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_buf.h" 123 #include "xfs_message.h" 124 125 #ifdef __BIG_ENDIAN 126 #define XFS_NATIVE_HOST 1 127 #else 128 #undef XFS_NATIVE_HOST 129 #endif 130 131 /* 132 * Feature macros (disable/enable) 133 */ 134 #ifdef CONFIG_SMP 135 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 136 #else 137 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 138 #endif 139 140 #define irix_sgid_inherit xfs_params.sgid_inherit.val 141 #define irix_symlink_mode xfs_params.symlink_mode.val 142 #define xfs_panic_mask xfs_params.panic_mask.val 143 #define xfs_error_level xfs_params.error_level.val 144 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 145 #define xfs_stats_clear xfs_params.stats_clear.val 146 #define xfs_inherit_sync xfs_params.inherit_sync.val 147 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 148 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 149 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 150 #define xfs_rotorstep xfs_params.rotorstep.val 151 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 152 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 153 #define xfs_eofb_secs xfs_params.eofb_timer.val 154 155 #define current_cpu() (raw_smp_processor_id()) 156 #define current_pid() (current->pid) 157 #define current_test_flags(f) (current->flags & (f)) 158 #define current_set_flags_nested(sp, f) \ 159 (*(sp) = current->flags, current->flags |= (f)) 160 #define current_clear_flags_nested(sp, f) \ 161 (*(sp) = current->flags, current->flags &= ~(f)) 162 #define current_restore_flags_nested(sp, f) \ 163 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 164 165 #define spinlock_destroy(lock) 166 167 #define NBBY 8 /* number of bits per byte */ 168 169 /* 170 * Size of block device i/o is parameterized here. 171 * Currently the system supports page-sized i/o. 172 */ 173 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 174 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 175 /* number of BB's per block device block */ 176 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 177 178 #define ENOATTR ENODATA /* Attribute not found */ 179 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 180 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 181 182 #define SYNCHRONIZE() barrier() 183 #define __return_address __builtin_return_address(0) 184 185 #define XFS_PROJID_DEFAULT 0 186 #define MAXPATHLEN 1024 187 188 #define MIN(a,b) (min(a,b)) 189 #define MAX(a,b) (max(a,b)) 190 #define howmany(x, y) (((x)+((y)-1))/(y)) 191 192 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 193 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 194 * The conversion here is type only, the value will remain the same since we 195 * are converting to the init_user_ns. The uid is later mapped to a particular 196 * user namespace value when crossing the kernel/user boundary. 197 */ 198 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 199 { 200 return from_kuid(&init_user_ns, uid); 201 } 202 203 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 204 { 205 return make_kuid(&init_user_ns, uid); 206 } 207 208 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 209 { 210 return from_kgid(&init_user_ns, gid); 211 } 212 213 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 214 { 215 return make_kgid(&init_user_ns, gid); 216 } 217 218 /* 219 * Various platform dependent calls that don't fit anywhere else 220 */ 221 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 222 #define xfs_stack_trace() dump_stack() 223 224 225 /* Move the kernel do_div definition off to one side */ 226 227 #if defined __i386__ 228 /* For ia32 we need to pull some tricks to get past various versions 229 * of the compiler which do not like us using do_div in the middle 230 * of large functions. 231 */ 232 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 233 { 234 __u32 mod; 235 236 switch (n) { 237 case 4: 238 mod = *(__u32 *)a % b; 239 *(__u32 *)a = *(__u32 *)a / b; 240 return mod; 241 case 8: 242 { 243 unsigned long __upper, __low, __high, __mod; 244 __u64 c = *(__u64 *)a; 245 __upper = __high = c >> 32; 246 __low = c; 247 if (__high) { 248 __upper = __high % (b); 249 __high = __high / (b); 250 } 251 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 252 asm("":"=A" (c):"a" (__low),"d" (__high)); 253 *(__u64 *)a = c; 254 return __mod; 255 } 256 } 257 258 /* NOTREACHED */ 259 return 0; 260 } 261 262 /* Side effect free 64 bit mod operation */ 263 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 264 { 265 switch (n) { 266 case 4: 267 return *(__u32 *)a % b; 268 case 8: 269 { 270 unsigned long __upper, __low, __high, __mod; 271 __u64 c = *(__u64 *)a; 272 __upper = __high = c >> 32; 273 __low = c; 274 if (__high) { 275 __upper = __high % (b); 276 __high = __high / (b); 277 } 278 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 279 asm("":"=A" (c):"a" (__low),"d" (__high)); 280 return __mod; 281 } 282 } 283 284 /* NOTREACHED */ 285 return 0; 286 } 287 #else 288 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 289 { 290 __u32 mod; 291 292 switch (n) { 293 case 4: 294 mod = *(__u32 *)a % b; 295 *(__u32 *)a = *(__u32 *)a / b; 296 return mod; 297 case 8: 298 mod = do_div(*(__u64 *)a, b); 299 return mod; 300 } 301 302 /* NOTREACHED */ 303 return 0; 304 } 305 306 /* Side effect free 64 bit mod operation */ 307 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 308 { 309 switch (n) { 310 case 4: 311 return *(__u32 *)a % b; 312 case 8: 313 { 314 __u64 c = *(__u64 *)a; 315 return do_div(c, b); 316 } 317 } 318 319 /* NOTREACHED */ 320 return 0; 321 } 322 #endif 323 324 #undef do_div 325 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 326 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 327 328 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 329 { 330 x += y - 1; 331 do_div(x, y); 332 return(x * y); 333 } 334 335 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 336 { 337 x += y - 1; 338 do_div(x, y); 339 return x; 340 } 341 342 /* ARM old ABI has some weird alignment/padding */ 343 #if defined(__arm__) && !defined(__ARM_EABI__) 344 #define __arch_pack __attribute__((packed)) 345 #else 346 #define __arch_pack 347 #endif 348 349 #define ASSERT_ALWAYS(expr) \ 350 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 351 352 #ifdef DEBUG 353 #define ASSERT(expr) \ 354 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 355 356 #ifndef STATIC 357 # define STATIC noinline 358 #endif 359 360 #else /* !DEBUG */ 361 362 #ifdef XFS_WARN 363 364 #define ASSERT(expr) \ 365 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 366 367 #ifndef STATIC 368 # define STATIC static noinline 369 #endif 370 371 #else /* !DEBUG && !XFS_WARN */ 372 373 #define ASSERT(expr) ((void)0) 374 375 #ifndef STATIC 376 # define STATIC static noinline 377 #endif 378 379 #endif /* XFS_WARN */ 380 #endif /* DEBUG */ 381 382 #endif /* __XFS_LINUX__ */ 383