text: /*
   * 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_FREEBSD__
  #define __XFS_FREEBSD__
  
  #include <xfs_config.h>
  #include <xfs_compat.h>
  
  /*
   * Some types are conditional depending on the target system.
   * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
   * XFS_BIG_INUMS needs the VFS inode number to be 64 bits, as well
   * as requiring XFS_BIG_BLKNOS to be set.
   */
  #define XFS_BIG_BLKNOS	1
  #define XFS_BIG_INUMS	0
  
  #include <xfs_types.h>
  #include <xfs_arch.h>
  
  #include <support/atomic.h>
  #include <support/kmem.h>
  #include <support/mrlock.h>
  #include <support/spin.h>
  #include <support/sv.h>
  #include <support/ktrace.h>
  #include <support/mutex.h>
  #include <support/rwsem.h>
  #include <support/rwlock.h>
  #include <support/sema.h>
  #include <support/debug.h>
  #include <support/move.h>
  #include <support/uuid.h>
  #include <support/time.h>
  
  #include <xfs_behavior.h>
  #include <xfs_cred.h>
  #include <xfs_vfs.h>
  #include <xfs_vnode.h>
  #include <xfs_stats.h>
  #include <xfs_sysctl.h>
  #include <xfs_iops.h>
  #include <xfs_super.h>
  #include <xfs_fs_subr.h>
  #include <xfs_buf.h>
  #include <xfs_frw.h>
  #include <xfs_log.h>
  
  /*
   * Feature macros (disable/enable)
   */
  #undef  HAVE_REFCACHE	/* Do not use refcache. */
  #undef  HAVE_SENDFILE	/* sendfile(2) is available in FreeBSD. */
  
  #ifndef EVMS_MAJOR
  #define EVMS_MAJOR 117
  #endif
  
  #define xfs_refcache_size	xfs_params.refcache_size.val
  #define xfs_refcache_purge_count xfs_params.refcache_purge.val
  #define restricted_chown	xfs_params.restrict_chown.val
  #define irix_sgid_inherit	xfs_params.sgid_inherit.val
  #define irix_symlink_mode	xfs_params.symlink_mode.val
  #define xfs_panic_mask		xfs_params.panic_mask.val
  #define xfs_error_level		xfs_params.error_level.val
  #define xfs_syncd_interval	xfs_params.sync_interval.val
  #define xfs_probe_dmapi		xfs_params.probe_dmapi.val
  #define xfs_probe_ioops		xfs_params.probe_ioops.val
  #define xfs_probe_quota		xfs_params.probe_quota.val
  #define xfs_stats_clear		xfs_params.stats_clear.val
  #define xfs_inherit_sync	xfs_params.inherit_sync.val
  #define xfs_inherit_nodump	xfs_params.inherit_nodump.val
  #define xfs_inherit_noatime	xfs_params.inherit_noatim.val
  #define xfs_flush_interval	xfs_params.flush_interval.val
  #define xfs_age_buffer		xfs_params.age_buffer.val
  #define xfs_io_bypass		xfs_params.io_bypass.val
  
  #define current_cpu()		smp_processor_id()
  #define current_pid()		(curthread->td_proc->p_pid)
  
  #define NBPP		PAGE_SIZE
  #define DPPSHFT		(PAGE_SHIFT - 9)
  #define NDPP		(1 << (PAGE_SHIFT - 9))
  #define dtop(DD)	(((DD) + NDPP - 1) >> DPPSHFT)
  #define dtopt(DD)	((DD) >> DPPSHFT)
  #define dpoff(DD)	((DD) & (NDPP-1))
  
  #define NBBY		8		/* number of bits per byte */
  #define	NBPC		PAGE_SIZE	/* Number of bytes per click */
  #define	BPCSHIFT	PAGE_SHIFT	/* LOG2(NBPC) if exact */
  
  /* number of BB's per block device block */
  #define	BLKDEV_BB	BTOBB(BLKDEV_IOSIZE)
  
  /* bytes to clicks */
  #define	btoct(x)	((__psunsigned_t)(x)>>BPCSHIFT)
  #define	btoc64(x)	(((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
  #define	btoct64(x)	((__uint64_t)(x)>>BPCSHIFT)
  #define	io_btoc(x)	(((__psunsigned_t)(x)+(IO_NBPC-1))>>IO_BPCSHIFT)
  #define	io_btoct(x)	((__psunsigned_t)(x)>>IO_BPCSHIFT)
  
  /* off_t bytes to clicks */
  #define offtoc(x)       (((__uint64_t)(x)+(NBPC-1))>>BPCSHIFT)
  #define offtoct(x)      ((xfs_off_t)(x)>>BPCSHIFT)
  
  /* clicks to off_t bytes */
  #define	ctooff(x)	((xfs_off_t)(x)<<BPCSHIFT)
  
  /* clicks to bytes */
  #define btoct(x)        ((__psunsigned_t)(x)>>BPCSHIFT)
  #define	ctob64(x)	((__uint64_t)(x)<<BPCSHIFT)
  #define	io_ctob(x)	((__psunsigned_t)(x)<<IO_BPCSHIFT)
  
  #ifndef CELL_CAPABLE
  #define FSC_NOTIFY_NAME_CHANGED(vp)
  #endif
  
  #ifndef ENOATTR
  #define ENOATTR		ENODATA		/* Attribute not found */
  #endif
  
  /* Note: EWRONGFS never visible outside the kernel */
  #define	EWRONGFS	EINVAL		/* Mount with wrong filesystem type */
  
  /*
   * XXX EFSCORRUPTED needs a real value in errno.h. asm-i386/errno.h won't
   *     return codes out of its known range in errno.
   * XXX Also note: needs to be < 1000 and fairly unique on Linux (mustn't
   *     conflict with any code we use already or any code a driver may use)
   * XXX Some options (currently we do #2):
   *	1/ New error code ["Filesystem is corrupted", _after_ glibc updated]
   *	2/ 990 ["Unknown error 990"]
   *	3/ EUCLEAN ["Structure needs cleaning"]
   *	4/ Convert EFSCORRUPTED to EIO [just prior to return into userspace]
   */
  #define EFSCORRUPTED    990		/* Filesystem is corrupted */
  
  #define SYNCHRONIZE()	barrier()
  #define __return_address __builtin_return_address(0)
  
  /*
   * IRIX (BSD) quotactl makes use of separate commands for user/group,
   * whereas on Linux the syscall encodes this information into the cmd
   * field (see the QCMD macro in quota.h).  These macros help keep the
   * code portable - they are not visible from the syscall interface.
   */
  #define Q_XSETGQLIM	XQM_CMD(0x8)	/* set groups disk limits */
  #define Q_XGETGQUOTA	XQM_CMD(0x9)	/* get groups disk limits */
  
  /* IRIX uses a dynamic sizing algorithm (ndquot = 200 + numprocs*2) */
  /* we may well need to fine-tune this if it ever becomes an issue.  */
  #define DQUOT_MAX_HEURISTIC	1024	/* NR_DQUOTS */
  #define ndquot			DQUOT_MAX_HEURISTIC
  
  /* IRIX uses the current size of the name cache to guess a good value */
  /* - this isn't the same but is a good enough starting point for now. */
  #define DQUOT_HASH_HEURISTIC	files_stat.nr_files
  
  /* IRIX inodes maintain the project ID also, zero this field on Linux */
  #define DEFAULT_PROJID	0
  #define dfltprid	DEFAULT_PROJID
  
  #define FINVIS		0x0102	/* don't update timestamps - XFS */
  
  #define howmany(x, y)	(((x)+((y)-1))/(y))
  #define roundup(x, y)	((((x)+((y)-1))/(y))*(y))
  
  #ifndef __user
  #define __user
  #endif
  
  /*
   * Juggle IRIX device numbers - still used in ondisk structures
   */
  #define XFS_DEV_BITSMAJOR	14
  #define XFS_DEV_BITSMINOR	18
  #define XFS_DEV_MAXMAJ		0x1ff
  #define XFS_DEV_MAXMIN		0x3ffff
  #define XFS_DEV_MAJOR(dev)	((int)(((unsigned)(dev)>>XFS_DEV_BITSMINOR) \
  				    & XFS_DEV_MAXMAJ))
  #define XFS_DEV_MINOR(dev)	((int)((dev)&XFS_DEV_MAXMIN))
  #define XFS_MKDEV(major,minor) ((xfs_dev_t)(((major)<<XFS_DEV_BITSMINOR) \
  				    | (minor&XFS_DEV_MAXMIN)))
  
  #define XFS_DEV_TO_KDEVT(dev)	mk_kdev(XFS_DEV_MAJOR(dev),XFS_DEV_MINOR(dev))
  
  
  /* Produce a kernel stack trace */
  
  static inline void xfs_stack_trace(void)
  {
  	kdb_backtrace();
  }
  
  
  /* Move the kernel do_div definition off to one side */
  
  #if defined __i386__
  /* For ia32 we need to pull some tricks to get past various versions
   * of the compiler which do not like us using do_div in the middle
   * of large functions.
   */
  static inline __u32 xfs_do_div(void *a, __u32 b, int n)
  {
  	__u32	mod;
  
  	switch (n) {
  		case 4:
  			mod = *(__u32 *)a % b;
  			*(__u32 *)a = *(__u32 *)a / b;
  			return mod;
  		case 8:
  			{
  			unsigned long __upper, __low, __high, __mod;
  			__u64	c = *(__u64 *)a;
  			__upper = __high = c >> 32;
  			__low = c;
  			if (__high) {
  				__upper = __high % (b);
  				__high = __high / (b);
  			}
  			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
  			asm("":"=A" (c):"a" (__low),"d" (__high));
  			*(__u64 *)a = c;
  			return __mod;
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  
  /* Side effect free 64 bit mod operation */
  static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
  {
  	switch (n) {
  		case 4:
  			return *(__u32 *)a % b;
  		case 8:
  			{
  			unsigned long __upper, __low, __high, __mod;
  			__u64	c = *(__u64 *)a;
  			__upper = __high = c >> 32;
  			__low = c;
  			if (__high) {
  				__upper = __high % (b);
  				__high = __high / (b);
  			}
  			asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
  			asm("":"=A" (c):"a" (__low),"d" (__high));
  			return __mod;
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  #else
  
  #define do_div(n, base) ({\
  	int __res; \
  	__res = ((__u64)(n)) % (__u32)(base); \
  	(n) = ((__u64)(n)) / (__u32)(base); \
  	__res; })
  
  static inline __u32 xfs_do_div(void *a, __u32 b, int n)
  {
  	__u32	mod;
  
  	switch (n) {
  		case 4:
  			mod = *(__u32 *)a % b;
  			*(__u32 *)a = *(__u32 *)a / b;
  			return mod;
  		case 8:
  			mod = do_div(*(__u64 *)a, b);
  			return mod;
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  
  /* Side effect free 64 bit mod operation */
  static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
  {
  	switch (n) {
  		case 4:
  			return *(__u32 *)a % b;
  		case 8:
  			{
  			__u64	c = *(__u64 *)a;
  			return do_div(c, b);
  			}
  	}
  
  	/* NOTREACHED */
  	return 0;
  }
  #endif
  
  #undef do_div
  #define do_div(a, b)	xfs_do_div(&(a), (b), sizeof(a))
  #define do_mod(a, b)	xfs_do_mod(&(a), (b), sizeof(a))
  
  static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
  {
  	x += y - 1;
  	do_div(x, y);
  	return(x * y);
  }
  
  static inline unsigned long ffz(unsigned long val)
  {
          val = ffsl(~val);
          return val;
  }
  
  #endif /* __XFS_FREEBSD__ */
  