Eventually, we'll need to track the use of tcons on a per-sb basis, so that we know when it's ok to tear them down. Begin this conversion by adding a new "tcon_link" struct and accessors that get it. For now, the core data structures are untouched -- cifs_sb still just points to a single tcon and the pointers are just cast to deal with the accessor functions. A later patch will flesh this out.
Signed-off-by: Jeff Layton <[email protected]> --- fs/cifs/cifs_dfs_ref.c | 21 ++++--- fs/cifs/cifsacl.c | 42 ++++++++++--- fs/cifs/cifsglob.h | 29 ++++++++- fs/cifs/dir.c | 65 +++++++++++++++----- fs/cifs/file.c | 9 +++- fs/cifs/inode.c | 157 +++++++++++++++++++++++++++++++++++++----------- fs/cifs/link.c | 54 +++++++++++------ fs/cifs/readdir.c | 34 ++++++----- fs/cifs/xattr.c | 60 ++++++++++++------- 9 files changed, 343 insertions(+), 128 deletions(-) diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c index f1e13ea..f4aab6f 100644 --- a/fs/cifs/cifs_dfs_ref.c +++ b/fs/cifs/cifs_dfs_ref.c @@ -306,6 +306,7 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) int xid, i; int rc = 0; struct vfsmount *mnt = ERR_PTR(-ENOENT); + struct tcon_link *tlink; cFYI(1, "in %s", __func__); BUG_ON(IS_ROOT(dentry)); @@ -315,14 +316,6 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) dput(nd->path.dentry); nd->path.dentry = dget(dentry); - cifs_sb = CIFS_SB(dentry->d_inode->i_sb); - ses = cifs_sb_tcon(cifs_sb)->ses; - - if (!ses) { - rc = -EINVAL; - goto out_err; - } - /* * The MSDFS spec states that paths in DFS referral requests and * responses must be prefixed by a single '\' character instead of @@ -335,10 +328,20 @@ cifs_dfs_follow_mountpoint(struct dentry *dentry, struct nameidata *nd) goto out_err; } - rc = get_dfs_path(xid, ses , full_path + 1, cifs_sb->local_nls, + cifs_sb = CIFS_SB(dentry->d_inode->i_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + goto out_err; + } + ses = tlink_tcon(tlink)->ses; + + rc = get_dfs_path(xid, ses, full_path + 1, cifs_sb->local_nls, &num_referrals, &referrals, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); + for (i = 0; i < num_referrals; i++) { int len; dump_referral(referrals+i); diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c index 32f2449..2647ea4 100644 --- a/fs/cifs/cifsacl.c +++ b/fs/cifs/cifsacl.c @@ -557,11 +557,16 @@ static struct cifs_ntsd *get_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, { struct cifs_ntsd *pntsd = NULL; int xid, rc; + struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); + + if (IS_ERR(tlink)) + return NULL; xid = GetXid(); - rc = CIFSSMBGetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, &pntsd, pacllen); + rc = CIFSSMBGetCIFSACL(xid, tlink_tcon(tlink), fid, &pntsd, pacllen); FreeXid(xid); + cifs_put_tlink(tlink); cFYI(1, "GetCIFSACL rc = %d ACL len %d", rc, *pacllen); return pntsd; @@ -574,10 +579,16 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, int oplock = 0; int xid, rc; __u16 fid; + struct cifsTconInfo *tcon; + struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); + + if (IS_ERR(tlink)) + return NULL; + tcon = tlink_tcon(tlink); xid = GetXid(); - rc = CIFSSMBOpen(xid, cifs_sb_tcon(cifs_sb), path, FILE_OPEN, READ_CONTROL, 0, + rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, READ_CONTROL, 0, &fid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc) { @@ -585,11 +596,12 @@ static struct cifs_ntsd *get_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, goto out; } - rc = CIFSSMBGetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, &pntsd, pacllen); + rc = CIFSSMBGetCIFSACL(xid, tcon, fid, &pntsd, pacllen); cFYI(1, "GetCIFSACL rc = %d ACL len %d", rc, *pacllen); - CIFSSMBClose(xid, cifs_sb_tcon(cifs_sb), fid); + CIFSSMBClose(xid, tcon, fid); out: + cifs_put_tlink(tlink); FreeXid(xid); return pntsd; } @@ -616,10 +628,15 @@ static int set_cifs_acl_by_fid(struct cifs_sb_info *cifs_sb, __u16 fid, struct cifs_ntsd *pnntsd, u32 acllen) { int xid, rc; + struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); + + if (IS_ERR(tlink)) + return PTR_ERR(tlink); xid = GetXid(); - rc = CIFSSMBSetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, pnntsd, acllen); + rc = CIFSSMBSetCIFSACL(xid, tlink_tcon(tlink), fid, pnntsd, acllen); FreeXid(xid); + cifs_put_tlink(tlink); cFYI(DBG2, "SetCIFSACL rc = %d", rc); return rc; @@ -631,10 +648,16 @@ static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path, int oplock = 0; int xid, rc; __u16 fid; + struct cifsTconInfo *tcon; + struct tcon_link *tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + + tcon = tlink_tcon(tlink); xid = GetXid(); - rc = CIFSSMBOpen(xid, cifs_sb_tcon(cifs_sb), path, FILE_OPEN, WRITE_DAC, 0, + rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, WRITE_DAC, 0, &fid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if (rc) { @@ -642,12 +665,13 @@ static int set_cifs_acl_by_path(struct cifs_sb_info *cifs_sb, const char *path, goto out; } - rc = CIFSSMBSetCIFSACL(xid, cifs_sb_tcon(cifs_sb), fid, pnntsd, acllen); + rc = CIFSSMBSetCIFSACL(xid, tcon, fid, pnntsd, acllen); cFYI(DBG2, "SetCIFSACL rc = %d", rc); - CIFSSMBClose(xid, cifs_sb_tcon(cifs_sb), fid); - out: + CIFSSMBClose(xid, tcon, fid); +out: FreeXid(xid); + cifs_put_tlink(tlink); return rc; } diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 2f1b008..9323587 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -308,6 +308,19 @@ struct cifsTconInfo { }; /* + * This is a refcounted and timestamped container for a tcon pointer. The + * container holds a tcon reference. It is considered safe to free one of + * these when the tl_count goes to 0. The tl_time is the time of the last + * "get" on the container. + */ +struct tcon_link { + spinlock_t tl_lock; + u32 tl_count; + u64 tl_time; + struct cifsTconInfo *tl_tcon; +}; + +/* * This info hangs off the cifsFileInfo structure, pointed to by llist. * This is used to track byte stream locks on the file */ @@ -411,10 +424,22 @@ CIFS_SB(struct super_block *sb) return sb->s_fs_info; } +static inline struct tcon_link * +cifs_sb_tlink(struct cifs_sb_info *cifs_sb) +{ + return (struct tcon_link *)cifs_sb->ptcon; +} + static inline struct cifsTconInfo * -cifs_sb_tcon(struct cifs_sb_info *cifs_sb) +tlink_tcon(struct tcon_link *tlink) { - return cifs_sb->ptcon; + return (struct cifsTconInfo *)tlink; +} + +static inline void +cifs_put_tlink(struct tcon_link *tlink) +{ + return; } /* This function is always expected to succeed */ diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c index 110c701..4675d08 100644 --- a/fs/cifs/dir.c +++ b/fs/cifs/dir.c @@ -138,7 +138,6 @@ cifs_new_fileinfo(struct inode *newinode, __u16 fileHandle, struct file *file, int oplock = 0; struct cifsFileInfo *pCifsFile; struct cifsInodeInfo *pCifsInode; - struct cifs_sb_info *cifs_sb = CIFS_SB(mnt->mnt_sb); pCifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); if (pCifsFile == NULL) @@ -195,7 +194,8 @@ int cifs_posix_open(char *full_path, struct inode **pinode, __u32 posix_flags = 0; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); struct cifs_fattr fattr; - struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink; + struct cifsTconInfo *tcon; cFYI(1, "posix open %s", full_path); @@ -230,10 +230,20 @@ int cifs_posix_open(char *full_path, struct inode **pinode, posix_flags |= SMB_O_DIRECT; mode &= ~current_umask(); + + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + goto posix_open_ret; + } + + tcon = tlink_tcon(tlink); rc = CIFSPOSIXCreate(xid, tcon, posix_flags, mode, pnetfid, presp_data, poplock, full_path, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); + if (rc) goto posix_open_ret; @@ -294,6 +304,7 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, int desiredAccess = GENERIC_READ | GENERIC_WRITE; __u16 fileHandle; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *tcon; char *full_path = NULL; FILE_ALL_INFO *buf = NULL; @@ -303,13 +314,12 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, xid = GetXid(); cifs_sb = CIFS_SB(inode->i_sb); - tcon = cifs_sb_tcon(cifs_sb); - - full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { - rc = -ENOMEM; - goto cifs_create_out; + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + FreeXid(xid); + return PTR_ERR(tlink); } + tcon = tlink_tcon(tlink); if (oplockEnabled) oplock = REQ_OPLOCK; @@ -319,6 +329,12 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode, else oflags = FMODE_READ | SMB_O_CREAT; + full_path = build_path_from_dentry(direntry); + if (full_path == NULL) { + rc = -ENOMEM; + goto cifs_create_out; + } + if (tcon->unix_ext && (tcon->ses->capabilities & CAP_UNIX) && (CIFS_UNIX_POSIX_PATH_OPS_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability))) { @@ -484,6 +500,7 @@ cifs_create_set_dentry: cifs_create_out: kfree(buf); kfree(full_path); + cifs_put_tlink(tlink); FreeXid(xid); return rc; } @@ -494,6 +511,7 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, int rc = -EPERM; int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; char *full_path = NULL; struct inode *newinode = NULL; @@ -506,10 +524,14 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, if (!old_valid_dev(device_number)) return -EINVAL; - xid = GetXid(); - cifs_sb = CIFS_SB(inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + + pTcon = tlink_tcon(tlink); + + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { @@ -609,6 +631,7 @@ mknod_out: kfree(full_path); kfree(buf); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } @@ -622,6 +645,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, __u16 fileHandle = 0; bool posix_open = false; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct cifsFileInfo *cfile; struct inode *newInode = NULL; @@ -636,7 +660,12 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, /* check whether path exists */ cifs_sb = CIFS_SB(parent_dir_inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + FreeXid(xid); + return (struct dentry *)tlink; + } + pTcon = tlink_tcon(tlink); /* * Don't allow the separator character in a path component. @@ -647,8 +676,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, for (i = 0; i < direntry->d_name.len; i++) if (direntry->d_name.name[i] == '\\') { cFYI(1, "Invalid file name"); - FreeXid(xid); - return ERR_PTR(-EINVAL); + rc = -EINVAL; + goto lookup_out; } } @@ -658,7 +687,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, */ if (nd && (nd->flags & LOOKUP_EXCL)) { d_instantiate(direntry, NULL); - return NULL; + rc = 0; + goto lookup_out; } /* can not grab the rename sem here since it would @@ -666,8 +696,8 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, in which we already have the sb rename sem */ full_path = build_path_from_dentry(direntry); if (full_path == NULL) { - FreeXid(xid); - return ERR_PTR(-ENOMEM); + rc = -ENOMEM; + goto lookup_out; } if (direntry->d_inode != NULL) { @@ -762,6 +792,7 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, lookup_out: kfree(full_path); + cifs_put_tlink(tlink); FreeXid(xid); return ERR_PTR(rc); } diff --git a/fs/cifs/file.c b/fs/cifs/file.c index a4a0134..d257206 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -224,6 +224,7 @@ int cifs_open(struct inode *inode, struct file *file) __u32 oplock; struct cifs_sb_info *cifs_sb; struct cifsTconInfo *tcon; + struct tcon_link *tlink; struct cifsFileInfo *pCifsFile = NULL; struct cifsInodeInfo *pCifsInode; char *full_path = NULL; @@ -235,7 +236,12 @@ int cifs_open(struct inode *inode, struct file *file) xid = GetXid(); cifs_sb = CIFS_SB(inode->i_sb); - tcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + FreeXid(xid); + return PTR_ERR(tlink); + } + tcon = tlink_tcon(tlink); pCifsInode = CIFS_I(file->f_path.dentry->d_inode); @@ -402,6 +408,7 @@ out: kfree(buf); kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c index 80ce0ce..fc0ae26 100644 --- a/fs/cifs/inode.c +++ b/fs/cifs/inode.c @@ -313,16 +313,21 @@ int cifs_get_inode_info_unix(struct inode **pinode, FILE_UNIX_BASIC_INFO find_data; struct cifs_fattr fattr; struct cifsTconInfo *tcon; + struct tcon_link *tlink; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - tcon = cifs_sb_tcon(cifs_sb); - cFYI(1, "Getting info on %s", full_path); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + /* could have done a find first instead but this returns more info */ rc = CIFSSMBUnixQPathInfo(xid, tcon, full_path, &find_data, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); if (!rc) { cifs_unix_basic_to_fattr(&fattr, &find_data, cifs_sb); @@ -354,7 +359,8 @@ cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, int rc; int oplock = 0; __u16 netfid; - struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink; + struct cifsTconInfo *tcon; char buf[24]; unsigned int bytes_read; char *pbuf; @@ -373,7 +379,12 @@ cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, return -EINVAL; /* EOPNOTSUPP? */ } - rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ, + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + + rc = CIFSSMBOpen(xid, tcon, path, FILE_OPEN, GENERIC_READ, CREATE_NOT_DIR, &netfid, &oplock, NULL, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & @@ -381,7 +392,7 @@ cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, if (rc == 0) { int buf_type = CIFS_NO_BUFFER; /* Read header */ - rc = CIFSSMBRead(xid, pTcon, netfid, + rc = CIFSSMBRead(xid, tcon, netfid, 24 /* length */, 0 /* offset */, &bytes_read, &pbuf, &buf_type); if ((rc == 0) && (bytes_read >= 8)) { @@ -423,8 +434,9 @@ cifs_sfu_type(struct cifs_fattr *fattr, const unsigned char *path, fattr->cf_dtype = DT_REG; rc = -EOPNOTSUPP; /* or some unknown SFU type */ } - CIFSSMBClose(xid, pTcon, netfid); + CIFSSMBClose(xid, tcon, netfid); } + cifs_put_tlink(tlink); return rc; } @@ -442,11 +454,19 @@ static int cifs_sfu_mode(struct cifs_fattr *fattr, const unsigned char *path, ssize_t rc; char ea_value[4]; __u32 mode; + struct tcon_link *tlink; + struct cifsTconInfo *tcon; - rc = CIFSSMBQAllEAs(xid, cifs_sb_tcon(cifs_sb), path, "SETFILEBITS", + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + + rc = CIFSSMBQAllEAs(xid, tcon, path, "SETFILEBITS", ea_value, 4 /* size of buf */, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); if (rc < 0) return (int)rc; else if (rc > 3) { @@ -558,26 +578,33 @@ int cifs_get_inode_info(struct inode **pinode, { int rc = 0, tmprc; struct cifsTconInfo *pTcon; + struct tcon_link *tlink; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); char *buf = NULL; bool adjustTZ = false; struct cifs_fattr fattr; - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + cFYI(1, "Getting info on %s", full_path); if ((pfindData == NULL) && (*pinode != NULL)) { if (CIFS_I(*pinode)->clientCanCacheRead) { cFYI(1, "No need to revalidate cached inode sizes"); - return rc; + goto cgii_exit; } } /* if file info not passed in then get it from server */ if (pfindData == NULL) { buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); - if (buf == NULL) - return -ENOMEM; + if (buf == NULL) { + rc = -ENOMEM; + goto cgii_exit; + } pfindData = (FILE_ALL_INFO *)buf; /* could do find first instead but this returns more info */ @@ -675,6 +702,7 @@ int cifs_get_inode_info(struct inode **pinode, cgii_exit: kfree(buf); + cifs_put_tlink(tlink); return rc; } @@ -887,6 +915,7 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, struct cifsFileInfo *open_file; struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink = NULL; struct cifsTconInfo *pTcon; FILE_BASIC_INFO info_buf; @@ -934,7 +963,13 @@ cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, goto set_via_filehandle; } - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + tlink = NULL; + goto out; + } + pTcon = tlink_tcon(tlink); /* * NT4 apparently returns success on this call, but it doesn't @@ -979,6 +1014,8 @@ set_via_filehandle: else cifsFileInfo_put(open_file); out: + if (tlink != NULL) + cifs_put_tlink(tlink); return rc; } @@ -996,10 +1033,16 @@ cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) struct inode *inode = dentry->d_inode; struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink; + struct cifsTconInfo *tcon; __u32 dosattr, origattr; FILE_BASIC_INFO *info_buf = NULL; + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, &netfid, &oplock, NULL, cifs_sb->local_nls, @@ -1068,6 +1111,7 @@ out_close: CIFSSMBClose(xid, tcon, netfid); out: kfree(info_buf); + cifs_put_tlink(tlink); return rc; /* @@ -1107,12 +1151,18 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) struct cifsInodeInfo *cifs_inode; struct super_block *sb = dir->i_sb; struct cifs_sb_info *cifs_sb = CIFS_SB(sb); - struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink; + struct cifsTconInfo *tcon; struct iattr *attrs = NULL; __u32 dosattr = 0, origattr = 0; cFYI(1, "cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); + xid = GetXid(); /* Unlink can be called from rename so we can not take the @@ -1120,8 +1170,7 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry) full_path = build_path_from_dentry(dentry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto unlink_out; } if ((tcon->ses->capabilities & CAP_UNIX) && @@ -1187,10 +1236,11 @@ out_reval: dir->i_ctime = dir->i_mtime = current_fs_time(sb); cifs_inode = CIFS_I(dir); CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ - +unlink_out: kfree(full_path); kfree(attrs); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } @@ -1199,6 +1249,7 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) int rc = 0, tmprc; int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; char *full_path = NULL; struct inode *newinode = NULL; @@ -1206,16 +1257,18 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) cFYI(1, "In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode); - xid = GetXid(); - cifs_sb = CIFS_SB(inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto mkdir_out; } if ((pTcon->ses->capabilities & CAP_UNIX) && @@ -1373,6 +1426,7 @@ mkdir_get_info: mkdir_out: kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } @@ -1381,6 +1435,7 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry) int rc = 0; int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; char *full_path = NULL; struct cifsInodeInfo *cifsInode; @@ -1389,18 +1444,23 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry) xid = GetXid(); - cifs_sb = CIFS_SB(inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb); - full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto rmdir_exit; + } + + cifs_sb = CIFS_SB(inode->i_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + goto rmdir_exit; } + pTcon = tlink_tcon(tlink); rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); if (!rc) { drop_nlink(inode); @@ -1421,6 +1481,7 @@ int cifs_rmdir(struct inode *inode, struct dentry *direntry) direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb); +rmdir_exit: kfree(full_path); FreeXid(xid); return rc; @@ -1431,10 +1492,16 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, struct dentry *to_dentry, const char *toPath) { struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); - struct cifsTconInfo *pTcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink; + struct cifsTconInfo *pTcon; __u16 srcfid; int oplock, rc; + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + /* try path-based rename first */ rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & @@ -1446,11 +1513,11 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, * rename by filehandle to various Windows servers. */ if (rc == 0 || rc != -ETXTBSY) - return rc; + goto do_rename_exit; /* open-file renames don't work across directories */ if (to_dentry->d_parent != from_dentry->d_parent) - return rc; + goto do_rename_exit; /* open the file to be renamed -- we need DELETE perms */ rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, @@ -1466,7 +1533,8 @@ cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, CIFSSMBClose(xid, pTcon, srcfid); } - +do_rename_exit: + cifs_put_tlink(tlink); return rc; } @@ -1476,13 +1544,17 @@ int cifs_rename(struct inode *source_dir, struct dentry *source_dentry, char *fromName = NULL; char *toName = NULL; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *tcon; FILE_UNIX_BASIC_INFO *info_buf_source = NULL; FILE_UNIX_BASIC_INFO *info_buf_target; int xid, rc, tmprc; cifs_sb = CIFS_SB(source_dir->i_sb); - tcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + tcon = tlink_tcon(tlink); xid = GetXid(); @@ -1558,6 +1630,7 @@ cifs_rename_exit: kfree(fromName); kfree(toName); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } @@ -1720,6 +1793,7 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, struct cifsFileInfo *open_file; struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink = NULL; struct cifsTconInfo *pTcon = NULL; /* @@ -1750,8 +1824,12 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, rc = -EINVAL; if (rc != 0) { - if (pTcon == NULL) - pTcon = cifs_sb_tcon(cifs_sb); + if (pTcon == NULL) { + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + } /* Set file size by pathname rather than by handle either because no valid, writeable file handle for @@ -1782,6 +1860,8 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs, CIFSSMBClose(xid, pTcon, netfid); } } + if (tlink) + cifs_put_tlink(tlink); } if (rc == 0) { @@ -1802,6 +1882,7 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) struct inode *inode = direntry->d_inode; struct cifsInodeInfo *cifsInode = CIFS_I(inode); struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct cifs_unix_set_info_args *args = NULL; struct cifsFileInfo *open_file; @@ -1897,11 +1978,17 @@ cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) rc = CIFSSMBUnixSetFileInfo(xid, pTcon, args, nfid, npid); cifsFileInfo_put(open_file); } else { - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + goto out; + } + pTcon = tlink_tcon(tlink); rc = CIFSSMBUnixSetPathInfo(xid, pTcon, full_path, args, cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); + cifs_put_tlink(tlink); } if (rc) diff --git a/fs/cifs/link.c b/fs/cifs/link.c index 1ceeb8c..48de03c 100644 --- a/fs/cifs/link.c +++ b/fs/cifs/link.c @@ -37,17 +37,17 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode, int xid; char *fromName = NULL; char *toName = NULL; - struct cifs_sb_info *cifs_sb_target; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct cifsInodeInfo *cifsInode; - xid = GetXid(); - - cifs_sb_target = CIFS_SB(inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb_target); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); -/* No need to check for cross device links since server will do that - BB note DFS case in future though (when we may have to check) */ + xid = GetXid(); fromName = build_path_from_dentry(old_file); toName = build_path_from_dentry(direntry); @@ -59,13 +59,13 @@ cifs_hardlink(struct dentry *old_file, struct inode *inode, /* if (cifs_sb_target->tcon->ses->capabilities & CAP_UNIX)*/ if (pTcon->unix_ext) rc = CIFSUnixCreateHardLink(xid, pTcon, fromName, toName, - cifs_sb_target->local_nls, - cifs_sb_target->mnt_cifs_flags & + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); else { rc = CIFSCreateHardLink(xid, pTcon, fromName, toName, - cifs_sb_target->local_nls, - cifs_sb_target->mnt_cifs_flags & + cifs_sb->local_nls, + cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); if ((rc == -EIO) || (rc == -EINVAL)) rc = -EOPNOTSUPP; @@ -101,6 +101,7 @@ cifs_hl_exit: kfree(fromName); kfree(toName); FreeXid(xid); + cifs_put_tlink(tlink); return rc; } @@ -113,10 +114,19 @@ cifs_follow_link(struct dentry *direntry, struct nameidata *nd) char *full_path = NULL; char *target_path = NULL; struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); - struct cifsTconInfo *tcon = cifs_sb_tcon(cifs_sb); + struct tcon_link *tlink = NULL; + struct cifsTconInfo *tcon; xid = GetXid(); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + tlink = NULL; + goto out; + } + tcon = tlink_tcon(tlink); + /* * For now, we just handle symlinks with unix extensions enabled. * Eventually we should handle NTFS reparse points, and MacOS @@ -151,6 +161,8 @@ out: } FreeXid(xid); + if (tlink) + cifs_put_tlink(tlink); nd_set_link(nd, target_path); return NULL; } @@ -160,22 +172,25 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) { int rc = -EOPNOTSUPP; int xid; - struct cifs_sb_info *cifs_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); + struct tcon_link *tlink; struct cifsTconInfo *pTcon; char *full_path = NULL; struct inode *newinode = NULL; xid = GetXid(); - cifs_sb = CIFS_SB(inode->i_sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) { + rc = PTR_ERR(tlink); + goto symlink_exit; + } + pTcon = tlink_tcon(tlink); full_path = build_path_from_dentry(direntry); - if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto symlink_exit; } cFYI(1, "Full path: %s", full_path); @@ -208,8 +223,9 @@ cifs_symlink(struct inode *inode, struct dentry *direntry, const char *symname) d_instantiate(direntry, newinode); } } - +symlink_exit: kfree(full_path); + cifs_put_tlink(tlink); FreeXid(xid); return rc; } diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c index 0992115..42b11ef 100644 --- a/fs/cifs/readdir.c +++ b/fs/cifs/readdir.c @@ -224,33 +224,35 @@ int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb, static int initiate_cifs_search(const int xid, struct file *file) { int rc = 0; - char *full_path; + char *full_path = NULL; struct cifsFileInfo *cifsFile; - struct cifs_sb_info *cifs_sb; + struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); + struct tcon_link *tlink; struct cifsTconInfo *pTcon; - cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); - if (cifs_sb == NULL) - return -EINVAL; - + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + if (file->private_data == NULL) file->private_data = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); + if (file->private_data == NULL) { + rc = -ENOMEM; + goto error_exit; + } - if (file->private_data == NULL) - return -ENOMEM; cifsFile = file->private_data; cifsFile->invalidHandle = true; cifsFile->srch_inf.endOfSearch = false; - cifsFile->tcon = cifs_sb_tcon(cifs_sb); - pTcon = cifsFile->tcon; - if (pTcon == NULL) - return -EINVAL; + cifsFile->tcon = pTcon; full_path = build_path_from_dentry(file->f_path.dentry); - - if (full_path == NULL) - return -ENOMEM; + if (full_path == NULL) { + rc = -ENOMEM; + goto error_exit; + } cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos); @@ -283,7 +285,9 @@ ffirst_retry: cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; goto ffirst_retry; } +error_exit: kfree(full_path); + cifs_put_tlink(tlink); return rc; } diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c index 41f95bf..a264b74 100644 --- a/fs/cifs/xattr.c +++ b/fs/cifs/xattr.c @@ -47,9 +47,10 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name) #ifdef CONFIG_CIFS_XATTR int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct super_block *sb; - char *full_path; + char *full_path = NULL; if (direntry == NULL) return -EIO; @@ -58,16 +59,19 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name) sb = direntry->d_inode->i_sb; if (sb == NULL) return -EIO; - xid = GetXid(); cifs_sb = CIFS_SB(sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto remove_ea_exit; } if (ea_name == NULL) { cFYI(1, "Null xattr names not supported"); @@ -91,6 +95,7 @@ int cifs_removexattr(struct dentry *direntry, const char *ea_name) remove_ea_exit: kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); #endif return rc; } @@ -102,6 +107,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, #ifdef CONFIG_CIFS_XATTR int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct super_block *sb; char *full_path; @@ -113,16 +119,19 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, sb = direntry->d_inode->i_sb; if (sb == NULL) return -EIO; - xid = GetXid(); cifs_sb = CIFS_SB(sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto set_ea_exit; } /* return dos attributes as pseudo xattr */ /* return alt name if available as pseudo attr */ @@ -132,9 +141,8 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, returns as xattrs */ if (value_size > MAX_EA_VALUE_SIZE) { cFYI(1, "size of EA value too large"); - kfree(full_path); - FreeXid(xid); - return -EOPNOTSUPP; + rc = -EOPNOTSUPP; + goto set_ea_exit; } if (ea_name == NULL) { @@ -198,6 +206,7 @@ int cifs_setxattr(struct dentry *direntry, const char *ea_name, set_ea_exit: kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); #endif return rc; } @@ -209,6 +218,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, #ifdef CONFIG_CIFS_XATTR int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct super_block *sb; char *full_path; @@ -221,16 +231,18 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, if (sb == NULL) return -EIO; - xid = GetXid(); - cifs_sb = CIFS_SB(sb); - pTcon = cifs_sb_tcon(cifs_sb); + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto get_ea_exit; } /* return dos attributes as pseudo xattr */ /* return alt name if available as pseudo attr */ @@ -323,6 +335,7 @@ ssize_t cifs_getxattr(struct dentry *direntry, const char *ea_name, get_ea_exit: kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); #endif return rc; } @@ -333,6 +346,7 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) #ifdef CONFIG_CIFS_XATTR int xid; struct cifs_sb_info *cifs_sb; + struct tcon_link *tlink; struct cifsTconInfo *pTcon; struct super_block *sb; char *full_path; @@ -346,18 +360,20 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) return -EIO; cifs_sb = CIFS_SB(sb); - pTcon = cifs_sb_tcon(cifs_sb); - if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) return -EOPNOTSUPP; + tlink = cifs_sb_tlink(cifs_sb); + if (IS_ERR(tlink)) + return PTR_ERR(tlink); + pTcon = tlink_tcon(tlink); + xid = GetXid(); full_path = build_path_from_dentry(direntry); if (full_path == NULL) { rc = -ENOMEM; - FreeXid(xid); - return rc; + goto list_ea_exit; } /* return dos attributes as pseudo xattr */ /* return alt name if available as pseudo attr */ @@ -370,8 +386,10 @@ ssize_t cifs_listxattr(struct dentry *direntry, char *data, size_t buf_size) cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); +list_ea_exit: kfree(full_path); FreeXid(xid); + cifs_put_tlink(tlink); #endif return rc; } -- 1.7.2.1 -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
