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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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | |
23 | */ | |
24 | ||
25 | #ifndef _SYS_FS_ZFS_VFSOPS_H | |
26 | #define _SYS_FS_ZFS_VFSOPS_H | |
27 | ||
28 | #include <sys/isa_defs.h> | |
29 | #include <sys/types32.h> | |
30 | #include <sys/list.h> | |
31 | #include <sys/vfs.h> | |
32 | #include <sys/zil.h> | |
33 | #include <sys/sa.h> | |
34 | #include <sys/rrwlock.h> | |
35 | #include <sys/zfs_ioctl.h> | |
36 | ||
37 | #ifdef __cplusplus | |
38 | extern "C" { | |
39 | #endif | |
40 | ||
41 | struct zfs_sb; | |
42 | struct znode; | |
43 | ||
44 | typedef struct zfs_mntopts { | |
45 | char *z_osname; /* Objset name */ | |
46 | char *z_mntpoint; /* Primary mount point */ | |
47 | uint64_t z_xattr; | |
48 | boolean_t z_readonly; | |
49 | boolean_t z_do_readonly; | |
50 | boolean_t z_setuid; | |
51 | boolean_t z_do_setuid; | |
52 | boolean_t z_exec; | |
53 | boolean_t z_do_exec; | |
54 | boolean_t z_devices; | |
55 | boolean_t z_do_devices; | |
56 | boolean_t z_do_xattr; | |
57 | boolean_t z_atime; | |
58 | boolean_t z_do_atime; | |
59 | boolean_t z_relatime; | |
60 | boolean_t z_do_relatime; | |
61 | boolean_t z_nbmand; | |
62 | boolean_t z_do_nbmand; | |
63 | } zfs_mntopts_t; | |
64 | ||
65 | typedef struct zfs_sb { | |
66 | struct super_block *z_sb; /* generic super_block */ | |
87d546d8 TG |
67 | struct zfs_sb *z_parent; /* parent fs */ |
68 | objset_t *z_os; /* objset reference */ | |
69 | zfs_mntopts_t *z_mntopts; /* passed mount options */ | |
70 | uint64_t z_flags; /* super_block flags */ | |
71 | uint64_t z_root; /* id of root znode */ | |
72 | uint64_t z_unlinkedobj; /* id of unlinked zapobj */ | |
73 | uint64_t z_max_blksz; /* maximum block size for files */ | |
74 | uint64_t z_fuid_obj; /* fuid table object number */ | |
75 | uint64_t z_fuid_size; /* fuid table size */ | |
76 | avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ | |
77 | avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ | |
78 | krwlock_t z_fuid_lock; /* fuid lock */ | |
79 | boolean_t z_fuid_loaded; /* fuid tables are loaded */ | |
80 | boolean_t z_fuid_dirty; /* need to sync fuid table ? */ | |
81 | struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ | |
82 | zilog_t *z_log; /* intent log pointer */ | |
83 | uint_t z_acl_inherit; /* acl inheritance behavior */ | |
84 | uint_t z_acl_type; /* type of ACL usable on this FS */ | |
85 | zfs_case_t z_case; /* case-sense */ | |
86 | boolean_t z_utf8; /* utf8-only */ | |
87 | int z_norm; /* normalization flags */ | |
88 | boolean_t z_atime; /* enable atimes mount option */ | |
89 | boolean_t z_relatime; /* enable relatime mount option */ | |
90 | boolean_t z_unmounted; /* unmounted */ | |
91 | rrmlock_t z_teardown_lock; | |
92 | krwlock_t z_teardown_inactive_lock; | |
93 | list_t z_all_znodes; /* all znodes in the fs */ | |
94 | uint64_t z_nr_znodes; /* number of znodes in the fs */ | |
95 | unsigned long z_rollback_time; /* last online rollback time */ | |
96 | unsigned long z_snap_defer_time; /* last snapshot unmount deferal */ | |
97 | kmutex_t z_znodes_lock; /* lock for z_all_znodes */ | |
98 | arc_prune_t *z_arc_prune; /* called by ARC to prune caches */ | |
99 | struct inode *z_ctldir; /* .zfs directory inode */ | |
100 | boolean_t z_show_ctldir; /* expose .zfs in the root dir */ | |
101 | boolean_t z_issnap; /* true if this is a snapshot */ | |
102 | boolean_t z_vscan; /* virus scan on/off */ | |
103 | boolean_t z_use_fuids; /* version allows fuids */ | |
104 | boolean_t z_replay; /* set during ZIL replay */ | |
105 | boolean_t z_use_sa; /* version allow system attributes */ | |
106 | boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */ | |
107 | uint64_t z_version; /* ZPL version */ | |
108 | uint64_t z_shares_dir; /* hidden shares dir */ | |
109 | kmutex_t z_lock; | |
110 | uint64_t z_userquota_obj; | |
111 | uint64_t z_groupquota_obj; | |
112 | uint64_t z_replay_eof; /* New end of file - replay only */ | |
113 | sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ | |
114 | uint64_t z_hold_size; /* znode hold array size */ | |
115 | avl_tree_t *z_hold_trees; /* znode hold trees */ | |
116 | kmutex_t *z_hold_locks; /* znode hold locks */ | |
117 | } zfs_sb_t; | |
118 | ||
119 | #define ZFS_SUPER_MAGIC 0x2fc12fc1 | |
120 | ||
121 | #define ZSB_XATTR 0x0001 /* Enable user xattrs */ | |
122 | ||
123 | /* | |
124 | * Allow a maximum number of links. While ZFS does not internally limit | |
125 | * this the inode->i_nlink member is defined as an unsigned int. To be | |
126 | * safe we use 2^31-1 as the limit. | |
127 | */ | |
128 | #define ZFS_LINK_MAX ((1U << 31) - 1U) | |
129 | ||
130 | /* | |
131 | * Normal filesystems (those not under .zfs/snapshot) have a total | |
132 | * file ID size limited to 12 bytes (including the length field) due to | |
133 | * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical | |
134 | * reasons, this same limit is being imposed by the Solaris NFSv3 implementation | |
135 | * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It | |
136 | * is not possible to expand beyond 12 bytes without abandoning support | |
137 | * of NFSv2. | |
138 | * | |
139 | * For normal filesystems, we partition up the available space as follows: | |
140 | * 2 bytes fid length (required) | |
141 | * 6 bytes object number (48 bits) | |
142 | * 4 bytes generation number (32 bits) | |
143 | * | |
144 | * We reserve only 48 bits for the object number, as this is the limit | |
145 | * currently defined and imposed by the DMU. | |
146 | */ | |
147 | typedef struct zfid_short { | |
148 | uint16_t zf_len; | |
149 | uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ | |
150 | uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ | |
151 | } zfid_short_t; | |
152 | ||
153 | /* | |
154 | * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes | |
155 | * (including the length field). This makes files under .zfs/snapshot | |
156 | * accessible by NFSv3 and NFSv4, but not NFSv2. | |
157 | * | |
158 | * For files under .zfs/snapshot, we partition up the available space | |
159 | * as follows: | |
160 | * 2 bytes fid length (required) | |
161 | * 6 bytes object number (48 bits) | |
162 | * 4 bytes generation number (32 bits) | |
163 | * 6 bytes objset id (48 bits) | |
164 | * 4 bytes currently just zero (32 bits) | |
165 | * | |
166 | * We reserve only 48 bits for the object number and objset id, as these are | |
167 | * the limits currently defined and imposed by the DMU. | |
168 | */ | |
169 | typedef struct zfid_long { | |
170 | zfid_short_t z_fid; | |
171 | uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ | |
172 | uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */ | |
173 | } zfid_long_t; | |
174 | ||
175 | #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) | |
176 | #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) | |
177 | ||
178 | extern uint_t zfs_fsyncer_key; | |
179 | ||
180 | extern int zfs_suspend_fs(zfs_sb_t *zsb); | |
181 | extern int zfs_resume_fs(zfs_sb_t *zsb, const char *osname); | |
182 | extern int zfs_userspace_one(zfs_sb_t *zsb, zfs_userquota_prop_t type, | |
183 | const char *domain, uint64_t rid, uint64_t *valuep); | |
184 | extern int zfs_userspace_many(zfs_sb_t *zsb, zfs_userquota_prop_t type, | |
185 | uint64_t *cookiep, void *vbuf, uint64_t *bufsizep); | |
186 | extern int zfs_set_userquota(zfs_sb_t *zsb, zfs_userquota_prop_t type, | |
187 | const char *domain, uint64_t rid, uint64_t quota); | |
188 | extern boolean_t zfs_owner_overquota(zfs_sb_t *zsb, struct znode *, | |
189 | boolean_t isgroup); | |
190 | extern boolean_t zfs_fuid_overquota(zfs_sb_t *zsb, boolean_t isgroup, | |
191 | uint64_t fuid); | |
192 | extern int zfs_set_version(zfs_sb_t *zsb, uint64_t newvers); | |
193 | extern int zfs_get_zplprop(objset_t *os, zfs_prop_t prop, | |
194 | uint64_t *value); | |
195 | extern zfs_mntopts_t *zfs_mntopts_alloc(void); | |
196 | extern void zfs_mntopts_free(zfs_mntopts_t *zmo); | |
197 | extern int zfs_sb_create(const char *name, zfs_mntopts_t *zmo, | |
198 | zfs_sb_t **zsbp); | |
199 | extern int zfs_sb_setup(zfs_sb_t *zsb, boolean_t mounting); | |
200 | extern void zfs_sb_free(zfs_sb_t *zsb); | |
201 | extern int zfs_sb_prune(struct super_block *sb, unsigned long nr_to_scan, | |
202 | int *objects); | |
203 | extern int zfs_sb_teardown(zfs_sb_t *zsb, boolean_t unmounting); | |
204 | extern int zfs_check_global_label(const char *dsname, const char *hexsl); | |
205 | extern boolean_t zfs_is_readonly(zfs_sb_t *zsb); | |
206 | ||
207 | extern int zfs_register_callbacks(zfs_sb_t *zsb); | |
208 | extern void zfs_unregister_callbacks(zfs_sb_t *zsb); | |
209 | extern int zfs_domount(struct super_block *sb, zfs_mntopts_t *zmo, int silent); | |
210 | extern void zfs_preumount(struct super_block *sb); | |
211 | extern int zfs_umount(struct super_block *sb); | |
212 | extern int zfs_remount(struct super_block *sb, int *flags, zfs_mntopts_t *zmo); | |
213 | extern int zfs_root(zfs_sb_t *zsb, struct inode **ipp); | |
214 | extern int zfs_statvfs(struct dentry *dentry, struct kstatfs *statp); | |
215 | extern int zfs_vget(struct super_block *sb, struct inode **ipp, fid_t *fidp); | |
216 | ||
217 | #ifdef __cplusplus | |
218 | } | |
219 | #endif | |
220 | ||
221 | #endif /* _SYS_FS_ZFS_VFSOPS_H */ |