Commit | Line | Data |
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1da177e4 | 1 | /* |
b83bd138 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_VFS_H__ | |
19 | #define __XFS_VFS_H__ | |
20 | ||
21 | #include <linux/vfs.h> | |
22 | #include "xfs_fs.h" | |
23 | ||
b83bd138 | 24 | struct bhv_vfs; |
67fcaa73 | 25 | struct bhv_vnode; |
8285fb58 | 26 | |
1da177e4 | 27 | struct fid; |
1da177e4 | 28 | struct cred; |
1da177e4 LT |
29 | struct seq_file; |
30 | struct super_block; | |
31 | struct xfs_mount_args; | |
32 | ||
8285fb58 | 33 | typedef struct kstatfs bhv_statvfs_t; |
1da177e4 | 34 | |
b83bd138 | 35 | typedef struct bhv_vfs_sync_work { |
1da177e4 | 36 | struct list_head w_list; |
b83bd138 | 37 | struct bhv_vfs *w_vfs; |
1da177e4 | 38 | void *w_data; /* syncer routine argument */ |
b83bd138 NS |
39 | void (*w_syncer)(struct bhv_vfs *, void *); |
40 | } bhv_vfs_sync_work_t; | |
1da177e4 | 41 | |
b83bd138 | 42 | typedef struct bhv_vfs { |
1da177e4 LT |
43 | u_int vfs_flag; /* flags */ |
44 | xfs_fsid_t vfs_fsid; /* file system ID */ | |
45 | xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */ | |
46 | bhv_head_t vfs_bh; /* head of vfs behavior chain */ | |
47 | struct super_block *vfs_super; /* generic superblock pointer */ | |
48 | struct task_struct *vfs_sync_task; /* generalised sync thread */ | |
b83bd138 | 49 | bhv_vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */ |
1da177e4 LT |
50 | struct list_head vfs_sync_list; /* sync thread work item list */ |
51 | spinlock_t vfs_sync_lock; /* work item list lock */ | |
b83bd138 | 52 | int vfs_sync_seq; /* sync thread generation no. */ |
1da177e4 | 53 | wait_queue_head_t vfs_wait_single_sync_task; |
b83bd138 | 54 | } bhv_vfs_t; |
1da177e4 | 55 | |
b83bd138 NS |
56 | #define bhvtovfs(bdp) ( (struct bhv_vfs *)BHV_VOBJ(bdp) ) |
57 | #define bhvtovfsops(bdp) ( (struct bhv_vfsops *)BHV_OPS(bdp) ) | |
1da177e4 LT |
58 | #define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh ) |
59 | #define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) ) | |
60 | ||
61 | #define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */ | |
62 | #define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */ | |
63 | #define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */ | |
64 | ||
65 | typedef enum { | |
66 | VFS_BHV_UNKNOWN, /* not specified */ | |
67 | VFS_BHV_XFS, /* xfs */ | |
68 | VFS_BHV_DM, /* data migration */ | |
69 | VFS_BHV_QM, /* quota manager */ | |
70 | VFS_BHV_IO, /* IO path */ | |
71 | VFS_BHV_END /* housekeeping end-of-range */ | |
b83bd138 | 72 | } bhv_vfs_type_t; |
1da177e4 LT |
73 | |
74 | #define VFS_POSITION_XFS (BHV_POSITION_BASE) | |
75 | #define VFS_POSITION_DM (VFS_POSITION_BASE+10) | |
76 | #define VFS_POSITION_QM (VFS_POSITION_BASE+20) | |
77 | #define VFS_POSITION_IO (VFS_POSITION_BASE+30) | |
78 | ||
79 | #define VFS_RDONLY 0x0001 /* read-only vfs */ | |
80 | #define VFS_GRPID 0x0002 /* group-ID assigned from directory */ | |
81 | #define VFS_DMI 0x0004 /* filesystem has the DMI enabled */ | |
29b6d22b | 82 | /* ---- VFS_UMOUNT ---- 0x0008 -- unneeded, fixed via kthread APIs */ |
b83bd138 NS |
83 | #define VFS_32BITINODES 0x0010 /* do not use inums above 32 bits */ |
84 | #define VFS_END 0x0010 /* max flag */ | |
1da177e4 LT |
85 | |
86 | #define SYNC_ATTR 0x0001 /* sync attributes */ | |
87 | #define SYNC_CLOSE 0x0002 /* close file system down */ | |
88 | #define SYNC_DELWRI 0x0004 /* look at delayed writes */ | |
89 | #define SYNC_WAIT 0x0008 /* wait for i/o to complete */ | |
90 | #define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */ | |
91 | #define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */ | |
92 | #define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */ | |
93 | #define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */ | |
3c0dc77b | 94 | #define SYNC_IOWAIT 0x0100 /* wait for all I/O to complete */ |
92821e2b | 95 | #define SYNC_SUPER 0x0200 /* flush superblock to disk */ |
1da177e4 | 96 | |
7d04a335 NS |
97 | #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */ |
98 | #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */ | |
99 | #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */ | |
100 | #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */ | |
101 | #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */ | |
102 | #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */ | |
103 | ||
1da177e4 LT |
104 | typedef int (*vfs_mount_t)(bhv_desc_t *, |
105 | struct xfs_mount_args *, struct cred *); | |
106 | typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *, | |
107 | struct xfs_mount_args *, int); | |
108 | typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *); | |
109 | typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *); | |
110 | typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *, | |
111 | struct xfs_mount_args *); | |
67fcaa73 | 112 | typedef int (*vfs_root_t)(bhv_desc_t *, struct bhv_vnode **); |
8285fb58 | 113 | typedef int (*vfs_statvfs_t)(bhv_desc_t *, bhv_statvfs_t *, |
67fcaa73 | 114 | struct bhv_vnode *); |
1da177e4 | 115 | typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *); |
67fcaa73 | 116 | typedef int (*vfs_vget_t)(bhv_desc_t *, struct bhv_vnode **, struct fid *); |
1da177e4 LT |
117 | typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t); |
118 | typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t); | |
119 | typedef void (*vfs_init_vnode_t)(bhv_desc_t *, | |
67fcaa73 | 120 | struct bhv_vnode *, bhv_desc_t *, int); |
1da177e4 LT |
121 | typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int); |
122 | typedef void (*vfs_freeze_t)(bhv_desc_t *); | |
123 | ||
b83bd138 | 124 | typedef struct bhv_vfsops { |
1da177e4 LT |
125 | bhv_position_t vf_position; /* behavior chain position */ |
126 | vfs_mount_t vfs_mount; /* mount file system */ | |
127 | vfs_parseargs_t vfs_parseargs; /* parse mount options */ | |
128 | vfs_showargs_t vfs_showargs; /* unparse mount options */ | |
129 | vfs_unmount_t vfs_unmount; /* unmount file system */ | |
130 | vfs_mntupdate_t vfs_mntupdate; /* update file system options */ | |
131 | vfs_root_t vfs_root; /* get root vnode */ | |
132 | vfs_statvfs_t vfs_statvfs; /* file system statistics */ | |
133 | vfs_sync_t vfs_sync; /* flush files */ | |
134 | vfs_vget_t vfs_vget; /* get vnode from fid */ | |
135 | vfs_dmapiops_t vfs_dmapiops; /* data migration */ | |
136 | vfs_quotactl_t vfs_quotactl; /* disk quota */ | |
137 | vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */ | |
138 | vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */ | |
139 | vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */ | |
b83bd138 | 140 | } bhv_vfsops_t; |
1da177e4 LT |
141 | |
142 | /* | |
67fcaa73 | 143 | * Virtual filesystem operations, operating from head bhv. |
1da177e4 | 144 | */ |
67fcaa73 NS |
145 | #define VFSHEAD(v) ((v)->vfs_bh.bh_first) |
146 | #define bhv_vfs_mount(v, ma,cr) vfs_mount(VFSHEAD(v), ma,cr) | |
147 | #define bhv_vfs_parseargs(v, o,ma,f) vfs_parseargs(VFSHEAD(v), o,ma,f) | |
148 | #define bhv_vfs_showargs(v, m) vfs_showargs(VFSHEAD(v), m) | |
149 | #define bhv_vfs_unmount(v, f,cr) vfs_unmount(VFSHEAD(v), f,cr) | |
150 | #define bhv_vfs_mntupdate(v, fl,args) vfs_mntupdate(VFSHEAD(v), fl,args) | |
151 | #define bhv_vfs_root(v, vpp) vfs_root(VFSHEAD(v), vpp) | |
152 | #define bhv_vfs_statvfs(v, sp,vp) vfs_statvfs(VFSHEAD(v), sp,vp) | |
153 | #define bhv_vfs_sync(v, flag,cr) vfs_sync(VFSHEAD(v), flag,cr) | |
154 | #define bhv_vfs_vget(v, vpp,fidp) vfs_vget(VFSHEAD(v), vpp,fidp) | |
155 | #define bhv_vfs_dmapiops(v, p) vfs_dmapiops(VFSHEAD(v), p) | |
156 | #define bhv_vfs_quotactl(v, c,id,p) vfs_quotactl(VFSHEAD(v), c,id,p) | |
157 | #define bhv_vfs_init_vnode(v, vp,b,ul) vfs_init_vnode(VFSHEAD(v), vp,b,ul) | |
158 | #define bhv_vfs_force_shutdown(v,u,f,l) vfs_force_shutdown(VFSHEAD(v), u,f,l) | |
159 | #define bhv_vfs_freeze(v) vfs_freeze(VFSHEAD(v)) | |
1da177e4 LT |
160 | |
161 | /* | |
67fcaa73 | 162 | * Virtual filesystem operations, operating from next bhv. |
1da177e4 | 163 | */ |
b83bd138 NS |
164 | #define bhv_next_vfs_mount(b, ma,cr) vfs_mount(b, ma,cr) |
165 | #define bhv_next_vfs_parseargs(b, o,ma,f) vfs_parseargs(b, o,ma,f) | |
166 | #define bhv_next_vfs_showargs(b, m) vfs_showargs(b, m) | |
167 | #define bhv_next_vfs_unmount(b, f,cr) vfs_unmount(b, f,cr) | |
168 | #define bhv_next_vfs_mntupdate(b, fl,args) vfs_mntupdate(b, fl, args) | |
169 | #define bhv_next_vfs_root(b, vpp) vfs_root(b, vpp) | |
170 | #define bhv_next_vfs_statvfs(b, sp,vp) vfs_statvfs(b, sp,vp) | |
171 | #define bhv_next_vfs_sync(b, flag,cr) vfs_sync(b, flag,cr) | |
172 | #define bhv_next_vfs_vget(b, vpp,fidp) vfs_vget(b, vpp,fidp) | |
173 | #define bhv_next_vfs_dmapiops(b, p) vfs_dmapiops(b, p) | |
174 | #define bhv_next_vfs_quotactl(b, c,id,p) vfs_quotactl(b, c,id,p) | |
175 | #define bhv_next_vfs_init_vnode(b, vp,b2,ul) vfs_init_vnode(b, vp,b2,ul) | |
176 | #define bhv_next_force_shutdown(b, fl,f,l) vfs_force_shutdown(b, fl,f,l) | |
177 | #define bhv_next_vfs_freeze(b) vfs_freeze(b) | |
1da177e4 LT |
178 | |
179 | extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *); | |
180 | extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int); | |
181 | extern int vfs_showargs(bhv_desc_t *, struct seq_file *); | |
182 | extern int vfs_unmount(bhv_desc_t *, int, struct cred *); | |
183 | extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *); | |
67fcaa73 | 184 | extern int vfs_root(bhv_desc_t *, struct bhv_vnode **); |
8285fb58 | 185 | extern int vfs_statvfs(bhv_desc_t *, bhv_statvfs_t *, struct bhv_vnode *); |
1da177e4 | 186 | extern int vfs_sync(bhv_desc_t *, int, struct cred *); |
67fcaa73 | 187 | extern int vfs_vget(bhv_desc_t *, struct bhv_vnode **, struct fid *); |
1da177e4 LT |
188 | extern int vfs_dmapiops(bhv_desc_t *, caddr_t); |
189 | extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t); | |
67fcaa73 | 190 | extern void vfs_init_vnode(bhv_desc_t *, struct bhv_vnode *, bhv_desc_t *, int); |
1da177e4 LT |
191 | extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int); |
192 | extern void vfs_freeze(bhv_desc_t *); | |
193 | ||
34327e13 NS |
194 | #define vfs_test_for_freeze(vfs) ((vfs)->vfs_super->s_frozen) |
195 | #define vfs_wait_for_freeze(vfs,l) vfs_check_frozen((vfs)->vfs_super, (l)) | |
196 | ||
b83bd138 NS |
197 | typedef struct bhv_module_vfsops { |
198 | struct bhv_vfsops bhv_common; | |
1da177e4 | 199 | void * bhv_custom; |
b83bd138 NS |
200 | } bhv_module_vfsops_t; |
201 | ||
202 | #define vfs_bhv_lookup(v, id) (bhv_lookup_range(&(v)->vfs_bh, (id), (id))) | |
203 | #define vfs_bhv_custom(b) (((bhv_module_vfsops_t*)BHV_OPS(b))->bhv_custom) | |
204 | #define vfs_bhv_set_custom(b,o) ((b)->bhv_custom = (void *)(o)) | |
205 | #define vfs_bhv_clr_custom(b) ((b)->bhv_custom = NULL) | |
1da177e4 | 206 | |
b83bd138 NS |
207 | extern bhv_vfs_t *vfs_allocate(struct super_block *); |
208 | extern bhv_vfs_t *vfs_from_sb(struct super_block *); | |
209 | extern void vfs_deallocate(bhv_vfs_t *); | |
210 | extern void vfs_insertbhv(bhv_vfs_t *, bhv_desc_t *, bhv_vfsops_t *, void *); | |
1da177e4 | 211 | |
b83bd138 | 212 | extern void vfs_insertops(bhv_vfs_t *, bhv_module_vfsops_t *); |
1da177e4 | 213 | |
b83bd138 NS |
214 | extern void bhv_insert_all_vfsops(struct bhv_vfs *); |
215 | extern void bhv_remove_all_vfsops(struct bhv_vfs *, int); | |
216 | extern void bhv_remove_vfsops(struct bhv_vfs *, int); | |
1da177e4 | 217 | |
1da177e4 | 218 | #endif /* __XFS_VFS_H__ */ |