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 16 typedef __s64 xfs_off_t; /* <file offset> type */ 17 typedef unsigned long long xfs_ino_t; /* <inode> type */ 18 typedef __s64 xfs_daddr_t; /* <disk address> type */ 19 typedef __u32 xfs_dev_t; 20 typedef __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 85 #ifdef __BIG_ENDIAN 86 #define XFS_NATIVE_HOST 1 87 #else 88 #undef XFS_NATIVE_HOST 89 #endif 90 91 #define irix_sgid_inherit xfs_params.sgid_inherit.val 92 #define irix_symlink_mode xfs_params.symlink_mode.val 93 #define xfs_panic_mask xfs_params.panic_mask.val 94 #define xfs_error_level xfs_params.error_level.val 95 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 96 #define xfs_stats_clear xfs_params.stats_clear.val 97 #define xfs_inherit_sync xfs_params.inherit_sync.val 98 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 99 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 100 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 101 #define xfs_rotorstep xfs_params.rotorstep.val 102 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 103 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 104 #define xfs_blockgc_secs xfs_params.blockgc_timer.val 105 106 #define current_cpu() (raw_smp_processor_id()) 107 #define current_set_flags_nested(sp, f) \ 108 (*(sp) = current->flags, current->flags |= (f)) 109 #define current_restore_flags_nested(sp, f) \ 110 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 111 112 #define NBBY 8 /* number of bits per byte */ 113 114 /* 115 * Size of block device i/o is parameterized here. 116 * Currently the system supports page-sized i/o. 117 */ 118 #define BLKDEV_IOSHIFT PAGE_SHIFT 119 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 120 /* number of BB's per block device block */ 121 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 122 123 #define ENOATTR ENODATA /* Attribute not found */ 124 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 125 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 126 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 127 128 #define __return_address __builtin_return_address(0) 129 130 /* 131 * Return the address of a label. Use barrier() so that the optimizer 132 * won't reorder code to refactor the error jumpouts into a single 133 * return, which throws off the reported address. 134 */ 135 #define __this_address ({ __label__ __here; __here: barrier(); &&__here; }) 136 137 #define XFS_PROJID_DEFAULT 0 138 139 #define howmany(x, y) (((x)+((y)-1))/(y)) 140 141 static inline void delay(long ticks) 142 { 143 schedule_timeout_uninterruptible(ticks); 144 } 145 146 /* 147 * XFS wrapper structure for sysfs support. It depends on external data 148 * structures and is embedded in various internal data structures to implement 149 * the XFS sysfs object heirarchy. Define it here for broad access throughout 150 * the codebase. 151 */ 152 struct xfs_kobj { 153 struct kobject kobject; 154 struct completion complete; 155 }; 156 157 struct xstats { 158 struct xfsstats __percpu *xs_stats; 159 struct xfs_kobj xs_kobj; 160 }; 161 162 extern struct xstats xfsstats; 163 164 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev) 165 { 166 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev)); 167 } 168 169 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev) 170 { 171 return sysv_encode_dev(dev); 172 } 173 174 /* 175 * Various platform dependent calls that don't fit anywhere else 176 */ 177 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 178 #define xfs_stack_trace() dump_stack() 179 180 static inline uint64_t rounddown_64(uint64_t x, uint32_t y) 181 { 182 do_div(x, y); 183 return x * y; 184 } 185 186 static inline uint64_t roundup_64(uint64_t x, uint32_t y) 187 { 188 x += y - 1; 189 do_div(x, y); 190 return x * y; 191 } 192 193 static inline uint64_t howmany_64(uint64_t x, uint32_t y) 194 { 195 x += y - 1; 196 do_div(x, y); 197 return x; 198 } 199 200 /* If @b is a power of 2, return log2(b). Else return -1. */ 201 static inline int8_t log2_if_power2(unsigned long b) 202 { 203 return is_power_of_2(b) ? ilog2(b) : -1; 204 } 205 206 /* If @b is a power of 2, return a mask of the lower bits, else return zero. */ 207 static inline unsigned long long mask64_if_power2(unsigned long b) 208 { 209 return is_power_of_2(b) ? b - 1 : 0; 210 } 211 212 int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, 213 char *data, enum req_op op); 214 215 #define ASSERT_ALWAYS(expr) \ 216 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 217 218 #ifdef DEBUG 219 #define ASSERT(expr) \ 220 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 221 222 #else /* !DEBUG */ 223 224 #ifdef XFS_WARN 225 226 #define ASSERT(expr) \ 227 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__)) 228 229 #else /* !DEBUG && !XFS_WARN */ 230 231 #define ASSERT(expr) ((void)0) 232 233 #endif /* XFS_WARN */ 234 #endif /* DEBUG */ 235 236 #define XFS_IS_CORRUPT(mp, expr) \ 237 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \ 238 NULL, 0, __FILE__, __LINE__, \ 239 __this_address), \ 240 true : false) 241 242 #define STATIC static noinline 243 244 #ifdef CONFIG_XFS_RT 245 246 /* 247 * make sure we ignore the inode flag if the filesystem doesn't have a 248 * configured realtime device. 249 */ 250 #define XFS_IS_REALTIME_INODE(ip) \ 251 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \ 252 (ip)->i_mount->m_rtdev_targp) 253 #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0) 254 #else 255 #define XFS_IS_REALTIME_INODE(ip) (0) 256 #define XFS_IS_REALTIME_MOUNT(mp) (0) 257 #endif 258 259 /* 260 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier 261 * prints a hashed version of the pointer to avoid leaking kernel 262 * pointers into dmesg. If we're trying to debug the kernel we want the 263 * raw values, so override this behavior as best we can. 264 */ 265 #ifdef DEBUG 266 # define PTR_FMT "%px" 267 #else 268 # define PTR_FMT "%p" 269 #endif 270 271 /* 272 * Helper for IO routines to grab backing pages from allocated kernel memory. 273 */ 274 static inline struct page * 275 kmem_to_page(void *addr) 276 { 277 if (is_vmalloc_addr(addr)) 278 return vmalloc_to_page(addr); 279 return virt_to_page(addr); 280 } 281 282 #endif /* __XFS_LINUX__ */ 283