| 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 | |
| 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_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 | #define EFSBADCRC EBADMSG /* Bad CRC detected */ |
| 147 | |
| 148 | #define SYNCHRONIZE() barrier() |
| 149 | #define __return_address __builtin_return_address(0) |
| 150 | |
| 151 | #define XFS_PROJID_DEFAULT 0 |
| 152 | #define MAXPATHLEN 1024 |
| 153 | |
| 154 | #define MIN(a,b) (min(a,b)) |
| 155 | #define MAX(a,b) (max(a,b)) |
| 156 | #define howmany(x, y) (((x)+((y)-1))/(y)) |
| 157 | |
| 158 | static inline void delay(long ticks) |
| 159 | { |
| 160 | schedule_timeout_uninterruptible(ticks); |
| 161 | } |
| 162 | |
| 163 | /* |
| 164 | * XFS wrapper structure for sysfs support. It depends on external data |
| 165 | * structures and is embedded in various internal data structures to implement |
| 166 | * the XFS sysfs object heirarchy. Define it here for broad access throughout |
| 167 | * the codebase. |
| 168 | */ |
| 169 | struct xfs_kobj { |
| 170 | struct kobject kobject; |
| 171 | struct completion complete; |
| 172 | }; |
| 173 | |
| 174 | struct xstats { |
| 175 | struct xfsstats __percpu *xs_stats; |
| 176 | struct xfs_kobj xs_kobj; |
| 177 | }; |
| 178 | |
| 179 | extern struct xstats xfsstats; |
| 180 | |
| 181 | /* Kernel uid/gid conversion. These are used to convert to/from the on disk |
| 182 | * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. |
| 183 | * The conversion here is type only, the value will remain the same since we |
| 184 | * are converting to the init_user_ns. The uid is later mapped to a particular |
| 185 | * user namespace value when crossing the kernel/user boundary. |
| 186 | */ |
| 187 | static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) |
| 188 | { |
| 189 | return from_kuid(&init_user_ns, uid); |
| 190 | } |
| 191 | |
| 192 | static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) |
| 193 | { |
| 194 | return make_kuid(&init_user_ns, uid); |
| 195 | } |
| 196 | |
| 197 | static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) |
| 198 | { |
| 199 | return from_kgid(&init_user_ns, gid); |
| 200 | } |
| 201 | |
| 202 | static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) |
| 203 | { |
| 204 | return make_kgid(&init_user_ns, gid); |
| 205 | } |
| 206 | |
| 207 | /* |
| 208 | * Various platform dependent calls that don't fit anywhere else |
| 209 | */ |
| 210 | #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) |
| 211 | #define xfs_stack_trace() dump_stack() |
| 212 | |
| 213 | |
| 214 | /* Move the kernel do_div definition off to one side */ |
| 215 | |
| 216 | #if defined __i386__ |
| 217 | /* For ia32 we need to pull some tricks to get past various versions |
| 218 | * of the compiler which do not like us using do_div in the middle |
| 219 | * of large functions. |
| 220 | */ |
| 221 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) |
| 222 | { |
| 223 | __u32 mod; |
| 224 | |
| 225 | switch (n) { |
| 226 | case 4: |
| 227 | mod = *(__u32 *)a % b; |
| 228 | *(__u32 *)a = *(__u32 *)a / b; |
| 229 | return mod; |
| 230 | case 8: |
| 231 | { |
| 232 | unsigned long __upper, __low, __high, __mod; |
| 233 | __u64 c = *(__u64 *)a; |
| 234 | __upper = __high = c >> 32; |
| 235 | __low = c; |
| 236 | if (__high) { |
| 237 | __upper = __high % (b); |
| 238 | __high = __high / (b); |
| 239 | } |
| 240 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); |
| 241 | asm("":"=A" (c):"a" (__low),"d" (__high)); |
| 242 | *(__u64 *)a = c; |
| 243 | return __mod; |
| 244 | } |
| 245 | } |
| 246 | |
| 247 | /* NOTREACHED */ |
| 248 | return 0; |
| 249 | } |
| 250 | |
| 251 | /* Side effect free 64 bit mod operation */ |
| 252 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) |
| 253 | { |
| 254 | switch (n) { |
| 255 | case 4: |
| 256 | return *(__u32 *)a % b; |
| 257 | case 8: |
| 258 | { |
| 259 | unsigned long __upper, __low, __high, __mod; |
| 260 | __u64 c = *(__u64 *)a; |
| 261 | __upper = __high = c >> 32; |
| 262 | __low = c; |
| 263 | if (__high) { |
| 264 | __upper = __high % (b); |
| 265 | __high = __high / (b); |
| 266 | } |
| 267 | asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper)); |
| 268 | asm("":"=A" (c):"a" (__low),"d" (__high)); |
| 269 | return __mod; |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | /* NOTREACHED */ |
| 274 | return 0; |
| 275 | } |
| 276 | #else |
| 277 | static inline __u32 xfs_do_div(void *a, __u32 b, int n) |
| 278 | { |
| 279 | __u32 mod; |
| 280 | |
| 281 | switch (n) { |
| 282 | case 4: |
| 283 | mod = *(__u32 *)a % b; |
| 284 | *(__u32 *)a = *(__u32 *)a / b; |
| 285 | return mod; |
| 286 | case 8: |
| 287 | mod = do_div(*(__u64 *)a, b); |
| 288 | return mod; |
| 289 | } |
| 290 | |
| 291 | /* NOTREACHED */ |
| 292 | return 0; |
| 293 | } |
| 294 | |
| 295 | /* Side effect free 64 bit mod operation */ |
| 296 | static inline __u32 xfs_do_mod(void *a, __u32 b, int n) |
| 297 | { |
| 298 | switch (n) { |
| 299 | case 4: |
| 300 | return *(__u32 *)a % b; |
| 301 | case 8: |
| 302 | { |
| 303 | __u64 c = *(__u64 *)a; |
| 304 | return do_div(c, b); |
| 305 | } |
| 306 | } |
| 307 | |
| 308 | /* NOTREACHED */ |
| 309 | return 0; |
| 310 | } |
| 311 | #endif |
| 312 | |
| 313 | #undef do_div |
| 314 | #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a)) |
| 315 | #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) |
| 316 | |
| 317 | static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) |
| 318 | { |
| 319 | x += y - 1; |
| 320 | do_div(x, y); |
| 321 | return x * y; |
| 322 | } |
| 323 | |
| 324 | static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) |
| 325 | { |
| 326 | x += y - 1; |
| 327 | do_div(x, y); |
| 328 | return x; |
| 329 | } |
| 330 | |
| 331 | #define ASSERT_ALWAYS(expr) \ |
| 332 | (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) |
| 333 | |
| 334 | #ifdef DEBUG |
| 335 | #define ASSERT(expr) \ |
| 336 | (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) |
| 337 | |
| 338 | #ifndef STATIC |
| 339 | # define STATIC noinline |
| 340 | #endif |
| 341 | |
| 342 | #else /* !DEBUG */ |
| 343 | |
| 344 | #ifdef XFS_WARN |
| 345 | |
| 346 | #define ASSERT(expr) \ |
| 347 | (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) |
| 348 | |
| 349 | #ifndef STATIC |
| 350 | # define STATIC static noinline |
| 351 | #endif |
| 352 | |
| 353 | #else /* !DEBUG && !XFS_WARN */ |
| 354 | |
| 355 | #define ASSERT(expr) ((void)0) |
| 356 | |
| 357 | #ifndef STATIC |
| 358 | # define STATIC static noinline |
| 359 | #endif |
| 360 | |
| 361 | #endif /* XFS_WARN */ |
| 362 | #endif /* DEBUG */ |
| 363 | |
| 364 | #ifdef CONFIG_XFS_RT |
| 365 | #define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) |
| 366 | #else |
| 367 | #define XFS_IS_REALTIME_INODE(ip) (0) |
| 368 | #endif |
| 369 | |
| 370 | #endif /* __XFS_LINUX__ */ |