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5c56591b57
mirror_zfs/module/zfs
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Rich Ercolani 5c56591b57 Handle partial reads in zfs_read 
Currently, dmu_read_uio_dnode can read 64K of a requested 1M in one
loop, get EFAULT back from zfs_uiomove() (because the iovec only holds
64k), and return EFAULT, which turns into EAGAIN on the way out. EAGAIN
gets interpreted as "I didn't read anything", the caller tries again
without consuming the 64k we already read, and we're stuck.

This apparently works on newer kernels because the caller which breaks
on older Linux kernels by happily passing along a 1M read request and a
64k iovec just requests 64k at a time.

With this, we now won't return EFAULT if we got a partial read.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #12370
Closes #12509
Closes #12516
2022-08-02 10:05:14 -07:00
..
abd.c Avoid small buffer copying on write 2022-07-26 10:10:37 -07:00
aggsum.c More aggsum optimizations 2021-06-09 13:05:34 -07:00
arc.c Avoid small buffer copying on write 2022-07-26 10:10:37 -07:00
blkptr.c
bplist.c
bpobj.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
bptree.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
bqueue.c
btree.c Several B-tree optimizations 2022-07-26 10:10:37 -07:00
dataset_kstats.c Introduce write-mostly sums 2021-06-09 13:05:34 -07:00
dbuf_stats.c Reduce dbuf_find() lock contention 2022-05-06 12:02:45 -07:00
dbuf.c Fix -Wuse-after-free warning in dbuf_destroy() 2022-07-27 13:38:56 -07:00
ddt_zap.c
ddt.c Tinker with slop space accounting with dedup 2021-09-14 12:38:05 -07:00
dmu_diff.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_object.c
dmu_objset.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_recv.c Receive checks should allow unencrypted child datasets 2022-02-16 17:58:55 -08:00
dmu_redact.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_send.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_traverse.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dmu_tx.c Annotated dprintf as printf-like 2021-06-24 13:12:36 -07:00
dmu_zfetch.c More speculative prefetcher improvements 2022-07-26 10:10:37 -07:00
dmu.c Default to zfs_dmu_offset_next_sync=1 2022-04-01 09:59:47 -07:00
dnode_sync.c Report dnodes with faulty bonuslen 2022-02-16 17:58:55 -08:00
dnode.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dsl_bookmark.c Fix -Wattribute-warning in dsl layer 2022-07-27 13:38:56 -07:00
dsl_crypt.c Introduce a flag to skip comparing the local mac when raw sending 2022-02-04 16:14:56 -08:00
dsl_dataset.c Remove unneeded "extern inline" function declarations 2022-02-16 17:58:56 -08:00
dsl_deadlist.c Livelist logic should handle dedup blkptrs 2021-06-09 13:05:34 -07:00
dsl_deleg.c
dsl_destroy.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dsl_dir.c Fix ENOSPC when unlinking multiple files from full pool 2022-03-08 11:46:03 -08:00
dsl_pool.c Fix and disable blocks statistics during scrub 2022-07-26 10:10:37 -07:00
dsl_prop.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dsl_scan.c Fix scrub resume from newly created hole. 2022-07-26 10:10:37 -07:00
dsl_synctask.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
dsl_userhold.c
edonr_zfs.c
fm.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
gzip.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
hkdf.c
lz4.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
lzjb.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
Makefile.in
metaslab.c Improve mg_aliquot math 2022-07-26 10:10:37 -07:00
mmp.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
multilist.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
objlist.c
pathname.c
range_tree.c Several sorted scrub optimizations 2022-07-26 10:10:37 -07:00
refcount.c Export minimal zfs_refcount interfaces 2022-04-06 10:29:00 -07:00
rrwlock.c
sa.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
sha256.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
skein_zfs.c
spa_boot.c
spa_checkpoint.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
spa_config.c Cleaning up uio headers 2021-02-20 20:16:50 -08:00
spa_errlog.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
spa_history.c Annotated dprintf as printf-like 2021-06-24 13:12:36 -07:00
spa_log_spacemap.c Improve log spacemap load time 2022-07-26 10:10:37 -07:00
spa_misc.c Remove refcount from spa_config_*() 2022-07-26 10:10:37 -07:00
spa_stats.c Remove pool io kstats 2021-06-10 10:50:16 -07:00
spa.c Improve log spacemap load time 2022-07-26 10:10:37 -07:00
space_map.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
space_reftree.c
THIRDPARTYLICENSE.cityhash
THIRDPARTYLICENSE.cityhash.descrip
txg.c Annotated dprintf as printf-like 2021-06-24 13:12:36 -07:00
uberblock.c
unique.c
vdev_cache.c
vdev_draid_rand.c
vdev_draid.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev_indirect_births.c
vdev_indirect_mapping.c
vdev_indirect.c module/zfs: vdev_indirect: vdev_indirect_repair: remove unused variable 2022-05-02 15:42:58 -07:00
vdev_initialize.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev_label.c Use fallthrough macro 2021-11-02 09:50:30 -07:00
vdev_mirror.c Avoid memory copies during mirror scrub 2022-07-26 10:10:37 -07:00
vdev_missing.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev_queue.c Avoid vq_lock drop in vdev_queue_aggregate() 2021-09-14 14:31:22 -07:00
vdev_raidz_math_aarch64_neon_common.h
vdev_raidz_math_aarch64_neon.c
vdev_raidz_math_aarch64_neonx2.c
vdev_raidz_math_avx2.c
vdev_raidz_math_avx512bw.c
vdev_raidz_math_avx512f.c
vdev_raidz_math_impl.h
vdev_raidz_math_powerpc_altivec_common.h
vdev_raidz_math_powerpc_altivec.c
vdev_raidz_math_scalar.c Use fallthrough macro 2021-11-02 09:50:30 -07:00
vdev_raidz_math_sse2.c
vdev_raidz_math_ssse3.c
vdev_raidz_math.c Initialize parity blocks before RAID-Z reconstruction benchmarking 2021-09-14 14:32:16 -07:00
vdev_raidz.c Avoid memory copy when verifying raidz/draid parity 2022-07-26 10:10:37 -07:00
vdev_rebuild.c Use dsl_scan_setup_check() to setup a scrub 2021-04-14 13:19:49 -07:00
vdev_removal.c Improve log spacemap load time 2022-07-26 10:10:37 -07:00
vdev_root.c
vdev_trim.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
vdev.c Improve log spacemap load time 2022-07-26 10:10:37 -07:00
zap_leaf.c Remove unneeded "extern inline" function declarations 2022-02-16 17:58:56 -08:00
zap_micro.c Remove unneeded "extern inline" function declarations 2022-02-16 17:58:56 -08:00
zap.c Remove unneeded "extern inline" function declarations 2022-02-16 17:58:56 -08:00
zcp_get.c
zcp_global.c
zcp_iter.c
zcp_set.c
zcp_synctask.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zcp.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zfeature.c
zfs_byteswap.c
zfs_fm.c fm: remove unused variables 2022-05-02 15:42:58 -07:00
zfs_fuid.c Fix regression in POSIX mode behavior 2021-03-19 22:50:46 -07:00
zfs_ioctl.c file reference counts can get corrupted 2021-09-14 12:37:38 -07:00
zfs_log.c Fix -Wattribute-warning in zfs_log_xvattr() 2022-07-27 13:38:56 -07:00
zfs_onexit.c file reference counts can get corrupted 2021-09-14 12:37:38 -07:00
zfs_quota.c
zfs_ratelimit.c
zfs_replay.c Use fallthrough macro 2021-11-02 09:50:30 -07:00
zfs_rlock.c
zfs_sa.c Extending FreeBSD UIO Struct 2021-01-20 21:27:30 -08:00
zfs_vnops.c Handle partial reads in zfs_read 2022-08-02 10:05:14 -07:00
zil.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zio_checksum.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zio_compress.c module: zfs: fix unused, remove argsused 2022-02-16 17:58:56 -08:00
zio_inject.c Optimize small random numbers generation 2021-09-14 12:10:17 -07:00
zio.c Fix scrub resume from newly created hole. 2022-07-26 10:10:37 -07:00
zle.c
zrlock.c
zthr.c Avoid memory allocations in the ARC eviction thread 2022-02-03 15:30:52 -08:00
zvol.c zvol: remove unused variable 2022-05-02 15:42:58 -07:00