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dm-mirror: Support atomic writes 

JIRA: https://issues.redhat.com/browse/RHEL-84906
Upstream Status: kernel/git/torvalds/linux.git

commit 6845de78ae3701ed19619cf786695072c73b8e92
Author: John Garry <john.g.garry@oracle.com>
Date:   Thu Jan 16 17:03:01 2025 +0000

    dm-mirror: Support atomic writes

    Support atomic writes by setting DM_TARGET_ATOMIC_WRITES for the target
    type, and also unmasking REQ_ATOMIC from the submitted bio op flags.

    Signed-off-by: John Garry <john.g.garry@oracle.com>
    Reviewed-by: Mike Snitzer <snitzer@kernel.org>
    Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>

Signed-off-by: Benjamin Marzinski <bmarzins@redhat.com>
This commit is contained in:
Benjamin Marzinski 2025-04-01 19:05:06 -04:00
parent 6d46054b10
commit 93a7a15faa
1 changed files with 3 additions and 2 deletions
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5
drivers/md/dm-raid1.c
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@ -656,7 +656,7 @@ static void do_write(struct mirror_set *ms, struct bio *bio)
unsigned int i;
struct dm_io_region io[MAX_NR_MIRRORS], *dest = io;
struct mirror *m;
blk_opf_t op_flags = bio->bi_opf & (REQ_FUA | REQ_PREFLUSH);
blk_opf_t op_flags = bio->bi_opf & (REQ_FUA | REQ_PREFLUSH | REQ_ATOMIC);
struct dm_io_request io_req = {
.bi_opf = REQ_OP_WRITE | op_flags,
.mem.type = DM_IO_BIO,
@ -1483,8 +1483,9 @@ static int mirror_iterate_devices(struct dm_target *ti,
static struct target_type mirror_target = {
.name = "mirror",
.version = {1, 14, 0},
.version = {1, 15, 0},
.module = THIS_MODULE,
.features = DM_TARGET_ATOMIC_WRITES,
.ctr = mirror_ctr,
.dtr = mirror_dtr,
.map = mirror_map,