wdbTsfsDrv.c
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上传日期:2008-05-12
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文件大小:38k
源码类别:
VxWorks
开发平台:
C/C++
- /* wdbTsfsDrv.c - virtual generic file I/O driver for the WDB agent */
- /* Copyright 1996-2001 Wind River Systems, Inc. */
- /*
- modification history
- --------------------
- 01s,09oct01,jhw Fixed memory leak in tsfsOpen(). SPR 67981.
- 01r,03mar99,dgp update to reference project facility, make tsfsOpen() NOMANUAL
- 01q,28jan99,jmp added initialization of semGiveAddr in WDB_TSFS_GENERIC_INFO
- structure, for TSFS_BOOT facility (SPR# 24466).
- 01p,23nov98,cth added explicit setting of WDB_TSFS_O_TEXT open mode (SPR 23467)
- 01o,31aug98,dgp final editing for WV 2.0 FCS, corrections to tgtsvr stuff
- 01n,28aug98,dgp FCS man page edit, add tgtsvr info
- 01m,25aug98,cth added errno mapping for ECONNREFUSED
- 01l,10aug98,cth FIORENAME now handles prepended device names, updated docs
- 01k,27may98,cth modified docs, removed get snd/rcv buf ioctls
- 01j,05may98,dgp clean up man pages for WV 2.0 beta release
- 01i,16apr98,cth removed debug print statements
- 01h,16apr98,cth mapped errnos from tsfs portable definitions to vxworks'
- added errno reset in open, updated docs
- 01g,03apr98,cjtc i960 port for WV20
- 01f,19mar98,cth added ioctl support for sockets
- 01e,25feb98,cth added O_APPEND, _EXCL modes, doc changes, added FIORENAME
- 01d,30jan98,cth added directory creation/deletion, added man page
- 01c,18aug97,cth added FIOSNDURGB ioctl command
- 01b,18nov96,dbt replaced the field delete in WDB_TSFS_INFO struct for C++
- compatibility, with field remove.
- 01a,28aug96,c_s written, based on wdbVioDrv.c by ms.
- */
- /*
- DESCRIPTION
- This library provides a virtual file I/O driver for use with the WDB
- agent. I/O is performed on this virtual I/O device exactly as it would be
- on any device referencing a VxWorks file system. File operations, such as
- read() and write(), move data over a virtual I/O channel created between the
- WDB agent and the Tornado target server. The operations are then executed
- on the host file system. Because file operations are actually performed on
- the host file system by the target server, the file system presented by this
- virtual I/O device is known as the target-server file system, or TSFS.
- The driver is installed with wdbTsfsDrv(), creating a device typically
- called '/tgtsvr'. See the manual page for wdbTsfsDrv() for more information
- about using this function. The initialization is done automatically,
- enabling access to TSFS, when INCLUDE_WDB_TSFS is defined.
- The target server also must have TSFS enabled in order to use TSFS. See the
- .I WindView User's Guide: Data Upload
- and the target server documentation.
- TSFS SOCKETS
- TSFS provides all of the functionality of other VxWorks file systems.
- For details, see the
- .pG "I/O System and Local File Systems."
- In addition to normal
- files, however, TSFS also provides basic access to TCP sockets. This
- includes opening the client side of a TCP socket, reading, writing, and
- closing the socket. Basic setsockopt() commands are also supported.
- To open a TCP socket using TSFS, use a filename of the form:
- .tS
- TCP:<server_name> | <server_ip>:<port_number>
- .tE
- To open and connect a TCP socket to a server socket located on a server
- named 'mongoose', listening on port 2010, use the following:
- .CS
- fd = open ("/tgtsvr/TCP:mongoose:2010", 0, 0)
- .CE
- The open flags and permission arguments to the open call are ignored when
- opening a socket through TSFS. If the server 'mongoose' has an IP
- number of '144.12.44.12', you can use the following equivalent form of the
- command:
- .CS
- fd = open ("/tgtsvr/TCP:144.12.44.12:2010", 0, 0)
- .CE
- DIRECTORIES
- All directory functions, such as mkdir(), rmdir(), opendir(), readdir(),
- closedir(), and rewinddir() are supported by TSFS, regardless of
- whether the target server providing TSFS is being run on a UNIX or
- Windows host.
- While it is possible to open and close directories using open() and close(),
- it is not possible to read from a directory using read(). Instead, readdir()
- must be used. It is also not possible to write to an open directory, and
- opening a directory for anything other than read-only results in an
- error, with 'errno' set to 'EISDIR'. Calling read() on a directory
- returns 'ERROR' with 'errno' set to 'EISDIR'.
- OPEN FLAGS
- When the target server that is providing the TSFS is running on a Windows
- host, the default file-translation mode is binary translation. If text
- translation is required, then WDB_TSFS_O_TEXT can be included in the mode
- argument to open(). For example:
- .CS
- fd = open ("/tgtsvr/foo", O_CREAT | O_RDWR | WDB_TSFS_O_TEXT, 0777)
- .CE
- If the target server providing TSFS services is running on a UNIX host,
- WDB_TSFS_O_TEXT is ignored.
- TGTSVR
- For general information on the target server, see the reference
- entry for 'tgtsvr'. In order to use this library, the target server must
- support and be configured with the following options:
- .iP "-R <root>" 20
- Specify the root of the host's file system that is visible to target processes
- using TSFS. This flag is required to use TSFS. Files under this root are by
- default read only. To allow read/write access, specify -RW.
- .iP "-RW"
- Allow read and write access to host files by target processes using
- TSFS. When this option is specified, access to the
- target server is restricted as if `-L' were also specified.
- IOCTL SUPPORT
- TSFS supports the following ioctl() functions for controlling files
- and sockets. Details about each function can be found in the documentation
- listed below.
- .iP 'FIOSEEK'
- .iP 'FIOWHERE'
- .iP 'FIOMKDIR'
- Create a directory. The path, in this case '/tgtsvr/tmp', must be an
- absolute path prefixed with the device name. To create the directory '/tmp'
- on the root of the TSFS file system use the following:
- .CS
- status = ioctl (fd, FIOMKDIR, "/tgtsvr/tmp")
- .CE
- .iP 'FIORMDIR'
- Remove a directory. The path, in this case '/tgtsvr/foo', must be an
- absolute path prefixed with the device name. To remove the directory '/foo'
- from the root of the TSFS file system, use the following:
- .CS
- status = ioctl (fd, FIORMDIR, "/tgtsvr/foo")
- .CE
- .iP 'FIORENAME'
- Rename the file or directory represented by 'fd' to the name in the string
- pointed to by 'arg'. The path indicated by 'arg' may be prefixed with the
- device name or not. Using this ioctl() function with the path '/foo/goo'
- produces the same outcome as the path '/tgtsvr/foo/goo'. The path is not
- modified to account for the current working directory, and therefore must
- be an absolute path.
- .CS
- char *arg = "/tgtsvr/foo/goo";
- status = ioctl (fd, FIORENAME, arg);
- .CE
- .iP 'FIOREADDIR'
- .iP 'FIONREAD'
- Return the number of bytes ready to read on a TSFS socket file
- descriptor.
- .iP 'FIOFSTATGET'
- .iP 'FIOGETFL'
- .LP
- The following ioctl() functions can be used only on socket file
- descriptors. Using these functions with ioctl() provides similar behavior
- to the setsockopt() and getsockopt() functions usually used with socket
- descriptors. Each command's name is derived from a
- getsockopt()/setsockopt() command and works in exactly the same way as the
- respective getsockopt()/setsockopt() command. The functions setsockopt()
- and getsockopt() can not be used with TSFS socket file descriptors.
- For example, to enable recording of debugging information on the TSFS socket
- file descriptor, call:
- .CS
- int arg = 1;
- status = ioctl (fd, SO_SETDEBUG, arg);
- .CE
- To determine whether recording of debugging information for the TSFS-socket
- file descritptor is enabled or disabled, call:
- .CS
- int arg;
- status = ioctl (fd, SO_GETDEBUG, & arg);
- .CE
- After the call to ioctl(), 'arg' contains the state of the debugging attribute.
- The ioctl() functions supported for TSFS sockets are:
- .iP SO_SETDEBUG
- Equivalent to setsockopt() with the SO_DEBUG command.
- .iP SO_GETDEBUG
- Equivalent to getsockopt() with the SO_DEBUG command.
- .iP SO_SETSNDBUF
- This command changes the size of the send buffer of the host socket. The
- configuration of the WDB channel between the host and target also affects the
- number of bytes that can be written to the TSFS file descriptor in a single
- attempt.
- .iP SO_SETRCVBUF
- This command changes the size of the receive buffer of the host socket. The
- configuration of the WDB channel between the host and target also affects the
- number of bytes that can be read from the TSFS file descriptor in a single
- attempt.
- .iP SO_SETDONTROUTE
- Equivalent to setsockopt() with the SO_DONTROUTE command.
- .iP SO_GETDONTROUTE
- Equivalent to getsockopt() with the SO_DONTROUTE command.
- .iP SO_SETOOBINLINE
- Equivalent to setsockopt() with the SO_OOBINLINE command.
- .iP SO_GETOOBINLINE
- Equivalent to getsockopt() with the SO_OOBINLINE command.
- .iP SO_SNDURGB
- The SO_SNDURGB command sends one out-of-band byte (pointed to by 'arg')
- through the socket.
- ERROR CODES
- The routines in this library return the VxWorks error codes that
- most closely match the errnos generated by the corresponding host function.
- If an error is encountered that is due to a WDB failure, a WDB error
- is returned instead of the standard VxWorks 'errno'. If an 'errno' generated
- on the host has no reasonable VxWorks counterpart, the host 'errno' is
- passed to the target calling routine unchanged.
- SEE ALSO:
- .I "Tornado User's Guide,"
- .I "VxWorks Programmer's Guide: I/O System, Local File Systems"
- INTERNAL
- opendir(), closedir(), readdir() and rewinddir() are supported when
- the tgtsvr is running on a Unix host. All of these, with the exception of
- rewinddir() are supported on Win32. Win32 provides directory listings with
- an iterator model (findfirst(), findnext(), findclose()). There is no
- way to back up this iterator, like rewinddir does.
- There are times when the host must return an error code that is not
- defined on the target. These error codes are defined in wdb.h. Each
- time the errno is set in this function, it is first mapped from the
- portable error codes defined in wdb.h to a vxWorks' error code. Common,
- usually Posix, errnos are passed through this mapping unchanged. If
- an errno generated on the host is not understood by the mapping routines,
- then it is passed through unchanged. This may give the user useful
- information about what has happened when vxWorks doesn't have an
- equivalent errno. Many of the errnos mapped are the Win32 socket and
- networking errnos, which have vxWorks counterparts, but are very different
- from unix and vxWorks definitions.
- The ioctl command FIORENAME does not work ideally. It should modify the path
- it is handed to account for the current working directory. Doing this however
- requires that this wdb-virtual-io driver call into ioLib, something that has
- been avoided so far. This creates a problem with rename() that is not seen
- in dosFsLib. The rename function, in ioLib, does not patch up the path name
- with the current working directory, letting the ioctl in dosFsLib do it
- instead. When the current working directory is '/tgtsvr/foo/goo', and it
- contains the file 'file1', and the tsfsRoot is '/folk/blimpy', calling
- 'rename ("file1", "file-renamed") results in /folk/blimpy/foo/goo/file1
- being renamed to /folk/blimpy/file-renamed. Notice the /foo/goo working
- directory was ignored. By the way, passFsLib has the same problem.
- */
- #include "vxWorks.h"
- #include "ioLib.h"
- #include "iosLib.h"
- #include "tyLib.h"
- #include "stdlib.h"
- #include "stdio.h"
- #include "intLib.h"
- #include "string.h"
- #include "sys/stat.h"
- #include "dirent.h"
- #include "wdb/wdb.h"
- #include "wdb/wdbLibP.h"
- #include "wdb/wdbEvtLib.h"
- #include "wdb/wdbVioLib.h"
- #include "wdb/wdbLibP.h"
- #if (defined (CPU_FAMILY) && (CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 1 /* tell gcc960 not to optimize alignments */
- #endif /* CPU_FAMILY==I960 */
- typedef struct
- {
- DEV_HDR devHdr; /* device header */
- } TSFS_DEV;
- typedef struct
- {
- int channel; /* tsfs channel number */
- int openmode; /* used for FIOGETFL */
- SEMAPHORE tsfsSem; /* mutex sem for access */
- SEMAPHORE waitSem; /* used to wait for tgtsvr */
- WDB_EVT_NODE evtNode; /* agent event node */
- WDB_TSFS_INFO info; /* event contents */
- struct
- {
- TGT_INT_T value; /* value to return to caller */
- TGT_INT_T errNo; /* errno to return to caller */
- TGT_INT_T extra1; /* for ioctl extra results */
- TGT_INT_T extra2; /* for ioctl extra results */
- } result;
- } TSFS_CHANNEL_DESC;
- #if (defined (CPU_FAMILY) && (CPU_FAMILY==I960) && (defined __GNUC__))
- #pragma align 0 /* turn off alignment requirement */
- #endif /* CPU_FAMILY==I960 */
- static int tsfsDrvNum; /* drvnum for this driver */
- static int tsfsChanNum; /* next channel number */
- static TSFS_DEV tsfsDev; /* virtual I/O device */
- /* globals */
- int mutexOptionsTsfsDrv = SEM_Q_PRIORITY | SEM_DELETE_SAFE;
- int binaryOptionsTsfsDrv = SEM_Q_FIFO;
- int wdbTsfsDefaultDirPerm = DEFAULT_DIR_PERM; /* created directory perms */
- /* forward declarations */
- static int tsfsCreate (TSFS_DEV *pDev, char *name, int mode);
- static int tsfsOpen (TSFS_DEV *pDev, char * name, int mode,
- int perm);
- static int tsfsDelete (TSFS_DEV *pDev, char * name);
- static STATUS tsfsClose (TSFS_CHANNEL_DESC *pChannelDesc);
- static int tsfsRead (TSFS_CHANNEL_DESC *pNetFd, char *buf,
- int maxBytes);
- static int tsfsWrite (TSFS_CHANNEL_DESC *pNetFd, char *buf,
- int maxBytes);
- static STATUS tsfsIoctl (TSFS_CHANNEL_DESC *pChannelDesc,
- int request, int arg);
- static int tsfsErrnoMap (int hostErrno);
- static void tsfsEventGet (void * pChannelDesc,
- WDB_EVT_DATA *pEvtData);
- static void tsfsEventDeq (void * pChannelDesc);
- /*******************************************************************************
- *
- * wdbTsfsDrv - initialize the TSFS device driver for a WDB agent
- *
- * This routine initializes the VxWorks virtual I/O "2" driver and creates
- * a TSFS device of the specified name.
- *
- * This routine should be called exactly once, before any reads, writes, or
- * opens. Normally, it is called by usrRoot() in usrConfig.c,
- * and the device name created is '/tgtsvr'.
- *
- * After this routine has been called, individual virtual I/O channels
- * can be opened by appending the host file name to the virtual I/O
- * device name. For example, to get a file descriptor for the host
- * file '/etc/passwd', call open() as follows:
- * .CS
- * fd = open ("/tgtsvr/etc/passwd", O_RDWR, 0)
- * .CE
- *
- * RETURNS: OK, or ERROR if the driver can not be installed.
- */
- STATUS wdbTsfsDrv
- (
- char * name /* root name in i/o system */
- )
- {
- /* check if driver already installed */
- if (tsfsDrvNum > 0)
- return (OK);
- tsfsDrvNum = iosDrvInstall (tsfsCreate, tsfsDelete, tsfsOpen,
- tsfsClose, tsfsRead, tsfsWrite,
- tsfsIoctl);
- if (tsfsDrvNum <= 0)
- return (ERROR);
- /* Add the device to the I/O systems device list */
- return (iosDevAdd (&tsfsDev.devHdr, name, tsfsDrvNum));
- }
- /*******************************************************************************
- *
- * tsfsCreate - open a virtual I/O channel
- *
- * RETURNS: tsfsDev handle
- */
- static int tsfsCreate
- (
- TSFS_DEV * pDev, /* I/O system device entry */
- char * name, /* name of file to open */
- int mode /* VxWorks open mode */
- )
- {
- return tsfsOpen (pDev, name, mode | O_CREAT | O_TRUNC, 0666);
- }
- /*******************************************************************************
- *
- * tsfsOpen - open a virtual I/O channel
- *
- * This routine opens a virtual I/O channel and returns a device handle
- * for the channel. It does this by creating a WDB event containing the
- * information necessary for the tgtsvr to perform the requested open
- * operation. This routine waits, after the event is sent to the tgtsvr,
- * until the tgtsvr stores the results of the request back to target memory.
- * These results are handed back to the caller.
- *
- * This routine is also used to create files and directories. After the file
- * or directory is created, it is opened and a valid device handle is handed
- * back to the caller.
- *
- * Note, when creating a directory, the mode argument (O_RDWR, O_RDONLY...)
- * is not necessary, except to indicate O_CREAT. It is illegal in most file
- * systems, including all of VxWorks' file systems, to open a directory in
- * any mode other than O_RDONLY. Because the directory is created, as well
- * as opened in this routine, it is unreasonable to expect that the mode be
- * O_RDONLY in order to succeed. After all, the user wants to create the
- * directory, not open it. This is confused by our implementation of mkdir,
- * where open is used to do the creation. To resolve the problem here, the
- * mode is coerced to O_RDONLY when a directory is being created. Opening a
- * directory (not creating it too) will rightfully fail if the mode is
- * anything other than O_RDONLY.
- *
- * NOMANUAL
- *
- * RETURNS: tsfsDev handle
- */
- static int tsfsOpen
- (
- TSFS_DEV * pDev, /* I/O system device entry */
- char * name, /* name of file to open */
- int mode, /* VxWorks open mode */
- int perm /* permission bits */
- )
- {
- TSFS_CHANNEL_DESC * pChannel; /* channel handle */
- int pmode = 0; /* portable open mode */
- int pperm; /* portable open permission-word */
- /* create a channel descriptor */
- pChannel = (TSFS_CHANNEL_DESC *) malloc (sizeof (TSFS_CHANNEL_DESC));
- if (pChannel == NULL)
- {
- errno = tsfsErrnoMap (ENOMEM);
- return ERROR;
- }
- /* initialize the channel descriptor */
- pChannel->channel = tsfsChanNum++;
- semMInit (&pChannel->tsfsSem, mutexOptionsTsfsDrv);
- semBInit (&pChannel->waitSem, binaryOptionsTsfsDrv, SEM_EMPTY);
- /* initialize our event node */
- wdbEventNodeInit (&pChannel->evtNode, tsfsEventGet, tsfsEventDeq,
- pChannel);
- /* Now format up an event. */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_OPEN;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- pChannel->info.extra.open.filename = (TGT_ADDR_T) name;
- pChannel->info.extra.open.fnameLen = strlen (name);
- pChannel->openmode = mode;
- /* Map between VxWorks modes and portable TSFS modes. */
- if (mode & O_CREAT)
- {
- pmode |= WDB_TSFS_O_CREAT;
- mode &= ~O_CREAT;
- }
- if (mode & O_TRUNC)
- {
- pmode |= WDB_TSFS_O_TRUNC;
- mode &= ~O_TRUNC;
- }
- if (mode & O_APPEND)
- {
- pmode |= WDB_TSFS_O_APPEND;
- mode &= ~O_APPEND;
- }
- if (mode & O_EXCL)
- {
- pmode |= WDB_TSFS_O_EXCL;
- mode &= ~O_EXCL;
- }
- if (mode & WDB_TSFS_O_TEXT)
- {
- pmode |= WDB_TSFS_O_TEXT;
- mode &= ~WDB_TSFS_O_TEXT;
- }
- switch (mode)
- {
- case O_RDONLY: pmode |= WDB_TSFS_O_RDONLY; break;
- case O_RDWR: pmode |= WDB_TSFS_O_RDWR; break;
- case O_WRONLY: pmode |= WDB_TSFS_O_WRONLY; break;
- }
- pChannel->info.extra.open.mode = pmode;
- /*
- * If we are creating a file, regular or directory, we let the host side
- * know what type by using the permission word. Here we map between
- * VxWorks' FSTAT_DIR/REG and the portable TSFS file types. See the
- * comments above about coercing the mode to O_RDONLY when creating
- * a directory. This coersion is done in the tgtsvr rather than here.
- */
- pperm = perm;
- if (pmode & WDB_TSFS_O_CREAT)
- {
- if (perm & FSTAT_DIR)
- {
- pperm |= WDB_TSFS_S_IFDIR;
- pperm &= ~FSTAT_DIR;
- }
- else
- {
- pperm |= WDB_TSFS_S_IFREG;
- pperm &= ~FSTAT_REG;
- }
- }
- pChannel->info.extra.open.perm = pperm;
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- if (pChannel->result.errNo == OK)
- {
- errno = 0;
- return (int) pChannel;
- }
- errno = tsfsErrnoMap (pChannel->result.errNo);
- free (pChannel);
- return ERROR;
- }
- /*******************************************************************************
- *
- * tsfsDelete - delete a file via the target server
- *
- * RETURNS: status
- * NOMANUAL
- */
- static int tsfsDelete
- (
- TSFS_DEV * pDev, /* I/O system device entry */
- char * name /* name of file to destroy */
- )
- {
- int result;
- TSFS_CHANNEL_DESC * pChannel; /* channel handle */
- /*
- * for delete, we aren't given a channel to begin with. We'll have
- * to create one just for this operation.
- */
- pChannel = (TSFS_CHANNEL_DESC *) malloc (sizeof (TSFS_CHANNEL_DESC));
- if (pChannel == NULL)
- {
- errno = tsfsErrnoMap (ENOMEM);
- return ERROR;
- }
- /*
- * For non-file requests (i.e., ones like delete, where we don't
- * have an open file handle before we attempt the request), we
- * set the channel number to -1.
- */
- pChannel->channel = -1;
- semBInit (&pChannel->waitSem, binaryOptionsTsfsDrv, SEM_EMPTY);
- /* initialize our event node */
- wdbEventNodeInit (&pChannel->evtNode, tsfsEventGet, tsfsEventDeq,
- pChannel);
- /* Now format up an event. */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_DELETE;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- pChannel->info.extra.remove.filename = (TGT_ADDR_T) name;
- pChannel->info.extra.remove.fnameLen = strlen (name);
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- result = pChannel->result.value;
- errno = tsfsErrnoMap (pChannel->result.errNo);
- /* discard the temporary channel */
- semTerminate (&pChannel->waitSem);
- free (pChannel);
- return result;
- }
- /******************************************************************************
- *
- * tsfsClose - close a TSFS file
- *
- * RETURNS: status
- * NOMANUAL
- */
- static STATUS tsfsClose
- (
- TSFS_CHANNEL_DESC * pChannel /* channel handle */
- )
- {
- int result;
- semTake (&pChannel->tsfsSem, WAIT_FOREVER);
- /* prepare the event for transmission */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_CLOSE;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- if (pChannel->result.errNo != OK)
- errno = tsfsErrnoMap (pChannel->result.errNo);
- /* XXX - reexamine this for reentrancy issues */
- result = pChannel->result.value;
- semGive (&pChannel->tsfsSem);
- semTerminate (&pChannel->tsfsSem);
- semTerminate (&pChannel->waitSem);
- free (pChannel);
- return result;
- }
- /*******************************************************************************
- *
- * tsfsRead - read from a TSFS file
- *
- * RETURNS: the number of bytes read if successful, or ERROR with errno set
- * to indicate the error.
- * NOMANUAL
- */
- static int tsfsRead
- (
- TSFS_CHANNEL_DESC * pChannel, /* channel handle */
- char * buf, /* buffer to receive data */
- int maxBytes /* max bytes to transfer */
- )
- {
- int result;
- semTake (&pChannel->tsfsSem, WAIT_FOREVER);
- /* prepare the event for transmission */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_READ;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- pChannel->info.extra.rw.buffer = (TGT_ADDR_T) buf;
- pChannel->info.extra.rw.nBytes = maxBytes;
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- if (pChannel->result.errNo != OK)
- errno = tsfsErrnoMap (pChannel->result.errNo);
- result = pChannel->result.value;
- semGive (&pChannel->tsfsSem);
- return result;
- }
- /*******************************************************************************
- * tsfsWrite - write to a TSFS file
- *
- * RETURNS: the number of bytes written if successful, or ERROR with errno
- * set to indicate the error.
- * NOMANUAL
- */
- static int tsfsWrite
- (
- TSFS_CHANNEL_DESC * pChannel, /* channel handle */
- char * buf, /* buffer of data to be sent */
- int maxBytes /* max bytes to transfer */
- )
- {
- int result;
- semTake (&pChannel->tsfsSem, WAIT_FOREVER);
- /* prepare the event for transmission */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_WRITE;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- pChannel->info.extra.rw.buffer = (TGT_ADDR_T) buf;
- pChannel->info.extra.rw.nBytes = maxBytes;
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- if (pChannel->result.errNo != OK)
- errno = tsfsErrnoMap (pChannel->result.errNo);
- result = pChannel->result.value;
- semGive (&pChannel->tsfsSem);
- return result;
- }
- /*******************************************************************************
- * tsfsIoctl - special device control
- *
- * RETURNS: status
- * NOMANUAL
- */
- static STATUS tsfsIoctl
- (
- TSFS_CHANNEL_DESC * pChannel, /* device to control */
- int request, /* request code */
- int arg /* some argument */
- )
- {
- int result;
- DIR * pDir = (DIR *) arg; /* For FIOREADDIR Only */
- int pNewChannel; /* for FIOMKDIR */
- char * pShortPath; /* for same */
- semTake (&pChannel->tsfsSem, WAIT_FOREVER);
- /* map between VxWorks ioctl codes and supported TSFS codes */
- switch (request)
- {
- case FIOSEEK:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIOSEEK;
- break;
- case FIOWHERE:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIOWHERE;
- break;
- case FIONREAD:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIONREAD;
- break;
- case FIOFSTATGET:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIOFSTATGET;
- break;
- case SO_SNDURGB:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SNDURGB;
- break;
- case SO_SETDEBUG:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SETDEBUG;
- break;
- case SO_GETDEBUG:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_GETDEBUG;
- break;
- case SO_SETSNDBUF:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SETSNDBUF;
- break;
- case SO_SETRCVBUF:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SETRCVBUF;
- break;
- case SO_SETDONTROUTE:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SETDONTROUTE;
- break;
- case SO_GETDONTROUTE:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_GETDONTROUTE;
- break;
- case SO_SETOOBINLINE:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_SETOOBINLINE;
- break;
- case SO_GETOOBINLINE:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_SO_GETOOBINLINE;
- break;
- case FIOREADDIR:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIOREADDIR;
- /*
- * For FIOREADDIR we want to provide the address of the
- * struct dirent * and the dd_cookie.
- */
- pChannel->result.extra1 = pDir->dd_cookie;
- pChannel->result.extra2 = (TGT_INT_T) &pDir->dd_dirent;
- break;
- case FIORENAME:
- pChannel->info.extra.ioctl.request = WDB_TSFS_IOCTL_FIORENAME;
- /*
- * If the new name starts with the device name, strip the
- * device name first. If it doesn't just continue.
- */
- if ((pShortPath = strstr ((char *) arg,
- tsfsDev.devHdr.name)) != NULL)
- {
- /*
- * If the device name is in the path, but not the first
- * element of the path, use the whole path. Otherwise
- * remove the device name. For example, /tgtsvr/foo/goo
- * should yield /foo/goo, but /foo/tgtsvr/goo should
- * remain /foo/tgtsvr/goo (/tgtsvr is the dev name).
- */
- if (pShortPath != (char *) arg)
- pShortPath = (char *) arg;
- else
- pShortPath = (char *) arg + strlen (tsfsDev.devHdr.name);
- }
- else
- {
- pShortPath = (char *) arg;
- }
- /*
- * We put the length of the new name in extra1, and the address
- * of the new name in extra2.
- */
- pChannel->result.extra1 = strlen (pShortPath);
- pChannel->result.extra2 = (TGT_INT_T) pShortPath;
- break;
- case FIOMKDIR:
- /*
- * We handle this by using our own tsfsOpen to do the creation.
- * The device name must prefix the path or we generate an error.
- * Start by stripping off the device name.
- */
- if ((pShortPath = strstr ((char *) arg,
- tsfsDev.devHdr.name)) == NULL)
- {
- errno = tsfsErrnoMap (WDB_ERR_INVALID_PARAMS);
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- /* The device must be the first thing in the path. */
- if (pShortPath != (char *) arg)
- {
- errno = tsfsErrnoMap (WDB_ERR_INVALID_PARAMS);
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- pShortPath = (char *) arg + strlen (tsfsDev.devHdr.name);
- /*
- * Now we have the proper path, use our own tsfsOpen to create
- * the directory. The tsfsDev arg to tsfsOpen isn't used by
- * tsfsOpen.
- */
- if ((pNewChannel =
- tsfsOpen (& tsfsDev, pShortPath, O_CREAT | O_RDONLY,
- FSTAT_DIR | wdbTsfsDefaultDirPerm)) == ERROR)
- {
- semGive (&pChannel->tsfsSem);
- return ERROR;
- }
- /* Close the new channel and return. */
- if (tsfsClose ((TSFS_CHANNEL_DESC *) pNewChannel) != OK)
- {
- semGive (&pChannel->tsfsSem);
- return ERROR;
- }
- semGive (&pChannel->tsfsSem);
- return (OK);
- case FIORMDIR:
- {
- struct stat statBuf;
- statBuf.st_mode = 0;
- /*
- * We handle this using our own tsfsDelete to remove the
- * directory. The device name must prefix the path or we
- * generate an error. Start by stripping off the device name.
- */
- if ((pShortPath = strstr ((char *) arg,
- tsfsDev.devHdr.name)) == NULL)
- {
- errno = tsfsErrnoMap (WDB_ERR_INVALID_PARAMS);
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- /* The device must be the first thing in the path. */
- if (pShortPath != (char *) arg)
- {
- errno = tsfsErrnoMap (WDB_ERR_INVALID_PARAMS);
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- pShortPath = (char *) arg + strlen (tsfsDev.devHdr.name);
- /*
- * Now we have the proper path, but we have to ensure the file
- * is a directory before we can remove it. Use our own tsfsIoctl
- * with FIOSTATGET to find out if it is. We open the path, test
- * if it points to a directory, then close it. Then we delete it.
- */
- pNewChannel = tsfsOpen (& tsfsDev, pShortPath, O_RDONLY,
- wdbTsfsDefaultDirPerm);
- tsfsIoctl ((TSFS_CHANNEL_DESC *) pNewChannel, FIOFSTATGET,
- (int) &statBuf);
- tsfsClose ((TSFS_CHANNEL_DESC *) pNewChannel);
- if (! (statBuf.st_mode & S_IFDIR))
- {
- errno = tsfsErrnoMap (ENOTDIR);
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- /*
- * We are sure the file is a directory, so we use tsfsDelete to
- * remove the directory. The tsfsDev arg to tsfsDelete isn't
- * used by tsfsDelete. Try to return the most useful errno
- * by making sure errno records only the errors in tsfsDelete.
- */
- errno = 0;
- if (tsfsDelete (& tsfsDev, pShortPath) != OK)
- {
- semGive (&pChannel->tsfsSem);
- return (ERROR);
- }
- semGive (&pChannel->tsfsSem);
- return (OK);
- }
- case FIOGETFL:
- /* this one is handled locally. */
- *((int *) arg) = pChannel->openmode;
- semGive (&pChannel->tsfsSem);
- return (OK);
- /* don't pass unknown ioctl's up to target server. */
- default:
- errno = tsfsErrnoMap (WDB_ERR_INVALID_PARAMS);
- semGive (&pChannel->tsfsSem);
- return ERROR;
- }
- /* prepare the event for transmission */
- pChannel->info.info.channel = pChannel->channel;
- pChannel->info.info.opcode = WDB_TSFS_IOCTL;
- pChannel->info.info.semId = (TGT_ADDR_T) &pChannel->waitSem;
- pChannel->info.info.pResult = (TGT_ADDR_T) &pChannel->result.value;
- pChannel->info.info.pErrno = (TGT_ADDR_T) &pChannel->result.errNo;
- pChannel->info.info.semGiveAddr = (TGT_ADDR_T) &semGive;
- pChannel->info.extra.ioctl.arg = arg;
- pChannel->info.extra.ioctl.pExtra1 = (TGT_ADDR_T) &pChannel->result.extra1;
- pChannel->info.extra.ioctl.pExtra2 = (TGT_ADDR_T) &pChannel->result.extra2;
- /* Post the event. */
- wdbEventPost (&pChannel->evtNode);
- /* Wait for the tgtsvr to get back to us with the result. */
- semTake (&pChannel->waitSem, WAIT_FOREVER);
- if (pChannel->result.errNo != OK)
- errno = tsfsErrnoMap (pChannel->result.errNo);
- /*
- * Some ioctl() requests require us to fill in data pointed to by arg.
- * If so we take care of that here.
- */
- switch (request)
- {
- case FIOFSTATGET:
- {
- struct stat * pStat = (struct stat *) arg;
- memset (pStat, 0, sizeof (struct stat));
- pStat->st_dev = (int) &tsfsDev;
- pStat->st_size = pChannel->result.extra1;
- if (pChannel->result.extra2 & WDB_TSFS_S_IFREG)
- pStat->st_mode |= S_IFREG;
- if (pChannel->result.extra2 & WDB_TSFS_S_IFDIR)
- pStat->st_mode |= S_IFDIR;
- break;
- }
- case FIONREAD:
- {
- * ((int *) arg) = pChannel->result.extra1;
- break;
- }
- case FIOREADDIR:
- {
- pDir->dd_cookie = pChannel->result.extra1;
- break;
- }
- case SO_GETDEBUG:
- case SO_GETDONTROUTE:
- case SO_GETOOBINLINE:
- {
- * ((int *) arg) = pChannel->result.extra1;
- break;
- }
- }
- result = pChannel->result.value;
- semGive (&pChannel->tsfsSem);
- return result;
- }
- /******************************************************************************
- *
- * tsfsErrnoMap - map errnos returned from host to vxWorks' errnos
- *
- * This routine maps from the portable errno values defined in wdb.h for
- * the TSFS, to errnos defined on the target. All POSIX errnos are passed
- * through this mapping without change. WDB-specific errnos that have been
- * returned from the host are also not mapped.
- *
- * INTERNAL
- * Errnos that are not defined as portable. This includes POSIX errnos, but
- * is may include more if some get through the cracks.
- *
- * RETURNS: vxWorks' errno, or zero (0) if passed zero (0)
- *
- * NOMANUAL
- */
- static int tsfsErrnoMap
- (
- int hostErrno /* non-vxWorks errno returned from host */
- )
- {
- int wverr;
- /*
- * By default pass on the error because it may be a POSIX errno. It may
- * also be zero, so it shouldn't get modified. Unknown errnos will pass
- * right through. There should be no default case in the switch below.
- */
- wverr = hostErrno;
- switch (hostErrno)
- {
- case WDB_TSFS_ERRNO_ENOTEMPTY: wverr = ENOTEMPTY; break;
- case WDB_TSFS_ERRNO_EDEADLK: wverr = EDEADLK; break;
- case WDB_TSFS_ERRNO_ENOLCK: wverr = ENOLCK; break;
- case WDB_TSFS_ERRNO_EMSGSIZE: wverr = EMSGSIZE; break;
- case WDB_TSFS_ERRNO_EOPNOTSUPP: wverr = EOPNOTSUPP; break;
- case WDB_TSFS_ERRNO_EADDRNOTAVAIL: wverr = EADDRNOTAVAIL; break;
- case WDB_TSFS_ERRNO_ENOTSOCK: wverr = ENOTSOCK; break;
- case WDB_TSFS_ERRNO_ENETRESET: wverr = ENETRESET; break;
- case WDB_TSFS_ERRNO_ECONNABORTED: wverr = ECONNABORTED; break;
- case WDB_TSFS_ERRNO_ECONNRESET: wverr = ECONNRESET; break;
- case WDB_TSFS_ERRNO_ECONNREFUSED: wverr = ECONNREFUSED; break;
- case WDB_TSFS_ERRNO_ENOBUFS: wverr = ENOBUFS; break;
- case WDB_TSFS_ERRNO_ENOTCONN: wverr = ENOTCONN; break;
- case WDB_TSFS_ERRNO_ESHUTDOWN: wverr = ESHUTDOWN; break;
- case WDB_TSFS_ERRNO_ETIMEDOUT: wverr = ETIMEDOUT; break;
- case WDB_TSFS_ERRNO_EINPROGRESS: wverr = EINPROGRESS; break;
- case WDB_TSFS_ERRNO_EWOULDBLOCK: wverr = EWOULDBLOCK; break;
- case WDB_TSFS_ERRNO_ENOSR: wverr = ENOSR; break;
- case WDB_TSFS_ERRNO_ELOOP: wverr = ELOOP; break;
- case WDB_TSFS_ERRNO_ENAMETOOLONG: wverr = ENAMETOOLONG; break;
- case WDB_TSFS_ERRNO_EBADMSG: wverr = EBADMSG; break;
- }
- return (wverr);
- }
- /******************************************************************************
- *
- * tsfsEventGet - fill in WDB event parameters at transmission time
- *
- * RETURNS: N/A
- * NOMANUAL
- */
- static void tsfsEventGet
- (
- void * arg,
- WDB_EVT_DATA * pEvtData
- )
- {
- TSFS_CHANNEL_DESC * pChannel = (TSFS_CHANNEL_DESC *) arg;
- int size;
- size = sizeof (WDB_TSFS_GENERIC_INFO);
- switch (pChannel->info.info.opcode)
- {
- case WDB_TSFS_OPEN:
- size += sizeof (WDB_TSFS_OPEN_INFO);
- break;
- case WDB_TSFS_DELETE:
- size += sizeof (WDB_TSFS_DELETE_INFO);
- break;
- case WDB_TSFS_WRITE:
- case WDB_TSFS_READ:
- size += sizeof (WDB_TSFS_RW_INFO);
- break;
- case WDB_TSFS_IOCTL:
- size += sizeof (WDB_TSFS_IOCTL_INFO);
- break;
- case WDB_TSFS_CLOSE:
- default:
- break;
- };
- memcpy (&pEvtData->eventInfo, &pChannel->info, size);
- pEvtData->evtType = WDB_EVT_TSFS_OP;
- pEvtData->eventInfo.evtInfo.numInts = size / sizeof (TGT_INT_T) - 1;
- }
- /******************************************************************************
- *
- * tsfsEventDeq - free allocated event data after transmission
- *
- * NOMANUAL
- */
- static void tsfsEventDeq
- (
- void * arg
- )
- {
- /* The tsfs event has no allocated data or other need for cleanup. */
- return;
- }