diff options
Diffstat (limited to 'drivers/md/dm-linear.c')
| -rw-r--r-- | drivers/md/dm-linear.c | 139 |
1 files changed, 61 insertions, 78 deletions
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c index ad980a38fb1e..73bf290af181 100644 --- a/drivers/md/dm-linear.c +++ b/drivers/md/dm-linear.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2001-2003 Sistina Software (UK) Limited. * @@ -60,19 +61,19 @@ static int linear_ctr(struct dm_target *ti, unsigned int argc, char **argv) ti->num_flush_bios = 1; ti->num_discard_bios = 1; ti->num_secure_erase_bios = 1; - ti->num_write_same_bios = 1; ti->num_write_zeroes_bios = 1; + ti->flush_bypasses_map = true; ti->private = lc; return 0; - bad: +bad: kfree(lc); return ret; } static void linear_dtr(struct dm_target *ti) { - struct linear_c *lc = (struct linear_c *) ti->private; + struct linear_c *lc = ti->private; dm_put_device(ti, lc->dev); kfree(lc); @@ -85,27 +86,21 @@ static sector_t linear_map_sector(struct dm_target *ti, sector_t bi_sector) return lc->start + dm_target_offset(ti, bi_sector); } -static void linear_map_bio(struct dm_target *ti, struct bio *bio) +int linear_map(struct dm_target *ti, struct bio *bio) { struct linear_c *lc = ti->private; bio_set_dev(bio, lc->dev->bdev); - if (bio_sectors(bio) || bio_op(bio) == REQ_OP_ZONE_RESET) - bio->bi_iter.bi_sector = - linear_map_sector(ti, bio->bi_iter.bi_sector); -} - -static int linear_map(struct dm_target *ti, struct bio *bio) -{ - linear_map_bio(ti, bio); + bio->bi_iter.bi_sector = linear_map_sector(ti, bio->bi_iter.bi_sector); return DM_MAPIO_REMAPPED; } static void linear_status(struct dm_target *ti, status_type_t type, - unsigned status_flags, char *result, unsigned maxlen) + unsigned int status_flags, char *result, unsigned int maxlen) { - struct linear_c *lc = (struct linear_c *) ti->private; + struct linear_c *lc = ti->private; + size_t sz = 0; switch (type) { case STATUSTYPE_INFO: @@ -113,15 +108,22 @@ static void linear_status(struct dm_target *ti, status_type_t type, break; case STATUSTYPE_TABLE: - snprintf(result, maxlen, "%s %llu", lc->dev->name, - (unsigned long long)lc->start); + DMEMIT("%s %llu", lc->dev->name, (unsigned long long)lc->start); + break; + + case STATUSTYPE_IMA: + DMEMIT_TARGET_NAME_VERSION(ti->type); + DMEMIT(",device_name=%s,start=%llu;", lc->dev->name, + (unsigned long long)lc->start); break; } } -static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev) +static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev, + unsigned int cmd, unsigned long arg, + bool *forward) { - struct linear_c *lc = (struct linear_c *) ti->private; + struct linear_c *lc = ti->private; struct dm_dev *dev = lc->dev; *bdev = dev->bdev; @@ -129,30 +131,23 @@ static int linear_prepare_ioctl(struct dm_target *ti, struct block_device **bdev /* * Only pass ioctls through if the device sizes match exactly. */ - if (lc->start || - ti->len != i_size_read(dev->bdev->bd_inode) >> SECTOR_SHIFT) + if (lc->start || ti->len != bdev_nr_sectors(dev->bdev)) return 1; return 0; } #ifdef CONFIG_BLK_DEV_ZONED -static int linear_report_zones(struct dm_target *ti, sector_t sector, - struct blk_zone *zones, unsigned int *nr_zones, - gfp_t gfp_mask) +static int linear_report_zones(struct dm_target *ti, + struct dm_report_zones_args *args, unsigned int nr_zones) { - struct linear_c *lc = (struct linear_c *) ti->private; - int ret; - - /* Do report and remap it */ - ret = blkdev_report_zones(lc->dev->bdev, linear_map_sector(ti, sector), - zones, nr_zones, gfp_mask); - if (ret != 0) - return ret; + struct linear_c *lc = ti->private; - if (*nr_zones) - dm_remap_zone_report(ti, lc->start, zones, nr_zones); - return 0; + return dm_report_zones(lc->dev->bdev, lc->start, + linear_map_sector(ti, args->next_sector), + args, nr_zones); } +#else +#define linear_report_zones NULL #endif static int linear_iterate_devices(struct dm_target *ti, @@ -163,66 +158,54 @@ static int linear_iterate_devices(struct dm_target *ti, return fn(ti, lc->dev, lc->start, ti->len, data); } -#if IS_ENABLED(CONFIG_DAX_DRIVER) -static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) +#if IS_ENABLED(CONFIG_FS_DAX) +static struct dax_device *linear_dax_pgoff(struct dm_target *ti, pgoff_t *pgoff) { - long ret; struct linear_c *lc = ti->private; - struct block_device *bdev = lc->dev->bdev; - struct dax_device *dax_dev = lc->dev->dax_dev; - sector_t dev_sector, sector = pgoff * PAGE_SECTORS; - - dev_sector = linear_map_sector(ti, sector); - ret = bdev_dax_pgoff(bdev, dev_sector, nr_pages * PAGE_SIZE, &pgoff); - if (ret) - return ret; - return dax_direct_access(dax_dev, pgoff, nr_pages, kaddr, pfn); + sector_t sector = linear_map_sector(ti, *pgoff << PAGE_SECTORS_SHIFT); + + *pgoff = (get_start_sect(lc->dev->bdev) + sector) >> PAGE_SECTORS_SHIFT; + return lc->dev->dax_dev; } -static size_t linear_dax_copy_from_iter(struct dm_target *ti, pgoff_t pgoff, - void *addr, size_t bytes, struct iov_iter *i) +static long linear_dax_direct_access(struct dm_target *ti, pgoff_t pgoff, + long nr_pages, enum dax_access_mode mode, void **kaddr, + unsigned long *pfn) { - struct linear_c *lc = ti->private; - struct block_device *bdev = lc->dev->bdev; - struct dax_device *dax_dev = lc->dev->dax_dev; - sector_t dev_sector, sector = pgoff * PAGE_SECTORS; - - dev_sector = linear_map_sector(ti, sector); - if (bdev_dax_pgoff(bdev, dev_sector, ALIGN(bytes, PAGE_SIZE), &pgoff)) - return 0; - return dax_copy_from_iter(dax_dev, pgoff, addr, bytes, i); + struct dax_device *dax_dev = linear_dax_pgoff(ti, &pgoff); + + return dax_direct_access(dax_dev, pgoff, nr_pages, mode, kaddr, pfn); +} + +static int linear_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, + size_t nr_pages) +{ + struct dax_device *dax_dev = linear_dax_pgoff(ti, &pgoff); + + return dax_zero_page_range(dax_dev, pgoff, nr_pages); } -static size_t linear_dax_copy_to_iter(struct dm_target *ti, pgoff_t pgoff, +static size_t linear_dax_recovery_write(struct dm_target *ti, pgoff_t pgoff, void *addr, size_t bytes, struct iov_iter *i) { - struct linear_c *lc = ti->private; - struct block_device *bdev = lc->dev->bdev; - struct dax_device *dax_dev = lc->dev->dax_dev; - sector_t dev_sector, sector = pgoff * PAGE_SECTORS; - - dev_sector = linear_map_sector(ti, sector); - if (bdev_dax_pgoff(bdev, dev_sector, ALIGN(bytes, PAGE_SIZE), &pgoff)) - return 0; - return dax_copy_to_iter(dax_dev, pgoff, addr, bytes, i); + struct dax_device *dax_dev = linear_dax_pgoff(ti, &pgoff); + + return dax_recovery_write(dax_dev, pgoff, addr, bytes, i); } #else #define linear_dax_direct_access NULL -#define linear_dax_copy_from_iter NULL -#define linear_dax_copy_to_iter NULL +#define linear_dax_zero_page_range NULL +#define linear_dax_recovery_write NULL #endif static struct target_type linear_target = { .name = "linear", - .version = {1, 4, 0}, -#ifdef CONFIG_BLK_DEV_ZONED - .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_ZONED_HM, + .version = {1, 5, 0}, + .features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT | + DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO | + DM_TARGET_ATOMIC_WRITES, .report_zones = linear_report_zones, -#else - .features = DM_TARGET_PASSES_INTEGRITY, -#endif .module = THIS_MODULE, .ctr = linear_ctr, .dtr = linear_dtr, @@ -231,8 +214,8 @@ static struct target_type linear_target = { .prepare_ioctl = linear_prepare_ioctl, .iterate_devices = linear_iterate_devices, .direct_access = linear_dax_direct_access, - .dax_copy_from_iter = linear_dax_copy_from_iter, - .dax_copy_to_iter = linear_dax_copy_to_iter, + .dax_zero_page_range = linear_dax_zero_page_range, + .dax_recovery_write = linear_dax_recovery_write, }; int __init dm_linear_init(void) |