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Restructured the major interfaces of the filesystem

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This commit is contained in:
Christopher Haster
2017-03-25 16:20:31 -05:00
parent f566846223
commit 84a57642e5
8 changed files with 481 additions and 444 deletions
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20
lfs_bd.h
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@@ -16,10 +16,10 @@ typedef void lfs_bd_t;
// Description of block devices
struct lfs_bd_info {
lfs_size_t read_size; // Size of readable block
lfs_size_t write_size; // Size of programmable block
lfs_size_t prog_size; // Size of programmable block
lfs_size_t erase_size; // Size of erase block
lfs_lsize_t total_size; // Total size of the device
uint64_t total_size; // Total size of the device
};
// Block device operations
@@ -30,29 +30,29 @@ struct lfs_bd_info {
// block device
struct lfs_bd_ops {
// Read a block
lfs_error_t (*read)(lfs_bd_t *bd, uint8_t *buffer,
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
int (*read)(lfs_bd_t *bd, lfs_block_t block,
lfs_off_t off, lfs_size_t size, void *buffer);
// Program a block
//
// The block must have previously been erased.
lfs_error_t (*write)(lfs_bd_t *bd, const uint8_t *buffer,
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
int (*prog)(lfs_bd_t *bd, lfs_block_t block,
lfs_off_t off, lfs_size_t size, const void *buffer);
// Erase a block
//
// A block must be erased before being programmed. The
// state of an erased block is undefined.
lfs_error_t (*erase)(lfs_bd_t *bd,
lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
int (*erase)(lfs_bd_t *bd, lfs_block_t block,
lfs_off_t off, lfs_size_t size);
// Sync the block device
lfs_error_t (*sync)(lfs_bd_t *bd);
int (*sync)(lfs_bd_t *bd);
// Get a description of the block device
//
// Any unknown information may be left as zero
lfs_error_t (*info)(lfs_bd_t *bd, struct lfs_bd_info *info);
int (*info)(lfs_bd_t *bd, struct lfs_bd_info *info);
};