode *inode = file->f_path.dentry->d_inode; + struct inode *inode = file_inode(file); int rc = 0; if (file->f_mode & FMODE_WRITE) rc = filemap_write_and_wait(inode->i_mapping); - cFYI(1, "Flush inode %p file %p rc %d", inode, file, rc); + cifs_dbg(FYI, "Flush inode %p file %p rc %d\n", inode, file, rc); return rc; } @@ -2164,20 +2327,6 @@ size_t get_numpages(const size_t wsize, const size_t len, size_t *cur_len) } static void -cifs_uncached_marshal_iov(struct kvec *iov, struct cifs_writedata *wdata) -{ - int i; - size_t bytes = wdata->bytes; - - /* marshal up the pages into iov array */ - for (i = 0; i < wdata->nr_pages; i++) { - iov[i + 1].iov_len = min_t(size_t, bytes, PAGE_SIZE); - iov[i + 1].iov_base = kmap(wdata->pages[i]); - bytes -= iov[i + 1].iov_len; - } -} - -static void cifs_uncached_writev_complete(struct work_struct *work) { int i; @@ -2207,6 +2356,9 @@ static int cifs_uncached_retry_writev(struct cifs_writedata *wdata) { int rc; + struct TCP_Server_Info *server; + + server = tlink_tcon(wdata->cfile->tlink)->ses->server; do { if (wdata->cfile->invalidHandle) { @@ -2214,7 +2366,7 @@ cifs_uncached_retry_writev(struct cifs_writedata *wdata) if (rc != 0) continue; } - rc = cifs_async_writev(wdata); + rc = server->ops->async_writev(wdata); } while (rc == -EAGAIN); return rc; @@ -2249,6 +2401,10 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); open_file = file->private_data; tcon = tlink_tcon(open_file->tlink); + + if (!tcon->ses->server->ops->async_writev) + return -ENOSYS; + offset = *poffset; if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) @@ -2290,7 +2446,8 @@ cifs_iovec_write(struct file *file, const struct iovec *iov, wdata->cfile = cifsFileInfo_get(open_file); wdata->pid = pid; wdata->bytes = cur_len; - wdata->marshal_iov = cifs_uncached_marshal_iov; + wdata->pagesz = PAGE_SIZE; + wdata->tailsz = cur_len - ((nr_pages - 1) * PAGE_SIZE); rc = cifs_uncached_retry_writev(wdata); if (rc) { kref_put(&wdata->refcount, cifs_writedata_release); @@ -2351,7 +2508,7 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, ssize_t written; struct inode *inode; - inode = iocb->ki_filp->f_path.dentry->d_inode; + inode = file_inode(iocb->ki_filp); /* * BB - optimize the way when signing is disabled. We can drop this @@ -2368,40 +2525,99 @@ ssize_t cifs_user_writev(struct kiocb *iocb, const struct iovec *iov, return written; } -ssize_t cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +static ssize_t +cifs_writev(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct inode *inode; - - inode = iocb->ki_filp->f_path.dentry->d_inode; + struct file *file = iocb->ki_filp; + struct cifsFileInfo *cfile = (struct cifsFileInfo *)file->private_data; + struct inode *inode = file->f_mapping->host; + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct TCP_Server_Info *server = tlink_tcon(cfile->tlink)->ses->server; + ssize_t rc = -EACCES; - if (CIFS_I(inode)->clientCanCacheAll) - return generic_file_aio_write(iocb, iov, nr_segs, pos); + BUG_ON(iocb->ki_pos != pos); /* - * In strict cache mode we need to write the data to the server exactly - * from the pos to pos+len-1 rather than flush all affected pages - * because it may cause a error with mandatory locks on these pages but - * not on the region from pos to ppos+len-1. + * We need to hold the sem to be sure nobody modifies lock list + * with a brlock that prevents writing. */ + down_read(&cinode->lock_sem); + if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), + server->vals->exclusive_lock_type, NULL, + CIFS_WRITE_OP)) { + mutex_lock(&inode->i_mutex); + rc = __generic_file_aio_write(iocb, iov, nr_segs, + &iocb->ki_pos); + mutex_unlock(&inode->i_mutex); + } - return cifs_user_writev(iocb, iov, nr_segs, pos); + if (rc > 0 || rc == -EIOCBQUEUED) { + ssize_t err; + + err = generic_write_sync(file, pos, rc); + if (err < 0 && rc > 0) + rc = err; + } + + up_read(&cinode->lock_sem); + return rc; +} + +ssize_t +cifs_strict_writev(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) +{ + struct inode *inode = file_inode(iocb->ki_filp); + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsFileInfo *cfile = (struct cifsFileInfo *) + iocb->ki_filp->private_data; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + ssize_t written; + + if (cinode->clientCanCacheAll) { + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) + && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + return generic_file_aio_write(iocb, iov, nr_segs, pos); + return cifs_writev(iocb, iov, nr_segs, pos); + } + /* + * For non-oplocked files in strict cache mode we need to write the data + * to the server exactly from the pos to pos+len-1 rather than flush all + * affected pages because it may cause a error with mandatory locks on + * these pages but not on the region from pos to ppos+len-1. + */ + written = cifs_user_writev(iocb, iov, nr_segs, pos); + if (written > 0 && cinode->clientCanCacheRead) { + /* + * Windows 7 server can delay breaking level2 oplock if a write + * request comes - break it on the client to prevent reading + * an old data. + */ + cifs_invalidate_mapping(inode); + cifs_dbg(FYI, "Set no oplock for inode=%p after a write operation\n", + inode); + cinode->clientCanCacheRead = false; + } + return written; } static struct cifs_readdata * -cifs_readdata_alloc(unsigned int nr_vecs, work_func_t complete) +cifs_readdata_alloc(unsigned int nr_pages, work_func_t complete) { struct cifs_readdata *rdata; - rdata = kzalloc(sizeof(*rdata) + - sizeof(struct kvec) * nr_vecs, GFP_KERNEL); + rdata = kzalloc(sizeof(*rdata) + (sizeof(struct page *) * nr_pages), + GFP_KERNEL); if (rdata != NULL) { kref_init(&rdata->refcount); INIT_LIST_HEAD(&rdata->list); init_completion(&rdata->done); INIT_WORK(&rdata->work, complete); - INIT_LIST_HEAD(&rdata->pages); } + return rdata; } @@ -2418,25 +2634,25 @@ cifs_readdata_release(struct kref *refcount) } static int -cifs_read_allocate_pages(struct list_head *list, unsigned int npages) +cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages) { int rc = 0; - struct page *page, *tpage; + struct page *page; unsigned int i; - for (i = 0; i < npages; i++) { + for (i = 0; i < nr_pages; i++) { page = alloc_page(GFP_KERNEL|__GFP_HIGHMEM); if (!page) { rc = -ENOMEM; break; } - list_add(&page->lru, list); + rdata->pages[i] = page; } if (rc) { - list_for_each_entry_safe(page, tpage, list, lru) { - list_del(&page->lru); - put_page(page); + for (i = 0; i < nr_pages; i++) { + put_page(rdata->pages[i]); + rdata->pages[i] = NULL; } } return rc; @@ -2445,13 +2661,13 @@ cifs_read_allocate_pages(struct list_head *list, unsigned int npages) static void cifs_uncached_readdata_release(struct kref *refcount) { - struct page *page, *tpage; struct cifs_readdata *rdata = container_of(refcount, struct cifs_readdata, refcount); + unsigned int i; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - list_del(&page->lru); - put_page(page); + for (i = 0; i < rdata->nr_pages; i++) { + put_page(rdata->pages[i]); + rdata->pages[i] = NULL; } cifs_readdata_release(refcount); } @@ -2460,6 +2676,9 @@ static int cifs_retry_async_readv(struct cifs_readdata *rdata) { int rc; + struct TCP_Server_Info *server; + + server = tlink_tcon(rdata->cfile->tlink)->ses->server; do { if (rdata->cfile->invalidHandle) { @@ -2467,7 +2686,7 @@ cifs_retry_async_readv(struct cifs_readdata *rdata) if (rc != 0) continue; } - rc = cifs_async_readv(rdata); + rc = server->ops->async_readv(rdata); } while (rc == -EAGAIN); return rc; @@ -2492,17 +2711,18 @@ cifs_readdata_to_iov(struct cifs_readdata *rdata, const struct iovec *iov, int rc = 0; struct iov_iter ii; size_t pos = rdata->offset - offset; - struct page *page, *tpage; ssize_t remaining = rdata->bytes; unsigned char *pdata; + unsigned int i; /* set up iov_iter and advance to the correct offset */ iov_iter_init(&ii, iov, nr_segs, iov_length(iov, nr_segs), 0); iov_iter_advance(&ii, pos); *copied = 0; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { + for (i = 0; i < rdata->nr_pages; i++) { ssize_t copy; + struct page *page = rdata->pages[i]; /* copy a whole page or whatever's left */ copy = min_t(ssize_t, remaining, PAGE_SIZE); @@ -2522,9 +2742,6 @@ cifs_readdata_to_iov(struct cifs_readdata *rdata, const struct iovec *iov, iov_iter_advance(&ii, copy); } } - - list_del(&page->lru); - put_page(page); } return rc; @@ -2536,59 +2753,56 @@ cifs_uncached_readv_complete(struct work_struct *work) struct cifs_readdata *rdata = container_of(work, struct cifs_readdata, work); - /* if the result is non-zero then the pages weren't kmapped */ - if (rdata->result == 0) { - struct page *page; - - list_for_each_entry(page, &rdata->pages, lru) - kunmap(page); - } - complete(&rdata->done); kref_put(&rdata->refcount, cifs_uncached_readdata_release); } static int -cifs_uncached_read_marshal_iov(struct cifs_readdata *rdata, - unsigned int remaining) +cifs_uncached_read_into_pages(struct TCP_Server_Info *server, + struct cifs_readdata *rdata, unsigned int len) { - int len = 0; - struct page *page, *tpage; + int total_read = 0, result = 0; + unsigned int i; + unsigned int nr_pages = rdata->nr_pages; + struct kvec iov; - rdata->nr_iov = 1; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - if (remaining >= PAGE_SIZE) { + rdata->tailsz = PAGE_SIZE; + for (i = 0; i < nr_pages; i++) { + struct page *page = rdata->pages[i]; + + if (len >= PAGE_SIZE) { /* enough data to fill the page */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = PAGE_SIZE; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - ++rdata->nr_iov; - len += PAGE_SIZE; - remaining -= PAGE_SIZE; - } else if (remaining > 0) { + iov.iov_base = kmap(page); + iov.iov_len = PAGE_SIZE; + cifs_dbg(FYI, "%u: iov_base=%p iov_len=%zu\n", + i, iov.iov_base, iov.iov_len); + len -= PAGE_SIZE; + } else if (len > 0) { /* enough for partial page, fill and zero the rest */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = remaining; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - memset(rdata->iov[rdata->nr_iov].iov_base + remaining, - '\0', PAGE_SIZE - remaining); - ++rdata->nr_iov; - len += remaining; - remaining = 0; + iov.iov_base = kmap(page); + iov.iov_len = len; + cifs_dbg(FYI, "%u: iov_base=%p iov_len=%zu\n", + i, iov.iov_base, iov.iov_len); + memset(iov.iov_base + len, '\0', PAGE_SIZE - len); + rdata->tailsz = len; + len = 0; } else { /* no need to hold page hostage */ - list_del(&page->lru); + rdata->pages[i] = NULL; + rdata->nr_pages--; put_page(page); + continue; } + + result = cifs_readv_from_socket(server, &iov, 1, iov.iov_len); + kunmap(page); + if (result < 0) + break; + + total_read += result; } - return len; + return total_read > 0 ? total_read : result; } static ssize_t @@ -2619,13 +2833,16 @@ cifs_iovec_read(struct file *file, const struct iovec *iov, open_file = file->private_data; tcon = tlink_tcon(open_file->tlink); + if (!tcon->ses->server->ops->async_readv) + return -ENOSYS; + if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) pid = open_file->pid; else pid = current->tgid; if ((file->f_flags & O_ACCMODE) == O_WRONLY) - cFYI(1, "attempting read on write only file instance"); + cifs_dbg(FYI, "attempting read on write only file instance\n"); do { cur_len = min_t(const size_t, len - total_read, cifs_sb->rsize); @@ -2639,15 +2856,17 @@ cifs_iovec_read(struct file *file, const struct iovec *iov, goto error; } - rc = cifs_read_allocate_pages(&rdata->pages, npages); + rc = cifs_read_allocate_pages(rdata, npages); if (rc) goto error; rdata->cfile = cifsFileInfo_get(open_file); + rdata->nr_pages = npages; rdata->offset = offset; rdata->bytes = cur_len; rdata->pid = pid; - rdata->marshal_iov = cifs_uncached_read_marshal_iov; + rdata->pagesz = PAGE_SIZE; + rdata->read_into_pages = cifs_uncached_read_into_pages; rc = cifs_retry_async_readv(rdata); error: @@ -2698,6 +2917,10 @@ restart_loop: cifs_stats_bytes_read(tcon, total_read); *poffset += total_read; + /* mask nodata case */ + if (rc == -ENODATA) + rc = 0; + return total_read ? total_read : rc; } @@ -2713,15 +2936,17 @@ ssize_t cifs_user_readv(struct kiocb *iocb, const struct iovec *iov, return read; } -ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) +ssize_t +cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, + unsigned long nr_segs, loff_t pos) { - struct inode *inode; - - inode = iocb->ki_filp->f_path.dentry->d_inode; - - if (CIFS_I(inode)->clientCanCacheRead) - return generic_file_aio_read(iocb, iov, nr_segs, pos); + struct inode *inode = file_inode(iocb->ki_filp); + struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct cifsFileInfo *cfile = (struct cifsFileInfo *) + iocb->ki_filp->private_data; + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); + int rc = -EACCES; /* * In strict cache mode we need to read from the server all the time @@ -2731,12 +2956,29 @@ ssize_t cifs_strict_readv(struct kiocb *iocb, const struct iovec *iov, * on pages affected by this read but not on the region from pos to * pos+len-1. */ + if (!cinode->clientCanCacheRead) + return cifs_user_readv(iocb, iov, nr_segs, pos); + + if (cap_unix(tcon->ses) && + (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && + ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) + return generic_file_aio_read(iocb, iov, nr_segs, pos); - return cifs_user_readv(iocb, iov, nr_segs, pos); + /* + * We need to hold the sem to be sure nobody modifies lock list + * with a brlock that prevents reading. + */ + down_read(&cinode->lock_sem); + if (!cifs_find_lock_conflict(cfile, pos, iov_length(iov, nr_segs), + tcon->ses->server->vals->shared_lock_type, + NULL, CIFS_READ_OP)) + rc = generic_file_aio_read(iocb, iov, nr_segs, pos); + up_read(&cinode->lock_sem); + return rc; } -static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, - loff_t *poffset) +static ssize_t +cifs_read(struct file *file, char *read_data, size_t read_size, loff_t *offset) { int rc = -EACCES; unsigned int bytes_read = 0; @@ -2744,15 +2986,16 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, unsigned int current_read_size; unsigned int rsize; struct cifs_sb_info *cifs_sb; - struct cifs_tcon *pTcon; - int xid; - char *current_offset; + struct cifs_tcon *tcon; + struct TCP_Server_Info *server; + unsigned int xid; + char *cur_offset; struct cifsFileInfo *open_file; struct cifs_io_parms io_parms; int buf_type = CIFS_NO_BUFFER; __u32 pid; - xid = GetXid(); + xid = get_xid(); cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); /* FIXME: set up handlers for larger reads and/or convert to async */ @@ -2760,11 +3003,17 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, if (file->private_data == NULL) { rc = -EBADF; - FreeXid(xid); + free_xid(xid); return rc; } open_file = file->private_data; - pTcon = tlink_tcon(open_file->tlink); + tcon = tlink_tcon(open_file->tlink); + server = tcon->ses->server; + + if (!server->ops->sync_read) { + free_xid(xid); + return -ENOSYS; + } if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) pid = open_file->pid; @@ -2772,17 +3021,17 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, pid = current->tgid; if ((file->f_flags & O_ACCMODE) == O_WRONLY) - cFYI(1, "attempting read on write only file instance"); + cifs_dbg(FYI, "attempting read on write only file instance\n"); - for (total_read = 0, current_offset = read_data; - read_size > total_read; - total_read += bytes_read, current_offset += bytes_read) { + for (total_read = 0, cur_offset = read_data; read_size > total_read; + total_read += bytes_read, cur_offset += bytes_read) { current_read_size = min_t(uint, read_size - total_read, rsize); - - /* For windows me and 9x we do not want to request more - than it negotiated since it will refuse the read then */ - if ((pTcon->ses) && - !(pTcon->ses->capabilities & CAP_LARGE_FILES)) { + /* + * For windows me and 9x we do not want to request more than it + * negotiated since it will refuse the read then. + */ + if ((tcon->ses) && !(tcon->ses->capabilities & + tcon->ses->server->vals->cap_large_files)) { current_read_size = min_t(uint, current_read_size, CIFSMaxBufSize); } @@ -2793,27 +3042,27 @@ static ssize_t cifs_read(struct file *file, char *read_data, size_t read_size, if (rc != 0) break; } - io_parms.netfid = open_file->netfid; io_parms.pid = pid; - io_parms.tcon = pTcon; - io_parms.offset = *poffset; + io_parms.tcon = tcon; + io_parms.offset = *offset; io_parms.length = current_read_size; - rc = CIFSSMBRead(xid, &io_parms, &bytes_read, - ¤t_offset, &buf_type); + rc = server->ops->sync_read(xid, open_file, &io_parms, + &bytes_read, &cur_offset, + &buf_type); } if (rc || (bytes_read == 0)) { if (total_read) { break; } else { - FreeXid(xid); + free_xid(xid); return rc; } } else { - cifs_stats_bytes_read(pTcon, total_read); - *poffset += bytes_read; + cifs_stats_bytes_read(tcon, total_read); + *offset += bytes_read; } } - FreeXid(xid); + free_xid(xid); return total_read; } @@ -2833,14 +3082,15 @@ cifs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf) static struct vm_operations_struct cifs_file_vm_ops = { .fault = filemap_fault, .page_mkwrite = cifs_page_mkwrite, + .remap_pages = generic_file_remap_pages, }; int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) { int rc, xid; - struct inode *inode = file->f_path.dentry->d_inode; + struct inode *inode = file_inode(file); - xid = GetXid(); + xid = get_xid(); if (!CIFS_I(inode)->clientCanCacheRead) { rc = cifs_invalidate_mapping(inode); @@ -2851,7 +3101,7 @@ int cifs_file_strict_mmap(struct file *file, struct vm_area_struct *vma) rc = generic_file_mmap(file, vma); if (rc == 0) vma->vm_ops = &cifs_file_vm_ops; - FreeXid(xid); + free_xid(xid); return rc; } @@ -2859,33 +3109,34 @@ int cifs_file_mmap(struct file *file, struct vm_area_struct *vma) { int rc, xid; - xid = GetXid(); + xid = get_xid(); rc = cifs_revalidate_file(file); if (rc) { - cFYI(1, "Validation prior to mmap failed, error=%d", rc); - FreeXid(xid); + cifs_dbg(FYI, "Validation prior to mmap failed, error=%d\n", + rc); + free_xid(xid); return rc; } rc = generic_file_mmap(file, vma); if (rc == 0) vma->vm_ops = &cifs_file_vm_ops; - FreeXid(xid); + free_xid(xid); return rc; } static void cifs_readv_complete(struct work_struct *work) { + unsigned int i; struct cifs_readdata *rdata = container_of(work, struct cifs_readdata, work); - struct page *page, *tpage; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - list_del(&page->lru); + for (i = 0; i < rdata->nr_pages; i++) { + struct page *page = rdata->pages[i]; + lru_cache_add_file(page); if (rdata->result == 0) { - kunmap(page); flush_dcache_page(page); SetPageUptodate(page); } @@ -2896,49 +3147,48 @@ cifs_readv_complete(struct work_struct *work) cifs_readpage_to_fscache(rdata->mapping->host, page); page_cache_release(page); + rdata->pages[i] = NULL; } kref_put(&rdata->refcount, cifs_readdata_release); } static int -cifs_readpages_marshal_iov(struct cifs_readdata *rdata, unsigned int remaining) +cifs_readpages_read_into_pages(struct TCP_Server_Info *server, + struct cifs_readdata *rdata, unsigned int len) { - int len = 0; - struct page *page, *tpage; + int total_read = 0, result = 0; + unsigned int i; u64 eof; pgoff_t eof_index; + unsigned int nr_pages = rdata->nr_pages; + struct kvec iov; /* determine the eof that the server (probably) has */ eof = CIFS_I(rdata->mapping->host)->server_eof; eof_index = eof ? (eof - 1) >> PAGE_CACHE_SHIFT : 0; - cFYI(1, "eof=%llu eof_index=%lu", eof, eof_index); + cifs_dbg(FYI, "eof=%llu eof_index=%lu\n", eof, eof_index); + + rdata->tailsz = PAGE_CACHE_SIZE; + for (i = 0; i < nr_pages; i++) { + struct page *page = rdata->pages[i]; - rdata->nr_iov = 1; - list_for_each_entry_safe(page, tpage, &rdata->pages, lru) { - if (remaining >= PAGE_CACHE_SIZE) { + if (len >= PAGE_CACHE_SIZE) { /* enough data to fill the page */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = PAGE_CACHE_SIZE; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - ++rdata->nr_iov; - len += PAGE_CACHE_SIZE; - remaining -= PAGE_CACHE_SIZE; - } else if (remaining > 0) { + iov.iov_base = kmap(page); + iov.iov_len = PAGE_CACHE_SIZE; + cifs_dbg(FYI, "%u: idx=%lu iov_base=%p iov_len=%zu\n", + i, page->index, iov.iov_base, iov.iov_len); + len -= PAGE_CACHE_SIZE; + } else if (len > 0) { /* enough for partial page, fill and zero the rest */ - rdata->iov[rdata->nr_iov].iov_base = kmap(page); - rdata->iov[rdata->nr_iov].iov_len = remaining; - cFYI(1, "%u: idx=%lu iov_base=%p iov_len=%zu", - rdata->nr_iov, page->index, - rdata->iov[rdata->nr_iov].iov_base, - rdata->iov[rdata->nr_iov].iov_len); - memset(rdata->iov[rdata->nr_iov].iov_base + remaining, - '\0', PAGE_CACHE_SIZE - remaining); - ++rdata->nr_iov; - len += remaining; - remaining = 0; + iov.iov_base = kmap(page); + iov.iov_len = len; + cifs_dbg(FYI, "%u: idx=%lu iov_base=%p iov_len=%zu\n", + i, page->index, iov.iov_base, iov.iov_len); + memset(iov.iov_base + len, + '\0', PAGE_CACHE_SIZE - len); + rdata->tailsz = len; + len = 0; } else if (page->index > eof_index) { /* * The VFS will not try to do readahead past the @@ -2949,22 +3199,33 @@ cifs_readpages_marshal_iov(struct cifs_readdata *rdata, unsigned int remaining) * fill them until the writes are flushed. */ zero_user(page, 0, PAGE_CACHE_SIZE); - list_del(&page->lru); lru_cache_add_file(page); flush_dcache_page(page); SetPageUptodate(page); unlock_page(page); page_cache_release(page); + rdata->pages[i] = NULL; + rdata->nr_pages--; + continue; } else { /* no need to hold page hostage */ - list_del(&page->lru); lru_cache_add_file(page); unlock_page(page); page_cache_release(page); + rdata->pages[i] = NULL; + rdata->nr_pages--; + continue; } + + result = cifs_readv_from_socket(server, &iov, 1, iov.iov_len); + kunmap(page); + if (result < 0) + break; + + total_read += result; } - return len; + return total_read > 0 ? total_read : result; } static int cifs_readpages(struct file *file, struct address_space *mapping, @@ -3003,8 +3264,8 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, rc = 0; INIT_LIST_HEAD(&tmplist); - cFYI(1, "%s: file=%p mapping=%p num_pages=%u", __func__, file, - mapping, num_pages); + cifs_dbg(FYI, "%s: file=%p mapping=%p num_pages=%u\n", + __func__, file, mapping, num_pages); /* * Start with the page at end of list and move it to private @@ -3018,6 +3279,7 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, * the rdata->pages, then we want them in increasing order. */ while (!list_empty(page_list)) { + unsigned int i; unsigned int bytes = PAGE_CACHE_SIZE; unsigned int expected_index; unsigned int nr_pages = 1; @@ -3082,21 +3344,23 @@ static int cifs_readpages(struct file *file, struct address_space *mapping, break; } - spin_lock(&cifs_file_list_lock); - spin_unlock(&cifs_file_list_lock); rdata->cfile = cifsFileInfo_get(open_file); rdata->mapping = mapping; rdata->offset = offset; rdata->bytes = bytes; rdata->pid = pid; - rdata->marshal_iov = cifs_readpages_marshal_iov; - list_splice_init(&tmplist, &rdata->pages); + rdata->pagesz = PAGE_CACHE_SIZE; + rdata->read_into_pages = cifs_readpages_read_into_pages; + + list_for_each_entry_safe(page, tpage, &tmplist, lru) { + list_del(&page->lru); + rdata->pages[rdata->nr_pages++] = page; + } rc = cifs_retry_async_readv(rdata); if (rc != 0) { - list_for_each_entry_safe(page, tpage, &rdata->pages, - lru) { - list_del(&page->lru); + for (i = 0; i < rdata->nr_pages; i++) { + page = rdata->pages[i]; lru_cache_add_file(page); unlock_page(page); page_cache_release(page); @@ -3118,7 +3382,7 @@ static int cifs_readpage_worker(struct file *file, struct page *page, int rc; /* Is the page cached? */ - rc = cifs_readpage_from_fscache(file->f_path.dentry->d_inode, page); + rc = cifs_readpage_from_fscache(file_inode(file), page); if (rc == 0) goto read_complete; @@ -3131,10 +3395,10 @@ static int cifs_readpage_worker(struct file *file, struct page *page, if (rc < 0) goto io_error; else - cFYI(1, "Bytes read %d", rc); + cifs_dbg(FYI, "Bytes read %d\n", rc); - file->f_path.dentry->d_inode->i_atime = - current_fs_time(file->f_path.dentry->d_inode->i_sb); + file_inode(file)->i_atime = + current_fs_time(file_inode(file)->i_sb); if (PAGE_CACHE_SIZE > rc) memset(read_data + rc, 0, PAGE_CACHE_SIZE - rc); @@ -3143,7 +3407,7 @@ static int cifs_readpage_worker(struct file *file, struct page *page, SetPageUptodate(page); /* send this page to the cache */ - cifs_readpage_to_fscache(file->f_path.dentry->d_inode, page); + cifs_readpage_to_fscache(file_inode(file), page); rc = 0; @@ -3159,24 +3423,24 @@ static int cifs_readpage(struct file *file, struct page *page) { loff_t offset = (loff_t)page->index << PAGE_CACHE_SHIFT; int rc = -EACCES; - int xid; + unsigned int xid; - xid = GetXid(); + xid = get_xid(); if (file->private_data == NULL) { rc = -EBADF; - FreeXid(xid); + free_xid(xid); return rc; } - cFYI(1, "readpage %p at offset %d 0x%x\n", + cifs_dbg(FYI, "readpage %p at offset %d 0x%x\n", page, (int)offset, (int)offset); rc = cifs_readpage_worker(file, page, &offset); unlock_page(page); - FreeXid(xid); + free_xid(xid); return rc; } @@ -3236,7 +3500,7 @@ static int cifs_write_begin(struct file *file, struct address_space *mapping, struct page *page; int rc = 0; - cFYI(1, "write_begin from %lld len %d", (long long)pos, len); + cifs_dbg(FYI, "write_begin from %lld len %d\n", (long long)pos, len); page = grab_cache_page_write_begin(mapping, index, flags); if (!page) { @@ -3305,11 +3569,12 @@ static int cifs_release_page(struct page *page, gfp_t gfp) return cifs_fscache_release_page(page, gfp); } -static void cifs_invalidate_page(struct page *page, unsigned long offset) +static void cifs_invalidate_page(struct page *page, unsigned int offset, + unsigned int length) { struct cifsInodeInfo *cifsi = CIFS_I(page->mapping->host); - if (offset == 0) + if (offset == 0 && length == PAGE_CACHE_SIZE) cifs_fscache_invalidate_page(page, &cifsi->vfs_inode); } @@ -3325,7 +3590,7 @@ static int cifs_launder_page(struct page *page) .range_end = range_end, }; - cFYI(1, "Launder page: %p", page); + cifs_dbg(FYI, "Launder page: %p\n", page); if (clear_page_dirty_for_io(page)) rc = cifs_writepage_locked(page, &wbc); @@ -3340,8 +3605,16 @@ void cifs_oplock_break(struct work_struct *work) oplock_break); struct inode *inode = cfile->dentry->d_inode; struct cifsInodeInfo *cinode = CIFS_I(inode); + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; + if (!cinode->clientCanCacheAll && cinode->clientCanCacheRead && + cifs_has_mand_locks(cinode)) { + cifs_dbg(FYI, "Reset oplock to None for inode=%p due to mand locks\n", + inode); + cinode->clientCanCacheRead = false; + } + if (inode && S_ISREG(inode->i_mode)) { if (cinode->clientCanCacheRead) break_lease(inode, O_RDONLY); @@ -3351,14 +3624,14 @@ void cifs_oplock_break(struct work_struct *work) if (cinode->clientCanCacheRead == 0) { rc = filemap_fdatawait(inode->i_mapping); mapping_set_error(inode->i_mapping, rc); - invalidate_remote_inode(inode); + cifs_invalidate_mapping(inode); } - cFYI(1, "Oplock flush inode %p rc %d", inode, rc); + cifs_dbg(FYI, "Oplock flush inode %p rc %d\n", inode, rc); } rc = cifs_push_locks(cfile); if (rc) - cERROR(1, "Push locks rc = %d", rc); + cifs_dbg(VFS, "Push locks rc = %d\n", rc); /* * releasing stale oplock after recent reconnect of smb session using @@ -3367,11 +3640,9 @@ void cifs_oplock_break(struct work_struct *work) * disconnected since oplock already released by the server */ if (!cfile->oplock_break_cancelled) { - rc = CIFSSMBLock(0, tlink_tcon(cfile->tlink), cfile->netfid, - current->tgid, 0, 0, 0, 0, - LOCKING_ANDX_OPLOCK_RELEASE, false, - cinode->clientCanCacheRead ? 1 : 0); - cFYI(1, "Oplock release rc = %d", rc); + rc = tcon->ses->server->ops->oplock_response(tcon, &cfile->fid, + cinode); + cifs_dbg(FYI, "Oplock release rc = %d\n", rc); } } |