At a simple helper to issue a GETDEVICELIST operation and pre-load
the device id cache based on the result.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
fs/nfs/pnfs.h | 2 ++
fs/nfs/pnfs_dev.c | 29 +++++++++++++++++++++++++++++
2 files changed, 31 insertions(+)
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index c5f90e7..bf4e87d 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -276,6 +276,8 @@ bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
void nfs4_deviceid_purge_client(const struct nfs_client *);
+int nfs4_deviceid_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh);
static inline struct pnfs_layout_segment *
pnfs_get_lseg(struct pnfs_layout_segment *lseg)
diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c
index 791f8b3..82c2836 100644
--- a/fs/nfs/pnfs_dev.c
+++ b/fs/nfs/pnfs_dev.c
@@ -359,3 +359,32 @@ nfs4_deviceid_mark_client_invalid(struct nfs_client *clp)
rcu_read_unlock();
}
+int
+nfs4_deviceid_getdevicelist(struct nfs_server *server,
+ const struct nfs_fh *fh)
+{
+ struct pnfs_devicelist *dlist;
+ struct nfs4_deviceid_node *d;
+ int error = 0, i;
+
+ dlist = kzalloc(sizeof(struct pnfs_devicelist), GFP_NOFS);
+ if (!dlist)
+ return -ENOMEM;
+
+ while (!dlist->eof) {
+ error = nfs4_proc_getdevicelist(server, fh, dlist);
+ if (error)
+ break;
+
+ for (i = 0; i < dlist->num_devs; i++) {
+ d = nfs4_find_get_deviceid(server, &dlist->dev_id[i],
+ NULL, GFP_NOFS);
+ if (d)
+ nfs4_put_deviceid_node(d);
+ }
+ }
+
+ kfree(dlist);
+ return error;
+}
+EXPORT_SYMBOL_GPL(nfs4_deviceid_getdevicelist);
--
1.9.1
--
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