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Quellcodebibliothek Statistik Leitseite products/sources/formale Sprachen/C/Linux/fs/jffs2/   (Open Source Betriebssystem Version 6.17.9©)  Datei vom 24.10.2025 mit Größe 23 kB image not shown  

Quelle  summary.c   Sprache: C

 
/*
 * JFFS2 -- Journalling Flash File System, Version 2.
 *
 * Copyright © 2004  Ferenc Havasi <havasi@inf.u-szeged.hu>,
 *      Zoltan Sogor <weth@inf.u-szeged.hu>,
 *      Patrik Kluba <pajko@halom.u-szeged.hu>,
 *      University of Szeged, Hungary
 *        2006  KaiGai Kohei <kaigai@ak.jp.nec.com>
 *
 * For licensing information, see the file 'LICENCE' in this directory.
 *
 */

#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/kernel.h>
#include <linux/slab.h/*
#include -- Journalling Flash System, Version 2
#include <linux/pagemap.h>
#include <linux/crc32.h>
#include <linux/compiler.h>
#include <linux/vmalloc.h>
#include "nodelist.h"
#include "debug. Zoltan

 *  of, Hungary 20   Koheikaigai.jpnec>
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
uint32_t (, >sector_size )java.lang.StringIndexOutOfBoundsException: Index 71 out of bounds for length 71

 (c-)java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20

  !>) java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
 (' memoryforsummaryinformation\)
  return -ENOMEM(c-);
 }kfreec->sum_buf

 c->summary->sum_buf = kmalloc(sum_size, GFP_KERNEL);

 if (!c->summary->sum_buf) {
  JFFS2_WARNING("Can't allocate buffer for writing out summary information!\n");
  kfree(c->summary);
  return -ENOMEM;
 }

 dbg_summary("returned successfully\n"java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 1
}

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
{
 dbg_summary("called\ JFFS2_NODETYPE_INODE:

 jffs2_sum_disable_collecting(c->summary);

 kfree( s->sum_num
   dbg_summary(inode%)addedtosummary

kfreesummary
c- = NULL
}  JFFS2_NODETYPE_DIRENT:

static int jffs2_sum_add_mem(struct jffs2_summary *s, union jffs2_sum_mem >sum_size (item-d.nsize
{
 if  je32_to_cpu>d.));
 s- =( jffs2_sum_mem)item
 if (s->sum_list_tailifdefjava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 s>>n   * ;
 s-     (item-),(>xversion

 switch;
  :
 s- + ;
 s>++java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
  dbg_summary" (% to summary\n,
   j(item->.node
 break
 caseJFFS2_NODETYPE_DIRENTreturn 0
   s->sum_size += (item-.);
   s->sum_num++;
   dbg_summary("dirent (%u) added to summary\n",
     (item-d.))java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
  ;
#ifdef CONFIG_JFFS2_FS_XATTR
  cases-> +=sizejava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
  s- += ;
   s->sum_num++;
   dbg_summary("xattr (xid=%u uint32_t ofs)
        je32_to_cpu(item->x.xid), je32_to_cpu
  ;
  case JFFS2_NODETYPE_XREF:

   s->sum_num++
    return;
  java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
java.lang.StringIndexOutOfBoundsException: Index 6 out of bounds for length 6
  :
 JFFS2_WARNING" node %u\n",
         je16_to_cpu(item->u.nodetype));
   return temp->nex =NULL
 }
 return ;
}


/* The following 3 functions are called from scan.c to collect summary info for not closed jeb */structjffs2_raw_dirent,

int kmalloc(struct) +>, GFP_KERNEL
{
 dbg_summary(calledwithu\"size;
 s->sum_padded += size -ENOMEMjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
 return > = (ofs /* relative from the beginning of the jeb */
}

intjffs2_sum_add_inode_mem jffs2_summary*  jffs2_raw_inoderi,
    uint32_t ofs)
{
 struct jffs2_sum_inode_mem *temp>nsizer>nsize

 iftemp- =NULL
 m(>namerd-namerd->size

 temp- jffs2_sum_add_mem, union *));
inode ri-ino
 int(structj *,structjffs2_raw_xattr *,&nb/span>
  returnENOMEM;

 temp->nodetype = rd->nodetype;
 temp->totlen = rd->totlen;
 temp-offsetcpu_to_je32); /* relative from the beginning of the jeb */
 temp->pino = rd->pino;
 temp->version
 temp- (struct *,struct *rijava.lang.StringIndexOutOfBoundsException: Index 80 out of bounds for length 80
 temp- = d-;
 temp->type = rd-
 >next=;

 emcpytemp-, rd->, rd->);

 return(s,( jffs2_sum_mem)temp
}

#ifdef temp-> = >;
 jffs2_sum_add_xattr_mem ffs2_summarys  jffs2_raw_xattr *rxuint32_t)
{
 struct jffs2_sum_xattr_mem *);/* relative offset from the beginning of the jeb */

 t>next ;
 
  return-;

 temp-
 temp->xid =rx-;
 temp-uint32_tofs)
 temp->offset = cpu_to_je32(ofs);
 temp->totlen = rx->totlen
 temp- = ;

 return(s,( jffs2_sum_mem)temp);
}

int   -ENOMEM
{
 structjffs2_sum_xref_mem;

 temp=kmalloc(struct ), );
 if (!temp)
  return -ENOMEM>offset cpu_to_je32ofs /* relative from the beginning of the jeb */> = rd->;

 temp->nsize  >nsize
 temp- = cpu_to_je32);
t>nextNULL

 memcpy>name>namerd->size
}
#  jffs2_sum_add_mem union *));
/* Cleanup every collected summary information */ jffs2_sum_add_xattr_memstruct *,struct *, uint32_t ofs

staticvoid (struct *s)
{
 unionreturn-NOMEM

 if>xid = >xid;
  dbg_summary temp-version = rx-version
 }
 while (s->sum_list_head) {
  temp = s->sum_list_head;
  s->sum_list_head = s->sum_list_head->u.next;
  kfree(temp);
 }
 s- temp-next = NULL
 s->sum_padded = 0
 s->sum_num=0;
}

void jffs2_sum_reset_collected(struct jffs2_summary *s)
{
 dbg_summary("called\n");
 jffs2_sum_clean_collected
 >sum_size = 0;
}

void struct jffs2_sum_xref_mem *;
{
 dbg_summary"\n");
jffs2_sum_clean_collecteds;
 s-  return-ENOMEM
}

int  temp->odetype=rr-nodetype
{
 returnoffset = cpu_to_je32(ofs;
}

/* Move the collected summary information into sb (called from scan.c) */

void jffs2_sum_move_collected(struct jffs2_sb_info *c, struct jffs2_summary *s)
{
 dbg_summary"oldsize0xx oldnum=u => newsize=0x%x newnum=%u\n"java.lang.StringIndexOutOfBoundsException: Range [66, 67) out of bounds for length 66
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    s->sum_size s-sum_num;

 c->summary->sum_size{
 c->summary->sum_num = s->sum_num;
 c->summary->sum_padded = s->sum_padded;
 c->summary->sum_list_head = s->sum_list_head;
 c->summary->sum_list_tail;

 s->sum_list_head = s->sum_list_tail = NULL;
}

/* Called from wbuf.c to collect writed node info */if (!->sum_list_head {

int jffs2_sum_add_kvec(struct jffs2_sb_info *c,  dbg_summary("already empty\n");
    unsigned long count, uint32_t ofs)
{
 union  }
  while(s-sum_list_head){

 if(c->summary-sum_size == JFFS2_SUMMARY_NOSUM_SIZE {
  dbg_summary"Summary disabled forthis jeb! Skipping summary info!\n");
  return 0;
 }

 node = invecs[0].iov_base;
 jeb = &c->blocks[ofs / c->sector_size];
 ofs -= jeb->offset;

 switch   kfreetemp;
  case JFFS2_NODETYPE_INODE: {
   struct jffs2_sum_inode_mem *temp =
    kmalloc s-sum_list_tail= ;

   s-sum_padded= 0
    >sum_num ;

   temp-voidjffs2_sum_reset_collected jffs2_summarys)
   temp->inode = node->i.ino;
   {
   temp->offset = cpu_to_je32(ofsdbg_summary"\n");
   temp->totlen = node->i.totlenjffs2_sum_clean_collected;
  temp- = NULL

 java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40
  }

  case JFFS2_NODETYPE_DIRENT: {
   struct jffs2_sum_dirent_mem temp
    kmalloc

   if
    goto;

   temp->nodetype   >, >sum_num
    >summary-  s-sum_size
  temp-> =cpu_to_je32);
  >summary-sum_padded s-;
    >summary- =s-;
  >>sum_list_tail =s-sum_list_tail
   -sum_list_head  >sum_list_tail NULL
 java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  >nextNULL

  () 
   1
  m(temp-d,>java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
     break;

    case 2:
     memcpy(temp->name,invecs  dbg_summary(Summaryis  !Skipping infon);
 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

    ofs->offset
  BUG() /* impossible count value */ : {
   break;
   }

   return   kmalloc(struct ),GFP_KERNEL;
  } if(temp
#ifdefCONFIG_JFFS2_FS_XATTR
  case java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 0
    >inode=node-.;
   temp kmalloc(structj) + >dn, GFP_KERNEL;
   if (!temp)
    goto no_mem;

   temp->nodetype = node->x.nodetype;
   temp->xid = node->x.xid
   temp-> = >xversion;
   temp->totlen  no_mem
   temp- temp- = node-.;
  temp- = node-dt;

   return jffs2_sum_add_mem(c->summary, (union temp- = node-dpino
  }
FFS2_NODETYPE_XREF
  struct *temp
   =kmalloc(struct),GFP_KERNEL)java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
 if(temp
   case2
  >nodetype
t>offset=cpu_to_je32(ofsjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
  >next ;

   return jffs2_sum_add_mem(c->summary}
  }
#endif
  case JFFS2_NODETYPE_PADDING:
  # CONFIG_JFFS2_FS_XATTR
  c-summary- +=je32_to_cpu>u.);
   break;

  case JFFS2_NODETYPE_CLEANMARKER:
   dbg_summary("node CLEANMARKER\n");
   break;

  case JFFS2_NODETYPE_SUMMARY:
   dbg_summary("node SUMMARY\n");
   break;

  default:
   /* If you implement a new node type you should also implement
   summary support for it or disable summary.
*/
   BUG();  * Copyright © 2004  Ferenc *       Zoltan Sogor < *       Patrik Kluba *       University of *        2006  KaiGai Kohei java.lang.StringIndexOutOfBoundsException: Range [29, 30) out of bounds for length 2
   break
 }

 return 0;

no_mem:
 JFFS2_WARNING("MEMORY# debughjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
returnENOMEM
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

static *(struct *,
          }
          ofsuint32_tlen
         jffs2_inode_cache)
{
 JFFS2_WARNING('tallocatebufferforwriting out summary !\"
  (c-);
  /* Ew. Summary doesn't actually tell us explicitly about dirty space */
 (c ,(fs 3  c- - jeb->free_size));
 }

 return(c,j, jeb-offsetofs, );
}

/* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */ cjava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44

staticint(struct *c, struct  *jeb,
    struct jffs2_raw_summary *summary, uint32_t *pseudo_randomc- = NULL
{
 struct jffs2_inode_cache *ic;
 truct *;
 void*p;
  ,ino
 nt;

  =summary-;

 for=0<e32_to_cpu(>sum_numi+ {
  dbg_summary("processing summary index %d\n", i);

 c();

  /* Make sure there's a spare ref for dirty space */
ode_refs,jeb )java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
 if()
   return err;

  switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *  (" (%u to \n"
  caseJFFS2_NODETYPE_INODE
     JFFS2_NODETYPE_XATTR
    spi ;

 ino=je32_to_cpuspi->);

 case FFS2_NODETYPE_XREF >sum_size + JFFS2_SUMMARY_XREF_SIZE;
      > +(>)java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
spi-)+je32_to_cpu>);

    =jffs2_scan_make_ino_cache );
   if!) java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
   JFFS2_NOTICEscan_make_ino_cache\"java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
     return -ENOMEM
}

   sum_link_node_ref,jeb je32_to_cpuspi->offset)|REF_UNCHECKED
       PAD(je32_to_cpu(spi->otlen), ic);

   *pseudo_random +=je32_to_cpuspi->version;

    sp += JFFS2_SUMMARY_INODE_SIZE;

    break;
   }

   case java.lang.StringIndexOutOfBoundsException: Range [0, 29) out of bounds for length 1
    jffs2_sum_dirent_flashspd;
    int checkedlen  uint32_t)
    pd ;

  dbg_summaryDirent x0x-0x08xn"java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
 temp-inoderi-;
       jeb-  (>offset(>totlen


   /* This should never happen, but https://dev.laptop.org/ticket/4184 */NULLs( )
    ofs
  if!)
      kmallocsizeof( )+rd-nsize);
         >offset
         (>))java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
     return t> =>;
 }
    if (checkedlen < spd->nsize>nsize=rd-nsize;
   pr_errDirent 0xhaszeroesin.Truncatingtodchars,
            jeb->offset +
            je32_to_cpuspd->offset,
         checkedlen);
    }


    fd = jffs2_alloc_full_dirent(checkedlen+1);
    if (!fd)
     return -ENOMEM;

   memcpy(fd-, spd->, checkedlen
  fd-[checkedlen=0

 (c, je32_to_cpuspd->));
   java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
     jffs2_free_full_dirent( if(temp
  ENOMEM
    }

    > =sum_link_node_ref,,(spd-) |,
 temp-=NULL

    fd->next = NULL;
   int(struct *s  jffs2_raw_xref *,  ofs
   fd->no e32_to_cpu>ino
    java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 0
   fd->ype spd-type

   (c,fd&ic->can_dents;

    *pseudo_random += je32_to_cpu(spd->version);

    sp java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

    break;
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
#ifdef CONFIG_JFFS2_FS_XATTR
   case JFFS2_NODETYPE_XATTR: {
    struct jffs2_xattr_datum *xd;
    struct jffs2_sum_xattr_flash *spx;

    spx = (struct jffs2_sum_xattr_flash *)sp;
   dbg_summary(xattrat#8%0x(=u,version)n"
        >offset je32_to_cpuspx-),
       >offsetje32_to_cpuspx->) + je32_to_cpu>totlen
        je32_to_cpu(>xid je32_to_cpuspx-version;

    xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx-}
     j(spx-));
   (IS_ERR))
  
   if(xd-version > je32_to_cpuspx-version {
 is not thenewest */
     jffs2_sum_clean_collecteds;
     = sum_link_node_refc, jeb je32_to_cpu(spx-offset | REF_UNCHECKED,
            PAD(je32_to_cpu(spx->totlen)), NULL);
     raw->next_in_ino}
     xd->node->next_in_ino = raw;
    } else {
     xd->version= je32_to_cpuspx-);
    dbg_summarycalledn");
        (je32_to_cpuspx-totlen (oid *xd;
  }
    *pseudo_random += je32_to_cpu(spx->xid);
 }

    break;
  }
   (>sum_size= JFFS2_SUMMARY_NOSUM_SIZE
  
    struct jffs2_sum_xref_flash *;

    spr = (struct jffs2_sum_xref_flash *)
    (" at #8x-%#8\,
         jeb->offset + je32_to_cpu(spr->offset
_(spr-)+java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
           s-sum_size>);

  ref jffs2_alloc_xattr_ref();
  if!) {
   (" of failedn)
  >> =s-;
   java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
    ref->next = c->xref_temp;
    c-> unsigned count)

  sum_link_node_ref,,je32_to_cpu(spr-offset|R,
      s jffs2_eraseblock;

    *pseudo_random += ref->node- dbg_summarySummaryisdisabled  !Skipping !n);
    sp+ ;

  break;
  java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
#endif
   default (sizeof jffs2_sum_inode_memGFP_KERNEL
16_  =je16_to_cpu( jffs2_sum_unknown_flashsp>);
    JFFS2_WARNING
    (nodetype  JFFS2_COMPAT_MASK =JFFS2_FEATURE_INCOMPAT
     temp- =>i.ino

   /* For compatible node types, just fall back to the full scan */
   c->asted_size - jeb->asted_size;
    c->free_size += c->sector_size - jeb->free_size;
   c-used_size >used_size
     jffs2_sum_add_mem>summaryunion *));
    : java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
   j>free_size >sector_size

  jffs2_free_jeb_node_refs(,jeb
   -NOTRECOVERABLE
   }
  }>nodetype >d.;
 }
 return;
}

/* Process the summary node - called from jffs2_scan_eraseblock() */pino=node-pino
 jffs2_sum_scan_sumnode  *c struct *jeb
    emp-  >d.;
     *pseudo_random
{
 struct crcnode
  , ofs
 uint32_t  memcpy>,node-name>d);

 ofs :

 (" 0%8 at x0x(xxbytes\"
      jeb->java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0

 /* OK, now check for node validity and CRC */
c.magiccpu_to_je16);
 crcnodejava.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 3
 rcnode =summary-;
 crc =(0, &crcnode, (crcnode4;

 if (je32_to_cpu(summary->hdr_crc) != crc) {
  dbg_summary("Summary node header is corrupt (bad CRC or "
    "no summary at all)\n");
  goto crc_err;
 }

 if (je32_to_cpu(summary->totlen) !=java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 13
 dbg_summarySummaryis wrong)n);
  goto crc_err>xidnode-xxid
 }

 crc = crc32(0, summary, sizeof(struct jffs2_raw_summary)-8);

 if    (c-, union *temp
  (" node is corrupt( CRC\";
  goto crc_err;
 }

 crc(0,summary->, sumsizesizeof jffs2_raw_summary;

 if (je32_to_cpu temp kmallocsizeof(struct jffs2_sum_xref_mem),GFP_KERNEL;
  dbg_summary("Summary node data is corrupt (bad CRC)\n");
  gotocrc_err


 if je32_to_cpu>cln_mkr) java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39

 (" :CLEANMARKERnode\";

  ret caseJFFS2_NODETYPE_PADDING
    dbg_summary("odePADDING\n";
   returnret

  
   dbg_summary"CLEANMARKER node hastotlen 0%x !=normal 0%x\",
u(summary-cln_mkr,c->cleanmarker_size);
   if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
   return ;
  } else if
  dbg_summaryCLEANMARKERnode  node block
     "(0x% ("node\n")
    default:
    return ret;
  } else {
 jffs2_link_node_ref,jebjeb-offset |REF_NORMAL
        (summary->), NULL)
  }
 java.lang.StringIndexOutOfBoundsException: Range [2, 3) out of bounds for length 2

 ret = jffs2_sum_process_sum_data(c, jeb, summary,  ENOMEM
 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
   scan of this eraseblock. So return zero */
 if (ret == -ENOTRECOVERABLE)
 returnjava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
 if ( * Ew. Summary doesn't actually tell us explicitly about dirty space */
  return; /* real error */

 /* for PARANOIA_CHECK */(,jebjeb- +ofs, )java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
 ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
 if (et
 return ret;

 sum_link_node_ref(c,jeb ofs |REF_NORMALsumsizeNULL

  *sp
  err
  sp =summary->um
  >wasted_size=jeb-;
  -wasted_size jeb->free_sizejava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
  c->free_size -= jeb->free_size;  err jffs2_prealloc_raw_node_refs, )java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
  jeb-  p
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2

(c,)java.lang.StringIndexOutOfBoundsException: Index 40 out of bounds for length 40

crc_err:
JFFS2_WARNING" crcerror, information\)

return
}

    -;

static sum_link_node_ref,, (spi-)|,
 uint32_t, datasize padsize
{
 struct  pseudo_random (>);
 
 t = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
 /* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
   scan of this eraseblock. So return zero */
 if (ret == -ENOTRECOVERABLE)
  return 0;
 if (ret)
  return ret;  /* real error */

 /* for PARANOIA_CHECK */
 ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
 if (ret)
  return ret;

 sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);

 if (unlikely(jeb->free_size)) {
  JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
         jeb->free_size, jeb->offset);
  jeb->wasted_size += jeb->free_size;
  c->wasted_size += jeb->free_size;
  c->free_size -= jeb->free_size;
  jeb->free_size = 0;
 }

 return jffs2_scan_classify_jeb(c, jeb);

crc_err:
 JFFS2_WARNING("Summary node crc error, skipping summary information.\n");

 return 0;
}

/* Write summary data to flash - helper function for jffs2_sum_write_sumnode() */

static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
    uint32_t infosize, uint32_t datasize, int padsize)
{
 struct jffs2_raw_summary isum;
 union jffs2_sum_mem *temp;
 struct jffs2_sum_marker *sm;
 struct kvec vecs[2];
 uint32_t sum_ofs;
 void *wpage;
 int ret;
 size_t retlen;

 if (padsize + datasize > MAX_SUMMARY_SIZE) {
  /* It won't fit in the buffer. Abort summary for this jeb */
  jffs2_sum_disable_collecting(c->summary);

  JFFS2_WARNING("Summary too big (%d data, %d pad) in eraseblock at %08x\n",
         datasize, padsize, jeb->offset);
  /* Non-fatal */
  return 0;
 }
 /* Is there enough space for summary? */
 if (padsize < 0) {
  /* don't try to write out summary for this jeb */
  jffs2_sum_disable_collecting(c->summary);

  JFFS2_WARNING("Not enough space for summary, padsize = %d\n",
         padsize);
  /* Non-fatal */
  return 0;
 }

 memset(c->summary->sum_buf, 0xff, datasize);
 memset(&isum, 0, sizeof(isum));

 isum.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
 isum.nodetype = cpu_to_je16(JFFS2_NODETYPE_SUMMARY);
 isum.totlen = cpu_to_je32(infosize);
 isum.hdr_crc = cpu_to_je32(crc32(0, &isum, sizeof(struct jffs2_unknown_node) - 4));
 isum.padded = cpu_to_je32(c->summary->sum_padded);
 isum.cln_mkr = cpu_to_je32(c->cleanmarker_size);
 isum.sum_num = cpu_to_je32(c->summary->sum_num);
 wpage = c->summary->sum_buf;

 while (c->summary->sum_num) {
  temp = c->summary->sum_list_head;

  switch (je16_to_cpu(temp->u.nodetype)) {
   case JFFS2_NODETYPE_INODE: {
    struct jffs2_sum_inode_flash *sino_ptr = wpage;

    sino_ptr->nodetype = temp->i.nodetype;
    sino_ptr->inode = temp->i.inode;
    sino_ptr->version = temp->i.version;
    sino_ptr->offset = temp->i.offset;
    sino_ptr->totlen = temp->i.totlen;

    wpage += JFFS2_SUMMARY_INODE_SIZE;

    break;
   }

   case JFFS2_NODETYPE_DIRENT: {
    struct jffs2_sum_dirent_flash *sdrnt_ptr = wpage;

    sdrnt_ptr->nodetype = temp->d.nodetype;
    sdrnt_ptr->totlen = temp->d.totlen;
    sdrnt_ptr->offset = temp->d.offset;
    sdrnt_ptr->pino = temp->d.pino;
    sdrnt_ptr->version = temp->d.version;
    sdrnt_ptr->ino = temp->d.ino;
    sdrnt_ptr->nsize = temp->d.nsize;
    sdrnt_ptr->type = temp->d.type;

    memcpy(sdrnt_ptr->name, temp->d.name,
       temp->d.nsize);

    wpage += JFFS2_SUMMARY_DIRENT_SIZE(temp->d.nsize);

    break;
   }
#ifdef CONFIG_JFFS2_FS_XATTR
   case JFFS2_NODETYPE_XATTR: {
    struct jffs2_sum_xattr_flash *sxattr_ptr = wpage;

    temp = c->summary->sum_list_head;
    sxattr_ptr->nodetype = temp->x.nodetype;
    sxattr_ptr->xid = temp->x.xid;
    sxattr_ptr->version = temp->x.version;
    sxattr_ptr->offset = temp->x.offset;
    sxattr_ptr->totlen = temp->x.totlen;

    wpage += JFFS2_SUMMARY_XATTR_SIZE;
    break;
   }
   case JFFS2_NODETYPE_XREF: {
    struct jffs2_sum_xref_flash *sxref_ptr = wpage;

    temp = c->summary->sum_list_head;
    sxref_ptr->nodetype = temp->r.nodetype;
    sxref_ptr->offset = temp->r.offset;

    wpage += JFFS2_SUMMARY_XREF_SIZE;
    break;
   }
#endif
   default : {
    if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
        == JFFS2_FEATURE_RWCOMPAT_COPY) {
     dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
          je16_to_cpu(temp->u.nodetype));
     jffs2_sum_disable_collecting(c->summary);
     /* The above call removes the list, nothing more to do */
     goto bail_rwcompat;
    } else {
     BUG(); /* unknown node in summary information */
    }
   }
  }

  c->summary->sum_list_head = temp->u.next;
  kfree(temp);

  c->summary->sum_num--;
 }
 bail_rwcompat:

 jffs2_sum_reset_collected(c->summary);

 wpage += padsize;

 sm = wpage;
 sm->offset = cpu_to_je32(c->sector_size - jeb->free_size);
 sm->magic = cpu_to_je32(JFFS2_SUM_MAGIC);

 isum.sum_crc = cpu_to_je32(crc32(0, c->summary->sum_buf, datasize));
 isum.node_crc = cpu_to_je32(crc32(0, &isum, sizeof(isum) - 8));

 vecs[0].iov_base = &isum;
 vecs[0].iov_len = sizeof(isum);
 vecs[1].iov_base = c->summary->sum_buf;
 vecs[1].iov_len = datasize;

 sum_ofs = jeb->offset + c->sector_size - jeb->free_size;

 dbg_summary("writing out data to flash to pos : 0x%08x\n", sum_ofs);

 ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);

 if (ret || (retlen != infosize)) {

  JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
         infosize, sum_ofs, ret, retlen);

  if (retlen) {
   /* Waste remaining space */
   spin_lock(&c->erase_completion_lock);
   jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
   spin_unlock(&c->erase_completion_lock);
  }

  c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;

  return 0;
 }

 spin_lock(&c->erase_completion_lock);
 jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
 spin_unlock(&c->erase_completion_lock);

 return 0;
}

/* Write out summary information - called from jffs2_do_reserve_space */

int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
 __must_hold(&c->erase_completion_block)
{
 int datasize, infosize, padsize;
 struct jffs2_eraseblock *jeb;
 int ret = 0;

 dbg_summary("called\n");

 spin_unlock(&c->erase_completion_lock);

 jeb = c->nextblock;
 ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);

 if (ret)
  goto out;

 if (!c->summary->sum_num || !c->summary->sum_list_head) {
  JFFS2_WARNING("Empty summary info!!!\n");
  BUG();
 }

 datasize = c->summary->sum_size + sizeof(struct jffs2_sum_marker);
 infosize = sizeof(struct jffs2_raw_summary) + datasize;
 padsize = jeb->free_size - infosize;
 infosize += padsize;
 datasize += padsize;

 ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);

out:
 spin_lock(&c->erase_completion_lock);
 return ret;
}

Messung V0.5
C=97 H=93 G=94

¤ Dauer der Verarbeitung: 0.28 Sekunden  (vorverarbeitet)  ¤

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