739bfb2a7d
SGI-PV: 969608 SGI-Modid: xfs-linux-melb:xfs-kern:29493a Signed-off-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: David Chinner <dgc@sgi.com> Signed-off-by: Tim Shimmin <tes@sgi.com>
233 lines
10 KiB
C
233 lines
10 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_VFS_H__
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#define __XFS_VFS_H__
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#include <linux/vfs.h>
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#include "xfs_fs.h"
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struct bhv_vfs;
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struct bhv_vnode;
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struct fid;
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struct cred;
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struct seq_file;
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struct super_block;
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struct xfs_inode;
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struct xfs_mount_args;
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typedef struct kstatfs bhv_statvfs_t;
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typedef struct bhv_vfs_sync_work {
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struct list_head w_list;
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struct bhv_vfs *w_vfs;
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void *w_data; /* syncer routine argument */
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void (*w_syncer)(struct bhv_vfs *, void *);
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} bhv_vfs_sync_work_t;
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typedef struct bhv_vfs {
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u_int vfs_flag; /* flags */
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xfs_fsid_t vfs_fsid; /* file system ID */
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xfs_fsid_t *vfs_altfsid; /* An ID fixed for life of FS */
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bhv_head_t vfs_bh; /* head of vfs behavior chain */
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struct super_block *vfs_super; /* generic superblock pointer */
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struct task_struct *vfs_sync_task; /* generalised sync thread */
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bhv_vfs_sync_work_t vfs_sync_work; /* work item for VFS_SYNC */
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struct list_head vfs_sync_list; /* sync thread work item list */
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spinlock_t vfs_sync_lock; /* work item list lock */
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int vfs_sync_seq; /* sync thread generation no. */
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wait_queue_head_t vfs_wait_single_sync_task;
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} bhv_vfs_t;
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#define bhvtovfs(bdp) ( (struct bhv_vfs *)BHV_VOBJ(bdp) )
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#define bhvtovfsops(bdp) ( (struct bhv_vfsops *)BHV_OPS(bdp) )
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#define VFS_BHVHEAD(vfs) ( &(vfs)->vfs_bh )
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#define VFS_REMOVEBHV(vfs, bdp) ( bhv_remove(VFS_BHVHEAD(vfs), bdp) )
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#define VFS_POSITION_BASE BHV_POSITION_BASE /* chain bottom */
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#define VFS_POSITION_TOP BHV_POSITION_TOP /* chain top */
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#define VFS_POSITION_INVALID BHV_POSITION_INVALID /* invalid pos. num */
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typedef enum {
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VFS_BHV_UNKNOWN, /* not specified */
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VFS_BHV_XFS, /* xfs */
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VFS_BHV_DM, /* data migration */
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VFS_BHV_QM, /* quota manager */
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VFS_BHV_IO, /* IO path */
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VFS_BHV_END /* housekeeping end-of-range */
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} bhv_vfs_type_t;
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#define VFS_POSITION_XFS (BHV_POSITION_BASE)
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#define VFS_POSITION_DM (VFS_POSITION_BASE+10)
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#define VFS_POSITION_QM (VFS_POSITION_BASE+20)
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#define VFS_POSITION_IO (VFS_POSITION_BASE+30)
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#define VFS_RDONLY 0x0001 /* read-only vfs */
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#define VFS_GRPID 0x0002 /* group-ID assigned from directory */
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#define VFS_DMI 0x0004 /* filesystem has the DMI enabled */
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/* ---- VFS_UMOUNT ---- 0x0008 -- unneeded, fixed via kthread APIs */
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#define VFS_32BITINODES 0x0010 /* do not use inums above 32 bits */
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#define VFS_END 0x0010 /* max flag */
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#define SYNC_ATTR 0x0001 /* sync attributes */
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#define SYNC_CLOSE 0x0002 /* close file system down */
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#define SYNC_DELWRI 0x0004 /* look at delayed writes */
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#define SYNC_WAIT 0x0008 /* wait for i/o to complete */
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#define SYNC_BDFLUSH 0x0010 /* BDFLUSH is calling -- don't block */
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#define SYNC_FSDATA 0x0020 /* flush fs data (e.g. superblocks) */
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#define SYNC_REFCACHE 0x0040 /* prune some of the nfs ref cache */
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#define SYNC_REMOUNT 0x0080 /* remount readonly, no dummy LRs */
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#define SYNC_IOWAIT 0x0100 /* wait for all I/O to complete */
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#define SYNC_SUPER 0x0200 /* flush superblock to disk */
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/*
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* When remounting a filesystem read-only or freezing the filesystem,
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* we have two phases to execute. This first phase is syncing the data
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* before we quiesce the fielsystem, and the second is flushing all the
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* inodes out after we've waited for all the transactions created by
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* the first phase to complete. The second phase uses SYNC_INODE_QUIESCE
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* to ensure that the inodes are written to their location on disk
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* rather than just existing in transactions in the log. This means
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* after a quiesce there is no log replay required to write the inodes
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* to disk (this is the main difference between a sync and a quiesce).
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*/
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#define SYNC_DATA_QUIESCE (SYNC_DELWRI|SYNC_FSDATA|SYNC_WAIT|SYNC_IOWAIT)
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#define SYNC_INODE_QUIESCE (SYNC_REMOUNT|SYNC_ATTR|SYNC_WAIT)
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#define SHUTDOWN_META_IO_ERROR 0x0001 /* write attempt to metadata failed */
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#define SHUTDOWN_LOG_IO_ERROR 0x0002 /* write attempt to the log failed */
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#define SHUTDOWN_FORCE_UMOUNT 0x0004 /* shutdown from a forced unmount */
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#define SHUTDOWN_CORRUPT_INCORE 0x0008 /* corrupt in-memory data structures */
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#define SHUTDOWN_REMOTE_REQ 0x0010 /* shutdown came from remote cell */
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#define SHUTDOWN_DEVICE_REQ 0x0020 /* failed all paths to the device */
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typedef int (*vfs_mount_t)(bhv_desc_t *,
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struct xfs_mount_args *, struct cred *);
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typedef int (*vfs_parseargs_t)(bhv_desc_t *, char *,
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struct xfs_mount_args *, int);
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typedef int (*vfs_showargs_t)(bhv_desc_t *, struct seq_file *);
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typedef int (*vfs_unmount_t)(bhv_desc_t *, int, struct cred *);
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typedef int (*vfs_mntupdate_t)(bhv_desc_t *, int *,
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struct xfs_mount_args *);
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typedef int (*vfs_root_t)(bhv_desc_t *, struct bhv_vnode **);
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typedef int (*vfs_statvfs_t)(bhv_desc_t *, bhv_statvfs_t *,
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struct bhv_vnode *);
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typedef int (*vfs_sync_t)(bhv_desc_t *, int, struct cred *);
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typedef int (*vfs_vget_t)(bhv_desc_t *, struct bhv_vnode **, struct fid *);
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typedef int (*vfs_dmapiops_t)(bhv_desc_t *, caddr_t);
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typedef int (*vfs_quotactl_t)(bhv_desc_t *, int, int, caddr_t);
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typedef void (*vfs_init_vnode_t)(bhv_desc_t *,
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struct bhv_vnode *, struct xfs_inode *, int);
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typedef void (*vfs_force_shutdown_t)(bhv_desc_t *, int, char *, int);
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typedef void (*vfs_freeze_t)(bhv_desc_t *);
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typedef struct bhv_vfsops {
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bhv_position_t vf_position; /* behavior chain position */
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vfs_mount_t vfs_mount; /* mount file system */
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vfs_parseargs_t vfs_parseargs; /* parse mount options */
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vfs_showargs_t vfs_showargs; /* unparse mount options */
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vfs_unmount_t vfs_unmount; /* unmount file system */
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vfs_mntupdate_t vfs_mntupdate; /* update file system options */
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vfs_root_t vfs_root; /* get root vnode */
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vfs_statvfs_t vfs_statvfs; /* file system statistics */
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vfs_sync_t vfs_sync; /* flush files */
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vfs_vget_t vfs_vget; /* get vnode from fid */
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vfs_dmapiops_t vfs_dmapiops; /* data migration */
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vfs_quotactl_t vfs_quotactl; /* disk quota */
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vfs_init_vnode_t vfs_init_vnode; /* initialize a new vnode */
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vfs_force_shutdown_t vfs_force_shutdown; /* crash and burn */
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vfs_freeze_t vfs_freeze; /* freeze fs for snapshot */
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} bhv_vfsops_t;
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/*
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* Virtual filesystem operations, operating from head bhv.
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*/
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#define VFSHEAD(v) ((v)->vfs_bh.bh_first)
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#define bhv_vfs_mount(v, ma,cr) vfs_mount(VFSHEAD(v), ma,cr)
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#define bhv_vfs_parseargs(v, o,ma,f) vfs_parseargs(VFSHEAD(v), o,ma,f)
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#define bhv_vfs_showargs(v, m) vfs_showargs(VFSHEAD(v), m)
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#define bhv_vfs_unmount(v, f,cr) vfs_unmount(VFSHEAD(v), f,cr)
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#define bhv_vfs_mntupdate(v, fl,args) vfs_mntupdate(VFSHEAD(v), fl,args)
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#define bhv_vfs_root(v, vpp) vfs_root(VFSHEAD(v), vpp)
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#define bhv_vfs_statvfs(v, sp,vp) vfs_statvfs(VFSHEAD(v), sp,vp)
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#define bhv_vfs_sync(v, flag,cr) vfs_sync(VFSHEAD(v), flag,cr)
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#define bhv_vfs_vget(v, vpp,fidp) vfs_vget(VFSHEAD(v), vpp,fidp)
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#define bhv_vfs_dmapiops(v, p) vfs_dmapiops(VFSHEAD(v), p)
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#define bhv_vfs_quotactl(v, c,id,p) vfs_quotactl(VFSHEAD(v), c,id,p)
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#define bhv_vfs_init_vnode(v, vp,b,ul) vfs_init_vnode(VFSHEAD(v), vp,b,ul)
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#define bhv_vfs_force_shutdown(v,u,f,l) vfs_force_shutdown(VFSHEAD(v), u,f,l)
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#define bhv_vfs_freeze(v) vfs_freeze(VFSHEAD(v))
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/*
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* Virtual filesystem operations, operating from next bhv.
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*/
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#define bhv_next_vfs_mount(b, ma,cr) vfs_mount(b, ma,cr)
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#define bhv_next_vfs_parseargs(b, o,ma,f) vfs_parseargs(b, o,ma,f)
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#define bhv_next_vfs_showargs(b, m) vfs_showargs(b, m)
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#define bhv_next_vfs_unmount(b, f,cr) vfs_unmount(b, f,cr)
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#define bhv_next_vfs_mntupdate(b, fl,args) vfs_mntupdate(b, fl, args)
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#define bhv_next_vfs_root(b, vpp) vfs_root(b, vpp)
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#define bhv_next_vfs_statvfs(b, sp,vp) vfs_statvfs(b, sp,vp)
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#define bhv_next_vfs_sync(b, flag,cr) vfs_sync(b, flag,cr)
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#define bhv_next_vfs_vget(b, vpp,fidp) vfs_vget(b, vpp,fidp)
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#define bhv_next_vfs_dmapiops(b, p) vfs_dmapiops(b, p)
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#define bhv_next_vfs_quotactl(b, c,id,p) vfs_quotactl(b, c,id,p)
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#define bhv_next_vfs_init_vnode(b, vp,b2,ul) vfs_init_vnode(b, vp,b2,ul)
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#define bhv_next_force_shutdown(b, fl,f,l) vfs_force_shutdown(b, fl,f,l)
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#define bhv_next_vfs_freeze(b) vfs_freeze(b)
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extern int vfs_mount(bhv_desc_t *, struct xfs_mount_args *, struct cred *);
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extern int vfs_parseargs(bhv_desc_t *, char *, struct xfs_mount_args *, int);
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extern int vfs_showargs(bhv_desc_t *, struct seq_file *);
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extern int vfs_unmount(bhv_desc_t *, int, struct cred *);
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extern int vfs_mntupdate(bhv_desc_t *, int *, struct xfs_mount_args *);
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extern int vfs_root(bhv_desc_t *, struct bhv_vnode **);
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extern int vfs_statvfs(bhv_desc_t *, bhv_statvfs_t *, struct bhv_vnode *);
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extern int vfs_sync(bhv_desc_t *, int, struct cred *);
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extern int vfs_vget(bhv_desc_t *, struct bhv_vnode **, struct fid *);
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extern int vfs_dmapiops(bhv_desc_t *, caddr_t);
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extern int vfs_quotactl(bhv_desc_t *, int, int, caddr_t);
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extern void vfs_init_vnode(bhv_desc_t *, struct bhv_vnode *, struct xfs_inode *, int);
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extern void vfs_force_shutdown(bhv_desc_t *, int, char *, int);
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extern void vfs_freeze(bhv_desc_t *);
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#define vfs_test_for_freeze(vfs) ((vfs)->vfs_super->s_frozen)
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#define vfs_wait_for_freeze(vfs,l) vfs_check_frozen((vfs)->vfs_super, (l))
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typedef struct bhv_module_vfsops {
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struct bhv_vfsops bhv_common;
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void * bhv_custom;
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} bhv_module_vfsops_t;
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#define vfs_bhv_lookup(v, id) (bhv_lookup_range(&(v)->vfs_bh, (id), (id)))
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#define vfs_bhv_custom(b) (((bhv_module_vfsops_t*)BHV_OPS(b))->bhv_custom)
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#define vfs_bhv_set_custom(b,o) ((b)->bhv_custom = (void *)(o))
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#define vfs_bhv_clr_custom(b) ((b)->bhv_custom = NULL)
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extern bhv_vfs_t *vfs_allocate(struct super_block *);
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extern bhv_vfs_t *vfs_from_sb(struct super_block *);
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extern void vfs_deallocate(bhv_vfs_t *);
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extern void vfs_insertbhv(bhv_vfs_t *, bhv_desc_t *, bhv_vfsops_t *, void *);
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extern void vfs_insertops(bhv_vfs_t *, bhv_module_vfsops_t *);
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extern void bhv_insert_all_vfsops(struct bhv_vfs *);
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extern void bhv_remove_all_vfsops(struct bhv_vfs *, int);
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extern void bhv_remove_vfsops(struct bhv_vfs *, int);
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#endif /* __XFS_VFS_H__ */
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