1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2000-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #ifndef __XFS_LINUX__ 7 #define __XFS_LINUX__ 8 9 #include <linux/types.h> 10 #include <linux/uuid.h> 11 12 /* 13 * Kernel specific type declarations for XFS 14 */ 15 16 typedef __s64 xfs_off_t; /* <file offset> type */ 17 typedef unsigned long long xfs_ino_t; /* <inode> type */ 18 typedef __s64 xfs_daddr_t; /* <disk address> type */ 19 typedef __u32 xfs_dev_t; 20 typedef __u32 xfs_nlink_t; 21 22 #include "xfs_types.h" 23 24 #include "kmem.h" 25 #include "mrlock.h" 26 27 #include <linux/semaphore.h> 28 #include <linux/mm.h> 29 #include <linux/sched/mm.h> 30 #include <linux/kernel.h> 31 #include <linux/blkdev.h> 32 #include <linux/slab.h> 33 #include <linux/crc32c.h> 34 #include <linux/module.h> 35 #include <linux/mutex.h> 36 #include <linux/file.h> 37 #include <linux/swap.h> 38 #include <linux/errno.h> 39 #include <linux/sched/signal.h> 40 #include <linux/bitops.h> 41 #include <linux/major.h> 42 #include <linux/pagemap.h> 43 #include <linux/vfs.h> 44 #include <linux/seq_file.h> 45 #include <linux/init.h> 46 #include <linux/list.h> 47 #include <linux/proc_fs.h> 48 #include <linux/sort.h> 49 #include <linux/cpu.h> 50 #include <linux/notifier.h> 51 #include <linux/delay.h> 52 #include <linux/log2.h> 53 #include <linux/spinlock.h> 54 #include <linux/random.h> 55 #include <linux/ctype.h> 56 #include <linux/writeback.h> 57 #include <linux/capability.h> 58 #include <linux/kthread.h> 59 #include <linux/freezer.h> 60 #include <linux/list_sort.h> 61 #include <linux/ratelimit.h> 62 #include <linux/rhashtable.h> 63 64 #include <asm/page.h> 65 #include <asm/div64.h> 66 #include <asm/param.h> 67 #include <linux/uaccess.h> 68 #include <asm/byteorder.h> 69 #include <asm/unaligned.h> 70 71 #include "xfs_fs.h" 72 #include "xfs_stats.h" 73 #include "xfs_sysctl.h" 74 #include "xfs_iops.h" 75 #include "xfs_aops.h" 76 #include "xfs_super.h" 77 #include "xfs_cksum.h" 78 #include "xfs_buf.h" 79 #include "xfs_message.h" 80 81 #ifdef __BIG_ENDIAN 82 #define XFS_NATIVE_HOST 1 83 #else 84 #undef XFS_NATIVE_HOST 85 #endif 86 87 #define irix_sgid_inherit xfs_params.sgid_inherit.val 88 #define irix_symlink_mode xfs_params.symlink_mode.val 89 #define xfs_panic_mask xfs_params.panic_mask.val 90 #define xfs_error_level xfs_params.error_level.val 91 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 92 #define xfs_stats_clear xfs_params.stats_clear.val 93 #define xfs_inherit_sync xfs_params.inherit_sync.val 94 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 95 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 96 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 97 #define xfs_rotorstep xfs_params.rotorstep.val 98 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 99 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 100 #define xfs_eofb_secs xfs_params.eofb_timer.val 101 #define xfs_cowb_secs xfs_params.cowb_timer.val 102 103 #define current_cpu() (raw_smp_processor_id()) 104 #define current_pid() (current->pid) 105 #define current_test_flags(f) (current->flags & (f)) 106 #define current_set_flags_nested(sp, f) \ 107 (*(sp) = current->flags, current->flags |= (f)) 108 #define current_clear_flags_nested(sp, f) \ 109 (*(sp) = current->flags, current->flags &= ~(f)) 110 #define current_restore_flags_nested(sp, f) \ 111 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 112 113 #define NBBY 8 /* number of bits per byte */ 114 115 /* 116 * Size of block device i/o is parameterized here. 117 * Currently the system supports page-sized i/o. 118 */ 119 #define BLKDEV_IOSHIFT PAGE_SHIFT 120 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 121 /* number of BB's per block device block */ 122 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 123 124 #define ENOATTR ENODATA /* Attribute not found */ 125 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 126 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 127 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 128 129 #define SYNCHRONIZE() barrier() 130 #define __return_address __builtin_return_address(0) 131 132 /* 133 * Return the address of a label. Use barrier() so that the optimizer 134 * won't reorder code to refactor the error jumpouts into a single 135 * return, which throws off the reported address. 136 */ 137 #define __this_address ({ __label__ __here; __here: barrier(); &&__here; }) 138 139 #define XFS_PROJID_DEFAULT 0 140 141 #define howmany(x, y) (((x)+((y)-1))/(y)) 142 143 static inline void delay(long ticks) 144 { 145 schedule_timeout_uninterruptible(ticks); 146 } 147 148 /* 149 * XFS wrapper structure for sysfs support. It depends on external data 150 * structures and is embedded in various internal data structures to implement 151 * the XFS sysfs object heirarchy. Define it here for broad access throughout 152 * the codebase. 153 */ 154 struct xfs_kobj { 155 struct kobject kobject; 156 struct completion complete; 157 }; 158 159 struct xstats { 160 struct xfsstats __percpu *xs_stats; 161 struct xfs_kobj xs_kobj; 162 }; 163 164 extern struct xstats xfsstats; 165 166 /* Kernel uid/gid conversion. These are used to convert to/from the on disk 167 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally. 168 * The conversion here is type only, the value will remain the same since we 169 * are converting to the init_user_ns. The uid is later mapped to a particular 170 * user namespace value when crossing the kernel/user boundary. 171 */ 172 static inline uint32_t xfs_kuid_to_uid(kuid_t uid) 173 { 174 return from_kuid(&init_user_ns, uid); 175 } 176 177 static inline kuid_t xfs_uid_to_kuid(uint32_t uid) 178 { 179 return make_kuid(&init_user_ns, uid); 180 } 181 182 static inline uint32_t xfs_kgid_to_gid(kgid_t gid) 183 { 184 return from_kgid(&init_user_ns, gid); 185 } 186 187 static inline kgid_t xfs_gid_to_kgid(uint32_t gid) 188 { 189 return make_kgid(&init_user_ns, gid); 190 } 191 192 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev) 193 { 194 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev)); 195 } 196 197 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev) 198 { 199 return sysv_encode_dev(dev); 200 } 201 202 /* 203 * Various platform dependent calls that don't fit anywhere else 204 */ 205 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 206 #define xfs_stack_trace() dump_stack() 207 208 static inline uint64_t roundup_64(uint64_t x, uint32_t y) 209 { 210 x += y - 1; 211 do_div(x, y); 212 return x * y; 213 } 214 215 static inline uint64_t howmany_64(uint64_t x, uint32_t y) 216 { 217 x += y - 1; 218 do_div(x, y); 219 return x; 220 } 221 222 int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, 223 char *data, unsigned int op); 224 225 #define ASSERT_ALWAYS(expr) \ 226 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 227 228 #ifdef DEBUG 229 #define ASSERT(expr) \ 230 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 231 232 #else /* !DEBUG */ 233 234 #ifdef XFS_WARN 235 236 #define ASSERT(expr) \ 237 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__)) 238 239 #else /* !DEBUG && !XFS_WARN */ 240 241 #define ASSERT(expr) ((void)0) 242 243 #endif /* XFS_WARN */ 244 #endif /* DEBUG */ 245 246 #define XFS_IS_CORRUPT(mp, expr) \ 247 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \ 248 NULL, 0, __FILE__, __LINE__, \ 249 __this_address), \ 250 true : false) 251 252 #define STATIC static noinline 253 254 #ifdef CONFIG_XFS_RT 255 256 /* 257 * make sure we ignore the inode flag if the filesystem doesn't have a 258 * configured realtime device. 259 */ 260 #define XFS_IS_REALTIME_INODE(ip) \ 261 (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) && \ 262 (ip)->i_mount->m_rtdev_targp) 263 #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0) 264 #else 265 #define XFS_IS_REALTIME_INODE(ip) (0) 266 #define XFS_IS_REALTIME_MOUNT(mp) (0) 267 #endif 268 269 /* 270 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier 271 * prints a hashed version of the pointer to avoid leaking kernel 272 * pointers into dmesg. If we're trying to debug the kernel we want the 273 * raw values, so override this behavior as best we can. 274 */ 275 #ifdef DEBUG 276 # define PTR_FMT "%px" 277 #else 278 # define PTR_FMT "%p" 279 #endif 280 281 #endif /* __XFS_LINUX__ */ 282