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1// SPDX-License-Identifier: GPL-2.02/*3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.4 * All Rights Reserved.5 */6#ifndef __XFS_LINUX__7#define __XFS_LINUX__8 9#include <linux/types.h>10#include <linux/uuid.h>11 12/*13 * Kernel specific type declarations for XFS14 */15 16typedef __s64 xfs_off_t; /* <file offset> type */17typedef unsigned long long xfs_ino_t; /* <inode> type */18typedef __s64 xfs_daddr_t; /* <disk address> type */19typedef __u32 xfs_dev_t;20typedef __u32 xfs_nlink_t;21 22#include "xfs_types.h"23 24#include <linux/semaphore.h>25#include <linux/mm.h>26#include <linux/sched/mm.h>27#include <linux/kernel.h>28#include <linux/blkdev.h>29#include <linux/slab.h>30#include <linux/vmalloc.h>31#include <linux/crc32c.h>32#include <linux/module.h>33#include <linux/mutex.h>34#include <linux/file.h>35#include <linux/filelock.h>36#include <linux/swap.h>37#include <linux/errno.h>38#include <linux/sched/signal.h>39#include <linux/bitops.h>40#include <linux/major.h>41#include <linux/pagemap.h>42#include <linux/vfs.h>43#include <linux/seq_file.h>44#include <linux/init.h>45#include <linux/list.h>46#include <linux/proc_fs.h>47#include <linux/sort.h>48#include <linux/cpu.h>49#include <linux/notifier.h>50#include <linux/delay.h>51#include <linux/log2.h>52#include <linux/rwsem.h>53#include <linux/spinlock.h>54#include <linux/random.h>55#include <linux/ctype.h>56#include <linux/writeback.h>57#include <linux/capability.h>58#include <linux/kthread.h>59#include <linux/freezer.h>60#include <linux/list_sort.h>61#include <linux/ratelimit.h>62#include <linux/rhashtable.h>63#include <linux/xattr.h>64#include <linux/mnt_idmapping.h>65#include <linux/debugfs.h>66 67#include <asm/page.h>68#include <asm/div64.h>69#include <asm/param.h>70#include <linux/uaccess.h>71#include <asm/byteorder.h>72#include <linux/unaligned.h>73 74#include "xfs_fs.h"75#include "xfs_stats.h"76#include "xfs_sysctl.h"77#include "xfs_iops.h"78#include "xfs_aops.h"79#include "xfs_super.h"80#include "xfs_cksum.h"81#include "xfs_buf.h"82#include "xfs_message.h"83#include "xfs_drain.h"84#include "xfs_hooks.h"85 86#ifdef __BIG_ENDIAN87#define XFS_NATIVE_HOST 188#else89#undef XFS_NATIVE_HOST90#endif91 92#define irix_sgid_inherit xfs_params.sgid_inherit.val93#define irix_symlink_mode xfs_params.symlink_mode.val94#define xfs_panic_mask xfs_params.panic_mask.val95#define xfs_error_level xfs_params.error_level.val96#define xfs_syncd_centisecs xfs_params.syncd_timer.val97#define xfs_stats_clear xfs_params.stats_clear.val98#define xfs_inherit_sync xfs_params.inherit_sync.val99#define xfs_inherit_nodump xfs_params.inherit_nodump.val100#define xfs_inherit_noatime xfs_params.inherit_noatim.val101#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val102#define xfs_rotorstep xfs_params.rotorstep.val103#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val104#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val105#define xfs_blockgc_secs xfs_params.blockgc_timer.val106 107#define current_cpu() (raw_smp_processor_id())108#define current_set_flags_nested(sp, f) \109 (*(sp) = current->flags, current->flags |= (f))110#define current_restore_flags_nested(sp, f) \111 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))112 113#define NBBY 8 /* number of bits per byte */114 115/*116 * Size of block device i/o is parameterized here.117 * Currently the system supports page-sized i/o.118 */119#define BLKDEV_IOSHIFT PAGE_SHIFT120#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)121/* number of BB's per block device block */122#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)123 124#define ENOATTR ENODATA /* Attribute not found */125#define EWRONGFS EINVAL /* Mount with wrong filesystem type */126#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */127#define EFSBADCRC EBADMSG /* Bad CRC detected */128 129#define __return_address __builtin_return_address(0)130 131/*132 * Return the address of a label. Use barrier() so that the optimizer133 * won't reorder code to refactor the error jumpouts into a single134 * return, which throws off the reported address.135 */136#define __this_address ({ __label__ __here; __here: barrier(); &&__here; })137 138#define howmany(x, y) (((x)+((y)-1))/(y))139 140static inline void delay(long ticks)141{142 schedule_timeout_uninterruptible(ticks);143}144 145/*146 * XFS wrapper structure for sysfs support. It depends on external data147 * structures and is embedded in various internal data structures to implement148 * the XFS sysfs object heirarchy. Define it here for broad access throughout149 * the codebase.150 */151struct xfs_kobj {152 struct kobject kobject;153 struct completion complete;154};155 156struct xstats {157 struct xfsstats __percpu *xs_stats;158 struct xfs_kobj xs_kobj;159};160 161extern struct xstats xfsstats;162 163static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)164{165 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));166}167 168static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)169{170 return sysv_encode_dev(dev);171}172 173/*174 * Various platform dependent calls that don't fit anywhere else175 */176#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)177#define xfs_stack_trace() dump_stack()178 179static inline uint64_t rounddown_64(uint64_t x, uint32_t y)180{181 do_div(x, y);182 return x * y;183}184 185static inline uint64_t roundup_64(uint64_t x, uint32_t y)186{187 x += y - 1;188 do_div(x, y);189 return x * y;190}191 192static inline uint64_t howmany_64(uint64_t x, uint32_t y)193{194 x += y - 1;195 do_div(x, y);196 return x;197}198 199static inline bool isaligned_64(uint64_t x, uint32_t y)200{201 return do_div(x, y) == 0;202}203 204/* If @b is a power of 2, return log2(b). Else return -1. */205static inline int8_t log2_if_power2(unsigned long b)206{207 return is_power_of_2(b) ? ilog2(b) : -1;208}209 210/* If @b is a power of 2, return a mask of the lower bits, else return zero. */211static inline unsigned long long mask64_if_power2(unsigned long b)212{213 return is_power_of_2(b) ? b - 1 : 0;214}215 216int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,217 char *data, enum req_op op);218 219#define ASSERT_ALWAYS(expr) \220 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))221 222#ifdef DEBUG223#define ASSERT(expr) \224 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))225 226#else /* !DEBUG */227 228#ifdef XFS_WARN229 230#define ASSERT(expr) \231 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))232 233#else /* !DEBUG && !XFS_WARN */234 235#define ASSERT(expr) ((void)0)236 237#endif /* XFS_WARN */238#endif /* DEBUG */239 240#define XFS_IS_CORRUPT(mp, expr) \241 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \242 NULL, 0, __FILE__, __LINE__, \243 __this_address), \244 true : false)245 246#define STATIC static noinline247 248#ifdef CONFIG_XFS_RT249 250/*251 * make sure we ignore the inode flag if the filesystem doesn't have a252 * configured realtime device.253 */254#define XFS_IS_REALTIME_INODE(ip) \255 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \256 (ip)->i_mount->m_rtdev_targp)257#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)258#else259#define XFS_IS_REALTIME_INODE(ip) (0)260#define XFS_IS_REALTIME_MOUNT(mp) (0)261#endif262 263/*264 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier265 * prints a hashed version of the pointer to avoid leaking kernel266 * pointers into dmesg. If we're trying to debug the kernel we want the267 * raw values, so override this behavior as best we can.268 */269#ifdef DEBUG270# define PTR_FMT "%px"271#else272# define PTR_FMT "%p"273#endif274 275/*276 * Helper for IO routines to grab backing pages from allocated kernel memory.277 */278static inline struct page *279kmem_to_page(void *addr)280{281 if (is_vmalloc_addr(addr))282 return vmalloc_to_page(addr);283 return virt_to_page(addr);284}285 286#endif /* __XFS_LINUX__ */287