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-rw-r--r--fs/nfs/super.c157
1 files changed, 61 insertions, 96 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 0b72357cdc41..a2b2805caf9d 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -942,11 +942,6 @@ static int nfs_parse_security_flavors(char *value,
return 1;
}
-static void nfs_parse_invalid_value(const char *option)
-{
- dfprintk(MOUNT, "NFS: bad value specified for %s option\n", option);
-}
-
/*
* Error-check and convert a string of mount options from user space into
* a data structure. The whole mount string is processed; bad options are
@@ -957,7 +952,7 @@ static int nfs_parse_mount_options(char *raw,
struct nfs_parsed_mount_data *mnt)
{
char *p, *string, *secdata;
- int rc, sloppy = 0, errors = 0;
+ int rc, sloppy = 0, invalid_option = 0;
if (!raw) {
dfprintk(MOUNT, "NFS: mount options string was NULL.\n");
@@ -1091,113 +1086,82 @@ static int nfs_parse_mount_options(char *raw,
*/
case Opt_port:
if (match_int(args, &option) ||
- option < 0 || option > USHORT_MAX) {
- errors++;
- nfs_parse_invalid_value("port");
- } else
- mnt->nfs_server.port = option;
+ option < 0 || option > USHORT_MAX)
+ goto out_invalid_value;
+ mnt->nfs_server.port = option;
break;
case Opt_rsize:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("rsize");
- } else
- mnt->rsize = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->rsize = option;
break;
case Opt_wsize:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("wsize");
- } else
- mnt->wsize = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->wsize = option;
break;
case Opt_bsize:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("bsize");
- } else
- mnt->bsize = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->bsize = option;
break;
case Opt_timeo:
- if (match_int(args, &option) || option <= 0) {
- errors++;
- nfs_parse_invalid_value("timeo");
- } else
- mnt->timeo = option;
+ if (match_int(args, &option) || option <= 0)
+ goto out_invalid_value;
+ mnt->timeo = option;
break;
case Opt_retrans:
- if (match_int(args, &option) || option <= 0) {
- errors++;
- nfs_parse_invalid_value("retrans");
- } else
- mnt->retrans = option;
+ if (match_int(args, &option) || option <= 0)
+ goto out_invalid_value;
+ mnt->retrans = option;
break;
case Opt_acregmin:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("acregmin");
- } else
- mnt->acregmin = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->acregmin = option;
break;
case Opt_acregmax:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("acregmax");
- } else
- mnt->acregmax = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->acregmax = option;
break;
case Opt_acdirmin:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("acdirmin");
- } else
- mnt->acdirmin = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->acdirmin = option;
break;
case Opt_acdirmax:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("acdirmax");
- } else
- mnt->acdirmax = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->acdirmax = option;
break;
case Opt_actimeo:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("actimeo");
- } else
- mnt->acregmin = mnt->acregmax =
- mnt->acdirmin = mnt->acdirmax = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->acregmin = mnt->acregmax =
+ mnt->acdirmin = mnt->acdirmax = option;
break;
case Opt_namelen:
- if (match_int(args, &option) || option < 0) {
- errors++;
- nfs_parse_invalid_value("namlen");
- } else
- mnt->namlen = option;
+ if (match_int(args, &option) || option < 0)
+ goto out_invalid_value;
+ mnt->namlen = option;
break;
case Opt_mountport:
if (match_int(args, &option) ||
- option < 0 || option > USHORT_MAX) {
- errors++;
- nfs_parse_invalid_value("mountport");
- } else
- mnt->mount_server.port = option;
+ option < 0 || option > USHORT_MAX)
+ goto out_invalid_value;
+ mnt->mount_server.port = option;
break;
case Opt_mountvers:
if (match_int(args, &option) ||
option < NFS_MNT_VERSION ||
- option > NFS_MNT3_VERSION) {
- errors++;
- nfs_parse_invalid_value("mountvers");
- } else
- mnt->mount_server.version = option;
+ option > NFS_MNT3_VERSION)
+ goto out_invalid_value;
+ mnt->mount_server.version = option;
break;
case Opt_nfsvers:
- if (match_int(args, &option)) {
- errors++;
- nfs_parse_invalid_value("nfsvers");
- break;
- }
+ if (match_int(args, &option))
+ goto out_invalid_value;
switch (option) {
case NFS2_VERSION:
mnt->flags &= ~NFS_MOUNT_VER3;
@@ -1206,8 +1170,7 @@ static int nfs_parse_mount_options(char *raw,
mnt->flags |= NFS_MOUNT_VER3;
break;
default:
- errors++;
- nfs_parse_invalid_value("nfsvers");
+ goto out_invalid_value;
}
break;
@@ -1221,9 +1184,9 @@ static int nfs_parse_mount_options(char *raw,
rc = nfs_parse_security_flavors(string, mnt);
kfree(string);
if (!rc) {
- errors++;
dfprintk(MOUNT, "NFS: unrecognized "
"security flavor\n");
+ return 0;
}
break;
case Opt_proto:
@@ -1237,23 +1200,25 @@ static int nfs_parse_mount_options(char *raw,
case Opt_xprt_udp:
mnt->flags &= ~NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_UDP;
+ kfree(string);
break;
case Opt_xprt_tcp:
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_TCP;
+ kfree(string);
break;
case Opt_xprt_rdma:
/* vector side protocols to TCP */
mnt->flags |= NFS_MOUNT_TCP;
mnt->nfs_server.protocol = XPRT_TRANSPORT_RDMA;
xprt_load_transport(string);
+ kfree(string);
break;
default:
- errors++;
dfprintk(MOUNT, "NFS: unrecognized "
"transport protocol\n");
+ return 0;
}
- kfree(string);
break;
case Opt_mountproto:
string = match_strdup(args);
@@ -1272,9 +1237,9 @@ static int nfs_parse_mount_options(char *raw,
break;
case Opt_xprt_rdma: /* not used for side protocols */
default:
- errors++;
dfprintk(MOUNT, "NFS: unrecognized "
"transport protocol\n");
+ return 0;
}
break;
case Opt_addr:
@@ -1330,9 +1295,9 @@ static int nfs_parse_mount_options(char *raw,
mnt->flags |= NFS_MOUNT_LOOKUP_CACHE_NONEG|NFS_MOUNT_LOOKUP_CACHE_NONE;
break;
default:
- errors++;
dfprintk(MOUNT, "NFS: invalid "
"lookupcache argument\n");
+ return 0;
};
break;
@@ -1350,20 +1315,20 @@ static int nfs_parse_mount_options(char *raw,
break;
default:
- errors++;
+ invalid_option = 1;
dfprintk(MOUNT, "NFS: unrecognized mount option "
"'%s'\n", p);
}
}
- if (errors > 0) {
- dfprintk(MOUNT, "NFS: parsing encountered %d error%s\n",
- errors, (errors == 1 ? "" : "s"));
- if (!sloppy)
- return 0;
- }
+ if (!sloppy && invalid_option)
+ return 0;
+
return 1;
+out_invalid_value:
+ printk(KERN_INFO "NFS: bad mount option value specified: %s \n", p);
+ return 0;
out_nomem:
printk(KERN_INFO "NFS: not enough memory to parse option\n");
return 0;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.