pnfs: factor GETDEVICEINFO implementations
Add support to the common pNFS core to issue GETDEVICEINFO calls on
a device ID cache miss. The code is taken from the well debugged
file layout implementation and calls out to the layoutdriver through
a new alloc_deviceid_node method. The calling conventions for
nfs4_find_get_deviceid are changed so that all information needed to
send a GETDEVICEINFO request is passed to the common code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index 163cad1..abc5056 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -649,18 +649,15 @@
}
/* find and reference the deviceid */
- d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode)->pnfs_curr_ld,
- NFS_SERVER(lo->plh_inode)->nfs_client, id);
- if (d == NULL) {
- dsaddr = filelayout_get_device_info(lo->plh_inode, id,
- lo->plh_lc_cred, gfp_flags);
- if (dsaddr == NULL)
- goto out;
- } else
- dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node);
+ d = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode), id,
+ lo->plh_lc_cred, gfp_flags);
+ if (d == NULL)
+ goto out;
+
+ dsaddr = container_of(d, struct nfs4_file_layout_dsaddr, id_node);
/* Found deviceid is unavailable */
if (filelayout_test_devid_unavailable(&dsaddr->id_node))
- goto out_put;
+ goto out_put;
fl->dsaddr = dsaddr;
@@ -1371,6 +1368,17 @@
cinfo->ds->ncommitting = 0;
return PNFS_ATTEMPTED;
}
+static struct nfs4_deviceid_node *
+filelayout_alloc_deviceid_node(struct nfs_server *server,
+ struct pnfs_device *pdev, gfp_t gfp_flags)
+{
+ struct nfs4_file_layout_dsaddr *dsaddr;
+
+ dsaddr = nfs4_fl_alloc_deviceid_node(server, pdev, gfp_flags);
+ if (!dsaddr)
+ return NULL;
+ return &dsaddr->id_node;
+}
static void
filelayout_free_deveiceid_node(struct nfs4_deviceid_node *d)
@@ -1423,6 +1431,7 @@
.commit_pagelist = filelayout_commit_pagelist,
.read_pagelist = filelayout_read_pagelist,
.write_pagelist = filelayout_write_pagelist,
+ .alloc_deviceid_node = filelayout_alloc_deviceid_node,
.free_deviceid_node = filelayout_free_deveiceid_node,
};