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Commit a5cd74ad authored by Yan, Zheng's avatar Yan, Zheng Committed by Ilya Dryomov
Browse files

ceph: fix -EOLDSNAPC handling 



Need to drop cap reference before retry. Besides, it's better to
redo file write checks for each retry because we re-lock inode.

Signed-off-by: default avatar"Yan, Zheng" <zyan@redhat.com>
Signed-off-by: default avatarIlya Dryomov <idryomov@gmail.com>
parent 5d37ca14

fs/ceph/file.c

+7 −10
Original line number Diff line number Diff line
@@ -1309,6 +1309,7 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) 
	if (!prealloc_cf)

		return -ENOMEM;



retry_snap:

	inode_lock(inode);



	/* We can write back this queue in page reclaim */
@@ -1340,7 +1341,6 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) 
			goto out;

	}



retry_snap:

	/* FIXME: not complete since it doesn't account for being at quota */

	if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_FULL)) {

		err = -ENOSPC;
@@ -1389,14 +1389,6 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) 
							 &prealloc_cf);

		else

			written = ceph_sync_write(iocb, &data, pos, snapc);

		if (written == -EOLDSNAPC) {

			dout("aio_write %p %llx.%llx %llu~%u"

				"got EOLDSNAPC, retrying\n",

				inode, ceph_vinop(inode),

				pos, (unsigned)count);

			inode_lock(inode);

			goto retry_snap;

		}

		if (written > 0)

			iov_iter_advance(from, written);

		ceph_put_snap_context(snapc);
@@ -1430,10 +1422,15 @@ static ssize_t ceph_write_iter(struct kiocb *iocb, struct iov_iter *from) 
	     ceph_cap_string(got));

	ceph_put_cap_refs(ci, got);



	if (written == -EOLDSNAPC) {

		dout("aio_write %p %llx.%llx %llu~%u" "got EOLDSNAPC, retrying\n",

		     inode, ceph_vinop(inode), pos, (unsigned)count);

		goto retry_snap;

	}



	if (written >= 0) {

		if (ceph_osdmap_flag(osdc, CEPH_OSDMAP_NEARFULL))

			iocb->ki_flags |= IOCB_DSYNC;



		written = generic_write_sync(iocb, written);

	}