Messages in this thread | | | Subject | Re: [f2fs-dev] [PATCH 2/2 v3] f2fs: support RO feature | From | Chao Yu <> | Date | Wed, 2 Jun 2021 23:16:50 +0800 |
| |
On 2021/5/26 22:43, Jaegeuk Kim wrote: > Given RO feature in superblock, we don't need to check provisioning/reserve > spaces and SSA area.
It needs to update below two sysfs entries for RO feature? /sys/fs/f2fs/<device>/features /sys/fs/f2fs/features/..
Thanks,
> > Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org> > --- > Change log from v2: > - allow curseg updates > - fix some bugs > > fs/f2fs/f2fs.h | 2 ++ > fs/f2fs/segment.c | 4 ++++ > fs/f2fs/super.c | 37 +++++++++++++++++++++++++++++++------ > 3 files changed, 37 insertions(+), 6 deletions(-) > > diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h > index eaf57b5f3c4b..9ad502f92529 100644 > --- a/fs/f2fs/f2fs.h > +++ b/fs/f2fs/f2fs.h > @@ -168,6 +168,7 @@ struct f2fs_mount_info { > #define F2FS_FEATURE_SB_CHKSUM 0x0800 > #define F2FS_FEATURE_CASEFOLD 0x1000 > #define F2FS_FEATURE_COMPRESSION 0x2000 > +#define F2FS_FEATURE_RO 0x4000 > > #define __F2FS_HAS_FEATURE(raw_super, mask) \ > ((raw_super->feature & cpu_to_le32(mask)) != 0) > @@ -940,6 +941,7 @@ static inline void set_new_dnode(struct dnode_of_data *dn, struct inode *inode, > #define NR_CURSEG_DATA_TYPE (3) > #define NR_CURSEG_NODE_TYPE (3) > #define NR_CURSEG_INMEM_TYPE (2) > +#define NR_CURSEG_RO_TYPE (2) > #define NR_CURSEG_PERSIST_TYPE (NR_CURSEG_DATA_TYPE + NR_CURSEG_NODE_TYPE) > #define NR_CURSEG_TYPE (NR_CURSEG_INMEM_TYPE + NR_CURSEG_PERSIST_TYPE) > > diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c > index 8668df7870d0..02e0c38be7eb 100644 > --- a/fs/f2fs/segment.c > +++ b/fs/f2fs/segment.c > @@ -4683,6 +4683,10 @@ static int sanity_check_curseg(struct f2fs_sb_info *sbi) > struct seg_entry *se = get_seg_entry(sbi, curseg->segno); > unsigned int blkofs = curseg->next_blkoff; > > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO) && > + i != CURSEG_HOT_DATA && i != CURSEG_HOT_NODE) > + continue; > + > sanity_check_seg_type(sbi, curseg->seg_type); > > if (f2fs_test_bit(blkofs, se->cur_valid_map)) > diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c > index e70aca8f97bd..6788e7b71e27 100644 > --- a/fs/f2fs/super.c > +++ b/fs/f2fs/super.c > @@ -555,7 +555,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) > int ret; > > if (!options) > - return 0; > + goto default_check; > > while ((p = strsep(&options, ",")) != NULL) { > int token; > @@ -1090,6 +1090,7 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) > return -EINVAL; > } > } > +default_check: > #ifdef CONFIG_QUOTA > if (f2fs_check_quota_options(sbi)) > return -EINVAL; > @@ -1162,6 +1163,11 @@ static int parse_options(struct super_block *sb, char *options, bool is_remount) > */ > if (F2FS_OPTION(sbi).active_logs != NR_CURSEG_TYPE) > F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF; > + > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO) && !f2fs_readonly(sbi->sb)) { > + f2fs_err(sbi, "Allow to mount readonly mode only"); > + return -EROFS; > + } > return 0; > } > > @@ -1819,7 +1825,11 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root) > static void default_options(struct f2fs_sb_info *sbi) > { > /* init some FS parameters */ > - F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE; > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO)) > + F2FS_OPTION(sbi).active_logs = NR_CURSEG_RO_TYPE; > + else > + F2FS_OPTION(sbi).active_logs = NR_CURSEG_PERSIST_TYPE; > + > F2FS_OPTION(sbi).inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS; > F2FS_OPTION(sbi).whint_mode = WHINT_MODE_OFF; > F2FS_OPTION(sbi).alloc_mode = ALLOC_MODE_DEFAULT; > @@ -2001,6 +2011,11 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data) > if (f2fs_readonly(sb) && (*flags & SB_RDONLY)) > goto skip; > > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO) && !(*flags & SB_RDONLY)) { > + err = -EROFS; > + goto restore_opts; > + } > + > #ifdef CONFIG_QUOTA > if (!f2fs_readonly(sb) && (*flags & SB_RDONLY)) { > err = dquot_suspend(sb, -1); > @@ -3134,14 +3149,15 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) > ovp_segments = le32_to_cpu(ckpt->overprov_segment_count); > reserved_segments = le32_to_cpu(ckpt->rsvd_segment_count); > > - if (unlikely(fsmeta < F2FS_MIN_META_SEGMENTS || > + if (!F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO) && > + unlikely(fsmeta < F2FS_MIN_META_SEGMENTS || > ovp_segments == 0 || reserved_segments == 0)) { > f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version"); > return 1; > } > - > user_block_count = le64_to_cpu(ckpt->user_block_count); > - segment_count_main = le32_to_cpu(raw_super->segment_count_main); > + segment_count_main = le32_to_cpu(raw_super->segment_count_main) + > + (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO) ? 1 : 0); > log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg); > if (!user_block_count || user_block_count >= > segment_count_main << log_blocks_per_seg) { > @@ -3172,6 +3188,10 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) > if (le32_to_cpu(ckpt->cur_node_segno[i]) >= main_segs || > le16_to_cpu(ckpt->cur_node_blkoff[i]) >= blocks_per_seg) > return 1; > + > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO)) > + goto check_data; > + > for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) { > if (le32_to_cpu(ckpt->cur_node_segno[i]) == > le32_to_cpu(ckpt->cur_node_segno[j])) { > @@ -3182,10 +3202,15 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) > } > } > } > +check_data: > for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) { > if (le32_to_cpu(ckpt->cur_data_segno[i]) >= main_segs || > le16_to_cpu(ckpt->cur_data_blkoff[i]) >= blocks_per_seg) > return 1; > + > + if (F2FS_HAS_FEATURE(sbi, F2FS_FEATURE_RO)) > + goto skip_cross; > + > for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) { > if (le32_to_cpu(ckpt->cur_data_segno[i]) == > le32_to_cpu(ckpt->cur_data_segno[j])) { > @@ -3207,7 +3232,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi) > } > } > } > - > +skip_cross: > sit_bitmap_size = le32_to_cpu(ckpt->sit_ver_bitmap_bytesize); > nat_bitmap_size = le32_to_cpu(ckpt->nat_ver_bitmap_bytesize); > >
| |