/* OS2store_dir_ufs.cpp */
/*
 * $Id: store_dir_ufs.c,v 1.49 2002/09/01 15:16:36 hno Exp $
 */
#include "squid.h"

#include "store_ufs.h"
// * DEBUG: section 47    Store Directory Routines
#ifdef _SQUID_OS2VAC_

  #define INCL_DOSFILEMGR   /* File Manager values */
  #define INCL_DOSERRORS    /* DOS error values */
  #include <os2.h>
  #include <stdio.h>

   #include <direct.h>

#define DefaultLevelOneDirs     16
#define DefaultLevelTwoDirs     256
#define STORE_META_BUFSZ 4096

//struct direct
//{
//  int            d_reclen;              /* Almost not used           */
//  ino_t          d_ino;                 /* Almost not used           */
//  int            d_namlen;              /* Length of d_name          */
//  char           d_name[FILENAME_MAX];  /* File name, 0 terminated   */
//  long           d_size;                /* File size (bytes)         */
//  unsigned short d_attr;                /* OS file attributes        */
//  unsigned short d_time;                /* OS file modification time */
//  unsigned short d_date;                /* OS file modification date */
//};

// Level 1 (32-bit) information (used without EAs).
//
// typedef struct _FILEFINDBUF3 {
//   ULONG     oNextEntryOffset;         /*  Offset of next entry. */
//   FDATE     fdateCreation;            /*  Date of file creation. */
//   FTIME     ftimeCreation;            /*  Time of file creation. */
//   FDATE     fdateLastAccess;          /*  Date of last access. */
//   FTIME     ftimeLastAccess;          /*  Time of last access. */
//   FDATE     fdateLastWrite;           /*  Date of last write. */
//   FTIME     ftimeLastWrite;           /*  Time of last write. */
//   ULONG     cbFile;                   /*  Size of file. */
//   ULONG     cbFileAlloc;              /*  Allocation size. */
//   ULONG     attrFile;                 /*  File attributes. */
//   UCHAR     cchName;
//   CHAR      achName[CCHMAXPATHCOMP];  /*  File name including null terminator. */
// } FILEFINDBUF3;
// typedef FILEFINDBUF3 *PFILEFINDBUF3;


struct _dircontents
{
  char *                _d_entry;
  long                  _d_size;
  unsigned short        _d_attr;
  unsigned short        _d_time;
  unsigned short        _d_date;
  struct _dircontents * _d_next;
};

struct dir_ent
{  char d_name[FILENAME_MAX]; /* File name, 0 terminated   */
};

struct _dirdesc
{
  int                   dd_id;
  long                  dd_loc;
  struct _dircontents * dd_contents;
  struct _dircontents * dd_cp;
  struct dir_ent       d_ent;
  HDIR          hdirFindHandle;
  FILEFINDBUF3  FindBuffer;      /* Returned from FindFirst/Next */
  int last_rc;                   /* last rc code */
};

typedef struct _dirdesc DIR;

/* External functions */
char * GetOS2ErrorMessage(int ierr);

/* Internal functions */
DIR *opendir(char *name);
int closedir(DIR *dirp);
struct dir_ent *readdir(DIR *dirp);
// look I:\EMX\libsrc\emx\gnu\libg++-2.8.1.1a\libg++\genclass\dirent.c



typedef struct _RebuildState RebuildState;
struct _RebuildState {
    SwapDir *sd;
    int n_read;
    FILE *log;
    int speed;
    int curlvl1;
    int curlvl2;
    struct {
       unsigned int need_to_validate:1;
       unsigned int clean:1;
       unsigned int init:1;
    } flags;
    int done;
    int in_dir;
    int fn;
    struct dir_ent *entry;
    DIR *td;
    char fullpath[SQUID_MAXPATHLEN];
    char fullfilename[SQUID_MAXPATHLEN];
    struct _store_rebuild_data counts;
};

static int n_ufs_dirs = 0;
static int *ufs_dir_index = NULL;
MemPool *ufs_state_pool = NULL;
static int ufs_initialised = 0;

static char *storeUfsDirSwapSubDir(SwapDir *, int subdirn);
static int storeUfsDirCreateDirectory(const char *path, int);
static int storeUfsDirVerifyCacheDirs(SwapDir *);
static int storeUfsDirVerifyDirectory(const char *path);
static void storeUfsDirCreateSwapSubDirs(SwapDir *);
static char *storeUfsDirSwapLogFile(SwapDir *, const char *);
static EVH storeUfsDirRebuildFromDirectory;
static EVH storeUfsDirRebuildFromSwapLog;
static int storeUfsDirGetNextFile(RebuildState *, sfileno *, int *size);
static StoreEntry *storeUfsDirAddDiskRestore(SwapDir * SD, const cache_key * key,
    int file_number,
    size_t swap_file_sz,
    time_t expires,
    time_t timestamp,
    time_t lastref,
    time_t lastmod,
    u_num32 refcount,
    u_int16_t flags,
    int clean);
static void storeUfsDirRebuild(SwapDir * sd);
static void storeUfsDirCloseTmpSwapLog(SwapDir * sd);
static FILE *storeUfsDirOpenTmpSwapLog(SwapDir *, int *, int *);
static STLOGOPEN storeUfsDirOpenSwapLog;
static STINIT storeUfsDirInit;
static STFREE storeUfsDirFree;
static STLOGCLEANSTART storeUfsDirWriteCleanStart;
static STLOGCLEANNEXTENTRY storeUfsDirCleanLogNextEntry;
static STLOGCLEANWRITE storeUfsDirWriteCleanEntry;
static STLOGCLEANDONE storeUfsDirWriteCleanDone;
static STLOGCLOSE storeUfsDirCloseSwapLog;
static STLOGWRITE storeUfsDirSwapLog;
static STNEWFS storeUfsDirNewfs;
static STDUMP storeUfsDirDump;
static STMAINTAINFS storeUfsDirMaintain;
static STCHECKOBJ storeUfsDirCheckObj;
static STREFOBJ storeUfsDirRefObj;
static STUNREFOBJ storeUfsDirUnrefObj;

static int _Optlink rev_int_sort(const void *A, const void *B);

static int storeUfsDirClean(int swap_index);
static EVH storeUfsDirCleanEvent;
static int storeUfsDirIs(SwapDir * sd);
static int storeUfsFilenoBelongsHere(int fn, int F0, int F1, int F2);
static int storeUfsCleanupDoubleCheck(SwapDir *, StoreEntry *);
static void storeUfsDirStats(SwapDir *, StoreEntry *);
static void storeUfsDirInitBitmap(SwapDir *);
static int storeUfsDirValidFileno(SwapDir *, sfileno, int);

STSETUP storeFsSetup_ufs;
/**************************************************/

struct dir_ent *readdir(DIR *dirp)
{  int    rc;
   ULONG  ulResultBufLen = sizeof(FILEFINDBUF3);
   ULONG  ulFindCount    = 1;        /* Look for 1 file at a time    */

   if(dirp->last_rc == ERROR_NO_MORE_FILES)
            return NULL;

/* Keep finding the next file until there are no more files */
//     while (rc != ERROR_NO_MORE_FILES) {

    rc = DosFindNext(dirp->hdirFindHandle,      /* Directory handle             */
                     &dirp->FindBuffer,         /* Result buffer                */
                     ulResultBufLen,      /* Result buffer length         */
                     &ulFindCount);       /* Number of entries to find    */

    if (rc != NO_ERROR && rc != ERROR_NO_MORE_FILES)
    {   debug(47, 0) ("readdir:WARNING: rc =%d, %s\n", rc, GetOS2ErrorMessage(rc));
        return NULL;
    } else if(rc ==  ERROR_NO_MORE_FILES) {
         dirp->last_rc = rc;
         return NULL;
    }
    strcpy(dirp->d_ent.d_name,dirp->FindBuffer.achName);
//     } /* endwhile */
   dirp->last_rc = rc;

   return &(dirp->d_ent);
}

int closedir(DIR *dirp)
{  int rc;

//     rc = DosFindClose(hdirFindHandle);    /* Close our directory handle */
//     if (rc != NO_ERROR) {
//        printf("DosFindClose error: return code = %u\n",rc);
//        return 1;
//     }
   if(dirp)
   {   rc = DosFindClose(dirp->hdirFindHandle);    /* Close our directory handle */
       xfree((void *)dirp);
       if (rc != NO_ERROR)
          return 1;
   }
   return 0;
}
//  #define INCL_DOSFILEMGR   /* File Manager values */
//  #define INCL_DOSERRORS    /* DOS error values */
//  #include <os2.h>
//  #include <stdio.h>

DIR *opendir(char *name)
{
     HDIR          hdirFindHandle = HDIR_CREATE;
     FILEFINDBUF3  FindBuffer     = {0};      /* Returned from FindFirst/Next */
     ULONG         ulResultBufLen = sizeof(FILEFINDBUF3);
     ULONG         ulFindCount    = 1;        /* Look for 1 file at a time    */
     APIRET        rc             = NO_ERROR; /* Return code                  */
     char fname[FILENAME_MAX];
     int l,i, *ptmp;
     DIR *pdir;

     strcpy(fname,name);
     strcat(fname,"/*.*");
     rc = DosFindFirst( fname,                /* File pattern - all files     */
                        &hdirFindHandle,      /* Directory search handle      */
             FILE_DIRECTORY|FILE_NORMAL,      /* Search attribute             */
                        &FindBuffer,          /* Result buffer                */
                        ulResultBufLen,       /* Result buffer length         */
                        &ulFindCount,         /* Number of entries to find    */
                        FIL_STANDARD);        /* Return Level 1 file info     */
    if(rc != NO_ERROR)
    {   int dl=0;
        if(rc == ERROR_FILE_NOT_FOUND || rc == ERROR_PATH_NOT_FOUND) dl = 1;
        debug(47, dl) ("opendir:WARNING: rc =%d, %s\n", rc, GetOS2ErrorMessage(rc));
        return NULL;
    }

     i = sizeof(DIR);

     pdir = (DIR *) xcalloc(i,1);
     pdir->hdirFindHandle = hdirFindHandle;
     pdir->FindBuffer = FindBuffer;
     pdir->last_rc = rc;

     return pdir;
}

/**************************************************/
/*
 * These functions were ripped straight out of the heart of store_dir.c.
 * They assume that the given filenum is on a ufs partiton, which may or
 * may not be true..
 * XXX this evilness should be tidied up at a later date!
 */

static int
storeUfsDirMapBitTest(SwapDir * SD, sfileno filn)
{
    ufsinfo_t *ufsinfo;
    ufsinfo = (ufsinfo_t *) SD->fsdata;
    return file_map_bit_test(ufsinfo->map, filn);
}

static void
storeUfsDirMapBitSet(SwapDir * SD, int fn)
{
    sfileno filn = fn;
    ufsinfo_t *ufsinfo;
    ufsinfo = (ufsinfo_t *) SD->fsdata;
    file_map_bit_set(ufsinfo->map, filn);
}

void
storeUfsDirMapBitReset(SwapDir * SD, int fn)
{
    sfileno filn = fn;
    ufsinfo_t *ufsinfo;
    ufsinfo = (ufsinfo_t *) SD->fsdata;
    /*
     * We have to test the bit before calling file_map_bit_reset.
     * file_map_bit_reset doesn't do bounds checking.  It assumes
     * filn is a valid file number, but it might not be because
     * the map is dynamic in size.  Also clearing an already clear
     * bit puts the map counter of-of-whack.
     */
    if (file_map_bit_test(ufsinfo->map, filn))
       file_map_bit_reset(ufsinfo->map, filn);
}

int
storeUfsDirMapBitAllocate(SwapDir * SD)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) SD->fsdata;
    int fn;
    fn = file_map_allocate(ufsinfo->map, ufsinfo->suggest);
    file_map_bit_set(ufsinfo->map, fn);
    ufsinfo->suggest = fn + 1;
    return fn;
}

/*
 * Initialise the ufs bitmap
 *
 * If there already is a bitmap, and the numobjects is larger than currently
 * configured, we allocate a new bitmap and 'grow' the old one into it.
 */
static void
storeUfsDirInitBitmap(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;

    if (ufsinfo->map == NULL) {
       /* First time */
       ufsinfo->map = file_map_create();
    } else if (ufsinfo->map->max_n_files) {
       /* it grew, need to expand */
       /* XXX We don't need it anymore .. */
    }
    /* else it shrunk, and we leave the old one in place */
}

static char *
storeUfsDirSwapSubDir(SwapDir * sd, int subdirn)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;

    LOCAL_ARRAY(char, fullfilename, SQUID_MAXPATHLEN);
    assert(0 <= subdirn && subdirn < ufsinfo->l1);
//  snprintf(fullfilename, SQUID_MAXPATHLEN, "%s/%02X", sd->path, subdirn); UNIX-like
    snprintf(fullfilename, SQUID_MAXPATHLEN, "%s\\%02X", sd->path, subdirn);
    return fullfilename;
}

static int
storeUfsDirCreateDirectory(const char *path, int should_exist)
{
    int created = 0, rc;
    struct stat st;
    getCurrentTime();

    rc = stat(path, &st);
    if (0 == rc) {
       if (S_ISDIR(st.st_mode)) {
           debug(47, should_exist ? 3 : 1) ("%s exists\n", path);
       } else {
           fatalf("Swap directory %s not exist or is not a directory.", path);
       }
#ifdef _SQUID_OS2VAC_
    } else
       if (0 == mkdir((char*)path)) {
#else
    } else if (0 == mkdir(path, 0755)) {
#endif
       debug(47, should_exist ? 1 : 3) ("%s created\n", path);
       created = 1;
    } else {
       fatalf("Failed to make swap directory %s: %s",
           path, xstdio_strerror());
    }
    return created;
}

static int
storeUfsDirVerifyDirectory(const char *path)
{
    struct stat sb;
    if (stat(path, &sb) < 0) {
       debug(47, 0) ("%s: %s\n", path, xstdio_strerror());
       return -1;
    }
    if (S_ISDIR(sb.st_mode) == 0) {
       debug(47, 0) ("%s is not a directory\n", path);
       return -1;
    }
    return 0;
}

/*
 * This function is called by storeUfsDirInit().  If this returns < 0,
 * then Squid exits, complains about swap directories not
 * existing, and instructs the admin to run 'squid -z'
 */
static int
storeUfsDirVerifyCacheDirs(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    int j;
    const char *path = sd->path;

    if (storeUfsDirVerifyDirectory(path) < 0)
       return -1;
    for (j = 0; j < ufsinfo->l1; j++) {
       path = storeUfsDirSwapSubDir(sd, j);
       if (storeUfsDirVerifyDirectory(path) < 0)
       {   debug(47, 0) ("storeUfsDirVerifyCacheDirs:WARNING: directory %s not found\n", path);
           return -1;
       }
    }
    return 0;
}

static void
storeUfsDirCreateSwapSubDirs(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    int i, k;
    int should_exist;
    LOCAL_ARRAY(char, name, MAXPATHLEN);
    for (i = 0; i < ufsinfo->l1; i++) {
//     snprintf(name, MAXPATHLEN, "%s/%02X", sd->path, i);
       snprintf(name, MAXPATHLEN, "%s\\%02X", sd->path, i);
       if (storeUfsDirCreateDirectory(name, 0))
           should_exist = 0;
       else
           should_exist = 1;
       debug(47, 1) ("Making directories in %s\n", name);
       for (k = 0; k < ufsinfo->l2; k++) {
//         snprintf(name, MAXPATHLEN, "%s/%02X/%02X", sd->path, i, k);
           snprintf(name, MAXPATHLEN, "%s\\%02X\\%02X", sd->path, i, k);
           storeUfsDirCreateDirectory(name, should_exist);
       }
    }
}

static char *
storeUfsDirSwapLogFile(SwapDir * sd, const char *ext)
{
    LOCAL_ARRAY(char, path, SQUID_MAXPATHLEN);
    LOCAL_ARRAY(char, pathtmp, SQUID_MAXPATHLEN);
    LOCAL_ARRAY(char, digit, 32);
    char *pathtmp2;
    if (Config.Log.swap) {
       xstrncpy(pathtmp, sd->path, SQUID_MAXPATHLEN - 64);
       pathtmp2 = pathtmp;
       while ((pathtmp2 = strchr(pathtmp2, '/')) != NULL)
           *pathtmp2 = '.';
       while (strlen(pathtmp) && pathtmp[strlen(pathtmp) - 1] == '.')
           pathtmp[strlen(pathtmp) - 1] = '\0';
       for (pathtmp2 = pathtmp; *pathtmp2 == '.'; pathtmp2++);
       snprintf(path, SQUID_MAXPATHLEN - 64, Config.Log.swap, pathtmp2);
       if (strncmp(path, Config.Log.swap, SQUID_MAXPATHLEN - 64) == 0) {
           strcat(path, ".");
           snprintf(digit, 32, "%02d", sd->index);
           strncat(path, digit, 3);
       }
    } else {
       xstrncpy(path, sd->path, SQUID_MAXPATHLEN - 64);
       strcat(path, "/swap.state");
    }
    if (ext)
       strncat(path, ext, 16);
    return path;
}

static void
storeUfsDirOpenSwapLog(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    char *path;
    int fd;
    path = storeUfsDirSwapLogFile(sd, NULL);
    fd = file_open(path, O_WRONLY | O_CREAT | O_BINARY);
    if (fd < 0) {
       debug(50, 1) ("%s: %s\n", path, xstdio_strerror());
       fatal("storeUfsDirOpenSwapLog: Failed to open swap log.");
    }
    debug(50, 3) ("Cache Dir #%d log opened on FD %d\n", sd->index, fd);
    ufsinfo->swaplog_fd = fd;
    if (0 == n_ufs_dirs)
       assert(NULL == ufs_dir_index);
    n_ufs_dirs++;
    assert(n_ufs_dirs <= Config.cacheSwap.n_configured);
}

static void
storeUfsDirCloseSwapLog(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    if (ufsinfo->swaplog_fd < 0)       /* not open */
       return;
    file_close(ufsinfo->swaplog_fd);
    debug(47, 3) ("Cache Dir #%d log closed on FD %d\n",
       sd->index, ufsinfo->swaplog_fd);
    ufsinfo->swaplog_fd = -1;
    n_ufs_dirs--;
    assert(n_ufs_dirs >= 0);
    if (0 == n_ufs_dirs)
       safe_free(ufs_dir_index);
}

static void
storeUfsDirInit(SwapDir * sd)
{
    static int started_clean_event = 0;
    static const char *errmsg =
    "\tFailed to verify one of the swap directories, Check cache.log\n"
    "\tfor details.  Run 'squid -z' to create swap directories\n"
    "\tif needed, or if running Squid for the first time.";
    storeUfsDirInitBitmap(sd);
    if (storeUfsDirVerifyCacheDirs(sd) < 0)
       fatal(errmsg);
    storeUfsDirOpenSwapLog(sd);
    storeUfsDirRebuild(sd);
    if (!started_clean_event) {
       eventAdd("storeDirClean", storeUfsDirCleanEvent, NULL, 15.0, 1);
       started_clean_event = 1;
    }
    (void) storeDirGetBlkSize(sd->path, &sd->fs.blksize);
}

static void
storeUfsDirRebuildFromDirectory(void *data)
{
    RebuildState *rb = (RebuildState *)data;
    SwapDir *SD = rb->sd;
    LOCAL_ARRAY(char, hdr_buf, SM_PAGE_SIZE);
    StoreEntry *e = NULL;
    StoreEntry tmpe;
    cache_key key[MD5_DIGEST_CHARS];
    sfileno filn = 0;
    int count,rc;
    int size,fh;
    struct stat sb;
    int swap_hdr_len;
    int fd = -1;
    tlv *tlv_list;
    tlv *t;
    assert(rb != NULL);
    debug(47, 3) ("storeUfsDirRebuildFromDirectory: DIR #%d\n", rb->sd->index);
/* EK */
//if(rb->speed > 0)
//     rb->speed = 500000;

    for (count = 0; count < rb->speed; count++) {
       assert(fd == -1);
       fd = storeUfsDirGetNextFile(rb, &filn, &size);
       if (fd == -2) {
           debug(47, 1) ("Done scanning %s swaplog (%d entries)\n",
               rb->sd->path, rb->n_read);
           store_dirs_rebuilding--;
           storeUfsDirCloseTmpSwapLog(rb->sd);
           storeRebuildComplete(&rb->counts);
           cbdataFree(rb, RebuildState);
           return;
       } else if (fd < 0) {
           continue;
       }
       assert(fd > -1);
       fh = squid_fd_table.fd_table[fd].GetFileHandle();
       /* lets get file stats here */
       if (fstat(fh, &sb) < 0) {
           debug(47, 1) ("storeUfsDirRebuildFromDirectory: fstat(FD %d(%d)): %s\n",
               fd, fh,xstdio_strerror());
           file_close(fd);
           store_open_disk_fd--;
           fd = -1;
           continue;
       }
       if ((++rb->counts.scancount & 0xFFFF) == 0)
           debug(47, 3) ("  %s %7d files opened so far.\n",
               rb->sd->path, rb->counts.scancount);
       store_dirs_rebuild_progress++;
       debug(47, 9) ("file_in: fd=%d %08X\n", fd, filn);
       if (sb.st_size)
       {    statCounter.syscalls.disk.reads++;
            rc = squid_fd_table.fd_table[fd].read(hdr_buf, SM_PAGE_SIZE);
           if (rc < 0)
           {  debug(47, 1) ("storeUfsDirRebuildFromDirectory: read(FD %d): %s\n",
                              fd, xstdio_strerror());
              file_close(fd);
              store_open_disk_fd--;
              fd = -1;
              continue;
            }
       }
       file_close(fd);
       store_open_disk_fd--;
       fd = -1;
       swap_hdr_len = 0;
#if USE_TRUNCATE
       if (sb.st_size == 0)
           continue;
#endif
       tlv_list = storeSwapMetaUnpack(hdr_buf, &swap_hdr_len);
       if (tlv_list == NULL) {
           debug(47, 1) ("storeUfsDirRebuildFromDirectory: failed to get meta data\n");
           /* XXX shouldn't this be a call to storeUfsUnlink ? */
           storeUfsDirUnlinkFile(SD, filn);
           continue;
       }
       debug(47, 3) ("storeUfsDirRebuildFromDirectory: successful swap meta unpacking\n");
       memset(key, '\0', MD5_DIGEST_CHARS);
       memset(&tmpe, '\0', sizeof(StoreEntry));
       for (t = tlv_list; t; t = t->next) {
           switch (t->type) {
           case STORE_META_KEY:
               assert(t->length == MD5_DIGEST_CHARS);
               xmemcpy(key, t->value, MD5_DIGEST_CHARS);
               break;
           case STORE_META_STD:
               assert(t->length == STORE_HDR_METASIZE);
               xmemcpy(&tmpe.timestamp, t->value, STORE_HDR_METASIZE);
               break;
           default:
               break;
           }
       }
       storeSwapTLVFree(tlv_list);
       tlv_list = NULL;
       if (storeKeyNull(key)) {
           debug(47, 1) ("storeUfsDirRebuildFromDirectory: NULL key\n");
           storeUfsDirUnlinkFile(SD, filn);
           continue;
       }
       tmpe.hash.key = key;
       /* check sizes */
       if (tmpe.swap_file_sz == 0) {
           tmpe.swap_file_sz = sb.st_size;

       } else if (tmpe.swap_file_sz == sb.st_size - swap_hdr_len) {
           tmpe.swap_file_sz = sb.st_size;
       } else if (tmpe.swap_file_sz != sb.st_size) {
           debug(47, 1) ("storeUfsDirRebuildFromDirectory: SIZE MISMATCH %ld!=%ld\n",
               (long int) tmpe.swap_file_sz, (long int) sb.st_size);
           storeUfsDirUnlinkFile(SD, filn);
           continue;
       }
       if (EBIT_TEST(tmpe.flags, KEY_PRIVATE)) {
           storeUfsDirUnlinkFile(SD, filn);
           rb->counts.badflags++;
           continue;
       }
       e = storeGet(key);
       if (e && e->lastref >= tmpe.lastref) {
           /* key already exists, current entry is newer */
           /* keep old, ignore new */
           rb->counts.dupcount++;
           continue;
       } else if (NULL != e) {
           /* URL already exists, this swapfile not being used */
           /* junk old, load new */
           storeRelease(e);    /* release old entry */
           rb->counts.dupcount++;
       }

       rb->counts.objcount++;
       storeEntryDump(&tmpe, 5);
       e = storeUfsDirAddDiskRestore(SD, key,
           filn,
           tmpe.swap_file_sz,
           tmpe.expires,
           tmpe.timestamp,
           tmpe.lastref,
           tmpe.lastmod,
           tmpe.refcount,      /* refcount */
           tmpe.flags,         /* flags */
           (int) rb->flags.clean);
       storeDirSwapLog(e, SWAP_LOG_ADD);
    }
    eventAdd("storeRebuild", storeUfsDirRebuildFromDirectory, rb, 0.0, 1);
}

static void
storeUfsDirRebuildFromSwapLog(void *data)
{
    RebuildState *rb = (RebuildState *)data;
    SwapDir *SD = rb->sd;
    StoreEntry *e = NULL;
    storeSwapLogData s;
    size_t ss = sizeof(storeSwapLogData);
    int count;
    int used;                  /* is swapfile already in use? */
    int disk_entry_newer;      /* is the log entry newer than current entry? */
    double x;
    assert(rb != NULL);

    /* load a number of objects per invocation */
    for (count = 0; count < rb->speed; count++) {
       if (fread(&s, ss, 1, rb->log) != 1) {
           debug(47, 1) ("Done reading %s swaplog (%d entries)\n",
               rb->sd->path, rb->n_read);
           fclose(rb->log);
           rb->log = NULL;
           store_dirs_rebuilding--;
           storeUfsDirCloseTmpSwapLog(rb->sd);
           storeRebuildComplete(&rb->counts);
           cbdataFree(rb,RebuildState);
           return;
       }
       rb->n_read++;
       if (s.op <= SWAP_LOG_NOP)
           continue;
       if (s.op >= SWAP_LOG_MAX)
           continue;
       /*
        * BC: during 2.4 development, we changed the way swap file
        * numbers are assigned and stored.  The high 16 bits used
        * to encode the SD index number.  There used to be a call
        * to storeDirProperFileno here that re-assigned the index
        * bits.  Now, for backwards compatibility, we just need
        * to mask it off.
        */
       s.swap_filen &= 0x00FFFFFF;
       debug(47, 3) ("storeUfsDirRebuildFromSwapLog: %s %s %08X\n",
           swap_log_op_str[(int) s.op],
           storeKeyText(s.key),
           s.swap_filen);
       if (s.op == SWAP_LOG_ADD) {
           (void) 0;
       } else if (s.op == SWAP_LOG_DEL) {
           if ((e = storeGet(s.key)) != NULL) {
               /*
                * Make sure we don't unlink the file, it might be
                * in use by a subsequent entry.  Also note that
                * we don't have to subtract from store_swap_size
                * because adding to store_swap_size happens in
                * the cleanup procedure.
                */
               storeExpireNow(e);
               storeReleaseRequest(e);
               if (e->swap_filen > -1) {
                   storeUfsDirReplRemove(e);
                   storeUfsDirMapBitReset(SD, e->swap_filen);
                   e->swap_filen = -1;
                   e->swap_dirn = -1;
               }
               storeRelease(e);
               rb->counts.objcount--;
               rb->counts.cancelcount++;
           }
           continue;
       } else {
           x = log(++rb->counts.bad_log_op) / log(10.0);
           if (0.0 == x - (double) (int) x)
               debug(47, 1) ("WARNING: %d invalid swap log entries found\n",
                   rb->counts.bad_log_op);
           rb->counts.invalid++;
           continue;
       }
       if ((++rb->counts.scancount & 0xFFF) == 0) {
           struct stat sb;
           if (0 == fstat(fileno(rb->log), &sb))
               storeRebuildProgress(SD->index,
                   (int) sb.st_size / ss, rb->n_read);
       }
       store_dirs_rebuild_progress++;

       if (!storeUfsDirValidFileno(SD, s.swap_filen, 0)) {
           rb->counts.invalid++;
           continue;
       }
       if (EBIT_TEST(s.flags, KEY_PRIVATE)) {
           rb->counts.badflags++;
           continue;
       }
       e = storeGet(s.key);
       used = storeUfsDirMapBitTest(SD, s.swap_filen);
       /* If this URL already exists in the cache, does the swap log
        * appear to have a newer entry?  Compare 'lastref' from the
        * swap log to e->lastref. */
       disk_entry_newer = e ? (s.lastref > e->lastref ? 1 : 0) : 0;
       if (used && !disk_entry_newer) {
           /* log entry is old, ignore it */
           rb->counts.clashcount++;
           continue;
       } else if (used && e && e->swap_filen == s.swap_filen && e->swap_dirn == SD->index) {
           /* swapfile taken, same URL, newer, update meta */
           if (e->store_status == STORE_OK) {
               e->lastref = s.timestamp;
               e->timestamp = s.timestamp;
               e->expires = s.expires;
               e->lastmod = s.lastmod;
               e->flags = s.flags;
               e->refcount += s.refcount;
               storeUfsDirUnrefObj(SD, e);
           } else {
               debug_trap("storeUfsDirRebuildFromSwapLog: bad condition");
               debug(47, 1) ("\tSee %s:%d\n", __FILE__, __LINE__);
           }
           continue;
       } else if (used) {
           /* swapfile in use, not by this URL, log entry is newer */
           /* This is sorta bad: the log entry should NOT be newer at this
            * point.  If the log is dirty, the filesize check should have
            * caught this.  If the log is clean, there should never be a
            * newer entry. */
           debug(47, 1) ("WARNING: newer swaplog entry for dirno %d, fileno %08X\n",
               SD->index, s.swap_filen);
           /* I'm tempted to remove the swapfile here just to be safe,
            * but there is a bad race condition in the NOVM version if
            * the swapfile has recently been opened for writing, but
            * not yet opened for reading.  Because we can't map
            * swapfiles back to StoreEntrys, we don't know the state
            * of the entry using that file.  */
           /* We'll assume the existing entry is valid, probably because
            * were in a slow rebuild and the the swap file number got taken
            * and the validation procedure hasn't run. */
           assert(rb->flags.need_to_validate);
           rb->counts.clashcount++;
           continue;
       } else if (e && !disk_entry_newer) {
           /* key already exists, current entry is newer */
           /* keep old, ignore new */
           rb->counts.dupcount++;
           continue;
       } else if (e) {
           /* key already exists, this swapfile not being used */
           /* junk old, load new */
           storeExpireNow(e);
           storeReleaseRequest(e);
           if (e->swap_filen > -1) {
               storeUfsDirReplRemove(e);
               /* Make sure we don't actually unlink the file */
               storeUfsDirMapBitReset(SD, e->swap_filen);
               e->swap_filen = -1;
               e->swap_dirn = -1;
           }
           storeRelease(e);
           rb->counts.dupcount++;
       } else {
           /* URL doesnt exist, swapfile not in use */
           /* load new */
           (void) 0;
       }
       /* update store_swap_size */
       rb->counts.objcount++;
       e = storeUfsDirAddDiskRestore(SD, s.key,
           s.swap_filen,
           s.swap_file_sz,
           s.expires,
           s.timestamp,
           s.lastref,
           s.lastmod,
           s.refcount,
           s.flags,
           (int) rb->flags.clean);
       storeDirSwapLog(e, SWAP_LOG_ADD);
    }
    eventAdd("storeRebuild", storeUfsDirRebuildFromSwapLog, rb, 0.0, 1);
}

static int
storeUfsDirGetNextFile(RebuildState * rb, sfileno * filn_p, int *size)
{
    SwapDir *SD = rb->sd;
    ufsinfo_t *ufsinfo = (ufsinfo_t *) SD->fsdata;
    int fd = -1;
    int used = 0;
    int dirs_opened = 0;
    debug(47, 3) ("storeUfsDirGetNextFile: flag=%d, %d: /%02X/%02X\n",
       rb->flags.init,
       rb->sd->index,
       rb->curlvl1, rb->curlvl2);
    if (rb->done)
       return -2;
    while (fd < 0 && rb->done == 0) {
       fd = -1;
       if (0 == rb->flags.init) {      /* initialize, open first file */
           rb->done = 0;
           rb->curlvl1 = 0;
           rb->curlvl2 = 0;
           rb->in_dir = 0;
           rb->flags.init = 1;
           assert(Config.cacheSwap.n_configured > 0);
       }
       if (0 == rb->in_dir) {  /* we need to read in a new directory */
//         snprintf(rb->fullpath, SQUID_MAXPATHLEN, "%s/%02X/%02X",
           snprintf(rb->fullpath, SQUID_MAXPATHLEN, "%s\\%02X\\%02X",
               rb->sd->path,
               rb->curlvl1,
               rb->curlvl2);
           if (rb->flags.init && rb->td != NULL)
               closedir(rb->td);
           rb->td = NULL;
           if (dirs_opened)
               return -1;
           rb->td = opendir(rb->fullpath);
           dirs_opened++;
           if (rb->td == NULL) {
               debug(47, 1) ("storeUfsDirGetNextFile: opendir: %s: %s\n",
                   rb->fullpath, xstdio_strerror());
           } else {
 /* skip . - OS2 directory have no "." entry, it is rather synonym for "" */
              /* rb->entry = readdir(rb->td);   */
               rb->entry = readdir(rb->td); /* and .. */ 
               if (rb->entry == NULL && errno == ENOENT)
                   debug(47, 1) ("storeUfsDirGetNextFile: directory does not exist!.\n");
               debug(47, 3) ("storeUfsDirGetNextFile: Directory %s\n", rb->fullpath);
           }
       }
       if (rb->td != NULL && (rb->entry = readdir(rb->td)) != NULL) {
           rb->in_dir++;
           if (sscanf(rb->entry->d_name, "%x", &rb->fn) != 1) {
               debug(47, 3) ("storeUfsDirGetNextFile: invalid %s\n",
                   rb->entry->d_name);
               continue;
           }
           if (!storeUfsFilenoBelongsHere(rb->fn, rb->sd->index, rb->curlvl1, rb->curlvl2)) {
               debug(47, 3) ("storeUfsDirGetNextFile: %08X does not belong in %d/%d/%d\n",
                   rb->fn, rb->sd->index, rb->curlvl1, rb->curlvl2);
               continue;
           }
           used = storeUfsDirMapBitTest(SD, rb->fn);
           if (used) {
               debug(47, 3) ("storeUfsDirGetNextFile: Locked, continuing with next.\n");
               continue;
           }
//         snprintf(rb->fullfilename, SQUID_MAXPATHLEN, "%s/%s",
           snprintf(rb->fullfilename, SQUID_MAXPATHLEN, "%s\\%s",
               rb->fullpath, rb->entry->d_name);
           debug(47, 3) ("storeUfsDirGetNextFile: Opening %s\n", rb->fullfilename);
           fd = file_open(rb->fullfilename, O_RDONLY | O_BINARY);
           if (fd < 0)
               debug(47, 1) ("storeUfsDirGetNextFile: %s: %s\n", rb->fullfilename, xstdio_strerror());
           else
               store_open_disk_fd++;
           continue;
       }
       if (rb->td != NULL)
           closedir(rb->td);
       rb->td = NULL;
       rb->in_dir = 0;
       if (++rb->curlvl2 < ufsinfo->l2)
           continue;
       rb->curlvl2 = 0;
       if (++rb->curlvl1 < ufsinfo->l1)
           continue;
       rb->curlvl1 = 0;
       rb->done = 1;
    }
    *filn_p = rb->fn;
    return fd;
}

/* Add a new object to the cache with empty memory copy and pointer to disk
 * use to rebuild store from disk. */
static StoreEntry *
storeUfsDirAddDiskRestore(SwapDir * SD, const cache_key * key,
    int file_number,
    size_t swap_file_sz,
    time_t expires,
    time_t timestamp,
    time_t lastref,
    time_t lastmod,
    u_num32 refcount,
    u_int16_t flags,
    int clean)
{
    StoreEntry *e = NULL;
    debug(47, 5) ("storeUfsAddDiskRestore: %s, fileno=%08X\n", storeKeyText(key), file_number);
    /* if you call this you'd better be sure file_number is not
     * already in use! */
    e = new_StoreEntry(STORE_ENTRY_WITHOUT_MEMOBJ, NULL, NULL);
    e->store_status = STORE_OK;
    storeSetMemStatus(e, NOT_IN_MEMORY);
    e->swap_status = SWAPOUT_DONE;
    e->swap_filen = file_number;
    e->swap_dirn = SD->index;
    e->swap_file_sz = swap_file_sz;
    e->lock_count = 0;
    e->lastref = lastref;
    e->timestamp = timestamp;
    e->expires = expires;
    e->lastmod = lastmod;
    e->refcount = refcount;
    e->flags = flags;
    EBIT_SET(e->flags, ENTRY_CACHABLE);
    EBIT_CLR(e->flags, RELEASE_REQUEST);
    EBIT_CLR(e->flags, KEY_PRIVATE);
    e->ping_status = PING_NONE;
    EBIT_CLR(e->flags, ENTRY_VALIDATED);
    storeUfsDirMapBitSet(SD, e->swap_filen);
    storeHashInsert(e, key);   /* do it after we clear KEY_PRIVATE */
    storeUfsDirReplAdd(SD, e);
    return e;
}

CBDATA_TYPE(RebuildState);
static void
storeUfsDirRebuild(SwapDir * sd)
{
    RebuildState *rb;
    int clean = 0;
    int zero = 0;
    FILE *fp;
    EVH *func = NULL;
    CBDATA_INIT_TYPE(RebuildState);
    rb = cbdataAlloc(RebuildState);
    rb->sd = sd;
    rb->speed = opt_foreground_rebuild ? 1 << 30 : 150;
    /*
     * If the swap.state file exists in the cache_dir, then
     * we'll use storeUfsDirRebuildFromSwapLog(), otherwise we'll
     * use storeUfsDirRebuildFromDirectory() to open up each file
     * and suck in the meta data.
     */
    fp = storeUfsDirOpenTmpSwapLog(sd, &clean, &zero);
    if (fp == NULL || zero) {
       if (fp != NULL)
           fclose(fp);
       func = storeUfsDirRebuildFromDirectory;
    } else {
       func = storeUfsDirRebuildFromSwapLog;
       rb->log = fp;
       rb->flags.clean = (unsigned int) clean;
    }
    if (!clean)
       rb->flags.need_to_validate = 1;
    debug(47, 1) ("Rebuilding storage in %s (%s)\n",
       sd->path, clean ? "CLEAN" : "DIRTY");
    store_dirs_rebuilding++;
    eventAdd("storeRebuild", func, rb, 0.0, 1);
}

static void
storeUfsDirCloseTmpSwapLog(SwapDir * sd)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    char *swaplog_path = xstrdup(storeUfsDirSwapLogFile(sd, NULL));
    char *new_path = xstrdup(storeUfsDirSwapLogFile(sd, ".new"));
    int fd;
    file_close(ufsinfo->swaplog_fd);
#if defined(_SQUID_OS2_) || defined(_SQUID_CYGWIN_) || defined(_SQUID_MSWIN_)
    if (unlink(swaplog_path) < 0) {
       debug(50, 0) ("%s: %s\n", swaplog_path, xstdio_strerror());
       fatal("storeUfsDirCloseTmpSwapLog: unlink failed");
    }
#endif
    if (xrename(new_path, swaplog_path) < 0) {
       fatal("storeUfsDirCloseTmpSwapLog: rename failed");
    }
    fd = file_open(swaplog_path, O_WRONLY | O_CREAT | O_BINARY);
    if (fd < 0) {
       debug(50, 1) ("%s: %s\n", swaplog_path, xstdio_strerror());
       fatal("storeUfsDirCloseTmpSwapLog: Failed to open swap log.");
    }
    safe_free(swaplog_path);
    safe_free(new_path);
    ufsinfo->swaplog_fd = fd;
    debug(47, 3) ("Cache Dir #%d log opened on FD %d\n", sd->index, fd);
}

static FILE *
storeUfsDirOpenTmpSwapLog(SwapDir * sd, int *clean_flag, int *zero_flag)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    char *swaplog_path = xstrdup(storeUfsDirSwapLogFile(sd, NULL));
    char *clean_path = xstrdup(storeUfsDirSwapLogFile(sd, ".last-clean"));
    char *new_path = xstrdup(storeUfsDirSwapLogFile(sd, ".new"));
    struct stat log_sb;
    struct stat clean_sb;
    FILE *fp;
    int fd;
    if (stat(swaplog_path, &log_sb) < 0) {
       debug(47, 1) ("Cache Dir #%d: No log file\n", sd->index);
       safe_free(swaplog_path);
       safe_free(clean_path);
       safe_free(new_path);
       return NULL;
    }
    *zero_flag = log_sb.st_size == 0 ? 1 : 0;
    /* close the existing write-only FD */
    if (ufsinfo->swaplog_fd >= 0)
       file_close(ufsinfo->swaplog_fd);
    /* open a write-only FD for the new log */
    fd = file_open(new_path, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY);
    if (fd < 0) {
       debug(50, 1) ("%s: %s\n", new_path, xstdio_strerror());
       fatal("storeDirOpenTmpSwapLog: Failed to open swap log.");
    }
    ufsinfo->swaplog_fd = fd;
    /* open a read-only stream of the old log */
    fp = fopen(swaplog_path, "rb"); /* бля!!! rb rb rb rb */
    if (fp == NULL) {
       debug(50, 0) ("%s: %s\n", swaplog_path, xstdio_strerror());
       fatal("Failed to open swap log for reading");
    }
    memset(&clean_sb, '\0', sizeof(struct stat));
    if (stat(clean_path, &clean_sb) < 0)
       *clean_flag = 0;
    else if (clean_sb.st_mtime < log_sb.st_mtime)
       *clean_flag = 0;
    else
       *clean_flag = 1;
    safeunlink(clean_path, 1);
    safe_free(swaplog_path);
    safe_free(clean_path);
    safe_free(new_path);
    return fp;
}

struct _clean_state {
    char *cur;
    char *ne_w;
    char *cln;
    char *outbuf;
    off_t outbuf_offset;
    int fd;
    RemovalPolicyWalker *walker;
};

#define CLEAN_BUF_SZ 16384
/*
 * Begin the process to write clean cache state.  For UFS this means
 * opening some log files and allocating write buffers.  Return 0 if
 * we succeed, and assign the 'func' and 'data' return pointers.
 */
static int
storeUfsDirWriteCleanStart(SwapDir * sd)
{
    struct _clean_state *state = (struct _clean_state *)xcalloc(1, sizeof(struct _clean_state));
#if HAVE_FCHMOD
    struct stat sb;
#endif
    sd->log.clean.write = NULL;
    sd->log.clean.state = NULL;
    state->ne_w = xstrdup(storeUfsDirSwapLogFile(sd, ".clean"));
    state->fd = file_open(state->ne_w, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY);
    if (state->fd < 0) {
       xfree(state->ne_w);
       xfree(state);
       return -1;
    }
    state->cur = xstrdup(storeUfsDirSwapLogFile(sd, NULL));
    state->cln = xstrdup(storeUfsDirSwapLogFile(sd, ".last-clean"));
    state->outbuf = (char *)xcalloc(CLEAN_BUF_SZ, 1);
    state->outbuf_offset = 0;
    state->walker = sd->repl->WalkInit(sd->repl);
    unlink(state->cln);
    debug(47, 3) ("storeDirWriteCleanLogs: opened %s, FD %d\n",
       state->ne_w, state->fd);
#if HAVE_FCHMOD
    if (stat(state->cur, &sb) == 0)
       fchmod(state->fd, sb.st_mode);
#endif
    sd->log.clean.write = storeUfsDirWriteCleanEntry;
    sd->log.clean.state = state;
    return 0;
}

/*
 * Get the next entry that is a candidate for clean log writing
 */
const StoreEntry *
storeUfsDirCleanLogNextEntry(SwapDir * sd)
{
    const StoreEntry *entry = NULL;
    struct _clean_state *state = (struct _clean_state *)sd->log.clean.state;
    if (state->walker)
       entry = state->walker->Next(state->walker);
    return entry;
}

/*
 * "write" an entry to the clean log file.
 */
static void
storeUfsDirWriteCleanEntry(SwapDir * sd, const StoreEntry * e)
{
    storeSwapLogData s;
    static size_t ss = sizeof(storeSwapLogData);
    struct _clean_state *state = (struct _clean_state *)sd->log.clean.state;
    int rc;
    memset(&s, '\0', ss);
    s.op = (char) SWAP_LOG_ADD;
    s.swap_filen = e->swap_filen;
    s.timestamp = e->timestamp;
    s.lastref = e->lastref;
    s.expires = e->expires;
    s.lastmod = e->lastmod;
    s.swap_file_sz = e->swap_file_sz;
    s.refcount = e->refcount;
    s.flags = e->flags;
    xmemcpy(&s.key, e->hash.key, MD5_DIGEST_CHARS);
    xmemcpy(state->outbuf + state->outbuf_offset, &s, ss);
    state->outbuf_offset += ss;
    /* buffered write */
    if (state->outbuf_offset + ss > CLEAN_BUF_SZ) {
//       if (write(state->fd, state->outbuf, state->outbuf_offset) < 0) {
         rc = squid_fd_table.fd_table[state->fd].write(state->outbuf, state->outbuf_offset);
         if( rc < 0) {
           debug(50, 0) ("storeDirWriteCleanLogs: %s: write: %s\n",
               state->ne_w, xstdio_strerror());
           debug(50, 0) ("storeDirWriteCleanLogs: Current swap logfile not replaced.\n");
           file_close(state->fd);
           state->fd = -1;
           unlink(state->ne_w);
           safe_free(state);
           sd->log.clean.state = NULL;
           sd->log.clean.write = NULL;
           return;
       }
       state->outbuf_offset = 0;
    }
}

static void
storeUfsDirWriteCleanDone(SwapDir * sd)
{
    int fd,rc;
    struct _clean_state *state = (struct _clean_state *)sd->log.clean.state;
    if (NULL == state)
       return;
    if (state->fd < 0)
       return;
    state->walker->Done(state->walker);
//  if (write(state->fd, state->outbuf, state->outbuf_offset) < 0) {
    rc = squid_fd_table.fd_table[state->fd].write(state->outbuf, state->outbuf_offset);
    if(rc < 0)
    {  debug(50, 0) ("storeDirWriteCleanLogs: %s: write: %s\n",
           state->ne_w, xstdio_strerror());
       debug(50, 0) ("storeDirWriteCleanLogs: Current swap logfile "
           "not replaced.\n");
       file_close(state->fd);
       state->fd = -1;
       unlink(state->ne_w);
    }
    safe_free(state->outbuf);
    /*
     * You can't rename open files on Microsoft "operating systems"
     * so we have to close before renaming.
     */
    storeUfsDirCloseSwapLog(sd);
    /* save the fd value for a later test */
    fd = state->fd;
    /* rename */
    if (state->fd >= 0) {
#if defined(_SQUID_OS2_) || defined(_SQUID_CYGWIN_) || defined(_SQUID_MSWIN_)
       file_close(state->fd);
       state->fd = -1;
       if (unlink(state->cur) < 0)
           debug(50, 0) ("storeDirWriteCleanLogs: unlinkd failed: %s, %s\n",
               xstdio_strerror(), state->cur);
#endif
       xrename(state->ne_w, state->cur);
    }
    /* touch a timestamp file if we're not still validating */
    if (store_dirs_rebuilding)
       (void) 0;
    else if (fd < 0)
       (void) 0;
    else
       file_close(file_open(state->cln, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY));
    /* close */
    safe_free(state->cur);
    safe_free(state->ne_w);
    safe_free(state->cln);
    if (state->fd >= 0)
       file_close(state->fd);
    state->fd = -1;
    safe_free(state);
    sd->log.clean.state = NULL;
    sd->log.clean.write = NULL;
}

static void
storeSwapLogDataFree(void *s)
{
    memFree(s, MEM_SWAP_LOG_DATA);
}

static void
storeUfsDirSwapLog(const SwapDir * sd, const StoreEntry * e, int op)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) sd->fsdata;
    storeSwapLogData *s = ( storeSwapLogData *)memAllocate(MEM_SWAP_LOG_DATA);

    s->op = (char) op;
    s->swap_filen = e->swap_filen;
    s->timestamp = e->timestamp;
    s->lastref = e->lastref;
    s->expires = e->expires;
    s->lastmod = e->lastmod;
    s->swap_file_sz = e->swap_file_sz;
    s->refcount = e->refcount;
    s->flags = e->flags;
    xmemcpy(s->key, e->hash.key, MD5_DIGEST_CHARS);
    file_write(ufsinfo->swaplog_fd,
       -1,
       s,
       sizeof(storeSwapLogData),
       NULL,
       NULL,
       (FREE *) storeSwapLogDataFree);
}

static void
storeUfsDirNewfs(SwapDir * sd)
{
    debug(47, 3) ("Creating swap space in %s\n", sd->path);
    storeUfsDirCreateDirectory(sd->path, 0);
    storeUfsDirCreateSwapSubDirs(sd);
}

static int
_Optlink rev_int_sort(const void *A, const void *B)
{
    const int *i1 = (const int *)A;
    const int *i2 = (const int *)B;
    return *i2 - *i1;
}

static int
storeUfsDirClean(int swap_index)
{
    DIR *dp = NULL;
    struct dir_ent *de = NULL;
    LOCAL_ARRAY(char, p1, MAXPATHLEN + 1);
    LOCAL_ARRAY(char, p2, MAXPATHLEN + 1);
#if USE_TRUNCATE
    struct stat sb;
#endif
    int files[20];
    int swapfileno;
    int fn;                    /* same as swapfileno, but with dirn bits set */
    int n = 0;
    int k = 0;
    int N0, N1, N2;
    int D0, D1, D2;
    SwapDir *SD;
    ufsinfo_t *ufsinfo;
    N0 = n_ufs_dirs;
    D0 = ufs_dir_index[swap_index % N0];
    SD = &Config.cacheSwap.swapDirs[D0];
    ufsinfo = (ufsinfo_t *) SD->fsdata;
    N1 = ufsinfo->l1;
    D1 = (swap_index / N0) % N1;
    N2 = ufsinfo->l2;
    D2 = ((swap_index / N0) / N1) % N2;
//  snprintf(p1, SQUID_MAXPATHLEN, "%s/%02X/%02X",
    snprintf(p1, SQUID_MAXPATHLEN, "%s\\%02X\\%02X",
       Config.cacheSwap.swapDirs[D0].path, D1, D2);
    debug(36, 3) ("storeDirClean: Cleaning directory %s\n", p1);
    dp = opendir(p1);
    if (dp == NULL) {
       if (errno == ENOENT) {
           debug(36, 0) ("storeDirClean: WARNING: Creating %s\n", p1);
#ifdef _SQUID_OS2VAC_
           if (mkdir(p1) == 0)
#else
           if (mkdir(p1, 0777) == 0)
#endif
               return 0;
       }
       debug(50, 0) ("storeDirClean: %s: %s\n", p1, xstdio_strerror());
       safeunlink(p1, 1);
       return 0;
    }
    while ((de = readdir(dp)) != NULL && k < 20) {
       if (sscanf(de->d_name, "%X", &swapfileno) != 1)
           continue;
       fn = swapfileno;        /* XXX should remove this cruft ! */
       if (storeUfsDirValidFileno(SD, fn, 1))
           if (storeUfsDirMapBitTest(SD, fn))
               if (storeUfsFilenoBelongsHere(fn, D0, D1, D2))
                   continue;
#if USE_TRUNCATE
       if (!stat(de->d_name, &sb))
           if (sb.st_size == 0)
               continue;
#endif
       files[k++] = swapfileno;
    }
    closedir(dp);
    if (k == 0)
       return 0;
    qsort(files, k, sizeof(int), rev_int_sort);
    if (k > 10)
       k = 10;
    for (n = 0; n < k; n++) {
       debug(36, 3) ("storeDirClean: Cleaning file %08X\n", files[n]);
//     snprintf(p2, MAXPATHLEN + 1, "%s/%08X", p1, files[n]);
       snprintf(p2, MAXPATHLEN + 1, "%s\\%08X", p1, files[n]);
#if USE_TRUNCATE
       truncate(p2, 0);
#else
       safeunlink(p2, 0);
#endif
       statCounter.swap.files_cleaned++;
    }
    debug(36, 3) ("Cleaned %d unused files from %s\n", k, p1);
    return k;
}

static void
storeUfsDirCleanEvent(void *unused)
{
    static int swap_index = 0;
    int i;
    int j = 0;
    int n = 0;
    /*
     * Assert that there are UFS cache_dirs configured, otherwise
     * we should never be called.
     */
    assert(n_ufs_dirs);
    if (NULL == ufs_dir_index) {
       SwapDir *sd;
       ufsinfo_t *ufsinfo;
       /*
        * Initialize the little array that translates UFS cache_dir
        * number into the Config.cacheSwap.swapDirs array index.
        */
       ufs_dir_index = (int *) xcalloc(n_ufs_dirs, sizeof(*ufs_dir_index));
       for (i = 0, n = 0; i < Config.cacheSwap.n_configured; i++) {
           sd = &Config.cacheSwap.swapDirs[i];
           if (!storeUfsDirIs(sd))
               continue;
           ufs_dir_index[n++] = i;
           ufsinfo = (ufsinfo_t *) sd->fsdata;
           j += (ufsinfo->l1 * ufsinfo->l2);
       }
       assert(n == n_ufs_dirs);
       /*
        * Start the storeUfsDirClean() swap_index with a random
        * value.  j equals the total number of UFS level 2
        * swap directories
        */
       swap_index = (int) (squid_random() % j);
    }
    if (0 == store_dirs_rebuilding) {
       store_dirs_rebuild_progress =0;
       n = storeUfsDirClean(swap_index);
       swap_index++;
    }
    eventAdd("storeDirClean", storeUfsDirCleanEvent, NULL,
       15.0 * exp(-0.25 * n), 1);
}

static int
storeUfsDirIs(SwapDir * sd)
{
    if (strncmp(sd->type, "ufs", 3) == 0)
       return 1;
    return 0;
}

/*
 * Does swapfile number 'fn' belong in cachedir #F0,
 * level1 dir #F1, level2 dir #F2?
 */
static int
storeUfsFilenoBelongsHere(int fn, int F0, int F1, int F2)
{
    int D1, D2;
    int L1, L2;
    int filn = fn;
    ufsinfo_t *ufsinfo;
    assert(F0 < Config.cacheSwap.n_configured);
    ufsinfo = (ufsinfo_t *) Config.cacheSwap.swapDirs[F0].fsdata;
    L1 = ufsinfo->l1;
    L2 = ufsinfo->l2;
    D1 = ((filn / L2) / L2) % L1;
    if (F1 != D1)
       return 0;
    D2 = (filn / L2) % L2;
    if (F2 != D2)
       return 0;
    return 1;
}

int
storeUfsDirValidFileno(SwapDir * SD, sfileno filn, int flag)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) SD->fsdata;
    if (filn < 0)
       return 0;
    /*
     * If flag is set it means out-of-range file number should
     * be considered invalid.
     */
    if (flag)
       if (filn > ufsinfo->map->max_n_files)
           return 0;
    return 1;
}

void
storeUfsDirMaintain(SwapDir * SD)
{
    StoreEntry *e = NULL;
    int removed = 0;
    int max_scan;
    int max_remove;
    double f;
    RemovalPurgeWalker *walker;
    /* We can't delete objects while rebuilding swap */
    if (store_dirs_rebuilding) {
       return;
    } else {
       f = (double) (SD->cur_size - SD->low_size) / (SD->max_size - SD->low_size);
       f = f < 0.0 ? 0.0 : f > 1.0 ? 1.0 : f;
       max_scan = (int) (f * 400.0 + 100.0);
       max_remove = (int) (f * 70.0 + 10.0);
       /*
        * This is kinda cheap, but so we need this priority hack?
        */
    }
    debug(47, 3) ("storeMaintainSwapSpace: f=%f, max_scan=%d, max_remove=%d\n", f, max_scan, max_remove);
    walker = SD->repl->PurgeInit(SD->repl, max_scan);
    while (1) {
       if (SD->cur_size < SD->low_size)
           break;
       if (removed >= max_remove)
           break;
       e = walker->Next(walker);
       if (!e)
           break;              /* no more objects */
       removed++;
       storeRelease(e);
    }
    walker->Done(walker);
    debug(47,(removed ? 2 : 3)) ("storeUfsDirMaintain: %s removed %d/%d f=%.03f max_scan=%d\n",
       SD->path, removed, max_remove, f, max_scan);
}

/*
 * storeUfsDirCheckObj
 *
 * This routine is called by storeDirSelectSwapDir to see if the given
 * object is able to be stored on this filesystem. UFS filesystems will
 * happily store anything as long as the LRU time isn't too small.
 */
int
storeUfsDirCheckObj(SwapDir * SD, const StoreEntry * e)
{
    /* Return 999 (99.9%) constant load */
    return 999;
}

/*
 * storeUfsDirRefObj
 *
 * This routine is called whenever an object is referenced, so we can
 * maintain replacement information within the storage fs.
 */
void
storeUfsDirRefObj(SwapDir * SD, StoreEntry * e)
{
    debug(47, 3) ("storeUfsDirRefObj: referencing %p %d/%d\n", e, e->swap_dirn,
       e->swap_filen);
    if (SD->repl->Referenced)
       SD->repl->Referenced(SD->repl, e, &e->repl);
}

/*
 * storeUfsDirUnrefObj
 * This routine is called whenever the last reference to an object is
 * removed, to maintain replacement information within the storage fs.
 */
void
storeUfsDirUnrefObj(SwapDir * SD, StoreEntry * e)
{
    debug(47, 3) ("storeUfsDirUnrefObj: referencing %p %d/%d\n", e, e->swap_dirn,
       e->swap_filen);
    if (SD->repl->Dereferenced)
       SD->repl->Dereferenced(SD->repl, e, &e->repl);
}

/*
 * storeUfsDirUnlinkFile
 *
 * This routine unlinks a file and pulls it out of the bitmap.
 * It used to be in storeUfsUnlink(), however an interface change
 * forced this bit of code here. Eeek.
 */
void
storeUfsDirUnlinkFile(SwapDir * SD, sfileno f)
{
    debug(79, 3) ("storeUfsDirUnlinkFile: unlinking fileno %08X\n", f);
    /* storeUfsDirMapBitReset(SD, f); */
#if USE_UNLINKD
    unlinkdUnlink(storeUfsDirFullPath(SD, f, NULL));
#elif USE_TRUNCATE
    truncate(storeUfsDirFullPath(SD, f, NULL), 0);
#else
    unlink(storeUfsDirFullPath(SD, f, NULL));
#endif
}

/*
 * Add and remove the given StoreEntry from the replacement policy in
 * use.
 */

void
storeUfsDirReplAdd(SwapDir * SD, StoreEntry * e)
{
    debug(47, 4) ("storeUfsDirReplAdd: added node %p to dir %d\n", e,
       SD->index);
    SD->repl->Add(SD->repl, e, &e->repl);
}


void
storeUfsDirReplRemove(StoreEntry * e)
{
    SwapDir *SD = INDEXSD(e->swap_dirn);
    debug(47, 4) ("storeUfsDirReplRemove: remove node %p from dir %d\n", e,
       SD->index);
    SD->repl->Remove(SD->repl, e, &e->repl);
}



/* ========== LOCAL FUNCTIONS ABOVE, GLOBAL FUNCTIONS BELOW ========== */

void
storeUfsDirStats(SwapDir * SD, StoreEntry * sentry)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *)SD->fsdata;
    int totl_kb = 0;
    int free_kb = 0;
    int totl_in = 0;
    int free_in = 0;
    int x;
    storeAppendPrintf(sentry, "First level subdirectories: %d\n", ufsinfo->l1);
    storeAppendPrintf(sentry, "Second level subdirectories: %d\n", ufsinfo->l2);
    storeAppendPrintf(sentry, "Maximum Size: %d KB\n", SD->max_size);
    storeAppendPrintf(sentry, "Current Size: %d KB\n", SD->cur_size);
    storeAppendPrintf(sentry, "Percent Used: %0.2f%%\n",
       100.0 * SD->cur_size / SD->max_size);
    storeAppendPrintf(sentry, "Filemap bits in use: %d of %d (%d%%)\n",
       ufsinfo->map->n_files_in_map, ufsinfo->map->max_n_files,
       percent(ufsinfo->map->n_files_in_map, ufsinfo->map->max_n_files));
    x = storeDirGetUFSStats(SD->path, &totl_kb, &free_kb, &totl_in, &free_in);
    if (0 == x) {
       storeAppendPrintf(sentry, "Filesystem Space in use: %d/%d KB (%d%%)\n",
           totl_kb - free_kb,
           totl_kb,
           percent(totl_kb - free_kb, totl_kb));
       storeAppendPrintf(sentry, "Filesystem Inodes in use: %d/%d (%d%%)\n",
           totl_in - free_in,
           totl_in,
           percent(totl_in - free_in, totl_in));
    }
    storeAppendPrintf(sentry, "Flags:");
    if (SD->flags.selected)
       storeAppendPrintf(sentry, " SELECTED");
    if (SD->flags.read_only)
       storeAppendPrintf(sentry, " READ-ONLY");
    storeAppendPrintf(sentry, "\n");
}

static struct cache_dir_option options[] =
{
#if NOT_YET_DONE
    {"L1", storeUfsDirParseL1, storeUfsDirDumpL1},
    {"L2", storeUfsDirParseL2, storeUfsDirDumpL2},
#endif
    {NULL, NULL}
};

/*
 * storeUfsDirReconfigure
 *
 * This routine is called when the given swapdir needs reconfiguring
 */
static void
storeUfsDirReconfigure(SwapDir * sd, int index, char *path)
{
    int i;
    int size;
    int l1;
    int l2;

    i = GetInteger();
    size = i << 10;            /* Mbytes to kbytes */
    if (size <= 0)
       fatal("storeUfsDirReconfigure: invalid size value");
    i = GetInteger();
    l1 = i;
    if (l1 <= 0)
       fatal("storeUfsDirReconfigure: invalid level 1 directories value");
    i = GetInteger();
    l2 = i;
    if (l2 <= 0)
       fatal("storeUfsDirReconfigure: invalid level 2 directories value");

    /* just reconfigure it */
    if (size == sd->max_size)
       debug(3, 1) ("Cache dir '%s' size remains unchanged at %d KB\n",
           path, size);
    else
       debug(3, 1) ("Cache dir '%s' size changed to %d KB\n",
           path, size);
    sd->max_size = size;

    parse_cachedir_options(sd, options, 1);
}

void
storeUfsDirDump(StoreEntry * entry, SwapDir * s)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) s->fsdata;
    storeAppendPrintf(entry, " %d %d %d",
       s->max_size >> 10,
       ufsinfo->l1,
       ufsinfo->l2);
    dump_cachedir_options(entry, options, s);
}

/*
 * Only "free" the filesystem specific stuff here
 */
static void
storeUfsDirFree(SwapDir * s)
{
    ufsinfo_t *ufsinfo = (ufsinfo_t *) s->fsdata;
    if (ufsinfo->swaplog_fd > -1) {
       file_close(ufsinfo->swaplog_fd);
       ufsinfo->swaplog_fd = -1;
    }
    filemapFreeMemory(ufsinfo->map);
    xfree(ufsinfo);
    s->fsdata = NULL;          /* Will aid debugging... */

}

char *
storeUfsDirFullPath(SwapDir * SD, sfileno filn, char *fullpath)
{
    LOCAL_ARRAY(char, fullfilename, SQUID_MAXPATHLEN);
    ufsinfo_t *ufsinfo = (ufsinfo_t *) SD->fsdata;
    int L1 = ufsinfo->l1;
    int L2 = ufsinfo->l2;
    if (!fullpath)
       fullpath = fullfilename;
    fullpath[0] = '\0';
//    snprintf(fullpath, SQUID_MAXPATHLEN, "%s/%02X/%02X/%08X", UNIX path
    snprintf(fullpath, SQUID_MAXPATHLEN, "%s\\%02X\\%02X\\%08X",  //OS2 path
       SD->path,
       ((filn / L2) / L2) % L1,
       (filn / L2) % L2,
       filn);
    return fullpath;
}

/*
 * storeUfsCleanupDoubleCheck
 *
 * This is called by storeCleanup() if -S was given on the command line.
 */
static int
storeUfsCleanupDoubleCheck(SwapDir * sd, StoreEntry * e)
{
    struct stat sb;
    if (stat(storeUfsDirFullPath(sd, e->swap_filen, NULL), &sb) < 0) {
       debug(47, 0) ("storeUfsCleanupDoubleCheck: MISSING SWAP FILE\n");
       debug(47, 0) ("storeUfsCleanupDoubleCheck: FILENO %08X\n", e->swap_filen);
       debug(47, 0) ("storeUfsCleanupDoubleCheck: PATH %s\n",
           storeUfsDirFullPath(sd, e->swap_filen, NULL));
       storeEntryDump(e, 0);
       return -1;
    }
    if (e->swap_file_sz != sb.st_size) {
       debug(47, 0) ("storeUfsCleanupDoubleCheck: SIZE MISMATCH\n");
       debug(47, 0) ("storeUfsCleanupDoubleCheck: FILENO %08X\n", e->swap_filen);
       debug(47, 0) ("storeUfsCleanupDoubleCheck: PATH %s\n",
           storeUfsDirFullPath(sd, e->swap_filen, NULL));
       debug(47, 0) ("storeUfsCleanupDoubleCheck: ENTRY SIZE: %ld, FILE SIZE: %ld\n",
           (long int) e->swap_file_sz, (long int) sb.st_size);
       storeEntryDump(e, 0);
       return -1;
    }
    return 0;
}

/*
 * storeUfsDirParse
 *
 * Called when a *new* fs is being setup.
 */
static void
storeUfsDirParse(SwapDir * sd, int index, char *path)
{
    int i;
    int size;
    int l1;
    int l2;
    ufsinfo_t *ufsinfo;

    i = GetInteger();
    size = i << 10;            /* Mbytes to kbytes */
    if (size <= 0)
       fatal("storeUfsDirParse: invalid size value");
    i = GetInteger();
    l1 = i;
    if (l1 <= 0)
       fatal("storeUfsDirParse: invalid level 1 directories value");
    i = GetInteger();
    l2 = i;
    if (l2 <= 0)
       fatal("storeUfsDirParse: invalid level 2 directories value");

    ufsinfo = (ufsinfo_t *) xmalloc(sizeof(ufsinfo_t));
    if (ufsinfo == NULL)
       fatal("storeUfsDirParse: couldn't xmalloc() ufsinfo_t!\n");

    sd->index = index;
    sd->path = xstrdup(path);
    sd->max_size = size;
    sd->fsdata = ufsinfo;
    ufsinfo->l1 = l1;
    ufsinfo->l2 = l2;
    ufsinfo->swaplog_fd = -1;
    ufsinfo->map = NULL;       /* Debugging purposes */
    ufsinfo->suggest = 0;
    sd->init = storeUfsDirInit;
    sd->newfs = storeUfsDirNewfs;
    sd->dump = storeUfsDirDump;
    sd->freefs = storeUfsDirFree;
    sd->dblcheck = storeUfsCleanupDoubleCheck;
    sd->statfs = storeUfsDirStats;
    sd->maintainfs = storeUfsDirMaintain;
    sd->checkobj = storeUfsDirCheckObj;
    sd->refobj = storeUfsDirRefObj;
    sd->unrefobj = storeUfsDirUnrefObj;
    sd->callback = NULL;
    sd->sync = NULL;
    sd->obj.create = storeUfsCreate;
    sd->obj.open = storeUfsOpen;
    sd->obj.close = storeUfsClose;
    sd->obj.read = storeUfsRead;
    sd->obj.write = storeUfsWrite;
    sd->obj.unlink = storeUfsUnlink;
    sd->log.open = storeUfsDirOpenSwapLog;
    sd->log.close = storeUfsDirCloseSwapLog;
    sd->log.write = storeUfsDirSwapLog;
    sd->log.clean.start = storeUfsDirWriteCleanStart;
    sd->log.clean.nextentry = storeUfsDirCleanLogNextEntry;
    sd->log.clean.done = storeUfsDirWriteCleanDone;

    parse_cachedir_options(sd, options, 1);

    /* Initialise replacement policy stuff */
    sd->repl = createRemovalPolicy(Config.replPolicy);
}

/*
 * Initial setup / end destruction
 */
static void
storeUfsDirDone(void)
{
    memPoolDestroy(ufs_state_pool);
//2.6    memPoolDestroy(&ufs_state_pool);
    ufs_initialised = 0;
}

void
storeFsSetup_ufs(storefs_entry_t * storefs)
{
    assert(!ufs_initialised);
    storefs->parsefunc = storeUfsDirParse;
    storefs->reconfigurefunc = storeUfsDirReconfigure;
    storefs->donefunc = storeUfsDirDone;
    ufs_state_pool = memPoolCreate("UFS IO State data", sizeof(ufsstate_t));
    ufs_initialised = 1;
}


#endif  // _SQUID_OS2VAC_

