[v8,06/32] vfs: fix mkdir to retry on ESTALE errors

Commit Message

Jeff Layton Oct. 27, 2012, 12:33 p.m. UTC

Signed-off-by: Jeff Layton <[e-mail]>
---
 fs/namei.c | 21 ++++++++++++---------
 1 file changed, 12 insertions(+), 9 deletions(-)

Patch

diff --git a/fs/namei.c b/fs/namei.c
index 7b0ca39..6e8db3d 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3250,17 +3250,20 @@  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;
 }