2 * $Id: ofork.c,v 1.28 2009-10-13 22:55:37 didg Exp $
4 * Copyright (c) 1996 Regents of The University of Michigan.
5 * All Rights Reserved. See COPYRIGHT.
10 #endif /* HAVE_CONFIG_H */
18 #include <sys/stat.h> /* works around a bug */
19 #include <sys/param.h>
20 #include <atalk/logger.h>
23 #include <atalk/util.h>
27 #include "directory.h"
30 /* we need to have a hashed list of oforks (by dev inode). just hash
32 #define OFORK_HASHSIZE 64
33 static struct ofork *ofork_table[OFORK_HASHSIZE];
35 static struct ofork **oforks = NULL;
36 static int nforks = 0;
37 static u_short lastrefnum = 0;
40 /* OR some of each character for the hash*/
41 static unsigned long hashfn(const struct file_key *key)
46 i = ((i << 4) | (8*sizeof(i) - 4)) ^ *name++;
49 return key->inode & (OFORK_HASHSIZE - 1);
52 static void of_hash(struct ofork *of)
56 table = &ofork_table[hashfn(&of->key)];
57 if ((of->next = *table) != NULL)
58 (*table)->prevp = &of->next;
63 static void of_unhash(struct ofork *of)
67 of->next->prevp = of->prevp;
68 *(of->prevp) = of->next;
73 void of_pforkdesc( FILE *f)
80 for ( ofrefnum = 0; ofrefnum < nforks; ofrefnum++ ) {
81 if ( oforks[ ofrefnum ] != NULL ) {
82 fprintf( f, "%hu <%s>\n", ofrefnum, of_name(oforks[ ofrefnum ]));
88 int of_flush(const struct vol *vol)
95 for ( refnum = 0; refnum < nforks; refnum++ ) {
96 if (oforks[ refnum ] != NULL && (oforks[refnum]->of_vol == vol) &&
97 flushfork( oforks[ refnum ] ) < 0 ) {
98 LOG(log_error, logtype_afpd, "of_flush: %s", strerror(errno) );
105 const struct vol *vol,
107 struct dir *olddir, const char *oldpath _U_,
108 struct dir *newdir, const char *newpath)
110 struct ofork *of, *next, *d_ofork;
116 next = ofork_table[hashfn(&s_of->key)];
117 while ((of = next)) {
118 next = next->next; /* so we can unhash and still be all right. */
120 if (vol == of->of_vol && olddir == of->of_dir &&
121 s_of->key.dev == of->key.dev &&
122 s_of->key.inode == of->key.inode ) {
124 strlcpy( of_name(of), newpath, of->of_ad->ad_m_namelen);
127 if (newdir != olddir) {
128 of->of_d_prev->of_d_next = of->of_d_next;
129 of->of_d_next->of_d_prev = of->of_d_prev;
130 if (of->of_dir->d_ofork == of) {
131 of->of_dir->d_ofork = (of == of->of_d_next) ? NULL : of->of_d_next;
134 if (!(d_ofork = newdir->d_ofork)) {
135 newdir->d_ofork = of;
136 of->of_d_next = of->of_d_prev = of;
138 of->of_d_next = d_ofork;
139 of->of_d_prev = d_ofork->of_d_prev;
140 of->of_d_prev->of_d_next = of;
141 d_ofork->of_d_prev = of;
150 #define min(a,b) ((a)<(b)?(a):(b))
153 of_alloc(struct vol *vol,
161 struct ofork *of, *d_ofork;
162 u_int16_t refnum, of_refnum;
167 nforks = getdtablesize() - 10;
168 /* protect against insane ulimit -n */
169 nforks = min(nforks, 0xffff);
170 oforks = (struct ofork **) calloc(nforks, sizeof(struct ofork *));
175 for ( refnum = ++lastrefnum, i = 0; i < nforks; i++, refnum++ ) {
176 /* cf AFP3.0.pdf, File fork page 40 */
179 if ( oforks[ refnum % nforks ] == NULL ) {
183 /* grr, Apple and their 'uniquely identifies'
184 the next line is a protection against
199 same if lastrefnum++ rather than ++lastrefnum.
203 LOG(log_error, logtype_afpd, "of_alloc: maximum number of forks exceeded.");
207 of_refnum = refnum % nforks;
208 if (( oforks[ of_refnum ] =
209 (struct ofork *)malloc( sizeof( struct ofork ))) == NULL ) {
210 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
213 of = oforks[of_refnum];
215 /* see if we need to allocate space for the adouble struct */
217 ad = malloc( sizeof( struct adouble ) );
219 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
221 oforks[ of_refnum ] = NULL;
225 /* initialize to zero. This is important to ensure that
226 ad_open really does reinitialize the structure. */
227 ad_init(ad, vol->v_adouble, vol->v_ad_options);
229 ad->ad_m_namelen = 255 +1;
230 /* here's the deal: we allocate enough for the standard mac file length.
231 * in the future, we'll reallocate in fairly large jumps in case
232 * of long unicode names */
233 if (( ad->ad_m_name =(char *)malloc( ad->ad_m_namelen )) == NULL ) {
234 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
237 oforks[ of_refnum ] = NULL;
240 strlcpy( ad->ad_m_name, path, ad->ad_m_namelen);
242 /* Increase the refcount on this struct adouble. This is
243 decremented again in oforc_dealloc. */
251 if (!(d_ofork = dir->d_ofork)) {
253 of->of_d_next = of->of_d_prev = of;
255 of->of_d_next = d_ofork;
256 of->of_d_prev = d_ofork->of_d_prev;
257 d_ofork->of_d_prev->of_d_next = of;
258 d_ofork->of_d_prev = of;
262 of->of_refnum = refnum;
263 of->key.dev = st->st_dev;
264 of->key.inode = st->st_ino;
265 if (eid == ADEID_DFORK)
266 of->of_flags = AFPFORK_DATA;
268 of->of_flags = AFPFORK_RSRC;
274 struct ofork *of_find(const u_int16_t ofrefnum )
276 if (!oforks || !nforks)
279 return( oforks[ ofrefnum % nforks ] );
282 /* -------------------------- */
283 int of_stat (struct path *path)
288 if ((ret = stat(path->u_name, &path->st)) < 0)
289 path->st_errno = errno;
293 /* -------------------------- */
294 int of_statdir (const struct vol *vol, struct path *path)
296 static char pathname[ MAXPATHLEN + 1];
301 return of_stat (path);
305 /* FIXME, what about: we don't have r-x perm anymore ? */
306 strcpy(pathname, "../");
307 strlcat(pathname, path->d_dir->d_u_name, MAXPATHLEN);
309 if (!(ret = stat(pathname, &path->st)))
312 path->st_errno = errno;
313 /* hmm, can't stat curdir anymore */
314 if (errno == EACCES && curdir->d_parent ) {
315 if (movecwd(vol, curdir->d_parent))
318 if ((ret = stat(path->d_dir->d_u_name, &path->st)) < 0)
319 path->st_errno = errno;
324 /* -------------------------- */
326 of_findname(struct path *path)
331 if (!path->st_valid) {
338 key.dev = path->st.st_dev;
339 key.inode = path->st.st_ino;
341 for (of = ofork_table[hashfn(&key)]; of; of = of->next) {
342 if (key.dev == of->key.dev && key.inode == of->key.inode ) {
350 void of_dealloc( struct ofork *of)
358 of->of_d_prev->of_d_next = of->of_d_next;
359 of->of_d_next->of_d_prev = of->of_d_prev;
360 if (of->of_dir->d_ofork == of) {
361 of->of_dir->d_ofork = (of == of->of_d_next) ? NULL : of->of_d_next;
364 oforks[ of->of_refnum % nforks ] = NULL;
366 /* decrease refcount */
367 of->of_ad->ad_refcount--;
369 if ( of->of_ad->ad_refcount <= 0) {
370 free( of->of_ad->ad_m_name );
372 } else {/* someone's still using it. just free this user's locks */
373 ad_unlock(of->of_ad, of->of_refnum);
379 /* --------------------------- */
380 int of_closefork(struct ofork *ofork)
383 int adflags, doflush = 0;
387 if ((ofork->of_flags & AFPFORK_DATA) && (ad_data_fileno( ofork->of_ad ) != -1)) {
388 adflags |= ADFLAGS_DF;
390 if ( (ofork->of_flags & AFPFORK_OPEN) && ad_reso_fileno( ofork->of_ad ) != -1 ) {
391 adflags |= ADFLAGS_HF;
393 * Only set the rfork's length if we're closing the rfork.
395 if ((ofork->of_flags & AFPFORK_RSRC)) {
396 ad_refresh( ofork->of_ad );
397 if ((ofork->of_flags & AFPFORK_DIRTY) && !gettimeofday(&tv, NULL)) {
398 ad_setdate(ofork->of_ad, AD_DATE_MODIFY | AD_DATE_UNIX,tv.tv_sec);
402 ad_flush( ofork->of_ad );
407 if ( ad_close( ofork->of_ad, adflags ) < 0 ) {
415 /* ----------------------
418 struct adouble *of_ad(const struct vol *vol, struct path *path, struct adouble *ad)
423 if ((of = of_findname(path))) {
426 ad_init(ad, vol->v_adouble, vol->v_ad_options);
432 /* ----------------------
433 close all forks for a volume
435 void of_closevol(const struct vol *vol)
442 for ( refnum = 0; refnum < nforks; refnum++ ) {
443 if (oforks[ refnum ] != NULL && oforks[refnum]->of_vol == vol) {
444 if (of_closefork( oforks[ refnum ]) < 0 ) {
445 LOG(log_error, logtype_afpd, "of_closevol: %s", strerror(errno) );