tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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 "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
141static inline void delay(long ticks)
142{
143 schedule_timeout_uninterruptible(ticks);
144}
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 */
152struct xfs_kobj {
153 struct kobject kobject;
154 struct completion complete;
155};
156
157struct xstats {
158 struct xfsstats __percpu *xs_stats;
159 struct xfs_kobj xs_kobj;
160};
161
162extern struct xstats xfsstats;
163
164static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
165{
166 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
167}
168
169static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
170{
171 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
180static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
181{
182 do_div(x, y);
183 return x * y;
184}
185
186static inline uint64_t roundup_64(uint64_t x, uint32_t y)
187{
188 x += y - 1;
189 do_div(x, y);
190 return x * y;
191}
192
193static inline uint64_t howmany_64(uint64_t x, uint32_t y)
194{
195 x += y - 1;
196 do_div(x, y);
197 return x;
198}
199
200int 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__ */