[PATCH 27/35] cifs: Move SMB1 usage of CIFSPOSIXDelFile() from inode.c to cifssmb.c

["Pali Rohár" <pali@kernel.org>]

Special case of unlinking file via SMB1 UNIX extension is currently in the
dialect agnostic function cifs_unlink() and hidden under the #ifdef
CONFIG_CIFS_ALLOW_INSECURE_LEGACY.

Cleanup the code and move this functionality into the SMB1 ->unlink()
callback, which removes one #ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
code block from inode.c

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 fs/smb/client/cifssmb.c | 12 ++++++++++++
 fs/smb/client/inode.c   | 20 +++-----------------
 2 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/fs/smb/client/cifssmb.c b/fs/smb/client/cifssmb.c
index c09713ebdc7c..3a0452479a69 100644
--- a/fs/smb/client/cifssmb.c
+++ b/fs/smb/client/cifssmb.c
@@ -768,6 +768,18 @@ CIFSSMBDelFile(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 	int name_len;
 	int remap = cifs_remap(cifs_sb);
 
+	/* If UNIX extensions are available then use UNIX UNLINK call. */
+	if (cap_unix(tcon->ses) &&
+	    (le64_to_cpu(tcon->fsUnixInfo.Capability) & CIFS_UNIX_POSIX_PATH_OPS_CAP)) {
+		rc = CIFSPOSIXDelFile(xid, tcon, name,
+				      SMB_POSIX_UNLINK_FILE_TARGET,
+				      cifs_sb->local_nls,
+				      cifs_remap(cifs_sb));
+		cifs_dbg(FYI, "posix del rc %d\n", rc);
+		if (rc == 0 || rc == -ENOENT)
+			return rc;
+	}
+
 DelFileRetry:
 	rc = smb_init(SMB_COM_DELETE, 1, tcon, (void **) &pSMB,
 		      (void **) &pSMBr);
diff --git a/fs/smb/client/inode.c b/fs/smb/client/inode.c
index c3f101d10488..545964cac9cd 100644
--- a/fs/smb/client/inode.c
+++ b/fs/smb/client/inode.c
@@ -1947,27 +1947,13 @@ int cifs_unlink(struct inode *dir, struct dentry *dentry)
 
 	netfs_wait_for_outstanding_io(inode);
 	cifs_close_deferred_file_under_dentry(tcon, full_path);
-#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY
-	if (cap_unix(tcon->ses) && (CIFS_UNIX_POSIX_PATH_OPS_CAP &
-				le64_to_cpu(tcon->fsUnixInfo.Capability))) {
-		rc = CIFSPOSIXDelFile(xid, tcon, full_path,
-			SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
-			cifs_remap(cifs_sb));
-		cifs_dbg(FYI, "posix del rc %d\n", rc);
-		if ((rc == 0) || (rc == -ENOENT))
-			goto psx_del_no_retry;
-	}
-#endif /* CONFIG_CIFS_ALLOW_INSECURE_LEGACY */
 
 retry_std_delete:
-	if (!server->ops->unlink) {
+	if (!server->ops->unlink)
 		rc = -ENOSYS;
-		goto psx_del_no_retry;
-	}
-
-	rc = server->ops->unlink(xid, tcon, full_path, cifs_sb, dentry);
+	else
+		rc = server->ops->unlink(xid, tcon, full_path, cifs_sb, dentry);
 
-psx_del_no_retry:
 	if (!rc) {
 		if (inode) {
 			cifs_mark_open_handles_for_deleted_file(inode, full_path);
-- 
2.20.1