Commit | Line | Data |
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d8525fbd JA |
1 | #ifndef SPLICE_H |
2 | #define SPLICE_H | |
3 | ||
a05d2973 | 4 | #include <errno.h> |
001a41ec | 5 | #include <sys/uio.h> |
76797253 | 6 | #include <sys/stat.h> |
a05d2973 | 7 | #include <asm/unistd.h> |
001a41ec | 8 | |
d8525fbd | 9 | #if defined(__i386__) |
a05d2973 JA |
10 | #define __NR_sys_splice 313 |
11 | #define __NR_sys_tee 315 | |
12 | #define __NR_sys_vmsplice 316 | |
d8525fbd | 13 | #elif defined(__x86_64__) |
a05d2973 JA |
14 | #define __NR_sys_splice 275 |
15 | #define __NR_sys_tee 276 | |
16 | #define __NR_sys_vmsplice 278 | |
d8525fbd | 17 | #elif defined(__powerpc__) || defined(__powerpc64__) |
a05d2973 JA |
18 | #define __NR_sys_splice 283 |
19 | #define __NR_sys_tee 284 | |
20 | #define __NR_sys_vmsplice 285 | |
d8525fbd | 21 | #elif defined(__ia64__) |
a05d2973 JA |
22 | #define __NR_sys_splice 1297 |
23 | #define __NR_sys_tee 1301 | |
24 | #define __NR_sys_vmsplice 1302 | |
d8525fbd JA |
25 | #else |
26 | #error unsupported arch | |
27 | #endif | |
28 | ||
29 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ | |
30 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ | |
31 | /* we may still block on the fd we splice */ | |
32 | /* from/to, of course */ | |
33 | #define SPLICE_F_MORE (0x04) /* expect more data */ | |
96897528 | 34 | #define SPLICE_F_GIFT (0x08) /* pages passed in are a gift */ |
d8525fbd | 35 | |
a05d2973 JA |
36 | _syscall6(int, sys_splice, int, fdin, loff_t *, off_in, int, fdout, loff_t *, off_out, size_t, len, unsigned int, flags); |
37 | _syscall4(int, sys_vmsplice, int, fd, const struct iovec *, iov, unsigned long, nr_segs, unsigned int, flags); | |
38 | _syscall4(int, sys_tee, int, fdin, int, fdout, size_t, len, unsigned int, flags); | |
39 | ||
d8525fbd JA |
40 | static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out, |
41 | size_t len, unsigned long flags) | |
42 | { | |
a05d2973 | 43 | return sys_splice(fdin, off_in, fdout, off_out, len, flags); |
d8525fbd JA |
44 | } |
45 | ||
46 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) | |
47 | { | |
a05d2973 | 48 | return sys_tee(fdin, fdout, len, flags); |
d8525fbd JA |
49 | } |
50 | ||
001a41ec JA |
51 | static inline int vmsplice(int fd, const struct iovec *iov, |
52 | unsigned long nr_segs, unsigned int flags) | |
7ee0f27f | 53 | { |
a05d2973 | 54 | return sys_vmsplice(fd, iov, nr_segs, flags); |
7ee0f27f JA |
55 | } |
56 | ||
d8525fbd JA |
57 | #define SPLICE_SIZE (64*1024) |
58 | ||
59 | #define BUG_ON(c) assert(!(c)) | |
60 | ||
61 | #define min(x,y) ({ \ | |
62 | typeof(x) _x = (x); \ | |
63 | typeof(y) _y = (y); \ | |
64 | (void) (&_x == &_y); \ | |
65 | _x < _y ? _x : _y; }) | |
66 | ||
67 | #define max(x,y) ({ \ | |
68 | typeof(x) _x = (x); \ | |
69 | typeof(y) _y = (y); \ | |
70 | (void) (&_x == &_y); \ | |
71 | _x > _y ? _x : _y; }) | |
72 | ||
73 | static inline int error(const char *n) | |
74 | { | |
75 | perror(n); | |
76 | return -1; | |
77 | } | |
78 | ||
76797253 JA |
79 | static int __check_pipe(int pfd) |
80 | { | |
81 | struct stat sb; | |
82 | ||
83 | if (fstat(pfd, &sb) < 0) | |
84 | return error("stat"); | |
85 | if (!S_ISFIFO(sb.st_mode)) | |
86 | return 1; | |
87 | ||
88 | return 0; | |
89 | } | |
90 | ||
91 | static inline int check_input_pipe(void) | |
92 | { | |
93 | if (!__check_pipe(STDIN_FILENO)) | |
94 | return 0; | |
95 | ||
96 | fprintf(stderr, "stdin must be a pipe\n"); | |
97 | return 1; | |
98 | } | |
99 | ||
100 | static inline int check_output_pipe(void) | |
101 | { | |
102 | if (!__check_pipe(STDOUT_FILENO)) | |
103 | return 0; | |
104 | ||
105 | fprintf(stderr, "stdout must be a pipe\n"); | |
106 | return 1; | |
107 | } | |
108 | ||
d8525fbd | 109 | #endif |