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ocfs2: Remove xattrs via ocfs2_xa_loc
Add ocfs2_xa_remove_entry(), which will remove an xattr entry from its storage via the ocfs2_xa_loc descriptor. Signed-off-by: Joel Becker <joel.becker@oracle.com>
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@ -1573,7 +1573,29 @@ static const struct ocfs2_xa_loc_operations ocfs2_xa_bucket_loc_ops = {
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static void ocfs2_xa_remove_entry(struct ocfs2_xa_loc *loc)
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{
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int index, count;
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struct ocfs2_xattr_header *xh = loc->xl_header;
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struct ocfs2_xattr_entry *entry = loc->xl_entry;
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ocfs2_xa_wipe_namevalue(loc);
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loc->xl_entry = NULL;
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le16_add_cpu(&xh->xh_count, -1);
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count = le16_to_cpu(xh->xh_count);
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/*
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* Only zero out the entry if there are more remaining. This is
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* important for an empty bucket, as it keeps track of the
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* bucket's hash value. It doesn't hurt empty block storage.
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*/
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if (count) {
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index = ((char *)entry - (char *)&xh->xh_entries) /
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sizeof(struct ocfs2_xattr_entry);
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memmove(&xh->xh_entries[index], &xh->xh_entries[index + 1],
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(count - index) * sizeof(struct ocfs2_xattr_entry));
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memset(&xh->xh_entries[count], 0,
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sizeof(struct ocfs2_xattr_entry));
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}
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}
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static void ocfs2_init_dinode_xa_loc(struct ocfs2_xa_loc *loc,
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@ -1638,7 +1660,6 @@ static void ocfs2_xattr_set_entry_local(struct inode *inode,
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size_t min_offs)
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{
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size_t name_len = strlen(xi->name);
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int i;
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struct ocfs2_xa_loc loc;
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if (xs->xattr_bh == xs->inode_bh)
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@ -1686,25 +1707,12 @@ static void ocfs2_xattr_set_entry_local(struct inode *inode,
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return;
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}
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/* Remove the old name+value. */
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ocfs2_xa_wipe_namevalue(&loc);
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xs->here->xe_name_hash = 0;
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xs->here->xe_name_offset = 0;
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ocfs2_xattr_set_local(xs->here, 1);
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xs->here->xe_value_size = 0;
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if (!xi->value)
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ocfs2_xa_remove_entry(&loc);
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else
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ocfs2_xa_wipe_namevalue(&loc);
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min_offs += size;
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if (!xi->value) {
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/* Remove the old entry. */
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i = le16_to_cpu(xs->header->xh_count) - 1;
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last = &xs->header->xh_entries[i];
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xs->header->xh_count = cpu_to_le16(i);
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memmove(xs->here, xs->here + 1,
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(void *)last - (void *)xs->here);
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memset(last, 0, sizeof(struct ocfs2_xattr_entry));
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}
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}
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if (xi->value) {
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/* Insert the new name+value. */
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@ -5001,8 +5009,8 @@ static void ocfs2_xattr_set_entry_normal(struct inode *inode,
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new_size = OCFS2_XATTR_SIZE(name_len) +
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OCFS2_XATTR_SIZE(xi->value_len);
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ocfs2_xa_wipe_namevalue(&loc);
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if (xi->value) {
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ocfs2_xa_wipe_namevalue(&loc);
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if (new_size > size)
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goto set_new_name_value;
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@ -5024,20 +5032,8 @@ static void ocfs2_xattr_set_entry_normal(struct inode *inode,
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ocfs2_xattr_set_local(xe, local);
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return;
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} else {
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/*
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* Remove the old entry if there is more than one.
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* We don't remove the last entry so that we can
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* use it to indicate the hash value of the empty
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* bucket.
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*/
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last -= 1;
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le16_add_cpu(&xh->xh_count, -1);
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if (xh->xh_count) {
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memmove(xe, xe + 1,
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(void *)last - (void *)xe);
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memset(last, 0,
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sizeof(struct ocfs2_xattr_entry));
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} else
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ocfs2_xa_remove_entry(&loc);
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if (!xh->xh_count)
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xh->xh_free_start =
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cpu_to_le16(OCFS2_XATTR_BUCKET_SIZE);
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