Changeset 395df52 in mainline for uspace/srv/fs/cdfs/cdfs_ops.c

Timestamp:

2017-05-12T19:58:27Z (7 years ago)

Author:

Jiri Svoboda <jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

e48947e

Parents:

de5b708

Message:

Probing for ExFAT, Ext4 and CDFS.

File:

• uspace/srv/fs/cdfs/cdfs_ops.c (modified) (4 diffs)

uspace/srv/fs/cdfs/cdfs_ops.c

@@ -906 +906 @@
 }
 
-static bool iso_readfs(cdfs_t *fs, fs_node_t *rfn,
-    cdfs_lba_t altroot)
+/** Read the volume descriptors. */
+static bool iso_read_vol_desc(service_id_t sid, cdfs_lba_t altroot,
+    uint32_t *rlba, uint32_t *rsize, cdfs_enc_t *enc)
 {
         /* First 16 blocks of isofs are empty */
         block_t *block;
-        int rc = block_get(&block, fs->service_id, altroot + 16, BLOCK_FLAGS_NONE);
+        int rc = block_get(&block, sid, altroot + 16, BLOCK_FLAGS_NONE);
         if (rc != EOK)
                 return false;
@@ -956 +957 @@
         // TODO: implement path table support
         
-        cdfs_node_t *node = CDFS_NODE(rfn);
-        
         /* Search for Joliet SVD */
         
@@ -963 +962 @@
         uint32_t jrsize;
         
-        rc = cdfs_find_joliet_svd(fs->service_id, altroot, &jrlba, &jrsize);
+        rc = cdfs_find_joliet_svd(sid, altroot, &jrlba, &jrsize);
         if (rc == EOK) {
                 /* Found */
-                node->lba = jrlba;
-                node->size = jrsize;
-                fs->enc = enc_ucs2;
+                *rlba = jrlba;
+                *rsize = jrsize;
+                *enc = enc_ucs2;
         } else {
-                node->lba = uint32_lb(vol_desc->data.prisec.root_dir.lba);
-                node->size = uint32_lb(vol_desc->data.prisec.root_dir.size);
-                fs->enc = enc_ascii;
-        }
-        
-        if (!cdfs_readdir(fs, rfn)) {
-                block_put(block);
-                return false;
+                *rlba = uint32_lb(vol_desc->data.prisec.root_dir.lba);
+                *rsize = uint32_lb(vol_desc->data.prisec.root_dir.size);
+                *enc = enc_ascii;
         }
         
         block_put(block);
         return true;
+}
+
+static bool iso_readfs(cdfs_t *fs, fs_node_t *rfn,
+    cdfs_lba_t altroot)
+{
+        int rc;
+        
+        cdfs_node_t *node = CDFS_NODE(rfn);
+        
+        rc = iso_read_vol_desc(fs->service_id, altroot, &node->lba,
+            &node->size, &fs->enc);
+        if (rc != EOK)
+                return false;
+        
+        return cdfs_readdir(fs, rfn);
 }
 
@@ -1023 +1032 @@
 static int cdfs_fsprobe(service_id_t service_id, vfs_fs_probe_info_t *info)
 {
-        return ENOTSUP;
+        /* Initialize the block layer */
+        int rc = block_init(service_id, BLOCK_SIZE);
+        if (rc != EOK)
+                return rc;
+        
+        cdfs_lba_t altroot = 0;
+        
+        /*
+         * Read TOC multisession information and get the start address
+         * of the first track in the last session
+         */
+        scsi_toc_multisess_data_t toc;
+
+        rc = block_read_toc(service_id, 1, &toc, sizeof(toc));
+        if (rc == EOK && (uint16_t_be2host(toc.toc_len) == 10))
+                altroot = uint32_t_be2host(toc.ftrack_lsess.start_addr);
+        
+        /* Initialize the block cache */
+        rc = block_cache_init(service_id, BLOCK_SIZE, 0, CACHE_MODE_WT);
+        if (rc != EOK) {
+                block_fini(service_id);
+                return rc;
+        }
+        
+        /* Check if this device is not already mounted */
+        fs_node_t *rootfn;
+        rc = cdfs_root_get(&rootfn, service_id);
+        if ((rc == EOK) && (rootfn)) {
+                cdfs_node_put(rootfn);
+                block_cache_fini(service_id);
+                block_fini(service_id);
+                return EOK;
+        }
+        
+        /* Read volume descriptors */
+        uint32_t rlba;
+        uint32_t rsize;
+        cdfs_enc_t enc;
+        if (!iso_read_vol_desc(service_id, altroot, &rlba, &rsize, &enc)) {
+                block_cache_fini(service_id);
+                block_fini(service_id);
+                return EIO;
+        }
+        
+        return EOK;
 }