Changeset e32b65a in mainline

Timestamp:

2008-12-16T17:18:29Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

699743c

Parents:

f0c9aff

Message:

Add the ability to grow a FAT directory.

File:

• uspace/srv/fs/fat/fat_ops.c (modified) (3 diffs)

uspace/srv/fs/fat/fat_ops.c

@@ -390 +390 @@
         unsigned dps;
         unsigned blocks;
+        fat_cluster_t mcl, lcl;
+        int rc;
 
         futex_down(&childp->lock);
@@ -442 +444 @@
          * We need to grow the parent in order to create a new unused dentry.
          */
-        futex_up(&parentp->idx->lock);
-        return ENOTSUP; /* XXX */
+        if (parentp->idx->pfc == FAT_CLST_ROOT) {
+                /* Can't grow the root directory. */
+                futex_up(&parentp->idx->lock);
+                return ENOSPC;
+        }
+        rc = fat_alloc_clusters(bs, parentp->idx->dev_handle, 1, &mcl, &lcl);
+        if (rc != EOK) {
+                futex_up(&parentp->idx->lock);
+                return rc;
+        }
+        fat_append_clusters(bs, parentp, mcl);
+        b = fat_block_get(bs, parentp, i, BLOCK_FLAGS_NOREAD);
+        d = (fat_dentry_t *)b->data;
+        /*
+         * Clear all dentries in the block except for the first one (the first
+         * dentry will be cleared in the next step).
+         */
+        memset(d + 1, 0, bps - sizeof(fat_dentry_t));
 
 hit:
@@ -449 +467 @@
          * At this point we only establish the link between the parent and the
          * child.  The dentry, except of the name and the extension, will remain
-         * uninitialized until the the corresponding node is synced. Thus the
-         * valid dentry data is kept in the child node structure.
+         * uninitialized until the corresponding node is synced. Thus the valid
+         * dentry data is kept in the child node structure.
          */
         memset(d, 0, sizeof(fat_dentry_t));