diff options
Diffstat (limited to 'source3/smbd/oplock.c')
| -rw-r--r-- | source3/smbd/oplock.c | 618 |
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 */ } |