Author: mav Date: Mon Jun 3 17:27:25 2019 New Revision: 348558 URL: https://svnweb.freebsd.org/changeset/base/348558
Log: MFV r348535: 9677 panic from zio_write_gang_block() when creating dump device on fragmented rpool illumos/illumos-gate@7341a7de4f0489193e0cfe11049a7bcf1596a4db Reviewed by: Matt Ahrens <m...@delphix.com> Reviewed by: George Wilson <george.wil...@delphix.com> Reviewed by: Prashanth Sreenivasa <p...@delphix.com> Approved by: Robert Mustacchi <r...@joyent.com> Author: Brad Lewis <brad.le...@delphix.com> Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Directory Properties: head/sys/cddl/contrib/opensolaris/ (props changed) Modified: head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c ============================================================================== --- head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Mon Jun 3 17:19:05 2019 (r348557) +++ head/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c Mon Jun 3 17:27:25 2019 (r348558) @@ -2319,7 +2319,13 @@ zio_write_gang_member_ready(zio_t *zio) static void zio_write_gang_done(zio_t *zio) { - abd_put(zio->io_abd); + /* + * The io_abd field will be NULL for a zio with no data. The io_flags + * will initially have the ZIO_FLAG_NODATA bit flag set, but we can't + * check for it here as it is cleared in zio_ready. + */ + if (zio->io_abd != NULL) + abd_put(zio->io_abd); } static zio_t * @@ -2340,11 +2346,12 @@ zio_write_gang_block(zio_t *pio) int gbh_copies = MIN(copies + 1, spa_max_replication(spa)); zio_prop_t zp; int error; + boolean_t has_data = !(pio->io_flags & ZIO_FLAG_NODATA); int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER; if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); - ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); + ASSERT(has_data); flags |= METASLAB_ASYNC_ALLOC; VERIFY(refcount_held(&mc->mc_alloc_slots[pio->io_allocator], @@ -2368,7 +2375,7 @@ zio_write_gang_block(zio_t *pio) if (error) { if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); - ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); + ASSERT(has_data); /* * If we failed to allocate the gang block header then @@ -2421,14 +2428,15 @@ zio_write_gang_block(zio_t *pio) zp.zp_nopwrite = B_FALSE; zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g], - abd_get_offset(pio->io_abd, pio->io_size - resid), lsize, - lsize, &zp, zio_write_gang_member_ready, NULL, NULL, + has_data ? abd_get_offset(pio->io_abd, pio->io_size - + resid) : NULL, lsize, lsize, &zp, + zio_write_gang_member_ready, NULL, NULL, zio_write_gang_done, &gn->gn_child[g], pio->io_priority, ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark); if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) { ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE); - ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA)); + ASSERT(has_data); /* * Gang children won't throttle but we should _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"