[haiku-development] [PATCH] Create BFS UUID
- From: Vladimir 'φ-coder/phcoder' Serbinenko <phcoder@xxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 31 Oct 2011 11:58:03 +0100
This patch adds handling BFS UUID. However it has a problem of using bad
random numbers. Can someone suggest a better RNG in Haiku?
--
Regards
Vladimir 'φ-coder/phcoder' Serbinenko
Index: src/add-ons/kernel/file_systems/bfs/Volume.cpp
===================================================================
--- src/add-ons/kernel/file_systems/bfs/Volume.cpp (revision 42928)
+++ src/add-ons/kernel/file_systems/bfs/Volume.cpp (working copy)
@@ -10,6 +10,7 @@
#include "Volume.h"
#include "Journal.h"
#include "Inode.h"
+#include "Attribute.h"
#include "Query.h"
@@ -412,19 +413,45 @@
// we don't use the vnode layer to access the
indices node
}
- // all went fine
- opener.Keep();
- return B_OK;
} else
+ {
FATAL(("could not create root node: publish_vnode()
failed!\n"));
+ delete fRootNode;
+ return status;
+ }
- delete fRootNode;
} else {
status = B_BAD_VALUE;
FATAL(("could not create root node!\n"));
+ return status;
}
- return status;
+ if (!(fFlags & VOLUME_READ_ONLY)) {
+ Attribute attr(fRootNode);
+ status_t s;
+ s = attr.Get ("be:volume_id");
+ if (s == B_ENTRY_NOT_FOUND) {
+ attr_cookie* cookie;
+ s = attr.Create("be:volume_id", 0x554c4c47, O_RDWR,
+ &cookie);
+ if (s == B_OK) {
+ uint64_t vid;
+ size_t len = sizeof (vid);
+ Transaction transaction(this,
+
fRootNode->BlockNumber());
+ srand(time(NULL));
+ vid = ((uint64_t) rand () << 32) | rand ();
+ fRootNode->WriteLockInTransaction(transaction);
+ attr.Write(transaction, cookie, 0,
+ (uint8_t *) &vid, &len, NULL);
+ transaction.Done();
+ }
+ }
+ }
+
+ // all went fine
+ opener.Keep();
+ return B_OK;
}
@@ -732,6 +759,23 @@
return status;
}
+ {
+ Attribute attr(fRootNode);
+ status_t s;
+ attr_cookie* cookie;
+ s = attr.Create("be:volume_id", 0x554c4c47, O_RDWR,
+ &cookie);
+ if (s == B_OK) {
+ uint64_t vid;
+ size_t len = sizeof (vid);
+ srand(time(NULL));
+ vid = ((uint64_t) rand () << 32) | rand ();
+ attr.Write(transaction, cookie, 0,
+ (uint8_t *) &vid, &len, NULL);
+ }
+ }
+
+
WriteSuperBlock();
transaction.Done();
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