forked from Minki/linux
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
parent
3fe5c1dd0a
commit
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,
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return rc;
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}
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static int
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cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
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char *full_path, __u32 dosattr)
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{
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int rc;
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int oplock = 0;
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__u16 netfid;
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__u32 netpid;
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bool set_time = false;
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struct cifsFileInfo *open_file;
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struct cifsInodeInfo *cifsInode = CIFS_I(inode);
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struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
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struct cifsTconInfo *pTcon = cifs_sb->tcon;
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FILE_BASIC_INFO info_buf;
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if (attrs->ia_valid & ATTR_ATIME) {
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set_time = true;
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info_buf.LastAccessTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
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} else
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info_buf.LastAccessTime = 0;
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if (attrs->ia_valid & ATTR_MTIME) {
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set_time = true;
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info_buf.LastWriteTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
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} else
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info_buf.LastWriteTime = 0;
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/*
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* Samba throws this field away, but windows may actually use it.
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* Do not set ctime unless other time stamps are changed explicitly
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* (i.e. by utimes()) since we would then have a mix of client and
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* server times.
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*/
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if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
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cFYI(1, ("CIFS - CTIME changed"));
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info_buf.ChangeTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
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} else
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info_buf.ChangeTime = 0;
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info_buf.CreationTime = 0; /* don't change */
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info_buf.Attributes = cpu_to_le32(dosattr);
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/*
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* If the file is already open for write, just use that fileid
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*/
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open_file = find_writable_file(cifsInode);
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if (open_file) {
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netfid = open_file->netfid;
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netpid = open_file->pid;
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goto set_via_filehandle;
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}
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/*
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* NT4 apparently returns success on this call, but it doesn't
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* really work.
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*/
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if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
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rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
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&info_buf, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc != -EOPNOTSUPP && rc != -EINVAL)
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goto out;
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}
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cFYI(1, ("calling SetFileInfo since SetPathInfo for "
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"times not supported by this server"));
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rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
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SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
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CREATE_NOT_DIR, &netfid, &oplock,
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NULL, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc != 0) {
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if (rc == -EIO)
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rc = -EINVAL;
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goto out;
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}
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netpid = current->tgid;
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set_via_filehandle:
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rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
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if (open_file == NULL)
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CIFSSMBClose(xid, pTcon, netfid);
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else
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atomic_dec(&open_file->wrtPending);
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out:
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return rc;
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}
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static int
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cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
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{
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@ -1623,9 +1718,7 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
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struct cifsInodeInfo *cifsInode = CIFS_I(inode);
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char *full_path = NULL;
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int rc = -EACCES;
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FILE_BASIC_INFO time_buf;
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bool set_time = false;
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bool set_dosattr = false;
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__u32 dosattr = 0;
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__u64 mode = NO_CHANGE_64;
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if (pTcon->unix_ext)
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@ -1684,8 +1777,6 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
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if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
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attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
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time_buf.Attributes = 0;
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/* skip mode change if it's just for clearing setuid/setgid */
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if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
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attrs->ia_valid &= ~ATTR_MODE;
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@ -1704,24 +1795,19 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
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#endif
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if (((mode & S_IWUGO) == 0) &&
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(cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
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set_dosattr = true;
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time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs |
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ATTR_READONLY);
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dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
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/* fix up mode if we're not using dynperm */
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if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
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attrs->ia_mode = inode->i_mode & ~S_IWUGO;
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} else if ((mode & S_IWUGO) &&
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(cifsInode->cifsAttrs & ATTR_READONLY)) {
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/* If file is readonly on server, we would
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not be able to write to it - so if any write
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bit is enabled for user or group or other we
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need to at least try to remove r/o dos attr */
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set_dosattr = true;
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time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
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(~ATTR_READONLY));
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/* Windows ignores set to zero */
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if (time_buf.Attributes == 0)
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time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
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dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
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/* Attributes of 0 are ignored */
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if (dosattr == 0)
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dosattr |= ATTR_NORMAL;
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/* reset local inode permissions to normal */
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if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
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@ -1739,82 +1825,18 @@ int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
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}
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}
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if (attrs->ia_valid & ATTR_ATIME) {
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set_time = true;
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time_buf.LastAccessTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
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} else
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time_buf.LastAccessTime = 0;
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if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
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((attrs->ia_valid & ATTR_MODE) && dosattr)) {
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rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
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/* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
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if (attrs->ia_valid & ATTR_MTIME) {
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set_time = true;
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time_buf.LastWriteTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
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} else
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time_buf.LastWriteTime = 0;
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/* Do not set ctime explicitly unless other time
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stamps are changed explicitly (i.e. by utime()
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since we would then have a mix of client and
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server times */
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if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
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set_time = true;
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/* Although Samba throws this field away
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it may be useful to Windows - but we do
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not want to set ctime unless some other
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timestamp is changing */
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cFYI(1, ("CIFS - CTIME changed"));
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time_buf.ChangeTime =
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cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
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} else
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time_buf.ChangeTime = 0;
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if (set_time || set_dosattr) {
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time_buf.CreationTime = 0; /* do not change */
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/* In the future we should experiment - try setting timestamps
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via Handle (SetFileInfo) instead of by path */
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if (!(pTcon->ses->flags & CIFS_SES_NT4))
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rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
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&time_buf, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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else
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rc = -EOPNOTSUPP;
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if (rc == -EOPNOTSUPP) {
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int oplock = 0;
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__u16 netfid;
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cFYI(1, ("calling SetFileInfo since SetPathInfo for "
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"times not supported by this server"));
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/* BB we could scan to see if we already have it open
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and pass in pid of opener to function */
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rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
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SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
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CREATE_NOT_DIR, &netfid, &oplock,
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NULL, cifs_sb->local_nls,
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cifs_sb->mnt_cifs_flags &
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CIFS_MOUNT_MAP_SPECIAL_CHR);
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if (rc == 0) {
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rc = CIFSSMBSetFileInfo(xid, pTcon, &time_buf,
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netfid, current->tgid);
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CIFSSMBClose(xid, pTcon, netfid);
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} else {
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/* BB For even older servers we could convert time_buf
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into old DOS style which uses two second
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granularity */
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/* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
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&time_buf, cifs_sb->local_nls); */
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}
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}
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/* Even if error on time set, no sense failing the call if
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the server would set the time to a reasonable value anyway,
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and this check ensures that we are not being called from
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sys_utimes in which case we ought to fail the call back to
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the user when the server rejects the call */
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if ((rc) && (attrs->ia_valid &
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(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
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(ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
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rc = 0;
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}
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