1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010,2011 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012 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 | * |
… | |
… | |
67 | #endif |
67 | #endif |
68 | |
68 | |
69 | #ifdef _WIN32 |
69 | #ifdef _WIN32 |
70 | typedef int eio_uid_t; |
70 | typedef int eio_uid_t; |
71 | typedef int eio_gid_t; |
71 | typedef int eio_gid_t; |
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72 | #ifdef __MINGW32__ /* no intptr_t */ |
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73 | typedef ssize_t eio_ssize_t; |
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74 | #else |
72 | typedef intptr_t eio_ssize_t; /* or SSIZE_T */ |
75 | typedef intptr_t eio_ssize_t; /* or SSIZE_T */ |
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76 | #endif |
73 | #if __GNUC__ |
77 | #if __GNUC__ |
74 | typedef long long eio_ino_t; |
78 | typedef long long eio_ino_t; /* signed for compatibility to msvc */ |
75 | #else |
79 | #else |
76 | typedef __int64 eio_ino_t; /* unsigned not supported by msvc */ |
80 | typedef __int64 eio_ino_t; /* unsigned not supported by msvc */ |
77 | #endif |
81 | #endif |
78 | #else |
82 | #else |
79 | typedef uid_t eio_uid_t; |
83 | typedef uid_t eio_uid_t; |
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83 | #endif |
87 | #endif |
84 | |
88 | |
85 | #ifndef EIO_STRUCT_STATVFS |
89 | #ifndef EIO_STRUCT_STATVFS |
86 | # define EIO_STRUCT_STATVFS struct statvfs |
90 | # define EIO_STRUCT_STATVFS struct statvfs |
87 | #endif |
91 | #endif |
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92 | |
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93 | /* managing working directories */ |
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94 | |
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95 | typedef struct eio_pwd *eio_wd; |
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96 | |
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97 | #define EIO_CWD 0 /* the current working directory of the process, guaranteed to be a null pointer */ |
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98 | #define EIO_INVALID_WD ((eio_wd)(int)-1) /* failure return for eio_wd_open */ |
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99 | |
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100 | eio_wd eio_wd_open_sync (eio_wd wd, const char *path); |
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101 | void eio_wd_close_sync (eio_wd wd); |
88 | |
102 | |
89 | /* for readdir */ |
103 | /* for readdir */ |
90 | |
104 | |
91 | /* eio_readdir flags */ |
105 | /* eio_readdir flags */ |
92 | enum |
106 | enum |
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164 | |
178 | |
165 | /* the eio request structure */ |
179 | /* the eio request structure */ |
166 | enum |
180 | enum |
167 | { |
181 | { |
168 | EIO_CUSTOM, |
182 | EIO_CUSTOM, |
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183 | EIO_WD_OPEN, EIO_WD_CLOSE, |
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184 | |
169 | EIO_OPEN, EIO_CLOSE, EIO_DUP2, |
185 | EIO_CLOSE, EIO_DUP2, |
170 | EIO_READ, EIO_WRITE, |
186 | EIO_SEEK, EIO_READ, EIO_WRITE, |
171 | EIO_READAHEAD, EIO_SENDFILE, |
187 | EIO_READAHEAD, EIO_SENDFILE, |
172 | EIO_STAT, EIO_LSTAT, EIO_FSTAT, |
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173 | EIO_STATVFS, EIO_FSTATVFS, |
188 | EIO_FSTAT, EIO_FSTATVFS, |
174 | EIO_TRUNCATE, EIO_FTRUNCATE, |
189 | EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, |
175 | EIO_UTIME, EIO_FUTIME, |
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176 | EIO_CHMOD, EIO_FCHMOD, |
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177 | EIO_CHOWN, EIO_FCHOWN, |
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178 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, |
190 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, |
179 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, |
191 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, |
180 | EIO_MLOCK, EIO_MLOCKALL, |
192 | EIO_MLOCK, EIO_MLOCKALL, |
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193 | EIO_GROUP, EIO_NOP, |
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194 | EIO_BUSY, |
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195 | |
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196 | /* these use wd + ptr1, but are emulated */ |
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197 | EIO_REALPATH, |
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198 | EIO_STATVFS, |
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199 | EIO_READDIR, |
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200 | |
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201 | /* all the following requests use wd + ptr1 as path in xxxat functions */ |
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202 | EIO_OPEN, |
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203 | EIO_STAT, EIO_LSTAT, |
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204 | EIO_TRUNCATE, |
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205 | EIO_UTIME, |
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206 | EIO_CHMOD, |
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207 | EIO_CHOWN, |
181 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
208 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
182 | EIO_MKNOD, EIO_READDIR, |
209 | EIO_MKNOD, |
183 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, EIO_REALPATH, |
210 | EIO_LINK, EIO_SYMLINK, EIO_READLINK, |
184 | EIO_GROUP, EIO_NOP, |
211 | |
185 | EIO_BUSY |
212 | EIO_REQ_TYPE_NUM |
186 | }; |
213 | }; |
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214 | |
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215 | /* seek whence modes */ |
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216 | /* these are guaranteed to hasve the traditional 0, 1, 2 values, */ |
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217 | /* so you might as wlel use those */ |
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218 | enum |
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219 | { |
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220 | EIO_SEEK_SET = 0, |
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221 | EIO_SEEK_CUR = 1, |
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222 | EIO_SEEK_END = 2 |
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223 | }; |
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224 | |
187 | |
225 | |
188 | /* mlockall constants */ |
226 | /* mlockall constants */ |
189 | enum |
227 | enum |
190 | { |
228 | { |
191 | EIO_MCL_CURRENT = 1, |
229 | EIO_MCL_CURRENT = 1, |
192 | EIO_MCL_FUTURE = 2, |
230 | EIO_MCL_FUTURE = 2 |
193 | }; |
231 | }; |
194 | |
232 | |
195 | /* request priorities */ |
233 | /* request priorities */ |
196 | |
234 | |
197 | enum { |
235 | enum { |
198 | EIO_PRI_MIN = -4, |
236 | EIO_PRI_MIN = -4, |
199 | EIO_PRI_MAX = 4, |
237 | EIO_PRI_MAX = 4, |
200 | EIO_PRI_DEFAULT = 0, |
238 | EIO_PRI_DEFAULT = 0 |
201 | }; |
239 | }; |
202 | |
240 | |
203 | /* eio request structure */ |
241 | /* eio request structure */ |
204 | /* this structure is mostly read-only */ |
242 | /* this structure is mostly read-only */ |
205 | /* when initialising it, all members must be zero-initialised */ |
243 | /* when initialising it, all members must be zero-initialised */ |
206 | struct eio_req |
244 | struct eio_req |
207 | { |
245 | { |
208 | eio_req volatile *next; /* private ETP */ |
246 | eio_req volatile *next; /* private ETP */ |
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247 | |
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248 | eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ |
209 | |
249 | |
210 | eio_ssize_t result; /* result of syscall, e.g. result = read (... */ |
250 | eio_ssize_t result; /* result of syscall, e.g. result = read (... */ |
211 | off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ |
251 | off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ |
212 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ |
252 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ |
213 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
253 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
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215 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
255 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
216 | eio_tstamp nv2; /* utime, futime: mtime */ |
256 | eio_tstamp nv2; /* utime, futime: mtime */ |
217 | |
257 | |
218 | int type; /* EIO_xxx constant ETP */ |
258 | int type; /* EIO_xxx constant ETP */ |
219 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
259 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
220 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range, fallocate: flags */ |
260 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, sync_file_range, fallocate: flags */ |
221 | long int3; /* chown, fchown: gid */ |
261 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
222 | int errorno; /* errno value on syscall return */ |
262 | int errorno; /* errno value on syscall return */ |
223 | |
263 | |
224 | #if __i386 || __amd64 |
264 | #if __i386 || __amd64 |
225 | unsigned char cancelled; |
265 | unsigned char cancelled; |
226 | #else |
266 | #else |
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281 | |
321 | |
282 | /*****************************************************************************/ |
322 | /*****************************************************************************/ |
283 | /* convenience wrappers */ |
323 | /* convenience wrappers */ |
284 | |
324 | |
285 | #ifndef EIO_NO_WRAPPERS |
325 | #ifndef EIO_NO_WRAPPERS |
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326 | eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ |
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327 | eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); |
286 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
328 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
287 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
329 | eio_req *eio_busy (eio_tstamp delay, int pri, eio_cb cb, void *data); /* ties a thread for this long, simulating busyness */ |
288 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
330 | eio_req *eio_sync (int pri, eio_cb cb, void *data); |
289 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
331 | eio_req *eio_fsync (int fd, int pri, eio_cb cb, void *data); |
290 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
332 | eio_req *eio_fdatasync (int fd, int pri, eio_cb cb, void *data); |
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333 | eio_req *eio_syncfs (int fd, int pri, eio_cb cb, void *data); |
291 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
334 | eio_req *eio_msync (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
292 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
335 | eio_req *eio_mtouch (void *addr, size_t length, int flags, int pri, eio_cb cb, void *data); |
293 | eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); |
336 | eio_req *eio_mlock (void *addr, size_t length, int pri, eio_cb cb, void *data); |
294 | eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); |
337 | eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); |
295 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
338 | eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); |
296 | eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); |
339 | eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); |
297 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
340 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
298 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
341 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
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342 | eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data); |
299 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
343 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
300 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
344 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
301 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
345 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
302 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
346 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
303 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
347 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |