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/*

 * Copyright (c) 2000-2003 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_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 vfs;

struct vnode;

struct xfs_mount_args;

struct xfs_ihash;

struct xfs_chash;

struct xfs_inode;

struct xfs_perag;

struct xfs_iocore;

struct xfs_bmbt_irec;

struct xfs_bmap_free;

#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, struct vnode *,

                        xfs_off_t, size_t, int, vrwlock_t *);

typedef int     (*xfs_send_mmap_t)(struct vm_area_struct *, uint);

typedef int     (*xfs_send_destroy_t)(struct vnode *, dm_right_t);

typedef int     (*xfs_send_namesp_t)(dm_eventtype_t, struct vnode *,

                        dm_right_t, struct vnode *, dm_right_t,

                        char *, char *, mode_t, int, int);

typedef void    (*xfs_send_unmount_t)(struct vfs *, struct vnode *,

                        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_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,b1,r1,b2,r2,n1,n2,mode,rval,fl)

#define XFS_SEND_UNMOUNT(mp, vfsp,vp,right,mode,rval,fl) \

        (*(mp)->m_dm_ops.xfs_send_unmount)(vfsp,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);

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, 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 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;

        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) \

        (*(mp)->m_qm_ops.xfs_qmmount)(mp, mnt, fl)

#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, fl, dq1, dq2) \

        (*(mp)->m_qm_ops.xfs_dqvopalloc)(mp, ip, uid, gid, 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)

/*

 * Prototypes and functions for I/O core modularization.

 */

typedef int             (*xfs_ioinit_t)(struct vfs *,

                                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 *);

typedef int             (*xfs_bmap_eof_t)(void *, xfs_fileoff_t, int, int *);

typedef int             (*xfs_iomap_write_direct_t)(

                                void *, loff_t, size_t, int,

                                struct xfs_bmbt_irec *, int *, int);

typedef int             (*xfs_iomap_write_delay_t)(

                                void *, loff_t, size_t, int,

                                struct xfs_bmbt_irec *, int *);

typedef int             (*xfs_iomap_write_allocate_t)(

                                void *, struct xfs_bmbt_irec *, int *);

typedef int             (*xfs_iomap_write_unwritten_t)(

                                void *, loff_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 vfs *);

typedef struct xfs_ioops {

        xfs_ioinit_t                    xfs_ioinit;

        xfs_bmapi_t                     xfs_bmapi_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_ioops_t;

#define XFS_IOINIT(vfsp, args, flags) \

        (*(mp)->m_io_ops.xfs_ioinit)(vfsp, args, flags)

#define XFS_BMAPI(mp, trans,io,bno,len,f,first,tot,mval,nmap,flist)     \

        (*(mp)->m_io_ops.xfs_bmapi_func) \

                (trans,(io)->io_obj,bno,len,f,first,tot,mval,nmap,flist)

#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, mval, nmap) \

        (*(mp)->m_io_ops.xfs_iomap_write_allocate) \

                ((io)->io_obj, 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(vfsp) \

        (*(mp)->m_io_ops.xfs_iodone)(vfsp)

typedef struct xfs_mount {

        bhv_desc_t              m_bhv;          /* vfs xfs behavior */

        xfs_tid_t               m_tid;          /* next unused tid for fs */

        AIL_LOCK_T              m_ail_lock;     /* fs AIL mutex */

        xfs_ail_entry_t         m_ail;          /* fs active log item list */

        uint                    m_ail_gen;      /* fs AIL generation count */

        xfs_sb_t                m_sb;           /* copy of fs superblock */

        lock_t                  m_sb_lock;      /* sb counter mutex */

        struct xfs_buf          *m_sb_bp;       /* buffer for superblock */

        char                    *m_fsname;      /* filesystem name */

        int                     m_fsname_len;   /* strlen of fs name */

        int                     m_bsize;        /* fs logical block size */

        xfs_agnumber_t          m_agfrotor;     /* last ag where space found */

        xfs_agnumber_t          m_agirotor;     /* last ag dir inode alloced */

        lock_t                  m_agirotor_lock;/* .. and lock protecting it */

        xfs_agnumber_t          m_maxagi;       /* highest inode alloc group */

        int                     m_ihsize;       /* size of next field */

        struct xfs_ihash        *m_ihash;       /* fs private inode hash table*/

        struct xfs_inode        *m_inodes;      /* active inode list */

        struct list_head        m_del_inodes;   /* inodes to reclaim */

        mutex_t                 m_ilock;        /* inode list mutex */

        uint                    m_ireclaims;    /* count of calls to reclaim*/

        uint                    m_readio_log;   /* min read size log bytes */

        uint                    m_readio_blocks; /* min read size blocks */

        uint                    m_writeio_log;  /* min write size log bytes */

        uint                    m_writeio_blocks; /* min write size blocks */

        struct log              *m_log;         /* log specific stuff */

        int                     m_logbufs;      /* number of log buffers */

        int                     m_logbsize;     /* size of each log buffer */

        uint                    m_rsumlevels;   /* rt summary levels */

        uint                    m_rsumsize;     /* size of rt summary, bytes */

        struct xfs_inode        *m_rbmip;       /* pointer to bitmap inode */

        struct xfs_inode        *m_rsumip;      /* pointer to summary inode */

        struct xfs_inode        *m_rootip;      /* pointer to root directory */

        struct xfs_quotainfo    *m_quotainfo;   /* disk quota information */

        xfs_buftarg_t           *m_ddev_targp;  /* saves taking the address */

        xfs_buftarg_t           *m_logdev_targp;/* ptr to log device */

        xfs_buftarg_t           *m_rtdev_targp; /* ptr to rt device */

#define m_dev           m_ddev_targp->pbr_dev

        __uint8_t               m_dircook_elog; /* log d-cookie entry bits */

        __uint8_t               m_blkbit_log;   /* blocklog + NBBY */

        __uint8_t               m_blkbb_log;    /* blocklog - BBSHIFT */

        __uint8_t               m_agno_log;     /* log #ag's */

        __uint8_t               m_agino_log;    /* #bits for agino in inum */

        __uint8_t               m_nreadaheads;  /* #readahead buffers */

        __uint16_t              m_inode_cluster_size;/* min inode buf size */

        uint                    m_blockmask;    /* sb_blocksize-1 */

        uint                    m_blockwsize;   /* sb_blocksize in words */

        uint                    m_blockwmask;   /* blockwsize-1 */

        uint                    m_alloc_mxr[2]; /* XFS_ALLOC_BLOCK_MAXRECS */

        uint                    m_alloc_mnr[2]; /* XFS_ALLOC_BLOCK_MINRECS */

        uint                    m_bmap_dmxr[2]; /* XFS_BMAP_BLOCK_DMAXRECS */

        uint                    m_bmap_dmnr[2]; /* XFS_BMAP_BLOCK_DMINRECS */

        uint                    m_inobt_mxr[2]; /* XFS_INOBT_BLOCK_MAXRECS */

        uint                    m_inobt_mnr[2]; /* XFS_INOBT_BLOCK_MINRECS */

        uint                    m_ag_maxlevels; /* XFS_AG_MAXLEVELS */

        uint                    m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */

        uint                    m_in_maxlevels; /* XFS_IN_MAXLEVELS */

        struct xfs_perag        *m_perag;       /* per-ag accounting info */

        struct rw_semaphore     m_peraglock;    /* lock for m_perag (pointer) */

        sema_t                  m_growlock;     /* growfs mutex */

        int                     m_fixedfsid[2]; /* unchanged for life of FS */

        uint                    m_dmevmask;     /* DMI events for this FS */

        uint                    m_flags;        /* global mount flags */

        uint                    m_attroffset;   /* inode attribute offset */

        uint                    m_dir_node_ents; /* #entries in a dir danode */

        uint                    m_attr_node_ents; /* #entries in attr danode */

        int                     m_ialloc_inos;  /* inodes in inode allocation */

        int                     m_ialloc_blks;  /* blocks in inode allocation */

        int                     m_litino;       /* size of inode union area */

        int                     m_inoalign_mask;/* mask sb_inoalignmt if used */

        uint                    m_qflags;       /* quota status flags */

        xfs_trans_reservations_t m_reservations;/* precomputed res values */

        __uint64_t              m_maxicount;    /* maximum inode count */

        __uint64_t              m_maxioffset;   /* maximum inode offset */

        __uint64_t              m_resblks;      /* total reserved blocks */

        __uint64_t              m_resblks_avail;/* available reserved blocks */

#if XFS_BIG_INUMS

        xfs_ino_t               m_inoadd;       /* add value for ino64_offset */

#endif

        int                     m_dalign;       /* stripe unit */

        int                     m_swidth;       /* stripe width */

        int                     m_sinoalign;    /* stripe unit inode alignmnt */

        int                     m_attr_magicpct;/* 37% of the blocksize */

        int                     m_dir_magicpct; /* 37% of the dir blocksize */

        __uint8_t               m_mk_sharedro;  /* mark shared ro on unmount */

        __uint8_t               m_inode_quiesce;/* call quiesce on new inodes.

                                                   field governed by m_ilock */

        __uint8_t               m_sectbb_log;   /* sectlog - BBSHIFT */

        __uint8_t               m_dirversion;   /* 1 or 2 */

        xfs_dirops_t            m_dirops;       /* table of dir funcs */

        int                     m_dirblksize;   /* directory block sz--bytes */

        int                     m_dirblkfsbs;   /* directory block sz--fsbs */

        xfs_dablk_t             m_dirdatablk;   /* blockno of dir data v2 */

        xfs_dablk_t             m_dirleafblk;   /* blockno of dir non-data v2 */

        xfs_dablk_t             m_dirfreeblk;   /* blockno of dirfreeindex v2 */

        int                     m_chsize;       /* size of next field */

        struct xfs_chash        *m_chash;       /* fs private inode per-cluster

                                                 * hash table */

        struct xfs_dmops        m_dm_ops;       /* vector of DMI ops */

        struct xfs_qmops        m_qm_ops;       /* vector of XQM ops */

        struct xfs_ioops        m_io_ops;       /* vector of I/O ops */

        lock_t                  m_freeze_lock;  /* Lock for m_frozen */

        uint                    m_frozen;       /* FS frozen for shutdown or

                                                 * snapshot */

        sv_t                    m_wait_unfreeze;/* waiting to unfreeze */

        atomic_t                m_active_trans; /* number trans frozen */

} xfs_mount_t;

/*

 * Flags for m_flags.

 */

#define XFS_MOUNT_WSYNC         0x00000001      /* for nfs - all metadata ops

                                                   must be synchronous except

                                                   for space allocations */

#define XFS_MOUNT_INO64         0x00000002

                             /* 0x00000004      -- currently unused */

                             /* 0x00000008      -- currently unused */

#define XFS_MOUNT_FS_SHUTDOWN   0x00000010      /* atomic stop of all filesystem

                                                   operations, typically for

                                                   disk errors in metadata */

#define XFS_MOUNT_NOATIME       0x00000020      /* don't modify inode access

                                                   times on reads */

#define XFS_MOUNT_RETERR        0x00000040      /* return alignment errors to

                                                   user */

#define XFS_MOUNT_NOALIGN       0x00000080      /* turn off stripe alignment

                                                   allocations */

                             /* 0x00000100      -- currently unused */

                             /* 0x00000200      -- currently unused */

#define XFS_MOUNT_NORECOVERY    0x00000400      /* no recovery - dirty fs */

#define XFS_MOUNT_SHARED        0x00000800      /* shared mount */

#define XFS_MOUNT_DFLT_IOSIZE   0x00001000      /* set default i/o size */

#define XFS_MOUNT_OSYNCISOSYNC  0x00002000      /* o_sync is REALLY o_sync */

                                                /* osyncisdsync is now default*/

#define XFS_MOUNT_32BITINODES   0x00004000      /* do not create inodes above

                                                 * 32 bits in size */

#define XFS_MOUNT_32BITINOOPT   0x00008000      /* saved mount option state */

#define XFS_MOUNT_NOUUID        0x00010000      /* ignore uuid during mount */

#define XFS_MOUNT_NOLOGFLUSH    0x00020000

#define XFS_MOUNT_IDELETE       0x00040000      /* delete empty inode clusters*/

/*

 * Default minimum read and write sizes.

 */

#define XFS_READIO_LOG_LARGE    16

#define XFS_WRITEIO_LOG_LARGE   16

/*

 * Default allocation size

 */

#define XFS_WRITE_IO_LOG        16

/*

 * Max and min values for UIO and mount-option defined I/O sizes;

 * min value can't be less than a page.  Currently unused.

 */

#define XFS_MAX_IO_LOG          16      /* 64K */

#define XFS_MIN_IO_LOG          PAGE_SHIFT

/*

 * Synchronous read and write sizes.  This should be

 * better for NFSv2 wsync filesystems.

 */

#define XFS_WSYNC_READIO_LOG    15      /* 32K */

#define XFS_WSYNC_WRITEIO_LOG   14      /* 16K */

#define XFS_MAXIOFFSET(mp)      ((mp)->m_maxioffset)

#define XFS_FORCED_SHUTDOWN(mp) ((mp)->m_flags & XFS_MOUNT_FS_SHUTDOWN)

#define xfs_force_shutdown(m,f) \

        VFS_FORCE_SHUTDOWN((XFS_MTOVFS(m)), f, __FILE__, __LINE__)

/*

 * Flags sent to xfs_force_shutdown.

 */

#define XFS_METADATA_IO_ERROR   0x1

#define XFS_LOG_IO_ERROR        0x2

#define XFS_FORCE_UMOUNT        0x4

#define XFS_CORRUPT_INCORE      0x8     /* Corrupt in-memory data structures */

#define XFS_SHUTDOWN_REMOTE_REQ 0x10    /* Shutdown came from remote cell */

/*

 * xflags for xfs_syncsub

 */

#define XFS_XSYNC_RELOC         0x01

/*

 * Flags for xfs_mountfs

 */

#define XFS_MFSI_SECOND         0x01    /* Secondary mount -- skip stuff */

#define XFS_MFSI_CLIENT         0x02    /* Is a client -- skip lots of stuff */

#define XFS_MFSI_NOUNLINK       0x08    /* Skip unlinked inode processing in */

                                        /* log recovery */

/*

 * Macros for getting from mount to vfs and back.

 */

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_MTOVFS)

struct vfs *xfs_mtovfs(xfs_mount_t *mp);

#define XFS_MTOVFS(mp)          xfs_mtovfs(mp)

#else

#define XFS_MTOVFS(mp)          (bhvtovfs(&(mp)->m_bhv))

#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOM)

xfs_mount_t *xfs_bhvtom(bhv_desc_t *bdp);

#define XFS_BHVTOM(bdp) xfs_bhvtom(bdp)

#else

#define XFS_BHVTOM(bdp)         ((xfs_mount_t *)BHV_PDATA(bdp))

#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_VFSTOM)

xfs_mount_t *xfs_vfstom(vfs_t *vfs);

#define XFS_VFSTOM(vfs) xfs_vfstom(vfs)

#else

#define XFS_VFSTOM(vfs)         \

        (XFS_BHVTOM(bhv_lookup(VFS_BHVHEAD(vfs), &xfs_vfsops)))

#endif

/*

 * Moved here from xfs_ag.h to avoid reordering header files

 */

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGNO)

xfs_agnumber_t xfs_daddr_to_agno(struct xfs_mount *mp, xfs_daddr_t d);

#define XFS_DADDR_TO_AGNO(mp,d)         xfs_daddr_to_agno(mp,d)

#else

static inline xfs_agnumber_t XFS_DADDR_TO_AGNO(xfs_mount_t *mp, xfs_daddr_t d)

{

        d = XFS_BB_TO_FSBT(mp, d);

        do_div(d, mp->m_sb.sb_agblocks);

        return (xfs_agnumber_t) d;

}

#endif

#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_DADDR_TO_AGBNO)

xfs_agblock_t xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d);

#define XFS_DADDR_TO_AGBNO(mp,d)        xfs_daddr_to_agbno(mp,d)

#else

static inline xfs_agblock_t XFS_DADDR_TO_AGBNO(xfs_mount_t *mp, xfs_daddr_t d)

{

        d = XFS_BB_TO_FSBT(mp, d);

        return (xfs_agblock_t) do_div(d, mp->m_sb.sb_agblocks);

}

#endif

/*

 * This structure is for use by the xfs_mod_incore_sb_batch() routine.

 */

typedef struct xfs_mod_sb {

        xfs_sb_field_t  msb_field;      /* Field to modify, see below */

        int             msb_delta;      /* Change to make to specified field */

} xfs_mod_sb_t;

#define XFS_MOUNT_ILOCK(mp)     mutex_lock(&((mp)->m_ilock), PINOD)

#define XFS_MOUNT_IUNLOCK(mp)   mutex_unlock(&((mp)->m_ilock))

#define XFS_SB_LOCK(mp)         mutex_spinlock(&(mp)->m_sb_lock)

#define XFS_SB_UNLOCK(mp,s)     mutex_spinunlock(&(mp)->m_sb_lock,(s))

extern xfs_mount_t *xfs_mount_init(void);

extern void     xfs_mod_sb(xfs_trans_t *, __int64_t);

extern void     xfs_mount_free(xfs_mount_t *mp, int remove_bhv);

extern int      xfs_mountfs(struct vfs *, xfs_mount_t *mp, int);

extern int      xfs_unmountfs(xfs_mount_t *, struct cred *);

extern void     xfs_unmountfs_close(xfs_mount_t *, struct cred *);

extern int      xfs_unmountfs_writesb(xfs_mount_t *);

extern int      xfs_unmount_flush(xfs_mount_t *, int);

extern int      xfs_mod_incore_sb(xfs_mount_t *, xfs_sb_field_t, int, int);

extern int      xfs_mod_incore_sb_batch(xfs_mount_t *, xfs_mod_sb_t *,

                        uint, int);

extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);

extern int      xfs_readsb(xfs_mount_t *mp);

extern void     xfs_freesb(xfs_mount_t *);

extern void     xfs_do_force_shutdown(bhv_desc_t *, int, char *, int);

extern int      xfs_syncsub(xfs_mount_t *, int, int, int *);

extern void     xfs_initialize_perag(xfs_mount_t *, int);

extern void     xfs_xlatesb(void *, struct xfs_sb *, int, xfs_arch_t,

                        __int64_t);

/*

 * Flags for freeze operations.

 */

#define XFS_FREEZE_WRITE        1

#define XFS_FREEZE_TRANS        2

extern void     xfs_start_freeze(xfs_mount_t *, int);

extern void     xfs_finish_freeze(xfs_mount_t *);

extern void     xfs_check_frozen(xfs_mount_t *, bhv_desc_t *, int);

extern struct vfsops xfs_vfsops;

extern struct vnodeops xfs_vnodeops;

extern struct xfs_dmops xfs_dmcore_stub;

extern struct xfs_qmops xfs_qmcore_stub;

extern struct xfs_ioops xfs_iocore_xfs;

extern int      xfs_init(void);

extern void     xfs_cleanup(void);

#endif  /* __KERNEL__ */

#endif  /* __XFS_MOUNT_H__ */