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 #include "xfs_types.h" 36 37 #include "kmem.h" 38 #include "mrlock.h" 39 #include "time.h" 40 #include "uuid.h" 41 42 #include <linux/semaphore.h> 43 #include <linux/mm.h> 44 #include <linux/kernel.h> 45 #include <linux/blkdev.h> 46 #include <linux/slab.h> 47 #include <linux/crc32c.h> 48 #include <linux/module.h> 49 #include <linux/mutex.h> 50 #include <linux/file.h> 51 #include <linux/swap.h> 52 #include <linux/errno.h> 53 #include <linux/sched.h> 54 #include <linux/bitops.h> 55 #include <linux/major.h> 56 #include <linux/pagemap.h> 57 #include <linux/vfs.h> 58 #include <linux/seq_file.h> 59 #include <linux/init.h> 60 #include <linux/list.h> 61 #include <linux/proc_fs.h> 62 #include <linux/sort.h> 63 #include <linux/cpu.h> 64 #include <linux/notifier.h> 65 #include <linux/delay.h> 66 #include <linux/log2.h> 67 #include <linux/spinlock.h> 68 #include <linux/random.h> 69 #include <linux/ctype.h> 70 #include <linux/writeback.h> 71 #include <linux/capability.h> 72 #include <linux/kthread.h> 73 #include <linux/freezer.h> 74 #include <linux/list_sort.h> 75 #include <linux/ratelimit.h> 76 77 #include <asm/page.h> 78 #include <asm/div64.h> 79 #include <asm/param.h> 80 #include <asm/uaccess.h> 81 #include <asm/byteorder.h> 82 #include <asm/unaligned.h> 83 84 #include "xfs_vnode.h" 85 #include "xfs_stats.h" 86 #include "xfs_sysctl.h" 87 #include "xfs_iops.h" 88 #include "xfs_aops.h" 89 #include "xfs_super.h" 90 #include "xfs_buf.h" 91 #include "xfs_message.h" 92 93 #ifdef __BIG_ENDIAN 94 #define XFS_NATIVE_HOST 1 95 #else 96 #undef XFS_NATIVE_HOST 97 #endif 98 99 /* 100 * Feature macros (disable/enable) 101 */ 102 #ifdef CONFIG_SMP 103 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 104 #else 105 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 106 #endif 107 108 #define irix_sgid_inherit xfs_params.sgid_inherit.val 109 #define irix_symlink_mode xfs_params.symlink_mode.val 110 #define xfs_panic_mask xfs_params.panic_mask.val 111 #define xfs_error_level xfs_params.error_level.val 112 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 113 #define xfs_stats_clear xfs_params.stats_clear.val 114 #define xfs_inherit_sync xfs_params.inherit_sync.val 115 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 116 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 117 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val 118 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val 119 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 120 #define xfs_rotorstep xfs_params.rotorstep.val 121 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 122 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 123 #define xfs_eofb_secs xfs_params.eofb_timer.val 124 125 #define current_cpu() (raw_smp_processor_id()) 126 #define current_pid() (current->pid) 127 #define current_test_flags(f) (current->flags & (f)) 128 #define current_set_flags_nested(sp, f) \ 129 (*(sp) = current->flags, current->flags |= (f)) 130 #define current_clear_flags_nested(sp, f) \ 131 (*(sp) = current->flags, current->flags &= ~(f)) 132 #define current_restore_flags_nested(sp, f) \ 133 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 134 135 #define spinlock_destroy(lock) 136 137 #define NBBY 8 /* number of bits per byte */ 138 139 /* 140 * Size of block device i/o is parameterized here. 141 * Currently the system supports page-sized i/o. 142 */ 143 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 144 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 145 /* number of BB's per block device block */ 146 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 147 148 #define ENOATTR ENODATA /* Attribute not found */ 149 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 150 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 151 152 #define SYNCHRONIZE() barrier() 153 #define __return_address __builtin_return_address(0) 154 155 #define XFS_PROJID_DEFAULT 0 156 #define MAXPATHLEN 1024 157 158 #define MIN(a,b) (min(a,b)) 159 #define MAX(a,b) (max(a,b)) 160 #define howmany(x, y) (((x)+((y)-1))/(y)) 161 162 /* 163 * Various platform dependent calls that don't fit anywhere else 164 */ 165 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 166 #define xfs_stack_trace() dump_stack() 167 168 169 /* Move the kernel do_div definition off to one side */ 170 171 #if defined __i386__ 172 /* For ia32 we need to pull some tricks to get past various versions 173 * of the compiler which do not like us using do_div in the middle 174 * of large functions. 175 */ 176 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 177 { 178 __u32 mod; 179 180 switch (n) { 181 case 4: 182 mod = *(__u32 *)a % b; 183 *(__u32 *)a = *(__u32 *)a / b; 184 return mod; 185 case 8: 186 { 187 unsigned long __upper, __low, __high, __mod; 188 __u64 c = *(__u64 *)a; 189 __upper = __high = c >> 32; 190 __low = c; 191 if (__high) { 192 __upper = __high % (b); 193 __high = __high / (b); 194 } 195 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 196 asm("":"=A" (c):"a" (__low),"d" (__high)); 197 *(__u64 *)a = c; 198 return __mod; 199 } 200 } 201 202 /* NOTREACHED */ 203 return 0; 204 } 205 206 /* Side effect free 64 bit mod operation */ 207 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 208 { 209 switch (n) { 210 case 4: 211 return *(__u32 *)a % b; 212 case 8: 213 { 214 unsigned long __upper, __low, __high, __mod; 215 __u64 c = *(__u64 *)a; 216 __upper = __high = c >> 32; 217 __low = c; 218 if (__high) { 219 __upper = __high % (b); 220 __high = __high / (b); 221 } 222 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 223 asm("":"=A" (c):"a" (__low),"d" (__high)); 224 return __mod; 225 } 226 } 227 228 /* NOTREACHED */ 229 return 0; 230 } 231 #else 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 mod = do_div(*(__u64 *)a, b); 243 return mod; 244 } 245 246 /* NOTREACHED */ 247 return 0; 248 } 249 250 /* Side effect free 64 bit mod operation */ 251 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 252 { 253 switch (n) { 254 case 4: 255 return *(__u32 *)a % b; 256 case 8: 257 { 258 __u64 c = *(__u64 *)a; 259 return do_div(c, b); 260 } 261 } 262 263 /* NOTREACHED */ 264 return 0; 265 } 266 #endif 267 268 #undef do_div 269 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 270 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 271 272 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 273 { 274 x += y - 1; 275 do_div(x, y); 276 return(x * y); 277 } 278 279 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 280 { 281 x += y - 1; 282 do_div(x, y); 283 return x; 284 } 285 286 /* ARM old ABI has some weird alignment/padding */ 287 #if defined(__arm__) && !defined(__ARM_EABI__) 288 #define __arch_pack __attribute__((packed)) 289 #else 290 #define __arch_pack 291 #endif 292 293 #define ASSERT_ALWAYS(expr) \ 294 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 295 296 #ifdef DEBUG 297 #define ASSERT(expr) \ 298 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 299 300 #ifndef STATIC 301 # define STATIC noinline 302 #endif 303 304 #else /* !DEBUG */ 305 306 #ifdef XFS_WARN 307 308 #define ASSERT(expr) \ 309 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 310 311 #ifndef STATIC 312 # define STATIC static noinline 313 #endif 314 315 #else /* !DEBUG && !XFS_WARN */ 316 317 #define ASSERT(expr) ((void)0) 318 319 #ifndef STATIC 320 # define STATIC static noinline 321 #endif 322 323 #endif /* XFS_WARN */ 324 #endif /* DEBUG */ 325 326 #endif /* __XFS_LINUX__ */ 327