diff options
| author | Will Andrews <[email protected]> | 2013-06-11 09:12:34 -0800 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2013-11-04 10:55:25 -0800 |
| commit | e49f1e20a09181d03382d64afdc4b7a12a5dfdf1 (patch) | |
| tree | 301457b83154f25be39a6135f797ca5cb83daf1e /include/sys/dmu.h | |
| parent | b1118acbb16ec347f6a3eb091d9b7097d12b8d54 (diff) | |
Illumos #3741
3741 zfs needs better comments
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: Eric Schrock <[email protected]>
Approved by: Christopher Siden <[email protected]>
References:
https://www.illumos.org/issues/3741
illumos/illumos-gate@3e30c24aeefdee1631958ecf17f18da671781956
Ported-by: Richard Yao <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Issue #1775
Diffstat (limited to 'include/sys/dmu.h')
| -rw-r--r-- | include/sys/dmu.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/sys/dmu.h b/include/sys/dmu.h index 60d4aa58a..0dd7e2835 100644 --- a/include/sys/dmu.h +++ b/include/sys/dmu.h @@ -407,6 +407,8 @@ void dmu_write_policy(objset_t *os, struct dnode *dn, int level, int wp, * object must be held in an assigned transaction before calling * dmu_buf_will_dirty. You may use dmu_buf_set_user() on the bonus * buffer as well. You must release what you hold with dmu_buf_rele(). + * + * Returns ENOENT, EIO, or 0. */ int dmu_bonus_hold(objset_t *os, uint64_t object, void *tag, dmu_buf_t **); int dmu_bonus_max(void); @@ -662,8 +664,14 @@ extern const dmu_object_byteswap_info_t dmu_ot_byteswap[DMU_BSWAP_NUMFUNCS]; */ int dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi); void __dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi); +/* Like dmu_object_info, but faster if you have a held dnode in hand. */ void dmu_object_info_from_dnode(struct dnode *dn, dmu_object_info_t *doi); +/* Like dmu_object_info, but faster if you have a held dbuf in hand. */ void dmu_object_info_from_db(dmu_buf_t *db, dmu_object_info_t *doi); +/* + * Like dmu_object_info_from_db, but faster still when you only care about + * the size. This is specifically optimized for zfs_getattr(). + */ void dmu_object_size_from_db(dmu_buf_t *db, uint32_t *blksize, u_longlong_t *nblk512); |