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| author | Vivek Goyal <vgoyal@redhat.com> | 2020-02-28 17:34:54 +0100 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2020-04-03 04:15:03 +0200 |
| commit | cdf6cdcd3b99a99ea9ecc1b05d1d040d5a69a134 (patch) | |
| tree | 3cead6571d7db698580930a17654ee14b1fb7b47 /drivers/md/dm-log-writes.c | |
| parent | s390,dcssblk,dax: Add dax zero_page_range operation to dcssblk driver (diff) | |
| download | linux-cdf6cdcd3b99a99ea9ecc1b05d1d040d5a69a134.tar.xz linux-cdf6cdcd3b99a99ea9ecc1b05d1d040d5a69a134.zip | |
dm,dax: Add dax zero_page_range operation
This patch adds support for dax zero_page_range operation to dm targets.
Signed-off-by: Vivek Goyal <vgoyal@redhat.com>
Acked-by: Mike Snitzer <snitzer@redhat.com>
Link: https://lore.kernel.org/r/20200228163456.1587-5-vgoyal@redhat.com
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/md/dm-log-writes.c')
| -rw-r--r-- | drivers/md/dm-log-writes.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/drivers/md/dm-log-writes.c b/drivers/md/dm-log-writes.c index 99721c76225d..8ea20b56b4d6 100644 --- a/drivers/md/dm-log-writes.c +++ b/drivers/md/dm-log-writes.c @@ -994,10 +994,26 @@ static size_t log_writes_dax_copy_to_iter(struct dm_target *ti, return dax_copy_to_iter(lc->dev->dax_dev, pgoff, addr, bytes, i); } +static int log_writes_dax_zero_page_range(struct dm_target *ti, pgoff_t pgoff, + size_t nr_pages) +{ + int ret; + struct log_writes_c *lc = ti->private; + sector_t sector = pgoff * PAGE_SECTORS; + + ret = bdev_dax_pgoff(lc->dev->bdev, sector, nr_pages << PAGE_SHIFT, + &pgoff); + if (ret) + return ret; + return dax_zero_page_range(lc->dev->dax_dev, pgoff, + nr_pages << PAGE_SHIFT); +} + #else #define log_writes_dax_direct_access NULL #define log_writes_dax_copy_from_iter NULL #define log_writes_dax_copy_to_iter NULL +#define log_writes_dax_zero_page_range NULL #endif static struct target_type log_writes_target = { @@ -1016,6 +1032,7 @@ static struct target_type log_writes_target = { .direct_access = log_writes_dax_direct_access, .dax_copy_from_iter = log_writes_dax_copy_from_iter, .dax_copy_to_iter = log_writes_dax_copy_to_iter, + .dax_zero_page_range = log_writes_dax_zero_page_range, }; static int __init dm_log_writes_init(void) |