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authorArtur Paszkiewicz <artur.paszkiewicz@intel.com>2017-03-09 11:59:57 +0300
committerShaohua Li <shli@fb.com>2017-03-17 02:55:53 +0300
commitea0213e0c7cc1c1b52badf27bd7db4f50a67baaa (patch)
treecc45803ce7ac13964e38403e03f9ea06559fa5e0 /drivers/md/md.h
parenteffe6ee7523aa50d0517bd7da141e112b44d89fa (diff)
downloadlinux-ea0213e0c7cc1c1b52badf27bd7db4f50a67baaa.tar.xz
md: superblock changes for PPL
Include information about PPL location and size into mdp_superblock_1 and copy it to/from rdev. Because PPL is mutually exclusive with bitmap, put it in place of 'bitmap_offset'. Add a new flag MD_FEATURE_PPL for 'feature_map', analogically to MD_FEATURE_BITMAP_OFFSET. Add MD_HAS_PPL to mddev->flags to indicate that PPL is enabled on an array. Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com> Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md/md.h')
-rw-r--r--drivers/md/md.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 1c00160b09f9..a7b2f16452c4 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -122,6 +122,13 @@ struct md_rdev {
* sysfs entry */
struct badblocks badblocks;
+
+ struct {
+ short offset; /* Offset from superblock to start of PPL.
+ * Not used by external metadata. */
+ unsigned int size; /* Size in sectors of the PPL space */
+ sector_t sector; /* First sector of the PPL space */
+ } ppl;
};
enum flag_bits {
Faulty, /* device is known to have a fault */
@@ -226,6 +233,7 @@ enum mddev_flags {
* supported as calls to md_error() will
* never cause the array to become failed.
*/
+ MD_HAS_PPL, /* The raid array has PPL feature set */
};
enum mddev_sb_flags {