2 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
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
7 * published by the Free Software Foundation.
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.
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
21 #include <linux/vfs.h>
31 struct xfs_mount_args;
33 typedef struct kstatfs bhv_statvfs_t;
35 typedef struct bhv_vfs_sync_work {
36 struct list_head w_list;
37 struct bhv_vfs *w_vfs;
38 void *w_data; /* syncer routine argument */
39 void (*w_syncer)(struct bhv_vfs *, void *);
40 } bhv_vfs_sync_work_t;
42 typedef struct bhv_vfs {
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 */
49 bhv_vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
50 struct list_head vfs_sync_list; /* sync thread work item list */
51 spinlock_t vfs_sync_lock; /* work item list lock */
52 int vfs_sync_seq; /* sync thread generation no. */
53 wait_queue_head_t vfs_wait_single_sync_task;
56 #define bhvtovfs(bdp) ( (struct bhv_vfs *)BHV_VOBJ(bdp) )
57 #define bhvtovfsops(bdp) ( (struct bhv_vfsops *)BHV_OPS(bdp) )
58 #define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
59 #define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
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 */
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 */
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)
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 */
82 #define VFS_UMOUNT 0x0008 /* unmount in progress */
83 #define VFS_32BITINODES 0x0010 /* do not use inums above 32 bits */
84 #define VFS_END 0x0010 /* max flag */
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 */
94 #define SYNC_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */
96 #define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
97 #define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
98 #define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
99 #define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
100 #define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
101 #define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
103 typedef int (*vfs_mount_t)(bhv_desc_t *,
104 struct xfs_mount_args *, struct cred *);
105 typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
106 struct xfs_mount_args *, int);
107 typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
108 typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
109 typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
110 struct xfs_mount_args *);
111 typedef int (*vfs_root_t)(bhv_desc_t *, struct bhv_vnode **);
112 typedef int (*vfs_statvfs_t)(bhv_desc_t *, bhv_statvfs_t *,
114 typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
115 typedef int (*vfs_vget_t)(bhv_desc_t *, struct bhv_vnode **, struct fid *);
116 typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
117 typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
118 typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
119 struct bhv_vnode *, bhv_desc_t *, int);
120 typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
121 typedef void (*vfs_freeze_t)(bhv_desc_t *);
123 typedef struct bhv_vfsops {
124 bhv_position_t vf_position; /* behavior chain position */
125 vfs_mount_t vfs_mount; /* mount file system */
126 vfs_parseargs_t vfs_parseargs; /* parse mount options */
127 vfs_showargs_t vfs_showargs; /* unparse mount options */
128 vfs_unmount_t vfs_unmount; /* unmount file system */
129 vfs_mntupdate_t vfs_mntupdate; /* update file system options */
130 vfs_root_t vfs_root; /* get root vnode */
131 vfs_statvfs_t vfs_statvfs; /* file system statistics */
132 vfs_sync_t vfs_sync; /* flush files */
133 vfs_vget_t vfs_vget; /* get vnode from fid */
134 vfs_dmapiops_t vfs_dmapiops; /* data migration */
135 vfs_quotactl_t vfs_quotactl; /* disk quota */
136 vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
137 vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
138 vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
142 * Virtual filesystem operations, operating from head bhv.
144 #define VFSHEAD(v) ((v)->vfs_bh.bh_first)
145 #define bhv_vfs_mount(v, ma,cr) vfs_mount(VFSHEAD(v), ma,cr)
146 #define bhv_vfs_parseargs(v, o,ma,f) vfs_parseargs(VFSHEAD(v), o,ma,f)
147 #define bhv_vfs_showargs(v, m) vfs_showargs(VFSHEAD(v), m)
148 #define bhv_vfs_unmount(v, f,cr) vfs_unmount(VFSHEAD(v), f,cr)
149 #define bhv_vfs_mntupdate(v, fl,args) vfs_mntupdate(VFSHEAD(v), fl,args)
150 #define bhv_vfs_root(v, vpp) vfs_root(VFSHEAD(v), vpp)
151 #define bhv_vfs_statvfs(v, sp,vp) vfs_statvfs(VFSHEAD(v), sp,vp)
152 #define bhv_vfs_sync(v, flag,cr) vfs_sync(VFSHEAD(v), flag,cr)
153 #define bhv_vfs_vget(v, vpp,fidp) vfs_vget(VFSHEAD(v), vpp,fidp)
154 #define bhv_vfs_dmapiops(v, p) vfs_dmapiops(VFSHEAD(v), p)
155 #define bhv_vfs_quotactl(v, c,id,p) vfs_quotactl(VFSHEAD(v), c,id,p)
156 #define bhv_vfs_init_vnode(v, vp,b,ul) vfs_init_vnode(VFSHEAD(v), vp,b,ul)
157 #define bhv_vfs_force_shutdown(v,u,f,l) vfs_force_shutdown(VFSHEAD(v), u,f,l)
158 #define bhv_vfs_freeze(v) vfs_freeze(VFSHEAD(v))
161 * Virtual filesystem operations, operating from next bhv.
163 #define bhv_next_vfs_mount(b, ma,cr) vfs_mount(b, ma,cr)
164 #define bhv_next_vfs_parseargs(b, o,ma,f) vfs_parseargs(b, o,ma,f)
165 #define bhv_next_vfs_showargs(b, m) vfs_showargs(b, m)
166 #define bhv_next_vfs_unmount(b, f,cr) vfs_unmount(b, f,cr)
167 #define bhv_next_vfs_mntupdate(b, fl,args) vfs_mntupdate(b, fl, args)
168 #define bhv_next_vfs_root(b, vpp) vfs_root(b, vpp)
169 #define bhv_next_vfs_statvfs(b, sp,vp) vfs_statvfs(b, sp,vp)
170 #define bhv_next_vfs_sync(b, flag,cr) vfs_sync(b, flag,cr)
171 #define bhv_next_vfs_vget(b, vpp,fidp) vfs_vget(b, vpp,fidp)
172 #define bhv_next_vfs_dmapiops(b, p) vfs_dmapiops(b, p)
173 #define bhv_next_vfs_quotactl(b, c,id,p) vfs_quotactl(b, c,id,p)
174 #define bhv_next_vfs_init_vnode(b, vp,b2,ul) vfs_init_vnode(b, vp,b2,ul)
175 #define bhv_next_force_shutdown(b, fl,f,l) vfs_force_shutdown(b, fl,f,l)
176 #define bhv_next_vfs_freeze(b) vfs_freeze(b)
178 extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
179 extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
180 extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
181 extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
182 extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
183 extern int vfs_root(bhv_desc_t *, struct bhv_vnode **);
184 extern int vfs_statvfs(bhv_desc_t *, bhv_statvfs_t *, struct bhv_vnode *);
185 extern int vfs_sync(bhv_desc_t *, int, struct cred *);
186 extern int vfs_vget(bhv_desc_t *, struct bhv_vnode **, struct fid *);
187 extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
188 extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
189 extern void vfs_init_vnode(bhv_desc_t *, struct bhv_vnode *, bhv_desc_t *, int);
190 extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
191 extern void vfs_freeze(bhv_desc_t *);
193 #define vfs_test_for_freeze(vfs) ((vfs)->vfs_super->s_frozen)
194 #define vfs_wait_for_freeze(vfs,l) vfs_check_frozen((vfs)->vfs_super, (l))
196 typedef struct bhv_module_vfsops {
197 struct bhv_vfsops bhv_common;
199 } bhv_module_vfsops_t;
201 #define vfs_bhv_lookup(v, id) (bhv_lookup_range(&(v)->vfs_bh, (id), (id)))
202 #define vfs_bhv_custom(b) (((bhv_module_vfsops_t*)BHV_OPS(b))->bhv_custom)
203 #define vfs_bhv_set_custom(b,o) ((b)->bhv_custom = (void *)(o))
204 #define vfs_bhv_clr_custom(b) ((b)->bhv_custom = NULL)
206 extern bhv_vfs_t *vfs_allocate(struct super_block *);
207 extern bhv_vfs_t *vfs_from_sb(struct super_block *);
208 extern void vfs_deallocate(bhv_vfs_t *);
209 extern void vfs_insertbhv(bhv_vfs_t *, bhv_desc_t *, bhv_vfsops_t *, void *);
211 extern void vfs_insertops(bhv_vfs_t *, bhv_module_vfsops_t *);
213 extern void bhv_insert_all_vfsops(struct bhv_vfs *);
214 extern void bhv_remove_all_vfsops(struct bhv_vfs *, int);
215 extern void bhv_remove_vfsops(struct bhv_vfs *, int);
217 #endif /* __XFS_VFS_H__ */