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drivers/md/md.h
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/* |
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md.h : kernel internal structure of the Linux MD driver |
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Copyright (C) 1996-98 Ingo Molnar, Gadi Oxman |
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This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. |
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You should have received a copy of the GNU General Public License (for example /usr/src/linux/COPYING); if not, write to the Free |
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Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
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*/ |
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#ifndef _MD_MD_H #define _MD_MD_H #include <linux/blkdev.h> |
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#include <linux/backing-dev.h> |
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#include <linux/badblocks.h> |
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#include <linux/kobject.h> #include <linux/list.h> #include <linux/mm.h> #include <linux/mutex.h> #include <linux/timer.h> #include <linux/wait.h> #include <linux/workqueue.h> |
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#include "md-cluster.h" |
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|
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#define MaxSector (~(sector_t)0) |
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/* |
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* MD's 'extended' device */ |
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struct md_rdev { |
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struct list_head same_set; /* RAID devices within the same set */ |
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sector_t sectors; /* Device size (in 512bytes sectors) */ |
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struct mddev *mddev; /* RAID array if running */ |
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int last_events; /* IO event timestamp */ |
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|
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/* * If meta_bdev is non-NULL, it means that a separate device is * being used to store the metadata (superblock/bitmap) which * would otherwise be contained on the same device as the data (bdev). */ struct block_device *meta_bdev; |
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struct block_device *bdev; /* block device handle */ |
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struct page *sb_page, *bb_page; |
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int sb_loaded; |
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__u64 sb_events; |
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sector_t data_offset; /* start of data in array */ |
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sector_t new_data_offset;/* only relevant while reshaping */ |
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sector_t sb_start; /* offset of the super block (in 512byte sectors) */ |
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int sb_size; /* bytes in the superblock */ |
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int preferred_minor; /* autorun support */ |
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struct kobject kobj; |
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/* A device can be in one of three states based on two flags: * Not working: faulty==1 in_sync==0 * Fully working: faulty==0 in_sync==1 * Working, but not * in sync with array * faulty==0 in_sync==0 * * It can never have faulty==1, in_sync==1 * This reduces the burden of testing multiple flags in many cases */ |
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unsigned long flags; /* bit set of 'enum flag_bits' bits. */ |
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wait_queue_head_t blocked_wait; |
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int desc_nr; /* descriptor index in the superblock */ int raid_disk; /* role of device in array */ |
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int new_raid_disk; /* role that the device will have in * the array after a level-change completes. */ |
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int saved_raid_disk; /* role that device used to have in the * array and could again if we did a partial * resync from the bitmap */ |
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union { sector_t recovery_offset;/* If this device has been partially |
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* recovered, this is where we were * up to. */ |
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sector_t journal_tail; /* If this device is a journal device, * this is the journal tail (journal * recovery start point) */ }; |
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atomic_t nr_pending; /* number of pending requests. * only maintained for arrays that * support hot removal */ |
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atomic_t read_errors; /* number of consecutive read errors that * we have tried to ignore. */ |
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time64_t last_read_error; /* monotonic time since our |
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* last read error */ |
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atomic_t corrected_errors; /* number of corrected read errors, * for reporting to userspace and storing * in superblock. */ |
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struct work_struct del_work; /* used for delayed sysfs removal */ |
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struct kernfs_node *sysfs_state; /* handle for 'state' |
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* sysfs entry */ |
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struct badblocks badblocks; |
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}; |
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enum flag_bits { Faulty, /* device is known to have a fault */ In_sync, /* device is in_sync with rest of array */ |
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Bitmap_sync, /* ..actually, not quite In_sync. Need a * bitmap-based recovery to get fully in sync */ |
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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. */ |
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Candidate, /* For clustered environments only: * This device is seen locally but not * by the whole cluster */ |
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Journal, /* This device is used as journal for * raid-5/6. * Usually, this device should be faster * than other devices in the array */ |
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ClusterRemove, |
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RemoveSynchronized, /* synchronize_rcu() was called after * this device was known to be faulty, * so it is safe to remove without * another synchronize_rcu() call. */ |
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}; |
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static inline int is_badblock(struct md_rdev *rdev, sector_t s, int sectors, |
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sector_t *first_bad, int *bad_sectors) { if (unlikely(rdev->badblocks.count)) { |
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int rv = badblocks_check(&rdev->badblocks, rdev->data_offset + s, |
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sectors, first_bad, bad_sectors); if (rv) *first_bad -= rdev->data_offset; return rv; } return 0; } |
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extern int rdev_set_badblocks(struct md_rdev *rdev, sector_t s, int sectors, |
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int is_new); extern int rdev_clear_badblocks(struct md_rdev *rdev, sector_t s, int sectors, int is_new); |
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struct md_cluster_info; |
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struct mddev { |
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void *private; |
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struct md_personality *pers; |
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dev_t unit; int md_minor; |
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struct list_head disks; |
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unsigned long flags; #define MD_CHANGE_DEVS 0 /* Some device status has changed */ #define MD_CHANGE_CLEAN 1 /* transition to or from 'clean' */ |
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#define MD_CHANGE_PENDING 2 /* switch from 'clean' to 'active' in progress */ |
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#define MD_UPDATE_SB_FLAGS (1 | 2 | 4) /* If these are set, md_update_sb needed */ |
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#define MD_ARRAY_FIRST_USE 3 /* First use of array, needs initialization */ |
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#define MD_CLOSING 4 /* If set, we are closing the array, do not open * it then */ |
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#define MD_JOURNAL_CLEAN 5 /* A raid with journal is already clean */ |
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#define MD_HAS_JOURNAL 6 /* The raid array has journal feature set */ |
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#define MD_RELOAD_SB 7 /* Reload the superblock because another node * updated it. */ |
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#define MD_CLUSTER_RESYNC_LOCKED 8 /* cluster raid only, which means node * already took resync lock, need to * release the lock */ |
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int suspended; atomic_t active_io; |
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int ro; |
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int sysfs_active; /* set when sysfs deletes * are happening, so run/ * takeover/stop are not safe */ |
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struct gendisk *gendisk; |
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struct kobject kobj; |
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int hold_active; #define UNTIL_IOCTL 1 |
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#define UNTIL_STOP 2 |
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/* Superblock information */ int major_version, minor_version, patch_version; int persistent; |
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int external; /* metadata is |
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* managed externally */ char metadata_type[17]; /* externally set*/ |
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int chunk_sectors; |
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time64_t ctime, utime; |
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int level, layout; |
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char clevel[16]; |
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int raid_disks; int max_disks; |
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sector_t dev_sectors; /* used size of |
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* component devices */ |
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sector_t array_sectors; /* exported array size */ |
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int external_size; /* size managed * externally */ |
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__u64 events; |
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/* If the last 'event' was simply a clean->dirty transition, and * we didn't write it to the spares, then it is safe and simple * to just decrement the event count on a dirty->clean transition. * So we record that possibility here. */ int can_decrease_events; |
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char uuid[16]; |
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/* If the array is being reshaped, we need to record the * new shape and an indication of where we are up to. * This is written to the superblock. * If reshape_position is MaxSector, then no reshape is happening (yet). */ sector_t reshape_position; |
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int delta_disks, new_level, new_layout; int new_chunk_sectors; |
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int reshape_backwards; |
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struct md_thread *thread; /* management thread */ struct md_thread *sync_thread; /* doing resync or reconstruct */ |
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/* 'last_sync_action' is initialized to "none". It is set when a * sync operation (i.e "data-check", "requested-resync", "resync", * "recovery", or "reshape") is started. It holds this value even * when the sync thread is "frozen" (interrupted) or "idle" (stopped * or finished). It is overwritten when a new sync operation is begun. */ char *last_sync_action; |
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sector_t curr_resync; /* last block scheduled */ |
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/* As resync requests can complete out of order, we cannot easily track * how much resync has been completed. So we occasionally pause until * everything completes, then set curr_resync_completed to curr_resync. * As such it may be well behind the real resync mark, but it is a value * we are certain of. */ sector_t curr_resync_completed; |
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unsigned long resync_mark; /* a recent timestamp */ sector_t resync_mark_cnt;/* blocks written at resync_mark */ |
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sector_t curr_mark_cnt; /* blocks scheduled now */ |
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sector_t resync_max_sectors; /* may be set by personality */ |
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atomic64_t resync_mismatches; /* count of sectors where |
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* parity/replica mismatch found */ |
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/* allow user-space to request suspension of IO to regions of the array */ sector_t suspend_lo; sector_t suspend_hi; |
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/* if zero, use the system-wide default */ int sync_speed_min; int sync_speed_max; |
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/* resync even though the same disks are shared among md-devices */ int parallel_resync; |
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int ok_start_degraded; |
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/* recovery/resync flags |
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* NEEDED: we might need to start a resync/recover * RUNNING: a thread is running, or about to be started * SYNC: actually doing a resync, not a recovery |
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* RECOVER: doing recovery, or need to try it. |
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* INTR: resync needs to be aborted for some reason |
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* DONE: thread is done and is waiting to be reaped |
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* REQUEST: user-space has requested a sync (used with SYNC) |
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* CHECK: user-space request for check-only, no repair |
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* RESHAPE: A reshape is happening |
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* ERROR: sync-action interrupted because io-error |
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* * If neither SYNC or RESHAPE are set, then it is a recovery. |
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*/ #define MD_RECOVERY_RUNNING 0 #define MD_RECOVERY_SYNC 1 |
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#define MD_RECOVERY_RECOVER 2 |
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#define MD_RECOVERY_INTR 3 #define MD_RECOVERY_DONE 4 #define MD_RECOVERY_NEEDED 5 |
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#define MD_RECOVERY_REQUESTED 6 #define MD_RECOVERY_CHECK 7 |
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#define MD_RECOVERY_RESHAPE 8 |
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#define MD_RECOVERY_FROZEN 9 |
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#define MD_RECOVERY_ERROR 10 |
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|
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unsigned long recovery; |
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/* If a RAID personality determines that recovery (of a particular * device) will fail due to a read error on the source device, it * takes a copy of this number and does not attempt recovery again * until this number changes. */ int recovery_disabled; |
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int in_sync; /* know to not need resync */ |
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/* 'open_mutex' avoids races between 'md_open' and 'do_md_stop', so * that we are never stopping an array while it is open. * 'reconfig_mutex' protects all other reconfiguration. * These locks are separate due to conflicting interactions * with bdev->bd_mutex. * Lock ordering is: * reconfig_mutex -> bd_mutex : e.g. do_md_run -> revalidate_disk * bd_mutex -> open_mutex: e.g. __blkdev_get -> md_open */ struct mutex open_mutex; |
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struct mutex reconfig_mutex; |
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atomic_t active; /* general refcount */ atomic_t openers; /* number of active opens */ |
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int changed; /* True if we might need to * reread partition info */ |
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int degraded; /* whether md should consider * adding a spare */ atomic_t recovery_active; /* blocks scheduled, but not written */ wait_queue_head_t recovery_wait; sector_t recovery_cp; |
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sector_t resync_min; /* user requested sync * starts here */ |
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sector_t resync_max; /* resync should pause * when it gets here */ |
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struct kernfs_node *sysfs_state; /* handle for 'array_state' |
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* file in sysfs. */ |
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struct kernfs_node *sysfs_action; /* handle for 'sync_action' */ |
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struct work_struct del_work; /* used for delayed sysfs removal */ |
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/* "lock" protects: * flush_bio transition from NULL to !NULL * rdev superblocks, events * clearing MD_CHANGE_* * in_sync - and related safemode and MD_CHANGE changes |
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* pers (also protected by reconfig_mutex and pending IO). |
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* clearing ->bitmap |
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* clearing ->bitmap_info.file |
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* changing ->resync_{min,max} * setting MD_RECOVERY_RUNNING (which interacts with resync_{min,max}) |
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*/ spinlock_t lock; |
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wait_queue_head_t sb_wait; /* for waiting on superblock updates */ |
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atomic_t pending_writes; /* number of active superblock writes */ |
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unsigned int safemode; /* if set, update "clean" superblock * when no writes pending. |
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*/ |
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unsigned int safemode_delay; struct timer_list safemode_timer; |
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atomic_t writes_pending; |
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struct request_queue *queue; /* for plugging ... */ |
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struct bitmap *bitmap; /* the bitmap for the device */ |
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struct { struct file *file; /* the bitmap file */ |
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loff_t offset; /* offset from superblock of |
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* start of bitmap. May be * negative, but not '0' |
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* For external metadata, offset |
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* from start of device. |
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*/ |
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unsigned long space; /* space available at this offset */ |
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loff_t default_offset; /* this is the offset to use when |
c3d9714e8 md: collect bitma... |
400 401 402 |
* hot-adding a bitmap. It should * eventually be settable by sysfs. */ |
6409bb05a md/bitmap: add ne... |
403 404 |
unsigned long default_space; /* space available at * default offset */ |
c3d9714e8 md: collect bitma... |
405 |
struct mutex mutex; |
42a04b507 md: move offset, ... |
406 |
unsigned long chunksize; |
ac2f40be4 md/bitmap: white ... |
407 |
unsigned long daemon_sleep; /* how many jiffies between updates? */ |
42a04b507 md: move offset, ... |
408 |
unsigned long max_write_behind; /* write-behind mode */ |
ece5cff0d md: Support write... |
409 |
int external; |
c4ce867fd Introduce md_clus... |
410 |
int nodes; /* Maximum number of nodes in the cluster */ |
cf921cc19 Add node recovery... |
411 |
char cluster_name[64]; /* Name of the cluster */ |
c3d9714e8 md: collect bitma... |
412 |
} bitmap_info; |
32a7627cf [PATCH] md: optim... |
413 |
|
f72ffdd68 md: remove unwant... |
414 |
atomic_t max_corr_read_errors; /* max read retries */ |
1da177e4c Linux-2.6.12-rc2 |
415 |
struct list_head all_mddevs; |
a2826aa92 md: support barri... |
416 |
|
a64c876fd md: manage redund... |
417 |
struct attribute_group *to_remove; |
252ac5221 md/plug: optional... |
418 |
|
a167f6632 md: use separate ... |
419 |
struct bio_set *bio_set; |
e9c7469bb md: implment REQ_... |
420 421 |
/* Generic flush handling. * The last to finish preflush schedules a worker to submit |
28a8f0d31 block, drivers, f... |
422 |
* the rest of the request (without the REQ_PREFLUSH flag). |
a2826aa92 md: support barri... |
423 |
*/ |
e9c7469bb md: implment REQ_... |
424 |
struct bio *flush_bio; |
a2826aa92 md: support barri... |
425 |
atomic_t flush_pending; |
e9c7469bb md: implment REQ_... |
426 |
struct work_struct flush_work; |
768a418db md: add support f... |
427 |
struct work_struct event_work; /* used by dm to report failure event */ |
fd01b88c7 md: remove typede... |
428 |
void (*sync_super)(struct mddev *mddev, struct md_rdev *rdev); |
c4ce867fd Introduce md_clus... |
429 |
struct md_cluster_info *cluster_info; |
15858fa5b md-cluster: Defer... |
430 |
unsigned int good_device_nr; /* good device num within cluster raid */ |
1da177e4c Linux-2.6.12-rc2 |
431 |
}; |
5c47daf6e md: move mddev_lo... |
432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 |
static inline int __must_check mddev_lock(struct mddev *mddev) { return mutex_lock_interruptible(&mddev->reconfig_mutex); } /* Sometimes we need to take the lock in a situation where * failure due to interrupts is not acceptable. */ static inline void mddev_lock_nointr(struct mddev *mddev) { mutex_lock(&mddev->reconfig_mutex); } static inline int mddev_is_locked(struct mddev *mddev) { return mutex_is_locked(&mddev->reconfig_mutex); } static inline int mddev_trylock(struct mddev *mddev) { return mutex_trylock(&mddev->reconfig_mutex); } extern void mddev_unlock(struct mddev *mddev); |
1da177e4c Linux-2.6.12-rc2 |
455 456 |
static inline void md_sync_acct(struct block_device *bdev, unsigned long nr_sectors) { |
f72ffdd68 md: remove unwant... |
457 |
atomic_add(nr_sectors, &bdev->bd_contains->bd_disk->sync_io); |
1da177e4c Linux-2.6.12-rc2 |
458 |
} |
84fc4b56d md: rename "mdk_p... |
459 |
struct md_personality |
1da177e4c Linux-2.6.12-rc2 |
460 461 |
{ char *name; |
2604b703b [PATCH] md: remov... |
462 463 |
int level; struct list_head list; |
1da177e4c Linux-2.6.12-rc2 |
464 |
struct module *owner; |
b4fdcb02f Merge branch 'for... |
465 |
void (*make_request)(struct mddev *mddev, struct bio *bio); |
fd01b88c7 md: remove typede... |
466 |
int (*run)(struct mddev *mddev); |
afa0f557c md: rename ->stop... |
467 |
void (*free)(struct mddev *mddev, void *priv); |
fd01b88c7 md: remove typede... |
468 |
void (*status)(struct seq_file *seq, struct mddev *mddev); |
1da177e4c Linux-2.6.12-rc2 |
469 |
/* error_handler must set ->faulty and clear ->in_sync |
f72ffdd68 md: remove unwant... |
470 |
* if appropriate, and should abort recovery if needed |
1da177e4c Linux-2.6.12-rc2 |
471 |
*/ |
fd01b88c7 md: remove typede... |
472 473 |
void (*error_handler)(struct mddev *mddev, struct md_rdev *rdev); int (*hot_add_disk) (struct mddev *mddev, struct md_rdev *rdev); |
b8321b68d md: change hot_re... |
474 |
int (*hot_remove_disk) (struct mddev *mddev, struct md_rdev *rdev); |
fd01b88c7 md: remove typede... |
475 |
int (*spare_active) (struct mddev *mddev); |
09314799e md: remove 'go_fa... |
476 |
sector_t (*sync_request)(struct mddev *mddev, sector_t sector_nr, int *skipped); |
fd01b88c7 md: remove typede... |
477 478 479 480 481 |
int (*resize) (struct mddev *mddev, sector_t sectors); sector_t (*size) (struct mddev *mddev, sector_t sectors, int raid_disks); int (*check_reshape) (struct mddev *mddev); int (*start_reshape) (struct mddev *mddev); void (*finish_reshape) (struct mddev *mddev); |
36fa30636 [PATCH] md: all h... |
482 483 484 485 486 |
/* quiesce moves between quiescence states * 0 - fully active * 1 - no new requests allowed * others - reserved */ |
fd01b88c7 md: remove typede... |
487 |
void (*quiesce) (struct mddev *mddev, int state); |
245f46c2c md: add ->takeove... |
488 489 490 491 492 493 494 495 496 |
/* takeover is used to transition an array from one * personality to another. The new personality must be able * to handle the data in the current layout. * e.g. 2drive raid1 -> 2drive raid5 * ndrive raid5 -> degraded n+1drive raid6 with special layout * If the takeover succeeds, a new 'private' structure is returned. * This needs to be installed and then ->run used to activate the * array. */ |
fd01b88c7 md: remove typede... |
497 |
void *(*takeover) (struct mddev *mddev); |
5c675f83c md: make ->conges... |
498 499 500 |
/* congested implements bdi.congested_fn(). * Will not be called while array is 'suspended' */ int (*congested)(struct mddev *mddev, int bits); |
1da177e4c Linux-2.6.12-rc2 |
501 |
}; |
007583c92 [PATCH] md: chang... |
502 503 |
struct md_sysfs_entry { struct attribute attr; |
fd01b88c7 md: remove typede... |
504 505 |
ssize_t (*show)(struct mddev *, char *); ssize_t (*store)(struct mddev *, const char *, size_t); |
007583c92 [PATCH] md: chang... |
506 |
}; |
43a705076 md: support updat... |
507 |
extern struct attribute_group md_bitmap_group; |
007583c92 [PATCH] md: chang... |
508 |
|
324a56e16 kernfs: s/sysfs_d... |
509 |
static inline struct kernfs_node *sysfs_get_dirent_safe(struct kernfs_node *sd, char *name) |
00bcb4ac7 md: reduce depend... |
510 511 |
{ if (sd) |
388975ccc sysfs: clean up s... |
512 |
return sysfs_get_dirent(sd, name); |
00bcb4ac7 md: reduce depend... |
513 514 |
return sd; } |
324a56e16 kernfs: s/sysfs_d... |
515 |
static inline void sysfs_notify_dirent_safe(struct kernfs_node *sd) |
00bcb4ac7 md: reduce depend... |
516 517 518 519 |
{ if (sd) sysfs_notify_dirent(sd); } |
fd01b88c7 md: remove typede... |
520 |
static inline char * mdname (struct mddev * mddev) |
1da177e4c Linux-2.6.12-rc2 |
521 522 523 |
{ return mddev->gendisk ? mddev->gendisk->disk_name : "mdX"; } |
fd01b88c7 md: remove typede... |
524 |
static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev) |
36fad858a md: introduce lin... |
525 526 |
{ char nm[20]; |
9b15603db MD: change journa... |
527 528 529 |
if (!test_bit(Replacement, &rdev->flags) && !test_bit(Journal, &rdev->flags) && mddev->kobj.sd) { |
2d78f8c45 md: create extern... |
530 531 532 533 |
sprintf(nm, "rd%d", rdev->raid_disk); return sysfs_create_link(&mddev->kobj, &rdev->kobj, nm); } else return 0; |
36fad858a md: introduce lin... |
534 |
} |
fd01b88c7 md: remove typede... |
535 |
static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev) |
36fad858a md: introduce lin... |
536 537 |
{ char nm[20]; |
9b15603db MD: change journa... |
538 539 540 |
if (!test_bit(Replacement, &rdev->flags) && !test_bit(Journal, &rdev->flags) && mddev->kobj.sd) { |
2d78f8c45 md: create extern... |
541 542 543 |
sprintf(nm, "rd%d", rdev->raid_disk); sysfs_remove_link(&mddev->kobj, nm); } |
36fad858a md: introduce lin... |
544 |
} |
1da177e4c Linux-2.6.12-rc2 |
545 546 547 548 |
/* * iterates through some rdev ringlist. It's safe to remove the * current 'rdev'. Dont touch 'tmp' though. */ |
159ec1fc0 md: use list_for_... |
549 550 |
#define rdev_for_each_list(rdev, tmp, head) \ list_for_each_entry_safe(rdev, tmp, head, same_set) |
1da177e4c Linux-2.6.12-rc2 |
551 552 553 |
/* * iterates through the 'same array disks' ringlist */ |
dafb20fa3 md: tidy up rdev_... |
554 555 556 557 |
#define rdev_for_each(rdev, mddev) \ list_for_each_entry(rdev, &((mddev)->disks), same_set) #define rdev_for_each_safe(rdev, tmp, mddev) \ |
159ec1fc0 md: use list_for_... |
558 |
list_for_each_entry_safe(rdev, tmp, &((mddev)->disks), same_set) |
1da177e4c Linux-2.6.12-rc2 |
559 |
|
4b80991c6 md: Protect acces... |
560 561 |
#define rdev_for_each_rcu(rdev, mddev) \ list_for_each_entry_rcu(rdev, &((mddev)->disks), same_set) |
2b8bf3451 md: remove typede... |
562 |
struct md_thread { |
4ed8731d8 MD: change the pa... |
563 |
void (*run) (struct md_thread *thread); |
fd01b88c7 md: remove typede... |
564 |
struct mddev *mddev; |
1da177e4c Linux-2.6.12-rc2 |
565 |
wait_queue_head_t wqueue; |
f72ffdd68 md: remove unwant... |
566 |
unsigned long flags; |
1da177e4c Linux-2.6.12-rc2 |
567 |
struct task_struct *tsk; |
32a7627cf [PATCH] md: optim... |
568 |
unsigned long timeout; |
4ed8731d8 MD: change the pa... |
569 |
void *private; |
2b8bf3451 md: remove typede... |
570 |
}; |
1da177e4c Linux-2.6.12-rc2 |
571 572 |
#define THREAD_WAKEUP 0 |
1345b1d8a [PATCH] md: defin... |
573 574 575 576 |
static inline void safe_put_page(struct page *p) { if (p) put_page(p); } |
84fc4b56d md: rename "mdk_p... |
577 578 |
extern int register_md_personality(struct md_personality *p); extern int unregister_md_personality(struct md_personality *p); |
edb39c9de Introduce md_clus... |
579 580 581 582 583 |
extern int register_md_cluster_operations(struct md_cluster_operations *ops, struct module *module); extern int unregister_md_cluster_operations(void); extern int md_setup_cluster(struct mddev *mddev, int nodes); extern void md_cluster_stop(struct mddev *mddev); |
2b8bf3451 md: remove typede... |
584 |
extern struct md_thread *md_register_thread( |
4ed8731d8 MD: change the pa... |
585 |
void (*run)(struct md_thread *thread), |
2b8bf3451 md: remove typede... |
586 587 588 589 |
struct mddev *mddev, const char *name); extern void md_unregister_thread(struct md_thread **threadp); extern void md_wakeup_thread(struct md_thread *thread); |
fd01b88c7 md: remove typede... |
590 |
extern void md_check_recovery(struct mddev *mddev); |
a91d5ac04 MD: Export 'md_re... |
591 |
extern void md_reap_sync_thread(struct mddev *mddev); |
fd01b88c7 md: remove typede... |
592 593 594 595 |
extern void md_write_start(struct mddev *mddev, struct bio *bi); extern void md_write_end(struct mddev *mddev); extern void md_done_sync(struct mddev *mddev, int blocks, int ok); extern void md_error(struct mddev *mddev, struct md_rdev *rdev); |
c6563a8c3 md: add possibili... |
596 |
extern void md_finish_reshape(struct mddev *mddev); |
fd01b88c7 md: remove typede... |
597 598 599 600 |
extern int mddev_congested(struct mddev *mddev, int bits); extern void md_flush_request(struct mddev *mddev, struct bio *bio); extern void md_super_write(struct mddev *mddev, struct md_rdev *rdev, |
92022950c md: move most con... |
601 |
sector_t sector, int size, struct page *page); |
fd01b88c7 md: remove typede... |
602 |
extern void md_super_wait(struct mddev *mddev); |
f72ffdd68 md: remove unwant... |
603 |
extern int sync_page_io(struct md_rdev *rdev, sector_t sector, int size, |
796a5cf08 md: use bio op ac... |
604 605 |
struct page *page, int op, int op_flags, bool metadata_op); |
4ed8731d8 MD: change the pa... |
606 |
extern void md_do_sync(struct md_thread *thread); |
fd01b88c7 md: remove typede... |
607 608 609 610 611 612 |
extern void md_new_event(struct mddev *mddev); extern int md_allow_write(struct mddev *mddev); extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev); extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors); extern int md_check_no_bitmap(struct mddev *mddev); extern int md_integrity_register(struct mddev *mddev); |
1501efadc md/raid: only per... |
613 |
extern int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev); |
72e02075a md: factor out pa... |
614 |
extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale); |
63fe08177 md: tiny md.h cle... |
615 |
|
fd01b88c7 md: remove typede... |
616 617 618 619 |
extern void mddev_init(struct mddev *mddev); extern int md_run(struct mddev *mddev); extern void md_stop(struct mddev *mddev); extern void md_stop_writes(struct mddev *mddev); |
3cb030020 md: removing type... |
620 |
extern int md_rdev_init(struct md_rdev *rdev); |
545c87957 md: dm-raid shoul... |
621 |
extern void md_rdev_clear(struct md_rdev *rdev); |
63fe08177 md: tiny md.h cle... |
622 |
|
fd01b88c7 md: remove typede... |
623 624 |
extern void mddev_suspend(struct mddev *mddev); extern void mddev_resume(struct mddev *mddev); |
a167f6632 md: use separate ... |
625 |
extern struct bio *bio_clone_mddev(struct bio *bio, gfp_t gfp_mask, |
fd01b88c7 md: remove typede... |
626 |
struct mddev *mddev); |
a167f6632 md: use separate ... |
627 |
extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs, |
fd01b88c7 md: remove typede... |
628 |
struct mddev *mddev); |
9cbb17508 blk: centralize n... |
629 |
|
74018dc30 blk: pass from_sc... |
630 |
extern void md_unplug(struct blk_plug_cb *cb, bool from_schedule); |
70bcecdb1 md-cluster: Impro... |
631 |
extern void md_reload_sb(struct mddev *mddev, int raid_disk); |
1aee41f63 Add new disk to c... |
632 |
extern void md_update_sb(struct mddev *mddev, int force); |
fb56dfef4 md: Export and re... |
633 |
extern void md_kick_rdev_from_array(struct md_rdev * rdev); |
57d051dcc md: Export and re... |
634 |
struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr); |
9cbb17508 blk: centralize n... |
635 636 637 638 639 |
static inline int mddev_check_plugged(struct mddev *mddev) { return !!blk_check_plugged(md_unplug, mddev, sizeof(struct blk_plug_cb)); } |
dfe15ac1c md: wakeup thread... |
640 641 642 643 644 645 646 647 648 |
static inline void rdev_dec_pending(struct md_rdev *rdev, struct mddev *mddev) { int faulty = test_bit(Faulty, &rdev->flags); if (atomic_dec_and_test(&rdev->nr_pending) && faulty) { set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); md_wakeup_thread(mddev->thread); } } |
edb39c9de Introduce md_clus... |
649 |
extern struct md_cluster_operations *md_cluster_ops; |
c4ce867fd Introduce md_clus... |
650 651 652 653 |
static inline int mddev_is_clustered(struct mddev *mddev) { return mddev->cluster_info && mddev->bitmap_info.nodes > 1; } |
63fe08177 md: tiny md.h cle... |
654 |
#endif /* _MD_MD_H */ |