oplock processing
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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#define DBGC_CLASS DBGC_LOCKING
#include "includes.h"
-/* Oplock ipc UDP socket. */
-static int oplock_sock = -1;
-uint16 global_oplock_port = 0;
-
/* 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;
-BOOL global_oplock_break = False;
+bool global_client_failed_oplock_break = False;
-extern int smb_read_error;
+extern uint32 global_client_caps;
static struct kernel_oplocks *koplocks;
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, unsigned long file_id, BOOL local);
-
/****************************************************************************
Get the number of current exclusive oplocks.
****************************************************************************/
Return True if an oplock message is pending.
****************************************************************************/
-BOOL oplock_message_waiting(fd_set *fds)
+bool oplock_message_waiting(fd_set *fds)
{
- if (koplocks && koplocks->msg_waiting(fds))
- return True;
-
- if (FD_ISSET(oplock_sock, fds))
+ if (koplocks && koplocks->msg_waiting(fds)) {
return True;
+ }
return False;
}
/****************************************************************************
- Read an oplock break message from either the oplock UDP fd or the
- kernel (if kernel oplocks are supported).
-
- If timeout is zero then *fds contains the file descriptors that
- are ready to be read and acted upon. If timeout is non-zero then
- *fds contains the file descriptors to be selected on for read.
- The timeout is in milliseconds
-
+ 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.
****************************************************************************/
-BOOL receive_local_message( char *buffer, int buffer_len, int timeout)
+void process_kernel_oplocks(struct messaging_context *msg_ctx, fd_set *pfds)
{
- struct sockaddr_in from;
- socklen_t fromlen = sizeof(from);
- int32 msg_len = 0;
- fd_set fds;
- int selrtn = -1;
-
- FD_ZERO(&fds);
- smb_read_error = 0;
-
/*
* 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 && koplocks->msg_waiting(&fds)) {
- return koplocks->receive_message(&fds, buffer, buffer_len);
+ if (!koplocks) {
+ return;
}
- while (timeout > 0 && selrtn == -1) {
- struct timeval to;
- int maxfd = oplock_sock;
- time_t starttime = time(NULL);
-
- FD_ZERO(&fds);
- maxfd = setup_oplock_select_set(&fds);
-
- to.tv_sec = timeout / 1000;
- to.tv_usec = (timeout % 1000) * 1000;
-
- DEBUG(5,("receive_local_message: doing select with timeout of %d ms\n", timeout));
-
- selrtn = sys_select(maxfd+1,&fds,NULL,NULL,&to);
-
- if (selrtn == -1 && errno == EINTR) {
-
- /* could be a kernel oplock interrupt */
- if (koplocks && koplocks->msg_waiting(&fds)) {
- return koplocks->receive_message(&fds, buffer, buffer_len);
- }
-
- /*
- * Linux 2.0.x seems to have a bug in that
- * it can return -1, EINTR with a timeout of zero.
- * Make sure we bail out here with a read timeout
- * if we got EINTR on a timeout of 1 or less.
- */
-
- if (timeout <= 1) {
- smb_read_error = READ_TIMEOUT;
- return False;
- }
+ while (koplocks->msg_waiting(pfds)) {
+ files_struct *fsp;
+ char msg[MSG_SMB_KERNEL_BREAK_SIZE];
- /* Not a kernel interrupt - could be a SIGUSR1 message. We must restart. */
- /* We need to decrement the timeout here. */
- timeout -= ((time(NULL) - starttime)*1000);
- if (timeout < 0)
- timeout = 1;
+ fsp = koplocks->receive_message(pfds);
- DEBUG(5,("receive_local_message: EINTR : new timeout %d ms\n", timeout));
- continue;
- }
-
- /* Check if error */
- if(selrtn == -1) {
- /* something is wrong. Maybe the socket is dead? */
- smb_read_error = READ_ERROR;
- return False;
- }
-
- /* Did we timeout ? */
- if (selrtn == 0) {
- smb_read_error = READ_TIMEOUT;
- return False;
+ if (fsp == NULL) {
+ DEBUG(3, ("Kernel oplock message announced, but none "
+ "received\n"));
+ return;
}
- }
-
- if (koplocks && koplocks->msg_waiting(&fds)) {
- return koplocks->receive_message(&fds, buffer, buffer_len);
- }
- if (!FD_ISSET(oplock_sock, &fds))
- 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);
- /*
- * From here down we deal with the smbd <--> smbd
- * oplock break protocol only.
- */
+ /* Don't need to be root here as we're only ever
+ sending to ourselves. */
- /*
- * Read a loopback udp message.
- */
- msg_len = sys_recvfrom(oplock_sock, &buffer[OPBRK_CMD_HEADER_LEN],
- buffer_len - OPBRK_CMD_HEADER_LEN, 0, (struct sockaddr *)&from, &fromlen);
-
- if(msg_len < 0) {
- DEBUG(0,("receive_local_message. Error in recvfrom. (%s).\n",strerror(errno)));
- return False;
+ messaging_send_buf(msg_ctx, procid_self(),
+ MSG_SMB_KERNEL_BREAK,
+ (uint8 *)&msg, MSG_SMB_KERNEL_BREAK_SIZE);
}
-
- /* Validate message length. */
- if(msg_len > (buffer_len - OPBRK_CMD_HEADER_LEN)) {
- DEBUG(0,("receive_local_message: invalid msg_len (%d) max can be %d\n", msg_len,
- buffer_len - OPBRK_CMD_HEADER_LEN));
- return False;
- }
-
- /* Validate message from address (must be localhost). */
- if(from.sin_addr.s_addr != htonl(INADDR_LOOPBACK)) {
- DEBUG(0,("receive_local_message: invalid 'from' address \
-(was %lx should be 127.0.0.1)\n", (long)from.sin_addr.s_addr));
- return False;
- }
-
- /* Setup the message header */
- SIVAL(buffer,OPBRK_CMD_LEN_OFFSET,msg_len);
- SSVAL(buffer,OPBRK_CMD_PORT_OFFSET,ntohs(from.sin_port));
-
- return True;
}
/****************************************************************************
disabled (just sets flags). Returns True if oplock set.
****************************************************************************/
-BOOL set_file_oplock(files_struct *fsp, int oplock_type)
+bool set_file_oplock(files_struct *fsp, int oplock_type)
{
- if (koplocks && !koplocks->set_oplock(fsp, oplock_type))
+ if (koplocks && !koplocks->set_oplock(fsp, oplock_type)) {
return False;
+ }
fsp->oplock_type = oplock_type;
fsp->sent_oplock_break = NO_BREAK_SENT;
- if (oplock_type == LEVEL_II_OPLOCK)
+ if (oplock_type == LEVEL_II_OPLOCK) {
level_II_oplocks_open++;
- else
+ } else {
exclusive_oplocks_open++;
+ }
- DEBUG(5,("set_file_oplock: granted oplock on file %s, dev = %x, inode = %.0f, file_id = %lu, \
-tv_sec = %x, tv_usec = %x\n",
- fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id,
- (int)fsp->open_time.tv_sec, (int)fsp->open_time.tv_usec ));
+ 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->fh->gen_id, (int)fsp->open_time.tv_sec,
+ (int)fsp->open_time.tv_usec ));
return True;
}
void release_file_oplock(files_struct *fsp)
{
- if (koplocks)
+ if ((fsp->oplock_type != NO_OPLOCK) &&
+ (fsp->oplock_type != FAKE_LEVEL_II_OPLOCK) &&
+ koplocks) {
koplocks->release_oplock(fsp);
+ }
- if (fsp->oplock_type == LEVEL_II_OPLOCK)
+ if (fsp->oplock_type == LEVEL_II_OPLOCK) {
level_II_oplocks_open--;
- else
+ } else if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
exclusive_oplocks_open--;
+ }
+
+ SMB_ASSERT(exclusive_oplocks_open>=0);
+ SMB_ASSERT(level_II_oplocks_open>=0);
fsp->oplock_type = NO_OPLOCK;
fsp->sent_oplock_break = NO_BREAK_SENT;
flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
+
+ TALLOC_FREE(fsp->oplock_timeout);
}
/****************************************************************************
static void downgrade_file_oplock(files_struct *fsp)
{
- if (koplocks)
+ if (koplocks) {
koplocks->release_oplock(fsp);
+ }
fsp->oplock_type = LEVEL_II_OPLOCK;
exclusive_oplocks_open--;
level_II_oplocks_open++;
to none even if a "break-to-level II" was sent.
****************************************************************************/
-BOOL remove_oplock(files_struct *fsp, BOOL break_to_none)
+bool remove_oplock(files_struct *fsp)
{
- SMB_DEV_T dev = fsp->dev;
- SMB_INO_T inode = fsp->inode;
- BOOL ret = True;
+ bool ret;
+ struct share_mode_lock *lck;
/* Remove the oplock flag from the sharemode. */
- if (lock_share_entry_fsp(fsp) == False) {
- DEBUG(0,("remove_oplock: failed to lock share entry for file %s\n",
- fsp->fsp_name ));
- ret = False;
+ lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
+ NULL);
+ if (lck == NULL) {
+ DEBUG(0,("remove_oplock: failed to lock share entry for "
+ "file %s\n", fsp->fsp_name ));
+ return False;
}
-
- if (fsp->sent_oplock_break == EXCLUSIVE_BREAK_SENT || break_to_none) {
- /*
- * Deal with a reply when a break-to-none was sent.
- */
-
- if(remove_share_oplock(fsp)==False) {
- DEBUG(0,("remove_oplock: failed to remove share oplock for file %s fnum %d, \
-dev = %x, inode = %.0f\n", fsp->fsp_name, fsp->fnum, (unsigned int)dev, (double)inode));
- ret = False;
- }
-
- release_file_oplock(fsp);
- } else {
- /*
- * Deal with a reply when a break-to-level II was sent.
- */
- if(downgrade_share_oplock(fsp)==False) {
- DEBUG(0,("remove_oplock: failed to downgrade share oplock for file %s fnum %d, \
-dev = %x, inode = %.0f\n", fsp->fsp_name, fsp->fnum, (unsigned int)dev, (double)inode));
- ret = False;
- }
-
- downgrade_file_oplock(fsp);
+ 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)));
}
-
- unlock_share_entry_fsp(fsp);
+ release_file_oplock(fsp);
+ TALLOC_FREE(lck);
return ret;
}
-/****************************************************************************
- Setup the listening set of file descriptors for an oplock break
- message either from the UDP socket or from the kernel. Returns the maximum
- fd used.
-****************************************************************************/
-
-int setup_oplock_select_set( fd_set *fds)
+/*
+ * Deal with a reply when a break-to-level II was sent.
+ */
+bool downgrade_oplock(files_struct *fsp)
{
- int maxfd = oplock_sock;
-
- if(oplock_sock == -1)
- return 0;
-
- FD_SET(oplock_sock,fds);
-
- if (koplocks && koplocks->notification_fd != -1) {
- FD_SET(koplocks->notification_fd, fds);
- maxfd = MAX(maxfd, koplocks->notification_fd);
+ bool ret;
+ struct share_mode_lock *lck;
+
+ lck = get_share_mode_lock(talloc_tos(), fsp->file_id, NULL, NULL,
+ NULL);
+ if (lck == NULL) {
+ DEBUG(0,("downgrade_oplock: failed to lock share entry for "
+ "file %s\n", fsp->fsp_name ));
+ 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)));
}
- return maxfd;
+ downgrade_file_oplock(fsp);
+ TALLOC_FREE(lck);
+ return ret;
}
/****************************************************************************
- Process an oplock break message - whether it came from the UDP socket
- or from the kernel.
+ Return the fd (if any) used for receiving oplock notifications.
****************************************************************************/
-BOOL process_local_message(char *buffer, int buf_size)
+int oplock_notify_fd(void)
{
- int32 msg_len;
- uint16 from_port;
- char *msg_start;
- pid_t remotepid;
- SMB_DEV_T dev;
- SMB_INO_T inode;
- unsigned long file_id;
- uint16 break_cmd_type;
-
- msg_len = IVAL(buffer,OPBRK_CMD_LEN_OFFSET);
- from_port = SVAL(buffer,OPBRK_CMD_PORT_OFFSET);
-
- msg_start = &buffer[OPBRK_CMD_HEADER_LEN];
-
- DEBUG(5,("process_local_message: Got a message of length %d from port (%d)\n",
- msg_len, from_port));
-
- /*
- * Pull the info out of the requesting packet.
- */
-
- break_cmd_type = SVAL(msg_start,OPBRK_MESSAGE_CMD_OFFSET);
-
- switch(break_cmd_type) {
- case KERNEL_OPLOCK_BREAK_CMD:
- if (!koplocks) {
- DEBUG(0,("unexpected kernel oplock break!\n"));
- break;
- }
- if (!koplocks->parse_message(msg_start, msg_len, &inode, &dev, &file_id)) {
- DEBUG(0,("kernel oplock break parse failure!\n"));
- }
- break;
-
- case OPLOCK_BREAK_CMD:
- case LEVEL_II_OPLOCK_BREAK_CMD:
-
- /* Ensure that the msg length is correct. */
- if(msg_len != OPLOCK_BREAK_MSG_LEN) {
- DEBUG(0,("process_local_message: incorrect length for OPLOCK_BREAK_CMD (was %d, should be %d).\n",
- (int)msg_len, (int)OPLOCK_BREAK_MSG_LEN));
- return False;
- }
-
- memcpy((char *)&remotepid, msg_start+OPLOCK_BREAK_PID_OFFSET,sizeof(remotepid));
- memcpy((char *)&inode, msg_start+OPLOCK_BREAK_INODE_OFFSET,sizeof(inode));
- memcpy((char *)&dev, msg_start+OPLOCK_BREAK_DEV_OFFSET,sizeof(dev));
- memcpy((char *)&file_id, msg_start+OPLOCK_BREAK_FILEID_OFFSET,sizeof(file_id));
-
- DEBUG(5,("process_local_message: (%s) oplock break request from \
-pid %d, port %d, dev = %x, inode = %.0f, file_id = %lu\n",
- (break_cmd_type == OPLOCK_BREAK_CMD) ? "exclusive" : "level II",
- (int)remotepid, from_port, (unsigned int)dev, (double)inode, file_id));
- break;
-
- /*
- * Keep this as a debug case - eventually we can remove it.
- */
- case 0x8001:
- DEBUG(0,("process_local_message: Received unsolicited break \
-reply - dumping info.\n"));
-
- if(msg_len != OPLOCK_BREAK_MSG_LEN) {
- DEBUG(0,("process_local_message: ubr: incorrect length for reply \
-(was %d, should be %d).\n", (int)msg_len, (int)OPLOCK_BREAK_MSG_LEN));
- return False;
- }
-
- memcpy((char *)&inode, msg_start+OPLOCK_BREAK_INODE_OFFSET,sizeof(inode));
- memcpy((char *)&remotepid, msg_start+OPLOCK_BREAK_PID_OFFSET,sizeof(remotepid));
- memcpy((char *)&dev, msg_start+OPLOCK_BREAK_DEV_OFFSET,sizeof(dev));
- memcpy((char *)&file_id, msg_start+OPLOCK_BREAK_FILEID_OFFSET,sizeof(file_id));
-
- DEBUG(0,("process_local_message: unsolicited oplock break reply from \
-pid %d, port %d, dev = %x, inode = %.0f, file_id = %lu\n",
- (int)remotepid, from_port, (unsigned int)dev, (double)inode, file_id));
-
- return False;
-
- default:
- DEBUG(0,("process_local_message: unknown UDP message command code (%x) - ignoring.\n",
- (unsigned int)SVAL(msg_start,0)));
- return False;
- }
-
- /*
- * Now actually process the break request.
- */
-
- if((exclusive_oplocks_open + level_II_oplocks_open) != 0) {
- if (oplock_break(dev, inode, file_id, False) == False) {
- DEBUG(0,("process_local_message: oplock break failed.\n"));
- return False;
- }
- } else {
- /*
- * If we have no record of any currently open oplocks,
- * it's not an error, as a close command may have
- * just been issued on the file that was oplocked.
- * Just log a message and return success in this case.
- */
- DEBUG(3,("process_local_message: oplock break requested with no outstanding \
-oplocks. Returning success.\n"));
+ if (koplocks) {
+ return koplocks->notification_fd;
}
- /*
- * Do the appropriate reply - none in the kernel or level II case.
- */
-
- if(SVAL(msg_start,OPBRK_MESSAGE_CMD_OFFSET) == OPLOCK_BREAK_CMD) {
- struct sockaddr_in toaddr;
-
- /* Send the message back after OR'ing in the 'REPLY' bit. */
- SSVAL(msg_start,OPBRK_MESSAGE_CMD_OFFSET,OPLOCK_BREAK_CMD | CMD_REPLY);
-
- memset((char *)&toaddr,'\0',sizeof(toaddr));
- toaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- toaddr.sin_port = htons(from_port);
- toaddr.sin_family = AF_INET;
-
- if(sys_sendto( oplock_sock, msg_start, OPLOCK_BREAK_MSG_LEN, 0,
- (struct sockaddr *)&toaddr, sizeof(toaddr)) < 0) {
- DEBUG(0,("process_local_message: sendto process %d failed. Errno was %s\n",
- (int)remotepid, strerror(errno)));
- return False;
- }
-
- DEBUG(5,("process_local_message: oplock break reply sent to \
-pid %d, port %d, for file dev = %x, inode = %.0f, file_id = %lu\n",
- (int)remotepid, from_port, (unsigned int)dev, (double)inode, file_id));
- }
-
- return True;
+ return -1;
}
/****************************************************************************
Set up an oplock break message.
****************************************************************************/
-static void prepare_break_message(char *outbuf, files_struct *fsp, BOOL level2)
+static char *new_break_smb_message(TALLOC_CTX *mem_ctx,
+ files_struct *fsp, uint8 cmd)
{
- memset(outbuf,'\0',smb_size);
- set_message(outbuf,8,0,True);
-
- SCVAL(outbuf,smb_com,SMBlockingX);
- SSVAL(outbuf,smb_tid,fsp->conn->cnum);
- SSVAL(outbuf,smb_pid,0xFFFF);
- SSVAL(outbuf,smb_uid,0);
- SSVAL(outbuf,smb_mid,0xFFFF);
- SCVAL(outbuf,smb_vwv0,0xFF);
- SSVAL(outbuf,smb_vwv2,fsp->fnum);
- SCVAL(outbuf,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
- SCVAL(outbuf,smb_vwv3+1,level2 ? OPLOCKLEVEL_II : OPLOCKLEVEL_NONE);
+ char *result = TALLOC_ARRAY(mem_ctx, char, smb_size + 8*2 + 0);
+
+ if (result == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ memset(result,'\0',smb_size);
+ srv_set_message(result,8,0,true);
+ SCVAL(result,smb_com,SMBlockingX);
+ SSVAL(result,smb_tid,fsp->conn->cnum);
+ SSVAL(result,smb_pid,0xFFFF);
+ SSVAL(result,smb_uid,0);
+ SSVAL(result,smb_mid,0xFFFF);
+ SCVAL(result,smb_vwv0,0xFF);
+ SSVAL(result,smb_vwv2,fsp->fnum);
+ SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
+ SCVAL(result,smb_vwv3+1,cmd);
+ return result;
}
/****************************************************************************
Function to do the waiting before sending a local break.
****************************************************************************/
-static void wait_before_sending_break(BOOL local_request)
+static void wait_before_sending_break(void)
{
- extern struct timeval smb_last_time;
-
- if(local_request) {
- struct timeval cur_tv;
- long wait_left = (long)lp_oplock_break_wait_time();
-
- if (wait_left == 0)
- return;
+ long wait_time = (long)lp_oplock_break_wait_time();
- GetTimeOfDay(&cur_tv);
-
- wait_left -= ((cur_tv.tv_sec - smb_last_time.tv_sec)*1000) +
- ((cur_tv.tv_usec - smb_last_time.tv_usec)/1000);
-
- if(wait_left > 0) {
- wait_left = MIN(wait_left, 1000);
- sys_usleep(wait_left * 1000);
- }
+ if (wait_time) {
+ smb_msleep(wait_time);
}
}
Ensure that we have a valid oplock.
****************************************************************************/
-static files_struct *initial_break_processing(SMB_DEV_T dev, SMB_INO_T inode, unsigned long file_id)
+static files_struct *initial_break_processing(struct file_id id, unsigned long file_id)
{
files_struct *fsp = NULL;
if( DEBUGLVL( 3 ) ) {
- dbgtext( "initial_break_processing: called for dev = %x, inode = %.0f file_id = %lu\n",
- (unsigned int)dev, (double)inode, file_id);
+ 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 );
}
* we have an oplock on it.
*/
- fsp = file_find_dif(dev, inode, file_id);
+ fsp = file_find_dif(id, file_id);
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( "dev = %x, inode = %.0f file_id = %lu", (unsigned int)dev,
- (double)inode, file_id);
+ dbgtext( "file_id %s gen_id = %lu", file_id_string_tos(&id), file_id);
dbgtext( "allowing break to succeed.\n" );
}
return NULL;
if(fsp->oplock_type == NO_OPLOCK) {
if( DEBUGLVL( 3 ) ) {
dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
- dbgtext( "(dev = %x, inode = %.0f, file_id = %lu) has no oplock.\n",
- (unsigned int)dev, (double)inode, fsp->file_id );
+ 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" );
}
return NULL;
return fsp;
}
-/****************************************************************************
- Process a level II oplock break directly.
-****************************************************************************/
+static void oplock_timeout_handler(struct event_context *ctx,
+ struct timed_event *te,
+ const 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;
+ remove_oplock(fsp);
+ reply_to_oplock_break_requests(fsp);
+}
-BOOL oplock_break_level2(files_struct *fsp, BOOL local_request, int token)
+/*******************************************************************
+ Add a timeout handler waiting for the client reply.
+*******************************************************************/
+
+static void add_oplock_timeout_handler(files_struct *fsp)
{
- extern uint32 global_client_caps;
- char outbuf[128];
- BOOL got_lock = False;
- SMB_DEV_T dev = fsp->dev;
- SMB_INO_T inode = fsp->inode;
+ if (fsp->oplock_timeout != NULL) {
+ DEBUG(0, ("Logic problem -- have an oplock event hanging "
+ "around\n"));
+ }
- /*
- * We can have a level II oplock even if the client is not
- * level II oplock aware. In this case just remove the
- * flags and don't send the break-to-none message to
- * the client.
- */
+ fsp->oplock_timeout =
+ event_add_timed(smbd_event_context(), NULL,
+ timeval_current_ofs(OPLOCK_BREAK_TIMEOUT, 0),
+ "oplock_timeout_handler",
+ oplock_timeout_handler, fsp);
- if (global_client_caps & CAP_LEVEL_II_OPLOCKS) {
- /*
- * If we are sending an oplock break due to an SMB sent
- * by our own client we ensure that we wait at leat
- * lp_oplock_break_wait_time() milliseconds before sending
- * the packet. Sending the packet sooner can break Win9x
- * and has reported to cause problems on NT. JRA.
- */
+ if (fsp->oplock_timeout == NULL) {
+ DEBUG(0, ("Could not add oplock timeout handler\n"));
+ }
+}
- wait_before_sending_break(local_request);
+/*******************************************************************
+ 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.
+*******************************************************************/
+
+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 share_mode_entry msg;
+ files_struct *fsp;
+ char *break_msg;
+ bool sign_state;
- /* Prepare the SMBlockingX message. */
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
- prepare_break_message( outbuf, fsp, False);
- if (!send_smb(smbd_server_fd(), outbuf))
- exit_server("oplock_break_level2: send_smb failed.");
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
}
- /*
- * Now we must update the shared memory structure to tell
- * everyone else we no longer have a level II oplock on
- * this open file. If local_request is true then token is
- * the existing lock on the shared memory area.
- */
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
- if(!local_request && lock_share_entry_fsp(fsp) == False) {
- DEBUG(0,("oplock_break_level2: unable to lock share entry for file %s\n", fsp->fsp_name ));
- } else {
- got_lock = True;
+ 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));
+
+ fsp = initial_break_processing(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.
+ * No need to reply as this is an async message. */
+ DEBUG(3, ("process_oplock_async_level2_break_message: Did not find fsp, ignoring\n"));
+ return;
}
- if(remove_share_oplock(fsp)==False) {
- DEBUG(0,("oplock_break_level2: unable to remove level II oplock for file %s\n", fsp->fsp_name ));
+ 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 (!local_request && got_lock)
- unlock_share_entry_fsp(fsp);
+ 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;
+ }
- fsp->oplock_type = NO_OPLOCK;
- level_II_oplocks_open--;
+ /* Ensure we're really at level2 state. */
+ SMB_ASSERT(fsp->oplock_type == LEVEL_II_OPLOCK);
- if(level_II_oplocks_open < 0) {
- DEBUG(0,("oplock_break_level2: level_II_oplocks_open < 0 (%d). PANIC ERROR\n",
- level_II_oplocks_open));
- abort();
+ /* 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");
}
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "oplock_break_level2: returning success for " );
- dbgtext( "dev = %x, inode = %.0f, file_id = %lu\n", (unsigned int)dev, (double)inode, fsp->file_id );
- dbgtext( "Current level II oplocks_open = %d\n", level_II_oplocks_open );
+ /* 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();
}
- return True;
-}
+ /* Save the server smb signing state. */
+ sign_state = srv_oplock_set_signing(False);
-/****************************************************************************
- Process an oplock break directly.
-****************************************************************************/
+ 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.");
+ }
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, unsigned long file_id, BOOL local_request)
-{
- extern uint32 global_client_caps;
- extern struct current_user current_user;
- char *inbuf = NULL;
- char *outbuf = NULL;
- files_struct *fsp = NULL;
- time_t start_time;
- BOOL shutdown_server = False;
- BOOL oplock_timeout = False;
- connection_struct *saved_user_conn;
- connection_struct *saved_fsp_conn;
- int saved_vuid;
- pstring saved_dir;
- int timeout = (OPLOCK_BREAK_TIMEOUT * 1000);
- pstring file_name;
- BOOL using_levelII;
-
- if((fsp = initial_break_processing(dev, inode, file_id)) == NULL)
- return True;
+ /* Restore the sign state to what it was. */
+ srv_oplock_set_signing(sign_state);
- /*
- * Deal with a level II oplock going break to none separately.
- */
+ TALLOC_FREE(break_msg);
- if (LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
- return oplock_break_level2(fsp, local_request, -1);
+ /* Async level2 request, don't send a reply, just remove the oplock. */
+ remove_oplock(fsp);
+}
- /* Mark the oplock break as sent - we don't want to send twice! */
- if (fsp->sent_oplock_break) {
- if( DEBUGLVL( 0 ) ) {
- dbgtext( "oplock_break: ERROR: oplock_break already sent for " );
- dbgtext( "file %s ", fsp->fsp_name);
- dbgtext( "(dev = %x, inode = %.0f, file_id = %lu)\n", (unsigned int)dev, (double)inode, fsp->file_id );
- }
+/*******************************************************************
+ This handles the generic oplock break message from another smbd.
+*******************************************************************/
- /*
- * We have to fail the open here as we cannot send another oplock break on
- * this file whilst we are awaiting a response from the client - neither
- * can we allow another open to succeed while we are waiting for the client.
- */
- return False;
+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;
+ char *break_msg;
+ bool break_to_level2 = False;
+ bool sign_state;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
}
- if(global_oplock_break) {
- DEBUG(0,("ABORT : ABORT : recursion in oplock_break !!!!!\n"));
- abort();
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
}
- /*
- * Now comes the horrid part. We must send an oplock break to the client,
- * and then process incoming messages until we get a close or oplock release.
- * At this point we know we need a new inbuf/outbuf buffer pair.
- * We cannot use these staticaly as we may recurse into here due to
- * messages crossing on the wire.
- */
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
- if((inbuf = (char *)malloc(BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN))==NULL) {
- DEBUG(0,("oplock_break: malloc fail for input buffer.\n"));
- return False;
- }
+ 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));
- if((outbuf = (char *)malloc(BUFFER_SIZE + LARGE_WRITEX_HDR_SIZE + SAFETY_MARGIN))==NULL) {
- DEBUG(0,("oplock_break: malloc fail for output buffer.\n"));
- SAFE_FREE(inbuf);
- return False;
- }
+ fsp = initial_break_processing(msg.id, msg.share_file_id);
- /*
- * If we are sending an oplock break due to an SMB sent
- * by our own client we ensure that we wait at leat
- * lp_oplock_break_wait_time() milliseconds before sending
- * the packet. Sending the packet sooner can break Win9x
- * and has reported to cause problems on NT. JRA.
- */
+ if (fsp == NULL) {
+ /* a We hit 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"));
- wait_before_sending_break(local_request);
+ /* 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);
+ return;
+ }
- /* Prepare the SMBlockingX message. */
+ if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
+ !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));
+ /* 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) &&
- !koplocks && /* NOTE: we force levelII off for kernel oplocks - this will change when it is supported */
- lp_level2_oplocks(SNUM(fsp->conn))) {
- using_levelII = True;
- } else {
- using_levelII = False;
+ !(msg.op_type & FORCE_OPLOCK_BREAK_TO_NONE) &&
+ !koplocks && /* NOTE: we force levelII off for kernel oplocks -
+ * this will change when it is supported */
+ lp_level2_oplocks(SNUM(fsp->conn))) {
+ break_to_level2 = True;
}
- prepare_break_message( outbuf, fsp, using_levelII);
- /* Remember if we just sent a break to level II on this file. */
- fsp->sent_oplock_break = using_levelII? LEVEL_II_BREAK_SENT:EXCLUSIVE_BREAK_SENT;
+ 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");
+ }
- if (!send_smb(smbd_server_fd(), outbuf))
- exit_server("oplock_break: send_smb failed.");
+ /* 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();
+ }
- /* We need this in case a readraw crosses on the wire. */
- global_oplock_break = True;
-
- /* Process incoming messages. */
+ /* Save the server smb signing state. */
+ sign_state = srv_oplock_set_signing(False);
- /*
- * JRA - If we don't get a break from the client in OPLOCK_BREAK_TIMEOUT
- * seconds we should just die....
- */
+ 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.");
+ }
- start_time = time(NULL);
+ /* Restore the sign state to what it was. */
+ srv_oplock_set_signing(sign_state);
- /*
- * Save the information we need to re-become the
- * user, then unbecome the user whilst we're doing this.
- */
- saved_user_conn = current_user.conn;
- saved_vuid = current_user.vuid;
- saved_fsp_conn = fsp->conn;
- change_to_root_user();
- vfs_GetWd(saved_fsp_conn,saved_dir);
- /* Save the chain fnum. */
- file_chain_save();
+ TALLOC_FREE(break_msg);
- /*
- * From Charles Hoch <hoch@exemplary.com>. If the break processing
- * code closes the file (as it often does), then the fsp pointer here
- * points to free()'d memory. We *must* revalidate fsp each time
- * around the loop.
- */
+ fsp->sent_oplock_break = break_to_level2 ? LEVEL_II_BREAK_SENT:BREAK_TO_NONE_SENT;
- pstrcpy(file_name, fsp->fsp_name);
-
- while((fsp = initial_break_processing(dev, inode, file_id)) &&
- OPEN_FSP(fsp) && EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- if(receive_smb(smbd_server_fd(),inbuf, timeout) == False) {
- /*
- * Die if we got an error.
- */
-
- if (smb_read_error == READ_EOF) {
- DEBUG( 0, ( "oplock_break: end of file from client\n" ) );
- shutdown_server = True;
- } else if (smb_read_error == READ_ERROR) {
- DEBUG( 0, ("oplock_break: receive_smb error (%s)\n", strerror(errno)) );
- shutdown_server = True;
- } else if (smb_read_error == READ_TIMEOUT) {
- DEBUG( 0, ( "oplock_break: receive_smb timed out after %d seconds.\n", OPLOCK_BREAK_TIMEOUT ) );
- oplock_timeout = True;
- }
-
- DEBUGADD( 0, ( "oplock_break failed for file %s ", file_name ) );
- DEBUGADD( 0, ( "(dev = %x, inode = %.0f, file_id = %lu).\n",
- (unsigned int)dev, (double)inode, file_id));
-
- break;
- }
+ msg.pid = src;
+ ADD_TO_ARRAY(NULL, struct share_mode_entry, msg,
+ &fsp->pending_break_messages,
+ &fsp->num_pending_break_messages);
- /*
- * There are certain SMB requests that we shouldn't allow
- * to recurse. opens, renames and deletes are the obvious
- * ones. This is handled in the switch_message() function.
- * If global_oplock_break is set they will push the packet onto
- * the pending smb queue and return -1 (no reply).
- * JRA.
- */
+ add_oplock_timeout_handler(fsp);
+}
- process_smb(inbuf, outbuf);
+/*******************************************************************
+ This handles the kernel oplock break message.
+*******************************************************************/
- /*
- * Die if we go over the time limit.
- */
+static void process_kernel_oplock_break(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id src,
+ DATA_BLOB *data)
+{
+ struct file_id id;
+ unsigned long file_id;
+ files_struct *fsp;
+ char *break_msg;
+ bool sign_state;
- if((time(NULL) - start_time) > OPLOCK_BREAK_TIMEOUT) {
- if( DEBUGLVL( 0 ) ) {
- dbgtext( "oplock_break: no break received from client " );
- dbgtext( "within %d seconds.\n", OPLOCK_BREAK_TIMEOUT );
- dbgtext( "oplock_break failed for file %s ", fsp->fsp_name );
- dbgtext( "(dev = %x, inode = %.0f, file_id = %lu).\n",
- (unsigned int)dev, (double)inode, file_id );
- }
- oplock_timeout = True;
- break;
- }
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
}
- /*
- * Go back to being the user who requested the oplock
- * break.
- */
- if((saved_user_conn != NULL) && (saved_vuid != UID_FIELD_INVALID) && !change_to_user(saved_user_conn, saved_vuid)) {
- DEBUG( 0, ( "oplock_break: unable to re-become user!" ) );
- DEBUGADD( 0, ( "Shutting down server\n" ) );
- close(oplock_sock);
- exit_server("unable to re-become user");
+ if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
}
- /* Including the directory. */
- vfs_ChDir(saved_fsp_conn,saved_dir);
+ /* Pull the data from the message. */
+ pull_file_id_16((char *)data->data, &id);
+ file_id = (unsigned long)IVAL(data->data, 16);
- /* Restore the chain fnum. */
- file_chain_restore();
+ DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
+ (int)procid_to_pid(&src), file_id_string_tos(&id),
+ (unsigned int)file_id));
- /* Free the buffers we've been using to recurse. */
- SAFE_FREE(inbuf);
- SAFE_FREE(outbuf);
+ fsp = initial_break_processing(id, file_id);
- /* We need this in case a readraw crossed on the wire. */
- if(global_oplock_break)
- global_oplock_break = False;
-
- /*
- * If the client timed out then clear the oplock (or go to level II)
- * and continue. This seems to be what NT does and is better than dropping
- * the connection.
- */
-
- if(oplock_timeout && (fsp = initial_break_processing(dev, inode, file_id)) &&
- OPEN_FSP(fsp) && EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
- DEBUG(0,("oplock_break: client failure in oplock break in file %s\n", fsp->fsp_name));
- remove_oplock(fsp,True);
-#if FASCIST_OPLOCK_BACKOFF
- global_client_failed_oplock_break = True; /* Never grant this client an oplock again. */
-#endif
+ if (fsp == NULL) {
+ DEBUG(3, ("Got a kernel oplock break message for a file "
+ "I don't know about\n"));
+ return;
}
- /*
- * If the client had an error we must die.
- */
-
- if(shutdown_server) {
- DEBUG( 0, ( "oplock_break: client failure in break - " ) );
- DEBUGADD( 0, ( "shutting down this smbd.\n" ) );
- close(oplock_sock);
- exit_server("oplock break failure");
+ if (fsp->sent_oplock_break != NO_BREAK_SENT) {
+ /* This is ok, kernel oplocks come in completely async */
+ DEBUG(3, ("Got a kernel oplock request while waiting for a "
+ "break reply\n"));
+ return;
}
- /* Santity check - remove this later. JRA */
- if(exclusive_oplocks_open < 0) {
- DEBUG(0,("oplock_break: exclusive_oplocks_open < 0 (%d). PANIC ERROR\n", exclusive_oplocks_open));
- abort();
+ break_msg = new_break_smb_message(NULL, fsp, OPLOCKLEVEL_NONE);
+ if (break_msg == NULL) {
+ exit_server("Could not talloc break_msg\n");
}
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "oplock_break: returning success for " );
- dbgtext( "dev = %x, inode = %.0f, file_id = %lu\n", (unsigned int)dev, (double)inode, file_id );
- dbgtext( "Current exclusive_oplocks_open = %d\n", exclusive_oplocks_open );
+ /* 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.");
}
- return True;
-}
+ /* Restore the sign state to what it was. */
+ srv_oplock_set_signing(sign_state);
-/****************************************************************************
-Send an oplock break message to another smbd process. If the oplock is held
-by the local smbd then call the oplock break function directly.
-****************************************************************************/
+ TALLOC_FREE(break_msg);
-BOOL request_oplock_break(share_mode_entry *share_entry)
-{
- char op_break_msg[OPLOCK_BREAK_MSG_LEN];
- struct sockaddr_in addr_out;
- pid_t pid = sys_getpid();
- time_t start_time;
- int time_left;
- SMB_DEV_T dev = share_entry->dev;
- SMB_INO_T inode = share_entry->inode;
- unsigned long file_id = share_entry->share_file_id;
-
- if(pid == share_entry->pid) {
- /* We are breaking our own oplock, make sure it's us. */
- if(share_entry->op_port != global_oplock_port) {
- DEBUG(0,("request_oplock_break: corrupt share mode entry - pid = %d, port = %d \
-should be %d\n", (int)pid, share_entry->op_port, global_oplock_port));
- return False;
- }
+ fsp->sent_oplock_break = BREAK_TO_NONE_SENT;
- DEBUG(5,("request_oplock_break: breaking our own oplock\n"));
-
-#if 1 /* JRA PARANOIA TEST.... */
- {
- files_struct *fsp = file_find_dif(dev, inode, file_id);
- if (!fsp) {
- DEBUG(0,("request_oplock_break: PANIC : breaking our own oplock requested for \
-dev = %x, inode = %.0f, file_id = %lu and no fsp found !\n",
- (unsigned int)dev, (double)inode, file_id ));
- smb_panic("request_oplock_break: no fsp found for our own oplock\n");
- }
- }
-#endif /* END JRA PARANOIA TEST... */
+ add_oplock_timeout_handler(fsp);
+}
- /* Call oplock break direct. */
- return oplock_break(dev, inode, file_id, True);
- }
+void reply_to_oplock_break_requests(files_struct *fsp)
+{
+ int i;
- /* We need to send a OPLOCK_BREAK_CMD message to the port in the share mode entry. */
+ 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];
- if (LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
- SSVAL(op_break_msg,OPBRK_MESSAGE_CMD_OFFSET,LEVEL_II_OPLOCK_BREAK_CMD);
- } else {
- SSVAL(op_break_msg,OPBRK_MESSAGE_CMD_OFFSET,OPLOCK_BREAK_CMD);
- }
-
- memcpy(op_break_msg+OPLOCK_BREAK_PID_OFFSET,(char *)&pid,sizeof(pid));
- memcpy(op_break_msg+OPLOCK_BREAK_DEV_OFFSET,(char *)&dev,sizeof(dev));
- memcpy(op_break_msg+OPLOCK_BREAK_INODE_OFFSET,(char *)&inode,sizeof(inode));
- memcpy(op_break_msg+OPLOCK_BREAK_FILEID_OFFSET,(char *)&file_id,sizeof(file_id));
+ share_mode_entry_to_message(msg, e);
- /* Set the address and port. */
- memset((char *)&addr_out,'\0',sizeof(addr_out));
- addr_out.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- addr_out.sin_port = htons( share_entry->op_port );
- addr_out.sin_family = AF_INET;
-
- if( DEBUGLVL( 3 ) ) {
- dbgtext( "request_oplock_break: sending a oplock break message to " );
- dbgtext( "pid %d on port %d ", (int)share_entry->pid, share_entry->op_port );
- dbgtext( "for dev = %x, inode = %.0f, file_id = %lu\n",
- (unsigned int)dev, (double)inode, file_id );
+ messaging_send_buf(smbd_messaging_context(), e->pid,
+ MSG_SMB_BREAK_RESPONSE,
+ (uint8 *)msg,
+ MSG_SMB_SHARE_MODE_ENTRY_SIZE);
}
- if(sys_sendto(oplock_sock,op_break_msg,OPLOCK_BREAK_MSG_LEN,0,
- (struct sockaddr *)&addr_out,sizeof(addr_out)) < 0) {
- if( DEBUGLVL( 0 ) ) {
- dbgtext( "request_oplock_break: failed when sending a oplock " );
- dbgtext( "break message to pid %d ", (int)share_entry->pid );
- dbgtext( "on port %d ", share_entry->op_port );
- dbgtext( "for dev = %x, inode = %.0f, file_id = %lu\n",
- (unsigned int)dev, (double)inode, file_id );
- dbgtext( "Error was %s\n", strerror(errno) );
- }
- return False;
+ 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;
+}
- /*
- * If we just sent a message to a level II oplock share entry then
- * we are done and may 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 (LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
- DEBUG(3,("request_oplock_break: sent break message to level II entry.\n"));
- return True;
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
}
- /*
- * Now we must await the oplock broken message coming back
- * from the target smbd process. Timeout if it fails to
- * return in (OPLOCK_BREAK_TIMEOUT + OPLOCK_BREAK_TIMEOUT_FUDGEFACTOR) seconds.
- * While we get messages that aren't ours, loop.
- */
-
- start_time = time(NULL);
- time_left = OPLOCK_BREAK_TIMEOUT+OPLOCK_BREAK_TIMEOUT_FUDGEFACTOR;
-
- while(time_left >= 0) {
- char op_break_reply[OPBRK_CMD_HEADER_LEN+OPLOCK_BREAK_MSG_LEN];
- uint16 reply_from_port;
- char *reply_msg_start;
-
- if(receive_local_message(op_break_reply, sizeof(op_break_reply),
- time_left ? time_left * 1000 : 1) == False) {
- if(smb_read_error == READ_TIMEOUT) {
- if( DEBUGLVL( 0 ) ) {
- dbgtext( "request_oplock_break: no response received to oplock " );
- dbgtext( "break request to pid %d ", (int)share_entry->pid );
- dbgtext( "on port %d ", share_entry->op_port );
- dbgtext( "for dev = %x, inode = %.0f, file_id = %lu\n",
- (unsigned int)dev, (double)inode, file_id );
- }
-
- /*
- * This is a hack to make handling of failing clients more robust.
- * If a oplock break response message is not received in the timeout
- * period we may assume that the smbd servicing that client holding
- * the oplock has died and the client changes were lost anyway, so
- * we should continue to try and open the file.
- */
- break;
- } else {
- if( DEBUGLVL( 0 ) ) {
- dbgtext( "request_oplock_break: error in response received " );
- dbgtext( "to oplock break request to pid %d ", (int)share_entry->pid );
- dbgtext( "on port %d ", share_entry->op_port );
- dbgtext( "for dev = %x, inode = %.0f, file_id = %lu\n",
- (unsigned int)dev, (double)inode, file_id );
- dbgtext( "Error was (%s).\n", strerror(errno) );
- }
- }
- return False;
- }
-
- reply_from_port = SVAL(op_break_reply,OPBRK_CMD_PORT_OFFSET);
- reply_msg_start = &op_break_reply[OPBRK_CMD_HEADER_LEN];
-
- /*
- * Test to see if this is the reply we are awaiting.
- */
- if((SVAL(reply_msg_start,OPBRK_MESSAGE_CMD_OFFSET) & CMD_REPLY) &&
- ((SVAL(reply_msg_start,OPBRK_MESSAGE_CMD_OFFSET) & ~CMD_REPLY) == OPLOCK_BREAK_CMD) &&
- (reply_from_port == share_entry->op_port) &&
- (memcmp(&reply_msg_start[OPLOCK_BREAK_PID_OFFSET], &op_break_msg[OPLOCK_BREAK_PID_OFFSET],
- OPLOCK_BREAK_MSG_LEN - OPLOCK_BREAK_PID_OFFSET) == 0)) {
-
- /*
- * This is the reply we've been waiting for.
- */
- break;
- } else {
- /*
- * This is another message - a break request.
- * Note that both kernel oplock break requests
- * and UDP inter-smbd oplock break requests will
- * be processed here.
- *
- * Process it to prevent potential deadlock.
- * Note that the code in switch_message() prevents
- * us from recursing into here as any SMB requests
- * we might process that would cause another oplock
- * break request to be made will be queued.
- * JRA.
- */
-
- process_local_message(op_break_reply, sizeof(op_break_reply));
- }
-
- time_left -= (time(NULL) - start_time);
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %u\n",
+ (unsigned int)data->length));
+ return;
}
- DEBUG(3,("request_oplock_break: broke oplock.\n"));
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
- return True;
-}
+ 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));
-/****************************************************************************
- Attempt to break an oplock on a file (if oplocked).
- Returns True if the file was closed as a result of
- the oplock break, False otherwise.
- Used as a last ditch attempt to free a space in the
- file table when we have run out.
-****************************************************************************/
+ /* Here's the hack from open.c, store the mid in the 'port' field */
+ schedule_deferred_open_smb_message(msg.op_mid);
+}
-BOOL attempt_close_oplocked_file(files_struct *fsp)
+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)
{
- DEBUG(5,("attempt_close_oplocked_file: checking file %s.\n", fsp->fsp_name));
+ struct share_mode_entry msg;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
- if (EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type) && !fsp->sent_oplock_break && (fsp->fd != -1)) {
- /* Try and break the oplock. */
- if (oplock_break(fsp->dev, fsp->inode, fsp->file_id, True)) {
- if(file_find_fsp(fsp) == NULL) /* Did the oplock break close the file ? */
- return True;
- }
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
}
- return False;
+ /* 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));
+
+ schedule_deferred_open_smb_message(msg.op_mid);
}
/****************************************************************************
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.
+ 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)
{
- share_mode_entry *share_list = NULL;
- pid_t pid = sys_getpid();
- int token = -1;
- int num_share_modes = 0;
int i;
+ struct share_mode_lock *lck;
/*
* If this file is level II oplocked then we need
if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
return;
- if (lock_share_entry_fsp(fsp) == False) {
- DEBUG(0,("release_level_2_oplocks_on_change: failed to lock share mode entry for file %s.\n", fsp->fsp_name ));
+ 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 ));
+ return;
}
- num_share_modes = get_share_modes(fsp->conn, fsp->dev, fsp->inode, &share_list);
-
DEBUG(10,("release_level_2_oplocks_on_change: num_share_modes = %d\n",
- num_share_modes ));
+ lck->num_share_modes ));
+
+ for(i = 0; i < lck->num_share_modes; i++) {
+ struct share_mode_entry *share_entry = &lck->share_modes[i];
+ char msg[MSG_SMB_SHARE_MODE_ENTRY_SIZE];
- for(i = 0; i < num_share_modes; i++) {
- share_mode_entry *share_entry = &share_list[i];
+ if (!is_valid_share_mode_entry(share_entry)) {
+ 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
- * 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.
+ * 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
+ * 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,("release_level_2_oplocks_on_change: "
+ "share_entry[%i]->op_type == %d\n",
+ i, share_entry->op_type ));
- if (share_entry->op_type == NO_OPLOCK)
+ if (share_entry->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 ));
- unlock_share_entry(fsp->conn, fsp->dev, fsp->inode);
+ DEBUG(0,("release_level_2_oplocks_on_change: PANIC. "
+ "share mode entry %d is an exlusive "
+ "oplock !\n", i ));
+ TALLOC_FREE(lck);
abort();
}
- /*
- * Check if this is a file we have open (including the
- * file we've been called to do write_file on. If so
- * then break it directly without releasing the lock.
- */
+ share_mode_entry_to_message(msg, share_entry);
- if (pid == share_entry->pid) {
- files_struct *new_fsp = file_find_dif(share_entry->dev, share_entry->inode, share_entry->share_file_id);
-
- /* Paranoia check... */
- if(new_fsp == NULL) {
- DEBUG(0,("release_level_2_oplocks_on_change: PANIC. share mode entry %d is not a local file !\n", i ));
- unlock_share_entry(fsp->conn, fsp->dev, fsp->inode);
- abort();
- }
-
- DEBUG(10,("release_level_2_oplocks_on_change: breaking our own oplock.\n"));
+ messaging_send_buf(smbd_messaging_context(), share_entry->pid,
+ MSG_SMB_ASYNC_LEVEL2_BREAK,
+ (uint8 *)msg,
+ MSG_SMB_SHARE_MODE_ENTRY_SIZE);
+ }
- oplock_break_level2(new_fsp, True, token);
+ /* We let the message receivers handle removing the oplock state
+ in the share mode lock db. */
- } else {
+ TALLOC_FREE(lck);
+}
- /*
- * This is a remote file and so we send an asynchronous
- * message.
- */
+/****************************************************************************
+ Linearize a share mode entry struct to an internal oplock break message.
+****************************************************************************/
- DEBUG(10,("release_level_2_oplocks_on_change: breaking remote oplock.\n"));
- request_oplock_break(share_entry);
- }
- }
+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
+}
- SAFE_FREE(share_list);
- unlock_share_entry_fsp(fsp);
+/****************************************************************************
+ De-linearize an internal oplock break message to a share mode entry struct.
+****************************************************************************/
- /* Paranoia check... */
- if (LEVEL_II_OPLOCK_TYPE(fsp->oplock_type)) {
- DEBUG(0,("release_level_2_oplocks_on_change: PANIC. File %s still has a level II oplock.\n", fsp->fsp_name));
- smb_panic("release_level_2_oplocks_on_change");
- }
+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
}
/****************************************************************************
-setup oplocks for this process
+ Setup oplocks for this process.
****************************************************************************/
-BOOL init_oplocks(void)
+bool init_oplocks(struct messaging_context *msg_ctx)
{
- struct sockaddr_in sock_name;
- socklen_t len = sizeof(sock_name);
-
- DEBUG(3,("open_oplock_ipc: opening loopback UDP socket.\n"));
-
- /* Open a lookback UDP socket on a random port. */
- oplock_sock = open_socket_in(SOCK_DGRAM, 0, 0, htonl(INADDR_LOOPBACK),False);
- if (oplock_sock == -1) {
- DEBUG(0,("open_oplock_ipc: Failed to get local UDP socket for \
-address %lx. Error was %s\n", (long)htonl(INADDR_LOOPBACK), strerror(errno)));
- global_oplock_port = 0;
- return(False);
- }
-
- /* Find out the transient UDP port we have been allocated. */
- if(getsockname(oplock_sock, (struct sockaddr *)&sock_name, &len)<0) {
- DEBUG(0,("open_oplock_ipc: Failed to get local UDP port. Error was %s\n",
- strerror(errno)));
- close(oplock_sock);
- oplock_sock = -1;
- global_oplock_port = 0;
- return False;
- }
- global_oplock_port = ntohs(sock_name.sin_port);
+ DEBUG(3,("init_oplocks: initializing messages.\n"));
+
+ messaging_register(msg_ctx, NULL, MSG_SMB_BREAK_REQUEST,
+ process_oplock_break_message);
+ messaging_register(msg_ctx, NULL, 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,
+ process_kernel_oplock_break);
+ messaging_register(msg_ctx, NULL, MSG_SMB_OPEN_RETRY,
+ process_open_retry_message);
if (lp_kernel_oplocks()) {
#if HAVE_KERNEL_OPLOCKS_IRIX
#endif
}
- DEBUG(3,("open_oplock ipc: pid = %d, global_oplock_port = %u\n",
- (int)sys_getpid(), global_oplock_port));
-
return True;
}
git.samba.org / tprouty / samba.git / blobdiff