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1 | /* |
2 | * CDDL HEADER START | |
3 | * | |
4 | * The contents of this file are subject to the terms of the | |
5 | * Common Development and Distribution License (the "License"). | |
6 | * You may not use this file except in compliance with the License. | |
7 | * | |
8 | * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | |
9 | * or http://www.opensolaris.org/os/licensing. | |
10 | * See the License for the specific language governing permissions | |
11 | * and limitations under the License. | |
12 | * | |
13 | * When distributing Covered Code, include this CDDL HEADER in each | |
14 | * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | |
15 | * If applicable, add the following below this CDDL HEADER, with the | |
16 | * fields enclosed by brackets "[]" replaced with your own identifying | |
17 | * information: Portions Copyright [yyyy] [name of copyright owner] | |
18 | * | |
19 | * CDDL HEADER END | |
20 | */ | |
21 | /* | |
22 | * Copyright 2008 Sun Microsystems, Inc. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
26 | #ifndef _SYS_DSL_DATASET_H | |
27 | #define _SYS_DSL_DATASET_H | |
28 | ||
29 | #pragma ident "@(#)dsl_dataset.h 1.16 08/04/27 SMI" | |
30 | ||
31 | #include <sys/dmu.h> | |
32 | #include <sys/spa.h> | |
33 | #include <sys/txg.h> | |
34 | #include <sys/zio.h> | |
35 | #include <sys/bplist.h> | |
36 | #include <sys/dsl_synctask.h> | |
37 | #include <sys/zfs_context.h> | |
38 | ||
39 | #ifdef __cplusplus | |
40 | extern "C" { | |
41 | #endif | |
42 | ||
43 | struct dsl_dataset; | |
44 | struct dsl_dir; | |
45 | struct dsl_pool; | |
46 | ||
47 | typedef void dsl_dataset_evict_func_t(struct dsl_dataset *, void *); | |
48 | ||
49 | #define DS_FLAG_INCONSISTENT (1ULL<<0) | |
50 | /* | |
51 | * NB: nopromote can not yet be set, but we want support for it in this | |
52 | * on-disk version, so that we don't need to upgrade for it later. It | |
53 | * will be needed when we implement 'zfs split' (where the split off | |
54 | * clone should not be promoted). | |
55 | */ | |
56 | #define DS_FLAG_NOPROMOTE (1ULL<<1) | |
57 | ||
58 | /* | |
59 | * DS_FLAG_UNIQUE_ACCURATE is set if ds_unique_bytes has been correctly | |
60 | * calculated for head datasets (starting with SPA_VERSION_UNIQUE_ACCURATE, | |
61 | * refquota/refreservations). | |
62 | */ | |
63 | #define DS_FLAG_UNIQUE_ACCURATE (1ULL<<2) | |
64 | ||
65 | /* | |
66 | * DS_FLAG_CI_DATASET is set if the dataset contains a file system whose | |
67 | * name lookups should be performed case-insensitively. | |
68 | */ | |
69 | #define DS_FLAG_CI_DATASET (1ULL<<16) | |
70 | ||
71 | typedef struct dsl_dataset_phys { | |
72 | uint64_t ds_dir_obj; | |
73 | uint64_t ds_prev_snap_obj; | |
74 | uint64_t ds_prev_snap_txg; | |
75 | uint64_t ds_next_snap_obj; | |
76 | uint64_t ds_snapnames_zapobj; /* zap obj of snaps; ==0 for snaps */ | |
77 | uint64_t ds_num_children; /* clone/snap children; ==0 for head */ | |
78 | uint64_t ds_creation_time; /* seconds since 1970 */ | |
79 | uint64_t ds_creation_txg; | |
80 | uint64_t ds_deadlist_obj; | |
81 | uint64_t ds_used_bytes; | |
82 | uint64_t ds_compressed_bytes; | |
83 | uint64_t ds_uncompressed_bytes; | |
84 | uint64_t ds_unique_bytes; /* only relevant to snapshots */ | |
85 | /* | |
86 | * The ds_fsid_guid is a 56-bit ID that can change to avoid | |
87 | * collisions. The ds_guid is a 64-bit ID that will never | |
88 | * change, so there is a small probability that it will collide. | |
89 | */ | |
90 | uint64_t ds_fsid_guid; | |
91 | uint64_t ds_guid; | |
92 | uint64_t ds_flags; | |
93 | blkptr_t ds_bp; | |
94 | uint64_t ds_pad[8]; /* pad out to 320 bytes for good measure */ | |
95 | } dsl_dataset_phys_t; | |
96 | ||
97 | typedef struct dsl_dataset { | |
98 | /* Immutable: */ | |
99 | struct dsl_dir *ds_dir; | |
100 | dsl_dataset_phys_t *ds_phys; | |
101 | dmu_buf_t *ds_dbuf; | |
102 | uint64_t ds_object; | |
103 | uint64_t ds_fsid_guid; | |
104 | ||
105 | /* only used in syncing context: */ | |
106 | struct dsl_dataset *ds_prev; /* only valid for non-snapshots */ | |
107 | ||
108 | /* has internal locking: */ | |
109 | bplist_t ds_deadlist; | |
110 | ||
111 | /* protected by lock on pool's dp_dirty_datasets list */ | |
112 | txg_node_t ds_dirty_link; | |
113 | list_node_t ds_synced_link; | |
114 | ||
115 | /* | |
116 | * ds_phys->ds_<accounting> is also protected by ds_lock. | |
117 | * Protected by ds_lock: | |
118 | */ | |
119 | kmutex_t ds_lock; | |
120 | void *ds_user_ptr; | |
121 | dsl_dataset_evict_func_t *ds_user_evict_func; | |
122 | uint64_t ds_open_refcount; | |
123 | ||
124 | /* no locking; only for making guesses */ | |
125 | uint64_t ds_trysnap_txg; | |
126 | ||
127 | /* for objset_open() */ | |
128 | kmutex_t ds_opening_lock; | |
129 | ||
130 | uint64_t ds_reserved; /* cached refreservation */ | |
131 | uint64_t ds_quota; /* cached refquota */ | |
132 | ||
133 | /* Protected by ds_lock; keep at end of struct for better locality */ | |
134 | char ds_snapname[MAXNAMELEN]; | |
135 | } dsl_dataset_t; | |
136 | ||
137 | #define dsl_dataset_is_snapshot(ds) \ | |
138 | ((ds)->ds_phys->ds_num_children != 0) | |
139 | ||
140 | #define DS_UNIQUE_IS_ACCURATE(ds) \ | |
141 | (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0) | |
142 | ||
143 | int dsl_dataset_open_spa(spa_t *spa, const char *name, int mode, | |
144 | void *tag, dsl_dataset_t **dsp); | |
145 | int dsl_dataset_open(const char *name, int mode, void *tag, | |
146 | dsl_dataset_t **dsp); | |
147 | int dsl_dataset_open_obj(struct dsl_pool *dp, uint64_t dsobj, | |
148 | const char *tail, int mode, void *tag, dsl_dataset_t **); | |
149 | void dsl_dataset_name(dsl_dataset_t *ds, char *name); | |
150 | void dsl_dataset_close(dsl_dataset_t *ds, int mode, void *tag); | |
151 | void dsl_dataset_downgrade(dsl_dataset_t *ds, int oldmode, int newmode); | |
152 | boolean_t dsl_dataset_tryupgrade(dsl_dataset_t *ds, int oldmode, int newmode); | |
153 | uint64_t dsl_dataset_create_sync_impl(dsl_dir_t *dd, dsl_dataset_t *origin, | |
154 | uint64_t flags, dmu_tx_t *tx); | |
155 | uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, | |
156 | const char *lastname, dsl_dataset_t *origin, uint64_t flags, | |
157 | cred_t *, dmu_tx_t *); | |
158 | int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag); | |
159 | int dsl_snapshots_destroy(char *fsname, char *snapname); | |
160 | dsl_checkfunc_t dsl_dataset_destroy_check; | |
161 | dsl_syncfunc_t dsl_dataset_destroy_sync; | |
162 | dsl_checkfunc_t dsl_dataset_snapshot_check; | |
163 | dsl_syncfunc_t dsl_dataset_snapshot_sync; | |
164 | int dsl_dataset_rollback(dsl_dataset_t *ds, dmu_objset_type_t ost); | |
165 | int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive); | |
166 | int dsl_dataset_promote(const char *name); | |
167 | int dsl_dataset_clone_swap(dsl_dataset_t *clone, dsl_dataset_t *origin_head, | |
168 | boolean_t force); | |
169 | ||
170 | void *dsl_dataset_set_user_ptr(dsl_dataset_t *ds, | |
171 | void *p, dsl_dataset_evict_func_t func); | |
172 | void *dsl_dataset_get_user_ptr(dsl_dataset_t *ds); | |
173 | ||
174 | blkptr_t *dsl_dataset_get_blkptr(dsl_dataset_t *ds); | |
175 | void dsl_dataset_set_blkptr(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx); | |
176 | ||
177 | spa_t *dsl_dataset_get_spa(dsl_dataset_t *ds); | |
178 | ||
179 | boolean_t dsl_dataset_modified_since_lastsnap(dsl_dataset_t *ds); | |
180 | ||
181 | void dsl_dataset_sync(dsl_dataset_t *os, zio_t *zio, dmu_tx_t *tx); | |
182 | ||
183 | void dsl_dataset_block_born(dsl_dataset_t *ds, blkptr_t *bp, dmu_tx_t *tx); | |
184 | void dsl_dataset_block_kill(dsl_dataset_t *ds, blkptr_t *bp, zio_t *pio, | |
185 | dmu_tx_t *tx); | |
186 | int dsl_dataset_block_freeable(dsl_dataset_t *ds, uint64_t blk_birth); | |
187 | uint64_t dsl_dataset_prev_snap_txg(dsl_dataset_t *ds); | |
188 | ||
189 | void dsl_dataset_dirty(dsl_dataset_t *ds, dmu_tx_t *tx); | |
190 | void dsl_dataset_stats(dsl_dataset_t *os, nvlist_t *nv); | |
191 | void dsl_dataset_fast_stat(dsl_dataset_t *ds, dmu_objset_stats_t *stat); | |
192 | void dsl_dataset_space(dsl_dataset_t *ds, | |
193 | uint64_t *refdbytesp, uint64_t *availbytesp, | |
194 | uint64_t *usedobjsp, uint64_t *availobjsp); | |
195 | uint64_t dsl_dataset_fsid_guid(dsl_dataset_t *ds); | |
196 | ||
197 | void dsl_dataset_create_root(struct dsl_pool *dp, uint64_t *ddobjp, | |
198 | dmu_tx_t *tx); | |
199 | ||
200 | int dsl_dsobj_to_dsname(char *pname, uint64_t obj, char *buf); | |
201 | ||
202 | int dsl_dataset_check_quota(dsl_dataset_t *ds, boolean_t check_quota, | |
203 | uint64_t asize, uint64_t inflight, uint64_t *used, | |
204 | uint64_t *ref_rsrv); | |
205 | int dsl_dataset_set_quota(const char *dsname, uint64_t quota); | |
206 | void dsl_dataset_set_quota_sync(void *arg1, void *arg2, cred_t *cr, | |
207 | dmu_tx_t *tx); | |
208 | int dsl_dataset_set_reservation(const char *dsname, uint64_t reservation); | |
209 | void dsl_dataset_set_flags(dsl_dataset_t *ds, uint64_t flags); | |
210 | ||
211 | #ifdef ZFS_DEBUG | |
212 | #define dprintf_ds(ds, fmt, ...) do { \ | |
213 | if (zfs_flags & ZFS_DEBUG_DPRINTF) { \ | |
214 | char *__ds_name = kmem_alloc(MAXNAMELEN, KM_SLEEP); \ | |
215 | dsl_dataset_name(ds, __ds_name); \ | |
216 | dprintf("ds=%s " fmt, __ds_name, __VA_ARGS__); \ | |
217 | kmem_free(__ds_name, MAXNAMELEN); \ | |
218 | } \ | |
219 | _NOTE(CONSTCOND) } while (0) | |
220 | #else | |
221 | #define dprintf_ds(dd, fmt, ...) | |
222 | #endif | |
223 | ||
224 | #ifdef __cplusplus | |
225 | } | |
226 | #endif | |
227 | ||
228 | #endif /* _SYS_DSL_DATASET_H */ |