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/module.h> 48 #include <linux/mutex.h> 49 #include <linux/file.h> 50 #include <linux/swap.h> 51 #include <linux/errno.h> 52 #include <linux/sched.h> 53 #include <linux/bitops.h> 54 #include <linux/major.h> 55 #include <linux/pagemap.h> 56 #include <linux/vfs.h> 57 #include <linux/seq_file.h> 58 #include <linux/init.h> 59 #include <linux/list.h> 60 #include <linux/proc_fs.h> 61 #include <linux/sort.h> 62 #include <linux/cpu.h> 63 #include <linux/notifier.h> 64 #include <linux/delay.h> 65 #include <linux/log2.h> 66 #include <linux/spinlock.h> 67 #include <linux/random.h> 68 #include <linux/ctype.h> 69 #include <linux/writeback.h> 70 #include <linux/capability.h> 71 #include <linux/list_sort.h> 72 73 #include <asm/page.h> 74 #include <asm/div64.h> 75 #include <asm/param.h> 76 #include <asm/uaccess.h> 77 #include <asm/byteorder.h> 78 #include <asm/unaligned.h> 79 80 #include "xfs_vnode.h" 81 #include "xfs_stats.h" 82 #include "xfs_sysctl.h" 83 #include "xfs_iops.h" 84 #include "xfs_aops.h" 85 #include "xfs_super.h" 86 #include "xfs_buf.h" 87 #include "xfs_message.h" 88 89 #ifdef __BIG_ENDIAN 90 #define XFS_NATIVE_HOST 1 91 #else 92 #undef XFS_NATIVE_HOST 93 #endif 94 95 /* 96 * Feature macros (disable/enable) 97 */ 98 #ifdef CONFIG_SMP 99 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 100 #else 101 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 102 #endif 103 104 #define irix_sgid_inherit xfs_params.sgid_inherit.val 105 #define irix_symlink_mode xfs_params.symlink_mode.val 106 #define xfs_panic_mask xfs_params.panic_mask.val 107 #define xfs_error_level xfs_params.error_level.val 108 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 109 #define xfs_stats_clear xfs_params.stats_clear.val 110 #define xfs_inherit_sync xfs_params.inherit_sync.val 111 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 112 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 113 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val 114 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.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 119 120 #define current_cpu() (raw_smp_processor_id()) 121 #define current_pid() (current->pid) 122 #define current_test_flags(f) (current->flags & (f)) 123 #define current_set_flags_nested(sp, f) \ 124 (*(sp) = current->flags, current->flags |= (f)) 125 #define current_clear_flags_nested(sp, f) \ 126 (*(sp) = current->flags, current->flags &= ~(f)) 127 #define current_restore_flags_nested(sp, f) \ 128 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 129 130 #define spinlock_destroy(lock) 131 132 #define NBBY 8 /* number of bits per byte */ 133 134 /* 135 * Size of block device i/o is parameterized here. 136 * Currently the system supports page-sized i/o. 137 */ 138 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 139 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 140 /* number of BB's per block device block */ 141 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 142 143 #define ENOATTR ENODATA /* Attribute not found */ 144 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 145 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 146 147 #define SYNCHRONIZE() barrier() 148 #define __return_address __builtin_return_address(0) 149 150 #define XFS_PROJID_DEFAULT 0 151 #define MAXPATHLEN 1024 152 153 #define MIN(a,b) (min(a,b)) 154 #define MAX(a,b) (max(a,b)) 155 #define howmany(x, y) (((x)+((y)-1))/(y)) 156 157 /* 158 * Various platform dependent calls that don't fit anywhere else 159 */ 160 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 161 #define xfs_stack_trace() dump_stack() 162 163 164 /* Move the kernel do_div definition off to one side */ 165 166 #if defined __i386__ 167 /* For ia32 we need to pull some tricks to get past various versions 168 * of the compiler which do not like us using do_div in the middle 169 * of large functions. 170 */ 171 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 172 { 173 __u32 mod; 174 175 switch (n) { 176 case 4: 177 mod = *(__u32 *)a % b; 178 *(__u32 *)a = *(__u32 *)a / b; 179 return mod; 180 case 8: 181 { 182 unsigned long __upper, __low, __high, __mod; 183 __u64 c = *(__u64 *)a; 184 __upper = __high = c >> 32; 185 __low = c; 186 if (__high) { 187 __upper = __high % (b); 188 __high = __high / (b); 189 } 190 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 191 asm("":"=A" (c):"a" (__low),"d" (__high)); 192 *(__u64 *)a = c; 193 return __mod; 194 } 195 } 196 197 /* NOTREACHED */ 198 return 0; 199 } 200 201 /* Side effect free 64 bit mod operation */ 202 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 203 { 204 switch (n) { 205 case 4: 206 return *(__u32 *)a % b; 207 case 8: 208 { 209 unsigned long __upper, __low, __high, __mod; 210 __u64 c = *(__u64 *)a; 211 __upper = __high = c >> 32; 212 __low = c; 213 if (__high) { 214 __upper = __high % (b); 215 __high = __high / (b); 216 } 217 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 218 asm("":"=A" (c):"a" (__low),"d" (__high)); 219 return __mod; 220 } 221 } 222 223 /* NOTREACHED */ 224 return 0; 225 } 226 #else 227 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 228 { 229 __u32 mod; 230 231 switch (n) { 232 case 4: 233 mod = *(__u32 *)a % b; 234 *(__u32 *)a = *(__u32 *)a / b; 235 return mod; 236 case 8: 237 mod = do_div(*(__u64 *)a, b); 238 return mod; 239 } 240 241 /* NOTREACHED */ 242 return 0; 243 } 244 245 /* Side effect free 64 bit mod operation */ 246 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 247 { 248 switch (n) { 249 case 4: 250 return *(__u32 *)a % b; 251 case 8: 252 { 253 __u64 c = *(__u64 *)a; 254 return do_div(c, b); 255 } 256 } 257 258 /* NOTREACHED */ 259 return 0; 260 } 261 #endif 262 263 #undef do_div 264 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 265 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 266 267 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 268 { 269 x += y - 1; 270 do_div(x, y); 271 return(x * y); 272 } 273 274 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 275 { 276 x += y - 1; 277 do_div(x, y); 278 return x; 279 } 280 281 /* ARM old ABI has some weird alignment/padding */ 282 #if defined(__arm__) && !defined(__ARM_EABI__) 283 #define __arch_pack __attribute__((packed)) 284 #else 285 #define __arch_pack 286 #endif 287 288 #define ASSERT_ALWAYS(expr) \ 289 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 290 291 #ifndef DEBUG 292 #define ASSERT(expr) ((void)0) 293 294 #ifndef STATIC 295 # define STATIC static noinline 296 #endif 297 298 #else /* DEBUG */ 299 300 #define ASSERT(expr) \ 301 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 302 303 #ifndef STATIC 304 # define STATIC noinline 305 #endif 306 307 #endif /* DEBUG */ 308 309 #endif /* __XFS_LINUX__ */ 310