[PATCH v9 15/34] vfs: have chdir retry lookup and call once on ESTALE error

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/open.c | 25 +++++++++++++------------
 1 file changed, 13 insertions(+), 12 deletions(-)

diff --git a/fs/open.c b/fs/open.c
index 9cd0a50..5c2a973 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -387,20 +387,21 @@ SYSCALL_DEFINE1(chdir, const char __user *, filename)
 {
 	struct path path;
 	int error;
+	int lookup_flags = LOOKUP_FOLLOW | LOOKUP_DIRECTORY;
+	unsigned int try = 0;
 
-	error = user_path_dir(filename, &path);
-	if (error)
-		goto out;
-
-	error = inode_permission(path.dentry->d_inode, MAY_EXEC | MAY_CHDIR);
-	if (error)
-		goto dput_and_out;
-
-	set_fs_pwd(current->fs, &path);
+	do {
+		error = user_path_at(AT_FDCWD, filename, lookup_flags, &path);
+		if (error)
+			break;
 
-dput_and_out:
-	path_put(&path);
-out:
+		error = inode_permission(path.dentry->d_inode,
+					 MAY_EXEC | MAY_CHDIR);
+		if (!error)
+			set_fs_pwd(current->fs, &path);
+		path_put(&path);
+		lookup_flags |= LOOKUP_REVAL;
+	} while (retry_estale(error, try++));
 	return error;
 }
 
-- 
1.7.11.7

--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html


[Index of Archives]     [Linux Filesystem Development]     [Linux USB Development]     [Linux Media Development]     [Video for Linux]     [Linux NILFS]     [Linux Audio Users]     [Yosemite Info]     [Linux SCSI]

  Powered by Linux