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| author | Artur Paszkiewicz <artur.paszkiewicz@intel.com> | 2017-03-29 11:54:15 +0200 |
|---|---|---|
| committer | Jes Sorensen <Jes.Sorensen@gmail.com> | 2017-03-29 11:32:15 -0400 |
| commit | 5308f11727b889965efe5ac0e854d197c2b51f6d (patch) | |
| tree | 9b35204d86ddc3bf3275c123b4a420dda57c02a8 /mdadm.h | |
| parent | b4decd517d90098bc2d17d3eddfe858d8b903920 (diff) | |
| download | mdadm-5308f11727b889965efe5ac0e854d197c2b51f6d.tar.gz | |
Generic support for --consistency-policy and PPL
Add a new parameter to mdadm: --consistency-policy=. It determines how
the array maintains consistency in case of unexpected shutdown. This
maps to the md sysfs attribute 'consistency_policy'. It can be used to
create a raid5 array using PPL. Add the necessary plumbing to pass this
option to metadata handlers. The write journal and bitmap
functionalities are treated as different policies, which are implicitly
selected when using --write-journal or --bitmap options.
Signed-off-by: Artur Paszkiewicz <artur.paszkiewicz@intel.com>
Signed-off-by: Jes Sorensen <Jes.Sorensen@gmail.com>
Diffstat (limited to 'mdadm.h')
| -rw-r--r-- | mdadm.h | 21 |
1 files changed, 18 insertions, 3 deletions
@@ -279,6 +279,15 @@ struct mdinfo { int journal_device_required; int journal_clean; + enum { + CONSISTENCY_POLICY_UNKNOWN, + CONSISTENCY_POLICY_NONE, + CONSISTENCY_POLICY_RESYNC, + CONSISTENCY_POLICY_BITMAP, + CONSISTENCY_POLICY_JOURNAL, + CONSISTENCY_POLICY_PPL, + } consistency_policy; + /* During reshape we can sometimes change the data_offset to avoid * over-writing still-valid data. We need to know if there is space. * So getinfo_super will fill in space_before and space_after in sectors. @@ -426,6 +435,7 @@ enum special_options { ClusterName, ClusterConfirm, WriteJournal, + ConsistencyPolicy, }; enum prefix_standard { @@ -527,6 +537,7 @@ struct shape { int assume_clean; int write_behind; unsigned long long size; + int consistency_policy; }; /* List of device names - wildcards expanded */ @@ -618,6 +629,7 @@ enum sysfs_read_flags { GET_STATE = (1 << 23), GET_ERROR = (1 << 24), GET_ARRAY_STATE = (1 << 25), + GET_CONSISTENCY_POLICY = (1 << 26), }; /* If fd >= 0, get the array it is open on, @@ -701,7 +713,7 @@ extern int restore_stripes(int *dest, unsigned long long *offsets, extern char *map_num(mapping_t *map, int num); extern int map_name(mapping_t *map, char *name); -extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[]; +extern mapping_t r5layout[], r6layout[], pers[], modes[], faultylayout[], consistency_policies[]; extern char *map_dev_preferred(int major, int minor, int create, char *prefer); @@ -863,7 +875,7 @@ extern struct superswitch { * metadata. */ int (*init_super)(struct supertype *st, mdu_array_info_t *info, - unsigned long long size, char *name, + struct shape *s, char *name, char *homehost, int *uuid, unsigned long long data_offset); @@ -961,7 +973,7 @@ extern struct superswitch { int *chunk, unsigned long long size, unsigned long long data_offset, char *subdev, unsigned long long *freesize, - int verbose); + int consistency_policy, int verbose); /* Return a linked list of 'mdinfo' structures for all arrays * in the container. For non-containers, it is like @@ -1059,6 +1071,9 @@ extern struct superswitch { /* validate container after assemble */ int (*validate_container)(struct mdinfo *info); + /* write initial empty PPL on device */ + int (*write_init_ppl)(struct supertype *st, struct mdinfo *info, int fd); + /* records new bad block in metadata */ int (*record_bad_block)(struct active_array *a, int n, unsigned long long sector, int length); |