2 Copyright (c) 2009 Frank Lahm <franklahm@gmail.com>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
17 #endif /* HAVE_CONFIG_H */
24 #include <sys/types.h>
28 #include <arpa/inet.h>
30 #include <atalk/adouble.h>
32 #include <atalk/afp.h>
33 #include <atalk/logger.h>
34 #include <atalk/volume.h>
35 #include <atalk/vfs.h>
36 #include <atalk/util.h>
37 #include <atalk/unix.h>
38 #include <atalk/compat.h>
40 /**********************************************************************************
41 * EA VFS funcs for storing EAs in nativa filesystem EAs
42 **********************************************************************************/
45 * Function: sys_get_easize
47 * Purpose: get size of a native EA
51 * vol (r) current volume
52 * rbuf (w) DSI reply buffer
53 * rbuflen (rw) current length of data in reply buffer
55 * oflag (r) link and create flag
56 * attruname (r) name of attribute
58 * Returns: AFP code: AFP_OK on success or appropiate AFP error code
62 * Copies EA size into rbuf in network order. Increments *rbuflen +4.
64 int sys_get_easize(VFS_FUNC_ARGS_EA_GETSIZE)
69 LOG(log_debug7, logtype_afpd, "sys_getextattr_size(%s): attribute: \"%s\"", uname, attruname);
71 if ((oflag & O_NOFOLLOW) ) {
72 ret = sys_lgetxattr(uname, attruname, rbuf +4, 0);
75 ret = sys_getxattr(uname, attruname, rbuf +4, 0);
82 case OPEN_NOFOLLOW_ERRNO:
83 /* its a symlink and client requested O_NOFOLLOW */
84 LOG(log_debug, logtype_afpd, "sys_getextattr_size(%s): symlink with kXAttrNoFollow", uname);
92 LOG(log_debug, logtype_afpd, "sys_getextattr_size: error: %s", strerror(errno));
97 if (ret > MAX_EA_SIZE)
100 /* Start building reply packet */
101 LOG(log_debug7, logtype_afpd, "sys_getextattr_size(%s): attribute: \"%s\", size: %u", uname, attruname, ret);
103 /* length of attribute data */
104 attrsize = htonl((uint32_t)ret);
105 memcpy(rbuf, &attrsize, 4);
113 * Function: sys_get_eacontent
115 * Purpose: copy native EA into rbuf
119 * vol (r) current volume
120 * rbuf (w) DSI reply buffer
121 * rbuflen (rw) current length of data in reply buffer
123 * oflag (r) link and create flag
124 * attruname (r) name of attribute
125 * maxreply (r) maximum EA size as of current specs/real-life
127 * Returns: AFP code: AFP_OK on success or appropiate AFP error code
131 * Copies EA into rbuf. Increments *rbuflen accordingly.
133 int sys_get_eacontent(VFS_FUNC_ARGS_EA_GETCONTENT)
138 /* Start building reply packet */
140 maxreply -= MAX_REPLY_EXTRA_BYTES;
142 if (maxreply > MAX_EA_SIZE)
143 maxreply = MAX_EA_SIZE;
145 LOG(log_debug7, logtype_afpd, "sys_getextattr_content(%s): attribute: \"%s\", size: %u", uname, attruname, maxreply);
147 if ((oflag & O_NOFOLLOW) ) {
148 ret = sys_lgetxattr(uname, attruname, rbuf +4, maxreply);
151 ret = sys_getxattr(uname, attruname, rbuf +4, maxreply);
158 case OPEN_NOFOLLOW_ERRNO:
159 /* its a symlink and client requested O_NOFOLLOW */
160 LOG(log_debug, logtype_afpd, "sys_getextattr_content(%s): symlink with kXAttrNoFollow", uname);
167 LOG(log_debug, logtype_afpd, "sys_getextattr_content(%s): error: %s", attruname, strerror(errno));
172 /* remember where we must store length of attribute data in rbuf */
175 attrsize = htonl((uint32_t)ret);
176 memcpy(rbuf, &attrsize, 4);
182 * Function: sys_list_eas
184 * Purpose: copy names of native EAs into attrnamebuf
188 * vol (r) current volume
189 * attrnamebuf (w) store names a consecutive C strings here
190 * buflen (rw) length of names in attrnamebuf
192 * oflag (r) link and create flag
194 * Returns: AFP code: AFP_OK on success or appropiate AFP error code
198 * Copies names of all EAs of uname as consecutive C strings into rbuf.
199 * Increments *rbuflen accordingly.
200 * We hide the adouble:ea extended attributes here, but we currently
201 * allow reading, writing and deleteting them.
203 int sys_list_eas(VFS_FUNC_ARGS_EA_LIST)
205 ssize_t attrbuflen = *buflen;
210 buf = malloc(ATTRNAMEBUFSIZ);
214 if ((oflag & O_NOFOLLOW)) {
215 ret = sys_llistxattr(uname, buf, ATTRNAMEBUFSIZ);
218 ret = sys_listxattr(uname, buf, ATTRNAMEBUFSIZ);
221 if (ret == -1) switch(errno) {
222 case OPEN_NOFOLLOW_ERRNO:
223 /* its a symlink and client requested O_NOFOLLOW, we pretend 0 EAs */
224 LOG(log_debug, logtype_afpd, "sys_list_extattr(%s): symlink with kXAttrNoFollow", uname);
228 LOG(log_debug, logtype_afpd, "sys_list_extattr(%s): error opening atttribute dir: %s", uname, strerror(errno));
236 if (NOT_NETATALK_EA(ptr)) {
237 /* Convert name to CH_UTF8_MAC and directly store in in the reply buffer */
238 if ( 0 >= ( nlen = convert_string(vol->v_volcharset, CH_UTF8_MAC, ptr, len, attrnamebuf + attrbuflen, 256)) ) {
243 LOG(log_debug7, logtype_afpd, "sys_list_extattr(%s): attribute: %s", uname, ptr);
245 attrbuflen += nlen + 1;
246 if (attrbuflen > (ATTRNAMEBUFSIZ - 256)) {
247 /* Next EA name could overflow, so bail out with error.
248 FIXME: evantually malloc/memcpy/realloc whatever.
250 LOG(log_warning, logtype_afpd, "sys_list_extattr(%s): running out of buffer for EA names", uname);
263 *buflen = attrbuflen;
268 * Function: sys_set_ea
270 * Purpose: set a native EA
274 * vol (r) current volume
276 * attruname (r) EA name
277 * ibuf (r) buffer with EA content
278 * attrsize (r) length EA in ibuf
279 * oflag (r) link and create flag
281 * Returns: AFP code: AFP_OK on success or appropiate AFP error code
286 int sys_set_ea(VFS_FUNC_ARGS_EA_SET)
292 if ((oflag & O_CREAT) )
293 attr_flag |= XATTR_CREATE;
295 else if ((oflag & O_TRUNC) )
296 attr_flag |= XATTR_REPLACE;
298 if ((oflag & O_NOFOLLOW) ) {
299 ret = sys_lsetxattr(uname, attruname, ibuf, attrsize,attr_flag);
302 ret = sys_setxattr(uname, attruname, ibuf, attrsize, attr_flag);
307 case OPEN_NOFOLLOW_ERRNO:
308 /* its a symlink and client requested O_NOFOLLOW */
309 LOG(log_debug, logtype_afpd, "sys_set_ea(\"%s\", ea:'%s'): symlink with kXAttrNoFollow",
313 LOG(log_debug, logtype_afpd, "sys_set_ea(\"%s/%s\", ea:'%s'): EA already exists",
314 getcwdpath(), uname, attruname);
317 LOG(log_error, logtype_afpd, "sys_set_ea(\"%s/%s\", ea:'%s', size: %u, flags: %s|%s|%s): %s",
318 getcwdpath(), uname, attruname, attrsize,
319 oflag & O_CREAT ? "XATTR_CREATE" : "-",
320 oflag & O_TRUNC ? "XATTR_REPLACE" : "-",
321 oflag & O_NOFOLLOW ? "O_NOFOLLOW" : "-",
331 * Function: sys_remove_ea
333 * Purpose: remove a native EA
337 * vol (r) current volume
339 * attruname (r) EA name
340 * oflag (r) link and create flag
342 * Returns: AFP code: AFP_OK on success or appropiate AFP error code
346 * Removes EA attruname from file uname.
348 int sys_remove_ea(VFS_FUNC_ARGS_EA_REMOVE)
352 if ((oflag & O_NOFOLLOW) ) {
353 ret = sys_lremovexattr(uname, attruname);
356 ret = sys_removexattr(uname, attruname);
361 case OPEN_NOFOLLOW_ERRNO:
362 /* its a symlink and client requested O_NOFOLLOW */
363 LOG(log_debug, logtype_afpd, "sys_remove_ea(%s/%s): symlink with kXAttrNoFollow", uname);
366 LOG(log_debug, logtype_afpd, "sys_remove_ea(%s/%s): error: %s", uname, attruname, strerror(errno));
367 return AFPERR_ACCESS;
369 LOG(log_error, logtype_afpd, "sys_remove_ea(%s/%s): error: %s", uname, attruname, strerror(errno));
380 * @note Supports *at semantics, therfor switches back and forth between sfd and cwd
382 int sys_ea_copyfile(VFS_FUNC_ARGS_COPYFILE)
387 char *names = NULL, *end_names, *name, *value = NULL;
388 unsigned int setxattr_ENOTSUP = 0;
391 if ((cwd = open(".", O_RDONLY)) == -1) {
392 LOG(log_error, logtype_afpd, "sys_ea_copyfile: cant open cwd: %s",
400 if (fchdir(sfd) == -1) {
401 LOG(log_error, logtype_afpd, "sys_ea_copyfile: cant chdir to sfd: %s",
408 size = sys_listxattr(src, NULL, 0);
410 if (errno != ENOSYS && errno != ENOTSUP) {
415 names = malloc(size+1);
420 size = sys_listxattr(src, names, size);
426 end_names = names + size;
430 if (fchdir(cwd) == -1) {
431 LOG(log_error, logtype_afpd, "sys_ea_copyfile: cant chdir to cwd: %s",
438 for (name = names; name != end_names; name = strchr(name, '\0') + 1) {
441 /* check if this attribute shall be preserved */
446 if (fchdir(sfd) == -1) {
447 LOG(log_error, logtype_afpd, "sys_ea_copyfile: cant chdir to sfd: %s",
454 size = sys_getxattr (src, name, NULL, 0);
459 value = realloc(old_value = value, size);
460 if (size != 0 && value == NULL) {
464 size = sys_getxattr(src, name, value, size);
471 if (fchdir(cwd) == -1) {
472 LOG(log_error, logtype_afpd, "sys_ea_copyfile: cant chdir to cwd: %s",
479 if (sys_setxattr(dst, name, value, size, 0) != 0) {
480 if (errno == ENOTSUP)
483 if (errno == ENOSYS) {
485 /* no hope of getting any further */
493 if (setxattr_ENOTSUP) {
511 LOG(log_debug, logtype_afpd, "sys_ea_copyfile(%s, %s): error: %s", src, dst, strerror(errno));
512 return AFPERR_ACCESS;
514 LOG(log_error, logtype_afpd, "sys_ea_copyfile(%s, %s): error: %s", src, dst, strerror(errno));