2 * $Id: ofork.c,v 1.32 2010-03-12 15:16:49 franklahm 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) );
104 int of_rename(const struct vol *vol,
106 struct dir *olddir, const char *oldpath _U_,
107 struct dir *newdir, const char *newpath)
109 struct ofork *of, *next, *d_ofork;
115 next = ofork_table[hashfn(&s_of->key)];
116 while ((of = next)) {
117 next = next->next; /* so we can unhash and still be all right. */
119 if (vol == of->of_vol && olddir == of->of_dir &&
120 s_of->key.dev == of->key.dev &&
121 s_of->key.inode == of->key.inode ) {
123 strlcpy( of_name(of), newpath, of->of_ad->ad_m_namelen);
126 if (newdir != olddir) {
127 of->of_d_prev->of_d_next = of->of_d_next;
128 of->of_d_next->of_d_prev = of->of_d_prev;
129 if (of->of_dir->d_ofork == of) {
130 of->of_dir->d_ofork = (of == of->of_d_next) ? NULL : of->of_d_next;
133 if (!(d_ofork = newdir->d_ofork)) {
134 newdir->d_ofork = of;
135 of->of_d_next = of->of_d_prev = of;
137 of->of_d_next = d_ofork;
138 of->of_d_prev = d_ofork->of_d_prev;
139 of->of_d_prev->of_d_next = of;
140 d_ofork->of_d_prev = of;
149 #define min(a,b) ((a)<(b)?(a):(b))
152 of_alloc(struct vol *vol,
160 struct ofork *of, *d_ofork;
161 u_int16_t refnum, of_refnum;
166 nforks = getdtablesize() - 10;
167 /* protect against insane ulimit -n */
168 nforks = min(nforks, 0xffff);
169 oforks = (struct ofork **) calloc(nforks, sizeof(struct ofork *));
174 for ( refnum = ++lastrefnum, i = 0; i < nforks; i++, refnum++ ) {
175 /* cf AFP3.0.pdf, File fork page 40 */
178 if ( oforks[ refnum % nforks ] == NULL ) {
182 /* grr, Apple and their 'uniquely identifies'
183 the next line is a protection against
198 same if lastrefnum++ rather than ++lastrefnum.
202 LOG(log_error, logtype_afpd, "of_alloc: maximum number of forks exceeded.");
206 of_refnum = refnum % nforks;
207 if (( oforks[ of_refnum ] =
208 (struct ofork *)malloc( sizeof( struct ofork ))) == NULL ) {
209 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
212 of = oforks[of_refnum];
214 /* see if we need to allocate space for the adouble struct */
216 ad = malloc( sizeof( struct adouble ) );
218 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
220 oforks[ of_refnum ] = NULL;
224 /* initialize to zero. This is important to ensure that
225 ad_open really does reinitialize the structure. */
226 ad_init(ad, vol->v_adouble, vol->v_ad_options);
228 ad->ad_m_namelen = 255 +1;
229 /* here's the deal: we allocate enough for the standard mac file length.
230 * in the future, we'll reallocate in fairly large jumps in case
231 * of long unicode names */
232 if (( ad->ad_m_name =(char *)malloc( ad->ad_m_namelen )) == NULL ) {
233 LOG(log_error, logtype_afpd, "of_alloc: malloc: %s", strerror(errno) );
236 oforks[ of_refnum ] = NULL;
239 strlcpy( ad->ad_m_name, path, ad->ad_m_namelen);
241 /* Increase the refcount on this struct adouble. This is
242 decremented again in oforc_dealloc. */
250 if (!(d_ofork = dir->d_ofork)) {
252 of->of_d_next = of->of_d_prev = of;
254 of->of_d_next = d_ofork;
255 of->of_d_prev = d_ofork->of_d_prev;
256 d_ofork->of_d_prev->of_d_next = of;
257 d_ofork->of_d_prev = of;
261 of->of_refnum = refnum;
262 of->key.dev = st->st_dev;
263 of->key.inode = st->st_ino;
264 if (eid == ADEID_DFORK)
265 of->of_flags = AFPFORK_DATA;
267 of->of_flags = AFPFORK_RSRC;
273 struct ofork *of_find(const u_int16_t ofrefnum )
275 if (!oforks || !nforks)
278 return( oforks[ ofrefnum % nforks ] );
281 /* -------------------------- */
282 int of_stat (struct path *path)
287 if ((ret = lstat(path->u_name, &path->st)) < 0)
288 path->st_errno = errno;
293 int of_fstatat(int dirfd, struct path *path)
300 if ((ret = fstatat(dirfd, path->u_name, &path->st, AT_SYMLINK_NOFOLLOW)) < 0)
301 path->st_errno = errno;
305 #endif /* HAVE_RENAMEAT */
307 /* --------------------------
308 stat the current directory.
309 stat(".") works even if "." is deleted thus
310 we have to stat ../name because we want to know if it's there
312 int of_statdir (struct vol *vol, struct path *path)
314 static char pathname[ MAXPATHLEN + 1] = "../";
319 return of_stat (path);
323 /* FIXME, what about: we don't have r-x perm anymore ? */
324 strlcpy(pathname +3, path->d_dir->d_u_name, sizeof (pathname) -3);
326 if (!(ret = lstat(pathname, &path->st)))
329 path->st_errno = errno;
330 /* hmm, can't stat curdir anymore */
331 if (errno == EACCES && curdir->d_parent ) {
332 if (movecwd(vol, curdir->d_parent))
335 if ((ret = lstat(path->d_dir->d_u_name, &path->st)) < 0)
336 path->st_errno = errno;
341 /* -------------------------- */
342 struct ofork *of_findname(struct path *path)
347 if (!path->st_valid) {
354 key.dev = path->st.st_dev;
355 key.inode = path->st.st_ino;
357 for (of = ofork_table[hashfn(&key)]; of; of = of->next) {
358 if (key.dev == of->key.dev && key.inode == of->key.inode ) {
367 * @brief Search for open fork by dirfd/name
369 * Function call of_fstatat with dirfd and path and uses dev and ino
370 * to search the open fork table.
372 * @param dirfd (r) directory fd
373 * @param path (rw) pointer to struct path
376 struct ofork *of_findnameat(int dirfd, struct path *path)
381 if ( ! path->st_valid) {
382 of_fstatat(dirfd, path);
388 key.dev = path->st.st_dev;
389 key.inode = path->st.st_ino;
391 for (of = ofork_table[hashfn(&key)]; of; of = of->next) {
392 if (key.dev == of->key.dev && key.inode == of->key.inode ) {
401 void of_dealloc( struct ofork *of)
409 of->of_d_prev->of_d_next = of->of_d_next;
410 of->of_d_next->of_d_prev = of->of_d_prev;
411 if (of->of_dir->d_ofork == of) {
412 of->of_dir->d_ofork = (of == of->of_d_next) ? NULL : of->of_d_next;
415 oforks[ of->of_refnum % nforks ] = NULL;
417 /* decrease refcount */
418 of->of_ad->ad_refcount--;
420 if ( of->of_ad->ad_refcount <= 0) {
421 free( of->of_ad->ad_m_name );
423 } else {/* someone's still using it. just free this user's locks */
424 ad_unlock(of->of_ad, of->of_refnum);
430 /* --------------------------- */
431 int of_closefork(struct ofork *ofork)
434 int adflags, doflush = 0;
438 if ((ofork->of_flags & AFPFORK_DATA) && (ad_data_fileno( ofork->of_ad ) != -1)) {
439 adflags |= ADFLAGS_DF;
441 if ( (ofork->of_flags & AFPFORK_OPEN) && ad_reso_fileno( ofork->of_ad ) != -1 ) {
442 adflags |= ADFLAGS_HF;
444 * Only set the rfork's length if we're closing the rfork.
446 if ((ofork->of_flags & AFPFORK_RSRC)) {
447 ad_refresh( ofork->of_ad );
448 if ((ofork->of_flags & AFPFORK_DIRTY) && !gettimeofday(&tv, NULL)) {
449 ad_setdate(ofork->of_ad, AD_DATE_MODIFY | AD_DATE_UNIX,tv.tv_sec);
453 ad_flush( ofork->of_ad );
458 if ( ad_close( ofork->of_ad, adflags ) < 0 ) {
466 /* ----------------------
469 struct adouble *of_ad(const struct vol *vol, struct path *path, struct adouble *ad)
474 if ((of = of_findname(path))) {
477 ad_init(ad, vol->v_adouble, vol->v_ad_options);
483 /* ----------------------
484 close all forks for a volume
486 void of_closevol(const struct vol *vol)
493 for ( refnum = 0; refnum < nforks; refnum++ ) {
494 if (oforks[ refnum ] != NULL && oforks[refnum]->of_vol == vol) {
495 if (of_closefork( oforks[ refnum ]) < 0 ) {
496 LOG(log_error, logtype_afpd, "of_closevol: %s", strerror(errno) );