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block: remove AioContext locking

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This is the big patch that removes
aio_context_acquire()/aio_context_release() from the block layer and
affected block layer users.

There isn't a clean way to split this patch and the reviewers are likely
the same group of people, so I decided to do it in one patch.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Message-ID: <20231205182011.1976568-7-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2023-12-05 13:20:03 -05:00 • committed by Kevin Wolf
parent 6bc30f1949
commit b49f4755c7
41 changed files with 104 additions and 1169 deletions
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29
block/monitor/block-hmp-cmds.c
View file

@ -141,7 +141,6 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
const char *id = qdict_get_str(qdict, "id");
BlockBackend *blk;
BlockDriverState *bs;
AioContext *aio_context;
Error *local_err = NULL;
GLOBAL_STATE_CODE();
@ -168,14 +167,10 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
return;
}
aio_context = blk_get_aio_context(blk);
aio_context_acquire(aio_context);
bs = blk_bs(blk);
if (bs) {
if (bdrv_op_is_blocked(bs, BLOCK_OP_TYPE_DRIVE_DEL, &local_err)) {
error_report_err(local_err);
aio_context_release(aio_context);
return;
}
@ -196,8 +191,6 @@ void hmp_drive_del(Monitor *mon, const QDict *qdict)
} else {
blk_unref(blk);
}
aio_context_release(aio_context);
}
void hmp_commit(Monitor *mon, const QDict *qdict)
@ -213,7 +206,6 @@ void hmp_commit(Monitor *mon, const QDict *qdict)
ret = blk_commit_all();
} else {
BlockDriverState *bs;
AioContext *aio_context;
blk = blk_by_name(device);
if (!blk) {
@ -222,18 +214,13 @@ void hmp_commit(Monitor *mon, const QDict *qdict)
}
bs = bdrv_skip_implicit_filters(blk_bs(blk));
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
if (!blk_is_available(blk)) {
error_report("Device '%s' has no medium", device);
aio_context_release(aio_context);
return;
}
ret = bdrv_commit(bs);
aio_context_release(aio_context);
}
if (ret < 0) {
error_report("'commit' error for '%s': %s", device, strerror(-ret));
@ -560,7 +547,6 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
BlockBackend *blk = NULL;
BlockDriverState *bs = NULL;
BlockBackend *local_blk = NULL;
AioContext *ctx = NULL;
bool qdev = qdict_get_try_bool(qdict, "qdev", false);
const char *device = qdict_get_str(qdict, "device");
const char *command = qdict_get_str(qdict, "command");
@ -582,9 +568,6 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
}
}
ctx = blk ? blk_get_aio_context(blk) : bdrv_get_aio_context(bs);
aio_context_acquire(ctx);
if (bs) {
blk = local_blk = blk_new(bdrv_get_aio_context(bs), 0, BLK_PERM_ALL);
ret = blk_insert_bs(blk, bs, &err);
@ -622,11 +605,6 @@ void hmp_qemu_io(Monitor *mon, const QDict *qdict)
fail:
blk_unref(local_blk);
if (ctx) {
aio_context_release(ctx);
}
hmp_handle_error(mon, err);
}
@ -882,7 +860,6 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
int nb_sns, i;
int total;
int *global_snapshots;
AioContext *aio_context;
typedef struct SnapshotEntry {
QEMUSnapshotInfo sn;
@ -909,11 +886,8 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
error_report_err(err);
return;
}
aio_context = bdrv_get_aio_context(bs);
aio_context_acquire(aio_context);
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
aio_context_release(aio_context);
if (nb_sns < 0) {
monitor_printf(mon, "bdrv_snapshot_list: error %d\n", nb_sns);
@ -924,9 +898,7 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
int bs1_nb_sns = 0;
ImageEntry *ie;
SnapshotEntry *se;
AioContext *ctx = bdrv_get_aio_context(bs1);
aio_context_acquire(ctx);
if (bdrv_can_snapshot(bs1)) {
sn = NULL;
bs1_nb_sns = bdrv_snapshot_list(bs1, &sn);
@ -944,7 +916,6 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
}
g_free(sn);
}
aio_context_release(ctx);
}
if (no_snapshot) {