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 __uint32_t inst_t; /* an instruction */ 36 37 typedef __s64 xfs_off_t; /* <file offset> type */ 38 typedef unsigned long long xfs_ino_t; /* <inode> type */ 39 typedef __s64 xfs_daddr_t; /* <disk address> type */ 40 typedef char * xfs_caddr_t; /* <core address> type */ 41 typedef __u32 xfs_dev_t; 42 typedef __u32 xfs_nlink_t; 43 44 /* __psint_t is the same size as a pointer */ 45 #if (BITS_PER_LONG == 32) 46 typedef __int32_t __psint_t; 47 typedef __uint32_t __psunsigned_t; 48 #elif (BITS_PER_LONG == 64) 49 typedef __int64_t __psint_t; 50 typedef __uint64_t __psunsigned_t; 51 #else 52 #error BITS_PER_LONG must be 32 or 64 53 #endif 54 55 #include "xfs_types.h" 56 57 #include "kmem.h" 58 #include "mrlock.h" 59 #include "time.h" 60 #include "uuid.h" 61 62 #include <linux/semaphore.h> 63 #include <linux/mm.h> 64 #include <linux/kernel.h> 65 #include <linux/blkdev.h> 66 #include <linux/slab.h> 67 #include <linux/crc32c.h> 68 #include <linux/module.h> 69 #include <linux/mutex.h> 70 #include <linux/file.h> 71 #include <linux/swap.h> 72 #include <linux/errno.h> 73 #include <linux/sched.h> 74 #include <linux/bitops.h> 75 #include <linux/major.h> 76 #include <linux/pagemap.h> 77 #include <linux/vfs.h> 78 #include <linux/seq_file.h> 79 #include <linux/init.h> 80 #include <linux/list.h> 81 #include <linux/proc_fs.h> 82 #include <linux/sort.h> 83 #include <linux/cpu.h> 84 #include <linux/notifier.h> 85 #include <linux/delay.h> 86 #include <linux/log2.h> 87 #include <linux/spinlock.h> 88 #include <linux/random.h> 89 #include <linux/ctype.h> 90 #include <linux/writeback.h> 91 #include <linux/capability.h> 92 #include <linux/kthread.h> 93 #include <linux/freezer.h> 94 #include <linux/list_sort.h> 95 #include <linux/ratelimit.h> 96 97 #include <asm/page.h> 98 #include <asm/div64.h> 99 #include <asm/param.h> 100 #include <asm/uaccess.h> 101 #include <asm/byteorder.h> 102 #include <asm/unaligned.h> 103 104 #include "xfs_fs.h" 105 #include "xfs_stats.h" 106 #include "xfs_sysctl.h" 107 #include "xfs_iops.h" 108 #include "xfs_aops.h" 109 #include "xfs_super.h" 110 #include "xfs_cksum.h" 111 #include "xfs_buf.h" 112 #include "xfs_message.h" 113 114 #ifdef __BIG_ENDIAN 115 #define XFS_NATIVE_HOST 1 116 #else 117 #undef XFS_NATIVE_HOST 118 #endif 119 120 /* 121 * Feature macros (disable/enable) 122 */ 123 #ifdef CONFIG_SMP 124 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 125 #else 126 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 127 #endif 128 129 #define irix_sgid_inherit xfs_params.sgid_inherit.val 130 #define irix_symlink_mode xfs_params.symlink_mode.val 131 #define xfs_panic_mask xfs_params.panic_mask.val 132 #define xfs_error_level xfs_params.error_level.val 133 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 134 #define xfs_stats_clear xfs_params.stats_clear.val 135 #define xfs_inherit_sync xfs_params.inherit_sync.val 136 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 137 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 138 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 139 #define xfs_rotorstep xfs_params.rotorstep.val 140 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 141 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 142 #define xfs_eofb_secs xfs_params.eofb_timer.val 143 144 #define current_cpu() (raw_smp_processor_id()) 145 #define current_pid() (current->pid) 146 #define current_test_flags(f) (current->flags & (f)) 147 #define current_set_flags_nested(sp, f) \ 148 (*(sp) = current->flags, current->flags |= (f)) 149 #define current_clear_flags_nested(sp, f) \ 150 (*(sp) = current->flags, current->flags &= ~(f)) 151 #define current_restore_flags_nested(sp, f) \ 152 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 153 154 #define spinlock_destroy(lock) 155 156 #define NBBY 8 /* number of bits per byte */ 157 158 /* 159 * Size of block device i/o is parameterized here. 160 * Currently the system supports page-sized i/o. 161 */ 162 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 163 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 164 /* number of BB's per block device block */ 165 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 166 167 #define ENOATTR ENODATA /* Attribute not found */ 168 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 169 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 170 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 171 172 #define SYNCHRONIZE() barrier() 173 #define __return_address __builtin_return_address(0) 174 175 #define XFS_PROJID_DEFAULT 0 176 #define MAXPATHLEN 1024 177 178 #define MIN(a,b) (min(a,b)) 179 #define MAX(a,b) (max(a,b)) 180 #define howmany(x, y) (((x)+((y)-1))/(y)) 181 182 /* 183 * XFS wrapper structure for sysfs support. It depends on external data 184 * structures and is embedded in various internal data structures to implement 185 * the XFS sysfs object heirarchy. Define it here for broad access throughout 186 * the codebase. 187 */ 188 struct xfs_kobj { 189 struct kobject kobject; 190 struct completion complete; 191 }; 192 193 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 194 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 195 * The conversion here is type only, the value will remain the same since we 196 * are converting to the init_user_ns. The uid is later mapped to a particular 197 * user namespace value when crossing the kernel/user boundary. 198 */ 199 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 200 { 201 return from_kuid(&init_user_ns, uid); 202 } 203 204 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 205 { 206 return make_kuid(&init_user_ns, uid); 207 } 208 209 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 210 { 211 return from_kgid(&init_user_ns, gid); 212 } 213 214 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 215 { 216 return make_kgid(&init_user_ns, gid); 217 } 218 219 /* 220 * Various platform dependent calls that don't fit anywhere else 221 */ 222 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 223 #define xfs_stack_trace() dump_stack() 224 225 226 /* Move the kernel do_div definition off to one side */ 227 228 #if defined __i386__ 229 /* For ia32 we need to pull some tricks to get past various versions 230 * of the compiler which do not like us using do_div in the middle 231 * of large functions. 232 */ 233 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 234 { 235 __u32 mod; 236 237 switch (n) { 238 case 4: 239 mod = *(__u32 *)a % b; 240 *(__u32 *)a = *(__u32 *)a / b; 241 return mod; 242 case 8: 243 { 244 unsigned long __upper, __low, __high, __mod; 245 __u64 c = *(__u64 *)a; 246 __upper = __high = c >> 32; 247 __low = c; 248 if (__high) { 249 __upper = __high % (b); 250 __high = __high / (b); 251 } 252 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 253 asm("":"=A" (c):"a" (__low),"d" (__high)); 254 *(__u64 *)a = c; 255 return __mod; 256 } 257 } 258 259 /* NOTREACHED */ 260 return 0; 261 } 262 263 /* Side effect free 64 bit mod operation */ 264 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 265 { 266 switch (n) { 267 case 4: 268 return *(__u32 *)a % b; 269 case 8: 270 { 271 unsigned long __upper, __low, __high, __mod; 272 __u64 c = *(__u64 *)a; 273 __upper = __high = c >> 32; 274 __low = c; 275 if (__high) { 276 __upper = __high % (b); 277 __high = __high / (b); 278 } 279 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 280 asm("":"=A" (c):"a" (__low),"d" (__high)); 281 return __mod; 282 } 283 } 284 285 /* NOTREACHED */ 286 return 0; 287 } 288 #else 289 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 290 { 291 __u32 mod; 292 293 switch (n) { 294 case 4: 295 mod = *(__u32 *)a % b; 296 *(__u32 *)a = *(__u32 *)a / b; 297 return mod; 298 case 8: 299 mod = do_div(*(__u64 *)a, b); 300 return mod; 301 } 302 303 /* NOTREACHED */ 304 return 0; 305 } 306 307 /* Side effect free 64 bit mod operation */ 308 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 309 { 310 switch (n) { 311 case 4: 312 return *(__u32 *)a % b; 313 case 8: 314 { 315 __u64 c = *(__u64 *)a; 316 return do_div(c, b); 317 } 318 } 319 320 /* NOTREACHED */ 321 return 0; 322 } 323 #endif 324 325 #undef do_div 326 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 327 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 328 329 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 330 { 331 x += y - 1; 332 do_div(x, y); 333 return x * y; 334 } 335 336 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 337 { 338 x += y - 1; 339 do_div(x, y); 340 return x; 341 } 342 343 /* ARM old ABI has some weird alignment/padding */ 344 #if defined(__arm__) && !defined(__ARM_EABI__) 345 #define __arch_pack __attribute__((packed)) 346 #else 347 #define __arch_pack 348 #endif 349 350 #define ASSERT_ALWAYS(expr) \ 351 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 352 353 #ifdef DEBUG 354 #define ASSERT(expr) \ 355 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 356 357 #ifndef STATIC 358 # define STATIC noinline 359 #endif 360 361 #else /* !DEBUG */ 362 363 #ifdef XFS_WARN 364 365 #define ASSERT(expr) \ 366 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 367 368 #ifndef STATIC 369 # define STATIC static noinline 370 #endif 371 372 #else /* !DEBUG && !XFS_WARN */ 373 374 #define ASSERT(expr) ((void)0) 375 376 #ifndef STATIC 377 # define STATIC static noinline 378 #endif 379 380 #endif /* XFS_WARN */ 381 #endif /* DEBUG */ 382 383 #endif /* __XFS_LINUX__ */ 384