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xfs: add CRC checking to dir2 leaf blocks

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This addition follows the same pattern as the dir2 block CRCs.
Seeing as both LEAF1 and LEAFN types need to changed at the same
time, this is a pretty large amount of change. leaf block headers
need to be abstracted away from the on-disk structures (struct
xfs_dir3_icleaf_hdr), as do the base leaf entry locations.

This header abstract allows the in-core header and leaf entry
location to be passed around instead of the leaf block itself. This
saves a lot of converting individual variables from on-disk format
to host format where they are used, so there's a good chance that
the compiler will be able to produce much more optimal code as it's
not having to byteswap variables all over the place.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
tirimbino
Dave Chinner 12 years ago committed by Ben Myers
parent 33363feed1
commit 24df33b45e
7 changed files with 924 additions and 522 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 45
      fs/xfs/xfs_da_btree.c
  2. 23
      fs/xfs/xfs_da_btree.h
  3. 19
      fs/xfs/xfs_dir2_block.c
  4. 60
      fs/xfs/xfs_dir2_format.h
  5. 792
      fs/xfs/xfs_dir2_leaf.c
  6. 475
      fs/xfs/xfs_dir2_node.c
  7. 32
      fs/xfs/xfs_dir2_priv.h

45
fs/xfs/xfs_da_btree.c
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@ -139,7 +139,8 @@ xfs_da_node_read_verify(
bp->b_ops->verify_read(bp);
return;
case XFS_DIR2_LEAFN_MAGIC:
bp->b_ops = &xfs_dir2_leafn_buf_ops;
case XFS_DIR3_LEAFN_MAGIC:
bp->b_ops = &xfs_dir3_leafn_buf_ops;
bp->b_ops->verify_read(bp);
return;
default:
@ -396,11 +397,18 @@ xfs_da_root_split(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
size = (int)((char *)&oldroot->btree[be16_to_cpu(oldroot->hdr.count)] -
(char *)oldroot);
} else {
ASSERT(oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
struct xfs_dir3_icleaf_hdr leafhdr;
struct xfs_dir2_leaf_entry *ents;
leaf = (xfs_dir2_leaf_t *)oldroot;
size = (int)((char *)&leaf->ents[be16_to_cpu(leaf->hdr.count)] -
(char *)leaf);
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC ||
leafhdr.magic == XFS_DIR3_LEAFN_MAGIC);
size = (int)((char *)&ents[leafhdr.count] - (char *)leaf);
}
/* XXX: can't just copy CRC headers from one block to another */
memcpy(node, oldroot, size);
xfs_trans_log_buf(tp, bp, 0, size - 1);
@ -424,7 +432,8 @@ xfs_da_root_split(xfs_da_state_t *state, xfs_da_state_blk_t *blk1,
node->hdr.count = cpu_to_be16(2);
#ifdef DEBUG
if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)) {
if (oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
oldroot->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) {
ASSERT(blk1->blkno >= mp->m_dirleafblk &&
blk1->blkno < mp->m_dirfreeblk);
ASSERT(blk2->blkno >= mp->m_dirleafblk &&
@ -782,6 +791,7 @@ xfs_da_blkinfo_onlychild_validate(struct xfs_da_blkinfo *blkinfo, __u16 level)
if (level == 1) {
ASSERT(magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC) ||
magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
} else
ASSERT(magic == cpu_to_be16(XFS_DA_NODE_MAGIC));
@ -1565,6 +1575,7 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
info = blk->bp->b_addr;
ASSERT(info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC) ||
info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
info->magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC) ||
info->magic == cpu_to_be16(XFS_ATTR_LEAF_MAGIC));
blk->magic = be16_to_cpu(info->magic);
if (blk->magic == XFS_DA_NODE_MAGIC) {
@ -1584,12 +1595,13 @@ xfs_da_path_shift(xfs_da_state_t *state, xfs_da_state_path_t *path,
NULL);
break;
case XFS_DIR2_LEAFN_MAGIC:
case XFS_DIR3_LEAFN_MAGIC:
blk->magic = XFS_DIR2_LEAFN_MAGIC;
blk->hashval = xfs_dir2_leafn_lasthash(blk->bp,
NULL);
break;
default:
ASSERT(blk->magic == XFS_ATTR_LEAF_MAGIC ||
blk->magic == XFS_DIR2_LEAFN_MAGIC);
ASSERT(0);
break;
}
}
@ -1833,10 +1845,16 @@ xfs_da_swap_lastblock(
/*
* Get values from the moved block.
*/
if (dead_info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC)) {
if (dead_info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC) ||
dead_info->magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) {
struct xfs_dir3_icleaf_hdr leafhdr;
struct xfs_dir2_leaf_entry *ents;
dead_leaf2 = (xfs_dir2_leaf_t *)dead_info;
xfs_dir3_leaf_hdr_from_disk(&leafhdr, dead_leaf2);
ents = xfs_dir3_leaf_ents_p(dead_leaf2);
dead_level = 0;
dead_hash = be32_to_cpu(dead_leaf2->ents[be16_to_cpu(dead_leaf2->hdr.count) - 1].hashval);
dead_hash = be32_to_cpu(ents[leafhdr.count - 1].hashval);
} else {
ASSERT(dead_info->magic == cpu_to_be16(XFS_DA_NODE_MAGIC));
dead_node = (xfs_da_intnode_t *)dead_info;
@ -2281,10 +2299,17 @@ xfs_da_read_buf(
XFS_TEST_ERROR((magic != XFS_DA_NODE_MAGIC) &&
(magic != XFS_ATTR_LEAF_MAGIC) &&
(magic != XFS_DIR2_LEAF1_MAGIC) &&
(magic != XFS_DIR3_LEAF1_MAGIC) &&
(magic != XFS_DIR2_LEAFN_MAGIC) &&
(magic != XFS_DIR3_LEAFN_MAGIC) &&
(magic1 != XFS_DIR2_BLOCK_MAGIC) &&
(magic1 != XFS_DIR3_BLOCK_MAGIC) &&
(magic1 != XFS_DIR2_DATA_MAGIC) &&
(free->hdr.magic != cpu_to_be32(XFS_DIR2_FREE_MAGIC)),
(magic1 != XFS_DIR3_DATA_MAGIC) &&
(free->hdr.magic !=
cpu_to_be32(XFS_DIR2_FREE_MAGIC)) &&
(free->hdr.magic !=
cpu_to_be32(XFS_DIR3_FREE_MAGIC)),
mp, XFS_ERRTAG_DA_READ_BUF,
XFS_RANDOM_DA_READ_BUF))) {
trace_xfs_da_btree_corrupt(bp, _RET_IP_);

23
fs/xfs/xfs_da_btree.h
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@ -46,6 +46,29 @@ typedef struct xfs_da_blkinfo {
__be16 pad; /* unused */
} xfs_da_blkinfo_t;
/*
* CRC enabled directory structure types
*
* The headers change size for the additional verification information, but
* otherwise the tree layouts and contents are unchanged.
*/
#define XFS_DIR3_LEAF1_MAGIC 0x3df1 /* magic number: v2 dirlf single blks */
#define XFS_DIR3_LEAFN_MAGIC 0x3dff /* magic number: v2 dirlf multi blks */
struct xfs_da3_blkinfo {
/*
* the node link manipulation code relies on the fact that the first
* element of this structure is the struct xfs_da_blkinfo so it can
* ignore the differences in the rest of the structures.
*/
struct xfs_da_blkinfo hdr;
__be32 crc; /* CRC of block */
__be64 blkno; /* first block of the buffer */
__be64 lsn; /* sequence number of last write */
uuid_t uuid; /* filesystem we belong to */
__be64 owner; /* inode that owns the block */
};
/*
* This is the structure of the root and intermediate nodes in the Btree.
* The leaf nodes are defined above.

19
fs/xfs/xfs_dir2_block.c
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@ -1013,6 +1013,8 @@ xfs_dir2_leaf_to_block(
__be16 *tagp; /* end of entry (tag) */
int to; /* block/leaf to index */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_dir2_leaf_entry *ents;
struct xfs_dir3_icleaf_hdr leafhdr;
trace_xfs_dir2_leaf_to_block(args);
@ -1020,8 +1022,12 @@ xfs_dir2_leaf_to_block(
tp = args->trans;
mp = dp->i_mount;
leaf = lbp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC));
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
ltp = xfs_dir2_leaf_tail_p(mp, leaf);
ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
/*
* If there are data blocks other than the first one, take this
* opportunity to remove trailing empty data blocks that may have
@ -1058,7 +1064,7 @@ xfs_dir2_leaf_to_block(
* Size of the "leaf" area in the block.
*/
size = (uint)sizeof(xfs_dir2_block_tail_t) +
(uint)sizeof(*lep) * (be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale));
(uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale);
/*
* Look at the last data entry.
*/
@ -1087,18 +1093,17 @@ xfs_dir2_leaf_to_block(
* Initialize the block tail.
*/
btp = xfs_dir2_block_tail_p(mp, hdr);
btp->count = cpu_to_be32(be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale));
btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale);
btp->stale = 0;
xfs_dir2_block_log_tail(tp, dbp);
/*
* Initialize the block leaf area. We compact out stale entries.
*/
lep = xfs_dir2_block_leaf_p(btp);
for (from = to = 0; from < be16_to_cpu(leaf->hdr.count); from++) {
if (leaf->ents[from].address ==
cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
for (from = to = 0; from < leafhdr.count; from++) {
if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
continue;
lep[to++] = leaf->ents[from];
lep[to++] = ents[from];
}
ASSERT(to == be32_to_cpu(btp->count));
xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1);

60
fs/xfs/xfs_dir2_format.h
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@ -470,6 +470,21 @@ typedef struct xfs_dir2_leaf_hdr {
__be16 stale; /* count of stale entries */
} xfs_dir2_leaf_hdr_t;
struct xfs_dir3_leaf_hdr {
struct xfs_da3_blkinfo info; /* header for da routines */
__be16 count; /* count of entries */
__be16 stale; /* count of stale entries */
__be32 pad;
};
struct xfs_dir3_icleaf_hdr {
__uint32_t forw;
__uint32_t back;
__uint16_t magic;
__uint16_t count;
__uint16_t stale;
};
/*
* Leaf block entry.
*/
@ -489,20 +504,47 @@ typedef struct xfs_dir2_leaf_tail {
* Leaf block.
*/
typedef struct xfs_dir2_leaf {
xfs_dir2_leaf_hdr_t hdr; /* leaf header */
xfs_dir2_leaf_entry_t ents[]; /* entries */
xfs_dir2_leaf_hdr_t hdr; /* leaf header */
xfs_dir2_leaf_entry_t __ents[]; /* entries */
} xfs_dir2_leaf_t;
/*
* DB blocks here are logical directory block numbers, not filesystem blocks.
*/
struct xfs_dir3_leaf {
struct xfs_dir3_leaf_hdr hdr; /* leaf header */
struct xfs_dir2_leaf_entry __ents[]; /* entries */
};
#define XFS_DIR3_LEAF_CRC_OFF offsetof(struct xfs_dir3_leaf_hdr, info.crc)
static inline int
xfs_dir3_leaf_hdr_size(struct xfs_dir2_leaf *lp)
{
if (lp->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) ||
lp->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC))
return sizeof(struct xfs_dir3_leaf_hdr);
return sizeof(struct xfs_dir2_leaf_hdr);
}
static inline int xfs_dir2_max_leaf_ents(struct xfs_mount *mp)
static inline int
xfs_dir3_max_leaf_ents(struct xfs_mount *mp, struct xfs_dir2_leaf *lp)
{
return (mp->m_dirblksize - (uint)sizeof(struct xfs_dir2_leaf_hdr)) /
return (mp->m_dirblksize - xfs_dir3_leaf_hdr_size(lp)) /
(uint)sizeof(struct xfs_dir2_leaf_entry);
}
/*
* Get address of the bestcount field in the single-leaf block.
*/
static inline struct xfs_dir2_leaf_entry *
xfs_dir3_leaf_ents_p(struct xfs_dir2_leaf *lp)
{
if (lp->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) ||
lp->hdr.info.magic == cpu_to_be16(XFS_DIR3_LEAFN_MAGIC)) {
struct xfs_dir3_leaf *lp3 = (struct xfs_dir3_leaf *)lp;
return lp3->__ents;
}
return lp->__ents;
}
/*
* Get address of the bestcount field in the single-leaf block.
*/
@ -523,6 +565,10 @@ xfs_dir2_leaf_bests_p(struct xfs_dir2_leaf_tail *ltp)
return (__be16 *)ltp - be32_to_cpu(ltp->bestcount);
}
/*
* DB blocks here are logical directory block numbers, not filesystem blocks.
*/
/*
* Convert dataptr to byte in file space
*/

792
fs/xfs/xfs_dir2_leaf.c
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File diff suppressed because it is too large Load Diff

475
fs/xfs/xfs_dir2_node.c
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@ -41,14 +41,6 @@
*/
static int xfs_dir2_leafn_add(struct xfs_buf *bp, xfs_da_args_t *args,
int index);
#ifdef DEBUG
static void xfs_dir2_leafn_check(struct xfs_inode *dp, struct xfs_buf *bp);
#else
#define xfs_dir2_leafn_check(dp, bp)
#endif
static void xfs_dir2_leafn_moveents(xfs_da_args_t *args, struct xfs_buf *bp_s,
int start_s, struct xfs_buf *bp_d,
int start_d, int count);
static void xfs_dir2_leafn_rebalance(xfs_da_state_t *state,
xfs_da_state_blk_t *blk1,
xfs_da_state_blk_t *blk2);
@ -58,6 +50,39 @@ static int xfs_dir2_leafn_remove(xfs_da_args_t *args, struct xfs_buf *bp,
static int xfs_dir2_node_addname_int(xfs_da_args_t *args,
xfs_da_state_blk_t *fblk);
/*
* Check internal consistency of a leafn block.
*/
#ifdef DEBUG
#define xfs_dir3_leaf_check(mp, bp) \
do { \
if (!xfs_dir3_leafn_check((mp), (bp))) \
ASSERT(0); \
} while (0);
static bool
xfs_dir3_leafn_check(
struct xfs_mount *mp,
struct xfs_buf *bp)
{
struct xfs_dir2_leaf *leaf = bp->b_addr;
struct xfs_dir3_icleaf_hdr leafhdr;
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
if (leafhdr.magic == XFS_DIR3_LEAFN_MAGIC) {
struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
return false;
} else if (leafhdr.magic != XFS_DIR2_LEAFN_MAGIC)
return false;
return xfs_dir3_leaf_check_int(mp, &leafhdr, leaf);
}
#else
#define xfs_dir3_leaf_check(mp, bp)
#endif
static bool
xfs_dir3_free_verify(
struct xfs_buf *bp)
@ -360,11 +385,19 @@ xfs_dir2_leaf_to_node(
xfs_dir2_free_log_bests(tp, fbp, 0, freehdr.nvalid - 1);
xfs_dir2_free_log_header(tp, fbp);
/* convert the leaf to a leafnode */
leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
lbp->b_ops = &xfs_dir2_leafn_buf_ops;
xfs_dir2_leaf_log_header(tp, lbp);
xfs_dir2_leafn_check(dp, lbp);
/*
* Converting the leaf to a leafnode is just a matter of changing the
* magic number and the ops. Do the change directly to the buffer as
* it's less work (and less code) than decoding the header to host
* format and back again.
*/
if (leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAF1_MAGIC))
leaf->hdr.info.magic = cpu_to_be16(XFS_DIR2_LEAFN_MAGIC);
else
leaf->hdr.info.magic = cpu_to_be16(XFS_DIR3_LEAFN_MAGIC);
lbp->b_ops = &xfs_dir3_leafn_buf_ops;
xfs_dir3_leaf_log_header(tp, lbp);
xfs_dir3_leaf_check(mp, lbp);
return 0;
}
@ -388,6 +421,8 @@ xfs_dir2_leafn_add(
int lowstale; /* previous stale entry */
xfs_mount_t *mp; /* filesystem mount point */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_dir3_icleaf_hdr leafhdr;
struct xfs_dir2_leaf_entry *ents;
trace_xfs_dir2_leafn_add(args, index);
@ -395,6 +430,8 @@ xfs_dir2_leafn_add(
mp = dp->i_mount;
tp = args->trans;
leaf = bp->b_addr;
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
/*
* Quick check just to make sure we are not going to index
@ -410,15 +447,15 @@ xfs_dir2_leafn_add(
* a compact.
*/
if (be16_to_cpu(leaf->hdr.count) == xfs_dir2_max_leaf_ents(mp)) {
if (!leaf->hdr.stale)
if (leafhdr.count == xfs_dir3_max_leaf_ents(mp, leaf)) {
if (!leafhdr.stale)
return XFS_ERROR(ENOSPC);
compact = be16_to_cpu(leaf->hdr.stale) > 1;
compact = leafhdr.stale > 1;
} else
compact = 0;
ASSERT(index == 0 || be32_to_cpu(leaf->ents[index - 1].hashval) <= args->hashval);
ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
be32_to_cpu(leaf->ents[index].hashval) >= args->hashval);
ASSERT(index == 0 || be32_to_cpu(ents[index - 1].hashval) <= args->hashval);
ASSERT(index == leafhdr.count ||
be32_to_cpu(ents[index].hashval) >= args->hashval);
if (args->op_flags & XFS_DA_OP_JUSTCHECK)
return 0;
@ -427,62 +464,35 @@ xfs_dir2_leafn_add(
* Compact out all but one stale leaf entry. Leaves behind
* the entry closest to index.
*/
if (compact) {
xfs_dir2_leaf_compact_x1(bp, &index, &lowstale, &highstale,
&lfloglow, &lfloghigh);
}
/*
* Set impossible logging indices for this case.
*/
else if (leaf->hdr.stale) {
lfloglow = be16_to_cpu(leaf->hdr.count);
if (compact)
xfs_dir3_leaf_compact_x1(&leafhdr, ents, &index, &lowstale,
&highstale, &lfloglow, &lfloghigh);
else if (leafhdr.stale) {
/*
* Set impossible logging indices for this case.
*/
lfloglow = leafhdr.count;
lfloghigh = -1;
}
/*
* Insert the new entry, log everything.
*/
lep = xfs_dir2_leaf_find_entry(leaf, index, compact, lowstale,
lep = xfs_dir3_leaf_find_entry(&leafhdr, ents, index, compact, lowstale,
highstale, &lfloglow, &lfloghigh);
lep->hashval = cpu_to_be32(args->hashval);
lep->address = cpu_to_be32(xfs_dir2_db_off_to_dataptr(mp,
args->blkno, args->index));
xfs_dir2_leaf_log_header(tp, bp);
xfs_dir2_leaf_log_ents(tp, bp, lfloglow, lfloghigh);
xfs_dir2_leafn_check(dp, bp);
xfs_dir3_leaf_hdr_to_disk(leaf, &leafhdr);
xfs_dir3_leaf_log_header(tp, bp);
xfs_dir3_leaf_log_ents(tp, bp, lfloglow, lfloghigh);
xfs_dir3_leaf_check(mp, bp);
return 0;
}
#ifdef DEBUG
/*
* Check internal consistency of a leafn block.
*/
void
xfs_dir2_leafn_check(
struct xfs_inode *dp,
struct xfs_buf *bp)
{
int i; /* leaf index */
xfs_dir2_leaf_t *leaf; /* leaf structure */
xfs_mount_t *mp; /* filesystem mount point */
int stale; /* count of stale leaves */
leaf = bp->b_addr;
mp = dp->i_mount;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
ASSERT(be16_to_cpu(leaf->hdr.count) <= xfs_dir2_max_leaf_ents(mp));
for (i = stale = 0; i < be16_to_cpu(leaf->hdr.count); i++) {
if (i + 1 < be16_to_cpu(leaf->hdr.count)) {
ASSERT(be32_to_cpu(leaf->ents[i].hashval) <=
be32_to_cpu(leaf->ents[i + 1].hashval));
}
if (leaf->ents[i].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
stale++;
}
ASSERT(be16_to_cpu(leaf->hdr.stale) == stale);
}
static void
xfs_dir2_free_hdr_check(
struct xfs_mount *mp,
@ -510,15 +520,22 @@ xfs_dir2_leafn_lasthash(
struct xfs_buf *bp, /* leaf buffer */
int *count) /* count of entries in leaf */
{
xfs_dir2_leaf_t *leaf; /* leaf structure */
struct xfs_dir2_leaf *leaf = bp->b_addr;
struct xfs_dir2_leaf_entry *ents;
struct xfs_dir3_icleaf_hdr leafhdr;
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ASSERT(leafhdr.magic == XFS_DIR2_LEAFN_MAGIC ||
leafhdr.magic == XFS_DIR3_LEAFN_MAGIC);
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
if (count)
*count = be16_to_cpu(leaf->hdr.count);
if (!leaf->hdr.count)
*count = leafhdr.count;
if (!leafhdr.count)
return 0;
return be32_to_cpu(leaf->ents[be16_to_cpu(leaf->hdr.count) - 1].hashval);
ents = xfs_dir3_leaf_ents_p(leaf);
return be32_to_cpu(ents[leafhdr.count - 1].hashval);
}
/*
@ -547,16 +564,19 @@ xfs_dir2_leafn_lookup_for_addname(
xfs_dir2_db_t newdb; /* new data block number */
xfs_dir2_db_t newfdb; /* new free block number */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_dir2_leaf_entry *ents;
struct xfs_dir3_icleaf_hdr leafhdr;
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
#ifdef __KERNEL__
ASSERT(be16_to_cpu(leaf->hdr.count) > 0);
#endif
xfs_dir2_leafn_check(dp, bp);
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
xfs_dir3_leaf_check(mp, bp);
ASSERT(leafhdr.count > 0);
/*
* Look up the hash value in the leaf entries.
*/
@ -576,9 +596,9 @@ xfs_dir2_leafn_lookup_for_addname(
/*
* Loop over leaf entries with the right hash value.
*/
for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
be32_to_cpu(lep->hashval) == args->hashval;
lep++, index++) {
for (lep = &ents[index];
index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
lep++, index++) {
/*
* Skip stale leaf entries.
*/
@ -694,16 +714,19 @@ xfs_dir2_leafn_lookup_for_entry(
xfs_dir2_db_t newdb; /* new data block number */
xfs_trans_t *tp; /* transaction pointer */
enum xfs_dacmp cmp; /* comparison result */
struct xfs_dir2_leaf_entry *ents;
struct xfs_dir3_icleaf_hdr leafhdr;
dp = args->dp;
tp = args->trans;
mp = dp->i_mount;
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
#ifdef __KERNEL__
ASSERT(be16_to_cpu(leaf->hdr.count) > 0);
#endif
xfs_dir2_leafn_check(dp, bp);
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
xfs_dir3_leaf_check(mp, bp);
ASSERT(leafhdr.count > 0);
/*
* Look up the hash value in the leaf entries.
*/
@ -718,9 +741,9 @@ xfs_dir2_leafn_lookup_for_entry(
/*
* Loop over leaf entries with the right hash value.
*/
for (lep = &leaf->ents[index]; index < be16_to_cpu(leaf->hdr.count) &&
be32_to_cpu(lep->hashval) == args->hashval;
lep++, index++) {
for (lep = &ents[index];
index < leafhdr.count && be32_to_cpu(lep->hashval) == args->hashval;
lep++, index++) {
/*
* Skip stale leaf entries.
*/
@ -792,8 +815,7 @@ xfs_dir2_leafn_lookup_for_entry(
return XFS_ERROR(EEXIST);
}
}
ASSERT(index == be16_to_cpu(leaf->hdr.count) ||
(args->op_flags & XFS_DA_OP_OKNOENT));
ASSERT(index == leafhdr.count || (args->op_flags & XFS_DA_OP_OKNOENT));
if (curbp) {
if (args->cmpresult == XFS_CMP_DIFFERENT) {
/* Giving back last used data block. */
@ -838,52 +860,50 @@ xfs_dir2_leafn_lookup_int(
* Log entries and headers. Stale entries are preserved.
*/
static void
xfs_dir2_leafn_moveents(
xfs_da_args_t *args, /* operation arguments */
struct xfs_buf *bp_s, /* source leaf buffer */
int start_s, /* source leaf index */
struct xfs_buf *bp_d, /* destination leaf buffer */
int start_d, /* destination leaf index */
int count) /* count of leaves to copy */
xfs_dir3_leafn_moveents(
xfs_da_args_t *args, /* operation arguments */
struct xfs_buf *bp_s, /* source */
struct xfs_dir3_icleaf_hdr *shdr,
struct xfs_dir2_leaf_entry *sents,
int start_s,/* source leaf index */
struct xfs_buf *bp_d, /* destination */
struct xfs_dir3_icleaf_hdr *dhdr,
struct xfs_dir2_leaf_entry *dents,
int start_d,/* destination leaf index */
int count) /* count of leaves to copy */
{
xfs_dir2_leaf_t *leaf_d; /* destination leaf structure */
xfs_dir2_leaf_t *leaf_s; /* source leaf structure */
int stale; /* count stale leaves copied */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_trans *tp = args->trans;
int stale; /* count stale leaves copied */
trace_xfs_dir2_leafn_moveents(args, start_s, start_d, count);
/*
* Silently return if nothing to do.
*/
if (count == 0) {
if (count == 0)
return;
}
tp = args->trans;
leaf_s = bp_s->b_addr;
leaf_d = bp_d->b_addr;
/*
* If the destination index is not the end of the current
* destination leaf entries, open up a hole in the destination
* to hold the new entries.
*/
if (start_d < be16_to_cpu(leaf_d->hdr.count)) {
memmove(&leaf_d->ents[start_d + count], &leaf_d->ents[start_d],
(be16_to_cpu(leaf_d->hdr.count) - start_d) *
sizeof(xfs_dir2_leaf_entry_t));
xfs_dir2_leaf_log_ents(tp, bp_d, start_d + count,
count + be16_to_cpu(leaf_d->hdr.count) - 1);
if (start_d < dhdr->count) {
memmove(&dents[start_d + count], &dents[start_d],
(dhdr->count - start_d) * sizeof(xfs_dir2_leaf_entry_t));
xfs_dir3_leaf_log_ents(tp, bp_d, start_d + count,
count + dhdr->count - 1);
}
/*
* If the source has stale leaves, count the ones in the copy range
* so we can update the header correctly.
*/
if (leaf_s->hdr.stale) {
if (shdr->stale) {
int i; /* temp leaf index */
for (i = start_s, stale = 0; i < start_s + count; i++) {
if (leaf_s->ents[i].address ==
cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
if (sents[i].address ==
cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
stale++;
}
} else
@ -891,29 +911,27 @@ xfs_dir2_leafn_moveents(
/*
* Copy the leaf entries from source to destination.
*/
memcpy(&leaf_d->ents[start_d], &leaf_s->ents[start_s],
memcpy(&dents[start_d], &sents[start_s],
count * sizeof(xfs_dir2_leaf_entry_t));
xfs_dir2_leaf_log_ents(tp, bp_d, start_d, start_d + count - 1);
xfs_dir3_leaf_log_ents(tp, bp_d, start_d, start_d + count - 1);
/*
* If there are source entries after the ones we copied,
* delete the ones we copied by sliding the next ones down.
*/
if (start_s + count < be16_to_cpu(leaf_s->hdr.count)) {
memmove(&leaf_s->ents[start_s], &leaf_s->ents[start_s + count],
if (start_s + count < shdr->count) {
memmove(&sents[start_s], &sents[start_s + count],
count * sizeof(xfs_dir2_leaf_entry_t));
xfs_dir2_leaf_log_ents(tp, bp_s, start_s, start_s + count - 1);
xfs_dir3_leaf_log_ents(tp, bp_s, start_s, start_s + count - 1);
}
/*
* Update the headers and log them.
*/
be16_add_cpu(&leaf_s->hdr.count, -(count));
be16_add_cpu(&leaf_s->hdr.stale, -(stale));
be16_add_cpu(&leaf_d->hdr.count, count);
be16_add_cpu(&leaf_d->hdr.stale, stale);
xfs_dir2_leaf_log_header(tp, bp_s);
xfs_dir2_leaf_log_header(tp, bp_d);
xfs_dir2_leafn_check(args->dp, bp_s);
xfs_dir2_leafn_check(args->dp, bp_d);
shdr->count -= count;
shdr->stale -= stale;
dhdr->count += count;
dhdr->stale += stale;
}
/*
@ -922,21 +940,25 @@ xfs_dir2_leafn_moveents(
*/
int /* sort order */
xfs_dir2_leafn_order(
struct xfs_buf *leaf1_bp, /* leaf1 buffer */
struct xfs_buf *leaf2_bp) /* leaf2 buffer */
struct xfs_buf *leaf1_bp, /* leaf1 buffer */
struct xfs_buf *leaf2_bp) /* leaf2 buffer */
{
xfs_dir2_leaf_t *leaf1; /* leaf1 structure */
xfs_dir2_leaf_t *leaf2; /* leaf2 structure */
leaf1 = leaf1_bp->b_addr;
leaf2 = leaf2_bp->b_addr;
ASSERT(leaf1->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
ASSERT(leaf2->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
if (be16_to_cpu(leaf1->hdr.count) > 0 &&
be16_to_cpu(leaf2->hdr.count) > 0 &&
(be32_to_cpu(leaf2->ents[0].hashval) < be32_to_cpu(leaf1->ents[0].hashval) ||
be32_to_cpu(leaf2->ents[be16_to_cpu(leaf2->hdr.count) - 1].hashval) <
be32_to_cpu(leaf1->ents[be16_to_cpu(leaf1->hdr.count) - 1].hashval)))
struct xfs_dir2_leaf *leaf1 = leaf1_bp->b_addr;
struct xfs_dir2_leaf *leaf2 = leaf2_bp->b_addr;
struct xfs_dir2_leaf_entry *ents1;
struct xfs_dir2_leaf_entry *ents2;
struct xfs_dir3_icleaf_hdr hdr1;
struct xfs_dir3_icleaf_hdr hdr2;
xfs_dir3_leaf_hdr_from_disk(&hdr1, leaf1);
xfs_dir3_leaf_hdr_from_disk(&hdr2, leaf2);
ents1 = xfs_dir3_leaf_ents_p(leaf1);
ents2 = xfs_dir3_leaf_ents_p(leaf2);
if (hdr1.count > 0 && hdr2.count > 0 &&
(be32_to_cpu(ents2[0].hashval) < be32_to_cpu(ents1[0].hashval) ||
be32_to_cpu(ents2[hdr2.count - 1].hashval) <
be32_to_cpu(ents1[hdr1.count - 1].hashval)))
return 1;
return 0;
}
@ -965,6 +987,10 @@ xfs_dir2_leafn_rebalance(
#endif
int oldsum; /* old total leaf count */
int swap; /* swapped leaf blocks */
struct xfs_dir2_leaf_entry *ents1;
struct xfs_dir2_leaf_entry *ents2;
struct xfs_dir3_icleaf_hdr hdr1;
struct xfs_dir3_icleaf_hdr hdr2;
args = state->args;
/*
@ -979,11 +1005,17 @@ xfs_dir2_leafn_rebalance(
}
leaf1 = blk1->bp->b_addr;
leaf2 = blk2->bp->b_addr;
oldsum = be16_to_cpu(leaf1->hdr.count) + be16_to_cpu(leaf2->hdr.count);
xfs_dir3_leaf_hdr_from_disk(&hdr1, leaf1);
xfs_dir3_leaf_hdr_from_disk(&hdr2, leaf2);
ents1 = xfs_dir3_leaf_ents_p(leaf1);
ents2 = xfs_dir3_leaf_ents_p(leaf2);
oldsum = hdr1.count + hdr2.count;
#ifdef DEBUG
oldstale = be16_to_cpu(leaf1->hdr.stale) + be16_to_cpu(leaf2->hdr.stale);
oldstale = hdr1.stale + hdr2.stale;
#endif
mid = oldsum >> 1;
/*
* If the old leaf count was odd then the new one will be even,
* so we need to divide the new count evenly.
@ -991,10 +1023,10 @@ xfs_dir2_leafn_rebalance(
if (oldsum & 1) {
xfs_dahash_t midhash; /* middle entry hash value */
if (mid >= be16_to_cpu(leaf1->hdr.count))
midhash = be32_to_cpu(leaf2->ents[mid - be16_to_cpu(leaf1->hdr.count)].hashval);
if (mid >= hdr1.count)
midhash = be32_to_cpu(ents2[mid - hdr1.count].hashval);
else
midhash = be32_to_cpu(leaf1->ents[mid].hashval);
midhash = be32_to_cpu(ents1[mid].hashval);
isleft = args->hashval <= midhash;
}
/*
@ -1008,30 +1040,42 @@ xfs_dir2_leafn_rebalance(
* Calculate moved entry count. Positive means left-to-right,
* negative means right-to-left. Then move the entries.
*/
count = be16_to_cpu(leaf1->hdr.count) - mid + (isleft == 0);
count = hdr1.count - mid + (isleft == 0);
if (count > 0)
xfs_dir2_leafn_moveents(args, blk1->bp,
be16_to_cpu(leaf1->hdr.count) - count, blk2->bp, 0, count);
xfs_dir3_leafn_moveents(args, blk1->bp, &hdr1, ents1,
hdr1.count - count, blk2->bp,
&hdr2, ents2, 0, count);
else if (count < 0)
xfs_dir2_leafn_moveents(args, blk2->bp, 0, blk1->bp,
be16_to_cpu(leaf1->hdr.count), count);
ASSERT(be16_to_cpu(leaf1->hdr.count) + be16_to_cpu(leaf2->hdr.count) == oldsum);
ASSERT(be16_to_cpu(leaf1->hdr.stale) + be16_to_cpu(leaf2->hdr.stale) == oldstale);
xfs_dir3_leafn_moveents(args, blk2->bp, &hdr2, ents2, 0,
blk1->bp, &hdr1, ents1,
hdr1.count, count);
ASSERT(hdr1.count + hdr2.count == oldsum);
ASSERT(hdr1.stale + hdr2.stale == oldstale);
/* log the changes made when moving the entries */
xfs_dir3_leaf_hdr_to_disk(leaf1, &hdr1);
xfs_dir3_leaf_hdr_to_disk(leaf2, &hdr2);
xfs_dir3_leaf_log_header(args->trans, blk1->bp);
xfs_dir3_leaf_log_header(args->trans, blk2->bp);
xfs_dir3_leaf_check(args->dp->i_mount, blk1->bp);
xfs_dir3_leaf_check(args->dp->i_mount, blk2->bp);
/*
* Mark whether we're inserting into the old or new leaf.
*/
if (be16_to_cpu(leaf1->hdr.count) < be16_to_cpu(leaf2->hdr.count))
if (hdr1.count < hdr2.count)
state->inleaf = swap;
else if (be16_to_cpu(leaf1->hdr.count) > be16_to_cpu(leaf2->hdr.count))
else if (hdr1.count > hdr2.count)
state->inleaf = !swap;
else
state->inleaf =
swap ^ (blk1->index <= be16_to_cpu(leaf1->hdr.count));
state->inleaf = swap ^ (blk1->index <= hdr1.count);
/*
* Adjust the expected index for insertion.
*/
if (!state->inleaf)
blk2->index = blk1->index - be16_to_cpu(leaf1->hdr.count);
blk2->index = blk1->index - hdr1.count;
/*
* Finally sanity check just to make sure we are not returning a
@ -1153,6 +1197,8 @@ xfs_dir2_leafn_remove(
int needscan; /* need to rescan data frees */
xfs_trans_t *tp; /* transaction pointer */
struct xfs_dir2_data_free *bf; /* bestfree table */
struct xfs_dir3_icleaf_hdr leafhdr;
struct xfs_dir2_leaf_entry *ents;
trace_xfs_dir2_leafn_remove(args, index);
@ -1160,11 +1206,14 @@ xfs_dir2_leafn_remove(
tp = args->trans;
mp = dp->i_mount;
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
/*
* Point to the entry we're removing.
*/
lep = &leaf->ents[index];
lep = &ents[index];
/*
* Extract the data block and offset from the entry.
*/
@ -1172,14 +1221,18 @@ xfs_dir2_leafn_remove(
ASSERT(dblk->blkno == db);
off = xfs_dir2_dataptr_to_off(mp, be32_to_cpu(lep->address));
ASSERT(dblk->index == off);
/*
* Kill the leaf entry by marking it stale.
* Log the leaf block changes.
*/
be16_add_cpu(&leaf->hdr.stale, 1);
xfs_dir2_leaf_log_header(tp, bp);
leafhdr.stale++;
xfs_dir3_leaf_hdr_to_disk(leaf, &leafhdr);
xfs_dir3_leaf_log_header(tp, bp);
lep->address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
xfs_dir2_leaf_log_ents(tp, bp, index, index);
xfs_dir3_leaf_log_ents(tp, bp, index, index);
/*
* Make the data entry free. Keep track of the longest freespace
* in the data block in case it changes.
@ -1267,15 +1320,13 @@ xfs_dir2_leafn_remove(
return error;
}
xfs_dir2_leafn_check(dp, bp);
xfs_dir3_leaf_check(mp, bp);
/*
* Return indication of whether this leaf block is empty enough
* to justify trying to join it with a neighbor.
*/
*rval =
((uint)sizeof(leaf->hdr) +
(uint)sizeof(leaf->ents[0]) *
(be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale))) <
*rval = (xfs_dir3_leaf_hdr_size(leaf) +
(uint)sizeof(ents[0]) * (leafhdr.count - leafhdr.stale)) <
mp->m_dir_magicpct;
return 0;
}
@ -1308,11 +1359,11 @@ xfs_dir2_leafn_split(
/*
* Initialize the new leaf block.
*/
error = xfs_dir2_leaf_init(args, xfs_dir2_da_to_db(mp, blkno),
&newblk->bp, XFS_DIR2_LEAFN_MAGIC);
if (error) {
error = xfs_dir3_leaf_get_buf(args, xfs_dir2_da_to_db(mp, blkno),
&newblk->bp, XFS_DIR2_LEAFN_MAGIC);
if (error)
return error;
}
newblk->blkno = blkno;
newblk->magic = XFS_DIR2_LEAFN_MAGIC;
/*
@ -1336,8 +1387,8 @@ xfs_dir2_leafn_split(
*/
oldblk->hashval = xfs_dir2_leafn_lasthash(oldblk->bp, NULL);
newblk->hashval = xfs_dir2_leafn_lasthash(newblk->bp, NULL);
xfs_dir2_leafn_check(args->dp, oldblk->bp);
xfs_dir2_leafn_check(args->dp, newblk->bp);
xfs_dir3_leaf_check(mp, oldblk->bp);
xfs_dir3_leaf_check(mp, newblk->bp);
return error;
}
@ -1363,9 +1414,10 @@ xfs_dir2_leafn_toosmall(
int error; /* error return value */
int forward; /* sibling block direction */
int i; /* sibling counter */
xfs_da_blkinfo_t *info; /* leaf block header */
xfs_dir2_leaf_t *leaf; /* leaf structure */
int rval; /* result from path_shift */
struct xfs_dir3_icleaf_hdr leafhdr;
struct xfs_dir2_leaf_entry *ents;
/*
* Check for the degenerate case of the block being over 50% full.
@ -1373,11 +1425,13 @@ xfs_dir2_leafn_toosmall(
* to coalesce with a sibling.
*/
blk = &state->path.blk[state->path.active - 1];
info = blk->bp->b_addr;
ASSERT(info->magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
leaf = (xfs_dir2_leaf_t *)info;
count = be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
bytes = (uint)sizeof(leaf->hdr) + count * (uint)sizeof(leaf->ents[0]);
leaf = blk->bp->b_addr;
xfs_dir3_leaf_hdr_from_disk(&leafhdr, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
xfs_dir3_leaf_check(state->args->dp->i_mount, blk->bp);
count = leafhdr.count - leafhdr.stale;
bytes = xfs_dir3_leaf_hdr_size(leaf) + count * sizeof(ents[0]);
if (bytes > (state->blocksize >> 1)) {
/*
* Blk over 50%, don't try to join.
@ -1396,7 +1450,7 @@ xfs_dir2_leafn_toosmall(
* Make altpath point to the block we want to keep and
* path point to the block we want to drop (this one).
*/
forward = (info->forw != 0);
forward = (leafhdr.forw != 0);
memcpy(&state->altpath, &state->path, sizeof(state->path));
error = xfs_da_path_shift(state, &state->altpath, forward, 0,
&rval);
@ -1412,15 +1466,17 @@ xfs_dir2_leafn_toosmall(
* We prefer coalescing with the lower numbered sibling so as
* to shrink a directory over time.
*/
forward = be32_to_cpu(info->forw) < be32_to_cpu(info->back);
forward = leafhdr.forw < leafhdr.back;
for (i = 0, bp = NULL; i < 2; forward = !forward, i++) {
blkno = forward ? be32_to_cpu(info->forw) : be32_to_cpu(info->back);
struct xfs_dir3_icleaf_hdr hdr2;
blkno = forward ? leafhdr.forw : leafhdr.back;
if (blkno == 0)
continue;
/*
* Read the sibling leaf block.
*/
error = xfs_dir2_leafn_read(state->args->trans, state->args->dp,
error = xfs_dir3_leafn_read(state->args->trans, state->args->dp,
blkno, -1, &bp);
if (error)
return error;
@ -1428,13 +1484,15 @@ xfs_dir2_leafn_toosmall(
/*
* Count bytes in the two blocks combined.
*/
leaf = (xfs_dir2_leaf_t *)info;
count = be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
count = leafhdr.count - leafhdr.stale;
bytes = state->blocksize - (state->blocksize >> 2);
leaf = bp->b_addr;
ASSERT(leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
count += be16_to_cpu(leaf->hdr.count) - be16_to_cpu(leaf->hdr.stale);
bytes -= count * (uint)sizeof(leaf->ents[0]);
xfs_dir3_leaf_hdr_from_disk(&hdr2, leaf);
ents = xfs_dir3_leaf_ents_p(leaf);
count += hdr2.count - hdr2.stale;
bytes -= count * sizeof(ents[0]);
/*
* Fits with at least 25% to spare.
*/
@ -1481,34 +1539,53 @@ xfs_dir2_leafn_unbalance(
xfs_da_args_t *args; /* operation arguments */
xfs_dir2_leaf_t *drop_leaf; /* dead leaf structure */
xfs_dir2_leaf_t *save_leaf; /* surviving leaf structure */
struct xfs_dir3_icleaf_hdr savehdr;
struct xfs_dir3_icleaf_hdr drophdr;
struct xfs_dir2_leaf_entry *sents;
struct xfs_dir2_leaf_entry *dents;
args = state->args;
ASSERT(drop_blk->magic == XFS_DIR2_LEAFN_MAGIC);
ASSERT(save_blk->magic == XFS_DIR2_LEAFN_MAGIC);
drop_leaf = drop_blk->bp->b_addr;
save_leaf = save_blk->bp->b_addr;
ASSERT(drop_leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
ASSERT(save_leaf->hdr.info.magic == cpu_to_be16(XFS_DIR2_LEAFN_MAGIC));
xfs_dir3_leaf_hdr_from_disk(&savehdr, save_leaf);
xfs_dir3_leaf_hdr_from_disk(&drophdr, drop_leaf);
sents = xfs_dir3_leaf_ents_p(save_leaf);
dents = xfs_dir3_leaf_ents_p(drop_leaf);
/*
* If there are any stale leaf entries, take this opportunity
* to purge them.
*/
if (drop_leaf->hdr.stale)
xfs_dir2_leaf_compact(args, drop_blk->bp);
if (save_leaf->hdr.stale)
xfs_dir2_leaf_compact(args, save_blk->bp);
if (drophdr.stale)
xfs_dir3_leaf_compact(args, &drophdr, drop_blk->bp);
if (savehdr.stale)
xfs_dir3_leaf_compact(args, &savehdr, save_blk->bp);
/*
* Move the entries from drop to the appropriate end of save.
*/
drop_blk->hashval = be32_to_cpu(drop_leaf->ents[be16_to_cpu(drop_leaf->hdr.count) - 1].hashval);
drop_blk->hashval = be32_to_cpu(dents[drophdr.count - 1].hashval);
if (xfs_dir2_leafn_order(save_blk->bp, drop_blk->bp))
xfs_dir2_leafn_moveents(args, drop_blk->bp, 0, save_blk->bp, 0,
be16_to_cpu(drop_leaf->hdr.count));
xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
save_blk->bp, &savehdr, sents, 0,
drophdr.count);
else
xfs_dir2_leafn_moveents(args, drop_blk->bp, 0, save_blk->bp,
be16_to_cpu(save_leaf->hdr.count), be16_to_cpu(drop_leaf->hdr.count));
save_blk->hashval = be32_to_cpu(save_leaf->ents[be16_to_cpu(save_leaf->hdr.count) - 1].hashval);
xfs_dir2_leafn_check(args->dp, save_blk->bp);
xfs_dir3_leafn_moveents(args, drop_blk->bp, &drophdr, dents, 0,
save_blk->bp, &savehdr, sents,
savehdr.count, drophdr.count);
save_blk->hashval = be32_to_cpu(sents[savehdr.count - 1].hashval);
/* log the changes made when moving the entries */
xfs_dir3_leaf_hdr_to_disk(save_leaf, &savehdr);
xfs_dir3_leaf_hdr_to_disk(drop_leaf, &drophdr);
xfs_dir3_leaf_log_header(args->trans, save_blk->bp);
xfs_dir3_leaf_log_header(args->trans, drop_blk->bp);
xfs_dir3_leaf_check(args->dp->i_mount, save_blk->bp);
xfs_dir3_leaf_check(args->dp->i_mount, drop_blk->bp);
}
/*
@ -2113,13 +2190,15 @@ xfs_dir2_node_replace(
* and locked it. But paranoia is good.
*/
if (rval == EEXIST) {
struct xfs_dir2_leaf_entry *ents;
/*
* Find the leaf entry.
*/
blk = &state->path.blk[state->path.active - 1];
ASSERT(blk->magic == XFS_DIR2_LEAFN_MAGIC);
leaf = blk->bp->b_addr;
lep = &leaf->ents[blk->index];
ents = xfs_dir3_leaf_ents_p(leaf);
lep = &ents[blk->index];
ASSERT(state->extravalid);
/*
* Point to the data entry.

32
fs/xfs/xfs_dir2_priv.h
Unescape View File

@ -77,24 +77,25 @@ 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 const struct xfs_buf_ops xfs_dir2_leafn_buf_ops;
extern const struct xfs_buf_ops xfs_dir3_leafn_buf_ops;
extern int xfs_dir2_leafn_read(struct xfs_trans *tp, struct xfs_inode *dp,
extern int xfs_dir3_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,
struct xfs_buf *dbp);
extern int xfs_dir2_leaf_addname(struct xfs_da_args *args);
extern void xfs_dir2_leaf_compact(struct xfs_da_args *args,
struct xfs_buf *bp);
extern void xfs_dir2_leaf_compact_x1(struct xfs_buf *bp, int *indexp,
extern void xfs_dir3_leaf_compact(struct xfs_da_args *args,
struct xfs_dir3_icleaf_hdr *leafhdr, struct xfs_buf *bp);
extern void xfs_dir3_leaf_compact_x1(struct xfs_dir3_icleaf_hdr *leafhdr,
struct xfs_dir2_leaf_entry *ents, int *indexp,
int *lowstalep, int *highstalep, int *lowlogp, int *highlogp);
extern int xfs_dir2_leaf_getdents(struct xfs_inode *dp, void *dirent,
size_t bufsize, xfs_off_t *offset, filldir_t filldir);
extern int xfs_dir2_leaf_init(struct xfs_da_args *args, xfs_dir2_db_t bno,
struct xfs_buf **bpp, int magic);
extern void xfs_dir2_leaf_log_ents(struct xfs_trans *tp, struct xfs_buf *bp,
extern int xfs_dir3_leaf_get_buf(struct xfs_da_args *args, xfs_dir2_db_t bno,
struct xfs_buf **bpp, __uint16_t magic);
extern void xfs_dir3_leaf_log_ents(struct xfs_trans *tp, struct xfs_buf *bp,
int first, int last);
extern void xfs_dir2_leaf_log_header(struct xfs_trans *tp,
extern void xfs_dir3_leaf_log_header(struct xfs_trans *tp,
struct xfs_buf *bp);
extern int xfs_dir2_leaf_lookup(struct xfs_da_args *args);
extern int xfs_dir2_leaf_removename(struct xfs_da_args *args);
@ -104,11 +105,18 @@ extern int xfs_dir2_leaf_search_hash(struct xfs_da_args *args,
extern int xfs_dir2_leaf_trim_data(struct xfs_da_args *args,
struct xfs_buf *lbp, xfs_dir2_db_t db);
extern struct xfs_dir2_leaf_entry *
xfs_dir2_leaf_find_entry(struct xfs_dir2_leaf *leaf, int index, int compact,
int lowstale, int highstale,
int *lfloglow, int *lfloghigh);
xfs_dir3_leaf_find_entry(struct xfs_dir3_icleaf_hdr *leafhdr,
struct xfs_dir2_leaf_entry *ents, int index, int compact,
int lowstale, int highstale, int *lfloglow, int *lfloghigh);
extern int xfs_dir2_node_to_leaf(struct xfs_da_state *state);
extern void xfs_dir3_leaf_hdr_from_disk(struct xfs_dir3_icleaf_hdr *to,
struct xfs_dir2_leaf *from);
extern void xfs_dir3_leaf_hdr_to_disk(struct xfs_dir2_leaf *to,
struct xfs_dir3_icleaf_hdr *from);
extern bool xfs_dir3_leaf_check_int(struct xfs_mount *mp,
struct xfs_dir3_icleaf_hdr *hdr, struct xfs_dir2_leaf *leaf);
/* xfs_dir2_node.c */
extern int xfs_dir2_leaf_to_node(struct xfs_da_args *args,
struct xfs_buf *lbp);

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