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/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 spinlock_destroy(lock)
114
115#define NBBY 8 /* number of bits per byte */
116
117/*
118 * Size of block device i/o is parameterized here.
119 * Currently the system supports page-sized i/o.
120 */
121#define BLKDEV_IOSHIFT PAGE_SHIFT
122#define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
123/* number of BB's per block device block */
124#define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
125
126#define ENOATTR ENODATA /* Attribute not found */
127#define EWRONGFS EINVAL /* Mount with wrong filesystem type */
128#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
129#define EFSBADCRC EBADMSG /* Bad CRC detected */
130
131#define SYNCHRONIZE() barrier()
132#define __return_address __builtin_return_address(0)
133
134/*
135 * Return the address of a label. Use barrier() so that the optimizer
136 * won't reorder code to refactor the error jumpouts into a single
137 * return, which throws off the reported address.
138 */
139#define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
140
141#define XFS_PROJID_DEFAULT 0
142
143#define howmany(x, y) (((x)+((y)-1))/(y))
144
145static inline void delay(long ticks)
146{
147 schedule_timeout_uninterruptible(ticks);
148}
149
150/*
151 * XFS wrapper structure for sysfs support. It depends on external data
152 * structures and is embedded in various internal data structures to implement
153 * the XFS sysfs object heirarchy. Define it here for broad access throughout
154 * the codebase.
155 */
156struct xfs_kobj {
157 struct kobject kobject;
158 struct completion complete;
159};
160
161struct xstats {
162 struct xfsstats __percpu *xs_stats;
163 struct xfs_kobj xs_kobj;
164};
165
166extern struct xstats xfsstats;
167
168/* Kernel uid/gid conversion. These are used to convert to/from the on disk
169 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
170 * The conversion here is type only, the value will remain the same since we
171 * are converting to the init_user_ns. The uid is later mapped to a particular
172 * user namespace value when crossing the kernel/user boundary.
173 */
174static inline uint32_t xfs_kuid_to_uid(kuid_t uid)
175{
176 return from_kuid(&init_user_ns, uid);
177}
178
179static inline kuid_t xfs_uid_to_kuid(uint32_t uid)
180{
181 return make_kuid(&init_user_ns, uid);
182}
183
184static inline uint32_t xfs_kgid_to_gid(kgid_t gid)
185{
186 return from_kgid(&init_user_ns, gid);
187}
188
189static inline kgid_t xfs_gid_to_kgid(uint32_t gid)
190{
191 return make_kgid(&init_user_ns, gid);
192}
193
194static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
195{
196 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
197}
198
199static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
200{
201 return sysv_encode_dev(dev);
202}
203
204/*
205 * Various platform dependent calls that don't fit anywhere else
206 */
207#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
208#define xfs_stack_trace() dump_stack()
209
210static inline uint64_t roundup_64(uint64_t x, uint32_t y)
211{
212 x += y - 1;
213 do_div(x, y);
214 return x * y;
215}
216
217static inline uint64_t howmany_64(uint64_t x, uint32_t y)
218{
219 x += y - 1;
220 do_div(x, y);
221 return x;
222}
223
224#define ASSERT_ALWAYS(expr) \
225 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
226
227#ifdef DEBUG
228#define ASSERT(expr) \
229 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
230
231#else /* !DEBUG */
232
233#ifdef XFS_WARN
234
235#define ASSERT(expr) \
236 (likely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
237
238#else /* !DEBUG && !XFS_WARN */
239
240#define ASSERT(expr) ((void)0)
241
242#endif /* XFS_WARN */
243#endif /* DEBUG */
244
245#define STATIC static noinline
246
247#ifdef CONFIG_XFS_RT
248
249/*
250 * make sure we ignore the inode flag if the filesystem doesn't have a
251 * configured realtime device.
252 */
253#define XFS_IS_REALTIME_INODE(ip) \
254 (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) && \
255 (ip)->i_mount->m_rtdev_targp)
256#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
257#else
258#define XFS_IS_REALTIME_INODE(ip) (0)
259#define XFS_IS_REALTIME_MOUNT(mp) (0)
260#endif
261
262/*
263 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
264 * prints a hashed version of the pointer to avoid leaking kernel
265 * pointers into dmesg. If we're trying to debug the kernel we want the
266 * raw values, so override this behavior as best we can.
267 */
268#ifdef DEBUG
269# define PTR_FMT "%px"
270#else
271# define PTR_FMT "%p"
272#endif
273
274#endif /* __XFS_LINUX__ */