1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010 Marc Alexander Lehmann <libeio@schmorp.de> |
5 | * All rights reserved. |
5 | * All rights reserved. |
6 | * |
6 | * |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
7 | * Redistribution and use in source and binary forms, with or without modifica- |
8 | * tion, are permitted provided that the following conditions are met: |
8 | * tion, are permitted provided that the following conditions are met: |
9 | * |
9 | * |
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58 | |
58 | |
59 | #ifndef EIO_STRUCT_STAT |
59 | #ifndef EIO_STRUCT_STAT |
60 | # define EIO_STRUCT_STAT struct stat |
60 | # define EIO_STRUCT_STAT struct stat |
61 | #endif |
61 | #endif |
62 | |
62 | |
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63 | #ifndef EIO_STRUCT_STATVFS |
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64 | # define EIO_STRUCT_STATVFS struct statvfs |
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65 | #endif |
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66 | |
63 | /* for readdir */ |
67 | /* for readdir */ |
64 | |
68 | |
65 | /* eio_readdir flags */ |
69 | /* eio_readdir flags */ |
66 | enum { |
70 | enum { |
67 | EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ |
71 | EIO_READDIR_DENTS = 0x01, /* ptr2 contains eio_dirents, not just the (unsorted) names */ |
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93 | EIO_DT_WHT = 14, |
97 | EIO_DT_WHT = 14, |
94 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
98 | EIO_DT_MAX = 15 /* highest DT_VALUE ever, hopefully */ |
95 | }; |
99 | }; |
96 | |
100 | |
97 | struct eio_dirent { |
101 | struct eio_dirent { |
98 | char *name; |
102 | int nameofs; /* offset of null-terminated name string in (char *)req->ptr2 */ |
99 | ino_t inode; |
103 | unsigned short namelen; /* size of filename without trailing 0 */ |
100 | unsigned short namelen; |
104 | unsigned char type; /* one of EIO_DT_* */ |
101 | unsigned char type; |
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102 | unsigned char score; /* internal use */ |
105 | signed char score; /* internal use */ |
103 | /* 0-4 bytes padding */ |
106 | ino_t inode; /* the inode number, if available, otherwise unspecified */ |
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107 | }; |
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108 | |
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109 | /* eio_msync flags */ |
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110 | enum { |
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111 | EIO_MS_ASYNC = 1, |
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112 | EIO_MS_INVALIDATE = 2, |
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113 | EIO_MS_SYNC = 4 |
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114 | }; |
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115 | |
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116 | /* eio_mtouch flags */ |
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117 | |
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118 | enum { |
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119 | EIO_MT_MODIFY = 1 |
104 | }; |
120 | }; |
105 | |
121 | |
106 | /* eio_sync_file_range flags */ |
122 | /* eio_sync_file_range flags */ |
107 | |
123 | |
108 | enum { |
124 | enum { |
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119 | EIO_CUSTOM, |
135 | EIO_CUSTOM, |
120 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
136 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
121 | EIO_READ, EIO_WRITE, |
137 | EIO_READ, EIO_WRITE, |
122 | EIO_READAHEAD, EIO_SENDFILE, |
138 | EIO_READAHEAD, EIO_SENDFILE, |
123 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
139 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
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140 | EIO_STATVFS, EIO_FSTATVFS, |
124 | EIO_TRUNCATE, EIO_FTRUNCATE, |
141 | EIO_TRUNCATE, EIO_FTRUNCATE, |
125 | EIO_UTIME, EIO_FUTIME, |
142 | EIO_UTIME, EIO_FUTIME, |
126 | EIO_CHMOD, EIO_FCHMOD, |
143 | EIO_CHMOD, EIO_FCHMOD, |
127 | EIO_CHOWN, EIO_FCHOWN, |
144 | EIO_CHOWN, EIO_FCHOWN, |
128 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
145 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
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142 | eio_req volatile *next; /* private ETP */ |
159 | eio_req volatile *next; /* private ETP */ |
143 | |
160 | |
144 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
161 | ssize_t result; /* result of syscall, e.g. result = read (... */ |
145 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ |
162 | off_t offs; /* read, write, truncate, readahead, sync_file_range: file offset */ |
146 | size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ |
163 | size_t size; /* read, write, readahead, sendfile, msync, sync_file_range: length */ |
147 | void *ptr1; /* all applicable requests: pathname, old name; readdir: possible output memory buffer */ |
164 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
148 | void *ptr2; /* all applicable requests: new name or memory buffer */ |
165 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
149 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
166 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
150 | eio_tstamp nv2; /* utime, futime: mtime */ |
167 | eio_tstamp nv2; /* utime, futime: mtime */ |
151 | |
168 | |
152 | int type; /* EIO_xxx constant ETP */ |
169 | int type; /* EIO_xxx constant ETP */ |
153 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ |
170 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, readdir: flags */ |
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225 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
242 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
226 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
243 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
227 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
244 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
228 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
245 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
229 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
246 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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247 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
230 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
248 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
231 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
249 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
232 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
250 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
233 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
251 | eio_req *eio_fchown (int fd, uid_t uid, gid_t gid, int pri, eio_cb cb, void *data); |
234 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
252 | eio_req *eio_dup2 (int fd, int fd2, int pri, eio_cb cb, void *data); |
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243 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
261 | eio_req *eio_rmdir (const char *path, int pri, eio_cb cb, void *data); |
244 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
262 | eio_req *eio_unlink (const char *path, int pri, eio_cb cb, void *data); |
245 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
263 | eio_req *eio_readlink (const char *path, int pri, eio_cb cb, void *data); /* result=ptr2 allocated dynamically */ |
246 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
264 | eio_req *eio_stat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
247 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
265 | eio_req *eio_lstat (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
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266 | eio_req *eio_statvfs (const char *path, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
248 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
267 | eio_req *eio_mknod (const char *path, mode_t mode, dev_t dev, int pri, eio_cb cb, void *data); |
249 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
268 | eio_req *eio_link (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
250 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
269 | eio_req *eio_symlink (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
251 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
270 | eio_req *eio_rename (const char *path, const char *new_path, int pri, eio_cb cb, void *data); |
252 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
271 | eio_req *eio_custom (eio_cb execute, int pri, eio_cb cb, void *data); |
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263 | |
282 | |
264 | /*****************************************************************************/ |
283 | /*****************************************************************************/ |
265 | /* request api */ |
284 | /* request api */ |
266 | |
285 | |
267 | /* true if the request was cancelled, useful in the invoke callback */ |
286 | /* true if the request was cancelled, useful in the invoke callback */ |
268 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
287 | #define EIO_CANCELLED(req) ((req)->flags & EIO_FLAG_CANCELLED) |
269 | |
288 | |
270 | #define EIO_RESULT(req) ((req)->result) |
289 | #define EIO_RESULT(req) ((req)->result) |
271 | /* returns a pointer to the result buffer allocated by eio */ |
290 | /* returns a pointer to the result buffer allocated by eio */ |
272 | #define EIO_BUF(req) ((req)->ptr2) |
291 | #define EIO_BUF(req) ((req)->ptr2) |
273 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
292 | #define EIO_STAT_BUF(req) ((EIO_STRUCT_STAT *)EIO_BUF(req)) |
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293 | #define EIO_STATVFS_BUF(req) ((EIO_STRUCT_STATVFS *)EIO_BUF(req)) |
274 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
294 | #define EIO_PATH(req) ((char *)(req)->ptr1) |
275 | |
295 | |
276 | /* submit a request for execution */ |
296 | /* submit a request for execution */ |
277 | void eio_submit (eio_req *req); |
297 | void eio_submit (eio_req *req); |
278 | /* cancel a request as soon fast as possible, if possible */ |
298 | /* cancel a request as soon fast as possible, if possible */ |
279 | void eio_cancel (eio_req *req); |
299 | void eio_cancel (eio_req *req); |