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-rw-r--r--fs/jffs2/super.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index f9916f312bd8..66d44560f75d 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -105,6 +105,8 @@ static int jffs2_show_options(struct seq_file *s, struct dentry *root)
if (opts->override_compr)
seq_printf(s, ",compr=%s", jffs2_compr_name(opts->compr));
+ if (opts->rp_size)
+ seq_printf(s, ",rp_size=%u", opts->rp_size / 1024);
return 0;
}
@@ -171,15 +173,18 @@ static const struct export_operations jffs2_export_ops = {
* JFFS2 mount options.
*
* Opt_override_compr: override default compressor
+ * Opt_rp_size: size of reserved pool in KiB
* Opt_err: just end of array marker
*/
enum {
Opt_override_compr,
+ Opt_rp_size,
Opt_err,
};
static const match_table_t tokens = {
{Opt_override_compr, "compr=%s"},
+ {Opt_rp_size, "rp_size=%u"},
{Opt_err, NULL},
};
@@ -187,6 +192,7 @@ static int jffs2_parse_options(struct jffs2_sb_info *c, char *data)
{
substring_t args[MAX_OPT_ARGS];
char *p, *name;
+ unsigned int opt;
if (!data)
return 0;
@@ -224,6 +230,17 @@ static int jffs2_parse_options(struct jffs2_sb_info *c, char *data)
kfree(name);
c->mount_opts.override_compr = true;
break;
+ case Opt_rp_size:
+ if (match_int(&args[0], &opt))
+ return -EINVAL;
+ opt *= 1024;
+ if (opt > c->mtd->size) {
+ pr_warn("Too large reserve pool specified, max "
+ "is %llu KB\n", c->mtd->size / 1024);
+ return -EINVAL;
+ }
+ c->mount_opts.rp_size = opt;
+ break;
default:
pr_err("Error: unrecognized mount option '%s' or missing value\n",
p);