d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

MFV r348535: 9677 panic from zio_write_gang_block() when creating dump device on fragmented rpool

Browse Source 
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:
Alexander Motin 2019-06-03 17:27:25 +00:00
commit c066dcc074
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=348558
1 changed files with 14 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zio.c
View File

@ -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