Line data Source code
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/filelock.h>
38 : #include <linux/swap.h>
39 : #include <linux/errno.h>
40 : #include <linux/sched/signal.h>
41 : #include <linux/bitops.h>
42 : #include <linux/major.h>
43 : #include <linux/pagemap.h>
44 : #include <linux/vfs.h>
45 : #include <linux/seq_file.h>
46 : #include <linux/init.h>
47 : #include <linux/list.h>
48 : #include <linux/proc_fs.h>
49 : #include <linux/sort.h>
50 : #include <linux/cpu.h>
51 : #include <linux/notifier.h>
52 : #include <linux/delay.h>
53 : #include <linux/log2.h>
54 : #include <linux/spinlock.h>
55 : #include <linux/random.h>
56 : #include <linux/ctype.h>
57 : #include <linux/writeback.h>
58 : #include <linux/capability.h>
59 : #include <linux/kthread.h>
60 : #include <linux/freezer.h>
61 : #include <linux/list_sort.h>
62 : #include <linux/ratelimit.h>
63 : #include <linux/rhashtable.h>
64 : #include <linux/xattr.h>
65 : #include <linux/mnt_idmapping.h>
66 : #include <linux/debugfs.h>
67 :
68 : #include <asm/page.h>
69 : #include <asm/div64.h>
70 : #include <asm/param.h>
71 : #include <linux/uaccess.h>
72 : #include <asm/byteorder.h>
73 : #include <asm/unaligned.h>
74 :
75 : #include "xfs_fs.h"
76 : #include "xfs_fs_staging.h"
77 : #include "xfs_stats.h"
78 : #include "xfs_sysctl.h"
79 : #include "xfs_iops.h"
80 : #include "xfs_aops.h"
81 : #include "xfs_super.h"
82 : #include "xfs_cksum.h"
83 : #include "xfs_buf.h"
84 : #include "xfs_message.h"
85 : #include "xfs_drain.h"
86 : #include "xfs_hooks.h"
87 :
88 : #ifdef __BIG_ENDIAN
89 : #define XFS_NATIVE_HOST 1
90 : #else
91 : #undef XFS_NATIVE_HOST
92 : #endif
93 :
94 : #define irix_sgid_inherit xfs_params.sgid_inherit.val
95 : #define irix_symlink_mode xfs_params.symlink_mode.val
96 : #define xfs_panic_mask xfs_params.panic_mask.val
97 : #define xfs_error_level xfs_params.error_level.val
98 : #define xfs_syncd_centisecs xfs_params.syncd_timer.val
99 : #define xfs_stats_clear xfs_params.stats_clear.val
100 : #define xfs_inherit_sync xfs_params.inherit_sync.val
101 : #define xfs_inherit_nodump xfs_params.inherit_nodump.val
102 : #define xfs_inherit_noatime xfs_params.inherit_noatim.val
103 : #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
104 : #define xfs_rotorstep xfs_params.rotorstep.val
105 : #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
106 : #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
107 : #define xfs_blockgc_secs xfs_params.blockgc_timer.val
108 :
109 : #define current_cpu() (raw_smp_processor_id())
110 : #define current_set_flags_nested(sp, f) \
111 : (*(sp) = current->flags, current->flags |= (f))
112 : #define current_restore_flags_nested(sp, f) \
113 : (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
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 __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 howmany(x, y) (((x)+((y)-1))/(y))
141 :
142 : static inline void delay(long ticks)
143 : {
144 2437783 : schedule_timeout_uninterruptible(ticks);
145 13120 : }
146 :
147 : /*
148 : * XFS wrapper structure for sysfs support. It depends on external data
149 : * structures and is embedded in various internal data structures to implement
150 : * the XFS sysfs object heirarchy. Define it here for broad access throughout
151 : * the codebase.
152 : */
153 : struct xfs_kobj {
154 : struct kobject kobject;
155 : struct completion complete;
156 : };
157 :
158 : struct xstats {
159 : struct xfsstats __percpu *xs_stats;
160 : struct xfs_kobj xs_kobj;
161 : };
162 :
163 : extern struct xstats xfsstats;
164 :
165 : static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
166 : {
167 124993801 : return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
168 : }
169 :
170 : static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
171 : {
172 14314522 : return sysv_encode_dev(dev);
173 : }
174 :
175 : /*
176 : * Various platform dependent calls that don't fit anywhere else
177 : */
178 : #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
179 : #define xfs_stack_trace() dump_stack()
180 :
181 424457503 : static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
182 : {
183 424457503 : do_div(x, y);
184 424457503 : return x * y;
185 : }
186 :
187 162781986 : static inline uint64_t roundup_64(uint64_t x, uint32_t y)
188 : {
189 162781986 : x += y - 1;
190 162781986 : do_div(x, y);
191 162781986 : return x * y;
192 : }
193 :
194 66103893 : static inline uint64_t howmany_64(uint64_t x, uint32_t y)
195 : {
196 2940245824 : x += y - 1;
197 2940245824 : do_div(x, y);
198 2940245824 : return x;
199 : }
200 :
201 43449745 : static inline bool isaligned_64(uint64_t x, uint32_t y)
202 : {
203 43449745 : return do_div(x, y) == 0;
204 : }
205 :
206 : /* If @b is a power of 2, return log2(b). Else return -1. */
207 133966 : static inline int8_t log2_if_power2(unsigned long b)
208 : {
209 267932 : return is_power_of_2(b) ? ilog2(b) : -1;
210 : }
211 :
212 : /* If @b is a power of 2, return a mask of the lower bits, else return zero. */
213 : static inline unsigned long long mask64_if_power2(unsigned long b)
214 : {
215 200950 : return is_power_of_2(b) ? b - 1 : 0;
216 : }
217 :
218 : int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
219 : char *data, enum req_op op);
220 :
221 : #define ASSERT_ALWAYS(expr) \
222 : (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
223 :
224 : #ifdef DEBUG
225 : #define ASSERT(expr) \
226 : (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
227 :
228 : #else /* !DEBUG */
229 :
230 : #ifdef XFS_WARN
231 :
232 : #define ASSERT(expr) \
233 : (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
234 :
235 : #else /* !DEBUG && !XFS_WARN */
236 :
237 : #define ASSERT(expr) ((void)0)
238 :
239 : #endif /* XFS_WARN */
240 : #endif /* DEBUG */
241 :
242 : #define XFS_IS_CORRUPT(mp, expr) \
243 : (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
244 : NULL, 0, __FILE__, __LINE__, \
245 : __this_address), \
246 : true : false)
247 :
248 : #define STATIC static noinline
249 :
250 : #ifdef CONFIG_XFS_RT
251 :
252 : /*
253 : * make sure we ignore the inode flag if the filesystem doesn't have a
254 : * configured realtime device.
255 : */
256 : #define XFS_IS_REALTIME_INODE(ip) \
257 : (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
258 : (ip)->i_mount->m_rtdev_targp)
259 : #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
260 : #else
261 : #define XFS_IS_REALTIME_INODE(ip) (0)
262 : #define XFS_IS_REALTIME_MOUNT(mp) (0)
263 : #endif
264 :
265 : /*
266 : * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
267 : * prints a hashed version of the pointer to avoid leaking kernel
268 : * pointers into dmesg. If we're trying to debug the kernel we want the
269 : * raw values, so override this behavior as best we can.
270 : */
271 : #ifdef DEBUG
272 : # define PTR_FMT "%px"
273 : #else
274 : # define PTR_FMT "%p"
275 : #endif
276 :
277 : #endif /* __XFS_LINUX__ */
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