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xfs: remove xfs_btree_bigkey

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Remove the xfs_btree_bigkey mess and simply make xfs_btree_key big enough
to hold both keys in-core.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2016-09-19 10:24:36 +10:00 committed by Dave Chinner
parent cd00158ce3
commit a1d46cffaf
2 changed files with 12 additions and 24 deletions
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12
fs/xfs/libxfs/xfs_btree.c
View file

@ -2070,7 +2070,7 @@ __xfs_btree_updkeys(
struct xfs_buf *bp0,
bool force_all)
{
union xfs_btree_bigkey key; /* keys from current level */
union xfs_btree_key key; /* keys from current level */
union xfs_btree_key *lkey; /* keys from the next level up */
union xfs_btree_key *hkey;
union xfs_btree_key *nlkey; /* keys from the next level up */
@ -2086,7 +2086,7 @@ __xfs_btree_updkeys(
trace_xfs_btree_updkeys(cur, level, bp0);
lkey = (union xfs_btree_key *)&key;
lkey = &key;
hkey = xfs_btree_high_key_from_key(cur, lkey);
xfs_btree_get_keys(cur, block, lkey);
for (level++; level < cur->bc_nlevels; level++) {
@ -3226,7 +3226,7 @@ xfs_btree_insrec(
struct xfs_buf *bp; /* buffer for block */
union xfs_btree_ptr nptr; /* new block ptr */
struct xfs_btree_cur *ncur; /* new btree cursor */
union xfs_btree_bigkey nkey; /* new block key */
union xfs_btree_key nkey; /* new block key */
union xfs_btree_key *lkey;
int optr; /* old key/record index */
int ptr; /* key/record index */
@ -3241,7 +3241,7 @@ xfs_btree_insrec(
XFS_BTREE_TRACE_ARGIPR(cur, level, *ptrp, &rec);
ncur = NULL;
lkey = (union xfs_btree_key *)&nkey;
lkey = &nkey;
/*
* If we have an external root pointer, and we've made it to the
@ -3444,14 +3444,14 @@ xfs_btree_insert(
union xfs_btree_ptr nptr; /* new block number (split result) */
struct xfs_btree_cur *ncur; /* new cursor (split result) */
struct xfs_btree_cur *pcur; /* previous level's cursor */
union xfs_btree_bigkey bkey; /* key of block to insert */
union xfs_btree_key bkey; /* key of block to insert */
union xfs_btree_key *key;
union xfs_btree_rec rec; /* record to insert */
level = 0;
ncur = NULL;
pcur = cur;
key = (union xfs_btree_key *)&bkey;
key = &bkey;
xfs_btree_set_ptr_null(cur, &nptr);

24
fs/xfs/libxfs/xfs_btree.h
View file

@ -37,30 +37,18 @@ union xfs_btree_ptr {
__be64 l; /* long form ptr */
};
/*
* The in-core btree key. Overlapping btrees actually store two keys
* per pointer, so we reserve enough memory to hold both. The __*bigkey
* items should never be accessed directly.
*/
union xfs_btree_key {
struct xfs_bmbt_key bmbt;
xfs_bmdr_key_t bmbr; /* bmbt root block */
xfs_alloc_key_t alloc;
struct xfs_inobt_key inobt;
struct xfs_rmap_key rmap;
};
/*
* In-core key that holds both low and high keys for overlapped btrees.
* The two keys are packed next to each other on disk, so do the same
* in memory. Preserve the existing xfs_btree_key as a single key to
* avoid the mental model breakage that would happen if we passed a
* bigkey into a function that operates on a single key.
*/
union xfs_btree_bigkey {
struct xfs_bmbt_key bmbt;
xfs_bmdr_key_t bmbr; /* bmbt root block */
xfs_alloc_key_t alloc;
struct xfs_inobt_key inobt;
struct {
struct xfs_rmap_key rmap;
struct xfs_rmap_key rmap_hi;
};
struct xfs_rmap_key __rmap_bigkey[2];
};
union xfs_btree_rec {