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#include <linux/debugfs.h>
67
68#include <asm/page.h>
69#include <asm/div64.h>
70#include <asm/param.h>
71#include <linux/uaccess.h>
72#include <asm/byteorder.h>
73#include <asm/unaligned.h>
74
75#include "xfs_fs.h"
76#include "xfs_stats.h"
77#include "xfs_sysctl.h"
78#include "xfs_iops.h"
79#include "xfs_aops.h"
80#include "xfs_super.h"
81#include "xfs_cksum.h"
82#include "xfs_buf.h"
83#include "xfs_message.h"
84#include "xfs_drain.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 XFS_PROJID_DEFAULT 0
139
140#define howmany(x, y) (((x)+((y)-1))/(y))
141
142static inline void delay(long ticks)
143{
144 schedule_timeout_uninterruptible(timeout: ticks);
145}
146
147/*
148 * XFS wrapper structure for sysfs support. It depends on external data
149 * structures and is embedded in various internal data structures to implement
150 * the XFS sysfs object heirarchy. Define it here for broad access throughout
151 * the codebase.
152 */
153struct xfs_kobj {
154 struct kobject kobject;
155 struct completion complete;
156};
157
158struct xstats {
159 struct xfsstats __percpu *xs_stats;
160 struct xfs_kobj xs_kobj;
161};
162
163extern struct xstats xfsstats;
164
165static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
166{
167 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
168}
169
170static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
171{
172 return sysv_encode_dev(dev);
173}
174
175/*
176 * Various platform dependent calls that don't fit anywhere else
177 */
178#define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
179#define xfs_stack_trace() dump_stack()
180
181static inline uint64_t rounddown_64(uint64_t x, uint32_t y)
182{
183 do_div(x, y);
184 return x * y;
185}
186
187static inline uint64_t roundup_64(uint64_t x, uint32_t y)
188{
189 x += y - 1;
190 do_div(x, y);
191 return x * y;
192}
193
194static inline uint64_t howmany_64(uint64_t x, uint32_t y)
195{
196 x += y - 1;
197 do_div(x, y);
198 return x;
199}
200
201/* If @b is a power of 2, return log2(b). Else return -1. */
202static inline int8_t log2_if_power2(unsigned long b)
203{
204 return is_power_of_2(n: b) ? ilog2(b) : -1;
205}
206
207/* If @b is a power of 2, return a mask of the lower bits, else return zero. */
208static inline unsigned long long mask64_if_power2(unsigned long b)
209{
210 return is_power_of_2(n: b) ? b - 1 : 0;
211}
212
213int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
214 char *data, enum req_op op);
215
216#define ASSERT_ALWAYS(expr) \
217 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
218
219#ifdef DEBUG
220#define ASSERT(expr) \
221 (likely(expr) ? (void)0 : assfail(NULL, #expr, __FILE__, __LINE__))
222
223#else /* !DEBUG */
224
225#ifdef XFS_WARN
226
227#define ASSERT(expr) \
228 (likely(expr) ? (void)0 : asswarn(NULL, #expr, __FILE__, __LINE__))
229
230#else /* !DEBUG && !XFS_WARN */
231
232#define ASSERT(expr) ((void)0)
233
234#endif /* XFS_WARN */
235#endif /* DEBUG */
236
237#define XFS_IS_CORRUPT(mp, expr) \
238 (unlikely(expr) ? xfs_corruption_error(#expr, XFS_ERRLEVEL_LOW, (mp), \
239 NULL, 0, __FILE__, __LINE__, \
240 __this_address), \
241 true : false)
242
243#define STATIC static noinline
244
245#ifdef CONFIG_XFS_RT
246
247/*
248 * make sure we ignore the inode flag if the filesystem doesn't have a
249 * configured realtime device.
250 */
251#define XFS_IS_REALTIME_INODE(ip) \
252 (((ip)->i_diflags & XFS_DIFLAG_REALTIME) && \
253 (ip)->i_mount->m_rtdev_targp)
254#define XFS_IS_REALTIME_MOUNT(mp) ((mp)->m_rtdev_targp ? 1 : 0)
255#else
256#define XFS_IS_REALTIME_INODE(ip) (0)
257#define XFS_IS_REALTIME_MOUNT(mp) (0)
258#endif
259
260/*
261 * Starting in Linux 4.15, the %p (raw pointer value) printk modifier
262 * prints a hashed version of the pointer to avoid leaking kernel
263 * pointers into dmesg. If we're trying to debug the kernel we want the
264 * raw values, so override this behavior as best we can.
265 */
266#ifdef DEBUG
267# define PTR_FMT "%px"
268#else
269# define PTR_FMT "%p"
270#endif
271
272#endif /* __XFS_LINUX__ */
273

source code of linux/fs/xfs/xfs_linux.h