[CIFS] use common code for turning off ATTR_READONLY in cifs_unlink
We already have a cifs_set_file_info function that can flip DOS attribute bits. Have cifs_unlink call it to handle turning ATTR_HIDDEN on and ATTR_READONLY off when an unlink attempt returns -EACCES. This also removes a level of indentation from cifs_unlink. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
5f0319a790
commit
388e57b275
1 changed files with 139 additions and 167 deletions
306
fs/cifs/inode.c
306
fs/cifs/inode.c
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@ -665,6 +665,101 @@ struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
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return inode;
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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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int cifs_unlink(struct inode *dir, struct dentry *dentry)
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{
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int rc = 0;
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@ -675,7 +770,8 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry)
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struct super_block *sb = dir->i_sb;
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struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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struct cifsTconInfo *tcon = cifs_sb->tcon;
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FILE_BASIC_INFO *pinfo_buf;
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struct iattr *attrs;
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__u32 dosattr;
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cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry));
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@ -728,84 +824,55 @@ psx_del_no_retry:
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}
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} else if (rc == -EACCES) {
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/* try only if r/o attribute set in local lookup data? */
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pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
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if (pinfo_buf) {
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/* ATTRS set to normal clears r/o bit */
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pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
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if (!(tcon->ses->flags & CIFS_SES_NT4))
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rc = CIFSSMBSetPathInfo(xid, tcon, full_path,
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pinfo_buf,
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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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/* rc = CIFSSMBSetAttrLegacy(xid, tcon,
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full_path,
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(__u16)ATTR_NORMAL,
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cifs_sb->local_nls);
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For some strange reason it seems that NT4 eats the
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old setattr call without actually setting the
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attributes so on to the third attempted workaround
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*/
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/* BB 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, tcon, full_path,
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FILE_OPEN, SYNCHRONIZE |
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FILE_WRITE_ATTRIBUTES, 0,
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&netfid, &oplock, NULL,
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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, tcon,
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pinfo_buf,
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netfid,
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current->tgid);
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CIFSSMBClose(xid, tcon, netfid);
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}
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}
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kfree(pinfo_buf);
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attrs = kzalloc(sizeof(*attrs), GFP_KERNEL);
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if (attrs == NULL) {
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rc = -ENOMEM;
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goto out_reval;
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}
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/* try to reset dos attributes */
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cifsInode = CIFS_I(inode);
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dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
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if (dosattr == 0)
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dosattr |= ATTR_NORMAL;
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dosattr |= ATTR_HIDDEN;
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rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
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kfree(attrs);
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if (rc != 0)
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goto out_reval;
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rc = CIFSSMBDelFile(xid, tcon, full_path, 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 = CIFSSMBDelFile(xid, tcon, full_path,
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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) {
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if (inode)
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drop_nlink(inode);
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} else if (rc == -ETXTBSY) {
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int oplock = 0;
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__u16 netfid;
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rc = CIFSSMBOpen(xid, tcon, full_path,
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FILE_OPEN, DELETE,
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CREATE_NOT_DIR |
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CREATE_DELETE_ON_CLOSE,
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&netfid, &oplock, NULL,
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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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CIFSSMBRenameOpenFile(xid, tcon,
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netfid, NULL,
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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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CIFSSMBClose(xid, tcon, netfid);
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if (inode)
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drop_nlink(inode);
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} else if (rc == -ETXTBSY) {
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int oplock = 0;
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__u16 netfid;
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rc = CIFSSMBOpen(xid, tcon, full_path,
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FILE_OPEN, DELETE,
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CREATE_NOT_DIR |
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CREATE_DELETE_ON_CLOSE,
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&netfid, &oplock, NULL,
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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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CIFSSMBRenameOpenFile(xid, tcon,
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netfid, NULL,
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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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CIFSSMBClose(xid, tcon, netfid);
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if (inode)
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drop_nlink(inode);
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}
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/* BB if rc = -ETXTBUSY goto the rename logic BB */
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}
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/* BB if rc = -ETXTBUSY goto the rename logic BB */
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}
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}
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out_reval:
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if (inode) {
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cifsInode = CIFS_I(inode);
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cifsInode->time = 0; /* will force revalidate to get info
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@ -1498,101 +1565,6 @@ 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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