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
16 typedef __s64 xfs_off_t; /* <file offset> type */
17 typedef unsigned long long xfs_ino_t; /* <inode> type */
18 typedef __s64 xfs_daddr_t; /* <disk address> type */
19 typedef __u32 xfs_dev_t;
20 typedef __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 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 SYNCHRONIZE() barrier()
130 #define __return_address __builtin_return_address(0)
131
132 /*
133 * Return the address of a label. Use barrier() so that the optimizer
134 * won't reorder code to refactor the error jumpouts into a single
135 * return, which throws off the reported address.
136 */
137 #define __this_address ({ __label__ __here; __here: barrier(); &&__here; })
138
139 #define XFS_PROJID_DEFAULT 0
140
141 #define howmany(x, y) (((x)+((y)-1))/(y))
142
delay(long ticks)143 static inline void delay(long ticks)
144 {
145 schedule_timeout_uninterruptible(ticks);
146 }
147
148 /*
149 * XFS wrapper structure for sysfs support. It depends on external data
150 * structures and is embedded in various internal data structures to implement
151 * the XFS sysfs object heirarchy. Define it here for broad access throughout
152 * the codebase.
153 */
154 struct xfs_kobj {
155 struct kobject kobject;
156 struct completion complete;
157 };
158
159 struct xstats {
160 struct xfsstats __percpu *xs_stats;
161 struct xfs_kobj xs_kobj;
162 };
163
164 extern struct xstats xfsstats;
165
166 /* Kernel uid/gid conversion. These are used to convert to/from the on disk
167 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
168 * The conversion here is type only, the value will remain the same since we
169 * are converting to the init_user_ns. The uid is later mapped to a particular
170 * user namespace value when crossing the kernel/user boundary.
171 */
xfs_kuid_to_uid(kuid_t uid)172 static inline uint32_t xfs_kuid_to_uid(kuid_t uid)
173 {
174 return from_kuid(&init_user_ns, uid);
175 }
176
xfs_uid_to_kuid(uint32_t uid)177 static inline kuid_t xfs_uid_to_kuid(uint32_t uid)
178 {
179 return make_kuid(&init_user_ns, uid);
180 }
181
xfs_kgid_to_gid(kgid_t gid)182 static inline uint32_t xfs_kgid_to_gid(kgid_t gid)
183 {
184 return from_kgid(&init_user_ns, gid);
185 }
186
xfs_gid_to_kgid(uint32_t gid)187 static inline kgid_t xfs_gid_to_kgid(uint32_t gid)
188 {
189 return make_kgid(&init_user_ns, gid);
190 }
191
xfs_to_linux_dev_t(xfs_dev_t dev)192 static inline dev_t xfs_to_linux_dev_t(xfs_dev_t dev)
193 {
194 return MKDEV(sysv_major(dev) & 0x1ff, sysv_minor(dev));
195 }
196
linux_to_xfs_dev_t(dev_t dev)197 static inline xfs_dev_t linux_to_xfs_dev_t(dev_t dev)
198 {
199 return sysv_encode_dev(dev);
200 }
201
202 /*
203 * Various platform dependent calls that don't fit anywhere else
204 */
205 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
206 #define xfs_stack_trace() dump_stack()
207
roundup_64(uint64_t x,uint32_t y)208 static inline uint64_t roundup_64(uint64_t x, uint32_t y)
209 {
210 x += y - 1;
211 do_div(x, y);
212 return x * y;
213 }
214
howmany_64(uint64_t x,uint32_t y)215 static inline uint64_t howmany_64(uint64_t x, uint32_t y)
216 {
217 x += y - 1;
218 do_div(x, y);
219 return x;
220 }
221
222 int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
223 char *data, unsigned int op);
224
225 #define ASSERT_ALWAYS(expr) \
226 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
227
228 #ifdef DEBUG
229 #define ASSERT(expr) \
230 (likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
231
232 #else /* !DEBUG */
233
234 #ifdef XFS_WARN
235
236 #define ASSERT(expr) \
237 (likely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
238
239 #else /* !DEBUG && !XFS_WARN */
240
241 #define ASSERT(expr) ((void)0)
242
243 #endif /* XFS_WARN */
244 #endif /* DEBUG */
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_d.di_flags & 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 #endif /* __XFS_LINUX__ */
276