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MFV r348535: 9677 panic from zio_write_gang_block() when creating dump device on fragmented rpool
illumos/illumos-gate@7341a7de4f Reviewed by: Matt Ahrens <matt@delphix.com> Reviewed by: George Wilson <george.wilson@delphix.com> Reviewed by: Prashanth Sreenivasa <pks@delphix.com> Approved by: Robert Mustacchi <rm@joyent.com> Author: Brad Lewis <brad.lewis@delphix.com>
This commit is contained in:
commit
c066dcc074
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=348558
@ -2319,7 +2319,13 @@ zio_write_gang_member_ready(zio_t *zio)
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static void
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zio_write_gang_done(zio_t *zio)
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{
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abd_put(zio->io_abd);
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/*
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* The io_abd field will be NULL for a zio with no data. The io_flags
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* will initially have the ZIO_FLAG_NODATA bit flag set, but we can't
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* check for it here as it is cleared in zio_ready.
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*/
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if (zio->io_abd != NULL)
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abd_put(zio->io_abd);
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}
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static zio_t *
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@ -2340,11 +2346,12 @@ zio_write_gang_block(zio_t *pio)
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int gbh_copies = MIN(copies + 1, spa_max_replication(spa));
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zio_prop_t zp;
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int error;
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boolean_t has_data = !(pio->io_flags & ZIO_FLAG_NODATA);
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int flags = METASLAB_HINTBP_FAVOR | METASLAB_GANG_HEADER;
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if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
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ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
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ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA));
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ASSERT(has_data);
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flags |= METASLAB_ASYNC_ALLOC;
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VERIFY(refcount_held(&mc->mc_alloc_slots[pio->io_allocator],
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@ -2368,7 +2375,7 @@ zio_write_gang_block(zio_t *pio)
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if (error) {
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if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
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ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
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ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA));
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ASSERT(has_data);
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/*
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* If we failed to allocate the gang block header then
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@ -2421,14 +2428,15 @@ zio_write_gang_block(zio_t *pio)
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zp.zp_nopwrite = B_FALSE;
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zio_t *cio = zio_write(zio, spa, txg, &gbh->zg_blkptr[g],
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abd_get_offset(pio->io_abd, pio->io_size - resid), lsize,
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lsize, &zp, zio_write_gang_member_ready, NULL, NULL,
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has_data ? abd_get_offset(pio->io_abd, pio->io_size -
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resid) : NULL, lsize, lsize, &zp,
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zio_write_gang_member_ready, NULL, NULL,
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zio_write_gang_done, &gn->gn_child[g], pio->io_priority,
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ZIO_GANG_CHILD_FLAGS(pio), &pio->io_bookmark);
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if (pio->io_flags & ZIO_FLAG_IO_ALLOCATING) {
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ASSERT(pio->io_priority == ZIO_PRIORITY_ASYNC_WRITE);
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ASSERT(!(pio->io_flags & ZIO_FLAG_NODATA));
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ASSERT(has_data);
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/*
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* Gang children won't throttle but we should
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