typedef struct arc_buf_hdr arc_buf_hdr_t;
typedef struct arc_buf arc_buf_t;
typedef struct arc_prune arc_prune_t;
-typedef void arc_done_func_t(zio_t *zio, arc_buf_t *buf, void *private);
+
+/*
+ * Because the ARC can store encrypted data, errors (not due to bugs) may arise
+ * while transforming data into its desired format - specifically, when
+ * decrypting, the key may not be present, or the HMAC may not be correct
+ * which signifies deliberate tampering with the on-disk state
+ * (assuming that the checksum was correct). If any error occurs, the "buf"
+ * parameter will be NULL.
+ */
+typedef void arc_read_done_func_t(zio_t *zio, const zbookmark_phys_t *zb,
+ const blkptr_t *bp, arc_buf_t *buf, void *private);
+typedef void arc_write_done_func_t(zio_t *zio, arc_buf_t *buf, void *private);
typedef void arc_prune_func_t(int64_t bytes, void *private);
/* Shared module parameters */
extern int zfs_arc_average_blocksize;
/* generic arc_done_func_t's which you can use */
-arc_done_func_t arc_bcopy_func;
-arc_done_func_t arc_getbuf_func;
-
-extern int zfs_arc_num_sublists_per_state;
+arc_read_done_func_t arc_bcopy_func;
+arc_read_done_func_t arc_getbuf_func;
/* generic arc_prune_func_t wrapper for callbacks */
struct arc_prune {
void *p_private;
uint64_t p_adjust;
list_node_t p_node;
- refcount_t p_refcnt;
+ zfs_refcount_t p_refcnt;
};
typedef enum arc_strategy {
ARC_FLAG_CACHED = 1 << 3, /* I/O was in cache */
ARC_FLAG_L2CACHE = 1 << 4, /* cache in L2ARC */
ARC_FLAG_PREDICTIVE_PREFETCH = 1 << 5, /* I/O from zfetch */
+ ARC_FLAG_PRESCIENT_PREFETCH = 1 << 6, /* long min lifespan */
/*
* Private ARC flags. These flags are private ARC only flags that
* will show up in b_flags in the arc_hdr_buf_t. These flags should
* only be set by ARC code.
*/
- ARC_FLAG_IN_HASH_TABLE = 1 << 6, /* buffer is hashed */
- ARC_FLAG_IO_IN_PROGRESS = 1 << 7, /* I/O in progress */
- ARC_FLAG_IO_ERROR = 1 << 8, /* I/O failed for buf */
- ARC_FLAG_INDIRECT = 1 << 9, /* indirect block */
+ ARC_FLAG_IN_HASH_TABLE = 1 << 7, /* buffer is hashed */
+ ARC_FLAG_IO_IN_PROGRESS = 1 << 8, /* I/O in progress */
+ ARC_FLAG_IO_ERROR = 1 << 9, /* I/O failed for buf */
+ ARC_FLAG_INDIRECT = 1 << 10, /* indirect block */
/* Indicates that block was read with ASYNC priority. */
- ARC_FLAG_PRIO_ASYNC_READ = 1 << 10,
- ARC_FLAG_L2_WRITING = 1 << 11, /* write in progress */
- ARC_FLAG_L2_EVICTED = 1 << 12, /* evicted during I/O */
- ARC_FLAG_L2_WRITE_HEAD = 1 << 13, /* head of write list */
+ ARC_FLAG_PRIO_ASYNC_READ = 1 << 11,
+ ARC_FLAG_L2_WRITING = 1 << 12, /* write in progress */
+ ARC_FLAG_L2_EVICTED = 1 << 13, /* evicted during I/O */
+ ARC_FLAG_L2_WRITE_HEAD = 1 << 14, /* head of write list */
+ /*
+ * Encrypted or authenticated on disk (may be plaintext in memory).
+ * This header has b_crypt_hdr allocated. Does not include indirect
+ * blocks with checksums of MACs which will also have their X
+ * (encrypted) bit set in the bp.
+ */
+ ARC_FLAG_PROTECTED = 1 << 15,
+ /* data has not been authenticated yet */
+ ARC_FLAG_NOAUTH = 1 << 16,
/* indicates that the buffer contains metadata (otherwise, data) */
- ARC_FLAG_BUFC_METADATA = 1 << 14,
+ ARC_FLAG_BUFC_METADATA = 1 << 17,
/* Flags specifying whether optional hdr struct fields are defined */
- ARC_FLAG_HAS_L1HDR = 1 << 15,
- ARC_FLAG_HAS_L2HDR = 1 << 16,
+ ARC_FLAG_HAS_L1HDR = 1 << 18,
+ ARC_FLAG_HAS_L2HDR = 1 << 19,
/*
* Indicates the arc_buf_hdr_t's b_pdata matches the on-disk data.
* This allows the l2arc to use the blkptr's checksum to verify
* the data without having to store the checksum in the hdr.
*/
- ARC_FLAG_COMPRESSED_ARC = 1 << 17,
- ARC_FLAG_SHARED_DATA = 1 << 18,
+ ARC_FLAG_COMPRESSED_ARC = 1 << 20,
+ ARC_FLAG_SHARED_DATA = 1 << 21,
/*
* The arc buffer's compression mode is stored in the top 7 bits of the
typedef enum arc_buf_flags {
ARC_BUF_FLAG_SHARED = 1 << 0,
- ARC_BUF_FLAG_COMPRESSED = 1 << 1
+ ARC_BUF_FLAG_COMPRESSED = 1 << 1,
+ /*
+ * indicates whether this arc_buf_t is encrypted, regardless of
+ * state on-disk
+ */
+ ARC_BUF_FLAG_ENCRYPTED = 1 << 2
} arc_buf_flags_t;
struct arc_buf {
void arc_space_consume(uint64_t space, arc_space_type_t type);
void arc_space_return(uint64_t space, arc_space_type_t type);
boolean_t arc_is_metadata(arc_buf_t *buf);
+boolean_t arc_is_encrypted(arc_buf_t *buf);
+boolean_t arc_is_unauthenticated(arc_buf_t *buf);
enum zio_compress arc_get_compression(arc_buf_t *buf);
-int arc_decompress(arc_buf_t *buf);
+void arc_get_raw_params(arc_buf_t *buf, boolean_t *byteorder, uint8_t *salt,
+ uint8_t *iv, uint8_t *mac);
+int arc_untransform(arc_buf_t *buf, spa_t *spa, const zbookmark_phys_t *zb,
+ boolean_t in_place);
+void arc_convert_to_raw(arc_buf_t *buf, uint64_t dsobj, boolean_t byteorder,
+ dmu_object_type_t ot, const uint8_t *salt, const uint8_t *iv,
+ const uint8_t *mac);
arc_buf_t *arc_alloc_buf(spa_t *spa, void *tag, arc_buf_contents_t type,
int32_t size);
arc_buf_t *arc_alloc_compressed_buf(spa_t *spa, void *tag,
uint64_t psize, uint64_t lsize, enum zio_compress compression_type);
+arc_buf_t *arc_alloc_raw_buf(spa_t *spa, void *tag, uint64_t dsobj,
+ boolean_t byteorder, const uint8_t *salt, const uint8_t *iv,
+ const uint8_t *mac, dmu_object_type_t ot, uint64_t psize, uint64_t lsize,
+ enum zio_compress compression_type);
arc_buf_t *arc_loan_buf(spa_t *spa, boolean_t is_metadata, int size);
arc_buf_t *arc_loan_compressed_buf(spa_t *spa, uint64_t psize, uint64_t lsize,
enum zio_compress compression_type);
+arc_buf_t *arc_loan_raw_buf(spa_t *spa, uint64_t dsobj, boolean_t byteorder,
+ const uint8_t *salt, const uint8_t *iv, const uint8_t *mac,
+ dmu_object_type_t ot, uint64_t psize, uint64_t lsize,
+ enum zio_compress compression_type);
void arc_return_buf(arc_buf_t *buf, void *tag);
void arc_loan_inuse_buf(arc_buf_t *buf, void *tag);
void arc_buf_destroy(arc_buf_t *buf, void *tag);
void arc_buf_info(arc_buf_t *buf, arc_buf_info_t *abi, int state_index);
uint64_t arc_buf_size(arc_buf_t *buf);
uint64_t arc_buf_lsize(arc_buf_t *buf);
+void arc_buf_access(arc_buf_t *buf);
void arc_release(arc_buf_t *buf, void *tag);
int arc_released(arc_buf_t *buf);
void arc_buf_sigsegv(int sig, siginfo_t *si, void *unused);
#endif
int arc_read(zio_t *pio, spa_t *spa, const blkptr_t *bp,
- arc_done_func_t *done, void *private, zio_priority_t priority, int flags,
- arc_flags_t *arc_flags, const zbookmark_phys_t *zb);
+ arc_read_done_func_t *done, void *private, zio_priority_t priority,
+ int flags, arc_flags_t *arc_flags, const zbookmark_phys_t *zb);
zio_t *arc_write(zio_t *pio, spa_t *spa, uint64_t txg,
blkptr_t *bp, arc_buf_t *buf, boolean_t l2arc, const zio_prop_t *zp,
- arc_done_func_t *ready, arc_done_func_t *child_ready,
- arc_done_func_t *physdone, arc_done_func_t *done,
+ arc_write_done_func_t *ready, arc_write_done_func_t *child_ready,
+ arc_write_done_func_t *physdone, arc_write_done_func_t *done,
void *private, zio_priority_t priority, int zio_flags,
const zbookmark_phys_t *zb);
void arc_flush(spa_t *spa, boolean_t retry);
void arc_tempreserve_clear(uint64_t reserve);
-int arc_tempreserve_space(uint64_t reserve, uint64_t txg);
+int arc_tempreserve_space(spa_t *spa, uint64_t reserve, uint64_t txg);
-uint64_t arc_max_bytes(void);
+uint64_t arc_target_bytes(void);
void arc_init(void);
void arc_fini(void);