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Diffstat (limited to 'fs/stat.c')
-rw-r--r--fs/stat.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/fs/stat.c b/fs/stat.c
index eae494630a3..14f45459c83 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -74,7 +74,7 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
{
struct path path;
int error = -EINVAL;
- int lookup_flags = 0;
+ unsigned int lookup_flags = 0;
if ((flag & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT |
AT_EMPTY_PATH)) != 0)
@@ -84,13 +84,17 @@ int vfs_fstatat(int dfd, const char __user *filename, struct kstat *stat,
lookup_flags |= LOOKUP_FOLLOW;
if (flag & AT_EMPTY_PATH)
lookup_flags |= LOOKUP_EMPTY;
-
+retry:
error = user_path_at(dfd, filename, lookup_flags, &path);
if (error)
goto out;
error = vfs_getattr(path.mnt, path.dentry, stat);
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
out:
return error;
}
@@ -296,11 +300,13 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
struct path path;
int error;
int empty = 0;
+ unsigned int lookup_flags = LOOKUP_EMPTY;
if (bufsiz <= 0)
return -EINVAL;
- error = user_path_at_empty(dfd, pathname, LOOKUP_EMPTY, &path, &empty);
+retry:
+ error = user_path_at_empty(dfd, pathname, lookup_flags, &path, &empty);
if (!error) {
struct inode *inode = path.dentry->d_inode;
@@ -314,6 +320,10 @@ SYSCALL_DEFINE4(readlinkat, int, dfd, const char __user *, pathname,
}
}
path_put(&path);
+ if (retry_estale(error, lookup_flags)) {
+ lookup_flags |= LOOKUP_REVAL;
+ goto retry;
+ }
}
return error;
}