move file time and dos attribute setting logic into new function
Break up cifs_setattr further by moving the logic that sets file times and dos attributes into a separate function. This patch also refactors the logic a bit so that when the file is already open then we go ahead and do a SetFileInfo call. SetPathInfo seems to be unreliable when setting times on open files. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Jeff Layton
Steve French
Родитель
3fe5c1dd0a
Коммит
feb3e20cee
196
fs/cifs/inode.c
196
fs/cifs/inode.c
|
|
@ -1504,6 +1504,101 @@ cifs_set_file_size(struct inode *inode, struct iattr *attrs,
|
|||
return rc;
|
||||
}
|
||||
|
||||
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)
|
||||
{
|
||||
|
|
@ -1623,9 +1718,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
|
|||
struct cifsInodeInfo *cifsInode = CIFS_I(inode);
|
||||
char *full_path = NULL;
|
||||
int rc = -EACCES;
|
||||
FILE_BASIC_INFO time_buf;
|
||||
bool set_time = false;
|
||||
bool set_dosattr = false;
|
||||
__u32 dosattr = 0;
|
||||
__u64 mode = NO_CHANGE_64;
|
||||
|
||||
if (pTcon->unix_ext)
|
||||
|
|
@ -1684,8 +1777,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
|
|||
if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
|
||||
attrs->ia_valid &= ~(ATTR_UID | ATTR_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))
|
||||
attrs->ia_valid &= ~ATTR_MODE;
|
||||
|
|
@ -1704,24 +1795,19 @@ 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)) {
|
||||
|
|
@ -1739,82 +1825,18 @@ 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|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 (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 (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 = CIFSSMBSetPathInfo(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 = CIFSSMBSetFileInfo(xid, pTcon, &time_buf,
|
||||
netfid, current->tgid);
|
||||
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;
|
||||
}
|
||||
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче