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f8a02dc6fd
Now that btrfs_get_io_geometry has a single caller, we can massage it into a form that is more suitable for that caller and remove the marshalling into and out of struct btrfs_io_geometry. Reviewed-by: Josef Bacik <josef@toxicpanda.com> Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: David Sterba <dsterba@suse.com>
682 lines
20 KiB
C
682 lines
20 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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*/
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#ifndef BTRFS_VOLUMES_H
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#define BTRFS_VOLUMES_H
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#include <linux/sort.h>
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#include <linux/btrfs.h>
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#include "async-thread.h"
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#include "messages.h"
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#include "tree-checker.h"
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#include "rcu-string.h"
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#define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G)
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extern struct mutex uuid_mutex;
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#define BTRFS_STRIPE_LEN SZ_64K
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/* Used by sanity check for btrfs_raid_types. */
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#define const_ffs(n) (__builtin_ctzll(n) + 1)
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/*
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* The conversion from BTRFS_BLOCK_GROUP_* bits to btrfs_raid_type requires
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* RAID0 always to be the lowest profile bit.
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* Although it's part of on-disk format and should never change, do extra
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* compile-time sanity checks.
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*/
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static_assert(const_ffs(BTRFS_BLOCK_GROUP_RAID0) <
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const_ffs(BTRFS_BLOCK_GROUP_PROFILE_MASK & ~BTRFS_BLOCK_GROUP_RAID0));
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static_assert(const_ilog2(BTRFS_BLOCK_GROUP_RAID0) >
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ilog2(BTRFS_BLOCK_GROUP_TYPE_MASK));
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/* ilog2() can handle both constants and variables */
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#define BTRFS_BG_FLAG_TO_INDEX(profile) \
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ilog2((profile) >> (ilog2(BTRFS_BLOCK_GROUP_RAID0) - 1))
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enum btrfs_raid_types {
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/* SINGLE is the special one as it doesn't have on-disk bit. */
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BTRFS_RAID_SINGLE = 0,
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BTRFS_RAID_RAID0 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID0),
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BTRFS_RAID_RAID1 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1),
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BTRFS_RAID_DUP = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_DUP),
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BTRFS_RAID_RAID10 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID10),
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BTRFS_RAID_RAID5 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID5),
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BTRFS_RAID_RAID6 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID6),
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BTRFS_RAID_RAID1C3 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1C3),
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BTRFS_RAID_RAID1C4 = BTRFS_BG_FLAG_TO_INDEX(BTRFS_BLOCK_GROUP_RAID1C4),
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BTRFS_NR_RAID_TYPES
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};
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/*
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* Use sequence counter to get consistent device stat data on
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* 32-bit processors.
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*/
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#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
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#include <linux/seqlock.h>
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#define __BTRFS_NEED_DEVICE_DATA_ORDERED
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#define btrfs_device_data_ordered_init(device) \
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seqcount_init(&device->data_seqcount)
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#else
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#define btrfs_device_data_ordered_init(device) do { } while (0)
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#endif
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#define BTRFS_DEV_STATE_WRITEABLE (0)
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#define BTRFS_DEV_STATE_IN_FS_METADATA (1)
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#define BTRFS_DEV_STATE_MISSING (2)
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#define BTRFS_DEV_STATE_REPLACE_TGT (3)
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#define BTRFS_DEV_STATE_FLUSH_SENT (4)
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#define BTRFS_DEV_STATE_NO_READA (5)
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struct btrfs_zoned_device_info;
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struct btrfs_device {
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struct list_head dev_list; /* device_list_mutex */
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struct list_head dev_alloc_list; /* chunk mutex */
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struct list_head post_commit_list; /* chunk mutex */
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struct btrfs_fs_devices *fs_devices;
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struct btrfs_fs_info *fs_info;
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struct rcu_string __rcu *name;
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u64 generation;
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struct block_device *bdev;
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struct btrfs_zoned_device_info *zone_info;
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/* the mode sent to blkdev_get */
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fmode_t mode;
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/*
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* Device's major-minor number. Must be set even if the device is not
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* opened (bdev == NULL), unless the device is missing.
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*/
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dev_t devt;
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unsigned long dev_state;
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blk_status_t last_flush_error;
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#ifdef __BTRFS_NEED_DEVICE_DATA_ORDERED
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seqcount_t data_seqcount;
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#endif
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/* the internal btrfs device id */
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u64 devid;
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/* size of the device in memory */
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u64 total_bytes;
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/* size of the device on disk */
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u64 disk_total_bytes;
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/* bytes used */
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u64 bytes_used;
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/* optimal io alignment for this device */
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u32 io_align;
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/* optimal io width for this device */
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u32 io_width;
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/* type and info about this device */
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u64 type;
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/* minimal io size for this device */
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u32 sector_size;
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/* physical drive uuid (or lvm uuid) */
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u8 uuid[BTRFS_UUID_SIZE];
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/*
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* size of the device on the current transaction
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*
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* This variant is update when committing the transaction,
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* and protected by chunk mutex
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*/
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u64 commit_total_bytes;
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/* bytes used on the current transaction */
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u64 commit_bytes_used;
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/* Bio used for flushing device barriers */
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struct bio flush_bio;
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struct completion flush_wait;
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/* per-device scrub information */
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struct scrub_ctx *scrub_ctx;
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/* disk I/O failure stats. For detailed description refer to
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* enum btrfs_dev_stat_values in ioctl.h */
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int dev_stats_valid;
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/* Counter to record the change of device stats */
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atomic_t dev_stats_ccnt;
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atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
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struct extent_io_tree alloc_state;
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struct completion kobj_unregister;
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/* For sysfs/FSID/devinfo/devid/ */
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struct kobject devid_kobj;
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/* Bandwidth limit for scrub, in bytes */
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u64 scrub_speed_max;
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};
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/*
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* Block group or device which contains an active swapfile. Used for preventing
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* unsafe operations while a swapfile is active.
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*
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* These are sorted on (ptr, inode) (note that a block group or device can
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* contain more than one swapfile). We compare the pointer values because we
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* don't actually care what the object is, we just need a quick check whether
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* the object exists in the rbtree.
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*/
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struct btrfs_swapfile_pin {
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struct rb_node node;
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void *ptr;
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struct inode *inode;
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/*
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* If true, ptr points to a struct btrfs_block_group. Otherwise, ptr
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* points to a struct btrfs_device.
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*/
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bool is_block_group;
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/*
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* Only used when 'is_block_group' is true and it is the number of
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* extents used by a swapfile for this block group ('ptr' field).
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*/
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int bg_extent_count;
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};
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/*
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* If we read those variants at the context of their own lock, we needn't
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* use the following helpers, reading them directly is safe.
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*/
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#if BITS_PER_LONG==32 && defined(CONFIG_SMP)
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#define BTRFS_DEVICE_GETSET_FUNCS(name) \
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static inline u64 \
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btrfs_device_get_##name(const struct btrfs_device *dev) \
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{ \
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u64 size; \
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unsigned int seq; \
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\
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do { \
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seq = read_seqcount_begin(&dev->data_seqcount); \
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size = dev->name; \
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} while (read_seqcount_retry(&dev->data_seqcount, seq)); \
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return size; \
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} \
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\
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static inline void \
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btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
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{ \
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preempt_disable(); \
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write_seqcount_begin(&dev->data_seqcount); \
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dev->name = size; \
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write_seqcount_end(&dev->data_seqcount); \
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preempt_enable(); \
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}
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#elif BITS_PER_LONG==32 && defined(CONFIG_PREEMPTION)
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#define BTRFS_DEVICE_GETSET_FUNCS(name) \
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static inline u64 \
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btrfs_device_get_##name(const struct btrfs_device *dev) \
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{ \
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u64 size; \
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\
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preempt_disable(); \
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size = dev->name; \
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preempt_enable(); \
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return size; \
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} \
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\
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static inline void \
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btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
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{ \
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preempt_disable(); \
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dev->name = size; \
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preempt_enable(); \
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}
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#else
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#define BTRFS_DEVICE_GETSET_FUNCS(name) \
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static inline u64 \
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btrfs_device_get_##name(const struct btrfs_device *dev) \
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{ \
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return dev->name; \
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} \
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\
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static inline void \
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btrfs_device_set_##name(struct btrfs_device *dev, u64 size) \
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{ \
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dev->name = size; \
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}
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#endif
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BTRFS_DEVICE_GETSET_FUNCS(total_bytes);
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BTRFS_DEVICE_GETSET_FUNCS(disk_total_bytes);
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BTRFS_DEVICE_GETSET_FUNCS(bytes_used);
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enum btrfs_chunk_allocation_policy {
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BTRFS_CHUNK_ALLOC_REGULAR,
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BTRFS_CHUNK_ALLOC_ZONED,
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};
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/*
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* Read policies for mirrored block group profiles, read picks the stripe based
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* on these policies.
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*/
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enum btrfs_read_policy {
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/* Use process PID to choose the stripe */
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BTRFS_READ_POLICY_PID,
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BTRFS_NR_READ_POLICY,
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};
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struct btrfs_fs_devices {
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u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */
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u8 metadata_uuid[BTRFS_FSID_SIZE];
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bool fsid_change;
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struct list_head fs_list;
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/*
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* Number of devices under this fsid including missing and
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* replace-target device and excludes seed devices.
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*/
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u64 num_devices;
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/*
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* The number of devices that successfully opened, including
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* replace-target, excludes seed devices.
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*/
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u64 open_devices;
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/* The number of devices that are under the chunk allocation list. */
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u64 rw_devices;
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/* Count of missing devices under this fsid excluding seed device. */
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u64 missing_devices;
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u64 total_rw_bytes;
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/*
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* Count of devices from btrfs_super_block::num_devices for this fsid,
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* which includes the seed device, excludes the transient replace-target
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* device.
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*/
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u64 total_devices;
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/* Highest generation number of seen devices */
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u64 latest_generation;
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/*
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* The mount device or a device with highest generation after removal
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* or replace.
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*/
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struct btrfs_device *latest_dev;
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/* all of the devices in the FS, protected by a mutex
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* so we can safely walk it to write out the supers without
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* worrying about add/remove by the multi-device code.
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* Scrubbing super can kick off supers writing by holding
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* this mutex lock.
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*/
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struct mutex device_list_mutex;
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/* List of all devices, protected by device_list_mutex */
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struct list_head devices;
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/*
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* Devices which can satisfy space allocation. Protected by
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* chunk_mutex
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*/
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struct list_head alloc_list;
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struct list_head seed_list;
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bool seeding;
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int opened;
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/* set when we find or add a device that doesn't have the
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* nonrot flag set
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*/
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bool rotating;
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/* Devices support TRIM/discard commands */
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bool discardable;
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struct btrfs_fs_info *fs_info;
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/* sysfs kobjects */
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struct kobject fsid_kobj;
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struct kobject *devices_kobj;
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struct kobject *devinfo_kobj;
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struct completion kobj_unregister;
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enum btrfs_chunk_allocation_policy chunk_alloc_policy;
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/* Policy used to read the mirrored stripes */
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enum btrfs_read_policy read_policy;
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};
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#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \
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- sizeof(struct btrfs_chunk)) \
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/ sizeof(struct btrfs_stripe) + 1)
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#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \
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- 2 * sizeof(struct btrfs_disk_key) \
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- 2 * sizeof(struct btrfs_chunk)) \
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/ sizeof(struct btrfs_stripe) + 1)
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struct btrfs_io_stripe {
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struct btrfs_device *dev;
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union {
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/* Block mapping */
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u64 physical;
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/* For the endio handler */
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struct btrfs_io_context *bioc;
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};
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};
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struct btrfs_discard_stripe {
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struct btrfs_device *dev;
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u64 physical;
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u64 length;
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};
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/*
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* Context for IO subsmission for device stripe.
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*
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* - Track the unfinished mirrors for mirror based profiles
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* Mirror based profiles are SINGLE/DUP/RAID1/RAID10.
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*
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* - Contain the logical -> physical mapping info
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* Used by submit_stripe_bio() for mapping logical bio
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* into physical device address.
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*
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* - Contain device replace info
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* Used by handle_ops_on_dev_replace() to copy logical bios
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* into the new device.
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*
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* - Contain RAID56 full stripe logical bytenrs
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*/
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struct btrfs_io_context {
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refcount_t refs;
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struct btrfs_fs_info *fs_info;
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u64 map_type; /* get from map_lookup->type */
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struct bio *orig_bio;
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atomic_t error;
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int max_errors;
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int num_stripes;
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int mirror_num;
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int num_tgtdevs;
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int *tgtdev_map;
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/*
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* logical block numbers for the start of each stripe
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* The last one or two are p/q. These are sorted,
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* so raid_map[0] is the start of our full stripe
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*/
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u64 *raid_map;
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struct btrfs_io_stripe stripes[];
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};
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struct btrfs_device_info {
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struct btrfs_device *dev;
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u64 dev_offset;
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u64 max_avail;
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u64 total_avail;
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};
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struct btrfs_raid_attr {
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u8 sub_stripes; /* sub_stripes info for map */
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u8 dev_stripes; /* stripes per dev */
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u8 devs_max; /* max devs to use */
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u8 devs_min; /* min devs needed */
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u8 tolerated_failures; /* max tolerated fail devs */
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u8 devs_increment; /* ndevs has to be a multiple of this */
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u8 ncopies; /* how many copies to data has */
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u8 nparity; /* number of stripes worth of bytes to store
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* parity information */
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u8 mindev_error; /* error code if min devs requisite is unmet */
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const char raid_name[8]; /* name of the raid */
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u64 bg_flag; /* block group flag of the raid */
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};
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extern const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES];
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struct map_lookup {
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u64 type;
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int io_align;
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int io_width;
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u32 stripe_len;
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int num_stripes;
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int sub_stripes;
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int verified_stripes; /* For mount time dev extent verification */
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struct btrfs_io_stripe stripes[];
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};
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#define map_lookup_size(n) (sizeof(struct map_lookup) + \
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(sizeof(struct btrfs_io_stripe) * (n)))
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struct btrfs_balance_args;
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struct btrfs_balance_progress;
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struct btrfs_balance_control {
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struct btrfs_balance_args data;
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struct btrfs_balance_args meta;
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struct btrfs_balance_args sys;
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u64 flags;
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struct btrfs_balance_progress stat;
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};
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/*
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* Search for a given device by the set parameters
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*/
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struct btrfs_dev_lookup_args {
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u64 devid;
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u8 *uuid;
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u8 *fsid;
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bool missing;
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};
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/* We have to initialize to -1 because BTRFS_DEV_REPLACE_DEVID is 0 */
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#define BTRFS_DEV_LOOKUP_ARGS_INIT { .devid = (u64)-1 }
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#define BTRFS_DEV_LOOKUP_ARGS(name) \
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struct btrfs_dev_lookup_args name = BTRFS_DEV_LOOKUP_ARGS_INIT
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enum btrfs_map_op {
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BTRFS_MAP_READ,
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BTRFS_MAP_WRITE,
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BTRFS_MAP_DISCARD,
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BTRFS_MAP_GET_READ_MIRRORS,
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};
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static inline enum btrfs_map_op btrfs_op(struct bio *bio)
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{
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switch (bio_op(bio)) {
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case REQ_OP_DISCARD:
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return BTRFS_MAP_DISCARD;
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case REQ_OP_WRITE:
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case REQ_OP_ZONE_APPEND:
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return BTRFS_MAP_WRITE;
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default:
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WARN_ON_ONCE(1);
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fallthrough;
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case REQ_OP_READ:
|
|
return BTRFS_MAP_READ;
|
|
}
|
|
}
|
|
|
|
static inline unsigned long btrfs_chunk_item_size(int num_stripes)
|
|
{
|
|
ASSERT(num_stripes);
|
|
return sizeof(struct btrfs_chunk) +
|
|
sizeof(struct btrfs_stripe) * (num_stripes - 1);
|
|
}
|
|
|
|
void btrfs_get_bioc(struct btrfs_io_context *bioc);
|
|
void btrfs_put_bioc(struct btrfs_io_context *bioc);
|
|
int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_io_context **bioc_ret, int mirror_num);
|
|
int btrfs_map_sblock(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_io_context **bioc_ret);
|
|
int __btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
|
|
u64 logical, u64 *length,
|
|
struct btrfs_io_context **bioc_ret,
|
|
struct btrfs_io_stripe *smap, int *mirror_num_ret,
|
|
int need_raid_map);
|
|
struct btrfs_discard_stripe *btrfs_map_discard(struct btrfs_fs_info *fs_info,
|
|
u64 logical, u64 *length_ret,
|
|
u32 *num_stripes);
|
|
int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
|
|
int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
|
|
struct btrfs_block_group *btrfs_create_chunk(struct btrfs_trans_handle *trans,
|
|
u64 type);
|
|
void btrfs_mapping_tree_free(struct extent_map_tree *tree);
|
|
int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
|
|
fmode_t flags, void *holder);
|
|
struct btrfs_device *btrfs_scan_one_device(const char *path,
|
|
fmode_t flags, void *holder);
|
|
int btrfs_forget_devices(dev_t devt);
|
|
void btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
|
|
void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices);
|
|
void btrfs_assign_next_active_device(struct btrfs_device *device,
|
|
struct btrfs_device *this_dev);
|
|
struct btrfs_device *btrfs_find_device_by_devspec(struct btrfs_fs_info *fs_info,
|
|
u64 devid,
|
|
const char *devpath);
|
|
int btrfs_get_dev_args_from_path(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_dev_lookup_args *args,
|
|
const char *path);
|
|
struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
|
|
const u64 *devid, const u8 *uuid,
|
|
const char *path);
|
|
void btrfs_put_dev_args_from_path(struct btrfs_dev_lookup_args *args);
|
|
void btrfs_free_device(struct btrfs_device *device);
|
|
int btrfs_rm_device(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_dev_lookup_args *args,
|
|
struct block_device **bdev, fmode_t *mode);
|
|
void __exit 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(const struct btrfs_fs_devices *fs_devices,
|
|
const struct btrfs_dev_lookup_args *args);
|
|
int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
|
|
int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path);
|
|
int btrfs_balance(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_balance_control *bctl,
|
|
struct btrfs_ioctl_balance_args *bargs);
|
|
void btrfs_describe_block_groups(u64 flags, char *buf, u32 size_buf);
|
|
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_relocate_chunk(struct btrfs_fs_info *fs_info, u64 chunk_offset);
|
|
int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
|
|
int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
|
|
int btrfs_uuid_scan_kthread(void *data);
|
|
bool btrfs_chunk_writeable(struct btrfs_fs_info *fs_info, u64 chunk_offset);
|
|
int find_free_dev_extent(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_fs_info *fs_info,
|
|
struct btrfs_ioctl_get_dev_stats *stats);
|
|
int 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);
|
|
void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev);
|
|
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev);
|
|
void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev);
|
|
int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info,
|
|
u64 logical, u64 len);
|
|
unsigned long btrfs_full_stripe_len(struct btrfs_fs_info *fs_info,
|
|
u64 logical);
|
|
u64 btrfs_calc_stripe_length(const struct extent_map *em);
|
|
int btrfs_nr_parity_stripes(u64 type);
|
|
int btrfs_chunk_alloc_add_chunk_item(struct btrfs_trans_handle *trans,
|
|
struct btrfs_block_group *bg);
|
|
int btrfs_remove_chunk(struct btrfs_trans_handle *trans, u64 chunk_offset);
|
|
struct extent_map *btrfs_get_chunk_map(struct btrfs_fs_info *fs_info,
|
|
u64 logical, u64 length);
|
|
void btrfs_release_disk_super(struct btrfs_super_block *super);
|
|
|
|
static inline void btrfs_dev_stat_inc(struct btrfs_device *dev,
|
|
int index)
|
|
{
|
|
atomic_inc(dev->dev_stat_values + index);
|
|
/*
|
|
* This memory barrier orders stores updating statistics before stores
|
|
* updating dev_stats_ccnt.
|
|
*
|
|
* It pairs with smp_rmb() in btrfs_run_dev_stats().
|
|
*/
|
|
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);
|
|
/*
|
|
* atomic_xchg implies a full memory barriers as per atomic_t.txt:
|
|
* - RMW operations that have a return value are fully ordered;
|
|
*
|
|
* This implicit memory barriers is paired with the smp_rmb in
|
|
* btrfs_run_dev_stats
|
|
*/
|
|
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);
|
|
/*
|
|
* This memory barrier orders stores updating statistics before stores
|
|
* updating dev_stats_ccnt.
|
|
*
|
|
* It pairs with smp_rmb() in btrfs_run_dev_stats().
|
|
*/
|
|
smp_mb__before_atomic();
|
|
atomic_inc(&dev->dev_stats_ccnt);
|
|
}
|
|
|
|
static inline const char *btrfs_dev_name(const struct btrfs_device *device)
|
|
{
|
|
if (!device || test_bit(BTRFS_DEV_STATE_MISSING, &device->dev_state))
|
|
return "<missing disk>";
|
|
else
|
|
return rcu_str_deref(device->name);
|
|
}
|
|
|
|
void btrfs_commit_device_sizes(struct btrfs_transaction *trans);
|
|
|
|
struct list_head * __attribute_const__ btrfs_get_fs_uuids(void);
|
|
bool btrfs_check_rw_degradable(struct btrfs_fs_info *fs_info,
|
|
struct btrfs_device *failing_dev);
|
|
void btrfs_scratch_superblocks(struct btrfs_fs_info *fs_info,
|
|
struct block_device *bdev,
|
|
const char *device_path);
|
|
|
|
enum btrfs_raid_types __attribute_const__ btrfs_bg_flags_to_raid_index(u64 flags);
|
|
int btrfs_bg_type_to_factor(u64 flags);
|
|
const char *btrfs_bg_type_to_raid_name(u64 flags);
|
|
int btrfs_verify_dev_extents(struct btrfs_fs_info *fs_info);
|
|
bool btrfs_repair_one_zone(struct btrfs_fs_info *fs_info, u64 logical);
|
|
|
|
bool btrfs_pinned_by_swapfile(struct btrfs_fs_info *fs_info, void *ptr);
|
|
|
|
#endif
|