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Btrfs: enhance btrfs structures for device replace support

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Signed-off-by: Stefan Behrens <sbehrens@giantdisaster.de>
Signed-off-by: Chris Mason <chris.mason@fusionio.com>
This commit is contained in:
Stefan Behrens 2012-11-05 17:26:40 +01:00 committed by Josef Bacik
parent 1acd6831d9
commit e922e087a3
2 changed files with 44 additions and 0 deletions
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39
fs/btrfs/ctree.h
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@ -885,6 +885,42 @@ struct btrfs_dev_stats_item {
__le64 values[BTRFS_DEV_STAT_VALUES_MAX];
} __attribute__ ((__packed__));
#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_ALWAYS 0
#define BTRFS_DEV_REPLACE_ITEM_CONT_READING_FROM_SRCDEV_MODE_AVOID 1
#define BTRFS_DEV_REPLACE_ITEM_STATE_NEVER_STARTED 0
#define BTRFS_DEV_REPLACE_ITEM_STATE_STARTED 1
#define BTRFS_DEV_REPLACE_ITEM_STATE_SUSPENDED 2
#define BTRFS_DEV_REPLACE_ITEM_STATE_FINISHED 3
#define BTRFS_DEV_REPLACE_ITEM_STATE_CANCELED 4
struct btrfs_dev_replace {
u64 replace_state; /* see #define above */
u64 time_started; /* seconds since 1-Jan-1970 */
u64 time_stopped; /* seconds since 1-Jan-1970 */
atomic64_t num_write_errors;
atomic64_t num_uncorrectable_read_errors;
u64 cursor_left;
u64 committed_cursor_left;
u64 cursor_left_last_write_of_item;
u64 cursor_right;
u64 cont_reading_from_srcdev_mode; /* see #define above */
int is_valid;
int item_needs_writeback;
struct btrfs_device *srcdev;
struct btrfs_device *tgtdev;
pid_t lock_owner;
atomic_t nesting_level;
struct mutex lock_finishing_cancel_unmount;
struct mutex lock_management_lock;
struct mutex lock;
struct btrfs_scrub_progress scrub_progress;
};
/* different types of block groups (and chunks) */
#define BTRFS_BLOCK_GROUP_DATA (1ULL << 0)
#define BTRFS_BLOCK_GROUP_SYSTEM (1ULL << 1)
@ -1471,6 +1507,9 @@ struct btrfs_fs_info {
int backup_root_index;
int num_tolerated_disk_barrier_failures;
/* device replace state */
struct btrfs_dev_replace dev_replace;
};
/*

5
fs/btrfs/disk-io.c
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@ -2131,6 +2131,11 @@ int open_ctree(struct super_block *sb,
init_rwsem(&fs_info->extent_commit_sem);
init_rwsem(&fs_info->cleanup_work_sem);
init_rwsem(&fs_info->subvol_sem);
fs_info->dev_replace.lock_owner = 0;
atomic_set(&fs_info->dev_replace.nesting_level, 0);
mutex_init(&fs_info->dev_replace.lock_finishing_cancel_unmount);
mutex_init(&fs_info->dev_replace.lock_management_lock);
mutex_init(&fs_info->dev_replace.lock);
spin_lock_init(&fs_info->qgroup_lock);
fs_info->qgroup_tree = RB_ROOT;