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 #include <linux/xattr.h> 64 65 #include <asm/page.h> 66 #include <asm/div64.h> 67 #include <asm/param.h> 68 #include <linux/uaccess.h> 69 #include <asm/byteorder.h> 70 #include <asm/unaligned.h> 71 72 #include "xfs_fs.h" 73 #include "xfs_stats.h" 74 #include "xfs_sysctl.h" 75 #include "xfs_iops.h" 76 #include "xfs_aops.h" 77 #include "xfs_super.h" 78 #include "xfs_cksum.h" 79 #include "xfs_buf.h" 80 #include "xfs_message.h" 81 82 #ifdef __BIG_ENDIAN 83 #define XFS_NATIVE_HOST 1 84 #else 85 #undef XFS_NATIVE_HOST 86 #endif 87 88 #define irix_sgid_inherit xfs_params.sgid_inherit.val 89 #define irix_symlink_mode xfs_params.symlink_mode.val 90 #define xfs_panic_mask xfs_params.panic_mask.val 91 #define xfs_error_level xfs_params.error_level.val 92 #define xfs_syncd_centisecs xfs_params.syncd_timer.val 93 #define xfs_stats_clear xfs_params.stats_clear.val 94 #define xfs_inherit_sync xfs_params.inherit_sync.val 95 #define xfs_inherit_nodump xfs_params.inherit_nodump.val 96 #define xfs_inherit_noatime xfs_params.inherit_noatim.val 97 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val 98 #define xfs_rotorstep xfs_params.rotorstep.val 99 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val 100 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val 101 #define xfs_eofb_secs xfs_params.eofb_timer.val 102 #define xfs_cowb_secs xfs_params.cowb_timer.val 103 104 #define current_cpu() (raw_smp_processor_id()) 105 #define current_pid() (current->pid) 106 #define current_test_flags(f) (current->flags & (f)) 107 #define current_set_flags_nested(sp, f) \ 108 (*(sp) = current->flags, current->flags |= (f)) 109 #define current_clear_flags_nested(sp, f) \ 110 (*(sp) = current->flags, current->flags &= ~(f)) 111 #define current_restore_flags_nested(sp, f) \ 112 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) 113 114 #define NBBY 8 /* number of bits per byte */ 115 116 /* 117 * Size of block device i/o is parameterized here. 118 * Currently the system supports page-sized i/o. 119 */ 120 #define BLKDEV_IOSHIFT PAGE_SHIFT 121 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT) 122 /* number of BB's per block device block */ 123 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE) 124 125 #define ENOATTR ENODATA /* Attribute not found */ 126 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */ 127 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */ 128 #define EFSBADCRC EBADMSG /* Bad CRC detected */ 129 130 #define SYNCHRONIZE() barrier() 131 #define __return_address __builtin_return_address(0) 132 133 /* 134 * Return the address of a label. Use barrier() so that the optimizer 135 * won't reorder code to refactor the error jumpouts into a single 136 * return, which throws off the reported address. 137 */ 138 #define __this_address ({ __label__ __here; __here: barrier(); &&__here; }) 139 140 #define XFS_PROJID_DEFAULT 0 141 142 #define howmany(x, y) (((x)+((y)-1))/(y)) 143 144 static inline void delay(long ticks) 145 { 146 schedule_timeout_uninterruptible(ticks); 147 } 148 149 /* 150 * XFS wrapper structure for sysfs support. It depends on external data 151 * structures and is embedded in various internal data structures to implement 152 * the XFS sysfs object heirarchy. Define it here for broad access throughout 153 * the codebase. 154 */ 155 struct xfs_kobj { 156 struct kobject kobject; 157 struct completion complete; 158 }; 159 160 struct xstats { 161 struct xfsstats __percpu *xs_stats; 162 struct xfs_kobj xs_kobj; 163 }; 164 165 extern struct xstats xfsstats; 166 167 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev) 168 { 169 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev)); 170 } 171 172 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev) 173 { 174 return sysv_encode_dev(dev); 175 } 176 177 /* 178 * Various platform dependent calls that don't fit anywhere else 179 */ 180 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL) 181 #define xfs_stack_trace() dump_stack() 182 183 static inline uint64_t roundup_64(uint64_t x, uint32_t y) 184 { 185 x += y - 1; 186 do_div(x, y); 187 return x * y; 188 } 189 190 static inline uint64_t howmany_64(uint64_t x, uint32_t y) 191 { 192 x += y - 1; 193 do_div(x, y); 194 return x; 195 } 196 197 int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count, 198 char *data, unsigned int op); 199 200 #define ASSERT_ALWAYS(expr) \ 201 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 202 203 #ifdef DEBUG 204 #define ASSERT(expr) \ 205 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__)) 206 207 #else /* !DEBUG */ 208 209 #ifdef XFS_WARN 210 211 #define ASSERT(expr) \ 212 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__)) 213 214 #else /* !DEBUG && !XFS_WARN */ 215 216 #define ASSERT(expr) ((void)0) 217 218 #endif /* XFS_WARN */ 219 #endif /* DEBUG */ 220 221 #define XFS_IS_CORRUPT(mp, expr) \ 222 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \ 223 NULL, 0, __FILE__, __LINE__, \ 224 __this_address), \ 225 true : false) 226 227 #define STATIC static noinline 228 229 #ifdef CONFIG_XFS_RT 230 231 /* 232 * make sure we ignore the inode flag if the filesystem doesn't have a 233 * configured realtime device. 234 */ 235 #define XFS_IS_REALTIME_INODE(ip) \ 236 (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) && \ 237 (ip)->i_mount->m_rtdev_targp) 238 #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0) 239 #else 240 #define XFS_IS_REALTIME_INODE(ip) (0) 241 #define XFS_IS_REALTIME_MOUNT(mp) (0) 242 #endif 243 244 /* 245 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier 246 * prints a hashed version of the pointer to avoid leaking kernel 247 * pointers into dmesg. If we're trying to debug the kernel we want the 248 * raw values, so override this behavior as best we can. 249 */ 250 #ifdef DEBUG 251 # define PTR_FMT "%px" 252 #else 253 # define PTR_FMT "%p" 254 #endif 255 256 #endif /* __XFS_LINUX__ */ 257