/*
* mountd now keeps an open fd for the etab at all times to make sure that the
* inode number changes when the xtab_export_write is done. If you change the
* routine below such that the files are edited in place, then you'll need to
* fix the auth_reload logic as well...
*/
static int
xtab_write(char *xtab, char *xtabtmp, char *lockfn, int is_export)
{
struct exportent xe;
nfs_export *exp;
int lockid, i;
if ((lockid = xflock(lockfn, "w")) < 0) {
xlog(L_ERROR, "can't lock %s for writing", xtab);
return 0;
}
setexportent(xtabtmp, "w");
for (i = 0; i < MCL_MAXTYPES; i++) {
for (exp = exportlist[i].p_head; exp; exp = exp->m_next) {
if (is_export && !exp->m_xtabent)
continue;
if (!is_export && ! exp->m_exported)
continue;
/* write out the export entry using the FQDN */
xe = exp->m_export;
xe.e_hostname = exp->m_client->m_hostname;
putexportent(&xe);
}
}
endexportent();
cond_rename(xtabtmp, xtab);
xfunlock(lockid);
return 1;
}
/**
* export_read - read entries from /etc/exports
* @fname: name of file to read from
*
*/
void
export_read(char *fname)
{
struct exportent *eep;
nfs_export *exp;
setexportent(fname, "r");
while ((eep = getexportent(0,1)) != NULL) {
exp = export_lookup(eep->e_hostname, eep->e_path, 0);
if (!exp)
export_create(eep, 0);
else
warn_duplicated_exports(exp, eep);
}
endexportent();
}
void
xtab_append(nfs_export *exp)
{
struct exportent xe;
int lockid;
if ((lockid = xflock(_PATH_XTABLCK, "w")) < 0)
return;
setexportent(_PATH_XTAB, "a");
xe = exp->m_export;
xe.e_hostname = exp->m_client->m_hostname;
putexportent(&xe);
endexportent();
xfunlock(lockid);
exp->m_xtabent = 1;
}
static int
xtab_read(char *xtab, char *lockfn, int is_export)
{
/* is_export == 0 => reading /proc/fs/nfs/exports - we know these things are exported to kernel
* is_export == 1 => reading /var/lib/nfs/etab - these things are allowed to be exported
* is_export == 2 => reading /var/lib/nfs/xtab - these things might be known to kernel
*/
struct exportent *xp;
nfs_export *exp;
int lockid;
if ((lockid = xflock(lockfn, "r")) < 0)
return 0;
setexportent(xtab, "r");
if (is_export == 1)
v4root_needed = 1;
while ((xp = getexportent(is_export==0, 0)) != NULL) {
if (!(exp = export_lookup(xp->e_hostname, xp->e_path, is_export != 1)) &&
!(exp = export_create(xp, is_export!=1))) {
continue;
}
switch (is_export) {
case 0:
exp->m_exported = 1;
break;
case 1:
exp->m_xtabent = 1;
exp->m_mayexport = 1;
if ((xp->e_flags & NFSEXP_FSID) && xp->e_fsid == 0)
v4root_needed = 0;
break;
case 2:
exp->m_exported = -1;/* may be exported */
break;
}
}
endexportent();
xfunlock(lockid);
return 0;
}
