diff options
Diffstat (limited to 'include/sys')
| -rw-r--r-- | include/sys/spa.h | 12 | ||||
| -rw-r--r-- | include/sys/space_map.h | 114 |
2 files changed, 90 insertions, 36 deletions
diff --git a/include/sys/spa.h b/include/sys/spa.h index b6483e11b..4a3fc71f7 100644 --- a/include/sys/spa.h +++ b/include/sys/spa.h @@ -153,6 +153,7 @@ _NOTE(CONSTCOND) } while (0) #define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */ #define SPA_COMPRESSBITS 7 +#define SPA_VDEVBITS 24 /* * All SPA data is represented by 128-bit data virtual addresses (DVAs). @@ -177,15 +178,15 @@ typedef struct zio_cksum_salt { * * 64 56 48 40 32 24 16 8 0 * +-------+-------+-------+-------+-------+-------+-------+-------+ - * 0 | vdev1 | GRID | ASIZE | + * 0 | pad | vdev1 | GRID | ASIZE | * +-------+-------+-------+-------+-------+-------+-------+-------+ * 1 |G| offset1 | * +-------+-------+-------+-------+-------+-------+-------+-------+ - * 2 | vdev2 | GRID | ASIZE | + * 2 | pad | vdev2 | GRID | ASIZE | * +-------+-------+-------+-------+-------+-------+-------+-------+ * 3 |G| offset2 | * +-------+-------+-------+-------+-------+-------+-------+-------+ - * 4 | vdev3 | GRID | ASIZE | + * 4 | pad | vdev3 | GRID | ASIZE | * +-------+-------+-------+-------+-------+-------+-------+-------+ * 5 |G| offset3 | * +-------+-------+-------+-------+-------+-------+-------+-------+ @@ -443,8 +444,9 @@ typedef struct blkptr { #define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8) #define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x) -#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32) -#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x) +#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, SPA_VDEVBITS) +#define DVA_SET_VDEV(dva, x) \ + BF64_SET((dva)->dva_word[0], 32, SPA_VDEVBITS, x) #define DVA_GET_OFFSET(dva) \ BF64_GET_SB((dva)->dva_word[1], 0, 63, SPA_MINBLOCKSHIFT, 0) diff --git a/include/sys/space_map.h b/include/sys/space_map.h index 98b87269c..64c97bb4d 100644 --- a/include/sys/space_map.h +++ b/include/sys/space_map.h @@ -93,50 +93,100 @@ typedef struct space_map { /* * debug entry * - * 1 3 10 50 - * ,---+--------+------------+---------------------------------. - * | 1 | action | syncpass | txg (lower bits) | - * `---+--------+------------+---------------------------------' - * 63 62 60 59 50 49 0 + * 2 2 10 50 + * +-----+-----+------------+----------------------------------+ + * | 1 0 | act | syncpass | txg (lower bits) | + * +-----+-----+------------+----------------------------------+ + * 63 62 61 60 59 50 49 0 * * - * non-debug entry + * one-word entry * * 1 47 1 15 - * ,-----------------------------------------------------------. + * +-----------------------------------------------------------+ * | 0 | offset (sm_shift units) | type | run | - * `-----------------------------------------------------------' - * 63 62 17 16 15 0 + * +-----------------------------------------------------------+ + * 63 62 16 15 14 0 + * + * + * two-word entry + * + * 2 2 36 24 + * +-----+-----+---------------------------+-------------------+ + * | 1 1 | pad | run | vdev | + * +-----+-----+---------------------------+-------------------+ + * 63 62 61 60 59 24 23 0 + * + * 1 63 + * +------+----------------------------------------------------+ + * | type | offset | + * +------+----------------------------------------------------+ + * 63 62 0 + * + * Note that a two-word entry will not straddle a block boundary. + * If necessary, the last word of a block will be padded with a + * debug entry (with act = syncpass = txg = 0). */ -/* All this stuff takes and returns bytes */ -#define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, 15) + 1) -#define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, 15) -#define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1) -#define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1) -#define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, 47) -#define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, 47) -#define SM_DEBUG_DECODE(x) BF64_DECODE(x, 63, 1) -#define SM_DEBUG_ENCODE(x) BF64_ENCODE(x, 63, 1) +typedef enum { + SM_ALLOC, + SM_FREE +} maptype_t; + +typedef struct space_map_entry { + maptype_t sme_type; + uint32_t sme_vdev; /* max is 2^24-1; SM_NO_VDEVID if not present */ + uint64_t sme_offset; /* max is 2^63-1; units of sm_shift */ + uint64_t sme_run; /* max is 2^36; units of sm_shift */ +} space_map_entry_t; + +#define SM_NO_VDEVID (1 << SPA_VDEVBITS) -#define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 3) -#define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 3) +/* one-word entry constants */ +#define SM_DEBUG_PREFIX 2 +#define SM_OFFSET_BITS 47 +#define SM_RUN_BITS 15 +/* two-word entry constants */ +#define SM2_PREFIX 3 +#define SM2_OFFSET_BITS 63 +#define SM2_RUN_BITS 36 + +#define SM_PREFIX_DECODE(x) BF64_DECODE(x, 62, 2) +#define SM_PREFIX_ENCODE(x) BF64_ENCODE(x, 62, 2) + +#define SM_DEBUG_ACTION_DECODE(x) BF64_DECODE(x, 60, 2) +#define SM_DEBUG_ACTION_ENCODE(x) BF64_ENCODE(x, 60, 2) #define SM_DEBUG_SYNCPASS_DECODE(x) BF64_DECODE(x, 50, 10) #define SM_DEBUG_SYNCPASS_ENCODE(x) BF64_ENCODE(x, 50, 10) - #define SM_DEBUG_TXG_DECODE(x) BF64_DECODE(x, 0, 50) #define SM_DEBUG_TXG_ENCODE(x) BF64_ENCODE(x, 0, 50) -#define SM_RUN_MAX SM_RUN_DECODE(~0ULL) - -typedef enum { - SM_ALLOC, - SM_FREE -} maptype_t; - -typedef int (*sm_cb_t)(maptype_t type, uint64_t offset, uint64_t size, - void *arg); +#define SM_OFFSET_DECODE(x) BF64_DECODE(x, 16, SM_OFFSET_BITS) +#define SM_OFFSET_ENCODE(x) BF64_ENCODE(x, 16, SM_OFFSET_BITS) +#define SM_TYPE_DECODE(x) BF64_DECODE(x, 15, 1) +#define SM_TYPE_ENCODE(x) BF64_ENCODE(x, 15, 1) +#define SM_RUN_DECODE(x) (BF64_DECODE(x, 0, SM_RUN_BITS) + 1) +#define SM_RUN_ENCODE(x) BF64_ENCODE((x) - 1, 0, SM_RUN_BITS) +#define SM_RUN_MAX SM_RUN_DECODE(~0ULL) +#define SM_OFFSET_MAX SM_OFFSET_DECODE(~0ULL) + +#define SM2_RUN_DECODE(x) (BF64_DECODE(x, SPA_VDEVBITS, SM2_RUN_BITS) + 1) +#define SM2_RUN_ENCODE(x) BF64_ENCODE((x) - 1, SPA_VDEVBITS, SM2_RUN_BITS) +#define SM2_VDEV_DECODE(x) BF64_DECODE(x, 0, SPA_VDEVBITS) +#define SM2_VDEV_ENCODE(x) BF64_ENCODE(x, 0, SPA_VDEVBITS) +#define SM2_TYPE_DECODE(x) BF64_DECODE(x, SM2_OFFSET_BITS, 1) +#define SM2_TYPE_ENCODE(x) BF64_ENCODE(x, SM2_OFFSET_BITS, 1) +#define SM2_OFFSET_DECODE(x) BF64_DECODE(x, 0, SM2_OFFSET_BITS) +#define SM2_OFFSET_ENCODE(x) BF64_ENCODE(x, 0, SM2_OFFSET_BITS) +#define SM2_RUN_MAX SM2_RUN_DECODE(~0ULL) +#define SM2_OFFSET_MAX SM2_OFFSET_DECODE(~0ULL) + +boolean_t sm_entry_is_debug(uint64_t e); +boolean_t sm_entry_is_single_word(uint64_t e); +boolean_t sm_entry_is_double_word(uint64_t e); + +typedef int (*sm_cb_t)(space_map_entry_t *sme, void *arg); int space_map_load(space_map_t *sm, range_tree_t *rt, maptype_t maptype); int space_map_iterate(space_map_t *sm, sm_cb_t callback, void *arg); @@ -154,7 +204,9 @@ uint64_t space_map_allocated(space_map_t *sm); uint64_t space_map_length(space_map_t *sm); void space_map_write(space_map_t *sm, range_tree_t *rt, maptype_t maptype, - dmu_tx_t *tx); + uint64_t vdev_id, dmu_tx_t *tx); +uint64_t space_map_estimate_optimal_size(space_map_t *sm, range_tree_t *rt, + uint64_t vdev_id); void space_map_truncate(space_map_t *sm, int blocksize, dmu_tx_t *tx); uint64_t space_map_alloc(objset_t *os, int blocksize, dmu_tx_t *tx); void space_map_free(space_map_t *sm, dmu_tx_t *tx); |