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Add dmu_tx_hold_append() interface

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Provides an interface which callers can use to declare a write when
the exact starting offset in not yet known.  Since the full range
being updated is not available only the first L0 block at the
provided offset will be prefetched.

Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #14819
This commit is contained in:
Brian Behlendorf
2023-05-09 09:03:10 -07:00
parent 7c555fee9d
commit 133faca275
3 changed files with 109 additions and 0 deletions
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include/sys/dmu.h
+3
View File
@@ -778,6 +778,9 @@ dmu_tx_t *dmu_tx_create(objset_t *os);
void dmu_tx_hold_write(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
void dmu_tx_hold_write_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
int len);
void dmu_tx_hold_append(dmu_tx_t *tx, uint64_t object, uint64_t off, int len);
void dmu_tx_hold_append_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
int len);
void dmu_tx_hold_free(dmu_tx_t *tx, uint64_t object, uint64_t off,
uint64_t len);
void dmu_tx_hold_free_by_dnode(dmu_tx_t *tx, dnode_t *dn, uint64_t off,
include/sys/dmu_tx.h
+1
View File
@@ -90,6 +90,7 @@ enum dmu_tx_hold_type {
THT_ZAP,
THT_SPACE,
THT_SPILL,
THT_APPEND,
THT_NUMTYPES
};