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_blockgc_secs xfs_params.blockgc_timer.val
102
103 #define current_cpu() (raw_smp_processor_id())
104 #define current_set_flags_nested(sp, f) \
105 (*(sp) = current->flags, current->flags |= (f))
106 #define current_restore_flags_nested(sp, f) \
107 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
108
109 #define NBBY 8 /* number of bits per byte */
110
111 /*
112 * Size of block device i/o is parameterized here.
113 * Currently the system supports page-sized i/o.
114 */
115 #define BLKDEV_IOSHIFT PAGE_SHIFT
116 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
117 /* number of BB's per block device block */
118 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
119
120 #define ENOATTR ENODATA /* Attribute not found */
121 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
122 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
123 #define EFSBADCRC EBADMSG /* Bad CRC detected */
124
125 #define __return_address __builtin_return_address(0)
126
127 /*
128 * Return the address of a label. Use barrier() so that the optimizer
129 * won't reorder code to refactor the error jumpouts into a single
130 * return, which throws off the reported address.
131 */
132 #define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
133
134 #define XFS_PROJID_DEFAULT 0
135
136 #define howmany(x, y) (((x)+((y)-1))/(y))
137
delay(long ticks)138 static inline void delay(long ticks)
139 {
140 schedule_timeout_uninterruptible(ticks);
141 }
142
143 /*
144 * XFS wrapper structure for sysfs support. It depends on external data
145 * structures and is embedded in various internal data structures to implement
146 * the XFS sysfs object heirarchy. Define it here for broad access throughout
147 * the codebase.
148 */
149 struct xfs_kobj {
150 struct kobject kobject;
151 struct completion complete;
152 };
153
154 struct xstats {
155 struct xfsstats __percpu *xs_stats;
156 struct xfs_kobj xs_kobj;
157 };
158
159 extern struct xstats xfsstats;
160
xfs_to_linux_dev_t(xfs_dev_t dev)161 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
162 {
163 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
164 }
165
linux_to_xfs_dev_t(dev_t dev)166 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
167 {
168 return sysv_encode_dev(dev);
169 }
170
171 /*
172 * Various platform dependent calls that don't fit anywhere else
173 */
174 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
175 #define xfs_stack_trace() dump_stack()
176
rounddown_64(uint64_t x,uint32_t y)177 static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
178 {
179 do_div(x, y);
180 return x * y;
181 }
182
roundup_64(uint64_t x,uint32_t y)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
howmany_64(uint64_t x,uint32_t y)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_diflags & 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