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Re: [PATCH V3 1/6] block/rbd: bump librbd requirement to luminous releas
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From: |
Ilya Dryomov |
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Subject: |
Re: [PATCH V3 1/6] block/rbd: bump librbd requirement to luminous release |
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Date: |
Fri, 18 Jun 2021 12:21:27 +0200 |
On Fri, Jun 18, 2021 at 10:58 AM Peter Lieven <pl@kamp.de> wrote:
>
> 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.
Looks like it's not, only in build/meson-logs/meson-log.txt.
In that case, just tweak the version numbers and since librados and
librbd have different versions, don't mention librados.
Thanks,
Ilya