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kernel-fxtec-pro1x/drivers/mtd/tests/mtd_oobtest.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

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/*
* Copyright (C) 2006-2008 Nokia Corporation
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* 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; see the file COPYING. If not, write to the Free Software
* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* Test OOB read and write on MTD device.
*
* Author: Adrian Hunter <ext-adrian.hunter@nokia.com>
*/
#include <asm/div64.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/err.h>
#include <linux/mtd/mtd.h>
#include <linux/slab.h>
#include <linux/sched.h>
#define PRINT_PREF KERN_INFO "mtd_oobtest: "
static int dev;
module_param(dev, int, S_IRUGO);
MODULE_PARM_DESC(dev, "MTD device number to use");
static struct mtd_info *mtd;
static unsigned char *readbuf;
static unsigned char *writebuf;
static unsigned char *bbt;
static int ebcnt;
static int pgcnt;
static int errcnt;
static int use_offset;
static int use_len;
static int use_len_max;
static int vary_offset;
static unsigned long next = 1;
static inline unsigned int simple_rand(void)
{
next = next * 1103515245 + 12345;
return (unsigned int)((next / 65536) % 32768);
}
static inline void simple_srand(unsigned long seed)
{
next = seed;
}
static void set_random_data(unsigned char *buf, size_t len)
{
size_t i;
for (i = 0; i < len; ++i)
buf[i] = simple_rand();
}
static int erase_eraseblock(int ebnum)
{
int err;
struct erase_info ei;
loff_t addr = ebnum * mtd->erasesize;
memset(&ei, 0, sizeof(struct erase_info));
ei.mtd = mtd;
ei.addr = addr;
ei.len = mtd->erasesize;
err = mtd->erase(mtd, &ei);
if (err) {
printk(PRINT_PREF "error %d while erasing EB %d\n", err, ebnum);
return err;
}
if (ei.state == MTD_ERASE_FAILED) {
printk(PRINT_PREF "some erase error occurred at EB %d\n",
ebnum);
return -EIO;
}
return 0;
}
static int erase_whole_device(void)
{
int err;
unsigned int i;
printk(PRINT_PREF "erasing whole device\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = erase_eraseblock(i);
if (err)
return err;
cond_resched();
}
printk(PRINT_PREF "erased %u eraseblocks\n", i);
return 0;
}
static void do_vary_offset(void)
{
use_len -= 1;
if (use_len < 1) {
use_offset += 1;
if (use_offset >= use_len_max)
use_offset = 0;
use_len = use_len_max - use_offset;
}
}
static int write_eraseblock(int ebnum)
{
int i;
struct mtd_oob_ops ops;
int err = 0;
loff_t addr = ebnum * mtd->erasesize;
for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
set_random_data(writebuf, use_len);
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = use_len;
ops.oobretlen = 0;
ops.ooboffs = use_offset;
ops.datbuf = NULL;
ops.oobbuf = writebuf;
err = mtd->write_oob(mtd, addr, &ops);
if (err || ops.oobretlen != use_len) {
printk(PRINT_PREF "error: writeoob failed at %#llx\n",
(long long)addr);
printk(PRINT_PREF "error: use_len %d, use_offset %d\n",
use_len, use_offset);
errcnt += 1;
return err ? err : -1;
}
if (vary_offset)
do_vary_offset();
}
return err;
}
static int write_whole_device(void)
{
int err;
unsigned int i;
printk(PRINT_PREF "writing OOBs of whole device\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = write_eraseblock(i);
if (err)
return err;
if (i % 256 == 0)
printk(PRINT_PREF "written up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "written %u eraseblocks\n", i);
return 0;
}
static int verify_eraseblock(int ebnum)
{
int i;
struct mtd_oob_ops ops;
int err = 0;
loff_t addr = ebnum * mtd->erasesize;
for (i = 0; i < pgcnt; ++i, addr += mtd->writesize) {
set_random_data(writebuf, use_len);
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = use_len;
ops.oobretlen = 0;
ops.ooboffs = use_offset;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != use_len) {
printk(PRINT_PREF "error: readoob failed at %#llx\n",
(long long)addr);
errcnt += 1;
return err ? err : -1;
}
if (memcmp(readbuf, writebuf, use_len)) {
printk(PRINT_PREF "error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too many errors\n");
return -1;
}
}
if (use_offset != 0 || use_len < mtd->ecclayout->oobavail) {
int k;
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != mtd->ecclayout->oobavail) {
printk(PRINT_PREF "error: readoob failed at "
"%#llx\n", (long long)addr);
errcnt += 1;
return err ? err : -1;
}
if (memcmp(readbuf + use_offset, writebuf, use_len)) {
printk(PRINT_PREF "error: verify failed at "
"%#llx\n", (long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too many "
"errors\n");
return -1;
}
}
for (k = 0; k < use_offset; ++k)
if (readbuf[k] != 0xff) {
printk(PRINT_PREF "error: verify 0xff "
"failed at %#llx\n",
(long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too "
"many errors\n");
return -1;
}
}
for (k = use_offset + use_len;
k < mtd->ecclayout->oobavail; ++k)
if (readbuf[k] != 0xff) {
printk(PRINT_PREF "error: verify 0xff "
"failed at %#llx\n",
(long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too "
"many errors\n");
return -1;
}
}
}
if (vary_offset)
do_vary_offset();
}
return err;
}
static int verify_eraseblock_in_one_go(int ebnum)
{
struct mtd_oob_ops ops;
int err = 0;
loff_t addr = ebnum * mtd->erasesize;
size_t len = mtd->ecclayout->oobavail * pgcnt;
set_random_data(writebuf, len);
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = len;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
if (err || ops.oobretlen != len) {
printk(PRINT_PREF "error: readoob failed at %#llx\n",
(long long)addr);
errcnt += 1;
return err ? err : -1;
}
if (memcmp(readbuf, writebuf, len)) {
printk(PRINT_PREF "error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too many errors\n");
return -1;
}
}
return err;
}
static int verify_all_eraseblocks(void)
{
int err;
unsigned int i;
printk(PRINT_PREF "verifying all eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = verify_eraseblock(i);
if (err)
return err;
if (i % 256 == 0)
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "verified %u eraseblocks\n", i);
return 0;
}
static int is_block_bad(int ebnum)
{
int ret;
loff_t addr = ebnum * mtd->erasesize;
ret = mtd->block_isbad(mtd, addr);
if (ret)
printk(PRINT_PREF "block %d is bad\n", ebnum);
return ret;
}
static int scan_for_bad_eraseblocks(void)
{
int i, bad = 0;
bbt = kmalloc(ebcnt, GFP_KERNEL);
if (!bbt) {
printk(PRINT_PREF "error: cannot allocate memory\n");
return -ENOMEM;
}
printk(PRINT_PREF "scanning for bad eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
bbt[i] = is_block_bad(i) ? 1 : 0;
if (bbt[i])
bad += 1;
cond_resched();
}
printk(PRINT_PREF "scanned %d eraseblocks, %d are bad\n", i, bad);
return 0;
}
static int __init mtd_oobtest_init(void)
{
int err = 0;
unsigned int i;
uint64_t tmp;
struct mtd_oob_ops ops;
loff_t addr = 0, addr0;
printk(KERN_INFO "\n");
printk(KERN_INFO "=================================================\n");
printk(PRINT_PREF "MTD device: %d\n", dev);
mtd = get_mtd_device(NULL, dev);
if (IS_ERR(mtd)) {
err = PTR_ERR(mtd);
printk(PRINT_PREF "error: cannot get MTD device\n");
return err;
}
if (mtd->type != MTD_NANDFLASH) {
printk(PRINT_PREF "this test requires NAND flash\n");
goto out;
}
tmp = mtd->size;
do_div(tmp, mtd->erasesize);
ebcnt = tmp;
pgcnt = mtd->erasesize / mtd->writesize;
printk(PRINT_PREF "MTD device size %llu, eraseblock size %u, "
"page size %u, count of eraseblocks %u, pages per "
"eraseblock %u, OOB size %u\n",
(unsigned long long)mtd->size, mtd->erasesize,
mtd->writesize, ebcnt, pgcnt, mtd->oobsize);
err = -ENOMEM;
readbuf = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!readbuf) {
printk(PRINT_PREF "error: cannot allocate memory\n");
goto out;
}
writebuf = kmalloc(mtd->erasesize, GFP_KERNEL);
if (!writebuf) {
printk(PRINT_PREF "error: cannot allocate memory\n");
goto out;
}
err = scan_for_bad_eraseblocks();
if (err)
goto out;
use_offset = 0;
use_len = mtd->ecclayout->oobavail;
use_len_max = mtd->ecclayout->oobavail;
vary_offset = 0;
/* First test: write all OOB, read it back and verify */
printk(PRINT_PREF "test 1 of 5\n");
err = erase_whole_device();
if (err)
goto out;
simple_srand(1);
err = write_whole_device();
if (err)
goto out;
simple_srand(1);
err = verify_all_eraseblocks();
if (err)
goto out;
/*
* Second test: write all OOB, a block at a time, read it back and
* verify.
*/
printk(PRINT_PREF "test 2 of 5\n");
err = erase_whole_device();
if (err)
goto out;
simple_srand(3);
err = write_whole_device();
if (err)
goto out;
/* Check all eraseblocks */
simple_srand(3);
printk(PRINT_PREF "verifying all eraseblocks\n");
for (i = 0; i < ebcnt; ++i) {
if (bbt[i])
continue;
err = verify_eraseblock_in_one_go(i);
if (err)
goto out;
if (i % 256 == 0)
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "verified %u eraseblocks\n", i);
/*
* Third test: write OOB at varying offsets and lengths, read it back
* and verify.
*/
printk(PRINT_PREF "test 3 of 5\n");
err = erase_whole_device();
if (err)
goto out;
/* Write all eraseblocks */
use_offset = 0;
use_len = mtd->ecclayout->oobavail;
use_len_max = mtd->ecclayout->oobavail;
vary_offset = 1;
simple_srand(5);
err = write_whole_device();
if (err)
goto out;
/* Check all eraseblocks */
use_offset = 0;
use_len = mtd->ecclayout->oobavail;
use_len_max = mtd->ecclayout->oobavail;
vary_offset = 1;
simple_srand(5);
err = verify_all_eraseblocks();
if (err)
goto out;
use_offset = 0;
use_len = mtd->ecclayout->oobavail;
use_len_max = mtd->ecclayout->oobavail;
vary_offset = 0;
/* Fourth test: try to write off end of device */
printk(PRINT_PREF "test 4 of 5\n");
err = erase_whole_device();
if (err)
goto out;
addr0 = 0;
for (i = 0; i < ebcnt && bbt[i]; ++i)
addr0 += mtd->erasesize;
/* Attempt to write off end of OOB */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = 1;
ops.oobretlen = 0;
ops.ooboffs = mtd->ecclayout->oobavail;
ops.datbuf = NULL;
ops.oobbuf = writebuf;
printk(PRINT_PREF "attempting to start write past end of OOB\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->write_oob(mtd, addr0, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: can write past end of OOB\n");
errcnt += 1;
}
/* Attempt to read off end of OOB */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = 1;
ops.oobretlen = 0;
ops.ooboffs = mtd->ecclayout->oobavail;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to start read past end of OOB\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, addr0, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: can read past end of OOB\n");
errcnt += 1;
}
if (bbt[ebcnt - 1])
printk(PRINT_PREF "skipping end of device tests because last "
"block is bad\n");
else {
/* Attempt to write off end of device */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail + 1;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = writebuf;
printk(PRINT_PREF "attempting to write past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: wrote past end of device\n");
errcnt += 1;
}
/* Attempt to read off end of device */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail + 1;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to read past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: read past end of device\n");
errcnt += 1;
}
err = erase_eraseblock(ebcnt - 1);
if (err)
goto out;
/* Attempt to write off end of device */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail;
ops.oobretlen = 0;
ops.ooboffs = 1;
ops.datbuf = NULL;
ops.oobbuf = writebuf;
printk(PRINT_PREF "attempting to write past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->write_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: wrote past end of device\n");
errcnt += 1;
}
/* Attempt to read off end of device */
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail;
ops.oobretlen = 0;
ops.ooboffs = 1;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
printk(PRINT_PREF "attempting to read past end of device\n");
printk(PRINT_PREF "an error is expected...\n");
err = mtd->read_oob(mtd, mtd->size - mtd->writesize, &ops);
if (err) {
printk(PRINT_PREF "error occurred as expected\n");
err = 0;
} else {
printk(PRINT_PREF "error: read past end of device\n");
errcnt += 1;
}
}
/* Fifth test: write / read across block boundaries */
printk(PRINT_PREF "test 5 of 5\n");
/* Erase all eraseblocks */
err = erase_whole_device();
if (err)
goto out;
/* Write all eraseblocks */
simple_srand(11);
printk(PRINT_PREF "writing OOBs of whole device\n");
for (i = 0; i < ebcnt - 1; ++i) {
int cnt = 2;
int pg;
size_t sz = mtd->ecclayout->oobavail;
if (bbt[i] || bbt[i + 1])
continue;
addr = (i + 1) * mtd->erasesize - mtd->writesize;
for (pg = 0; pg < cnt; ++pg) {
set_random_data(writebuf, sz);
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = sz;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = writebuf;
err = mtd->write_oob(mtd, addr, &ops);
if (err)
goto out;
if (i % 256 == 0)
printk(PRINT_PREF "written up to eraseblock "
"%u\n", i);
cond_resched();
addr += mtd->writesize;
}
}
printk(PRINT_PREF "written %u eraseblocks\n", i);
/* Check all eraseblocks */
simple_srand(11);
printk(PRINT_PREF "verifying all eraseblocks\n");
for (i = 0; i < ebcnt - 1; ++i) {
if (bbt[i] || bbt[i + 1])
continue;
set_random_data(writebuf, mtd->ecclayout->oobavail * 2);
addr = (i + 1) * mtd->erasesize - mtd->writesize;
ops.mode = MTD_OOB_AUTO;
ops.len = 0;
ops.retlen = 0;
ops.ooblen = mtd->ecclayout->oobavail * 2;
ops.oobretlen = 0;
ops.ooboffs = 0;
ops.datbuf = NULL;
ops.oobbuf = readbuf;
err = mtd->read_oob(mtd, addr, &ops);
if (err)
goto out;
if (memcmp(readbuf, writebuf, mtd->ecclayout->oobavail * 2)) {
printk(PRINT_PREF "error: verify failed at %#llx\n",
(long long)addr);
errcnt += 1;
if (errcnt > 1000) {
printk(PRINT_PREF "error: too many errors\n");
goto out;
}
}
if (i % 256 == 0)
printk(PRINT_PREF "verified up to eraseblock %u\n", i);
cond_resched();
}
printk(PRINT_PREF "verified %u eraseblocks\n", i);
printk(PRINT_PREF "finished with %d errors\n", errcnt);
out:
kfree(bbt);
kfree(writebuf);
kfree(readbuf);
put_mtd_device(mtd);
if (err)
printk(PRINT_PREF "error %d occurred\n", err);
printk(KERN_INFO "=================================================\n");
return err;
}
module_init(mtd_oobtest_init);
static void __exit mtd_oobtest_exit(void)
{
return;
}
module_exit(mtd_oobtest_exit);
MODULE_DESCRIPTION("Out-of-band test module");
MODULE_AUTHOR("Adrian Hunter");
MODULE_LICENSE("GPL");
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