Copyright (C) Andrew Tridgell 1992-1998
Copyright (C) Jeremy Allison 1998 - 2001
Copyright (C) Volker Lendecke 2005
-
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
-
+
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
-
+
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#define DBGC_CLASS DBGC_LOCKING
#include "includes.h"
-
-/* Current number of oplocks we have outstanding. */
-static int32 exclusive_oplocks_open = 0;
-static int32 level_II_oplocks_open = 0;
-bool global_client_failed_oplock_break = False;
-
-extern uint32 global_client_caps;
-
-static struct kernel_oplocks *koplocks;
+#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.
return exclusive_oplocks_open;
}
-/****************************************************************************
- Return True if an oplock message is pending.
-****************************************************************************/
-
-bool oplock_message_waiting(fd_set *fds)
+/*
+ * helper function used by the kernel oplock backends to post the break message
+ */
+void break_kernel_oplock(struct messaging_context *msg_ctx, files_struct *fsp)
{
- if (koplocks && koplocks->msg_waiting(fds)) {
- return True;
- }
+ uint8_t msg[MSG_SMB_KERNEL_BREAK_SIZE];
- return False;
+ /* Put the kernel break info into the message. */
+ push_file_id_24((char *)msg, &fsp->file_id);
+ SIVAL(msg,24,fsp->fh->gen_id);
+
+ /* Don't need to be root here as we're only ever
+ sending to ourselves. */
+
+ messaging_send_buf(msg_ctx, messaging_server_id(msg_ctx),
+ MSG_SMB_KERNEL_BREAK,
+ msg, MSG_SMB_KERNEL_BREAK_SIZE);
}
/****************************************************************************
- Find out if there are any kernel oplock messages waiting and process them
- if so. pfds is the fd_set from the main select loop (which contains any
- kernel oplock fd if that's what the system uses (IRIX). If may be NULL if
- we're calling this in a shutting down state.
+ 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.
****************************************************************************/
-void process_kernel_oplocks(struct messaging_context *msg_ctx, fd_set *pfds)
+bool set_file_oplock(files_struct *fsp, int oplock_type)
{
- /*
- * We need to check for kernel oplocks before going into the select
- * here, as the EINTR generated by the linux kernel oplock may have
- * already been eaten. JRA.
- */
-
- if (!koplocks) {
- return;
- }
-
- while (koplocks->msg_waiting(pfds)) {
- files_struct *fsp;
- char msg[MSG_SMB_KERNEL_BREAK_SIZE];
- fsp = koplocks->receive_message(pfds);
+ bool use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
- if (fsp == NULL) {
- DEBUG(3, ("Kernel oplock message announced, but none "
- "received\n"));
- return;
+ if (fsp->oplock_type == LEVEL_II_OPLOCK) {
+ if (use_kernel &&
+ !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) {
+ DEBUG(10, ("Refusing level2 oplock, kernel oplocks "
+ "don't support them\n"));
+ return false;
}
-
- /* Put the kernel break info into the message. */
- push_file_id_16(msg, &fsp->file_id);
- SIVAL(msg,16,fsp->fh->gen_id);
-
- /* Don't need to be root here as we're only ever
- sending to ourselves. */
-
- messaging_send_buf(msg_ctx, procid_self(),
- MSG_SMB_KERNEL_BREAK,
- (uint8 *)&msg, MSG_SMB_KERNEL_BREAK_SIZE);
}
-}
-
-/****************************************************************************
- Attempt to set an oplock on a file. Always succeeds if kernel oplocks are
- disabled (just sets flags). Returns True if oplock set.
-****************************************************************************/
-bool set_file_oplock(files_struct *fsp, int oplock_type)
-{
if ((fsp->oplock_type != NO_OPLOCK) &&
(fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
- koplocks &&
- !koplocks->set_oplock(fsp, oplock_type)) {
+ use_kernel &&
+ !koplocks->ops->set_oplock(koplocks, fsp, oplock_type)) {
return False;
}
DEBUG(5,("set_file_oplock: granted oplock on file %s, %s/%lu, "
"tv_sec = %x, tv_usec = %x\n",
- fsp->fsp_name, file_id_string_tos(&fsp->file_id),
+ fsp_str_dbg(fsp), file_id_string_tos(&fsp->file_id),
fsp->fh->gen_id, (int)fsp->open_time.tv_sec,
(int)fsp->open_time.tv_usec ));
if ((fsp->oplock_type != NO_OPLOCK) &&
(fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
koplocks) {
- koplocks->release_oplock(fsp);
+ koplocks->ops->release_oplock(koplocks, fsp, NO_OPLOCK);
}
if (fsp->oplock_type == LEVEL_II_OPLOCK) {
fsp->sent_oplock_break = NO_BREAK_SENT;
flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
+ delete_write_cache(fsp);
TALLOC_FREE(fsp->oplock_timeout);
}
static void downgrade_file_oplock(files_struct *fsp)
{
+ if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
+ DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n"));
+ return;
+ }
+
if (koplocks) {
- koplocks->release_oplock(fsp);
+ koplocks->ops->release_oplock(koplocks, fsp, LEVEL_II_OPLOCK);
}
fsp->oplock_type = LEVEL_II_OPLOCK;
exclusive_oplocks_open--;
struct share_mode_lock *lck;
/* Remove the oplock flag from the sharemode. */
- lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
- NULL);
+ 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->fsp_name ));
+ "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->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
+ fsp_str_dbg(fsp), fsp->fnum,
+ file_id_string_tos(&fsp->file_id)));
}
release_file_oplock(fsp);
TALLOC_FREE(lck);
bool ret;
struct share_mode_lock *lck;
- lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
- NULL);
+ lck = get_existing_share_mode_lock(talloc_tos(), fsp->file_id);
if (lck == NULL) {
DEBUG(0,("downgrade_oplock: failed to lock share entry for "
- "file %s\n", fsp->fsp_name ));
+ "file %s\n", fsp_str_dbg(fsp)));
return False;
}
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->fsp_name, fsp->fnum, file_id_string_tos(&fsp->file_id)));
+ fsp_str_dbg(fsp), fsp->fnum,
+ file_id_string_tos(&fsp->file_id)));
}
downgrade_file_oplock(fsp);
return ret;
}
-/****************************************************************************
- Return the fd (if any) used for receiving oplock notifications.
-****************************************************************************/
-
-int oplock_notify_fd(void)
+/*
+ * Some kernel oplock implementations handle the notification themselves.
+ */
+bool should_notify_deferred_opens()
{
- if (koplocks) {
- return koplocks->notification_fd;
- }
-
- return -1;
+ return !(koplocks &&
+ (koplocks->flags & KOPLOCKS_DEFERRED_OPEN_NOTIFICATION));
}
/****************************************************************************
Set up an oplock break message.
****************************************************************************/
-static char *new_break_smb_message(TALLOC_CTX *mem_ctx,
- files_struct *fsp, uint8 cmd)
+static char *new_break_message_smb1(TALLOC_CTX *mem_ctx,
+ files_struct *fsp, int cmd)
{
- char *result = TALLOC_ARRAY(mem_ctx, char, smb_size + 8*2 + 0);
+ char *result = talloc_array(mem_ctx, char, smb_size + 8*2 + 0);
if (result == NULL) {
DEBUG(0, ("talloc failed\n"));
Ensure that we have a valid oplock.
****************************************************************************/
-static files_struct *initial_break_processing(struct file_id id, unsigned long file_id)
+static files_struct *initial_break_processing(
+ struct smbd_server_connection *sconn, struct file_id id,
+ unsigned long file_id)
{
files_struct *fsp = NULL;
* we have an oplock on it.
*/
- fsp = file_find_dif(id, file_id);
+ fsp = file_find_dif(sconn, id, file_id);
if(fsp == NULL) {
/* The file could have been closed in the meantime - return success. */
if(fsp->oplock_type == NO_OPLOCK) {
if( DEBUGLVL( 3 ) ) {
- dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
+ 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" );
static void oplock_timeout_handler(struct event_context *ctx,
struct timed_event *te,
- const struct timeval *now,
+ struct timeval now,
void *private_data)
{
files_struct *fsp = (files_struct *)private_data;
/* Remove the timed event handler. */
TALLOC_FREE(fsp->oplock_timeout);
- DEBUG(0, ("Oplock break failed for file %s -- replying anyway\n", fsp->fsp_name));
- global_client_failed_oplock_break = True;
+ 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"));
}
fsp->oplock_timeout =
- event_add_timed(smbd_event_context(), NULL,
- timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
- "oplock_timeout_handler",
- oplock_timeout_handler, fsp);
+ tevent_add_timer(fsp->conn->sconn->ev_ctx, fsp,
+ timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
+ oplock_timeout_handler, fsp);
if (fsp->oplock_timeout == NULL) {
DEBUG(0, ("Could not add oplock timeout handler\n"));
}
}
+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");
+ }
+
+ show_msg(break_msg);
+ if (!srv_send_smb(fsp->conn->sconn,
+ 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.
{
struct share_mode_entry msg;
files_struct *fsp;
- char *break_msg;
- bool sign_state;
+ 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"));
/* De-linearize incoming message. */
message_to_share_mode_entry(&msg, (char *)data->data);
- DEBUG(10, ("Got oplock async level 2 break message from pid %d: %s/%lu\n",
- (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id));
+ 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),
+ (unsigned long long)msg.share_file_id));
- fsp = initial_break_processing(msg.id, msg.share_file_id);
+ fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
if (fsp == NULL) {
/* We hit a race here. Break messages are sent, and before we
return;
}
- 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->fsp_name));
-
- /* Now send a break to none message to our client. */
-
- break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
- if (break_msg == NULL) {
- exit_server("Could not talloc break_msg\n");
- }
-
- /* Need to wait before sending a break message if we sent ourselves this message. */
- if (procid_to_pid(&src) == sys_getpid()) {
- wait_before_sending_break();
- }
-
- /* Save the server smb signing state. */
- sign_state = srv_oplock_set_signing(False);
-
- show_msg(break_msg);
- if (!srv_send_smb(smbd_server_fd(),
- break_msg,
- IS_CONN_ENCRYPTED(fsp->conn))) {
- exit_server_cleanly("oplock_break: srv_send_smb failed.");
- }
-
- /* Restore the sign state to what it was. */
- srv_oplock_set_signing(sign_state);
-
- TALLOC_FREE(break_msg);
-
- /* Async level2 request, don't send a reply, just remove the oplock. */
- remove_oplock(fsp);
+ break_level2_to_none_async(fsp);
}
/*******************************************************************
{
struct share_mode_entry msg;
files_struct *fsp;
- char *break_msg;
bool break_to_level2 = False;
- bool sign_state;
+ bool use_kernel;
+ 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"));
/* De-linearize incoming message. */
message_to_share_mode_entry(&msg, (char *)data->data);
- DEBUG(10, ("Got oplock break message from pid %d: %s/%lu\n",
- (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id));
+ 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));
- fsp = initial_break_processing(msg.id, msg.share_file_id);
+ fsp = initial_break_processing(sconn, msg.id, msg.share_file_id);
if (fsp == NULL) {
- /* a We hit race here. Break messages are sent, and before we
+ /* 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"));
!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
DEBUG(3, ("Already downgraded oplock on %s: %s\n",
file_id_string_tos(&fsp->file_id),
- fsp->fsp_name));
+ fsp_str_dbg(fsp)));
/* We just send the same message back. */
messaging_send_buf(msg_ctx, src, MSG_SMB_BREAK_RESPONSE,
(uint8 *)data->data,
return;
}
- if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
+ use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
+
+ if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
!(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
- !koplocks && /* NOTE: we force levelII off for kernel oplocks -
- * this will change when it is supported */
+ !(use_kernel && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
lp_level2_oplocks(SNUM(fsp->conn))) {
break_to_level2 = True;
}
- break_msg = new_break_smb_message(NULL, fsp, break_to_level2 ?
- OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
- if (break_msg == NULL) {
- exit_server("Could not talloc break_msg\n");
- }
-
- /* Need to wait before sending a break message if we sent ourselves this message. */
- if (procid_to_pid(&src) == sys_getpid()) {
+ /* Need to wait before sending a break
+ message if we sent ourselves this message. */
+ if (procid_is_me(&src)) {
wait_before_sending_break();
}
- /* Save the server smb signing state. */
- sign_state = srv_oplock_set_signing(False);
-
- show_msg(break_msg);
- if (!srv_send_smb(smbd_server_fd(),
- break_msg,
- IS_CONN_ENCRYPTED(fsp->conn))) {
- exit_server_cleanly("oplock_break: srv_send_smb failed.");
+ if (sconn->using_smb2) {
+ send_break_message_smb2(fsp, break_to_level2 ?
+ OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
+ } else {
+ send_break_message_smb1(fsp, break_to_level2 ?
+ OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
}
- /* Restore the sign state to what it was. */
- srv_oplock_set_signing(sign_state);
-
- TALLOC_FREE(break_msg);
-
fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
msg.pid = src;
struct file_id id;
unsigned long file_id;
files_struct *fsp;
- char *break_msg;
- bool sign_state;
+ 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"));
}
/* Pull the data from the message. */
- pull_file_id_16((char *)data->data, &id);
- file_id = (unsigned long)IVAL(data->data, 16);
+ pull_file_id_24((char *)data->data, &id);
+ file_id = (unsigned long)IVAL(data->data, 24);
- DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
- (int)procid_to_pid(&src), file_id_string_tos(&id),
+ DEBUG(10, ("Got kernel oplock break message from pid %s: %s/%u\n",
+ server_id_str(talloc_tos(), &src), file_id_string_tos(&id),
(unsigned int)file_id));
- fsp = initial_break_processing(id, file_id);
+ fsp = initial_break_processing(sconn, id, file_id);
if (fsp == NULL) {
DEBUG(3, ("Got a kernel oplock break message for a file "
return;
}
- break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
- if (break_msg == NULL) {
- exit_server("Could not talloc break_msg\n");
- }
-
- /* Save the server smb signing state. */
- sign_state = srv_oplock_set_signing(False);
-
- show_msg(break_msg);
- if (!srv_send_smb(smbd_server_fd(),
- break_msg,
- IS_CONN_ENCRYPTED(fsp->conn))) {
- exit_server_cleanly("oplock_break: srv_send_smb failed.");
+ if (sconn->using_smb2) {
+ send_break_message_smb2(fsp, OPLOCKLEVEL_NONE);
+ } else {
+ send_break_message_smb1(fsp, OPLOCKLEVEL_NONE);
}
- /* Restore the sign state to what it was. */
- srv_oplock_set_signing(sign_state);
-
- TALLOC_FREE(break_msg);
-
fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
add_oplock_timeout_handler(fsp);
{
int i;
+ /*
+ * If kernel oplocks already notifies smbds when oplocks are
+ * broken/removed, just return.
+ */
+ if (koplocks &&
+ (koplocks->flags & KOPLOCKS_OPLOCK_BROKEN_NOTIFICATION)) {
+ return;
+ }
+
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];
share_mode_entry_to_message(msg, e);
- messaging_send_buf(smbd_messaging_context(), e->pid,
+ 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;
- }
+ TALLOC_FREE(fsp->oplock_timeout);
return;
}
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"));
/* De-linearize incoming message. */
message_to_share_mode_entry(&msg, (char *)data->data);
- DEBUG(10, ("Got oplock break response from pid %d: %s/%lu mid %u\n",
- (int)procid_to_pid(&src), file_id_string_tos(&msg.id), msg.share_file_id,
- (unsigned int)msg.op_mid));
+ 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));
- /* Here's the hack from open.c, store the mid in the 'port' field */
- schedule_deferred_open_smb_message(msg.op_mid);
+ schedule_deferred_open_message_smb(sconn, msg.op_mid);
}
static void process_open_retry_message(struct messaging_context *msg_ctx,
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;
/* De-linearize incoming message. */
message_to_share_mode_entry(&msg, (char *)data->data);
- DEBUG(10, ("Got open retry msg from pid %d: %s mid %u\n",
- (int)procid_to_pid(&src), file_id_string_tos(&msg.id),
- (unsigned int)msg.op_mid));
+ 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_smb_message(msg.op_mid);
+ schedule_deferred_open_message_smb(sconn, msg.op_mid);
}
+struct break_to_none_state {
+ struct smbd_server_connection *sconn;
+ struct file_id id;
+};
+static void do_break_to_none(struct tevent_req *req);
+
/****************************************************************************
This function is called on any file modification or lock request. If a file
is level 2 oplocked then it must tell all other level 2 holders to break to
none.
****************************************************************************/
-void release_level_2_oplocks_on_change(files_struct *fsp)
+static void contend_level2_oplocks_begin_default(files_struct *fsp,
+ enum level2_contention_type type)
{
- int i;
- struct share_mode_lock *lck;
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct tevent_req *req;
+ struct break_to_none_state *state;
/*
* If this file is level II oplocked then we need
if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
return;
- lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
- NULL);
- if (lck == NULL) {
- DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
- "share mode entry for file %s.\n", fsp->fsp_name ));
+ /*
+ * 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.
+ */
+
+ state = talloc(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"));
+ TALLOC_FREE(state);
+ return;
+ }
+ tevent_req_set_callback(req, do_break_to_none, state);
+ return;
+}
+
+static void do_break_to_none(struct tevent_req *req)
+{
+ struct break_to_none_state *state = tevent_req_callback_data(
+ req, struct break_to_none_state);
+ bool ret;
+ int i;
+ struct share_mode_lock *lck;
+
+ 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)));
+ goto done;
+ }
DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
- lck->num_share_modes ));
+ lck->data->num_share_modes ));
- for(i = 0; i < lck->num_share_modes; i++) {
- struct share_mode_entry *share_entry = &lck->share_modes[i];
+ 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];
if (!is_valid_share_mode_entry(share_entry)) {
*/
if (procid_is_me(&share_entry->pid)) {
- DATA_BLOB blob = data_blob_const(msg,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
- process_oplock_async_level2_break_message(smbd_messaging_context(),
- NULL,
- MSG_SMB_ASYNC_LEVEL2_BREAK,
- share_entry->pid,
- &blob);
+ 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(smbd_messaging_context(),
+ messaging_send_buf(state->sconn->msg_ctx,
share_entry->pid,
MSG_SMB_ASYNC_LEVEL2_BREAK,
(uint8 *)msg,
in the share mode lock db. */
TALLOC_FREE(lck);
+done:
+ TALLOC_FREE(state);
+ return;
+}
+
+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);
+ }
}
/****************************************************************************
void share_mode_entry_to_message(char *msg, const struct share_mode_entry *e)
{
- SIVAL(msg,0,(uint32)e->pid.pid);
- SSVAL(msg,4,e->op_mid);
- SSVAL(msg,6,e->op_type);
- SIVAL(msg,8,e->access_mask);
- SIVAL(msg,12,e->share_access);
- SIVAL(msg,16,e->private_options);
- SIVAL(msg,20,(uint32)e->time.tv_sec);
- SIVAL(msg,24,(uint32)e->time.tv_usec);
- push_file_id_16(msg+28, &e->id);
- SIVAL(msg,44,e->share_file_id);
- SIVAL(msg,48,e->uid);
- SSVAL(msg,52,e->flags);
-#ifdef CLUSTER_SUPPORT
- SIVAL(msg,54,e->pid.vnn);
-#endif
+ SIVAL(msg,OP_BREAK_MSG_PID_OFFSET,(uint32)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_SHARE_ACCESS_OFFSET,e->share_access);
+ 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);
+ 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);
+ SIVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET,e->name_hash);
+ SIVAL(msg,OP_BREAK_MSG_VNN_OFFSET,e->pid.vnn);
}
/****************************************************************************
void message_to_share_mode_entry(struct share_mode_entry *e, char *msg)
{
- e->pid.pid = (pid_t)IVAL(msg,0);
- e->op_mid = SVAL(msg,4);
- e->op_type = SVAL(msg,6);
- e->access_mask = IVAL(msg,8);
- e->share_access = IVAL(msg,12);
- e->private_options = IVAL(msg,16);
- e->time.tv_sec = (time_t)IVAL(msg,20);
- e->time.tv_usec = (int)IVAL(msg,24);
- pull_file_id_16(msg+28, &e->id);
- e->share_file_id = (unsigned long)IVAL(msg,44);
- e->uid = (uint32)IVAL(msg,48);
- e->flags = (uint16)SVAL(msg,52);
-#ifdef CLUSTER_SUPPORT
- e->pid.vnn = IVAL(msg,54);
-#endif
+ e->pid.pid = (pid_t)IVAL(msg,OP_BREAK_MSG_PID_OFFSET);
+ e->op_mid = BVAL(msg,OP_BREAK_MSG_MID_OFFSET);
+ e->op_type = SVAL(msg,OP_BREAK_MSG_OP_TYPE_OFFSET);
+ e->access_mask = IVAL(msg,OP_BREAK_MSG_ACCESS_MASK_OFFSET);
+ e->share_access = IVAL(msg,OP_BREAK_MSG_SHARE_ACCESS_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);
+ 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->name_hash = IVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET);
+ e->pid.vnn = IVAL(msg,OP_BREAK_MSG_VNN_OFFSET);
}
/****************************************************************************
Setup oplocks for this process.
****************************************************************************/
-bool init_oplocks(struct messaging_context *msg_ctx)
+bool init_oplocks(struct smbd_server_connection *sconn)
{
DEBUG(3,("init_oplocks: initializing messages.\n"));
- messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_REQUEST,
+ messaging_register(sconn->msg_ctx, sconn, MSG_SMB_BREAK_REQUEST,
process_oplock_break_message);
- messaging_register(msg_ctx, NULL, MSG_SMB_ASYNC_LEVEL2_BREAK,
+ messaging_register(sconn->msg_ctx, sconn, MSG_SMB_ASYNC_LEVEL2_BREAK,
process_oplock_async_level2_break_message);
- messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_RESPONSE,
+ messaging_register(sconn->msg_ctx, sconn, MSG_SMB_BREAK_RESPONSE,
process_oplock_break_response);
- messaging_register(msg_ctx, NULL, MSG_SMB_KERNEL_BREAK,
+ messaging_register(sconn->msg_ctx, sconn, MSG_SMB_KERNEL_BREAK,
process_kernel_oplock_break);
- messaging_register(msg_ctx, NULL, MSG_SMB_OPEN_RETRY,
+ messaging_register(sconn->msg_ctx, sconn, MSG_SMB_OPEN_RETRY,
process_open_retry_message);
- if (lp_kernel_oplocks()) {
+ return true;
+}
+
+void init_kernel_oplocks(struct smbd_server_connection *sconn)
+{
+ /* only initialize once */
+ if (koplocks == NULL) {
#if HAVE_KERNEL_OPLOCKS_IRIX
- koplocks = irix_init_kernel_oplocks();
+ koplocks = irix_init_kernel_oplocks(sconn);
#elif HAVE_KERNEL_OPLOCKS_LINUX
- koplocks = linux_init_kernel_oplocks();
+ koplocks = linux_init_kernel_oplocks(sconn);
#endif
}
-
- return True;
}
git.samba.org / samba.git / blobdiff