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4ba99dde33
Add a flag for tracking whether a directory has case-insensitive descendents - so that overlayfs can disallow mounting, even though the filesystem supports case insensitivity. This is a new on disk format version, with a (cheap) upgrade to ensure the flag is correctly set on existing inodes. Create, rename and fssetxattr are all plumbed to ensure the new flag is set, and we've got new fsck code that hooks into check_inode(0. Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
185 lines
4.1 KiB
C
185 lines
4.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_INODE_FORMAT_H
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#define _BCACHEFS_INODE_FORMAT_H
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#define BLOCKDEV_INODE_MAX 4096
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#define BCACHEFS_ROOT_INO 4096
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struct bch_inode {
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struct bch_val v;
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__le64 bi_hash_seed;
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__le32 bi_flags;
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__le16 bi_mode;
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__u8 fields[];
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} __packed __aligned(8);
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struct bch_inode_v2 {
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struct bch_val v;
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__le64 bi_journal_seq;
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__le64 bi_hash_seed;
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__le64 bi_flags;
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__le16 bi_mode;
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__u8 fields[];
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} __packed __aligned(8);
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struct bch_inode_v3 {
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struct bch_val v;
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__le64 bi_journal_seq;
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__le64 bi_hash_seed;
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__le64 bi_flags;
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__le64 bi_sectors;
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__le64 bi_size;
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__le64 bi_version;
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__u8 fields[];
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} __packed __aligned(8);
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#define INODEv3_FIELDS_START_INITIAL 6
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#define INODEv3_FIELDS_START_CUR (offsetof(struct bch_inode_v3, fields) / sizeof(__u64))
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struct bch_inode_generation {
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struct bch_val v;
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__le32 bi_generation;
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__le32 pad;
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} __packed __aligned(8);
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/*
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* bi_subvol and bi_parent_subvol are only set for subvolume roots:
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*/
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#define BCH_INODE_FIELDS_v2() \
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x(bi_atime, 96) \
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x(bi_ctime, 96) \
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x(bi_mtime, 96) \
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x(bi_otime, 96) \
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x(bi_size, 64) \
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x(bi_sectors, 64) \
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x(bi_uid, 32) \
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x(bi_gid, 32) \
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x(bi_nlink, 32) \
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x(bi_generation, 32) \
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x(bi_dev, 32) \
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x(bi_data_checksum, 8) \
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x(bi_compression, 8) \
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x(bi_project, 32) \
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x(bi_background_compression, 8) \
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x(bi_data_replicas, 8) \
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x(bi_promote_target, 16) \
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x(bi_foreground_target, 16) \
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x(bi_background_target, 16) \
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x(bi_erasure_code, 16) \
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x(bi_fields_set, 16) \
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x(bi_dir, 64) \
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x(bi_dir_offset, 64) \
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x(bi_subvol, 32) \
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x(bi_parent_subvol, 32)
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#define BCH_INODE_FIELDS_v3() \
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x(bi_atime, 96) \
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x(bi_ctime, 96) \
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x(bi_mtime, 96) \
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x(bi_otime, 96) \
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x(bi_uid, 32) \
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x(bi_gid, 32) \
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x(bi_nlink, 32) \
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x(bi_generation, 32) \
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x(bi_dev, 32) \
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x(bi_data_checksum, 8) \
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x(bi_compression, 8) \
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x(bi_project, 32) \
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x(bi_background_compression, 8) \
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x(bi_data_replicas, 8) \
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x(bi_promote_target, 16) \
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x(bi_foreground_target, 16) \
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x(bi_background_target, 16) \
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x(bi_erasure_code, 16) \
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x(bi_fields_set, 16) \
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x(bi_dir, 64) \
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x(bi_dir_offset, 64) \
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x(bi_subvol, 32) \
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x(bi_parent_subvol, 32) \
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x(bi_nocow, 8) \
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x(bi_depth, 32) \
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x(bi_inodes_32bit, 8) \
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x(bi_casefold, 8)
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/* subset of BCH_INODE_FIELDS */
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#define BCH_INODE_OPTS() \
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x(data_checksum, 8) \
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x(compression, 8) \
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x(project, 32) \
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x(background_compression, 8) \
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x(data_replicas, 8) \
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x(promote_target, 16) \
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x(foreground_target, 16) \
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x(background_target, 16) \
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x(erasure_code, 16) \
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x(nocow, 8) \
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x(inodes_32bit, 8) \
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x(casefold, 8)
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enum inode_opt_id {
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#define x(name, ...) \
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Inode_opt_##name,
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BCH_INODE_OPTS()
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#undef x
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Inode_opt_nr,
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};
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/*
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* BCH_INODE_has_case_insensitive is set if any descendent is case insensitive -
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* for overlayfs
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*/
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#define BCH_INODE_FLAGS() \
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x(sync, 0) \
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x(immutable, 1) \
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x(append, 2) \
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x(nodump, 3) \
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x(noatime, 4) \
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x(i_size_dirty, 5) \
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x(i_sectors_dirty, 6) \
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x(unlinked, 7) \
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x(backptr_untrusted, 8) \
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x(has_child_snapshot, 9) \
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x(has_case_insensitive, 10)
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/* bits 20+ reserved for packed fields below: */
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enum bch_inode_flags {
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#define x(t, n) BCH_INODE_##t = 1U << n,
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BCH_INODE_FLAGS()
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#undef x
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};
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enum __bch_inode_flags {
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#define x(t, n) __BCH_INODE_##t = n,
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BCH_INODE_FLAGS()
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#undef x
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};
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LE32_BITMASK(INODEv1_STR_HASH, struct bch_inode, bi_flags, 20, 24);
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LE32_BITMASK(INODEv1_NR_FIELDS, struct bch_inode, bi_flags, 24, 31);
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LE32_BITMASK(INODEv1_NEW_VARINT,struct bch_inode, bi_flags, 31, 32);
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LE64_BITMASK(INODEv2_STR_HASH, struct bch_inode_v2, bi_flags, 20, 24);
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LE64_BITMASK(INODEv2_NR_FIELDS, struct bch_inode_v2, bi_flags, 24, 31);
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LE64_BITMASK(INODEv3_STR_HASH, struct bch_inode_v3, bi_flags, 20, 24);
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LE64_BITMASK(INODEv3_NR_FIELDS, struct bch_inode_v3, bi_flags, 24, 31);
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LE64_BITMASK(INODEv3_FIELDS_START,
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struct bch_inode_v3, bi_flags, 31, 36);
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LE64_BITMASK(INODEv3_MODE, struct bch_inode_v3, bi_flags, 36, 52);
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struct bch_inode_alloc_cursor {
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struct bch_val v;
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__u8 bits;
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__u8 pad;
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__le32 gen;
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__le64 idx;
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};
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#endif /* _BCACHEFS_INODE_FORMAT_H */
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