[PATCH v7 27/49] vfs: fix symlinkat to retry on ESTALE errors

Jeff Layton
2012-10-02T00:17:45Z

fs/namei.c | 22 +++++++++++++---------
1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index dd1d519..fb9d36f 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3528,21 +3528,25 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
struct getname_info *from;
struct dentry *dentry;
struct path path;
+ unsigned int try = 0;

from = getname(oldname);
if (IS_ERR(from))
return PTR_ERR(from);

- dentry = user_path_create(newdfd, newname, &path, false, false);
- error = PTR_ERR(dentry);
- if (IS_ERR(dentry))
- goto out_putname;
+ do {
+ dentry = user_path_create(newdfd, newname, &path, false, false);
+ if (IS_ERR(dentry)) {
+ error = PTR_ERR(dentry);
+ break;
+ }

- error = security_path_symlink(&path, dentry, from->name);
- if (!error)
- error = vfs_symlink(path.dentry->d_inode, dentry, from->name);
- done_path_create(&path, dentry);
-out_putname:
+ error = security_path_symlink(&path, dentry, from->name);
+ if (!error)
+ error = vfs_symlink(path.dentry->d_inode, dentry,
+ from->name);
+ done_path_create(&path, dentry);
+ } while (retry_estale(error, try++));
putname(from);
return error;
}
--
1.7.11.4