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ocfs2: Abstract the creation of xattr block.

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In xattr reflink, we also need to create xattr block, so
abstract the process out.

Signed-off-by: Tao Ma <tao.ma@oracle.com>
This commit is contained in:
Tao Ma 2009-08-18 11:43:24 +08:00 committed by Joel Becker
parent fd68a894fc
commit 5aea1f0ef4
1 changed files with 70 additions and 45 deletions
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115
fs/ocfs2/xattr.c
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@ -2105,6 +2105,72 @@ cleanup:
return ret;
}
static int ocfs2_create_xattr_block(handle_t *handle,
struct inode *inode,
struct buffer_head *inode_bh,
struct ocfs2_alloc_context *meta_ac,
struct buffer_head **ret_bh)
{
int ret;
u16 suballoc_bit_start;
u32 num_got;
u64 first_blkno;
struct ocfs2_dinode *di = (struct ocfs2_dinode *)inode_bh->b_data;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct buffer_head *new_bh = NULL;
struct ocfs2_xattr_block *xblk;
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), inode_bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
ret = ocfs2_claim_metadata(osb, handle, meta_ac, 1,
&suballoc_bit_start, &num_got,
&first_blkno);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
new_bh = sb_getblk(inode->i_sb, first_blkno);
ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode),
new_bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
/* Initialize ocfs2_xattr_block */
xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
memset(xblk, 0, inode->i_sb->s_blocksize);
strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
xblk->xb_blkno = cpu_to_le64(first_blkno);
ret = ocfs2_journal_dirty(handle, new_bh);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
di->i_xattr_loc = cpu_to_le64(first_blkno);
ocfs2_journal_dirty(handle, inode_bh);
*ret_bh = new_bh;
new_bh = NULL;
end:
brelse(new_bh);
return ret;
}
/*
* ocfs2_xattr_block_set()
*
@ -2117,65 +2183,24 @@ static int ocfs2_xattr_block_set(struct inode *inode,
struct ocfs2_xattr_set_ctxt *ctxt)
{
struct buffer_head *new_bh = NULL;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
struct ocfs2_dinode *di = (struct ocfs2_dinode *)xs->inode_bh->b_data;
handle_t *handle = ctxt->handle;
struct ocfs2_xattr_block *xblk = NULL;
u16 suballoc_bit_start;
u32 num_got;
u64 first_blkno;
int ret;
if (!xs->xattr_bh) {
ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
xs->inode_bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (ret < 0) {
ret = ocfs2_create_xattr_block(handle, inode, xs->inode_bh,
ctxt->meta_ac, &new_bh);
if (ret) {
mlog_errno(ret);
goto end;
}
ret = ocfs2_claim_metadata(osb, handle, ctxt->meta_ac, 1,
&suballoc_bit_start, &num_got,
&first_blkno);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
new_bh = sb_getblk(inode->i_sb, first_blkno);
ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), new_bh);
ret = ocfs2_journal_access_xb(handle, INODE_CACHE(inode),
new_bh,
OCFS2_JOURNAL_ACCESS_CREATE);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
/* Initialize ocfs2_xattr_block */
xs->xattr_bh = new_bh;
xblk = (struct ocfs2_xattr_block *)new_bh->b_data;
memset(xblk, 0, inode->i_sb->s_blocksize);
strcpy((void *)xblk, OCFS2_XATTR_BLOCK_SIGNATURE);
xblk->xb_suballoc_slot = cpu_to_le16(osb->slot_num);
xblk->xb_suballoc_bit = cpu_to_le16(suballoc_bit_start);
xblk->xb_fs_generation = cpu_to_le32(osb->fs_generation);
xblk->xb_blkno = cpu_to_le64(first_blkno);
xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;
xs->header = &xblk->xb_attrs.xb_header;
xs->base = (void *)xs->header;
xs->end = (void *)xblk + inode->i_sb->s_blocksize;
xs->here = xs->header->xh_entries;
ret = ocfs2_journal_dirty(handle, new_bh);
if (ret < 0) {
mlog_errno(ret);
goto end;
}
di->i_xattr_loc = cpu_to_le64(first_blkno);
ocfs2_journal_dirty(handle, xs->inode_bh);
} else
xblk = (struct ocfs2_xattr_block *)xs->xattr_bh->b_data;