mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
![Jeff Mahoney](/assets/img/avatar_default.png)
For many printks, we want to know which file system issued the message. This patch converts most pr_* calls to use the btrfs_* versions instead. In some cases, this means adding plumbing to allow call sites access to an fs_info pointer. fs/btrfs/check-integrity.c is left alone for another day. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
529 lines
16 KiB
C
529 lines
16 KiB
C
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#ifndef __BTRFS_VOLUMES_
|
|
#define __BTRFS_VOLUMES_
|
|
|
|
#include <linux/bio.h>
|
|
#include <linux/sort.h>
|
|
#include <linux/btrfs.h>
|
|
#include "async-thread.h"
|
|
|
|
extern struct mutex uuid_mutex;
|
|
|
|
#define BTRFS_STRIPE_LEN SZ_64K
|
|
|
|
struct buffer_head;
|
|
struct btrfs_pending_bios {
|
|
struct bio *head;
|
|
struct bio *tail;
|
|
};
|
|
|
|
/*
|
|
* Use sequence counter to get consistent device stat data on
|
|
* 32-bit processors.
|
|
*/
|
|
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
|
|
#include <linux/seqlock.h>
|
|
#define __BTRFS_NEED_DEVICE_DATA_ORDERED
|
|
#define btrfs_device_data_ordered_init(device) \
|
|
seqcount_init(&device->data_seqcount)
|
|
#else
|
|
#define btrfs_device_data_ordered_init(device) do { } while (0)
|
|
#endif
|
|
|
|
struct btrfs_device {
|
|
struct list_head dev_list;
|
|
struct list_head dev_alloc_list;
|
|
struct btrfs_fs_devices *fs_devices;
|
|
|
|
struct btrfs_root *dev_root;
|
|
|
|
struct rcu_string *name;
|
|
|
|
u64 generation;
|
|
|
|
spinlock_t io_lock ____cacheline_aligned;
|
|
int running_pending;
|
|
/* regular prio bios */
|
|
struct btrfs_pending_bios pending_bios;
|
|
/* WRITE_SYNC bios */
|
|
struct btrfs_pending_bios pending_sync_bios;
|
|
|
|
struct block_device *bdev;
|
|
|
|
/* the mode sent to blkdev_get */
|
|
fmode_t mode;
|
|
|
|
int writeable;
|
|
int in_fs_metadata;
|
|
int missing;
|
|
int can_discard;
|
|
int is_tgtdev_for_dev_replace;
|
|
|
|
#ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
|
|
seqcount_t data_seqcount;
|
|
#endif
|
|
|
|
/* the internal btrfs device id */
|
|
u64 devid;
|
|
|
|
/* size of the device in memory */
|
|
u64 total_bytes;
|
|
|
|
/* size of the device on disk */
|
|
u64 disk_total_bytes;
|
|
|
|
/* bytes used */
|
|
u64 bytes_used;
|
|
|
|
/* optimal io alignment for this device */
|
|
u32 io_align;
|
|
|
|
/* optimal io width for this device */
|
|
u32 io_width;
|
|
/* type and info about this device */
|
|
u64 type;
|
|
|
|
/* minimal io size for this device */
|
|
u32 sector_size;
|
|
|
|
/* physical drive uuid (or lvm uuid) */
|
|
u8 uuid[BTRFS_UUID_SIZE];
|
|
|
|
/*
|
|
* size of the device on the current transaction
|
|
*
|
|
* This variant is update when committing the transaction,
|
|
* and protected by device_list_mutex
|
|
*/
|
|
u64 commit_total_bytes;
|
|
|
|
/* bytes used on the current transaction */
|
|
u64 commit_bytes_used;
|
|
/*
|
|
* used to manage the device which is resized
|
|
*
|
|
* It is protected by chunk_lock.
|
|
*/
|
|
struct list_head resized_list;
|
|
|
|
/* for sending down flush barriers */
|
|
int nobarriers;
|
|
struct bio *flush_bio;
|
|
struct completion flush_wait;
|
|
|
|
/* per-device scrub information */
|
|
struct scrub_ctx *scrub_device;
|
|
|
|
struct btrfs_work work;
|
|
struct rcu_head rcu;
|
|
struct work_struct rcu_work;
|
|
|
|
/* readahead state */
|
|
spinlock_t reada_lock;
|
|
atomic_t reada_in_flight;
|
|
u64 reada_next;
|
|
struct reada_zone *reada_curr_zone;
|
|
struct radix_tree_root reada_zones;
|
|
struct radix_tree_root reada_extents;
|
|
|
|
/* disk I/O failure stats. For detailed description refer to
|
|
* enum btrfs_dev_stat_values in ioctl.h */
|
|
int dev_stats_valid;
|
|
|
|
/* Counter to record the change of device stats */
|
|
atomic_t dev_stats_ccnt;
|
|
atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
|
|
};
|
|
|
|
/*
|
|
* If we read those variants at the context of their own lock, we needn't
|
|
* use the following helpers, reading them directly is safe.
|
|
*/
|
|
#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
|
|
#define BTRFS_DEVICE_GETSET_FUNCS(name) \
|
|
static inline u64 \
|
|
btrfs_device_get_##name(const struct btrfs_device *dev) \
|
|
{ \
|
|
u64 size; \
|
|
unsigned int seq; \
|
|
\
|
|
do { \
|
|
seq = read_seqcount_begin(&dev->data_seqcount); \
|
|
size = dev->name; \
|
|
} while (read_seqcount_retry(&dev->data_seqcount, seq)); \
|
|
return size; \
|
|
} \
|
|
\
|
|
static inline void \
|
|
btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
|
|
{ \
|
|
preempt_disable(); \
|
|
write_seqcount_begin(&dev->data_seqcount); \
|
|
dev->name = size; \
|
|
write_seqcount_end(&dev->data_seqcount); \
|
|
preempt_enable(); \
|
|
}
|
|
#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPT)
|
|
#define BTRFS_DEVICE_GETSET_FUNCS(name) \
|
|
static inline u64 \
|
|
btrfs_device_get_##name(const struct btrfs_device *dev) \
|
|
{ \
|
|
u64 size; \
|
|
\
|
|
preempt_disable(); \
|
|
size = dev->name; \
|
|
preempt_enable(); \
|
|
return size; \
|
|
} \
|
|
\
|
|
static inline void \
|
|
btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
|
|
{ \
|
|
preempt_disable(); \
|
|
dev->name = size; \
|
|
preempt_enable(); \
|
|
}
|
|
#else
|
|
#define BTRFS_DEVICE_GETSET_FUNCS(name) \
|
|
static inline u64 \
|
|
btrfs_device_get_##name(const struct btrfs_device *dev) \
|
|
{ \
|
|
return dev->name; \
|
|
} \
|
|
\
|
|
static inline void \
|
|
btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
|
|
{ \
|
|
dev->name = size; \
|
|
}
|
|
#endif
|
|
|
|
BTRFS_DEVICE_GETSET_FUNCS(total_bytes);
|
|
BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);
|
|
BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
|
|
|
|
struct btrfs_fs_devices {
|
|
u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
|
|
|
|
u64 num_devices;
|
|
u64 open_devices;
|
|
u64 rw_devices;
|
|
u64 missing_devices;
|
|
u64 total_rw_bytes;
|
|
u64 total_devices;
|
|
struct block_device *latest_bdev;
|
|
|
|
/* all of the devices in the FS, protected by a mutex
|
|
* so we can safely walk it to write out the supers without
|
|
* worrying about add/remove by the multi-device code.
|
|
* Scrubbing super can kick off supers writing by holding
|
|
* this mutex lock.
|
|
*/
|
|
struct mutex device_list_mutex;
|
|
struct list_head devices;
|
|
|
|
struct list_head resized_devices;
|
|
/* devices not currently being allocated */
|
|
struct list_head alloc_list;
|
|
struct list_head list;
|
|
|
|
struct btrfs_fs_devices *seed;
|
|
int seeding;
|
|
|
|
int opened;
|
|
|
|
/* set when we find or add a device that doesn't have the
|
|
* nonrot flag set
|
|
*/
|
|
int rotating;
|
|
|
|
struct btrfs_fs_info *fs_info;
|
|
/* sysfs kobjects */
|
|
struct kobject fsid_kobj;
|
|
struct kobject *device_dir_kobj;
|
|
struct completion kobj_unregister;
|
|
};
|
|
|
|
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
|
|
|
|
/*
|
|
* we need the mirror number and stripe index to be passed around
|
|
* the call chain while we are processing end_io (especially errors).
|
|
* Really, what we need is a btrfs_bio structure that has this info
|
|
* and is properly sized with its stripe array, but we're not there
|
|
* quite yet. We have our own btrfs bioset, and all of the bios
|
|
* we allocate are actually btrfs_io_bios. We'll cram as much of
|
|
* struct btrfs_bio as we can into this over time.
|
|
*/
|
|
typedef void (btrfs_io_bio_end_io_t) (struct btrfs_io_bio *bio, int err);
|
|
struct btrfs_io_bio {
|
|
unsigned int mirror_num;
|
|
unsigned int stripe_index;
|
|
u64 logical;
|
|
u8 *csum;
|
|
u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
|
|
u8 *csum_allocated;
|
|
btrfs_io_bio_end_io_t *end_io;
|
|
struct bio bio;
|
|
};
|
|
|
|
static inline struct btrfs_io_bio *btrfs_io_bio(struct bio *bio)
|
|
{
|
|
return container_of(bio, struct btrfs_io_bio, bio);
|
|
}
|
|
|
|
struct btrfs_bio_stripe {
|
|
struct btrfs_device *dev;
|
|
u64 physical;
|
|
u64 length; /* only used for discard mappings */
|
|
};
|
|
|
|
struct btrfs_bio;
|
|
typedef void (btrfs_bio_end_io_t) (struct btrfs_bio *bio, int err);
|
|
|
|
struct btrfs_bio {
|
|
atomic_t refs;
|
|
atomic_t stripes_pending;
|
|
struct btrfs_fs_info *fs_info;
|
|
u64 map_type; /* get from map_lookup->type */
|
|
bio_end_io_t *end_io;
|
|
struct bio *orig_bio;
|
|
unsigned long flags;
|
|
void *private;
|
|
atomic_t error;
|
|
int max_errors;
|
|
int num_stripes;
|
|
int mirror_num;
|
|
int num_tgtdevs;
|
|
int *tgtdev_map;
|
|
/*
|
|
* logical block numbers for the start of each stripe
|
|
* The last one or two are p/q. These are sorted,
|
|
* so raid_map[0] is the start of our full stripe
|
|
*/
|
|
u64 *raid_map;
|
|
struct btrfs_bio_stripe stripes[];
|
|
};
|
|
|
|
struct btrfs_device_info {
|
|
struct btrfs_device *dev;
|
|
u64 dev_offset;
|
|
u64 max_avail;
|
|
u64 total_avail;
|
|
};
|
|
|
|
struct btrfs_raid_attr {
|
|
int sub_stripes; /* sub_stripes info for map */
|
|
int dev_stripes; /* stripes per dev */
|
|
int devs_max; /* max devs to use */
|
|
int devs_min; /* min devs needed */
|
|
int tolerated_failures; /* max tolerated fail devs */
|
|
int devs_increment; /* ndevs has to be a multiple of this */
|
|
int ncopies; /* how many copies to data has */
|
|
};
|
|
|
|
extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
|
|
extern const int btrfs_raid_mindev_error[BTRFS_NR_RAID_TYPES];
|
|
extern const u64 btrfs_raid_group[BTRFS_NR_RAID_TYPES];
|
|
|
|
struct map_lookup {
|
|
u64 type;
|
|
int io_align;
|
|
int io_width;
|
|
u64 stripe_len;
|
|
int sector_size;
|
|
int num_stripes;
|
|
int sub_stripes;
|
|
struct btrfs_bio_stripe stripes[];
|
|
};
|
|
|
|
#define map_lookup_size(n) (sizeof(struct map_lookup) + \
|
|
(sizeof(struct btrfs_bio_stripe) * (n)))
|
|
|
|
struct btrfs_balance_args;
|
|
struct btrfs_balance_progress;
|
|
struct btrfs_balance_control {
|
|
struct btrfs_fs_info *fs_info;
|
|
|
|
struct btrfs_balance_args data;
|
|
struct btrfs_balance_args meta;
|
|
struct btrfs_balance_args sys;
|
|
|
|
u64 flags;
|
|
|
|
struct btrfs_balance_progress stat;
|
|
};
|
|
|
|
int btrfs_account_dev_extents_size(struct btrfs_device *device, u64 start,
|
|
u64 end, u64 *length);
|
|
void btrfs_get_bbio(struct btrfs_bio *bbio);
|
|
void btrfs_put_bbio(struct btrfs_bio *bbio);
|
|
int btrfs_map_block(struct btrfs_fs_info *fs_info, int op,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_bio **bbio_ret, int mirror_num);
|
|
int btrfs_map_sblock(struct btrfs_fs_info *fs_info, int op,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_bio **bbio_ret, int mirror_num,
|
|
int need_raid_map);
|
|
int btrfs_rmap_block(struct btrfs_fs_info *fs_info,
|
|
u64 chunk_start, u64 physical, u64 devid,
|
|
u64 **logical, int *naddrs, int *stripe_len);
|
|
int btrfs_read_sys_array(struct btrfs_root *root);
|
|
int btrfs_read_chunk_tree(struct btrfs_root *root);
|
|
int btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *extent_root, u64 type);
|
|
void btrfs_mapping_init(struct btrfs_mapping_tree *tree);
|
|
void btrfs_mapping_tree_free(struct btrfs_mapping_tree *tree);
|
|
int btrfs_map_bio(struct btrfs_root *root, struct bio *bio,
|
|
int mirror_num, int async_submit);
|
|
int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
|
|
fmode_t flags, void *holder);
|
|
int btrfs_scan_one_device(const char *path, fmode_t flags, void *holder,
|
|
struct btrfs_fs_devices **fs_devices_ret);
|
|
int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
|
|
void btrfs_close_extra_devices(struct btrfs_fs_devices *fs_devices, int step);
|
|
void btrfs_assign_next_active_device(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *device, struct btrfs_device *this_dev);
|
|
int btrfs_find_device_missing_or_by_path(struct btrfs_root *root,
|
|
char *device_path,
|
|
struct btrfs_device **device);
|
|
int btrfs_find_device_by_devspec(struct btrfs_root *root, u64 devid,
|
|
char *devpath,
|
|
struct btrfs_device **device);
|
|
struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
|
|
const u64 *devid,
|
|
const u8 *uuid);
|
|
int btrfs_rm_device(struct btrfs_root *root, char *device_path, u64 devid);
|
|
void btrfs_cleanup_fs_uuids(void);
|
|
int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
|
|
int btrfs_grow_device(struct btrfs_trans_handle *trans,
|
|
struct btrfs_device *device, u64 new_size);
|
|
struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
|
|
u8 *uuid, u8 *fsid);
|
|
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
|
|
int btrfs_init_new_device(struct btrfs_root *root, char *path);
|
|
int btrfs_init_dev_replace_tgtdev(struct btrfs_root *root, char *device_path,
|
|
struct btrfs_device *srcdev,
|
|
struct btrfs_device **device_out);
|
|
int btrfs_balance(struct btrfs_balance_control *bctl,
|
|
struct btrfs_ioctl_balance_args *bargs);
|
|
int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info);
|
|
int btrfs_recover_balance(struct btrfs_fs_info *fs_info);
|
|
int btrfs_pause_balance(struct btrfs_fs_info *fs_info);
|
|
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
|
|
int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
|
|
int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
|
|
int btrfs_chunk_readonly(struct btrfs_root *root, u64 chunk_offset);
|
|
int find_free_dev_extent_start(struct btrfs_transaction *transaction,
|
|
struct btrfs_device *device, u64 num_bytes,
|
|
u64 search_start, u64 *start, u64 *max_avail);
|
|
int find_free_dev_extent(struct btrfs_trans_handle *trans,
|
|
struct btrfs_device *device, u64 num_bytes,
|
|
u64 *start, u64 *max_avail);
|
|
void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
|
|
int btrfs_get_dev_stats(struct btrfs_root *root,
|
|
struct btrfs_ioctl_get_dev_stats *stats);
|
|
void btrfs_init_devices_late(struct btrfs_fs_info *fs_info);
|
|
int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
|
|
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
|
|
struct btrfs_fs_info *fs_info);
|
|
void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *srcdev);
|
|
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *srcdev);
|
|
void btrfs_destroy_dev_replace_tgtdev(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *tgtdev);
|
|
void btrfs_init_dev_replace_tgtdev_for_resume(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *tgtdev);
|
|
void btrfs_scratch_superblocks(struct block_device *bdev, char *device_path);
|
|
int btrfs_is_parity_mirror(struct btrfs_mapping_tree *map_tree,
|
|
u64 logical, u64 len, int mirror_num);
|
|
unsigned long btrfs_full_stripe_len(struct btrfs_root *root,
|
|
struct btrfs_mapping_tree *map_tree,
|
|
u64 logical);
|
|
int btrfs_finish_chunk_alloc(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *extent_root,
|
|
u64 chunk_offset, u64 chunk_size);
|
|
int btrfs_remove_chunk(struct btrfs_trans_handle *trans,
|
|
struct btrfs_root *root, u64 chunk_offset);
|
|
|
|
static inline int btrfs_dev_stats_dirty(struct btrfs_device *dev)
|
|
{
|
|
return atomic_read(&dev->dev_stats_ccnt);
|
|
}
|
|
|
|
static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
|
|
int index)
|
|
{
|
|
atomic_inc(dev->dev_stat_values + index);
|
|
smp_mb__before_atomic();
|
|
atomic_inc(&dev->dev_stats_ccnt);
|
|
}
|
|
|
|
static inline int btrfs_dev_stat_read(struct btrfs_device *dev,
|
|
int index)
|
|
{
|
|
return atomic_read(dev->dev_stat_values + index);
|
|
}
|
|
|
|
static inline int btrfs_dev_stat_read_and_reset(struct btrfs_device *dev,
|
|
int index)
|
|
{
|
|
int ret;
|
|
|
|
ret = atomic_xchg(dev->dev_stat_values + index, 0);
|
|
smp_mb__before_atomic();
|
|
atomic_inc(&dev->dev_stats_ccnt);
|
|
return ret;
|
|
}
|
|
|
|
static inline void btrfs_dev_stat_set(struct btrfs_device *dev,
|
|
int index, unsigned long val)
|
|
{
|
|
atomic_set(dev->dev_stat_values + index, val);
|
|
smp_mb__before_atomic();
|
|
atomic_inc(&dev->dev_stats_ccnt);
|
|
}
|
|
|
|
static inline void btrfs_dev_stat_reset(struct btrfs_device *dev,
|
|
int index)
|
|
{
|
|
btrfs_dev_stat_set(dev, index, 0);
|
|
}
|
|
|
|
void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
|
|
void btrfs_update_commit_device_bytes_used(struct btrfs_root *root,
|
|
struct btrfs_transaction *transaction);
|
|
|
|
static inline void lock_chunks(struct btrfs_root *root)
|
|
{
|
|
mutex_lock(&root->fs_info->chunk_mutex);
|
|
}
|
|
|
|
static inline void unlock_chunks(struct btrfs_root *root)
|
|
{
|
|
mutex_unlock(&root->fs_info->chunk_mutex);
|
|
}
|
|
|
|
struct list_head *btrfs_get_fs_uuids(void);
|
|
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
|
|
void btrfs_reset_fs_info_ptr(struct btrfs_fs_info *fs_info);
|
|
|
|
#endif
|