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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-13 21:58:09 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2022-12-13 21:58:09 +0300 |
| commit | 8715c6d3100fc7c6edddf29af4a399a1c12d028c (patch) | |
| tree | 084555960802704156e231313a143837a4e86098 /Documentation | |
| parent | 8ecd28b7a3a4c43a875a8840851f72468a2ca1d7 (diff) | |
| parent | 7991dbff6849f67e823b7cc0c15e5a90b0549b9f (diff) | |
| download | linux-8715c6d3100fc7c6edddf29af4a399a1c12d028c.tar.xz | |
Merge tag 'for-6.2/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm
Pull device mapper updates from Mike Snitzer:
- Fix use-after-free races due to missing resource cleanup during DM
target destruction in DM targets: thin-pool, cache, integrity and
clone.
- Fix ABBA deadlocks in DM thin-pool and cache targets due to their use
of a bufio client (that has a shrinker whose locking can cause the
incorrect locking order).
- Fix DM cache target to set its needs_check flag after first aborting
the metadata (whereby using reset persistent-data objects to update
the superblock with, otherwise the superblock update could be dropped
due to aborting metadata). This was found with code-inspection when
comparing with the equivalent in DM thinp code.
- Fix DM thin-pool's presume to continue resuming the device even if
the pool in is fail mode -- otherwise bios may never be failed up the
IO stack (which will prevent resetting the thin-pool target via table
reload)
- Fix DM thin-pool's metadata to use proper btree root (from previous
transaction) if metadata commit failed.
- Add 'waitfor' module param to DM module (dm_mod) to allow dm-init to
wait for the specified device before continuing with its DM target
initialization.
* tag 'for-6.2/dm-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm:
dm thin: Use last transaction's pmd->root when commit failed
dm init: add dm-mod.waitfor to wait for asynchronously probed block devices
dm ioctl: fix a couple ioctl codes
dm ioctl: a small code cleanup in list_version_get_info
dm thin: resume even if in FAIL mode
dm cache: set needs_check flag after aborting metadata
dm cache: Fix ABBA deadlock between shrink_slab and dm_cache_metadata_abort
dm thin: Fix ABBA deadlock between shrink_slab and dm_pool_abort_metadata
dm integrity: Fix UAF in dm_integrity_dtr()
dm cache: Fix UAF in destroy()
dm clone: Fix UAF in clone_dtr()
dm thin: Fix UAF in run_timer_softirq()
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/admin-guide/device-mapper/dm-init.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/admin-guide/device-mapper/dm-init.rst b/Documentation/admin-guide/device-mapper/dm-init.rst index e5242ff17e9b..981d6a907699 100644 --- a/Documentation/admin-guide/device-mapper/dm-init.rst +++ b/Documentation/admin-guide/device-mapper/dm-init.rst @@ -123,3 +123,11 @@ Other examples (per target): 0 1638400 verity 1 8:1 8:2 4096 4096 204800 1 sha256 fb1a5a0f00deb908d8b53cb270858975e76cf64105d412ce764225d53b8f3cfd 51934789604d1b92399c52e7cb149d1b3a1b74bbbcb103b2a0aaacbed5c08584 + +For setups using device-mapper on top of asynchronously probed block +devices (MMC, USB, ..), it may be necessary to tell dm-init to +explicitly wait for them to become available before setting up the +device-mapper tables. This can be done with the "dm-mod.waitfor=" +module parameter, which takes a list of devices to wait for:: + + dm-mod.waitfor=<device1>[,..,<deviceN>] |