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Commit 08e2e5bc authored by Trond Myklebust's avatar Trond Myklebust
Browse files

pNFS/flexfiles: Clean up layoutstats 



Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 5b9b3c85

fs/nfs/flexfilelayout/flexfilelayout.c

+7 −20
Original line number Diff line number Diff line
@@ -2227,14 +2227,13 @@ ff_layout_encode_layoutstats(struct xdr_stream *xdr, 
}



static int

ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args,

			       struct pnfs_layout_hdr *lo,

ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,

			       struct nfs42_layoutstat_devinfo *devinfo,

			       int dev_limit)

{

	struct nfs4_flexfile_layout *ff_layout = FF_LAYOUT_FROM_HDR(lo);

	struct nfs4_ff_layout_mirror *mirror;

	struct nfs4_deviceid_node *dev;

	struct nfs42_layoutstat_devinfo *devinfo;

	int i = 0;



	list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {
@@ -2248,7 +2247,6 @@ ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, 
		if (!atomic_inc_not_zero(&mirror->ref))

			continue;

		dev = &mirror->mirror_ds->id_node; 

		devinfo = &args->devinfo[i];

		memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);

		devinfo->offset = 0;

		devinfo->length = NFS4_MAX_UINT64;
@@ -2260,6 +2258,7 @@ ff_layout_mirror_prepare_stats(struct nfs42_layoutstat_args *args, 
		devinfo->layoutstats_encode = ff_layout_encode_layoutstats;

		devinfo->layout_private = mirror;



		devinfo++;

		i++;

	}

	return i;
@@ -2269,29 +2268,17 @@ static int 
ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)

{

	struct nfs4_flexfile_layout *ff_layout;

	struct nfs4_ff_layout_mirror *mirror;

	int dev_count = 0;

	const int dev_count = PNFS_LAYOUTSTATS_MAXDEV;



	spin_lock(&args->inode->i_lock);

	ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);

	list_for_each_entry(mirror, &ff_layout->mirrors, mirrors) {

		if (atomic_read(&mirror->ref) != 0)

			dev_count ++;

	}

	spin_unlock(&args->inode->i_lock);

	/* For now, send at most PNFS_LAYOUTSTATS_MAXDEV statistics */

	if (dev_count > PNFS_LAYOUTSTATS_MAXDEV) {

		dprintk("%s: truncating devinfo to limit (%d:%d)\n",

			__func__, dev_count, PNFS_LAYOUTSTATS_MAXDEV);

		dev_count = PNFS_LAYOUTSTATS_MAXDEV;

	}

	args->devinfo = kmalloc_array(dev_count, sizeof(*args->devinfo), GFP_NOIO);

	if (!args->devinfo)

		return -ENOMEM;



	spin_lock(&args->inode->i_lock);

	args->num_dev = ff_layout_mirror_prepare_stats(args,

			&ff_layout->generic_hdr, dev_count);

	ff_layout = FF_LAYOUT_FROM_HDR(NFS_I(args->inode)->layout);

	args->num_dev = ff_layout_mirror_prepare_stats(&ff_layout->generic_hdr,

			&args->devinfo[0], dev_count);

	spin_unlock(&args->inode->i_lock);

	if (!args->num_dev) {

		kfree(args->devinfo);