pnfs: add pnfs_report_layoutstat helper function
Reviewed-by: Jeff Layton <jeff.layton@primarydata.com>
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index a053041..ee02483 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -198,6 +198,10 @@
nfs42_layoutstat_release(void *calldata)
{
struct nfs42_layoutstat_data *data = calldata;
+ struct nfs_server *nfss = NFS_SERVER(data->args.inode);
+
+ if (nfss->pnfs_curr_ld->cleanup_layoutstats)
+ nfss->pnfs_curr_ld->cleanup_layoutstats(data);
pnfs_put_layout_hdr(NFS_I(data->args.inode)->layout);
nfs_iput_and_deactive(data->inode);
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index d47c188..6279cff 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -35,6 +35,7 @@
#include "iostat.h"
#include "nfs4trace.h"
#include "delegation.h"
+#include "nfs42.h"
#define NFSDBG_FACILITY NFSDBG_PNFS
#define PNFS_LAYOUTGET_RETRY_TIMEOUT (120*HZ)
@@ -2250,3 +2251,51 @@
}
return thp;
}
+
+int
+pnfs_report_layoutstat(struct inode *inode)
+{
+ struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
+ struct nfs_server *server = NFS_SERVER(inode);
+ struct nfs42_layoutstat_data *data;
+ struct pnfs_layout_hdr *hdr;
+ int status = 0;
+
+ if (!pnfs_enabled_sb(server) || !ld->prepare_layoutstats)
+ goto out;
+
+ spin_lock(&inode->i_lock);
+ if (!NFS_I(inode)->layout) {
+ spin_unlock(&inode->i_lock);
+ goto out;
+ }
+ hdr = NFS_I(inode)->layout;
+ pnfs_get_layout_hdr(hdr);
+ spin_unlock(&inode->i_lock);
+
+ data = kzalloc(sizeof(*data), GFP_KERNEL);
+ if (!data) {
+ status = -ENOMEM;
+ goto out_put;
+ }
+
+ data->args.fh = NFS_FH(inode);
+ data->args.inode = inode;
+ nfs4_stateid_copy(&data->args.stateid, &hdr->plh_stateid);
+ status = ld->prepare_layoutstats(&data->args);
+ if (status)
+ goto out_free;
+
+ status = nfs42_proc_layoutstats_generic(NFS_SERVER(inode), data);
+
+out:
+ dprintk("%s returns %d\n", __func__, status);
+ return status;
+
+out_free:
+ kfree(data);
+out_put:
+ pnfs_put_layout_hdr(hdr);
+ goto out;
+}
+EXPORT_SYMBOL_GPL(pnfs_report_layoutstat);
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 1e6308f..0a47239 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -178,6 +178,8 @@
void (*encode_layoutcommit) (struct pnfs_layout_hdr *lo,
struct xdr_stream *xdr,
const struct nfs4_layoutcommit_args *args);
+ int (*prepare_layoutstats) (struct nfs42_layoutstat_args *args);
+ void (*cleanup_layoutstats) (struct nfs42_layoutstat_data *data);
};
struct pnfs_layout_hdr {
@@ -290,6 +292,7 @@
struct nfs4_threshold *pnfs_mdsthreshold_alloc(void);
void pnfs_error_mark_layout_for_return(struct inode *inode,
struct pnfs_layout_segment *lseg);
+int pnfs_report_layoutstat(struct inode *inode);
/* nfs4_deviceid_flags */
enum {