commit
471de20303dda0b67981e06d59cc6c4a83fd2a3c upstream.
We flush the data device cache before we issue external log IO. If
the flush fails, we shut down the log immediately and return. However,
the iclog->ic_sema is left in a decremented state so let's add an up().
Prior to this patch, xfs/438 would fail consistently when running with
an external log device:
sync
-> xfs_log_force
-> xlog_write_iclog
-> down(&iclog->ic_sema)
-> blkdev_issue_flush (fail causes us to intiate shutdown)
-> xlog_force_shutdown
-> return
unmount
-> xfs_log_umount
-> xlog_wait_iclog_completion
-> down(&iclog->ic_sema) --------> HANG
There is a second early return / shutdown. Make sure the up() happens
for it as well. Also make sure we cleanup the iclog state,
xlog_state_done_syncing, before dropping the iclog lock.
Fixes:
b5d721eaae47 ("xfs: external logs need to flush data device")
Fixes:
842a42d126b4 ("xfs: shutdown on failure to add page to log bio")
Fixes:
7d839e325af2 ("xfs: check return codes when flushing block devices")
Signed-off-by: Leah Rumancik <leah.rumancik@gmail.com>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Catherine Hoang <catherine.hoang@oracle.com>
Acked-by: Chandan Babu R <chandanbabu@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
* the buffer manually, the code needs to be kept in sync
* with the I/O completion path.
*/
* the buffer manually, the code needs to be kept in sync
* with the I/O completion path.
*/
- xlog_state_done_syncing(iclog);
- up(&iclog->ic_sema);
- return;
* avoid shutdown re-entering this path and erroring out again.
*/
if (log->l_targ != log->l_mp->m_ddev_targp &&
* avoid shutdown re-entering this path and erroring out again.
*/
if (log->l_targ != log->l_mp->m_ddev_targp &&
- blkdev_issue_flush(log->l_mp->m_ddev_targp->bt_bdev)) {
- xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
- return;
- }
+ blkdev_issue_flush(log->l_mp->m_ddev_targp->bt_bdev))
+ goto shutdown;
}
if (iclog->ic_flags & XLOG_ICL_NEED_FUA)
iclog->ic_bio.bi_opf |= REQ_FUA;
iclog->ic_flags &= ~(XLOG_ICL_NEED_FLUSH | XLOG_ICL_NEED_FUA);
}
if (iclog->ic_flags & XLOG_ICL_NEED_FUA)
iclog->ic_bio.bi_opf |= REQ_FUA;
iclog->ic_flags &= ~(XLOG_ICL_NEED_FLUSH | XLOG_ICL_NEED_FUA);
- if (xlog_map_iclog_data(&iclog->ic_bio, iclog->ic_data, count)) {
- xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
- return;
- }
+ if (xlog_map_iclog_data(&iclog->ic_bio, iclog->ic_data, count))
+ goto shutdown;
+
if (is_vmalloc_addr(iclog->ic_data))
flush_kernel_vmap_range(iclog->ic_data, count);
if (is_vmalloc_addr(iclog->ic_data))
flush_kernel_vmap_range(iclog->ic_data, count);
}
submit_bio(&iclog->ic_bio);
}
submit_bio(&iclog->ic_bio);
+ return;
+shutdown:
+ xlog_force_shutdown(log, SHUTDOWN_LOG_IO_ERROR);
+sync:
+ xlog_state_done_syncing(iclog);
+ up(&iclog->ic_sema);