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Illumos #3464

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3464 zfs synctask code needs restructuring
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Reviewed by: Adam Leventhal <ahl@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: Christopher Siden <christopher.siden@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>

References:
  https://www.illumos.org/issues/3464
  illumos/illumos-gate@3b2aab1880

Ported-by: Tim Chase <tim@chase2k.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #1495
This commit is contained in:
Matthew Ahrens
2013-09-04 07:00:57 -05:00
committed by Brian Behlendorf
parent 6f1ffb0665
commit 13fe019870
86 changed files with 6425 additions and 6043 deletions
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include/sys/dsl_dataset.h
+51 -63
View File
@@ -35,6 +35,7 @@
#include <sys/dsl_synctask.h>
#include <sys/zfs_context.h>
#include <sys/dsl_deadlist.h>
#include <sys/refcount.h>
#ifdef __cplusplus
extern "C" {
@@ -48,10 +49,8 @@ struct dsl_pool;
#define DS_IS_INCONSISTENT(ds) \
((ds)->ds_phys->ds_flags & DS_FLAG_INCONSISTENT)
/*
* NB: nopromote can not yet be set, but we want support for it in this
* on-disk version, so that we don't need to upgrade for it later. It
* will be needed when we implement 'zfs split' (where the split off
* clone should not be promoted).
* Note: nopromote can not yet be set, but we want support for it in this
* on-disk version, so that we don't need to upgrade for it later.
*/
#define DS_FLAG_NOPROMOTE (1ULL<<1)
@@ -76,6 +75,8 @@ struct dsl_pool;
*/
#define DS_FLAG_CI_DATASET (1ULL<<16)
#define DS_CREATE_FLAG_NODIRTY (1ULL<<24)
typedef struct dsl_dataset_phys {
uint64_t ds_dir_obj; /* DMU_OT_DSL_DIR */
uint64_t ds_prev_snap_obj; /* DMU_OT_DSL_DATASET */
@@ -125,9 +126,6 @@ typedef struct dsl_dataset {
dsl_deadlist_t ds_deadlist;
bplist_t ds_pending_deadlist;
/* to protect against multiple concurrent incremental recv */
kmutex_t ds_recvlock;
/* protected by lock on pool's dp_dirty_datasets list */
txg_node_t ds_dirty_link;
list_node_t ds_synced_link;
@@ -139,13 +137,15 @@ typedef struct dsl_dataset {
kmutex_t ds_lock;
objset_t *ds_objset;
uint64_t ds_userrefs;
void *ds_owner;
/*
* ds_owner is protected by the ds_rwlock and the ds_lock
* Long holds prevent the ds from being destroyed; they allow the
* ds to remain held even after dropping the dp_config_rwlock.
* Owning counts as a long hold. See the comments above
* dsl_pool_hold() for details.
*/
krwlock_t ds_rwlock;
kcondvar_t ds_exclusive_cv;
void *ds_owner;
refcount_t ds_longholds;
/* no locking; only for making guesses */
uint64_t ds_trysnap_txg;
@@ -163,76 +163,42 @@ typedef struct dsl_dataset {
char ds_snapname[MAXNAMELEN];
} dsl_dataset_t;
struct dsl_ds_destroyarg {
dsl_dataset_t *ds; /* ds to destroy */
dsl_dataset_t *rm_origin; /* also remove our origin? */
boolean_t is_origin_rm; /* set if removing origin snap */
boolean_t defer; /* destroy -d requested? */
boolean_t releasing; /* destroying due to release? */
boolean_t need_prep; /* do we need to retry due to EBUSY? */
};
/*
* The max length of a temporary tag prefix is the number of hex digits
* required to express UINT64_MAX plus one for the hyphen.
*/
#define MAX_TAG_PREFIX_LEN 17
struct dsl_ds_holdarg {
dsl_sync_task_group_t *dstg;
const char *htag;
char *snapname;
boolean_t recursive;
boolean_t gotone;
boolean_t temphold;
char failed[MAXPATHLEN];
};
#define dsl_dataset_is_snapshot(ds) \
((ds)->ds_phys->ds_num_children != 0)
#define DS_UNIQUE_IS_ACCURATE(ds) \
(((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp);
int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
void *tag, dsl_dataset_t **);
int dsl_dataset_own(const char *name, boolean_t inconsistentok,
int dsl_dataset_hold(struct dsl_pool *dp, const char *name, void *tag,
dsl_dataset_t **dsp);
int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj, void *tag,
dsl_dataset_t **);
void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
int dsl_dataset_own(struct dsl_pool *dp, const char *name,
void *tag, dsl_dataset_t **dsp);
int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
void dsl_dataset_name(dsl_dataset_t *ds, char *name);
void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
void *tag, dsl_dataset_t **dsp);
void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
void *tag);
void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag);
void dsl_dataset_name(dsl_dataset_t *ds, char *name);
boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, void *tag);
void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
minor_t minor);
uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
uint64_t flags, dmu_tx_t *tx);
int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
dsl_checkfunc_t dsl_dataset_destroy_check;
dsl_syncfunc_t dsl_dataset_destroy_sync;
dsl_syncfunc_t dsl_dataset_user_hold_sync;
int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
int dsl_dataset_promote(const char *name, char *conflsnap);
int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head,
boolean_t force);
int dsl_dataset_user_hold(char *dsname, char *snapname, char *htag,
boolean_t recursive, boolean_t temphold, int cleanup_fd);
int dsl_dataset_user_hold_for_send(dsl_dataset_t *ds, char *htag,
boolean_t temphold);
int dsl_dataset_user_release(char *dsname, char *snapname, char *htag,
boolean_t recursive);
int dsl_dataset_user_release_tmp(struct dsl_pool *dp, uint64_t dsobj,
char *htag, boolean_t retry);
int dsl_dataset_get_holds(const char *dsname, nvlist_t **nvp);
int dsl_dataset_rename_snapshot(const char *fsname,
const char *oldsnapname, const char *newsnapname, boolean_t recursive);
int dsl_dataset_snapshot_tmp(const char *fsname, const char *snapname,
minor_t cleanup_minor, const char *htag);
blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds);
void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx);
@@ -271,13 +237,35 @@ int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf);
int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota,
uint64_t asize, uint64_t inflight, uint64_t *used,
uint64_t *ref_rsrv);
int dsl_dataset_set_quota(const char *dsname, zprop_source_t source,
int dsl_dataset_set_refquota(const char *dsname, zprop_source_t source,
uint64_t quota);
dsl_syncfunc_t dsl_dataset_set_quota_sync;
int dsl_dataset_set_reservation(const char *dsname, zprop_source_t source,
int dsl_dataset_set_refreservation(const char *dsname, zprop_source_t source,
uint64_t reservation);
int dsl_destroy_inconsistent(const char *dsname, void *arg);
boolean_t dsl_dataset_is_before(dsl_dataset_t *later, dsl_dataset_t *earlier);
void dsl_dataset_long_hold(dsl_dataset_t *ds, void *tag);
void dsl_dataset_long_rele(dsl_dataset_t *ds, void *tag);
boolean_t dsl_dataset_long_held(dsl_dataset_t *ds);
int dsl_dataset_clone_swap_check_impl(dsl_dataset_t *clone,
dsl_dataset_t *origin_head, boolean_t force);
void dsl_dataset_clone_swap_sync_impl(dsl_dataset_t *clone,
dsl_dataset_t *origin_head, dmu_tx_t *tx);
int dsl_dataset_snapshot_check_impl(dsl_dataset_t *ds, const char *snapname,
dmu_tx_t *tx);
void dsl_dataset_snapshot_sync_impl(dsl_dataset_t *ds, const char *snapname,
dmu_tx_t *tx);
void dsl_dataset_remove_from_next_clones(dsl_dataset_t *ds, uint64_t obj,
dmu_tx_t *tx);
void dsl_dataset_recalc_head_uniq(dsl_dataset_t *ds);
int dsl_dataset_get_snapname(dsl_dataset_t *ds);
int dsl_dataset_snap_lookup(dsl_dataset_t *ds, const char *name,
uint64_t *value);
int dsl_dataset_snap_remove(dsl_dataset_t *ds, const char *name, dmu_tx_t *tx);
void dsl_dataset_set_refreservation_sync_impl(dsl_dataset_t *ds,
zprop_source_t source, uint64_t value, dmu_tx_t *tx);
int dsl_dataset_rollback(const char *fsname);
#ifdef ZFS_DEBUG
#define dprintf_ds(ds, fmt, ...) do { \