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vfs: fix user_statfs to retry once 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 12:10:14 -05:00 committed by Al Viro
parent 99a5df37a0
commit 96948fc606
1 changed files with 8 additions and 1 deletions
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9
fs/statfs.c
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@ -77,10 +77,17 @@ EXPORT_SYMBOL(vfs_statfs);
int user_statfs(const char __user *pathname, struct kstatfs *st) int user_statfs(const char __user *pathname, struct kstatfs *st)
{ {
struct path path; struct path path;
int error = user_path_at(AT_FDCWD, pathname, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path); int error;
unsigned int lookup_flags = LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT;
retry:
error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (!error) { if (!error) {
error = vfs_statfs(&path, st); error = vfs_statfs(&path, st);
path_put(&path); path_put(&path);
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
} }
return error; return error;
} }