#define DBGC_CLASS DBGC_LOCKING
#include "includes.h"
+#include "lib/util/server_id.h"
#include "smbd/smbd.h"
#include "smbd/globals.h"
#include "messages.h"
-#include "../librpc/gen_ndr/open_files.h"
-
-/****************************************************************************
- Get the number of current exclusive oplocks.
-****************************************************************************/
-
-int32 get_number_of_exclusive_open_oplocks(void)
-{
- return exclusive_oplocks_open;
-}
+#include "../librpc/gen_ndr/ndr_open_files.h"
/*
* helper function used by the kernel oplock backends to post the break message
/****************************************************************************
Attempt to set an oplock on a file. Succeeds if kernel oplocks are
- disabled (just sets flags) and no byte-range locks in the file. Returns True
- if oplock set.
+ disabled (just sets flags).
****************************************************************************/
-bool set_file_oplock(files_struct *fsp, int oplock_type)
+NTSTATUS set_file_oplock(files_struct *fsp)
{
- if (fsp->oplock_type == LEVEL_II_OPLOCK) {
- if (koplocks &&
- !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) {
- DEBUG(10, ("Refusing level2 oplock, kernel oplocks "
- "don't support them\n"));
- return false;
- }
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+ bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) &&
+ (koplocks != NULL);
+
+ if (fsp->oplock_type == LEVEL_II_OPLOCK && use_kernel) {
+ DEBUG(10, ("Refusing level2 oplock, kernel oplocks "
+ "don't support them\n"));
+ return NT_STATUS_NOT_SUPPORTED;
}
if ((fsp->oplock_type != NO_OPLOCK) &&
- (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
- koplocks &&
- !koplocks->ops->set_oplock(koplocks, fsp, oplock_type)) {
- return False;
+ use_kernel &&
+ !koplocks->ops->set_oplock(koplocks, fsp, fsp->oplock_type))
+ {
+ return map_nt_error_from_unix(errno);
}
- fsp->oplock_type = oplock_type;
fsp->sent_oplock_break = NO_BREAK_SENT;
- if (oplock_type == LEVEL_II_OPLOCK) {
- level_II_oplocks_open++;
+ if (fsp->oplock_type == LEVEL_II_OPLOCK) {
+ sconn->oplocks.level_II_open++;
} else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- exclusive_oplocks_open++;
+ sconn->oplocks.exclusive_open++;
}
DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
(int)fsp->open_time.tv_usec ));
- return True;
+ return NT_STATUS_OK;
}
/****************************************************************************
Attempt to release an oplock on a file. Decrements oplock count.
****************************************************************************/
-void release_file_oplock(files_struct *fsp)
+static void release_file_oplock(files_struct *fsp)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+ bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) &&
+ (koplocks != NULL);
+
if ((fsp->oplock_type != NO_OPLOCK) &&
- (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
- koplocks) {
+ use_kernel) {
koplocks->ops->release_oplock(koplocks, fsp, NO_OPLOCK);
}
if (fsp->oplock_type == LEVEL_II_OPLOCK) {
- level_II_oplocks_open--;
+ sconn->oplocks.level_II_open--;
} else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- exclusive_oplocks_open--;
+ sconn->oplocks.exclusive_open--;
}
- SMB_ASSERT(exclusive_oplocks_open>=0);
- SMB_ASSERT(level_II_oplocks_open>=0);
+ SMB_ASSERT(sconn->oplocks.exclusive_open>=0);
+ SMB_ASSERT(sconn->oplocks.level_II_open>=0);
- if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- /* This doesn't matter for close. */
- fsp->oplock_type = FAKE_LEVEL_II_OPLOCK;
- } else {
- fsp->oplock_type = NO_OPLOCK;
- }
+ fsp->oplock_type = NO_OPLOCK;
fsp->sent_oplock_break = NO_BREAK_SENT;
- flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
+ flush_write_cache(fsp, SAMBA_OPLOCK_RELEASE_FLUSH);
delete_write_cache(fsp);
TALLOC_FREE(fsp->oplock_timeout);
static void downgrade_file_oplock(files_struct *fsp)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+ bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) &&
+ (koplocks != NULL);
+
if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n"));
return;
}
- if (koplocks) {
+ if (use_kernel) {
koplocks->ops->release_oplock(koplocks, fsp, LEVEL_II_OPLOCK);
}
fsp->oplock_type = LEVEL_II_OPLOCK;
- exclusive_oplocks_open--;
- level_II_oplocks_open++;
+ sconn->oplocks.exclusive_open--;
+ sconn->oplocks.level_II_open++;
fsp->sent_oplock_break = NO_BREAK_SENT;
+
+ flush_write_cache(fsp, SAMBA_OPLOCK_RELEASE_FLUSH);
+ delete_write_cache(fsp);
+
+ TALLOC_FREE(fsp->oplock_timeout);
+}
+
+uint32_t get_lease_type(const struct share_mode_data *d,
+ const struct share_mode_entry *e)
+{
+ if (e->op_type == LEASE_OPLOCK) {
+ return d->leases[e->lease_idx].current_state;
+ }
+ return map_oplock_to_lease_type(e->op_type);
+}
+
+bool update_num_read_oplocks(files_struct *fsp, struct share_mode_lock *lck)
+{
+ struct share_mode_data *d = lck->data;
+ struct byte_range_lock *br_lck;
+ uint32_t num_read_oplocks = 0;
+ uint32_t i;
+
+ if (fsp_lease_type_is_exclusive(fsp)) {
+ const struct share_mode_entry *e = NULL;
+ uint32_t e_lease_type = 0;
+
+ /*
+ * If we're fully exclusive, we don't need a brlock entry
+ */
+ remove_stale_share_mode_entries(d);
+
+ e = find_share_mode_entry(lck, fsp);
+ if (e != NULL) {
+ e_lease_type = get_lease_type(d, e);
+ }
+
+ if (!lease_type_is_exclusive(e_lease_type)) {
+ char *timestr = NULL;
+
+ timestr = timeval_string(talloc_tos(),
+ &fsp->open_time,
+ true);
+
+ NDR_PRINT_DEBUG(share_mode_data, d);
+ DBG_ERR("file [%s] file_id [%s] gen_id [%lu] "
+ "open_time[%s] lease_type [0x%x] "
+ "oplock_type [0x%x]\n",
+ fsp_str_dbg(fsp),
+ file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id, timestr,
+ e_lease_type, fsp->oplock_type);
+
+ smb_panic("Found non-exclusive lease");
+ }
+
+ return true;
+ }
+
+ for (i=0; i<d->num_share_modes; i++) {
+ struct share_mode_entry *e = &d->share_modes[i];
+ uint32_t e_lease_type = get_lease_type(d, e);
+
+ if (e_lease_type & SMB2_LEASE_READ) {
+ num_read_oplocks += 1;
+ }
+ }
+
+ br_lck = brl_get_locks_readonly(fsp);
+ if (br_lck == NULL) {
+ return false;
+ }
+ if (brl_num_read_oplocks(br_lck) == num_read_oplocks) {
+ return true;
+ }
+
+ br_lck = brl_get_locks(talloc_tos(), fsp);
+ if (br_lck == NULL) {
+ return false;
+ }
+ brl_set_num_read_oplocks(br_lck, num_read_oplocks);
+ TALLOC_FREE(br_lck);
+ return true;
+}
+
+/****************************************************************************
+ Remove a file oplock with lock already held. Copes with level II and exclusive.
+****************************************************************************/
+
+bool remove_oplock_under_lock(files_struct *fsp, struct share_mode_lock *lck)
+{
+ bool ret;
+
+ ret = remove_share_oplock(lck, fsp);
+ if (!ret) {
+ DBG_ERR("failed to remove share oplock for "
+ "file %s, %s, %s\n",
+ fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
+ file_id_string_tos(&fsp->file_id));
+ }
+ release_file_oplock(fsp);
+
+ ret = update_num_read_oplocks(fsp, lck);
+ if (!ret) {
+ DBG_ERR("update_num_read_oplocks failed for "
+ "file %s, %s, %s\n",
+ fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
+ file_id_string_tos(&fsp->file_id));
+ }
+
+ return ret;
}
/****************************************************************************
bool ret;
struct share_mode_lock *lck;
+ DBG_DEBUG("remove_oplock called for %s\n", fsp_str_dbg(fsp));
+
/* Remove the oplock flag from the sharemode. */
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
- DEBUG(0,("remove_oplock: failed to lock share entry for "
- "file %s\n", fsp_str_dbg(fsp)));
- return False;
+ DBG_ERR("failed to lock share entry for "
+ "file %s\n", fsp_str_dbg(fsp));
+ return false;
}
- ret = remove_share_oplock(lck, fsp);
- if (!ret) {
- DEBUG(0,("remove_oplock: failed to remove share oplock for "
- "file %s fnum %d, %s\n",
- fsp_str_dbg(fsp), fsp->fnum,
- file_id_string_tos(&fsp->file_id)));
- }
- release_file_oplock(fsp);
+
+ ret = remove_oplock_under_lock(fsp, lck);
+
TALLOC_FREE(lck);
return ret;
}
bool ret;
struct share_mode_lock *lck;
+ DEBUG(10, ("downgrade_oplock called for %s\n",
+ fsp_str_dbg(fsp)));
+
lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("downgrade_oplock: failed to lock share entry for "
ret = downgrade_share_oplock(lck, fsp);
if (!ret) {
DEBUG(0,("downgrade_oplock: failed to downgrade share oplock "
- "for file %s fnum %d, file_id %s\n",
- fsp_str_dbg(fsp), fsp->fnum,
+ "for file %s, %s, file_id %s\n",
+ fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
-
downgrade_file_oplock(fsp);
+
+ ret = update_num_read_oplocks(fsp, lck);
+ if (!ret) {
+ DEBUG(0, ("%s: update_num_read_oplocks failed for "
+ "file %s, %s, %s\n",
+ __func__, fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
+ file_id_string_tos(&fsp->file_id)));
+ }
+
TALLOC_FREE(lck);
return ret;
}
-/*
- * Some kernel oplock implementations handle the notification themselves.
- */
-bool should_notify_deferred_opens()
+static void lease_timeout_handler(struct tevent_context *ctx,
+ struct tevent_timer *te,
+ struct timeval now,
+ void *private_data)
+{
+ struct fsp_lease *lease =
+ talloc_get_type_abort(private_data,
+ struct fsp_lease);
+ struct files_struct *fsp;
+ struct share_mode_lock *lck;
+ uint16_t old_epoch = lease->lease.lease_epoch;
+
+ /*
+ * This function runs without any specific impersonation
+ * and must not call any SMB_VFS operations!
+ */
+
+ fsp = file_find_one_fsp_from_lease_key(lease->sconn,
+ &lease->lease.lease_key);
+ if (fsp == NULL) {
+ /* race? */
+ TALLOC_FREE(lease->timeout);
+ return;
+ }
+
+ /*
+ * Paranoia check: There can only be one fsp_lease per lease
+ * key
+ */
+ SMB_ASSERT(fsp->lease == lease);
+
+ lck = get_existing_share_mode_lock(
+ talloc_tos(), fsp->file_id);
+ if (lck == NULL) {
+ /* race? */
+ TALLOC_FREE(lease->timeout);
+ return;
+ }
+
+ fsp_lease_update(lck, fsp_client_guid(fsp), lease);
+
+ if (lease->lease.lease_epoch != old_epoch) {
+ /*
+ * If the epoch changed we need to wait for
+ * the next timeout to happen.
+ */
+ DEBUG(10, ("lease break timeout race (epoch) for file %s - ignoring\n",
+ fsp_str_dbg(fsp)));
+ TALLOC_FREE(lck);
+ return;
+ }
+
+ if (!(lease->lease.lease_flags & SMB2_LEASE_FLAG_BREAK_IN_PROGRESS)) {
+ /*
+ * If the epoch changed we need to wait for
+ * the next timeout to happen.
+ */
+ DEBUG(10, ("lease break timeout race (flags) for file %s - ignoring\n",
+ fsp_str_dbg(fsp)));
+ TALLOC_FREE(lck);
+ return;
+ }
+
+ DEBUG(1, ("lease break timed out for file %s -- replying anyway\n",
+ fsp_str_dbg(fsp)));
+ (void)downgrade_lease(lease->sconn->client->connections,
+ 1,
+ &fsp->file_id,
+ &lease->lease.lease_key,
+ SMB2_LEASE_NONE);
+
+ TALLOC_FREE(lck);
+}
+
+bool fsp_lease_update(struct share_mode_lock *lck,
+ const struct GUID *client_guid,
+ struct fsp_lease *lease)
{
- return !(koplocks &&
- (koplocks->flags & KOPLOCKS_DEFERRED_OPEN_NOTIFICATION));
+ struct share_mode_data *d = lck->data;
+ int idx;
+ struct share_mode_lease *l = NULL;
+
+ idx = find_share_mode_lease(d, client_guid, &lease->lease.lease_key);
+ if (idx == -1) {
+ DEBUG(1, ("%s: Could not find lease entry\n", __func__));
+ TALLOC_FREE(lease->timeout);
+ lease->lease.lease_state = SMB2_LEASE_NONE;
+ lease->lease.lease_epoch += 1;
+ lease->lease.lease_flags = 0;
+ return false;
+ }
+
+ l = &d->leases[idx];
+
+ DEBUG(10,("%s: refresh lease state\n", __func__));
+
+ /* Ensure we're in sync with current lease state. */
+ if (lease->lease.lease_epoch != l->epoch) {
+ DEBUG(10,("%s: cancel outdated timeout\n", __func__));
+ TALLOC_FREE(lease->timeout);
+ }
+ lease->lease.lease_epoch = l->epoch;
+ lease->lease.lease_state = l->current_state;
+
+ if (l->breaking) {
+ lease->lease.lease_flags |= SMB2_LEASE_FLAG_BREAK_IN_PROGRESS;
+
+ if (lease->timeout == NULL) {
+ struct timeval t = timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0);
+
+ DEBUG(10,("%s: setup timeout handler\n", __func__));
+
+ /*
+ * lease_timeout_handler() only accesses locking.tdb
+ * so we don't use any impersonation and use
+ * the raw tevent context.
+ */
+ lease->timeout = tevent_add_timer(lease->sconn->raw_ev_ctx,
+ lease, t,
+ lease_timeout_handler,
+ lease);
+ if (lease->timeout == NULL) {
+ DEBUG(0, ("%s: Could not add lease timeout handler\n",
+ __func__));
+ }
+ }
+ } else {
+ lease->lease.lease_flags &= ~SMB2_LEASE_FLAG_BREAK_IN_PROGRESS;
+ TALLOC_FREE(lease->timeout);
+ }
+
+ return true;
}
-/****************************************************************************
- Set up an oplock break message.
-****************************************************************************/
+struct downgrade_lease_additional_state {
+ struct tevent_immediate *im;
+ struct smbXsrv_connection *xconn;
+ uint32_t break_flags;
+ struct smb2_lease_key lease_key;
+ uint32_t break_from;
+ uint32_t break_to;
+ uint16_t new_epoch;
+};
-static char *new_break_message_smb1(TALLOC_CTX *mem_ctx,
- files_struct *fsp, int cmd)
+static void downgrade_lease_additional_trigger(struct tevent_context *ev,
+ struct tevent_immediate *im,
+ void *private_data)
{
- char *result = talloc_array(mem_ctx, char, smb_size + 8*2 + 0);
+ struct downgrade_lease_additional_state *state =
+ talloc_get_type_abort(private_data,
+ struct downgrade_lease_additional_state);
+ struct smbXsrv_connection *xconn = state->xconn;
+ NTSTATUS status;
+
+ status = smbd_smb2_send_lease_break(xconn,
+ state->new_epoch,
+ state->break_flags,
+ &state->lease_key,
+ state->break_from,
+ state->break_to);
+ TALLOC_FREE(state);
+ if (!NT_STATUS_IS_OK(status)) {
+ smbd_server_connection_terminate(xconn,
+ nt_errstr(status));
+ return;
+ }
+}
+
+struct downgrade_lease_fsps_state {
+ struct file_id id;
+ struct share_mode_lock *lck;
+ const struct smb2_lease_key *key;
+};
+
+static struct files_struct *downgrade_lease_fsps(struct files_struct *fsp,
+ void *private_data)
+{
+ struct downgrade_lease_fsps_state *state =
+ (struct downgrade_lease_fsps_state *)private_data;
- if (result == NULL) {
- DEBUG(0, ("talloc failed\n"));
+ if (fsp->oplock_type != LEASE_OPLOCK) {
return NULL;
}
+ if (!smb2_lease_key_equal(&fsp->lease->lease.lease_key, state->key)) {
+ return NULL;
+ }
+ if (!file_id_equal(&fsp->file_id, &state->id)) {
+ return NULL;
+ }
+
+ fsp_lease_update(state->lck, fsp_client_guid(fsp), fsp->lease);
+
+ return NULL;
+}
+
+static NTSTATUS downgrade_share_lease(struct smbd_server_connection *sconn,
+ struct share_mode_lock *lck,
+ const struct smb2_lease_key *key,
+ uint32_t new_lease_state,
+ struct share_mode_lease **_l)
+{
+ struct share_mode_data *d = lck->data;
+ struct share_mode_lease *l;
+ int idx;
+
+ *_l = NULL;
+
+ idx = find_share_mode_lease(
+ d, &sconn->client->connections->smb2.client.guid, key);
+ if (idx == -1) {
+ DEBUG(10, ("lease not found\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ l = &d->leases[idx];
+
+ if (!l->breaking) {
+ DBG_WARNING("Attempt to break from %"PRIu32" to %"PRIu32" - "
+ "but we're not in breaking state\n",
+ l->current_state, new_lease_state);
+ return NT_STATUS_UNSUCCESSFUL;
+ }
+
+ /*
+ * Can't upgrade anything: l->breaking_to_requested (and l->current_state)
+ * must be a strict bitwise superset of new_lease_state
+ */
+ if ((new_lease_state & l->breaking_to_requested) != new_lease_state) {
+ DBG_WARNING("Attempt to upgrade from %"PRIu32" to %"PRIu32" "
+ "- expected %"PRIu32"\n",
+ l->current_state, new_lease_state,
+ l->breaking_to_requested);
+ return NT_STATUS_REQUEST_NOT_ACCEPTED;
+ }
+
+ if (l->current_state != new_lease_state) {
+ l->current_state = new_lease_state;
+ d->modified = true;
+ }
+
+ if ((new_lease_state & ~l->breaking_to_required) != 0) {
+ DBG_INFO("lease state %"PRIu32" not fully broken from "
+ "%"PRIu32" to %"PRIu32"\n",
+ new_lease_state,
+ l->current_state,
+ l->breaking_to_required);
+ l->breaking_to_requested = l->breaking_to_required;
+ if (l->current_state & (~SMB2_LEASE_READ)) {
+ /*
+ * Here we break in steps, as windows does
+ * see the breaking3 and v2_breaking3 tests.
+ */
+ l->breaking_to_requested |= SMB2_LEASE_READ;
+ }
+ d->modified = true;
+ *_l = l;
+ return NT_STATUS_OPLOCK_BREAK_IN_PROGRESS;
+ }
+
+ DBG_DEBUG("breaking from %"PRIu32" to %"PRIu32" - "
+ "expected %"PRIu32"\n",
+ l->current_state,
+ new_lease_state,
+ l->breaking_to_requested);
+
+ l->breaking_to_requested = 0;
+ l->breaking_to_required = 0;
+ l->breaking = false;
+
+ d->modified = true;
+
+ return NT_STATUS_OK;
+}
+
+NTSTATUS downgrade_lease(struct smbXsrv_connection *xconn,
+ uint32_t num_file_ids,
+ const struct file_id *ids,
+ const struct smb2_lease_key *key,
+ uint32_t lease_state)
+{
+ struct smbd_server_connection *sconn = xconn->client->sconn;
+ struct share_mode_lock *lck;
+ struct share_mode_lease *l = NULL;
+ const struct file_id id = ids[0];
+ uint32_t i;
+ NTSTATUS status;
+
+ DEBUG(10, ("%s: Downgrading %s to %x\n", __func__,
+ file_id_string_tos(&id), (unsigned)lease_state));
+
+ lck = get_existing_share_mode_lock(talloc_tos(), id);
+ if (lck == NULL) {
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+ status = downgrade_share_lease(sconn, lck, key, lease_state, &l);
+
+ DEBUG(10, ("%s: Downgrading %s to %x => %s\n", __func__,
+ file_id_string_tos(&id), (unsigned)lease_state, nt_errstr(status)));
+
+ if (NT_STATUS_EQUAL(status, NT_STATUS_OPLOCK_BREAK_IN_PROGRESS)) {
+ struct downgrade_lease_additional_state *state;
+
+ state = talloc_zero(xconn,
+ struct downgrade_lease_additional_state);
+ if (state == NULL) {
+ TALLOC_FREE(lck);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ state->im = tevent_create_immediate(state);
+ if (state->im == NULL) {
+ TALLOC_FREE(state);
+ TALLOC_FREE(lck);
+ return NT_STATUS_NO_MEMORY;
+ }
+
+ state->xconn = xconn;
+ state->lease_key = l->lease_key;
+ state->break_from = l->current_state;
+ state->break_to = l->breaking_to_requested;
+ if (l->lease_version > 1) {
+ state->new_epoch = l->epoch;
+ }
+
+ if (l->current_state & (~SMB2_LEASE_READ)) {
+ state->break_flags =
+ SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED;
+ } else {
+ /*
+ * This is an async break without
+ * SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED
+ *
+ * we need to store NONE state in the
+ * database.
+ */
+ l->current_state = 0;
+ l->breaking_to_requested = 0;
+ l->breaking_to_required = 0;
+ l->breaking = false;
+
+ lck->data->modified = true;
+ }
+
+ tevent_schedule_immediate(state->im,
+ xconn->client->raw_ev_ctx,
+ downgrade_lease_additional_trigger,
+ state);
+ }
+
+ {
+ struct downgrade_lease_fsps_state state = {
+ .id = id, .lck = lck, .key = key,
+ };
+
+ files_forall(sconn, downgrade_lease_fsps, &state);
+ }
+
+ TALLOC_FREE(lck);
+ DEBUG(10, ("%s: Downgrading %s to %x => %s\n", __func__,
+ file_id_string_tos(&id), (unsigned)lease_state, nt_errstr(status)));
+
+ /*
+ * Dynamic share case. Ensure other opens are copies.
+ * This will only be breaking to NONE.
+ */
+
+ for (i = 1; i < num_file_ids; i++) {
+ lck = get_existing_share_mode_lock(talloc_tos(), ids[i]);
+ if (lck == NULL) {
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ {
+ struct downgrade_lease_fsps_state state = {
+ .id = ids[i], .lck = lck, .key = key,
+ };
+
+ files_forall(sconn, downgrade_lease_fsps, &state);
+ }
+
+ DEBUG(10, ("%s: Downgrading %s to %x => %s\n", __func__,
+ file_id_string_tos(&ids[i]), (unsigned)lease_state, nt_errstr(status)));
+
+ TALLOC_FREE(lck);
+ }
+
+ return status;
+}
+/****************************************************************************
+ Set up an oplock break message.
+****************************************************************************/
+
+#define SMB1_BREAK_MESSAGE_LENGTH (smb_size + 8*2)
+
+static void new_break_message_smb1(files_struct *fsp, int cmd,
+ char result[SMB1_BREAK_MESSAGE_LENGTH])
+{
memset(result,'\0',smb_size);
srv_set_message(result,8,0,true);
SCVAL(result,smb_com,SMBlockingX);
SSVAL(result,smb_vwv2,fsp->fnum);
SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
SCVAL(result,smb_vwv3+1,cmd);
- return result;
}
/****************************************************************************
{
files_struct *fsp = NULL;
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "initial_break_processing: called for %s/%u\n",
- file_id_string_tos(&id), (int)file_id);
- dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
- exclusive_oplocks_open, level_II_oplocks_open );
- }
+ DEBUG(3, ("initial_break_processing: called for %s/%u\n"
+ "Current oplocks_open (exclusive = %d, levelII = %d)\n",
+ file_id_string_tos(&id), (int)file_id,
+ sconn->oplocks.exclusive_open,
+ sconn->oplocks.level_II_open));
/*
* We need to search the file open table for the
if(fsp == NULL) {
/* The file could have been closed in the meantime - return success. */
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "initial_break_processing: cannot find open file with " );
- dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id), file_id);
- dbgtext( "allowing break to succeed.\n" );
- }
+ DEBUG(3, ("initial_break_processing: cannot find open file "
+ "with file_id %s gen_id = %lu, allowing break to "
+ "succeed.\n", file_id_string_tos(&id), file_id));
return NULL;
}
*/
if(fsp->oplock_type == NO_OPLOCK) {
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "initial_break_processing: file %s ",
- fsp_str_dbg(fsp));
- dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
- file_id_string_tos(&id), fsp->fh->gen_id );
- dbgtext( "Allowing break to succeed regardless.\n" );
- }
+ DEBUG(3, ("initial_break_processing: file %s (file_id = %s "
+ "gen_id = %lu) has no oplock. Allowing break to "
+ "succeed regardless.\n", fsp_str_dbg(fsp),
+ file_id_string_tos(&id), fsp->fh->gen_id));
return NULL;
}
return fsp;
}
-static void oplock_timeout_handler(struct event_context *ctx,
- struct timed_event *te,
+static void oplock_timeout_handler(struct tevent_context *ctx,
+ struct tevent_timer *te,
struct timeval now,
void *private_data)
{
files_struct *fsp = (files_struct *)private_data;
+ /*
+ * Note this function doesn't run under any specific impersonation and
+ * is not expected to call any SMB_VFS operation!
+ */
+
+ SMB_ASSERT(fsp->sent_oplock_break != NO_BREAK_SENT);
+
/* Remove the timed event handler. */
TALLOC_FREE(fsp->oplock_timeout);
DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n",
fsp_str_dbg(fsp)));
remove_oplock(fsp);
- reply_to_oplock_break_requests(fsp);
}
/*******************************************************************
static void add_oplock_timeout_handler(files_struct *fsp)
{
- /*
- * If kernel oplocks already notifies smbds when an oplock break times
- * out, just return.
- */
- if (koplocks &&
- (koplocks->flags & KOPLOCKS_TIMEOUT_NOTIFICATION)) {
- return;
- }
-
if (fsp->oplock_timeout != NULL) {
DEBUG(0, ("Logic problem -- have an oplock event hanging "
"around\n"));
}
+ /*
+ * For now we keep the logic and use the
+ * raw event context. We're called from
+ * the messaging system from a raw event context.
+ * Also oplock_timeout_handler doesn't invoke
+ * SMB_VFS calls.
+ */
fsp->oplock_timeout =
- tevent_add_timer(fsp->conn->sconn->ev_ctx, fsp,
+ tevent_add_timer(fsp->conn->sconn->raw_ev_ctx, fsp,
timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
oplock_timeout_handler, fsp);
static void send_break_message_smb1(files_struct *fsp, int level)
{
- char *break_msg = new_break_message_smb1(talloc_tos(),
- fsp,
- level);
- if (break_msg == NULL) {
- exit_server("Could not talloc break_msg\n");
- }
+ struct smbXsrv_connection *xconn = NULL;
+ char break_msg[SMB1_BREAK_MESSAGE_LENGTH];
+
+ /*
+ * For SMB1 we only have one connection
+ */
+ xconn = fsp->conn->sconn->client->connections;
+
+ new_break_message_smb1(fsp, level, break_msg);
show_msg(break_msg);
- if (!srv_send_smb(fsp->conn->sconn,
+ if (!srv_send_smb(xconn,
break_msg, false, 0,
IS_CONN_ENCRYPTED(fsp->conn),
NULL)) {
exit_server_cleanly("send_break_message_smb1: "
"srv_send_smb failed.");
}
-
- TALLOC_FREE(break_msg);
-}
-
-void break_level2_to_none_async(files_struct *fsp)
-{
- struct smbd_server_connection *sconn = fsp->conn->sconn;
-
- if (fsp->oplock_type == NO_OPLOCK) {
- /* We already got a "break to none" message and we've handled
- * it. just ignore. */
- DEBUG(3, ("process_oplock_async_level2_break_message: already "
- "broken to none, ignoring.\n"));
- return;
- }
-
- if (fsp->oplock_type == FAKE_LEVEL_II_OPLOCK) {
- /* Don't tell the client, just downgrade. */
- DEBUG(3, ("process_oplock_async_level2_break_message: "
- "downgrading fake level 2 oplock.\n"));
- remove_oplock(fsp);
- return;
- }
-
- /* Ensure we're really at level2 state. */
- SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
-
- DEBUG(10,("process_oplock_async_level2_break_message: sending break "
- "to none message for fid %d, file %s\n", fsp->fnum,
- fsp_str_dbg(fsp)));
-
- /* Now send a break to none message to our client. */
- if (sconn->using_smb2) {
- send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
- } else {
- send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
- }
-
- /* Async level2 request, don't send a reply, just remove the oplock. */
- remove_oplock(fsp);
}
/*******************************************************************
- This handles the case of a write triggering a break to none
- message on a level2 oplock.
- When we get this message we may be in any of three states :
- NO_OPLOCK, LEVEL_II, FAKE_LEVEL2. We only send a message to
- the client for LEVEL2.
+ This handles the generic oplock break message from another smbd.
*******************************************************************/
-static void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
- void *private_data,
- uint32_t msg_type,
- struct server_id src,
- DATA_BLOB *data)
+static void process_oplock_break_message(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id src,
+ DATA_BLOB *data)
{
+ struct file_id id;
struct share_mode_entry msg;
files_struct *fsp;
+ bool use_kernel;
struct smbd_server_connection *sconn =
talloc_get_type_abort(private_data,
struct smbd_server_connection);
+ struct server_id self = messaging_server_id(sconn->msg_ctx);
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+ uint16_t break_from;
+ uint16_t break_to;
+ bool break_needed = true;
+ struct server_id_buf tmp;
if (data->data == NULL) {
DEBUG(0, ("Got NULL buffer\n"));
}
/* De-linearize incoming message. */
- message_to_share_mode_entry(&msg, (char *)data->data);
+ message_to_share_mode_entry(&id, &msg, (char *)data->data);
+ break_to = msg.op_type;
- DEBUG(10, ("Got oplock async level 2 break message from pid %s: "
- "%s/%llu\n", server_id_str(talloc_tos(), &src),
- file_id_string_tos(&msg.id),
+ DEBUG(10, ("Got oplock break to %u message from pid %s: %s/%llu\n",
+ (unsigned)break_to, server_id_str_buf(src, &tmp),
+ file_id_string_tos(&id),
(unsigned long long)msg.share_file_id));
- fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
+ fsp = initial_break_processing(sconn, id, msg.share_file_id);
if (fsp == NULL) {
/* We hit a race here. Break messages are sent, and before we
- * get to process this message, we have closed the file.
- * No need to reply as this is an async message. */
- DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
+ * get to process this message, we have closed the file. */
+ DEBUG(3, ("Did not find fsp\n"));
return;
}
- break_level2_to_none_async(fsp);
-}
+ break_from = fsp_lease_type(fsp);
-/*******************************************************************
- This handles the generic oplock break message from another smbd.
-*******************************************************************/
-
-static void process_oplock_break_message(struct messaging_context *msg_ctx,
- void *private_data,
- uint32_t msg_type,
- struct server_id src,
- DATA_BLOB *data)
-{
- struct share_mode_entry msg;
- files_struct *fsp;
- bool break_to_level2 = False;
- struct smbd_server_connection *sconn =
- talloc_get_type_abort(private_data,
- struct smbd_server_connection);
+ if (fsp->oplock_type != LEASE_OPLOCK) {
+ if (fsp->sent_oplock_break != NO_BREAK_SENT) {
+ /*
+ * Nothing to do anymore
+ */
+ DEBUG(10, ("fsp->sent_oplock_break = %d\n",
+ fsp->sent_oplock_break));
+ return;
+ }
+ }
- if (data->data == NULL) {
- DEBUG(0, ("Got NULL buffer\n"));
- return;
+ if (!(global_client_caps & CAP_LEVEL_II_OPLOCKS)) {
+ DEBUG(10, ("client_caps without level2 oplocks\n"));
+ break_to &= ~SMB2_LEASE_READ;
}
- if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
- DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
- return;
+ use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) &&
+ (koplocks != NULL);
+ if (use_kernel) {
+ DEBUG(10, ("Kernel oplocks don't allow level2\n"));
+ break_to &= ~SMB2_LEASE_READ;
}
- /* De-linearize incoming message. */
- message_to_share_mode_entry(&msg, (char *)data->data);
+ if (!lp_level2_oplocks(SNUM(fsp->conn))) {
+ DEBUG(10, ("no level2 oplocks by config\n"));
+ break_to &= ~SMB2_LEASE_READ;
+ }
- DEBUG(10, ("Got oplock break message from pid %s: %s/%llu\n",
- server_id_str(talloc_tos(), &src),
- file_id_string_tos(&msg.id),
- (unsigned long long)msg.share_file_id));
+ if (fsp->oplock_type == LEASE_OPLOCK) {
+ struct share_mode_lock *lck;
+ int idx;
+
+ lck = get_existing_share_mode_lock(
+ talloc_tos(), fsp->file_id);
+ if (lck == NULL) {
+ /*
+ * We hit a race here. Break messages are sent, and
+ * before we get to process this message, we have closed
+ * the file.
+ */
+ DEBUG(3, ("Did not find share_mode\n"));
+ return;
+ }
- fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
+ idx = find_share_mode_lease(
+ lck->data,
+ fsp_client_guid(fsp),
+ &fsp->lease->lease.lease_key);
+ if (idx != -1) {
+ struct share_mode_lease *l;
+ l = &lck->data->leases[idx];
+
+ break_from = l->current_state;
+ break_to &= l->current_state;
+
+ if (l->breaking) {
+ break_to &= l->breaking_to_required;
+ if (l->breaking_to_required != break_to) {
+ /*
+ * Note we don't increment the epoch
+ * here, which might be a bug in
+ * Windows too...
+ */
+ l->breaking_to_required = break_to;
+ lck->data->modified = true;
+ }
+ break_needed = false;
+ } else if (l->current_state == break_to) {
+ break_needed = false;
+ } else if (l->current_state == SMB2_LEASE_READ) {
+ l->current_state = SMB2_LEASE_NONE;
+ /* Need to increment the epoch */
+ l->epoch += 1;
+ lck->data->modified = true;
+ } else {
+ l->breaking = true;
+ l->breaking_to_required = break_to;
+ l->breaking_to_requested = break_to;
+ /* Need to increment the epoch */
+ l->epoch += 1;
+ lck->data->modified = true;
+ }
- if (fsp == NULL) {
- /* We hit a race here. Break messages are sent, and before we
- * get to process this message, we have closed the file. Reply
- * with 'ok, oplock broken' */
- DEBUG(3, ("Did not find fsp\n"));
+ /* Ensure we're in sync with current lease state. */
+ fsp_lease_update(lck, fsp_client_guid(fsp), fsp->lease);
+ }
- /* We just send the same message back. */
- messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
- (uint8 *)data->data,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
- return;
+ TALLOC_FREE(lck);
}
- if (fsp->sent_oplock_break != NO_BREAK_SENT) {
- /* Remember we have to inform the requesting PID when the
- * client replies */
- msg.pid = src;
- ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
- &fsp->pending_break_messages,
- &fsp->num_pending_break_messages);
+ if (!break_needed) {
+ DEBUG(10,("%s: skip break\n", __func__));
return;
}
- if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
- !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- DEBUG(3, ("Already downgraded oplock on %s: %s\n",
+ if ((break_from == SMB2_LEASE_NONE) && !break_needed) {
+ DEBUG(3, ("Already downgraded oplock to none on %s: %s\n",
file_id_string_tos(&fsp->file_id),
fsp_str_dbg(fsp)));
- /* We just send the same message back. */
- messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
- (uint8 *)data->data,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
return;
}
- if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
- !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
- !(koplocks && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
- lp_level2_oplocks(SNUM(fsp->conn))) {
- break_to_level2 = True;
+ DEBUG(10, ("break_from=%u, break_to=%u\n",
+ (unsigned)break_from, (unsigned)break_to));
+
+ if ((break_from == break_to) && !break_needed) {
+ DEBUG(3, ("Already downgraded oplock to %u on %s: %s\n",
+ (unsigned)break_to,
+ file_id_string_tos(&fsp->file_id),
+ fsp_str_dbg(fsp)));
+ return;
}
/* Need to wait before sending a break
message if we sent ourselves this message. */
- if (procid_is_me(&src)) {
+ if (serverid_equal(&self, &src)) {
wait_before_sending_break();
}
if (sconn->using_smb2) {
- send_break_message_smb2(fsp, break_to_level2 ?
- OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
+ send_break_message_smb2(fsp, break_from, break_to);
} else {
- send_break_message_smb1(fsp, break_to_level2 ?
- OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
+ send_break_message_smb1(fsp, (break_to & SMB2_LEASE_READ) ?
+ OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
}
- fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
+ if ((break_from == SMB2_LEASE_READ) &&
+ (break_to == SMB2_LEASE_NONE)) {
+ /*
+ * This is an async break without a reply and thus no timeout
+ *
+ * leases are handled above.
+ */
+ if (fsp->oplock_type != LEASE_OPLOCK) {
+ remove_oplock(fsp);
+ }
+ return;
+ }
+ if (fsp->oplock_type == LEASE_OPLOCK) {
+ return;
+ }
- msg.pid = src;
- ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
- &fsp->pending_break_messages,
- &fsp->num_pending_break_messages);
+ fsp->sent_oplock_break = (break_to & SMB2_LEASE_READ) ?
+ LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
add_oplock_timeout_handler(fsp);
}
struct smbd_server_connection *sconn =
talloc_get_type_abort(private_data,
struct smbd_server_connection);
+ struct server_id_buf tmp;
if (data->data == NULL) {
DEBUG(0, ("Got NULL buffer\n"));
file_id = (unsigned long)IVAL(data->data, 24);
DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n",
- server_id_str(talloc_tos(), &src), file_id_string_tos(&id),
+ server_id_str_buf(src, &tmp), file_id_string_tos(&id),
(unsigned int)file_id));
fsp = initial_break_processing(sconn, id, file_id);
}
if (sconn->using_smb2) {
- send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
+ send_break_message_smb2(fsp, 0, OPLOCKLEVEL_NONE);
} else {
send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
}
add_oplock_timeout_handler(fsp);
}
-void reply_to_oplock_break_requests(files_struct *fsp)
+static bool file_has_read_oplocks(struct files_struct *fsp)
{
- int i;
+ struct byte_range_lock *brl;
+ uint32_t num_read_oplocks = 0;
- /*
- * If kernel oplocks already notifies smbds when oplocks are
- * broken/removed, just return.
- */
- if (koplocks &&
- (koplocks->flags & KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION)) {
- return;
+ brl = brl_get_locks_readonly(fsp);
+ if (brl == NULL) {
+ return false;
}
- for (i=0; i<fsp->num_pending_break_messages; i++) {
- struct share_mode_entry *e = &fsp->pending_break_messages[i];
- char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
+ num_read_oplocks = brl_num_read_oplocks(brl);
- share_mode_entry_to_message(msg, e);
+ DBG_DEBUG("num_read_oplocks = %"PRIu32"\n", num_read_oplocks);
- messaging_send_buf(fsp->conn->sconn->msg_ctx, e->pid,
- MSG_SMB_BREAK_RESPONSE,
- (uint8 *)msg,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
- }
-
- SAFE_FREE(fsp->pending_break_messages);
- fsp->num_pending_break_messages = 0;
- if (fsp->oplock_timeout != NULL) {
- /* Remove the timed event handler. */
- TALLOC_FREE(fsp->oplock_timeout);
- fsp->oplock_timeout = NULL;
- }
- return;
-}
-
-static void process_oplock_break_response(struct messaging_context *msg_ctx,
- void *private_data,
- uint32_t msg_type,
- struct server_id src,
- DATA_BLOB *data)
-{
- struct share_mode_entry msg;
- struct smbd_server_connection *sconn =
- talloc_get_type_abort(private_data,
- struct smbd_server_connection);
-
- if (data->data == NULL) {
- DEBUG(0, ("Got NULL buffer\n"));
- return;
- }
-
- if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
- DEBUG(0, ("Got invalid msg len %u\n",
- (unsigned int)data->length));
- return;
- }
-
- /* De-linearize incoming message. */
- message_to_share_mode_entry(&msg, (char *)data->data);
-
- DEBUG(10, ("Got oplock break response from pid %s: %s/%llu mid %llu\n",
- server_id_str(talloc_tos(), &src),
- file_id_string_tos(&msg.id),
- (unsigned long long)msg.share_file_id,
- (unsigned long long)msg.op_mid));
-
- schedule_deferred_open_message_smb(sconn, msg.op_mid);
-}
-
-static void process_open_retry_message(struct messaging_context *msg_ctx,
- void *private_data,
- uint32_t msg_type,
- struct server_id src,
- DATA_BLOB *data)
-{
- struct share_mode_entry msg;
- struct smbd_server_connection *sconn =
- talloc_get_type_abort(private_data,
- struct smbd_server_connection);
-
- if (data->data == NULL) {
- DEBUG(0, ("Got NULL buffer\n"));
- return;
- }
-
- if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
- DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
- return;
- }
-
- /* De-linearize incoming message. */
- message_to_share_mode_entry(&msg, (char *)data->data);
-
- DEBUG(10, ("Got open retry msg from pid %s: %s mid %llu\n",
- server_id_str(talloc_tos(), &src), file_id_string_tos(&msg.id),
- (unsigned long long)msg.op_mid));
-
- schedule_deferred_open_message_smb(sconn, msg.op_mid);
+ return (num_read_oplocks != 0);
}
struct break_to_none_state {
struct smbd_server_connection *sconn;
struct file_id id;
+ struct smb2_lease_key lease_key;
+ struct GUID client_guid;
};
-static void do_break_to_none(struct tevent_req *req);
+static void do_break_to_none(struct tevent_context *ctx,
+ struct tevent_immediate *im,
+ void *private_data);
/****************************************************************************
This function is called on any file modification or lock request. If a file
enum level2_contention_type type)
{
struct smbd_server_connection *sconn = fsp->conn->sconn;
- struct tevent_req *req;
+ struct tevent_immediate *im;
struct break_to_none_state *state;
+ bool has_read_oplocks;
/*
* If this file is level II oplocked then we need
* the shared memory area whilst doing this.
*/
- if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
+ if (fsp_lease_type_is_exclusive(fsp)) {
+ /*
+ * There can't be any level2 oplocks, we're alone.
+ */
return;
+ }
+
+ has_read_oplocks = file_has_read_oplocks(fsp);
+ if (!has_read_oplocks) {
+ DEBUG(10, ("No read oplocks around\n"));
+ return;
+ }
/*
* When we get here we might have a brlock entry locked. Also
* locking the share mode entry would violate the locking
* order. Breaking level2 oplocks to none is asynchronous
- * anyway, so we postpone this into an immediate timed event.
+ * anyway, so we postpone this into an immediate event.
*/
- state = talloc(sconn, struct break_to_none_state);
+ state = talloc_zero(sconn, struct break_to_none_state);
if (state == NULL) {
DEBUG(1, ("talloc failed\n"));
return;
state->sconn = sconn;
state->id = fsp->file_id;
- req = tevent_wakeup_send(state, sconn->ev_ctx, timeval_set(0, 0));
- if (req == NULL) {
- DEBUG(1, ("tevent_wakeup_send failed\n"));
+ if (fsp->oplock_type == LEASE_OPLOCK) {
+ state->client_guid = *fsp_client_guid(fsp);
+ state->lease_key = fsp->lease->lease.lease_key;
+ DEBUG(10, ("Breaking through lease key %"PRIu64"/%"PRIu64"\n",
+ state->lease_key.data[0],
+ state->lease_key.data[1]));
+ }
+
+ im = tevent_create_immediate(state);
+ if (im == NULL) {
+ DEBUG(1, ("tevent_create_immediate failed\n"));
TALLOC_FREE(state);
return;
}
- tevent_req_set_callback(req, do_break_to_none, state);
- return;
+
+ /*
+ * do_break_to_none() only operates on the
+ * locking.tdb and sends network packets to
+ * the client. That doesn't require any
+ * impersonation, so we just use the
+ * raw tevent context here.
+ */
+ tevent_schedule_immediate(im, sconn->raw_ev_ctx, do_break_to_none, state);
}
-static void do_break_to_none(struct tevent_req *req)
+static void send_break_to_none(struct messaging_context *msg_ctx,
+ const struct file_id *id,
+ const struct share_mode_entry *e)
{
- struct break_to_none_state *state = tevent_req_callback_data(
- req, struct break_to_none_state);
- bool ret;
- int i;
+ char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
+
+ share_mode_entry_to_message(msg, id, e);
+ /* Overload entry->op_type */
+ SSVAL(msg, OP_BREAK_MSG_OP_TYPE_OFFSET, NO_OPLOCK);
+
+ messaging_send_buf(msg_ctx, e->pid, MSG_SMB_BREAK_REQUEST,
+ (uint8_t *)msg, sizeof(msg));
+}
+
+static void do_break_to_none(struct tevent_context *ctx,
+ struct tevent_immediate *im,
+ void *private_data)
+{
+ struct break_to_none_state *state = talloc_get_type_abort(
+ private_data, struct break_to_none_state);
+ uint32_t i;
struct share_mode_lock *lck;
+ struct share_mode_data *d;
+
+ /*
+ * Note this function doesn't run under any specific impersonation and
+ * is not expected to call any SMB_VFS operation!
+ */
- ret = tevent_wakeup_recv(req);
- TALLOC_FREE(req);
- if (!ret) {
- DEBUG(1, ("tevent_wakeup_recv failed\n"));
- goto done;
- }
lck = get_existing_share_mode_lock(talloc_tos(), state->id);
if (lck == NULL) {
- DEBUG(1, ("release_level_2_oplocks_on_change: failed to lock "
- "share mode entry for file %s.\n",
- file_id_string_tos(&state->id)));
+ DEBUG(1, ("%s: failed to lock share mode entry for file %s.\n",
+ __func__, file_id_string_tos(&state->id)));
goto done;
}
+ d = lck->data;
- DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
- lck->data->num_share_modes ));
+ /*
+ * Walk leases and oplocks separately: We have to send one break per
+ * lease. If we have multiple share_mode_entry having a common lease,
+ * we would break the lease twice if we don't walk the leases list
+ * separately.
+ */
- for(i = 0; i < lck->data->num_share_modes; i++) {
- struct share_mode_entry *share_entry = &lck->data->share_modes[i];
- char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
+ for (i=0; i<d->num_leases; i++) {
+ struct share_mode_lease *l = &d->leases[i];
+ struct share_mode_entry *e = NULL;
+ uint32_t j;
- if (!is_valid_share_mode_entry(share_entry)) {
+ if ((l->current_state & SMB2_LEASE_READ) == 0) {
+ continue;
+ }
+ if (smb2_lease_equal(&state->client_guid,
+ &state->lease_key,
+ &l->client_guid,
+ &l->lease_key)) {
+ DEBUG(10, ("Don't break our own lease\n"));
+ continue;
+ }
+
+ for (j=0; j<d->num_share_modes; j++) {
+ e = &d->share_modes[j];
+
+ if (!is_valid_share_mode_entry(e)) {
+ continue;
+ }
+ if (e->lease_idx == i) {
+ break;
+ }
+ }
+ if (j == d->num_share_modes) {
+ DEBUG(0, ("leases[%"PRIu32"] has no share mode\n",
+ i));
+ continue;
+ }
+
+ DEBUG(10, ("Breaking lease# %"PRIu32" with share_entry# "
+ "%"PRIu32"\n", i, j));
+
+ send_break_to_none(state->sconn->msg_ctx, &state->id, e);
+ }
+
+ for(i = 0; i < d->num_share_modes; i++) {
+ struct share_mode_entry *e = &d->share_modes[i];
+
+ if (!is_valid_share_mode_entry(e)) {
+ continue;
+ }
+ if (e->op_type == LEASE_OPLOCK) {
+ /*
+ * Took care of those in the loop above
+ */
continue;
}
* As there could have been multiple writes waiting at the
* lock_share_entry gate we may not be the first to
* enter. Hence the state of the op_types in the share mode
- * entries may be partly NO_OPLOCK and partly LEVEL_II or FAKE_LEVEL_II
+ * entries may be partly NO_OPLOCK and partly LEVEL_II
* oplock. It will do no harm to re-send break messages to
* those smbd's that are still waiting their turn to remove
* their LEVEL_II state, and also no harm to ignore existing
* NO_OPLOCK states. JRA.
*/
- DEBUG(10,("release_level_2_oplocks_on_change: "
- "share_entry[%i]->op_type == %d\n",
- i, share_entry->op_type ));
+ DEBUG(10, ("%s: share_entry[%i]->op_type == %d\n", __func__,
+ i, e->op_type ));
- if (share_entry->op_type == NO_OPLOCK) {
+ if (e->op_type == NO_OPLOCK) {
continue;
}
/* Paranoia .... */
- if (EXCLUSIVE_OPLOCK_TYPE(share_entry->op_type)) {
- DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
- "share mode entry %d is an exlusive "
- "oplock !\n", i ));
+ if (EXCLUSIVE_OPLOCK_TYPE(e->op_type)) {
+ DEBUG(0,("%s: PANIC. "
+ "share mode entry %d is an exclusive "
+ "oplock !\n", __func__, i ));
TALLOC_FREE(lck);
abort();
}
- share_mode_entry_to_message(msg, share_entry);
-
- /*
- * Deal with a race condition when breaking level2
- * oplocks. Don't send all the messages and release
- * the lock, this allows someone else to come in and
- * get a level2 lock before any of the messages are
- * processed, and thus miss getting a break message.
- * Ensure at least one entry (the one we're breaking)
- * is processed immediately under the lock and becomes
- * set as NO_OPLOCK to stop any waiter getting a level2.
- * Bugid #5980.
- */
-
- if (procid_is_me(&share_entry->pid)) {
- struct files_struct *cur_fsp =
- initial_break_processing(state->sconn,
- share_entry->id,
- share_entry->share_file_id);
- wait_before_sending_break();
- if (cur_fsp != NULL) {
- break_level2_to_none_async(cur_fsp);
- } else {
- DEBUG(3, ("release_level_2_oplocks_on_change: "
- "Did not find fsp, ignoring\n"));
- }
- } else {
- messaging_send_buf(state->sconn->msg_ctx,
- share_entry->pid,
- MSG_SMB_ASYNC_LEVEL2_BREAK,
- (uint8 *)msg,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
- }
+ send_break_to_none(state->sconn->msg_ctx, &state->id, e);
}
/* We let the message receivers handle removing the oplock state
void smbd_contend_level2_oplocks_begin(files_struct *fsp,
enum level2_contention_type type)
{
- if (koplocks && koplocks->ops->contend_level2_oplocks_begin) {
- koplocks->ops->contend_level2_oplocks_begin(fsp, type);
- return;
- }
-
contend_level2_oplocks_begin_default(fsp, type);
}
void smbd_contend_level2_oplocks_end(files_struct *fsp,
enum level2_contention_type type)
{
- /* Only kernel oplocks implement this so far */
- if (koplocks && koplocks->ops->contend_level2_oplocks_end) {
- koplocks->ops->contend_level2_oplocks_end(fsp, type);
- }
+ return;
}
/****************************************************************************
Linearize a share mode entry struct to an internal oplock break message.
****************************************************************************/
-void share_mode_entry_to_message(char *msg, const struct share_mode_entry *e)
+void share_mode_entry_to_message(char *msg, const struct file_id *id,
+ const struct share_mode_entry *e)
{
- SIVAL(msg,OP_BREAK_MSG_PID_OFFSET,(uint32)e->pid.pid);
+ SIVAL(msg,OP_BREAK_MSG_PID_OFFSET,(uint32_t)e->pid.pid);
SBVAL(msg,OP_BREAK_MSG_MID_OFFSET,e->op_mid);
SSVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET,e->op_type);
SIVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET,e->access_mask);
SIVAL(msg,OP_BREAK_MSG_PRIV_OFFSET,e->private_options);
SIVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET,(uint32_t)e->time.tv_sec);
SIVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET,(uint32_t)e->time.tv_usec);
- push_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id);
+ /*
+ * "id" used to be part of share_mode_entry, thus the strange
+ * place to put this. Feel free to move somewhere else :-)
+ */
+ push_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, id);
SIVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET,e->share_file_id);
SIVAL(msg,OP_BREAK_MSG_UID_OFFSET,e->uid);
SSVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET,e->flags);
De-linearize an internal oplock break message to a share mode entry struct.
****************************************************************************/
-void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
+void message_to_share_mode_entry(struct file_id *id,
+ struct share_mode_entry *e,
+ const char *msg)
{
e->pid.pid = (pid_t)IVAL(msg,OP_BREAK_MSG_PID_OFFSET);
e->op_mid = BVAL(msg,OP_BREAK_MSG_MID_OFFSET);
e->private_options = IVAL(msg,OP_BREAK_MSG_PRIV_OFFSET);
e->time.tv_sec = (time_t)IVAL(msg,OP_BREAK_MSG_TIME_SEC_OFFSET);
e->time.tv_usec = (int)IVAL(msg,OP_BREAK_MSG_TIME_USEC_OFFSET);
- pull_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, &e->id);
+ /*
+ * "id" used to be part of share_mode_entry, thus the strange
+ * place to put this. Feel free to move somewhere else :-)
+ */
+ pull_file_id_24(msg+OP_BREAK_MSG_DEV_OFFSET, id);
e->share_file_id = (unsigned long)IVAL(msg,OP_BREAK_MSG_FILE_ID_OFFSET);
- e->uid = (uint32)IVAL(msg,OP_BREAK_MSG_UID_OFFSET);
- e->flags = (uint16)SVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET);
+ e->uid = (uint32_t)IVAL(msg,OP_BREAK_MSG_UID_OFFSET);
+ e->flags = (uint16_t)SVAL(msg,OP_BREAK_MSG_FLAGS_OFFSET);
e->name_hash = IVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET);
e->pid.vnn = IVAL(msg,OP_BREAK_MSG_VNN_OFFSET);
}
messaging_register(sconn->msg_ctx, sconn, MSG_SMB_BREAK_REQUEST,
process_oplock_break_message);
- messaging_register(sconn->msg_ctx, sconn, MSG_SMB_ASYNC_LEVEL2_BREAK,
- process_oplock_async_level2_break_message);
- messaging_register(sconn->msg_ctx, sconn, MSG_SMB_BREAK_RESPONSE,
- process_oplock_break_response);
messaging_register(sconn->msg_ctx, sconn, MSG_SMB_KERNEL_BREAK,
process_kernel_oplock_break);
- messaging_register(sconn->msg_ctx, sconn, MSG_SMB_OPEN_RETRY,
- process_open_retry_message);
+ return true;
+}
- if (lp_kernel_oplocks(-1)) {
-#if HAVE_KERNEL_OPLOCKS_IRIX
- koplocks = irix_init_kernel_oplocks(sconn);
-#elif HAVE_KERNEL_OPLOCKS_LINUX
+void init_kernel_oplocks(struct smbd_server_connection *sconn)
+{
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
+ /* only initialize once */
+ if (koplocks == NULL) {
+#if HAVE_KERNEL_OPLOCKS_LINUX
koplocks = linux_init_kernel_oplocks(sconn);
-#elif HAVE_ONEFS
-#error Isilon, please check if the NULL context is okay here. Thanks!
- koplocks = onefs_init_kernel_oplocks(sconn);
#endif
+ sconn->oplocks.kernel_ops = koplocks;
}
-
- return True;
}
git.samba.org / samba.git / blobdiff