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1 #ifndef FIO_OS_ANDROID_H
2 #define FIO_OS_ANDROID_H
3 
4 #define	FIO_OS	os_android
5 
6 #include <sys/ioctl.h>
7 #include <sys/mman.h>
8 #include <sys/uio.h>
9 #include <sys/syscall.h>
10 #include <sys/vfs.h>
11 #include <unistd.h>
12 #include <fcntl.h>
13 #include <errno.h>
14 #include <sched.h>
15 #include <linux/major.h>
16 #include <asm/byteorder.h>
17 #include <byteswap.h>
18 
19 #include "binject.h"
20 #include "../file.h"
21 
22 #define FIO_HAVE_DISK_UTIL
23 #define FIO_HAVE_IOSCHED_SWITCH
24 #define FIO_HAVE_IOPRIO
25 #define FIO_HAVE_ODIRECT
26 #define FIO_HAVE_HUGETLB
27 #define FIO_HAVE_BLKTRACE
28 #define FIO_HAVE_PSHARED_MUTEX
29 #define FIO_HAVE_CL_SIZE
30 #define FIO_HAVE_FS_STAT
31 #define FIO_HAVE_TRIM
32 #define FIO_HAVE_GETTID
33 #define FIO_USE_GENERIC_INIT_RANDOM_STATE
34 #define FIO_HAVE_E4_ENG
35 #define FIO_HAVE_BYTEORDER_FUNCS
36 #define FIO_HAVE_MMAP_HUGE
37 #define FIO_NO_HAVE_SHM_H
38 
39 #define OS_MAP_ANON		MAP_ANONYMOUS
40 
41 #ifndef POSIX_MADV_DONTNEED
42 #define posix_madvise   madvise
43 #define POSIX_MADV_DONTNEED MADV_DONTNEED
44 #define POSIX_MADV_SEQUENTIAL	MADV_SEQUENTIAL
45 #define POSIX_MADV_RANDOM	MADV_RANDOM
46 #endif
47 
48 #ifdef MADV_REMOVE
49 #define FIO_MADV_FREE	MADV_REMOVE
50 #endif
51 #ifndef MAP_HUGETLB
52 #define MAP_HUGETLB 0x40000 /* arch specific */
53 #endif
54 
55 
56 /*
57  * The Android NDK doesn't currently export <sys/shm.h>, so define the
58  * necessary stuff here.
59  */
60 
61 #include <linux/shm.h>
62 #define SHM_HUGETLB    04000
63 
64 #include <stdio.h>
65 #include <linux/ashmem.h>
66 #include <sys/mman.h>
67 
68 #define ASHMEM_DEVICE	"/dev/ashmem"
69 
shmctl(int __shmid,int __cmd,struct shmid_ds * __buf)70 static inline int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf)
71 {
72 	int ret=0;
73 	if (__cmd == IPC_RMID)
74 	{
75 		int length = ioctl(__shmid, ASHMEM_GET_SIZE, NULL);
76 		struct ashmem_pin pin = {0 , length};
77 		ret = ioctl(__shmid, ASHMEM_UNPIN, &pin);
78 		close(__shmid);
79 	}
80 	return ret;
81 }
82 
shmget(key_t __key,size_t __size,int __shmflg)83 static inline int shmget (key_t __key, size_t __size, int __shmflg)
84 {
85 	int fd,ret;
86 	char key[11];
87 
88 	fd = open(ASHMEM_DEVICE, O_RDWR);
89 	if (fd < 0)
90 		return fd;
91 
92 	sprintf(key,"%d",__key);
93 	ret = ioctl(fd, ASHMEM_SET_NAME, key);
94 	if (ret < 0)
95 		goto error;
96 
97 	ret = ioctl(fd, ASHMEM_SET_SIZE, __size);
98 	if (ret < 0)
99 		goto error;
100 
101 	return fd;
102 
103 error:
104 	close(fd);
105 	return ret;
106 }
107 
shmat(int __shmid,const void * __shmaddr,int __shmflg)108 static inline void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
109 {
110 	size_t *ptr, size = ioctl(__shmid, ASHMEM_GET_SIZE, NULL);
111 	ptr = mmap(NULL, size + sizeof(size_t), PROT_READ | PROT_WRITE, MAP_SHARED, __shmid, 0);
112 	*ptr = size;    //save size at beginning of buffer, for use with munmap
113 	return &ptr[1];
114 }
115 
shmdt(const void * __shmaddr)116 static inline int shmdt (const void *__shmaddr)
117 {
118 	size_t *ptr, size;
119 	ptr = (size_t *)__shmaddr;
120 	ptr--;
121 	size = *ptr;    //find mmap size which we stored at the beginning of the buffer
122 	return munmap((void *)ptr, size + sizeof(size_t));
123 }
124 
125 #define SPLICE_DEF_SIZE	(64*1024)
126 
127 enum {
128 	IOPRIO_CLASS_NONE,
129 	IOPRIO_CLASS_RT,
130 	IOPRIO_CLASS_BE,
131 	IOPRIO_CLASS_IDLE,
132 };
133 
134 enum {
135 	IOPRIO_WHO_PROCESS = 1,
136 	IOPRIO_WHO_PGRP,
137 	IOPRIO_WHO_USER,
138 };
139 
140 #define IOPRIO_BITS		16
141 #define IOPRIO_CLASS_SHIFT	13
142 
ioprio_set(int which,int who,int ioprio_class,int ioprio)143 static inline int ioprio_set(int which, int who, int ioprio_class, int ioprio)
144 {
145 	/*
146 	 * If no class is set, assume BE
147 	 */
148 	if (!ioprio_class)
149 		ioprio_class = IOPRIO_CLASS_BE;
150 
151 	ioprio |= ioprio_class << IOPRIO_CLASS_SHIFT;
152 	return syscall(__NR_ioprio_set, which, who, ioprio);
153 }
154 
155 #ifndef BLKGETSIZE64
156 #define BLKGETSIZE64	_IOR(0x12,114,size_t)
157 #endif
158 
159 #ifndef BLKFLSBUF
160 #define BLKFLSBUF	_IO(0x12,97)
161 #endif
162 
163 #ifndef BLKDISCARD
164 #define BLKDISCARD	_IO(0x12,119)
165 #endif
166 
blockdev_invalidate_cache(struct fio_file * f)167 static inline int blockdev_invalidate_cache(struct fio_file *f)
168 {
169 	return ioctl(f->fd, BLKFLSBUF);
170 }
171 
blockdev_size(struct fio_file * f,unsigned long long * bytes)172 static inline int blockdev_size(struct fio_file *f, unsigned long long *bytes)
173 {
174 	if (!ioctl(f->fd, BLKGETSIZE64, bytes))
175 		return 0;
176 
177 	return errno;
178 }
179 
os_phys_mem(void)180 static inline unsigned long long os_phys_mem(void)
181 {
182 	long pagesize, pages;
183 
184 	pagesize = sysconf(_SC_PAGESIZE);
185 	pages = sysconf(_SC_PHYS_PAGES);
186 	if (pages == -1 || pagesize == -1)
187 		return 0;
188 
189 	return (unsigned long long) pages * (unsigned long long) pagesize;
190 }
191 
192 typedef struct { unsigned short r[3]; } os_random_state_t;
193 
os_random_seed(unsigned long seed,os_random_state_t * rs)194 static inline void os_random_seed(unsigned long seed, os_random_state_t *rs)
195 {
196 	rs->r[0] = seed & 0xffff;
197 	seed >>= 16;
198 	rs->r[1] = seed & 0xffff;
199 	seed >>= 16;
200 	rs->r[2] = seed & 0xffff;
201 	seed48(rs->r);
202 }
203 
os_random_long(os_random_state_t * rs)204 static inline long os_random_long(os_random_state_t *rs)
205 {
206 	return nrand48(rs->r);
207 }
208 
209 #ifdef O_NOATIME
210 #define FIO_O_NOATIME	O_NOATIME
211 #else
212 #define FIO_O_NOATIME	0
213 #endif
214 
215 #define fio_swap16(x)	bswap_16(x)
216 #define fio_swap32(x)	bswap_32(x)
217 #define fio_swap64(x)	bswap_64(x)
218 
219 #define CACHE_LINE_FILE	\
220 	"/sys/devices/system/cpu/cpu0/cache/index0/coherency_line_size"
221 
arch_cache_line_size(void)222 static inline int arch_cache_line_size(void)
223 {
224 	char size[32];
225 	int fd, ret;
226 
227 	fd = open(CACHE_LINE_FILE, O_RDONLY);
228 	if (fd < 0)
229 		return -1;
230 
231 	ret = read(fd, size, sizeof(size));
232 
233 	close(fd);
234 
235 	if (ret <= 0)
236 		return -1;
237 	else
238 		return atoi(size);
239 }
240 
get_fs_size(const char * path)241 static inline unsigned long long get_fs_size(const char *path)
242 {
243 	unsigned long long ret;
244 	struct statfs s;
245 
246 	if (statfs(path, &s) < 0)
247 		return -1ULL;
248 
249 	ret = s.f_bsize;
250 	ret *= (unsigned long long) s.f_bfree;
251 	return ret;
252 }
253 
os_trim(int fd,unsigned long long start,unsigned long long len)254 static inline int os_trim(int fd, unsigned long long start,
255 			  unsigned long long len)
256 {
257 	uint64_t range[2];
258 
259 	range[0] = start;
260 	range[1] = len;
261 
262 	if (!ioctl(fd, BLKDISCARD, range))
263 		return 0;
264 
265 	return errno;
266 }
267 
268 #ifdef CONFIG_SCHED_IDLE
fio_set_sched_idle(void)269 static inline int fio_set_sched_idle(void)
270 {
271         struct sched_param p = { .sched_priority = 0, };
272         return sched_setscheduler(gettid(), SCHED_IDLE, &p);
273 }
274 #endif
275 
276 #endif
277