summaryrefslogtreecommitdiff
path: root/drivers/md/dm-linear.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/md/dm-linear.c')
-rw-r--r--drivers/md/dm-linear.c120
1 files changed, 47 insertions, 73 deletions
diff --git a/drivers/md/dm-linear.c b/drivers/md/dm-linear.c
index c91f1e2e2f65..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) || op_is_zone_mgmt(bio_op(bio)))
- 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;
@@ -129,8 +131,7 @@ 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;
}
@@ -157,79 +158,53 @@ 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);
-static size_t linear_dax_copy_from_iter(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_from_iter(dax_dev, pgoff, addr, bytes, i);
+ *pgoff = (get_start_sect(lc->dev->bdev) + sector) >> PAGE_SECTORS_SHIFT;
+ return lc->dev->dax_dev;
}
-static size_t linear_dax_copy_to_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_to_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)
{
- int 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_SHIFT, &pgoff);
- if (ret)
- return ret;
+ 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_recovery_write(struct dm_target *ti, pgoff_t pgoff,
+ void *addr, size_t bytes, struct iov_iter *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},
+ .version = {1, 5, 0},
.features = DM_TARGET_PASSES_INTEGRITY | DM_TARGET_NOWAIT |
- DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO,
+ DM_TARGET_ZONED_HM | DM_TARGET_PASSES_CRYPTO |
+ DM_TARGET_ATOMIC_WRITES,
.report_zones = linear_report_zones,
.module = THIS_MODULE,
.ctr = linear_ctr,
@@ -239,9 +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)
generated by cgit (git 2.34.1) at 2025-12-24 19:34:44 +0000