/*
- Unix SMB/Netbios implementation.
- Version 2.x
+ Unix SMB/CIFS implementation.
IRIX kernel oplock processing
Copyright (C) Andrew Tridgell 1992-1998
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+#define DBGC_CLASS DBGC_LOCKING
#include "includes.h"
+#include "smbd/globals.h"
#if HAVE_KERNEL_OPLOCKS_IRIX
-static int oplock_pipe_write = -1;
-static int oplock_pipe_read = -1;
+struct irix_oplocks_context {
+ struct kernel_oplocks *ctx;
+ int write_fd;
+ int read_fd;
+ struct fd_event *read_fde;
+ bool pending;
+};
/****************************************************************************
Test to see if IRIX kernel oplocks work.
****************************************************************************/
-static BOOL irix_oplocks_available(void)
+static bool irix_oplocks_available(void)
{
int fd;
int pfd[2];
- pstring tmpname;
+ TALLOC_CTX *ctx = talloc_stackframe();
+ char *tmpname = NULL;
- oplock_set_capability(True, False);
+ set_effective_capability(KERNEL_OPLOCK_CAPABILITY);
- slprintf(tmpname,sizeof(tmpname)-1, "%s/koplock.%d", lp_lockdir(), (int)sys_getpid());
+ tmpname = talloc_asprintf(ctx,
+ "%s/koplock.%d",
+ lp_lockdir(),
+ (int)sys_getpid());
+ if (!tmpname) {
+ TALLOC_FREE(ctx);
+ return False;
+ }
if(pipe(pfd) != 0) {
- DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error was %s\n",
+ DEBUG(0,("check_kernel_oplocks: Unable to create pipe. Error "
+ "was %s\n",
strerror(errno) ));
+ TALLOC_FREE(ctx);
return False;
}
if((fd = sys_open(tmpname, O_RDWR|O_CREAT|O_EXCL|O_TRUNC, 0600)) < 0) {
- DEBUG(0,("check_kernel_oplocks: Unable to open temp test file %s. Error was %s\n",
+ 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]);
+ TALLOC_FREE(ctx);
return False;
}
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" ));
+ TALLOC_FREE(ctx);
+
+ if(sys_fcntl_long(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 False;
}
- 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) ));
+ if(sys_fcntl_long(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 True;
}
+/*
+ * This is bad because the file_id should always be created through the vfs
+ * layer! Unfortunately, a conn struct isn't available here.
+ */
+static struct file_id file_id_create_dev(SMB_DEV_T dev, SMB_INO_T inode)
+{
+ struct file_id key;
+
+ /* the ZERO_STRUCT ensures padding doesn't break using the key as a
+ * blob */
+ ZERO_STRUCT(key);
+
+ key.devid = dev;
+ key.inode = inode;
+
+ return key;
+}
+
/****************************************************************************
* Deal with the IRIX kernel <--> smbd
* oplock break protocol.
****************************************************************************/
-static BOOL irix_oplock_receive_message(fd_set *fds, char *buffer, int buffer_len)
+static files_struct *irix_oplock_receive_message(struct kernel_oplocks *_ctx)
{
- extern int smb_read_error;
+ struct irix_oplocks_context *ctx = talloc_get_type(_ctx->private_data,
+ struct irix_oplocks_context);
oplock_stat_t os;
char dummy;
+ struct file_id fileid;
files_struct *fsp;
+ /*
+ * TODO: is it correct to assume we only get one
+ * oplock break, for each byte we read from the pipe?
+ */
+ ctx->pending = false;
+
/*
* 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;
+ if(read(ctx->read_fd, &dummy, 1) != 1) {
+ DEBUG(0,("irix_oplock_receive_message: read of kernel "
+ "notification failed. Error was %s.\n",
+ strerror(errno) ));
+ return NULL;
}
/*
* 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) ));
+ if(sys_fcntl_ptr(ctx->read_fd, F_OPLKSTAT, &os) < 0) {
+ DEBUG(0,("irix_oplock_receive_message: fcntl of kernel "
+ "notification failed. Error was %s.\n",
+ strerror(errno) ));
if(errno == EAGAIN) {
/*
* Duplicate kernel break message - ignore.
*/
- memset(buffer, '\0', KERNEL_OPLOCK_BREAK_MSG_LEN);
- return True;
+ return NULL;
}
- smb_read_error = READ_ERROR;
- return False;
+ return NULL;
}
/*
* We only have device and inode info here - we have to guess that this
* is the first fsp open with this dev,ino pair.
+ *
+ * NOTE: this doesn't work if any VFS modules overloads
+ * the file_id_create() hook!
*/
- if ((fsp = file_find_di_first((SMB_DEV_T)os.os_dev, (SMB_INO_T)os.os_ino)) == NULL) {
- DEBUG(0,("receive_local_message: unable to find open file with dev = %x, inode = %.0f\n",
- (unsigned int)os.os_dev, (double)os.os_ino ));
- return False;
+ fileid = file_id_create_dev((SMB_DEV_T)os.os_dev,
+ (SMB_INO_T)os.os_ino);
+ if ((fsp = file_find_di_first(fileid)) == NULL) {
+ DEBUG(0,("irix_oplock_receive_message: unable to find open "
+ "file with dev = %x, inode = %.0f\n",
+ (unsigned int)os.os_dev, (double)os.os_ino ));
+ return NULL;
}
- DEBUG(5,("receive_local_message: kernel oplock break request received for \
-dev = %x, inode = %.0f\n, file_id = %ul", (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id ));
-
- /*
- * 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);
-
- memcpy(buffer + KERNEL_OPLOCK_BREAK_DEV_OFFSET, (char *)&fsp->dev, sizeof(fsp->dev));
- memcpy(buffer + KERNEL_OPLOCK_BREAK_INODE_OFFSET, (char *)&fsp->inode, sizeof(fsp->inode));
- memcpy(buffer + KERNEL_OPLOCK_BREAK_FILEID_OFFSET, (char *)&fsp->file_id, sizeof(fsp->file_id));
-
- return True;
+ DEBUG(5,("irix_oplock_receive_message: kernel oplock break request "
+ "received for file_id %s gen_id = %ul",
+ file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id ));
+
+ return fsp;
}
/****************************************************************************
Attempt to set an kernel oplock on a file.
****************************************************************************/
-static BOOL irix_set_kernel_oplock(files_struct *fsp, int oplock_type)
+static bool irix_set_kernel_oplock(struct kernel_oplocks *_ctx,
+ files_struct *fsp, int oplock_type)
{
- if (fcntl(fsp->fd, F_OPLKREG, oplock_pipe_write) == -1) {
+ struct irix_oplocks_context *ctx = talloc_get_type(_ctx->private_data,
+ struct irix_oplocks_context);
+
+ if (sys_fcntl_long(fsp->fh->fd, F_OPLKREG, ctx->write_fd) == -1) {
if(errno != EAGAIN) {
- DEBUG(0,("set_file_oplock: Unable to get kernel oplock on file %s, dev = %x, \
-inode = %.0f, file_id = %ul. Error was %s\n",
- fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id,
+ DEBUG(0,("irix_set_kernel_oplock: Unable to get "
+ "kernel oplock on file %s, file_id %s "
+ "gen_id = %ul. Error was %s\n",
+ fsp->fsp_name, file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id,
strerror(errno) ));
} else {
- DEBUG(5,("set_file_oplock: Refused oplock on file %s, fd = %d, dev = %x, \
-inode = %.0f, file_id = %ul. Another process had the file open.\n",
- fsp->fsp_name, fsp->fd, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id ));
+ DEBUG(5,("irix_set_kernel_oplock: Refused oplock on "
+ "file %s, fd = %d, file_id = %s, "
+ "gen_id = %ul. Another process had the file "
+ "open.\n",
+ fsp->fsp_name, fsp->fh->fd,
+ file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id ));
}
return False;
}
- DEBUG(10,("set_file_oplock: got kernel oplock on file %s, dev = %x, inode = %.0f, file_id = %ul\n",
- fsp->fsp_name, (unsigned int)fsp->dev, (double)fsp->inode, fsp->file_id));
+ DEBUG(10,("irix_set_kernel_oplock: got kernel oplock on file %s, file_id = %s "
+ "gen_id = %ul\n",
+ fsp->fsp_name, file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id));
return True;
}
Release a kernel oplock on a file.
****************************************************************************/
-static void irix_release_kernel_oplock(files_struct *fsp)
+static void irix_release_kernel_oplock(struct kernel_oplocks *_ctx,
+ files_struct *fsp, int oplock_type)
{
if (DEBUGLVL(10)) {
/*
* Check and print out the current kernel
* oplock state of this file.
*/
- int state = fcntl(fsp->fd, F_OPLKACK, -1);
- dbgtext("release_kernel_oplock: file %s, dev = %x, inode = %.0f file_id = %ul, has kernel \
-oplock state of %x.\n", fsp->fsp_name, (unsigned int)fsp->dev,
- (double)fsp->inode, fsp->file_id, state );
+ int state = sys_fcntl_long(fsp->fh->fd, F_OPLKACK, -1);
+ dbgtext("irix_release_kernel_oplock: file %s, file_id = %s"
+ "gen_id = %ul, has kernel oplock state "
+ "of %x.\n", fsp->fsp_name, file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id, state );
}
/*
* Remove the kernel oplock on this file.
*/
- if(fcntl(fsp->fd, F_OPLKACK, OP_REVOKE) < 0) {
+ if(sys_fcntl_long(fsp->fh->fd, F_OPLKACK, OP_REVOKE) < 0) {
if( DEBUGLVL( 0 )) {
- dbgtext("release_kernel_oplock: Error when removing kernel oplock on file " );
- dbgtext("%s, dev = %x, inode = %.0f, file_id = %ul. Error was %s\n",
- fsp->fsp_name, (unsigned int)fsp->dev,
- (double)fsp->inode, fsp->file_id, strerror(errno) );
+ dbgtext("irix_release_kernel_oplock: Error when "
+ "removing kernel oplock on file " );
+ dbgtext("%s, file_id = %s gen_id = %ul. "
+ "Error was %s\n",
+ fsp->fsp_name, file_id_string_tos(&fsp->file_id),
+ fsp->fh->gen_id,
+ strerror(errno) );
}
}
}
-/****************************************************************************
- Parse a kernel oplock message.
-****************************************************************************/
-
-static BOOL irix_kernel_oplock_parse(char *msg_start, int msg_len,
- SMB_INO_T *inode, SMB_DEV_T *dev, unsigned long *file_id)
-{
- /* Ensure that the msg length is correct. */
- if(msg_len != KERNEL_OPLOCK_BREAK_MSG_LEN) {
- DEBUG(0,("incorrect length for KERNEL_OPLOCK_BREAK_CMD (was %d, should be %d).\n",
- msg_len, KERNEL_OPLOCK_BREAK_MSG_LEN));
- return False;
- }
-
- memcpy((char *)inode, msg_start+KERNEL_OPLOCK_BREAK_INODE_OFFSET, sizeof(*inode));
- memcpy((char *)dev, msg_start+KERNEL_OPLOCK_BREAK_DEV_OFFSET, sizeof(*dev));
- memcpy((char *)file_id, msg_start+KERNEL_OPLOCK_BREAK_FILEID_OFFSET, sizeof(*file_id));
-
- DEBUG(5,("kernel oplock break request for file dev = %x, inode = %.0f, file_id = %ul\n",
- (unsigned int)*dev, (double)*inode, *file_id));
-
- return True;
-}
-
-/****************************************************************************
- Set *maxfd to include oplock read pipe.
-****************************************************************************/
-
-static BOOL irix_oplock_msg_waiting(fd_set *fds)
+static void irix_oplocks_read_fde_handler(struct event_context *ev,
+ struct fd_event *fde,
+ uint16_t flags,
+ void *private_data)
{
- if (oplock_pipe_read == -1)
- return False;
+ struct irix_oplocks_context *ctx = talloc_get_type(private_data,
+ struct irix_oplocks_context);
+ files_struct *fsp;
- return FD_ISSET(oplock_pipe_read,fds);
+ fsp = irix_oplock_receive_message(ctx->ctx);
+ break_kernel_oplock(smbd_messaging_context(), fsp);
}
/****************************************************************************
Setup kernel oplocks.
****************************************************************************/
-struct kernel_oplocks *irix_init_kernel_oplocks(void)
+static const struct kernel_oplocks_ops irix_koplocks = {
+ .set_oplock = irix_set_kernel_oplock,
+ .release_oplock = irix_release_kernel_oplock,
+ .contend_level2_oplocks_begin = NULL,
+ .contend_level2_oplocks_end = NULL,
+};
+
+struct kernel_oplocks *irix_init_kernel_oplocks(TALLOC_CTX *mem_ctx)
{
+ struct kernel_oplocks *_ctx;
+ struct irix_oplocks_context *ctx;
int pfd[2];
- static struct kernel_oplocks koplocks;
if (!irix_oplocks_available())
return NULL;
+ _ctx = talloc_zero(mem_ctx, struct kernel_oplocks);
+ if (!_ctx) {
+ return NULL;
+ }
+
+ ctx = talloc_zero(_ctx, struct irix_oplocks_context);
+ if (!ctx) {
+ talloc_free(_ctx);
+ return NULL;
+ }
+ _ctx->ops = &irix_koplocks;
+ _ctx->private_data = ctx;
+ ctx->ctx = _ctx;
+
if(pipe(pfd) != 0) {
- DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. Error was %s\n",
- strerror(errno) ));
+ talloc_free(_ctx);
+ DEBUG(0,("setup_kernel_oplock_pipe: Unable to create pipe. "
+ "Error was %s\n", strerror(errno) ));
return False;
}
- oplock_pipe_read = pfd[0];
- oplock_pipe_write = pfd[1];
-
- koplocks.receive_message = irix_oplock_receive_message;
- koplocks.set_oplock = irix_set_kernel_oplock;
- koplocks.release_oplock = irix_release_kernel_oplock;
- koplocks.parse_message = irix_kernel_oplock_parse;
- koplocks.msg_waiting = irix_oplock_msg_waiting;
- koplocks.notification_fd = oplock_pipe_read;
+ ctx->read_fd = pfd[0];
+ ctx->write_fd = pfd[1];
- return &koplocks;
+ ctx->read_fde = event_add_fd(smbd_event_context(),
+ ctx,
+ ctx->read_fd,
+ EVENT_FD_READ,
+ irix_oplocks_read_fde_handler,
+ ctx);
+ return _ctx;
}
#else
+ void oplock_irix_dummy(void);
void oplock_irix_dummy(void) {}
#endif /* HAVE_KERNEL_OPLOCKS_IRIX */
git.samba.org / kai / samba.git / blobdiff