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authorStefan Metzmacher <metze@samba.org>2008-02-22 17:26:40 +0100
committerStefan Metzmacher <metze@samba.org>2008-02-26 09:29:41 +0100
commitc749b66ead71af3076d4f911aa0cd65e35284ca4 (patch)
treea0f4c2b73687fcee2d582c2cb207ae38e6733795 /source4/ntvfs
parente5547201af12a7890b88585fd394f4ac59022b83 (diff)
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opendb_tdb: attribute only opens doesn't conflict with BATCH oplocks
metze (This used to be commit 7872b05abe7532676c4cc25620b96ea5d59117d2)
Diffstat (limited to 'source4/ntvfs')
-rw-r--r--source4/ntvfs/common/opendb_tdb.c37
1 files changed, 35 insertions, 2 deletions
diff --git a/source4/ntvfs/common/opendb_tdb.c b/source4/ntvfs/common/opendb_tdb.c
index 3310532406..b445981b57 100644
--- a/source4/ntvfs/common/opendb_tdb.c
+++ b/source4/ntvfs/common/opendb_tdb.c
@@ -189,7 +189,7 @@ static NTSTATUS share_conflict(struct opendb_entry *e1, struct opendb_entry *e2)
e2->share_access, NTCREATEX_SHARE_ACCESS_DELETE);
CHECK_MASK(e2->access_mask, SEC_STD_DELETE,
e1->share_access, NTCREATEX_SHARE_ACCESS_DELETE);
-
+#undef CHECK_MASK
return NT_STATUS_OK;
}
@@ -284,6 +284,25 @@ static NTSTATUS odb_oplock_break_send(struct odb_context *odb,
return NT_STATUS_OK;
}
+static bool access_attributes_only(uint32_t access_mask,
+ uint32_t open_disposition)
+{
+ switch (open_disposition) {
+ case NTCREATEX_DISP_SUPERSEDE:
+ case NTCREATEX_DISP_OVERWRITE_IF:
+ case NTCREATEX_DISP_OVERWRITE:
+ return false;
+ default:
+ break;
+ }
+#define CHECK_MASK(m,g) ((m) && (((m) & ~(g))==0) && (((m) & (g)) != 0))
+ return CHECK_MASK(access_mask,
+ SEC_STD_SYNCHRONIZE |
+ SEC_FILE_READ_ATTRIBUTE |
+ SEC_FILE_WRITE_ATTRIBUTE);
+#undef CHECK_MASK
+}
+
/*
register an open file in the open files database. This implements the share_access
rules
@@ -302,6 +321,8 @@ static NTSTATUS odb_tdb_open_file(struct odb_lock *lck, void *file_handle,
int i;
struct opendb_file file;
NTSTATUS status;
+ uint32_t open_disposition = 0;
+ bool attrs_only = false;
if (odb->oplocks == false) {
oplock_level = OPLOCK_NONE;
@@ -328,6 +349,15 @@ static NTSTATUS odb_tdb_open_file(struct odb_lock *lck, void *file_handle,
/* see if anyone has an oplock, which we need to break */
for (i=0;i<file.num_entries;i++) {
if (file.entries[i].oplock_level == OPLOCK_BATCH) {
+ /* if this is an attribute only access
+ * it doesn't conflict with a BACTCH oplock
+ * but we'll not grant the oplock below
+ */
+ attrs_only = access_attributes_only(access_mask,
+ open_disposition);
+ if (attrs_only) {
+ break;
+ }
/* a batch oplock caches close calls, which
means the client application might have
already closed the file. We have to allow
@@ -370,7 +400,10 @@ static NTSTATUS odb_tdb_open_file(struct odb_lock *lck, void *file_handle,
possibly grant an exclusive, batch or level2 oplock
*/
if (oplock_granted) {
- if (oplock_level == OPLOCK_EXCLUSIVE) {
+ if (attrs_only) {
+ e.oplock_level = OPLOCK_NONE;
+ *oplock_granted = NO_OPLOCK_RETURN;
+ } else if (oplock_level == OPLOCK_EXCLUSIVE) {
if (file.num_entries == 0) {
e.oplock_level = OPLOCK_EXCLUSIVE;
*oplock_granted = EXCLUSIVE_OPLOCK_RETURN;