#include <stdio.h>
#include <stdint.h>
+#include <inttypes.h>
#include <glib.h>
#include <string.h>
/* Update an inode to indicate that a modification was made. This increases
* the change counter, updates the ctime to the current time, and optionally
- * updates the mtime. */
+ * updates the mtime. inode must already be locked. */
void bluesky_inode_update_ctime(BlueSkyInode *inode, gboolean update_mtime)
{
int64_t now = bluesky_get_current_time();
void bluesky_inode_unref(BlueSkyInode *inode)
{
if (g_atomic_int_dec_and_test(&inode->refcount)) {
- g_error("Reference count for inode %lld dropped to zero!\n",
+ g_error("Reference count for inode %"PRIu64" dropped to zero!\n",
inode->inum);
}
}
/* Allocate a fresh inode number which has not been used before within a
- * filesystem. */
+ * filesystem. fs must already be locked. */
uint64_t bluesky_fs_alloc_inode(BlueSkyFS *fs)
{
uint64_t inum;
- g_mutex_lock(fs->lock);
inum = fs->next_inum;
fs->next_inum++;
- g_mutex_unlock(fs->lock);
return inum;
}
case BLUESKY_DIRECTORY:
i->dirents = g_sequence_new(bluesky_dirent_destroy);
i->dirhash = g_hash_table_new(g_str_hash, g_str_equal);
+ i->dirhash_folded = g_hash_table_new(g_str_hash, g_str_equal);
break;
case BLUESKY_BLOCK:
case BLUESKY_CHARACTER:
/* Retrieve an inode from the filesystem. Eventually this will be a cache and
* so we might need to go fetch the inode from elsewhere; for now all
- * filesystem state is stored here. */
+ * filesystem state is stored here. inode is returned locked with a reference
+ * held. */
BlueSkyInode *bluesky_get_inode(BlueSkyFS *fs, uint64_t inum)
{
BlueSkyInode *inode = NULL;
g_mutex_lock(fs->lock);
inode = (BlueSkyInode *)g_hash_table_lookup(fs->inodes, &inum);
+
+ if (inode == NULL) {
+ bluesky_inode_fetch(fs, inum);
+ inode = (BlueSkyInode *)g_hash_table_lookup(fs->inodes, &inum);
+ }
+
+ if (inode != NULL) {
+ bluesky_inode_ref(inode);
+ }
+
g_mutex_unlock(fs->lock);
return inode;
}
-/* Insert an inode into the filesystem inode cache. */
+/* Insert an inode into the filesystem inode cache. fs should be locked. */
void bluesky_insert_inode(BlueSkyFS *fs, BlueSkyInode *inode)
{
- g_mutex_lock(fs->lock);
g_hash_table_insert(fs->inodes, &inode->inum, inode);
- g_mutex_unlock(fs->lock);
}
/* Synchronize an inode to stable storage. */
BlueSkyRCStr *data = bluesky_string_new(g_string_free(buf, FALSE), len);
char key[64];
- sprintf(key, "inode-%016llx", inode->inum);
+ sprintf(key, "inode-%016"PRIx64, inode->inum);
bluesky_store_put(fs->store, key, data);
}
+
+/* Fetch an inode from stable storage. */
+void bluesky_inode_fetch(BlueSkyFS *fs, uint64_t inum)
+{
+ char key[64];
+ sprintf(key, "inode-%016"PRIx64, inum);
+ BlueSkyRCStr *data = bluesky_store_get(fs->store, key);
+ if (data == NULL)
+ return;
+
+ BlueSkyInode *inode = bluesky_deserialize_inode(fs, data->data);
+ if (inode != NULL) {
+ bluesky_insert_inode(fs, inode);
+ g_print("Loaded inode %"PRIu64"\n", inum);
+ }
+}