diff options
Diffstat (limited to 'drivers/md/md.h')
| -rw-r--r-- | drivers/md/md.h | 80 |
1 files changed, 48 insertions, 32 deletions
diff --git a/drivers/md/md.h b/drivers/md/md.h index 670c10e6b484..44c63dfeeb2b 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -72,34 +72,7 @@ struct md_rdev { * This reduces the burden of testing multiple flags in many cases */ - unsigned long flags; -#define Faulty 1 /* device is known to have a fault */ -#define In_sync 2 /* device is in_sync with rest of array */ -#define WriteMostly 4 /* Avoid reading if at all possible */ -#define AutoDetected 7 /* added by auto-detect */ -#define Blocked 8 /* An error occurred but has not yet - * been acknowledged by the metadata - * handler, so don't allow writes - * until it is cleared */ -#define WriteErrorSeen 9 /* A write error has been seen on this - * device - */ -#define FaultRecorded 10 /* Intermediate state for clearing - * Blocked. The Fault is/will-be - * recorded in the metadata, but that - * metadata hasn't been stored safely - * on disk yet. - */ -#define BlockedBadBlocks 11 /* A writer is blocked because they - * found an unacknowledged bad-block. - * This can safely be cleared at any - * time, and the writer will re-check. - * It may be set at any time, and at - * worst the writer will timeout and - * re-check. So setting it as - * accurately as possible is good, but - * not absolutely critical. - */ + unsigned long flags; /* bit set of 'enum flag_bits' bits. */ wait_queue_head_t blocked_wait; int desc_nr; /* descriptor index in the superblock */ @@ -152,6 +125,44 @@ struct md_rdev { sector_t size; /* in sectors */ } badblocks; }; +enum flag_bits { + Faulty, /* device is known to have a fault */ + In_sync, /* device is in_sync with rest of array */ + WriteMostly, /* Avoid reading if at all possible */ + AutoDetected, /* added by auto-detect */ + Blocked, /* An error occurred but has not yet + * been acknowledged by the metadata + * handler, so don't allow writes + * until it is cleared */ + WriteErrorSeen, /* A write error has been seen on this + * device + */ + FaultRecorded, /* Intermediate state for clearing + * Blocked. The Fault is/will-be + * recorded in the metadata, but that + * metadata hasn't been stored safely + * on disk yet. + */ + BlockedBadBlocks, /* A writer is blocked because they + * found an unacknowledged bad-block. + * This can safely be cleared at any + * time, and the writer will re-check. + * It may be set at any time, and at + * worst the writer will timeout and + * re-check. So setting it as + * accurately as possible is good, but + * not absolutely critical. + */ + WantReplacement, /* This device is a candidate to be + * hot-replaced, either because it has + * reported some faults, or because + * of explicit request. + */ + Replacement, /* This device is a replacement for + * a want_replacement device with same + * raid_disk number. + */ +}; #define BB_LEN_MASK (0x00000000000001FFULL) #define BB_OFFSET_MASK (0x7FFFFFFFFFFFFE00ULL) @@ -482,15 +493,20 @@ static inline char * mdname (struct mddev * mddev) static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev) { char nm[20]; - sprintf(nm, "rd%d", rdev->raid_disk); - return sysfs_create_link(&mddev->kobj, &rdev->kobj, nm); + if (!test_bit(Replacement, &rdev->flags)) { + sprintf(nm, "rd%d", rdev->raid_disk); + return sysfs_create_link(&mddev->kobj, &rdev->kobj, nm); + } else + return 0; } static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev) { char nm[20]; - sprintf(nm, "rd%d", rdev->raid_disk); - sysfs_remove_link(&mddev->kobj, nm); + if (!test_bit(Replacement, &rdev->flags)) { + sprintf(nm, "rd%d", rdev->raid_disk); + sysfs_remove_link(&mddev->kobj, nm); + } } /* |