On 04/23, Eric Sandeen wrote:
> From: Hongbo Li <[email protected]>
>
> The new mount api separates option parsing and super block setup
> into two distinct steps and so we need to separate the options
> parsing out of the parse_options().
>
> In order to achieve this, here we handle the mount options with
> three steps:
> - Firstly, we move sb/sbi out of handle_mount_opt.
> As the former patch introduced f2fs_fs_context, so we record
> the changed mount options in this context. In handle_mount_opt,
> sb/sbi is null, so we should move all relative code out of
> handle_mount_opt (thus, some check case which use sb/sbi should
> move out).
> - Secondly, we introduce the some check helpers to keep the option
> consistent.
> During filling superblock period, sb/sbi are ready. So we check
> the f2fs_fs_context which holds the mount options base on sb/sbi.
> - Thirdly, we apply the new mount options to sb/sbi.
> After checking the f2fs_fs_context, all changed on mount options
> are valid. So we can apply them to sb/sbi directly.
>
> After do these, option parsing and super block setting have been
> decoupled. Also it should have retained the original execution
> flow.
>
> Signed-off-by: Hongbo Li <[email protected]>
> [sandeen: forward port, minor fixes and updates]
> Signed-off-by: Eric Sandeen <[email protected]>
> ---
> fs/f2fs/super.c | 693 +++++++++++++++++++++++++++++++++++-------------
> 1 file changed, 510 insertions(+), 183 deletions(-)
>
> diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
> index 15befeb45c94..149134775870 100644
> --- a/fs/f2fs/super.c
> +++ b/fs/f2fs/super.c
> @@ -360,6 +360,12 @@ static inline void ctx_clear_opt(struct f2fs_fs_context
> *ctx,
> ctx->opt_mask |= flag;
> }
>
> +static inline bool ctx_test_opt(struct f2fs_fs_context *ctx,
> + unsigned int flag)
> +{
> + return ctx->info.opt & flag;
> +}
> +
> static inline void ctx_set_flags(struct f2fs_fs_context *ctx,
> unsigned int flag)
> {
> @@ -533,51 +539,6 @@ static int f2fs_unnote_qf_name(struct fs_context *fc,
> int qtype)
> ctx->qname_mask |= 1 << qtype;
> return 0;
> }
> -
> -static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
> -{
> - /*
> - * We do the test below only for project quotas. 'usrquota' and
> - * 'grpquota' mount options are allowed even without quota feature
> - * to support legacy quotas in quota files.
> - */
> - if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
> - f2fs_err(sbi, "Project quota feature not enabled. Cannot enable
> project quota enforcement.");
> - return -1;
> - }
> - if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
> - F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
> - F2FS_OPTION(sbi).s_qf_names[PRJQUOTA]) {
> - if (test_opt(sbi, USRQUOTA) &&
> - F2FS_OPTION(sbi).s_qf_names[USRQUOTA])
> - clear_opt(sbi, USRQUOTA);
> -
> - if (test_opt(sbi, GRPQUOTA) &&
> - F2FS_OPTION(sbi).s_qf_names[GRPQUOTA])
> - clear_opt(sbi, GRPQUOTA);
> -
> - if (test_opt(sbi, PRJQUOTA) &&
> - F2FS_OPTION(sbi).s_qf_names[PRJQUOTA])
> - clear_opt(sbi, PRJQUOTA);
> -
> - if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
> - test_opt(sbi, PRJQUOTA)) {
> - f2fs_err(sbi, "old and new quota format mixing");
> - return -1;
> - }
> -
> - if (!F2FS_OPTION(sbi).s_jquota_fmt) {
> - f2fs_err(sbi, "journaled quota format not specified");
> - return -1;
> - }
> - }
> -
> - if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
> - f2fs_info(sbi, "QUOTA feature is enabled, so ignore
> jquota_fmt");
> - F2FS_OPTION(sbi).s_jquota_fmt = 0;
> - }
> - return 0;
> -}
> #endif
>
> static int f2fs_parse_test_dummy_encryption(const struct fs_parameter *param,
> @@ -636,28 +597,28 @@ static bool is_compress_extension_exist(struct
> f2fs_mount_info *info,
> * extension will be treated as special cases and will not be compressed.
> * 3. Don't allow the non-compress extension specifies all files.
> */
> -static int f2fs_test_compress_extension(struct f2fs_sb_info *sbi)
> +static int f2fs_test_compress_extension(unsigned char
> (*noext)[F2FS_EXTENSION_LEN],
> + int noext_cnt,
> + unsigned char
> (*ext)[F2FS_EXTENSION_LEN],
> + int ext_cnt)
> {
> - unsigned char (*ext)[F2FS_EXTENSION_LEN];
> - unsigned char (*noext)[F2FS_EXTENSION_LEN];
> - int ext_cnt, noext_cnt, index = 0, no_index = 0;
> -
> - ext = F2FS_OPTION(sbi).extensions;
> - ext_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
> - noext = F2FS_OPTION(sbi).noextensions;
> - noext_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
> + int index = 0, no_index = 0;
>
> if (!noext_cnt)
> return 0;
>
> for (no_index = 0; no_index < noext_cnt; no_index++) {
> + if (strlen(noext[no_index]) == 0)
> + continue;
> if (!strcasecmp("*", noext[no_index])) {
> - f2fs_info(sbi, "Don't allow the nocompress extension
> specifies all files");
> + f2fs_info(NULL, "Don't allow the nocompress extension
> specifies all files");
> return -EINVAL;
> }
> for (index = 0; index < ext_cnt; index++) {
> + if (strlen(ext[index]) == 0)
> + continue;
> if (!strcasecmp(ext[index], noext[no_index])) {
> - f2fs_info(sbi, "Don't allow the same extension
> %s appear in both compress and nocompress extension",
> + f2fs_info(NULL, "Don't allow the same extension
> %s appear in both compress and nocompress extension",
> ext[index]);
> return -EINVAL;
> }
> @@ -749,7 +710,6 @@ static int f2fs_set_zstd_level(struct f2fs_fs_context
> *ctx, const char *str)
> static int handle_mount_opt(struct fs_context *fc, struct fs_parameter
> *param)
> {
> struct f2fs_fs_context *ctx = fc->fs_private;
> - struct f2fs_sb_info *sbi = fc->s_fs_info;
> #ifdef CONFIG_F2FS_FS_COMPRESSION
> unsigned char (*ext)[F2FS_EXTENSION_LEN];
> unsigned char (*noext)[F2FS_EXTENSION_LEN];
> @@ -758,15 +718,12 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> #endif
> substring_t args[MAX_OPT_ARGS];
> struct fs_parse_result result;
> - int is_remount;
> int token, ret, arg;
>
> token = fs_parse(fc, f2fs_param_specs, param, &result);
> if (token < 0)
> return token;
>
> - is_remount = fc->purpose == FS_CONTEXT_FOR_RECONFIGURE;
> -
> switch (token) {
> case Opt_gc_background:
> F2FS_CTX_INFO(ctx).bggc_mode = result.uint_32;
> @@ -780,19 +737,10 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx_set_opt(ctx, F2FS_MOUNT_NORECOVERY);
> break;
> case Opt_discard:
> - if (result.negated) {
> - if (f2fs_hw_should_discard(sbi)) {
> - f2fs_warn(NULL, "discard is required for zoned
> block devices");
> - return -EINVAL;
> - }
> + if (result.negated)
> ctx_clear_opt(ctx, F2FS_MOUNT_DISCARD);
> - } else {
> - if (!f2fs_hw_support_discard(sbi)) {
> - f2fs_warn(NULL, "device does not support
> discard");
> - break;
> - }
> + else
> ctx_set_opt(ctx, F2FS_MOUNT_DISCARD);
> - }
> break;
> case Opt_noheap:
> case Opt_heap:
> @@ -812,6 +760,12 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx_set_opt(ctx, F2FS_MOUNT_INLINE_XATTR);
> break;
> case Opt_inline_xattr_size:
> + if (result.int_32 < MIN_INLINE_XATTR_SIZE ||
> + result.int_32 > MAX_INLINE_XATTR_SIZE) {
> + f2fs_err(NULL, "inline xattr size is out of range: %zu
> ~ %zu",
I fixed this to %lu ~ %lu to avoid build warning.
> + MIN_INLINE_XATTR_SIZE, MAX_INLINE_XATTR_SIZE);
> + return -EINVAL;
> + }
> ctx_set_opt(ctx, F2FS_MOUNT_INLINE_XATTR_SIZE);
> F2FS_CTX_INFO(ctx).inline_xattr_size = result.int_32;
> ctx->spec_mask |= F2FS_SPEC_inline_xattr_size;
> @@ -873,27 +827,18 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx_set_opt(ctx, F2FS_MOUNT_FASTBOOT);
> break;
> case Opt_extent_cache:
> - if (result.negated) {
> - if (f2fs_sb_has_device_alias(sbi)) {
> - f2fs_err(sbi, "device aliasing requires extent
> cache");
> - return -EINVAL;
> - }
> + if (result.negated)
> ctx_clear_opt(ctx, F2FS_MOUNT_READ_EXTENT_CACHE);
> - } else
> + else
> ctx_set_opt(ctx, F2FS_MOUNT_READ_EXTENT_CACHE);
> break;
> case Opt_data_flush:
> ctx_set_opt(ctx, F2FS_MOUNT_DATA_FLUSH);
> break;
> case Opt_reserve_root:
> - if (test_opt(sbi, RESERVE_ROOT)) {
> - f2fs_info(NULL, "Preserve previous reserve_root=%u",
> - F2FS_OPTION(sbi).root_reserved_blocks);
> - } else {
> - ctx_set_opt(ctx, F2FS_MOUNT_RESERVE_ROOT);
> - F2FS_CTX_INFO(ctx).root_reserved_blocks =
> result.uint_32;
> - ctx->spec_mask |= F2FS_SPEC_reserve_root;
> - }
> + ctx_set_opt(ctx, F2FS_MOUNT_RESERVE_ROOT);
> + F2FS_CTX_INFO(ctx).root_reserved_blocks = result.uint_32;
> + ctx->spec_mask |= F2FS_SPEC_reserve_root;
> break;
> case Opt_resuid:
> F2FS_CTX_INFO(ctx).s_resuid = result.uid;
> @@ -909,7 +854,7 @@ static int handle_mount_opt(struct fs_context *fc, struct
> fs_parameter *param)
> break;
> #ifdef CONFIG_F2FS_FAULT_INJECTION
> case Opt_fault_injection:
> - if (f2fs_build_fault_attr(sbi, result.int_32, 0, FAULT_RATE))
> + if (result.int_32 > INT_MAX)
> return -EINVAL;
> F2FS_CTX_INFO(ctx).fault_info.inject_rate = result.int_32;
> ctx->spec_mask |= F2FS_SPEC_fault_injection;
> @@ -917,7 +862,7 @@ static int handle_mount_opt(struct fs_context *fc, struct
> fs_parameter *param)
> break;
>
> case Opt_fault_type:
> - if (f2fs_build_fault_attr(sbi, 0, result.int_32, FAULT_TYPE))
> + if (result.uint_32 > BIT(FAULT_MAX))
> return -EINVAL;
> F2FS_CTX_INFO(ctx).fault_info.inject_type = result.uint_32;
> ctx->spec_mask |= F2FS_SPEC_fault_type;
> @@ -1051,10 +996,6 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> break;
> #ifdef CONFIG_F2FS_FS_COMPRESSION
> case Opt_compress_algorithm:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> name = param->string;
> if (!strcmp(name, "lzo")) {
> #ifdef CONFIG_F2FS_FS_LZO
> @@ -1098,10 +1039,6 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> return -EINVAL;
> break;
> case Opt_compress_log_size:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> if (result.uint_32 < MIN_COMPRESS_LOG_SIZE ||
> result.uint_32 > MAX_COMPRESS_LOG_SIZE) {
> f2fs_err(NULL,
> @@ -1112,10 +1049,6 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx->spec_mask |= F2FS_SPEC_compress_log_size;
> break;
> case Opt_compress_extension:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> name = param->string;
> ext = F2FS_CTX_INFO(ctx).extensions;
> ext_cnt = F2FS_CTX_INFO(ctx).compress_ext_cnt;
> @@ -1136,10 +1069,6 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx->spec_mask |= F2FS_SPEC_compress_extension;
> break;
> case Opt_nocompress_extension:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> name = param->string;
> noext = F2FS_CTX_INFO(ctx).noextensions;
> noext_cnt = F2FS_CTX_INFO(ctx).nocompress_ext_cnt;
> @@ -1160,26 +1089,14 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> ctx->spec_mask |= F2FS_SPEC_nocompress_extension;
> break;
> case Opt_compress_chksum:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> F2FS_CTX_INFO(ctx).compress_chksum = true;
> ctx->spec_mask |= F2FS_SPEC_compress_chksum;
> break;
> case Opt_compress_mode:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> F2FS_CTX_INFO(ctx).compress_mode = result.uint_32;
> ctx->spec_mask |= F2FS_SPEC_compress_mode;
> break;
> case Opt_compress_cache:
> - if (!f2fs_sb_has_compression(sbi)) {
> - f2fs_info(NULL, "Image doesn't support compression");
> - break;
> - }
> ctx_set_opt(ctx, F2FS_MOUNT_COMPRESS_CACHE);
> break;
> #else
> @@ -1224,24 +1141,15 @@ static int handle_mount_opt(struct fs_context *fc,
> struct fs_parameter *param)
> return 0;
> }
>
> -static int parse_options(struct f2fs_sb_info *sbi, char *options, bool
> is_remount)
> +static int parse_options(struct fs_context *fc, char *options)
> {
> struct fs_parameter param;
> - struct fs_context fc;
> - struct f2fs_fs_context ctx;
> char *key;
> int ret;
>
> if (!options)
> return 0;
>
> - memset(&fc, 0, sizeof(fc));
> - fc.s_fs_info = sbi;
> - fc.fs_private = &ctx;
> -
> - if (is_remount)
> - fc.purpose = FS_CONTEXT_FOR_RECONFIGURE;
> -
> while ((key = strsep(&options, ",")) != NULL) {
> if (*key) {
> size_t v_len = 0;
> @@ -1265,7 +1173,7 @@ static int parse_options(struct f2fs_sb_info *sbi, char
> *options, bool is_remoun
> param.key = key;
> param.size = v_len;
>
> - ret = handle_mount_opt(&fc, ¶m);
> + ret = handle_mount_opt(fc, ¶m);
> kfree(param.string);
> if (ret < 0)
> return ret;
> @@ -1274,24 +1182,293 @@ static int parse_options(struct f2fs_sb_info *sbi,
> char *options, bool is_remoun
> return 0;
> }
>
> -static int f2fs_validate_options(struct f2fs_sb_info *sbi)
> +/*
> + * Check quota settings consistency.
> + */
> +static int f2fs_check_quota_consistency(struct fs_context *fc,
> + struct super_block *sb)
> {
> -#ifdef CONFIG_QUOTA
> - if (f2fs_check_quota_options(sbi))
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> + #ifdef CONFIG_QUOTA
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + bool quota_feature = f2fs_sb_has_quota_ino(sbi);
> + bool quota_turnon = sb_any_quota_loaded(sb);
> + char *old_qname, *new_qname;
> + bool usr_qf_name, grp_qf_name, prj_qf_name, usrquota, grpquota,
> prjquota;
> + int i;
> +
> + /*
> + * We do the test below only for project quotas. 'usrquota' and
> + * 'grpquota' mount options are allowed even without quota feature
> + * to support legacy quotas in quota files.
> + */
> + if (ctx_test_opt(ctx, F2FS_MOUNT_PRJQUOTA) &&
> + !f2fs_sb_has_project_quota(sbi)) {
> + f2fs_err(sbi, "Project quota feature not enabled. Cannot enable
> project quota enforcement.");
> return -EINVAL;
> + }
> +
> + if (ctx->qname_mask) {
> + for (i = 0; i < MAXQUOTAS; i++) {
> + if (!(ctx->qname_mask & (1 << i)))
> + continue;
> +
> + old_qname = F2FS_OPTION(sbi).s_qf_names[i];
> + new_qname = F2FS_CTX_INFO(ctx).s_qf_names[i];
> + if (quota_turnon &&
> + !!old_qname != !!new_qname)
> + goto err_jquota_change;
> +
> + if (old_qname) {
> + if (strcmp(old_qname, new_qname) == 0) {
> + ctx->qname_mask &= ~(1 << i);
> + continue;
> + }
> + goto err_jquota_specified;
> + }
> +
> + if (quota_feature) {
> + f2fs_info(sbi, "QUOTA feature is enabled, so
> ignore qf_name");
> + ctx->qname_mask &= ~(1 << i);
> + kfree(F2FS_CTX_INFO(ctx).s_qf_names[i]);
> + F2FS_CTX_INFO(ctx).s_qf_names[i] = NULL;
> + }
> + }
> + }
> +
> + /* Make sure we don't mix old and new quota format */
> + usr_qf_name = F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
> + F2FS_CTX_INFO(ctx).s_qf_names[USRQUOTA];
> + grp_qf_name = F2FS_OPTION(sbi).s_qf_names[GRPQUOTA] ||
> + F2FS_CTX_INFO(ctx).s_qf_names[GRPQUOTA];
> + prj_qf_name = F2FS_OPTION(sbi).s_qf_names[PRJQUOTA] ||
> + F2FS_CTX_INFO(ctx).s_qf_names[PRJQUOTA];
> + usrquota = test_opt(sbi, USRQUOTA) ||
> + ctx_test_opt(ctx, F2FS_MOUNT_USRQUOTA);
> + grpquota = test_opt(sbi, GRPQUOTA) ||
> + ctx_test_opt(ctx, F2FS_MOUNT_GRPQUOTA);
> + prjquota = test_opt(sbi, PRJQUOTA) ||
> + ctx_test_opt(ctx, F2FS_MOUNT_PRJQUOTA);
> +
> + if (usr_qf_name) {
> + ctx_clear_opt(ctx, F2FS_MOUNT_USRQUOTA);
> + usrquota = false;
> + }
> + if (grp_qf_name) {
> + ctx_clear_opt(ctx, F2FS_MOUNT_GRPQUOTA);
> + grpquota = false;
> + }
> + if (prj_qf_name) {
> + ctx_clear_opt(ctx, F2FS_MOUNT_PRJQUOTA);
> + prjquota = false;
> + }
> + if (usr_qf_name || grp_qf_name || prj_qf_name) {
> + if (grpquota || usrquota || prjquota) {
> + f2fs_err(sbi, "old and new quota format mixing");
> + return -EINVAL;
> + }
> + if (!(ctx->spec_mask & F2FS_SPEC_jqfmt ||
> + F2FS_OPTION(sbi).s_jquota_fmt)) {
> + f2fs_err(sbi, "journaled quota format not specified");
> + return -EINVAL;
> + }
> + }
> + return 0;
> +
> +err_jquota_change:
> + f2fs_err(sbi, "Cannot change journaled quota options when quota turned
> on");
> + return -EINVAL;
> +err_jquota_specified:
> + f2fs_err(sbi, "%s quota file already specified",
> + QTYPE2NAME(i));
> + return -EINVAL;
> +
> #else
> - if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
> - f2fs_info(NULL, "Filesystem with quota feature cannot be
> mounted RDWR without CONFIG_QUOTA");
> + if (f2fs_readonly(sbi->sb))
> + return 0;
> + if (f2fs_sb_has_quota_ino(sbi)) {
> + f2fs_info(sbi, "Filesystem with quota feature cannot be mounted
> RDWR without CONFIG_QUOTA");
> return -EINVAL;
> }
> - if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
> - f2fs_err(NULL, "Filesystem with project quota feature cannot be
> mounted RDWR without CONFIG_QUOTA");
> + if (f2fs_sb_has_project_quota(sbi)) {
> + f2fs_err(sbi, "Filesystem with project quota feature cannot be
> mounted RDWR without CONFIG_QUOTA");
> return -EINVAL;
> }
> +
> + return 0;
> #endif
> +}
> +
> +static int f2fs_check_test_dummy_encryption(struct fs_context *fc,
> + struct super_block *sb)
> +{
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> +
> + if (!fscrypt_is_dummy_policy_set(&F2FS_CTX_INFO(ctx).dummy_enc_policy))
> + return 0;
> +
> + 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 (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE) {
> + if
> (fscrypt_dummy_policies_equal(&F2FS_OPTION(sbi).dummy_enc_policy,
> + &F2FS_CTX_INFO(ctx).dummy_enc_policy))
> + return 0;
> + f2fs_warn(sbi, "Can't set or change test_dummy_encryption on
> remount");
> + return -EINVAL;
> + }
> + return 0;
> +}
> +
> +static inline bool test_compression_spec(unsigned int mask)
> +{
> + return mask & (F2FS_SPEC_compress_algorithm
> + | F2FS_SPEC_compress_log_size
> + | F2FS_SPEC_compress_extension
> + | F2FS_SPEC_nocompress_extension
> + | F2FS_SPEC_compress_chksum
> + | F2FS_SPEC_compress_mode);
> +}
> +
> +static inline void clear_compression_spec(struct f2fs_fs_context *ctx)
> +{
> + ctx->spec_mask &= ~(F2FS_SPEC_compress_algorithm
> + | F2FS_SPEC_compress_log_size
> + | F2FS_SPEC_compress_extension
> + | F2FS_SPEC_nocompress_extension
> + | F2FS_SPEC_compress_chksum
> + | F2FS_SPEC_compress_mode);
> +}
> +
> +static int f2fs_check_compression(struct fs_context *fc,
> + struct super_block *sb)
> +{
> +#ifdef CONFIG_F2FS_FS_COMPRESSION
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> + int i, cnt;
> +
> + if (!f2fs_sb_has_compression(sbi)) {
> + if (test_compression_spec(ctx->opt_mask) ||
> + ctx_test_opt(ctx, F2FS_MOUNT_COMPRESS_CACHE))
> + f2fs_info(sbi, "Image doesn't support compression");
> + clear_compression_spec(ctx);
> + ctx->opt_mask &= ~F2FS_MOUNT_COMPRESS_CACHE;
> + return 0;
> + }
> + if (ctx->spec_mask & F2FS_SPEC_compress_extension) {
> + cnt = F2FS_CTX_INFO(ctx).compress_ext_cnt;
> + for (i = 0; i < F2FS_CTX_INFO(ctx).compress_ext_cnt; i++) {
> + if (is_compress_extension_exist(&F2FS_OPTION(sbi),
> + F2FS_CTX_INFO(ctx).extensions[i],
> true)) {
> + F2FS_CTX_INFO(ctx).extensions[i][0] = '\0';
> + cnt--;
> + }
> + }
> + if (F2FS_OPTION(sbi).compress_ext_cnt + cnt > COMPRESS_EXT_NUM)
> {
> + f2fs_err(sbi, "invalid extension length/number");
> + return -EINVAL;
> + }
> + }
> + if (ctx->spec_mask & F2FS_SPEC_nocompress_extension) {
> + cnt = F2FS_CTX_INFO(ctx).nocompress_ext_cnt;
> + for (i = 0; i < F2FS_CTX_INFO(ctx).nocompress_ext_cnt; i++) {
> + if (is_compress_extension_exist(&F2FS_OPTION(sbi),
> + F2FS_CTX_INFO(ctx).noextensions[i],
> false)) {
> + F2FS_CTX_INFO(ctx).noextensions[i][0] = '\0';
> + cnt--;
> + }
> + }
> + if (F2FS_OPTION(sbi).nocompress_ext_cnt + cnt >
> COMPRESS_EXT_NUM) {
> + f2fs_err(sbi, "invalid noextension length/number");
> + return -EINVAL;
> + }
> + }
> +
> + if (f2fs_test_compress_extension(F2FS_CTX_INFO(ctx).noextensions,
> + F2FS_CTX_INFO(ctx).nocompress_ext_cnt,
> + F2FS_CTX_INFO(ctx).extensions,
> + F2FS_CTX_INFO(ctx).compress_ext_cnt)) {
> + f2fs_err(sbi, "invalid compress or nocompress extension");
> + return -EINVAL;
> + }
> + if (f2fs_test_compress_extension(F2FS_CTX_INFO(ctx).noextensions,
> + F2FS_CTX_INFO(ctx).nocompress_ext_cnt,
> + F2FS_OPTION(sbi).extensions,
> + F2FS_OPTION(sbi).compress_ext_cnt)) {
> + f2fs_err(sbi, "invalid compress or nocompress extension");
> + return -EINVAL;
> + }
> + if (f2fs_test_compress_extension(F2FS_OPTION(sbi).noextensions,
> + F2FS_OPTION(sbi).nocompress_ext_cnt,
> + F2FS_CTX_INFO(ctx).extensions,
> + F2FS_CTX_INFO(ctx).compress_ext_cnt)) {
> + f2fs_err(sbi, "invalid compress or nocompress extension");
> + return -EINVAL;
> + }
> +#endif
> + return 0;
> +}
> +
> +static int f2fs_check_opt_consistency(struct fs_context *fc,
> + struct super_block *sb)
> +{
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> + int err;
> +
> + if (ctx_test_opt(ctx, F2FS_MOUNT_NORECOVERY) && !f2fs_readonly(sb))
> + return -EINVAL;
> +
> + if (f2fs_hw_should_discard(sbi) && (ctx->opt_mask & F2FS_MOUNT_DISCARD)
> + && !ctx_test_opt(ctx, F2FS_MOUNT_DISCARD)) {
> + f2fs_warn(sbi, "discard is required for zoned block devices");
> + return -EINVAL;
> + }
> +
> + if (f2fs_sb_has_device_alias(sbi)) {
> + f2fs_err(sbi, "device aliasing requires extent cache");
> + return -EINVAL;
> + }
> +
> + if (!f2fs_hw_support_discard(sbi) && (ctx->opt_mask &
> F2FS_MOUNT_DISCARD)
> + && ctx_test_opt(ctx, F2FS_MOUNT_DISCARD)) {
> + f2fs_warn(sbi, "device does not support discard");
> + ctx_clear_opt(ctx, F2FS_MOUNT_DISCARD);
> + ctx->opt_mask &= ~F2FS_MOUNT_DISCARD;
> + }
> +
> + if (test_opt(sbi, RESERVE_ROOT) && (ctx->opt_mask &
> F2FS_MOUNT_RESERVE_ROOT)
> + && ctx_test_opt(ctx, F2FS_MOUNT_RESERVE_ROOT)) {
> + f2fs_info(sbi, "Preserve previous reserve_root=%u",
> + F2FS_OPTION(sbi).root_reserved_blocks);
> + ctx_clear_opt(ctx, F2FS_MOUNT_RESERVE_ROOT);
> + ctx->opt_mask &= ~F2FS_MOUNT_RESERVE_ROOT;
> + }
> +
> + err = f2fs_check_test_dummy_encryption(fc, sb);
> + if (err)
> + return err;
> +
> + err = f2fs_check_compression(fc, sb);
> + if (err)
> + return err;
> +
> + err = f2fs_check_quota_consistency(fc, sb);
> + if (err)
> + return err;
>
> if (!IS_ENABLED(CONFIG_UNICODE) && f2fs_sb_has_casefold(sbi)) {
> - f2fs_err(NULL,
> + f2fs_err(sbi,
> "Filesystem with casefold feature cannot be mounted
> without CONFIG_UNICODE");
> return -EINVAL;
> }
> @@ -1303,75 +1480,210 @@ static int f2fs_validate_options(struct f2fs_sb_info
> *sbi)
> */
> if (f2fs_sb_has_blkzoned(sbi)) {
> #ifdef CONFIG_BLK_DEV_ZONED
> - if (F2FS_OPTION(sbi).discard_unit !=
> - DISCARD_UNIT_SECTION) {
> - f2fs_info(NULL, "Zoned block device doesn't need small
> discard, set discard_unit=section by default");
> - F2FS_OPTION(sbi).discard_unit =
> - DISCARD_UNIT_SECTION;
> + if ((ctx->spec_mask & F2FS_SPEC_discard_unit) &&
> + F2FS_CTX_INFO(ctx).discard_unit != DISCARD_UNIT_SECTION) {
> + f2fs_info(sbi, "Zoned block device doesn't need small
> discard, set discard_unit=section by default");
> + F2FS_CTX_INFO(ctx).discard_unit = DISCARD_UNIT_SECTION;
> }
>
> - if (F2FS_OPTION(sbi).fs_mode != FS_MODE_LFS) {
> - f2fs_info(NULL, "Only lfs mode is allowed with zoned
> block device feature");
> + if ((ctx->spec_mask & F2FS_SPEC_mode) &&
> + F2FS_CTX_INFO(ctx).fs_mode != FS_MODE_LFS) {
> + f2fs_info(sbi, "Only lfs mode is allowed with zoned
> block device feature");
> return -EINVAL;
> }
> #else
> - f2fs_err(NULL, "Zoned block device support is not enabled");
> + f2fs_err(sbi, "Zoned block device support is not enabled");
> return -EINVAL;
> #endif
> }
>
> -#ifdef CONFIG_F2FS_FS_COMPRESSION
> - if (f2fs_test_compress_extension(sbi)) {
> - f2fs_err(NULL, "invalid compress or nocompress extension");
> - return -EINVAL;
> - }
> -#endif
> -
> - if (test_opt(sbi, INLINE_XATTR_SIZE)) {
> - int min_size, max_size;
> -
> + if (ctx_test_opt(ctx, F2FS_MOUNT_INLINE_XATTR_SIZE)) {
> if (!f2fs_sb_has_extra_attr(sbi) ||
> !f2fs_sb_has_flexible_inline_xattr(sbi)) {
> - f2fs_err(NULL, "extra_attr or flexible_inline_xattr
> feature is off");
> - return -EINVAL;
> - }
> - if (!test_opt(sbi, INLINE_XATTR)) {
> - f2fs_err(NULL, "inline_xattr_size option should be set
> with inline_xattr option");
> + f2fs_err(sbi, "extra_attr or flexible_inline_xattr
> feature is off");
> return -EINVAL;
> }
> -
> - min_size = MIN_INLINE_XATTR_SIZE;
> - max_size = MAX_INLINE_XATTR_SIZE;
> -
> - if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
> - F2FS_OPTION(sbi).inline_xattr_size > max_size) {
> - f2fs_err(NULL, "inline xattr size is out of range: %d ~
> %d",
> - min_size, max_size);
> + if (!ctx_test_opt(ctx, F2FS_MOUNT_INLINE_XATTR)) {
> + f2fs_err(sbi, "inline_xattr_size option should be set
> with inline_xattr option");
> return -EINVAL;
> }
> }
>
> - if (test_opt(sbi, ATGC) && f2fs_lfs_mode(sbi)) {
> - f2fs_err(NULL, "LFS is not compatible with ATGC");
> + if (ctx_test_opt(ctx, F2FS_MOUNT_ATGC) &&
> + F2FS_CTX_INFO(ctx).fs_mode == FS_MODE_LFS) {
> + f2fs_err(sbi, "LFS is not compatible with ATGC");
> return -EINVAL;
> }
>
> - if (f2fs_is_readonly(sbi) && test_opt(sbi, FLUSH_MERGE)) {
> - f2fs_err(NULL, "FLUSH_MERGE not compatible with readonly mode");
> + if (f2fs_is_readonly(sbi) && ctx_test_opt(ctx, F2FS_MOUNT_FLUSH_MERGE))
> {
> + f2fs_err(sbi, "FLUSH_MERGE not compatible with readonly mode");
> return -EINVAL;
> }
>
> if (f2fs_sb_has_readonly(sbi) && !f2fs_readonly(sbi->sb)) {
> - f2fs_err(NULL, "Allow to mount readonly mode only");
> + f2fs_err(sbi, "Allow to mount readonly mode only");
> return -EROFS;
> }
> + return 0;
> +}
>
> - if (test_opt(sbi, NORECOVERY) && !f2fs_readonly(sbi->sb)) {
> - f2fs_err(sbi, "norecovery requires readonly mount");
> - return -EINVAL;
> +static void f2fs_apply_quota_options(struct fs_context *fc,
> + struct super_block *sb)
> +{
> +#ifdef CONFIG_QUOTA
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> + bool quota_feature = f2fs_sb_has_quota_ino(sbi);
> + char *qname;
> + int i;
> +
> + if (quota_feature)
> + return;
> +
> + for (i = 0; i < MAXQUOTAS; i++) {
> + if (!(ctx->qname_mask & (1 << i)))
> + continue;
> +
> + qname = F2FS_CTX_INFO(ctx).s_qf_names[i];
> + if (qname)
> + set_opt(sbi, QUOTA);
> + F2FS_OPTION(sbi).s_qf_names[i] = qname;
> + F2FS_CTX_INFO(ctx).s_qf_names[i] = NULL;
> }
>
> - return 0;
> + if (ctx->spec_mask & F2FS_SPEC_jqfmt)
> + F2FS_OPTION(sbi).s_jquota_fmt = F2FS_CTX_INFO(ctx).s_jquota_fmt;
> +
> + if (quota_feature && F2FS_OPTION(sbi).s_jquota_fmt) {
> + f2fs_info(sbi, "QUOTA feature is enabled, so ignore
> jquota_fmt");
> + F2FS_OPTION(sbi).s_jquota_fmt = 0;
> + }
> +#endif
> +}
> +
> +static void f2fs_apply_test_dummy_encryption(struct fs_context *fc,
> + struct super_block *sb)
> +{
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> +
> + if (!fscrypt_is_dummy_policy_set(&F2FS_CTX_INFO(ctx).dummy_enc_policy)
> ||
> + /* if already set, it was already verified to be the same */
> + fscrypt_is_dummy_policy_set(&F2FS_OPTION(sbi).dummy_enc_policy))
> + return;
> + F2FS_OPTION(sbi).dummy_enc_policy = F2FS_CTX_INFO(ctx).dummy_enc_policy;
> + memset(&F2FS_CTX_INFO(ctx).dummy_enc_policy, 0,
> + sizeof(F2FS_CTX_INFO(ctx).dummy_enc_policy));
> + f2fs_warn(sbi, "Test dummy encryption mode enabled");
> +}
> +
> +static void f2fs_apply_compression(struct fs_context *fc,
> + struct super_block *sb)
> +{
> +#ifdef CONFIG_F2FS_FS_COMPRESSION
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> + unsigned char (*ctx_ext)[F2FS_EXTENSION_LEN];
> + unsigned char (*sbi_ext)[F2FS_EXTENSION_LEN];
> + int ctx_cnt, sbi_cnt, i;
> +
> + if (ctx->spec_mask & F2FS_SPEC_compress_level)
> + F2FS_OPTION(sbi).compress_level =
> + F2FS_CTX_INFO(ctx).compress_level;
> + if (ctx->spec_mask & F2FS_SPEC_compress_algorithm)
> + F2FS_OPTION(sbi).compress_algorithm =
> + F2FS_CTX_INFO(ctx).compress_algorithm;
> + if (ctx->spec_mask & F2FS_SPEC_compress_log_size)
> + F2FS_OPTION(sbi).compress_log_size =
> + F2FS_CTX_INFO(ctx).compress_log_size;
> + if (ctx->spec_mask & F2FS_SPEC_compress_chksum)
> + F2FS_OPTION(sbi).compress_chksum =
> + F2FS_CTX_INFO(ctx).compress_chksum;
> + if (ctx->spec_mask & F2FS_SPEC_compress_mode)
> + F2FS_OPTION(sbi).compress_mode =
> + F2FS_CTX_INFO(ctx).compress_mode;
> + if (ctx->spec_mask & F2FS_SPEC_compress_extension) {
> + ctx_ext = F2FS_CTX_INFO(ctx).extensions;
> + ctx_cnt = F2FS_CTX_INFO(ctx).compress_ext_cnt;
> + sbi_ext = F2FS_OPTION(sbi).extensions;
> + sbi_cnt = F2FS_OPTION(sbi).compress_ext_cnt;
> + for (i = 0; i < ctx_cnt; i++) {
> + if (strlen(ctx_ext[i]) == 0)
> + continue;
> + strscpy(sbi_ext[sbi_cnt], ctx_ext[i]);
> + sbi_cnt++;
> + }
> + F2FS_OPTION(sbi).compress_ext_cnt = sbi_cnt;
> + }
> + if (ctx->spec_mask & F2FS_SPEC_nocompress_extension) {
> + ctx_ext = F2FS_CTX_INFO(ctx).noextensions;
> + ctx_cnt = F2FS_CTX_INFO(ctx).nocompress_ext_cnt;
> + sbi_ext = F2FS_OPTION(sbi).noextensions;
> + sbi_cnt = F2FS_OPTION(sbi).nocompress_ext_cnt;
> + for (i = 0; i < ctx_cnt; i++) {
> + if (strlen(ctx_ext[i]) == 0)
> + continue;
> + strscpy(sbi_ext[sbi_cnt], ctx_ext[i]);
> + sbi_cnt++;
> + }
> + F2FS_OPTION(sbi).nocompress_ext_cnt = sbi_cnt;
> + }
> +#endif
> +}
> +
> +static void f2fs_apply_options(struct fs_context *fc, struct super_block *sb)
> +{
> + struct f2fs_fs_context *ctx = fc->fs_private;
> + struct f2fs_sb_info *sbi = F2FS_SB(sb);
> +
> + F2FS_OPTION(sbi).opt &= ~ctx->opt_mask;
> + F2FS_OPTION(sbi).opt |= F2FS_CTX_INFO(ctx).opt;
> + sb->s_flags &= ~ctx->sflags_mask;
> + sb->s_flags |= ctx->sflags;
> +
> + if (ctx->spec_mask & F2FS_SPEC_background_gc)
> + F2FS_OPTION(sbi).bggc_mode = F2FS_CTX_INFO(ctx).bggc_mode;
> + if (ctx->spec_mask & F2FS_SPEC_inline_xattr_size)
> + F2FS_OPTION(sbi).inline_xattr_size =
> + F2FS_CTX_INFO(ctx).inline_xattr_size;
> + if (ctx->spec_mask & F2FS_SPEC_active_logs)
> + F2FS_OPTION(sbi).active_logs = F2FS_CTX_INFO(ctx).active_logs;
> + if (ctx->spec_mask & F2FS_SPEC_reserve_root)
> + F2FS_OPTION(sbi).root_reserved_blocks =
> + F2FS_CTX_INFO(ctx).root_reserved_blocks;
> + if (ctx->spec_mask & F2FS_SPEC_resgid)
> + F2FS_OPTION(sbi).s_resgid = F2FS_CTX_INFO(ctx).s_resgid;
> + if (ctx->spec_mask & F2FS_SPEC_resuid)
> + F2FS_OPTION(sbi).s_resuid = F2FS_CTX_INFO(ctx).s_resuid;
> + if (ctx->spec_mask & F2FS_SPEC_mode)
> + F2FS_OPTION(sbi).fs_mode = F2FS_CTX_INFO(ctx).fs_mode;
> +#ifdef CONFIG_F2FS_FAULT_INJECTION
> + if (ctx->spec_mask & F2FS_SPEC_fault_injection)
> + (void)f2fs_build_fault_attr(sbi,
> + F2FS_CTX_INFO(ctx).fault_info.inject_rate, 0, FAULT_RATE);
> + if (ctx->spec_mask & F2FS_SPEC_fault_type)
> + (void)f2fs_build_fault_attr(sbi, 0,
> + F2FS_CTX_INFO(ctx).fault_info.inject_type, FAULT_TYPE);
> +#endif
> + if (ctx->spec_mask & F2FS_SPEC_alloc_mode)
> + F2FS_OPTION(sbi).alloc_mode = F2FS_CTX_INFO(ctx).alloc_mode;
> + if (ctx->spec_mask & F2FS_SPEC_fsync_mode)
> + F2FS_OPTION(sbi).fsync_mode = F2FS_CTX_INFO(ctx).fsync_mode;
> + if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap)
> + F2FS_OPTION(sbi).unusable_cap = F2FS_CTX_INFO(ctx).unusable_cap;
> + if (ctx->spec_mask & F2FS_SPEC_checkpoint_disable_cap_perc)
> + F2FS_OPTION(sbi).unusable_cap_perc =
> + F2FS_CTX_INFO(ctx).unusable_cap_perc;
> + if (ctx->spec_mask & F2FS_SPEC_discard_unit)
> + F2FS_OPTION(sbi).discard_unit = F2FS_CTX_INFO(ctx).discard_unit;
> + if (ctx->spec_mask & F2FS_SPEC_memory_mode)
> + F2FS_OPTION(sbi).memory_mode = F2FS_CTX_INFO(ctx).memory_mode;
> + if (ctx->spec_mask & F2FS_SPEC_errors)
> + F2FS_OPTION(sbi).errors = F2FS_CTX_INFO(ctx).errors;
> +
> + f2fs_apply_compression(fc, sb);
> + f2fs_apply_test_dummy_encryption(fc, sb);
> + f2fs_apply_quota_options(fc, sb);
> }
>
> static struct inode *f2fs_alloc_inode(struct super_block *sb)
> @@ -2275,6 +2587,8 @@ static int f2fs_remount(struct super_block *sb, int
> *flags, char *data)
> {
> struct f2fs_sb_info *sbi = F2FS_SB(sb);
> struct f2fs_mount_info org_mount_opt;
> + struct f2fs_fs_context ctx;
> + struct fs_context fc;
> unsigned long old_sb_flags;
> int err;
> bool need_restart_gc = false, need_stop_gc = false;
> @@ -2331,11 +2645,22 @@ static int f2fs_remount(struct super_block *sb, int
> *flags, char *data)
>
> default_options(sbi, true);
>
> + memset(&fc, 0, sizeof(fc));
> + memset(&ctx, 0, sizeof(ctx));
> + fc.fs_private = &ctx;
> + fc.purpose = FS_CONTEXT_FOR_RECONFIGURE;
> +
> /* parse mount options */
> - err = parse_options(sbi, data, true);
> + err = parse_options(&fc, data);
> if (err)
> goto restore_opts;
>
> + err = f2fs_check_opt_consistency(&fc, sb);
> + if (err < 0)
> + goto restore_opts;
> +
> + f2fs_apply_options(&fc, sb);
> +
> #ifdef CONFIG_BLK_DEV_ZONED
> if (f2fs_sb_has_blkzoned(sbi) &&
> sbi->max_open_zones < F2FS_OPTION(sbi).active_logs) {
> @@ -2346,11 +2671,6 @@ static int f2fs_remount(struct super_block *sb, int
> *flags, char *data)
> goto restore_opts;
> }
> #endif
> -
> - err = f2fs_validate_options(sbi);
> - if (err)
> - goto restore_opts;
> -
> /* flush outstanding errors before changing fs state */
> flush_work(&sbi->s_error_work);
>
> @@ -4429,6 +4749,8 @@ static int f2fs_fill_super(struct super_block *sb, void
> *data, int silent)
> {
> struct f2fs_sb_info *sbi;
> struct f2fs_super_block *raw_super;
> + struct f2fs_fs_context ctx;
> + struct fs_context fc;
> struct inode *root;
> int err;
> bool skip_recovery = false, need_fsck = false;
> @@ -4445,6 +4767,9 @@ static int f2fs_fill_super(struct super_block *sb, void
> *data, int silent)
> raw_super = NULL;
> valid_super_block = -1;
> recovery = 0;
> + memset(&fc, 0, sizeof(fc));
> + memset(&ctx, 0, sizeof(ctx));
> + fc.fs_private = &ctx;
>
> /* allocate memory for f2fs-specific super block info */
> sbi = kzalloc(sizeof(struct f2fs_sb_info), GFP_KERNEL);
> @@ -4502,14 +4827,16 @@ static int f2fs_fill_super(struct super_block *sb,
> void *data, int silent)
> goto free_sb_buf;
> }
>
> - err = parse_options(sbi, options, false);
> + err = parse_options(&fc, options);
> if (err)
> goto free_options;
>
> - err = f2fs_validate_options(sbi);
> - if (err)
> + err = f2fs_check_opt_consistency(&fc, sb);
> + if (err < 0)
> goto free_options;
>
> + f2fs_apply_options(&fc, sb);
> +
> sb->s_maxbytes = max_file_blocks(NULL) <<
> le32_to_cpu(raw_super->log_blocksize);
> sb->s_max_links = F2FS_LINK_MAX;
> --
> 2.49.0
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