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zfs: com.delphix:embedded_data feature support

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This commit is contained in:
Toomas Soome 2015-04-16 08:23:22 +03:00 committed by Andrei Borzenkov
parent a1007c6af2
commit 4a7ea4003b
2 changed files with 93 additions and 18 deletions
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60
grub-core/fs/zfs/zfs.c
View file

@ -282,6 +282,7 @@ grub_crypto_cipher_handle_t (*grub_zfs_load_key) (const struct grub_zfs_key *key
static const char *spa_feature_names[] = {
"org.illumos:lz4_compress",
"com.delphix:hole_birth",
"com.delphix:embedded_data",
NULL
};
@ -1802,6 +1803,39 @@ zio_read_data (blkptr_t * bp, grub_zfs_endian_t endian, void *buf,
return err;
}
/*
* buf must be at least BPE_GET_PSIZE(bp) bytes long (which will never be
* more than BPE_PAYLOAD_SIZE bytes).
*/
static grub_err_t
decode_embedded_bp_compressed(const blkptr_t *bp, void *buf)
{
grub_size_t psize, i;
grub_uint8_t *buf8 = buf;
grub_uint64_t w = 0;
const grub_uint64_t *bp64 = (const grub_uint64_t *)bp;
psize = BPE_GET_PSIZE(bp);
/*
* Decode the words of the block pointer into the byte array.
* Low bits of first word are the first byte (little endian).
*/
for (i = 0; i < psize; i++)
{
if (i % sizeof (w) == 0)
{
/* beginning of a word */
w = *bp64;
bp64++;
if (!BPE_IS_PAYLOADWORD(bp, bp64))
bp64++;
}
buf8[i] = BF64_GET(w, (i % sizeof (w)) * 8, 8);
}
return GRUB_ERR_NONE;
}
/*
* Read in a block of data, verify its checksum, decompress if needed,
* and put the uncompressed data in buf.
@ -1820,12 +1854,26 @@ zio_read (blkptr_t *bp, grub_zfs_endian_t endian, void **buf,
*buf = NULL;
checksum = (grub_zfs_to_cpu64((bp)->blk_prop, endian) >> 40) & 0xff;
comp = (grub_zfs_to_cpu64((bp)->blk_prop, endian)>>32) & 0xff;
comp = (grub_zfs_to_cpu64((bp)->blk_prop, endian)>>32) & 0x7f;
encrypted = ((grub_zfs_to_cpu64((bp)->blk_prop, endian) >> 60) & 3);
if (BP_IS_EMBEDDED(bp))
{
if (BPE_GET_ETYPE(bp) != BP_EMBEDDED_TYPE_DATA)
return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
"unsupported embedded BP (type=%u)\n",
BPE_GET_ETYPE(bp));
lsize = BPE_GET_LSIZE(bp);
psize = BF64_GET_SB(grub_zfs_to_cpu64 ((bp)->blk_prop, endian), 25, 7, 0, 1);
}
else
{
lsize = (BP_IS_HOLE(bp) ? 0 :
(((grub_zfs_to_cpu64 ((bp)->blk_prop, endian) & 0xffff) + 1)
<< SPA_MINBLOCKSHIFT));
psize = get_psize (bp, endian);
}
grub_dprintf("zfs", "zio_read: E %d: size %" PRIdGRUB_SSIZE "/%"
PRIdGRUB_SSIZE "\n", (int)BP_IS_EMBEDDED(bp), lsize, psize);
if (size)
*size = lsize;
@ -1849,15 +1897,22 @@ zio_read (blkptr_t *bp, grub_zfs_endian_t endian, void **buf,
compbuf = *buf = grub_malloc (lsize);
grub_dprintf ("zfs", "endian = %d\n", endian);
if (BP_IS_EMBEDDED(bp))
err = decode_embedded_bp_compressed(bp, compbuf);
else
{
err = zio_read_data (bp, endian, compbuf, data);
grub_memset (compbuf, 0, ALIGN_UP (psize, 16) - psize);
}
if (err)
{
grub_free (compbuf);
*buf = NULL;
return err;
}
grub_memset (compbuf, 0, ALIGN_UP (psize, 16) - psize);
if (!BP_IS_EMBEDDED(bp))
{
err = zio_checksum_verify (zc, checksum, endian,
compbuf, psize);
if (err)
@ -1867,6 +1922,7 @@ zio_read (blkptr_t *bp, grub_zfs_endian_t endian, void **buf,
*buf = NULL;
return err;
}
}
if (encrypted)
{

27
include/grub/zfs/spa.h
View file

@ -126,7 +126,7 @@ typedef struct zio_cksum {
* +-------+-------+-------+-------+-------+-------+-------+-------+
* 5 |G| offset3 |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE |
* 6 |BDX|lvl| type | cksum |E| comp| PSIZE | LSIZE |
* +-------+-------+-------+-------+-------+-------+-------+-------+
* 7 | padding |
* +-------+-------+-------+-------+-------+-------+-------+-------+
@ -160,7 +160,8 @@ typedef struct zio_cksum {
* G gang block indicator
* B byteorder (endianness)
* D dedup
* X unused
* X encryption
* E blkptr_t contains embedded data
* lvl level of indirection
* type DMU object type
* phys birth txg of block allocation; zero if same as logical birth txg
@ -203,8 +204,8 @@ typedef struct blkptr {
#define BP_SET_LSIZE(bp, x) \
BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)
#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 7)
#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 7, x)
#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)
@ -215,6 +216,8 @@ typedef struct blkptr {
#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)
#define BP_IS_EMBEDDED(bp) BF64_GET((bp)->blk_prop, 39, 1)
#define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
#define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)
@ -277,6 +280,22 @@ typedef struct blkptr {
(zcp)->zc_word[3] = w3; \
}
#define BPE_GET_ETYPE(bp) BP_GET_CHECKSUM(bp)
#define BPE_GET_LSIZE(bp) \
BF64_GET_SB((bp)->blk_prop, 0, 25, 0, 1)
#define BPE_GET_PSIZE(bp) \
BF64_GET_SB((bp)->blk_prop, 25, 7, 0, 1)
typedef enum bp_embedded_type {
BP_EMBEDDED_TYPE_DATA,
NUM_BP_EMBEDDED_TYPES
} bp_embedded_type_t;
#define BPE_NUM_WORDS 14
#define BPE_PAYLOAD_SIZE (BPE_NUM_WORDS * sizeof(grub_uint64_t))
#define BPE_IS_PAYLOADWORD(bp, wp) \
((wp) != &(bp)->blk_prop && (wp) != &(bp)->blk_birth)
#define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
#define DVA_IS_EMPTY(dva) ((dva)->dva_word[0] == 0ULL && \