1 files changed, 374 insertions, 0 deletions

diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h
new file mode 100644
index 000000000000..71bb41019a12
--- /dev/null
+++ b/fs/xfs/linux-2.6/xfs_linux.h
@@ -0,0 +1,374 @@
+/*
+ * Copyright (c) 2000-2004 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_LINUX__
+#define __XFS_LINUX__
+
+#include <linux/types.h>
+#include <linux/config.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.
+ */
+#if defined(CONFIG_LBD) || (BITS_PER_LONG == 64)
+# define XFS_BIG_BLKNOS 1
+# if BITS_PER_LONG == 64
+#  define XFS_BIG_INUMS 1
+# else
+#  define XFS_BIG_INUMS 0
+# endif
+#else
+# define XFS_BIG_BLKNOS 0
+# define XFS_BIG_INUMS  0
+#endif
+
+#include <xfs_types.h>
+#include <xfs_arch.h>
+
+#include <kmem.h>
+#include <mrlock.h>
+#include <spin.h>
+#include <sv.h>
+#include <mutex.h>
+#include <sema.h>
+#include <time.h>
+
+#include <support/qsort.h>
+#include <support/ktrace.h>
+#include <support/debug.h>
+#include <support/move.h>
+#include <support/uuid.h>
+
+#include <linux/mm.h>
+#include <linux/kernel.h>
+#include <linux/blkdev.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/file.h>
+#include <linux/swap.h>
+#include <linux/errno.h>
+#include <linux/sched.h>
+#include <linux/bitops.h>
+#include <linux/major.h>
+#include <linux/pagemap.h>
+#include <linux/vfs.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <linux/list.h>
+#include <linux/proc_fs.h>
+#include <linux/version.h>
+#include <linux/sort.h>
+
+#include <asm/page.h>
+#include <asm/div64.h>
+#include <asm/param.h>
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+#include <asm/unaligned.h>
+
+#include <xfs_behavior.h>
+#include <xfs_vfs.h>
+#include <xfs_cred.h>
+#include <xfs_vnode.h>
+#include <xfs_stats.h>
+#include <xfs_sysctl.h>
+#include <xfs_iops.h>
+#include <xfs_super.h>
+#include <xfs_globals.h>
+#include <xfs_fs_subr.h>
+#include <xfs_lrw.h>
+#include <xfs_buf.h>
+
+/*
+ * Feature macros (disable/enable)
+ */
+#undef  HAVE_REFCACHE   /* reference cache not needed for NFS in 2.6 */
+#define HAVE_SENDFILE   /* sendfile(2) exists in 2.6, but not in 2.4 */
+
+/*
+ * State flag for unwritten extent buffers.
+ *
+ * We need to be able to distinguish between these and delayed
+ * allocate buffers within XFS.  The generic IO path code does
+ * not need to distinguish - we use the BH_Delay flag for both
+ * delalloc and these ondisk-uninitialised buffers.
+ */
+BUFFER_FNS(PrivateStart, unwritten);
+static inline void set_buffer_unwritten_io(struct buffer_head *bh)
+{
+        bh->b_end_io = linvfs_unwritten_done;
+}
+
+#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_centisecs     xfs_params.syncd_timer.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_buf_timer_centisecs xfs_params.xfs_buf_timer.val
+#define xfs_buf_age_centisecs   xfs_params.xfs_buf_age.val
+#define xfs_inherit_nosymlinks  xfs_params.inherit_nosym.val
+#define xfs_rotorstep           xfs_params.rotorstep.val
+
+#ifndef __smp_processor_id
+#define __smp_processor_id()    smp_processor_id()
+#endif
+#define current_cpu()           __smp_processor_id()
+#define current_pid()           (current->pid)
+#define current_fsuid(cred)     (current->fsuid)
+#define current_fsgid(cred)     (current->fsgid)
+
+#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 */
+
+/*
+ * Size of block device i/o is parameterized here.
+ * Currently the system supports page-sized i/o.
+ */
+#define BLKDEV_IOSHIFT          BPCSHIFT
+#define BLKDEV_IOSIZE           (1<<BLKDEV_IOSHIFT)
+/* number of BB's per block device block */
+#define BLKDEV_BB               BTOBB(BLKDEV_IOSIZE)
+
+/* bytes to clicks */
+#define btoc(x)         (((__psunsigned_t)(x)+(NBPC-1))>>BPCSHIFT)
+#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 ctob(x)         ((__psunsigned_t)(x)<<BPCSHIFT)
+#define btoct(x)        ((__psunsigned_t)(x)>>BPCSHIFT)
+#define ctob64(x)       ((__uint64_t)(x)<<BPCSHIFT)
+#define io_ctob(x)      ((__psunsigned_t)(x)<<IO_BPCSHIFT)
+
+/* bytes to clicks */
+#define btoc(x)         (((__psunsigned_t)(x)+(NBPC-1))>>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 MAXPATHLEN      1024
+
+#define MIN(a,b)        (min(a,b))
+#define MAX(a,b)        (max(a,b))
+#define howmany(x, y)   (((x)+((y)-1))/(y))
+#define roundup(x, y)   ((((x)+((y)-1))/(y))*(y))
+
+#define xfs_stack_trace()       dump_stack()
+
+#define xfs_itruncate_data(ip, off)     \
+        (-vmtruncate(LINVFS_GET_IP(XFS_ITOV(ip)), (off)))
+
+
+/* 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
+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);
+}
+
+#define qsort(a, n, s, cmp) sort(a, n, s, cmp, NULL)
+
+#endif /* __XFS_LINUX__ */