file_systems/fs_shell/rootfs.c

49     nspace      *ns;
70 static int      rootfs_read_vnode(void *ns, vnode_id vnid, char r,
72 static int      rootfs_write_vnode(void *ns, void *node, char r);
73 static int      rootfs_remove_vnode(void *ns, void *node, char r);
74 static int      rootfs_walk(void *ns, void *base, const char *file,
76 static int      rootfs_access(void *ns, void *node, int mode);
77 static int      rootfs_symlink(void *ns, void *dir, const char *name,
79 static int      rootfs_mkdir(void *ns, void *dir, const char *name,
81 static int      rootfs_rename(void *ns, void *olddir, const char *oldname,
83 static int      rootfs_unlink(void *ns, void *dir, const char *name);
84 static int      rootfs_rmdir(void *ns, void *dir, const char *name);
85 static int      rootfs_readlink(void *ns, void *node, char *buf,
87 static int      rootfs_opendir(void *ns, void *node, void **cookie);
88 static int      rootfs_closedir(void *ns, void *node, void *cookie);
89 static int      rootfs_free_dircookie(void *ns, void *node, void *cookie);
90 static int      rootfs_rewinddir(void *ns, void *node, void *cookie);
91 static int      rootfs_readdir(void *ns, void *node, void *cookie,
93 static int      rootfs_rstat(void *ns, void *node, struct my_stat *st);
94 static int      rootfs_wstat(void *ns, void *node, struct my_stat *st, long mask);
97 static int      rootfs_unmount(void *ns);
100 static int      do_create(nspace *ns, vnode *dir, const char *name,
102 static int      do_unlink(nspace *ns, vnode *dir, const char *name, bool isdir);
156     nspace      *ns;
162     ns = (nspace *) _ns;
165     LOCK(ns->lock);
185         err = get_vnode(ns->nsid, base->vnid, (void *)&vn);
196         err = get_vnode(ns->nsid, base->parent->vnid, (void *)&vn);
245         err = get_vnode(ns->nsid, vn->vnid, (void *)&vn);
251     UNLOCK(ns->lock);
259     nspace      *ns;
264     ns = (nspace *) _ns;
267     LOCK(ns->lock);
268     err = do_create(ns, dir, name, (perms & ~MY_S_IFMT) | MY_S_IFDIR, &vn);
269     UNLOCK(ns->lock);
276     nspace      *ns;
282     ns = (nspace *) _ns;
291     LOCK(ns->lock);
292     err = do_create(ns, dir, name, MY_S_IFLNK, &vn);
296     UNLOCK(ns->lock);
300     UNLOCK(ns->lock);
310     nspace      *ns;
316     ns = (nspace *) _ns;
320     LOCK(ns->lock);
374     while (avn != ns->root) {
401         if (nvn == nvn->ns->root) {
410         err = get_vnode(ns->nsid, nvn->vnid, (void *)&nvn);
414         err = remove_vnode(ns->nsid, nvn->vnid);
426         put_vnode(ns->nsid, nvn->vnid);
457     UNLOCK(ns->lock);
461     UNLOCK(ns->lock);
468     nspace      *ns;
471     ns = (nspace *) _ns;
474     return do_unlink(ns, dir, name, FALSE);
480     nspace      *ns;
483     ns = (nspace *) _ns;
486     return do_unlink(ns, dir, name, TRUE);
494     nspace      *ns;
498     ns = (nspace *) _ns;
501         LOCK(ns->lock);
503     fakevn.ns = ns;
504     vn = SearchSL(ns->skiplist, &fakevn);
508         UNLOCK(ns->lock);
521     nspace      *ns;
524     ns = (nspace *) _ns;
528         LOCK(ns->lock);
529     DeleteSL(ns->skiplist, node);
531         UNLOCK(ns->lock);
533     atomic_add(&ns->vnnum, -1);
545     nspace      *ns;
550     ns = (nspace *) _ns;
572     nspace      *ns;
577     ns = (nspace *) _ns;
613     nspace      *ns;
617     ns = (nspace *) _ns;
629     nspace      *ns;
633     ns = (nspace *) _ns;
648     nspace              *ns;
659     ns = (nspace *) _ns;
663     LOCK(ns->lock);
703     UNLOCK(ns->lock);
710     nspace      *ns;
713     ns = (nspace *) _ns;
716     LOCK(ns->lock);
717     st->dev = ns->nsid;
726     UNLOCK(ns->lock);
733     nspace      *ns;
736     ns = (nspace *) _ns;
742     LOCK(ns->lock);
755     UNLOCK(ns->lock);
764     nspace          *ns;
773     ns = (nspace *) malloc(sizeof(nspace));
774     if (!ns) {
787     ns->nsid = nsid;
788     ns->vnnum = 0;
789     ns->nxvnid = rvnid;
790     ns->root = root;
791     if (new_lock(&ns->lock, "rootfs") < 0) {
795     ns->skiplist = NewSL(&compare_vnode, NULL, NO_DUPLICATES);
796     if (!ns->skiplist) {
803     root->ns = ns;
820     *data = ns;
826     FreeSL(ns->skiplist);
828     free_lock(&ns->lock);
832     free(ns);
840     nspace      *ns;
843     ns = (nspace *) _ns;
845     vn = ns->root;
850         if (vn == ns->root)
859         rootfs_remove_vnode(ns, avn, TRUE);
861     free(ns->root);
862     free_lock(&ns->lock);
863     FreeSL(ns->skiplist);
864     free(ns);
888 do_create(nspace *ns, vnode *dir, const char *name, mode_t mode, vnode **vnp)
959     vnid = ++ns->nxvnid;
963     vn->ns = ns;
990     atomic_add(&ns->vnnum, 1);
992     InsertSL(ns->skiplist, vn);
1008 do_unlink(nspace *ns, vnode *dir, const char *name, bool isdir)
1013     LOCK(ns->lock);
1066     if (vn == vn->ns->root) {
1080     err = get_vnode(ns->nsid, vn->vnid, (void *)&vn);
1084     err = remove_vnode(ns->nsid, vn->vnid);
1098     put_vnode(ns->nsid, vn->vnid);
1100     UNLOCK(ns->lock);
1105     UNLOCK(ns->lock);