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Commit 8733408d authored by Peng Tao's avatar Peng Tao Committed by Trond Myklebust
Browse files

pnfs: add pnfs_report_layoutstat helper function 



Reviewed-by: default avatarJeff Layton <jeff.layton@primarydata.com>
Signed-off-by: default avatarPeng Tao <tao.peng@primarydata.com>
Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 1b4a4bd8

fs/nfs/nfs42proc.c

+4 −0
Original line number Diff line number Diff line
@@ -198,6 +198,10 @@ static void 
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);

fs/nfs/pnfs.c

+49 −0
Original line number Diff line number Diff line
@@ -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 @@ struct nfs4_threshold *pnfs_mdsthreshold_alloc(void) 
	}

	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);

fs/nfs/pnfs.h

+3 −0
Original line number Diff line number Diff line
@@ -178,6 +178,8 @@ struct pnfs_layoutdriver_type { 
	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 @@ int pnfs_write_done_resend_to_mds(struct nfs_pgio_header *); 
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 {