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lookup in-core nodes in readdir() and provide the real inode for

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each node.  This makes pwd work.
This commit is contained in:
pooka 2007-02-16 16:39:56 +00:00
parent ddd5ed5765
commit 27f51110f8
1 changed files with 30 additions and 9 deletions
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39
share/examples/puffs/sysctlfs/sysctlfs.c
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@ -1,4 +1,4 @@
/* $NetBSD: sysctlfs.c,v 1.14 2007/02/15 17:07:31 pooka Exp $ */
/* $NetBSD: sysctlfs.c,v 1.15 2007/02/16 16:39:56 pooka Exp $ */
/*
* Copyright (c) 2006, 2007 Antti Kantee. All Rights Reserved.
@ -29,11 +29,9 @@
*/
/*
* sysctlfs: mount sysctls as a file system tree
*
* XXXX: this is a very quick hack fs. it's not even complete,
* please don't use it as an example. actually, this code is so bad that
* it's nearly a laugh, it's nearly a laugh, but it's really a cry
* sysctlfs: mount sysctls as a file system tree. Supports query and
* modify of nodes in the sysctl namespace in addition to namespace
* traversal.
*/
#include <sys/types.h>
@ -91,8 +89,10 @@ sysctlfs_pathbuild(struct puffs_usermount *pu,
assert(sname != NULL);
clen = parent->po_len;
if (comp->po_len == SFSPATH_DOTDOT)
if (comp->po_len == SFSPATH_DOTDOT) {
assert(clen != 0);
clen--;
}
memcpy(sname, parent->po_path, clen * sizeof(int));
@ -437,13 +437,17 @@ sysctlfs_node_readdir(struct puffs_cc *pcc, void *opc,
struct dirent *dent, const struct puffs_cred *pcr,
off_t *readoff, size_t *reslen)
{
struct puffs_usermount *pu = puffs_cc_getusermount(pcc);
struct sysctlnode sn[SFS_NODEPERDIR];
struct sysctlnode qnode;
struct puffs_node *pn_dir = opc;
struct sfsnode *sfs_dir = pn_dir->pn_data;
struct puffs_node *pn_res;
struct puffs_pathobj po;
struct sfsnode *sfs_dir = pn_dir->pn_data, *sfs_ent;
SfsName *sname;
size_t sl;
enum vtype vt;
ino_t id;
int i;
again:
@ -463,6 +467,9 @@ sysctlfs_node_readdir(struct puffs_cc *pcc, void *opc,
&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++, (*readoff)++) {
@ -470,7 +477,21 @@ sysctlfs_node_readdir(struct puffs_cc *pcc, void *opc,
vt = VDIR;
else
vt = VREG;
if (!puffs_nextdent(&dent, sn[i].sysctl_name, nextid++,
/*
* 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;
}