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/kthread.h> 72 #include <linux/freezer.h> 73 #include <linux/list_sort.h> 74 75 #include <asm/page.h> 76 #include <asm/div64.h> 77 #include <asm/param.h> 78 #include <asm/uaccess.h> 79 #include <asm/byteorder.h> 80 #include <asm/unaligned.h> 81 82 #include "xfs_vnode.h" 83 #include "xfs_stats.h" 84 #include "xfs_sysctl.h" 85 #include "xfs_iops.h" 86 #include "xfs_aops.h" 87 #include "xfs_super.h" 88 #include "xfs_buf.h" 89 #include "xfs_message.h" 90 91 #ifdef __BIG_ENDIAN 92 #define XFS_NATIVE_HOST 1 93 #else 94 #undef XFS_NATIVE_HOST 95 #endif 96 97 /* 98 * Feature macros (disable/enable) 99 */ 100 #ifdef CONFIG_SMP 101 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 102 #else 103 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ 104 #endif 105 106 #define irix_sgid_inherit xfs_params.sgid_inherit.val 107 #define irix_symlink_mode xfs_params.symlink_mode.val 108 #define xfs_panic_mask xfs_params.panic_mask.val 109 #define xfs_error_level xfs_params.error_level.val 110 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 111 #define xfs_stats_clear xfs_params.stats_clear.val 112 #define xfs_inherit_sync xfs_params.inherit_sync.val 113 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 114 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 115 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val 116 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val 117 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 118 #define xfs_rotorstep xfs_params.rotorstep.val 119 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 120 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 121 122 #define current_cpu() (raw_smp_processor_id()) 123 #define current_pid() (current->pid) 124 #define current_test_flags(f) (current->flags & (f)) 125 #define current_set_flags_nested(sp, f) \ 126 (*(sp) = current->flags, current->flags |= (f)) 127 #define current_clear_flags_nested(sp, f) \ 128 (*(sp) = current->flags, current->flags &= ~(f)) 129 #define current_restore_flags_nested(sp, f) \ 130 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 131 132 #define spinlock_destroy(lock) 133 134 #define NBBY 8 /* number of bits per byte */ 135 136 /* 137 * Size of block device i/o is parameterized here. 138 * Currently the system supports page-sized i/o. 139 */ 140 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT 141 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 142 /* number of BB's per block device block */ 143 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 144 145 #define ENOATTR ENODATA /* Attribute not found */ 146 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 147 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 148 149 #define SYNCHRONIZE() barrier() 150 #define __return_address __builtin_return_address(0) 151 152 #define XFS_PROJID_DEFAULT 0 153 #define MAXPATHLEN 1024 154 155 #define MIN(a,b) (min(a,b)) 156 #define MAX(a,b) (max(a,b)) 157 #define howmany(x, y) (((x)+((y)-1))/(y)) 158 159 /* 160 * Various platform dependent calls that don't fit anywhere else 161 */ 162 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 163 #define xfs_stack_trace() dump_stack() 164 165 166 /* Move the kernel do_div definition off to one side */ 167 168 #if defined __i386__ 169 /* For ia32 we need to pull some tricks to get past various versions 170 * of the compiler which do not like us using do_div in the middle 171 * of large functions. 172 */ xfs_do_div(void * a,__u32 b,int n)173 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 174 { 175 __u32 mod; 176 177 switch (n) { 178 case 4: 179 mod = *(__u32 *)a % b; 180 *(__u32 *)a = *(__u32 *)a / b; 181 return mod; 182 case 8: 183 { 184 unsigned long __upper, __low, __high, __mod; 185 __u64 c = *(__u64 *)a; 186 __upper = __high = c >> 32; 187 __low = c; 188 if (__high) { 189 __upper = __high % (b); 190 __high = __high / (b); 191 } 192 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 193 asm("":"=A" (c):"a" (__low),"d" (__high)); 194 *(__u64 *)a = c; 195 return __mod; 196 } 197 } 198 199 /* NOTREACHED */ 200 return 0; 201 } 202 203 /* Side effect free 64 bit mod operation */ xfs_do_mod(void * a,__u32 b,int n)204 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 205 { 206 switch (n) { 207 case 4: 208 return *(__u32 *)a % b; 209 case 8: 210 { 211 unsigned long __upper, __low, __high, __mod; 212 __u64 c = *(__u64 *)a; 213 __upper = __high = c >> 32; 214 __low = c; 215 if (__high) { 216 __upper = __high % (b); 217 __high = __high / (b); 218 } 219 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 220 asm("":"=A" (c):"a" (__low),"d" (__high)); 221 return __mod; 222 } 223 } 224 225 /* NOTREACHED */ 226 return 0; 227 } 228 #else xfs_do_div(void * a,__u32 b,int n)229 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 230 { 231 __u32 mod; 232 233 switch (n) { 234 case 4: 235 mod = *(__u32 *)a % b; 236 *(__u32 *)a = *(__u32 *)a / b; 237 return mod; 238 case 8: 239 mod = do_div(*(__u64 *)a, b); 240 return mod; 241 } 242 243 /* NOTREACHED */ 244 return 0; 245 } 246 247 /* Side effect free 64 bit mod operation */ xfs_do_mod(void * a,__u32 b,int n)248 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 249 { 250 switch (n) { 251 case 4: 252 return *(__u32 *)a % b; 253 case 8: 254 { 255 __u64 c = *(__u64 *)a; 256 return do_div(c, b); 257 } 258 } 259 260 /* NOTREACHED */ 261 return 0; 262 } 263 #endif 264 265 #undef do_div 266 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 267 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 268 roundup_64(__uint64_t x,__uint32_t y)269 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 270 { 271 x += y - 1; 272 do_div(x, y); 273 return(x * y); 274 } 275 howmany_64(__uint64_t x,__uint32_t y)276 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 277 { 278 x += y - 1; 279 do_div(x, y); 280 return x; 281 } 282 283 /* ARM old ABI has some weird alignment/padding */ 284 #if defined(__arm__) && !defined(__ARM_EABI__) 285 #define __arch_pack __attribute__((packed)) 286 #else 287 #define __arch_pack 288 #endif 289 290 #define ASSERT_ALWAYS(expr) \ 291 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 292 293 #ifndef DEBUG 294 #define ASSERT(expr) ((void)0) 295 296 #ifndef STATIC 297 # define STATIC static noinline 298 #endif 299 300 #else /* DEBUG */ 301 302 #define ASSERT(expr) \ 303 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 304 305 #ifndef STATIC 306 # define STATIC noinline 307 #endif 308 309 #endif /* DEBUG */ 310 311 #endif /* __XFS_LINUX__ */ 312