r3798: added support for alternate data streams in xattrs into pvfs.

The trickiest part about this was getting the sharing and locking
rules right, as alternate streams are separate locking spaces from the
main file for the purposes of byte range locking, and separate for
most share violation rules.

I suspect there are still problems with delete on close with alternate
data streams. I'll look at that next.
(This used to be commit b6452c4a2068cf7e837778559da002ae191b508a)

1 files changed, 27 insertions, 0 deletions

diff --git a/source4/ntvfs/posix/pvfs_util.c b/source4/ntvfs/posix/pvfs_util.c
index 6503769013..9f617d39d4 100644
--- a/source4/ntvfs/posix/pvfs_util.c
+++ b/source4/ntvfs/posix/pvfs_util.c
@@ -160,3 +160,30 @@ NTSTATUS pvfs_copy_file(struct pvfs_state *pvfs,
 
 	return NT_STATUS_OK;
 }
+
+
+/* 
+   hash a string of the specified length. The string does not need to be
+   null terminated 
+
+   hash alghorithm changed to FNV1 by idra@samba.org (Simo Sorce).
+   see http://www.isthe.com/chongo/tech/comp/fnv/index.html for a
+   discussion on Fowler / Noll / Vo (FNV) Hash by one of it's authors
+*/
+uint32_t pvfs_name_hash(const char *key, size_t length)
+{
+	const uint32_t fnv1_prime = 0x01000193;
+	const uint32_t fnv1_init = 0xa6b93095;
+	uint32_t value = fnv1_init;
+
+	while (*key && length--) {
+		size_t c_size;
+		codepoint_t c = next_codepoint(key, &c_size);
+		c = toupper_w(c);
+                value *= fnv1_prime;
+                value ^= (uint32_t)c;
+		key += c_size;
+        }
+
+	return value;
+}