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authorTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-17 17:12:15 -0400
committerTrond Myklebust <Trond.Myklebust@netapp.com>2012-09-28 16:03:06 -0400
commita0b0a6e39bd1bb4a0922086feee73627cbd53ba4 (patch)
tree51921888aee9b74c3d6ad62b3546c858434f8925 /fs/nfs/pnfs.c
parentd19751e7b9bd8a01d00372325439589886674f79 (diff)
downloadop-kernel-dev-a0b0a6e39bd1bb4a0922086feee73627cbd53ba4.zip
op-kernel-dev-a0b0a6e39bd1bb4a0922086feee73627cbd53ba4.tar.gz
NFS: Clean up the pNFS layoutget interface
Ensure that we do return errors from nfs4_proc_layoutget() and that we don't mark the layout as having failed if the error was due to a signal or resource problem on the client side. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'fs/nfs/pnfs.c')
-rw-r--r--fs/nfs/pnfs.c25
1 files changed, 16 insertions, 9 deletions
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 2e00fea..3a7ac97 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -582,7 +582,7 @@ send_layoutget(struct pnfs_layout_hdr *lo,
struct inode *ino = lo->plh_inode;
struct nfs_server *server = NFS_SERVER(ino);
struct nfs4_layoutget *lgp;
- struct pnfs_layout_segment *lseg = NULL;
+ struct pnfs_layout_segment *lseg;
dprintk("--> %s\n", __func__);
@@ -599,16 +599,22 @@ send_layoutget(struct pnfs_layout_hdr *lo,
lgp->args.type = server->pnfs_curr_ld->id;
lgp->args.inode = ino;
lgp->args.ctx = get_nfs_open_context(ctx);
- lgp->lsegpp = &lseg;
lgp->gfp_flags = gfp_flags;
/* Synchronously retrieve layout information from server and
* store in lseg.
*/
- nfs4_proc_layoutget(lgp, gfp_flags);
- if (!lseg) {
- /* remember that LAYOUTGET failed and suspend trying */
- set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
+ lseg = nfs4_proc_layoutget(lgp, gfp_flags);
+ if (IS_ERR(lseg)) {
+ switch (PTR_ERR(lseg)) {
+ case -ENOMEM:
+ case -ERESTARTSYS:
+ break;
+ default:
+ /* remember that LAYOUTGET failed and suspend trying */
+ set_bit(lo_fail_bit(range->iomode), &lo->plh_flags);
+ }
+ return NULL;
}
return lseg;
@@ -1096,7 +1102,7 @@ out_unlock:
}
EXPORT_SYMBOL_GPL(pnfs_update_layout);
-int
+struct pnfs_layout_segment *
pnfs_layout_process(struct nfs4_layoutget *lgp)
{
struct pnfs_layout_hdr *lo = NFS_I(lgp->args.inode)->layout;
@@ -1129,7 +1135,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
}
init_lseg(lo, lseg);
lseg->pls_range = res->range;
- *lgp->lsegpp = get_lseg(lseg);
+ get_lseg(lseg);
pnfs_insert_layout(lo, lseg);
if (res->return_on_close) {
@@ -1140,8 +1146,9 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
/* Done processing layoutget. Set the layout stateid */
pnfs_set_layout_stateid(lo, &res->stateid, false);
spin_unlock(&ino->i_lock);
+ return lseg;
out:
- return status;
+ return ERR_PTR(status);
out_forget_reply:
spin_unlock(&ino->i_lock);
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