diff options
| -rw-r--r-- | fs/xfs/xfs_fsmap.c | 72 |
1 files changed, 69 insertions, 3 deletions
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c index 24b3e53379bf..edd75c67919a 100644 --- a/fs/xfs/xfs_fsmap.c +++ b/fs/xfs/xfs_fsmap.c @@ -40,6 +40,7 @@ #include "xfs_fsmap.h" #include "xfs_refcount.h" #include "xfs_refcount_btree.h" +#include "xfs_alloc_btree.h" /* Convert an xfs_fsmap to an fsmap. */ void @@ -158,6 +159,9 @@ xfs_fsmap_owner_from_rmap( case XFS_RMAP_OWN_COW: dest->fmr_owner = XFS_FMR_OWN_COW; break; + case XFS_RMAP_OWN_NULL: /* "free" */ + dest->fmr_owner = XFS_FMR_OWN_FREE; + break; default: return -EFSCORRUPTED; } @@ -362,6 +366,30 @@ xfs_getfsmap_datadev_helper( return xfs_getfsmap_helper(cur->bc_tp, info, rec, rec_daddr); } +/* Transform a bnobt irec into a fsmap */ +STATIC int +xfs_getfsmap_datadev_bnobt_helper( + struct xfs_btree_cur *cur, + struct xfs_alloc_rec_incore *rec, + void *priv) +{ + struct xfs_mount *mp = cur->bc_mp; + struct xfs_getfsmap_info *info = priv; + struct xfs_rmap_irec irec; + xfs_daddr_t rec_daddr; + + rec_daddr = XFS_AGB_TO_DADDR(mp, cur->bc_private.a.agno, + rec->ar_startblock); + + irec.rm_startblock = rec->ar_startblock; + irec.rm_blockcount = rec->ar_blockcount; + irec.rm_owner = XFS_RMAP_OWN_NULL; /* "free" */ + irec.rm_offset = 0; + irec.rm_flags = 0; + + return xfs_getfsmap_helper(cur->bc_tp, info, &irec, rec_daddr); +} + /* Set rmap flags based on the getfsmap flags */ static void xfs_getfsmap_set_irec_flags( @@ -572,6 +600,43 @@ xfs_getfsmap_datadev_rmapbt( xfs_getfsmap_datadev_rmapbt_query, NULL); } +/* Actually query the bno btree. */ +STATIC int +xfs_getfsmap_datadev_bnobt_query( + struct xfs_trans *tp, + struct xfs_getfsmap_info *info, + struct xfs_btree_cur **curpp, + void *priv) +{ + struct xfs_alloc_rec_incore *key = priv; + + /* Report any gap at the end of the last AG. */ + if (info->last) + return xfs_getfsmap_datadev_bnobt_helper(*curpp, &key[1], info); + + /* Allocate cursor for this AG and query_range it. */ + *curpp = xfs_allocbt_init_cursor(tp->t_mountp, tp, info->agf_bp, + info->agno, XFS_BTNUM_BNO); + key->ar_startblock = info->low.rm_startblock; + key[1].ar_startblock = info->high.rm_startblock; + return xfs_alloc_query_range(*curpp, key, &key[1], + xfs_getfsmap_datadev_bnobt_helper, info); +} + +/* Execute a getfsmap query against the regular data device's bnobt. */ +STATIC int +xfs_getfsmap_datadev_bnobt( + struct xfs_trans *tp, + struct xfs_fsmap *keys, + struct xfs_getfsmap_info *info) +{ + struct xfs_alloc_rec_incore akeys[2]; + + info->missing_owner = XFS_FMR_OWN_UNKNOWN; + return __xfs_getfsmap_datadev(tp, keys, info, + xfs_getfsmap_datadev_bnobt_query, &akeys[0]); +} + /* Do we recognize the device? */ STATIC bool xfs_getfsmap_is_valid_device( @@ -652,8 +717,6 @@ xfs_getfsmap( int i; int error = 0; - if (!xfs_sb_version_hasrmapbt(&mp->m_sb)) - return -EOPNOTSUPP; if (head->fmh_iflags & ~FMH_IF_VALID) return -EINVAL; if (!xfs_getfsmap_is_valid_device(mp, &head->fmh_keys[0]) || @@ -665,7 +728,10 @@ xfs_getfsmap( /* Set up our device handlers. */ memset(handlers, 0, sizeof(handlers)); handlers[0].dev = new_encode_dev(mp->m_ddev_targp->bt_dev); - handlers[0].fn = xfs_getfsmap_datadev_rmapbt; + if (xfs_sb_version_hasrmapbt(&mp->m_sb)) + handlers[0].fn = xfs_getfsmap_datadev_rmapbt; + else + handlers[0].fn = xfs_getfsmap_datadev_bnobt; if (mp->m_logdev_targp != mp->m_ddev_targp) { handlers[1].dev = new_encode_dev(mp->m_logdev_targp->bt_dev); handlers[1].fn = xfs_getfsmap_logdev; |