+#include <lunaix/dirent.h>
+#include <lunaix/fs.h>
+#include <lunaix/fs/iso9660.h>
+#include <lunaix/mm/cake.h>
+#include <lunaix/mm/valloc.h>
+#include <lunaix/spike.h>
+
+#include <klibc/string.h>
+
+extern struct cake_pile* drec_cache_pile;
+
+void
+iso9660_fill_drecache(struct iso_drecache* cache, struct iso_drecord* drec)
+{
+ *cache = (struct iso_drecache){ .data_size = drec->data_size.le,
+ .extent_addr = drec->extent_addr.le,
+ .flags = drec->flags,
+ .fu_size = drec->fu_sz ? drec->fu_sz : 1,
+ .gap_size = drec->gap_sz,
+ .xattr_len = drec->xattr_len };
+ u32_t l = drec->name.len;
+ while (l < (u32_t)-1 && drec->name.content[l--] != ';')
+ ;
+ l = (l + 1) ? l : drec->name.len;
+ l = MIN(l, ISO9660_IDLEN);
+ strncpy(cache->name_val, drec->name.content, l);
+ cache->name = HSTR(cache->name_val, l);
+ hstr_rehash(&cache->name, HSTR_FULL_HASH);
+}
+
+int
+iso9660_setup_dnode(struct v_dnode* dnode, struct v_inode* inode)
+{
+ if (!(inode->itype & VFS_IFDIR)) {
+ return;
+ }
+
+ int errno = 0;
+ struct device* dev = dnode->super_block->dev;
+ struct iso_inode* isoino = inode->data;
+ struct llist_header* lead = valloc(sizeof(*lead));
+ void* records = valloc(ISO9660_BLKSZ);
+ u32_t current_pos = -ISO9660_BLKSZ, max_pos = inode->fsize,
+ blk = inode->lb_addr * ISO9660_BLKSZ, blk_offset = (u32_t)-1;
+
+ llist_init_head(lead);
+
+ // As per 6.8.1, Directory structure shall NOT recorded in interleave mode.
+ do {
+ if (blk_offset >= ISO9660_BLKSZ - sizeof(struct iso_drecord)) {
+ current_pos += ISO9660_BLKSZ;
+ errno = dev->read(dev, records, blk + current_pos, ISO9660_BLKSZ);
+ if (errno < 0) {
+ errno = EIO;
+ goto done;
+ }
+ blk_offset = 0;
+ }
+
+ struct iso_drecord* drec;
+ struct iso_var_mdu* mdu = (struct iso_var_mdu*)(records + blk_offset);
+
+ if (!(drec = iso9660_get_drecord(mdu))) {
+ break;
+ }
+
+ // ignore the '.', '..' as we have built-in support
+ if (drec->name.len == 1) {
+ goto cont;
+ }
+
+ struct iso_drecache* cache = cake_grab(drec_cache_pile);
+
+ iso9660_fill_drecache(cache, drec);
+ llist_append(lead, &cache->caches);
+ cont:
+ blk_offset += mdu->len;
+ } while (current_pos + blk_offset < max_pos);
+
+ dnode->data = lead;
+ isoino->drecaches = lead;
+
+ vfs_assign_inode(dnode, inode);
+
+ errno = 0;
+
+done:
+ vfree(records);
+ return errno;
+}
+
+int
+iso9660_dir_lookup(struct v_inode* this, struct v_dnode* dnode)
+{
+ struct iso_inode* isoino = this->data;
+ struct llist_header* lead = isoino->drecaches;
+ struct iso_drecache *pos, *n;
+
+ llist_for_each(pos, n, lead, caches)
+ {
+ if (HSTR_EQ(&dnode->name, &pos->name)) {
+ goto found;
+ }
+ }
+
+ return ENOENT;
+found:
+ struct v_inode* inode = vfs_i_find(dnode->super_block, pos->extent_addr);
+
+ if (!inode) {
+ inode = vfs_i_alloc(dnode->super_block);
+ iso9660_fill_inode(inode, pos, pos->extent_addr);
+ vfs_i_addhash(inode);
+ }
+
+ iso9660_setup_dnode(dnode, inode);
+
+ return 0;
+}
+
+static int
+__get_dtype(struct iso_drecache* pos)
+{
+ if ((pos->flags & ISO_FDIR)) {
+ return DT_DIR;
+ } else {
+ return DT_FILE;
+ }
+}
+
+int
+iso9660_readdir(struct v_file* file, struct dir_context* dctx)
+{
+ struct llist_header* lead = file->dnode->data;
+ struct iso_drecache *pos, *n;
+ u32_t counter = dctx->index - 1;
+
+ llist_for_each(pos, n, lead, caches)
+ {
+ if (counter == (u32_t)-1 && !(pos->flags & ISO_FHIDDEN)) {
+ dctx->read_complete_callback(
+ dctx, pos->name_val, pos->name.len, __get_dtype(pos));
+ return 1;
+ }
+ counter--;
+ }
+ return 0;
+}
\ No newline at end of file
git://scm.lunaixsky.com / lunaix-os.git / commitdiff