qed: Table, L2 cache, and cluster functions
This patch adds code to look up data cluster offsets in the image via
the L1/L2 tables. The L2 tables are writethrough cached in memory for
performance (each read/write requires a lookup so it is essential to
cache the tables).
With cluster lookup code in place it is possible to implement
bdrv_is_allocated() to query the number of contiguous
allocated/unallocated clusters.
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
diff --git a/trace-events b/trace-events
index da03d4b..59f97a2 100644
--- a/trace-events
+++ b/trace-events
@@ -192,3 +192,14 @@
# vl.c
disable vm_state_notify(int running, int reason) "running %d reason %d"
+
+# block/qed-l2-cache.c
+disable qed_alloc_l2_cache_entry(void *l2_cache, void *entry) "l2_cache %p entry %p"
+disable qed_unref_l2_cache_entry(void *entry, int ref) "entry %p ref %d"
+disable qed_find_l2_cache_entry(void *l2_cache, void *entry, uint64_t offset, int ref) "l2_cache %p entry %p offset %"PRIu64" ref %d"
+
+# block/qed-table.c
+disable qed_read_table(void *s, uint64_t offset, void *table) "s %p offset %"PRIu64" table %p"
+disable qed_read_table_cb(void *s, void *table, int ret) "s %p table %p ret %d"
+disable qed_write_table(void *s, uint64_t offset, void *table, unsigned int index, unsigned int n) "s %p offset %"PRIu64" table %p index %u n %u"
+disable qed_write_table_cb(void *s, void *table, int flush, int ret) "s %p table %p flush %d ret %d"