diff options
Diffstat (limited to 'include/sys')
| -rw-r--r-- | include/sys/dnode.h | 28 |
1 files changed, 25 insertions, 3 deletions
diff --git a/include/sys/dnode.h b/include/sys/dnode.h index 55b87bc39..fa0aa4bb7 100644 --- a/include/sys/dnode.h +++ b/include/sys/dnode.h @@ -138,9 +138,31 @@ typedef struct dnode_phys { uint64_t dn_pad3[4]; - blkptr_t dn_blkptr[1]; - uint8_t dn_bonus[DN_MAX_BONUSLEN - sizeof (blkptr_t)]; - blkptr_t dn_spill; + /* + * The tail region is 448 bytes, and there are three ways to + * look at it. + * + * 0 64 128 192 256 320 384 448 (offset) + * +---------------+---------------+---------------+-------+ + * | dn_blkptr[0] | dn_blkptr[1] | dn_blkptr[2] | / | + * +---------------+---------------+---------------+-------+ + * | dn_blkptr[0] | dn_bonus[0..319] | + * +---------------+-----------------------+---------------+ + * | dn_blkptr[0] | / | dn_spill | + * +---------------+-----------------------+---------------+ + */ + union { + blkptr_t dn_blkptr[1+DN_MAX_BONUSLEN/sizeof (blkptr_t)]; + struct { + blkptr_t __dn_ignore1; + uint8_t dn_bonus[DN_MAX_BONUSLEN]; + }; + struct { + blkptr_t __dn_ignore2; + uint8_t __dn_ignore3[DN_MAX_BONUSLEN-sizeof (blkptr_t)]; + blkptr_t dn_spill; + }; + }; } dnode_phys_t; typedef struct dnode { |