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Re: [PATCH V3 1/6] block/rbd: bump librbd requirement to luminous releas
From: |
Peter Lieven |
Subject: |
Re: [PATCH V3 1/6] block/rbd: bump librbd requirement to luminous release |
Date: |
Fri, 18 Jun 2021 10:58:10 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
Am 16.06.21 um 14:26 schrieb Ilya Dryomov:
> On Wed, May 19, 2021 at 4:26 PM Peter Lieven <pl@kamp.de> wrote:
>> even luminous (version 12.2) is unmaintained for over 3 years now.
>> Bump the requirement to get rid of the ifdef'ry in the code.
>> Qemu 6.1 dropped the support for RHEL-7 which was the last supported
>> OS that required an older librbd.
>>
>> Signed-off-by: Peter Lieven <pl@kamp.de>
>> ---
>> block/rbd.c | 120 ++++------------------------------------------------
>> meson.build | 7 ++-
>> 2 files changed, 13 insertions(+), 114 deletions(-)
>>
>> diff --git a/block/rbd.c b/block/rbd.c
>> index 26f64cce7c..6b1cbe1d75 100644
>> --- a/block/rbd.c
>> +++ b/block/rbd.c
>> @@ -55,24 +55,10 @@
>> * leading "\".
>> */
>>
>> -/* rbd_aio_discard added in 0.1.2 */
>> -#if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 2)
>> -#define LIBRBD_SUPPORTS_DISCARD
>> -#else
>> -#undef LIBRBD_SUPPORTS_DISCARD
>> -#endif
>> -
>> #define OBJ_MAX_SIZE (1UL << OBJ_DEFAULT_OBJ_ORDER)
>>
>> #define RBD_MAX_SNAPS 100
>>
>> -/* The LIBRBD_SUPPORTS_IOVEC is defined in librbd.h */
>> -#ifdef LIBRBD_SUPPORTS_IOVEC
>> -#define LIBRBD_USE_IOVEC 1
>> -#else
>> -#define LIBRBD_USE_IOVEC 0
>> -#endif
>> -
>> typedef enum {
>> RBD_AIO_READ,
>> RBD_AIO_WRITE,
>> @@ -84,7 +70,6 @@ typedef struct RBDAIOCB {
>> BlockAIOCB common;
>> int64_t ret;
>> QEMUIOVector *qiov;
>> - char *bounce;
>> RBDAIOCmd cmd;
>> int error;
>> struct BDRVRBDState *s;
>> @@ -94,7 +79,6 @@ typedef struct RADOSCB {
>> RBDAIOCB *acb;
>> struct BDRVRBDState *s;
>> int64_t size;
>> - char *buf;
>> int64_t ret;
>> } RADOSCB;
>>
>> @@ -342,13 +326,9 @@ static int qemu_rbd_set_keypairs(rados_t cluster, const
>> char *keypairs_json,
>>
>> static void qemu_rbd_memset(RADOSCB *rcb, int64_t offs)
>> {
>> - if (LIBRBD_USE_IOVEC) {
>> - RBDAIOCB *acb = rcb->acb;
>> - iov_memset(acb->qiov->iov, acb->qiov->niov, offs, 0,
>> - acb->qiov->size - offs);
>> - } else {
>> - memset(rcb->buf + offs, 0, rcb->size - offs);
>> - }
>> + RBDAIOCB *acb = rcb->acb;
>> + iov_memset(acb->qiov->iov, acb->qiov->niov, offs, 0,
>> + acb->qiov->size - offs);
>> }
>>
>> /* FIXME Deprecate and remove keypairs or make it available in QMP. */
>> @@ -504,13 +484,6 @@ static void qemu_rbd_complete_aio(RADOSCB *rcb)
>>
>> g_free(rcb);
>>
>> - if (!LIBRBD_USE_IOVEC) {
>> - if (acb->cmd == RBD_AIO_READ) {
>> - qemu_iovec_from_buf(acb->qiov, 0, acb->bounce, acb->qiov->size);
>> - }
>> - qemu_vfree(acb->bounce);
>> - }
>> -
>> acb->common.cb(acb->common.opaque, (acb->ret > 0 ? 0 : acb->ret));
>>
>> qemu_aio_unref(acb);
>> @@ -878,28 +851,6 @@ static void rbd_finish_aiocb(rbd_completion_t c,
>> RADOSCB *rcb)
>> rbd_finish_bh, rcb);
>> }
>>
>> -static int rbd_aio_discard_wrapper(rbd_image_t image,
>> - uint64_t off,
>> - uint64_t len,
>> - rbd_completion_t comp)
>> -{
>> -#ifdef LIBRBD_SUPPORTS_DISCARD
>> - return rbd_aio_discard(image, off, len, comp);
>> -#else
>> - return -ENOTSUP;
>> -#endif
>> -}
>> -
>> -static int rbd_aio_flush_wrapper(rbd_image_t image,
>> - rbd_completion_t comp)
>> -{
>> -#ifdef LIBRBD_SUPPORTS_AIO_FLUSH
>> - return rbd_aio_flush(image, comp);
>> -#else
>> - return -ENOTSUP;
>> -#endif
>> -}
>> -
>> static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
>> int64_t off,
>> QEMUIOVector *qiov,
>> @@ -922,21 +873,6 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
>>
>> rcb = g_new(RADOSCB, 1);
>>
>> - if (!LIBRBD_USE_IOVEC) {
>> - if (cmd == RBD_AIO_DISCARD || cmd == RBD_AIO_FLUSH) {
>> - acb->bounce = NULL;
>> - } else {
>> - acb->bounce = qemu_try_blockalign(bs, qiov->size);
>> - if (acb->bounce == NULL) {
>> - goto failed;
>> - }
>> - }
>> - if (cmd == RBD_AIO_WRITE) {
>> - qemu_iovec_to_buf(acb->qiov, 0, acb->bounce, qiov->size);
>> - }
>> - rcb->buf = acb->bounce;
>> - }
>> -
>> acb->ret = 0;
>> acb->error = 0;
>> acb->s = s;
>> @@ -950,7 +886,7 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
>> }
>>
>> switch (cmd) {
>> - case RBD_AIO_WRITE: {
>> + case RBD_AIO_WRITE:
>> /*
>> * RBD APIs don't allow us to write more than actual size, so in
>> order
>> * to support growing images, we resize the image before write
>> @@ -962,25 +898,16 @@ static BlockAIOCB *rbd_start_aio(BlockDriverState *bs,
>> goto failed_completion;
>> }
>> }
>> -#ifdef LIBRBD_SUPPORTS_IOVEC
>> - r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, off, c);
>> -#else
>> - r = rbd_aio_write(s->image, off, size, rcb->buf, c);
>> -#endif
>> + r = rbd_aio_writev(s->image, qiov->iov, qiov->niov, off, c);
>> break;
>> - }
>> case RBD_AIO_READ:
>> -#ifdef LIBRBD_SUPPORTS_IOVEC
>> - r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, off, c);
>> -#else
>> - r = rbd_aio_read(s->image, off, size, rcb->buf, c);
>> -#endif
>> + r = rbd_aio_readv(s->image, qiov->iov, qiov->niov, off, c);
>> break;
>> case RBD_AIO_DISCARD:
>> - r = rbd_aio_discard_wrapper(s->image, off, size, c);
>> + r = rbd_aio_discard(s->image, off, size, c);
>> break;
>> case RBD_AIO_FLUSH:
>> - r = rbd_aio_flush_wrapper(s->image, c);
>> + r = rbd_aio_flush(s->image, c);
>> break;
>> default:
>> r = -EINVAL;
>> @@ -995,9 +922,6 @@ failed_completion:
>> rbd_aio_release(c);
>> failed:
>> g_free(rcb);
>> - if (!LIBRBD_USE_IOVEC) {
>> - qemu_vfree(acb->bounce);
>> - }
>>
>> qemu_aio_unref(acb);
>> return NULL;
>> @@ -1023,7 +947,6 @@ static BlockAIOCB
>> *qemu_rbd_aio_pwritev(BlockDriverState *bs,
>> RBD_AIO_WRITE);
>> }
>>
>> -#ifdef LIBRBD_SUPPORTS_AIO_FLUSH
>> static BlockAIOCB *qemu_rbd_aio_flush(BlockDriverState *bs,
>> BlockCompletionFunc *cb,
>> void *opaque)
>> @@ -1031,20 +954,6 @@ static BlockAIOCB *qemu_rbd_aio_flush(BlockDriverState
>> *bs,
>> return rbd_start_aio(bs, 0, NULL, 0, cb, opaque, RBD_AIO_FLUSH);
>> }
>>
>> -#else
>> -
>> -static int qemu_rbd_co_flush(BlockDriverState *bs)
>> -{
>> -#if LIBRBD_VERSION_CODE >= LIBRBD_VERSION(0, 1, 1)
>> - /* rbd_flush added in 0.1.1 */
>> - BDRVRBDState *s = bs->opaque;
>> - return rbd_flush(s->image);
>> -#else
>> - return 0;
>> -#endif
>> -}
>> -#endif
>> -
>> static int qemu_rbd_getinfo(BlockDriverState *bs, BlockDriverInfo *bdi)
>> {
>> BDRVRBDState *s = bs->opaque;
>> @@ -1210,7 +1119,6 @@ static int qemu_rbd_snap_list(BlockDriverState *bs,
>> return snap_count;
>> }
>>
>> -#ifdef LIBRBD_SUPPORTS_DISCARD
>> static BlockAIOCB *qemu_rbd_aio_pdiscard(BlockDriverState *bs,
>> int64_t offset,
>> int bytes,
>> @@ -1220,9 +1128,7 @@ static BlockAIOCB
>> *qemu_rbd_aio_pdiscard(BlockDriverState *bs,
>> return rbd_start_aio(bs, offset, NULL, bytes, cb, opaque,
>> RBD_AIO_DISCARD);
>> }
>> -#endif
>>
>> -#ifdef LIBRBD_SUPPORTS_INVALIDATE
>> static void coroutine_fn qemu_rbd_co_invalidate_cache(BlockDriverState *bs,
>> Error **errp)
>> {
>> @@ -1232,7 +1138,6 @@ static void coroutine_fn
>> qemu_rbd_co_invalidate_cache(BlockDriverState *bs,
>> error_setg_errno(errp, -r, "Failed to invalidate the cache");
>> }
>> }
>> -#endif
>>
>> static QemuOptsList qemu_rbd_create_opts = {
>> .name = "rbd-create-opts",
>> @@ -1290,23 +1195,14 @@ static BlockDriver bdrv_rbd = {
>> .bdrv_aio_preadv = qemu_rbd_aio_preadv,
>> .bdrv_aio_pwritev = qemu_rbd_aio_pwritev,
>>
>> -#ifdef LIBRBD_SUPPORTS_AIO_FLUSH
>> .bdrv_aio_flush = qemu_rbd_aio_flush,
>> -#else
>> - .bdrv_co_flush_to_disk = qemu_rbd_co_flush,
>> -#endif
>> -
>> -#ifdef LIBRBD_SUPPORTS_DISCARD
>> .bdrv_aio_pdiscard = qemu_rbd_aio_pdiscard,
>> -#endif
>>
>> .bdrv_snapshot_create = qemu_rbd_snap_create,
>> .bdrv_snapshot_delete = qemu_rbd_snap_remove,
>> .bdrv_snapshot_list = qemu_rbd_snap_list,
>> .bdrv_snapshot_goto = qemu_rbd_snap_rollback,
>> -#ifdef LIBRBD_SUPPORTS_INVALIDATE
>> .bdrv_co_invalidate_cache = qemu_rbd_co_invalidate_cache,
>> -#endif
>>
>> .strong_runtime_opts = qemu_rbd_strong_runtime_opts,
>> };
>> diff --git a/meson.build b/meson.build
>> index 1559e8d873..644ef36476 100644
>> --- a/meson.build
>> +++ b/meson.build
>> @@ -721,13 +721,16 @@ if not get_option('rbd').auto() or have_block
>> int main(void) {
>> rados_t cluster;
>> rados_create(&cluster, NULL);
>> + #if LIBRBD_VERSION_CODE < LIBRBD_VERSION(1, 12, 0)
>> + #error
> Hi Peter,
>
> Just a nit, but I would stick to the actual version of the library
> instead of the package version. librbd major version is 1, librados
> major version is 2 -- it shows up in ldd, when listing /usr/lib, etc.
> Something like
>
> #error librbd >= 1.12.0 required
>
> here
Okay.
>
>> + #endif
>> return 0;
>> }''', dependencies: [librbd, librados])
>> rbd = declare_dependency(dependencies: [librbd, librados])
>> elif get_option('rbd').enabled()
>> - error('could not link librados')
>> + error('librados/librbd >= 12.0.0 required')
> and
>
> error('could not link librados/librbd')
>
>> else
>> - warning('could not link librados, disabling')
>> + warning('librados/librbd >= 12.0.0 not found, disabling rbd support')
> warning('could not link librados/librbd, disabling')
>
> here to avoid repeating the version.
I would only like to change it if the "#error" is visible in the actual
configure output. Have not testet your proposal yet.
If its visible I am fine to change it.
Peter