kernel/git/stable/linux.git/drivers/md/dm-verity.c, branch master

dm verity: move dm-verity.c to dm-verity-target.c

2015-12-10T15:39:01+00:00

Prepare for extending dm-verity with an optional object. Follows the naming convention used by other DM targets (e.g. dm-cache and dm-era). Signed-off-by: Sami Tolvanen Signed-off-by: Mike Snitzer

dm verity: separate function for parsing opt args

2015-12-10T15:39:00+00:00

Move optional argument parsing into a separate function to make it easier to add more of them without making verity_ctr even longer. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Signed-off-by: Mike Snitzer

dm verity: clean up duplicate hashing code

2015-12-10T15:39:00+00:00

Handle dm-verity salting in one place to simplify the code. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Signed-off-by: Mike Snitzer

dm: don't save and restore bi_private

2015-12-10T15:38:56+00:00

Device mapper used the field bi_private to point to dm_target_io. However, since kernel 3.15, the bi_private field is unused, and so the targets do not need to save and restore this field. This patch removes code that saves and restores bi_private from dm-cache, dm-snapshot and dm-verity. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer

dm: refactor ioctl handling

2015-10-31T23:05:59+00:00

This moves the call to blkdev_ioctl and the argument checking to DM core code, and only leaves a callout to find the block device to operate on in the targets. This simplifies the code and allows us to pass through ioctl-like command using other methods in the next patch. Also split out a helper around calling the prepare_ioctl method that will be reused for persistent reservation handling. Signed-off-by: Christoph Hellwig Signed-off-by: Mike Snitzer

Merge tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm

2015-09-02T23:35:26+00:00

Pull device mapper update from Mike Snitzer: - a couple small cleanups in dm-cache, dm-verity, persistent-data's dm-btree, and DM core. - a 4.1-stable fix for dm-cache that fixes the leaking of deferred bio prison cells - a 4.2-stable fix that adds feature reporting for the dm-stats features added in 4.2 - improve DM-snapshot to not invalidate the on-disk snapshot if snapshot device write overflow occurs; but a write overflow triggered through the origin device will still invalidate the snapshot. - optimize DM-thinp's async discard submission a bit now that late bio splitting has been included in block core. - switch DM-cache's SMQ policy lock from using a mutex to a spinlock; improves performance on very low latency devices (eg. NVMe SSD). - document DM RAID 4/5/6's discard support [ I did not pull the slab changes, which weren't appropriate for this tree, and weren't obviously the right thing to do anyway. At the very least they need some discussion and explanation before getting merged. Because not pulling the actual tagged commit but doing a partial pull instead, this merge commit thus also obviously is missing the git signature from the original tag ] * tag 'dm-4.3-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/device-mapper/linux-dm: dm cache: fix use after freeing migrations dm cache: small cleanups related to deferred prison cell cleanup dm cache: fix leaking of deferred bio prison cells dm raid: document RAID 4/5/6 discard support dm stats: report precise_timestamps and histogram in @stats_list output dm thin: optimize async discard submission dm snapshot: don't invalidate on-disk image on snapshot write overflow dm: remove unlikely() before IS_ERR() dm: do not override error code returned from dm_get_device() dm: test return value for DM_MAPIO_SUBMITTED dm verity: remove unused mempool dm cache: move wake_waker() from free_migrations() to where it is needed dm btree remove: remove unused function get_nr_entries() dm btree: remove unused "dm_block_t root" parameter in btree_split_sibling() dm cache policy smq: change the mutex to a spinlock

block: kill merge_bvec_fn() completely

2015-08-13T18:31:57+00:00

As generic_make_request() is now able to handle arbitrarily sized bios, it's no longer necessary for each individual block driver to define its own ->merge_bvec_fn() callback. Remove every invocation completely. Cc: Jens Axboe Cc: Lars Ellenberg Cc: drbd-user@lists.linbit.com Cc: Jiri Kosina Cc: Yehuda Sadeh Cc: Sage Weil Cc: Alex Elder Cc: ceph-devel@vger.kernel.org Cc: Alasdair Kergon Cc: Mike Snitzer Cc: dm-devel@redhat.com Cc: Neil Brown Cc: linux-raid@vger.kernel.org Cc: Christoph Hellwig Cc: "Martin K. Petersen" Acked-by: NeilBrown (for the 'md' bits) Acked-by: Mike Snitzer Signed-off-by: Kent Overstreet [dpark: also remove ->merge_bvec_fn() in dm-thin as well as dm-era-target, and resolve merge conflicts] Signed-off-by: Dongsu Park Signed-off-by: Ming Lin Signed-off-by: Jens Axboe

dm: remove unlikely() before IS_ERR()

2015-08-12T15:32:21+00:00

IS_ERR() already contains an 'unlikely' compiler flag so there is no need to do that again from IS_ERR() callers. Signed-off-by: Viresh Kumar Signed-off-by: Mike Snitzer

dm verity: remove unused mempool

2015-08-12T15:32:20+00:00

Since commit 003b5c571 ("block: Convert drivers to immutable biovecs"), vec_mempool in struct dm_verity is no longer used. Remove it and related definitions. Signed-off-by: Sami Tolvanen Signed-off-by: Mike Snitzer

block: add a bi_error field to struct bio

2015-07-29T14:55:15+00:00

Currently we have two different ways to signal an I/O error on a BIO: (1) by clearing the BIO_UPTODATE flag (2) by returning a Linux errno value to the bi_end_io callback The first one has the drawback of only communicating a single possible error (-EIO), and the second one has the drawback of not beeing persistent when bios are queued up, and are not passed along from child to parent bio in the ever more popular chaining scenario. Having both mechanisms available has the additional drawback of utterly confusing driver authors and introducing bugs where various I/O submitters only deal with one of them, and the others have to add boilerplate code to deal with both kinds of error returns. So add a new bi_error field to store an errno value directly in struct bio and remove the existing mechanisms to clean all this up. Signed-off-by: Christoph Hellwig Reviewed-by: Hannes Reinecke Reviewed-by: NeilBrown Signed-off-by: Jens Axboe