fs/xfs/xfs_linux.h

   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 spinlock_destroy(lock)
 114
 115 #define NBBY            8               /* number of bits per byte */
 116
 117 /*
 118  * Size of block device i/o is parameterized here.
 119  * Currently the system supports page-sized i/o.
 120  */
 121 #define BLKDEV_IOSHIFT          PAGE_SHIFT
 122 #define BLKDEV_IOSIZE           (1<<BLKDEV_IOSHIFT)
 123 /* number of BB's per block device block */
 124 #define BLKDEV_BB               BTOBB(BLKDEV_IOSIZE)
 125
 126 #define ENOATTR         ENODATA         /* Attribute not found */
 127 #define EWRONGFS        EINVAL          /* Mount with wrong filesystem type */
 128 #define EFSCORRUPTED    EUCLEAN         /* Filesystem is corrupted */
 129 #define EFSBADCRC       EBADMSG         /* Bad CRC detected */
 130
 131 #define SYNCHRONIZE()   barrier()
 132 #define __return_address __builtin_return_address(0)
 133
 134 /*
 135  * Return the address of a label.  Use barrier() so that the optimizer
 136  * won't reorder code to refactor the error jumpouts into a single
 137  * return, which throws off the reported address.
 138  */
 139 #define __this_address  ({ __label__ __here; __here: barrier(); &&__here; })
 140
 141 #define XFS_PROJID_DEFAULT      0
 142
 143 #define howmany(x, y)   (((x)+((y)-1))/(y))
 144
 145 static inline void delay(long ticks)
 146 {
 147         schedule_timeout_uninterruptible(ticks);
 148 }
 149
 150 /*
 151  * XFS wrapper structure for sysfs support. It depends on external data
 152  * structures and is embedded in various internal data structures to implement
 153  * the XFS sysfs object heirarchy. Define it here for broad access throughout
 154  * the codebase.
 155  */
 156 struct xfs_kobj {
 157         struct kobject          kobject;
 158         struct completion       complete;
 159 };
 160
 161 struct xstats {
 162         struct xfsstats __percpu        *xs_stats;
 163         struct xfs_kobj                 xs_kobj;
 164 };
 165
 166 extern struct xstats xfsstats;
 167
 168 /* Kernel uid/gid conversion. These are used to convert to/from the on disk
 169  * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
 170  * The conversion here is type only, the value will remain the same since we
 171  * are converting to the init_user_ns. The uid is later mapped to a particular
 172  * user namespace value when crossing the kernel/user boundary.
 173  */
 174 static inline uint32_t xfs_kuid_to_uid(kuid_t uid)
 175 {
 176         return from_kuid(&init_user_ns, uid);
 177 }
 178
 179 static inline kuid_t xfs_uid_to_kuid(uint32_t uid)
 180 {
 181         return make_kuid(&init_user_ns, uid);
 182 }
 183
 184 static inline uint32_t xfs_kgid_to_gid(kgid_t gid)
 185 {
 186         return from_kgid(&init_user_ns, gid);
 187 }
 188
 189 static inline kgid_t xfs_gid_to_kgid(uint32_t gid)
 190 {
 191         return make_kgid(&init_user_ns, gid);
 192 }
 193
 194 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
 195 {
 196         return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
 197 }
 198
 199 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
 200 {
 201         return sysv_encode_dev(dev);
 202 }
 203
 204 /*
 205  * Various platform dependent calls that don't fit anywhere else
 206  */
 207 #define xfs_sort(a,n,s,fn)      sort(a,n,s,fn,NULL)
 208 #define xfs_stack_trace()       dump_stack()
 209
 210 static inline uint64_t roundup_64(uint64_t x, uint32_t y)
 211 {
 212         x += y - 1;
 213         do_div(x, y);
 214         return x * y;
 215 }
 216
 217 static inline uint64_t howmany_64(uint64_t x, uint32_t y)
 218 {
 219         x += y - 1;
 220         do_div(x, y);
 221         return x;
 222 }
 223
 224 #define ASSERT_ALWAYS(expr)     \
 225         (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
 226
 227 #ifdef DEBUG
 228 #define ASSERT(expr)    \
 229         (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
 230
 231 #else   /* !DEBUG */
 232
 233 #ifdef XFS_WARN
 234
 235 #define ASSERT(expr)    \
 236         (likely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
 237
 238 #else   /* !DEBUG && !XFS_WARN */
 239
 240 #define ASSERT(expr)    ((void)0)
 241
 242 #endif /* XFS_WARN */
 243 #endif /* DEBUG */
 244
 245 #define STATIC static noinline
 246
 247 #ifdef CONFIG_XFS_RT
 248
 249 /*
 250  * make sure we ignore the inode flag if the filesystem doesn't have a
 251  * configured realtime device.
 252  */
 253 #define XFS_IS_REALTIME_INODE(ip)                       \
 254         (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) &&  \
 255          (ip)->i_mount->m_rtdev_targp)
 256 #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
 257 #else
 258 #define XFS_IS_REALTIME_INODE(ip) (0)
 259 #define XFS_IS_REALTIME_MOUNT(mp) (0)
 260 #endif
 261
 262 /*
 263  * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
 264  * prints a hashed version of the pointer to avoid leaking kernel
 265  * pointers into dmesg.  If we're trying to debug the kernel we want the
 266  * raw values, so override this behavior as best we can.
 267  */
 268 #ifdef DEBUG
 269 # define PTR_FMT "%px"
 270 #else
 271 # define PTR_FMT "%p"
 272 #endif
 273
 274 #endif /* __XFS_LINUX__ */