Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
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 irix_sgid_inherit xfs_params.sgid_inherit.val
93#define irix_symlink_mode xfs_params.symlink_mode.val
94#define xfs_panic_mask xfs_params.panic_mask.val
95#define xfs_error_level xfs_params.error_level.val
96#define xfs_syncd_centisecs xfs_params.syncd_timer.val
97#define xfs_stats_clear xfs_params.stats_clear.val
98#define xfs_inherit_sync xfs_params.inherit_sync.val
99#define xfs_inherit_nodump xfs_params.inherit_nodump.val
100#define xfs_inherit_noatime xfs_params.inherit_noatim.val
101#define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
102#define xfs_rotorstep xfs_params.rotorstep.val
103#define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
104#define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
105#define xfs_blockgc_secs xfs_params.blockgc_timer.val
106
107#define current_cpu() (raw_smp_processor_id())
108#define current_set_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 __return_address __builtin_return_address(0)
130
131/*
132 * Return the address of a label. Use barrier() so that the optimizer
133 * won't reorder code to refactor the error jumpouts into a single
134 * return, which throws off the reported address.
135 */
136#define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
137
138#define howmany(x, y) (((x)+((y)-1))/(y))
139
140static inline void delay(long ticks)
141{
142 schedule_timeout_uninterruptible(ticks);
143}
144
145/*
146 * XFS wrapper structure for sysfs support. It depends on external data
147 * structures and is embedded in various internal data structures to implement
148 * the XFS sysfs object heirarchy. Define it here for broad access throughout
149 * the codebase.
150 */
151struct xfs_kobj {
152 struct kobject kobject;
153 struct completion complete;
154};
155
156struct xstats {
157 struct xfsstats __percpu *xs_stats;
158 struct xfs_kobj xs_kobj;
159};
160
161extern struct xstats xfsstats;
162
163static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
164{
165 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
166}
167
168static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
169{
170 return sysv_encode_dev(dev);
171}
172
173/*
174 * Various platform dependent calls that don't fit anywhere else
175 */
176#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
177#define xfs_stack_trace() dump_stack()
178
179static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
180{
181 do_div(x, y);
182 return x * y;
183}
184
185static inline uint64_t roundup_64(uint64_t x, uint32_t y)
186{
187 x += y - 1;
188 do_div(x, y);
189 return x * y;
190}
191
192static inline uint64_t howmany_64(uint64_t x, uint32_t y)
193{
194 x += y - 1;
195 do_div(x, y);
196 return x;
197}
198
199static inline bool isaligned_64(uint64_t x, uint32_t y)
200{
201 return do_div(x, y) == 0;
202}
203
204/* If @b is a power of 2, return log2(b). Else return -1. */
205static inline int8_t log2_if_power2(unsigned long b)
206{
207 return is_power_of_2(b) ? ilog2(b) : -1;
208}
209
210/* If @b is a power of 2, return a mask of the lower bits, else return zero. */
211static inline unsigned long long mask64_if_power2(unsigned long b)
212{
213 return is_power_of_2(b) ? b - 1 : 0;
214}
215
216int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
217 char *data, enum req_op op);
218
219#define ASSERT_ALWAYS(expr) \
220 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
221
222#ifdef DEBUG
223#define ASSERT(expr) \
224 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
225
226#else /* !DEBUG */
227
228#ifdef XFS_WARN
229
230#define ASSERT(expr) \
231 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
232
233#else /* !DEBUG && !XFS_WARN */
234
235#define ASSERT(expr) ((void)0)
236
237#endif /* XFS_WARN */
238#endif /* DEBUG */
239
240#define XFS_IS_CORRUPT(mp, expr) \
241 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
242 NULL, 0, __FILE__, __LINE__, \
243 __this_address), \
244 true : false)
245
246#define STATIC static noinline
247
248#ifdef CONFIG_XFS_RT
249
250/*
251 * make sure we ignore the inode flag if the filesystem doesn't have a
252 * configured realtime device.
253 */
254#define XFS_IS_REALTIME_INODE(ip) \
255 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
256 (ip)->i_mount->m_rtdev_targp)
257#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
258#else
259#define XFS_IS_REALTIME_INODE(ip) (0)
260#define XFS_IS_REALTIME_MOUNT(mp) (0)
261#endif
262
263/*
264 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
265 * prints a hashed version of the pointer to avoid leaking kernel
266 * pointers into dmesg. If we're trying to debug the kernel we want the
267 * raw values, so override this behavior as best we can.
268 */
269#ifdef DEBUG
270# define PTR_FMT "%px"
271#else
272# define PTR_FMT "%p"
273#endif
274
275/*
276 * Helper for IO routines to grab backing pages from allocated kernel memory.
277 */
278static inline struct page *
279kmem_to_page(void *addr)
280{
281 if (is_vmalloc_addr(addr))
282 return vmalloc_to_page(addr);
283 return virt_to_page(addr);
284}
285
286#endif /* __XFS_LINUX__ */