diff options
Diffstat (limited to 'fs/xfs/xfs_reflink.c')
| -rw-r--r-- | fs/xfs/xfs_reflink.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c index e92ccd316391..685c419ae011 100644 --- a/fs/xfs/xfs_reflink.c +++ b/fs/xfs/xfs_reflink.c @@ -304,6 +304,9 @@ retry: goto out_unlock; } + if (end_fsb != orig_end_fsb) + xfs_inode_set_cowblocks_tag(ip); + trace_xfs_reflink_cow_alloc(ip, &got); done: *offset_fsb = end_fsb; @@ -1562,6 +1565,7 @@ next: /* Clear the inode flag. */ trace_xfs_reflink_unset_inode_flag(ip); ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK; + xfs_inode_clear_cowblocks_tag(ip); xfs_trans_ijoin(*tpp, ip, 0); xfs_trans_log_inode(*tpp, ip, XFS_ILOG_CORE); @@ -1662,3 +1666,37 @@ out: trace_xfs_reflink_unshare_error(ip, error, _RET_IP_); return error; } + +/* + * Does this inode have any real CoW reservations? + */ +bool +xfs_reflink_has_real_cow_blocks( + struct xfs_inode *ip) +{ + struct xfs_bmbt_irec irec; + struct xfs_ifork *ifp; + struct xfs_bmbt_rec_host *gotp; + xfs_extnum_t idx; + + if (!xfs_is_reflink_inode(ip)) + return false; + + /* Go find the old extent in the CoW fork. */ + ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK); + gotp = xfs_iext_bno_to_ext(ifp, 0, &idx); + while (gotp) { + xfs_bmbt_get_all(gotp, &irec); + + if (!isnullstartblock(irec.br_startblock)) + return true; + + /* Roll on... */ + idx++; + if (idx >= ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) + break; + gotp = xfs_iext_get_ext(ifp, idx); + } + + return false; +} |