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OS-1566 filesystem limits for ZFS datasets
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--- old/usr/src/uts/common/fs/zfs/sys/dsl_dir.h
+++ new/usr/src/uts/common/fs/zfs/sys/dsl_dir.h
1 1 /*
2 2 * CDDL HEADER START
3 3 *
4 4 * The contents of this file are subject to the terms of the
5 5 * Common Development and Distribution License (the "License").
6 6 * You may not use this file except in compliance with the License.
7 7 *
8 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 9 * or http://www.opensolaris.org/os/licensing.
10 10 * See the License for the specific language governing permissions
11 11 * and limitations under the License.
12 12 *
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13 13 * When distributing Covered Code, include this CDDL HEADER in each
14 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 15 * If applicable, add the following below this CDDL HEADER, with the
16 16 * fields enclosed by brackets "[]" replaced with your own identifying
17 17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 18 *
19 19 * CDDL HEADER END
20 20 */
21 21 /*
22 22 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 + * Copyright (c) 2012, Joyent, Inc. All rights reserved.
23 24 */
24 25
25 26 #ifndef _SYS_DSL_DIR_H
26 27 #define _SYS_DSL_DIR_H
27 28
28 29 #include <sys/dmu.h>
29 30 #include <sys/dsl_pool.h>
30 31 #include <sys/dsl_synctask.h>
31 32 #include <sys/refcount.h>
32 33 #include <sys/zfs_context.h>
33 34
34 35 #ifdef __cplusplus
35 36 extern "C" {
36 37 #endif
37 38
38 39 struct dsl_dataset;
39 40
40 41 typedef enum dd_used {
41 42 DD_USED_HEAD,
42 43 DD_USED_SNAP,
43 44 DD_USED_CHILD,
44 45 DD_USED_CHILD_RSRV,
45 46 DD_USED_REFRSRV,
46 47 DD_USED_NUM
47 48 } dd_used_t;
48 49
49 50 #define DD_FLAG_USED_BREAKDOWN (1<<0)
50 51
51 52 typedef struct dsl_dir_phys {
52 53 uint64_t dd_creation_time; /* not actually used */
53 54 uint64_t dd_head_dataset_obj;
54 55 uint64_t dd_parent_obj;
55 56 uint64_t dd_origin_obj;
56 57 uint64_t dd_child_dir_zapobj;
57 58 /*
58 59 * how much space our children are accounting for; for leaf
59 60 * datasets, == physical space used by fs + snaps
60 61 */
61 62 uint64_t dd_used_bytes;
62 63 uint64_t dd_compressed_bytes;
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63 64 uint64_t dd_uncompressed_bytes;
64 65 /* Administrative quota setting */
65 66 uint64_t dd_quota;
66 67 /* Administrative reservation setting */
67 68 uint64_t dd_reserved;
68 69 uint64_t dd_props_zapobj;
69 70 uint64_t dd_deleg_zapobj; /* dataset delegation permissions */
70 71 uint64_t dd_flags;
71 72 uint64_t dd_used_breakdown[DD_USED_NUM];
72 73 uint64_t dd_clones; /* dsl_dir objects */
73 - uint64_t dd_pad[13]; /* pad out to 256 bytes for good measure */
74 +
75 + uint64_t dd_filesystem_count;
76 + uint64_t dd_snapshot_count;
77 +
78 + uint64_t dd_pad[11]; /* pad out to 256 bytes for good measure */
74 79 } dsl_dir_phys_t;
75 80
76 81 struct dsl_dir {
77 82 /* These are immutable; no lock needed: */
78 83 uint64_t dd_object;
79 84 dsl_dir_phys_t *dd_phys;
80 85 dmu_buf_t *dd_dbuf;
81 86 dsl_pool_t *dd_pool;
82 87
83 88 /* protected by lock on pool's dp_dirty_dirs list */
84 89 txg_node_t dd_dirty_link;
85 90
86 91 /* protected by dp_config_rwlock */
87 92 dsl_dir_t *dd_parent;
88 93
89 94 /* Protected by dd_lock */
90 95 kmutex_t dd_lock;
91 96 list_t dd_prop_cbs; /* list of dsl_prop_cb_record_t's */
92 97 timestruc_t dd_snap_cmtime; /* last time snapshot namespace changed */
93 98 uint64_t dd_origin_txg;
94 99
95 100 /* gross estimate of space used by in-flight tx's */
96 101 uint64_t dd_tempreserved[TXG_SIZE];
97 102 /* amount of space we expect to write; == amount of dirty data */
98 103 int64_t dd_space_towrite[TXG_SIZE];
99 104
100 105 /* protected by dd_lock; keep at end of struct for better locality */
101 106 char dd_myname[MAXNAMELEN];
102 107 };
103 108
104 109 void dsl_dir_close(dsl_dir_t *dd, void *tag);
105 110 int dsl_dir_open(const char *name, void *tag, dsl_dir_t **, const char **tail);
106 111 int dsl_dir_open_spa(spa_t *spa, const char *name, void *tag, dsl_dir_t **,
107 112 const char **tailp);
108 113 int dsl_dir_open_obj(dsl_pool_t *dp, uint64_t ddobj,
109 114 const char *tail, void *tag, dsl_dir_t **);
110 115 void dsl_dir_name(dsl_dir_t *dd, char *buf);
111 116 int dsl_dir_namelen(dsl_dir_t *dd);
112 117 uint64_t dsl_dir_create_sync(dsl_pool_t *dp, dsl_dir_t *pds,
113 118 const char *name, dmu_tx_t *tx);
114 119 dsl_checkfunc_t dsl_dir_destroy_check;
115 120 dsl_syncfunc_t dsl_dir_destroy_sync;
116 121 void dsl_dir_stats(dsl_dir_t *dd, nvlist_t *nv);
117 122 uint64_t dsl_dir_space_available(dsl_dir_t *dd,
118 123 dsl_dir_t *ancestor, int64_t delta, int ondiskonly);
119 124 void dsl_dir_dirty(dsl_dir_t *dd, dmu_tx_t *tx);
120 125 void dsl_dir_sync(dsl_dir_t *dd, dmu_tx_t *tx);
121 126 int dsl_dir_tempreserve_space(dsl_dir_t *dd, uint64_t mem,
122 127 uint64_t asize, uint64_t fsize, uint64_t usize, void **tr_cookiep,
123 128 dmu_tx_t *tx);
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124 129 void dsl_dir_tempreserve_clear(void *tr_cookie, dmu_tx_t *tx);
125 130 void dsl_dir_willuse_space(dsl_dir_t *dd, int64_t space, dmu_tx_t *tx);
126 131 void dsl_dir_diduse_space(dsl_dir_t *dd, dd_used_t type,
127 132 int64_t used, int64_t compressed, int64_t uncompressed, dmu_tx_t *tx);
128 133 void dsl_dir_transfer_space(dsl_dir_t *dd, int64_t delta,
129 134 dd_used_t oldtype, dd_used_t newtype, dmu_tx_t *tx);
130 135 int dsl_dir_set_quota(const char *ddname, zprop_source_t source,
131 136 uint64_t quota);
132 137 int dsl_dir_set_reservation(const char *ddname, zprop_source_t source,
133 138 uint64_t reservation);
139 +int dsl_dir_validate_fs_ss_limit(const char *, uint64_t, zfs_prop_t);
140 +int dsl_dir_fscount_check(dsl_dir_t *, uint64_t, dsl_dir_t *);
141 +void dsl_dir_fscount_adjust(dsl_dir_t *, dmu_tx_t *, int64_t, boolean_t,
142 + boolean_t);
143 +int dsl_snapcount_check(dsl_dir_t *, uint64_t, dsl_dir_t *);
144 +void dsl_snapcount_adjust(dsl_dir_t *, dmu_tx_t *, int64_t, boolean_t);
134 145 int dsl_dir_rename(dsl_dir_t *dd, const char *newname);
135 -int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd, uint64_t space);
146 +int dsl_dir_transfer_possible(dsl_dir_t *sdd, dsl_dir_t *tdd,
147 + dsl_dir_t *moving_dd, uint64_t space, dmu_tx_t *tx);
136 148 int dsl_dir_set_reservation_check(void *arg1, void *arg2, dmu_tx_t *tx);
137 149 boolean_t dsl_dir_is_clone(dsl_dir_t *dd);
138 150 void dsl_dir_new_refreservation(dsl_dir_t *dd, struct dsl_dataset *ds,
139 151 uint64_t reservation, cred_t *cr, dmu_tx_t *tx);
140 152 void dsl_dir_snap_cmtime_update(dsl_dir_t *dd);
141 153 timestruc_t dsl_dir_snap_cmtime(dsl_dir_t *dd);
142 154
143 155 /* internal reserved dir name */
144 156 #define MOS_DIR_NAME "$MOS"
145 157 #define ORIGIN_DIR_NAME "$ORIGIN"
146 158 #define XLATION_DIR_NAME "$XLATION"
147 159 #define FREE_DIR_NAME "$FREE"
148 160
149 161 #ifdef ZFS_DEBUG
150 162 #define dprintf_dd(dd, fmt, ...) do { \
151 163 if (zfs_flags & ZFS_DEBUG_DPRINTF) { \
152 164 char *__ds_name = kmem_alloc(MAXNAMELEN + strlen(MOS_DIR_NAME) + 1, \
153 165 KM_SLEEP); \
154 166 dsl_dir_name(dd, __ds_name); \
155 167 dprintf("dd=%s " fmt, __ds_name, __VA_ARGS__); \
156 168 kmem_free(__ds_name, MAXNAMELEN + strlen(MOS_DIR_NAME) + 1); \
157 169 } \
158 170 _NOTE(CONSTCOND) } while (0)
159 171 #else
160 172 #define dprintf_dd(dd, fmt, ...)
161 173 #endif
162 174
163 175 #ifdef __cplusplus
164 176 }
165 177 #endif
166 178
167 179 #endif /* _SYS_DSL_DIR_H */
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