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/signal.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 #include <linux/rhashtable.h> 82 83 #include <asm/page.h> 84 #include <asm/div64.h> 85 #include <asm/param.h> 86 #include <linux/uaccess.h> 87 #include <asm/byteorder.h> 88 #include <asm/unaligned.h> 89 90 #include "xfs_fs.h" 91 #include "xfs_stats.h" 92 #include "xfs_sysctl.h" 93 #include "xfs_iops.h" 94 #include "xfs_aops.h" 95 #include "xfs_super.h" 96 #include "xfs_cksum.h" 97 #include "xfs_buf.h" 98 #include "xfs_message.h" 99 100 #ifdef __BIG_ENDIAN 101 #define XFS_NATIVE_HOST 1 102 #else 103 #undef XFS_NATIVE_HOST 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_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 #define xfs_eofb_secs xfs_params.eofb_timer.val 120 #define xfs_cowb_secs xfs_params.cowb_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_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 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 149 150 #define SYNCHRONIZE() barrier() 151 #define __return_address __builtin_return_address(0) 152 153 #define XFS_PROJID_DEFAULT 0 154 #define MAXPATHLEN 1024 155 156 #define MIN(a,b) (min(a,b)) 157 #define MAX(a,b) (max(a,b)) 158 #define howmany(x, y) (((x)+((y)-1))/(y)) 159 160 static inline void delay(long ticks) 161 { 162 schedule_timeout_uninterruptible(ticks); 163 } 164 165 /* 166 * XFS wrapper structure for sysfs support. It depends on external data 167 * structures and is embedded in various internal data structures to implement 168 * the XFS sysfs object heirarchy. Define it here for broad access throughout 169 * the codebase. 170 */ 171 struct xfs_kobj { 172 struct kobject kobject; 173 struct completion complete; 174 }; 175 176 struct xstats { 177 struct xfsstats __percpu *xs_stats; 178 struct xfs_kobj xs_kobj; 179 }; 180 181 extern struct xstats xfsstats; 182 183 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 184 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 185 * The conversion here is type only, the value will remain the same since we 186 * are converting to the init_user_ns. The uid is later mapped to a particular 187 * user namespace value when crossing the kernel/user boundary. 188 */ 189 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid) 190 { 191 return from_kuid(&init_user_ns, uid); 192 } 193 194 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid) 195 { 196 return make_kuid(&init_user_ns, uid); 197 } 198 199 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid) 200 { 201 return from_kgid(&init_user_ns, gid); 202 } 203 204 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid) 205 { 206 return make_kgid(&init_user_ns, gid); 207 } 208 209 /* 210 * Various platform dependent calls that don't fit anywhere else 211 */ 212 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 213 #define xfs_stack_trace() dump_stack() 214 215 /* Side effect free 64 bit mod operation */ 216 static inline __u32 xfs_do_mod(void *a, __u32 b, int n) 217 { 218 switch (n) { 219 case 4: 220 return *(__u32 *)a % b; 221 case 8: 222 { 223 __u64 c = *(__u64 *)a; 224 return do_div(c, b); 225 } 226 } 227 228 /* NOTREACHED */ 229 return 0; 230 } 231 232 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a)) 233 234 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y) 235 { 236 x += y - 1; 237 do_div(x, y); 238 return x * y; 239 } 240 241 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y) 242 { 243 x += y - 1; 244 do_div(x, y); 245 return x; 246 } 247 248 #define ASSERT_ALWAYS(expr) \ 249 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 250 251 #ifdef DEBUG 252 #define ASSERT(expr) \ 253 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__)) 254 255 #ifndef STATIC 256 # define STATIC noinline 257 #endif 258 259 #else /* !DEBUG */ 260 261 #ifdef XFS_WARN 262 263 #define ASSERT(expr) \ 264 (likely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__)) 265 266 #ifndef STATIC 267 # define STATIC static noinline 268 #endif 269 270 #else /* !DEBUG && !XFS_WARN */ 271 272 #define ASSERT(expr) ((void)0) 273 274 #ifndef STATIC 275 # define STATIC static noinline 276 #endif 277 278 #endif /* XFS_WARN */ 279 #endif /* DEBUG */ 280 281 #ifdef CONFIG_XFS_RT 282 #define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) 283 #else 284 #define XFS_IS_REALTIME_INODE(ip) (0) 285 #endif 286 287 #endif /* __XFS_LINUX__ */ 288