diff options
Diffstat (limited to 'fs/efivarfs/super.c')
| -rw-r--r-- | fs/efivarfs/super.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c index 6780fc81cc11..77c7615bba5e 100644 --- a/fs/efivarfs/super.c +++ b/fs/efivarfs/super.c @@ -13,6 +13,7 @@ #include <linux/ucs2_string.h> #include <linux/slab.h> #include <linux/magic.h> +#include <linux/printk.h> #include "internal.h" @@ -226,8 +227,19 @@ 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, + .reconfigure = efivarfs_reconfigure, }; static int efivarfs_init_fs_context(struct fs_context *fc) @@ -238,10 +250,13 @@ static int efivarfs_init_fs_context(struct fs_context *fc) static void efivarfs_kill_sb(struct super_block *sb) { + struct efivarfs_fs_info *sfi = sb->s_fs_info; + kill_litter_super(sb); /* Remove all entries and destroy */ efivar_entry_iter(efivarfs_destroy, &efivarfs_list, NULL); + kfree(sfi); } static struct file_system_type efivarfs_type = { |