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 :
67 : #include <asm/page.h>
68 : #include <asm/div64.h>
69 : #include <asm/param.h>
70 : #include <linux/uaccess.h>
71 : #include <asm/byteorder.h>
72 : #include <asm/unaligned.h>
73 :
74 : #include "xfs_fs.h"
75 : #include "xfs_stats.h"
76 : #include "xfs_sysctl.h"
77 : #include "xfs_iops.h"
78 : #include "xfs_aops.h"
79 : #include "xfs_super.h"
80 : #include "xfs_cksum.h"
81 : #include "xfs_buf.h"
82 : #include "xfs_message.h"
83 : #include "xfs_drain.h"
84 :
85 : #ifdef __BIG_ENDIAN
86 : #define XFS_NATIVE_HOST 1
87 : #else
88 : #undef XFS_NATIVE_HOST
89 : #endif
90 :
91 : #define irix_sgid_inherit xfs_params.sgid_inherit.val
92 : #define irix_symlink_mode xfs_params.symlink_mode.val
93 : #define xfs_panic_mask xfs_params.panic_mask.val
94 : #define xfs_error_level xfs_params.error_level.val
95 : #define xfs_syncd_centisecs xfs_params.syncd_timer.val
96 : #define xfs_stats_clear xfs_params.stats_clear.val
97 : #define xfs_inherit_sync xfs_params.inherit_sync.val
98 : #define xfs_inherit_nodump xfs_params.inherit_nodump.val
99 : #define xfs_inherit_noatime xfs_params.inherit_noatim.val
100 : #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
101 : #define xfs_rotorstep xfs_params.rotorstep.val
102 : #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
103 : #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
104 : #define xfs_blockgc_secs xfs_params.blockgc_timer.val
105 :
106 : #define current_cpu() (raw_smp_processor_id())
107 : #define current_set_flags_nested(sp, f) \
108 : (*(sp) = current->flags, current->flags |= (f))
109 : #define current_restore_flags_nested(sp, f) \
110 : (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
111 :
112 : #define NBBY 8 /* number of bits per byte */
113 :
114 : /*
115 : * Size of block device i/o is parameterized here.
116 : * Currently the system supports page-sized i/o.
117 : */
118 : #define BLKDEV_IOSHIFT PAGE_SHIFT
119 : #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
120 : /* number of BB's per block device block */
121 : #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
122 :
123 : #define ENOATTR ENODATA /* Attribute not found */
124 : #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
125 : #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
126 : #define EFSBADCRC EBADMSG /* Bad CRC detected */
127 :
128 : #define __return_address __builtin_return_address(0)
129 :
130 : /*
131 : * Return the address of a label. Use barrier() so that the optimizer
132 : * won't reorder code to refactor the error jumpouts into a single
133 : * return, which throws off the reported address.
134 : */
135 : #define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
136 :
137 : #define XFS_PROJID_DEFAULT 0
138 :
139 : #define howmany(x, y) (((x)+((y)-1))/(y))
140 :
141 : static inline void delay(long ticks)
142 : {
143 1141122 : schedule_timeout_uninterruptible(ticks);
144 6411 : }
145 :
146 : /*
147 : * XFS wrapper structure for sysfs support. It depends on external data
148 : * structures and is embedded in various internal data structures to implement
149 : * the XFS sysfs object heirarchy. Define it here for broad access throughout
150 : * the codebase.
151 : */
152 : struct xfs_kobj {
153 : struct kobject kobject;
154 : struct completion complete;
155 : };
156 :
157 : struct xstats {
158 : struct xfsstats __percpu *xs_stats;
159 : struct xfs_kobj xs_kobj;
160 : };
161 :
162 : extern struct xstats xfsstats;
163 :
164 : static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
165 : {
166 146778864 : return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
167 : }
168 :
169 : static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
170 : {
171 4191467 : return sysv_encode_dev(dev);
172 : }
173 :
174 : /*
175 : * Various platform dependent calls that don't fit anywhere else
176 : */
177 : #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
178 : #define xfs_stack_trace() dump_stack()
179 :
180 28 : static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
181 : {
182 28 : do_div(x, y);
183 28 : return x * y;
184 : }
185 :
186 5385270 : static inline uint64_t roundup_64(uint64_t x, uint32_t y)
187 : {
188 5385270 : x += y - 1;
189 5385270 : do_div(x, y);
190 5385270 : return x * y;
191 : }
192 :
193 35099667 : static inline uint64_t howmany_64(uint64_t x, uint32_t y)
194 : {
195 35099674 : x += y - 1;
196 35099674 : do_div(x, y);
197 35099674 : return x;
198 : }
199 :
200 : int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
201 : char *data, enum req_op op);
202 :
203 : #define ASSERT_ALWAYS(expr) \
204 : (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
205 :
206 : #ifdef DEBUG
207 : #define ASSERT(expr) \
208 : (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
209 :
210 : #else /* !DEBUG */
211 :
212 : #ifdef XFS_WARN
213 :
214 : #define ASSERT(expr) \
215 : (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
216 :
217 : #else /* !DEBUG && !XFS_WARN */
218 :
219 : #define ASSERT(expr) ((void)0)
220 :
221 : #endif /* XFS_WARN */
222 : #endif /* DEBUG */
223 :
224 : #define XFS_IS_CORRUPT(mp, expr) \
225 : (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
226 : NULL, 0, __FILE__, __LINE__, \
227 : __this_address), \
228 : true : false)
229 :
230 : #define STATIC static noinline
231 :
232 : #ifdef CONFIG_XFS_RT
233 :
234 : /*
235 : * make sure we ignore the inode flag if the filesystem doesn't have a
236 : * configured realtime device.
237 : */
238 : #define XFS_IS_REALTIME_INODE(ip) \
239 : (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
240 : (ip)->i_mount->m_rtdev_targp)
241 : #define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
242 : #else
243 : #define XFS_IS_REALTIME_INODE(ip) (0)
244 : #define XFS_IS_REALTIME_MOUNT(mp) (0)
245 : #endif
246 :
247 : /*
248 : * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
249 : * prints a hashed version of the pointer to avoid leaking kernel
250 : * pointers into dmesg. If we're trying to debug the kernel we want the
251 : * raw values, so override this behavior as best we can.
252 : */
253 : #ifdef DEBUG
254 : # define PTR_FMT "%px"
255 : #else
256 : # define PTR_FMT "%p"
257 : #endif
258 :
259 : #endif /* __XFS_LINUX__ */
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