/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
Blocking Locking functions
- Copyright (C) Jeremy Allison 1998
+ Copyright (C) Jeremy Allison 1998-2003
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
*****************************************************************************/
typedef struct {
- ubi_slNode msg_next;
- int com_type;
- files_struct *fsp;
- time_t expire_time;
- int lock_num;
- char *inbuf;
- int length;
+ ubi_slNode msg_next;
+ int com_type;
+ files_struct *fsp;
+ time_t expire_time;
+ int lock_num;
+ SMB_BIG_UINT offset;
+ SMB_BIG_UINT count;
+ uint16 lock_pid;
+ char *inbuf;
+ int length;
} blocking_lock_record;
static ubi_slList blocking_lock_queue = { NULL, (ubi_slNodePtr)&blocking_lock_queue, 0};
static void free_blocking_lock_record(blocking_lock_record *blr)
{
- SAFE_FREE(blr->inbuf);
- SAFE_FREE(blr);
+ SAFE_FREE(blr->inbuf);
+ SAFE_FREE(blr);
}
/****************************************************************************
static files_struct *get_fsp_from_pkt(char *inbuf)
{
- switch(CVAL(inbuf,smb_com)) {
- case SMBlock:
- case SMBlockread:
- return file_fsp(inbuf,smb_vwv0);
- case SMBlockingX:
- return file_fsp(inbuf,smb_vwv2);
- default:
- DEBUG(0,("get_fsp_from_pkt: PANIC - unknown type on blocking lock queue - exiting.!\n"));
- exit_server("PANIC - unknown type on blocking lock queue");
- }
- return NULL; /* Keep compiler happy. */
+ switch(CVAL(inbuf,smb_com)) {
+ case SMBlock:
+ case SMBlockread:
+ return file_fsp(inbuf,smb_vwv0);
+ case SMBlockingX:
+ return file_fsp(inbuf,smb_vwv2);
+ default:
+ DEBUG(0,("get_fsp_from_pkt: PANIC - unknown type on blocking lock queue - exiting.!\n"));
+ exit_server("PANIC - unknown type on blocking lock queue");
+ }
+ return NULL; /* Keep compiler happy. */
}
/****************************************************************************
static BOOL in_chained_smb(void)
{
- return (chain_size != 0);
+ return (chain_size != 0);
}
+static void received_unlock_msg(int msg_type, pid_t src, void *buf, size_t len);
+
/****************************************************************************
Function to push a blocking lock request onto the lock queue.
****************************************************************************/
-BOOL push_blocking_lock_request( char *inbuf, int length, int lock_timeout, int lock_num)
+BOOL push_blocking_lock_request( char *inbuf, int length, int lock_timeout,
+ int lock_num, uint16 lock_pid, SMB_BIG_UINT offset, SMB_BIG_UINT count)
{
- blocking_lock_record *blr;
+ static BOOL set_lock_msg;
+ blocking_lock_record *blr;
+ BOOL my_lock_ctx = False;
+ NTSTATUS status;
- if(in_chained_smb() ) {
- DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
- return False;
- }
+ if(in_chained_smb() ) {
+ DEBUG(0,("push_blocking_lock_request: cannot queue a chained request (currently).\n"));
+ return False;
+ }
- /*
- * Now queue an entry on the blocking lock queue. We setup
- * the expiration time here.
- */
+ /*
+ * Now queue an entry on the blocking lock queue. We setup
+ * the expiration time here.
+ */
- if((blr = (blocking_lock_record *)malloc(sizeof(blocking_lock_record))) == NULL) {
- DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
- return False;
- }
+ if((blr = (blocking_lock_record *)malloc(sizeof(blocking_lock_record))) == NULL) {
+ DEBUG(0,("push_blocking_lock_request: Malloc fail !\n" ));
+ return False;
+ }
- if((blr->inbuf = (char *)malloc(length)) == NULL) {
- DEBUG(0,("push_blocking_lock_request: Malloc fail (2)!\n" ));
- SAFE_FREE(blr);
- return False;
- }
+ if((blr->inbuf = (char *)malloc(length)) == NULL) {
+ DEBUG(0,("push_blocking_lock_request: Malloc fail (2)!\n" ));
+ SAFE_FREE(blr);
+ return False;
+ }
- blr->com_type = CVAL(inbuf,smb_com);
- blr->fsp = get_fsp_from_pkt(inbuf);
- blr->expire_time = (lock_timeout == -1) ? (time_t)-1 : time(NULL) + (time_t)lock_timeout;
- blr->lock_num = lock_num;
- memcpy(blr->inbuf, inbuf, length);
- blr->length = length;
+ blr->com_type = CVAL(inbuf,smb_com);
+ blr->fsp = get_fsp_from_pkt(inbuf);
+ blr->expire_time = (lock_timeout == -1) ? (time_t)-1 : time(NULL) + (time_t)lock_timeout;
+ blr->lock_num = lock_num;
+ blr->lock_pid = lock_pid;
+ blr->offset = offset;
+ blr->count = count;
+ memcpy(blr->inbuf, inbuf, length);
+ blr->length = length;
+
+ /* Add a pending lock record for this. */
+ status = brl_lock(blr->fsp->dev, blr->fsp->inode, blr->fsp->fnum,
+ lock_pid, sys_getpid(), blr->fsp->conn->cnum,
+ offset, count, PENDING_LOCK, &my_lock_ctx);
+
+ if (!NT_STATUS_IS_OK(status)) {
+ DEBUG(0,("push_blocking_lock_request: failed to add PENDING_LOCK record.\n"));
+ free_blocking_lock_record(blr);
+ return False;
+ }
- ubi_slAddTail(&blocking_lock_queue, blr);
+ ubi_slAddTail(&blocking_lock_queue, blr);
+ /* Ensure we'll receive messages when this is unlocked. */
+ if (!set_lock_msg) {
+ message_register(MSG_SMB_UNLOCK, received_unlock_msg);
+ set_lock_msg = True;
+ }
- DEBUG(3,("push_blocking_lock_request: lock request length=%d blocked with expiry time %d (+%d) \
+ DEBUG(3,("push_blocking_lock_request: lock request length=%d blocked with expiry time %d (+%d) \
for fnum = %d, name = %s\n", length, (int)blr->expire_time, lock_timeout,
- blr->fsp->fnum, blr->fsp->fsp_name ));
+ blr->fsp->fnum, blr->fsp->fsp_name ));
- return True;
+ /* Push the MID of this packet on the signing queue. */
+ srv_defer_sign_response(SVAL(inbuf,smb_mid));
+
+ return True;
}
/****************************************************************************
static void reply_lockingX_success(blocking_lock_record *blr)
{
- char *outbuf = OutBuffer;
- int bufsize = BUFFER_SIZE;
- char *inbuf = blr->inbuf;
- int outsize = 0;
+ char *outbuf = OutBuffer;
+ int bufsize = BUFFER_SIZE;
+ char *inbuf = blr->inbuf;
+ int outsize = 0;
- construct_reply_common(inbuf, outbuf);
- set_message(outbuf,2,0,True);
+ construct_reply_common(inbuf, outbuf);
+ set_message(outbuf,2,0,True);
- /*
- * As this message is a lockingX call we must handle
- * any following chained message correctly.
- * This is normally handled in construct_reply(),
- * but as that calls switch_message, we can't use
- * that here and must set up the chain info manually.
- */
+ /*
+ * As this message is a lockingX call we must handle
+ * any following chained message correctly.
+ * This is normally handled in construct_reply(),
+ * but as that calls switch_message, we can't use
+ * that here and must set up the chain info manually.
+ */
- outsize = chain_reply(inbuf,outbuf,blr->length,bufsize);
+ outsize = chain_reply(inbuf,outbuf,blr->length,bufsize);
- outsize += chain_size;
+ outsize += chain_size;
- send_blocking_reply(outbuf,outsize);
+ send_blocking_reply(outbuf,outsize);
}
/****************************************************************************
char *inbuf = blr->inbuf;
construct_reply_common(inbuf, outbuf);
+ /* whenever a timeout is given w2k maps LOCK_NOT_GRANTED to
+ FILE_LOCK_CONFLICT! (tridge) */
+ if (NT_STATUS_EQUAL(status, NT_STATUS_LOCK_NOT_GRANTED)) {
+ status = NT_STATUS_FILE_LOCK_CONFLICT;
+ }
+
ERROR_NT(status);
if (!send_smb(smbd_server_fd(),outbuf))
exit_server("generic_blocking_lock_error: send_smb failed.");
ssize_t nread = -1;
char *data, *p;
int outsize = 0;
- SMB_OFF_T startpos;
+ SMB_BIG_UINT startpos;
size_t numtoread;
NTSTATUS status;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
files_struct *fsp = blr->fsp;
+ BOOL my_lock_ctx = False;
numtoread = SVAL(inbuf,smb_vwv1);
- startpos = IVAL(inbuf,smb_vwv2);
+ startpos = (SMB_BIG_UINT)IVAL(inbuf,smb_vwv2);
numtoread = MIN(BUFFER_SIZE-outsize,numtoread);
data = smb_buf(outbuf) + 3;
- status = do_lock( fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)numtoread,
- (SMB_BIG_UINT)startpos, READ_LOCK);
+ status = do_lock_spin( fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)numtoread, startpos, READ_LOCK, &my_lock_ctx);
if (NT_STATUS_V(status)) {
- if ((errno != EACCES) && (errno != EAGAIN)) {
+ if (!NT_STATUS_EQUAL(status,NT_STATUS_LOCK_NOT_GRANTED) &&
+ !NT_STATUS_EQUAL(status,NT_STATUS_FILE_LOCK_CONFLICT)) {
/*
- * We have other than a "can't get lock" POSIX
+ * We have other than a "can't get lock"
* error. Send an error.
* Return True so we get dequeued.
*/
char *outbuf = OutBuffer;
char *inbuf = blr->inbuf;
int outsize;
- SMB_OFF_T count = 0, offset = 0;
+ SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT)0;
NTSTATUS status;
connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
files_struct *fsp = blr->fsp;
+ BOOL my_lock_ctx = False;
- count = IVAL(inbuf,smb_vwv1);
- offset = IVAL(inbuf,smb_vwv3);
+ count = IVAL_TO_SMB_OFF_T(inbuf,smb_vwv1);
+ offset = IVAL_TO_SMB_OFF_T(inbuf,smb_vwv3);
errno = 0;
- status = do_lock(fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)count,
- (SMB_BIG_UINT)offset, WRITE_LOCK);
+ status = do_lock_spin(fsp, conn, SVAL(inbuf,smb_pid), count, offset, WRITE_LOCK, &my_lock_ctx);
if (NT_STATUS_IS_ERR(status)) {
- if((errno != EACCES) && (errno != EAGAIN)) {
+ if (!NT_STATUS_EQUAL(status,NT_STATUS_LOCK_NOT_GRANTED) &&
+ !NT_STATUS_EQUAL(status,NT_STATUS_FILE_LOCK_CONFLICT)) {
/*
- * We have other than a "can't get lock" POSIX
+ * We have other than a "can't get lock"
* error. Send an error.
* Return True so we get dequeued.
*/
uint16 lock_pid;
BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
char *data;
+ BOOL my_lock_ctx = False;
NTSTATUS status = NT_STATUS_OK;
data = smb_buf(inbuf) + ((large_file_format ? 20 : 10)*num_ulocks);
* request would never have been queued. JRA.
*/
errno = 0;
- status = do_lock(fsp,conn,lock_pid,count,offset,
- ((locktype & 1) ? READ_LOCK : WRITE_LOCK));
+ status = do_lock_spin(fsp,conn,lock_pid,count,offset,
+ ((locktype & 1) ? READ_LOCK : WRITE_LOCK), &my_lock_ctx);
if (NT_STATUS_IS_ERR(status)) break;
}
reply_lockingX_success(blr);
return True;
- } else if ((errno != EACCES) && (errno != EAGAIN)) {
- /*
- * We have other than a "can't get lock" POSIX
- * error. Free any locks we had and return an error.
- * Return True so we get dequeued.
- */
+ } else if (!NT_STATUS_EQUAL(status,NT_STATUS_LOCK_NOT_GRANTED) &&
+ !NT_STATUS_EQUAL(status,NT_STATUS_FILE_LOCK_CONFLICT)) {
+ /*
+ * We have other than a "can't get lock"
+ * error. Free any locks we had and return an error.
+ * Return True so we get dequeued.
+ */
blocking_lock_reply_error(blr, status);
return True;
static BOOL blocking_lock_record_process(blocking_lock_record *blr)
{
- switch(blr->com_type) {
- case SMBlock:
- return process_lock(blr);
- case SMBlockread:
- return process_lockread(blr);
- case SMBlockingX:
- return process_lockingX(blr);
- default:
- DEBUG(0,("blocking_lock_record_process: PANIC - unknown type on blocking lock queue - exiting.!\n"));
- exit_server("PANIC - unknown type on blocking lock queue");
- }
- return False; /* Keep compiler happy. */
+ switch(blr->com_type) {
+ case SMBlock:
+ return process_lock(blr);
+ case SMBlockread:
+ return process_lockread(blr);
+ case SMBlockingX:
+ return process_lockingX(blr);
+ default:
+ DEBUG(0,("blocking_lock_record_process: PANIC - unknown type on blocking lock queue - exiting.!\n"));
+ exit_server("PANIC - unknown type on blocking lock queue");
+ }
+ return False; /* Keep compiler happy. */
}
/****************************************************************************
void remove_pending_lock_requests_by_fid(files_struct *fsp)
{
- blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
- blocking_lock_record *prev = NULL;
+ blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
+ blocking_lock_record *prev = NULL;
- while(blr != NULL) {
- if(blr->fsp->fnum == fsp->fnum) {
+ while(blr != NULL) {
+ if(blr->fsp->fnum == fsp->fnum) {
- DEBUG(10,("remove_pending_lock_requests_by_fid - removing request type %d for \
+ DEBUG(10,("remove_pending_lock_requests_by_fid - removing request type %d for \
file %s fnum = %d\n", blr->com_type, fsp->fsp_name, fsp->fnum ));
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- continue;
- }
+ brl_unlock(blr->fsp->dev, blr->fsp->inode, blr->fsp->fnum,
+ blr->lock_pid, sys_getpid(), blr->fsp->conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
- prev = blr;
- blr = (blocking_lock_record *)ubi_slNext(blr);
- }
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ continue;
+ }
+
+ prev = blr;
+ blr = (blocking_lock_record *)ubi_slNext(blr);
+ }
}
/****************************************************************************
void remove_pending_lock_requests_by_mid(int mid)
{
- blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
- blocking_lock_record *prev = NULL;
+ blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
+ blocking_lock_record *prev = NULL;
- while(blr != NULL) {
- if(SVAL(blr->inbuf,smb_mid) == mid) {
- files_struct *fsp = blr->fsp;
+ while(blr != NULL) {
+ if(SVAL(blr->inbuf,smb_mid) == mid) {
+ files_struct *fsp = blr->fsp;
- DEBUG(10,("remove_pending_lock_requests_by_mid - removing request type %d for \
+ DEBUG(10,("remove_pending_lock_requests_by_mid - removing request type %d for \
file %s fnum = %d\n", blr->com_type, fsp->fsp_name, fsp->fnum ));
- blocking_lock_reply_error(blr,NT_STATUS_CANCELLED);
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- continue;
- }
+ blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
+ brl_unlock(blr->fsp->dev, blr->fsp->inode, blr->fsp->fnum,
+ blr->lock_pid, sys_getpid(), blr->fsp->conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ continue;
+ }
- prev = blr;
- blr = (blocking_lock_record *)ubi_slNext(blr);
- }
+ prev = blr;
+ blr = (blocking_lock_record *)ubi_slNext(blr);
+ }
}
/****************************************************************************
- Return True if the blocking lock queue has entries.
+ Set a flag as an unlock request affects one of our pending locks.
*****************************************************************************/
-BOOL blocking_locks_pending(void)
+static void received_unlock_msg(int msg_type, pid_t src, void *buf, size_t len)
{
- blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
- return (blr == NULL ? False : True);
+ DEBUG(10,("received_unlock_msg\n"));
+ process_blocking_lock_queue(time(NULL));
+}
+
+/****************************************************************************
+ Return the number of seconds to the next blocking locks timeout, or default_timeout
+*****************************************************************************/
+
+unsigned blocking_locks_timeout(unsigned default_timeout)
+{
+ unsigned timeout = default_timeout;
+ time_t t;
+ blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst(&blocking_lock_queue);
+
+ /* note that we avoid the time() syscall if there are no blocking locks */
+ if (!blr)
+ return timeout;
+
+ t = time(NULL);
+
+ while (blr) {
+ if ((blr->expire_time != (time_t)-1) &&
+ (timeout > (blr->expire_time - t))) {
+ timeout = blr->expire_time - t;
+ }
+ blr = (blocking_lock_record *)ubi_slNext(blr);
+ }
+
+ if (timeout < 1)
+ timeout = 1;
+
+ return timeout;
}
/****************************************************************************
void process_blocking_lock_queue(time_t t)
{
- blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
- blocking_lock_record *prev = NULL;
-
- if(blr == NULL)
- return;
-
- /*
- * Go through the queue and see if we can get any of the locks.
- */
-
- while(blr != NULL) {
- connection_struct *conn = NULL;
- uint16 vuid;
- files_struct *fsp = NULL;
-
- /*
- * Ensure we don't have any old chain_fsp values
- * sitting around....
- */
- chain_size = 0;
- file_chain_reset();
- fsp = blr->fsp;
-
- conn = conn_find(SVAL(blr->inbuf,smb_tid));
- vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID :
- SVAL(blr->inbuf,smb_uid);
-
- DEBUG(5,("process_blocking_lock_queue: examining pending lock fnum = %d for file %s\n",
- fsp->fnum, fsp->fsp_name ));
-
- if((blr->expire_time != -1) && (blr->expire_time > t)) {
- /*
- * Lock expired - throw away all previously
- * obtained locks and return lock error.
- */
- DEBUG(5,("process_blocking_lock_queue: pending lock fnum = %d for file %s timed out.\n",
- fsp->fnum, fsp->fsp_name ));
-
- blocking_lock_reply_error(blr,NT_STATUS_ACCESS_DENIED);
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- continue;
- }
-
- if(!change_to_user(conn,vuid)) {
- DEBUG(0,("process_blocking_lock_queue: Unable to become user vuid=%d.\n",
- vuid ));
- /*
- * Remove the entry and return an error to the client.
- */
- blocking_lock_reply_error(blr,NT_STATUS_ACCESS_DENIED);
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- continue;
- }
-
- if(!set_current_service(conn,True)) {
- DEBUG(0,("process_blocking_lock_queue: Unable to become service Error was %s.\n", strerror(errno) ));
- /*
- * Remove the entry and return an error to the client.
- */
- blocking_lock_reply_error(blr,NT_STATUS_ACCESS_DENIED);
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- change_to_root_user();
- continue;
- }
-
- /*
- * Go through the remaining locks and try and obtain them.
- * The call returns True if all locks were obtained successfully
- * and False if we still need to wait.
- */
-
- if(blocking_lock_record_process(blr)) {
- free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
- blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
- change_to_root_user();
- continue;
- }
-
- change_to_root_user();
-
- /*
- * Move to the next in the list.
- */
- prev = blr;
- blr = (blocking_lock_record *)ubi_slNext(blr);
- }
+ blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
+ blocking_lock_record *prev = NULL;
+
+ if(blr == NULL)
+ return;
+
+ /*
+ * Go through the queue and see if we can get any of the locks.
+ */
+
+ while(blr != NULL) {
+ connection_struct *conn = NULL;
+ uint16 vuid;
+ files_struct *fsp = NULL;
+
+ /*
+ * Ensure we don't have any old chain_fsp values
+ * sitting around....
+ */
+ chain_size = 0;
+ file_chain_reset();
+ fsp = blr->fsp;
+
+ conn = conn_find(SVAL(blr->inbuf,smb_tid));
+ vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID :
+ SVAL(blr->inbuf,smb_uid);
+
+ DEBUG(5,("process_blocking_lock_queue: examining pending lock fnum = %d for file %s\n",
+ fsp->fnum, fsp->fsp_name ));
+
+ if((blr->expire_time != -1) && (blr->expire_time <= t)) {
+ /*
+ * Lock expired - throw away all previously
+ * obtained locks and return lock error.
+ */
+ DEBUG(5,("process_blocking_lock_queue: pending lock fnum = %d for file %s timed out.\n",
+ fsp->fnum, fsp->fsp_name ));
+
+ brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
+ blr->lock_pid, sys_getpid(), conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
+
+ blocking_lock_reply_error(blr,NT_STATUS_FILE_LOCK_CONFLICT);
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ continue;
+ }
+
+ if(!change_to_user(conn,vuid)) {
+ DEBUG(0,("process_blocking_lock_queue: Unable to become user vuid=%d.\n",
+ vuid ));
+ /*
+ * Remove the entry and return an error to the client.
+ */
+ blocking_lock_reply_error(blr,NT_STATUS_ACCESS_DENIED);
+
+ brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
+ blr->lock_pid, sys_getpid(), conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
+
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ continue;
+ }
+
+ if(!set_current_service(conn,SVAL(blr->inbuf,smb_flg),True)) {
+ DEBUG(0,("process_blocking_lock_queue: Unable to become service Error was %s.\n", strerror(errno) ));
+ /*
+ * Remove the entry and return an error to the client.
+ */
+ blocking_lock_reply_error(blr,NT_STATUS_ACCESS_DENIED);
+
+ brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
+ blr->lock_pid, sys_getpid(), conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
+
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ change_to_root_user();
+ continue;
+ }
+
+ /*
+ * Go through the remaining locks and try and obtain them.
+ * The call returns True if all locks were obtained successfully
+ * and False if we still need to wait.
+ */
+
+ if(blocking_lock_record_process(blr)) {
+
+ brl_unlock(fsp->dev, fsp->inode, fsp->fnum,
+ blr->lock_pid, sys_getpid(), conn->cnum,
+ blr->offset, blr->count, True, NULL, NULL);
+
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&blocking_lock_queue));
+ change_to_root_user();
+ continue;
+ }
+
+ change_to_root_user();
+
+ /*
+ * Move to the next in the list.
+ */
+ prev = blr;
+ blr = (blocking_lock_record *)ubi_slNext(blr);
+ }
}
git.samba.org / ira / wip.git / blobdiff