struct files_struct *fsp;
unsigned int num_locks;
bool modified;
- bool have_read_oplocks;
+ uint32_t num_read_oplocks;
struct lock_struct *lock_data;
struct db_record *record;
};
return brl->fsp;
}
-bool brl_have_read_oplocks(const struct byte_range_lock *brl)
+uint32_t brl_num_read_oplocks(const struct byte_range_lock *brl)
{
- return brl->have_read_oplocks;
+ return brl->num_read_oplocks;
}
-void brl_set_have_read_oplocks(struct byte_range_lock *brl,
- bool have_read_oplocks)
+void brl_set_num_read_oplocks(struct byte_range_lock *brl,
+ uint32_t num_read_oplocks)
{
- DEBUG(10, ("Setting have_read_oplocks to %s\n",
- have_read_oplocks ? "true" : "false"));
+ DEBUG(10, ("Setting num_read_oplocks to %"PRIu32"\n",
+ num_read_oplocks));
SMB_ASSERT(brl->record != NULL); /* otherwise we're readonly */
- brl->have_read_oplocks = have_read_oplocks;
+ brl->num_read_oplocks = num_read_oplocks;
brl->modified = true;
}
void brl_init(bool read_only)
{
int tdb_flags;
+ char *db_path;
if (brlock_db) {
return;
tdb_flags |= TDB_SEQNUM;
}
- brlock_db = db_open(NULL, lock_path("brlock.tdb"),
+ db_path = lock_path("brlock.tdb");
+ if (db_path == NULL) {
+ DEBUG(0, ("out of memory!\n"));
+ return;
+ }
+
+ brlock_db = db_open(NULL, db_path,
SMB_OPEN_DATABASE_TDB_HASH_SIZE, tdb_flags,
read_only?O_RDONLY:(O_RDWR|O_CREAT), 0644,
DBWRAP_LOCK_ORDER_2, DBWRAP_FLAG_NONE);
if (!brlock_db) {
DEBUG(0,("Failed to open byte range locking database %s\n",
- lock_path("brlock.tdb")));
+ db_path));
+ TALLOC_FREE(db_path);
return;
}
+ TALLOC_FREE(db_path);
}
/****************************************************************************
static void byte_range_lock_flush(struct byte_range_lock *br_lck)
{
- size_t data_len;
unsigned i;
struct lock_struct *locks = br_lck->lock_data;
}
}
- data_len = br_lck->num_locks * sizeof(struct lock_struct);
-
- if (br_lck->have_read_oplocks) {
- data_len += 1;
- }
-
- DEBUG(10, ("data_len=%d\n", (int)data_len));
-
- if (data_len == 0) {
+ if ((br_lck->num_locks == 0) && (br_lck->num_read_oplocks == 0)) {
/* No locks - delete this entry. */
NTSTATUS status = dbwrap_record_delete(br_lck->record);
if (!NT_STATUS_IS_OK(status)) {
smb_panic("Could not delete byte range lock entry");
}
} else {
+ size_t lock_len, data_len;
TDB_DATA data;
NTSTATUS status;
+ lock_len = br_lck->num_locks * sizeof(struct lock_struct);
+ data_len = lock_len + sizeof(br_lck->num_read_oplocks);
+
data.dsize = data_len;
data.dptr = talloc_array(talloc_tos(), uint8_t, data_len);
SMB_ASSERT(data.dptr != NULL);
- memcpy(data.dptr, br_lck->lock_data,
- br_lck->num_locks * sizeof(struct lock_struct));
-
- if (br_lck->have_read_oplocks) {
- data.dptr[data_len-1] = 1;
- }
+ memcpy(data.dptr, br_lck->lock_data, lock_len);
+ memcpy(data.dptr + lock_len, &br_lck->num_read_oplocks,
+ sizeof(br_lck->num_read_oplocks));
status = dbwrap_record_store(br_lck->record, data, TDB_REPLACE);
TALLOC_FREE(data.dptr);
return 0;
}
+static bool brl_parse_data(struct byte_range_lock *br_lck, TDB_DATA data)
+{
+ size_t data_len;
+
+ if (data.dsize == 0) {
+ return true;
+ }
+ if (data.dsize % sizeof(struct lock_struct) !=
+ sizeof(br_lck->num_read_oplocks)) {
+ DEBUG(1, ("Invalid data size: %u\n", (unsigned)data.dsize));
+ return false;
+ }
+
+ br_lck->num_locks = data.dsize / sizeof(struct lock_struct);
+ data_len = br_lck->num_locks * sizeof(struct lock_struct);
+
+ br_lck->lock_data = talloc_memdup(br_lck, data.dptr, data_len);
+ if (br_lck->lock_data == NULL) {
+ DEBUG(1, ("talloc_memdup failed\n"));
+ return false;
+ }
+ memcpy(&br_lck->num_read_oplocks, data.dptr + data_len,
+ sizeof(br_lck->num_read_oplocks));
+ return true;
+}
+
/*******************************************************************
Fetch a set of byte range lock data from the database.
Leave the record locked.
struct byte_range_lock *brl_get_locks(TALLOC_CTX *mem_ctx, files_struct *fsp)
{
TDB_DATA key, data;
- struct byte_range_lock *br_lck = talloc(mem_ctx, struct byte_range_lock);
+ struct byte_range_lock *br_lck;
+ br_lck = talloc_zero(mem_ctx, struct byte_range_lock);
if (br_lck == NULL) {
return NULL;
}
br_lck->fsp = fsp;
- br_lck->num_locks = 0;
- br_lck->have_read_oplocks = false;
- br_lck->modified = False;
key.dptr = (uint8 *)&fsp->file_id;
key.dsize = sizeof(struct file_id);
data = dbwrap_record_get_value(br_lck->record);
- br_lck->lock_data = NULL;
-
- talloc_set_destructor(br_lck, byte_range_lock_destructor);
-
- br_lck->num_locks = data.dsize / sizeof(struct lock_struct);
-
- if (br_lck->num_locks != 0) {
- br_lck->lock_data = talloc_array(
- br_lck, struct lock_struct, br_lck->num_locks);
- if (br_lck->lock_data == NULL) {
- DEBUG(0, ("malloc failed\n"));
- TALLOC_FREE(br_lck);
- return NULL;
- }
-
- memcpy(br_lck->lock_data, data.dptr,
- talloc_get_size(br_lck->lock_data));
+ if (!brl_parse_data(br_lck, data)) {
+ TALLOC_FREE(br_lck);
+ return NULL;
}
- DEBUG(10, ("data.dsize=%d\n", (int)data.dsize));
-
- if ((data.dsize % sizeof(struct lock_struct)) == 1) {
- br_lck->have_read_oplocks = (data.dptr[data.dsize-1] == 1);
- }
+ talloc_set_destructor(br_lck, byte_range_lock_destructor);
if (DEBUGLEVEL >= 10) {
unsigned int i;
{
struct brl_get_locks_readonly_state *state =
(struct brl_get_locks_readonly_state *)private_data;
- struct byte_range_lock *br_lock;
+ struct byte_range_lock *br_lck;
- br_lock = talloc_pooled_object(
+ br_lck = talloc_pooled_object(
state->mem_ctx, struct byte_range_lock, 1, data.dsize);
- if (br_lock == NULL) {
+ if (br_lck == NULL) {
*state->br_lock = NULL;
return;
}
- br_lock->lock_data = (struct lock_struct *)talloc_memdup(
- br_lock, data.dptr, data.dsize);
- br_lock->num_locks = data.dsize / sizeof(struct lock_struct);
-
- if ((data.dsize % sizeof(struct lock_struct)) == 1) {
- br_lock->have_read_oplocks = (data.dptr[data.dsize-1] == 1);
- } else {
- br_lock->have_read_oplocks = false;
+ if (!brl_parse_data(br_lck, data)) {
+ *state->br_lock = NULL;
+ return;
}
-
- DEBUG(10, ("Got %d bytes, have_read_oplocks: %s\n", (int)data.dsize,
- br_lock->have_read_oplocks ? "true" : "false"));
-
- *state->br_lock = br_lock;
+ *state->br_lock = br_lck;
}
struct byte_range_lock *brl_get_locks_readonly(files_struct *fsp)
return NULL;
}
- br_lock->have_read_oplocks = false;
+ br_lock->num_read_oplocks = 0;
br_lock->num_locks = 0;
br_lock->lock_data = NULL;
git.samba.org / obnox / samba / samba-obnox.git / blobdiff