The patch titled Subject: ocfs2: fix non-auto defrag path not working issue has been added to the -mm mm-hotfixes-unstable branch. Its filename is ocfs2-fix-non-auto-defrag-path-not-working-issue.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Heming Zhao via Ocfs2-devel ocfs2-devel@oss.oracle.com Subject: ocfs2: fix non-auto defrag path not working issue Date: Mon, 20 Feb 2023 13:05:26 +0800

This fixes three issues on move extents ioctl without auto defrag:

a) In ocfs2_find_victim_alloc_group(), we have to convert bits to block first in case of global bitmap.

b) In ocfs2_probe_alloc_group(), when finding enough bits in block group bitmap, we have to back off move_len to start pos as well, otherwise it may corrupt filesystem.

c) In ocfs2_ioctl_move_extents(), set me_threshold both for non-auto and auto defrag paths. Otherwise it will set move_max_hop to 0 and finally cause unexpectedly ENOSPC error.

Currently there are no tools triggering the above issues since defragfs.ocfs2 enables auto defrag by default. Tested with manually changing defragfs.ocfs2 to run non auto defrag path.

Link: https://lkml.kernel.org/r/20230220050526.22020-1-heming.zhao@suse.com Signed-off-by: Heming Zhao heming.zhao@suse.com Reviewed-by: Joseph Qi joseph.qi@linux.alibaba.com Cc: Mark Fasheh mark@fasheh.com Cc: Joel Becker jlbec@evilplan.org Cc: Junxiao Bi junxiao.bi@oracle.com Cc: Changwei Ge gechangwei@live.cn Cc: Gang He ghe@suse.com Cc: Jun Piao piaojun@huawei.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

fs/ocfs2/move_extents.c | 24 +++++++++++++----------- 1 file changed, 13 insertions(+), 11 deletions(-)

--- a/fs/ocfs2/move_extents.c~ocfs2-fix-non-auto-defrag-path-not-working-issue +++ a/fs/ocfs2/move_extents.c @@ -434,7 +434,7 @@ static int ocfs2_find_victim_alloc_group bg = (struct ocfs2_group_desc *)gd_bh->b_data;

if (vict_blkno < (le64_to_cpu(bg->bg_blkno) + - le16_to_cpu(bg->bg_bits))) { + (le16_to_cpu(bg->bg_bits) << bits_per_unit))) {

*ret_bh = gd_bh; *vict_bit = (vict_blkno - blkno) >> @@ -549,6 +549,7 @@ static void ocfs2_probe_alloc_group(stru last_free_bits++;

if (last_free_bits == move_len) { + i -= move_len; *goal_bit = i; *phys_cpos = base_cpos + i; break; @@ -1020,18 +1021,19 @@ int ocfs2_ioctl_move_extents(struct file

context->range = &range;

+ /* + * ok, the default theshold for the defragmentation + * is 1M, since our maximum clustersize was 1M also. + * any thought? + */ + if (!range.me_threshold) + range.me_threshold = 1024 * 1024; + + if (range.me_threshold > i_size_read(inode)) + range.me_threshold = i_size_read(inode); + if (range.me_flags & OCFS2_MOVE_EXT_FL_AUTO_DEFRAG) { context->auto_defrag = 1; - /* - * ok, the default theshold for the defragmentation - * is 1M, since our maximum clustersize was 1M also. - * any thought? - */ - if (!range.me_threshold) - range.me_threshold = 1024 * 1024; - - if (range.me_threshold > i_size_read(inode)) - range.me_threshold = i_size_read(inode);

if (range.me_flags & OCFS2_MOVE_EXT_FL_PART_DEFRAG) context->partial = 1; _

Patches currently in -mm which might be from ocfs2-devel@oss.oracle.com are

ocfs2-fix-defrag-path-triggering-jbd2-assert.patch ocfs2-fix-non-auto-defrag-path-not-working-issue.patch