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70e083d2 TG |
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> | |
e0b2cca7 | 35 | #include <sys/dsl_dataset.h> |
70e083d2 TG |
36 | #include <sys/zfs_ioctl.h> |
37 | ||
38 | #ifdef __cplusplus | |
39 | extern "C" { | |
40 | #endif | |
41 | ||
86e3c28a | 42 | typedef struct zfsvfs zfsvfs_t; |
70e083d2 TG |
43 | struct znode; |
44 | ||
86e3c28a CIK |
45 | /* |
46 | * This structure emulates the vfs_t from other platforms. It's purpose | |
47 | * is to faciliate the handling of mount options and minimize structural | |
48 | * differences between the platforms. | |
49 | */ | |
50 | typedef struct vfs { | |
51 | struct zfsvfs *vfs_data; | |
52 | char *vfs_mntpoint; /* Primary mount point */ | |
53 | uint64_t vfs_xattr; | |
54 | boolean_t vfs_readonly; | |
55 | boolean_t vfs_do_readonly; | |
56 | boolean_t vfs_setuid; | |
57 | boolean_t vfs_do_setuid; | |
58 | boolean_t vfs_exec; | |
59 | boolean_t vfs_do_exec; | |
60 | boolean_t vfs_devices; | |
61 | boolean_t vfs_do_devices; | |
62 | boolean_t vfs_do_xattr; | |
63 | boolean_t vfs_atime; | |
64 | boolean_t vfs_do_atime; | |
65 | boolean_t vfs_relatime; | |
66 | boolean_t vfs_do_relatime; | |
67 | boolean_t vfs_nbmand; | |
68 | boolean_t vfs_do_nbmand; | |
69 | } vfs_t; | |
70 | ||
71 | typedef struct zfs_mnt { | |
72 | const char *mnt_osname; /* Objset name */ | |
73 | char *mnt_data; /* Raw mount options */ | |
74 | } zfs_mnt_t; | |
75 | ||
76 | struct zfsvfs { | |
77 | vfs_t *z_vfs; /* generic fs struct */ | |
70e083d2 | 78 | struct super_block *z_sb; /* generic super_block */ |
86e3c28a | 79 | struct zfsvfs *z_parent; /* parent fs */ |
70e083d2 | 80 | objset_t *z_os; /* objset reference */ |
70e083d2 TG |
81 | uint64_t z_flags; /* super_block flags */ |
82 | uint64_t z_root; /* id of root znode */ | |
83 | uint64_t z_unlinkedobj; /* id of unlinked zapobj */ | |
84 | uint64_t z_max_blksz; /* maximum block size for files */ | |
85 | uint64_t z_fuid_obj; /* fuid table object number */ | |
86 | uint64_t z_fuid_size; /* fuid table size */ | |
87 | avl_tree_t z_fuid_idx; /* fuid tree keyed by index */ | |
88 | avl_tree_t z_fuid_domain; /* fuid tree keyed by domain */ | |
89 | krwlock_t z_fuid_lock; /* fuid lock */ | |
90 | boolean_t z_fuid_loaded; /* fuid tables are loaded */ | |
91 | boolean_t z_fuid_dirty; /* need to sync fuid table ? */ | |
92 | struct zfs_fuid_info *z_fuid_replay; /* fuid info for replay */ | |
93 | zilog_t *z_log; /* intent log pointer */ | |
94 | uint_t z_acl_inherit; /* acl inheritance behavior */ | |
95 | uint_t z_acl_type; /* type of ACL usable on this FS */ | |
96 | zfs_case_t z_case; /* case-sense */ | |
97 | boolean_t z_utf8; /* utf8-only */ | |
98 | int z_norm; /* normalization flags */ | |
99 | boolean_t z_atime; /* enable atimes mount option */ | |
100 | boolean_t z_relatime; /* enable relatime mount option */ | |
101 | boolean_t z_unmounted; /* unmounted */ | |
102 | rrmlock_t z_teardown_lock; | |
103 | krwlock_t z_teardown_inactive_lock; | |
104 | list_t z_all_znodes; /* all znodes in the fs */ | |
105 | uint64_t z_nr_znodes; /* number of znodes in the fs */ | |
106 | unsigned long z_rollback_time; /* last online rollback time */ | |
107 | unsigned long z_snap_defer_time; /* last snapshot unmount deferal */ | |
108 | kmutex_t z_znodes_lock; /* lock for z_all_znodes */ | |
109 | arc_prune_t *z_arc_prune; /* called by ARC to prune caches */ | |
110 | struct inode *z_ctldir; /* .zfs directory inode */ | |
111 | boolean_t z_show_ctldir; /* expose .zfs in the root dir */ | |
112 | boolean_t z_issnap; /* true if this is a snapshot */ | |
113 | boolean_t z_vscan; /* virus scan on/off */ | |
114 | boolean_t z_use_fuids; /* version allows fuids */ | |
115 | boolean_t z_replay; /* set during ZIL replay */ | |
116 | boolean_t z_use_sa; /* version allow system attributes */ | |
117 | boolean_t z_xattr_sa; /* allow xattrs to be stores as SA */ | |
118 | uint64_t z_version; /* ZPL version */ | |
119 | uint64_t z_shares_dir; /* hidden shares dir */ | |
120 | kmutex_t z_lock; | |
121 | uint64_t z_userquota_obj; | |
122 | uint64_t z_groupquota_obj; | |
86e3c28a CIK |
123 | uint64_t z_userobjquota_obj; |
124 | uint64_t z_groupobjquota_obj; | |
70e083d2 TG |
125 | uint64_t z_replay_eof; /* New end of file - replay only */ |
126 | sa_attr_type_t *z_attr_table; /* SA attr mapping->id */ | |
127 | uint64_t z_hold_size; /* znode hold array size */ | |
128 | avl_tree_t *z_hold_trees; /* znode hold trees */ | |
129 | kmutex_t *z_hold_locks; /* znode hold locks */ | |
86e3c28a | 130 | }; |
70e083d2 TG |
131 | |
132 | #define ZSB_XATTR 0x0001 /* Enable user xattrs */ | |
133 | ||
134 | /* | |
135 | * Allow a maximum number of links. While ZFS does not internally limit | |
136 | * this the inode->i_nlink member is defined as an unsigned int. To be | |
137 | * safe we use 2^31-1 as the limit. | |
138 | */ | |
139 | #define ZFS_LINK_MAX ((1U << 31) - 1U) | |
140 | ||
141 | /* | |
142 | * Normal filesystems (those not under .zfs/snapshot) have a total | |
143 | * file ID size limited to 12 bytes (including the length field) due to | |
144 | * NFSv2 protocol's limitation of 32 bytes for a filehandle. For historical | |
145 | * reasons, this same limit is being imposed by the Solaris NFSv3 implementation | |
146 | * (although the NFSv3 protocol actually permits a maximum of 64 bytes). It | |
147 | * is not possible to expand beyond 12 bytes without abandoning support | |
148 | * of NFSv2. | |
149 | * | |
150 | * For normal filesystems, we partition up the available space as follows: | |
151 | * 2 bytes fid length (required) | |
152 | * 6 bytes object number (48 bits) | |
153 | * 4 bytes generation number (32 bits) | |
154 | * | |
155 | * We reserve only 48 bits for the object number, as this is the limit | |
156 | * currently defined and imposed by the DMU. | |
157 | */ | |
158 | typedef struct zfid_short { | |
159 | uint16_t zf_len; | |
160 | uint8_t zf_object[6]; /* obj[i] = obj >> (8 * i) */ | |
161 | uint8_t zf_gen[4]; /* gen[i] = gen >> (8 * i) */ | |
162 | } zfid_short_t; | |
163 | ||
164 | /* | |
165 | * Filesystems under .zfs/snapshot have a total file ID size of 22 bytes | |
166 | * (including the length field). This makes files under .zfs/snapshot | |
167 | * accessible by NFSv3 and NFSv4, but not NFSv2. | |
168 | * | |
169 | * For files under .zfs/snapshot, we partition up the available space | |
170 | * as follows: | |
171 | * 2 bytes fid length (required) | |
172 | * 6 bytes object number (48 bits) | |
173 | * 4 bytes generation number (32 bits) | |
174 | * 6 bytes objset id (48 bits) | |
175 | * 4 bytes currently just zero (32 bits) | |
176 | * | |
177 | * We reserve only 48 bits for the object number and objset id, as these are | |
178 | * the limits currently defined and imposed by the DMU. | |
179 | */ | |
180 | typedef struct zfid_long { | |
181 | zfid_short_t z_fid; | |
182 | uint8_t zf_setid[6]; /* obj[i] = obj >> (8 * i) */ | |
183 | uint8_t zf_setgen[4]; /* gen[i] = gen >> (8 * i) */ | |
184 | } zfid_long_t; | |
185 | ||
186 | #define SHORT_FID_LEN (sizeof (zfid_short_t) - sizeof (uint16_t)) | |
187 | #define LONG_FID_LEN (sizeof (zfid_long_t) - sizeof (uint16_t)) | |
188 | ||
189 | extern uint_t zfs_fsyncer_key; | |
190 | ||
86e3c28a CIK |
191 | extern int zfs_suspend_fs(zfsvfs_t *zfsvfs); |
192 | extern int zfs_resume_fs(zfsvfs_t *zfsvfs, struct dsl_dataset *ds); | |
193 | extern int zfs_userspace_one(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, | |
70e083d2 | 194 | const char *domain, uint64_t rid, uint64_t *valuep); |
86e3c28a | 195 | extern int zfs_userspace_many(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, |
70e083d2 | 196 | uint64_t *cookiep, void *vbuf, uint64_t *bufsizep); |
86e3c28a | 197 | extern int zfs_set_userquota(zfsvfs_t *zfsvfs, zfs_userquota_prop_t type, |
70e083d2 | 198 | const char *domain, uint64_t rid, uint64_t quota); |
86e3c28a | 199 | extern boolean_t zfs_owner_overquota(zfsvfs_t *zfsvfs, struct znode *, |
70e083d2 | 200 | boolean_t isgroup); |
86e3c28a | 201 | extern boolean_t zfs_fuid_overquota(zfsvfs_t *zfsvfs, boolean_t isgroup, |
70e083d2 | 202 | uint64_t fuid); |
86e3c28a CIK |
203 | extern boolean_t zfs_fuid_overobjquota(zfsvfs_t *zfsvfs, boolean_t isgroup, |
204 | uint64_t fuid); | |
205 | extern int zfs_set_version(zfsvfs_t *zfsvfs, uint64_t newvers); | |
206 | extern int zfsvfs_create(const char *name, zfsvfs_t **zfvp); | |
207 | extern void zfsvfs_free(zfsvfs_t *zfsvfs); | |
70e083d2 | 208 | extern int zfs_check_global_label(const char *dsname, const char *hexsl); |
70e083d2 | 209 | |
86e3c28a CIK |
210 | extern boolean_t zfs_is_readonly(zfsvfs_t *zfsvfs); |
211 | extern int zfs_domount(struct super_block *sb, zfs_mnt_t *zm, int silent); | |
70e083d2 TG |
212 | extern void zfs_preumount(struct super_block *sb); |
213 | extern int zfs_umount(struct super_block *sb); | |
86e3c28a | 214 | extern int zfs_remount(struct super_block *sb, int *flags, zfs_mnt_t *zm); |
70e083d2 TG |
215 | extern int zfs_statvfs(struct dentry *dentry, struct kstatfs *statp); |
216 | extern int zfs_vget(struct super_block *sb, struct inode **ipp, fid_t *fidp); | |
86e3c28a CIK |
217 | extern int zfs_prune(struct super_block *sb, unsigned long nr_to_scan, |
218 | int *objects); | |
70e083d2 TG |
219 | |
220 | #ifdef __cplusplus | |
221 | } | |
222 | #endif | |
223 | ||
224 | #endif /* _SYS_FS_ZFS_VFSOPS_H */ |