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authorJeremy Allison <jra@samba.org>1998-08-13 02:10:45 +0000
committerJeremy Allison <jra@samba.org>1998-08-13 02:10:45 +0000
commitce333b25dba43822b7f06b3afbd6c3cee04f357e (patch)
tree09dae243705c250fab4b432311c69c3aa62c0386 /source3
parentb067f0e2b921a7ac221d47a91d408526935363b2 (diff)
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More blocking lock code - still #ifdef'ed out - under development.
Jeremy. (This used to be commit c9695bdf2e22c3081841f116af37340308d447aa)
Diffstat (limited to 'source3')
-rw-r--r--source3/locking/locking.c180
1 files changed, 170 insertions, 10 deletions
diff --git a/source3/locking/locking.c b/source3/locking/locking.c
index f15c76ba6d..da5cdf46dd 100644
--- a/source3/locking/locking.c
+++ b/source3/locking/locking.c
@@ -35,6 +35,7 @@
extern int DEBUGLEVEL;
extern connection_struct Connections[];
extern files_struct Files[];
+extern int Client;
static struct share_ops *share_ops;
@@ -94,6 +95,154 @@ for fnum = %d, name = %s\n", blr->expire_time, fnum, Files[fnum].name ));
}
/****************************************************************************
+ Return a blocking lock success SMB.
+*****************************************************************************/
+
+void blocking_lock_reply_success(blocking_lock_record *blr)
+{
+ extern int chain_size;
+ extern int chain_fnum;
+ extern char *OutBuffer;
+ char *outbuf = OutBuffer;
+ int bufsize = BUFFER_SIZE;
+ char *inbuf = blr->inbuf;
+ int fnum = GETFNUM(inbuf,smb_vwv2);
+ int outsize = 0;
+
+ 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.
+ */
+
+ chain_fnum = fnum;
+ chain_size = 0;
+
+ outsize = chain_reply(inbuf,outbuf,blr->length,bufsize);
+
+ outsize += chain_size;
+
+ if(outsize > 4)
+ smb_setlen(outbuf,outsize - 4);
+
+ send_smb(Client,outbuf);
+}
+
+/****************************************************************************
+ Return a lock fail error. Undo all the locks we have obtained first.
+*****************************************************************************/
+
+void blocking_lock_reply_error(blocking_lock_record *blr, int eclass, int32 ecode)
+{
+ extern char *OutBuffer;
+ char *outbuf = OutBuffer;
+ int bufsize = BUFFER_SIZE;
+ char *inbuf = blr->inbuf;
+ int fnum = GETFNUM(inbuf,smb_vwv2);
+ uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
+ uint16 num_locks = SVAL(inbuf,smb_vwv7);
+ uint32 count, offset;
+ int cnum;
+ int lock_num = blr->lock_num;
+ char *data;
+ int i;
+
+ cnum = SVAL(inbuf,smb_tid);
+
+ data = smb_buf(inbuf) + 10*num_ulocks;
+
+ /*
+ * Data now points at the beginning of the list
+ * of smb_lkrng structs.
+ */
+
+ for(i = blr->lock_num; i >= 0; i--) {
+ count = IVAL(data,SMB_LKLEN_OFFSET(i));
+ offset = IVAL(data,SMB_LKOFF_OFFSET(i));
+ do_unlock(fnum,cnum,count,offset,&dummy1,&dummy2);
+ }
+
+ construct_reply_common(inbuf, outbuf);
+ ERROR(eclass,ecode);
+ send_smb(Client,outbuf);
+}
+
+/****************************************************************************
+ Attempt to finish off getting all pending blocking locks.
+ Returns True if we want to be removed from the list.
+*****************************************************************************/
+
+BOOL blocking_lock_record_process(blocking_lock_record *blr)
+{
+ char *inbuf = blr->inbuf;
+ unsigned char locktype = CVAL(inbuf,smb_vwv3);
+ int fnum = GETFNUM(inbuf,smb_vwv2);
+ uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
+ uint16 num_locks = SVAL(inbuf,smb_vwv7);
+ uint32 count, offset;
+ int cnum;
+ int lock_num = blr->lock_num;
+ char *data;
+ int eclass=0;
+ uint32 ecode=0;
+
+ cnum = SVAL(inbuf,smb_tid);
+
+ data = smb_buf(inbuf) + 10*num_ulocks;
+
+ /*
+ * Data now points at the beginning of the list
+ * of smb_lkrng structs.
+ */
+
+ for(; blr->lock_num < num_locks; blr->lock_num++) {
+ count = IVAL(data,SMB_LKLEN_OFFSET(blr->lock_num));
+ offset = IVAL(data,SMB_LKOFF_OFFSET(blr->lock_num));
+ if(!do_lock(fnum,cnum,count,offset, ((locktype & 1) ? F_RDLCK : F_WRLCK),
+ &eclass, &ecode))
+ break;
+ }
+
+ if(blr->lock_num == num_locks) {
+
+ /*
+ * Success - we got all the locks.
+ */
+
+ DEBUG(3,("blocking_lock_record_process fnum=%d cnum=%d type=%d num_locks=%d\n",
+ fnum, cnum, (unsigned int)locktype, num_locks) );
+
+ blocking_lock_reply_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.
+ */
+
+ blocking_lock_reply_error(blr, eclass, ecode);
+ return True;
+ }
+
+ /*
+ * Still can't get all the locks - keep waiting.
+ */
+
+ DEBUG(10,("blocking_lock_record_process: only got %d locks of %d needed for fnum = %d. \
+Waiting..\n", blr->lock_num, num_locks, fnum ));
+
+ return False;
+}
+
+/****************************************************************************
Process the blocking lock queue. Note that this is only called as root.
*****************************************************************************/
@@ -116,14 +265,18 @@ void process_blocking_lock_queue(time_t t)
uint16 vuid = (lp_security() == SEC_SHARE) ? UID_FIELD_INVALID :
SVAL(blr->inbuf,smb_uid);
- if(blr->expire_time > t) {
+ DEBUG(5,("process_blocking_lock_queue: examining pending lock fnum = %d for file %s\n",
+ fnum, 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",
+ fnum, fsp->name ));
- blocking_lock_fail(blr);
- blocking_lock_reply_error(blr);
+ blocking_lock_reply_error(blr,ERRSRV,ERRaccess);
free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue));
continue;
@@ -135,7 +288,7 @@ void process_blocking_lock_queue(time_t t)
/*
* Remove the entry and return an error to the client.
*/
- blocking_lock_reply_error(blr);
+ blocking_lock_reply_error(blr,ERRSRV,ERRaccess);
free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue));
continue;
@@ -147,7 +300,7 @@ Error was %s.\n", cnum, strerror(errno) ));
/*
* Remove the entry and return an error to the client.
*/
- blocking_lock_reply_error(blr);
+ blocking_lock_reply_error(blr,ERRSRV,ERRaccess);
free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue));
unbecome_user();
@@ -156,19 +309,26 @@ Error was %s.\n", cnum, strerror(errno) ));
/*
* Go through the remaining locks and try and obtain them.
- * If we get them all then return success and delete this
- * record.
+ * The call returns True if all locks were obtained successfully
+ * and False if we still need to wait.
*/
if(blocking_lock_record_process(blr)) {
- /*
- * Success -
- unbecome_user();
+ free_blocking_lock_record((blocking_lock_record *)ubi_slRemNext( &blocking_lock_queue, prev));
+ blr = (blocking_lock_record *)(prev ? ubi_slNext(prev) : ubi_slFirst(&change_notify_queue));
+ unbecome_user();
+ continue;
+ }
+
+ unbecome_user();
+
+ /*
* Move to the next in the list.
*/
prev = blr;
blr = (blocking_lock_record *)ubi_slNext(blr);
}
+}
#endif /* JRATEST */
/****************************************************************************