int
puffs_gendotdent(struct dirent **dent, ino_t id, int dotdot, size_t *reslen)
{
const char *name;
assert(dotdot == 0 || dotdot == 1);
name = dotdot == 0 ? "." : "..";
return puffs_nextdent(dent, name, id, DT_DIR, reslen);
}
int
dtfs_node_readdir(struct puffs_usermount *pu, void *opc,
struct dirent *dent, off_t *readoff, size_t *reslen,
const struct puffs_cred *pcr,
int *eofflag, off_t *cookies, size_t *ncookies)
{
struct puffs_node *pn = opc;
struct puffs_node *pn_nth;
struct dtfs_dirent *dfd_nth;
if (pn->pn_va.va_type != VDIR)
return ENOTDIR;
dtfs_updatetimes(pn, 1, 0, 0);
*ncookies = 0;
again:
if (*readoff == DENT_DOT || *readoff == DENT_DOTDOT) {
puffs_gendotdent(&dent, pn->pn_va.va_fileid, *readoff, reslen);
(*readoff)++;
PUFFS_STORE_DCOOKIE(cookies, ncookies, *readoff);
goto again;
}
for (;;) {
dfd_nth = dtfs_dirgetnth(pn->pn_data, DENT_ADJ(*readoff));
if (!dfd_nth) {
*eofflag = 1;
break;
}
pn_nth = dfd_nth->dfd_node;
if (!puffs_nextdent(&dent, dfd_nth->dfd_name,
pn_nth->pn_va.va_fileid,
puffs_vtype2dt(pn_nth->pn_va.va_type),
reslen))
break;
(*readoff)++;
PUFFS_STORE_DCOOKIE(cookies, ncookies, *readoff);
}
return 0;
}
int
sysctlfs_node_readdir(struct puffs_usermount *pu, void *opc,
struct dirent *dent, off_t *readoff, size_t *reslen,
const struct puffs_cred *pcr, int *eofflag,
off_t *cookies, size_t *ncookies)
{
struct sysctlnode sn[SFS_NODEPERDIR];
struct sysctlnode qnode;
struct puffs_node *pn_dir = opc;
struct puffs_node *pn_res;
struct puffs_pathobj po;
struct sfsnode *sfs_dir = pn_dir->pn_data, *sfs_ent;
SfsName *sname;
size_t sl, i;
enum vtype vt;
ino_t id;
*ncookies = 0;
again:
if (*readoff == DENT_DOT || *readoff == DENT_DOTDOT) {
puffs_gendotdent(&dent, sfs_dir->myid, *readoff, reslen);
(*readoff)++;
PUFFS_STORE_DCOOKIE(cookies, ncookies, *readoff);
goto again;
}
memset(&qnode, 0, sizeof(qnode));
sl = SFS_NODEPERDIR * sizeof(struct sysctlnode);
qnode.sysctl_flags = SYSCTL_VERSION;
sname = PNPATH(pn_dir);
(*sname)[PNPLEN(pn_dir)] = CTL_QUERY;
if (sysctl(*sname, PNPLEN(pn_dir) + 1, sn, &sl,
&qnode, sizeof(qnode)) == -1)
return ENOENT;
po.po_path = sname;
po.po_len = PNPLEN(pn_dir)+1;
for (i = DENT_ADJ(*readoff); i < sl / sizeof(struct sysctlnode); i++) {
if (SYSCTL_TYPE(sn[i].sysctl_flags) == CTLTYPE_NODE)
vt = VDIR;
else
vt = VREG;
/*
* check if the node exists. if so, give it the real
* inode number. otherwise just fake it.
*/
(*sname)[PNPLEN(pn_dir)] = sn[i].sysctl_num;
pn_res = puffs_pn_nodewalk(pu, puffs_path_walkcmp, &po);
if (pn_res) {
sfs_ent = pn_res->pn_data;
id = sfs_ent->myid;
} else {
id = nextid++;
}
if (!puffs_nextdent(&dent, sn[i].sysctl_name, id,
puffs_vtype2dt(vt), reslen))
return 0;
(*readoff)++;
PUFFS_STORE_DCOOKIE(cookies, ncookies, *readoff);
}
*eofflag = 1;
return 0;
}
/*
* Problem is that 9P doesn't allow seeking into a directory. So we
* maintain a list of active fids for any given directory. They
* start living at the first read and exist either until the directory
* is closed or until they reach the end.
*/
int
puffs9p_node_readdir(struct puffs_usermount *pu, void *opc, struct dirent *dent,
off_t *readoff, size_t *reslen, const struct puffs_cred *pcr,
int *eofflag, off_t *cookies, size_t *ncookies)
{
AUTOVAR(pu);
struct puffs_node *pn = opc;
struct p9pnode *p9n = pn->pn_data;
struct vattr va;
struct dirfid *dfp;
char *name;
uint32_t count;
uint16_t statsize;
rv = getdfwithoffset(pu, p9n, *readoff, &dfp);
if (rv)
goto out;
tag = NEXTTAG(p9p);
p9pbuf_put_1(pb, P9PROTO_T_READ);
p9pbuf_put_2(pb, tag);
p9pbuf_put_4(pb, dfp->fid);
p9pbuf_put_8(pb, *readoff);
p9pbuf_put_4(pb, *reslen); /* XXX */
GETRESPONSE(pb);
p9pbuf_get_4(pb, &count);
/*
* if count is 0, assume we at end-of-dir. dfp is no longer
* useful, so nuke it
*/
if (count == 0) {
*eofflag = 1;
releasedf(pu, dfp);
goto out;
}
while (count > 0) {
if ((rv = proto_getstat(pb, &va, &name, &statsize))) {
/*
* If there was an error, it's unlikely we'll be
* coming back, so just nuke the dfp. If we do
* come back for some strange reason, we'll just
* regen it.
*/
releasedf(pu, dfp);
goto out;
}
puffs_nextdent(&dent, name, va.va_fileid,
puffs_vtype2dt(va.va_type), reslen);
count -= statsize;
*readoff += statsize;
dfp->seekoff += statsize;
free(name);
}
storedf(p9n, dfp);
out:
RETURN(rv);
}
