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-rw-r--r--fs/btrfs/volumes.h116
1 files changed, 27 insertions, 89 deletions
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index 099def5613b8..6b7a05f6cf82 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -6,10 +6,12 @@
#ifndef BTRFS_VOLUMES_H
#define BTRFS_VOLUMES_H
-#include <linux/bio.h>
#include <linux/sort.h>
#include <linux/btrfs.h>
#include "async-thread.h"
+#include "messages.h"
+#include "tree-checker.h"
+#include "rcu-string.h"
#define BTRFS_MAX_DATA_CHUNK_SIZE (10ULL * SZ_1G)
@@ -354,6 +356,8 @@ struct btrfs_fs_devices {
* nonrot flag set
*/
bool rotating;
+ /* Devices support TRIM/discard commands */
+ bool discardable;
struct btrfs_fs_info *fs_info;
/* sysfs kobjects */
@@ -368,8 +372,6 @@ struct btrfs_fs_devices {
enum btrfs_read_policy read_policy;
};
-#define BTRFS_BIO_INLINE_CSUM_SIZE 64
-
#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
@@ -379,89 +381,6 @@ struct btrfs_fs_devices {
- 2 * sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
-/*
- * Maximum number of sectors for a single bio to limit the size of the
- * checksum array. This matches the number of bio_vecs per bio and thus the
- * I/O size for buffered I/O.
- */
-#define BTRFS_MAX_BIO_SECTORS (256)
-
-typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio);
-
-/*
- * Additional info to pass along bio.
- *
- * Mostly for btrfs specific features like csum and mirror_num.
- */
-struct btrfs_bio {
- unsigned int mirror_num;
- struct bvec_iter iter;
-
- /* for direct I/O */
- u64 file_offset;
-
- /* @device is for stripe IO submission. */
- struct btrfs_device *device;
- u8 *csum;
- u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
-
- /* End I/O information supplied to btrfs_bio_alloc */
- btrfs_bio_end_io_t end_io;
- void *private;
-
- /* For read end I/O handling */
- struct work_struct end_io_work;
-
- /*
- * This member must come last, bio_alloc_bioset will allocate enough
- * bytes for entire btrfs_bio but relies on bio being last.
- */
- struct bio bio;
-};
-
-static inline struct btrfs_bio *btrfs_bio(struct bio *bio)
-{
- return container_of(bio, struct btrfs_bio, bio);
-}
-
-int __init btrfs_bioset_init(void);
-void __cold btrfs_bioset_exit(void);
-
-struct bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf,
- btrfs_bio_end_io_t end_io, void *private);
-struct bio *btrfs_bio_clone_partial(struct bio *orig, u64 offset, u64 size,
- btrfs_bio_end_io_t end_io, void *private);
-
-static inline void btrfs_bio_end_io(struct btrfs_bio *bbio, blk_status_t status)
-{
- bbio->bio.bi_status = status;
- bbio->end_io(bbio);
-}
-
-static inline void btrfs_bio_free_csum(struct btrfs_bio *bbio)
-{
- if (bbio->csum != bbio->csum_inline) {
- kfree(bbio->csum);
- bbio->csum = NULL;
- }
-}
-
-/*
- * Iterate through a btrfs_bio (@bbio) on a per-sector basis.
- *
- * bvl - struct bio_vec
- * bbio - struct btrfs_bio
- * iters - struct bvec_iter
- * bio_offset - unsigned int
- */
-#define btrfs_bio_for_each_sector(fs_info, bvl, bbio, iter, bio_offset) \
- for ((iter) = (bbio)->iter, (bio_offset) = 0; \
- (iter).bi_size && \
- (((bvl) = bio_iter_iovec((&(bbio)->bio), (iter))), 1); \
- (bio_offset) += fs_info->sectorsize, \
- bio_advance_iter_single(&(bbio)->bio, &(iter), \
- (fs_info)->sectorsize))
-
struct btrfs_io_stripe {
struct btrfs_device *dev;
union {
@@ -603,6 +522,13 @@ static inline enum btrfs_map_op btrfs_op(struct bio *bio)
}
}
+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,
@@ -611,6 +537,11 @@ int btrfs_map_block(struct btrfs_fs_info *fs_info, enum btrfs_map_op op,
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);
@@ -622,7 +553,6 @@ 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);
-void btrfs_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio, int mirror_num);
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,
@@ -639,8 +569,8 @@ 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 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,
@@ -741,6 +671,14 @@ static inline void btrfs_dev_stat_set(struct btrfs_device *dev,
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);
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-11 18:48:46 +0000