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Comparing libeio/eio.h (file contents):
Revision 1.49 by root, Tue Sep 27 12:36:19 2011 UTC vs.
Revision 1.60 by root, Fri Jun 23 23:50:25 2017 UTC

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) 2007,2008,2009,2010,2011,2012,2015,2016 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 *
10 * 1. Redistributions of source code must retain the above copyright notice, 10 * 1. Redistributions of source code must retain the above copyright notice,
11 * this list of conditions and the following disclaimer. 11 * this list of conditions and the following disclaimer.
12 * 12 *
13 * 2. Redistributions in binary form must reproduce the above copyright 13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the 14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution. 15 * documentation and/or other materials provided with the distribution.
16 * 16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER- 18 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MER-
19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * CHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE- 20 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPE-
21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * CIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
… …
168}; 168};
169 169
170/* eio_fallocate flags */ 170/* eio_fallocate flags */
171enum 171enum
172{ 172{
173 EIO_FALLOC_FL_KEEP_SIZE = 1 /* MUST match the value in linux/falloc.h */ 173 /* these MUST match the value in linux/falloc.h */
174 EIO_FALLOC_FL_KEEP_SIZE = 0x01,
175 EIO_FALLOC_FL_PUNCH_HOLE = 0x02,
176 EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08,
177 EIO_FALLOC_FL_ZERO_RANGE = 0x10,
178 EIO_FALLOC_FL_INSERT_RANGE = 0x20,
179 EIO_FALLOC_FL_UNSHARE_RANGE = 0x40
180};
181
182/* eio_rename flags */
183enum
184{
185 /* these MUST match the value in linux/fs.h */
186 EIO_RENAME_NOREPLACE = 1 << 0,
187 EIO_RENAME_EXCHANGE = 1 << 1,
188 EIO_RENAME_WHITEOUT = 1 << 2
174}; 189};
175 190
176/* timestamps and differences - feel free to use double in your code directly */ 191/* timestamps and differences - feel free to use double in your code directly */
177typedef double eio_tstamp; 192typedef double eio_tstamp;
178 193
… …
181{ 196{
182 EIO_CUSTOM, 197 EIO_CUSTOM,
183 EIO_WD_OPEN, EIO_WD_CLOSE, 198 EIO_WD_OPEN, EIO_WD_CLOSE,
184 199
185 EIO_CLOSE, EIO_DUP2, 200 EIO_CLOSE, EIO_DUP2,
186 EIO_READ, EIO_WRITE, 201 EIO_SEEK, EIO_READ, EIO_WRITE, EIO_FCNTL, EIO_IOCTL,
187 EIO_READAHEAD, EIO_SENDFILE, 202 EIO_READAHEAD, EIO_SENDFILE,
188 EIO_FSTAT, EIO_FSTATVFS, 203 EIO_FSTAT, EIO_FSTATVFS,
189 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN, 204 EIO_FTRUNCATE, EIO_FUTIME, EIO_FCHMOD, EIO_FCHOWN,
190 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS, 205 EIO_SYNC, EIO_FSYNC, EIO_FDATASYNC, EIO_SYNCFS,
191 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE, 206 EIO_MSYNC, EIO_MTOUCH, EIO_SYNC_FILE_RANGE, EIO_FALLOCATE,
… …
193 EIO_GROUP, EIO_NOP, 208 EIO_GROUP, EIO_NOP,
194 EIO_BUSY, 209 EIO_BUSY,
195 210
196 /* these use wd + ptr1, but are emulated */ 211 /* these use wd + ptr1, but are emulated */
197 EIO_REALPATH, 212 EIO_REALPATH,
198 EIO_STATVFS,
199 EIO_READDIR, 213 EIO_READDIR,
200 214
201 /* all the following requests use wd + ptr1 as path in xxxat functions */ 215 /* all the following requests use wd + ptr1 as path in xxxat functions */
202 EIO_OPEN, 216 EIO_OPEN,
203 EIO_STAT, EIO_LSTAT, 217 EIO_STAT, EIO_LSTAT, EIO_STATVFS,
204 EIO_TRUNCATE, 218 EIO_TRUNCATE,
205 EIO_UTIME, 219 EIO_UTIME,
206 EIO_CHMOD, 220 EIO_CHMOD,
207 EIO_CHOWN, 221 EIO_CHOWN,
208 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, 222 EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME,
… …
210 EIO_LINK, EIO_SYMLINK, EIO_READLINK, 224 EIO_LINK, EIO_SYMLINK, EIO_READLINK,
211 225
212 EIO_REQ_TYPE_NUM 226 EIO_REQ_TYPE_NUM
213}; 227};
214 228
229/* seek whence modes */
230/* these are guaranteed to hasve the traditional 0, 1, 2 values, */
231/* so you might as wlel use those */
232enum
233{
234 EIO_SEEK_SET = 0,
235 EIO_SEEK_CUR = 1,
236 EIO_SEEK_END = 2
237};
238
239
215/* mlockall constants */ 240/* mlockall constants */
216enum 241enum
217{ 242{
218 EIO_MCL_CURRENT = 1, 243 EIO_MCL_CURRENT = 1,
219 EIO_MCL_FUTURE = 2, 244 EIO_MCL_FUTURE = 2
220}; 245};
221 246
222/* request priorities */ 247/* request priorities */
223 248
224enum { 249enum {
225 EIO_PRI_MIN = -4, 250 EIO_PRI_MIN = -4,
226 EIO_PRI_MAX = 4, 251 EIO_PRI_MAX = 4,
227 EIO_PRI_DEFAULT = 0, 252 EIO_PRI_DEFAULT = 0
228}; 253};
229 254
230/* eio request structure */ 255/* eio request structure */
231/* this structure is mostly read-only */ 256/* this structure is mostly read-only */
232/* when initialising it, all members must be zero-initialised */ 257/* when initialising it, all members must be zero-initialised */
… …
237 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */ 262 eio_wd wd; /* all applicable requests: working directory of pathname, old name; wd_open: return wd */
238 263
239 eio_ssize_t result; /* result of syscall, e.g. result = read (... */ 264 eio_ssize_t result; /* result of syscall, e.g. result = read (... */
240 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */ 265 off_t offs; /* read, write, truncate, readahead, sync_file_range, fallocate: file offset, mknod: dev_t */
241 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */ 266 size_t size; /* read, write, readahead, sendfile, msync, mlock, sync_file_range, fallocate: length */
242 void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ 267 void *ptr1; /* all applicable requests: pathname, old name, readdir: optional eio_dirents */
243 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ 268 void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */
244 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ 269 eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */
245 eio_tstamp nv2; /* utime, futime: mtime */ 270 eio_tstamp nv2; /* utime, futime: mtime */
246 271
247 int type; /* EIO_xxx constant ETP */
248 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ 272 int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */
249 long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, sync_file_range, fallocate: flags */ 273 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 */
250 long int3; /* chown, fchown: gid; rename, link: working directory of new name */ 274 long int3; /* chown, fchown: gid; rename, link: working directory of new name */
251 int errorno; /* errno value on syscall return */ 275 int errorno; /* errno value on syscall return */
252 276
277 unsigned char flags; /* private */
278
279 signed char type;/* EIO_xxx constant ETP */
280 signed char pri; /* the priority ETP */
253#if __i386 || __amd64 281#if __i386 || __amd64
254 unsigned char cancelled; 282 unsigned char cancelled; /* ETP */
255#else 283#else
256 sig_atomic_t cancelled; 284 sig_atomic_t cancelled; /* ETP */
257#endif 285#endif
258
259 unsigned char flags; /* private */
260 signed char pri; /* the priority */
261 286
262 void *data; 287 void *data;
263 eio_cb finish; 288 eio_cb finish;
264 void (*destroy)(eio_req *req); /* called when request no longer needed */ 289 void (*destroy)(eio_req *req); /* called when request no longer needed */
265 void (*feed)(eio_req *req); /* only used for group requests */ 290 void (*feed)(eio_req *req); /* only used for group requests */
266 291
267 EIO_REQ_MEMBERS 292 EIO_REQ_MEMBERS
268 293
269 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ 294 eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */
270}; 295};
271 296
272/* _private_ request flags */ 297/* _private_ request flags */
273enum { 298enum {
274 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ 299 EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */
275 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */ 300 EIO_FLAG_PTR2_FREE = 0x02, /* need to free(ptr2) */
276 EIO_FLAG_GROUPADD = 0x04 /* some request was added to the group */
277}; 301};
278 302
279/* undocumented/unsupported/private helper */ 303/* undocumented/unsupported/private helper */
280/*void eio_page_align (void **addr, size_t *length);*/ 304/*void eio_page_align (void **addr, size_t *length);*/
281 305
… …
308unsigned int eio_npending (void); /* number of finished but unhandled requests */ 332unsigned int eio_npending (void); /* number of finished but unhandled requests */
309unsigned int eio_nthreads (void); /* number of worker threads in use currently */ 333unsigned int eio_nthreads (void); /* number of worker threads in use currently */
310 334
311/*****************************************************************************/ 335/*****************************************************************************/
312/* convenience wrappers */ 336/* convenience wrappers */
337/* these do not expose advanced syscalls and directory fds */
313 338
314#ifndef EIO_NO_WRAPPERS 339#ifndef EIO_NO_WRAPPERS
315eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */ 340eio_req *eio_wd_open (const char *path, int pri, eio_cb cb, void *data); /* result=wd */
316eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data); 341eio_req *eio_wd_close (eio_wd wd, int pri, eio_cb cb, void *data);
317eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */ 342eio_req *eio_nop (int pri, eio_cb cb, void *data); /* does nothing except go through the whole process */
… …
326eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data); 351eio_req *eio_mlockall (int flags, int pri, eio_cb cb, void *data);
327eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data); 352eio_req *eio_sync_file_range (int fd, off_t offset, size_t nbytes, unsigned int flags, int pri, eio_cb cb, void *data);
328eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data); 353eio_req *eio_fallocate (int fd, int mode, off_t offset, size_t len, int pri, eio_cb cb, void *data);
329eio_req *eio_close (int fd, int pri, eio_cb cb, void *data); 354eio_req *eio_close (int fd, int pri, eio_cb cb, void *data);
330eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data); 355eio_req *eio_readahead (int fd, off_t offset, size_t length, int pri, eio_cb cb, void *data);
356eio_req *eio_seek (int fd, off_t offset, int whence, int pri, eio_cb cb, void *data);
331eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 357eio_req *eio_read (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
332eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data); 358eio_req *eio_write (int fd, void *buf, size_t length, off_t offset, int pri, eio_cb cb, void *data);
359eio_req *eio_fcntl (int fd, int cmd, void *arg, int pri, eio_cb cb, void *data);
360eio_req *eio_ioctl (int fd, unsigned long request, void *buf, int pri, eio_cb cb, void *data);
333eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 361eio_req *eio_fstat (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
334eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */ 362eio_req *eio_fstatvfs (int fd, int pri, eio_cb cb, void *data); /* stat buffer=ptr2 allocated dynamically */
335eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data); 363eio_req *eio_futime (int fd, eio_tstamp atime, eio_tstamp mtime, int pri, eio_cb cb, void *data);
336eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data); 364eio_req *eio_ftruncate (int fd, off_t offset, int pri, eio_cb cb, void *data);
337eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data); 365eio_req *eio_fchmod (int fd, mode_t mode, int pri, eio_cb cb, void *data);

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