From: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Extend typ_t to (optionally) store a pointer to a function to calculate
the CRC of the block, provide functions to do this for the dir3 and
attr3 types, and then wire up the write command so that we can modify
directory and extended attribute block fields.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
---
db/attr.c | 32 ++++++++++++++++++++++++++++++++
db/attr.h | 1 +
db/dir2.c | 37 +++++++++++++++++++++++++++++++++++++
db/dir2.h | 1 +
db/type.c | 8 ++++----
db/type.h | 2 ++
db/write.c | 3 +++
7 files changed, 80 insertions(+), 4 deletions(-)
diff --git a/db/attr.c b/db/attr.c
index 98fb069..2fa6690 100644
--- a/db/attr.c
+++ b/db/attr.c
@@ -602,6 +602,38 @@ const struct field attr3_remote_crc_flds[] = {
{ NULL }
};
+/* Set the CRC. */
+void
+xfs_attr3_set_crc(
+ struct xfs_buf *bp)
+{
+ __be32 magic32;
+ __be16 magic16;
+
+ magic32 = *(__be32 *)bp->b_addr;
+ magic16 = ((struct xfs_da_blkinfo *)bp->b_addr)->magic;
+
+ switch (magic16) {
+ case cpu_to_be16(XFS_ATTR3_LEAF_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_ATTR3_LEAF_CRC_OFF);
+ return;
+ case cpu_to_be16(XFS_DA3_NODE_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_DA3_NODE_CRC_OFF);
+ return;
+ default:
+ break;
+ }
+
+ switch (magic32) {
+ case cpu_to_be32(XFS_ATTR3_RMT_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_ATTR3_RMT_CRC_OFF);
+ return;
+ default:
+ dbprintf(_("Unknown attribute buffer type!\n"));
+ break;
+ }
+}
+
/*
* Special read verifier for attribute buffers. Detect the magic number
* appropriately and set the correct verifier and call it.
diff --git a/db/attr.h b/db/attr.h
index 565d6d8..ba23480 100644
--- a/db/attr.h
+++ b/db/attr.h
@@ -36,5 +36,6 @@ extern const field_t attr3_remote_crc_flds[];
extern int attr_leaf_name_size(void *obj, int startoff, int idx);
extern int attr_size(void *obj, int startoff, int idx);
+extern void xfs_attr3_set_crc(struct xfs_buf *bp);
extern const struct xfs_buf_ops xfs_attr3_db_buf_ops;
diff --git a/db/dir2.c b/db/dir2.c
index 533f705..3e21a7b 100644
--- a/db/dir2.c
+++ b/db/dir2.c
@@ -981,6 +981,43 @@ const field_t da3_node_hdr_flds[] = {
{ NULL }
};
+/* Set the CRC. */
+void
+xfs_dir3_set_crc(
+ struct xfs_buf *bp)
+{
+ __be32 magic32;
+ __be16 magic16;
+
+ magic32 = *(__be32 *)bp->b_addr;
+ magic16 = ((struct xfs_da_blkinfo *)bp->b_addr)->magic;
+
+ switch (magic32) {
+ case cpu_to_be32(XFS_DIR3_BLOCK_MAGIC):
+ case cpu_to_be32(XFS_DIR3_DATA_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);
+ return;
+ case cpu_to_be32(XFS_DIR3_FREE_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_DIR3_FREE_CRC_OFF);
+ return;
+ default:
+ break;
+ }
+
+ switch (magic16) {
+ case cpu_to_be16(XFS_DIR3_LEAF1_MAGIC):
+ case cpu_to_be16(XFS_DIR3_LEAFN_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_DIR3_LEAF_CRC_OFF);
+ return;
+ case cpu_to_be16(XFS_DA3_NODE_MAGIC):
+ xfs_buf_update_cksum(bp, XFS_DA3_NODE_CRC_OFF);
+ return;
+ default:
+ dbprintf(_("Unknown directory buffer type! %x %x\n"), magic32, magic16);
+ break;
+ }
+}
+
/*
* Special read verifier for directory buffers. Detect the magic number
* appropriately and set the correct verifier and call it.
diff --git a/db/dir2.h b/db/dir2.h
index 0c2a62e..1b87cd2 100644
--- a/db/dir2.h
+++ b/db/dir2.h
@@ -60,5 +60,6 @@ static inline uint8_t *xfs_dir2_sf_inumberp(xfs_dir2_sf_entry_t *sfep)
extern int dir2_data_union_size(void *obj, int startoff, int idx);
extern int dir2_size(void *obj, int startoff, int idx);
+extern void xfs_dir3_set_crc(struct xfs_buf *bp);
extern const struct xfs_buf_ops xfs_dir3_db_buf_ops;
diff --git a/db/type.c b/db/type.c
index 10fa54e..bf31e04 100644
--- a/db/type.c
+++ b/db/type.c
@@ -87,7 +87,7 @@ static const typ_t __typtab_crc[] = {
{ TYP_AGI, "agi", handle_struct, agi_hfld, &xfs_agi_buf_ops,
XFS_AGI_CRC_OFF },
{ TYP_ATTR, "attr3", handle_struct, attr3_hfld,
- &xfs_attr3_db_buf_ops, TYP_F_NO_CRC_OFF },
+ &xfs_attr3_db_buf_ops, TYP_F_CRC_FUNC, xfs_attr3_set_crc },
{ TYP_BMAPBTA, "bmapbta", handle_struct, bmapbta_crc_hfld,
&xfs_bmbt_buf_ops, XFS_BTREE_LBLOCK_CRC_OFF },
{ TYP_BMAPBTD, "bmapbtd", handle_struct, bmapbtd_crc_hfld,
@@ -102,7 +102,7 @@ static const typ_t __typtab_crc[] = {
&xfs_refcountbt_buf_ops, XFS_BTREE_SBLOCK_CRC_OFF },
{ TYP_DATA, "data", handle_block, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_DIR2, "dir3", handle_struct, dir3_hfld,
- &xfs_dir3_db_buf_ops, TYP_F_NO_CRC_OFF },
+ &xfs_dir3_db_buf_ops, TYP_F_CRC_FUNC, xfs_dir3_set_crc },
{ TYP_DQBLK, "dqblk", handle_struct, dqblk_hfld,
&xfs_dquot_buf_ops, TYP_F_NO_CRC_OFF },
{ TYP_INOBT, "inobt", handle_struct, inobt_crc_hfld,
@@ -131,7 +131,7 @@ static const typ_t __typtab_spcrc[] = {
{ TYP_AGI, "agi", handle_struct, agi_hfld, &xfs_agi_buf_ops ,
XFS_AGI_CRC_OFF },
{ TYP_ATTR, "attr3", handle_struct, attr3_hfld,
- &xfs_attr3_db_buf_ops, TYP_F_NO_CRC_OFF },
+ &xfs_attr3_db_buf_ops, TYP_F_CRC_FUNC, xfs_attr3_set_crc },
{ TYP_BMAPBTA, "bmapbta", handle_struct, bmapbta_crc_hfld,
&xfs_bmbt_buf_ops, XFS_BTREE_LBLOCK_CRC_OFF },
{ TYP_BMAPBTD, "bmapbtd", handle_struct, bmapbtd_crc_hfld,
@@ -146,7 +146,7 @@ static const typ_t __typtab_spcrc[] = {
&xfs_refcountbt_buf_ops, XFS_BTREE_SBLOCK_CRC_OFF },
{ TYP_DATA, "data", handle_block, NULL, NULL, TYP_F_NO_CRC_OFF },
{ TYP_DIR2, "dir3", handle_struct, dir3_hfld,
- &xfs_dir3_db_buf_ops, TYP_F_NO_CRC_OFF },
+ &xfs_dir3_db_buf_ops, TYP_F_CRC_FUNC, xfs_dir3_set_crc },
{ TYP_DQBLK, "dqblk", handle_struct, dqblk_hfld,
&xfs_dquot_buf_ops, TYP_F_NO_CRC_OFF },
{ TYP_INOBT, "inobt", handle_struct, inobt_spcrc_hfld,
diff --git a/db/type.h b/db/type.h
index 87ff107..85d89c7 100644
--- a/db/type.h
+++ b/db/type.h
@@ -45,6 +45,8 @@ typedef struct typ
const struct xfs_buf_ops *bops;
unsigned long crc_off;
#define TYP_F_NO_CRC_OFF (-1UL)
+#define TYP_F_CRC_FUNC (-2UL)
+ void (*set_crc)(struct xfs_buf *);
} typ_t;
extern const typ_t *typtab, *cur_typ;
diff --git a/db/write.c b/db/write.c
index d24ea05..266bde4 100644
--- a/db/write.c
+++ b/db/write.c
@@ -173,6 +173,9 @@ write_f(
} else if (iocur_top->dquot_buf) {
local_ops.verify_write = xfs_verify_recalc_dquot_crc;
dbprintf(_("Allowing write of corrupted dquot with good CRC\n"));
+ } else if (iocur_top->typ->crc_off == TYP_F_CRC_FUNC) {
+ local_ops.verify_write = iocur_top->typ->set_crc;
+ dbprintf(_("Allowing write of corrupted data with good CRC\n"));
} else { /* invalid data */
local_ops.verify_write = xfs_verify_recalc_crc;
dbprintf(_("Allowing write of corrupted data with good CRC\n"));
--
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