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
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avl	AVL: Remove obsolete branching optimizations	2022-07-26 10:10:37 -07:00
icp	Fix objtool: missing int3 after ret warning	2022-07-27 13:38:56 -07:00
lua	module: lua: ldo: fix pragma name	2022-07-28 14:17:38 -07:00
nvpair	Update checkstyle workflow env to ubuntu-20.04	2021-12-08 13:27:56 -08:00
os	libtpool: -Wno-clobbered	2022-07-27 13:38:56 -07:00
spl	Cleanup linux module kbuild files	2020-06-10 09:24:15 -07:00
unicode	Update checkstyle workflow env to ubuntu-20.04	2021-12-08 13:27:56 -08:00
zcommon	Linux 5.16 compat: don't use XSTATE_XSAVE to save FPU state	2022-02-16 17:58:55 -08:00
zfs	Handle partial reads in zfs_read	2022-08-02 10:05:14 -07:00
zstd	module: zstd: check we don't leak symbols; regenerate symbol map	2022-05-16 15:48:21 -07:00
.gitignore	Cleanup linux module kbuild files	2020-06-10 09:24:15 -07:00
Kbuild.in	Add zstd support to zfs	2020-08-20 10:30:06 -07:00
Makefile.bsd	FreeBSD: Silence clang unused-but-set-variable	2022-06-15 11:27:28 -07:00
Makefile.in	Add support for $KERNEL_{CC,LD,LLVM} variables	2022-02-16 17:58:55 -08:00