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xfs: split xfs_da3_node_read 

Split xfs_da3_node_read into one variant that always looks up the daddr
and doesn't accept holes, and one that already has a daddr at hand.
This is in preparation of splitting up xfs_da_read_buf in a similar way.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2019-11-20 09:46:04 -08:00 committed by Darrick J. Wong
parent f3fcb314d1
commit 02c57f0a8b
5 changed files with 82 additions and 63 deletions
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14
fs/xfs/libxfs/xfs_attr.c
View File

@ -1266,10 +1266,9 @@ 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_da3_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
error = xfs_da3_node_read_mapped(state->args->trans,
state->args->dp, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
if (error)
return error;
} else {
@ -1285,10 +1284,9 @@ 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_da3_node_read(state->args->trans,
state->args->dp,
blk->blkno, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
error = xfs_da3_node_read_mapped(state->args->trans,
state->args->dp, blk->disk_blkno,
&blk->bp, XFS_ATTR_FORK);
if (error)
return error;
} else {

111
fs/xfs/libxfs/xfs_da_btree.c
View File

@ -331,46 +331,66 @@ const struct xfs_buf_ops xfs_da3_node_buf_ops = {
.verify_struct = xfs_da3_node_verify_struct,
};
static int
xfs_da3_node_set_type(
struct xfs_trans *tp,
struct xfs_buf *bp)
{
struct xfs_da_blkinfo *info = bp->b_addr;
switch (be16_to_cpu(info->magic)) {
case XFS_DA_NODE_MAGIC:
case XFS_DA3_NODE_MAGIC:
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DA_NODE_BUF);
return 0;
case XFS_ATTR_LEAF_MAGIC:
case XFS_ATTR3_LEAF_MAGIC:
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_ATTR_LEAF_BUF);
return 0;
case XFS_DIR2_LEAFN_MAGIC:
case XFS_DIR3_LEAFN_MAGIC:
xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_LEAFN_BUF);
return 0;
default:
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, tp->t_mountp,
info, sizeof(*info));
xfs_trans_brelse(tp, bp);
return -EFSCORRUPTED;
}
}
int
xfs_da3_node_read(
struct xfs_trans *tp,
struct xfs_inode *dp,
xfs_dablk_t bno,
struct xfs_buf **bpp,
int whichfork)
{
int error;
error = xfs_da_read_buf(tp, dp, bno, -1, bpp, whichfork,
&xfs_da3_node_buf_ops);
if (error || !*bpp || !tp)
return error;
return xfs_da3_node_set_type(tp, *bpp);
}
int
xfs_da3_node_read_mapped(
struct xfs_trans *tp,
struct xfs_inode *dp,
xfs_daddr_t mappedbno,
struct xfs_buf **bpp,
int which_fork)
int whichfork)
{
int err;
int error;
err = xfs_da_read_buf(tp, dp, bno, mappedbno, bpp,
which_fork, &xfs_da3_node_buf_ops);
if (!err && tp && *bpp) {
struct xfs_da_blkinfo *info = (*bpp)->b_addr;
int type;
switch (be16_to_cpu(info->magic)) {
case XFS_DA_NODE_MAGIC:
case XFS_DA3_NODE_MAGIC:
type = XFS_BLFT_DA_NODE_BUF;
break;
case XFS_ATTR_LEAF_MAGIC:
case XFS_ATTR3_LEAF_MAGIC:
type = XFS_BLFT_ATTR_LEAF_BUF;
break;
case XFS_DIR2_LEAFN_MAGIC:
case XFS_DIR3_LEAFN_MAGIC:
type = XFS_BLFT_DIR_LEAFN_BUF;
break;
default:
XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW,
tp->t_mountp, info, sizeof(*info));
xfs_trans_brelse(tp, *bpp);
*bpp = NULL;
return -EFSCORRUPTED;
}
xfs_trans_buf_set_type(tp, *bpp, type);
}
return err;
error = xfs_da_read_buf(tp, dp, 0, mappedbno, bpp, whichfork,
&xfs_da3_node_buf_ops);
if (error || !*bpp || !tp)
return error;
return xfs_da3_node_set_type(tp, *bpp);
}
/*========================================================================
@ -1166,8 +1186,7 @@ xfs_da3_root_join(
*/
child = be32_to_cpu(oldroothdr.btree[0].before);
ASSERT(child != 0);
error = xfs_da3_node_read(args->trans, dp, child, -1, &bp,
args->whichfork);
error = xfs_da3_node_read(args->trans, dp, child, &bp, args->whichfork);
if (error)
return error;
xfs_da_blkinfo_onlychild_validate(bp->b_addr, oldroothdr.level);
@ -1281,8 +1300,8 @@ xfs_da3_node_toosmall(
blkno = nodehdr.back;
if (blkno == 0)
continue;
error = xfs_da3_node_read(state->args->trans, dp,
blkno, -1, &bp, state->args->whichfork);
error = xfs_da3_node_read(state->args->trans, dp, blkno, &bp,
state->args->whichfork);
if (error)
return error;
@ -1570,7 +1589,7 @@ xfs_da3_node_lookup_int(
*/
blk->blkno = blkno;
error = xfs_da3_node_read(args->trans, args->dp, blkno,
-1, &blk->bp, args->whichfork);
&blk->bp, args->whichfork);
if (error) {
blk->blkno = 0;
state->path.active--;
@ -1804,7 +1823,7 @@ xfs_da3_blk_link(
if (old_info->back) {
error = xfs_da3_node_read(args->trans, dp,
be32_to_cpu(old_info->back),
-1, &bp, args->whichfork);
&bp, args->whichfork);
if (error)
return error;
ASSERT(bp != NULL);
@ -1825,7 +1844,7 @@ xfs_da3_blk_link(
if (old_info->forw) {
error = xfs_da3_node_read(args->trans, dp,
be32_to_cpu(old_info->forw),
-1, &bp, args->whichfork);
&bp, args->whichfork);
if (error)
return error;
ASSERT(bp != NULL);
@ -1884,7 +1903,7 @@ xfs_da3_blk_unlink(
if (drop_info->back) {
error = xfs_da3_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->back),
-1, &bp, args->whichfork);
&bp, args->whichfork);
if (error)
return error;
ASSERT(bp != NULL);
@ -1901,7 +1920,7 @@ xfs_da3_blk_unlink(
if (drop_info->forw) {
error = xfs_da3_node_read(args->trans, args->dp,
be32_to_cpu(drop_info->forw),
-1, &bp, args->whichfork);
&bp, args->whichfork);
if (error)
return error;
ASSERT(bp != NULL);
@ -1985,7 +2004,7 @@ xfs_da3_path_shift(
/*
* Read the next child block into a local buffer.
*/
error = xfs_da3_node_read(args->trans, dp, blkno, -1, &bp,
error = xfs_da3_node_read(args->trans, dp, blkno, &bp,
args->whichfork);
if (error)
return error;
@ -2263,7 +2282,7 @@ xfs_da3_swap_lastblock(
* Read the last block in the btree space.
*/
last_blkno = (xfs_dablk_t)lastoff - args->geo->fsbcount;
error = xfs_da3_node_read(tp, dp, last_blkno, -1, &last_buf, w);
error = xfs_da3_node_read(tp, dp, last_blkno, &last_buf, w);
if (error)
return error;
/*
@ -2300,7 +2319,7 @@ xfs_da3_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_da3_node_read(tp, dp, sib_blkno, -1, &sib_buf, w);
error = xfs_da3_node_read(tp, dp, sib_blkno, &sib_buf, w);
if (error)
goto done;
sib_info = sib_buf->b_addr;
@ -2320,7 +2339,7 @@ xfs_da3_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_da3_node_read(tp, dp, sib_blkno, -1, &sib_buf, w);
error = xfs_da3_node_read(tp, dp, sib_blkno, &sib_buf, w);
if (error)
goto done;
sib_info = sib_buf->b_addr;
@ -2342,7 +2361,7 @@ xfs_da3_swap_lastblock(
* Walk down the tree looking for the parent of the moved block.
*/
for (;;) {
error = xfs_da3_node_read(tp, dp, par_blkno, -1, &par_buf, w);
error = xfs_da3_node_read(tp, dp, par_blkno, &par_buf, w);
if (error)
goto done;
par_node = par_buf->b_addr;
@ -2388,7 +2407,7 @@ xfs_da3_swap_lastblock(
error = -EFSCORRUPTED;
goto done;
}
error = xfs_da3_node_read(tp, dp, par_blkno, -1, &par_buf, w);
error = xfs_da3_node_read(tp, dp, par_blkno, &par_buf, w);
if (error)
goto done;
par_node = par_buf->b_addr;

6
fs/xfs/libxfs/xfs_da_btree.h
View File

@ -188,8 +188,10 @@ int xfs_da3_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
int xfs_da3_blk_link(xfs_da_state_t *state, xfs_da_state_blk_t *old_blk,
xfs_da_state_blk_t *new_blk);
int xfs_da3_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);
xfs_dablk_t bno, struct xfs_buf **bpp, int whichfork);
int xfs_da3_node_read_mapped(struct xfs_trans *tp, struct xfs_inode *dp,
xfs_daddr_t mappedbno, struct xfs_buf **bpp,
int whichfork);
/*
* Utility routines.

8
fs/xfs/xfs_attr_inactive.c
View File

@ -233,7 +233,7 @@ xfs_attr3_node_inactive(
* traversal of the tree so we may deal with many blocks
* before we come back to this one.
*/
error = xfs_da3_node_read(*trans, dp, child_fsb, -1, &child_bp,
error = xfs_da3_node_read(*trans, dp, child_fsb, &child_bp,
XFS_ATTR_FORK);
if (error)
return error;
@ -280,8 +280,8 @@ xfs_attr3_node_inactive(
if (i + 1 < ichdr.count) {
struct xfs_da3_icnode_hdr phdr;
error = xfs_da3_node_read(*trans, dp, 0, parent_blkno,
&bp, XFS_ATTR_FORK);
error = xfs_da3_node_read_mapped(*trans, dp,
parent_blkno, &bp, XFS_ATTR_FORK);
if (error)
return error;
xfs_da3_node_hdr_from_disk(dp->i_mount, &phdr,
@ -322,7 +322,7 @@ xfs_attr3_root_inactive(
* the extents in reverse order the extent containing
* block 0 must still be there.
*/
error = xfs_da3_node_read(*trans, dp, 0, -1, &bp, XFS_ATTR_FORK);
error = xfs_da3_node_read(*trans, dp, 0, &bp, XFS_ATTR_FORK);
if (error)
return error;
blkno = bp->b_bn;

6
fs/xfs/xfs_attr_list.c
View File

@ -223,7 +223,7 @@ xfs_attr_node_list_lookup(
ASSERT(*pbp == NULL);
cursor->blkno = 0;
for (;;) {
error = xfs_da3_node_read(tp, dp, cursor->blkno, -1, &bp,
error = xfs_da3_node_read(tp, dp, cursor->blkno, &bp,
XFS_ATTR_FORK);
if (error)
return error;
@ -309,8 +309,8 @@ xfs_attr_node_list(
*/
bp = NULL;
if (cursor->blkno > 0) {
error = xfs_da3_node_read(context->tp, dp, cursor->blkno, -1,
&bp, XFS_ATTR_FORK);
error = xfs_da3_node_read(context->tp, dp, cursor->blkno, &bp,
XFS_ATTR_FORK);
if ((error != 0) && (error != -EFSCORRUPTED))
return error;
if (bp) {