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xfs: add xfs_da_node verification 

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Phil White <pwhite@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
This commit is contained in:
Dave Chinner 2012-11-12 22:54:17 +11:00 committed by Ben Myers
parent ad14c33ac8
commit d9392a4bb7
7 changed files with 107 additions and 50 deletions
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22
fs/xfs/xfs_attr.c
View File

@ -1696,10 +1696,10 @@ xfs_attr_refillstate(xfs_da_state_t *state)
ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
if (blk->disk_blkno) {
error = xfs_da_read_buf(state->args->trans,
error = xfs_da_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK, NULL);
&blk->bp, XFS_ATTR_FORK);
if (error)
return(error);
} else {
@ -1715,10 +1715,10 @@ xfs_attr_refillstate(xfs_da_state_t *state)
ASSERT((path->active >= 0) && (path->active < XFS_DA_NODE_MAXDEPTH));
for (blk = path->blk, level = 0; level < path->active; blk++, level++) {
if (blk->disk_blkno) {
error = xfs_da_read_buf(state->args->trans,
error = xfs_da_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK, NULL);
&blk->bp, XFS_ATTR_FORK);
if (error)
return(error);
} else {
@ -1807,8 +1807,8 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
*/
bp = NULL;
if (cursor->blkno > 0) {
error = xfs_da_read_buf(NULL, context->dp, cursor->blkno, -1,
&bp, XFS_ATTR_FORK, NULL);
error = xfs_da_node_read(NULL, context->dp, cursor->blkno, -1,
&bp, XFS_ATTR_FORK);
if ((error != 0) && (error != EFSCORRUPTED))
return(error);
if (bp) {
@ -1849,17 +1849,11 @@ xfs_attr_node_list(xfs_attr_list_context_t *context)
if (bp == NULL) {
cursor->blkno = 0;
for (;;) {
error = xfs_da_read_buf(NULL, context->dp,
error = xfs_da_node_read(NULL, context->dp,
cursor->blkno, -1, &bp,
XFS_ATTR_FORK, NULL);
XFS_ATTR_FORK);
if (error)
return(error);
if (unlikely(bp == NULL)) {
XFS_ERROR_REPORT("xfs_attr_node_list(2)",
XFS_ERRLEVEL_LOW,
context->dp->i_mount);
return(XFS_ERROR(EFSCORRUPTED));
}
node = bp->b_addr;
if (node->hdr.info.magic ==
cpu_to_be16(XFS_ATTR_LEAF_MAGIC))

12
fs/xfs/xfs_attr_leaf.c
View File

@ -88,7 +88,7 @@ STATIC void xfs_attr_leaf_moveents(xfs_attr_leafblock_t *src_leaf,
xfs_mount_t *mp);
STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
static void
void
xfs_attr_leaf_verify(
struct xfs_buf *bp)
{
@ -2765,7 +2765,7 @@ xfs_attr_root_inactive(xfs_trans_t **trans, xfs_inode_t *dp)
* the extents in reverse order the extent containing
* block 0 must still be there.
*/
error = xfs_da_read_buf(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK, NULL);
error = xfs_da_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
if (error)
return(error);
blkno = XFS_BUF_ADDR(bp);
@ -2850,8 +2850,8 @@ xfs_attr_node_inactive(
* traversal of the tree so we may deal with many blocks
* before we come back to this one.
*/
error = xfs_da_read_buf(*trans, dp, child_fsb, -2, &child_bp,
XFS_ATTR_FORK, NULL);
error = xfs_da_node_read(*trans, dp, child_fsb, -2, &child_bp,
XFS_ATTR_FORK);
if (error)
return(error);
if (child_bp) {
@ -2891,8 +2891,8 @@ xfs_attr_node_inactive(
* child block number.
*/
if ((i+1) < count) {
error = xfs_da_read_buf(*trans, dp, 0, parent_blkno,
&bp, XFS_ATTR_FORK, NULL);
error = xfs_da_node_read(*trans, dp, 0, parent_blkno,
&bp, XFS_ATTR_FORK);
if (error)
return(error);
child_fsb = be32_to_cpu(node->btree[i+1].before);

8
fs/xfs/xfs_attr_leaf.h
View File

@ -227,9 +227,6 @@ int xfs_attr_leaf_to_shortform(struct xfs_buf *bp,
int xfs_attr_leaf_clearflag(struct xfs_da_args *args);
int xfs_attr_leaf_setflag(struct xfs_da_args *args);
int xfs_attr_leaf_flipflags(xfs_da_args_t *args);
int xfs_attr_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
xfs_dablk_t bno, xfs_daddr_t mappedbno,
struct xfs_buf **bpp);
/*
* Routines used for growing the Btree.
@ -264,4 +261,9 @@ int xfs_attr_leaf_order(struct xfs_buf *leaf1_bp,
struct xfs_buf *leaf2_bp);
int xfs_attr_leaf_newentsize(int namelen, int valuelen, int blocksize,
int *local);
int xfs_attr_leaf_read(struct xfs_trans *tp, struct xfs_inode *dp,
xfs_dablk_t bno, xfs_daddr_t mappedbno,
struct xfs_buf **bpp);
void xfs_attr_leaf_verify(struct xfs_buf *bp);
#endif /* __XFS_ATTR_LEAF_H__ */

109
fs/xfs/xfs_da_btree.c
View File

@ -91,6 +91,68 @@ STATIC int xfs_da_blk_unlink(xfs_da_state_t *state,
xfs_da_state_blk_t *save_blk);
STATIC void xfs_da_state_kill_altpath(xfs_da_state_t *state);
static void
__xfs_da_node_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_da_node_hdr *hdr = bp->b_addr;
int block_ok = 0;
block_ok = hdr->info.magic == cpu_to_be16(XFS_DA_NODE_MAGIC);
block_ok = block_ok &&
be16_to_cpu(hdr->level) > 0 &&
be16_to_cpu(hdr->count) > 0 ;
if (!block_ok) {
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, hdr);
xfs_buf_ioerror(bp, EFSCORRUPTED);
}
bp->b_iodone = NULL;
xfs_buf_ioend(bp, 0);
}
static void
xfs_da_node_verify(
struct xfs_buf *bp)
{
struct xfs_mount *mp = bp->b_target->bt_mount;
struct xfs_da_blkinfo *info = bp->b_addr;
switch (be16_to_cpu(info->magic)) {
case XFS_DA_NODE_MAGIC:
__xfs_da_node_verify(bp);
return;
case XFS_ATTR_LEAF_MAGIC:
xfs_attr_leaf_verify(bp);
return;
case XFS_DIR2_LEAFN_MAGIC:
xfs_dir2_leafn_verify(bp);
return;
default:
break;
}
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, info);
xfs_buf_ioerror(bp, EFSCORRUPTED);
bp->b_iodone = NULL;
xfs_buf_ioend(bp, 0);
}
int
xfs_da_node_read(
struct xfs_trans *tp,
struct xfs_inode *dp,
xfs_dablk_t bno,
xfs_daddr_t mappedbno,
struct xfs_buf **bpp,
int which_fork)
{
return xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
which_fork, xfs_da_node_verify);
}
/*========================================================================
* Routines used for growing the Btree.
*========================================================================*/
@ -746,8 +808,8 @@ xfs_da_root_join(xfs_da_state_t *state, xfs_da_state_blk_t *root_blk)
*/
child = be32_to_cpu(oldroot->btree[0].before);
ASSERT(child != 0);
error = xfs_da_read_buf(args->trans, args->dp, child, -1, &bp,
args->whichfork, NULL);
error = xfs_da_node_read(args->trans, args->dp, child, -1, &bp,
args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -837,9 +899,8 @@ xfs_da_node_toosmall(xfs_da_state_t *state, int *action)
blkno = be32_to_cpu(info->back);
if (blkno == 0)
continue;
error = xfs_da_read_buf(state->args->trans, state->args->dp,
blkno, -1, &bp, state->args->whichfork,
NULL);
error = xfs_da_node_read(state->args->trans, state->args->dp,
blkno, -1, &bp, state->args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -1084,8 +1145,8 @@ xfs_da_node_lookup_int(xfs_da_state_t *state, int *result)
* Read the next node down in the tree.
*/
blk->blkno = blkno;
error = xfs_da_read_buf(args->trans, args->dp, blkno,
-1, &blk->bp, args->whichfork, NULL);
error = xfs_da_node_read(args->trans, args->dp, blkno,
-1, &blk->bp, args->whichfork);
if (error) {
blk->blkno = 0;
state->path.active--;
@ -1246,9 +1307,9 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
new_info->forw = cpu_to_be32(old_blk->blkno);
new_info->back = old_info->back;
if (old_info->back) {
error = xfs_da_read_buf(args->trans, args->dp,
error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(old_info->back),
-1, &bp, args->whichfork, NULL);
-1, &bp, args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -1267,9 +1328,9 @@ xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
new_info->forw = old_info->forw;
new_info->back = cpu_to_be32(old_blk->blkno);
if (old_info->forw) {
error = xfs_da_read_buf(args->trans, args->dp,
error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(old_info->forw),
-1, &bp, args->whichfork, NULL);
-1, &bp, args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -1367,9 +1428,9 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk,
trace_xfs_da_unlink_back(args);
save_info->back = drop_info->back;
if (drop_info->back) {
error = xfs_da_read_buf(args->trans, args->dp,
error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->back),
-1, &bp, args->whichfork, NULL);
-1, &bp, args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -1384,9 +1445,9 @@ xfs_da_blk_unlink(xfs_da_state_t *state, xfs_da_state_blk_t *drop_blk,
trace_xfs_da_unlink_forward(args);
save_info->forw = drop_info->forw;
if (drop_info->forw) {
error = xfs_da_read_buf(args->trans, args->dp,
error = xfs_da_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->forw),
-1, &bp, args->whichfork, NULL);
-1, &bp, args->whichfork);
if (error)
return(error);
ASSERT(bp != NULL);
@ -1470,8 +1531,8 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
* Read the next child block.
*/
blk->blkno = blkno;
error = xfs_da_read_buf(args->trans, args->dp, blkno, -1,
&blk->bp, args->whichfork, NULL);
error = xfs_da_node_read(args->trans, args->dp, blkno, -1,
&blk->bp, args->whichfork);
if (error)
return(error);
ASSERT(blk->bp != NULL);
@ -1734,7 +1795,7 @@ xfs_da_swap_lastblock(
* Read the last block in the btree space.
*/
last_blkno = (xfs_dablk_t)lastoff - mp->m_dirblkfsbs;
error = xfs_da_read_buf(tp, ip, last_blkno, -1, &last_buf, w, NULL);
error = xfs_da_node_read(tp, ip, last_blkno, -1, &last_buf, w);
if (error)
return error;
/*
@ -1761,8 +1822,7 @@ xfs_da_swap_lastblock(
* If the moved block has a left sibling, fix up the pointers.
*/
if ((sib_blkno = be32_to_cpu(dead_info->back))) {
error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w,
NULL);
error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w);
if (error)
goto done;
sib_info = sib_buf->b_addr;
@ -1784,8 +1844,7 @@ xfs_da_swap_lastblock(
* If the moved block has a right sibling, fix up the pointers.
*/
if ((sib_blkno = be32_to_cpu(dead_info->forw))) {
error = xfs_da_read_buf(tp, ip, sib_blkno, -1, &sib_buf, w,
NULL);
error = xfs_da_node_read(tp, ip, sib_blkno, -1, &sib_buf, w);
if (error)
goto done;
sib_info = sib_buf->b_addr;
@ -1809,8 +1868,7 @@ xfs_da_swap_lastblock(
* Walk down the tree looking for the parent of the moved block.
*/
for (;;) {
error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w,
NULL);
error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w);
if (error)
goto done;
par_node = par_buf->b_addr;
@ -1861,8 +1919,7 @@ xfs_da_swap_lastblock(
error = XFS_ERROR(EFSCORRUPTED);
goto done;
}
error = xfs_da_read_buf(tp, ip, par_blkno, -1, &par_buf, w,
NULL);
error = xfs_da_node_read(tp, ip, par_blkno, -1, &par_buf, w);
if (error)
goto done;
par_node = par_buf->b_addr;

3
fs/xfs/xfs_da_btree.h
View File

@ -213,6 +213,9 @@ int xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
*/
int xfs_da_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
xfs_da_state_blk_t *new_blk);
int xfs_da_node_read(struct xfs_trans *tp, struct xfs_inode *dp,
xfs_dablk_t bno, xfs_daddr_t mappedbno,
struct xfs_buf **bpp, int which_fork);
/*
* Utility routines.

2
fs/xfs/xfs_dir2_leaf.c
View File

@ -74,7 +74,7 @@ xfs_dir2_leaf1_verify(
xfs_dir2_leaf_verify(bp, cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
}
static void
void
xfs_dir2_leafn_verify(
struct xfs_buf *bp)
{

1
fs/xfs/xfs_dir2_priv.h
View File

@ -70,6 +70,7 @@ extern void xfs_dir2_data_use_free(struct xfs_trans *tp, struct xfs_buf *bp,
xfs_dir2_data_aoff_t len, int *needlogp, int *needscanp);
/* xfs_dir2_leaf.c */
extern void xfs_dir2_leafn_verify(struct xfs_buf *bp);
extern int xfs_dir2_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp,
xfs_dablk_t fbno, xfs_daddr_t mappedbno, struct xfs_buf **bpp);
extern int xfs_dir2_block_to_leaf(struct xfs_da_args *args,