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NFSv4.1: Get rid of pNFS layout state "NFS_LAYOUT_INVALID"

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In all cases where we set NFS_LAYOUT_INVALID, we also set NFS_LAYOUT_DESTROYED.
Furthermore, in all cases where we test for NFS_LAYOUT_INVALID, we should
also be testing for NFS_LAYOUT_DESTROYED, since the latter means that
we hold no valid layout segments.
Ergo the two are redundant.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Trond Myklebust 2012-09-20 15:07:45 -04:00
parent 1f7977c136
commit 965938b83b
3 changed files with 7 additions and 10 deletions
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4
fs/nfs/nfs4filelayout.c
View file

@ -190,8 +190,6 @@ static int filelayout_async_handle_error(struct rpc_task *task,
* i/o and all i/o waiting on the slot table to the MDS until
* layout is destroyed and a new valid layout is obtained.
*/
set_bit(NFS_LAYOUT_INVALID,
&NFS_I(inode)->layout->plh_flags);
pnfs_destroy_layout(NFS_I(inode));
rpc_wake_up(&tbl->slot_tbl_waitq);
goto reset;
@ -281,7 +279,7 @@ filelayout_reset_to_mds(struct pnfs_layout_segment *lseg)
{
struct nfs4_deviceid_node *node = FILELAYOUT_DEVID_NODE(lseg);
return filelayout_test_layout_invalid(lseg->pls_layout) ||
return pnfs_test_layout_destroyed(lseg->pls_layout) ||
filelayout_test_devid_unavailable(node);
}

6
fs/nfs/nfs4filelayout.h
View file

@ -128,12 +128,6 @@ filelayout_mark_devid_invalid(struct nfs4_deviceid_node *node)
set_bit(NFS_DEVICEID_INVALID, &node->flags);
}
static inline bool
filelayout_test_layout_invalid(struct pnfs_layout_hdr *lo)
{
return test_bit(NFS_LAYOUT_INVALID, &lo->plh_flags);
}
static inline bool
filelayout_test_devid_invalid(struct nfs4_deviceid_node *node)
{

7
fs/nfs/pnfs.h
View file

@ -63,7 +63,6 @@ enum {
NFS_LAYOUT_BULK_RECALL, /* bulk recall affecting layout */
NFS_LAYOUT_ROC, /* some lseg had roc bit set */
NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */
NFS_LAYOUT_INVALID, /* layout is being destroyed */
NFS_LAYOUT_RETURNED, /* layout has already been returned */
};
@ -279,6 +278,12 @@ pnfs_test_layout_returned(struct pnfs_layout_hdr *lo)
return test_bit(NFS_LAYOUT_RETURNED, &lo->plh_flags);
}
static inline bool
pnfs_test_layout_destroyed(struct pnfs_layout_hdr *lo)
{
return test_bit(NFS_LAYOUT_DESTROYED, &lo->plh_flags);
}
static inline struct pnfs_layout_segment *
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
{