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-rw-r--r--fs/xfs/xfs_dir2_block.c12
-rw-r--r--fs/xfs/xfs_dir2_block.h44
-rw-r--r--fs/xfs/xfs_dir2_sf.c14
3 files changed, 34 insertions, 36 deletions
diff --git a/fs/xfs/xfs_dir2_block.c b/fs/xfs/xfs_dir2_block.c
index a0037cc4dd8..9adaf803957 100644
--- a/fs/xfs/xfs_dir2_block.c
+++ b/fs/xfs/xfs_dir2_block.c
@@ -437,7 +437,6 @@ xfs_dir2_block_getdents(
xfs_off_t *offset,
filldir_t filldir)
{
- xfs_dir2_block_t *block; /* directory block structure */
xfs_dir2_data_hdr_t *hdr; /* block header */
xfs_dabuf_t *bp; /* buffer for block */
xfs_dir2_block_tail_t *btp; /* block tail */
@@ -471,14 +470,13 @@ xfs_dir2_block_getdents(
* We'll skip entries before this.
*/
wantoff = xfs_dir2_dataptr_to_off(mp, *offset);
- block = bp->data;
- hdr = &block->hdr;
+ hdr = bp->data;
xfs_dir2_data_check(dp, bp);
/*
* Set up values for the loop.
*/
btp = xfs_dir2_block_tail_p(mp, hdr);
- ptr = (char *)block->u;
+ ptr = (char *)(hdr + 1);
endptr = (char *)xfs_dir2_block_leaf_p(btp);
/*
@@ -1020,7 +1018,6 @@ xfs_dir2_sf_to_block(
xfs_da_args_t *args) /* operation arguments */
{
xfs_dir2_db_t blkno; /* dir-relative block # (0) */
- xfs_dir2_block_t *block; /* block structure */
xfs_dir2_data_hdr_t *hdr; /* block header */
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
xfs_dabuf_t *bp; /* block buffer */
@@ -1091,8 +1088,7 @@ xfs_dir2_sf_to_block(
kmem_free(sfp);
return error;
}
- block = bp->data;
- hdr = &block->hdr;
+ hdr = bp->data;
hdr->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
/*
* Compute size of block "tail" area.
@@ -1103,7 +1099,7 @@ xfs_dir2_sf_to_block(
* The whole thing is initialized to free by the init routine.
* Say we're using the leaf and tail area.
*/
- dup = (xfs_dir2_data_unused_t *)block->u;
+ dup = (xfs_dir2_data_unused_t *)(hdr + 1);
needlog = needscan = 0;
xfs_dir2_data_use_free(tp, bp, dup, mp->m_dirblksize - i, i, &needlog,
&needscan);
diff --git a/fs/xfs/xfs_dir2_block.h b/fs/xfs/xfs_dir2_block.h
index fe91f88f880..de59677e38b 100644
--- a/fs/xfs/xfs_dir2_block.h
+++ b/fs/xfs/xfs_dir2_block.h
@@ -19,10 +19,30 @@
#define __XFS_DIR2_BLOCK_H__
/*
- * xfs_dir2_block.h
- * Directory version 2, single block format structures
+ * Directory version 2, single block format structures.
+ *
+ * The single block format looks like the following drawing on disk:
+ *
+ * +-------------------------------------------------+
+ * | xfs_dir2_data_hdr_t |
+ * +-------------------------------------------------+
+ * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t |
+ * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t |
+ * | xfs_dir2_data_entry_t OR xfs_dir2_data_unused_t |
+ * | ... |
+ * +-------------------------------------------------+
+ * | unused space |
+ * +-------------------------------------------------+
+ * | ... |
+ * | xfs_dir2_leaf_entry_t |
+ * | xfs_dir2_leaf_entry_t |
+ * +-------------------------------------------------+
+ * | xfs_dir2_block_tail_t |
+ * +-------------------------------------------------+
+ *
+ * As all the entries are variable size structures the accessors in this
+ * file and xfs_dir2_data.h should be used to iterate over them.
*/
-
struct uio;
struct xfs_dabuf;
struct xfs_da_args;
@@ -32,14 +52,6 @@ struct xfs_inode;
struct xfs_mount;
struct xfs_trans;
-/*
- * The single block format is as follows:
- * xfs_dir2_data_hdr_t structure
- * xfs_dir2_data_entry_t and xfs_dir2_data_unused_t structures
- * xfs_dir2_leaf_entry_t structures
- * xfs_dir2_block_tail_t structure
- */
-
#define XFS_DIR2_BLOCK_MAGIC 0x58443242 /* XD2B: for one block dirs */
typedef struct xfs_dir2_block_tail {
@@ -48,16 +60,6 @@ typedef struct xfs_dir2_block_tail {
} xfs_dir2_block_tail_t;
/*
- * Generic single-block structure, for xfs_db.
- */
-typedef struct xfs_dir2_block {
- xfs_dir2_data_hdr_t hdr; /* magic XFS_DIR2_BLOCK_MAGIC */
- xfs_dir2_data_union_t u[1];
- xfs_dir2_leaf_entry_t leaf[1];
- xfs_dir2_block_tail_t tail;
-} xfs_dir2_block_t;
-
-/*
* Pointer to the leaf header embedded in a data block (1-block format)
*/
static inline xfs_dir2_block_tail_t *
diff --git a/fs/xfs/xfs_dir2_sf.c b/fs/xfs/xfs_dir2_sf.c
index 515efa5d29c..b47a99c8f24 100644
--- a/fs/xfs/xfs_dir2_sf.c
+++ b/fs/xfs/xfs_dir2_sf.c
@@ -226,7 +226,7 @@ xfs_dir2_block_to_sf(
int size, /* shortform directory size */
xfs_dir2_sf_hdr_t *sfhp) /* shortform directory hdr */
{
- xfs_dir2_block_t *block; /* block structure */
+ xfs_dir2_data_hdr_t *hdr; /* block header */
xfs_dir2_block_tail_t *btp; /* block tail pointer */
xfs_dir2_data_entry_t *dep; /* data entry pointer */
xfs_inode_t *dp; /* incore directory inode */
@@ -248,8 +248,8 @@ xfs_dir2_block_to_sf(
* Make a copy of the block data, so we can shrink the inode
* and add local data.
*/
- block = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
- memcpy(block, bp->data, mp->m_dirblksize);
+ hdr = kmem_alloc(mp->m_dirblksize, KM_SLEEP);
+ memcpy(hdr, bp->data, mp->m_dirblksize);
logflags = XFS_ILOG_CORE;
if ((error = xfs_dir2_shrink_inode(args, mp->m_dirdatablk, bp))) {
ASSERT(error != ENOSPC);
@@ -277,8 +277,8 @@ xfs_dir2_block_to_sf(
/*
* Set up to loop over the block's entries.
*/
- btp = xfs_dir2_block_tail_p(mp, &block->hdr);
- ptr = (char *)block->u;
+ btp = xfs_dir2_block_tail_p(mp, hdr);
+ ptr = (char *)(hdr + 1);
endptr = (char *)xfs_dir2_block_leaf_p(btp);
sfep = xfs_dir2_sf_firstentry(sfp);
/*
@@ -314,7 +314,7 @@ xfs_dir2_block_to_sf(
sfep->namelen = dep->namelen;
xfs_dir2_sf_put_offset(sfep,
(xfs_dir2_data_aoff_t)
- ((char *)dep - (char *)block));
+ ((char *)dep - (char *)hdr));
memcpy(sfep->name, dep->name, dep->namelen);
xfs_dir2_sfe_put_ino(sfp, sfep,
be64_to_cpu(dep->inumber));
@@ -327,7 +327,7 @@ xfs_dir2_block_to_sf(
xfs_dir2_sf_check(args);
out:
xfs_trans_log_inode(args->trans, dp, logflags);
- kmem_free(block);
+ kmem_free(hdr);
return error;
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-07 19:44:45 +0000