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Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/f2fs.h4
-rw-r--r--fs/f2fs/super.c85
-rw-r--r--fs/f2fs/sysfs.c4
3 files changed, 67 insertions, 26 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index ba470d5687fe..157eec348970 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -138,7 +138,7 @@ struct f2fs_mount_info {
int fsync_mode; /* fsync policy */
int fs_mode; /* fs mode: LFS or ADAPTIVE */
int bggc_mode; /* bggc mode: off, on or sync */
- bool test_dummy_encryption; /* test dummy encryption */
+ struct fscrypt_dummy_context dummy_enc_ctx; /* test dummy encryption */
block_t unusable_cap; /* Amount of space allowed to be
* unusable when disabling checkpoint
*/
@@ -1259,7 +1259,7 @@ enum fsync_mode {
#ifdef CONFIG_FS_ENCRYPTION
#define DUMMY_ENCRYPTION_ENABLED(sbi) \
- (unlikely(F2FS_OPTION(sbi).test_dummy_encryption))
+ (unlikely(F2FS_OPTION(sbi).dummy_enc_ctx.ctx != NULL))
#else
#define DUMMY_ENCRYPTION_ENABLED(sbi) (0)
#endif
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index f2dfc21c6abb..8a9955902d84 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -202,6 +202,7 @@ static match_table_t f2fs_tokens = {
{Opt_whint, "whint_mode=%s"},
{Opt_alloc, "alloc_mode=%s"},
{Opt_fsync, "fsync_mode=%s"},
+ {Opt_test_dummy_encryption, "test_dummy_encryption=%s"},
{Opt_test_dummy_encryption, "test_dummy_encryption"},
{Opt_checkpoint_disable, "checkpoint=disable"},
{Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
@@ -394,7 +395,52 @@ static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
}
#endif
-static int parse_options(struct super_block *sb, char *options)
+static int f2fs_set_test_dummy_encryption(struct super_block *sb,
+ const char *opt,
+ const substring_t *arg,
+ bool is_remount)
+{
+ struct f2fs_sb_info *sbi = F2FS_SB(sb);
+#ifdef CONFIG_FS_ENCRYPTION
+ int err;
+
+ if (!f2fs_sb_has_encrypt(sbi)) {
+ f2fs_err(sbi, "Encrypt feature is off");
+ return -EINVAL;
+ }
+
+ /*
+ * This mount option is just for testing, and it's not worthwhile to
+ * implement the extra complexity (e.g. RCU protection) that would be
+ * needed to allow it to be set or changed during remount. We do allow
+ * it to be specified during remount, but only if there is no change.
+ */
+ if (is_remount && !F2FS_OPTION(sbi).dummy_enc_ctx.ctx) {
+ f2fs_warn(sbi, "Can't set test_dummy_encryption on remount");
+ return -EINVAL;
+ }
+ err = fscrypt_set_test_dummy_encryption(
+ sb, arg, &F2FS_OPTION(sbi).dummy_enc_ctx);
+ if (err) {
+ if (err == -EEXIST)
+ f2fs_warn(sbi,
+ "Can't change test_dummy_encryption on remount");
+ else if (err == -EINVAL)
+ f2fs_warn(sbi, "Value of option \"%s\" is unrecognized",
+ opt);
+ else
+ f2fs_warn(sbi, "Error processing option \"%s\" [%d]",
+ opt, err);
+ return -EINVAL;
+ }
+ f2fs_warn(sbi, "Test dummy encryption mode enabled");
+#else
+ f2fs_warn(sbi, "Test dummy encryption mount option ignored");
+#endif
+ return 0;
+}
+
+static int parse_options(struct super_block *sb, char *options, bool is_remount)
{
struct f2fs_sb_info *sbi = F2FS_SB(sb);
substring_t args[MAX_OPT_ARGS];
@@ -403,9 +449,7 @@ static int parse_options(struct super_block *sb, char *options)
int arg = 0, ext_cnt;
kuid_t uid;
kgid_t gid;
-#ifdef CONFIG_QUOTA
int ret;
-#endif
if (!options)
return 0;
@@ -778,17 +822,10 @@ static int parse_options(struct super_block *sb, char *options)
kvfree(name);
break;
case Opt_test_dummy_encryption:
-#ifdef CONFIG_FS_ENCRYPTION
- if (!f2fs_sb_has_encrypt(sbi)) {
- f2fs_err(sbi, "Encrypt feature is off");
- return -EINVAL;
- }
-
- F2FS_OPTION(sbi).test_dummy_encryption = true;
- f2fs_info(sbi, "Test dummy encryption mode enabled");
-#else
- f2fs_info(sbi, "Test dummy encryption mount option ignored");
-#endif
+ ret = f2fs_set_test_dummy_encryption(sb, p, &args[0],
+ is_remount);
+ if (ret)
+ return ret;
break;
case Opt_checkpoint_disable_cap_perc:
if (args->from && match_int(args, &arg))
@@ -1213,6 +1250,7 @@ static void f2fs_put_super(struct super_block *sb)
for (i = 0; i < MAXQUOTAS; i++)
kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
#endif
+ fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
destroy_percpu_info(sbi);
for (i = 0; i < NR_PAGE_TYPE; i++)
kvfree(sbi->write_io[i]);
@@ -1543,10 +1581,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
seq_printf(seq, ",whint_mode=%s", "user-based");
else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
seq_printf(seq, ",whint_mode=%s", "fs-based");
-#ifdef CONFIG_FS_ENCRYPTION
- if (F2FS_OPTION(sbi).test_dummy_encryption)
- seq_puts(seq, ",test_dummy_encryption");
-#endif
+
+ fscrypt_show_test_dummy_encryption(seq, ',', sbi->sb);
if (F2FS_OPTION(sbi).alloc_mode == ALLOC_MODE_DEFAULT)
seq_printf(seq, ",alloc_mode=%s", "default");
@@ -1575,7 +1611,6 @@ static void default_options(struct f2fs_sb_info *sbi)
F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF;
F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT;
F2FS_OPTION(sbi).fsync_mode = FSYNC_MODE_POSIX;
- F2FS_OPTION(sbi).test_dummy_encryption = false;
F2FS_OPTION(sbi).s_resuid = make_kuid(&init_user_ns, F2FS_DEF_RESUID);
F2FS_OPTION(sbi).s_resgid = make_kgid(&init_user_ns, F2FS_DEF_RESGID);
F2FS_OPTION(sbi).compress_algorithm = COMPRESS_LZ4;
@@ -1734,7 +1769,7 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
default_options(sbi);
/* parse mount options */
- err = parse_options(sb, data);
+ err = parse_options(sb, data, true);
if (err)
goto restore_opts;
checkpoint_changed =
@@ -2410,9 +2445,10 @@ static int f2fs_set_context(struct inode *inode, const void *ctx, size_t len,
ctx, len, fs_data, XATTR_CREATE);
}
-static bool f2fs_dummy_context(struct inode *inode)
+static const union fscrypt_context *
+f2fs_get_dummy_context(struct super_block *sb)
{
- return DUMMY_ENCRYPTION_ENABLED(F2FS_I_SB(inode));
+ return F2FS_OPTION(F2FS_SB(sb)).dummy_enc_ctx.ctx;
}
static bool f2fs_has_stable_inodes(struct super_block *sb)
@@ -2431,7 +2467,7 @@ static const struct fscrypt_operations f2fs_cryptops = {
.key_prefix = "f2fs:",
.get_context = f2fs_get_context,
.set_context = f2fs_set_context,
- .dummy_context = f2fs_dummy_context,
+ .get_dummy_context = f2fs_get_dummy_context,
.empty_dir = f2fs_empty_dir,
.max_namelen = F2FS_NAME_LEN,
.has_stable_inodes = f2fs_has_stable_inodes,
@@ -3366,7 +3402,7 @@ try_onemore:
goto free_sb_buf;
}
- err = parse_options(sb, options);
+ err = parse_options(sb, options, false);
if (err)
goto free_options;
@@ -3769,6 +3805,7 @@ free_options:
for (i = 0; i < MAXQUOTAS; i++)
kvfree(F2FS_OPTION(sbi).s_qf_names[i]);
#endif
+ fscrypt_free_dummy_context(&F2FS_OPTION(sbi).dummy_enc_ctx);
kvfree(options);
free_sb_buf:
kvfree(raw_super);
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index e3bbbef9b4f0..3162f46b3c9b 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -446,6 +446,7 @@ enum feat_id {
FEAT_SB_CHECKSUM,
FEAT_CASEFOLD,
FEAT_COMPRESSION,
+ FEAT_TEST_DUMMY_ENCRYPTION_V2,
};
static ssize_t f2fs_feature_show(struct f2fs_attr *a,
@@ -466,6 +467,7 @@ static ssize_t f2fs_feature_show(struct f2fs_attr *a,
case FEAT_SB_CHECKSUM:
case FEAT_CASEFOLD:
case FEAT_COMPRESSION:
+ case FEAT_TEST_DUMMY_ENCRYPTION_V2:
return sprintf(buf, "supported\n");
}
return 0;
@@ -563,6 +565,7 @@ F2FS_GENERAL_RO_ATTR(avg_vblocks);
#ifdef CONFIG_FS_ENCRYPTION
F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
+F2FS_FEATURE_RO_ATTR(test_dummy_encryption_v2, FEAT_TEST_DUMMY_ENCRYPTION_V2);
#endif
#ifdef CONFIG_BLK_DEV_ZONED
F2FS_FEATURE_RO_ATTR(block_zoned, FEAT_BLKZONED);
@@ -647,6 +650,7 @@ ATTRIBUTE_GROUPS(f2fs);
static struct attribute *f2fs_feat_attrs[] = {
#ifdef CONFIG_FS_ENCRYPTION
ATTR_LIST(encryption),
+ ATTR_LIST(test_dummy_encryption_v2),
#endif
#ifdef CONFIG_BLK_DEV_ZONED
ATTR_LIST(block_zoned),
generated by cgit v1.2.3-58-ga151 (git 2.39.0) at 2024-12-01 19:48:57 +0000