Annotation of src/usr.bin/rsync/extern.h, Revision 1.18
1.18 ! deraadt 1: /* $Id: extern.h,v 1.17 2019/02/16 23:16:54 deraadt Exp $ */
1.1 benno 2: /*
3: * Copyright (c) 2019 Kristaps Dzonsons <kristaps@bsd.lv>
4: *
5: * Permission to use, copy, modify, and distribute this software for any
6: * purpose with or without fee is hereby granted, provided that the above
7: * copyright notice and this permission notice appear in all copies.
8: *
9: * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10: * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11: * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12: * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13: * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14: * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15: * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16: */
17: #ifndef EXTERN_H
18: #define EXTERN_H
19:
20: /*
21: * This is the rsync protocol version that we support.
22: */
23: #define RSYNC_PROTOCOL (27)
24:
25: /*
26: * Maximum amount of file data sent over the wire at once.
27: */
28: #define MAX_CHUNK (32 * 1024)
29:
30: /*
31: * This is the minimum size for a block of data not including those in
32: * the remainder block.
33: */
34: #define BLOCK_SIZE_MIN (700)
35:
36: /*
37: * The sender and receiver use a two-phase synchronisation process.
38: * The first uses two-byte hashes; the second, 16-byte.
39: * (The second must hold a full MD4 digest.)
40: */
41: #define CSUM_LENGTH_PHASE1 (2)
42: #define CSUM_LENGTH_PHASE2 (16)
43:
1.14 florian 44: /*
45: * Use this for debugging deadlocks.
46: * All poll events will use it and catch time-outs.
47: */
48: #define POLL_TIMEOUT (INFTIM)
1.13 florian 49:
1.1 benno 50: /*
51: * Operating mode for a client or a server.
52: * Sender means we synchronise local files with those from remote.
53: * Receiver is the opposite.
54: * This is relative to which host we're running on.
55: */
56: enum fmode {
57: FARGS_SENDER,
58: FARGS_RECEIVER
59: };
60:
61: /*
62: * File arguments given on the command line.
63: * See struct opts.
64: */
65: struct fargs {
66: char *host; /* hostname or NULL if local */
67: char **sources; /* transfer source */
68: size_t sourcesz; /* number of sources */
69: char *sink; /* transfer endpoint */
70: enum fmode mode; /* mode of operation */
71: int remote; /* uses rsync:// or :: for remote */
72: char *module; /* if rsync://, the module */
73: };
74:
75: /*
76: * The subset of stat(2) information that we need.
77: * (There are some parts we don't use yet.)
78: */
79: struct flstat {
1.12 florian 80: mode_t mode; /* mode */
81: uid_t uid; /* user */
82: gid_t gid; /* group */
83: dev_t rdev; /* device type */
84: off_t size; /* size */
85: time_t mtime; /* modification */
1.1 benno 86: unsigned int flags;
1.12 florian 87: #define FLSTAT_TOP_DIR 0x01 /* a top-level directory */
1.1 benno 88:
89: };
90:
91: /*
92: * A list of files with their statistics.
93: */
94: struct flist {
95: char *path; /* path relative to root */
96: const char *wpath; /* "working" path for receiver */
97: struct flstat st; /* file information */
98: char *link; /* symlink target or NULL */
99: };
100:
101: /*
102: * Options passed into the command line.
103: * See struct fargs.
104: */
105: struct opts {
1.3 deraadt 106: int sender; /* --sender */
107: int server; /* --server */
108: int recursive; /* -r */
109: int verbose; /* -v */
110: int dry_run; /* -n */
111: int preserve_times; /* -t */
112: int preserve_perms; /* -p */
113: int preserve_links; /* -l */
1.5 benno 114: int preserve_gids; /* -g */
1.9 florian 115: int preserve_uids; /* -u */
1.3 deraadt 116: int del; /* --delete */
1.12 florian 117: int devices; /* --devices */
118: int specials; /* --specials */
1.3 deraadt 119: char *rsync_path; /* --rsync-path */
1.4 deraadt 120: char *ssh_prog; /* --rsh or -e */
1.18 ! deraadt 121: char *port; /* --port */
1.1 benno 122: };
123:
124: /*
125: * An individual block description for a file.
126: * See struct blkset.
127: */
128: struct blk {
129: off_t offs; /* offset in file */
130: size_t idx; /* block index */
131: size_t len; /* bytes in block */
132: uint32_t chksum_short; /* fast checksum */
133: unsigned char chksum_long[CSUM_LENGTH_PHASE2]; /* slow checksum */
134: };
135:
1.14 florian 136: enum blkstatst {
137: BLKSTAT_NONE = 0,
138: BLKSTAT_DATASZ,
139: BLKSTAT_DATA,
140: BLKSTAT_TOK,
141: BLKSTAT_HASH,
142: BLKSTAT_DONE
143: };
144:
1.1 benno 145: /*
1.13 florian 146: * Information for the sender updating receiver blocks reentrantly.
147: */
148: struct blkstat {
1.14 florian 149: off_t offs; /* position in sender file */
150: off_t total; /* total amount processed */
151: off_t dirty; /* total amount sent */
152: size_t hint; /* optimisation: next probable match */
153: void *map; /* mapped file or MAP_FAILED otherwise */
154: size_t mapsz; /* size of file or zero */
155: int fd; /* descriptor girding the map */
156: enum blkstatst curst; /* FSM for sending file blocks */
157: off_t curpos; /* sending: position in file to send */
158: off_t curlen; /* sending: length of send */
159: int32_t curtok; /* sending: next matching token or zero */
1.13 florian 160: };
161:
162: /*
1.1 benno 163: * When transferring file contents, we break the file down into blocks
164: * and work with those.
165: */
166: struct blkset {
167: off_t size; /* file size */
168: size_t rem; /* terminal block length if non-zero */
169: size_t len; /* block length */
170: size_t csum; /* checksum length */
171: struct blk *blks; /* all blocks */
172: size_t blksz; /* number of blks */
173: };
174:
175: /*
176: * Values required during a communication session.
177: */
178: struct sess {
179: const struct opts *opts; /* system options */
180: int32_t seed; /* checksum seed */
181: int32_t lver; /* local version */
182: int32_t rver; /* remote version */
183: uint64_t total_read; /* non-logging wire/reads */
184: uint64_t total_size; /* total file size */
185: uint64_t total_write; /* non-logging wire/writes */
186: int mplex_reads; /* multiplexing reads? */
187: size_t mplex_read_remain; /* remaining bytes */
188: int mplex_writes; /* multiplexing writes? */
189: };
190:
1.6 benno 191: /*
192: * Combination of name and numeric id for groups and users.
193: */
194: struct ident {
195: int32_t id; /* the gid_t or uid_t */
196: int32_t mapped; /* if receiving, the mapped gid */
197: char *name; /* resolved name */
198: };
199:
1.1 benno 200: struct download;
201: struct upload;
202:
1.17 deraadt 203: #define MINIMUM(a, b) (((a) < (b)) ? (a) : (b))
1.14 florian 204:
1.1 benno 205: #define LOG0(_sess, _fmt, ...) \
206: rsync_log((_sess), __FILE__, __LINE__, -1, (_fmt), ##__VA_ARGS__)
207: #define LOG1(_sess, _fmt, ...) \
208: rsync_log((_sess), __FILE__, __LINE__, 0, (_fmt), ##__VA_ARGS__)
209: #define LOG2(_sess, _fmt, ...) \
210: rsync_log((_sess), __FILE__, __LINE__, 1, (_fmt), ##__VA_ARGS__)
211: #define LOG3(_sess, _fmt, ...) \
212: rsync_log((_sess), __FILE__, __LINE__, 2, (_fmt), ##__VA_ARGS__)
213: #define LOG4(_sess, _fmt, ...) \
214: rsync_log((_sess), __FILE__, __LINE__, 3, (_fmt), ##__VA_ARGS__)
215: #define ERRX1(_sess, _fmt, ...) \
216: rsync_errx1((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
217: #define WARNX(_sess, _fmt, ...) \
218: rsync_warnx((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
219: #define WARN(_sess, _fmt, ...) \
220: rsync_warn((_sess), 0, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
221: #define WARN1(_sess, _fmt, ...) \
222: rsync_warn((_sess), 1, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
223: #define WARN2(_sess, _fmt, ...) \
224: rsync_warn((_sess), 2, __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
225: #define ERR(_sess, _fmt, ...) \
226: rsync_err((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
227: #define ERRX(_sess, _fmt, ...) \
228: rsync_errx((_sess), __FILE__, __LINE__, (_fmt), ##__VA_ARGS__)
229:
230: __BEGIN_DECLS
231:
232: void rsync_log(struct sess *,
233: const char *, size_t, int, const char *, ...)
234: __attribute__((format(printf, 5, 6)));
235: void rsync_warnx1(struct sess *,
236: const char *, size_t, const char *, ...)
237: __attribute__((format(printf, 4, 5)));
238: void rsync_warn(struct sess *, int,
239: const char *, size_t, const char *, ...)
240: __attribute__((format(printf, 5, 6)));
241: void rsync_warnx(struct sess *, const char *,
242: size_t, const char *, ...)
243: __attribute__((format(printf, 4, 5)));
244: void rsync_err(struct sess *, const char *,
245: size_t, const char *, ...)
246: __attribute__((format(printf, 4, 5)));
247: void rsync_errx(struct sess *, const char *,
248: size_t, const char *, ...)
249: __attribute__((format(printf, 4, 5)));
250: void rsync_errx1(struct sess *, const char *,
251: size_t, const char *, ...)
252: __attribute__((format(printf, 4, 5)));
253:
1.2 benno 254: int flist_del(struct sess *, int,
1.1 benno 255: const struct flist *, size_t);
256: int flist_gen(struct sess *, size_t, char **,
257: struct flist **, size_t *);
258: int flist_gen_local(struct sess *, const char *,
259: struct flist **, size_t *);
260: void flist_free(struct flist *, size_t);
261: int flist_recv(struct sess *, int,
262: struct flist **, size_t *);
263: int flist_send(struct sess *, int, int,
264: const struct flist *, size_t);
1.2 benno 265: int flist_gen_dels(struct sess *, const char *,
1.1 benno 266: struct flist **, size_t *,
267: const struct flist *, size_t);
268:
269: char **fargs_cmdline(struct sess *, const struct fargs *);
270:
271: int io_read_buf(struct sess *, int, void *, size_t);
272: int io_read_byte(struct sess *, int, uint8_t *);
273: int io_read_check(struct sess *, int);
274: int io_read_flush(struct sess *, int);
275: int io_read_int(struct sess *, int, int32_t *);
276: int io_read_long(struct sess *, int, int64_t *);
277: int io_read_size(struct sess *, int, size_t *);
278: int io_read_ulong(struct sess *, int, uint64_t *);
279: int io_write_buf(struct sess *, int, const void *, size_t);
280: int io_write_byte(struct sess *, int, uint8_t);
281: int io_write_int(struct sess *, int, int32_t);
282: int io_write_line(struct sess *, int, const char *);
283: int io_write_long(struct sess *, int, int64_t);
284:
1.14 florian 285: int io_lowbuffer_alloc(struct sess *, void **,
286: size_t *, size_t *, size_t);
287: void io_lowbuffer_int(struct sess *, void *,
288: size_t *, size_t, int32_t);
289: void io_lowbuffer_buf(struct sess *, void *,
290: size_t *, size_t, const void *, size_t);
291:
1.2 benno 292: void io_buffer_int(struct sess *, void *,
1.1 benno 293: size_t *, size_t, int32_t);
1.2 benno 294: void io_buffer_buf(struct sess *, void *,
1.1 benno 295: size_t *, size_t, const void *, size_t);
296:
1.2 benno 297: void io_unbuffer_int(struct sess *, const void *,
1.1 benno 298: size_t *, size_t, int32_t *);
1.2 benno 299: int io_unbuffer_size(struct sess *, const void *,
1.1 benno 300: size_t *, size_t, size_t *);
1.2 benno 301: void io_unbuffer_buf(struct sess *, const void *,
1.1 benno 302: size_t *, size_t, void *, size_t);
303:
304: void rsync_child(const struct opts *, int, const struct fargs *)
305: __attribute__((noreturn));
306: int rsync_receiver(struct sess *, int, int, const char *);
307: int rsync_sender(struct sess *, int, int, size_t, char **);
308: int rsync_client(const struct opts *, int, const struct fargs *);
309: int rsync_socket(const struct opts *, const struct fargs *);
310: int rsync_server(const struct opts *, size_t, char *[]);
311: int rsync_downloader(struct download *, struct sess *, int *);
1.15 florian 312: int rsync_set_metadata(struct sess *, int, int,
1.10 florian 313: const struct flist *, const char *);
1.16 deraadt 314: int rsync_set_metadata_at(struct sess *, int, int,
1.12 florian 315: const struct flist *, const char *);
1.2 benno 316: int rsync_uploader(struct upload *,
1.1 benno 317: int *, struct sess *, int *);
318: int rsync_uploader_tail(struct upload *, struct sess *);
319:
320: struct download *download_alloc(struct sess *, int,
321: const struct flist *, size_t, int);
322: void download_free(struct download *);
1.12 florian 323: struct upload *upload_alloc(struct sess *, const char *, int, int, size_t,
1.1 benno 324: const struct flist *, size_t, mode_t);
325: void upload_free(struct upload *);
326:
327: struct blkset *blk_recv(struct sess *, int, const char *);
328: int blk_recv_ack(struct sess *,
329: int, const struct blkset *, int32_t);
1.14 florian 330: void blk_match(struct sess *, const struct blkset *,
1.13 florian 331: const char *, struct blkstat *);
1.1 benno 332: int blk_send(struct sess *, int, size_t,
333: const struct blkset *, const char *);
334: int blk_send_ack(struct sess *, int, struct blkset *);
335:
336: uint32_t hash_fast(const void *, size_t);
337: void hash_slow(const void *, size_t,
338: unsigned char *, const struct sess *);
339: void hash_file(const void *, size_t,
340: unsigned char *, const struct sess *);
341:
342: int mkpath(struct sess *, char *);
1.11 florian 343:
344: int mkstempat(int, char *);
345: char *mkstemplinkat(char*, int, char *);
1.12 florian 346: char *mkstempfifoat(int, char *);
347: char *mkstempnodat(int, char *, mode_t, dev_t);
348: char *mkstempsock(const char *, char *);
1.11 florian 349: int mktemplate(char **, const char *, int);
1.1 benno 350:
351: char *symlink_read(struct sess *, const char *);
352: char *symlinkat_read(struct sess *, int, const char *);
353:
354: int sess_stats_send(struct sess *, int);
355: int sess_stats_recv(struct sess *, int);
1.6 benno 356:
1.9 florian 357: int idents_add(struct sess *, int, struct ident **, size_t *,
358: int32_t);
359: void idents_assign_gid(struct sess *,
360: struct flist *, size_t, const struct ident *, size_t);
361: void idents_assign_uid(struct sess *,
362: struct flist *, size_t, const struct ident *, size_t);
1.6 benno 363: void idents_free(struct ident *, size_t);
1.7 benno 364: int idents_recv(struct sess *, int, struct ident **, size_t *);
1.9 florian 365: void idents_remap(struct sess *, int, struct ident *, size_t);
1.6 benno 366: int idents_send(struct sess *, int, const struct ident *, size_t);
1.1 benno 367:
368: __END_DECLS
369:
370: #endif /*!EXTERN_H*/
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