/*
- 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
*/
#include "includes.h"
-extern int DEBUGLEVEL;
+
extern char *OutBuffer;
/****************************************************************************
*****************************************************************************/
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)
{
- free(blr->inbuf);
- free((char *)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;
-
- 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.
- */
-
- 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" ));
- free((char *)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;
-
- ubi_slAddTail(&blocking_lock_queue, blr);
-
-
- DEBUG(3,("push_blocking_lock_request: lock request length=%d blocked with expiry time %d \
-for fnum = %d, name = %s\n", length, (int)blr->expire_time,
- blr->fsp->fnum, blr->fsp->fsp_name ));
-
- return True;
+ 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;
+ }
+
+ /*
+ * 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->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;
+ 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);
+
+ /* 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) \
+for fnum = %d, name = %s\n", length, (int)blr->expire_time, lock_timeout,
+ blr->fsp->fnum, blr->fsp->fsp_name ));
+
+ /* Push the MID of this packet on the signing queue. */
+ srv_defer_sign_response(SVAL(inbuf,smb_mid));
+
+ return True;
}
/****************************************************************************
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.");
}
/****************************************************************************
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);
}
/****************************************************************************
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);
-
- 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);
+ char *outbuf = OutBuffer;
+ 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.");
}
/****************************************************************************
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_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 = (SMB_BIG_UINT)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_spin( fsp, conn, SVAL(inbuf,smb_pid), (SMB_BIG_UINT)numtoread, startpos, READ_LOCK, &my_lock_ctx);
+ if (NT_STATUS_V(status)) {
+ 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. 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_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_TO_SMB_OFF_T(inbuf,smb_vwv1);
+ offset = IVAL_TO_SMB_OFF_T(inbuf,smb_vwv3);
+
+ errno = 0;
+ status = do_lock_spin(fsp, conn, SVAL(inbuf,smb_pid), count, offset, WRITE_LOCK, &my_lock_ctx);
+ if (NT_STATUS_IS_ERR(status)) {
+ 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. 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;
+ BOOL my_lock_ctx = False;
+ 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_spin(fsp,conn,lock_pid,count,offset,
+ ((locktype & 1) ? READ_LOCK : WRITE_LOCK), &my_lock_ctx);
+ 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 (!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;
+ }
+
+ /*
+ * 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;
}
/****************************************************************************
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);
+
+ 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);
+ }
}
/****************************************************************************
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,0,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);
+ }
+}
+
+/****************************************************************************
+ Set a flag as an unlock request affects one of our pending locks.
+*****************************************************************************/
- prev = blr;
- blr = (blocking_lock_record *)ubi_slNext(blr);
- }
+static void received_unlock_msg(int msg_type, pid_t src, void *buf, size_t len)
+{
+ DEBUG(10,("received_unlock_msg\n"));
+ process_blocking_lock_queue(time(NULL));
}
/****************************************************************************
- Return True if the blocking lock queue has entries.
+ Return the number of seconds to the next blocking locks timeout, or default_timeout
*****************************************************************************/
-BOOL blocking_locks_pending(void)
+unsigned blocking_locks_timeout(unsigned default_timeout)
{
- blocking_lock_record *blr = (blocking_lock_record *)ubi_slFirst( &blocking_lock_queue );
- return (blr == NULL ? False : True);
+ 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,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(&blocking_lock_queue));
- continue;
- }
-
- if(!become_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);
- 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)) {
- 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);
- 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();
- 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));
- unbecome_user();
- continue;
- }
-
- unbecome_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