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1/*
2 * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved.
3 *
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.
7 *
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.
11 *
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.
18 *
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.
22 *
23 * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
24 * Mountain View, CA 94043, or:
25 *
26 * http://www.sgi.com
27 *
28 * For further information regarding this notice, see:
29 *
30 * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
31 */
32#ifndef __XFS_VFS_H__
33#define __XFS_VFS_H__
34
35#include <linux/vfs.h>
36#include "xfs_fs.h"
37
38struct fid;
39struct vfs;
40struct cred;
41struct vnode;
42struct kstatfs;
43struct seq_file;
44struct super_block;
45struct xfs_mount_args;
46
47typedef struct kstatfs xfs_statfs_t;
48
49typedef struct vfs_sync_work {
50 struct list_head w_list;
51 struct vfs *w_vfs;
52 void *w_data; /* syncer routine argument */
53 void (*w_syncer)(struct vfs *, void *);
54} vfs_sync_work_t;
55
56typedef struct vfs {
57 u_int vfs_flag; /* flags */
58 xfs_fsid_t vfs_fsid; /* file system ID */
59 xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */
60 bhv_head_t vfs_bh; /* head of vfs behavior chain */
61 struct super_block *vfs_super; /* generic superblock pointer */
62 struct task_struct *vfs_sync_task; /* generalised sync thread */
63 vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
64 struct list_head vfs_sync_list; /* sync thread work item list */
65 spinlock_t vfs_sync_lock; /* work item list lock */
66 int vfs_sync_seq; /* sync thread generation no. */
67 wait_queue_head_t vfs_wait_single_sync_task;
68 wait_queue_head_t vfs_wait_sync_task;
69} vfs_t;
70
71#define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */
72
73#define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) )
74#define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) )
75#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
76#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
77
78#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
79#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
80#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
81
82typedef enum {
83 VFS_BHV_UNKNOWN, /* not specified */
84 VFS_BHV_XFS, /* xfs */
85 VFS_BHV_DM, /* data migration */
86 VFS_BHV_QM, /* quota manager */
87 VFS_BHV_IO, /* IO path */
88 VFS_BHV_END /* housekeeping end-of-range */
89} vfs_bhv_t;
90
91#define VFS_POSITION_XFS (BHV_POSITION_BASE)
92#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
93#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
94#define VFS_POSITION_IO (VFS_POSITION_BASE+30)
95
96#define VFS_RDONLY 0x0001 /* read-only vfs */
97#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
98#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
99#define VFS_UMOUNT 0x0008 /* unmount in progress */
100#define VFS_END 0x0008 /* max flag */
101
102#define SYNC_ATTR 0x0001 /* sync attributes */
103#define SYNC_CLOSE 0x0002 /* close file system down */
104#define SYNC_DELWRI 0x0004 /* look at delayed writes */
105#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
106#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
107#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
108#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
109#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
110
111typedef int (*vfs_mount_t)(bhv_desc_t *,
112 struct xfs_mount_args *, struct cred *);
113typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
114 struct xfs_mount_args *, int);
115typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
116typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
117typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
118 struct xfs_mount_args *);
119typedef int (*vfs_root_t)(bhv_desc_t *, struct vnode **);
120typedef int (*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
121typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
122typedef int (*vfs_vget_t)(bhv_desc_t *, struct vnode **, struct fid *);
123typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
124typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
125typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
126 struct vnode *, bhv_desc_t *, int);
127typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
128typedef void (*vfs_freeze_t)(bhv_desc_t *);
129
130typedef struct vfsops {
131 bhv_position_t vf_position; /* behavior chain position */
132 vfs_mount_t vfs_mount; /* mount file system */
133 vfs_parseargs_t vfs_parseargs; /* parse mount options */
134 vfs_showargs_t vfs_showargs; /* unparse mount options */
135 vfs_unmount_t vfs_unmount; /* unmount file system */
136 vfs_mntupdate_t vfs_mntupdate; /* update file system options */
137 vfs_root_t vfs_root; /* get root vnode */
138 vfs_statvfs_t vfs_statvfs; /* file system statistics */
139 vfs_sync_t vfs_sync; /* flush files */
140 vfs_vget_t vfs_vget; /* get vnode from fid */
141 vfs_dmapiops_t vfs_dmapiops; /* data migration */
142 vfs_quotactl_t vfs_quotactl; /* disk quota */
143 vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
144 vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
145 vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
146} vfsops_t;
147
148/*
149 * VFS's. Operates on vfs structure pointers (starts at bhv head).
150 */
151#define VHEAD(v) ((v)->vfs_fbhv)
152#define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr))
153#define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f))
154#define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m))
155#define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr))
156#define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args))
157#define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp))
158#define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp))
159#define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr))
160#define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp))
161#define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p))
162#define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p))
163#define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) )
164#define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) )
165#define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) )
166
167/*
168 * PVFS's. Operates on behavior descriptor pointers.
169 */
170#define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr))
171#define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f))
172#define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m))
173#define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr))
174#define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args))
175#define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp))
176#define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp))
177#define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr))
178#define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp))
179#define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p))
180#define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p))
181#define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) )
182#define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) )
183#define PVFS_FREEZE(b) ( vfs_freeze(b) )
184
185extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
186extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
187extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
188extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
189extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
190extern int vfs_root(bhv_desc_t *, struct vnode **);
191extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *);
192extern int vfs_sync(bhv_desc_t *, int, struct cred *);
193extern int vfs_vget(bhv_desc_t *, struct vnode **, struct fid *);
194extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
195extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
196extern void vfs_init_vnode(bhv_desc_t *, struct vnode *, bhv_desc_t *, int);
197extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
198extern void vfs_freeze(bhv_desc_t *);
199
200typedef struct bhv_vfsops {
201 struct vfsops bhv_common;
202 void * bhv_custom;
203} bhv_vfsops_t;
204
205#define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) )
206#define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom )
207#define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o))
208#define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL )
209
210extern vfs_t *vfs_allocate(void);
211extern void vfs_deallocate(vfs_t *);
212extern void vfs_insertops(vfs_t *, bhv_vfsops_t *);
213extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *);
214
215extern void bhv_insert_all_vfsops(struct vfs *);
216extern void bhv_remove_all_vfsops(struct vfs *, int);
217extern void bhv_remove_vfsops(struct vfs *, int);
218
219#define fs_frozen(vfsp) ((vfsp)->vfs_super->s_frozen)
220#define fs_check_frozen(vfsp, level) \
221 vfs_check_frozen(vfsp->vfs_super, level);
222
223#endif /* __XFS_VFS_H__ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-17 04:05:47 -0500