UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

vfs: fix linkat to retry once on ESTALE errors 

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton 2012-12-20 16:15:38 -05:00 committed by Al Viro
parent f46d3567b2
commit 442e31ca5a
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
fs/namei.c
View File

@ -3626,12 +3626,13 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
if (flags & AT_SYMLINK_FOLLOW) if (flags & AT_SYMLINK_FOLLOW)
how |= LOOKUP_FOLLOW; how |= LOOKUP_FOLLOW;
retry:
error = user_path_at(olddfd, oldname, how, &old_path); error = user_path_at(olddfd, oldname, how, &old_path);
if (error) if (error)
return error; return error;
new_dentry = user_path_create(newdfd, newname, &new_path, 0); new_dentry = user_path_create(newdfd, newname, &new_path,
(how & LOOKUP_REVAL));
error = PTR_ERR(new_dentry); error = PTR_ERR(new_dentry);
if (IS_ERR(new_dentry)) if (IS_ERR(new_dentry))
goto out; goto out;
@ -3648,6 +3649,10 @@ SYSCALL_DEFINE5(linkat, int, olddfd, const char __user *, oldname,
error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry); error = vfs_link(old_path.dentry, new_path.dentry->d_inode, new_dentry);
out_dput: out_dput:
done_path_create(&new_path, new_dentry); done_path_create(&new_path, new_dentry);
if (retry_estale(error, how)) {
how |= LOOKUP_REVAL;
goto retry;
}
out: out:
path_put(&old_path); path_put(&old_path);