2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #include <linux/types.h>
24 * XFS_BIG_BLKNOS needs block layer disk addresses to be 64 bits.
25 * XFS_BIG_INUMS requires XFS_BIG_BLKNOS to be set.
27 #if defined(CONFIG_LBDAF) || (BITS_PER_LONG == 64)
28 # define XFS_BIG_BLKNOS 1
29 # define XFS_BIG_INUMS 1
31 # define XFS_BIG_BLKNOS 0
32 # define XFS_BIG_INUMS 0
36 * Kernel specific type declarations for XFS
38 typedef signed char __int8_t;
39 typedef unsigned char __uint8_t;
40 typedef signed short int __int16_t;
41 typedef unsigned short int __uint16_t;
42 typedef signed int __int32_t;
43 typedef unsigned int __uint32_t;
44 typedef signed long long int __int64_t;
45 typedef unsigned long long int __uint64_t;
47 typedef __uint32_t inst_t; /* an instruction */
49 typedef __s64 xfs_off_t; /* <file offset> type */
50 typedef unsigned long long xfs_ino_t; /* <inode> type */
51 typedef __s64 xfs_daddr_t; /* <disk address> type */
52 typedef char * xfs_caddr_t; /* <core address> type */
53 typedef __u32 xfs_dev_t;
54 typedef __u32 xfs_nlink_t;
56 /* __psint_t is the same size as a pointer */
57 #if (BITS_PER_LONG == 32)
58 typedef __int32_t __psint_t;
59 typedef __uint32_t __psunsigned_t;
60 #elif (BITS_PER_LONG == 64)
61 typedef __int64_t __psint_t;
62 typedef __uint64_t __psunsigned_t;
64 #error BITS_PER_LONG must be 32 or 64
67 #include "xfs_types.h"
74 #include <linux/semaphore.h>
76 #include <linux/kernel.h>
77 #include <linux/blkdev.h>
78 #include <linux/slab.h>
79 #include <linux/crc32c.h>
80 #include <linux/module.h>
81 #include <linux/mutex.h>
82 #include <linux/file.h>
83 #include <linux/swap.h>
84 #include <linux/errno.h>
85 #include <linux/sched.h>
86 #include <linux/bitops.h>
87 #include <linux/major.h>
88 #include <linux/pagemap.h>
89 #include <linux/vfs.h>
90 #include <linux/seq_file.h>
91 #include <linux/init.h>
92 #include <linux/list.h>
93 #include <linux/proc_fs.h>
94 #include <linux/sort.h>
95 #include <linux/cpu.h>
96 #include <linux/notifier.h>
97 #include <linux/delay.h>
98 #include <linux/log2.h>
99 #include <linux/spinlock.h>
100 #include <linux/random.h>
101 #include <linux/ctype.h>
102 #include <linux/writeback.h>
103 #include <linux/capability.h>
104 #include <linux/kthread.h>
105 #include <linux/freezer.h>
106 #include <linux/list_sort.h>
107 #include <linux/ratelimit.h>
109 #include <asm/page.h>
110 #include <asm/div64.h>
111 #include <asm/param.h>
112 #include <asm/uaccess.h>
113 #include <asm/byteorder.h>
114 #include <asm/unaligned.h>
116 #include "xfs_vnode.h"
117 #include "xfs_stats.h"
118 #include "xfs_sysctl.h"
119 #include "xfs_iops.h"
120 #include "xfs_aops.h"
121 #include "xfs_super.h"
123 #include "xfs_message.h"
126 #define XFS_NATIVE_HOST 1
128 #undef XFS_NATIVE_HOST
132 * Feature macros (disable/enable)
135 #define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
137 #undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */
140 #define irix_sgid_inherit xfs_params.sgid_inherit.val
141 #define irix_symlink_mode xfs_params.symlink_mode.val
142 #define xfs_panic_mask xfs_params.panic_mask.val
143 #define xfs_error_level xfs_params.error_level.val
144 #define xfs_syncd_centisecs xfs_params.syncd_timer.val
145 #define xfs_stats_clear xfs_params.stats_clear.val
146 #define xfs_inherit_sync xfs_params.inherit_sync.val
147 #define xfs_inherit_nodump xfs_params.inherit_nodump.val
148 #define xfs_inherit_noatime xfs_params.inherit_noatim.val
149 #define xfs_buf_timer_centisecs xfs_params.xfs_buf_timer.val
150 #define xfs_buf_age_centisecs xfs_params.xfs_buf_age.val
151 #define xfs_inherit_nosymlinks xfs_params.inherit_nosym.val
152 #define xfs_rotorstep xfs_params.rotorstep.val
153 #define xfs_inherit_nodefrag xfs_params.inherit_nodfrg.val
154 #define xfs_fstrm_centisecs xfs_params.fstrm_timer.val
155 #define xfs_eofb_secs xfs_params.eofb_timer.val
157 #define current_cpu() (raw_smp_processor_id())
158 #define current_pid() (current->pid)
159 #define current_test_flags(f) (current->flags & (f))
160 #define current_set_flags_nested(sp, f) \
161 (*(sp) = current->flags, current->flags |= (f))
162 #define current_clear_flags_nested(sp, f) \
163 (*(sp) = current->flags, current->flags &= ~(f))
164 #define current_restore_flags_nested(sp, f) \
165 (current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
167 #define spinlock_destroy(lock)
169 #define NBBY 8 /* number of bits per byte */
172 * Size of block device i/o is parameterized here.
173 * Currently the system supports page-sized i/o.
175 #define BLKDEV_IOSHIFT PAGE_CACHE_SHIFT
176 #define BLKDEV_IOSIZE (1<<BLKDEV_IOSHIFT)
177 /* number of BB's per block device block */
178 #define BLKDEV_BB BTOBB(BLKDEV_IOSIZE)
180 #define ENOATTR ENODATA /* Attribute not found */
181 #define EWRONGFS EINVAL /* Mount with wrong filesystem type */
182 #define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
184 #define SYNCHRONIZE() barrier()
185 #define __return_address __builtin_return_address(0)
187 #define XFS_PROJID_DEFAULT 0
188 #define MAXPATHLEN 1024
190 #define MIN(a,b) (min(a,b))
191 #define MAX(a,b) (max(a,b))
192 #define howmany(x, y) (((x)+((y)-1))/(y))
194 /* Kernel uid/gid conversion. These are used to convert to/from the on disk
195 * uid_t/gid_t types to the kuid_t/kgid_t types that the kernel uses internally.
196 * The conversion here is type only, the value will remain the same since we
197 * are converting to the init_user_ns. The uid is later mapped to a particular
198 * user namespace value when crossing the kernel/user boundary.
200 static inline __uint32_t xfs_kuid_to_uid(kuid_t uid)
202 return from_kuid(&init_user_ns, uid);
205 static inline kuid_t xfs_uid_to_kuid(__uint32_t uid)
207 return make_kuid(&init_user_ns, uid);
210 static inline __uint32_t xfs_kgid_to_gid(kgid_t gid)
212 return from_kgid(&init_user_ns, gid);
215 static inline kgid_t xfs_gid_to_kgid(__uint32_t gid)
217 return make_kgid(&init_user_ns, gid);
221 * Various platform dependent calls that don't fit anywhere else
223 #define xfs_sort(a,n,s,fn) sort(a,n,s,fn,NULL)
224 #define xfs_stack_trace() dump_stack()
227 /* Move the kernel do_div definition off to one side */
230 /* For ia32 we need to pull some tricks to get past various versions
231 * of the compiler which do not like us using do_div in the middle
232 * of large functions.
234 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
240 mod = *(__u32 *)a % b;
241 *(__u32 *)a = *(__u32 *)a / b;
245 unsigned long __upper, __low, __high, __mod;
246 __u64 c = *(__u64 *)a;
247 __upper = __high = c >> 32;
250 __upper = __high % (b);
251 __high = __high / (b);
253 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
254 asm("":"=A" (c):"a" (__low),"d" (__high));
264 /* Side effect free 64 bit mod operation */
265 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
269 return *(__u32 *)a % b;
272 unsigned long __upper, __low, __high, __mod;
273 __u64 c = *(__u64 *)a;
274 __upper = __high = c >> 32;
277 __upper = __high % (b);
278 __high = __high / (b);
280 asm("divl %2":"=a" (__low), "=d" (__mod):"rm" (b), "0" (__low), "1" (__upper));
281 asm("":"=A" (c):"a" (__low),"d" (__high));
290 static inline __u32 xfs_do_div(void *a, __u32 b, int n)
296 mod = *(__u32 *)a % b;
297 *(__u32 *)a = *(__u32 *)a / b;
300 mod = do_div(*(__u64 *)a, b);
308 /* Side effect free 64 bit mod operation */
309 static inline __u32 xfs_do_mod(void *a, __u32 b, int n)
313 return *(__u32 *)a % b;
316 __u64 c = *(__u64 *)a;
327 #define do_div(a, b) xfs_do_div(&(a), (b), sizeof(a))
328 #define do_mod(a, b) xfs_do_mod(&(a), (b), sizeof(a))
330 static inline __uint64_t roundup_64(__uint64_t x, __uint32_t y)
337 static inline __uint64_t howmany_64(__uint64_t x, __uint32_t y)
344 /* ARM old ABI has some weird alignment/padding */
345 #if defined(__arm__) && !defined(__ARM_EABI__)
346 #define __arch_pack __attribute__((packed))
351 #define ASSERT_ALWAYS(expr) \
352 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
355 #define ASSERT(expr) \
356 (unlikely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
359 # define STATIC noinline
366 #define ASSERT(expr) \
367 (unlikely(expr) ? (void)0 : asswarn(#expr, __FILE__, __LINE__))
370 # define STATIC static noinline
373 #else /* !DEBUG && !XFS_WARN */
375 #define ASSERT(expr) ((void)0)
378 # define STATIC static noinline
381 #endif /* XFS_WARN */
384 #endif /* __XFS_LINUX__ */