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 76 #include <asm/page.h> 77 #include <asm/div64.h> 78 #include <asm/param.h> 79 #include <asm/uaccess.h> 80 #include <asm/byteorder.h> 81 #include <asm/unaligned.h> 82 83 #include "xfs_vnode.h" 84 #include "xfs_stats.h" 85 #include "xfs_sysctl.h" 86 #include "xfs_iops.h" 87 #include "xfs_aops.h" 88 #include "xfs_super.h" 89 #include "xfs_buf.h" 90 #include "xfs_message.h" 91 92 #ifdef __BIG_ENDIAN 93 #define XFS_NATIVE_HOST 1 94 #else 95 #undef XFS_NATIVE_HOST 96 #endif 97 98 /* 99 * Feature macros (disable/enable) 100 */ 101 #ifdef CONFIG_SMP 102 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 103 #else 104 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 105 #endif 106 107 #define irix_sgid_inherit xfs_params.sgid_inherit.val 108 #define irix_symlink_mode xfs_params.symlink_mode.val 109 #define xfs_panic_mask xfs_params.panic_mask.val 110 #define xfs_error_level xfs_params.error_level.val 111 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 112 #define xfs_stats_clear xfs_params.stats_clear.val 113 #define xfs_inherit_sync xfs_params.inherit_sync.val 114 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 115 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 116 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val 117 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val 118 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 119 #define xfs_rotorstep xfs_params.rotorstep.val 120 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 121 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 122 #define xfs_eofb_secs xfs_params.eofb_timer.val 123 124 #define current_cpu() (raw_smp_processor_id()) 125 #define current_pid() (current->pid) 126 #define current_test_flags(f) (current->flags & (f)) 127 #define current_set_flags_nested(sp, f) \ 128 (*(sp) = current->flags, current->flags |= (f)) 129 #define current_clear_flags_nested(sp, f) \ 130 (*(sp) = current->flags, current->flags &= ~(f)) 131 #define current_restore_flags_nested(sp, f) \ 132 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 133 134 #define spinlock_destroy(lock) 135 136 #define NBBY 8 /* number of bits per byte */ 137 138 /* 139 * Size of block device i/o is parameterized here. 140 * Currently the system supports page-sized i/o. 141 */ 142 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 143 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 144 /* number of BB's per block device block */ 145 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 146 147 #define ENOATTR ENODATA /* Attribute not found */ 148 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 149 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 150 151 #define SYNCHRONIZE() barrier() 152 #define __return_address __builtin_return_address(0) 153 154 #define XFS_PROJID_DEFAULT 0 155 #define MAXPATHLEN 1024 156 157 #define MIN(a,b) (min(a,b)) 158 #define MAX(a,b) (max(a,b)) 159 #define howmany(x, y) (((x)+((y)-1))/(y)) 160 161 /* 162 * Various platform dependent calls that don't fit anywhere else 163 */ 164 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 165 #define xfs_stack_trace() dump_stack() 166 167 168 /* Move the kernel do_div definition off to one side */ 169 170 #if defined __i386__ 171 /* For ia32 we need to pull some tricks to get past various versions 172 * of the compiler which do not like us using do_div in the middle 173 * of large functions. 174 */ 175 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 176 { 177 __u32 mod; 178 179 switch (n) { 180 case 4: 181 mod = *(__u32 *)a % b; 182 *(__u32 *)a = *(__u32 *)a / b; 183 return mod; 184 case 8: 185 { 186 unsigned long __upper, __low, __high, __mod; 187 __u64 c = *(__u64 *)a; 188 __upper = __high = c >> 32; 189 __low = c; 190 if (__high) { 191 __upper = __high % (b); 192 __high = __high / (b); 193 } 194 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 195 asm("":"=A" (c):"a" (__low),"d" (__high)); 196 *(__u64 *)a = c; 197 return __mod; 198 } 199 } 200 201 /* NOTREACHED */ 202 return 0; 203 } 204 205 /* Side effect free 64 bit mod operation */ 206 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 207 { 208 switch (n) { 209 case 4: 210 return *(__u32 *)a % b; 211 case 8: 212 { 213 unsigned long __upper, __low, __high, __mod; 214 __u64 c = *(__u64 *)a; 215 __upper = __high = c >> 32; 216 __low = c; 217 if (__high) { 218 __upper = __high % (b); 219 __high = __high / (b); 220 } 221 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 222 asm("":"=A" (c):"a" (__low),"d" (__high)); 223 return __mod; 224 } 225 } 226 227 /* NOTREACHED */ 228 return 0; 229 } 230 #else 231 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 232 { 233 __u32 mod; 234 235 switch (n) { 236 case 4: 237 mod = *(__u32 *)a % b; 238 *(__u32 *)a = *(__u32 *)a / b; 239 return mod; 240 case 8: 241 mod = do_div(*(__u64 *)a, b); 242 return mod; 243 } 244 245 /* NOTREACHED */ 246 return 0; 247 } 248 249 /* Side effect free 64 bit mod operation */ 250 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 251 { 252 switch (n) { 253 case 4: 254 return *(__u32 *)a % b; 255 case 8: 256 { 257 __u64 c = *(__u64 *)a; 258 return do_div(c, b); 259 } 260 } 261 262 /* NOTREACHED */ 263 return 0; 264 } 265 #endif 266 267 #undef do_div 268 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 269 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 270 271 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 272 { 273 x += y - 1; 274 do_div(x, y); 275 return(x * y); 276 } 277 278 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 279 { 280 x += y - 1; 281 do_div(x, y); 282 return x; 283 } 284 285 /* ARM old ABI has some weird alignment/padding */ 286 #if defined(__arm__) && !defined(__ARM_EABI__) 287 #define __arch_pack __attribute__((packed)) 288 #else 289 #define __arch_pack 290 #endif 291 292 #define ASSERT_ALWAYS(expr) \ 293 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 294 295 #ifndef DEBUG 296 #define ASSERT(expr) ((void)0) 297 298 #ifndef STATIC 299 # define STATIC static noinline 300 #endif 301 302 #else /* DEBUG */ 303 304 #define ASSERT(expr) \ 305 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 306 307 #ifndef STATIC 308 # define STATIC noinline 309 #endif 310 311 #endif /* DEBUG */ 312 313 #endif /* __XFS_LINUX__ */ 314