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"
+#include "smbd/smbd.h"
#include "smbd/globals.h"
-#include "librpc/gen_ndr/messaging.h"
-
-/****************************************************************************
- Get the number of current exclusive oplocks.
-****************************************************************************/
-
-int32 get_number_of_exclusive_open_oplocks(void)
-{
- return exclusive_oplocks_open;
-}
+#include "messages.h"
+#include "../librpc/gen_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. Always succeeds if kernel oplocks are
- disabled (just sets flags). Returns True if oplock set.
+ Attempt to set an oplock on a file. Succeeds if kernel oplocks are
+ disabled (just sets flags).
****************************************************************************/
-bool set_file_oplock(files_struct *fsp, int oplock_type)
+NTSTATUS set_file_oplock(files_struct *fsp, int oplock_type)
{
- if ((fsp->oplock_type == LEVEL_II_OPLOCK)
- && 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;
+
+ 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 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, 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++;
+ 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;
}
/****************************************************************************
void release_file_oplock(files_struct *fsp)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
if ((fsp->oplock_type != NO_OPLOCK) &&
- (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
koplocks) {
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);
static void downgrade_file_oplock(files_struct *fsp)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
if (!EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
DEBUG(0, ("trying to downgrade an already-downgraded oplock!\n"));
return;
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;
+
+ TALLOC_FREE(fsp->oplock_timeout);
}
/****************************************************************************
bool ret;
struct share_mode_lock *lck;
+ DEBUG(10, ("remove_oplock called for %s\n",
+ fsp_str_dbg(fsp)));
+
/* 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_str_dbg(fsp)));
return False;
}
+
+ if (fsp->oplock_type == LEVEL_II_OPLOCK) {
+
+ /*
+ * If we're the only LEVEL_II holder, we have to remove the
+ * have_read_oplocks from the brlock entry
+ */
+
+ struct share_mode_data *data = lck->data;
+ uint32_t i, num_level2;
+
+ num_level2 = 0;
+ for (i=0; i<data->num_share_modes; i++) {
+ if (data->share_modes[i].op_type == LEVEL_II_OPLOCK) {
+ num_level2 += 1;
+ }
+ if (num_level2 > 1) {
+ /*
+ * No need to count them all...
+ */
+ break;
+ }
+ }
+
+ if (num_level2 == 1) {
+ /*
+ * That's only us. We are dropping that level2 oplock,
+ * so remove the brlock flag.
+ */
+ struct byte_range_lock *brl;
+
+ brl = brl_get_locks(talloc_tos(), fsp);
+ if (brl) {
+ brl_set_have_read_oplocks(brl, false);
+ TALLOC_FREE(brl);
+ }
+ }
+ }
+
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 %s, %s, %s\n",
+ fsp_str_dbg(fsp), fsp_fnum_dbg(fsp),
file_id_string_tos(&fsp->file_id)));
}
release_file_oplock(fsp);
{
bool ret;
struct share_mode_lock *lck;
+ struct byte_range_lock *brl;
+
+ DEBUG(10, ("downgrade_oplock called for %s\n",
+ fsp_str_dbg(fsp)));
- 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_str_dbg(fsp)));
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);
+
+ brl = brl_get_locks(talloc_tos(), fsp);
+ if (brl != NULL) {
+ brl_set_have_read_oplocks(brl, true);
+ TALLOC_FREE(brl);
+ }
+
TALLOC_FREE(lck);
return ret;
}
-/*
- * Some kernel oplock implementations handle the notification themselves.
- */
-bool should_notify_deferred_opens()
-{
- return !(koplocks &&
- (koplocks->flags & KOPLOCKS_DEFERRED_OPEN_NOTIFICATION));
-}
-
/****************************************************************************
Set up an oplock break message.
****************************************************************************/
-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);
-
- if (result == NULL) {
- DEBUG(0, ("talloc failed\n"));
- return NULL;
- }
+#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;
+ 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)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
/*
* If kernel oplocks already notifies smbds when an oplock break times
* out, just return.
}
fsp->oplock_timeout =
- event_add_timed(smbd_event_context(), fsp,
- timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
- 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");
- }
+ char break_msg[SMB1_BREAK_MESSAGE_LENGTH];
+
+ new_break_message_smb1(fsp, level, break_msg);
show_msg(break_msg);
if (!srv_send_smb(fsp->conn->sconn,
exit_server_cleanly("send_break_message_smb1: "
"srv_send_smb failed.");
}
-
- TALLOC_FREE(break_msg);
}
-void break_level2_to_none_async(files_struct *fsp)
+static void break_level2_to_none_async(files_struct *fsp)
{
struct smbd_server_connection *sconn = fsp->conn->sconn;
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,
+ "to none message for %s, file %s\n", fsp_fnum_dbg(fsp),
fsp_str_dbg(fsp)));
/* Now send a break to none message to our client. */
the client for LEVEL2.
*******************************************************************/
-void process_oplock_async_level2_break_message(struct messaging_context *msg_ctx,
+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)
{
- struct smbd_server_connection *sconn;
struct share_mode_entry msg;
files_struct *fsp;
+ 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;
}
- sconn = msg_ctx_to_sconn(msg_ctx);
- if (sconn == NULL) {
- DEBUG(1, ("could not find sconn\n"));
- return;
- }
-
if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
return;
message_to_share_mode_entry(&msg, (char *)data->data);
DEBUG(10, ("Got oplock async level 2 break message from pid %s: "
- "%s/%lu\n", procid_str(talloc_tos(), &src),
- file_id_string_tos(&msg.id), msg.share_file_id));
+ "%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(sconn, msg.id, msg.share_file_id);
struct server_id src,
DATA_BLOB *data)
{
- struct smbd_server_connection *sconn;
struct share_mode_entry msg;
files_struct *fsp;
bool break_to_level2 = False;
+ 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;
if (data->data == NULL) {
DEBUG(0, ("Got NULL buffer\n"));
return;
}
- sconn = msg_ctx_to_sconn(msg_ctx);
- if (sconn == NULL) {
- DEBUG(1, ("could not find sconn\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 oplock break message from pid %s: %s/%lu\n",
- procid_str(talloc_tos(), &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(sconn, msg.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. Reply
- * with 'ok, oplock broken' */
+ * get to process this message, we have closed the file. */
DEBUG(3, ("Did not find fsp\n"));
-
- /* 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 (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);
+ /*
+ * Nothing to do anymore
+ */
return;
}
DEBUG(3, ("Already downgraded oplock 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)) &&
+ use_kernel = lp_kernel_oplocks(SNUM(fsp->conn)) && koplocks;
+
+ if ((global_client_caps & CAP_LEVEL_II_OPLOCKS) &&
+ !(use_kernel && !(koplocks->flags & KOPLOCKS_LEVEL2_SUPPORTED)) &&
lp_level2_oplocks(SNUM(fsp->conn))) {
break_to_level2 = True;
}
/* 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();
}
fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
- msg.pid = src;
- ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
- &fsp->pending_break_messages,
- &fsp->num_pending_break_messages);
-
add_oplock_timeout_handler(fsp);
}
struct server_id src,
DATA_BLOB *data)
{
- struct smbd_server_connection *sconn;
struct file_id id;
unsigned long file_id;
files_struct *fsp;
+ 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;
}
- sconn = msg_ctx_to_sconn(msg_ctx);
- if (sconn == NULL) {
- DEBUG(1, ("could not find sconn\n"));
- return;
- }
-
/* Pull the data from the message. */
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 %s: %s/%u\n",
- procid_str(talloc_tos(), &src), file_id_string_tos(&id),
+ server_id_str(talloc_tos(), &src), file_id_string_tos(&id),
(unsigned int)file_id));
fsp = initial_break_processing(sconn, id, file_id);
add_oplock_timeout_handler(fsp);
}
-void reply_to_oplock_break_requests(files_struct *fsp)
+struct break_to_none_state {
+ struct smbd_server_connection *sconn;
+ struct file_id id;
+};
+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
+ is level 2 oplocked then it must tell all other level 2 holders to break to
+ none.
+****************************************************************************/
+
+static void contend_level2_oplocks_begin_default(files_struct *fsp,
+ enum level2_contention_type type)
{
- int i;
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct tevent_immediate *im;
+ struct break_to_none_state *state;
+ struct byte_range_lock *brl;
/*
- * If kernel oplocks already notifies smbds when oplocks are
- * broken/removed, just return.
+ * If this file is level II oplocked then we need
+ * to grab the shared memory lock and inform all
+ * other files with a level II lock that they need
+ * to flush their read caches. We keep the lock over
+ * the shared memory area whilst doing this.
*/
- 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(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;
-
- if (data->data == NULL) {
- DEBUG(0, ("Got NULL buffer\n"));
+ if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
+ /*
+ * There can't be any level2 oplocks, we're alone.
+ */
return;
}
- if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
- DEBUG(0, ("Got invalid msg len %u\n",
- (unsigned int)data->length));
+ brl = brl_get_locks_readonly(fsp);
+ if ((brl != NULL) && !brl_have_read_oplocks(brl)) {
+ DEBUG(10, ("No read oplocks around\n"));
return;
}
- /* De-linearize incoming message. */
- message_to_share_mode_entry(&msg, (char *)data->data);
-
- DEBUG(10, ("Got oplock break response from pid %s: %s/%lu mid %llu\n",
- procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id),
- msg.share_file_id, (unsigned long long)msg.op_mid));
-
- schedule_deferred_open_message_smb(msg.op_mid);
-}
+ /*
+ * 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 event.
+ */
-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;
-
- if (data->data == NULL) {
- DEBUG(0, ("Got NULL buffer\n"));
+ 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;
- if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
- DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ im = tevent_create_immediate(state);
+ if (im == NULL) {
+ DEBUG(1, ("tevent_create_immediate failed\n"));
+ TALLOC_FREE(state);
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",
- procid_str(talloc_tos(), &src), file_id_string_tos(&msg.id),
- (unsigned long long)msg.op_mid));
-
- schedule_deferred_open_message_smb(msg.op_mid);
+ tevent_schedule_immediate(im, sconn->ev_ctx, do_break_to_none, state);
}
-/****************************************************************************
- 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.
-****************************************************************************/
-
-static void contend_level2_oplocks_begin_default(files_struct *fsp,
- enum level2_contention_type type)
+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);
+ struct server_id self = messaging_server_id(state->sconn->msg_ctx);
int i;
struct share_mode_lock *lck;
- /*
- * If this file is level II oplocked then we need
- * to grab the shared memory lock and inform all
- * other files with a level II lock that they need
- * to flush their read caches. We keep the lock over
- * the shared memory area whilst doing this.
- */
-
- if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
- return;
-
- lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
- NULL);
+ lck = get_existing_share_mode_lock(talloc_tos(), state->id);
if (lck == NULL) {
- DEBUG(0,("release_level_2_oplocks_on_change: failed to lock "
- "share mode entry for file %s.\n", fsp_str_dbg(fsp)));
- return;
+ 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)) {
* Bugid #5980.
*/
- if (procid_is_me(&share_entry->pid)) {
- wait_before_sending_break();
- break_level2_to_none_async(fsp);
+ if (serverid_equal(&self, &share_entry->pid)) {
+ struct files_struct *cur_fsp =
+ initial_break_processing(state->sconn,
+ share_entry->id,
+ share_entry->share_file_id);
+ if (cur_fsp != NULL) {
+ wait_before_sending_break();
+ 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(fsp->conn->sconn->msg_ctx,
+ messaging_send_buf(state->sconn->msg_ctx,
share_entry->pid,
MSG_SMB_ASYNC_LEVEL2_BREAK,
- (uint8 *)msg,
- MSG_SMB_SHARE_MODE_ENTRY_SIZE);
+ (uint8 *)msg, sizeof(msg));
}
}
in the share mode lock db. */
TALLOC_FREE(lck);
+done:
+ TALLOC_FREE(state);
+ return;
}
-void contend_level2_oplocks_begin(files_struct *fsp,
+void smbd_contend_level2_oplocks_begin(files_struct *fsp,
enum level2_contention_type type)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
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 contend_level2_oplocks_end(files_struct *fsp,
+void smbd_contend_level2_oplocks_end(files_struct *fsp,
enum level2_contention_type type)
{
+ struct smbd_server_connection *sconn = fsp->conn->sconn;
+ struct kernel_oplocks *koplocks = sconn->oplocks.kernel_ops;
+
/* Only kernel oplocks implement this so far */
if (koplocks && koplocks->ops->contend_level2_oplocks_end) {
koplocks->ops->contend_level2_oplocks_end(fsp, type);
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);
-#ifdef CLUSTER_SUPPORT
+ SIVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET,e->name_hash);
SIVAL(msg,OP_BREAK_MSG_VNN_OFFSET,e->pid.vnn);
-#endif
}
/****************************************************************************
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 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->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);
-#ifdef CLUSTER_SUPPORT
+ e->name_hash = IVAL(msg,OP_BREAK_MSG_NAME_HASH_OFFSET);
e->pid.vnn = IVAL(msg,OP_BREAK_MSG_VNN_OFFSET);
-#endif
}
/****************************************************************************
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,
- 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,
- process_open_retry_message);
+ return true;
+}
- if (lp_kernel_oplocks()) {
+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_IRIX
- koplocks = irix_init_kernel_oplocks(NULL);
+ koplocks = irix_init_kernel_oplocks(sconn);
#elif HAVE_KERNEL_OPLOCKS_LINUX
- koplocks = linux_init_kernel_oplocks(NULL);
-#elif HAVE_ONEFS
-#error Isilon, please check if the NULL context is okay here. Thanks!
- koplocks = onefs_init_kernel_oplocks(NULL);
+ koplocks = linux_init_kernel_oplocks(sconn);
#endif
+ sconn->oplocks.kernel_ops = koplocks;
}
-
- return True;
}
git.samba.org / mat / samba.git / blobdiff