1 /* 2 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_LINUX__ 19 #define __XFS_LINUX__ 20 21 #include <linux/types.h> 22 23 /* 24 * Kernel specific type declarations for XFS 25 */ 26 typedef signed char __int8_t; 27 typedef unsigned char __uint8_t; 28 typedef signed short int __int16_t; 29 typedef unsigned short int __uint16_t; 30 typedef signed int __int32_t; 31 typedef unsigned int __uint32_t; 32 typedef signed long long int __int64_t; 33 typedef unsigned long long int __uint64_t; 34 35 typedef __s64 xfs_off_t; /* <file offset> type */ 36 typedef unsigned long long xfs_ino_t; /* <inode> type */ 37 typedef __s64 xfs_daddr_t; /* <disk address> type */ 38 typedef __u32 xfs_dev_t; 39 typedef __u32 xfs_nlink_t; 40 41 #include "xfs_types.h" 42 43 #include "kmem.h" 44 #include "mrlock.h" 45 #include "uuid.h" 46 47 #include <linux/semaphore.h> 48 #include <linux/mm.h> 49 #include <linux/kernel.h> 50 #include <linux/blkdev.h> 51 #include <linux/slab.h> 52 #include <linux/crc32c.h> 53 #include <linux/module.h> 54 #include <linux/mutex.h> 55 #include <linux/file.h> 56 #include <linux/swap.h> 57 #include <linux/errno.h> 58 #include <linux/sched/signal.h> 59 #include <linux/bitops.h> 60 #include <linux/major.h> 61 #include <linux/pagemap.h> 62 #include <linux/vfs.h> 63 #include <linux/seq_file.h> 64 #include <linux/init.h> 65 #include <linux/list.h> 66 #include <linux/proc_fs.h> 67 #include <linux/sort.h> 68 #include <linux/cpu.h> 69 #include <linux/notifier.h> 70 #include <linux/delay.h> 71 #include <linux/log2.h> 72 #include <linux/spinlock.h> 73 #include <linux/random.h> 74 #include <linux/ctype.h> 75 #include <linux/writeback.h> 76 #include <linux/capability.h> 77 #include <linux/kthread.h> 78 #include <linux/freezer.h> 79 #include <linux/list_sort.h> 80 #include <linux/ratelimit.h> 81 #include <linux/rhashtable.h> 82 83 #include <asm/page.h> 84 #include <asm/div64.h> 85 #include <asm/param.h> 86 #include <linux/uaccess.h> 87 #include <asm/byteorder.h> 88 #include <asm/unaligned.h> 89 90 #include "xfs_fs.h" 91 #include "xfs_stats.h" 92 #include "xfs_sysctl.h" 93 #include "xfs_iops.h" 94 #include "xfs_aops.h" 95 #include "xfs_super.h" 96 #include "xfs_cksum.h" 97 #include "xfs_buf.h" 98 #include "xfs_message.h" 99 100 #ifdef __BIG_ENDIAN 101 #define XFS_NATIVE_HOST 1 102 #else 103 #undef XFS_NATIVE_HOST 104 #endif 105 106 #define irix_sgid_inherit xfs_params.sgid_inherit.val 107 #define irix_symlink_mode xfs_params.symlink_mode.val 108 #define xfs_panic_mask xfs_params.panic_mask.val 109 #define xfs_error_level xfs_params.error_level.val 110 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 111 #define xfs_stats_clear xfs_params.stats_clear.val 112 #define xfs_inherit_sync xfs_params.inherit_sync.val 113 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 114 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 115 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 116 #define xfs_rotorstep xfs_params.rotorstep.val 117 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 118 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 119 #define xfs_eofb_secs xfs_params.eofb_timer.val 120 #define xfs_cowb_secs xfs_params.cowb_timer.val 121 122 #define current_cpu() (raw_smp_processor_id()) 123 #define current_pid() (current->pid) 124 #define current_test_flags(f) (current->flags & (f)) 125 #define current_set_flags_nested(sp, f) \ 126 (*(sp) = current->flags, current->flags |= (f)) 127 #define current_clear_flags_nested(sp, f) \ 128 (*(sp) = current->flags, current->flags &= ~(f)) 129 #define current_restore_flags_nested(sp, f) \ 130 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 131 132 #define spinlock_destroy(lock) 133 134 #define NBBY 8 /* number of bits per byte */ 135 136 /* 137 * Size of block device i/o is parameterized here. 138 * Currently the system supports page-sized i/o. 139 */ 140 #define BLKDEV_IOSHIFT PAGE_SHIFT 141 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 142 /* number of BB's per block device block */ 143 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 144 145 #define ENOATTR ENODATA /* Attribute not found */ 146 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 147 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 148 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 149 150 #define SYNCHRONIZE() barrier() 151 #define __return_address __builtin_return_address(0) 152 153 #define XFS_PROJID_DEFAULT 0 154 #define MAXPATHLEN 1024 155 156 #define MIN(a,b) (min(a,b)) 157 #define MAX(a,b) (max(a,b)) 158 #define howmany(x, y) (((x)+((y)-1))/(y)) 159 160 static inline void delay(long ticks) 161 { 162 schedule_timeout_uninterruptible(ticks); 163 } 164 165 /* 166 * XFS wrapper structure for sysfs support. It depends on external data 167 * structures and is embedded in various internal data structures to implement 168 * the XFS sysfs object heirarchy. Define it here for broad access throughout 169 * the codebase. 170 */ 171 struct xfs_kobj { 172 struct kobject kobject; 173 struct completion complete; 174 }; 175 176 struct xstats { 177 struct xfsstats __percpu *xs_stats; 178 struct xfs_kobj xs_kobj; 179 }; 180 181 extern struct xstats xfsstats; 182 183 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 184 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 185 * The conversion here is type only, the value will remain the same since we 186 * are converting to the init_user_ns. The uid is later mapped to a particular 187 * user namespace value when crossing the kernel/user boundary. 188 */ 189 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 190 { 191 return from_kuid(&init_user_ns, uid); 192 } 193 194 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 195 { 196 return make_kuid(&init_user_ns, uid); 197 } 198 199 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 200 { 201 return from_kgid(&init_user_ns, gid); 202 } 203 204 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 205 { 206 return make_kgid(&init_user_ns, gid); 207 } 208 209 /* 210 * Various platform dependent calls that don't fit anywhere else 211 */ 212 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 213 #define xfs_stack_trace() dump_stack() 214 215 216 /* Move the kernel do_div definition off to one side */ 217 218 #if defined __i386__ 219 /* For ia32 we need to pull some tricks to get past various versions 220 * of the compiler which do not like us using do_div in the middle 221 * of large functions. 222 */ 223 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 224 { 225 __u32 mod; 226 227 switch (n) { 228 case 4: 229 mod = *(__u32 *)a % b; 230 *(__u32 *)a = *(__u32 *)a / b; 231 return mod; 232 case 8: 233 { 234 unsigned long __upper, __low, __high, __mod; 235 __u64 c = *(__u64 *)a; 236 __upper = __high = c >> 32; 237 __low = c; 238 if (__high) { 239 __upper = __high % (b); 240 __high = __high / (b); 241 } 242 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 243 asm("":"=A" (c):"a" (__low),"d" (__high)); 244 *(__u64 *)a = c; 245 return __mod; 246 } 247 } 248 249 /* NOTREACHED */ 250 return 0; 251 } 252 253 /* Side effect free 64 bit mod operation */ 254 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 255 { 256 switch (n) { 257 case 4: 258 return *(__u32 *)a % b; 259 case 8: 260 { 261 unsigned long __upper, __low, __high, __mod; 262 __u64 c = *(__u64 *)a; 263 __upper = __high = c >> 32; 264 __low = c; 265 if (__high) { 266 __upper = __high % (b); 267 __high = __high / (b); 268 } 269 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 270 asm("":"=A" (c):"a" (__low),"d" (__high)); 271 return __mod; 272 } 273 } 274 275 /* NOTREACHED */ 276 return 0; 277 } 278 #else 279 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 280 { 281 __u32 mod; 282 283 switch (n) { 284 case 4: 285 mod = *(__u32 *)a % b; 286 *(__u32 *)a = *(__u32 *)a / b; 287 return mod; 288 case 8: 289 mod = do_div(*(__u64 *)a, b); 290 return mod; 291 } 292 293 /* NOTREACHED */ 294 return 0; 295 } 296 297 /* Side effect free 64 bit mod operation */ 298 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 299 { 300 switch (n) { 301 case 4: 302 return *(__u32 *)a % b; 303 case 8: 304 { 305 __u64 c = *(__u64 *)a; 306 return do_div(c, b); 307 } 308 } 309 310 /* NOTREACHED */ 311 return 0; 312 } 313 #endif 314 315 #undef do_div 316 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 317 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 318 319 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 320 { 321 x += y - 1; 322 do_div(x, y); 323 return x * y; 324 } 325 326 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 327 { 328 x += y - 1; 329 do_div(x, y); 330 return x; 331 } 332 333 #define ASSERT_ALWAYS(expr) \ 334 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 335 336 #ifdef DEBUG 337 #define ASSERT(expr) \ 338 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 339 340 #ifndef STATIC 341 # define STATIC noinline 342 #endif 343 344 #else /* !DEBUG */ 345 346 #ifdef XFS_WARN 347 348 #define ASSERT(expr) \ 349 (likely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 350 351 #ifndef STATIC 352 # define STATIC static noinline 353 #endif 354 355 #else /* !DEBUG && !XFS_WARN */ 356 357 #define ASSERT(expr) ((void)0) 358 359 #ifndef STATIC 360 # define STATIC static noinline 361 #endif 362 363 #endif /* XFS_WARN */ 364 #endif /* DEBUG */ 365 366 #ifdef CONFIG_XFS_RT 367 #define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) 368 #else 369 #define XFS_IS_REALTIME_INODE(ip) (0) 370 #endif 371 372 #endif /* __XFS_LINUX__ */ 373