[PATCH v7 26/49] vfs: fix mkdir to retry on ESTALE errors

Jeff Layton
2012-10-02T00:17:43Z

fs/namei.c | 21 ++++++++++++---------
1 file changed, 12 insertions(+), 9 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index ac62973..dd1d519 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3253,17 +3253,20 @@ SYSCALL_DEFINE3(mkdirat, int, dfd, const char __user *, pathname, umode_t, mode)
struct dentry *dentry;
struct path path;
int error;
+ unsigned int try = 0;

- dentry = user_path_create(dfd, pathname, &path, true, false);
- if (IS_ERR(dentry))
- return PTR_ERR(dentry);
+ do {
+ dentry = user_path_create(dfd, pathname, &path, true, false);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);

- if (!IS_POSIXACL(path.dentry->d_inode))
- mode &= ~current_umask();
- error = security_path_mkdir(&path, dentry, mode);
- if (!error)
- error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
- done_path_create(&path, dentry);
+ if (!IS_POSIXACL(path.dentry->d_inode))
+ mode &= ~current_umask();
+ error = security_path_mkdir(&path, dentry, mode);
+ if (!error)
+ error = vfs_mkdir(path.dentry->d_inode, dentry, mode);
+ done_path_create(&path, dentry);
+ } while (retry_estale(error, try++));
return error;
}

--
1.7.11.4