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mirror_zfs/include/sys
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Brian Behlendorf 20176224ee mmp: claim sequence id before final import 
As part of SPA_LOAD_IMPORT add an additional activity check to
detect simultaneous imports from different hosts.  This check is
only required when the timing is such that there's no activity
for the the read-only tryimport check to detect.  This extra
safety chceck operates as follows:

1. Repeats the following MMP check 10 times:
  a. Write out an MMP uberblock with the best txg and a random
     sequence id to all primary pool vdevs.
  b. Verify a minimum number of good writes such that even if
     the pool appears degraded on the remote host it will see
     at least one of the updated MMP uberblocks.
  c. Wait for the MMP interval this leaves a window for other
     racing hosts to make similar modifications which can be
     detected.
  d. Call vdev_uberblock_load() to determine the best uberblock
     to use, this should be the MMP uberblock just written.
  e. Verify the txg and random sequeunce number match the MMP
     uberblock written in 1a.

2. Restore the original MMP uberblocks.  This allows the check
   to be performed again if the pool fails to import for an
   unrelated reason.

This change also includes some refactoring and minor improvements.

- Never try loading earlier txgs during import when the import
  fails with EREMOTEIO or EINTER.  These errors don't indicate
  the txg is damaged but instead that its either in use on a
  remote host or the import was interactively cancelled.  No
  rewind is also performed for EBADD which can result from a
  stale trusted config when doing a verbatim import.

- Refactor the code for consistent logging of the multihost
  activity check using spa_load_note() and console messages
  indicating when the activity check was trigger and the result.

- Added MMP_*_MASK and MMP_SEQ_CLEAR() macros to allow easier
  modification of the sequence number in an uberblock.

- Added ZFS_LOAD_INFO_DEBUG environment variable which can be
  set to log to dump to stdout the spa_load_info nvlist returned
  during import.  This is used by the updated mmp test cases
  to determine if an activity check was run and its result.

- Standardize the mmp messages similarly to make it easier to
  find all the relevent mmp lines in the debug log.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Akash B <akash-b@hpe.com>
2026-02-09 09:36:01 -08:00
..
crypto icp: remove global icp includes 2025-11-12 10:03:51 -08:00
fm Detect a slow raidz child during reads 2025-09-10 15:25:03 -07:00
fs mmp: claim sequence id before final import 2026-02-09 09:36:01 -08:00
lua SPDX: license tags: MIT 2025-03-13 17:56:54 -07:00
sysevent SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zstd SPDX: license tags: BSD-3-Clause 2025-03-13 17:56:50 -07:00
abd_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
abd.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
aggsum.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
arc_impl.h L2ARC: Implement DWPD-based rate limiting with adaptive feed intervals 2026-02-04 10:07:07 -08:00
arc.h L2ARC: Implement per-device feed threads for parallel writes 2026-02-04 10:07:02 -08:00
asm_linkage.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
avl_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
avl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bitmap.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bitops.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
blake3.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
blkptr.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bplist.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bpobj.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bptree.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
bqueue.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
brt_impl.h BRT: Fix ranges to blocks conversion math 2025-11-10 13:58:39 -08:00
brt.h Add BRT support to zpool prefetch command 2025-11-10 16:16:22 -08:00
btree.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dataset_kstats.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dbuf.h Implement physical rewrites 2025-08-06 10:36:56 -07:00
ddt_impl.h DDT: Switch to using ZAP _by_dnode() interfaces 2025-12-15 09:49:14 -08:00
ddt.h DDT: Add locking for table ZAP destruction 2026-01-13 15:07:15 -08:00
dmu_impl.h dnode: remove dn_dirtyctx and dnode_dirtycontext 2025-08-21 06:05:38 -07:00
dmu_objset.h Relax special_small_blocks restrictions 2025-07-02 11:11:37 -07:00
dmu_recv.h cred: properly pass and test creds on other threads (#17273) 2025-04-29 16:27:48 -07:00
dmu_redact.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dmu_send.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dmu_traverse.h Allow physical rewrite without logical 2025-08-06 10:36:07 -07:00
dmu_tx.h dmu_tx: break tx assign/wait when pool suspends 2025-05-28 10:28:51 -07:00
dmu_zfetch.h Wire O_DIRECT also to Uncached I/O (#17218) 2025-05-13 14:26:55 -07:00
dmu.h Improve caching for dbuf prefetches 2026-02-04 10:12:32 -08:00
dnode.h dnode: remove dn_dirtyctx and dnode_dirtycontext 2025-08-21 06:05:38 -07:00
dsl_bookmark.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_crypt.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_dataset.h dsl_dataset: rename dmu_objset_clone* to dsl_dataset_clone* 2025-06-10 14:52:43 -07:00
dsl_deadlist.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_deleg.h ZFS allow send:encrypted 2025-09-12 09:53:31 -07:00
dsl_destroy.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_dir.h cred: properly pass and test creds on other threads (#17273) 2025-04-29 16:27:48 -07:00
dsl_pool.h Unified allocation throttling (#17020) 2025-03-24 09:25:01 -07:00
dsl_prop.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_scan.h Improve async destroy processing timing 2025-12-11 18:46:08 -08:00
dsl_synctask.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
dsl_userhold.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
edonr.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
efi_partition.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
frame.h Linux build: silence objtool warnings 2025-06-04 17:40:09 -07:00
hkdf.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
metaslab_impl.h range_tree: Provide more debug details upon unexpected add/remove 2025-07-31 10:44:42 -04:00
metaslab.h metaslab: don't pass whole zio to throttle reserve APIs 2025-07-04 23:22:22 -04:00
mmp.h mmp: claim sequence id before final import 2026-02-09 09:36:01 -08:00
mntent.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
multilist.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
nvpair_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
nvpair.h nvlist: Add nvlist_snprintf() and zfs_dbgmsg_nvlist() 2025-04-18 09:22:16 -04:00
objlist.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
pathname.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
qat.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
range_tree.h range_tree: drop duplicate zfs_ prefix from rs_set_fill_raw 2025-09-29 16:38:52 -07:00
rrwlock.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
sa_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
sa.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
sha2.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
skein.h SPDX: license tags: LicenseRef-OpenZFS-ThirdParty-PublicDomain 2025-03-13 17:57:31 -07:00
spa_checkpoint.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
spa_checksum.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
spa_impl.h mmp: claim sequence id before final import 2026-02-09 09:36:01 -08:00
spa_log_spacemap.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
spa.h mmp: add spa_load_name() for tryimport 2026-02-09 09:35:03 -08:00
space_map.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
space_reftree.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
sysevent.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
txg_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
txg.h txg_wait_synced_flags: add TXG_WAIT_SUSPEND flag to not wait if pool suspended 2025-05-28 10:27:46 -07:00
u8_textprep_data.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
u8_textprep.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
uberblock_impl.h mmp: claim sequence id before final import 2026-02-09 09:36:01 -08:00
uberblock.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
uio_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
unique.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
uuid.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_disk.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_draid.h Implement allocation size ranges and use for gang leaves (#17111) 2025-05-02 15:32:18 -07:00
vdev_file.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_impl.h Add knob to disable slow io notifications 2025-11-11 10:42:17 -08:00
vdev_indirect_births.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_indirect_mapping.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_initialize.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_raidz_impl.h Detect a slow raidz child during reads 2025-09-10 15:25:03 -07:00
vdev_raidz.h Detect a slow raidz child during reads 2025-09-10 15:25:03 -07:00
vdev_rebuild.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_removal.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev_trim.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
vdev.h mmp: claim sequence id before final import 2026-02-09 09:36:01 -08:00
xvattr.h Add support for FreeBSD's Solaris style extended attribute interface 2025-07-30 09:49:43 -07:00
zap_impl.h DDT: Add/use zap_lookup_length_uint64_by_dnode() 2025-12-15 14:38:34 -08:00
zap_leaf.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zap.h DDT: Add/use zap_lookup_length_uint64_by_dnode() 2025-12-15 14:38:34 -08:00
zcp_global.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zcp_iter.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zcp_prop.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zcp_set.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zcp.h cred: properly pass and test creds on other threads (#17273) 2025-04-29 16:27:48 -07:00
zfeature.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_acl.h libspl: move vattr and xvattr definitions from zfs_context.h 2025-11-12 10:00:24 -08:00
zfs_bootenv.h libzpool: add BE_POSIX_VENDOR for userspace bootenv 2025-11-12 10:03:07 -08:00
zfs_chksum.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_context.h zfs_context: remove duplicate includes 2025-11-12 10:04:03 -08:00
zfs_debug.h Rename several printf attributes declarations to __printf__ 2026-01-05 14:15:22 -08:00
zfs_delay.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_file.h Ensure 64-bit off_t is used in user space instead of loff_t 2025-12-10 09:45:39 -08:00
zfs_fuid.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_ioctl_impl.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_ioctl.h zinject: Introduce ready delay fault injection 2025-10-01 12:17:13 -07:00
zfs_onexit.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_project.h Linux 6.17 compat: Fix broken projectquota on 6.17 2025-11-05 16:22:03 -08:00
zfs_quota.h Show default quotas in zfs userspace tools 2025-04-03 10:36:45 -07:00
zfs_racct.h Wire O_DIRECT also to Uncached I/O (#17218) 2025-05-13 14:26:55 -07:00
zfs_ratelimit.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_refcount.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_rlock.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_sa.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_stat.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_sysfs.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_vfsops.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zfs_vnops.h Introduce zfs rewrite subcommand (#17246) 2025-05-12 10:22:17 -07:00
zfs_znode.h Prefer VERIFY0(n) over VERIFY(n == 0) 2025-08-07 11:40:59 -07:00
zil_impl.h ZIL: Make allocations more flexible 2025-08-14 08:50:17 -07:00
zil.h ZIL: add zil_commit_flags() to make honouring failmode= optional 2025-08-08 16:43:33 -07:00
zio_checksum.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zio_compress.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zio_crypt.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zio_impl.h ZIO: ZIO_STAGE_DDT_WRITE is a blocking stage 2025-12-10 19:51:53 -05:00
zio.h zinject: Introduce ready delay fault injection 2025-10-01 12:17:13 -07:00
zrlock.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zthr.h SPDX: license tags: CDDL-1.0 2025-03-13 17:56:27 -07:00
zvol_impl.h zvol_remove_minors_impl: remove all async fallbacks 2025-08-19 10:06:47 -07:00
zvol.h zvol: reject suspend attempts when zvol is shutting down 2025-09-03 11:13:09 -07:00