xfs_trans_cancel(tp);
return error;
}
+
+/*
+ * Allocate an transaction, lock and join the directory and child inodes to it,
+ * and reserve quota for a directory update. If there isn't sufficient space,
+ * @dblocks will be set to zero for a reservationless directory update and
+ * @nospace_error will be set to a negative errno describing the space
+ * constraint we hit.
+ *
+ * The caller must ensure that the on-disk dquots attached to this inode have
+ * already been allocated and initialized. The ILOCKs will be dropped when the
+ * transaction is committed or cancelled.
+ */
+int
+xfs_trans_alloc_dir(
+ struct xfs_inode *dp,
+ struct xfs_trans_res *resv,
+ struct xfs_inode *ip,
+ unsigned int *dblocks,
+ struct xfs_trans **tpp,
+ int *nospace_error)
+{
+ struct xfs_trans *tp;
+ struct xfs_mount *mp = ip->i_mount;
+ unsigned int resblks;
+ bool retried = false;
+ int error;
+
+retry:
+ *nospace_error = 0;
+ resblks = *dblocks;
+ error = xfs_trans_alloc(mp, resv, resblks, 0, 0, &tp);
+ if (error == -ENOSPC) {
+ *nospace_error = error;
+ resblks = 0;
+ error = xfs_trans_alloc(mp, resv, resblks, 0, 0, &tp);
+ }
+ if (error)
+ return error;
+
+ xfs_lock_two_inodes(dp, XFS_ILOCK_EXCL, ip, XFS_ILOCK_EXCL);
+
+ xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
+
+ error = xfs_qm_dqattach_locked(dp, false);
+ if (error) {
+ /* Caller should have allocated the dquots! */
+ ASSERT(error != -ENOENT);
+ goto out_cancel;
+ }
+
+ error = xfs_qm_dqattach_locked(ip, false);
+ if (error) {
+ /* Caller should have allocated the dquots! */
+ ASSERT(error != -ENOENT);
+ goto out_cancel;
+ }
+
+ if (resblks == 0)
+ goto done;
+
+ error = xfs_trans_reserve_quota_nblks(tp, dp, resblks, 0, false);
+ if (error == -EDQUOT || error == -ENOSPC) {
+ if (!retried) {
+ xfs_trans_cancel(tp);
+ xfs_blockgc_free_quota(dp, 0);
+ retried = true;
+ goto retry;
+ }
+
+ *nospace_error = error;
+ resblks = 0;
+ error = 0;
+ }
+ if (error)
+ goto out_cancel;
+
+done:
+ *tpp = tp;
+ *dblocks = resblks;
+ return 0;
+
+out_cancel:
+ xfs_trans_cancel(tp);
+ return error;
+}