/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
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,
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#define DBGC_CLASS DBGC_LOCKING
#include "includes.h"
-extern int DEBUGLEVEL;
-
-/* 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;
+extern uint32 global_client_caps;
extern int smb_read_error;
static struct kernel_oplocks *koplocks;
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval, BOOL local);
-
/****************************************************************************
Get the number of current exclusive oplocks.
****************************************************************************/
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(fd_set *fds, char *buffer, int buffer_len, int timeout)
+void process_kernel_oplocks(struct messaging_context *msg_ctx, fd_set *pfds)
{
- struct sockaddr_in from;
- int fromlen = sizeof(from);
- int32 msg_len = 0;
-
- smb_read_error = 0;
-
- if(timeout != 0) {
- struct timeval to;
- int selrtn;
- int maxfd = oplock_sock;
-
- if (koplocks && koplocks->notification_fd != -1) {
- FD_SET(koplocks->notification_fd, fds);
- maxfd = MAX(maxfd, koplocks->notification_fd);
- }
-
- to.tv_sec = timeout / 1000;
- to.tv_usec = (timeout % 1000) * 1000;
-
- selrtn = sys_select(maxfd+1,fds,&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);
- }
- }
-
- /* 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 (koplocks && koplocks->msg_waiting(fds)) {
- return koplocks->receive_message(fds, buffer, buffer_len);
- }
-
- if (!FD_ISSET(oplock_sock, fds)) return False;
-
- /*
- * From here down we deal with the smbd <--> smbd
- * oplock break protocol only.
- */
-
- /*
- * Read a loopback udp message.
- */
- msg_len = 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;
- }
-
- /* 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;
+ /*
+ * 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);
+
+ if (fsp == NULL) {
+ DEBUG(3, ("Kernel oplock message announced, but none "
+ "received\n"));
+ return;
+ }
+
+ /* 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 (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, tv_sec = %x, tv_usec = %x\n",
- fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode,
- (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_static_string(&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) koplocks->release_oplock(fsp);
+ 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) koplocks->release_oplock(fsp);
+ 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(NULL, fsp->file_id, NULL, NULL);
+ if (lck == NULL) {
+ DEBUG(0,("remove_oplock: failed to lock share entry for "
+ "file %s\n", fsp->fsp_name ));
+ 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_static_string(&fsp->file_id)));
+ }
+ release_file_oplock(fsp);
+ TALLOC_FREE(lck);
+ return ret;
+}
- 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;
- }
+/*
+ * Deal with a reply when a break-to-level II was sent.
+ */
+BOOL downgrade_oplock(files_struct *fsp)
+{
+ BOOL ret;
+ struct share_mode_lock *lck;
- 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);
+ lck = get_share_mode_lock(NULL, fsp->file_id, 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_static_string(&fsp->file_id)));
}
- unlock_share_entry_fsp(fsp);
+ downgrade_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.
+ Return the fd (if any) used for receiving oplock notifications.
****************************************************************************/
-int setup_oplock_select_set( fd_set *fds)
+int oplock_notify_fd(void)
{
- 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);
+ if (koplocks) {
+ return koplocks->notification_fd;
}
- return maxfd;
+ return -1;
}
/****************************************************************************
- Process an oplock break message - whether it came from the UDP socket
- or from the kernel.
+ Set up an oplock break message.
****************************************************************************/
-BOOL process_local_message(char *buffer, int buf_size)
+
+static char *new_break_smb_message(TALLOC_CTX *mem_ctx,
+ files_struct *fsp, uint8 cmd)
{
- int32 msg_len;
- uint16 from_port;
- char *msg_start;
- SMB_DEV_T dev;
- SMB_INO_T inode;
- pid_t remotepid;
- struct timeval tval;
- struct timeval *ptval = NULL;
- 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)) {
- 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;
- }
- {
- long usec;
- time_t sec;
-
- memcpy((char *)&inode, msg_start+OPLOCK_BREAK_INODE_OFFSET,sizeof(inode));
- memcpy((char *)&dev, msg_start+OPLOCK_BREAK_DEV_OFFSET,sizeof(dev));
- memcpy((char *)&sec, msg_start+OPLOCK_BREAK_SEC_OFFSET,sizeof(sec));
- tval.tv_sec = sec;
- memcpy((char *)&usec, msg_start+OPLOCK_BREAK_USEC_OFFSET, sizeof(usec));
- tval.tv_usec = usec;
-
- ptval = &tval;
-
- memcpy((char *)&remotepid, msg_start+OPLOCK_BREAK_PID_OFFSET,sizeof(remotepid));
-
- DEBUG(5,("process_local_message: (%s) oplock break request from \
-pid %d, port %d, dev = %x, inode = %.0f\n",
- (break_cmd_type == OPLOCK_BREAK_CMD) ? "exclusive" : "level II",
- (int)remotepid, from_port, (unsigned int)dev, (double)inode));
- }
- 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));
-
- DEBUG(0,("process_local_message: unsolicited oplock break reply from \
-pid %d, port %d, dev = %x, inode = %.0f\n", (int)remotepid, from_port, (unsigned int)dev, (double)inode));
-
- }
- 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, ptval, 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"));
- }
-
- /*
- * 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(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\n",
- (int)remotepid, from_port, (unsigned int)dev, (double)inode));
- }
-
- return True;
+ 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);
+ set_message(NULL,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;
}
/****************************************************************************
- Set up an oplock break message.
+ Function to do the waiting before sending a local break.
****************************************************************************/
-static void prepare_break_message(char *outbuf, files_struct *fsp, BOOL level2)
+static void wait_before_sending_break(void)
{
- 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);
+ long wait_time = (long)lp_oplock_break_wait_time();
+
+ if (wait_time) {
+ smb_msleep(wait_time);
+ }
}
/****************************************************************************
- Function to do the waiting before sending a local break.
+ Ensure that we have a valid oplock.
****************************************************************************/
-static void wait_before_sending_break(BOOL local_request)
+static files_struct *initial_break_processing(struct file_id id, unsigned long file_id)
{
- extern struct timeval smb_last_time;
+ files_struct *fsp = NULL;
- if(local_request) {
- struct timeval cur_tv;
- long wait_left = (long)lp_oplock_break_wait_time();
+ if( DEBUGLVL( 3 ) ) {
+ dbgtext( "initial_break_processing: called for %s/%u\n",
+ file_id_static_string(&id), (int)file_id);
+ dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
+ exclusive_oplocks_open, level_II_oplocks_open );
+ }
- if (wait_left == 0)
- return;
+ /*
+ * We need to search the file open table for the
+ * entry containing this dev and inode, and ensure
+ * we have an oplock on it.
+ */
- GetTimeOfDay(&cur_tv);
+ fsp = file_find_dif(id, file_id);
- wait_left -= ((cur_tv.tv_sec - smb_last_time.tv_sec)*1000) +
- ((cur_tv.tv_usec - smb_last_time.tv_usec)/1000);
+ 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_static_string(&id), file_id);
+ dbgtext( "allowing break to succeed.\n" );
+ }
+ return NULL;
+ }
- if(wait_left > 0) {
- wait_left = MIN(wait_left, 1000);
- sys_usleep(wait_left * 1000);
- }
- }
+ /* Ensure we have an oplock on the file */
+
+ /*
+ * There is a potential race condition in that an oplock could
+ * have been broken due to another udp request, and yet there are
+ * still oplock break messages being sent in the udp message
+ * queue for this file. So return true if we don't have an oplock,
+ * as we may have just freed it.
+ */
+
+ if(fsp->oplock_type == NO_OPLOCK) {
+ if( DEBUGLVL( 3 ) ) {
+ dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
+ dbgtext( "(file_id = %s gen_id = %lu) has no oplock.\n",
+ file_id_static_string(&id), fsp->fh->gen_id );
+ dbgtext( "Allowing break to succeed regardless.\n" );
+ }
+ return NULL;
+ }
+
+ return fsp;
}
-/****************************************************************************
- Ensure that we have a valid oplock.
-****************************************************************************/
-static files_struct *initial_break_processing(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
+static void oplock_timeout_handler(struct event_context *ctx,
+ struct timed_event *te,
+ const struct timeval *now,
+ void *private_data)
{
- files_struct *fsp = NULL;
-
- if( DEBUGLVL( 3 ) )
- {
- dbgtext( "initial_break_processing: called for dev = %x, inode = %.0f tv_sec = %x, tv_usec = %x.\n",
- (unsigned int)dev, (double)inode, tval ? (int)tval->tv_sec : 0,
- tval ? (int)tval->tv_usec : 0);
- dbgtext( "Current oplocks_open (exclusive = %d, levelII = %d)\n",
- exclusive_oplocks_open, level_II_oplocks_open );
- }
-
- /* We need to search the file open table for the
- entry containing this dev and inode, and ensure
- we have an oplock on it. */
- fsp = file_find_dit(dev, inode, tval);
-
- 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 ", (unsigned int)dev, (double)inode);
- dbgtext( "allowing break to succeed.\n" );
- }
- return NULL;
- }
-
- /* Ensure we have an oplock on the file */
-
- /* There is a potential race condition in that an oplock could
- have been broken due to another udp request, and yet there are
- still oplock break messages being sent in the udp message
- queue for this file. So return true if we don't have an oplock,
- as we may have just freed it.
- */
-
- if(fsp->oplock_type == NO_OPLOCK)
- {
- if( DEBUGLVL( 3 ) )
- {
- dbgtext( "initial_break_processing: file %s ", fsp->fsp_name );
- dbgtext( "(dev = %x, inode = %.0f) has no oplock.\n", (unsigned int)dev, (double)inode );
- dbgtext( "Allowing break to succeed regardless.\n" );
- }
- return NULL;
- }
-
- return fsp;
+ 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);
}
-/****************************************************************************
- Process a level II oplock break directly.
-****************************************************************************/
+/*******************************************************************
+ Add a timeout handler waiting for the client reply.
+*******************************************************************/
-BOOL oplock_break_level2(files_struct *fsp, BOOL local_request, int token)
+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;
-
- /*
- * 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.
- */
-
- 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.
- */
-
- wait_before_sending_break(local_request);
-
- /* Prepare the SMBlockingX message. */
-
- prepare_break_message( outbuf, fsp, False);
- if (!send_smb(smbd_server_fd(), outbuf))
- exit_server("oplock_break_level2: send_smb failed.\n");
- }
-
- /*
- * 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.
- */
-
- 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;
- }
-
- 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 (!local_request && got_lock)
- unlock_share_entry_fsp(fsp);
-
- fsp->oplock_type = NO_OPLOCK;
- level_II_oplocks_open--;
-
- 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();
- }
-
- if( DEBUGLVL( 3 ) )
- {
- dbgtext( "oplock_break_level2: returning success for " );
- dbgtext( "dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
- dbgtext( "Current level II oplocks_open = %d\n", level_II_oplocks_open );
- }
-
- return True;
+ 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);
+
+ if (fsp->oplock_timeout == NULL) {
+ DEBUG(0, ("Could not add oplock timeout handler\n"));
+ }
}
-/****************************************************************************
- Process an oplock break directly.
-****************************************************************************/
+/*******************************************************************
+ 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;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
+
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
+ }
+
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
+
+ DEBUG(10, ("Got oplock async level 2 break message from pid %d: %s/%lu\n",
+ (int)procid_to_pid(&src), file_id_static_string(&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 (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);
+
+ /* 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 (!send_smb(smbd_server_fd(), break_msg)) {
+ exit_server_cleanly("oplock_break: 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);
+}
+
+/*******************************************************************
+ This handles the generic oplock break message from another smbd.
+*******************************************************************/
+
+static void process_oplock_break_message(struct messaging_context *msg_ctx,
+ void *private_data,
+ uint32_t msg_type,
+ struct server_id src,
+ DATA_BLOB *data)
+{
+ struct share_mode_entry msg;
+ files_struct *fsp;
+ char *break_msg;
+ BOOL break_to_level2 = False;
+ BOOL sign_state;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
+
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
+ }
+
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
+
+ DEBUG(10, ("Got oplock break message from pid %d: %s/%lu\n",
+ (int)procid_to_pid(&src), file_id_static_string(&msg.id), msg.share_file_id));
+
+ fsp = initial_break_processing(msg.id, msg.share_file_id);
+
+ 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"));
+
+ /* 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;
+ }
+
+ if (EXCLUSIVE_OPLOCK_TYPE(msg.op_type) &&
+ !EXCLUSIVE_OPLOCK_TYPE(fsp->oplock_type)) {
+ DEBUG(3, ("Already downgraded oplock on %s: %s\n",
+ file_id_static_string(&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) &&
+ !(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;
+ }
+
+ 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()) {
+ wait_before_sending_break();
+ }
+
+ /* Save the server smb signing state. */
+ sign_state = srv_oplock_set_signing(False);
+
+ show_msg(break_msg);
+ if (!send_smb(smbd_server_fd(), break_msg)) {
+ exit_server_cleanly("oplock_break: send_smb failed.");
+ }
+
+ /* Restore the sign state to what it was. */
+ srv_oplock_set_signing(sign_state);
+
+ TALLOC_FREE(break_msg);
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval, BOOL local_request)
+ 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);
+}
+
+/*******************************************************************
+ This handles the kernel oplock break message.
+*******************************************************************/
+
+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)
{
- 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, tval)) == NULL)
- return True;
-
- /*
- * Deal with a level II oplock going break to none separately.
- */
-
- if (LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
- return oplock_break_level2(fsp, local_request, -1);
-
- /* 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)\n", (unsigned int)dev, (double)inode );
- }
-
- /* 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;
- }
-
- if(global_oplock_break) {
- DEBUG(0,("ABORT : ABORT : recursion in oplock_break !!!!!\n"));
- abort();
- }
-
- /* 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.
- */
-
- 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;
- }
-
- 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;
- }
-
- /*
- * 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.
- */
-
- wait_before_sending_break(local_request);
-
- /* Prepare the SMBlockingX message. */
-
- 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;
- }
-
- 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;
-
- if (!send_smb(smbd_server_fd(), outbuf))
- exit_server("oplock_break: send_smb failed.\n");
-
- /* We need this in case a readraw crosses on the wire. */
- global_oplock_break = True;
-
- /* Process incoming messages. */
-
- /* JRA - If we don't get a break from the client in OPLOCK_BREAK_TIMEOUT
- seconds we should just die.... */
-
- start_time = time(NULL);
-
- /*
- * 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;
- vfs_GetWd(saved_fsp_conn,saved_dir);
- unbecome_user();
- /* Save the chain fnum. */
- file_chain_save();
-
- /*
- * 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.
- */
-
- pstrcpy(file_name, fsp->fsp_name);
-
- while((fsp = initial_break_processing(dev, inode, tval)) &&
- 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).\n", (unsigned int)dev, (double)inode));
-
- break;
- }
-
- /*
- * 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.
- */
-
- process_smb(inbuf, outbuf);
-
- /*
- * Die if we go over the time limit.
- */
-
- 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).\n", (unsigned int)dev, (double)inode );
- }
- oplock_timeout = True;
- break;
- }
- }
-
- /*
- * Go back to being the user who requested the oplock
- * break.
- */
- if((saved_user_conn != NULL) && (saved_vuid != UID_FIELD_INVALID) && !become_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");
- }
- /* Including the directory. */
- vfs_ChDir(saved_fsp_conn,saved_dir);
-
- /* Restore the chain fnum. */
- file_chain_restore();
-
- /* Free the buffers we've been using to recurse. */
- SAFE_FREE(inbuf);
- SAFE_FREE(outbuf);
-
- /* 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, tval)) &&
- 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);
- global_client_failed_oplock_break = True; /* Never grant this client an oplock again. */
- }
-
- /*
- * 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");
- }
-
- /* 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();
- }
-
- if( DEBUGLVL( 3 ) )
- {
- dbgtext( "oplock_break: returning success for " );
- dbgtext( "dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
- dbgtext( "Current exclusive_oplocks_open = %d\n", exclusive_oplocks_open );
- }
-
- return True;
+ struct file_id id;
+ unsigned long file_id;
+ files_struct *fsp;
+ char *break_msg;
+ BOOL sign_state;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
+
+ if (data->length != MSG_SMB_KERNEL_BREAK_SIZE) {
+ DEBUG(0, ("Got invalid msg len %d\n", (int)data->length));
+ return;
+ }
+
+ /* Pull the data from the message. */
+ pull_file_id_16((char *)data->data, &id);
+ file_id = (unsigned long)IVAL(data->data, 16);
+
+ DEBUG(10, ("Got kernel oplock break message from pid %d: %s/%u\n",
+ (int)procid_to_pid(&src), file_id_static_string(&id),
+ (unsigned int)file_id));
+
+ fsp = initial_break_processing(id, file_id);
+
+ if (fsp == NULL) {
+ DEBUG(3, ("Got a kernel oplock break message for a file "
+ "I don't know about\n"));
+ return;
+ }
+
+ 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;
+ }
+
+ 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 (!send_smb(smbd_server_fd(), break_msg)) {
+ exit_server_cleanly("oplock_break: send_smb failed.");
+ }
+
+ /* 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);
}
-/****************************************************************************
-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.
-****************************************************************************/
+void reply_to_oplock_break_requests(files_struct *fsp)
+{
+ int i;
+
+ 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];
-BOOL request_oplock_break(share_mode_entry *share_entry,
- SMB_DEV_T dev, SMB_INO_T inode)
+ share_mode_entry_to_message(msg, e);
+
+ messaging_send_buf(smbd_messaging_context(), 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)
{
- 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;
- long usec;
- time_t sec;
-
- 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;
- }
-
- DEBUG(5,("request_oplock_break: breaking our own oplock\n"));
-
-#if 1 /* JRA PARANOIA TEST.... */
- {
- files_struct *fsp = file_find_dit(dev, inode, &share_entry->time);
- if (!fsp) {
- DEBUG(0,("request_oplock_break: PANIC : breaking our own oplock requested for \
-dev = %x, inode = %.0f, tv_sec = %x, tv_usec = %x and no fsp found !\n",
- (unsigned int)dev, (double)inode, (int)share_entry->time.tv_sec,
- (int)share_entry->time.tv_usec ));
- smb_panic("request_oplock_break: no fsp found for our own oplock\n");
- }
- }
-#endif /* END JRA PARANOIA TEST... */
-
- /* Call oplock break direct. */
- return oplock_break(dev, inode, &share_entry->time, True);
- }
-
- /* We need to send a OPLOCK_BREAK_CMD message to the
- port in the share mode entry. */
-
- 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));
- sec = (time_t)share_entry->time.tv_sec;
- memcpy(op_break_msg+OPLOCK_BREAK_SEC_OFFSET,(char *)&sec,sizeof(sec));
- usec = (long)share_entry->time.tv_usec;
- memcpy(op_break_msg+OPLOCK_BREAK_USEC_OFFSET,(char *)&usec,sizeof(usec));
- memcpy(op_break_msg+OPLOCK_BREAK_DEV_OFFSET,(char *)&dev,sizeof(dev));
- memcpy(op_break_msg+OPLOCK_BREAK_INODE_OFFSET,(char *)&inode,sizeof(inode));
-
- /* 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, tv_sec = %x, tv_usec = %x\n",
- (unsigned int)dev, (double)inode, (int)share_entry->time.tv_sec,
- (int)share_entry->time.tv_usec );
-
- }
-
- if(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, tv_sec = %x, tv_usec = %x\n",
- (unsigned int)dev, (double)inode, (int)share_entry->time.tv_sec,
- (int)share_entry->time.tv_usec );
- dbgtext( "Error was %s\n", strerror(errno) );
- }
- return False;
- }
-
- /*
- * If we just sent a message to a level II oplock share entry then
- * we are done and may return.
- */
-
- if (LEVEL_II_OPLOCK_TYPE(share_entry->op_type)) {
- DEBUG(3,("request_oplock_break: sent break message to level II entry.\n"));
- return True;
- }
-
- /*
- * 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;
- fd_set fds;
-
- FD_ZERO(&fds);
- FD_SET(oplock_sock,&fds);
-
- if (koplocks && koplocks->notification_fd != -1) {
- FD_SET(koplocks->notification_fd, &fds);
- }
-
- if(receive_local_message(&fds, 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\n", (unsigned int)dev, (double)inode );
- dbgtext( "for dev = %x, inode = %.0f, tv_sec = %x, tv_usec = %x\n",
- (unsigned int)dev, (double)inode, (int)share_entry->time.tv_sec,
- (int)share_entry->time.tv_usec );
- }
-
- /*
- * 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, tv_sec = %x, tv_usec = %x\n",
- (unsigned int)dev, (double)inode, (int)share_entry->time.tv_sec,
- (int)share_entry->time.tv_usec );
- 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);
- }
-
- DEBUG(3,("request_oplock_break: broke oplock.\n"));
-
- return True;
+ struct share_mode_entry msg;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
+
+ if (data->length != MSG_SMB_SHARE_MODE_ENTRY_SIZE) {
+ DEBUG(0, ("Got invalid msg len %u\n",
+ (unsigned int)data->length));
+ return;
+ }
+
+ /* De-linearize incoming message. */
+ message_to_share_mode_entry(&msg, (char *)data->data);
+
+ DEBUG(10, ("Got oplock break response from pid %d: %s/%lu mid %u\n",
+ (int)procid_to_pid(&src), file_id_static_string(&msg.id), msg.share_file_id,
+ (unsigned int)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);
}
-/****************************************************************************
- 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.
-****************************************************************************/
-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)
{
+ struct share_mode_entry msg;
+
+ if (data->data == NULL) {
+ DEBUG(0, ("Got NULL buffer\n"));
+ return;
+ }
- DEBUG(5,("attempt_close_oplocked_file: checking file %s.\n", fsp->fsp_name));
+ 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);
- 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->open_time, True)) {
- if(file_find_fsp(fsp) == NULL) /* Did the oplock break close the file ? */
- return True;
- }
- }
+ DEBUG(10, ("Got open retry msg from pid %d: %s mid %u\n",
+ (int)procid_to_pid(&src), file_id_static_string(&msg.id),
+ (unsigned int)msg.op_mid));
- return False;
+ 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(NULL, fsp->file_id, 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.
- */
-
- if (pid == share_entry->pid) {
- files_struct *new_fsp = file_find_dit(fsp->dev, fsp->inode, &share_entry->time);
+ share_mode_entry_to_message(msg, share_entry);
- /* 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, fsp->dev, fsp->inode);
- }
- }
+void share_mode_entry_to_message(char *msg, 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)
-{
- 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);
+BOOL init_oplocks(struct messaging_context *msg_ctx)
+{
+ 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 / gd / samba / .git / blobdiff