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authorCheng Renquan <crquan@gmail.com>2009-01-09 08:31:08 +1100
committerNeilBrown <neilb@suse.de>2009-01-09 08:31:08 +1100
commitcd2ac9321c26dc7a76455cd2a4df89123fa2b73e (patch)
tree8163a2cc791282cf32fafed19a60f357882d6169 /include/linux/raid
parent159ec1fc060ab22b157a62364045f5e98749c4d3 (diff)
md: need another print_sb for mdp_superblock_1
md_print_devices is called in two code path: MD_BUG(...), and md_ioctl with PRINT_RAID_DEBUG. it will dump out all in use md devices information; However, it wrongly processed two types of superblock in one: The header file <linux/raid/md_p.h> has defined two types of superblock, struct mdp_superblock_s (typedefed with mdp_super_t) according to md with metadata 0.90, and struct mdp_superblock_1 according to md with metadata 1.0 and later, These two types of superblock are very different, The md_print_devices code processed them both in mdp_super_t, that would lead to wrong informaton dump like: [ 6742.345877] [ 6742.345887] md: ********************************** [ 6742.345890] md: * <COMPLETE RAID STATE PRINTOUT> * [ 6742.345892] md: ********************************** [ 6742.345896] md1: <ram7><ram6><ram5><ram4> [ 6742.345907] md: rdev ram7, SZ:00065472 F:0 S:1 DN:3 [ 6742.345909] md: rdev superblock: [ 6742.345914] md: SB: (V:0.90.0) ID:<42ef13c7.598c059a.5f9f1645.801e9ee6> CT:4919856d [ 6742.345918] md: L5 S00065472 ND:4 RD:4 md1 LO:2 CS:65536 [ 6742.345922] md: UT:4919856d ST:1 AD:4 WD:4 FD:0 SD:0 CSUM:b7992907 E:00000001 [ 6742.345924] D 0: DISK<N:0,(1,8),R:0,S:6> [ 6742.345930] D 1: DISK<N:1,(1,10),R:1,S:6> [ 6742.345933] D 2: DISK<N:2,(1,12),R:2,S:6> [ 6742.345937] D 3: DISK<N:3,(1,14),R:3,S:6> [ 6742.345942] md: THIS: DISK<N:3,(1,14),R:3,S:6> ... [ 6742.346058] md0: <ram3><ram2><ram1><ram0> [ 6742.346067] md: rdev ram3, SZ:00065472 F:0 S:1 DN:3 [ 6742.346070] md: rdev superblock: [ 6742.346073] md: SB: (V:1.0.0) ID:<369aad81.00000000.00000000.00000000> CT:9a322a9c [ 6742.346077] md: L-1507699579 S976570180 ND:48 RD:0 md0 LO:65536 CS:196610 [ 6742.346081] md: UT:00000018 ST:0 AD:131048 WD:0 FD:8 SD:0 CSUM:00000000 E:00000000 [ 6742.346084] D 0: DISK<N:-1,(-1,-1),R:-1,S:-1> [ 6742.346089] D 1: DISK<N:-1,(-1,-1),R:-1,S:-1> [ 6742.346092] D 2: DISK<N:-1,(-1,-1),R:-1,S:-1> [ 6742.346096] D 3: DISK<N:-1,(-1,-1),R:-1,S:-1> [ 6742.346102] md: THIS: DISK<N:0,(0,0),R:0,S:0> ... [ 6742.346219] md: ********************************** [ 6742.346221] Here md1 is metadata 0.90.0, and md0 is metadata 1.2 After some more code to distinguish these two types of superblock, in this patch, it will generate dump information like: [ 7906.755790] [ 7906.755799] md: ********************************** [ 7906.755802] md: * <COMPLETE RAID STATE PRINTOUT> * [ 7906.755804] md: ********************************** [ 7906.755808] md1: <ram7><ram6><ram5><ram4> [ 7906.755819] md: rdev ram7, SZ:00065472 F:0 S:1 DN:3 [ 7906.755821] md: rdev superblock (MJ:0): [ 7906.755826] md: SB: (V:0.90.0) ID:<3fca7a0d.a612bfed.5f9f1645.801e9ee6> CT:491989f3 [ 7906.755830] md: L5 S00065472 ND:4 RD:4 md1 LO:2 CS:65536 [ 7906.755834] md: UT:491989f3 ST:1 AD:4 WD:4 FD:0 SD:0 CSUM:00fb52ad E:00000001 [ 7906.755836] D 0: DISK<N:0,(1,8),R:0,S:6> [ 7906.755842] D 1: DISK<N:1,(1,10),R:1,S:6> [ 7906.755845] D 2: DISK<N:2,(1,12),R:2,S:6> [ 7906.755849] D 3: DISK<N:3,(1,14),R:3,S:6> [ 7906.755855] md: THIS: DISK<N:3,(1,14),R:3,S:6> ... [ 7906.755972] md0: <ram3><ram2><ram1><ram0> [ 7906.755981] md: rdev ram3, SZ:00065472 F:0 S:1 DN:3 [ 7906.755984] md: rdev superblock (MJ:1): [ 7906.755989] md: SB: (V:1) (F:0) Array-ID:<5fbcf158:55aa:5fbe:9a79:1e939880dcbd> [ 7906.755990] md: Name: "DG5:0" CT:1226410480 [ 7906.755998] md: L5 SZ130944 RD:4 LO:2 CS:128 DO:24 DS:131048 SO:8 RO:0 [ 7906.755999] md: Dev:00000003 UUID: 9194d744:87f7:a448:85f2:7497b84ce30a [ 7906.756001] md: (F:0) UT:1226410480 Events:0 ResyncOffset:-1 CSUM:0dbcd829 [ 7906.756003] md: (MaxDev:384) ... [ 7906.756113] md: ********************************** [ 7906.756116] this md0 (metadata 1.2) information dumping is exactly according to struct mdp_superblock_1. Signed-off-by: Cheng Renquan <crquan@gmail.com> Cc: Neil Brown <neilb@suse.de> Cc: Dan Williams <dan.j.williams@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'include/linux/raid')
-rw-r--r--include/linux/raid/md_p.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/raid/md_p.h b/include/linux/raid/md_p.h
index 8b4de4a41ff..9491026afe6 100644
--- a/include/linux/raid/md_p.h
+++ b/include/linux/raid/md_p.h
@@ -194,6 +194,8 @@ static inline __u64 md_event(mdp_super_t *sb) {
return (ev<<32)| sb->events_lo;
}
+#define MD_SUPERBLOCK_1_TIME_SEC_MASK ((1ULL<<40) - 1)
+
/*
* The version-1 superblock :
* All numeric fields are little-endian.