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556e0319fb
Fast commits don't work with data journalling. This patch disables the fast commit support when data journalling is turned on. Suggested-by: Jan Kara <jack@suse.cz> Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com> Reviewed-by: Jan Kara <jack@suse.cz> Link: https://lore.kernel.org/r/20201106035911.1942128-19-harshadshirwadkar@gmail.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
158 lines
3.7 KiB
C
158 lines
3.7 KiB
C
/* 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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#define fc_for_each_tl(__start, __end, __tl) \
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for (tl = (struct ext4_fc_tl *)start; \
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(u8 *)tl < (u8 *)end; \
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tl = (struct ext4_fc_tl *)((u8 *)tl + \
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sizeof(struct ext4_fc_tl) + \
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+ le16_to_cpu(tl->fc_len)))
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#endif /* __FAST_COMMIT_H__ */
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