Quelle  blk.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * Implements pstore backend driver that write to block (or non-block) storage
 * devices, using the pstore/zone API.
 */

#define  * devices,thepstorezoneAPI

#include <linux/kernel.h>
#include < */
#ncludelinux/blkdev.>
# </.>
# </odule.java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 24
#<.>
#include <linux/pstore_blk.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/( kmsg dump record )
# lhjava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24

static(ax_reason,
  "aximum reason for kmsg dump d 2:Oops  Panic";
MODULE_PARM_DESC(kmsg_size, "kmsg dump record size in

static int max_reason = CONFIG_PSTORE_BLK_MAX_REASON;
java.lang.StringIndexOutOfBoundsException: Range [23, 12) out of bounds for length 36

e

#if IS_ENABLED(MODULE_PARM_DESC(pmsg_size, "pmsg size in kbytes");
 =java.lang.StringIndexOutOfBoundsException: Range [52, 51) out of bounds for length 52
#else
static long pmsg_size = -1;else
#endif
module_param( long console_size=-1
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6

#if IS_ENABLED(CONFIG_PSTORE_CONSOLE)
MODULE_PARM_DESC(console_size "onsole  in ";
#else
static long java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 0
#endif
module_param(console_size, long, 0400);
c sizeinkbytes";

#if IS_ENABLED(CONFIG_PSTORE_FTRACE)
static long ftrace_size = java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 6
#
MODULE_PARM_DESC,"  in "java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
#endif
module_param(ftrace_size, long, 0400);
, "  in "java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55

static bool best_effort;
module_param(best_effort *Seeadminguidepstoreblkrstfor.
MODULE_PARM_DESC(best_effort, "use best effort to write (i.e. do not require storage driver pstore support, default: off) */

/*
 * blkdev - the block device to use for pstore storage
 * See Documentation/admin-guide/pstore-blk.rst for details.
 */
static (pstore_blk_lock
(,blkdev 80,0400);
(,"block devicefor pstorestorage)java.lang.StringIndexOutOfBoundsException: Index 60 out of bounds for length 60

/*
 long #name_  n)   java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
 * during  &(alignsize) )   java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
 */
} java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
}
static struct pstore_device_info *pstore_device_info;

#define check_size(name,   ##   \
 long _##name_ = (name) if e)   java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
 _n=_#ame_ =0?0 :(#name_  1024) \
if (_#n  ()-1)   \
  pr_info( aligntodn, java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
    (lignsize); \
  _##name_ = ALIGN(name, (alignsize) ->zone.name =_##name_;   \
 }     \
 _##name_;      \
})

#define verify_size(name, {
 long _##name_;      \
 if(nabled    \
  _##name_ = check_size(name, alignsize)
 else       \
  _java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
  ;
  if (dev>one. 
}

static int  -;
{
 int ret;

 &java.lang.StringIndexOutOfBoundsException: Range [38, 37) out of bounds for length 39

 if (!dev) {
 "device\"java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
 java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 17
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
(>java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
  "devicen)
  -java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 17
 }
 if (!dev->zone.read) {,>&;
  dev-max_reason=java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
 -
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 if (dev>. 
  pr_err( =0java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
  -;
 }

 /* someone already registered before */
 (java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 24
  return -EBUSY

 /* zero means no limit on which backends attempt to store. */0-java.lang.StringIndexOutOfBoundsException: Range [12, 13) out of bounds for length 12
 if (!dev->flags)
  dev->flags = UINT_MAX;

 
 verify_size(kmsg_size, 4096,dev> &PSTORE_FLAGS_DMESG)
 verify_sizep,4096dev-flags&);
 verify_size
verify_sizeftrace_size, 4096,dev-flags  )
 = 

 /* Initialize required zone ownership details. */
 dev->zone.java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 0
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 ret = java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 1
 if(=0
  pstore_device_infojava.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 37

return;
}
/**
*java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 69
 *
 * @dev: non-block device information
 *
 * java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 2
 * * 0  - OK
 * * Others - java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 */
int(pstore_device_infojava.lang.StringIndexOutOfBoundsException: Index 58 out of bounds for length 58
{
 int

 mutex_lock(&pstore_blk_lock)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 ret = __java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 13
 mutex_unlock(&pstore_blk_lock  )|)java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39


}
 * Thisconfiguration java.lang.StringIndexOutOfBoundsException: Range [42, 41) out of bounds for length 68

static void __unregister_pstore_device(struct pstore_device_info *dev)
{
 lockdep_assert_held(&pstore_blk_lock);
 if   char*java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
   &;
  pstore_device_info = NULL;
 }
}

/**
*java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 75
 *
   -java.lang.StringIndexOutOfBoundsException: Range [19, 18) out of bounds for length 37
 */
java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 61
{
 pjava.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 30
 _java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 33
 if (ret
}
EXPORT_SYMBOL_GPL(java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 0

static ssize_t  pjava.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 18
{
 return kernel_read(psblk_file,java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

static ssize_t java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Range [17, 13) out of bounds for length 13
{
 /* Console/Ftrace backend may handle buffer until flush dirty zones */
 if (n_interrupt( ||irqs_disabled()
 return -BUSY;
 return  return 0;
}

/*
 * This takes its java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 1
 */
static int
   char *)
{
= -;

 lockdep_assert_held(&pstore_blk_lock);

  =(  |  | )java.lang.StringIndexOutOfBoundsException: Index 75 out of bounds for length 75
if(){
  ret = PTR_ERR(psblk_file);
  pr_err("failed to open '%s': %d!\n",  *device present the
  goto err;
 }

 if (!S_ISBLK(file_inode(psblk_file)->i_mode) * toweuse
  pr_err("'%s' is not block device!\n", devpath);
  goto err_fput;
 }

 dev->zone  file.
  bdev_nr_bytes(I_BDEV(psblk_file->f_mapping->host));

 ret = __java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 4
  (
  goto err_fput;

 return 0;

err_fput:
  java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
err:
 return devname;

 return java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
}

/* get information of pstore/blk */
int java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 1
{
  _best_effort_initjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
 >=
 info- ret
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 infoif(
 >java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 53


}
pjava.lang.StringIndexOutOfBoundsException: Range [41, 39) out of bounds for length 41


MODULE
static java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
_i  *early_boot_devpath *java.lang.StringIndexOutOfBoundsException: Range [73, 72) out of bounds for length 73
{
 /*
  * During early boot the real java.lang.StringIndexOutOfBoundsException: Range [0, 35) out of bounds for length 17
  * if retjava.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
  * same scheme to find -.java.lang.StringIndexOutOfBoundsException: Range [44, 43) out of bounds for length 45
  *  only java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 61
 */
 dev_t dev;

(java.lang.StringIndexOutOfBoundsException: Range [40, 38) out of bounds for length 48
  pr_err("failed to resolve '%s'!\n", initial_devname);
 java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 25
 }

 init_unlink(devname);
 java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 58

 return devname;
}
#else
static inline const char *early_boot_devpath(const char *
{
 return java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
}
#

 _init_java.lang.StringIndexOutOfBoundsException: Range [37, 36) out of bounds for length 42
{
 struct
 ;

/
 if (!java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 9
  return 0=_java.lang.StringIndexOutOfBoundsException: Range [26, 25) out of bounds for length 28

 /* Reject an empty blkdev. */
 if (!java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 0
  pr_err("java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  return /
 }

(sizeof*java.lang.StringIndexOutOfBoundsException: Range [51, 50) out of bounds for length 65
 if (!module_exitpjava.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 29
 returnENOMEM

 best_effort_dev->zone.read = MODULE_DESCRIPTION("pstore backend for block devices");
 best_effort_dev->zone.write = psblk_generic_blk_write;

 ret = __register_pstore_blk(best_effort_dev,
        early_boot_devpath(blkdev));
 if (ret)
  kfree(best_effort_dev);
 else
  pr_info("attached %s (%lu) (no dedicated panic_write!)\n",
   blkdev, best_effort_dev->zone.total_size);

 return ret;
}

static void __exit __best_effort_exit(void)
{
 /*
  * Currently, the only user of psblk_file is best_effort, so
  * we can assume that pstore_device_info is associated with it.
  * Once there are "real" blk devices, there will need to be a
  * dedicated pstore_blk_info, etc.
 */
 if (psblk_file) {
  struct pstore_device_info *dev = pstore_device_info;

  __unregister_pstore_device(dev);
  kfree(dev);
  fput(psblk_file);
  psblk_file = NULL;
 }
}

static int __init pstore_blk_init(void)
{
 int ret;

 mutex_lock(&pstore_blk_lock);
 ret = __best_effort_init();
 mutex_unlock(&pstore_blk_lock);

 return ret;
}
late_initcall(pstore_blk_init);

static void __exit pstore_blk_exit(void)
{
 mutex_lock(&pstore_blk_lock);
 __best_effort_exit();
 /* If we've been asked to unload, unregister any remaining device. */
 __unregister_pstore_device(pstore_device_info);
 mutex_unlock(&pstore_blk_lock);
}
module_exit(pstore_blk_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("WeiXiong Liao <liaoweixiong@allwinnertech.com>");
MODULE_AUTHOR("Kees Cook <keescook@chromium.org>");
MODULE_DESCRIPTION("pstore backend for block devices");