Commit 836fb7e7 authored by Jeff Layton's avatar Jeff Layton Committed by Al Viro
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vfs: make fstatat retry on ESTALE errors from getattr call 



Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent b9d6ba94

fs/stat.c

+6 −2
Original line number Original line Diff line number Diff line
@@ -74,7 +74,7 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat, 
{

{

	struct path path;

	struct path path;

	int error = -EINVAL;

	int error = -EINVAL;

	int lookup_flags = 0;

	unsigned int lookup_flags = 0;





	if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |

	if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |

		      AT_EMPTY_PATH)) != 0)

		      AT_EMPTY_PATH)) != 0)
@@ -84,13 +84,17 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat, 
		lookup_flags |= LOOKUP_FOLLOW;

		lookup_flags |= LOOKUP_FOLLOW;

	if (flag & AT_EMPTY_PATH)

	if (flag & AT_EMPTY_PATH)

		lookup_flags |= LOOKUP_EMPTY;

		lookup_flags |= LOOKUP_EMPTY;



retry:

	error = user_path_at(dfd, filename, lookup_flags, &path);

	error = user_path_at(dfd, filename, lookup_flags, &path);

	if (error)

	if (error)

		goto out;

		goto out;





	error = vfs_getattr(path.mnt, path.dentry, stat);

	error = vfs_getattr(path.mnt, path.dentry, stat);

	path_put(&path);

	path_put(&path);

	if (retry_estale(error, lookup_flags)) {

		lookup_flags |= LOOKUP_REVAL;

		goto retry;

	}

out:

out:

	return error;

	return error;

}

}