xref: /titanic_41/usr/src/uts/common/fs/zfs/sys/sa.h (revision 0521c5ebd0c906e1574175b64bd238405444c004)
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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
23  */
24 
25 #ifndef	_SYS_SA_H
26 #define	_SYS_SA_H
27 
28 #include <sys/dmu.h>
29 
30 /*
31  * Currently available byteswap functions.
32  * If it all possible new attributes should used
33  * one of the already defined byteswap functions.
34  * If a new byteswap function is added then the
35  * ZPL/Pool version will need to be bumped.
36  */
37 
38 typedef enum sa_bswap_type {
39 	SA_UINT64_ARRAY,
40 	SA_UINT32_ARRAY,
41 	SA_UINT16_ARRAY,
42 	SA_UINT8_ARRAY,
43 	SA_ACL,
44 } sa_bswap_type_t;
45 
46 typedef uint16_t	sa_attr_type_t;
47 
48 /*
49  * Attribute to register support for.
50  */
51 typedef struct sa_attr_reg {
52 	char 			*sa_name;	/* attribute name */
53 	uint16_t 		sa_length;
54 	sa_bswap_type_t		sa_byteswap;	/* bswap functon enum */
55 	sa_attr_type_t 		sa_attr; /* filled in during registration */
56 } sa_attr_reg_t;
57 
58 
59 typedef void (sa_data_locator_t)(void **, uint32_t *, uint32_t,
60     boolean_t, void *userptr);
61 
62 /*
63  * array of attributes to store.
64  *
65  * This array should be treated as opaque/private data.
66  * The SA_BULK_ADD_ATTR() macro should be used for manipulating
67  * the array.
68  *
69  * When sa_replace_all_by_template() is used the attributes
70  * will be stored in the order defined in the array, except that
71  * the attributes may be split between the bonus and the spill buffer
72  *
73  */
74 typedef struct sa_bulk_attr {
75 	void			*sa_data;
76 	sa_data_locator_t	*sa_data_func;
77 	uint16_t		sa_length;
78 	sa_attr_type_t		sa_attr;
79 	/* the following are private to the sa framework */
80 	void 			*sa_addr;
81 	uint16_t		sa_buftype;
82 	uint16_t		sa_size;
83 } sa_bulk_attr_t;
84 
85 
86 /*
87  * special macro for adding entries for bulk attr support
88  * bulk - sa_bulk_attr_t
89  * count - integer that will be incremented during each add
90  * attr - attribute to manipulate
91  * func - function for accessing data.
92  * data - pointer to data.
93  * len - length of data
94  */
95 
96 #define	SA_ADD_BULK_ATTR(b, idx, attr, func, data, len) \
97 { \
98 	b[idx].sa_attr = attr;\
99 	b[idx].sa_data_func = func; \
100 	b[idx].sa_data = data; \
101 	b[idx++].sa_length = len; \
102 }
103 
104 typedef struct sa_os sa_os_t;
105 
106 typedef enum sa_handle_type {
107 	SA_HDL_SHARED,
108 	SA_HDL_PRIVATE
109 } sa_handle_type_t;
110 
111 struct sa_handle;
112 typedef void *sa_lookup_tab_t;
113 typedef struct sa_handle sa_handle_t;
114 
115 typedef void (sa_update_cb_t)(sa_handle_t *, dmu_tx_t *tx);
116 
117 int sa_handle_get(objset_t *, uint64_t, void *userp,
118     sa_handle_type_t, sa_handle_t **);
119 int sa_handle_get_from_db(objset_t *, dmu_buf_t *, void *userp,
120     sa_handle_type_t, sa_handle_t **);
121 void sa_handle_destroy(sa_handle_t *);
122 int sa_buf_hold(objset_t *, uint64_t, void *, dmu_buf_t **);
123 void sa_buf_rele(dmu_buf_t *, void *);
124 int sa_lookup(sa_handle_t *, sa_attr_type_t, void *buf, uint32_t buflen);
125 int sa_update(sa_handle_t *, sa_attr_type_t, void *buf,
126     uint32_t buflen, dmu_tx_t *);
127 int sa_remove(sa_handle_t *, sa_attr_type_t, dmu_tx_t *);
128 int sa_bulk_lookup(sa_handle_t *, sa_bulk_attr_t *, int count);
129 int sa_bulk_lookup_locked(sa_handle_t *, sa_bulk_attr_t *, int count);
130 int sa_bulk_update(sa_handle_t *, sa_bulk_attr_t *, int count, dmu_tx_t *);
131 int sa_size(sa_handle_t *, sa_attr_type_t, int *);
132 int sa_update_from_cb(sa_handle_t *, sa_attr_type_t,
133     uint32_t buflen, sa_data_locator_t *, void *userdata, dmu_tx_t *);
134 void sa_object_info(sa_handle_t *, dmu_object_info_t *);
135 void sa_object_size(sa_handle_t *, uint32_t *, u_longlong_t *);
136 void *sa_get_userdata(sa_handle_t *);
137 void sa_set_userp(sa_handle_t *, void *);
138 dmu_buf_t *sa_get_db(sa_handle_t *);
139 uint64_t sa_handle_object(sa_handle_t *);
140 boolean_t sa_attr_would_spill(sa_handle_t *, sa_attr_type_t, int size);
141 void sa_register_update_callback(objset_t *, sa_update_cb_t *);
142 int sa_setup(objset_t *, uint64_t, sa_attr_reg_t *, int, sa_attr_type_t **);
143 void sa_tear_down(objset_t *);
144 int sa_replace_all_by_template(sa_handle_t *, sa_bulk_attr_t *,
145     int, dmu_tx_t *);
146 int sa_replace_all_by_template_locked(sa_handle_t *, sa_bulk_attr_t *,
147     int, dmu_tx_t *);
148 boolean_t sa_enabled(objset_t *);
149 void sa_cache_init();
150 void sa_cache_fini();
151 int sa_set_sa_object(objset_t *, uint64_t);
152 int sa_hdrsize(void *);
153 void sa_handle_lock(sa_handle_t *);
154 void sa_handle_unlock(sa_handle_t *);
155 
156 #ifdef _KERNEL
157 int sa_lookup_uio(sa_handle_t *, sa_attr_type_t, uio_t *);
158 #endif
159 
160 #ifdef	__cplusplus
161 extern "C" {
162 #endif
163 
164 
165 #ifdef	__cplusplus
166 }
167 #endif
168 
169 #endif	/* _SYS_SA_H */
170