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150 lines
3.4 KiB
150 lines
3.4 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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#ifndef __FAST_COMMIT_H__ |
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#define __FAST_COMMIT_H__ |
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/* Fast commit tags */ |
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#define EXT4_FC_TAG_ADD_RANGE 0x0001 |
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#define EXT4_FC_TAG_DEL_RANGE 0x0002 |
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#define EXT4_FC_TAG_CREAT 0x0003 |
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#define EXT4_FC_TAG_LINK 0x0004 |
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#define EXT4_FC_TAG_UNLINK 0x0005 |
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#define EXT4_FC_TAG_INODE 0x0006 |
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#define EXT4_FC_TAG_PAD 0x0007 |
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#define EXT4_FC_TAG_TAIL 0x0008 |
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#define EXT4_FC_TAG_HEAD 0x0009 |
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#define EXT4_FC_SUPPORTED_FEATURES 0x0 |
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/* On disk fast commit tlv value structures */ |
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/* Fast commit on disk tag length structure */ |
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struct ext4_fc_tl { |
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__le16 fc_tag; |
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__le16 fc_len; |
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}; |
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/* Value structure for tag EXT4_FC_TAG_HEAD. */ |
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struct ext4_fc_head { |
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__le32 fc_features; |
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__le32 fc_tid; |
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}; |
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/* Value structure for EXT4_FC_TAG_ADD_RANGE. */ |
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struct ext4_fc_add_range { |
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__le32 fc_ino; |
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__u8 fc_ex[12]; |
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}; |
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/* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */ |
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struct ext4_fc_del_range { |
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__le32 fc_ino; |
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__le32 fc_lblk; |
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__le32 fc_len; |
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}; |
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/* |
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* This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK |
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* and EXT4_FC_TAG_UNLINK. |
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*/ |
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struct ext4_fc_dentry_info { |
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__le32 fc_parent_ino; |
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__le32 fc_ino; |
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u8 fc_dname[0]; |
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}; |
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/* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */ |
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struct ext4_fc_inode { |
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__le32 fc_ino; |
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__u8 fc_raw_inode[0]; |
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}; |
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/* Value structure for tag EXT4_FC_TAG_TAIL. */ |
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struct ext4_fc_tail { |
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__le32 fc_tid; |
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__le32 fc_crc; |
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}; |
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/* |
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* In memory list of dentry updates that are performed on the file |
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* system used by fast commit code. |
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*/ |
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struct ext4_fc_dentry_update { |
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int fcd_op; /* Type of update create / unlink / link */ |
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int fcd_parent; /* Parent inode number */ |
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int fcd_ino; /* Inode number */ |
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struct qstr fcd_name; /* Dirent name */ |
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unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */ |
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struct list_head fcd_list; |
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}; |
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/* |
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* Fast commit reason codes |
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*/ |
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enum { |
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/* |
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* Commit status codes: |
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*/ |
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EXT4_FC_REASON_OK = 0, |
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EXT4_FC_REASON_INELIGIBLE, |
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EXT4_FC_REASON_ALREADY_COMMITTED, |
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EXT4_FC_REASON_FC_START_FAILED, |
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EXT4_FC_REASON_FC_FAILED, |
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/* |
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* Fast commit ineligiblity reasons: |
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*/ |
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EXT4_FC_REASON_XATTR = 0, |
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EXT4_FC_REASON_CROSS_RENAME, |
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EXT4_FC_REASON_JOURNAL_FLAG_CHANGE, |
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EXT4_FC_REASON_NOMEM, |
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EXT4_FC_REASON_SWAP_BOOT, |
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EXT4_FC_REASON_RESIZE, |
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EXT4_FC_REASON_RENAME_DIR, |
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EXT4_FC_REASON_FALLOC_RANGE, |
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EXT4_FC_REASON_INODE_JOURNAL_DATA, |
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EXT4_FC_COMMIT_FAILED, |
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EXT4_FC_REASON_MAX |
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}; |
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struct ext4_fc_stats { |
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unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX]; |
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unsigned long fc_num_commits; |
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unsigned long fc_ineligible_commits; |
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unsigned long fc_numblks; |
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}; |
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#define EXT4_FC_REPLAY_REALLOC_INCREMENT 4 |
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/* |
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* Physical block regions added to different inodes due to fast commit |
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* recovery. These are set during the SCAN phase. During the replay phase, |
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* our allocator excludes these from its allocation. This ensures that |
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* we don't accidentally allocating a block that is going to be used by |
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* another inode. |
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*/ |
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struct ext4_fc_alloc_region { |
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ext4_lblk_t lblk; |
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ext4_fsblk_t pblk; |
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int ino, len; |
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}; |
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/* |
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* Fast commit replay state. |
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*/ |
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struct ext4_fc_replay_state { |
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int fc_replay_num_tags; |
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int fc_replay_expected_off; |
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int fc_current_pass; |
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int fc_cur_tag; |
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int fc_crc; |
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struct ext4_fc_alloc_region *fc_regions; |
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int fc_regions_size, fc_regions_used, fc_regions_valid; |
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int *fc_modified_inodes; |
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int fc_modified_inodes_used, fc_modified_inodes_size; |
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}; |
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#define region_last(__region) (((__region)->lblk) + ((__region)->len) - 1) |
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#endif /* __FAST_COMMIT_H__ */
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