diff options
Diffstat (limited to 'fs/xfs/linux-2.6/xfs_vfs.h')
| -rw-r--r-- | fs/xfs/linux-2.6/xfs_vfs.h | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/fs/xfs/linux-2.6/xfs_vfs.h b/fs/xfs/linux-2.6/xfs_vfs.h new file mode 100644 index 000000000000..76493991578f --- /dev/null +++ b/fs/xfs/linux-2.6/xfs_vfs.h @@ -0,0 +1,223 @@ +/* + * Copyright (c) 2000-2004 Silicon Graphics, Inc. All Rights Reserved. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it would be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + * + * Further, this software is distributed without any warranty that it is + * free of the rightful claim of any third person regarding infringement + * or the like. Any license provided herein, whether implied or + * otherwise, applies only to this software file. Patent licenses, if + * any, provided herein do not apply to combinations of this program with + * other software, or any other product whatsoever. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston MA 02111-1307, USA. + * + * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, + * Mountain View, CA 94043, or: + * + * http://www.sgi.com + * + * For further information regarding this notice, see: + * + * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ + */ +#ifndef __XFS_VFS_H__ +#define __XFS_VFS_H__ + +#include <linux/vfs.h> +#include "xfs_fs.h" + +struct fid; +struct vfs; +struct cred; +struct vnode; +struct kstatfs; +struct seq_file; +struct super_block; +struct xfs_mount_args; + +typedef struct kstatfs xfs_statfs_t; + +typedef struct vfs_sync_work { + struct list_head w_list; + struct vfs *w_vfs; + void *w_data; /* syncer routine argument */ + void (*w_syncer)(struct vfs *, void *); +} vfs_sync_work_t; + +typedef struct vfs { + u_int vfs_flag; /* flags */ + xfs_fsid_t vfs_fsid; /* file system ID */ + xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */ + bhv_head_t vfs_bh; /* head of vfs behavior chain */ + struct super_block *vfs_super; /* generic superblock pointer */ + struct task_struct *vfs_sync_task; /* generalised sync thread */ + vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */ + struct list_head vfs_sync_list; /* sync thread work item list */ + spinlock_t vfs_sync_lock; /* work item list lock */ + int vfs_sync_seq; /* sync thread generation no. */ + wait_queue_head_t vfs_wait_single_sync_task; + wait_queue_head_t vfs_wait_sync_task; +} vfs_t; + +#define vfs_fbhv vfs_bh.bh_first /* 1st on vfs behavior chain */ + +#define bhvtovfs(bdp) ( (struct vfs *)BHV_VOBJ(bdp) ) +#define bhvtovfsops(bdp) ( (struct vfsops *)BHV_OPS(bdp) ) +#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh ) +#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) ) + +#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */ +#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */ +#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */ + +typedef enum { + VFS_BHV_UNKNOWN, /* not specified */ + VFS_BHV_XFS, /* xfs */ + VFS_BHV_DM, /* data migration */ + VFS_BHV_QM, /* quota manager */ + VFS_BHV_IO, /* IO path */ + VFS_BHV_END /* housekeeping end-of-range */ +} vfs_bhv_t; + +#define VFS_POSITION_XFS (BHV_POSITION_BASE) +#define VFS_POSITION_DM (VFS_POSITION_BASE+10) +#define VFS_POSITION_QM (VFS_POSITION_BASE+20) +#define VFS_POSITION_IO (VFS_POSITION_BASE+30) + +#define VFS_RDONLY 0x0001 /* read-only vfs */ +#define VFS_GRPID 0x0002 /* group-ID assigned from directory */ +#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */ +#define VFS_UMOUNT 0x0008 /* unmount in progress */ +#define VFS_END 0x0008 /* max flag */ + +#define SYNC_ATTR 0x0001 /* sync attributes */ +#define SYNC_CLOSE 0x0002 /* close file system down */ +#define SYNC_DELWRI 0x0004 /* look at delayed writes */ +#define SYNC_WAIT 0x0008 /* wait for i/o to complete */ +#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */ +#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */ +#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */ +#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */ + +typedef int (*vfs_mount_t)(bhv_desc_t *, + struct xfs_mount_args *, struct cred *); +typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *, + struct xfs_mount_args *, int); +typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *); +typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *); +typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *, + struct xfs_mount_args *); +typedef int (*vfs_root_t)(bhv_desc_t *, struct vnode **); +typedef int (*vfs_statvfs_t)(bhv_desc_t *, xfs_statfs_t *, struct vnode *); +typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *); +typedef int (*vfs_vget_t)(bhv_desc_t *, struct vnode **, struct fid *); +typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t); +typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t); +typedef void (*vfs_init_vnode_t)(bhv_desc_t *, + struct vnode *, bhv_desc_t *, int); +typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int); +typedef void (*vfs_freeze_t)(bhv_desc_t *); + +typedef struct vfsops { + bhv_position_t vf_position; /* behavior chain position */ + vfs_mount_t vfs_mount; /* mount file system */ + vfs_parseargs_t vfs_parseargs; /* parse mount options */ + vfs_showargs_t vfs_showargs; /* unparse mount options */ + vfs_unmount_t vfs_unmount; /* unmount file system */ + vfs_mntupdate_t vfs_mntupdate; /* update file system options */ + vfs_root_t vfs_root; /* get root vnode */ + vfs_statvfs_t vfs_statvfs; /* file system statistics */ + vfs_sync_t vfs_sync; /* flush files */ + vfs_vget_t vfs_vget; /* get vnode from fid */ + vfs_dmapiops_t vfs_dmapiops; /* data migration */ + vfs_quotactl_t vfs_quotactl; /* disk quota */ + vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */ + vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */ + vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */ +} vfsops_t; + +/* + * VFS's. Operates on vfs structure pointers (starts at bhv head). + */ +#define VHEAD(v) ((v)->vfs_fbhv) +#define VFS_MOUNT(v, ma,cr, rv) ((rv) = vfs_mount(VHEAD(v), ma,cr)) +#define VFS_PARSEARGS(v, o,ma,f, rv) ((rv) = vfs_parseargs(VHEAD(v), o,ma,f)) +#define VFS_SHOWARGS(v, m, rv) ((rv) = vfs_showargs(VHEAD(v), m)) +#define VFS_UNMOUNT(v, f, cr, rv) ((rv) = vfs_unmount(VHEAD(v), f,cr)) +#define VFS_MNTUPDATE(v, fl, args, rv) ((rv) = vfs_mntupdate(VHEAD(v), fl, args)) +#define VFS_ROOT(v, vpp, rv) ((rv) = vfs_root(VHEAD(v), vpp)) +#define VFS_STATVFS(v, sp,vp, rv) ((rv) = vfs_statvfs(VHEAD(v), sp,vp)) +#define VFS_SYNC(v, flag,cr, rv) ((rv) = vfs_sync(VHEAD(v), flag,cr)) +#define VFS_VGET(v, vpp,fidp, rv) ((rv) = vfs_vget(VHEAD(v), vpp,fidp)) +#define VFS_DMAPIOPS(v, p, rv) ((rv) = vfs_dmapiops(VHEAD(v), p)) +#define VFS_QUOTACTL(v, c,id,p, rv) ((rv) = vfs_quotactl(VHEAD(v), c,id,p)) +#define VFS_INIT_VNODE(v, vp,b,ul) ( vfs_init_vnode(VHEAD(v), vp,b,ul) ) +#define VFS_FORCE_SHUTDOWN(v, fl,f,l) ( vfs_force_shutdown(VHEAD(v), fl,f,l) ) +#define VFS_FREEZE(v) ( vfs_freeze(VHEAD(v)) ) + +/* + * PVFS's. Operates on behavior descriptor pointers. + */ +#define PVFS_MOUNT(b, ma,cr, rv) ((rv) = vfs_mount(b, ma,cr)) +#define PVFS_PARSEARGS(b, o,ma,f, rv) ((rv) = vfs_parseargs(b, o,ma,f)) +#define PVFS_SHOWARGS(b, m, rv) ((rv) = vfs_showargs(b, m)) +#define PVFS_UNMOUNT(b, f,cr, rv) ((rv) = vfs_unmount(b, f,cr)) +#define PVFS_MNTUPDATE(b, fl, args, rv) ((rv) = vfs_mntupdate(b, fl, args)) +#define PVFS_ROOT(b, vpp, rv) ((rv) = vfs_root(b, vpp)) +#define PVFS_STATVFS(b, sp,vp, rv) ((rv) = vfs_statvfs(b, sp,vp)) +#define PVFS_SYNC(b, flag,cr, rv) ((rv) = vfs_sync(b, flag,cr)) +#define PVFS_VGET(b, vpp,fidp, rv) ((rv) = vfs_vget(b, vpp,fidp)) +#define PVFS_DMAPIOPS(b, p, rv) ((rv) = vfs_dmapiops(b, p)) +#define PVFS_QUOTACTL(b, c,id,p, rv) ((rv) = vfs_quotactl(b, c,id,p)) +#define PVFS_INIT_VNODE(b, vp,b2,ul) ( vfs_init_vnode(b, vp,b2,ul) ) +#define PVFS_FORCE_SHUTDOWN(b, fl,f,l) ( vfs_force_shutdown(b, fl,f,l) ) +#define PVFS_FREEZE(b) ( vfs_freeze(b) ) + +extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *); +extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int); +extern int vfs_showargs(bhv_desc_t *, struct seq_file *); +extern int vfs_unmount(bhv_desc_t *, int, struct cred *); +extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *); +extern int vfs_root(bhv_desc_t *, struct vnode **); +extern int vfs_statvfs(bhv_desc_t *, xfs_statfs_t *, struct vnode *); +extern int vfs_sync(bhv_desc_t *, int, struct cred *); +extern int vfs_vget(bhv_desc_t *, struct vnode **, struct fid *); +extern int vfs_dmapiops(bhv_desc_t *, caddr_t); +extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t); +extern void vfs_init_vnode(bhv_desc_t *, struct vnode *, bhv_desc_t *, int); +extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int); +extern void vfs_freeze(bhv_desc_t *); + +typedef struct bhv_vfsops { + struct vfsops bhv_common; + void * bhv_custom; +} bhv_vfsops_t; + +#define vfs_bhv_lookup(v, id) ( bhv_lookup_range(&(v)->vfs_bh, (id), (id)) ) +#define vfs_bhv_custom(b) ( ((bhv_vfsops_t *)BHV_OPS(b))->bhv_custom ) +#define vfs_bhv_set_custom(b,o) ( (b)->bhv_custom = (void *)(o)) +#define vfs_bhv_clr_custom(b) ( (b)->bhv_custom = NULL ) + +extern vfs_t *vfs_allocate(void); +extern void vfs_deallocate(vfs_t *); +extern void vfs_insertops(vfs_t *, bhv_vfsops_t *); +extern void vfs_insertbhv(vfs_t *, bhv_desc_t *, vfsops_t *, void *); + +extern void bhv_insert_all_vfsops(struct vfs *); +extern void bhv_remove_all_vfsops(struct vfs *, int); +extern void bhv_remove_vfsops(struct vfs *, int); + +#define fs_frozen(vfsp) ((vfsp)->vfs_super->s_frozen) +#define fs_check_frozen(vfsp, level) \ + vfs_check_frozen(vfsp->vfs_super, level); + +#endif /* __XFS_VFS_H__ */ |