/*
- Unix SMB/Netbios implementation.
- Version 1.9.
+ Unix SMB/CIFS implementation.
Blocking Locking functions
Copyright (C) Jeremy Allison 1998
*/
#include "includes.h"
-extern int DEBUGLEVEL;
+
extern char *OutBuffer;
/****************************************************************************
static void free_blocking_lock_record(blocking_lock_record *blr)
{
- free(blr->inbuf);
- free((char *)blr);
+ SAFE_FREE(blr->inbuf);
+ SAFE_FREE(blr);
}
/****************************************************************************
if((blr->inbuf = (char *)malloc(length)) == NULL) {
DEBUG(0,("push_blocking_lock_request: Malloc fail (2)!\n" ));
- free((char *)blr);
+ SAFE_FREE(blr);
return False;
}
static void send_blocking_reply(char *outbuf, int outsize)
{
- if(outsize > 4)
- smb_setlen(outbuf,outsize - 4);
+ if(outsize > 4)
+ smb_setlen(outbuf,outsize - 4);
- send_smb(smbd_server_fd(),outbuf);
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("send_blocking_reply: send_smb failed.");
}
/****************************************************************************
Return a generic lock fail error blocking call.
*****************************************************************************/
-static void generic_blocking_lock_error(blocking_lock_record *blr, int eclass, int32 ecode)
+static void generic_blocking_lock_error(blocking_lock_record *blr, NTSTATUS status)
{
- char *outbuf = OutBuffer;
- char *inbuf = blr->inbuf;
- construct_reply_common(inbuf, outbuf);
+ char *outbuf = OutBuffer;
+ char *inbuf = blr->inbuf;
+ construct_reply_common(inbuf, outbuf);
- if(eclass == 0) /* NT Error. */
- SSVAL(outbuf,smb_flg2, SVAL(outbuf,smb_flg2) | FLAGS2_32_BIT_ERROR_CODES);
-
- ERROR(eclass,ecode);
- send_smb(smbd_server_fd(),outbuf);
+ ERROR_NT(status);
+ if (!send_smb(smbd_server_fd(),outbuf))
+ exit_server("generic_blocking_lock_error: send_smb failed.");
}
/****************************************************************************
obtained first.
*****************************************************************************/
-static void reply_lockingX_error(blocking_lock_record *blr, int eclass, int32 ecode)
+static void reply_lockingX_error(blocking_lock_record *blr, NTSTATUS status)
{
- char *inbuf = blr->inbuf;
- files_struct *fsp = blr->fsp;
- connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
- uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
- SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT) 0;
- unsigned char locktype = CVAL(inbuf,smb_vwv3);
- BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
- char *data;
- int i;
-
- data = smb_buf(inbuf) + ((large_file_format ? 20 : 10)*num_ulocks);
-
- /*
- * Data now points at the beginning of the list
- * of smb_lkrng structs.
- */
-
- /*
- * Ensure we don't do a remove on the lock that just failed,
- * as under POSIX rules, if we have a lock already there, we
- * will delete it (and we shouldn't) .....
- */
-
- for(i = blr->lock_num - 1; i >= 0; i--) {
- int dummy1;
- uint32 dummy2;
- BOOL err;
-
- count = get_lock_count( data, i, large_file_format);
- offset = get_lock_offset( data, i, large_file_format, &err);
-
- /*
- * We know err cannot be set as if it was the lock
- * request would never have been queued. JRA.
- */
-
- do_unlock(fsp,conn,count,offset,&dummy1,&dummy2);
- }
-
- generic_blocking_lock_error(blr, eclass, ecode);
+ char *inbuf = blr->inbuf;
+ files_struct *fsp = blr->fsp;
+ connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
+ uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
+ SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT) 0;
+ uint16 lock_pid;
+ unsigned char locktype = CVAL(inbuf,smb_vwv3);
+ BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
+ char *data;
+ int i;
+
+ data = smb_buf(inbuf) + ((large_file_format ? 20 : 10)*num_ulocks);
+
+ /*
+ * Data now points at the beginning of the list
+ * of smb_lkrng structs.
+ */
+
+ /*
+ * Ensure we don't do a remove on the lock that just failed,
+ * as under POSIX rules, if we have a lock already there, we
+ * will delete it (and we shouldn't) .....
+ */
+
+ for(i = blr->lock_num - 1; i >= 0; i--) {
+ BOOL err;
+
+ lock_pid = get_lock_pid( data, i, large_file_format);
+ count = get_lock_count( data, i, large_file_format);
+ offset = get_lock_offset( data, i, large_file_format, &err);
+
+ /*
+ * We know err cannot be set as if it was the lock
+ * request would never have been queued. JRA.
+ */
+
+ do_unlock(fsp,conn,lock_pid,count,offset);
+ }
+
+ generic_blocking_lock_error(blr, status);
}
/****************************************************************************
Return a lock fail error.
*****************************************************************************/
-static void blocking_lock_reply_error(blocking_lock_record *blr, int eclass, int32 ecode)
+static void blocking_lock_reply_error(blocking_lock_record *blr, NTSTATUS status)
{
- switch(blr->com_type) {
- case SMBlock:
- generic_blocking_lock_error(blr, eclass, ecode);
- break;
- case SMBlockread:
- generic_blocking_lock_error(blr, eclass, ecode);
- break;
- case SMBlockingX:
- reply_lockingX_error(blr, eclass, ecode);
- break;
- default:
- DEBUG(0,("blocking_lock_reply_error: PANIC - unknown type on blocking lock queue - exiting.!\n"));
- exit_server("PANIC - unknown type on blocking lock queue");
- }
+ switch(blr->com_type) {
+ case SMBlock:
+ case SMBlockread:
+ generic_blocking_lock_error(blr, status);
+ break;
+ case SMBlockingX:
+ reply_lockingX_error(blr, status);
+ break;
+ default:
+ DEBUG(0,("blocking_lock_reply_error: PANIC - unknown type on blocking lock queue - exiting.!\n"));
+ exit_server("PANIC - unknown type on blocking lock queue");
+ }
}
/****************************************************************************
static BOOL process_lockread(blocking_lock_record *blr)
{
- char *outbuf = OutBuffer;
- char *inbuf = blr->inbuf;
- ssize_t nread = -1;
- char *data;
- int outsize = 0;
- SMB_OFF_T startpos;
- size_t numtoread;
- int eclass;
- uint32 ecode;
- connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
- files_struct *fsp = blr->fsp;
-
- numtoread = SVAL(inbuf,smb_vwv1);
- startpos = IVAL(inbuf,smb_vwv2);
+ char *outbuf = OutBuffer;
+ char *inbuf = blr->inbuf;
+ ssize_t nread = -1;
+ char *data, *p;
+ int outsize = 0;
+ SMB_OFF_T startpos;
+ size_t numtoread;
+ NTSTATUS status;
+ connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
+ files_struct *fsp = blr->fsp;
+
+ numtoread = SVAL(inbuf,smb_vwv1);
+ startpos = IVAL(inbuf,smb_vwv2);
+
+ numtoread = MIN(BUFFER_SIZE-outsize,numtoread);
+ data = smb_buf(outbuf) + 3;
- numtoread = MIN(BUFFER_SIZE-outsize,numtoread);
- data = smb_buf(outbuf) + 3;
-
- if(!do_lock( fsp, conn, (SMB_BIG_UINT)numtoread, (SMB_BIG_UINT)startpos, READ_LOCK, &eclass, &ecode)) {
- if((errno != EACCES) && (errno != EAGAIN)) {
- /*
- * We have other than a "can't get lock" POSIX
- * error. Send an error.
- * Return True so we get dequeued.
- */
-
- generic_blocking_lock_error(blr, eclass, ecode);
- return True;
- }
-
- /*
- * Still waiting for lock....
- */
-
- DEBUG(10,("process_lockread: failed to get lock for file = %s. Still waiting....\n",
- fsp->fsp_name));
- return False;
- }
-
- nread = read_file(fsp,data,startpos,numtoread);
-
- if (nread < 0) {
- generic_blocking_lock_error(blr,ERRDOS,ERRnoaccess);
- return True;
- }
-
- construct_reply_common(inbuf, outbuf);
- outsize = set_message(outbuf,5,3,True);
-
- outsize += nread;
- SSVAL(outbuf,smb_vwv0,nread);
- SSVAL(outbuf,smb_vwv5,nread+3);
- SSVAL(smb_buf(outbuf),1,nread);
-
- DEBUG(3, ( "process_lockread file = %s, fnum=%d num=%d nread=%d\n",
- fsp->fsp_name, fsp->fnum, (int)numtoread, (int)nread ) );
-
- send_blocking_reply(outbuf,outsize);
- return True;
+ status = do_lock( fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)numtoread,
+ (SMB_BIG_UINT)startpos, READ_LOCK);
+ if (NT_STATUS_V(status)) {
+ if ((errno != EACCES) && (errno != EAGAIN)) {
+ /*
+ * We have other than a "can't get lock" POSIX
+ * error. Send an error.
+ * Return True so we get dequeued.
+ */
+ generic_blocking_lock_error(blr, status);
+ return True;
+ }
+
+ /*
+ * Still waiting for lock....
+ */
+
+ DEBUG(10,("process_lockread: failed to get lock for file = %s. Still waiting....\n",
+ fsp->fsp_name));
+ return False;
+ }
+
+ nread = read_file(fsp,data,startpos,numtoread);
+
+ if (nread < 0) {
+ generic_blocking_lock_error(blr,NT_STATUS_ACCESS_DENIED);
+ return True;
+ }
+
+ construct_reply_common(inbuf, outbuf);
+ outsize = set_message(outbuf,5,0,True);
+
+ outsize += nread;
+ SSVAL(outbuf,smb_vwv0,nread);
+ SSVAL(outbuf,smb_vwv5,nread+3);
+ p = smb_buf(outbuf);
+ *p++ = 1;
+ SSVAL(p,0,nread); p += 2;
+ set_message_end(outbuf, p+nread);
+
+ DEBUG(3, ( "process_lockread file = %s, fnum=%d num=%d nread=%d\n",
+ fsp->fsp_name, fsp->fnum, (int)numtoread, (int)nread ) );
+
+ send_blocking_reply(outbuf,outsize);
+ return True;
}
/****************************************************************************
static BOOL process_lock(blocking_lock_record *blr)
{
- char *outbuf = OutBuffer;
- char *inbuf = blr->inbuf;
- int outsize;
- SMB_OFF_T count = 0, offset = 0;
- int eclass;
- uint32 ecode;
- connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
- files_struct *fsp = blr->fsp;
-
- count = IVAL(inbuf,smb_vwv1);
- offset = IVAL(inbuf,smb_vwv3);
-
- errno = 0;
- if (!do_lock(fsp, conn, (SMB_BIG_UINT)count, (SMB_BIG_UINT)offset, WRITE_LOCK, &eclass, &ecode)) {
- if((errno != EACCES) && (errno != EAGAIN)) {
-
- /*
- * We have other than a "can't get lock" POSIX
- * error. Send an error.
- * Return True so we get dequeued.
- */
-
- blocking_lock_reply_error(blr, eclass, ecode);
- return True;
- }
-
- /*
- * Still can't get the lock - keep waiting.
- */
-
- DEBUG(10,("process_lock: failed to get lock for file = %s. Still waiting....\n",
- fsp->fsp_name));
- return False;
- }
-
- /*
- * Success - we got the lock.
- */
-
- DEBUG(3,("process_lock : file=%s fnum=%d offset=%.0f count=%.0f\n",
- fsp->fsp_name, fsp->fnum, (double)offset, (double)count));
-
- construct_reply_common(inbuf, outbuf);
- outsize = set_message(outbuf,0,0,True);
- send_blocking_reply(outbuf,outsize);
- return True;
+ char *outbuf = OutBuffer;
+ char *inbuf = blr->inbuf;
+ int outsize;
+ SMB_OFF_T count = 0, offset = 0;
+ NTSTATUS status;
+ connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
+ files_struct *fsp = blr->fsp;
+
+ count = IVAL(inbuf,smb_vwv1);
+ offset = IVAL(inbuf,smb_vwv3);
+
+ errno = 0;
+ status = do_lock(fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)count,
+ (SMB_BIG_UINT)offset, WRITE_LOCK);
+ if (NT_STATUS_IS_ERR(status)) {
+ if((errno != EACCES) && (errno != EAGAIN)) {
+ /*
+ * We have other than a "can't get lock" POSIX
+ * error. Send an error.
+ * Return True so we get dequeued.
+ */
+
+ blocking_lock_reply_error(blr, status);
+ return True;
+ }
+ /*
+ * Still can't get the lock - keep waiting.
+ */
+ DEBUG(10,("process_lock: failed to get lock for file = %s. Still waiting....\n",
+ fsp->fsp_name));
+ return False;
+ }
+
+ /*
+ * Success - we got the lock.
+ */
+
+ DEBUG(3,("process_lock : file=%s fnum=%d offset=%.0f count=%.0f\n",
+ fsp->fsp_name, fsp->fnum, (double)offset, (double)count));
+
+ construct_reply_common(inbuf, outbuf);
+ outsize = set_message(outbuf,0,0,True);
+ send_blocking_reply(outbuf,outsize);
+ return True;
}
/****************************************************************************
static BOOL process_lockingX(blocking_lock_record *blr)
{
- char *inbuf = blr->inbuf;
- unsigned char locktype = CVAL(inbuf,smb_vwv3);
- files_struct *fsp = blr->fsp;
- connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
- uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
- uint16 num_locks = SVAL(inbuf,smb_vwv7);
- SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT)0;
- BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
- char *data;
- int eclass=0;
- uint32 ecode=0;
-
- data = smb_buf(inbuf) + ((large_file_format ? 20 : 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++) {
- BOOL err;
-
- count = get_lock_count( data, blr->lock_num, large_file_format);
- offset = get_lock_offset( data, blr->lock_num, large_file_format, &err);
-
- /*
- * We know err cannot be set as if it was the lock
- * request would never have been queued. JRA.
- */
- errno = 0;
- if(!do_lock(fsp,conn,count,offset, ((locktype & 1) ? READ_LOCK : WRITE_LOCK),
- &eclass, &ecode))
- break;
- }
-
- if(blr->lock_num == num_locks) {
-
- /*
- * Success - we got all the locks.
- */
-
- DEBUG(3,("process_lockingX file = %s, fnum=%d type=%d num_locks=%d\n",
- fsp->fsp_name, fsp->fnum, (unsigned int)locktype, num_locks) );
-
- 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.
- */
-
- blocking_lock_reply_error(blr, eclass, ecode);
- return True;
- }
-
- /*
- * Still can't get all the locks - keep waiting.
- */
-
- DEBUG(10,("process_lockingX: only got %d locks of %d needed for file %s, fnum = %d. \
-Waiting....\n", blr->lock_num, num_locks, fsp->fsp_name, fsp->fnum));
-
- return False;
+ char *inbuf = blr->inbuf;
+ unsigned char locktype = CVAL(inbuf,smb_vwv3);
+ files_struct *fsp = blr->fsp;
+ connection_struct *conn = conn_find(SVAL(inbuf,smb_tid));
+ uint16 num_ulocks = SVAL(inbuf,smb_vwv6);
+ uint16 num_locks = SVAL(inbuf,smb_vwv7);
+ SMB_BIG_UINT count = (SMB_BIG_UINT)0, offset = (SMB_BIG_UINT)0;
+ uint16 lock_pid;
+ BOOL large_file_format = (locktype & LOCKING_ANDX_LARGE_FILES);
+ char *data;
+ NTSTATUS status = NT_STATUS_OK;
+
+ data = smb_buf(inbuf) + ((large_file_format ? 20 : 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++) {
+ BOOL err;
+
+ lock_pid = get_lock_pid( data, blr->lock_num, large_file_format);
+ count = get_lock_count( data, blr->lock_num, large_file_format);
+ offset = get_lock_offset( data, blr->lock_num, large_file_format, &err);
+
+ /*
+ * We know err cannot be set as if it was the lock
+ * request would never have been queued. JRA.
+ */
+ errno = 0;
+ status = do_lock(fsp,conn,lock_pid,count,offset,
+ ((locktype & 1) ? READ_LOCK : WRITE_LOCK));
+ if (NT_STATUS_IS_ERR(status)) break;
+ }
+
+ if(blr->lock_num == num_locks) {
+ /*
+ * Success - we got all the locks.
+ */
+
+ DEBUG(3,("process_lockingX file = %s, fnum=%d type=%d num_locks=%d\n",
+ fsp->fsp_name, fsp->fnum, (unsigned int)locktype, num_locks) );
+
+ 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.
+ */
+
+ blocking_lock_reply_error(blr, status);
+ return True;
+ }
+
+ /*
+ * Still can't get all the locks - keep waiting.
+ */
+
+ DEBUG(10,("process_lockingX: only got %d locks of %d needed for file %s, fnum = %d. \
+Waiting....\n",
+ blr->lock_num, num_locks, fsp->fsp_name, fsp->fnum));
+
+ return False;
}
/****************************************************************************
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,0,NT_STATUS_CANCELLED);
+ 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;
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,ERRSRV,ERRaccess);
+ 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(!become_user(conn,vuid)) {
+ 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,ERRSRV,ERRaccess);
+ 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(!become_service(conn,True)) {
+ 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,ERRSRV,ERRaccess);
+ 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));
- unbecome_user();
+ change_to_root_user();
continue;
}
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));
- unbecome_user();
+ change_to_root_user();
continue;
}
- unbecome_user();
+ change_to_root_user();
/*
* Move to the next in the list.
git.samba.org / ira / wip.git / blobdiff