1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2015 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2015,2016 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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175 | EIO_FALLOC_FL_PUNCH_HOLE = 0x02, |
175 | EIO_FALLOC_FL_PUNCH_HOLE = 0x02, |
176 | EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08, |
176 | EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08, |
177 | EIO_FALLOC_FL_ZERO_RANGE = 0x10 |
177 | EIO_FALLOC_FL_ZERO_RANGE = 0x10 |
178 | }; |
178 | }; |
179 | |
179 | |
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180 | /* eio_rename flags */ |
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181 | enum |
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182 | { |
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183 | /* these MUST match the value in linux/fs.h */ |
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184 | EIO_RENAME_NOREPLACE = 1 << 0, |
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185 | EIO_RENAME_EXCHANGE = 1 << 1, |
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186 | EIO_RENAME_WHITEOUT = 1 << 2 |
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187 | }; |
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188 | |
180 | /* timestamps and differences - feel free to use double in your code directly */ |
189 | /* timestamps and differences - feel free to use double in your code directly */ |
181 | typedef double eio_tstamp; |
190 | typedef double eio_tstamp; |
182 | |
191 | |
183 | /* the eio request structure */ |
192 | /* the eio request structure */ |
184 | enum |
193 | enum |
185 | { |
194 | { |
186 | EIO_CUSTOM, |
195 | EIO_CUSTOM, |
187 | EIO_WD_OPEN, EIO_WD_CLOSE, |
196 | EIO_WD_OPEN, EIO_WD_CLOSE, |
188 | |
197 | |
189 | EIO_CLOSE, EIO_DUP2, |
198 | EIO_CLOSE, EIO_DUP2, |
190 | EIO_SEEK, EIO_READ, EIO_WRITE, |
199 | EIO_SEEK, EIO_READ, EIO_WRITE, EIO_FCNTL, EIO_IOCTL, |
191 | EIO_READAHEAD, EIO_SENDFILE, |
200 | EIO_READAHEAD, EIO_SENDFILE, |
192 | EIO_FSTAT, EIO_FSTATVFS, |
201 | EIO_FSTAT, EIO_FSTATVFS, |
193 | EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, |
202 | EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, |
194 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, |
203 | EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, |
195 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, |
204 | EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, |
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251 | eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ |
260 | eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ |
252 | |
261 | |
253 | eio_ssize_t result; /* result of syscall, e.g. result = read (... */ |
262 | eio_ssize_t result; /* result of syscall, e.g. result = read (... */ |
254 | off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ |
263 | off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ |
255 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ |
264 | size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ |
256 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
265 | void *ptr1; /* all applicable requests: pathname, old name, readdir: optional eio_dirents */ |
257 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
266 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
258 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
267 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
259 | eio_tstamp nv2; /* utime, futime: mtime */ |
268 | eio_tstamp nv2; /* utime, futime: mtime */ |
260 | |
269 | |
261 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
270 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
262 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, sync_file_range, fallocate: flags */ |
271 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, fcntl, ioctl: request, sync_file_range, fallocate, rename: flags */ |
263 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
272 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
264 | int errorno; /* errno value on syscall return */ |
273 | int errorno; /* errno value on syscall return */ |
265 | |
274 | |
266 | unsigned char flags; /* private */ |
275 | unsigned char flags; /* private */ |
267 | |
276 | |
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285 | |
294 | |
286 | /* _private_ request flags */ |
295 | /* _private_ request flags */ |
287 | enum { |
296 | enum { |
288 | EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ |
297 | EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ |
289 | EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ |
298 | EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ |
290 | EIO_FLAG_GROUPADD = 0x04 /* some request was added to the group */ |
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291 | }; |
299 | }; |
292 | |
300 | |
293 | /* undocumented/unsupported/private helper */ |
301 | /* undocumented/unsupported/private helper */ |
294 | /*void eio_page_align (void **addr, size_t *length);*/ |
302 | /*void eio_page_align (void **addr, size_t *length);*/ |
295 | |
303 | |
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322 | unsigned int eio_npending (void); /* number of finished but unhandled requests */ |
330 | unsigned int eio_npending (void); /* number of finished but unhandled requests */ |
323 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
331 | unsigned int eio_nthreads (void); /* number of worker threads in use currently */ |
324 | |
332 | |
325 | /*****************************************************************************/ |
333 | /*****************************************************************************/ |
326 | /* convenience wrappers */ |
334 | /* convenience wrappers */ |
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335 | /* these do not expose advanced syscalls and directory fds */ |
327 | |
336 | |
328 | #ifndef EIO_NO_WRAPPERS |
337 | #ifndef EIO_NO_WRAPPERS |
329 | eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ |
338 | eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ |
330 | eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); |
339 | eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); |
331 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
340 | eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ |
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343 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
352 | eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); |
344 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
353 | eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); |
345 | eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data); |
354 | eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data); |
346 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
355 | eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
347 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
356 | eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); |
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357 | eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data); |
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358 | eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data); |
348 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
359 | eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
349 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
360 | eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ |
350 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
361 | eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); |
351 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
362 | eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); |
352 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |
363 | eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); |