From e3290b9491ff5b7ee40f9e0a4c06821988a2a2bf Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Wed, 10 Feb 2021 17:38:30 -0500 Subject: [PATCH] dm: simplify target code conditional on CONFIG_BLK_DEV_ZONED Allow removal of CONFIG_BLK_DEV_ZONED conditionals in target_type definition of various targets. Suggested-by: Eric Biggers Signed-off-by: Mike Snitzer --- drivers/md/dm-crypt.c | 6 ++---- drivers/md/dm-flakey.c | 6 ++---- drivers/md/dm-linear.c | 7 ++----- include/linux/device-mapper.h | 16 ++++++++++++++-- 4 files changed, 20 insertions(+), 15 deletions(-) diff --git a/drivers/md/dm-crypt.c b/drivers/md/dm-crypt.c index ee20b58..ae0f0a4 100644 --- a/drivers/md/dm-crypt.c +++ b/drivers/md/dm-crypt.c @@ -3134,7 +3134,6 @@ static int crypt_ctr_optional(struct dm_target *ti, unsigned int argc, char **ar } #ifdef CONFIG_BLK_DEV_ZONED - static int crypt_report_zones(struct dm_target *ti, struct dm_report_zones_args *args, unsigned int nr_zones) { @@ -3145,7 +3144,8 @@ static int crypt_report_zones(struct dm_target *ti, return blkdev_report_zones(cc->dev->bdev, sector, nr_zones, dm_report_zones_cb, args); } - +#else +#define crypt_report_zones NULL #endif /* @@ -3580,10 +3580,8 @@ static struct target_type crypt_target = { .module = THIS_MODULE, .ctr = crypt_ctr, .dtr = crypt_dtr, -#ifdef CONFIG_BLK_DEV_ZONED .features = DM_TARGET_ZONED_HM, .report_zones = crypt_report_zones, -#endif .map = crypt_map, .status = crypt_status, .postsuspend = crypt_postsuspend, diff --git a/drivers/md/dm-flakey.c b/drivers/md/dm-flakey.c index 30c6bc1..b7fee99 100644 --- a/drivers/md/dm-flakey.c +++ b/drivers/md/dm-flakey.c @@ -469,6 +469,8 @@ static int flakey_report_zones(struct dm_target *ti, return blkdev_report_zones(fc->dev->bdev, sector, nr_zones, dm_report_zones_cb, args); } +#else +#define flakey_report_zones NULL #endif static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_fn fn, void *data) @@ -481,12 +483,8 @@ static int flakey_iterate_devices(struct dm_target *ti, iterate_devices_callout_ static struct target_type flakey_target = { .name = "flakey", .version = {1, 5, 0}, -#ifdef CONFIG_BLK_DEV_ZONED .features = DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO, .report_zones = flakey_report_zones, -#else - .features = DM_TARGET_PASSES_CRYPTO, -#endif .module = THIS_MODULE, .ctr = flakey_ctr, .dtr = flakey_dtr, diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index fc9c427..92db0f5 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -146,6 +146,8 @@ static int linear_report_zones(struct dm_target *ti, return blkdev_report_zones(lc->dev->bdev, sector, nr_zones, dm_report_zones_cb, args); } +#else +#define linear_report_zones NULL #endif static int linear_iterate_devices(struct dm_target *ti, @@ -227,14 +229,9 @@ static int linear_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, static struct target_type linear_target = { .name = "linear", .version = {1, 4, 0}, -#ifdef CONFIG_BLK_DEV_ZONED .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT | DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO, .report_zones = linear_report_zones, -#else - .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT | - DM_TARGET_PASSES_CRYPTO, -#endif .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h index 4758813..c98d847 100644 --- a/include/linux/device-mapper.h +++ b/include/linux/device-mapper.h @@ -93,9 +93,18 @@ typedef int (*dm_message_fn) (struct dm_target *ti, unsigned argc, char **argv, typedef int (*dm_prepare_ioctl_fn) (struct dm_target *ti, struct block_device **bdev); +#ifdef CONFIG_BLK_DEV_ZONED typedef int (*dm_report_zones_fn) (struct dm_target *ti, struct dm_report_zones_args *args, unsigned int nr_zones); +#else +/* + * Define dm_report_zones_fn so that targets can assign to NULL if + * CONFIG_BLK_DEV_ZONED disabled. Otherwise each target needs to do + * awkward #ifdefs in their target_type, etc. + */ +typedef int (*dm_report_zones_fn) (struct dm_target *dummy); +#endif /* * These iteration functions are typically used to check (and combine) @@ -187,9 +196,7 @@ struct target_type { dm_status_fn status; dm_message_fn message; dm_prepare_ioctl_fn prepare_ioctl; -#ifdef CONFIG_BLK_DEV_ZONED dm_report_zones_fn report_zones; -#endif dm_busy_fn busy; dm_iterate_devices_fn iterate_devices; dm_io_hints_fn io_hints; @@ -248,8 +255,13 @@ struct target_type { /* * Indicates that a target supports host-managed zoned block devices. */ +#ifdef CONFIG_BLK_DEV_ZONED #define DM_TARGET_ZONED_HM 0x00000040 #define dm_target_supports_zoned_hm(type) ((type)->features & DM_TARGET_ZONED_HM) +#else +#define DM_TARGET_ZONED_HM 0x00000000 +#define dm_target_supports_zoned_hm(type) (false) +#endif /* * A target handles REQ_NOWAIT -- 2.7.4