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 * Kernel specific type declarations for XFS 25 */ 26 typedef signed char __int8_t; 27 typedef unsigned char __uint8_t; 28 typedef signed short int __int16_t; 29 typedef unsigned short int __uint16_t; 30 typedef signed int __int32_t; 31 typedef unsigned int __uint32_t; 32 typedef signed long long int __int64_t; 33 typedef unsigned long long int __uint64_t; 34 35 typedef __s64 xfs_off_t; /* <file offset> type */ 36 typedef unsigned long long xfs_ino_t; /* <inode> type */ 37 typedef __s64 xfs_daddr_t; /* <disk address> type */ 38 typedef __u32 xfs_dev_t; 39 typedef __u32 xfs_nlink_t; 40 41 #include "xfs_types.h" 42 43 #include "kmem.h" 44 #include "mrlock.h" 45 #include "uuid.h" 46 47 #include <linux/semaphore.h> 48 #include <linux/mm.h> 49 #include <linux/kernel.h> 50 #include <linux/blkdev.h> 51 #include <linux/slab.h> 52 #include <linux/crc32c.h> 53 #include <linux/module.h> 54 #include <linux/mutex.h> 55 #include <linux/file.h> 56 #include <linux/swap.h> 57 #include <linux/errno.h> 58 #include <linux/sched.h> 59 #include <linux/bitops.h> 60 #include <linux/major.h> 61 #include <linux/pagemap.h> 62 #include <linux/vfs.h> 63 #include <linux/seq_file.h> 64 #include <linux/init.h> 65 #include <linux/list.h> 66 #include <linux/proc_fs.h> 67 #include <linux/sort.h> 68 #include <linux/cpu.h> 69 #include <linux/notifier.h> 70 #include <linux/delay.h> 71 #include <linux/log2.h> 72 #include <linux/spinlock.h> 73 #include <linux/random.h> 74 #include <linux/ctype.h> 75 #include <linux/writeback.h> 76 #include <linux/capability.h> 77 #include <linux/kthread.h> 78 #include <linux/freezer.h> 79 #include <linux/list_sort.h> 80 #include <linux/ratelimit.h> 81 82 #include <asm/page.h> 83 #include <asm/div64.h> 84 #include <asm/param.h> 85 #include <asm/uaccess.h> 86 #include <asm/byteorder.h> 87 #include <asm/unaligned.h> 88 89 #include "xfs_fs.h" 90 #include "xfs_stats.h" 91 #include "xfs_sysctl.h" 92 #include "xfs_iops.h" 93 #include "xfs_aops.h" 94 #include "xfs_super.h" 95 #include "xfs_cksum.h" 96 #include "xfs_buf.h" 97 #include "xfs_message.h" 98 99 #ifdef __BIG_ENDIAN 100 #define XFS_NATIVE_HOST 1 101 #else 102 #undef XFS_NATIVE_HOST 103 #endif 104 105 #define irix_sgid_inherit xfs_params.sgid_inherit.val 106 #define irix_symlink_mode xfs_params.symlink_mode.val 107 #define xfs_panic_mask xfs_params.panic_mask.val 108 #define xfs_error_level xfs_params.error_level.val 109 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 110 #define xfs_stats_clear xfs_params.stats_clear.val 111 #define xfs_inherit_sync xfs_params.inherit_sync.val 112 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 113 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 114 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 115 #define xfs_rotorstep xfs_params.rotorstep.val 116 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 117 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 118 #define xfs_eofb_secs xfs_params.eofb_timer.val 119 #define xfs_cowb_secs xfs_params.cowb_timer.val 120 121 #define current_cpu() (raw_smp_processor_id()) 122 #define current_pid() (current->pid) 123 #define current_test_flags(f) (current->flags & (f)) 124 #define current_set_flags_nested(sp, f) \ 125 (*(sp) = current->flags, current->flags |= (f)) 126 #define current_clear_flags_nested(sp, f) \ 127 (*(sp) = current->flags, current->flags &= ~(f)) 128 #define current_restore_flags_nested(sp, f) \ 129 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 130 131 #define spinlock_destroy(lock) 132 133 #define NBBY 8 /* number of bits per byte */ 134 135 /* 136 * Size of block device i/o is parameterized here. 137 * Currently the system supports page-sized i/o. 138 */ 139 #define BLKDEV_IOSHIFT PAGE_SHIFT 140 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 141 /* number of BB's per block device block */ 142 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 143 144 #define ENOATTR ENODATA /* Attribute not found */ 145 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 146 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 147 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 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 static inline void delay(long ticks) 160 { 161 schedule_timeout_uninterruptible(ticks); 162 } 163 164 /* 165 * XFS wrapper structure for sysfs support. It depends on external data 166 * structures and is embedded in various internal data structures to implement 167 * the XFS sysfs object heirarchy. Define it here for broad access throughout 168 * the codebase. 169 */ 170 struct xfs_kobj { 171 struct kobject kobject; 172 struct completion complete; 173 }; 174 175 struct xstats { 176 struct xfsstats __percpu *xs_stats; 177 struct xfs_kobj xs_kobj; 178 }; 179 180 extern struct xstats xfsstats; 181 182 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 183 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 184 * The conversion here is type only, the value will remain the same since we 185 * are converting to the init_user_ns. The uid is later mapped to a particular 186 * user namespace value when crossing the kernel/user boundary. 187 */ 188 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 189 { 190 return from_kuid(&init_user_ns, uid); 191 } 192 193 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 194 { 195 return make_kuid(&init_user_ns, uid); 196 } 197 198 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 199 { 200 return from_kgid(&init_user_ns, gid); 201 } 202 203 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 204 { 205 return make_kgid(&init_user_ns, gid); 206 } 207 208 /* 209 * Various platform dependent calls that don't fit anywhere else 210 */ 211 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 212 #define xfs_stack_trace() dump_stack() 213 214 215 /* Move the kernel do_div definition off to one side */ 216 217 #if defined __i386__ 218 /* For ia32 we need to pull some tricks to get past various versions 219 * of the compiler which do not like us using do_div in the middle 220 * of large functions. 221 */ 222 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 223 { 224 __u32 mod; 225 226 switch (n) { 227 case 4: 228 mod = *(__u32 *)a % b; 229 *(__u32 *)a = *(__u32 *)a / b; 230 return mod; 231 case 8: 232 { 233 unsigned long __upper, __low, __high, __mod; 234 __u64 c = *(__u64 *)a; 235 __upper = __high = c >> 32; 236 __low = c; 237 if (__high) { 238 __upper = __high % (b); 239 __high = __high / (b); 240 } 241 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 242 asm("":"=A" (c):"a" (__low),"d" (__high)); 243 *(__u64 *)a = c; 244 return __mod; 245 } 246 } 247 248 /* NOTREACHED */ 249 return 0; 250 } 251 252 /* Side effect free 64 bit mod operation */ 253 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 254 { 255 switch (n) { 256 case 4: 257 return *(__u32 *)a % b; 258 case 8: 259 { 260 unsigned long __upper, __low, __high, __mod; 261 __u64 c = *(__u64 *)a; 262 __upper = __high = c >> 32; 263 __low = c; 264 if (__high) { 265 __upper = __high % (b); 266 __high = __high / (b); 267 } 268 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); 269 asm("":"=A" (c):"a" (__low),"d" (__high)); 270 return __mod; 271 } 272 } 273 274 /* NOTREACHED */ 275 return 0; 276 } 277 #else 278 static inline __u32 xfs_do_div(void *a, __u32 b, int n) 279 { 280 __u32 mod; 281 282 switch (n) { 283 case 4: 284 mod = *(__u32 *)a % b; 285 *(__u32 *)a = *(__u32 *)a / b; 286 return mod; 287 case 8: 288 mod = do_div(*(__u64 *)a, b); 289 return mod; 290 } 291 292 /* NOTREACHED */ 293 return 0; 294 } 295 296 /* Side effect free 64 bit mod operation */ 297 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 298 { 299 switch (n) { 300 case 4: 301 return *(__u32 *)a % b; 302 case 8: 303 { 304 __u64 c = *(__u64 *)a; 305 return do_div(c, b); 306 } 307 } 308 309 /* NOTREACHED */ 310 return 0; 311 } 312 #endif 313 314 #undef do_div 315 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) 316 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 317 318 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 319 { 320 x += y - 1; 321 do_div(x, y); 322 return x * y; 323 } 324 325 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 326 { 327 x += y - 1; 328 do_div(x, y); 329 return x; 330 } 331 332 #define ASSERT_ALWAYS(expr) \ 333 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 334 335 #ifdef DEBUG 336 #define ASSERT(expr) \ 337 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 338 339 #ifndef STATIC 340 # define STATIC noinline 341 #endif 342 343 #else /* !DEBUG */ 344 345 #ifdef XFS_WARN 346 347 #define ASSERT(expr) \ 348 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 349 350 #ifndef STATIC 351 # define STATIC static noinline 352 #endif 353 354 #else /* !DEBUG && !XFS_WARN */ 355 356 #define ASSERT(expr) ((void)0) 357 358 #ifndef STATIC 359 # define STATIC static noinline 360 #endif 361 362 #endif /* XFS_WARN */ 363 #endif /* DEBUG */ 364 365 #ifdef CONFIG_XFS_RT 366 #define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) 367 #else 368 #define XFS_IS_REALTIME_INODE(ip) (0) 369 #endif 370 371 #endif /* __XFS_LINUX__ */ 372