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authorChristoph Hellwig <hch@lst.de>2014-09-03 04:27:58 (GMT)
committerTrond Myklebust <trond.myklebust@primarydata.com>2014-09-10 19:47:04 (GMT)
commit9dd2fcd32f488ea89c2227cc56069446147376e8 (patch)
tree30ea4e772c5c64cdf8120ad960b0910f622a92bf /fs/nfs
parent661373b13d0490ff410a2133d4a7a117f2dd037e (diff)
downloadlinux-9dd2fcd32f488ea89c2227cc56069446147376e8.tar.xz
pnfs: add a common GETDEVICELIST implementation
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@lst.de> Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs')
-rw-r--r--fs/nfs/pnfs.h2
-rw-r--r--fs/nfs/pnfs_dev.c29
2 files changed, 31 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index ce89ae3..3eeca49 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -277,6 +277,8 @@ 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);