| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms 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. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #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; |
| } 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_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 */ |
| #define SYNC_QUIESCE 0x0100 /* quiesce fileystem for a snapshot */ |
| |
| 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__ */ |
