Linux kernel mirror (for testing)
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linux
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
16typedef __s64 xfs_off_t; /* <file offset> type */
17typedef unsigned long long xfs_ino_t; /* <inode> type */
18typedef __s64 xfs_daddr_t; /* <disk address> type */
19typedef __u32 xfs_dev_t;
20typedef __u32 xfs_nlink_t;
21
22#include "xfs_types.h"
23
24#include <linux/semaphore.h>
25#include <linux/mm.h>
26#include <linux/sched/mm.h>
27#include <linux/kernel.h>
28#include <linux/blkdev.h>
29#include <linux/slab.h>
30#include <linux/vmalloc.h>
31#include <linux/crc32c.h>
32#include <linux/module.h>
33#include <linux/mutex.h>
34#include <linux/file.h>
35#include <linux/filelock.h>
36#include <linux/swap.h>
37#include <linux/errno.h>
38#include <linux/sched/signal.h>
39#include <linux/bitops.h>
40#include <linux/major.h>
41#include <linux/pagemap.h>
42#include <linux/vfs.h>
43#include <linux/seq_file.h>
44#include <linux/init.h>
45#include <linux/list.h>
46#include <linux/proc_fs.h>
47#include <linux/sort.h>
48#include <linux/cpu.h>
49#include <linux/notifier.h>
50#include <linux/delay.h>
51#include <linux/log2.h>
52#include <linux/rwsem.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#include <linux/mnt_idmapping.h>
65#include <linux/debugfs.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 <linux/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#include "xfs_hooks.h"
85
86#ifdef __BIG_ENDIAN
87#define XFS_NATIVE_HOST 1
88#else
89#undef XFS_NATIVE_HOST
90#endif
91
92#define xfs_panic_mask xfs_params.panic_mask.val
93#define xfs_error_level xfs_params.error_level.val
94#define xfs_syncd_centisecs xfs_params.syncd_timer.val
95#define xfs_stats_clear xfs_params.stats_clear.val
96#define xfs_inherit_sync xfs_params.inherit_sync.val
97#define xfs_inherit_nodump xfs_params.inherit_nodump.val
98#define xfs_inherit_noatime xfs_params.inherit_noatim.val
99#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
100#define xfs_rotorstep xfs_params.rotorstep.val
101#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
102#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
103#define xfs_blockgc_secs xfs_params.blockgc_timer.val
104
105#define current_cpu() (raw_smp_processor_id())
106#define current_set_flags_nested(sp, f) \
107 (*(sp) = current->flags, current->flags |= (f))
108#define current_restore_flags_nested(sp, f) \
109 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
110
111#define NBBY 8 /* number of bits per byte */
112
113/*
114 * Size of block device i/o is parameterized here.
115 * Currently the system supports page-sized i/o.
116 */
117#define BLKDEV_IOSHIFT PAGE_SHIFT
118#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
119/* number of BB's per block device block */
120#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
121
122#define ENOATTR ENODATA /* Attribute not found */
123#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
124#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
125#define EFSBADCRC EBADMSG /* Bad CRC detected */
126
127#define __return_address __builtin_return_address(0)
128
129/*
130 * Return the address of a label. Use barrier() so that the optimizer
131 * won't reorder code to refactor the error jumpouts into a single
132 * return, which throws off the reported address.
133 */
134#define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
135
136#define howmany(x, y) (((x)+((y)-1))/(y))
137
138static 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 */
149struct xfs_kobj {
150 struct kobject kobject;
151 struct completion complete;
152};
153
154struct xstats {
155 struct xfsstats __percpu *xs_stats;
156 struct xfs_kobj xs_kobj;
157};
158
159extern struct xstats xfsstats;
160
161static 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
166static 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
177static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
178{
179 do_div(x, y);
180 return x * y;
181}
182
183static 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
190static 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
197static inline bool isaligned_64(uint64_t x, uint32_t y)
198{
199 return do_div(x, y) == 0;
200}
201
202/* If @b is a power of 2, return log2(b). Else return -1. */
203static inline int8_t log2_if_power2(unsigned long b)
204{
205 return is_power_of_2(b) ? ilog2(b) : -1;
206}
207
208/* If @b is a power of 2, return a mask of the lower bits, else return zero. */
209static inline unsigned long long mask64_if_power2(unsigned long b)
210{
211 return is_power_of_2(b) ? b - 1 : 0;
212}
213
214int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
215 char *data, enum req_op op);
216
217#define ASSERT_ALWAYS(expr) \
218 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
219
220#ifdef DEBUG
221#define ASSERT(expr) \
222 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
223
224#else /* !DEBUG */
225
226#ifdef XFS_WARN
227
228#define ASSERT(expr) \
229 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
230
231#else /* !DEBUG && !XFS_WARN */
232
233#define ASSERT(expr) ((void)0)
234
235#endif /* XFS_WARN */
236#endif /* DEBUG */
237
238#define XFS_IS_CORRUPT(mp, expr) \
239 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
240 NULL, 0, __FILE__, __LINE__, \
241 __this_address), \
242 true : false)
243
244#define STATIC static noinline
245
246#ifdef CONFIG_XFS_RT
247
248/*
249 * make sure we ignore the inode flag if the filesystem doesn't have a
250 * configured realtime device.
251 */
252#define XFS_IS_REALTIME_INODE(ip) \
253 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
254 (ip)->i_mount->m_rtdev_targp)
255#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
256#else
257#define XFS_IS_REALTIME_INODE(ip) (0)
258#define XFS_IS_REALTIME_MOUNT(mp) (0)
259#endif
260
261/*
262 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
263 * prints a hashed version of the pointer to avoid leaking kernel
264 * pointers into dmesg. If we're trying to debug the kernel we want the
265 * raw values, so override this behavior as best we can.
266 */
267#ifdef DEBUG
268# define PTR_FMT "%px"
269#else
270# define PTR_FMT "%p"
271#endif
272
273/*
274 * Helper for IO routines to grab backing pages from allocated kernel memory.
275 */
276static inline struct page *
277kmem_to_page(void *addr)
278{
279 if (is_vmalloc_addr(addr))
280 return vmalloc_to_page(addr);
281 return virt_to_page(addr);
282}
283
284#endif /* __XFS_LINUX__ */