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![Qu Wenruo](/assets/img/avatar_default.png)
These two functions play a big role in btrfs bootstrap. The following function is removed: - Seed device support Although in theory we can still support multiple devices, we don't have a facility in U-Boot to do device scan without opening them. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Marek Behún <marek.behun@nic.cz>
205 lines
5.4 KiB
C
205 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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#ifndef __BTRFS_VOLUMES_H__
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#define __BTRFS_VOLUMES_H__
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#include <fs_internal.h>
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#include "ctree.h"
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#define BTRFS_STRIPE_LEN SZ_64K
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struct btrfs_device {
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struct list_head dev_list;
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struct btrfs_root *dev_root;
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struct btrfs_fs_devices *fs_devices;
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struct blk_desc *desc;
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struct disk_partition *part;
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u64 total_devs;
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u64 super_bytes_used;
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u64 generation;
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/* the internal btrfs device id */
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u64 devid;
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/* size of the device */
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u64 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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/* minimal io size for this device */
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u32 sector_size;
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/* type and info about this device */
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u64 type;
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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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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]; /* FS specific uuid */
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u64 latest_devid;
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u64 lowest_devid;
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u64 latest_trans;
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u64 total_rw_bytes;
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struct list_head devices;
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struct list_head list;
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int seeding;
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struct btrfs_fs_devices *seed;
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};
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struct btrfs_bio_stripe {
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struct btrfs_device *dev;
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u64 physical;
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};
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struct btrfs_multi_bio {
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int error;
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int num_stripes;
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struct btrfs_bio_stripe stripes[];
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};
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struct map_lookup {
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struct cache_extent ce;
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u64 type;
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int io_align;
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int io_width;
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int stripe_len;
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int sector_size;
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int num_stripes;
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int sub_stripes;
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struct btrfs_bio_stripe stripes[];
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};
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struct btrfs_raid_attr {
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int sub_stripes; /* sub_stripes info for map */
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int dev_stripes; /* stripes per dev */
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int devs_max; /* max devs to use */
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int devs_min; /* min devs needed */
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int tolerated_failures; /* max tolerated fail devs */
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int devs_increment; /* ndevs has to be a multiple of this */
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int ncopies; /* how many copies to data has */
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int nparity; /* number of stripes worth of bytes to store
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* parity information */
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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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static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
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{
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if (flags & BTRFS_BLOCK_GROUP_RAID10)
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return BTRFS_RAID_RAID10;
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else if (flags & BTRFS_BLOCK_GROUP_RAID1)
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return BTRFS_RAID_RAID1;
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else if (flags & BTRFS_BLOCK_GROUP_RAID1C3)
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return BTRFS_RAID_RAID1C3;
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else if (flags & BTRFS_BLOCK_GROUP_RAID1C4)
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return BTRFS_RAID_RAID1C4;
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else if (flags & BTRFS_BLOCK_GROUP_DUP)
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return BTRFS_RAID_DUP;
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else if (flags & BTRFS_BLOCK_GROUP_RAID0)
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return BTRFS_RAID_RAID0;
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else if (flags & BTRFS_BLOCK_GROUP_RAID5)
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return BTRFS_RAID_RAID5;
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else if (flags & BTRFS_BLOCK_GROUP_RAID6)
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return BTRFS_RAID_RAID6;
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return BTRFS_RAID_SINGLE; /* BTRFS_BLOCK_GROUP_SINGLE */
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}
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#define btrfs_multi_bio_size(n) (sizeof(struct btrfs_multi_bio) + \
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(sizeof(struct btrfs_bio_stripe) * (n)))
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#define btrfs_map_lookup_size(n) (sizeof(struct map_lookup) + \
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(sizeof(struct btrfs_bio_stripe) * (n)))
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#define BTRFS_RAID5_P_STRIPE ((u64)-2)
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#define BTRFS_RAID6_Q_STRIPE ((u64)-1)
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static inline u64 calc_stripe_length(u64 type, u64 length, int num_stripes)
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{
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u64 stripe_size;
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if (type & BTRFS_BLOCK_GROUP_RAID0) {
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stripe_size = length;
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stripe_size /= num_stripes;
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} else if (type & BTRFS_BLOCK_GROUP_RAID10) {
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stripe_size = length * 2;
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stripe_size /= num_stripes;
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} else if (type & BTRFS_BLOCK_GROUP_RAID5) {
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stripe_size = length;
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stripe_size /= (num_stripes - 1);
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} else if (type & BTRFS_BLOCK_GROUP_RAID6) {
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stripe_size = length;
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stripe_size /= (num_stripes - 2);
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} else {
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stripe_size = length;
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}
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return stripe_size;
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}
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#ifndef READ
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#define READ 0
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#define WRITE 1
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#define READA 2
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#endif
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int __btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
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u64 logical, u64 *length, u64 *type,
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struct btrfs_multi_bio **multi_ret, int mirror_num,
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u64 **raid_map);
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int btrfs_map_block(struct btrfs_fs_info *fs_info, int rw,
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u64 logical, u64 *length,
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struct btrfs_multi_bio **multi_ret, int mirror_num,
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u64 **raid_map_ret);
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int btrfs_next_bg(struct btrfs_fs_info *map_tree, u64 *logical,
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u64 *size, u64 type);
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static inline int btrfs_next_bg_metadata(struct btrfs_fs_info *fs_info,
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u64 *logical, u64 *size)
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{
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return btrfs_next_bg(fs_info, logical, size,
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BTRFS_BLOCK_GROUP_METADATA);
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}
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static inline int btrfs_next_bg_system(struct btrfs_fs_info *fs_info,
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u64 *logical, u64 *size)
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{
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return btrfs_next_bg(fs_info, logical, size,
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BTRFS_BLOCK_GROUP_SYSTEM);
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}
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int btrfs_read_sys_array(struct btrfs_fs_info *fs_info);
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int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info);
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int btrfs_open_devices(struct btrfs_fs_devices *fs_devices);
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int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
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void btrfs_close_all_devices(void);
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int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
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int btrfs_scan_one_device(struct blk_desc *desc, struct disk_partition *part,
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struct btrfs_fs_devices **fs_devices_ret,
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u64 *total_devs);
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struct list_head *btrfs_scanned_uuids(void);
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struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
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u8 *uuid, u8 *fsid);
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int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
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struct extent_buffer *leaf,
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struct btrfs_chunk *chunk,
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int slot, u64 logical);
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u64 btrfs_stripe_length(struct btrfs_fs_info *fs_info,
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struct extent_buffer *leaf,
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struct btrfs_chunk *chunk);
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#endif
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