sin/samba-mirror
1
0
Fork 0
mirror of https://github.com/samba-team/samba.git synced 2025-12-04 08:23:50 +03:00
Code Activity

r23183: Check in a change made by Tridge:

Browse Source 
This replaces the internal explicit dev/ino file id representation by a
"struct file_id". This is necessary as cluster file systems and NFS
don't necessarily assign the same device number to the shared file
system. With this structure in place we can now easily add different
schemes to map a file to a unique 64-bit device node.

Jeremy, you might note that I did not change the external interface of
smb_share_modes.c.

Volker
This commit is contained in:
Volker Lendecke
2007-05-29 09:30:34 +00:00
committed by Gerald (Jerry) Carter
parent 0153386c1a
commit 9b10dbbd5d
23 changed files with 366 additions and 314 deletions
Download Patch File Download Diff File Expand all files Collapse all files

102
source/lib/file_id.c Normal file
View File

@@ -0,0 +1,102 @@
/*
Unix SMB/CIFS implementation.
file_id structure handling
Copyright (C) Andrew Tridgell 2007
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
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.
*/
#include "includes.h"
/*
return a file_id which gives a unique ID for a file given the device and
inode numbers
*/
static struct file_id file_id_create(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;
}
/*
generate a file_id from a stat structure
*/
struct file_id file_id_sbuf(const SMB_STRUCT_STAT *sbuf)
{
return file_id_create(sbuf->st_dev, sbuf->st_ino);
}
/*
return True if two file_id structures are equal
*/
BOOL file_id_equal(const struct file_id *id1, const struct file_id *id2)
{
return id1->inode == id2->inode && id1->devid == id2->devid;
}
/*
a static string for a file_id structure
*/
const char *file_id_static_string(const struct file_id *id)
{
static char buf[32];
snprintf(buf, sizeof(buf), "%llx:%llx",
(unsigned long long)id->devid,
(unsigned long long)id->inode);
return buf;
}
/*
a 2nd static string for a file_id structure so we can print 2 at once
*/
const char *file_id_static_string2(const struct file_id *id)
{
static char buf[32];
snprintf(buf, sizeof(buf), "%llx:%llx",
(unsigned long long)id->devid,
(unsigned long long)id->inode);
return buf;
}
/*
push a 16 byte version of a file id into a buffer
*/
void push_file_id_16(char *buf, const struct file_id *id)
{
SIVAL(buf, 0, id->devid&0xFFFFFFFF);
SIVAL(buf, 4, id->devid>>32);
SIVAL(buf, 8, id->inode&0xFFFFFFFF);
SIVAL(buf, 12, id->inode>>32);
}
/*
pul a 16 byte version of a file id from a buffer
*/
void pull_file_id_16(char *buf, struct file_id *id)
{
ZERO_STRUCTP(id);
id->devid = IVAL(buf, 0);
id->devid |= ((uint64_t)IVAL(buf,4))<<32;
id->inode = IVAL(buf, 8);
id->inode |= ((uint64_t)IVAL(buf,12))<<32;
}