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/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 | |
142 | static 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 | */ |
153 | struct xfs_kobj { |
154 | struct kobject kobject; |
155 | struct completion complete; |
156 | }; |
157 | |
158 | struct xstats { |
159 | struct xfsstats __percpu *xs_stats; |
160 | struct xfs_kobj xs_kobj; |
161 | }; |
162 | |
163 | extern struct xstats xfsstats; |
164 | |
165 | static 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 | |
170 | static 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 | |
181 | static inline uint64_t rounddown_64(uint64_t x, uint32_t y) |
182 | { |
183 | do_div(x, y); |
184 | return x * y; |
185 | } |
186 | |
187 | static 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 | |
194 | static 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. */ |
202 | static 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. */ |
208 | static inline unsigned long long mask64_if_power2(unsigned long b) |
209 | { |
210 | return is_power_of_2(n: b) ? b - 1 : 0; |
211 | } |
212 | |
213 | int 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 | |