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Illumos 4951 - ZFS administrative commands should use reserved space

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4951 ZFS administrative commands should use reserved space, not with ENOSPC
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Reviewed by: Dan McDonald <danmcd@omniti.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  https://www.illumos.org/issues/4373
  https://github.com/illumos/illumos-gate/commit/7d46dc6

Ported by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Matthew Ahrens
2014-11-03 12:28:43 -08:00
committed by Brian Behlendorf
parent cfec5b17b3
commit 3d45fdd6c0
18 changed files with 164 additions and 67 deletions
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include/sys/dsl_synctask.h
+36 -6
View File
@@ -20,7 +20,7 @@
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012 by Delphix. All rights reserved.
* Copyright (c) 2012, 2014 by Delphix. All rights reserved.
*/
#ifndef _SYS_DSL_SYNCTASK_H
@@ -38,11 +38,41 @@ struct dsl_pool;
typedef int (dsl_checkfunc_t)(void *, dmu_tx_t *);
typedef void (dsl_syncfunc_t)(void *, dmu_tx_t *);
typedef enum zfs_space_check {
/*
* Normal space check: if there is less than 3.2% free space,
* the operation will fail. Operations which are logically
* creating things should use this (e.g. "zfs create", "zfs snapshot").
* User writes (via the ZPL / ZVOL) also fail at this point.
*/
ZFS_SPACE_CHECK_NORMAL,
/*
* Space check allows use of half the slop space. If there
* is less than 1.6% free space, the operation will fail. Most
* operations should use this (e.g. "zfs set", "zfs rename"),
* because we want them to succeed even after user writes are failing,
* so that they can be used as part of the space recovery process.
*/
ZFS_SPACE_CHECK_RESERVED,
/*
* No space check is performed. Only operations which we expect to
* result in a net reduction in space should use this
* (e.g. "zfs destroy". Setting quotas & reservations also uses
* this because it needs to circumvent the quota/reservation checks).
*
* See also the comments above spa_slop_shift.
*/
ZFS_SPACE_CHECK_NONE,
} zfs_space_check_t;
typedef struct dsl_sync_task {
txg_node_t dst_node;
struct dsl_pool *dst_pool;
uint64_t dst_txg;
int dst_space;
zfs_space_check_t dst_space_check;
dsl_checkfunc_t *dst_checkfunc;
dsl_syncfunc_t *dst_syncfunc;
void *dst_arg;
@@ -50,11 +80,11 @@ typedef struct dsl_sync_task {
boolean_t dst_nowaiter;
} dsl_sync_task_t;
void dsl_sync_task_sync(dsl_sync_task_t *dst, dmu_tx_t *tx);
int dsl_sync_task(const char *pool, dsl_checkfunc_t *checkfunc,
dsl_syncfunc_t *syncfunc, void *arg, int blocks_modified);
void dsl_sync_task_nowait(struct dsl_pool *dp, dsl_syncfunc_t *syncfunc,
void *arg, int blocks_modified, dmu_tx_t *tx);
void dsl_sync_task_sync(dsl_sync_task_t *, dmu_tx_t *);
int dsl_sync_task(const char *, dsl_checkfunc_t *,
dsl_syncfunc_t *, void *, int, zfs_space_check_t);
void dsl_sync_task_nowait(struct dsl_pool *, dsl_syncfunc_t *,
void *, int, zfs_space_check_t, dmu_tx_t *);
#ifdef __cplusplus
}