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ef5a83b7e5
Avoid the costs of integer division (32-bit and 64-bit) if the realtime extent size is a power of two. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
273 lines
7.0 KiB
C
273 lines
7.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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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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#ifndef __XFS_LINUX__
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#define __XFS_LINUX__
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#include <linux/types.h>
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#include <linux/uuid.h>
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/*
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* Kernel specific type declarations for XFS
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*/
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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 <linux/semaphore.h>
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#include <linux/mm.h>
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#include <linux/sched/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/filelock.h>
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#include <linux/swap.h>
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#include <linux/errno.h>
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#include <linux/sched/signal.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 <linux/rhashtable.h>
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#include <linux/xattr.h>
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#include <linux/mnt_idmapping.h>
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#include <linux/debugfs.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 <linux/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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#include "xfs_drain.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_blockgc_secs xfs_params.blockgc_timer.val
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#define current_cpu() (raw_smp_processor_id())
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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_restore_flags_nested(sp, f) \
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(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
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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 __return_address __builtin_return_address(0)
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/*
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* Return the address of a label. Use barrier() so that the optimizer
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* won't reorder code to refactor the error jumpouts into a single
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* return, which throws off the reported address.
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*/
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#define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
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#define XFS_PROJID_DEFAULT 0
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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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static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
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{
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return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
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}
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static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
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{
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return sysv_encode_dev(dev);
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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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static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
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{
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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 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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/* If @b is a power of 2, return log2(b). Else return -1. */
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static inline int8_t log2_if_power2(unsigned long b)
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{
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return is_power_of_2(b) ? ilog2(b) : -1;
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}
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/* If @b is a power of 2, return a mask of the lower bits, else return zero. */
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static inline unsigned long long mask64_if_power2(unsigned long b)
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{
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return is_power_of_2(b) ? b - 1 : 0;
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}
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int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
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char *data, enum req_op op);
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#define ASSERT_ALWAYS(expr) \
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(likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
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#ifdef DEBUG
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#define ASSERT(expr) \
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(likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
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#else /* !DEBUG */
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#ifdef XFS_WARN
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#define ASSERT(expr) \
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(likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
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#else /* !DEBUG && !XFS_WARN */
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#define ASSERT(expr) ((void)0)
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#endif /* XFS_WARN */
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#endif /* DEBUG */
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#define XFS_IS_CORRUPT(mp, expr) \
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(unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
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NULL, 0, __FILE__, __LINE__, \
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__this_address), \
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true : false)
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#define STATIC static noinline
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#ifdef CONFIG_XFS_RT
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/*
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* make sure we ignore the inode flag if the filesystem doesn't have a
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* configured realtime device.
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*/
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#define XFS_IS_REALTIME_INODE(ip) \
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(((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
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(ip)->i_mount->m_rtdev_targp)
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#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
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#else
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#define XFS_IS_REALTIME_INODE(ip) (0)
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#define XFS_IS_REALTIME_MOUNT(mp) (0)
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#endif
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/*
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* Starting in Linux 4.15, the %p (raw pointer value) printk modifier
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* prints a hashed version of the pointer to avoid leaking kernel
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* pointers into dmesg. If we're trying to debug the kernel we want the
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* raw values, so override this behavior as best we can.
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*/
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#ifdef DEBUG
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# define PTR_FMT "%px"
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#else
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# define PTR_FMT "%p"
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#endif
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#endif /* __XFS_LINUX__ */
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