From: "Darrick J. Wong" <darrick.wong@oracle.com>
To: darrick.wong@oracle.com
Cc: linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org,
linux-api@vger.kernel.org
Subject: [PATCH 13/18] xfs: allow xfs_swap_range to use older extent swap algorithms
Date: Tue, 28 Apr 2020 19:45:39 -0700 [thread overview]
Message-ID: <158812833911.168506.9347356534527509263.stgit@magnolia> (raw)
In-Reply-To: <158812825316.168506.932540609191384366.stgit@magnolia>
From: Darrick J. Wong <darrick.wong@oracle.com>
If userspace permits non-atomic swap operations, use the older code
paths to implement the same functionality.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
---
fs/xfs/xfs_bmap_util.c | 42 ++++++++++++++++++++++++++++++++++++------
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index a8bd2627d76e..72aebf7ed42d 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -2063,9 +2063,6 @@ xfs_swap_range(
unsigned int sxflags = 0;
int error;
- if (!xfs_sb_version_hasatomicswap(&mp->m_sb))
- return -EOPNOTSUPP;
-
startoff1 = XFS_B_TO_FSBT(mp, fsr->file1_offset);
startoff2 = XFS_B_TO_FSBT(mp, fsr->file2_offset);
@@ -2135,12 +2132,45 @@ xfs_swap_range(
if (error)
goto out_trans_cancel;
- /* Perform the file range swap. */
if (fsr->flags & FILE_SWAP_RANGE_TO_EOF)
sxflags |= XFS_SWAPEXT_SET_SIZES;
- error = xfs_swapext_atomic(&tp, ip1, ip2, XFS_DATA_FORK, startoff1,
- startoff2, blockcount, sxflags);
+ /* Perform the file range swap... */
+ if (xfs_sb_version_hasatomicswap(&mp->m_sb)) {
+ /* ...by using the atomic swap, since it's available. */
+ error = xfs_swapext_atomic(&tp, ip1, ip2, XFS_DATA_FORK,
+ startoff1, startoff2, blockcount, sxflags);
+ } else if ((fsr->flags & FILE_SWAP_RANGE_NONATOMIC) &&
+ (xfs_sb_version_hasreflink(&mp->m_sb) ||
+ xfs_sb_version_hasrmapbt(&mp->m_sb))) {
+ /*
+ * ...by using deferred bmap operations, which are only
+ * supported if userspace is ok with a non-atomic swap
+ * (e.g. xfs_fsr) and the log supports deferred bmap.
+ */
+ error = xfs_swapext_deferred_bmap(&tp, ip1, ip2, XFS_DATA_FORK,
+ startoff1, startoff2, blockcount, sxflags);
+ } else if ((fsr->flags & FILE_SWAP_RANGE_NONATOMIC) &&
+ !(fsr->flags & FILE_SWAP_RANGE_TO_EOF) &&
+ fsr->file1_offset == 0 && fsr->file2_offset == 0 &&
+ fsr->length == ip1->i_d.di_size &&
+ fsr->length == ip2->i_d.di_size) {
+ /*
+ * ...by using the old bmap owner change code, if we're doing
+ * a full file swap and we're ok with non-atomic mode.
+ */
+ error = xfs_swap_extents_check_format(ip2, ip1);
+ if (error) {
+ xfs_notice(mp,
+ "%s: inode 0x%llx format is incompatible for exchanging.",
+ __func__, ip2->i_ino);
+ goto out_trans_cancel;
+ }
+ error = xfs_swap_extent_forks(&tp, ip2, ip1);
+ } else {
+ /* ...or not at all, because we cannot do it. */
+ error = -EOPNOTSUPP;
+ }
if (error)
goto out_trans_cancel;
next prev parent reply other threads:[~2020-04-29 2:45 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-29 2:44 [PATCH RFC 00/18] xfs: atomic file updates Darrick J. Wong
2020-04-29 2:44 ` [PATCH 01/18] xfs: clean up the error handling in xfs_swap_extent_rmap Darrick J. Wong
2020-04-29 2:44 ` [PATCH 02/18] xfs: fix xfs_reflink_remap_prep calling conventions Darrick J. Wong
2020-05-01 22:54 ` Allison Collins
2020-04-29 2:44 ` [PATCH 03/18] vfs: introduce new file extent swap ioctl Darrick J. Wong
2020-04-29 2:44 ` [PATCH 04/18] xfs: support deferred bmap updates on the attr fork Darrick J. Wong
2020-04-29 2:44 ` [PATCH 05/18] xfs: xfs_bmap_finish_one should map unwritten extents properly Darrick J. Wong
2020-04-29 2:44 ` [PATCH 06/18] xfs: create a log incompat flag for atomic extent swapping Darrick J. Wong
2020-04-29 2:45 ` [PATCH 07/18] xfs: allow deferred ops items to put themselves at the end of the pending queue Darrick J. Wong
2020-04-29 2:45 ` [PATCH 08/18] xfs: introduce a swap-extent log intent item Darrick J. Wong
2020-04-29 2:45 ` [PATCH 09/18] xfs: create deferred log items for extent swapping Darrick J. Wong
2020-04-29 2:45 ` [PATCH 10/18] xfs: refactor locking and unlocking two inodes against userspace IO Darrick J. Wong
2020-04-29 2:45 ` [PATCH 11/18] xfs: add a ->swap_file_range handler Darrick J. Wong
2020-04-29 2:45 ` [PATCH 12/18] xfs: add error injection to test swapext recovery Darrick J. Wong
2020-04-29 2:45 ` Darrick J. Wong [this message]
2020-04-29 2:45 ` [PATCH 14/18] xfs: port xfs_swap_extents_rmap to our new code Darrick J. Wong
2020-04-29 2:45 ` [PATCH 15/18] xfs: consolidate all of the xfs_swap_extent_forks code Darrick J. Wong
2020-04-29 2:45 ` [PATCH 16/18] xfs: refactor reflink flag handling in xfs_swap_extent_forks Darrick J. Wong
2020-04-29 2:46 ` [PATCH 17/18] xfs: remove old swap extents implementation Darrick J. Wong
2020-04-29 2:46 ` [PATCH 18/18] xfs: fix quota accounting in the old fork swap code Darrick J. Wong
2020-05-01 19:46 ` [PATCH RFC 00/18] xfs: atomic file updates Jann Horn
2020-05-01 20:11 ` Darrick J. Wong
2021-04-01 1:08 [PATCHSET RFC v3 " Darrick J. Wong
2021-04-01 1:09 ` [PATCH 13/18] xfs: allow xfs_swap_range to use older extent swap algorithms Darrick J. Wong
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=158812833911.168506.9347356534527509263.stgit@magnolia \
--to=darrick.wong@oracle.com \
--cc=linux-api@vger.kernel.org \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-xfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).