2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
14 * or the like. Any license provided herein, whether implied or
15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
28 * For further information regarding this notice, see:
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
35 #include <linux/vfs.h>
44 struct xfs_mount_args;
46 typedef struct kstatfs xfs_statfs_t;
49 u_int vfs_flag; /* flags */
50 xfs_fsid_t vfs_fsid; /* file system ID */
51 xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */
52 bhv_head_t vfs_bh; /* head of vfs behavior chain */
53 struct super_block *vfs_super; /* Linux superblock structure */
54 struct task_struct *vfs_sync_task; /* xfssyncd process */
55 int vfs_sync_seq; /* xfssyncd generation number */
56 wait_queue_head_t vfs_wait_single_sync_task;
57 wait_queue_head_t vfs_wait_sync_task;
60 #define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */
62 #define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) )
63 #define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) )
64 #define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
65 #define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
67 #define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
68 #define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
69 #define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
72 VFS_BHV_UNKNOWN, /* not specified */
73 VFS_BHV_XFS, /* xfs */
74 VFS_BHV_DM, /* data migration */
75 VFS_BHV_QM, /* quota manager */
76 VFS_BHV_IO, /* IO path */
77 VFS_BHV_END /* housekeeping end-of-range */
80 #define VFS_POSITION_XFS (BHV_POSITION_BASE)
81 #define VFS_POSITION_DM (VFS_POSITION_BASE+10)
82 #define VFS_POSITION_QM (VFS_POSITION_BASE+20)
83 #define VFS_POSITION_IO (VFS_POSITION_BASE+30)
85 #define VFS_RDONLY 0x0001 /* read-only vfs */
86 #define VFS_GRPID 0x0002 /* group-ID assigned from directory */
87 #define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
88 #define VFS_UMOUNT 0x0008 /* unmount in progress */
89 #define VFS_END 0x0008 /* max flag */
91 #define SYNC_ATTR 0x0001 /* sync attributes */
92 #define SYNC_CLOSE 0x0002 /* close file system down */
93 #define SYNC_DELWRI 0x0004 /* look at delayed writes */
94 #define SYNC_WAIT 0x0008 /* wait for i/o to complete */
95 #define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
96 #define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
97 #define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
98 #define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
100 typedef int (*vfs_mount_t)(bhv_desc_t *,
101 struct xfs_mount_args *, struct cred *);
102 typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
103 struct xfs_mount_args *, int);
104 typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
105 typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
106 typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
107 struct xfs_mount_args *);
108 typedef int (*vfs_root_t)(bhv_desc_t *, struct vnode **);
109 typedef int (*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
110 typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
111 typedef int (*vfs_vget_t)(bhv_desc_t *, struct vnode **, struct fid *);
112 typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
113 typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
114 typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
115 struct vnode *, bhv_desc_t *, int);
116 typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
117 typedef void (*vfs_freeze_t)(bhv_desc_t *);
119 typedef struct vfsops {
120 bhv_position_t vf_position; /* behavior chain position */
121 vfs_mount_t vfs_mount; /* mount file system */
122 vfs_parseargs_t vfs_parseargs; /* parse mount options */
123 vfs_showargs_t vfs_showargs; /* unparse mount options */
124 vfs_unmount_t vfs_unmount; /* unmount file system */
125 vfs_mntupdate_t vfs_mntupdate; /* update file system options */
126 vfs_root_t vfs_root; /* get root vnode */
127 vfs_statvfs_t vfs_statvfs; /* file system statistics */
128 vfs_sync_t vfs_sync; /* flush files */
129 vfs_vget_t vfs_vget; /* get vnode from fid */
130 vfs_dmapiops_t vfs_dmapiops; /* data migration */
131 vfs_quotactl_t vfs_quotactl; /* disk quota */
132 vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
133 vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
134 vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
138 * VFS's. Operates on vfs structure pointers (starts at bhv head).
140 #define VHEAD(v) ((v)->vfs_fbhv)
141 #define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr))
142 #define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
143 #define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m))
144 #define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr))
145 #define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args))
146 #define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp))
147 #define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp))
148 #define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr))
149 #define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp))
150 #define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p))
151 #define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p))
152 #define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) )
153 #define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) )
154 #define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) )
157 * PVFS's. Operates on behavior descriptor pointers.
159 #define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr))
160 #define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f))
161 #define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m))
162 #define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr))
163 #define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args))
164 #define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp))
165 #define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp))
166 #define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr))
167 #define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp))
168 #define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p))
169 #define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p))
170 #define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) )
171 #define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) )
172 #define PVFS_FREEZE(b) ( vfs_freeze(b) )
174 extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
175 extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
176 extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
177 extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
178 extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
179 extern int vfs_root(bhv_desc_t *, struct vnode **);
180 extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
181 extern int vfs_sync(bhv_desc_t *, int, struct cred *);
182 extern int vfs_vget(bhv_desc_t *, struct vnode **, struct fid *);
183 extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
184 extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
185 extern void vfs_init_vnode(bhv_desc_t *, struct vnode *, bhv_desc_t *, int);
186 extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
187 extern void vfs_freeze(bhv_desc_t *);
189 typedef struct bhv_vfsops {
190 struct vfsops bhv_common;
194 #define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
195 #define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom )
196 #define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o))
197 #define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL )
199 extern vfs_t *vfs_allocate(void);
200 extern void vfs_deallocate(vfs_t *);
201 extern void vfs_insertops(vfs_t *, bhv_vfsops_t *);
202 extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *);
204 extern void bhv_insert_all_vfsops(struct vfs *);
205 extern void bhv_remove_all_vfsops(struct vfs *, int);
206 extern void bhv_remove_vfsops(struct vfs *, int);
208 #endif /* __XFS_VFS_H__ */