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Better pack struct zio_prop

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By using precisely sized fields it is possible to reduce the size
of this structure and respectively struct zio it is included into
by 40 bytes (from 92 to 52).

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: George Melikov <mail@gmelikov.ru>
Reviewed-by: Rob Norris <robn@despairlabs.com>
Signed-off-by: Alexander Motin <alexander.motin@TrueNAS.com>
Closes #17619
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Alexander Motin 2025-08-12 16:28:46 -04:00 committed by GitHub
parent 531568f438
commit e0e60d319c
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1 changed files with 13 additions and 13 deletions
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26
include/sys/zio.h
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@ -360,26 +360,26 @@ struct zbookmark_err_phys {
(zb)->zb_blkid == ZB_ROOT_BLKID) (zb)->zb_blkid == ZB_ROOT_BLKID)
typedef struct zio_prop { typedef struct zio_prop {
enum zio_checksum zp_checksum; enum zio_checksum zp_checksum:8;
enum zio_compress zp_compress; enum zio_compress zp_compress:8;
uint8_t zp_complevel; uint8_t zp_complevel;
uint8_t zp_level; uint8_t zp_level;
uint8_t zp_copies; uint8_t zp_copies;
uint8_t zp_gang_copies; uint8_t zp_gang_copies;
dmu_object_type_t zp_type; dmu_object_type_t zp_type:8;
boolean_t zp_dedup; dmu_object_type_t zp_storage_type:8;
boolean_t zp_dedup_verify; boolean_t zp_dedup:1;
boolean_t zp_nopwrite; boolean_t zp_dedup_verify:1;
boolean_t zp_brtwrite; boolean_t zp_nopwrite:1;
boolean_t zp_encrypt; boolean_t zp_brtwrite:1;
boolean_t zp_byteorder; boolean_t zp_encrypt:1;
boolean_t zp_direct_write; boolean_t zp_byteorder:1;
boolean_t zp_rewrite; boolean_t zp_direct_write:1;
boolean_t zp_rewrite:1;
uint32_t zp_zpl_smallblk;
uint8_t zp_salt[ZIO_DATA_SALT_LEN]; uint8_t zp_salt[ZIO_DATA_SALT_LEN];
uint8_t zp_iv[ZIO_DATA_IV_LEN]; uint8_t zp_iv[ZIO_DATA_IV_LEN];
uint8_t zp_mac[ZIO_DATA_MAC_LEN]; uint8_t zp_mac[ZIO_DATA_MAC_LEN];
uint32_t zp_zpl_smallblk;
dmu_object_type_t zp_storage_type;
} zio_prop_t; } zio_prop_t;
typedef struct zio_cksum_report zio_cksum_report_t; typedef struct zio_cksum_report zio_cksum_report_t;