xref: /titanic_41/usr/src/uts/common/fs/zfs/sys/zfs_sa.h (revision 0a586cea3ceec7e5e50e7e54c745082a7a333ac2)
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_END
77 } zpl_attr_t;
78 
79 #define	ZFS_OLD_ZNODE_PHYS_SIZE	0x108
80 #define	ZFS_SA_BASE_ATTR_SIZE	(ZFS_OLD_ZNODE_PHYS_SIZE - \
81     sizeof (zfs_acl_phys_t))
82 
83 #define	SA_MODE_OFFSET		0
84 #define	SA_SIZE_OFFSET		8
85 #define	SA_GEN_OFFSET		16
86 #define	SA_UID_OFFSET		24
87 #define	SA_GID_OFFSET		32
88 #define	SA_PARENT_OFFSET	40
89 
90 extern sa_attr_reg_t zfs_attr_table[ZPL_END + 1];
91 extern sa_attr_reg_t zfs_legacy_attr_table[ZPL_END + 1];
92 
93 /*
94  * This is a deprecated data structure that only exists for
95  * dealing with file systems create prior to ZPL version 5.
96  */
97 typedef struct znode_phys {
98 	uint64_t zp_atime[2];		/*  0 - last file access time */
99 	uint64_t zp_mtime[2];		/* 16 - last file modification time */
100 	uint64_t zp_ctime[2];		/* 32 - last file change time */
101 	uint64_t zp_crtime[2];		/* 48 - creation time */
102 	uint64_t zp_gen;		/* 64 - generation (txg of creation) */
103 	uint64_t zp_mode;		/* 72 - file mode bits */
104 	uint64_t zp_size;		/* 80 - size of file */
105 	uint64_t zp_parent;		/* 88 - directory parent (`..') */
106 	uint64_t zp_links;		/* 96 - number of links to file */
107 	uint64_t zp_xattr;		/* 104 - DMU object for xattrs */
108 	uint64_t zp_rdev;		/* 112 - dev_t for VBLK & VCHR files */
109 	uint64_t zp_flags;		/* 120 - persistent flags */
110 	uint64_t zp_uid;		/* 128 - file owner */
111 	uint64_t zp_gid;		/* 136 - owning group */
112 	uint64_t zp_zap;		/* 144 - extra attributes */
113 	uint64_t zp_pad[3];		/* 152 - future */
114 	zfs_acl_phys_t zp_acl;		/* 176 - 263 ACL */
115 	/*
116 	 * Data may pad out any remaining bytes in the znode buffer, eg:
117 	 *
118 	 * |<---------------------- dnode_phys (512) ------------------------>|
119 	 * |<-- dnode (192) --->|<----------- "bonus" buffer (320) ---------->|
120 	 *			|<---- znode (264) ---->|<---- data (56) ---->|
121 	 *
122 	 * At present, we use this space for the following:
123 	 *  - symbolic links
124 	 *  - 32-byte anti-virus scanstamp (regular files only)
125 	 */
126 } znode_phys_t;
127 
128 #ifdef _KERNEL
129 int zfs_sa_readlink(struct znode *, uio_t *);
130 void zfs_sa_symlink(struct znode *, char *link, int len, dmu_tx_t *);
131 void zfs_sa_upgrade(struct sa_handle  *, dmu_tx_t *);
132 void zfs_sa_get_scanstamp(struct znode *, xvattr_t *);
133 void zfs_sa_set_scanstamp(struct znode *, xvattr_t *, dmu_tx_t *);
134 void zfs_sa_uprade_pre(struct sa_handle *, void *, dmu_tx_t *);
135 void zfs_sa_upgrade_post(struct sa_handle *, void *, dmu_tx_t *);
136 void zfs_sa_upgrade_txholds(dmu_tx_t *, struct znode *);
137 #endif
138 
139 #ifdef	__cplusplus
140 }
141 #endif
142 
143 #endif	/* _SYS_ZFS_SA_H */
144