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 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits. 25 * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set. 26 */ 27 #if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64) 28 # define XFS_BIG_BLKNOS 1 29 # define XFS_BIG_INUMS 1 30 #else 31 # define XFS_BIG_BLKNOS 0 32 # define XFS_BIG_INUMS 0 33 #endif 34 35 /* 36 * Kernel specific type declarations for XFS 37 */ 38 typedef signed char __int8_t; 39 typedef unsigned char __uint8_t; 40 typedef signed short int __int16_t; 41 typedef unsigned short int __uint16_t; 42 typedef signed int __int32_t; 43 typedef unsigned int __uint32_t; 44 typedef signed long long int __int64_t; 45 typedef unsigned long long int __uint64_t; 46 47 typedef __uint32_t inst_t; /* an instruction */ 48 49 typedef __s64 xfs_off_t; /* <file offset> type */ 50 typedef unsigned long long xfs_ino_t; /* <inode> type */ 51 typedef __s64 xfs_daddr_t; /* <disk address> type */ 52 typedef char * xfs_caddr_t; /* <core address> type */ 53 typedef __u32 xfs_dev_t; 54 typedef __u32 xfs_nlink_t; 55 56 /* __psint_t is the same size as a pointer */ 57 #if (BITS_PER_LONG == 32) 58 typedef __int32_t __psint_t; 59 typedef __uint32_t __psunsigned_t; 60 #elif (BITS_PER_LONG == 64) 61 typedef __int64_t __psint_t; 62 typedef __uint64_t __psunsigned_t; 63 #else 64 #error BITS_PER_LONG must be 32 or 64 65 #endif 66 67 #include "xfs_types.h" 68 69 #include "kmem.h" 70 #include "mrlock.h" 71 #include "time.h" 72 #include "uuid.h" 73 74 #include <linux/semaphore.h> 75 #include <linux/mm.h> 76 #include <linux/kernel.h> 77 #include <linux/blkdev.h> 78 #include <linux/slab.h> 79 #include <linux/crc32c.h> 80 #include <linux/module.h> 81 #include <linux/mutex.h> 82 #include <linux/file.h> 83 #include <linux/swap.h> 84 #include <linux/errno.h> 85 #include <linux/sched.h> 86 #include <linux/bitops.h> 87 #include <linux/major.h> 88 #include <linux/pagemap.h> 89 #include <linux/vfs.h> 90 #include <linux/seq_file.h> 91 #include <linux/init.h> 92 #include <linux/list.h> 93 #include <linux/proc_fs.h> 94 #include <linux/sort.h> 95 #include <linux/cpu.h> 96 #include <linux/notifier.h> 97 #include <linux/delay.h> 98 #include <linux/log2.h> 99 #include <linux/spinlock.h> 100 #include <linux/random.h> 101 #include <linux/ctype.h> 102 #include <linux/writeback.h> 103 #include <linux/capability.h> 104 #include <linux/kthread.h> 105 #include <linux/freezer.h> 106 #include <linux/list_sort.h> 107 #include <linux/ratelimit.h> 108 109 #include <asm/page.h> 110 #include <asm/div64.h> 111 #include <asm/param.h> 112 #include <asm/uaccess.h> 113 #include <asm/byteorder.h> 114 #include <asm/unaligned.h> 115 116 #include "xfs_vnode.h" 117 #include "xfs_stats.h" 118 #include "xfs_sysctl.h" 119 #include "xfs_iops.h" 120 #include "xfs_aops.h" 121 #include "xfs_super.h" 122 #include "xfs_cksum.h" 123 #include "xfs_buf.h" 124 #include "xfs_message.h" 125 126 #ifdef __BIG_ENDIAN 127 #define XFS_NATIVE_HOST 1 128 #else 129 #undef XFS_NATIVE_HOST 130 #endif 131 132 /* 133 * Feature macros (disable/enable) 134 */ 135 #ifdef CONFIG_SMP 136 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 137 #else 138 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 139 #endif 140 141 #define irix_sgid_inherit xfs_params.sgid_inherit.val 142 #define irix_symlink_mode xfs_params.symlink_mode.val 143 #define xfs_panic_mask xfs_params.panic_mask.val 144 #define xfs_error_level xfs_params.error_level.val 145 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 146 #define xfs_stats_clear xfs_params.stats_clear.val 147 #define xfs_inherit_sync xfs_params.inherit_sync.val 148 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 149 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 150 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 151 #define xfs_rotorstep xfs_params.rotorstep.val 152 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 153 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 154 #define xfs_eofb_secs xfs_params.eofb_timer.val 155 156 #define current_cpu() (raw_smp_processor_id()) 157 #define current_pid() (current->pid) 158 #define current_test_flags(f) (current->flags & (f)) 159 #define current_set_flags_nested(sp, f) \ 160 (*(sp) = current->flags, current->flags |= (f)) 161 #define current_clear_flags_nested(sp, f) \ 162 (*(sp) = current->flags, current->flags &= ~(f)) 163 #define current_restore_flags_nested(sp, f) \ 164 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 165 166 #define spinlock_destroy(lock) 167 168 #define NBBY 8 /* number of bits per byte */ 169 170 /* 171 * Size of block device i/o is parameterized here. 172 * Currently the system supports page-sized i/o. 173 */ 174 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 175 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 176 /* number of BB's per block device block */ 177 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 178 179 #define ENOATTR ENODATA /* Attribute not found */ 180 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 181 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 182 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 183 184 #define SYNCHRONIZE() barrier() 185 #define __return_address __builtin_return_address(0) 186 187 #define XFS_PROJID_DEFAULT 0 188 #define MAXPATHLEN 1024 189 190 #define MIN(a,b) (min(a,b)) 191 #define MAX(a,b) (max(a,b)) 192 #define howmany(x, y) (((x)+((y)-1))/(y)) 193 194 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 195 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 196 * The conversion here is type only, the value will remain the same since we 197 * are converting to the init_user_ns. The uid is later mapped to a particular 198 * user namespace value when crossing the kernel/user boundary. 199 */ 200 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 201 { 202 return from_kuid(&init_user_ns, uid); 203 } 204 205 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 206 { 207 return make_kuid(&init_user_ns, uid); 208 } 209 210 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 211 { 212 return from_kgid(&init_user_ns, gid); 213 } 214 215 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 216 { 217 return make_kgid(&init_user_ns, gid); 218 } 219 220 /* 221 * Various platform dependent calls that don't fit anywhere else 222 */ 223 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 224 #define xfs_stack_trace() dump_stack() 225 226 227 /* Move the kernel do_div definition off to one side */ 228 229 #if defined __i386__ 230 /* For ia32 we need to pull some tricks to get past various versions 231 * of the compiler which do not like us using do_div in the middle 232 * of large functions. 233 */ 234 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 235 { 236 __u32 mod; 237 238 switch (n) { 239 case 4: 240 mod = *(__u32 *)a % b; 241 *(__u32 *)a = *(__u32 *)a / b; 242 return mod; 243 case 8: 244 { 245 unsigned long __upper, __low, __high, __mod; 246 __u64 c = *(__u64 *)a; 247 __upper = __high = c >> 32; 248 __low = c; 249 if (__high) { 250 __upper = __high % (b); 251 __high = __high / (b); 252 } 253 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 254 asm("":"=A" (c):"a" (__low),"d" (__high)); 255 *(__u64 *)a = c; 256 return __mod; 257 } 258 } 259 260 /* NOTREACHED */ 261 return 0; 262 } 263 264 /* Side effect free 64 bit mod operation */ 265 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 266 { 267 switch (n) { 268 case 4: 269 return *(__u32 *)a % b; 270 case 8: 271 { 272 unsigned long __upper, __low, __high, __mod; 273 __u64 c = *(__u64 *)a; 274 __upper = __high = c >> 32; 275 __low = c; 276 if (__high) { 277 __upper = __high % (b); 278 __high = __high / (b); 279 } 280 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 281 asm("":"=A" (c):"a" (__low),"d" (__high)); 282 return __mod; 283 } 284 } 285 286 /* NOTREACHED */ 287 return 0; 288 } 289 #else 290 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 291 { 292 __u32 mod; 293 294 switch (n) { 295 case 4: 296 mod = *(__u32 *)a % b; 297 *(__u32 *)a = *(__u32 *)a / b; 298 return mod; 299 case 8: 300 mod = do_div(*(__u64 *)a, b); 301 return mod; 302 } 303 304 /* NOTREACHED */ 305 return 0; 306 } 307 308 /* Side effect free 64 bit mod operation */ 309 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 310 { 311 switch (n) { 312 case 4: 313 return *(__u32 *)a % b; 314 case 8: 315 { 316 __u64 c = *(__u64 *)a; 317 return do_div(c, b); 318 } 319 } 320 321 /* NOTREACHED */ 322 return 0; 323 } 324 #endif 325 326 #undef do_div 327 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 328 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 329 330 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 331 { 332 x += y - 1; 333 do_div(x, y); 334 return(x * y); 335 } 336 337 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 338 { 339 x += y - 1; 340 do_div(x, y); 341 return x; 342 } 343 344 /* ARM old ABI has some weird alignment/padding */ 345 #if defined(__arm__) && !defined(__ARM_EABI__) 346 #define __arch_pack __attribute__((packed)) 347 #else 348 #define __arch_pack 349 #endif 350 351 #define ASSERT_ALWAYS(expr) \ 352 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 353 354 #ifdef DEBUG 355 #define ASSERT(expr) \ 356 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 357 358 #ifndef STATIC 359 # define STATIC noinline 360 #endif 361 362 #else /* !DEBUG */ 363 364 #ifdef XFS_WARN 365 366 #define ASSERT(expr) \ 367 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 368 369 #ifndef STATIC 370 # define STATIC static noinline 371 #endif 372 373 #else /* !DEBUG && !XFS_WARN */ 374 375 #define ASSERT(expr) ((void)0) 376 377 #ifndef STATIC 378 # define STATIC static noinline 379 #endif 380 381 #endif /* XFS_WARN */ 382 #endif /* DEBUG */ 383 384 #endif /* __XFS_LINUX__ */ 385