xfs_mount.h

linux 内核源代码

/*
 * 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_MOUNT_H__
#define	__XFS_MOUNT_H__


typedef struct xfs_trans_reservations {
	uint	tr_write;	/* extent alloc trans */
	uint	tr_itruncate;	/* truncate trans */
	uint	tr_rename;	/* rename trans */
	uint	tr_link;	/* link trans */
	uint	tr_remove;	/* unlink trans */
	uint	tr_symlink;	/* symlink trans */
	uint	tr_create;	/* create trans */
	uint	tr_mkdir;	/* mkdir trans */
	uint	tr_ifree;	/* inode free trans */
	uint	tr_ichange;	/* inode update trans */
	uint	tr_growdata;	/* fs data section grow trans */
	uint	tr_swrite;	/* sync write inode trans */
	uint	tr_addafork;	/* cvt inode to attributed trans */
	uint	tr_writeid;	/* write setuid/setgid file */
	uint	tr_attrinval;	/* attr fork buffer invalidation */
	uint	tr_attrset;	/* set/create an attribute */
	uint	tr_attrrm;	/* remove an attribute */
	uint	tr_clearagi;	/* clear bad agi unlinked ino bucket */
	uint	tr_growrtalloc;	/* grow realtime allocations */
	uint	tr_growrtzero;	/* grow realtime zeroing */
	uint	tr_growrtfree;	/* grow realtime freeing */
} xfs_trans_reservations_t;

#ifndef __KERNEL__
/*
 * Moved here from xfs_ag.h to avoid reordering header files
 */
#define XFS_DADDR_TO_AGNO(mp,d) \
	((xfs_agnumber_t)(XFS_BB_TO_FSBT(mp, d) / (mp)->m_sb.sb_agblocks))
#define XFS_DADDR_TO_AGBNO(mp,d) \
	((xfs_agblock_t)(XFS_BB_TO_FSBT(mp, d) % (mp)->m_sb.sb_agblocks))
#else
struct cred;
struct log;
struct xfs_mount_args;
struct xfs_inode;
struct xfs_iocore;
struct xfs_bmbt_irec;
struct xfs_bmap_free;
struct xfs_extdelta;
struct xfs_swapext;
struct xfs_mru_cache;

#define	AIL_LOCK_T		lock_t
#define	AIL_LOCKINIT(x,y)	spinlock_init(x,y)
#define	AIL_LOCK_DESTROY(x)	spinlock_destroy(x)
#define	AIL_LOCK(mp,s)		s=mutex_spinlock(&(mp)->m_ail_lock)
#define	AIL_UNLOCK(mp,s)	mutex_spinunlock(&(mp)->m_ail_lock, s)


/*
 * Prototypes and functions for the Data Migration subsystem.
 */

typedef int	(*xfs_send_data_t)(int, bhv_vnode_t *,
			xfs_off_t, size_t, int, bhv_vrwlock_t *);
typedef int	(*xfs_send_mmap_t)(struct vm_area_struct *, uint);
typedef int	(*xfs_send_destroy_t)(bhv_vnode_t *, dm_right_t);
typedef int	(*xfs_send_namesp_t)(dm_eventtype_t, struct xfs_mount *,
			bhv_vnode_t *,
			dm_right_t, bhv_vnode_t *, dm_right_t,
			char *, char *, mode_t, int, int);
typedef int	(*xfs_send_mount_t)(struct xfs_mount *, dm_right_t,
			char *, char *);
typedef void	(*xfs_send_unmount_t)(struct xfs_mount *, bhv_vnode_t *,
			dm_right_t, mode_t, int, int);

typedef struct xfs_dmops {
	xfs_send_data_t		xfs_send_data;
	xfs_send_mmap_t		xfs_send_mmap;
	xfs_send_destroy_t	xfs_send_destroy;
	xfs_send_namesp_t	xfs_send_namesp;
	xfs_send_mount_t	xfs_send_mount;
	xfs_send_unmount_t	xfs_send_unmount;
} xfs_dmops_t;

#define XFS_SEND_DATA(mp, ev,vp,off,len,fl,lock) \
	(*(mp)->m_dm_ops->xfs_send_data)(ev,vp,off,len,fl,lock)
#define XFS_SEND_MMAP(mp, vma,fl) \
	(*(mp)->m_dm_ops->xfs_send_mmap)(vma,fl)
#define XFS_SEND_DESTROY(mp, vp,right) \
	(*(mp)->m_dm_ops->xfs_send_destroy)(vp,right)
#define XFS_SEND_NAMESP(mp, ev,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
	(*(mp)->m_dm_ops->xfs_send_namesp)(ev,NULL,b1,r1,b2,r2,n1,n2,mode,rval,fl)
#define XFS_SEND_PREUNMOUNT(mp,b1,r1,b2,r2,n1,n2,mode,rval,fl) \
	(*(mp)->m_dm_ops->xfs_send_namesp)(DM_EVENT_PREUNMOUNT,mp,b1,r1,b2,r2,n1,n2,mode,rval,fl)
#define XFS_SEND_MOUNT(mp,right,path,name) \
	(*(mp)->m_dm_ops->xfs_send_mount)(mp,right,path,name)
#define XFS_SEND_UNMOUNT(mp, vp,right,mode,rval,fl) \
	(*(mp)->m_dm_ops->xfs_send_unmount)(mp,vp,right,mode,rval,fl)


/*
 * Prototypes and functions for the Quota Management subsystem.
 */

struct xfs_dquot;
struct xfs_dqtrxops;
struct xfs_quotainfo;

typedef int	(*xfs_qminit_t)(struct xfs_mount *, uint *, uint *);
typedef int	(*xfs_qmmount_t)(struct xfs_mount *, uint, uint, int);
typedef int	(*xfs_qmunmount_t)(struct xfs_mount *);
typedef void	(*xfs_qmdone_t)(struct xfs_mount *);
typedef void	(*xfs_dqrele_t)(struct xfs_dquot *);
typedef int	(*xfs_dqattach_t)(struct xfs_inode *, uint);
typedef void	(*xfs_dqdetach_t)(struct xfs_inode *);
typedef int	(*xfs_dqpurgeall_t)(struct xfs_mount *, uint);
typedef int	(*xfs_dqvopalloc_t)(struct xfs_mount *,
			struct xfs_inode *, uid_t, gid_t, prid_t, uint,
			struct xfs_dquot **, struct xfs_dquot **);
typedef void	(*xfs_dqvopcreate_t)(struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot *, struct xfs_dquot *);
typedef int	(*xfs_dqvoprename_t)(struct xfs_inode **);
typedef struct xfs_dquot * (*xfs_dqvopchown_t)(
			struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot **, struct xfs_dquot *);
typedef int	(*xfs_dqvopchownresv_t)(struct xfs_trans *, struct xfs_inode *,
			struct xfs_dquot *, struct xfs_dquot *, uint);
typedef void	(*xfs_dqstatvfs_t)(struct xfs_inode *, bhv_statvfs_t *);
typedef int	(*xfs_dqsync_t)(struct xfs_mount *, int flags);
typedef int	(*xfs_quotactl_t)(struct xfs_mount *, int, int, xfs_caddr_t);

typedef struct xfs_qmops {
	xfs_qminit_t		xfs_qminit;
	xfs_qmdone_t		xfs_qmdone;
	xfs_qmmount_t		xfs_qmmount;
	xfs_qmunmount_t		xfs_qmunmount;
	xfs_dqrele_t		xfs_dqrele;
	xfs_dqattach_t		xfs_dqattach;
	xfs_dqdetach_t		xfs_dqdetach;
	xfs_dqpurgeall_t	xfs_dqpurgeall;
	xfs_dqvopalloc_t	xfs_dqvopalloc;
	xfs_dqvopcreate_t	xfs_dqvopcreate;
	xfs_dqvoprename_t	xfs_dqvoprename;
	xfs_dqvopchown_t	xfs_dqvopchown;
	xfs_dqvopchownresv_t	xfs_dqvopchownresv;
	xfs_dqstatvfs_t		xfs_dqstatvfs;
	xfs_dqsync_t		xfs_dqsync;
	xfs_quotactl_t		xfs_quotactl;
	struct xfs_dqtrxops	*xfs_dqtrxops;
} xfs_qmops_t;

#define XFS_QM_INIT(mp, mnt, fl) \
	(*(mp)->m_qm_ops->xfs_qminit)(mp, mnt, fl)
#define XFS_QM_MOUNT(mp, mnt, fl, mfsi_flags) \
	(*(mp)->m_qm_ops->xfs_qmmount)(mp, mnt, fl, mfsi_flags)
#define XFS_QM_UNMOUNT(mp) \
	(*(mp)->m_qm_ops->xfs_qmunmount)(mp)
#define XFS_QM_DONE(mp) \
	(*(mp)->m_qm_ops->xfs_qmdone)(mp)
#define XFS_QM_DQRELE(mp, dq) \
	(*(mp)->m_qm_ops->xfs_dqrele)(dq)
#define XFS_QM_DQATTACH(mp, ip, fl) \
	(*(mp)->m_qm_ops->xfs_dqattach)(ip, fl)
#define XFS_QM_DQDETACH(mp, ip) \
	(*(mp)->m_qm_ops->xfs_dqdetach)(ip)
#define XFS_QM_DQPURGEALL(mp, fl) \
	(*(mp)->m_qm_ops->xfs_dqpurgeall)(mp, fl)
#define XFS_QM_DQVOPALLOC(mp, ip, uid, gid, prid, fl, dq1, dq2) \
	(*(mp)->m_qm_ops->xfs_dqvopalloc)(mp, ip, uid, gid, prid, fl, dq1, dq2)
#define XFS_QM_DQVOPCREATE(mp, tp, ip, dq1, dq2) \
	(*(mp)->m_qm_ops->xfs_dqvopcreate)(tp, ip, dq1, dq2)
#define XFS_QM_DQVOPRENAME(mp, ip) \
	(*(mp)->m_qm_ops->xfs_dqvoprename)(ip)
#define XFS_QM_DQVOPCHOWN(mp, tp, ip, dqp, dq) \
	(*(mp)->m_qm_ops->xfs_dqvopchown)(tp, ip, dqp, dq)
#define XFS_QM_DQVOPCHOWNRESV(mp, tp, ip, dq1, dq2, fl) \
	(*(mp)->m_qm_ops->xfs_dqvopchownresv)(tp, ip, dq1, dq2, fl)
#define XFS_QM_DQSTATVFS(ip, statp) \
	(*(ip)->i_mount->m_qm_ops->xfs_dqstatvfs)(ip, statp)
#define XFS_QM_DQSYNC(mp, flags) \
	(*(mp)->m_qm_ops->xfs_dqsync)(mp, flags)
#define XFS_QM_QUOTACTL(mp, cmd, id, addr) \
	(*(mp)->m_qm_ops->xfs_quotactl)(mp, cmd, id, addr)


/*
 * Prototypes and functions for I/O core modularization.
 */

typedef int		(*xfs_ioinit_t)(struct xfs_mount *,
				struct xfs_mount_args *, int);
typedef int		(*xfs_bmapi_t)(struct xfs_trans *, void *,
				xfs_fileoff_t, xfs_filblks_t, int,
				xfs_fsblock_t *, xfs_extlen_t,
				struct xfs_bmbt_irec *, int *,
				struct xfs_bmap_free *, struct xfs_extdelta *);
typedef int		(*xfs_bunmapi_t)(struct xfs_trans *,
				void *, xfs_fileoff_t,
				xfs_filblks_t, int, xfs_extnum_t,
				xfs_fsblock_t *, struct xfs_bmap_free *,
				struct xfs_extdelta *, int *);
typedef int		(*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);
typedef int		(*xfs_iomap_write_direct_t)(
				void *, xfs_off_t, size_t, int,
				struct xfs_bmbt_irec *, int *, int);
typedef int		(*xfs_iomap_write_delay_t)(
				void *, xfs_off_t, size_t, int,
				struct xfs_bmbt_irec *, int *);
typedef int		(*xfs_iomap_write_allocate_t)(
				void *, xfs_off_t, size_t,
				struct xfs_bmbt_irec *, int *);
typedef int		(*xfs_iomap_write_unwritten_t)(
				void *, xfs_off_t, size_t);
typedef uint		(*xfs_lck_map_shared_t)(void *);
typedef void		(*xfs_lock_t)(void *, uint);
typedef void		(*xfs_lock_demote_t)(void *, uint);
typedef int		(*xfs_lock_nowait_t)(void *, uint);
typedef void		(*xfs_unlk_t)(void *, unsigned int);
typedef xfs_fsize_t	(*xfs_size_t)(void *);
typedef xfs_fsize_t	(*xfs_iodone_t)(struct xfs_mount *);
typedef int		(*xfs_swap_extents_t)(void *, void *,
				struct xfs_swapext*);

typedef struct xfs_ioops {
	xfs_ioinit_t			xfs_ioinit;
	xfs_bmapi_t			xfs_bmapi_func;
	xfs_bunmapi_t			xfs_bunmapi_func;
	xfs_bmap_eof_t			xfs_bmap_eof_func;
	xfs_iomap_write_direct_t	xfs_iomap_write_direct;
	xfs_iomap_write_delay_t		xfs_iomap_write_delay;
	xfs_iomap_write_allocate_t	xfs_iomap_write_allocate;
	xfs_iomap_write_unwritten_t	xfs_iomap_write_unwritten;
	xfs_lock_t			xfs_ilock;
	xfs_lck_map_shared_t		xfs_lck_map_shared;
	xfs_lock_demote_t		xfs_ilock_demote;
	xfs_lock_nowait_t		xfs_ilock_nowait;
	xfs_unlk_t			xfs_unlock;
	xfs_size_t			xfs_size_func;
	xfs_iodone_t			xfs_iodone;
	xfs_swap_extents_t		xfs_swap_extents_func;
} xfs_ioops_t;

#define XFS_IOINIT(mp, args, flags) \
	(*(mp)->m_io_ops.xfs_ioinit)(mp, args, flags)
#define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist,delta) \
	(*(mp)->m_io_ops.xfs_bmapi_func) \
		(trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist,delta)
#define XFS_BUNMAPI(mp, trans,io,bno,len,f,nexts,first,flist,delta,done) \
	(*(mp)->m_io_ops.xfs_bunmapi_func) \
		(trans,(io)->io_obj,bno,len,f,nexts,first,flist,delta,done)
#define XFS_BMAP_EOF(mp, io, endoff, whichfork, eof) \
	(*(mp)->m_io_ops.xfs_bmap_eof_func) \
		((io)->io_obj, endoff, whichfork, eof)
#define XFS_IOMAP_WRITE_DIRECT(mp, io, offset, count, flags, mval, nmap, found)\
	(*(mp)->m_io_ops.xfs_iomap_write_direct) \
		((io)->io_obj, offset, count, flags, mval, nmap, found)
#define XFS_IOMAP_WRITE_DELAY(mp, io, offset, count, flags, mval, nmap) \
	(*(mp)->m_io_ops.xfs_iomap_write_delay) \
		((io)->io_obj, offset, count, flags, mval, nmap)
#define XFS_IOMAP_WRITE_ALLOCATE(mp, io, offset, count, mval, nmap) \
	(*(mp)->m_io_ops.xfs_iomap_write_allocate) \
		((io)->io_obj, offset, count, mval, nmap)
#define XFS_IOMAP_WRITE_UNWRITTEN(mp, io, offset, count) \
	(*(mp)->m_io_ops.xfs_iomap_write_unwritten) \
		((io)->io_obj, offset, count)
#define XFS_LCK_MAP_SHARED(mp, io) \
	(*(mp)->m_io_ops.xfs_lck_map_shared)((io)->io_obj)
#define XFS_ILOCK(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock)((io)->io_obj, mode)
#define XFS_ILOCK_NOWAIT(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock_nowait)((io)->io_obj, mode)
#define XFS_IUNLOCK(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_unlock)((io)->io_obj, mode)
#define XFS_ILOCK_DEMOTE(mp, io, mode) \
	(*(mp)->m_io_ops.xfs_ilock_demote)((io)->io_obj, mode)
#define XFS_SIZE(mp, io) \
	(*(mp)->m_io_ops.xfs_size_func)((io)->io_obj)
#define XFS_IODONE(mp) \
	(*(mp)->m_io_ops.xfs_iodone)(mp)
#define XFS_SWAP_EXTENTS(mp, io, tio, sxp) \
	(*(mp)->m_io_ops.xfs_swap_extents_func) \
		((io)->io_obj, (tio)->io_obj, sxp)

#ifdef HAVE_PERCPU_SB

/*
 * Valid per-cpu incore superblock counters. Note that if you add new counters,
 * you may need to define new counter disabled bit field descriptors as there
 * are more possible fields in the superblock that can fit in a bitfield on a
 * 32 bit platform. The XFS_SBS_* values for the current current counters just
 * fit.
 */
typedef struct xfs_icsb_cnts {
	uint64_t	icsb_fdblocks;
	uint64_t	icsb_ifree;
	uint64_t	icsb_icount;
	unsigned long	icsb_flags;
} xfs_icsb_cnts_t;

#define XFS_ICSB_FLAG_LOCK	(1 << 0)	/* counter lock bit */

#define XFS_ICSB_SB_LOCKED	(1 << 0)	/* sb already locked */
#define XFS_ICSB_LAZY_COUNT	(1 << 1)	/* accuracy not needed */

extern int	xfs_icsb_init_counters(struct xfs_mount *);
extern void	xfs_icsb_reinit_counters(struct xfs_mount *);
extern void	xfs_icsb_sync_counters_flags(struct xfs_mount *, int);

#else
#define xfs_icsb_init_counters(mp)	(0)
#define xfs_icsb_reinit_counters(mp)	do { } while (0)
#define xfs_icsb_sync_counters_flags(mp, flags)	do { } while (0)
#endif

typedef struct xfs_mount {