kernel/linux.git/drivers/md/dm-ima.c, branch v7.1

dm-ima: use SHA-256 library

2026-03-02T16:02:09+00:00

Make dm_ima_measure_on_table_load() use the SHA-256 library API instead of crypto_shash to calculate the SHA-256 hash value that it needs. This is simpler and more efficient. It also ensures that SHA-256 is actually available and doesn't fail due to the unreliable loading by name. While doing this, also use kasprintf() to simplify building the string version of the digest. Signed-off-by: Eric Biggers Signed-off-by: Mikulas Patocka

dm-ima: drop a useless argument

2025-08-19T09:12:50+00:00

The "gfp_t flags" is always GFP_KERNEL, so it can be removed. Signed-off-by: Mikulas Patocka

dm-ima: more strlen() drops

2025-08-19T09:12:49+00:00

Following commit ebbd17695e9e ("dm: ima: avoid extra calls to strlen()"), convert 'dm_ima_alloc_and_copy_capacity_str()' to return the number of characters emitted by 'scnprintf()' and simplify the users accordingly. Compile tested only. Signed-off-by: Dmitry Antipov Reviewed-by: Hou Tao Signed-off-by: Mikulas Patocka

dm: ima: avoid extra calls to strlen()

2025-06-27T11:07:17+00:00

Since 'scnprintf()' returns the number of characters emitted (not including the trailing '\0'), use that return value instead of the subsequent calls to 'strlen()' where appropriate. Compile tested only. Signed-off-by: Dmitry Antipov Signed-off-by: Mikulas Patocka

dm: avoid inline filenames

2023-02-14T19:23:07+00:00

Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer

dm: add missing SPDX-License-Indentifiers

2023-02-14T19:23:06+00:00

'GPL-2.0-only' is used instead of 'GPL-2.0' because SPDX has deprecated its use. Suggested-by: John Wiele Signed-off-by: Heinz Mauelshagen Signed-off-by: Mike Snitzer

dm table: audit all dm_table_get_target() callers

2022-07-07T15:49:34+00:00

All callers of dm_table_get_target() are expected to do proper bounds checking on the index they pass. Move dm_table_get_target() to dm-core.h to make it extra clear that only DM core code should be using it. Switch it to be inlined while at it. Standardize all DM core callers to use the same for loop pattern and make associated variables as local as possible. Rename some variables (e.g. s/table/t/ and s/tgt/ti/) along the way. Signed-off-by: Mike Snitzer

dm table: remove dm_table_get_num_targets() wrapper

2022-07-07T15:49:33+00:00

More efficient and readable to just access table->num_targets directly. Suggested-by: Linus Torvalds Signed-off-by: Mike Snitzer

dm ima: fix wrong length calculation for no_data string

2022-02-22T15:42:41+00:00

All entries measured by dm ima are prefixed by a version string (dm_version=N.N.N). When there is no data to measure, the entire buffer is overwritten with a string containing the version string again and the length of that string is added to the length of the version string. The new length is now wrong because it contains the version string twice. This caused entries like this: dm_version=4.45.0;name=test,uuid=test;table_clear=no_data; \ \x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00 \ current_device_capacity=204808; Signed-off-by: Thore Sommer Signed-off-by: Mike Snitzer

mm: don't include in

2021-10-18T12:17:01+00:00

There is no need to pull blk-cgroup.h and thus blkdev.h in here, so break the include chain. Signed-off-by: Christoph Hellwig Reviewed-by: Johannes Thumshirn Link: https://lore.kernel.org/r/20210920123328.1399408-3-hch@lst.de Signed-off-by: Jens Axboe