diff options
| -rw-r--r-- | fs/efivarfs/super.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index 77240953a92e..869537f1a550 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -15,6 +15,7 @@ #include <linux/slab.h> #include <linux/magic.h> #include <linux/statfs.h> +#include <linux/printk.h> #include "internal.h" @@ -333,9 +334,20 @@ static int efivarfs_get_tree(struct fs_context *fc) return get_tree_single(fc, efivarfs_fill_super); } +static int efivarfs_reconfigure(struct fs_context *fc) +{ + if (!efivar_supports_writes() && !(fc->sb_flags & SB_RDONLY)) { + pr_err("Firmware does not support SetVariableRT. Can not remount with rw\n"); + return -EINVAL; + } + + return 0; +} + static const struct fs_context_operations efivarfs_context_ops = { .get_tree = efivarfs_get_tree, .parse_param = efivarfs_parse_param, + .reconfigure = efivarfs_reconfigure, }; static int efivarfs_init_fs_context(struct fs_context *fc) |