diff options
Diffstat (limited to 'fs/btrfs/misc.h')
| -rw-r--r-- | fs/btrfs/misc.h | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/fs/btrfs/misc.h b/fs/btrfs/misc.h index ff5eac84d819..60f9b000d644 100644 --- a/fs/btrfs/misc.h +++ b/fs/btrfs/misc.h @@ -11,6 +11,7 @@ #include <linux/pagemap.h> #include <linux/math64.h> #include <linux/rbtree.h> +#include <linux/bio.h> /* * Enumerate bits using enum autoincrement. Define the @name as the n-th bit. @@ -20,6 +21,54 @@ name = (1U << __ ## name ## _BIT), \ __ ## name ## _SEQ = __ ## name ## _BIT +static inline phys_addr_t bio_iter_phys(struct bio *bio, struct bvec_iter *iter) +{ + struct bio_vec bv = bio_iter_iovec(bio, *iter); + + return bvec_phys(&bv); +} + +/* + * Iterate bio using btrfs block size. + * + * This will handle large folio and highmem. + * + * @paddr: Physical memory address of each iteration + * @bio: The bio to iterate + * @iter: The bvec_iter (pointer) to use. + * @blocksize: The blocksize to iterate. + * + * This requires all folios in the bio to cover at least one block. + */ +#define btrfs_bio_for_each_block(paddr, bio, iter, blocksize) \ + for (; (iter)->bi_size && \ + (paddr = bio_iter_phys((bio), (iter)), 1); \ + bio_advance_iter_single((bio), (iter), (blocksize))) + +/* Initialize a bvec_iter to the size of the specified bio. */ +static inline struct bvec_iter init_bvec_iter_for_bio(struct bio *bio) +{ + struct bio_vec *bvec; + u32 bio_size = 0; + int i; + + bio_for_each_bvec_all(bvec, bio, i) + bio_size += bvec->bv_len; + + return (struct bvec_iter) { + .bi_sector = 0, + .bi_size = bio_size, + .bi_idx = 0, + .bi_bvec_done = 0, + }; +} + +#define btrfs_bio_for_each_block_all(paddr, bio, blocksize) \ + for (struct bvec_iter iter = init_bvec_iter_for_bio(bio); \ + (iter).bi_size && \ + (paddr = bio_iter_phys((bio), &(iter)), 1); \ + bio_advance_iter_single((bio), &(iter), (blocksize))) + static inline void cond_wake_up(struct wait_queue_head *wq) { /* |