/cygdrive/c/src/openafs/openafs.git/repo/src/afs/IRIX/osi_vfs.h

/*
 * Copyright 2000, International Business Machines Corporation and others.
 * All Rights Reserved.
 *
 * This software has been released under the terms of the IBM Public
 * License.  For details, see the LICENSE file in the top-level source
 * directory or online at http://www.openafs.org/dl/license10.html
 */

/*
 * SGI specific vfs related defines
 */
#ifndef _SGI_VFS_H_
#define _SGI_VFS_H_

/*
 * UFS -> XFS translations
 */
/* Note: If SGI ever has more than one behavior per vnode, we'll have
 * to search for the one we want.
 */
#define XFS_VTOI(V) ((xfs_inode_t*)((V)->v_fbhv->bd_pdata))
#define vfstom(V) (bhvtom((V)->vfs_fbhv))

struct xfs_inode;
typedef struct xfs_inode xfs_inode_t;
#define xfs_ino_t uint64_t
#define XFS_ILOCK_SHARED 0x08
struct xfs_trans;
struct xfs_mount;
extern int xfs_iget(struct mount *, struct xfs_trans *, xfs_ino_t, uint,
                    xfs_inode_t **, daddr_t);

#ifdef AFS_SGI64_ENV
#define XFS_ITOV(ip) BHV_TO_VNODE((struct bhv_desc *)(((char*)(ip)) + 6*sizeof(void*)))
#else
#define XFS_ITOV(ip) (*((vnode_t**)((((char*)(ip)) + 6*sizeof(void*)))))
#endif

/* When we have XFS only clients, then these macros will be defined in
 * terms of the XFS inode only.
 */
extern struct vnodeops *afs_xfs_vnodeopsp;

/* These need to be functions to wrap the vnode op calls. */
extern ino_t VnodeToIno(vnode_t * vp);
extern dev_t VnodeToDev(vnode_t * vp);
extern off_t VnodeToSize(vnode_t * vp);

/* Page routines are vnode ops in Irix 6.5. These macros paper over the
 * differences.
 */
#define PTOSSVP(vp, off, len)  VOP_TOSS_PAGES((vp), (off), (len), 0)
#define PFLUSHINVALVP(vp, off, len) VOP_FLUSHINVAL_PAGES((vp), (off), (len), 0)
#define PFLUSHVP(vp, len, flags, code) \
                VOP_FLUSH_PAGES((vp), 0, (len), (flags), 0, code)
#define PINVALFREE(vp, off)    VOP_INVALFREE_PAGES((vp), (off))


/*
 * VFS translations
 */
#ifdef AFS_SGI_VNODE_GLUE
/* The Octane does not have the mrlock_t in the bvh_head_t. So we should
 * not lock it.
 */
extern int afs_is_numa_arch;
#define BHV_IPREVENT(BHP) afs_is_numa_arch ? BHV_INSERT_PREVENT(BHP) : (void)0
#define BHV_IALLOW(BHP)   afs_is_numa_arch ? BHV_INSERT_ALLOW(BHP) : (void)0

/* similar definition in /usr/include/sys/vfs.h (sgi_64) */
#define VFS_STATFS(vfsp,sp,vp)\
        (*((vfsops_t *)(vfsp)->vfs_fops)->vfs_statvfs)((vfsp)->vfs_fbhv,sp,vp)
#define AFS_VOP_ATTR_SET(vp, name, value, valuelen, flags, cred, rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_attr_set)((vp)->v_fbhv,name,value,valuelen,flags,cred); \
        BHV_IALLOW(&(vp)->v_bh);        \
}

#define AFS_VOP_ATTR_GET(vp, name, value, valuelenp, flags, cred, rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_attr_get)((vp)->v_fbhv,name,value,valuelenp,flags,cred); \
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_SETATTR(vp, vap, f, cr, rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_setattr)((vp)->v_fbhv, vap, f, cr);    \
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_GETATTR(vp, vap, f, cr, rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_getattr)((vp)->v_fbhv, vap, f, cr);    \
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_REMOVE(dvp,p,cr,rv) \
{       \
        BHV_IPREVENT(&(dvp)->v_bh);     \
        rv = (*((vnodeops_t *)(dvp)->v_fops)->vop_remove)((dvp)->v_fbhv,p,cr);  \
        BHV_IALLOW(&(dvp)->v_bh);       \
}
#define AFS_VOP_LOOKUP(vp,cp,vpp,pnp,f,rdir,cr,rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_lookup)((vp)->v_fbhv,cp,vpp,pnp,f,rdir,cr);    \
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_RMDIR(dp,p,cdir,cr,rv) \
{       \
        BHV_IPREVENT(&(dp)->v_bh);      \
        rv = (*((vnodeops_t *)(dp)->v_fops)->vop_rmdir)((dp)->v_fbhv,p,cdir,cr);        \
        BHV_IALLOW(&(dp)->v_bh);        \
}
#define AFS_VOP_WRITE(vp,uiop,iof,cr,rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_write)((vp)->v_fbhv,uiop,iof,cr,&(curprocp->p_flid));\
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_READ(vp,uiop,iof,cr,rv) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        rv = (*((vnodeops_t *)(vp)->v_fops)->vop_read)((vp)->v_fbhv,uiop,iof,cr,&(curprocp->p_flid));\
        BHV_IALLOW(&(vp)->v_bh);        \
}
#define AFS_VOP_RWLOCK(vp,i) \
{       \
        BHV_IPREVENT(&(vp)->v_bh);      \
        (void)(*((vnodeops_t *)(vp)->v_fops)->vop_rwlock)((vp)->v_fbhv, i); \
        /* "allow" is done by rwunlock */       \
}
#define AFS_VOP_RWUNLOCK(vp,i) \
{       /* "prevent" was done by rwlock */    \
        (void)(*((vnodeops_t *)(vp)->v_fops)->vop_rwunlock)((vp)->v_fbhv, i);\
        BHV_IALLOW(&(vp)->v_bh);        \
}

/* VOP_RECLAIM remains as is, since it doesn't do the PREVENT/ALLOW */

#define AFS_VN_OPEN(path, seg, mode, perm, dvp, why) \
        vn_open((path), (seg), (mode), (perm), (dvp), (why), 0)
#else /* AFS_SGI_VNODE_GLUE */
#define VFS_STATFS      VFS_STATVFS
#define AFS_VOP_ATTR_SET VOP_ATTR_SET
#define AFS_VOP_ATTR_GET VOP_ATTR_GET
#define AFS_VOP_SETATTR  VOP_SETATTR
#define AFS_VOP_GETATTR  VOP_GETATTR
#define AFS_VOP_REMOVE   VOP_REMOVE
#define AFS_VOP_LOOKUP   VOP_LOOKUP
#define AFS_VOP_RMDIR    VOP_RMDIR
#define AFS_VOP_READ(vp, uiop, iof, cr, code) \
        VOP_READ((vp), (uiop), (iof), (cr), &curuthread->ut_flid, code)
#define AFS_VOP_WRITE(vp, uiop, iof, cr, code) \
        VOP_WRITE((vp), (uiop), (iof), (cr), &curuthread->ut_flid, code)

#define AFS_VN_OPEN(path, seg, mode, perm, dvp, why) \
        vn_open((path), (seg), (mode), (perm), (dvp), (why), 0, NULL)

#define AFS_VOP_RWLOCK(vp, flag)        VOP_RWLOCK((vp), (flag))
#define AFS_VOP_RWUNLOCK(vp, flag)      VOP_RWUNLOCK((vp), (flag))

#endif /* AFS_SGI_VNODE_GLUE */
#define devtovfs        vfs_devsearch
#define va_blocksize    va_blksize
#define va_blocks       va_nblocks
#define MAXNAMLEN       256

/* These macros hide the shape change inthe vnode for sgi_64 w/o NUMA.
 * They call routines so that if statements do not contain complex
 * expressions.
 */
#ifdef AFS_SGI_VNODE_GLUE
extern int afs_is_numa_arch;
typedef struct bhv_head1 {
    struct bhv_desc *bh_first;  /* first behavior in chain */
#ifdef notdef
    /* This is not present in the non NUMA machines. */
    mrlock_t bh_mrlock;         /* lock for ops-in-progress synch. */
#endif
} bhv_head1_t;

typedef struct vnode1 {
    struct vnlist v_list;       /* freelist linkage */
    uint v_flag;                /* vnode flags (see below) */
    cnt_t v_count;              /* reference count */
    u_short v_namecap;          /* name cache capability */
    enum vtype v_type;          /* vnode type */
    dev_t v_rdev;               /* device (VCHR, VBLK) */
    struct vfs *v_vfsmountedhere;       /* ptr to vfs mounted here */
    struct vfs *v_vfsp;         /* ptr to containing VFS */
    struct stdata *v_stream;    /* associated stream */
    struct filock *v_filocks;   /* ptr to filock list */
    mutex_t *v_filocksem;       /* ptr to mutex for list */
    vnumber_t v_number;         /* in-core vnode number */
    short v_listid;             /* free list id */
    cnt_t v_intpcount;          /* interp. refcount for imon */
    bhv_head1_t v_bh;           /* behavior head */

    /*
     * Used only by global cache.
     */
    struct vnode *v_hashp;      /* hash list for lookup */
    struct vnode *v_hashn;      /* hash list for lookup */

    /*
     * Values manipulated only by VM and
     * the page/buffer caches.
     */
    struct pregion *v_mreg;     /* mapped file region pointer */
    int v_dbuf;                 /* delwri buffer count */
    pgno_t v_pgcnt;             /* pages hashed to vnode */
    struct pfdat *v_dpages;     /* delwri pages */
    struct buf *v_buf;          /* vnode buffer tree head */
    unsigned int v_bufgen;      /* buf list generation number */
    mutex_t v_buf_lock;         /* mutex for buffer tree */

    vnode_pcache_t v_pc;        /* Page cache structure.
                                 * per vnode. Refer to
                                 * vnode_pcache.h
                                 * for details.
                                 */
#ifdef VNODE_TRACING
    struct ktrace *v_trace;     /* trace header structure    */
#endif
#ifdef CKPT
    ckpt_handle_t v_ckpt;       /* ckpt lookup info */
#endif
} vnode1_t;

extern struct pfdat *vnode_get_dpages(vnode_t *);
extern int vnode_get_dbuf(vnode_t *);
extern pgno_t vnode_get_pgcnt(vnode_t *);
extern struct pregion *vnode_get_mreg(vnode_t *);
#define VN_GET_DPAGES(V)        (afs_is_numa_arch ? \
                                 ((V)->v_dpages) : \
                                 (((vnode1_t*)(V))->v_dpages))
#define VN_SET_DPAGES(V, D)     (afs_is_numa_arch ? \
                                  ((V)->v_dpages = (D)) : \
                                 (((vnode1_t*)(V))->v_dpages = (D)))
#define VN_GET_DBUF(V)          (afs_is_numa_arch ? \
                                 ((V)->v_dbuf) : (((vnode1_t*)(V))->v_dbuf))
#define VN_GET_PGCNT(V)         (afs_is_numa_arch ? \
                                 ((V)->v_pgcnt) : (((vnode1_t*)(V))->v_pgcnt))
#define VN_GET_MREG(V)          (afs_is_numa_arch ? \
                                 ((V)->v_mreg) : (((vnode1_t*)(V))->v_mreg))
#define AFS_VN_MAPPED(V)        (VN_GET_MREG(V) != NULL)
#define AFS_VN_DIRTY(V)         (VN_GET_DBUF(V) || VN_GET_DPAGES(V))
#define AFS_VN_INIT_BUF_LOCK(V) \
        (afs_is_numa_arch ? \
         init_mutex(&((V)->v_buf_lock), MUTEX_DEFAULT, "vn_buf_lock", \
                    (long)(V) ) : \
         init_mutex(&(((vnode1_t*)(V))->v_buf_lock), MUTEX_DEFAULT, \
                    "vn_buf_lock", \
                    (long)(V) ))
#define AFS_VN_DESTROY_BUF_LOCK(V) \
        (afs_is_numa_arch ? \
         mutex_destroy(&((V)->v_buf_lock)) : \
         mutex_destroy(&(((vnode1_t*)(V))->v_buf_lock)))

#else
#define VN_GET_DPAGES(V)        ((V)->v_dpages)
#define VN_SET_DPAGES(V, D)     (V)->v_dpages = (D)
#define VN_GET_DBUF(V)          ((V)->v_dbuf)
#define VN_GET_PGCNT(V)         ((V)->v_pgcnt)
#define VN_GET_MREG(V)          ((V)->v_mreg)
#define AFS_VN_MAPPED           VN_MAPPED
#define AFS_VN_DIRTY            VN_DIRTY
#define AFS_VN_INIT_BUF_LOCK(V) \
        init_mutex(&((V)->v_buf_lock), MUTEX_DEFAULT, "vn_buf_lock", (long)(V))
#define AFS_VN_DESTROY_BUF_LOCK(V)      \
         mutex_destroy(&((V)->v_buf_lock))
#endif /* AFS_SGI_VNODE_GLUE */

/*
 * Misc
 */
#define ucred cred
#define uprintf printf
#define d_fileno d_ino

#define CLBYTES NBPC
/*
 * Flock(3) call. (from sys/file.h)
 */
#define LOCK_SH         1       /* shared lock */
#define LOCK_EX         2       /* exclusive lock */
#define LOCK_NB         4       /* don't block when locking */
#define LOCK_UN         8       /* unlock */

#endif


#if defined(AFS_SGI64_ENV) && defined(CKPT)
/* This is a fid for checkpoint restart. Note that the length will be
 * greater than 10 and so afs_vget can distinguish this fid.
 */
typedef struct {
    u_short af_len;
    u_short af_cell;
    u_int af_volid;
    u_int af_vno;
    u_int af_uniq;
} afs_fid2_t;
#endif /* _SGI_VFS_H_ */