Commit 88ad5d1e authored by Mikulas Patocka's avatar Mikulas Patocka Committed by Mike Snitzer

dm integrity: update documentation

Update documentation with the "meta_device" parameter and flags.
Signed-off-by: default avatarMikulas Patocka <mpatocka@redhat.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
parent 893e3c39
...@@ -79,6 +79,10 @@ interleave_sectors:number ...@@ -79,6 +79,10 @@ interleave_sectors:number
a power of two. If the device is already formatted, the value from a power of two. If the device is already formatted, the value from
the superblock is used. the superblock is used.
meta_device:device
Don't interleave the data and metadata on on device. Use a
separate device for metadata.
buffer_sectors:number buffer_sectors:number
The number of sectors in one buffer. The value is rounded down to The number of sectors in one buffer. The value is rounded down to
a power of two. a power of two.
...@@ -167,7 +171,11 @@ The layout of the formatted block device: ...@@ -167,7 +171,11 @@ The layout of the formatted block device:
provides (i.e. the size of the device minus the size of all provides (i.e. the size of the device minus the size of all
metadata and padding). The user of this target should not send metadata and padding). The user of this target should not send
bios that access data beyond the "provided data sectors" limit. bios that access data beyond the "provided data sectors" limit.
* flags - a flag is set if journal_mac is used * flags
SB_FLAG_HAVE_JOURNAL_MAC - a flag is set if journal_mac is used
SB_FLAG_RECALCULATING - recalculating is in progress
* log2(sectors per block)
* a position where recalculating finished
* journal * journal
The journal is divided into sections, each section contains: The journal is divided into sections, each section contains:
* metadata area (4kiB), it contains journal entries * metadata area (4kiB), it contains journal entries
......
...@@ -3081,10 +3081,12 @@ static int create_journal(struct dm_integrity_c *ic, char **error) ...@@ -3081,10 +3081,12 @@ static int create_journal(struct dm_integrity_c *ic, char **error)
* buffer_sectors * buffer_sectors
* journal_watermark * journal_watermark
* commit_time * commit_time
* meta_device
* block_size
* internal_hash * internal_hash
* journal_crypt * journal_crypt
* journal_mac * journal_mac
* block_size * recalculate
*/ */
static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv) static int dm_integrity_ctr(struct dm_target *ti, unsigned argc, char **argv)
{ {
......
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