378 lines
9.2 KiB
C
378 lines
9.2 KiB
C
/*
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* Copyright (c) 2000-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_LINUX__
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#define __XFS_LINUX__
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#include <linux/types.h>
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/*
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* Kernel specific type declarations for XFS
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*/
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typedef signed char __int8_t;
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typedef unsigned char __uint8_t;
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typedef signed short int __int16_t;
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typedef unsigned short int __uint16_t;
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typedef signed int __int32_t;
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typedef unsigned int __uint32_t;
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typedef signed long long int __int64_t;
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typedef unsigned long long int __uint64_t;
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typedef __s64 xfs_off_t; /* <file offset> type */
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typedef unsigned long long xfs_ino_t; /* <inode> type */
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typedef __s64 xfs_daddr_t; /* <disk address> type */
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typedef __u32 xfs_dev_t;
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typedef __u32 xfs_nlink_t;
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#include "xfs_types.h"
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#include "kmem.h"
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#include "mrlock.h"
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#include "uuid.h"
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#include <linux/semaphore.h>
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#include <linux/mm.h>
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#include <linux/kernel.h>
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#include <linux/blkdev.h>
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#include <linux/slab.h>
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#include <linux/crc32c.h>
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/file.h>
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#include <linux/swap.h>
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#include <linux/errno.h>
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#include <linux/sched.h>
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#include <linux/bitops.h>
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#include <linux/major.h>
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#include <linux/pagemap.h>
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#include <linux/vfs.h>
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#include <linux/seq_file.h>
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#include <linux/init.h>
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#include <linux/list.h>
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#include <linux/proc_fs.h>
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#include <linux/sort.h>
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#include <linux/cpu.h>
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#include <linux/notifier.h>
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#include <linux/delay.h>
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#include <linux/log2.h>
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#include <linux/spinlock.h>
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#include <linux/random.h>
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#include <linux/ctype.h>
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#include <linux/writeback.h>
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#include <linux/capability.h>
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#include <linux/kthread.h>
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#include <linux/freezer.h>
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#include <linux/list_sort.h>
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#include <linux/ratelimit.h>
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#include <asm/page.h>
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#include <asm/div64.h>
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#include <asm/param.h>
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#include <asm/uaccess.h>
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#include <asm/byteorder.h>
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#include <asm/unaligned.h>
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#include "xfs_fs.h"
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#include "xfs_stats.h"
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#include "xfs_sysctl.h"
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#include "xfs_iops.h"
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#include "xfs_aops.h"
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#include "xfs_super.h"
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#include "xfs_cksum.h"
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#include "xfs_buf.h"
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#include "xfs_message.h"
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#ifdef __BIG_ENDIAN
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#define XFS_NATIVE_HOST 1
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#else
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#undef XFS_NATIVE_HOST
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#endif
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#define irix_sgid_inherit xfs_params.sgid_inherit.val
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#define irix_symlink_mode xfs_params.symlink_mode.val
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#define xfs_panic_mask xfs_params.panic_mask.val
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#define xfs_error_level xfs_params.error_level.val
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#define xfs_syncd_centisecs xfs_params.syncd_timer.val
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#define xfs_stats_clear xfs_params.stats_clear.val
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#define xfs_inherit_sync xfs_params.inherit_sync.val
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#define xfs_inherit_nodump xfs_params.inherit_nodump.val
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#define xfs_inherit_noatime xfs_params.inherit_noatim.val
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#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
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#define xfs_rotorstep xfs_params.rotorstep.val
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#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
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#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
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#define xfs_eofb_secs xfs_params.eofb_timer.val
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#define current_cpu() (raw_smp_processor_id())
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#define current_pid() (current->pid)
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#define current_test_flags(f) (current->flags & (f))
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#define current_set_flags_nested(sp, f) \
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(*(sp) = current->flags, current->flags |= (f))
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#define current_clear_flags_nested(sp, f) \
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(*(sp) = current->flags, current->flags &= ~(f))
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#define current_restore_flags_nested(sp, f) \
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(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
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#define spinlock_destroy(lock)
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#define NBBY 8 /* number of bits per byte */
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/*
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* Size of block device i/o is parameterized here.
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* Currently the system supports page-sized i/o.
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*/
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#define BLKDEV_IOSHIFT PAGE_SHIFT
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#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
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/* number of BB's per block device block */
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#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
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#define ENOATTR ENODATA /* Attribute not found */
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#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
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#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
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#define EFSBADCRC EBADMSG /* Bad CRC detected */
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#define SYNCHRONIZE() barrier()
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#define __return_address __builtin_return_address(0)
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#define XFS_PROJID_DEFAULT 0
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#define MAXPATHLEN 1024
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#define MIN(a,b) (min(a,b))
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#define MAX(a,b) (max(a,b))
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#define howmany(x, y) (((x)+((y)-1))/(y))
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static inline void delay(long ticks)
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{
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schedule_timeout_uninterruptible(ticks);
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}
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/*
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* XFS wrapper structure for sysfs support. It depends on external data
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* structures and is embedded in various internal data structures to implement
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* the XFS sysfs object heirarchy. Define it here for broad access throughout
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* the codebase.
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*/
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struct xfs_kobj {
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struct kobject kobject;
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struct completion complete;
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};
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struct xstats {
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struct xfsstats __percpu *xs_stats;
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struct xfs_kobj xs_kobj;
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};
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extern struct xstats xfsstats;
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/* Kernel uid/gid conversion. These are used to convert to/from the on disk
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* uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
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* The conversion here is type only, the value will remain the same since we
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* are converting to the init_user_ns. The uid is later mapped to a particular
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* user namespace value when crossing the kernel/user boundary.
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*/
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static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
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{
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return from_kuid(&init_user_ns, uid);
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}
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static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
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{
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return make_kuid(&init_user_ns, uid);
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}
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static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
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{
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return from_kgid(&init_user_ns, gid);
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}
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static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
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{
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return make_kgid(&init_user_ns, gid);
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}
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/*
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* Various platform dependent calls that don't fit anywhere else
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*/
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#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
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#define xfs_stack_trace() dump_stack()
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/* Move the kernel do_div definition off to one side */
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#if defined __i386__
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/* For ia32 we need to pull some tricks to get past various versions
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* of the compiler which do not like us using do_div in the middle
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* of large functions.
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*/
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static inline __u32 xfs_do_div(void *a, __u32 b, int n)
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{
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__u32 mod;
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switch (n) {
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case 4:
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mod = *(__u32 *)a % b;
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*(__u32 *)a = *(__u32 *)a / b;
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return mod;
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case 8:
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{
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unsigned long __upper, __low, __high, __mod;
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__u64 c = *(__u64 *)a;
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__upper = __high = c >> 32;
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__low = c;
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if (__high) {
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__upper = __high % (b);
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__high = __high / (b);
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}
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asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
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asm("":"=A" (c):"a" (__low),"d" (__high));
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*(__u64 *)a = c;
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return __mod;
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}
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}
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/* NOTREACHED */
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return 0;
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}
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/* Side effect free 64 bit mod operation */
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static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
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{
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switch (n) {
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case 4:
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return *(__u32 *)a % b;
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case 8:
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{
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unsigned long __upper, __low, __high, __mod;
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__u64 c = *(__u64 *)a;
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__upper = __high = c >> 32;
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__low = c;
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if (__high) {
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__upper = __high % (b);
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__high = __high / (b);
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}
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asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
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asm("":"=A" (c):"a" (__low),"d" (__high));
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return __mod;
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}
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}
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/* NOTREACHED */
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return 0;
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}
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#else
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static inline __u32 xfs_do_div(void *a, __u32 b, int n)
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{
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__u32 mod;
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switch (n) {
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case 4:
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mod = *(__u32 *)a % b;
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*(__u32 *)a = *(__u32 *)a / b;
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return mod;
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case 8:
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mod = do_div(*(__u64 *)a, b);
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return mod;
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}
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/* NOTREACHED */
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return 0;
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}
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/* Side effect free 64 bit mod operation */
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static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
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{
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switch (n) {
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case 4:
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return *(__u32 *)a % b;
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case 8:
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{
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__u64 c = *(__u64 *)a;
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return do_div(c, b);
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}
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}
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/* NOTREACHED */
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return 0;
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}
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#endif
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#undef do_div
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#define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
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#define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
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static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
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{
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x += y - 1;
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do_div(x, y);
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return x * y;
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}
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static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
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{
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x += y - 1;
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do_div(x, y);
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return x;
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}
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/* ARM old ABI has some weird alignment/padding */
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#if defined(__arm__) && !defined(__ARM_EABI__)
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#define __arch_pack __attribute__((packed))
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#else
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#define __arch_pack
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#endif
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#define ASSERT_ALWAYS(expr) \
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(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
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#ifdef DEBUG
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#define ASSERT(expr) \
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(unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
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#ifndef STATIC
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# define STATIC noinline
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#endif
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#else /* !DEBUG */
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#ifdef XFS_WARN
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#define ASSERT(expr) \
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(unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
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#ifndef STATIC
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# define STATIC static noinline
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#endif
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#else /* !DEBUG && !XFS_WARN */
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#define ASSERT(expr) ((void)0)
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#ifndef STATIC
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# define STATIC static noinline
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#endif
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#endif /* XFS_WARN */
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#endif /* DEBUG */
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#ifdef CONFIG_XFS_RT
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#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
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#else
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#define XFS_IS_REALTIME_INODE(ip) (0)
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#endif
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#endif /* __XFS_LINUX__ */
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