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1 | /* |
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2 | * libeio API header |
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3 | * |
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4 | * Copyright (c) 2007,2008 Marc Alexander Lehmann <libeio@schmorp.de> |
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5 | * All rights reserved. |
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6 | * |
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7 | * Redistribution and use in source and binary forms, with or without modifica- |
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8 | * tion, are permitted provided that the following conditions are met: |
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9 | * |
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10 | * 1. Redistributions of source code must retain the above copyright notice, |
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11 | * this list of conditions and the following disclaimer. |
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12 | * |
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13 | * 2. Redistributions in binary form must reproduce the above copyright |
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14 | * notice, this list of conditions and the following disclaimer in the |
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15 | * documentation and/or other materials provided with the distribution. |
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16 | * |
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17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
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18 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- |
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19 | * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
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20 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- |
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21 | * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
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22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
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23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
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24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTH- |
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25 | * ERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED |
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26 | * OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 | * |
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28 | * Alternatively, the contents of this file may be used under the terms of |
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29 | * the GNU General Public License ("GPL") version 2 or any later version, |
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30 | * in which case the provisions of the GPL are applicable instead of |
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31 | * the above. If you wish to allow the use of your version of this file |
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32 | * only under the terms of the GPL and not to allow others to use your |
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33 | * version of this file under the BSD license, indicate your decision |
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34 | * by deleting the provisions above and replace them with the notice |
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35 | * and other provisions required by the GPL. If you do not delete the |
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36 | * provisions above, a recipient may use your version of this file under |
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37 | * either the BSD or the GPL. |
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38 | */ |
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39 | |
1 | #ifndef EIO_H_ |
40 | #ifndef EIO_H_ |
2 | #define EIO_H_ |
41 | #define EIO_H_ |
3 | |
42 | |
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43 | #ifdef __cplusplus |
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44 | extern "C" { |
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45 | #endif |
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46 | |
4 | #include <stddef.h> |
47 | #include <stddef.h> |
5 | #include <sys/types.h> |
48 | #include <sys/types.h> |
6 | |
49 | |
7 | typedef struct eio_req eio_req; |
50 | typedef struct eio_req eio_req; |
8 | |
51 | |
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15 | #ifndef EIO_STRUCT_STAT |
58 | #ifndef EIO_STRUCT_STAT |
16 | # define EIO_STRUCT_STAT struct stat |
59 | # define EIO_STRUCT_STAT struct stat |
17 | #endif |
60 | #endif |
18 | |
61 | |
19 | enum { |
62 | enum { |
20 | EIO_QUIT, |
63 | EIO_CUSTOM, |
21 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
64 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
22 | EIO_READ, EIO_WRITE, |
65 | EIO_READ, EIO_WRITE, |
23 | EIO_READAHEAD, EIO_SENDFILE, |
66 | EIO_READAHEAD, EIO_SENDFILE, |
24 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
67 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
25 | EIO_TRUNCATE, EIO_FTRUNCATE, |
68 | EIO_TRUNCATE, EIO_FTRUNCATE, |
26 | EIO_UTIME, EIO_FUTIME, |
69 | EIO_UTIME, EIO_FUTIME, |
27 | EIO_CHMOD, EIO_FCHMOD, |
70 | EIO_CHMOD, EIO_FCHMOD, |
28 | EIO_CHOWN, EIO_FCHOWN, |
71 | EIO_CHOWN, EIO_FCHOWN, |
29 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
72 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_MSYNC, EIO_MTOUCH, |
30 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
73 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
31 | EIO_MKNOD, EIO_READDIR, |
74 | EIO_MKNOD, EIO_READDIR, |
32 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
75 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
33 | EIO_GROUP, EIO_NOP, |
76 | EIO_GROUP, EIO_NOP, |
34 | EIO_BUSY, |
77 | EIO_BUSY, |
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38 | |
81 | |
39 | /* eio request structure */ |
82 | /* eio request structure */ |
40 | /* this structure is mostly read-only */ |
83 | /* this structure is mostly read-only */ |
41 | struct eio_req |
84 | struct eio_req |
42 | { |
85 | { |
43 | eio_req volatile *next; /* private */ |
86 | eio_req volatile *next; /* private ETP */ |
44 | |
87 | |
45 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
88 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
46 | off_t offs; /* read, write, truncate, readahead: file offset; mknod: dev_t */ |
89 | off_t offs; /* read, write, truncate, readahead: file offset */ |
47 | size_t size; /* read, write, readahead, sendfile: length */ |
90 | size_t size; /* read, write, readahead, sendfile, msync: length */ |
48 | void *ptr1; /* all applicable requests: pathname, old name */ |
91 | void *ptr1; /* all applicable requests: pathname, old name */ |
49 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
92 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
50 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
93 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
51 | eio_tstamp nv2; /* utime, futime: mtime */ |
94 | eio_tstamp nv2; /* utime, futime: mtime */ |
52 | |
95 | |
53 | int type; /* EIO_xxx constant */ |
96 | int type; /* EIO_xxx constant ETP */ |
54 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open: flags */ |
97 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync: flags */ |
55 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
98 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode */ |
56 | long int3; /* chown, fchown: gid */ |
99 | long int3; /* chown, fchown: gid; mknod: dev_t */ |
57 | int errorno; /* errno value on syscall return */ |
100 | int errorno; /* errno value on syscall return */ |
58 | |
101 | |
59 | unsigned char flags; /* private */ |
102 | unsigned char flags; /* private */ |
60 | signed char pri; /* the priority */ |
103 | signed char pri; /* the priority */ |
61 | |
104 | |
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67 | EIO_REQ_MEMBERS |
110 | EIO_REQ_MEMBERS |
68 | |
111 | |
69 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
112 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
70 | }; |
113 | }; |
71 | |
114 | |
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115 | /* _private_ flags */ |
72 | enum { |
116 | enum { |
73 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
117 | EIO_FLAG_CANCELLED = 0x01, /* request was cancelled */ |
74 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
118 | EIO_FLAG_PTR1_FREE = 0x02, /* need to free(ptr1) */ |
75 | EIO_FLAG_PTR2_FREE = 0x04 /* need to free(ptr2) */ |
119 | EIO_FLAG_PTR2_FREE = 0x04, /* need to free(ptr2) */ |
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120 | EIO_FLAG_GROUPADD = 0x08 /* some request was added to the group */ |
76 | }; |
121 | }; |
77 | |
122 | |
78 | enum { |
123 | enum { |
79 | EIO_PRI_MIN = -4, |
124 | EIO_PRI_MIN = -4, |
80 | EIO_PRI_MAX = 4, |
125 | EIO_PRI_MAX = 4, |
81 | |
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82 | EIO_PRI_DEFAULT = 0, |
126 | EIO_PRI_DEFAULT = 0, |
83 | EIO_PRI_BIAS = -EIO_PRI_MIN, |
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84 | EIO_NUM_PRI = EIO_PRI_MAX + EIO_PRI_BIAS + 1 |
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85 | }; |
127 | }; |
86 | |
128 | |
87 | /* returns < 0 on error, errno set |
129 | /* returns < 0 on error, errno set |
88 | * need_poll, if non-zero, will be called when results are available |
130 | * need_poll, if non-zero, will be called when results are available |
89 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
131 | * and eio_poll_cb needs to be invoked (it MUST NOT call eio_poll_cb itself). |
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119 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
161 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
120 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
162 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
121 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
163 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
122 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
164 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
123 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
165 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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166 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
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167 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
124 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
168 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
125 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
169 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
126 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
170 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
127 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
171 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
128 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
172 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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146 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
190 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
147 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
191 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
148 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
192 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
149 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
193 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
150 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
194 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
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195 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
151 | #endif |
196 | #endif |
152 | |
197 | |
153 | /*****************************************************************************/ |
198 | /*****************************************************************************/ |
154 | /* groups */ |
199 | /* groups */ |
155 | |
200 | |
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181 | /*****************************************************************************/ |
226 | /*****************************************************************************/ |
182 | /* convinience functions */ |
227 | /* convinience functions */ |
183 | |
228 | |
184 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
229 | ssize_t eio_sendfile_sync (int ofd, int ifd, off_t offset, size_t count); |
185 | |
230 | |
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231 | #ifdef __cplusplus |
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232 | } |
186 | #endif |
233 | #endif |
187 | |
234 | |
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235 | #endif |
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236 | |