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-rw-r--r--fs/cifs/inode.c419
1 files changed, 279 insertions, 140 deletions
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 46e54d39461..28a22092d45 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -737,7 +737,7 @@ psx_del_no_retry:
/* ATTRS set to normal clears r/o bit */
pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
if (!(pTcon->ses->flags & CIFS_SES_NT4))
- rc = CIFSSMBSetTimes(xid, pTcon, full_path,
+ rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
pinfo_buf,
cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
@@ -767,9 +767,10 @@ psx_del_no_retry:
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
if (rc == 0) {
- rc = CIFSSMBSetFileTimes(xid, pTcon,
- pinfo_buf,
- netfid);
+ rc = CIFSSMBSetFileInfo(xid, pTcon,
+ pinfo_buf,
+ netfid,
+ current->tgid);
CIFSSMBClose(xid, pTcon, netfid);
}
}
@@ -984,32 +985,41 @@ mkdir_get_info:
* failed to get it from the server or was set bogus */
if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
direntry->d_inode->i_nlink = 2;
+
mode &= ~current->fs->umask;
+ /* must turn on setgid bit if parent dir has it */
+ if (inode->i_mode & S_ISGID)
+ mode |= S_ISGID;
+
if (pTcon->unix_ext) {
+ struct cifs_unix_set_info_args args = {
+ .mode = mode,
+ .ctime = NO_CHANGE_64,
+ .atime = NO_CHANGE_64,
+ .mtime = NO_CHANGE_64,
+ .device = 0,
+ };
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
- CIFSSMBUnixSetPerms(xid, pTcon, full_path,
- mode,
- (__u64)current->fsuid,
- (__u64)current->fsgid,
- 0 /* dev_t */,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ args.uid = (__u64)current->fsuid;
+ if (inode->i_mode & S_ISGID)
+ args.gid = (__u64)inode->i_gid;
+ else
+ args.gid = (__u64)current->fsgid;
} else {
- CIFSSMBUnixSetPerms(xid, pTcon, full_path,
- mode, (__u64)-1,
- (__u64)-1, 0 /* dev_t */,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
+ args.uid = NO_CHANGE_64;
+ args.gid = NO_CHANGE_64;
}
+ CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
} else {
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
(mode & S_IWUGO) == 0) {
FILE_BASIC_INFO pInfo;
memset(&pInfo, 0, sizeof(pInfo));
pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
- CIFSSMBSetTimes(xid, pTcon, full_path,
+ CIFSSMBSetPathInfo(xid, pTcon, full_path,
&pInfo, cifs_sb->local_nls,
cifs_sb->mnt_cifs_flags &
CIFS_MOUNT_MAP_SPECIAL_CHR);
@@ -1024,8 +1034,12 @@ mkdir_get_info:
CIFS_MOUNT_SET_UID) {
direntry->d_inode->i_uid =
current->fsuid;
- direntry->d_inode->i_gid =
- current->fsgid;
+ if (inode->i_mode & S_ISGID)
+ direntry->d_inode->i_gid =
+ inode->i_gid;
+ else
+ direntry->d_inode->i_gid =
+ current->fsgid;
}
}
}
@@ -1310,10 +1324,11 @@ int cifs_revalidate(struct dentry *direntry)
/* if (S_ISDIR(direntry->d_inode->i_mode))
shrink_dcache_parent(direntry); */
if (S_ISREG(direntry->d_inode->i_mode)) {
- if (direntry->d_inode->i_mapping)
+ if (direntry->d_inode->i_mapping) {
wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
if (wbrc)
CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
+ }
/* may eventually have to do this for open files too */
if (list_empty(&(cifsInode->openFileList))) {
/* changed on server - flush read ahead pages */
@@ -1489,30 +1504,228 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
return rc;
}
-int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
+static int
+cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
+ char *full_path, __u32 dosattr)
+{
+ int rc;
+ int oplock = 0;
+ __u16 netfid;
+ __u32 netpid;
+ bool set_time = false;
+ struct cifsFileInfo *open_file;
+ struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsTconInfo *pTcon = cifs_sb->tcon;
+ FILE_BASIC_INFO info_buf;
+
+ if (attrs->ia_valid & ATTR_ATIME) {
+ set_time = true;
+ info_buf.LastAccessTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
+ } else
+ info_buf.LastAccessTime = 0;
+
+ if (attrs->ia_valid & ATTR_MTIME) {
+ set_time = true;
+ info_buf.LastWriteTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
+ } else
+ info_buf.LastWriteTime = 0;
+
+ /*
+ * Samba throws this field away, but windows may actually use it.
+ * Do not set ctime unless other time stamps are changed explicitly
+ * (i.e. by utimes()) since we would then have a mix of client and
+ * server times.
+ */
+ if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
+ cFYI(1, ("CIFS - CTIME changed"));
+ info_buf.ChangeTime =
+ cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
+ } else
+ info_buf.ChangeTime = 0;
+
+ info_buf.CreationTime = 0; /* don't change */
+ info_buf.Attributes = cpu_to_le32(dosattr);
+
+ /*
+ * If the file is already open for write, just use that fileid
+ */
+ open_file = find_writable_file(cifsInode);
+ if (open_file) {
+ netfid = open_file->netfid;
+ netpid = open_file->pid;
+ goto set_via_filehandle;
+ }
+
+ /*
+ * NT4 apparently returns success on this call, but it doesn't
+ * really work.
+ */
+ if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
+ rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
+ &info_buf, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+ if (rc != -EOPNOTSUPP && rc != -EINVAL)
+ goto out;
+ }
+
+ cFYI(1, ("calling SetFileInfo since SetPathInfo for "
+ "times not supported by this server"));
+ rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
+ SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
+ CREATE_NOT_DIR, &netfid, &oplock,
+ NULL, cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+ if (rc != 0) {
+ if (rc == -EIO)
+ rc = -EINVAL;
+ goto out;
+ }
+
+ netpid = current->tgid;
+
+set_via_filehandle:
+ rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
+ if (open_file == NULL)
+ CIFSSMBClose(xid, pTcon, netfid);
+ else
+ atomic_dec(&open_file->wrtPending);
+out:
+ return rc;
+}
+
+static int
+cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
{
+ int rc;
int xid;
- struct cifs_sb_info *cifs_sb;
- struct cifsTconInfo *pTcon;
char *full_path = NULL;
- int rc = -EACCES;
- FILE_BASIC_INFO time_buf;
- bool set_time = false;
- bool set_dosattr = false;
- __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
- __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
- __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
- struct cifsInodeInfo *cifsInode;
struct inode *inode = direntry->d_inode;
+ struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsTconInfo *pTcon = cifs_sb->tcon;
+ struct cifs_unix_set_info_args *args = NULL;
+
+ cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
+ direntry->d_name.name, attrs->ia_valid));
+
+ xid = GetXid();
+
+ if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
+ /* check if we have permission to change attrs */
+ rc = inode_change_ok(inode, attrs);
+ if (rc < 0)
+ goto out;
+ else
+ rc = 0;
+ }
+
+ full_path = build_path_from_dentry(direntry);
+ if (full_path == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
+ /*
+ Flush data before changing file size or changing the last
+ write time of the file on the server. If the
+ flush returns error, store it to report later and continue.
+ BB: This should be smarter. Why bother flushing pages that
+ will be truncated anyway? Also, should we error out here if
+ the flush returns error?
+ */
+ rc = filemap_write_and_wait(inode->i_mapping);
+ if (rc != 0) {
+ cifsInode->write_behind_rc = rc;
+ rc = 0;
+ }
+ }
+
+ if (attrs->ia_valid & ATTR_SIZE) {
+ rc = cifs_set_file_size(inode, attrs, xid, full_path);
+ if (rc != 0)
+ goto out;
+ }
+
+ /* skip mode change if it's just for clearing setuid/setgid */
+ if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
+ attrs->ia_valid &= ~ATTR_MODE;
+
+ args = kmalloc(sizeof(*args), GFP_KERNEL);
+ if (args == NULL) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ /* set up the struct */
+ if (attrs->ia_valid & ATTR_MODE)
+ args->mode = attrs->ia_mode;
+ else
+ args->mode = NO_CHANGE_64;
+
+ if (attrs->ia_valid & ATTR_UID)
+ args->uid = attrs->ia_uid;
+ else
+ args->uid = NO_CHANGE_64;
+
+ if (attrs->ia_valid & ATTR_GID)
+ args->gid = attrs->ia_gid;
+ else
+ args->gid = NO_CHANGE_64;
+
+ if (attrs->ia_valid & ATTR_ATIME)
+ args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
+ else
+ args->atime = NO_CHANGE_64;
+
+ if (attrs->ia_valid & ATTR_MTIME)
+ args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
+ else
+ args->mtime = NO_CHANGE_64;
+
+ if (attrs->ia_valid & ATTR_CTIME)
+ args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
+ else
+ args->ctime = NO_CHANGE_64;
+
+ args->device = 0;
+ rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
+ cifs_sb->local_nls,
+ cifs_sb->mnt_cifs_flags &
+ CIFS_MOUNT_MAP_SPECIAL_CHR);
+
+ if (!rc)
+ rc = inode_setattr(inode, attrs);
+out:
+ kfree(args);
+ kfree(full_path);
+ FreeXid(xid);
+ return rc;
+}
+
+static int
+cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
+{
+ int xid;
+ struct inode *inode = direntry->d_inode;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsInodeInfo *cifsInode = CIFS_I(inode);
+ char *full_path = NULL;
+ int rc = -EACCES;
+ __u32 dosattr = 0;
+ __u64 mode = NO_CHANGE_64;
xid = GetXid();
cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
direntry->d_name.name, attrs->ia_valid));
- cifs_sb = CIFS_SB(inode->i_sb);
- pTcon = cifs_sb->tcon;
-
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
/* check if we have permission to change attrs */
rc = inode_change_ok(inode, attrs);
@@ -1528,7 +1741,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
FreeXid(xid);
return -ENOMEM;
}
- cifsInode = CIFS_I(inode);
if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
/*
@@ -1559,21 +1771,8 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
* CIFSACL support + proper Windows to Unix idmapping, we may be
* able to support this in the future.
*/
- if (!pTcon->unix_ext &&
- !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
+ if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
- } else {
- if (attrs->ia_valid & ATTR_UID) {
- cFYI(1, ("UID changed to %d", attrs->ia_uid));
- uid = attrs->ia_uid;
- }
- if (attrs->ia_valid & ATTR_GID) {
- cFYI(1, ("GID changed to %d", attrs->ia_gid));
- gid = attrs->ia_gid;
- }
- }
-
- time_buf.Attributes = 0;
/* skip mode change if it's just for clearing setuid/setgid */
if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
@@ -1584,13 +1783,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
mode = attrs->ia_mode;
}
- if ((pTcon->unix_ext)
- && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
- rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
- 0 /* dev_t */, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- else if (attrs->ia_valid & ATTR_MODE) {
+ if (attrs->ia_valid & ATTR_MODE) {
rc = 0;
#ifdef CONFIG_CIFS_EXPERIMENTAL
if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
@@ -1599,24 +1792,19 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
#endif
if (((mode & S_IWUGO) == 0) &&
(cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
- set_dosattr = true;
- time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs |
- ATTR_READONLY);
+
+ dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
+
/* fix up mode if we're not using dynperm */
if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
attrs->ia_mode = inode->i_mode & ~S_IWUGO;
} else if ((mode & S_IWUGO) &&
(cifsInode->cifsAttrs & ATTR_READONLY)) {
- /* If file is readonly on server, we would
- not be able to write to it - so if any write
- bit is enabled for user or group or other we
- need to at least try to remove r/o dos attr */
- set_dosattr = true;
- time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
- (~ATTR_READONLY));
- /* Windows ignores set to zero */
- if (time_buf.Attributes == 0)
- time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
+
+ dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
+ /* Attributes of 0 are ignored */
+ if (dosattr == 0)
+ dosattr |= ATTR_NORMAL;
/* reset local inode permissions to normal */
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
@@ -1634,82 +1822,18 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
}
}
- if (attrs->ia_valid & ATTR_ATIME) {
- set_time = true;
- time_buf.LastAccessTime =
- cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
- } else
- time_buf.LastAccessTime = 0;
-
- if (attrs->ia_valid & ATTR_MTIME) {
- set_time = true;
- time_buf.LastWriteTime =
- cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
- } else
- time_buf.LastWriteTime = 0;
- /* Do not set ctime explicitly unless other time
- stamps are changed explicitly (i.e. by utime()
- since we would then have a mix of client and
- server times */
+ if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
+ ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
+ rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
+ /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
- if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
- set_time = true;
- /* Although Samba throws this field away
- it may be useful to Windows - but we do
- not want to set ctime unless some other
- timestamp is changing */
- cFYI(1, ("CIFS - CTIME changed"));
- time_buf.ChangeTime =
- cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
- } else
- time_buf.ChangeTime = 0;
-
- if (set_time || set_dosattr) {
- time_buf.CreationTime = 0; /* do not change */
- /* In the future we should experiment - try setting timestamps
- via Handle (SetFileInfo) instead of by path */
- if (!(pTcon->ses->flags & CIFS_SES_NT4))
- rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
- cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- else
- rc = -EOPNOTSUPP;
-
- if (rc == -EOPNOTSUPP) {
- int oplock = 0;
- __u16 netfid;
-
- cFYI(1, ("calling SetFileInfo since SetPathInfo for "
- "times not supported by this server"));
- /* BB we could scan to see if we already have it open
- and pass in pid of opener to function */
- rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
- SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
- CREATE_NOT_DIR, &netfid, &oplock,
- NULL, cifs_sb->local_nls,
- cifs_sb->mnt_cifs_flags &
- CIFS_MOUNT_MAP_SPECIAL_CHR);
- if (rc == 0) {
- rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
- netfid);
- CIFSSMBClose(xid, pTcon, netfid);
- } else {
- /* BB For even older servers we could convert time_buf
- into old DOS style which uses two second
- granularity */
-
- /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
- &time_buf, cifs_sb->local_nls); */
- }
- }
/* Even if error on time set, no sense failing the call if
the server would set the time to a reasonable value anyway,
and this check ensures that we are not being called from
sys_utimes in which case we ought to fail the call back to
the user when the server rejects the call */
if ((rc) && (attrs->ia_valid &
- (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
+ (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
rc = 0;
}
@@ -1723,6 +1847,21 @@ cifs_setattr_exit:
return rc;
}
+int
+cifs_setattr(struct dentry *direntry, struct iattr *attrs)
+{
+ struct inode *inode = direntry->d_inode;
+ struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+ struct cifsTconInfo *pTcon = cifs_sb->tcon;
+
+ if (pTcon->unix_ext)
+ return cifs_setattr_unix(direntry, attrs);
+
+ return cifs_setattr_nounix(direntry, attrs);
+
+ /* BB: add cifs_setattr_legacy for really old servers */
+}
+
#if 0
void cifs_delete_inode(struct inode *inode)
{
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-27 21:41:11 +0000