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);
}
/****************************************************************************
return true;
}
-/****************************************************************************
- Ensure this set of lock entries is valid.
-****************************************************************************/
-static bool validate_lock_entries(unsigned int *pnum_entries, struct lock_struct **pplocks,
- bool keep_disconnected)
-{
- unsigned int i;
- struct lock_struct *locks = *pplocks;
- unsigned int num_entries = *pnum_entries;
- TALLOC_CTX *frame;
- struct server_id *ids;
- bool *exists;
-
- if (num_entries == 0) {
- return true;
- }
-
- frame = talloc_stackframe();
-
- ids = talloc_array(frame, struct server_id, num_entries);
- if (ids == NULL) {
- DEBUG(0, ("validate_lock_entries: "
- "talloc_array(struct server_id, %u) failed\n",
- num_entries));
- talloc_free(frame);
- return false;
- }
-
- exists = talloc_array(frame, bool, num_entries);
- if (exists == NULL) {
- DEBUG(0, ("validate_lock_entries: "
- "talloc_array(bool, %u) failed\n",
- num_entries));
- talloc_free(frame);
- return false;
- }
-
- for (i = 0; i < num_entries; i++) {
- ids[i] = locks[i].context.pid;
- }
-
- if (!serverids_exist(ids, num_entries, exists)) {
- DEBUG(3, ("validate_lock_entries: serverids_exists failed\n"));
- talloc_free(frame);
- return false;
- }
-
- i = 0;
-
- while (i < num_entries) {
- if (exists[i]) {
- i++;
- continue;
- }
-
- if (keep_disconnected &&
- server_id_is_disconnected(&ids[i]))
- {
- i++;
- continue;
- }
-
- /* This process no longer exists */
-
- brl_delete_lock_struct(locks, num_entries, i);
- num_entries -= 1;
- }
- TALLOC_FREE(frame);
-
- *pnum_entries = num_entries;
-
- return True;
-}
-
struct brl_forall_cb {
void (*fn)(struct file_id id, struct server_id pid,
enum brl_type lock_type,
struct file_id *key;
unsigned int i;
unsigned int num_locks = 0;
- unsigned int orig_num_locks = 0;
TDB_DATA dbkey;
TDB_DATA value;
}
key = (struct file_id *)dbkey.dptr;
- orig_num_locks = num_locks = value.dsize/sizeof(*locks);
-
- /* Ensure the lock db is clean of entries from invalid processes. */
-
- if (!validate_lock_entries(&num_locks, &locks, true)) {
- TALLOC_FREE(locks);
- return -1; /* Terminate traversal */
- }
-
- if (orig_num_locks != num_locks) {
- if (num_locks) {
- TDB_DATA data;
- data.dptr = (uint8_t *)locks;
- data.dsize = num_locks*sizeof(struct lock_struct);
- dbwrap_record_store(rec, data, TDB_REPLACE);
- } else {
- dbwrap_record_delete(rec);
- }
- }
+ num_locks = value.dsize/sizeof(*locks);
if (cb->fn) {
for ( i=0; i<num_locks; i++) {
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;
+ *br_lck = (struct byte_range_lock) {};
+ 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)
{
struct byte_range_lock *br_lock = NULL;
- struct byte_range_lock *rw = NULL;
+ struct brl_get_locks_readonly_state state;
+ NTSTATUS status;
DEBUG(10, ("seqnum=%d, fsp->brlock_seqnum=%d\n",
dbwrap_get_seqnum(brlock_db), fsp->brlock_seqnum));
return fsp->brlock_rec;
}
- if (rw != NULL) {
- size_t lock_data_size;
+ /*
+ * Parse the record fresh from the database
+ */
+
+ state.mem_ctx = fsp;
+ state.br_lock = &br_lock;
+ status = dbwrap_parse_record(
+ brlock_db,
+ make_tdb_data((uint8_t *)&fsp->file_id,
+ sizeof(fsp->file_id)),
+ brl_get_locks_readonly_parser, &state);
+
+ if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_FOUND)) {
/*
- * Make a copy of the already retrieved and sanitized rw record
+ * No locks on this file. Return an empty br_lock.
*/
- lock_data_size = rw->num_locks * sizeof(struct lock_struct);
- br_lock = talloc_pooled_object(
- fsp, struct byte_range_lock, 1, lock_data_size);
+ br_lock = talloc(fsp, struct byte_range_lock);
if (br_lock == NULL) {
- goto fail;
+ return NULL;
}
- br_lock->have_read_oplocks = rw->have_read_oplocks;
- br_lock->num_locks = rw->num_locks;
- br_lock->lock_data = (struct lock_struct *)talloc_memdup(
- br_lock, rw->lock_data, lock_data_size);
- } else {
- struct brl_get_locks_readonly_state state;
- NTSTATUS status;
-
- /*
- * Parse the record fresh from the database
- */
-
- state.mem_ctx = fsp;
- state.br_lock = &br_lock;
- status = dbwrap_parse_record(
- brlock_db,
- make_tdb_data((uint8_t *)&fsp->file_id,
- sizeof(fsp->file_id)),
- brl_get_locks_readonly_parser, &state);
+ br_lock->num_read_oplocks = 0;
+ br_lock->num_locks = 0;
+ br_lock->lock_data = NULL;
- if (NT_STATUS_EQUAL(status,NT_STATUS_NOT_FOUND)) {
- /*
- * No locks on this file. Return an empty br_lock.
- */
- br_lock = talloc(fsp, struct byte_range_lock);
- if (br_lock == NULL) {
- goto fail;
- }
-
- br_lock->have_read_oplocks = false;
- br_lock->num_locks = 0;
- br_lock->lock_data = NULL;
-
- } else if (!NT_STATUS_IS_OK(status)) {
- DEBUG(3, ("Could not parse byte range lock record: "
- "%s\n", nt_errstr(status)));
- goto fail;
- }
- if (br_lock == NULL) {
- goto fail;
- }
+ } else if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(3, ("Could not parse byte range lock record: "
+ "%s\n", nt_errstr(status)));
+ return NULL;
+ }
+ if (br_lock == NULL) {
+ return NULL;
}
br_lock->fsp = fsp;
fsp->brlock_seqnum = dbwrap_get_seqnum(brlock_db);
}
-fail:
- TALLOC_FREE(rw);
return br_lock;
}
git.samba.org / obnox / samba / samba-obnox.git / blobdiff