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