/*
- 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
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
#include "includes.h"
-extern int DEBUGLEVEL;
-
/* Oplock ipc UDP socket. */
static int oplock_sock = -1;
uint16 global_oplock_port = 0;
-#if defined(HAVE_KERNEL_OPLOCKS)
-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;
+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 int smb_read_error;
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval);
+static struct kernel_oplocks *koplocks;
+
+static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, unsigned long file_id, BOOL local);
/****************************************************************************
- open the oplock IPC socket communication
+ Get the number of current exclusive oplocks.
****************************************************************************/
-BOOL open_oplock_ipc(void)
+
+int32 get_number_of_exclusive_open_oplocks(void)
{
- struct sockaddr_in sock_name;
- int 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));
- if (oplock_sock == -1)
- {
- DEBUG(0,("open_oplock_ipc: Failed to get local UDP socket for \
-address %x. Error was %s\n", 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,("open_oplock ipc: pid = %d, global_oplock_port = %u\n",
- (int)getpid(), global_oplock_port));
-
- return True;
+ return exclusive_oplocks_open;
}
/****************************************************************************
- Read an oplock break message from the either the oplock UDP fd
- or the kernel oplock pipe fd (if kernel oplocks are supported).
+ Return True if an oplock message is pending.
+****************************************************************************/
+
+BOOL oplock_message_waiting(fd_set *fds)
+{
+ if (koplocks && koplocks->msg_waiting(fds))
+ return True;
+
+ if (FD_ISSET(oplock_sock, 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
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 = %.0f\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;
- }
-
- /* 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;
+ 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,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);
+ }
+ }
+
+ /* 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;
}
/****************************************************************************
disabled (just sets flags). Returns True if oplock set.
****************************************************************************/
-BOOL set_file_oplock(files_struct *fsp)
+BOOL set_file_oplock(files_struct *fsp, int oplock_type)
{
-#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 = %.0f. 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, fd = %d, dev = %x, \
-inode = %.0f. Another process had the file open.\n",
- fsp->fsp_name, fsp->fd_ptr->fd, (unsigned int)fsp->fd_ptr->dev, (double)fsp->fd_ptr->inode ));
- }
- return False;
- }
-
- DEBUG(10,("set_file_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f\n",
- fsp->fsp_name, (unsigned int)fsp->fd_ptr->dev, (double)fsp->fd_ptr->inode));
-
- }
-#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;
+ 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)
+ level_II_oplocks_open++;
+ 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 ));
+
+ return True;
}
/****************************************************************************
- Attempt to release an oplock on a file. Always succeeds if kernel oplocks are
- disabled (just clears flags).
+ Attempt to release an oplock on a file. Decrements oplock count.
****************************************************************************/
-static void release_file_oplock(files_struct *fsp)
+void release_file_oplock(files_struct *fsp)
{
-#if defined(HAVE_KERNEL_OPLOCKS)
-
- if(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 );
- }
-
- /*
- * Remote 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--;
+ if (koplocks)
+ koplocks->release_oplock(fsp);
+
+ if (fsp->oplock_type == LEVEL_II_OPLOCK)
+ level_II_oplocks_open--;
+ else
+ exclusive_oplocks_open--;
+
+ fsp->oplock_type = NO_OPLOCK;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+
+ flush_write_cache(fsp, OPLOCK_RELEASE_FLUSH);
+}
+
+/****************************************************************************
+ Attempt to downgrade an oplock on a file. Doesn't decrement oplock count.
+****************************************************************************/
+
+static void downgrade_file_oplock(files_struct *fsp)
+{
+ if (koplocks)
+ koplocks->release_oplock(fsp);
+ fsp->oplock_type = LEVEL_II_OPLOCK;
+ exclusive_oplocks_open--;
+ level_II_oplocks_open++;
+ fsp->sent_oplock_break = NO_BREAK_SENT;
+}
+
+/****************************************************************************
+ Remove a file oplock. Copes with level II and exclusive.
+ Locks then unlocks the share mode lock. Client can decide to go directly
+ to none even if a "break-to-level II" was sent.
+****************************************************************************/
+
+BOOL remove_oplock(files_struct *fsp, BOOL break_to_none)
+{
+ SMB_DEV_T dev = fsp->dev;
+ SMB_INO_T inode = fsp->inode;
+ BOOL ret = True;
+
+ /* 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;
+ }
+
+ 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);
+ }
+
+ unlock_share_entry_fsp(fsp);
+ return ret;
}
/****************************************************************************
int setup_oplock_select_set( fd_set *fds)
{
- int maxfd = oplock_sock;
- FD_SET(oplock_sock,fds);
+ int maxfd = oplock_sock;
+
+ if(oplock_sock == -1)
+ return 0;
-#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 */
+ FD_SET(oplock_sock,fds);
- return maxfd;
+ if (koplocks && koplocks->notification_fd != -1) {
+ FD_SET(koplocks->notification_fd, fds);
+ maxfd = MAX(maxfd, koplocks->notification_fd);
+ }
+
+ return maxfd;
}
/****************************************************************************
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,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.
- */
-
- 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)
- {
- DEBUG(0,("process_local_message: incorrect length for OPLOCK_BREAK_CMD (was %d, \
-should be %d).\n", msg_len, 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, OPLOCK_BREAK_INODE_OFFSET);
- SMB_INO_T inode_high = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET + 4);
- inode = inode_low | (inode_high << 32);
-#else /* LARGE_SMB_INO_T */
- inode = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET);
-#endif /* LARGE_SMB_INO_T */
-
- 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);
-
- ptval = &tval;
-
- 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.
- */
- case 0x8001:
- DEBUG(0,("process_local_message: Received unsolicited break \
+ 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", msg_len, 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, OPLOCK_BREAK_INODE_OFFSET);
- SMB_INO_T inode_high = IVAL(msg_start, OPLOCK_BREAK_INODE_OFFSET + 4);
- inode = inode_low | (inode_high << 32);
-#else /* LARGE_SMB_INO_T */
- 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));
-
- }
- 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(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 \
+ 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"));
- }
-
- /*
- * 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;
+ }
+
+ /*
+ * 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, file_id = %lu\n",
+ (int)remotepid, from_port, (unsigned int)dev, (double)inode, file_id));
+ }
+
+ return True;
}
/****************************************************************************
- Process an oplock break directly.
+ Set up an oplock break message.
****************************************************************************/
-static BOOL oplock_break(SMB_DEV_T dev, SMB_INO_T inode, struct timeval *tval)
+static void prepare_break_message(char *outbuf, files_struct *fsp, BOOL level2)
{
- extern struct current_user current_user;
- extern int Client;
- char *inbuf = NULL;
- char *outbuf = NULL;
- files_struct *fsp = NULL;
- time_t start_time;
- BOOL shutdown_server = False;
- connection_struct *saved_conn;
- int saved_vuid;
- 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
- 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( 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;
- }
-
- /* 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->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;
- }
-
- /* 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;
- }
-
- /* 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 + SAFETY_MARGIN))==NULL)
- {
- DEBUG(0,("oplock_break: malloc fail for input buffer.\n"));
- return False;
- }
-
- if((outbuf = (char *)malloc(BUFFER_SIZE + SAFETY_MARGIN))==NULL)
- {
- DEBUG(0,("oplock_break: malloc fail for output buffer.\n"));
- free(inbuf);
- inbuf = NULL;
- return False;
- }
-
- /* Prepare the SMBlockingX message. */
- bzero(outbuf,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);
- /* Change this when we have level II oplocks. */
- SCVAL(outbuf,smb_vwv3+1,OPLOCKLEVEL_NONE);
-
- send_smb(Client, outbuf);
+ 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);
+}
- /* Remember we just sent an oplock break on this file. */
- fsp->sent_oplock_break = True;
+/****************************************************************************
+ Function to do the waiting before sending a local break.
+****************************************************************************/
- /* 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_conn = fsp->conn;
- saved_vuid = current_user.vuid;
- GetWd(saved_dir);
- unbecome_user();
- /* Save the chain fnum. */
- file_chain_save();
-
- while(OPEN_FSP(fsp) && fsp->granted_oplock)
- {
- if(receive_smb(Client,inbuf,OPLOCK_BREAK_TIMEOUT * 1000) == False)
- {
- /*
- * Die if we got an error.
- */
-
- if (smb_read_error == READ_EOF)
- DEBUG( 0, ( "oplock_break: end of file from client\n" ) );
+static void wait_before_sending_break(BOOL local_request)
+{
+ 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;
+
+ 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);
+ }
+ }
+}
+
+/****************************************************************************
+ 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)
+{
+ 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( "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_dif(dev, inode, 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( "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, file_id = %lu) has no oplock.\n",
+ (unsigned int)dev, (double)inode, fsp->file_id );
+ dbgtext( "Allowing break to succeed regardless.\n" );
+ }
+ return NULL;
+ }
+
+ return fsp;
+}
+
+/****************************************************************************
+ Process a level II oplock break directly.
+****************************************************************************/
+
+BOOL oplock_break_level2(files_struct *fsp, BOOL local_request, int token)
+{
+ 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.");
+ }
+
+ /*
+ * 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, file_id = %lu\n", (unsigned int)dev, (double)inode, fsp->file_id );
+ dbgtext( "Current level II oplocks_open = %d\n", level_II_oplocks_open );
+ }
+
+ return True;
+}
+
+/****************************************************************************
+ Process an oplock break directly.
+****************************************************************************/
+
+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;
+
+ /*
+ * 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, file_id = %lu)\n", (unsigned int)dev, (double)inode, fsp->file_id );
+ }
+
+ /*
+ * 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.");
+
+ /* We need this in case a readraw crosses on the wire. */
+ global_oplock_break = True;
- if (smb_read_error == READ_ERROR)
- DEBUG( 0, ("oplock_break: receive_smb error (%s)\n", strerror(errno)) );
-
- if (smb_read_error == READ_TIMEOUT)
- DEBUG( 0, ( "oplock_break: receive_smb timed out after %d seconds.\n",
- OPLOCK_BREAK_TIMEOUT ) );
-
- DEBUGADD( 0, ( "oplock_break failed for file %s ", fsp->fsp_name ) );
- DEBUGADD( 0, ( "(dev = %x, inode = %.0f).\n", (unsigned int)dev, (double)inode));
-
- shutdown_server = True;
- 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 );
- }
- shutdown_server = True;
- break;
- }
- }
-
- /*
- * Go back to being the user who requested the oplock
- * break.
- */
- if(!become_user(saved_conn, saved_vuid))
- {
- DEBUG( 0, ( "oplock_break: unable to re-become user!" ) );
- DEBUGADD( 0, ( "Shutting down server\n" ) );
- close_sockets();
- close(oplock_sock);
- exit_server("unable to re-become user");
- }
- /* Including the directory. */
- ChDir(saved_dir);
-
- /* Restore the chain fnum. */
- file_chain_restore();
-
- /* Free the buffers we've been using to recurse. */
- free(inbuf);
- free(outbuf);
-
- /* We need this in case a readraw crossed on the wire. */
- if(global_oplock_break)
- global_oplock_break = False;
-
- /*
- * If the client did not respond we must die.
- */
-
- if(shutdown_server)
- {
- DEBUG( 0, ( "oplock_break: client failure in break - " ) );
- DEBUGADD( 0, ( "shutting down this smbd.\n" ) );
- close_sockets();
- close(oplock_sock);
- exit_server("oplock break failure");
- }
-
- if(OPEN_FSP(fsp))
- {
- /* The lockingX reply will have removed the oplock flag
- from the sharemode. */
- release_file_oplock(fsp);
- }
-
- /* Santity check - remove this later. JRA */
- if(global_oplocks_open < 0)
- {
- DEBUG(0,("oplock_break: global_oplocks_open < 0 (%d). PANIC ERROR\n",
- global_oplocks_open));
- 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;
+ /* 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;
+ change_to_root_user();
+ vfs_GetWd(saved_fsp_conn,saved_dir);
+ /* 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, 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;
+ }
+
+ /*
+ * 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, file_id = %lu).\n",
+ (unsigned int)dev, (double)inode, file_id );
+ }
+ 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) && !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");
+ }
+
+ /* 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, 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 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, file_id = %lu\n", (unsigned int)dev, (double)inode, file_id );
+ dbgtext( "Current exclusive_oplocks_open = %d\n", exclusive_oplocks_open );
+ }
+
+ return True;
}
/****************************************************************************
by the local smbd then call the oplock break function directly.
****************************************************************************/
-BOOL request_oplock_break(share_mode_entry *share_entry,
- SMB_DEV_T dev, SMB_INO_T inode)
+BOOL request_oplock_break(share_mode_entry *share_entry)
{
- char op_break_msg[OPLOCK_BREAK_MSG_LEN];
- struct sockaddr_in addr_out;
- int pid = getpid();
- time_t start_time;
- int time_left;
-
- 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", pid, share_entry->op_port, global_oplock_port));
- return False;
- }
-
- DEBUG(5,("request_oplock_break: breaking our own oplock\n"));
-
- /* Call oplock break direct. */
- return oplock_break(dev, inode, &share_entry->time);
- }
-
- /* We need to send a OPLOCK_BREAK_CMD message to the
- port in the share mode entry. */
-
- 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);
- SIVAL(op_break_msg,OPLOCK_BREAK_DEV_OFFSET,dev);
- /*
- * WARNING - beware of SMB_INO_T <> 4 bytes.
- */
-#ifdef LARGE_SMB_INO_T
- SIVAL(op_break_msg,OPLOCK_BREAK_INODE_OFFSET,(inode & 0xFFFFFFFFL));
- SIVAL(op_break_msg,OPLOCK_BREAK_INODE_OFFSET+4,((inode >> 32) & 0xFFFFFFFFL));
-#else /* LARGE_SMB_INO_T */
- SIVAL(op_break_msg,OPLOCK_BREAK_INODE_OFFSET,inode);
-#endif /* LARGE_SMB_INO_T */
-
- /* set the address and port */
- bzero((char *)&addr_out,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;
+ 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;
+ }
+
+ 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... */
+
+ /* Call oplock break direct. */
+ return oplock_break(dev, inode, file_id, 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));
+ 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));
+
+ /* 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 ", 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;
- }
-
- /*
- * 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];
- 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(&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
- * 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 ", 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,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];
-
-
-#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 (%d) received.", reply_msg_len ) );
- DEBUGADD( 0, ( " Ignoring.\n" ) );
- continue;
- }
-
- /*
- * 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;
+ 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 );
+ }
+
+ 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, file_id = %lu\n",
+ (unsigned int)dev, (double)inode, file_id );
+ 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, 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);
+ }
+
+ DEBUG(3,("request_oplock_break: broke oplock.\n"));
+
+ return True;
}
/****************************************************************************
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)
{
+ DEBUG(5,("attempt_close_oplocked_file: checking file %s.\n", fsp->fsp_name));
- DEBUG(5,("attempt_close_oplocked_file: checking file %s.\n", fsp->fsp_name));
+ 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 (fsp->open && fsp->granted_oplock && !fsp->sent_oplock_break) {
+ return False;
+}
- /* Try and break the oplock. */
- file_fd_struct *fd_ptr = fsp->fd_ptr;
- if(oplock_break( fd_ptr->dev, fd_ptr->inode, &fsp->open_time)) {
- if(!fsp->open) /* Did the oplock break close the file ? */
- return True;
- }
- }
+/****************************************************************************
+ 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.
+****************************************************************************/
- return False;
+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;
+
+ /*
+ * If this file is level II oplocked then we need
+ * to grab the shared memory lock and inform all
+ * other files with a level II lock that they need
+ * to flush their read caches. We keep the lock over
+ * the shared memory area whilst doing this.
+ */
+
+ if (!LEVEL_II_OPLOCK_TYPE(fsp->oplock_type))
+ return;
+
+ 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 ));
+ }
+
+ 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 ));
+
+ for(i = 0; i < num_share_modes; i++) {
+ share_mode_entry *share_entry = &share_list[i];
+
+ /*
+ * 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.
+ */
+
+ 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)
+ 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);
+ 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_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"));
+
+ oplock_break_level2(new_fsp, True, token);
+
+ } else {
+
+ /*
+ * This is a remote file and so we send an asynchronous
+ * message.
+ */
+
+ DEBUG(10,("release_level_2_oplocks_on_change: breaking remote oplock.\n"));
+ request_oplock_break(share_entry);
+ }
+ }
+
+ SAFE_FREE(share_list);
+ unlock_share_entry_fsp(fsp);
+
+ /* 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");
+ }
}
/****************************************************************************
- Init function to check if kernel level oplocks are available.
+setup oplocks for this process
****************************************************************************/
-void check_kernel_oplocks(void)
+BOOL init_oplocks(void)
{
- static BOOL done;
-
- /*
- * We only do this check once on startup.
- */
-
- if(done)
- return;
-
- done = True;
- lp_set_kernel_oplocks(False);
-
-#if defined(HAVE_KERNEL_OPLOCKS)
- {
- int fd;
- int pfd[2];
- pstring tmpname;
-
- set_process_capability(KERNEL_OPLOCK_CAPABILITY,True);
- set_inherited_process_capability(KERNEL_OPLOCK_CAPABILITY,True);
-
- slprintf( tmpname, sizeof(tmpname)-1, "/tmp/ot.%d.XXXXXX", (unsigned int)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|O_CREAT|O_TRUNC, 0600)) < 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 support.\n" ));
- close(pfd[0]);
- close(pfd[1]);
- close(fd);
- return;
- }
-
- if(fcntl(fd, F_OPLKACK, OP_REVOKE) < 0 ) {
- DEBUG(0,("check_kernel_oplocks: Error when removing kernel oplock. Error was %s. \
-Disabling kernel oplock support.\n", strerror(errno) ));
- close(pfd[0]);
- close(pfd[1]);
- close(fd);
- return;
- }
-
- oplock_pipe_read = pfd[0];
- oplock_pipe_write = pfd[1];
- close(fd);
-
- DEBUG(3,("check_kernel_oplocks: Kernel oplocks enabled.\n"));
-
- lp_set_kernel_oplocks(True);
- }
-#endif /* HAVE_KERNEL_OPLOCKS */
+ 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);
+
+ if (lp_kernel_oplocks()) {
+#if HAVE_KERNEL_OPLOCKS_IRIX
+ koplocks = irix_init_kernel_oplocks();
+#elif HAVE_KERNEL_OPLOCKS_LINUX
+ koplocks = linux_init_kernel_oplocks();
+#endif
+ }
+
+ DEBUG(3,("open_oplock ipc: pid = %d, global_oplock_port = %u\n",
+ (int)sys_getpid(), global_oplock_port));
+
+ return True;
}
git.samba.org / ira / wip.git / blobdiff