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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 2010 Sun Microsystems, Inc. All rights reserved. | |
23 | * Use is subject to license terms. | |
24 | */ | |
25 | ||
26 | #ifndef _SYS_ZFS_SA_H | |
27 | #define _SYS_ZFS_SA_H | |
28 | ||
29 | #ifdef _KERNEL | |
30 | #include <sys/types32.h> | |
31 | #include <sys/list.h> | |
32 | #include <sys/dmu.h> | |
33 | #include <sys/zfs_acl.h> | |
34 | #include <sys/zfs_znode.h> | |
35 | #include <sys/sa.h> | |
36 | #include <sys/zil.h> | |
37 | ||
38 | ||
39 | #endif | |
40 | ||
41 | #ifdef __cplusplus | |
42 | extern "C" { | |
43 | #endif | |
44 | ||
45 | /* | |
46 | * This is the list of known attributes | |
47 | * to the ZPL. The values of the actual | |
48 | * attributes are not defined by the order | |
49 | * the enums. It is controlled by the attribute | |
50 | * registration mechanism. Two different file system | |
51 | * could have different numeric values for the same | |
52 | * attributes. this list is only used for dereferencing | |
53 | * into the table that will hold the actual numeric value. | |
54 | */ | |
55 | typedef enum zpl_attr { | |
56 | ZPL_ATIME, | |
57 | ZPL_MTIME, | |
58 | ZPL_CTIME, | |
59 | ZPL_CRTIME, | |
60 | ZPL_GEN, | |
61 | ZPL_MODE, | |
62 | ZPL_SIZE, | |
63 | ZPL_PARENT, | |
64 | ZPL_LINKS, | |
65 | ZPL_XATTR, | |
66 | ZPL_RDEV, | |
67 | ZPL_FLAGS, | |
68 | ZPL_UID, | |
69 | ZPL_GID, | |
70 | ZPL_PAD, | |
71 | ZPL_ZNODE_ACL, | |
72 | ZPL_DACL_COUNT, | |
73 | ZPL_SYMLINK, | |
74 | ZPL_SCANSTAMP, | |
75 | ZPL_DACL_ACES, | |
76 | ZPL_DXATTR, | |
77 | ZPL_END | |
78 | } zpl_attr_t; | |
79 | ||
80 | #define ZFS_OLD_ZNODE_PHYS_SIZE 0x108 | |
81 | #define ZFS_SA_BASE_ATTR_SIZE (ZFS_OLD_ZNODE_PHYS_SIZE - \ | |
82 | sizeof (zfs_acl_phys_t)) | |
83 | ||
84 | #define SA_MODE_OFFSET 0 | |
85 | #define SA_SIZE_OFFSET 8 | |
86 | #define SA_GEN_OFFSET 16 | |
87 | #define SA_UID_OFFSET 24 | |
88 | #define SA_GID_OFFSET 32 | |
89 | #define SA_PARENT_OFFSET 40 | |
90 | ||
91 | extern sa_attr_reg_t zfs_attr_table[ZPL_END + 1]; | |
92 | extern sa_attr_reg_t zfs_legacy_attr_table[ZPL_END + 1]; | |
93 | ||
94 | /* | |
95 | * This is a deprecated data structure that only exists for | |
96 | * dealing with file systems create prior to ZPL version 5. | |
97 | */ | |
98 | typedef struct znode_phys { | |
99 | uint64_t zp_atime[2]; /* 0 - last file access time */ | |
100 | uint64_t zp_mtime[2]; /* 16 - last file modification time */ | |
101 | uint64_t zp_ctime[2]; /* 32 - last file change time */ | |
102 | uint64_t zp_crtime[2]; /* 48 - creation time */ | |
103 | uint64_t zp_gen; /* 64 - generation (txg of creation) */ | |
104 | uint64_t zp_mode; /* 72 - file mode bits */ | |
105 | uint64_t zp_size; /* 80 - size of file */ | |
106 | uint64_t zp_parent; /* 88 - directory parent (`..') */ | |
107 | uint64_t zp_links; /* 96 - number of links to file */ | |
108 | uint64_t zp_xattr; /* 104 - DMU object for xattrs */ | |
109 | uint64_t zp_rdev; /* 112 - dev_t for VBLK & VCHR files */ | |
110 | uint64_t zp_flags; /* 120 - persistent flags */ | |
111 | uint64_t zp_uid; /* 128 - file owner */ | |
112 | uint64_t zp_gid; /* 136 - owning group */ | |
113 | uint64_t zp_zap; /* 144 - extra attributes */ | |
114 | uint64_t zp_pad[3]; /* 152 - future */ | |
115 | zfs_acl_phys_t zp_acl; /* 176 - 263 ACL */ | |
116 | /* | |
117 | * Data may pad out any remaining bytes in the znode buffer, eg: | |
118 | * | |
119 | * |<---------------------- dnode_phys (512) ------------------------>| | |
120 | * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->| | |
121 | * |<---- znode (264) ---->|<---- data (56) ---->| | |
122 | * | |
123 | * At present, we use this space for the following: | |
124 | * - symbolic links | |
125 | * - 32-byte anti-virus scanstamp (regular files only) | |
126 | */ | |
127 | } znode_phys_t; | |
128 | ||
129 | #ifdef _KERNEL | |
130 | ||
131 | #define DXATTR_MAX_ENTRY_SIZE (32768) | |
132 | #define DXATTR_MAX_SA_SIZE (SPA_OLD_MAXBLOCKSIZE >> 1) | |
133 | ||
134 | int zfs_sa_readlink(struct znode *, uio_t *); | |
135 | void zfs_sa_symlink(struct znode *, char *link, int len, dmu_tx_t *); | |
136 | void zfs_sa_get_scanstamp(struct znode *, xvattr_t *); | |
137 | void zfs_sa_set_scanstamp(struct znode *, xvattr_t *, dmu_tx_t *); | |
138 | int zfs_sa_get_xattr(struct znode *); | |
139 | int zfs_sa_set_xattr(struct znode *); | |
140 | void zfs_sa_upgrade(struct sa_handle *, dmu_tx_t *); | |
141 | void zfs_sa_upgrade_txholds(dmu_tx_t *, struct znode *); | |
142 | void zfs_sa_init(void); | |
143 | void zfs_sa_fini(void); | |
144 | #endif | |
145 | ||
146 | #ifdef __cplusplus | |
147 | } | |
148 | #endif | |
149 | ||
150 | #endif /* _SYS_ZFS_SA_H */ |