/* * 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 #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__ */