Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
fs/namei.c | 9 +++++++--
1 files changed, 7 insertions(+), 2 deletions(-)
diff --git a/fs/namei.c b/fs/namei.c
index b189dc5..0d54eb3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3054,6 +3054,7 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
struct path old_path, new_path;
int how = 0;
int error;
+ unsigned int try = 0;
if ((flags & ~(AT_SYMLINK_FOLLOW | AT_EMPTY_PATH)) != 0)
return -EINVAL;
@@ -3071,11 +3072,12 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
if (flags & AT_SYMLINK_FOLLOW)
how |= LOOKUP_FOLLOW;
+retry:
error = user_path_at(olddfd, oldname, how, &old_path);
if (error)
return error;
- new_dentry = user_path_create(newdfd, newname, &new_path, false, false);
+ new_dentry = user_path_create(newdfd, newname, &new_path, false, try);
error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry))
goto out;
@@ -3098,7 +3100,10 @@ out_dput:
path_put(&new_path);
out:
path_put(&old_path);
-
+ if (retry_estale(error, try++)) {
+ how |= LOOKUP_REVAL;
+ goto retry;
+ }
return error;
}
--
1.7.7.6
--
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