[CIFS] report rename failure when target file is locked by Windows

Fixes Samba bugzilla bug # 4182

Rename by handle failures (retry after rename by path) were not
being returned back.

Signed-off-by: Steve French <sfrench@us.ibm.com>

2 files changed, 12 insertions, 6 deletions

diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES
index 50afab81a59..0b3c37ef52e 100644
--- a/fs/cifs/CHANGES
+++ b/fs/cifs/CHANGES
@@ -3,7 +3,9 @@ Version 1.46
 Support deep tree mounts.  Better support OS/2, Win9x (DOS) time stamps.
 Allow null user to be specified on mount ("username="). Do not return
 EINVAL on readdir when filldir fails due to overwritten blocksize
-(fixes FC problem)
+(fixes FC problem).  Return error in rename 2nd attempt retry (ie report
+if rename by handle also fails, after rename by path fails, we were
+not reporting whether the retry worked or not).
 
 Version 1.45
 ------------
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 35d54bb0869..dffe295825f 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -885,10 +885,14 @@ int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
                 if (info_buf_source != NULL) {
                         info_buf_target = info_buf_source + 1;
-                        rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
-                                info_buf_source, cifs_sb_source->local_nls, 
-                                cifs_sb_source->mnt_cifs_flags &
-                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+                        if (pTcon->ses->capabilities & CAP_UNIX)
+                                rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
+                                        info_buf_source, 
+                                        cifs_sb_source->local_nls,
+                                        cifs_sb_source->mnt_cifs_flags &
+                                                CIFS_MOUNT_MAP_SPECIAL_CHR);
+                        /* else rc is still EEXIST so will fall through to
+                           unlink the target and retry rename */
                         if (rc == 0) {
                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
                                                 info_buf_target,
@@ -937,7 +941,7 @@ int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
                                  cifs_sb_source->mnt_cifs_flags & 
                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
                 if (rc==0) {
-                        CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
+                        rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
                                               cifs_sb_source->local_nls, 
                                               cifs_sb_source->mnt_cifs_flags &
                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);