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Diffstat (limited to 'source3/smbd/oplock.c')
-rw-r--r--source3/smbd/oplock.c618
1 files changed, 477 insertions, 141 deletions
diff --git a/source3/smbd/oplock.c b/source3/smbd/oplock.c
index 94e8559d2a..0cd6f0bef6 100644
--- a/source3/smbd/oplock.c
+++ b/source3/smbd/oplock.c
@@ -24,22 +24,21 @@
extern int DEBUGLEVEL;
/* Oplock ipc UDP socket. */
-int oplock_sock = -1;
-uint16 oplock_port = 0;
+static int oplock_sock = -1;
+uint16 global_oplock_port = 0;
#if defined(HAVE_KERNEL_OPLOCKS)
-static int oplock_pipes[2];
+static int oplock_pipe_read = -1;
+static int oplock_pipe_write = -1;
#endif /* HAVE_KERNEL_OPLOCKS */
/* Current number of oplocks we have outstanding. */
int32 global_oplocks_open = 0;
BOOL global_oplock_break = False;
-
extern int smb_read_error;
static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval);
-
/****************************************************************************
open the oplock IPC socket communication
****************************************************************************/
@@ -56,7 +55,7 @@ BOOL open_oplock_ipc(void)
{
DEBUG(0,("open_oplock_ipc: Failed to get local UDP socket for \
address %x. Error was %s\n", htonl(INADDR_LOOPBACK), strerror(errno)));
- oplock_port = 0;
+ global_oplock_port = 0;
return(False);
}
@@ -67,39 +66,332 @@ address %x. Error was %s\n", htonl(INADDR_LOOPBACK), strerror(errno)));
strerror(errno)));
close(oplock_sock);
oplock_sock = -1;
- oplock_port = 0;
+ global_oplock_port = 0;
+ return False;
+ }
+ global_oplock_port = ntohs(sock_name.sin_port);
+
+ DEBUG(3,("open_oplock ipc: pid = %d, global_oplock_port = %u\n",
+ (int)getpid(), global_oplock_port));
+
+ return True;
+}
+
+/****************************************************************************
+ Read an oplock break message from the either the oplock UDP fd
+ or the kernel oplock pipe fd (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
+
+****************************************************************************/
+
+BOOL receive_local_message(fd_set *fds, char *buffer, int buffer_len, int timeout)
+{
+ 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 defined(HAVE_KERNEL_OPLOCKS)
+ if(lp_kernel_oplocks())
+ maxfd = MAX(maxfd, oplock_pipe_read);
+#endif /* HAVE_KERNEL_OPLOCKS */
+
+ to.tv_sec = timeout / 1000;
+ to.tv_usec = (timeout % 1000) * 1000;
+
+ selrtn = sys_select(maxfd+1,fds,&to);
+
+ /* 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 defined(HAVE_KERNEL_OPLOCKS)
+ if(FD_ISSET(oplock_pipe_read,fds)) {
+ /*
+ * Deal with the kernel <--> smbd
+ * oplock break protocol.
+ */
+
+ oplock_stat_t os;
+ SMB_DEV_T dev;
+ SMB_INO_T inode;
+ char dummy;
+
+ /*
+ * Read one byte of zero to clear the
+ * kernel break notify message.
+ */
+
+ if(read(oplock_pipe_read, &dummy, 1) != 1) {
+ DEBUG(0,("receive_local_message: read of kernel notification failed. \
+Error was %s.\n", strerror(errno) ));
+ smb_read_error = READ_ERROR;
+ return False;
+ }
+
+ /*
+ * Do a query to get the
+ * device and inode of the file that has the break
+ * request outstanding.
+ */
+
+ if(fcntl(oplock_pipe_read, F_OPLKSTAT, &os) < 0) {
+ DEBUG(0,("receive_local_message: fcntl of kernel notification failed. \
+Error was %s.\n", strerror(errno) ));
+ smb_read_error = READ_ERROR;
+ return False;
+ }
+
+ dev = (SMB_DEV_T)os.os_dev;
+ inode = (SMB_DEV_T)os.os_ino;
+
+ DEBUG(5,("receive_local_message: kernel oplock break request received for \
+dev = %x, inode = %0.f\n", (unsigned int)dev, (double)inode ));
+
+ /*
+ * Create a kernel oplock break message.
+ */
+
+ /* Setup the message header */
+ SIVAL(buffer,OPBRK_CMD_LEN_OFFSET,KERNEL_OPLOCK_BREAK_MSG_LEN);
+ SSVAL(buffer,OPBRK_CMD_PORT_OFFSET,0);
+
+ buffer += OPBRK_CMD_HEADER_LEN;
+
+ SSVAL(buffer,OPBRK_MESSAGE_CMD_OFFSET,KERNEL_OPLOCK_BREAK_CMD);
+ SIVAL(buffer,KERNEL_OPLOCK_BREAK_DEV_OFFSET,dev);
+
+#ifdef LARGE_SMB_INO_T
+ SIVAL(buffer,KERNEL_OPLOCK_BREAK_INODE_OFFSET,inode & 0xFFFFFFFF);
+ SIVAL(buffer,KERNEL_OPLOCK_BREAK_INODE_OFFSET+4, (inode >> 32 ) & 0xFFFFFFFF );
+#else /* LARGE_SMB_INO_T */
+ SIVAL(buffer,KERNEL_OPLOCK_BREAK_INODE_OFFSET,inode);
+#endif /* LARGE_SMB_INO_T */
+
+ return True;
+ }
+#endif /* HAVE_KERNEL_OPLOCKS */
+
+ /*
+ * 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;
}
- oplock_port = ntohs(sock_name.sin_port);
- DEBUG(3,("open_oplock ipc: pid = %d, oplock_port = %u\n",
- (int)getpid(), oplock_port));
+ /* 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 %x should be 127.0.0.1\n", 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;
+}
+
+/****************************************************************************
+ 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)
+{
+#if defined(HAVE_KERNEL_OPLOCKS)
+ if(lp_kernel_oplocks()) {
+ if(fcntl(fsp->fd_ptr->fd, F_OPLKREG, oplock_pipe_write) < 0) {
+ if(errno != EAGAIN) {
+ DEBUG(0,("set_file_oplock: Unable to get kernel oplock on file %s, dev = %x, \
+inode = %0.f. Error was %s\n",
+ fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev, (double)fsp->fd_ptr->inode,
+ strerror(errno) ));
+ } else {
+ DEBUG(5,("set_file_oplock: Refused oplock on file %s, dev = %x, \
+inode = %0.f. Another process had the file open.\n",
+ fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev, (double)fsp->fd_ptr->inode ));
+ }
+ return False;
+ }
+ }
+#endif /* HAVE_KERNEL_OPLOCKS */
+
+ DEBUG(5,("set_file_oplock: granted oplock on file %s, dev = %x, inode = %.0f\n",
+ fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev, (double)fsp->fd_ptr->inode));
+
+ fsp->granted_oplock = True;
+ fsp->sent_oplock_break = False;
+ global_oplocks_open++;
return True;
}
/****************************************************************************
- process an oplock break message.
+ Attempt to release an oplock on a file. Always succeeds if kernel oplocks are
+ disabled (just clears flags).
+****************************************************************************/
+
+static void release_file_oplock(files_struct *fsp)
+{
+#if defined(HAVE_KERNEL_OPLOCKS)
+ if(fsp->granted_oplock && lp_kernel_oplocks())
+ {
+ if( DEBUGLVL( 10 ))
+ {
+ /*
+ * Check and print out the current kernel
+ * oplock state of this file.
+ */
+ int state = fcntl(fsp->fd_ptr->fd, F_OPLKACK, -1);
+ dbgtext("release_file_oplock: file %s, dev = %x, inode = %.0f has kernel \
+oplock state of %x.\n", fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev,
+ (double)fsp->fd_ptr->inode, state );
+ }
+
+ /*
+ * Remove the kernel oplock on this file.
+ */
+
+ if(fcntl(fsp->fd_ptr->fd, F_OPLKACK, OP_REVOKE) < 0)
+ {
+ if( DEBUGLVL( 0 ))
+ {
+ dbgtext("release_file_oplock: Error when removing kernel oplock on file " );
+ dbgtext("%s, dev = %x, inode = %.0f. Error was %s\n",
+ fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev,
+ (double)fsp->fd_ptr->inode, strerror(errno) );
+ }
+ }
+ }
+#endif /* HAVE_KERNEL_OPLOCKS */
+
+ fsp->granted_oplock = False;
+ fsp->sent_oplock_break = False;
+ global_oplocks_open--;
+}
+
+/****************************************************************************
+ 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)
+{
+ int maxfd = oplock_sock;
+ FD_SET(oplock_sock,fds);
+
+#if defined(HAVE_KERNEL_OPLOCKS)
+ if(lp_kernel_oplocks()) {
+ FD_SET(oplock_pipe_read,fds);
+ maxfd = MAX(maxfd,oplock_pipe_read);
+ }
+#endif /* HAVE_KERNEL_OPLOCKS */
+
+ return maxfd;
+}
+
+/****************************************************************************
+ Process an oplock break message - whether it came from the UDP socket
+ or from the kernel.
****************************************************************************/
-BOOL process_local_message(int sock, char *buffer, int buf_size)
+
+BOOL process_local_message(char *buffer, int buf_size)
{
int32 msg_len;
uint16 from_port;
char *msg_start;
+ SMB_DEV_T dev;
+ SMB_INO_T inode;
+ uint32 remotepid;
+ struct timeval tval;
+ struct timeval *ptval = NULL;
- msg_len = IVAL(buffer,UDP_CMD_LEN_OFFSET);
- from_port = SVAL(buffer,UDP_CMD_PORT_OFFSET);
+ msg_len = IVAL(buffer,OPBRK_CMD_LEN_OFFSET);
+ from_port = SVAL(buffer,OPBRK_CMD_PORT_OFFSET);
- msg_start = &buffer[UDP_CMD_HEADER_LEN];
+ 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));
- /* Switch on message command - currently OPLOCK_BREAK_CMD is the
- only valid request. */
+ /*
+ * Pull the info out of the requesting packet.
+ */
- switch(SVAL(msg_start,UDP_MESSAGE_CMD_OFFSET))
+ switch(SVAL(msg_start,OPBRK_MESSAGE_CMD_OFFSET))
{
+#if defined(HAVE_KERNEL_OPLOCKS)
+ case KERNEL_OPLOCK_BREAK_CMD:
+ /* Ensure that the msg length is correct. */
+ if(msg_len != KERNEL_OPLOCK_BREAK_MSG_LEN)
+ {
+ DEBUG(0,("process_local_message: incorrect length for KERNEL_OPLOCK_BREAK_CMD (was %d, \
+should be %d).\n", msg_len, KERNEL_OPLOCK_BREAK_MSG_LEN));
+ return False;
+ }
+ {
+ /*
+ * Warning - beware of SMB_INO_T <> 4 bytes. !!
+ */
+#ifdef LARGE_SMB_INO_T
+ SMB_INO_T inode_low = IVAL(msg_start, KERNEL_OPLOCK_BREAK_INODE_OFFSET);
+ SMB_INO_T inode_high = IVAL(msg_start, KERNEL_OPLOCK_BREAK_INODE_OFFSET + 4);
+ inode = inode_low | (inode_high << 32);
+#else /* LARGE_SMB_INO_T */
+ inode = IVAL(msg_start, KERNEL_OPLOCK_BREAK_INODE_OFFSET);
+#endif /* LARGE_SMB_INO_T */
+
+ dev = IVAL(msg_start,KERNEL_OPLOCK_BREAK_DEV_OFFSET);
+
+ ptval = NULL;
+
+ DEBUG(5,("process_local_message: kernel oplock break request for \
+file dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode));
+ }
+ break;
+#endif /* HAVE_KERNEL_OPLOCKS */
+
case OPLOCK_BREAK_CMD:
/* Ensure that the msg length is correct. */
if(msg_len != OPLOCK_BREAK_MSG_LEN)
@@ -109,71 +401,31 @@ should be %d).\n", msg_len, OPLOCK_BREAK_MSG_LEN));
return False;
}
{
- uint32 remotepid = IVAL(msg_start,OPLOCK_BREAK_PID_OFFSET);
- SMB_DEV_T dev = IVAL(msg_start,OPLOCK_BREAK_DEV_OFFSET);
/*
* Warning - beware of SMB_INO_T <> 4 bytes. !!
*/
#ifdef LARGE_SMB_INO_T
SMB_INO_T inode_low = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
SMB_INO_T inode_high = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET + 4);
- SMB_INO_T inode = inode_low | (inode_high << 32);
+ inode = inode_low | (inode_high << 32);
#else /* LARGE_SMB_INO_T */
- SMB_INO_T inode = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
+ inode = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
#endif /* LARGE_SMB_INO_T */
- struct timeval tval;
- struct sockaddr_in toaddr;
+
+ dev = IVAL(msg_start,OPLOCK_BREAK_DEV_OFFSET);
tval.tv_sec = IVAL(msg_start, OPLOCK_BREAK_SEC_OFFSET);
tval.tv_usec = IVAL(msg_start, OPLOCK_BREAK_USEC_OFFSET);
- DEBUG(5,("process_local_message: oplock break request from \
-pid %d, port %d, dev = %x, inode = %.0f\n", remotepid, from_port, (unsigned int)dev, (double)inode));
-
- /*
- * 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 return success in this case.
- */
-
- if(global_oplocks_open != 0)
- {
- if(oplock_break(dev, inode, &tval) == False)
- {
- DEBUG(0,("process_local_message: oplock break failed - \
-not returning udp message.\n"));
- return False;
- }
- }
- else
- {
- DEBUG(3,("process_local_message: oplock break requested with no outstanding \
-oplocks. Returning success.\n"));
- }
-
- /* Send the message back after OR'ing in the 'REPLY' bit. */
- SSVAL(msg_start,UDP_MESSAGE_CMD_OFFSET,OPLOCK_BREAK_CMD | CMD_REPLY);
-
- bzero((char *)&toaddr,sizeof(toaddr));
- toaddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
- toaddr.sin_port = htons(from_port);
- toaddr.sin_family = AF_INET;
-
- if(sendto( 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",
- remotepid, strerror(errno)));
- return False;
- }
+ ptval = &tval;
- DEBUG(5,("process_local_message: oplock break reply sent to \
-pid %d, port %d, for file dev = %x, inode = %.0f\n",
- remotepid, from_port, (unsigned int)dev, (double)inode));
+ remotepid = IVAL(msg_start,OPLOCK_BREAK_PID_OFFSET);
+ DEBUG(5,("process_local_message: oplock break request from \
+pid %d, port %d, dev = %x, inode = %.0f\n", remotepid, from_port, (unsigned int)dev, (double)inode));
}
break;
+
/*
* Keep this as a debug case - eventually we can remove it.
*/
@@ -189,19 +441,20 @@ reply - dumping info.\n"));
}
{
- uint32 remotepid = IVAL(msg_start,OPLOCK_BREAK_PID_OFFSET);
- SMB_DEV_T dev = IVAL(msg_start,OPLOCK_BREAK_DEV_OFFSET);
/*
* Warning - beware of SMB_INO_T <> 4 bytes. !!
*/
#ifdef LARGE_SMB_INO_T
SMB_INO_T inode_low = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
SMB_INO_T inode_high = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET + 4);
- SMB_INO_T inode = inode_low | (inode_high << 32);
+ inode = inode_low | (inode_high << 32);
#else /* LARGE_SMB_INO_T */
- SMB_INO_T inode = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
+ inode = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
#endif /* LARGE_SMB_INO_T */
+ remotepid = IVAL(msg_start,OPLOCK_BREAK_PID_OFFSET);
+ dev = IVAL(msg_start,OPLOCK_BREAK_DEV_OFFSET);
+
DEBUG(0,("process_local_message: unsolicited oplock break reply from \
pid %d, port %d, dev = %x, inode = %.0f\n", remotepid, from_port, (unsigned int)dev, (double)inode));
@@ -213,12 +466,67 @@ pid %d, port %d, dev = %x, inode = %.0f\n", remotepid, from_port, (unsigned int)
(unsigned int)SVAL(msg_start,0)));
return False;
}
+
+ /*
+ * Now actually process the break request.
+ */
+
+ if(global_oplocks_open != 0)
+ {
+ if(oplock_break(dev, inode, ptval) == 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 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);
+
+ bzero((char *)&toaddr,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",
+ 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",
+ remotepid, from_port, (unsigned int)dev, (double)inode));
+ }
+
return True;
}
/****************************************************************************
Process an oplock break directly.
****************************************************************************/
+
static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
{
extern struct current_user current_user;
@@ -233,10 +541,10 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
pstring saved_dir;
if( DEBUGLVL( 3 ) )
- {
+ {
dbgtext( "oplock_break: called for dev = %x, inode = %.0f.\n", (unsigned int)dev, (double)inode );
dbgtext( "Current global_oplocks_open = %d\n", global_oplocks_open );
- }
+ }
/* We need to search the file open table for the
entry containing this dev and inode, and ensure
@@ -247,11 +555,11 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
{
/* The file could have been closed in the meantime - return success. */
if( DEBUGLVL( 0 ) )
- {
+ {
dbgtext( "oplock_break: cannot find open file with " );
dbgtext( "dev = %x, inode = %.0f ", (unsigned int)dev, (double)inode);
dbgtext( "allowing break to succeed.\n" );
- }
+ }
return True;
}
@@ -267,11 +575,11 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
if(!fsp->granted_oplock)
{
if( DEBUGLVL( 0 ) )
- {
+ {
dbgtext( "oplock_break: 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 True;
}
@@ -279,11 +587,11 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
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
@@ -403,7 +711,6 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
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 );
-
}
shutdown_server = True;
break;
@@ -453,10 +760,7 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
{
/* The lockingX reply will have removed the oplock flag
from the sharemode. */
- /* Paranoia.... */
- fsp->granted_oplock = False;
- fsp->sent_oplock_break = False;
- global_oplocks_open--;
+ release_file_oplock(fsp);
}
/* Santity check - remove this later. JRA */
@@ -467,12 +771,13 @@ static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
exit_server("oplock_break: global_oplocks_open < 0");
}
+
if( DEBUGLVL( 3 ) )
- {
+ {
dbgtext( "oplock_break: returning success for " );
dbgtext( "dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
dbgtext( "Current global_oplocks_open = %d\n", global_oplocks_open );
- }
+ }
return True;
}
@@ -494,10 +799,10 @@ BOOL request_oplock_break(share_mode_entry *share_entry,
if(pid == share_entry->pid)
{
/* We are breaking our own oplock, make sure it's us. */
- if(share_entry->op_port != oplock_port)
+ 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", pid, share_entry->op_port, oplock_port));
+should be %d\n", pid, share_entry->op_port, global_oplock_port));
return False;
}
@@ -510,7 +815,7 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
/* We need to send a OPLOCK_BREAK_CMD message to the
port in the share mode entry. */
- SSVAL(op_break_msg,UDP_MESSAGE_CMD_OFFSET,OPLOCK_BREAK_CMD);
+ SSVAL(op_break_msg,OPBRK_MESSAGE_CMD_OFFSET,OPLOCK_BREAK_CMD);
SIVAL(op_break_msg,OPLOCK_BREAK_PID_OFFSET,pid);
SIVAL(op_break_msg,OPLOCK_BREAK_SEC_OFFSET,(uint32)share_entry->time.tv_sec);
SIVAL(op_break_msg,OPLOCK_BREAK_USEC_OFFSET,(uint32)share_entry->time.tv_usec);
@@ -532,24 +837,23 @@ should be %d\n", pid, share_entry->op_port, oplock_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 ", share_entry->pid, share_entry->op_port );
dbgtext( "for dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
-
- }
+ }
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 ", share_entry->pid );
dbgtext( "on port %d ", share_entry->op_port );
dbgtext( "for dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
dbgtext( "Error was %s\n", strerror(errno) );
- }
+ }
return False;
}
@@ -565,24 +869,32 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
while(time_left >= 0)
{
- char op_break_reply[UDP_CMD_HEADER_LEN+OPLOCK_BREAK_MSG_LEN];
+ char op_break_reply[OPBRK_CMD_HEADER_LEN+OPLOCK_BREAK_MSG_LEN];
int32 reply_msg_len;
uint16 reply_from_port;
char *reply_msg_start;
+ fd_set fds;
+
+ FD_ZERO(&fds);
+ FD_SET(oplock_sock,&fds);
+#if defined(HAVE_KERNEL_OPLOCKS)
+ if(lp_kernel_oplocks())
+ FD_SET(oplock_pipe_read,&fds);
+#endif /* HAVE_KERNEL_OPLOCKS */
- if(receive_local_message(oplock_sock, op_break_reply, sizeof(op_break_reply),
+ 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 ", share_entry->pid );
dbgtext( "on port %d ", share_entry->op_port );
dbgtext( "for dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
+ }
- }
/*
* This is a hack to make handling of failing clients more robust.
* If a oplock break response message is not received in the timeout
@@ -594,25 +906,30 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
}
else
if( DEBUGLVL( 0 ) )
- {
+ {
dbgtext( "request_oplock_break: error in response received " );
dbgtext( "to oplock break request to pid %d ", share_entry->pid );
dbgtext( "on port %d ", share_entry->op_port );
dbgtext( "for dev = %x, inode = %.0f\n", (unsigned int)dev, (double)inode );
dbgtext( "Error was (%s).\n", strerror(errno) );
- }
+ }
return False;
}
- reply_msg_len = IVAL(op_break_reply,UDP_CMD_LEN_OFFSET);
- reply_from_port = SVAL(op_break_reply,UDP_CMD_PORT_OFFSET);
+ reply_msg_len = IVAL(op_break_reply,OPBRK_CMD_LEN_OFFSET);
+ reply_from_port = SVAL(op_break_reply,OPBRK_CMD_PORT_OFFSET);
+
+ reply_msg_start = &op_break_reply[OPBRK_CMD_HEADER_LEN];
- reply_msg_start = &op_break_reply[UDP_CMD_HEADER_LEN];
+#if defined(HAVE_KERNEL_OPLOCKS)
+ if((reply_msg_len != OPLOCK_BREAK_MSG_LEN) && (reply_msg_len != KERNEL_OPLOCK_BREAK_MSG_LEN))
+#else
if(reply_msg_len != OPLOCK_BREAK_MSG_LEN)
+#endif
{
/* Ignore it. */
- DEBUG( 0, ( "request_oplock_break: invalid message length received." ) );
+ DEBUG( 0, ( "request_oplock_break: invalid message length (%d) received.", reply_msg_len ) );
DEBUGADD( 0, ( " Ignoring.\n" ) );
continue;
}
@@ -621,7 +938,8 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
* Test to see if this is the reply we are awaiting.
*/
- if((SVAL(reply_msg_start,UDP_MESSAGE_CMD_OFFSET) & CMD_REPLY) &&
+ 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],
@@ -635,7 +953,11 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
else
{
/*
- * This is another message - probably a break request.
+ * 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
@@ -644,7 +966,7 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
* JRA.
*/
- process_local_message(oplock_sock, op_break_reply, sizeof(op_break_reply));
+ process_local_message(op_break_reply, sizeof(op_break_reply));
}
time_left -= (time(NULL) - start_time);
@@ -655,7 +977,6 @@ should be %d\n", pid, share_entry->op_port, oplock_port));
return True;
}
-
/****************************************************************************
Attempt to break an oplock on a file (if oplocked).
Returns True if the file was closed as a result of
@@ -681,12 +1002,13 @@ BOOL attempt_close_oplocked_file(files_struct *fsp)
return False;
}
-void check_kernel_oplocks(BOOL *have_oplocks)
+/****************************************************************************
+ Init function to check if kernel level oplocks are available.
+****************************************************************************/
+
+void check_kernel_oplocks(void)
{
static BOOL done;
- int fd;
- int pfd[2];
- pstring tmpname;
/*
* We only do this check once on startup.
@@ -696,45 +1018,59 @@ void check_kernel_oplocks(BOOL *have_oplocks)
return;
done = True;
- *have_oplocks = False;
+ lp_set_kernel_oplocks(False);
#if defined(HAVE_KERNEL_OPLOCKS)
- slprintf( tmpname, sizeof(tmpname)-1, "/tmp/ot.%d.XXXXXX", getpid());
- mktemp(tmpname);
+ {
+ int fd;
+ int pfd[2];
+ pstring tmpname;
- if(pipe(pfd) != 0) {
- DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
- strerror(errno) ));
- return;
- }
+ slprintf( tmpname, sizeof(tmpname)-1, "/tmp/ot.%d.XXXXXX", getpid());
+ mktemp(tmpname);
+
+ if(pipe(pfd) != 0) {
+ DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
+ strerror(errno) ));
+ return;
+ }
+
+ if((fd = open(tmpname, O_RDWR)) < 0) {
+ DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
+ tmpname, strerror(errno) ));
+ unlink( tmpname );
+ close(pfd[0]);
+ close(pfd[1]);
+ return;
+ }
- if((fd = open(tmpname, O_RDWR)) < 0) {
- DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
- tmpname, strerror(errno) ));
unlink( tmpname );
- close(pfd[0]);
- close(pfd[1]);
- return;
- }
- unlink( tmpname );
+ if(fcntl(fd, F_OPLKREG, pfd[1]) == -1) {
+ DEBUG(0,("check_kernel_oplocks: Kernel oplocks are not available on this machine. \
+Disabling kernel oplock supprt.\n" ));
+ close(pfd[0]);
+ close(pfd[1]);
+ close(fd);
+ return;
+ }
- if(fcntl(fd, F_OPLKREG, pfd[1]) == -1) {
- DEBUG(0,("check_kernel_oplocks: Kernel oplocks are not available on this machine. \
+ if(fcntl(fd, F_OPLKACK, OP_REVOKE) < 0 ) {
+ DEBUG(0,("check_kernel_oplocks: Error when removing kernel oplock. Error was %s. \
Disabling kernel oplock supprt.\n" ));
- close(pfd[0]);
- close(pfd[1]);
- close(fd);
- return;
- }
+ close(pfd[0]);
+ close(pfd[1]);
+ close(fd);
+ return;
+ }
- fcntl(fd, F_OPLKACK, OP_REVOKE);
- close(pfd[0]);
- close(pfd[1]);
- close(fd);
+ oplock_pipe_read = pfd[0];
+ oplock_pipe_write = pfd[1];
+ close(fd);
- DEBUG(3,("check_kernel_oplocks: Kernel oplocks enabled.\n"));
+ DEBUG(3,("check_kernel_oplocks: Kernel oplocks enabled.\n"));
- *have_oplocks = True;
+ lp_set_kernel_oplocks(True);
+ }
#endif /* HAVE_KERNEL_OPLOCKS */
}