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 <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_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 howmany(x, y) (((x)+((y)-1))/(y)) 139 delay(long ticks)140 static 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 data 147 * structures and is embedded in various internal data structures to implement 148 * the XFS sysfs object heirarchy. Define it here for broad access throughout 149 * the codebase. 150 */ 151 struct xfs_kobj { 152 struct kobject kobject; 153 struct completion complete; 154 }; 155 156 struct xstats { 157 struct xfsstats __percpu *xs_stats; 158 struct xfs_kobj xs_kobj; 159 }; 160 161 extern struct xstats xfsstats; 162 xfs_to_linux_dev_t(xfs_dev_t dev)163 static 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 linux_to_xfs_dev_t(dev_t dev)168 static 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 else 175 */ 176 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 177 #define xfs_stack_trace() dump_stack() 178 rounddown_64(uint64_t x,uint32_t y)179 static inline uint64_t rounddown_64(uint64_t x, uint32_t y) 180 { 181 do_div(x, y); 182 return x * y; 183 } 184 roundup_64(uint64_t x,uint32_t y)185 static 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 howmany_64(uint64_t x,uint32_t y)192 static 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 isaligned_64(uint64_t x,uint32_t y)199 static 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. */ log2_if_power2(unsigned long b)205 static 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. */ mask64_if_power2(unsigned long b)211 static inline unsigned long long mask64_if_power2(unsigned long b) 212 { 213 return is_power_of_2(b) ? b - 1 : 0; 214 } 215 216 int 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 DEBUG 223 #define ASSERT(expr) \ 224 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 225 226 #else /* !DEBUG */ 227 228 #ifdef XFS_WARN 229 230 #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 noinline 247 248 #ifdef CONFIG_XFS_RT 249 250 /* 251 * make sure we ignore the inode flag if the filesystem doesn't have a 252 * 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 #else 259 #define XFS_IS_REALTIME_INODE(ip) (0) 260 #define XFS_IS_REALTIME_MOUNT(mp) (0) 261 #endif 262 263 /* 264 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier 265 * prints a hashed version of the pointer to avoid leaking kernel 266 * pointers into dmesg. If we're trying to debug the kernel we want the 267 * raw values, so override this behavior as best we can. 268 */ 269 #ifdef DEBUG 270 # define PTR_FMT "%px" 271 #else 272 # define PTR_FMT "%p" 273 #endif 274 275 /* 276 * Helper for IO routines to grab backing pages from allocated kernel memory. 277 */ 278 static inline struct page * kmem_to_page(void * addr)279 kmem_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