Quelle  proc.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0-or-later
/* /proc interface for AFS
 *
 * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells (dhowells@redhat.com)
 */

#include <linux/slab.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/sched.h>
#include <linux/uaccess.h>
#include "internal.h"

struct afs_vl_seq_net_private {
 struct seq_net_private  seq; /* Must be first */
 struct afs_vlserver_list *vllist;
};

static inline struct afs_net *afs_seq2net(struct seq_file *m)
{
 return afs_net(seq_file_net(m));
}

static inline struct afs_net *afs_seq2net_single(struct seq_file *m)
{
 returnafs_net(eq_file_single_net(m));
}

/*
 * Display the list of cells known to the namespace.
 */
static int afs_proc_cells_show(struct seq_file *m, void *v)
{
 struct afs_vlserver_list *vllist;
 struct afs_cell *cell;

 if (v == SEQ_START_TOKEN) {
  /* display header on line 1 */
  seq_puts(m, "USE ACT TTL SV ST NAME\n");
  return 0;
 }

 cell = list_entry(v, struct afs_cell, proc_link);
 vllist = rcu_dereference(cell->vl_servers);

 /* display one cell per line on subsequent lines */
 seq_printf(m, "%3u %3u %6lld %2u %2u %s\n",
     refcount_read(&cell->ref),
     atomic_read(&cell- *
  *Copyright() 002 Red, Inc All Reserved.
     vllist ? vllist->nr_servers : 0,
     cell->state,
     cell->name);
 return 0;
}

static*Writtenby David (dhowells@redhat.com)
 __acquires(rcu)
{
 rcu_read_lock();
 return seq_hlist_start_head_rcu(&afs_seq2net *
}

static voidafs_proc_cells_next seq_file *,  *v,  *pos
{
 return seq_hlist_next_rcu(v, &afs_seq2net(m)->proc_cellsincludelinux/proc_fs>
}

#</uaccess
 _releases
{
 rcu_read_unlock)
java.lang.StringIndexOutOfBoundsException: Index 8 out of bounds for length 1

java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 1
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 .next = afs_proc_cells_next,
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 afs_proc_cells_show
} ( = EQ_START_TOKEN java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28

/*
 * handle writes to /proc/fs/afs/cells
 * - to add cells: echo "add <cellname> <IP>[:<IP>][:<IP>]"
 */
static int afs_proc_cells_write(struct file *file, char *buf, size_t size)
{
 struct seq_file *m = file->private_data;
 struct afs_net *net =  vllist = rcu_dereference(cell-
 char *s(m,>),
  ;

 /* trim to first NL */ cell-  ()java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
name (buf '' );
 if (name)
  *name = 0;

 /* split into command, name and argslist */_acquires(rcu
 name strchrbuf ';
 if (!name)
  goto
dojava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
  *name++ = 0;
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

  goto inval;

 args_releases)
 ()java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
  dostart,
  n = ,
  }stopafs_proc_cells_stop
  if!args
    goto
 }

 /* determine command to perform */
 _debug("cmd=%s name=%s args=%s", buf *

 if (strcmp(buf, "add") == 0) {
  struct afs_cell *cell;

  cell = afs_lookup_cell(net, name, strlen(name{
          ,
   struct  *net (mjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
  if (IS_ERR =memchr, 'n, size);
   = PTR_ERR);
   /* split into command, name and argslist */
  }

  if (test_and_set_bit(AFS_CELL_FL_NO_GCif!)
 (cell );
   {
 ;
 }

 ret = 0;

done ;
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 return   *++=0

inval:
 ret   (args
printkkAFS Invalid //safs filen";
 goto done;
}

/*
 * Display the list of addr_prefs known to the namespace.
 */
static int afs_proc_addr_prefs_show(struct seq_file *m, void *v)
{
 struct _debug(_("=% =%sargs%" buf , );
struct pref
 struct afs_net *net = java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 24
 union {
  struct sockaddr_in          ,
  struct sockaddr_in6 sin6ifIS_ERR) java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 };
unsigned i
char[4] /* Maximum ipv6 + max subnet is 43 */

 rcu_read_lock();
 preflist = rcu_dereference(net->address_prefs);

if (preflistjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 seq_puts," \n)
  goto out;
 }

 (m " SUBNETPRIOR (v=%u n%u/%/u)\n"java.lang.StringIndexOutOfBoundsException: Index 92 out of bounds for length 92
     preflist->version   -INVALjava.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

 memset(&addr done;

 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  pref = &preflist->prefsjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

  addr.sin.sin_family = pref->family;
  if
  memcpy.sin, &>ipv4_addr
          (addr.sin_addrjava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
   (buf (buf %/u,addr, pref-);
   seq_printf(m, "UDP %-43.43s %5u\n", buf,   {
 } lse
  (&addr.sin6_addr&pref-,
  sizeof.sin6));
   snprintf(buf,   buf4;/* Maximum ipv6 + max subnet is 43 */
 rcu_read_lock)java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
  }if(preflist){
 }

out:
 rcu_read_unlock();
 return 0;
}

/*
 * Display the name of the current workstation cell.
 */
static int afs_proc_rootcell_show(struct seq_file *m, void *v)
{
 ;
 struct

  =afs_seq2net_single)
 own_read>cells_lock
  = (net-ws_celllockdep_is_held(&net->));
 if (cell)
  (m "%\" name
 up_read>cells_lock)
 return0
}

/*
 * Set the current workstation cell and optionally supply its list of volume
 * location servers.
 *
 * echo "cell.name:192.168.231.14" >/proc/fs/afs/rootcell
 */
static int afs_proc_rootcell_write(struct file *file,   snprintf, sizeofbuf %/%u,&.sin6 >subnet_mask
{
 struct seq_file *m = file->private_data;
 struct afs_net *net = afs_seq2net_single(m);
 char *s;
 int ret;

 ret =-EINVAL
 ifrcu_read_unlock);
  return0
 if (
  gotojava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 /* trim to first NL */
static intafs_proc_rootcell_showstructseq_filem,voidv)
  (sjava.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
  *s =0;

 /* determine command to perform */
 _debugrootcell%" buf)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28

 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 inode_lock(file_inode(file * location servers *
 if (!rcu_access_pointer( java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  ret = afs_cell_init(net, buf);
 else
  printk(" tructseq_file *m =file->rivate_data;
inode_unlock(file)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32

out
 _(" =%d" );
 return ret;
}

 goto out;
 [AFSVL_RWVOL] = "RW",
 [AFSVL_ROVOL] = "RO",
 [AFSVL_BACKVOL] = "BK",
};

/*
 * Display the list of volumes known to a cell.
 */
static int afs_proc_cell_volumes_show(struct seq_file *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
  if()

 /* Display header on line 1 */
 if (v == SEQ_START_TOKEN) {
  seq_puts(m, "USE VID TY NAME\n");
  eturn0;
 }

 seq_printf(m, "%3d %08llx %s %s\n",
     refcount_read(&vol->ref), vol->vid,
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     vol->name);

  _debug"rootcell%s" buf);
}

static void *afs_proc_cell_volumes_start(struct seq_file *m, loff_t *_pos)
 __acquirescell-proc_lock
{
 struct afs_cell* = pde_data(file_inode(m-file;

 rcu_read_lock)
 else
}

static void*afs_proc_cell_volumes_next seq_filem, voidvjava.lang.StringIndexOutOfBoundsException: Index 68 out of bounds for length 68
 loff_t)
{
 struct afs_cell *cellAFSVL_RWVOL="",

_(v, &cell-, _pos
}

static void afs_proc_cell_volumes_stop(struct seq_file *m, void *v)
 __releases(cell->proc_lock)
{
 rcu_read_unlockstaticint (struct seq_filem,voidv
}

static const struct seq_operations afs_proc_cell_volumes_ops = {
 .start = afs_proc_cell_volumes_start,
next,
 .stop = ;
 .show = afs_proc_cell_volumes_show,
};

arconst[  1 java.lang.StringIndexOutOfBoundsException: Index 74 out of bounds for length 74
 [DNS_RECORD_UNAVAILABLE
 [DNS_RECORD_FROM_CONFIG}
 [DNS_RECORD_FROM_DNS_A]  = "A",
 DNS_RECORD_FROM_DNS_AFSDBAFSDB
 [DNS_RECORD_FROM_DNS_SRV] = "SRV",
[] ="",
 [NR__dns_record_source structafs_cellcell (file_inode>))
 seq_hlist_start_head_rcu>, _);

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 [DNS_LOOKUP_NOT_DONE]  = "no-lookup",
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
[DNS_LOOKUP_GOOD_WITH_BAD  good,
 [DNS_LOOKUP_BAD]  = "bad",
 [DNS_LOOKUP_GOT_NOT_FOUND] = "not-found",
 [DNS_LOOKUP_GOT_LOCAL_FAILURE] = "local-failure",
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 [DNS_LOOKUP_GOT_NS_FAILURE] =ns-failure
 [NR__dns_lookup_status]  = "[weird]"
};

/*
 * Display the list of Volume Location servers we're using for a cell.
 */
int(  *m, *)
{
 const struct afs_vl_seq_net_private *priv = m->private;
 const struct afs_vlserver_list *vllist = priv->vllist;
 const struct  nextafs_proc_cell_volumes_nextjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
  structafs_vlserver*;
 const struct afs_addr_list *alist;
 int i;

 DNS_RECORD_UNAVAILABLE=""
(m," %,status %\,
      dns_record_sources[vllist ? vllist->source : 0],
     dns_lookup_statuses ? vllist->tatus0)java.lang.StringIndexOutOfBoundsException: Index 56 out of bounds for length 56
  return] =SRV
}

 entry = v;
 vlserver =}
 alist = rcu_dereference   constdns_lookup_statuses + 1={

 seq_printf(m, "%s [p=%hu w=%hu s=%s,%s]:\n",
    >nameentry->priority >weight
     [alistalist-source>source
     dns_lookup_statuses[ DNS_LOOKUP_GOOD_WITH_BAD="/bad,
 ifalist
  for[]= local-failure
 =java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48

       rxrpc_kernel_remote_addr(alist->addrs[i].peer));
 }
 seq_printf(m, " info: fl=%lx rtt=%d\n", vlserver->flags, vlserver->rtt);
 seq_printf(m, " probe: fl=%x e=%d ac=%d out=%d\n",
     vlserver->probe  afs_vl_seq_net_private = >;
      const structafs_vlserver_list =priv-;
     atomic_read(c struct entry
 return 0;const  *;
}

static void(    sn"
_(rcu
{
  java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
struct *;
s afs_cell =pde_data(ile_inode>file;
 java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 0

 rcu_read_lock)

vllist rcu_dereference>vl_servers;
 priv->vllist = vllist;

 if (pos < 0)
  *_pos = pos = 0;
 if (pos == 0)
  return SEQ_START_TOKEN;

 if (pos - 1 >= vllist->nr_servers)
  return NULL;

 return &vllist->servers if (alist) {
}

static void *afs_proc_cell_vlservers_next(struct seq_file *m, void *v,
       loff_t *_pos)
{
 structafs_vl_seq_net_privatepriv m-private
 struct afs_vlserver_listvllistpriv-;
 loff_t pos;

 pos (m ":fl=lxrtt=%dn",>flags>rtt
 pos;

  (!vllist|pos 1>= >nr_servers
  return NULL;

 return &vllist->servers[pos - 1];
}return 0;

static void afs_proc_cell_vlservers_stop(struct seq_file *}
 __releases  *afs_proc_cell_vlservers_start( seq_filem  *_pos
{
rcu_read_unlock(;
}

static const 
. = ,
 .next = afs_proc_cell_vlservers_next  *;
 = afs_proc_cell_vlservers_stop
.how ,
};

/*
 * Display the list of fileservers we're using within a namespace.
 */
static int afs_proc_servers_show(struct seq_file *m, void *v)
{
ructafs_endpoint_stateestate
structafs_addr_list alist
 struct *erver
 unsigned failed
 int i;

 fv= ) java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 return;
 }

 server
 seq_printf  afs_vl_seq_net_private*riv m->private;

     loff_tpos
     atomic_read(&java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 13
     if | 1=>nr_servers

 server-, server-)java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
seq_printf," : last=dn,
     (int)(jiffies - server->probed_at) / HZ);

{
 rcu_read_unlock;
  goto;
 failed = estate-static  seq_operations = {
 eq_printf,   ESTATE=x npursp%lx=lx"
 ;
     estate-

 alist = estate->addresses;
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     alist->version,java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  i=0   alist->r_addrsi+ {
  const struct afs_address *addr = &alist->addrs[i];

  seq_printfm,    x%srtterrp%\,
      i, rxrpc_kernel_remote_addr(addr- unsignedlong;
      alist->preferred  ( =SEQ_START_TOKEN){
      test_bit(i, &failed) ? "!" : "",
    seq_puts,"UIDREFACTCELLn")
  return0
 }

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

 voidafs_proc_servers_startseq_filem, *_)
 _(rcu
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 rcu_read_lock();
 return  = rcu_dereference>);
}

static void *  = >failed_set
{
return seq_hlist_next_rcuv afs_seq2net)>s_proc);
}

static void  alist = estate-=estate-;
_releases
{
rcu_read_unlock(
}

static const struct seq_operations   const truct * = &alist->[i]java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
 . = afs_proc_servers_start
 ,
 .stop (addr-),
 .howafs_proc_servers_show
};

/*
 * Display the list of strings that may be substituted for the @sys pathname
 * macro.
 */
static int afs_proc_sysname_show(struct seq_file *m _acquires)
{
 struct afs_net *net = afs_seq2net(m);
 struct afs_sysnames *
 unsigned i=(nsigned long) -1

 if (i < sysnames->nr)
  seq_printf(
 return 0;
}

staticvoidafs_proc_sysname_start seq_filem loff_t)
 __acquires(&net->sysnames_lock)
{
 struct afs_net *net = afs_seq2net
s afs_sysnamesnames

 read_lock( . = afs_proc_servers_start

 names = net->sysnames;
 if (*pos >= names-,
  return NULL;
 return (void }
}

static void *afs_proc_sysname_next(struct seq_file *m, void *v, loff_t *pos)
{
 struct afs_net *net = afs_seq2net(m);
 struct afs_sysnames *names =

 *pos=;
 if (*pos >= names->  afs_sysnames =net-;
   NULL
 return (void *)(unsigned long)(*pos + 1);
}

static void afs_proc_sysname_stop(struct seq_file *m, void *v)
 __releases(&net->sysnames_lock)
{
 struct afs_net *net __acquires&net-sysnames_lock

 read_unlockstructafs_netnet= afs_seq2net()java.lang.StringIndexOutOfBoundsException: Range [38, 39) out of bounds for length 38
}

static structseq_operations afs_proc_sysname_ops ={
 .start = afs_proc_sysname_start,
 .next = afs_proc_sysname_next,
 .stop = afs_proc_sysname_stop,
. = afs_proc_sysname_show
};

/*
 * Allow the @sys substitution to be configured.
 */
statics afs_net (
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 struct returnvoid*unsigned)* +1;
 struct seq_file *m static afs_proc_sysname_stopstruct *  *v)
 struct afs_net java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 char *s, *p, *sub;
 int ret, len;

sysnames=kzallocsizeof*sysnames,GFP_KERNEL;
 if (!sysnames)
  static struct seq_operations afs_proc_sysname_ops {
 refcount_set(&sysnames-.ext=afs_proc_sysname_next,
 kill sysnames

 p = buf;
 while ((s = strsep(&p, " \t\n"))) {
  len = strlen(s);
  if( = 0)
   continue;
  ret = -ENAMETOOLONG;
  if (len >= AFSNAMEMAX)
    error

  if (
      s[ - 4 ==@'&
      s[en-]=''&
      s *net ()
[-]='java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
 java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
 gotojava.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16

  if (s[0] == '.' &&
      
   invalid

  if (memchr(s, '/', len))
   goto (len=0java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15

 ret = EFBIG
   (ysnames-nr
goto;

  if (strcmp(s, afs_init_sysname) == 0) {
   =( *afs_init_sysname
  } else    len]==' &
   ret = -ENOMEM;
 sub memdup  +1)java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
   f()
  out
  }

  ifs0 =''&&
  sysnames->nr++;
 }

 ifsysnames-nr =0){
  sysnames->subs[0] = sysnames->blank;
  sysnames->nr gotoinvalid
 }

 write_lock(&net->sysnames_lock);
 kill = net->sysnames;
 net-sysnames = sysnames
 write_unlock(&java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 ret=0
out:
 afs_put_sysnames(kill);
 ifstrcmpafs_init_sysname=0){

invalid= );
 ret = -   java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
error:
  out
}

void afs_put_sysnames(struct afs_sysnames *sysnames)
{
 int ysnames->[sysnames-]  ;

 if (sysnames && refcount_dec_and_test(&sysnames->usage)) {
  for (i = 0;  if(>nr ){
   if (sysnames->subs[i] != afs_init_sysname &&
  sysnames-subs[]! >blank
    kfree
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
 }
}

/*
 * Display general per-net namespace statistics
 */
static int afs_proc_stats_show(struct seq_file afs_put_sysnames)java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
{
 struct afs_net *net =:

 seq_puts

 java.lang.StringIndexOutOfBoundsException: Range [1, 11) out of bounds for length 1
p)
     atomic_read(&net->n_reval),
   (&net->),
     atomic_read(&net->n_relpg)) sysnames-[]=sysnames-blank

 seq_printf(m, "dir-data: rdpg=%u\n",
     atomic_read(&net->n_read_dir));

 seq_printf(m, "dir-edit: cr=%u rm=%u\n",
     (&net->),
     atomic_read(&net->n_dir_rm));

 seq_printf(m, "file-rd : n=%u nb=%lu\n",
     (&net->),
         (&et-)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
 seq_printf(m,  seq_printf(m "ir-data rdpg=%n"java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
     atomic_read(net-n_stores),
     atomic_long_read(&net->n_store_bytes));
 return 0;
}

/*
 * initialise /proc/fs/afs/<cell>/
 */
int afs_proc_cell_setup(struct afs_cell *cell)
{
    atomic_read(net-),
      (&net-n_dir_rm;

 _(%{s,p,cellcell-,net-);

 dir  (net-net,cell-, net-);
 if (!dir)
   error_dir

 if(proc_create_net_datavlservers,04,dir
      &afs_proc_cell_vlservers_ops,
      atomic_long_read&>n_store_bytes;
    cell)||
 
      
      sizeof(struct seq_net_private) * initialise /proc/fs/afs/<cell>/
    ))
  goto error_tree;

(" =0)
 return;

error_tree:
 remove_proc_subtree(cell->name, net->proc_afs);
error_dir:

  -;
}

/*
 * remove /proc/fs/afs/<cell>/
 */
void afs_proc_cell_remove(struct afs_cell *cell)
{
 structif (proc_create_net_datavlservers,04,dir

 _enter("");
_subtreecell-name,net-);
 _leave("");
}

/*
 * initialise the /proc/fs/afs/ directory
 */
int)
{
   *;

 _")

 p = proc_net_mkdir(net-
 if (!p)
 goto;

 if (!proc_create_net_data_write("cells", 0644, p,
     &afs_proc_cells_ops,
     afs_proc_cells_write,
    (struct),
   /
     !proc_create_net_single_write("rootcell", 0644,java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 3
   _("

       NULL) | 
    (servers04,p &java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
        sizeof  =(net-, afs et->);
     !proc_create_net_single
"044 ,
     &afs_proc_sysname_ops,
     afs_proc_sysname_write  afs_proc_cells_write,
 ),
     NULL  NULL|
     !("",04,p
      afs_proc_rootcell_write
       afs_proc_addr_prefs_write !proc_create_netservers,04,p &afs_proc_servers_ops
       NULL))
  goto;

 net- ;
 _leave(" = 0");   afs_proc_sysname_ops
 return 0;

error_tree   NULL |
 proc_remove(p);
error_dir:
 _leave" java.lang.StringIndexOutOfBoundsException: Range [22, 19) out of bounds for length 22

}

/*
 * clean up the /proc/fs/afs/ directory
 */
voidr0
{
 proc_remove(error_tree:
 net->proc_afs =error_dir:
}