linux/fs/xfs/xfs_ondisk.h

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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2016 Oracle.
* All Rights Reserved.
*/
#ifndef __XFS_ONDISK_H
#define __XFS_ONDISK_H
#define XFS_CHECK_STRUCT_SIZE(structname, size) \
BUILD_BUG_ON_MSG(sizeof(structname) != (size), "XFS: sizeof(" \
#structname ") is wrong, expected " #size)
#define XFS_CHECK_OFFSET(structname, member, off) \
BUILD_BUG_ON_MSG(offsetof(structname, member) != (off), \
"XFS: offsetof(" #structname ", " #member ") is wrong, " \
"expected " #off)
#define XFS_CHECK_VALUE(value, expected) \
BUILD_BUG_ON_MSG((value) != (expected), \
"XFS: value of " #value " is wrong, expected " #expected)
static inline void __init
xfs_check_ondisk_structs(void)
{
/* ag/file structures */
XFS_CHECK_STRUCT_SIZE(struct xfs_acl, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_agf, 224);
XFS_CHECK_STRUCT_SIZE(struct xfs_agfl, 36);
XFS_CHECK_STRUCT_SIZE(struct xfs_agi, 344);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_shdr, 48);
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block_lhdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_btree_block, 72);
XFS_CHECK_STRUCT_SIZE(struct xfs_dinode, 176);
XFS_CHECK_STRUCT_SIZE(struct xfs_disk_dquot, 104);
XFS_CHECK_STRUCT_SIZE(struct xfs_dqblk, 136);
XFS_CHECK_STRUCT_SIZE(struct xfs_dsb, 264);
XFS_CHECK_STRUCT_SIZE(struct xfs_dsymlink_hdr, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_key, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_inobt_rec, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_key, 4);
XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec, 24);
XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_inobt_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_refcount_ptr_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_rmap_ptr_t, 4);
/* dir/attr trees */
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leaf_hdr, 80);
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_leafblock, 80);
XFS_CHECK_STRUCT_SIZE(struct xfs_attr3_rmt_hdr, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_blkinfo, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_intnode, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_da3_node_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_blk_hdr, 48);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_data_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_free_hdr, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_dir3_leaf_hdr, 64);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_hdr_t, 32);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_map_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_local_t, 4);
/*
* m68k has problems with xfs_attr_leaf_name_remote_t, but we pad it to
* 4 bytes anyway so it's not obviously a problem. Hence for the moment
* we don't check this structure. This can be re-instated when the attr
* definitions are updated to use c99 VLA definitions.
*
XFS_CHECK_STRUCT_SIZE(xfs_attr_leaf_name_remote_t, 12);
*/
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, valuelen, 0);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, namelen, 2);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_local_t, nameval, 3);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valueblk, 0);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, valuelen, 4);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen, 8);
XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name, 9);
XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t, 32);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count, 2);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen, 4);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen, 5);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags, 6);
XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval, 7);
XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t, 12);
XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_da_node_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_free_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_data_hdr_t, 16);
XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, freetag, 0);
XFS_CHECK_OFFSET(xfs_dir2_data_unused_t, length, 2);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_free_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_entry_t, 8);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_hdr_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_t, 16);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_leaf_tail_t, 4);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_entry_t, 3);
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, namelen, 0);
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, offset, 1);
XFS_CHECK_OFFSET(xfs_dir2_sf_entry_t, name, 3);
XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t, 10);
/* log structures */
xfs: make struct xfs_buf_log_format have a consistent size Increase XFS_BLF_DATAMAP_SIZE by 1 to fill in the implied padding at the end of struct xfs_buf_log_format. This makes the size consistent so that we can check it in xfs_ondisk.h, and will be needed once we start logging attribute values. On amd64 we get the following pahole: struct xfs_buf_log_format { short unsigned int blf_type; /* 0 2 */ short unsigned int blf_size; /* 2 2 */ short unsigned int blf_flags; /* 4 2 */ short unsigned int blf_len; /* 6 2 */ long long int blf_blkno; /* 8 8 */ unsigned int blf_map_size; /* 16 4 */ unsigned int blf_data_map[16]; /* 20 64 */ /* --- cacheline 1 boundary (64 bytes) was 20 bytes ago --- */ /* size: 88, cachelines: 2, members: 7 */ /* padding: 4 */ /* last cacheline: 24 bytes */ }; But on i386 we get the following: struct xfs_buf_log_format { short unsigned int blf_type; /* 0 2 */ short unsigned int blf_size; /* 2 2 */ short unsigned int blf_flags; /* 4 2 */ short unsigned int blf_len; /* 6 2 */ long long int blf_blkno; /* 8 8 */ unsigned int blf_map_size; /* 16 4 */ unsigned int blf_data_map[16]; /* 20 64 */ /* --- cacheline 1 boundary (64 bytes) was 20 bytes ago --- */ /* size: 84, cachelines: 2, members: 7 */ /* last cacheline: 20 bytes */ }; Notice how the amd64 compiler inserts 4 bytes of padding to the end of the structure to ensure 8-byte alignment. Prior to "xfs: fix memory corruption during remote attr value buffer invalidation" we would try to write to blf_data_map[17], which is harmless on amd64 but really bad on i386. This shouldn't cause any changes in the ondisk logging formats because the log code writes out the log vectors with the appropriate size for the log item's map_size, and log recovery treats the data_map array as a VLA. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de>
2020-01-08 08:12:25 +08:00
XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format, 88);
XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat, 24);
XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_32, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_efi_log_format_64, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_extent_32, 12);
XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode, 176);
XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log, 28);
XFS_CHECK_STRUCT_SIZE(xfs_log_timestamp_t, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_log_legacy_timestamp, 8);
XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32, 52);
XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format, 56);
XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat, 20);
XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header, 16);
xfs: Set up infrastructure for log attribute replay Currently attributes are modified directly across one or more transactions. But they are not logged or replayed in the event of an error. The goal of log attr replay is to enable logging and replaying of attribute operations using the existing delayed operations infrastructure. This will later enable the attributes to become part of larger multi part operations that also must first be recorded to the log. This is mostly of interest in the scheme of parent pointers which would need to maintain an attribute containing parent inode information any time an inode is moved, created, or removed. Parent pointers would then be of interest to any feature that would need to quickly derive an inode path from the mount point. Online scrub, nfs lookups and fs grow or shrink operations are all features that could take advantage of this. This patch adds two new log item types for setting or removing attributes as deferred operations. The xfs_attri_log_item will log an intent to set or remove an attribute. The corresponding xfs_attrd_log_item holds a reference to the xfs_attri_log_item and is freed once the transaction is done. Both log items use a generic xfs_attr_log_format structure that contains the attribute name, value, flags, inode, and an op_flag that indicates if the operations is a set or remove. [dchinner: added extra little bits needed for intent whiteouts] Signed-off-by: Allison Henderson <allison.henderson@oracle.com> Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Signed-off-by: Dave Chinner <david@fromorbit.com>
2022-05-04 10:41:02 +08:00
XFS_CHECK_STRUCT_SIZE(struct xfs_attri_log_format, 40);
XFS_CHECK_STRUCT_SIZE(struct xfs_attrd_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_bui_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_bud_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_cui_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_cud_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_rui_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_rud_log_format, 16);
XFS_CHECK_STRUCT_SIZE(struct xfs_map_extent, 32);
XFS_CHECK_STRUCT_SIZE(struct xfs_phys_extent, 16);
XFS_CHECK_OFFSET(struct xfs_bui_log_format, bui_extents, 16);
XFS_CHECK_OFFSET(struct xfs_cui_log_format, cui_extents, 16);
XFS_CHECK_OFFSET(struct xfs_rui_log_format, rui_extents, 16);
XFS_CHECK_OFFSET(struct xfs_efi_log_format, efi_extents, 16);
XFS_CHECK_OFFSET(struct xfs_efi_log_format_32, efi_extents, 16);
XFS_CHECK_OFFSET(struct xfs_efi_log_format_64, efi_extents, 16);
/*
* The v5 superblock format extended several v4 header structures with
* additional data. While new fields are only accessible on v5
* superblocks, it's important that the v5 structures place original v4
* fields/headers in the correct location on-disk. For example, we must
* be able to find magic values at the same location in certain blocks
* regardless of superblock version.
*
* The following checks ensure that various v5 data structures place the
* subset of v4 metadata associated with the same type of block at the
* start of the on-disk block. If there is no data structure definition
* for certain types of v4 blocks, traverse down to the first field of
* common metadata (e.g., magic value) and make sure it is at offset
* zero.
*/
XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr, 0);
XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr, 0);
XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic, 0);
XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic, 0);
XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192);
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24);
XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64);
XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req, 64);
/*
* Make sure the incore inode timestamp range corresponds to hand
* converted values based on the ondisk format specification.
*/
XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
XFS_LEGACY_TIME_MIN);
XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
16299260424LL);
/* Do the same with the incore quota expiration range. */
XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
16299260424LL);
}
#endif /* __XFS_ONDISK_H */