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Commit bcb23e3c authored by Trond Myklebust's avatar Trond Myklebust
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NFSROOT: clean up the parser routines (patch by Fabian Frederic)

parent 15820773
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Showing with 143 additions and 75 deletions
fs/nfs/nfsroot.c
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......@@ -66,7 +66,8 @@
* is NOT for the length of the hostname.
* Hua Qin : Support for mounting root file system via
* NFS over TCP.
*/
* Fabian Frederick: Option parser rebuilt (using parser lib)
*/
#include <linux/config.h>
#include <linux/types.h>
......@@ -85,6 +86,7 @@
#include <linux/inet.h>
#include <linux/root_dev.h>
#include <net/ipconfig.h>
#include <linux/parser.h>
/* Define this to allow debugging output */
#undef NFSROOT_DEBUG
......@@ -114,92 +116,158 @@ static int mount_port __initdata = 0; /* Mount daemon port number */
***************************************************************************/
/*
* The following integer options are recognized
*/
static struct nfs_int_opts {
char *name;
int *val;
} root_int_opts[] __initdata = {
{ "port", &nfs_port },
{ "rsize", &nfs_data.rsize },
{ "wsize", &nfs_data.wsize },
{ "timeo", &nfs_data.timeo },
{ "retrans", &nfs_data.retrans },
{ "acregmin", &nfs_data.acregmin },
{ "acregmax", &nfs_data.acregmax },
{ "acdirmin", &nfs_data.acdirmin },
{ "acdirmax", &nfs_data.acdirmax },
{ NULL, NULL }
enum {
Opt_port, Opt_rsize, Opt_wsize, Opt_timeo, Opt_retrans, Opt_acregmin,
Opt_acregmax, Opt_acdirmin, Opt_acdirmax, Opt_soft, Opt_hard, Opt_intr,
Opt_nointr, Opt_posix, Opt_noposix, Opt_cto, Opt_nocto, Opt_ac,
Opt_noac, Opt_lock, Opt_nolock, Opt_v2, Opt_v3, Opt_udp, Opt_tcp,
Opt_broken_suid, Opt_err,
};
/*
* And now the flag options
*/
static struct nfs_bool_opts {
char *name;
int and_mask;
int or_mask;
} root_bool_opts[] __initdata = {
{ "soft", ~NFS_MOUNT_SOFT, NFS_MOUNT_SOFT },
{ "hard", ~NFS_MOUNT_SOFT, 0 },
{ "intr", ~NFS_MOUNT_INTR, NFS_MOUNT_INTR },
{ "nointr", ~NFS_MOUNT_INTR, 0 },
{ "posix", ~NFS_MOUNT_POSIX, NFS_MOUNT_POSIX },
{ "noposix", ~NFS_MOUNT_POSIX, 0 },
{ "cto", ~NFS_MOUNT_NOCTO, 0 },
{ "nocto", ~NFS_MOUNT_NOCTO, NFS_MOUNT_NOCTO },
{ "ac", ~NFS_MOUNT_NOAC, 0 },
{ "noac", ~NFS_MOUNT_NOAC, NFS_MOUNT_NOAC },
{ "lock", ~NFS_MOUNT_NONLM, 0 },
{ "nolock", ~NFS_MOUNT_NONLM, NFS_MOUNT_NONLM },
#ifdef CONFIG_NFS_V3
{ "v2", ~NFS_MOUNT_VER3, 0 },
{ "v3", ~NFS_MOUNT_VER3, NFS_MOUNT_VER3 },
#endif
{ "udp", ~NFS_MOUNT_TCP, 0 },
{ "tcp", ~NFS_MOUNT_TCP, NFS_MOUNT_TCP },
{ "broken_suid",~NFS_MOUNT_BROKEN_SUID, NFS_MOUNT_BROKEN_SUID },
{ NULL, 0, 0 }
static match_table_t tokens = {
{Opt_port, "port=%u"},
{Opt_rsize, "rsize=%u"},
{Opt_wsize, "wsize=%u"},
{Opt_timeo, "timeo=%u"},
{Opt_retrans, "retrans=%u"},
{Opt_acregmin, "acregmin=%u"},
{Opt_acregmax, "acregmax=%u"},
{Opt_acdirmin, "acdirmin=%u"},
{Opt_acdirmax, "acdirmax=%u"},
{Opt_soft, "soft"},
{Opt_hard, "hard"},
{Opt_intr, "intr"},
{Opt_nointr, "nointr"},
{Opt_posix, "posix"},
{Opt_noposix, "noposix"},
{Opt_cto, "cto"},
{Opt_nocto, "nocto"},
{Opt_ac, "ac"},
{Opt_noac, "noac"},
{Opt_lock, "lock"},
{Opt_nolock, "nolock"},
{Opt_v2, "v2"},
{Opt_v3, "v3"},
{Opt_udp, "udp"},
{Opt_tcp, "tcp"},
{Opt_broken_suid, "broken_suid"},
{Opt_err, NULL}
};
/*
* Parse option string.
*/
static void __init root_nfs_parse(char *name, char *buf)
static int __init root_nfs_parse(char *name, char *buf)
{
char *options, *val, *cp;
if ((options = strchr(name, ','))) {
*options++ = 0;
while ((cp = strsep(&options, ",")) != NULL) {
if (!*cp)
continue;
if ((val = strchr(cp, '='))) {
struct nfs_int_opts *opts = root_int_opts;
*val++ = '\0';
while (opts->name && strcmp(opts->name, cp))
opts++;
if (opts->name)
*(opts->val) = (int) simple_strtoul(val, NULL, 10);
} else {
struct nfs_bool_opts *opts = root_bool_opts;
while (opts->name && strcmp(opts->name, cp))
opts++;
if (opts->name) {
nfs_data.flags &= opts->and_mask;
nfs_data.flags |= opts->or_mask;
}
}
char *p;
substring_t args[MAX_OPT_ARGS];
int option;
if (!name)
return 1;
if (name[0] && strcmp(name, "default")){
strlcpy(buf, name, NFS_MAXPATHLEN);
return 1;
}
while ((p = strsep (&name, ",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
/* %u tokens only */
if (match_int(&args[0], &option))
return 0;
switch (token) {
case Opt_port:
nfs_port = option;
break;
case Opt_rsize:
nfs_data.rsize = option;
break;
case Opt_wsize:
nfs_data.wsize = option;
break;
case Opt_timeo:
nfs_data.timeo = option;
break;
case Opt_retrans:
nfs_data.retrans = option;
break;
case Opt_acregmin:
nfs_data.acregmin = option;
break;
case Opt_acregmax:
nfs_data.acregmax = option;
break;
case Opt_acdirmin:
nfs_data.acdirmin = option;
break;
case Opt_acdirmax:
nfs_data.acdirmax = option;
break;
case Opt_soft:
nfs_data.flags |= NFS_MOUNT_SOFT;
break;
case Opt_hard:
nfs_data.flags &= ~NFS_MOUNT_SOFT;
break;
case Opt_intr:
nfs_data.flags |= NFS_MOUNT_INTR;
break;
case Opt_nointr:
nfs_data.flags &= ~NFS_MOUNT_INTR;
break;
case Opt_posix:
nfs_data.flags |= NFS_MOUNT_POSIX;
break;
case Opt_noposix:
nfs_data.flags &= ~NFS_MOUNT_POSIX;
break;
case Opt_cto:
nfs_data.flags &= ~NFS_MOUNT_NOCTO;
break;
case Opt_nocto:
nfs_data.flags |= NFS_MOUNT_NOCTO;
break;
case Opt_ac:
nfs_data.flags &= ~NFS_MOUNT_NOAC;
break;
case Opt_noac:
nfs_data.flags |= NFS_MOUNT_NOAC;
break;
case Opt_lock:
nfs_data.flags &= ~NFS_MOUNT_NONLM;
break;
case Opt_nolock:
nfs_data.flags |= NFS_MOUNT_NONLM;
break;
case Opt_v2:
nfs_data.flags &= ~NFS_MOUNT_VER3;
break;
case Opt_v3:
nfs_data.flags |= NFS_MOUNT_VER3;
break;
case Opt_udp:
nfs_data.flags &= ~NFS_MOUNT_TCP;
break;
case Opt_tcp:
nfs_data.flags |= NFS_MOUNT_TCP;
break;
case Opt_broken_suid:
nfs_data.flags |= NFS_MOUNT_BROKEN_SUID;
break;
default :
return 0;
}
}
if (name[0] && strcmp(name, "default"))
strlcpy(buf, name, NFS_MAXPATHLEN);
return 1;
}
/*
* Prepare the NFS data structure and parse all options.
*/
......
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