1 | /* |
1 | /* |
2 | * libeio API header |
2 | * libeio API header |
3 | * |
3 | * |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012 Marc Alexander Lehmann <libeio@schmorp.de> |
4 | * Copyright (c) 2007,2008,2009,2010,2011,2012,2015 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, |
… | |
… | |
169 | |
169 | |
170 | /* eio_fallocate flags */ |
170 | /* eio_fallocate flags */ |
171 | enum |
171 | enum |
172 | { |
172 | { |
173 | /* these MUST match the value in linux/falloc.h */ |
173 | /* these MUST match the value in linux/falloc.h */ |
174 | EIO_FALLOC_FL_KEEP_SIZE = 1, |
174 | EIO_FALLOC_FL_KEEP_SIZE = 0x01, |
175 | EIO_FALLOC_FL_PUNCH_HOLE = 2 |
175 | EIO_FALLOC_FL_PUNCH_HOLE = 0x02, |
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176 | EIO_FALLOC_FL_COLLAPSE_RANGE = 0x08, |
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177 | EIO_FALLOC_FL_ZERO_RANGE = 0x10 |
176 | }; |
178 | }; |
177 | |
179 | |
178 | /* timestamps and differences - feel free to use double in your code directly */ |
180 | /* timestamps and differences - feel free to use double in your code directly */ |
179 | typedef double eio_tstamp; |
181 | typedef double eio_tstamp; |
180 | |
182 | |
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195 | EIO_GROUP, EIO_NOP, |
197 | EIO_GROUP, EIO_NOP, |
196 | EIO_BUSY, |
198 | EIO_BUSY, |
197 | |
199 | |
198 | /* these use wd + ptr1, but are emulated */ |
200 | /* these use wd + ptr1, but are emulated */ |
199 | EIO_REALPATH, |
201 | EIO_REALPATH, |
200 | EIO_STATVFS, |
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201 | EIO_READDIR, |
202 | EIO_READDIR, |
202 | |
203 | |
203 | /* all the following requests use wd + ptr1 as path in xxxat functions */ |
204 | /* all the following requests use wd + ptr1 as path in xxxat functions */ |
204 | EIO_OPEN, |
205 | EIO_OPEN, |
205 | EIO_STAT, EIO_LSTAT, |
206 | EIO_STAT, EIO_LSTAT, EIO_STATVFS, |
206 | EIO_TRUNCATE, |
207 | EIO_TRUNCATE, |
207 | EIO_UTIME, |
208 | EIO_UTIME, |
208 | EIO_CHMOD, |
209 | EIO_CHMOD, |
209 | EIO_CHOWN, |
210 | EIO_CHOWN, |
210 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
211 | EIO_UNLINK, EIO_RMDIR, EIO_MKDIR, EIO_RENAME, |
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255 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
256 | void *ptr1; /* all applicable requests: pathname, old name; readdir: optional eio_dirents */ |
256 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
257 | void *ptr2; /* all applicable requests: new name or memory buffer; readdir: name strings */ |
257 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
258 | eio_tstamp nv1; /* utime, futime: atime; busy: sleep time */ |
258 | eio_tstamp nv2; /* utime, futime: mtime */ |
259 | eio_tstamp nv2; /* utime, futime: mtime */ |
259 | |
260 | |
260 | int type; /* EIO_xxx constant ETP */ |
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261 | int int1; /* all applicable requests: file descriptor; sendfile: output fd; open, msync, mlockall, readdir: flags */ |
261 | 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 */ |
262 | long int2; /* chown, fchown: uid; sendfile: input fd; open, chmod, mkdir, mknod: file mode, seek: whence, sync_file_range, fallocate: flags */ |
263 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
263 | long int3; /* chown, fchown: gid; rename, link: working directory of new name */ |
264 | int errorno; /* errno value on syscall return */ |
264 | int errorno; /* errno value on syscall return */ |
265 | |
265 | |
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266 | unsigned char flags; /* private */ |
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267 | |
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268 | signed char type;/* EIO_xxx constant ETP */ |
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269 | signed char pri; /* the priority ETP */ |
266 | #if __i386 || __amd64 |
270 | #if __i386 || __amd64 |
267 | unsigned char cancelled; |
271 | unsigned char cancelled; /* ETP */ |
268 | #else |
272 | #else |
269 | sig_atomic_t cancelled; |
273 | sig_atomic_t cancelled; /* ETP */ |
270 | #endif |
274 | #endif |
271 | |
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272 | unsigned char flags; /* private */ |
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273 | signed char pri; /* the priority */ |
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274 | |
275 | |
275 | void *data; |
276 | void *data; |
276 | eio_cb finish; |
277 | eio_cb finish; |
277 | void (*destroy)(eio_req *req); /* called when request no longer needed */ |
278 | void (*destroy)(eio_req *req); /* called when request no longer needed */ |
278 | void (*feed)(eio_req *req); /* only used for group requests */ |
279 | void (*feed)(eio_req *req); /* only used for group requests */ |
279 | |
280 | |
280 | EIO_REQ_MEMBERS |
281 | EIO_REQ_MEMBERS |
281 | |
282 | |
282 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private */ |
283 | eio_req *grp, *grp_prev, *grp_next, *grp_first; /* private ETP */ |
283 | }; |
284 | }; |
284 | |
285 | |
285 | /* _private_ request flags */ |
286 | /* _private_ request flags */ |
286 | enum { |
287 | enum { |
287 | EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ |
288 | EIO_FLAG_PTR1_FREE = 0x01, /* need to free(ptr1) */ |