kernel/drivers/md/dm-log-userspace-base.c, branch linux-6.9.y

dm: update relevant MODULE_AUTHOR entries to latest dm-devel mailing list

2024-02-20T19:22:55Z

Signed-off-by: Mike Snitzer

dm log userspace: replace deprecated strncpy with strscpy

2023-10-23T17:02:48Z

`strncpy` is deprecated for use on NUL-terminated destination strings [1] and as such we should prefer more robust and less ambiguous string interfaces. `lc` is already zero-allocated: | lc = kzalloc(sizeof(*lc), GFP_KERNEL); ... as such, any future NUL-padding is superfluous. A suitable replacement is `strscpy` [2] due to the fact that it guarantees NUL-termination on the destination buffer without unnecessarily NUL-padding. Let's also go with the more idiomatic `dest, src, sizeof(dest)` pattern for destination buffers that the compiler can calculate the size for. Link: https://www.kernel.org/doc/html/latest/process/deprecated.html#strncpy-on-nul-terminated-strings [1] Link: https://manpages.debian.org/testing/linux-manual-4.8/strscpy.9.en.html [2] Link: https://github.com/KSPP/linux/issues/90 Reviewed-by: Kees Cook Signed-off-by: Justin Stitt Signed-off-by: Mike Snitzer

dm: avoid void function return statements

2023-02-14T19:23:07Z

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

dm: change "unsigned" to "unsigned int"

2023-02-14T19:23:06Z

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

dm: add missing SPDX-License-Indentifiers

2023-02-14T19:23:06Z

'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: update target status functions to support IMA measurement

2021-08-10T17:34:23Z

For device mapper targets to take advantage of IMA's measurement capabilities, the status functions for the individual targets need to be updated to handle the status_type_t case for value STATUSTYPE_IMA. Update status functions for the following target types, to log their respective attributes to be measured using IMA. 01. cache 02. crypt 03. integrity 04. linear 05. mirror 06. multipath 07. raid 08. snapshot 09. striped 10. verity For rest of the targets, handle the STATUSTYPE_IMA case by setting the measurement buffer to NULL. For IMA to measure the data on a given system, the IMA policy on the system needs to be updated to have the following line, and the system needs to be restarted for the measurements to take effect. /etc/ima/ima-policy measure func=CRITICAL_DATA label=device-mapper template=ima-buf The measurements will be reflected in the IMA logs, which are located at: /sys/kernel/security/integrity/ima/ascii_runtime_measurements /sys/kernel/security/integrity/ima/binary_runtime_measurements These IMA logs can later be consumed by various attestation clients running on the system, and send them to external services for attesting the system. The DM target data measured by IMA subsystem can alternatively be queried from userspace by setting DM_IMA_MEASUREMENT_FLAG with DM_TABLE_STATUS_CMD. Signed-off-by: Tushar Sugandhi Signed-off-by: Mike Snitzer

dm: convert to bioset_init()/mempool_init()

2018-05-30T21:33:32Z

Convert dm to embedded bio sets. Acked-by: Mike Snitzer Signed-off-by: Kent Overstreet Signed-off-by: Jens Axboe

dm: drop NULL test before kmem_cache_destroy() and mempool_destroy()

2015-10-31T23:06:00Z

Remove DM's unneeded NULL tests before calling these destroy functions, now that they check for NULL, thanks to these v4.3 commits: 3942d2991 ("mm/slab_common: allow NULL cache pointer in kmem_cache_destroy()") 4e3ca3e03 ("mm/mempool: allow NULL `pool' pointer in mempool_destroy()") The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // @@ expression x; @@ -if (x != NULL) \(kmem_cache_destroy\|mempool_destroy\|dma_pool_destroy\)(x); // Signed-off-by: Julia Lawall Signed-off-by: Mike Snitzer

dm log userspace base: fix compile warning

2015-04-15T16:10:20Z

This fixes up a compile warning [-Wunused-but-set-variable] - given the comment in userspace_set_region_sync() the non-reporting of errors is intentional so the return value can be dropped to make gcc happy. Also, fix typo in comment. Signed-off-by: Nicholas Mc Guire Signed-off-by: Mike Snitzer

dm log userspace: split flush_entry_pool to be per dirty-log

2015-03-31T16:03:47Z

Use a single slab cache to allocate a mempool for each dirty-log. This _should_ eliminate DM's need for io_schedule_timeout() in mempool_alloc(); so io_schedule() should be sufficient now. Also, rename struct flush_entry to dm_dirty_log_flush_entry to allow KMEM_CACHE() to create a meaningful global name for the slab cache. Also, eliminate some holes in struct log_c by rearranging members. Signed-off-by: Mike Snitzer Acked-by: Heinz Mauelshagen