Correction (FEC) support that has been added to the DM verity target.
Google uses DM verity on all Android devices and it is believed that
this FEC support will enable DM verity to recover from storage
failures seen since DM verity was first deployed as part of Android.
- A stable fix for a race in the destruction of DM thin pool's workqueue
- A stable fix for hung IO if a DM snapshot copy hit an error
- A few small cleanups in DM core and DM persistent data.
- A couple DM thinp range discard improvements (address atomicity of
finding a range and the efficiency of discarding a partially mapped
thin device)
- Add ability to debug DM bufio leaks by recording stack trace when a
buffer is allocated. Upon detected leak the recorded stack is dumped.
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Merge tag 'dm-4.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer:
- The most significant set of changes this cycle is the Forward Error
Correction (FEC) support that has been added to the DM verity target.
Google uses DM verity on all Android devices and it is believed that
this FEC support will enable DM verity to recover from storage
failures seen since DM verity was first deployed as part of Android.
- A stable fix for a race in the destruction of DM thin pool's
workqueue
- A stable fix for hung IO if a DM snapshot copy hit an error
- A few small cleanups in DM core and DM persistent data.
- A couple DM thinp range discard improvements (address atomicity of
finding a range and the efficiency of discarding a partially mapped
thin device)
- Add ability to debug DM bufio leaks by recording stack trace when a
buffer is allocated. Upon detected leak the recorded stack is
dumped.
* tag 'dm-4.5-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm snapshot: fix hung bios when copy error occurs
dm thin: bump thin and thin-pool target versions
dm thin: fix race condition when destroying thin pool workqueue
dm space map metadata: remove unused variable in brb_pop()
dm verity: add ignore_zero_blocks feature
dm verity: add support for forward error correction
dm verity: factor out verity_for_bv_block()
dm verity: factor out structures and functions useful to separate object
dm verity: move dm-verity.c to dm-verity-target.c
dm verity: separate function for parsing opt args
dm verity: clean up duplicate hashing code
dm btree: factor out need_insert() helper
dm bufio: use BUG_ON instead of conditional call to BUG
dm bufio: store stacktrace in buffers to help find buffer leaks
dm bufio: return NULL to improve code clarity
dm block manager: cleanup code that prints stacktrace
dm: don't save and restore bi_private
dm thin metadata: make dm_thin_find_mapped_range() atomic
dm thin metadata: speed up discard of partially mapped volumes
03891f9c85