vfs: have faccessat retry once on an ESTALE error (87fa5595) · Commits · e / devices / android_kernel_teracube_emerald

fs/open.c

+7 −2

Original line number	Diff line number	Diff line
		@@ -316,6 +316,7 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
		struct path path;
		struct inode *inode;
		int res;
		unsigned int lookup_flags = LOOKUP_FOLLOW;

		if (mode & ~S_IRWXO) /* where's F_OK, X_OK, W_OK, R_OK? */
		return -EINVAL;
		@@ -338,8 +339,8 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)
		}

		old_cred = override_creds(override_cred);

		res = user_path_at(dfd, filename, LOOKUP_FOLLOW, &path);
		retry:
		res = user_path_at(dfd, filename, lookup_flags, &path);
		if (res)
		goto out;

		@@ -374,6 +375,10 @@ SYSCALL_DEFINE3(faccessat, int, dfd, const char __user *, filename, int, mode)

		out_path_release:
		path_put(&path);
		if (retry_estale(res, lookup_flags)) {
		lookup_flags \|= LOOKUP_REVAL;
		goto retry;
		}
		out:
		revert_creds(old_cred);
		put_cred(override_cred);