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Please consider pulling these changes from the signed vfs-7.4-rc1.iomap tag.
Thanks!
Christian
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Merge tag 'vfs-7.4-rc1.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs
Pull iomap updates from Christian Brauner:
"This contains the iomap changes for this cycle.
The bulk is lazy bounce buffering for checksummed reads. XFS bounce
buffers every direct read on a device that requires stable pages for
checksumming so that userspace modifying the buffer while the read is
in flight can't corrupt the data and fail the checksum.
That burns DRAM bandwidth and CPU for copies that are almost never
needed and, since the bounce buffer was a bio_vec, produced smaller
and unaligned I/Os with 4k pages, i.e. 1 MB minus 4k.
Now the read goes to the user buffer first and only a checksum failure
allocates a bounce buffer and reads again. Integrity verification
moves out of iomap into the filesystem so it can handle errors its own
way, T10 PI handling for direct I/O moves into ->submit_io() to match
buffered I/O, and a sysfs knob restores the old behaviour for the rare
application that really does modify in-flight buffers.
The block side gains bio_prepare_reissue(), exports
fs_bio_integrity_{alloc,free}(), caps atomic writes by the PI buffer
size and fixes an integer overflow in max_integrity_io_size() and a PI
verification bug with an initial bvec offset. The old read side bounce
buffering in the block layer is removed. This is a branch shared with
the block tree and may also reach you through the block pull request.
Three error handling regressions are fixed:
- A failed ->writeback_submit() left wpc->wb_ctx pointing at an
already completed ioend which was then submitted a second time and
corrupted ip->i_ioend_list on XFS
- iomap_fiemap() lost an iteration error when it flushed the pending
extent and marked a truncated list as complete
- A failed direct I/O bio lost its error when the sub-block tail
zeroing succeeded. An XFS error tag to inject the writeback failure
comes with it.
iomap_dio_hole_iter() respects the block size alignment when
iov_iter_zero() stops short at a page boundary, which btrfs with 8k
blocks on 4k pages hit as an assertion since it disables page faults
during direct I/O. The homegrown deferral of error completions to task
context is replaced with bio_complete_in_task(). Plus an unused
parameter, two typo fixes and a kernel-doc fix"
* tag 'vfs-7.4-rc1.iomap' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (34 commits)
fs/iomap: document ret parameter of iomap_iter_continue
iomap: follow the alignment requirement for iomap_dio_hole_iter()
iomap: don't lose a failed direct I/O bio's error when zeroing the tail
iomap: don't lose a fiemap iteration error when emitting the last extent
xfs: add an error tag to inject a ->writeback_submit() failure
iomap: don't resubmit an ioend after ->writeback_submit() failed
iomap: use bio_complete_in_task for buffered simple dio read failures
iomap: use bio_complete_in_task for buffered write failures
iomap: use bio_complete_in_task for buffered read failures
block,iomap: remove the old read side bounce buffering support
xfs: log a message at mount time when using integrity protection
xfs: add error injection for lazy bounce buffering
xfs: add support for lazy direct read bounce buffering
iomap,xfs: move integrity verification to the file system
xfs: use BIO_COMPLETE_IN_TASK for bounce buffered read I/Os
iomap: better read bounce buffering support
block,iomap: fix protection information verification with initial bvec offset
xfs: move PI generation into xfs_submit_zoned_bio
iomap,xfs: move T10 PI handling for direct I/O into ->submit_io
iomap: add a IOMAP_IOEND_INTEGRITY flag
...
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|---|---|---|
| .. | ||
| partitions | ||
| badblocks.c | ||
| bdev.c | ||
| bfq-cgroup.c | ||
| bfq-iosched.c | ||
| bfq-iosched.h | ||
| bfq-wf2q.c | ||
| bio-integrity-auto.c | ||
| bio-integrity-fs.c | ||
| bio-integrity.c | ||
| bio.c | ||
| blk-cgroup-fc-appid.c | ||
| blk-cgroup-rwstat.c | ||
| blk-cgroup-rwstat.h | ||
| blk-cgroup.c | ||
| blk-cgroup.h | ||
| blk-core.c | ||
| blk-crypto-fallback.c | ||
| blk-crypto-internal.h | ||
| blk-crypto-profile.c | ||
| blk-crypto-sysfs.c | ||
| blk-crypto.c | ||
| blk-flush.c | ||
| blk-ia-ranges.c | ||
| blk-integrity.c | ||
| blk-ioc.c | ||
| blk-iocost.c | ||
| blk-iolatency.c | ||
| blk-ioprio.c | ||
| blk-ioprio.h | ||
| blk-lib.c | ||
| blk-map.c | ||
| blk-merge.c | ||
| blk-mq-cpumap.c | ||
| blk-mq-debugfs.c | ||
| blk-mq-debugfs.h | ||
| blk-mq-dma.c | ||
| blk-mq-sched.c | ||
| blk-mq-sched.h | ||
| blk-mq-sysfs.c | ||
| blk-mq-tag.c | ||
| blk-mq.c | ||
| blk-mq.h | ||
| blk-pm.c | ||
| blk-pm.h | ||
| blk-rq-qos.c | ||
| blk-rq-qos.h | ||
| blk-settings.c | ||
| blk-stat.c | ||
| blk-stat.h | ||
| blk-sysfs.c | ||
| blk-throttle.c | ||
| blk-throttle.h | ||
| blk-timeout.c | ||
| blk-wbt.c | ||
| blk-wbt.h | ||
| blk-zoned.c | ||
| blk.h | ||
| bsg-lib.c | ||
| bsg.c | ||
| disk-events.c | ||
| early-lookup.c | ||
| elevator.c | ||
| elevator.h | ||
| error-injection.c | ||
| error-injection.h | ||
| fops.c | ||
| genhd.c | ||
| holder.c | ||
| ioctl.c | ||
| ioprio.c | ||
| Kconfig | ||
| Kconfig.iosched | ||
| kyber-iosched.c | ||
| Makefile | ||
| mq-deadline.c | ||
| opal_proto.h | ||
| sed-opal.c | ||
| t10-pi.c | ||