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2a493a4c71
mirror_zfs/module/zfs
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Richard Yao 2a493a4c71
Fix unchecked return values and unused return values 
Coverity complained about unchecked return values and unused values that
turned out to be unused return values.

Different approaches were used to handle the different cases of
unchecked return values:

* cmd/zdb/zdb.c: VERIFY0 was used in one place since the existing code
  had no error handling. An error message was printed in another to
  match the rest of the code.

* cmd/zed/agents/zfs_retire.c: We dismiss the return value with `(void)`
  because the value is expected to be potentially unset.

* cmd/zpool_influxdb/zpool_influxdb.c: We dismiss the return value with
  `(void)` because the values are expected to be potentially unset.

* cmd/ztest.c: VERIFY0 was used since we want failures if something goes
  wrong in ztest.

* module/zfs/dsl_dir.c: We dismiss the return value with `(void)`
  because there is no guarantee that the zap entry will always be there.
  For example, old pools imported readonly would not have it and we do
  not want to fail here because of that.

* module/zfs/zfs_fm.c: `fnvlist_add_*()` was used since the
  allocations sleep and thus can never fail.

* module/zfs/zvol.c: We dismiss the return value with `(void)` because
  we do not need it. This matches what is already done in the analogous
  `zfs_replay_write2()`.

* tests/zfs-tests/cmd/draid.c: We suppress one return value with
  `(void)` since the code handles errors already. The other return value
  is handled by switching to `fnvlist_lookup_uint8_array()`.

* tests/zfs-tests/cmd/file/file_fadvise.c: We add error handling.

* tests/zfs-tests/cmd/mmap_sync.c: We add error handling for munmap, but
  ignore failures on remove() with (void) since it is expected to be
  able to fail.

* tests/zfs-tests/cmd/mmapwrite.c: We add error handling.

As for unused return values, they were all in places where there was
error handling, so logic was added to handle the return values.

Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #13920
2022-09-23 16:52:03 -07:00
..
abd.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
aggsum.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
arc.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
blake3_zfs.c Fix memory allocation issue for BLAKE3 context 2022-06-21 14:32:09 -07:00
blkptr.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
bplist.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bpobj.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bptree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
bqueue.c zfs recv hangs if max recordsize is less than received recordsize 2022-09-16 13:52:25 -07:00
btree.c Add zfs_btree_verify_intensity kernel module parameter 2022-09-15 16:22:33 -07:00
dataset_kstats.c Add support for per dataset zil stats and use wmsum counters 2022-07-20 17:14:06 -07:00
dbuf_stats.c Revert "Reduce dbuf_find() lock contention" 2022-09-22 12:59:41 -07:00
dbuf.c Dynamically size dbuf hash mutex array 2022-09-22 12:59:56 -07:00
ddt_zap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
ddt.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_diff.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_object.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_objset.c Revert "Avoid panic with recordsize > 128k, raw sending and no large_blocks" 2022-08-25 13:33:32 -07:00
dmu_recv.c Fix unchecked return values and unused return values 2022-09-23 16:52:03 -07:00
dmu_redact.c Fix incorrect size given to bqueue_enqueue() call in dmu_redact.c 2022-09-15 16:21:21 -07:00
dmu_send.c Revert "Avoid panic with recordsize > 128k, raw sending and no large_blocks" 2022-08-25 13:33:32 -07:00
dmu_traverse.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_tx.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu_zfetch.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dmu.c Implement a new type of zfs receive: corrective receive (-c) 2022-07-28 15:52:46 -07:00
dnode_sync.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dnode.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
dsl_bookmark.c Remaining {=> const} char|void *tag 2022-06-29 14:08:59 -07:00
dsl_crypt.c Fix zpool status in case of unloaded keys 2022-08-22 17:42:01 -07:00
dsl_dataset.c Fix unchecked return values and unused return values 2022-09-23 16:52:03 -07:00
dsl_deadlist.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_deleg.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_destroy.c Prevent zevent list from consuming all of kernel memory 2022-08-22 12:36:22 -07:00
dsl_dir.c Fix unchecked return values and unused return values 2022-09-23 16:52:03 -07:00
dsl_pool.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_prop.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_scan.c Cleanup: Change 1 used in bitshifts to 1ULL 2022-09-22 11:28:33 -07:00
dsl_synctask.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
dsl_userhold.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
edonr_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
fm.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
gzip.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
hkdf.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
lz4_zfs.c Updated the lz4 decompressor 2022-01-07 10:36:49 -08:00
lz4.c lz4: Cherrypick fix for CVE-2021-3520 2022-01-12 16:14:36 -08:00
lzjb.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
metaslab.c Cleanup: Change 1 used in bitshifts to 1ULL 2022-09-22 11:28:33 -07:00
mmp.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
multilist.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
objlist.c Implement Redacted Send/Receive 2019-06-19 09:48:12 -07:00
pathname.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
range_tree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
refcount.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
rrwlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sa.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
sha256.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
skein_zfs.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
spa_checkpoint.c Fix usage of zed_log_msg() and zfs_panic_recover() 2022-09-19 17:32:18 -07:00
spa_config.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_errlog.c Fix zpool status in case of unloaded keys 2022-08-22 17:42:01 -07:00
spa_history.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_log_spacemap.c Cleanup: Use OpenSolaris functions to call scheduler 2022-09-12 09:55:37 -07:00
spa_misc.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa_stats.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
spa.c Cleanup dead spa_boot code 2022-09-13 16:40:10 -07:00
space_map.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
space_reftree.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
THIRDPARTYLICENSE.cityhash OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
THIRDPARTYLICENSE.cityhash.descrip OpenZFS 8484 - Implement aggregate sum and use for arc counters 2018-06-06 09:35:59 -07:00
txg.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
uberblock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
unique.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_cache.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_draid_rand.c Distributed Spare (dRAID) Feature 2020-11-13 13:51:51 -08:00
vdev_draid.c vdev_draid_lookup_map() should not iterate outside draid_maps 2022-09-12 12:51:17 -07:00
vdev_indirect_births.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect_mapping.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_indirect.c Remove bcopy(), bzero(), bcmp() 2022-03-15 15:13:42 -07:00
vdev_initialize.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_label.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_mirror.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
vdev_missing.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_queue.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neon_common.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neon.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_aarch64_neonx2.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx2.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512bw.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_avx512f.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_impl.h Cleanup Raid-Z Typo fixes 2022-09-06 09:43:21 -07:00
vdev_raidz_math_powerpc_altivec_common.h Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_powerpc_altivec.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_scalar.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_sse2.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math_ssse3.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz_math.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_raidz.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
vdev_rebuild.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_removal.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_root.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev_trim.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
vdev.c Improve too large physical ashift handling 2022-09-08 10:30:53 -07:00
zap_leaf.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zap_micro.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zcp_get.c Add snapshots_changed as property 2022-08-02 16:45:30 -07:00
zcp_global.c OpenZFS 8600 - ZFS channel programs - snapshot 2018-02-08 15:29:24 -08:00
zcp_iter.c module/*.ko: prune .data, global .rodata 2022-01-14 15:37:55 -08:00
zcp_set.c Support setting user properties in a channel program 2020-02-14 13:41:42 -08:00
zcp_synctask.c Add zfs.sync.snapshot_rename 2022-09-02 13:31:19 -07:00
zcp.c Remaining {=> const} char|void *tag 2022-06-29 14:08:59 -07:00
zfeature.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_byteswap.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_chksum.c Fix BLAKE3 tuneable and module loading on Linux and FreeBSD 2022-09-16 14:25:53 -07:00
zfs_fm.c Fix unchecked return values and unused return values 2022-09-23 16:52:03 -07:00
zfs_fuid.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_ioctl.c Delay ZFS_PROP_SHARESMB property to handle it for encrypted raw receive 2022-09-20 15:19:05 -07:00
zfs_log.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_onexit.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_quota.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_ratelimit.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_replay.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_rlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_sa.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zfs_vnops.c zfs_enter rework 2022-09-16 13:36:47 -07:00
zil.c Add support for per dataset zil stats and use wmsum counters 2022-07-20 17:14:06 -07:00
zio_checksum.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio_compress.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio_inject.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zio.c Implement a new type of zfs receive: corrective receive (-c) 2022-07-28 15:52:46 -07:00
zle.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zrlock.c Replace dead opensolaris.org license link 2022-07-11 14:16:13 -07:00
zthr.c Switch from _Noreturn to __attribute__((noreturn)) 2022-03-23 08:51:00 -07:00
zvol.c Fix unchecked return values and unused return values 2022-09-23 16:52:03 -07:00