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vfs: fix symlinkat to retry on ESTALE errors

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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 2012-12-11 12:10:08 -05:00 committed by Al Viro
parent b76d8b8226
commit f46d3567b2
1 changed files with 7 additions and 2 deletions
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9
fs/namei.c
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@ -3521,12 +3521,13 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
struct filename *from;
struct dentry *dentry;
struct path path;
unsigned int lookup_flags = 0;
from = getname(oldname);
if (IS_ERR(from))
return PTR_ERR(from);
dentry = user_path_create(newdfd, newname, &path, 0);
retry:
dentry = user_path_create(newdfd, newname, &path, lookup_flags);
error = PTR_ERR(dentry);
if (IS_ERR(dentry))
goto out_putname;
@ -3535,6 +3536,10 @@ SYSCALL_DEFINE3(symlinkat, const char __user *, oldname,
if (!error)
error = vfs_symlink(path.dentry->d_inode, dentry, from->name);
done_path_create(&path, dentry);
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
out_putname:
putname(from);
return error;