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ocfs2: Convenient access to xattr bucket data blocks.

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The xattr code often wants to access the data pointer for blocks in an
xattr bucket.  This is usually found by dereferencing the bh array
hanging off of the ocfs2_xattr_bucket structure.  Rather than do this
all the time, let's provide a nice little macro.  The idea is ripped
from the ocfs2_path code.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Joel Becker 2008-10-24 16:57:21 -07:00 committed by Mark Fasheh
parent 9c7759aa67
commit 51def39f0c
1 changed files with 8 additions and 7 deletions
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15
fs/ocfs2/xattr.c
View file

@ -155,6 +155,7 @@ static inline u16 ocfs2_xattr_max_xe_in_bucket(struct super_block *sb)
}
#define bucket_blkno(_b) ((_b)->bu_bhs[0]->b_blocknr)
#define bucket_block(_b, _n) ((_b)->bu_bhs[(_n)]->b_data)
static inline const char *ocfs2_xattr_prefix(int name_index)
{
@ -801,7 +802,7 @@ static int ocfs2_xattr_block_get(struct inode *inode,
i,
&block_off,
&name_offset);
xs->base = xs->bucket.bu_bhs[block_off]->b_data;
xs->base = bucket_block(&xs->bucket, block_off);
}
if (ocfs2_xattr_is_local(xs->here)) {
memcpy(buffer, (void *)xs->base +
@ -2280,11 +2281,11 @@ static int ocfs2_xattr_bucket_find(struct inode *inode,
}
xs->bucket.bu_bhs[0] = lower_bh;
xs->bucket.bu_xh = (struct ocfs2_xattr_header *)
xs->bucket.bu_bhs[0]->b_data;
bucket_block(&xs->bucket, 0);
lower_bh = NULL;
xs->header = xs->bucket.bu_xh;
xs->base = xs->bucket.bu_bhs[0]->b_data;
xs->base = bucket_block(&xs->bucket, 0);
xs->end = xs->base + inode->i_sb->s_blocksize;
if (found) {
@ -2378,7 +2379,7 @@ static int ocfs2_iterate_xattr_buckets(struct inode *inode,
goto out;
}
bucket.bu_xh = (struct ocfs2_xattr_header *)bucket.bu_bhs[0]->b_data;
bucket.bu_xh = (struct ocfs2_xattr_header *)bucket_block(&bucket, 0);
/*
* The real bucket num in this series of blocks is stored
* in the 1st bucket.
@ -2457,7 +2458,7 @@ static int ocfs2_list_xattr_bucket(struct inode *inode,
if (ret)
break;
name = (const char *)bucket->bu_bhs[block_off]->b_data +
name = (const char *)bucket_block(bucket, block_off) +
new_offset;
ret = ocfs2_xattr_list_entry(xl->buffer,
xl->buffer_size,
@ -2630,7 +2631,7 @@ static int ocfs2_xattr_update_xattr_search(struct inode *inode,
xs->bucket.bu_bhs[0] = new_bh;
get_bh(new_bh);
xs->bucket.bu_xh = (struct ocfs2_xattr_header *)xs->bucket.bu_bhs[0]->b_data;
xs->bucket.bu_xh = (struct ocfs2_xattr_header *)bucket_block(&xs->bucket, 0);
xs->header = xs->bucket.bu_xh;
xs->base = new_bh->b_data;
@ -3931,7 +3932,7 @@ static inline char *ocfs2_xattr_bucket_get_val(struct inode *inode,
int block_off = offs >> inode->i_sb->s_blocksize_bits;
offs = offs % inode->i_sb->s_blocksize;
return bucket->bu_bhs[block_off]->b_data + offs;
return bucket_block(bucket, block_off) + offs;
}
/*