feat: fstat now handle symbolic link

[lunaix-os.git] / lunaix-os / kernel / fs / iso9660 / directory.c

diff --git a/lunaix-os/kernel/fs/iso9660/directory.c b/lunaix-os/kernel/fs/iso9660/directory.c
index d240e1fc60f4bb2a1707d0caa72ad9b76b03e96a..9f4d988f8c39606fd7f7e1160ecbff0bbfe433f5 100644 (file)
--- a/lunaix-os/kernel/fs/iso9660/directory.c
+++ b/lunaix-os/kernel/fs/iso9660/directory.c
@@ -1,4 +1,3 @@
-#include <lunaix/dirent.h>
 #include <lunaix/fs.h>
 #include <lunaix/fs/iso9660.h>
 #include <lunaix/mm/cake.h>
@@ -7,10 +6,14 @@
 
 #include <klibc/string.h>
 
+#include <usr/lunaix/dirent_defs.h>
+
 extern struct cake_pile* drec_cache_pile;
 
 void
-iso9660_fill_drecache(struct iso_drecache* cache, struct iso_drecord* drec)
+iso9660_fill_drecache(struct iso_drecache* cache,
+                      struct iso_drecord* drec,
+                      u32_t drec_len)
 {
     *cache = (struct iso_drecache){ .data_size = drec->data_size.le,
                                     .extent_addr = drec->extent_addr.le,
@@ -18,38 +21,75 @@ iso9660_fill_drecache(struct iso_drecache* cache, struct iso_drecord* drec)
                                     .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);
+    u32_t padding = ((drec->name.len + sizeof(drec->name)) % 2) != 0;
+    u32_t su_offset = drec->name.len + sizeof(struct iso_drecord) + padding;
+    int su_len = drec_len - su_offset - 2, i = 0;
+
+    while (i < su_len) {
+        struct isosu_base* su_entry =
+          (struct isosu_base*)((void*)drec + su_offset + i);
+        switch (su_entry->signature) {
+            case ISORR_NM:
+                i += isorr_parse_nm(cache, (void*)su_entry);
+                break;
+            case ISORR_PX:
+                i += isorr_parse_px(cache, (void*)su_entry);
+                break;
+            case ISORR_TF:
+                i += isorr_parse_tf(cache, (void*)su_entry);
+                break;
+            case ISOSU_ST:
+                goto done;
+            default:
+                i += su_entry->length;
+                break;
+        }
+    }
+
+done:
+    if (!cache->name.len) {
+        // Load ISO9660 file id if no NM found.
+        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 - 1);
+
+        strncpy(cache->name_val, (const char*)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;
+    if ((inode->itype & F_FILE)) {
+        vfs_assign_inode(dnode, inode);
+        return 0;
+    }
+
+    struct iso_inode* isoino = inode->data;
+    if (!llist_empty(&isoino->drecaches)) {
+        dnode->data = &isoino->drecaches;
+        vfs_assign_inode(dnode, inode);
+        return 0;
     }
 
     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);
+            errno =
+              dev->ops.read(dev, records, blk + current_pos, ISO9660_BLKSZ);
             if (errno < 0) {
                 errno = EIO;
                 goto done;
@@ -71,14 +111,13 @@ iso9660_setup_dnode(struct v_dnode* dnode, struct v_inode* inode)
 
         struct iso_drecache* cache = cake_grab(drec_cache_pile);
 
-        iso9660_fill_drecache(cache, drec);
-        llist_append(lead, &cache->caches);
+        iso9660_fill_drecache(cache, drec, mdu->len);
+        llist_append(&isoino->drecaches, &cache->caches);
     cont:
         blk_offset += mdu->len;
     } while (current_pos + blk_offset < max_pos);
 
-    dnode->data = lead;
-    isoino->drecaches = lead;
+    dnode->data = &isoino->drecaches;
 
     vfs_assign_inode(dnode, inode);
 
@@ -93,10 +132,9 @@ 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)
+    llist_for_each(pos, n, &isoino->drecaches, caches)
     {
         if (HSTR_EQ(&dnode->name, &pos->name)) {
             goto found;
@@ -113,9 +151,7 @@ found:
         vfs_i_addhash(inode);
     }
 
-    iso9660_setup_dnode(dnode, inode);
-
-    return 0;
+    return iso9660_setup_dnode(dnode, inode);
 }
 
 static int