1// SPDX-License-Identifier: GPL-2.0 2/* 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 XFS 14 */ 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 <asm/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_ENDIAN 87#define XFS_NATIVE_HOST 1 88#else 89#undef XFS_NATIVE_HOST 90#endif 91 92#define irix_sgid_inherit xfs_params.sgid_inherit.val 93#define irix_symlink_mode xfs_params.symlink_mode.val 94#define xfs_panic_mask xfs_params.panic_mask.val 95#define xfs_error_level xfs_params.error_level.val 96#define xfs_syncd_centisecs xfs_params.syncd_timer.val 97#define xfs_stats_clear xfs_params.stats_clear.val 98#define xfs_inherit_sync xfs_params.inherit_sync.val 99#define xfs_inherit_nodump xfs_params.inherit_nodump.val 100#define xfs_inherit_noatime xfs_params.inherit_noatim.val 101#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 102#define xfs_rotorstep xfs_params.rotorstep.val 103#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 104#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 105#define xfs_blockgc_secs xfs_params.blockgc_timer.val 106 107#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_SHIFT 120#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 optimizer 133 * won't reorder code to refactor the error jumpouts into a single 134 * return, which throws off the reported address. 135 */ 136#define __this_address ({ __label__ __here; __here: barrier(); &&__here; }) 137 138#define XFS_PROJID_DEFAULT 0 139 140#define howmany(x, y) (((x)+((y)-1))/(y)) 141 142static inline void delay(long ticks) 143{ 144 schedule_timeout_uninterruptible(ticks); 145} 146 147/* 148 * XFS wrapper structure for sysfs support. It depends on external data 149 * structures and is embedded in various internal data structures to implement 150 * the XFS sysfs object heirarchy. Define it here for broad access throughout 151 * the codebase. 152 */ 153struct xfs_kobj { 154 struct kobject kobject; 155 struct completion complete; 156}; 157 158struct xstats { 159 struct xfsstats __percpu *xs_stats; 160 struct xfs_kobj xs_kobj; 161}; 162 163extern struct xstats xfsstats; 164 165static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev) 166{ 167 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev)); 168} 169 170static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev) 171{ 172 return sysv_encode_dev(dev); 173} 174 175/* 176 * Various platform dependent calls that don't fit anywhere else 177 */ 178#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 179#define xfs_stack_trace() dump_stack() 180 181static inline uint64_t rounddown_64(uint64_t x, uint32_t y) 182{ 183 do_div(x, y); 184 return x * y; 185} 186 187static inline uint64_t roundup_64(uint64_t x, uint32_t y) 188{ 189 x += y - 1; 190 do_div(x, y); 191 return x * y; 192} 193 194static inline uint64_t howmany_64(uint64_t x, uint32_t y) 195{ 196 x += y - 1; 197 do_div(x, y); 198 return x; 199} 200 201/* If @b is a power of 2, return log2(b). Else return -1. */ 202static inline int8_t log2_if_power2(unsigned long b) 203{ 204 return is_power_of_2(b) ? ilog2(b) : -1; 205} 206 207/* If @b is a power of 2, return a mask of the lower bits, else return zero. */ 208static inline unsigned long long mask64_if_power2(unsigned long b) 209{ 210 return is_power_of_2(b) ? b - 1 : 0; 211} 212 213int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, 214 char *data, enum req_op op); 215 216#define ASSERT_ALWAYS(expr) \ 217 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 218 219#ifdef DEBUG 220#define ASSERT(expr) \ 221 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 222 223#else /* !DEBUG */ 224 225#ifdef XFS_WARN 226 227#define ASSERT(expr) \ 228 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__)) 229 230#else /* !DEBUG && !XFS_WARN */ 231 232#define ASSERT(expr) ((void)0) 233 234#endif /* XFS_WARN */ 235#endif /* DEBUG */ 236 237#define XFS_IS_CORRUPT(mp, expr) \ 238 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \ 239 NULL, 0, __FILE__, __LINE__, \ 240 __this_address), \ 241 true : false) 242 243#define STATIC static noinline 244 245#ifdef CONFIG_XFS_RT 246 247/* 248 * make sure we ignore the inode flag if the filesystem doesn't have a 249 * configured realtime device. 250 */ 251#define XFS_IS_REALTIME_INODE(ip) \ 252 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \ 253 (ip)->i_mount->m_rtdev_targp) 254#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0) 255#else 256#define XFS_IS_REALTIME_INODE(ip) (0) 257#define XFS_IS_REALTIME_MOUNT(mp) (0) 258#endif 259 260/* 261 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier 262 * prints a hashed version of the pointer to avoid leaking kernel 263 * pointers into dmesg. If we're trying to debug the kernel we want the 264 * raw values, so override this behavior as best we can. 265 */ 266#ifdef DEBUG 267# define PTR_FMT "%px" 268#else 269# define PTR_FMT "%p" 270#endif 271 272/* 273 * Helper for IO routines to grab backing pages from allocated kernel memory. 274 */ 275static inline struct page * 276kmem_to_page(void *addr) 277{ 278 if (is_vmalloc_addr(addr)) 279 return vmalloc_to_page(addr); 280 return virt_to_page(addr); 281} 282 283#endif /* __XFS_LINUX__ */ 284