int
iso_uiodir(struct isoreaddir *idp, struct dirent *dp, off_t off)
{
int error;
dp->d_name[dp->d_namlen] = 0;
dp->d_reclen = _DIRENT_SIZE(dp);
if (idp->uio->uio_resid < dp->d_reclen) {
idp->eofflag = 0;
return (-1);
}
if (idp->cookies) {
if (idp->ncookies <= 0) {
idp->eofflag = 0;
return (-1);
}
*idp->cookies++ = off;
--idp->ncookies;
}
if ((error = uiomove(dp, dp->d_reclen, idp->uio)) != 0)
return (error);
idp->uio_off = off;
return (0);
}
int
iso_shipdir(struct isoreaddir *idp)
{
struct dirent *dp;
int cl, sl, assoc;
int error;
char *cname, *sname;
cl = idp->current.d_namlen;
cname = idp->current.d_name;
if ((assoc = cl > 1 && *cname == ASSOCCHAR)) {
cl--;
cname++;
}
dp = &idp->saveent;
sname = dp->d_name;
if (!(sl = dp->d_namlen)) {
dp = &idp->assocent;
sname = dp->d_name + 1;
sl = dp->d_namlen - 1;
}
if (sl > 0) {
if (sl != cl
|| memcmp(sname, cname, sl)) {
if (idp->assocent.d_namlen) {
error = iso_uiodir(idp, &idp->assocent,
idp->assocoff);
if (error)
return (error);
idp->assocent.d_namlen = 0;
}
if (idp->saveent.d_namlen) {
error = iso_uiodir(idp, &idp->saveent,
idp->saveoff);
if (error)
return (error);
idp->saveent.d_namlen = 0;
}
}
}
idp->current.d_reclen = _DIRENT_SIZE(&idp->current);
if (assoc) {
idp->assocoff = idp->curroff;
memcpy(&idp->assocent, &idp->current, idp->current.d_reclen);
} else {
idp->saveoff = idp->curroff;
memcpy(&idp->saveent, &idp->current, idp->current.d_reclen);
}
return (0);
}
int
adosfs_readdir(void *v)
{
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
kauth_cred_t a_cred;
int *a_eofflag;
off_t **a_cookies;
int *a_ncookies;
} */ *sp = v;
int error, first, useri, chainc, hashi, scanned;
u_long nextbn;
struct dirent ad, *adp;
struct anode *pap, *ap;
struct vnode *vp;
struct uio *uio = sp->a_uio;
off_t uoff = uio->uio_offset;
off_t *cookies = NULL;
int ncookies = 0;
#ifdef ADOSFS_DIAGNOSTIC
advopprint(sp);
#endif
if (sp->a_vp->v_type != VDIR) {
error = ENOTDIR;
goto reterr;
}
if (uoff < 0) {
error = EINVAL;
goto reterr;
}
pap = VTOA(sp->a_vp);
adp = &ad;
error = nextbn = hashi = chainc = scanned = 0;
first = useri = uoff / sizeof ad;
/*
* If offset requested is not on a slot boundary
*/
if (uoff % sizeof ad) {
error = EINVAL;
goto reterr;
}
for (;;) {
if (hashi == pap->ntabent) {
*sp->a_eofflag = 1;
break;
}
if (pap->tab[hashi] == 0) {
hashi++;
continue;
}
if (nextbn == 0)
nextbn = pap->tab[hashi];
/*
* First determine if we can skip this chain
*/
if (chainc == 0) {
int skip;
skip = useri - scanned;
if (pap->tabi[hashi] > 0 && pap->tabi[hashi] <= skip) {
scanned += pap->tabi[hashi];
hashi++;
nextbn = 0;
continue;
}
}
/*
* Now [continue to] walk the chain
*/
ap = NULL;
do {
error = VFS_VGET(pap->amp->mp, (ino_t)nextbn, &vp);
if (error)
goto reterr;
ap = VTOA(vp);
scanned++;
chainc++;
nextbn = ap->hashf;
/*
* check for end of chain.
*/
if (nextbn == 0) {
pap->tabi[hashi] = chainc;
hashi++;
chainc = 0;
} else if (pap->tabi[hashi] <= 0 &&
-chainc < pap->tabi[hashi])
pap->tabi[hashi] = -chainc;
if (useri >= scanned) {
vput(vp);
ap = NULL;
}
} while (ap == NULL && nextbn != 0);
/*
* We left the loop but without a result so do main over.
*/
if (ap == NULL)
continue;
/*
* Fill in dirent record
*/
memset(adp, 0, sizeof *adp);
adp->d_fileno = ap->block;
/*
* This deserves a function in kern/vfs_subr.c
*/
switch (ATOV(ap)->v_type) {
case VREG:
adp->d_type = DT_REG;
break;
case VDIR:
adp->d_type = DT_DIR;
break;
case VLNK:
adp->d_type = DT_LNK;
break;
default:
adp->d_type = DT_UNKNOWN;
break;
}
adp->d_namlen = strlen(ap->name);
memcpy(adp->d_name, ap->name, adp->d_namlen);
adp->d_reclen = _DIRENT_SIZE(adp);
vput(vp);
if (adp->d_reclen > uio->uio_resid) {
if (useri == first) /* no room for even one entry */
error = EINVAL;
break;
}
error = uiomove(adp, adp->d_reclen, uio);
if (error)
break;
useri++;
}
ncookies = useri - first;
uio->uio_offset = uoff + ncookies * sizeof ad;
reterr:
#ifdef ADOSFS_DIAGNOSTIC
printf(" %d)", error);
#endif
if (sp->a_ncookies != NULL) {
*sp->a_ncookies = ncookies;
if (!error) {
*sp->a_cookies = cookies =
malloc(ncookies * sizeof *cookies, M_TEMP, M_WAITOK);
while (ncookies--) {
uoff += sizeof ad;
*cookies++ = uoff;
}
} else
*sp->a_cookies = NULL;
}
return(error);
}
/*
* Vnode op for readdir
*/
int
filecore_readdir(void *v)
{
struct vop_readdir_args /* {
struct vnode *a_vp;
struct uio *a_uio;
kauth_cred_t a_cred;
int *a_eofflag;
off_t **a_cookies;
int *a_ncookies;
} */ *ap = v;
struct uio *uio = ap->a_uio;
struct vnode *vdp = ap->a_vp;
struct filecore_node *dp;
struct filecore_mnt *fcmp;
struct buf *bp = NULL;
struct dirent *de;
struct filecore_direntry *dep = NULL;
int error = 0;
off_t *cookies = NULL;
int ncookies = 0;
int i;
off_t uiooff;
dp = VTOI(vdp);
if ((dp->i_dirent.attr & FILECORE_ATTR_DIR) == 0)
return (ENOTDIR);
if (uio->uio_offset % FILECORE_DIRENT_SIZE != 0)
return (EINVAL);
i = uio->uio_offset / FILECORE_DIRENT_SIZE;
uiooff = uio->uio_offset;
*ap->a_eofflag = 0;
fcmp = dp->i_mnt;
error = filecore_dbread(dp, &bp);
if (error) {
return error;
}
if (ap->a_ncookies == NULL)
cookies = NULL;
else {
*ap->a_ncookies = 0;
ncookies = uio->uio_resid / _DIRENT_MINSIZE((struct dirent *)0);
cookies = malloc(ncookies * sizeof(off_t), M_TEMP, M_WAITOK);
}
de = kmem_zalloc(sizeof(struct dirent), KM_SLEEP);
for (; ; i++) {
switch (i) {
case 0:
/* Fake the '.' entry */
de->d_fileno = dp->i_number;
de->d_type = DT_DIR;
de->d_namlen = 1;
strlcpy(de->d_name, ".", sizeof(de->d_name));
break;
case 1:
/* Fake the '..' entry */
de->d_fileno = filecore_getparent(dp);
de->d_type = DT_DIR;
de->d_namlen = 2;
strlcpy(de->d_name, "..", sizeof(de->d_name));
break;
default:
de->d_fileno = dp->i_dirent.addr +
((i - 2) << FILECORE_INO_INDEX);
dep = fcdirentry(bp->b_data, i - 2);
if (dep->attr & FILECORE_ATTR_DIR)
de->d_type = DT_DIR;
else
de->d_type = DT_REG;
if (filecore_fn2unix(dep->name, de->d_name,
/*###346 [cc] warning: passing arg 3 of `filecore_fn2unix' from incompatible pointer type%%%*/
&de->d_namlen)) {
*ap->a_eofflag = 1;
goto out;
}
break;
}
de->d_reclen = _DIRENT_SIZE(de);
if (uio->uio_resid < de->d_reclen)
goto out;
error = uiomove(de, de->d_reclen, uio);
if (error)
goto out;
uiooff += FILECORE_DIRENT_SIZE;
if (cookies) {
*cookies++ = i*FILECORE_DIRENT_SIZE;
(*ap->a_ncookies)++;
if (--ncookies == 0) goto out;
}
}
out:
if (cookies) {
*ap->a_cookies = cookies;
if (error) {
free(cookies, M_TEMP);
*ap->a_ncookies = 0;
*ap->a_cookies = NULL;
}
}
uio->uio_offset = uiooff;
#ifdef FILECORE_DEBUG_BR
printf("brelse(%p) vn3\n", bp);
#endif
brelse (bp, 0);
kmem_free(de, sizeof(*de));
return (error);
}
