r7792: make the allocation size rounding in pvfs configurable

(This used to be commit 1f35642bed1129d0834906b3e94e8868992d6eb9)

3 files changed, 8 insertions, 3 deletions

diff --git a/source4/ntvfs/posix/pvfs_util.c b/source4/ntvfs/posix/pvfs_util.c
index d716834fed..f286dfdc48 100644
--- a/source4/ntvfs/posix/pvfs_util.c
+++ b/source4/ntvfs/posix/pvfs_util.c
@@ -198,7 +198,6 @@ uint32_t pvfs_name_hash(const char *key, size_t length)
 */
 uint64_t pvfs_round_alloc_size(struct pvfs_state *pvfs, uint64_t size)
 {
-	const uint64_t round_value = 511;
-	if (size == 0) return 0;
-	return (size + round_value) & ~round_value;
+	const uint32_t round_value = pvfs->alloc_size_rounding;
+	return round_value * ((size + round_value - 1)/round_value);
 }
diff --git a/source4/ntvfs/posix/vfs_posix.c b/source4/ntvfs/posix/vfs_posix.c
index 846ba61a86..906428fc6d 100644
--- a/source4/ntvfs/posix/vfs_posix.c
+++ b/source4/ntvfs/posix/vfs_posix.c
@@ -51,6 +51,9 @@ static void pvfs_setup_options(struct pvfs_state *pvfs)
 		pvfs->flags |= PVFS_FLAG_FAKE_OPLOCKS;
 	}
 
+	/* this must be a power of 2 */
+	pvfs->alloc_size_rounding = lp_parm_int(-1, "posix", "allocationrounding", 512);
+
 #if HAVE_XATTR_SUPPORT
 	if (lp_parm_bool(snum, "posix", "xattr", True)) pvfs->flags |= PVFS_FLAG_XATTR_ENABLE;
 #endif
diff --git a/source4/ntvfs/posix/vfs_posix.h b/source4/ntvfs/posix/vfs_posix.h
index a55674d69a..b5b0e2b28d 100644
--- a/source4/ntvfs/posix/vfs_posix.h
+++ b/source4/ntvfs/posix/vfs_posix.h
@@ -72,6 +72,9 @@ struct pvfs_state {
 	/* if posix:eadb is set, then this gets setup */
 	struct tdb_wrap *ea_db;
 
+	/* the allocation size rounding */
+	uint32_t alloc_size_rounding;
+	
 	/* used to accelerate acl mapping */
 	struct {
 		const struct dom_sid *creator_owner;