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hc
2024-05-11 297b60346df8beafee954a0fd7c2d64f33f3b9bc 
 kernel/fs/xfs/xfs_ondisk.h
....@@ -15,6 +15,10 @@
1515 		"XFS: offsetof(" #structname ", " #member ") is wrong, " \
1616 		"expected " #off)
1717 
18
+#define XFS_CHECK_VALUE(value, expected) \
19
+	BUILD_BUG_ON_MSG((value) != (expected), \
20
+		"XFS: value of " #value " is wrong, expected " #expected)
21
+
1822 static inline void __init
1923 xfs_check_ondisk_structs(void)
2024 {
....@@ -23,7 +27,7 @@
2327 	XFS_CHECK_STRUCT_SIZE(struct xfs_acl_entry,		12);
2428 	XFS_CHECK_STRUCT_SIZE(struct xfs_agf,			224);
2529 	XFS_CHECK_STRUCT_SIZE(struct xfs_agfl,			36);
26
-	XFS_CHECK_STRUCT_SIZE(struct xfs_agi,			336);
30
+	XFS_CHECK_STRUCT_SIZE(struct xfs_agi,			344);
2731 	XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_key,		8);
2832 	XFS_CHECK_STRUCT_SIZE(struct xfs_bmbt_rec,		16);
2933 	XFS_CHECK_STRUCT_SIZE(struct xfs_bmdr_block,		4);
....@@ -41,7 +45,8 @@
4145 	XFS_CHECK_STRUCT_SIZE(struct xfs_refcount_rec,		12);
4246 	XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_key,		20);
4347 	XFS_CHECK_STRUCT_SIZE(struct xfs_rmap_rec,		24);
44
-	XFS_CHECK_STRUCT_SIZE(struct xfs_timestamp,		8);
48
+	XFS_CHECK_STRUCT_SIZE(xfs_timestamp_t,			8);
49
+	XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_timestamp,	8);
4550 	XFS_CHECK_STRUCT_SIZE(xfs_alloc_key_t,			8);
4651 	XFS_CHECK_STRUCT_SIZE(xfs_alloc_ptr_t,			4);
4752 	XFS_CHECK_STRUCT_SIZE(xfs_alloc_rec_t,			8);
....@@ -84,12 +89,12 @@
8489 	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, namelen,	8);
8590 	XFS_CHECK_OFFSET(xfs_attr_leaf_name_remote_t, name,	9);
8691 	XFS_CHECK_STRUCT_SIZE(xfs_attr_leafblock_t,		40);
87
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.totsize,	0);
88
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, hdr.count,	2);
89
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].namelen,	4);
90
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].valuelen, 5);
91
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].flags,	6);
92
-	XFS_CHECK_OFFSET(xfs_attr_shortform_t, list[0].nameval,	7);
92
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.totsize, 0);
93
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, hdr.count,	 2);
94
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].namelen,	4);
95
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].valuelen,	5);
96
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].flags,	6);
97
+	XFS_CHECK_OFFSET(struct xfs_attr_shortform, list[0].nameval,	7);
9398 	XFS_CHECK_STRUCT_SIZE(xfs_da_blkinfo_t,			12);
9499 	XFS_CHECK_STRUCT_SIZE(xfs_da_intnode_t,			16);
95100 	XFS_CHECK_STRUCT_SIZE(xfs_da_node_entry_t,		8);
....@@ -111,6 +116,7 @@
111116 	XFS_CHECK_STRUCT_SIZE(xfs_dir2_sf_hdr_t,		10);
112117 
113118 	/* log structures */
119
+	XFS_CHECK_STRUCT_SIZE(struct xfs_buf_log_format,	88);
114120 	XFS_CHECK_STRUCT_SIZE(struct xfs_dq_logformat,		24);
115121 	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_32,	28);
116122 	XFS_CHECK_STRUCT_SIZE(struct xfs_efd_log_format_64,	32);
....@@ -120,11 +126,52 @@
120126 	XFS_CHECK_STRUCT_SIZE(struct xfs_extent_64,		16);
121127 	XFS_CHECK_STRUCT_SIZE(struct xfs_log_dinode,		176);
122128 	XFS_CHECK_STRUCT_SIZE(struct xfs_icreate_log,		28);
123
-	XFS_CHECK_STRUCT_SIZE(struct xfs_ictimestamp,		8);
129
+	XFS_CHECK_STRUCT_SIZE(xfs_ictimestamp_t,		8);
130
+	XFS_CHECK_STRUCT_SIZE(struct xfs_legacy_ictimestamp,	8);
124131 	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format_32,	52);
125132 	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format,	56);
126133 	XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat,	20);
127134 	XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header,		16);
135
+
136
+	/*
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+	 * The v5 superblock format extended several v4 header structures with
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+	 * additional data. While new fields are only accessible on v5
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+	 * superblocks, it's important that the v5 structures place original v4
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+	 * fields/headers in the correct location on-disk. For example, we must
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+	 * be able to find magic values at the same location in certain blocks
142
+	 * regardless of superblock version.
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+	 *
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+	 * The following checks ensure that various v5 data structures place the
145
+	 * subset of v4 metadata associated with the same type of block at the
146
+	 * start of the on-disk block. If there is no data structure definition
147
+	 * for certain types of v4 blocks, traverse down to the first field of
148
+	 * common metadata (e.g., magic value) and make sure it is at offset
149
+	 * zero.
150
+	 */
151
+	XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr,	0);
152
+	XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr,	0);
153
+	XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic,	0);
154
+	XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic,	0);
155
+	XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
156
+
157
+	XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat,		192);
158
+	XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers,		24);
159
+	XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req,		64);
160
+	XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req,		64);
161
+
162
+	/*
163
+	 * Make sure the incore inode timestamp range corresponds to hand
164
+	 * converted values based on the ondisk format specification.
165
+	 */
166
+	XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MIN - XFS_BIGTIME_EPOCH_OFFSET,
167
+			XFS_LEGACY_TIME_MIN);
168
+	XFS_CHECK_VALUE(XFS_BIGTIME_TIME_MAX - XFS_BIGTIME_EPOCH_OFFSET,
169
+			16299260424LL);
170
+
171
+	/* Do the same with the incore quota expiration range. */
172
+	XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MIN << XFS_DQ_BIGTIME_SHIFT, 4);
173
+	XFS_CHECK_VALUE(XFS_DQ_BIGTIME_EXPIRY_MAX << XFS_DQ_BIGTIME_SHIFT,
174
+			16299260424LL);
128175 }
129176 
130177 #endif /* __XFS_ONDISK_H */