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Commit ce5624f7 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4: Return NFS4ERR_DELAY when a layout recall fails due to igrab() 



Signed-off-by: default avatarTrond Myklebust <trond.myklebust@hammerspace.com>
parent 6c342655

fs/nfs/callback_proc.c

+14 −12
Original line number Diff line number Diff line
@@ -128,7 +128,6 @@ static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp, 
	struct inode *inode;

	struct pnfs_layout_hdr *lo;



restart:

	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {

		list_for_each_entry(lo, &server->layouts, plh_layouts) {

			if (stateid != NULL &&
@@ -136,20 +135,20 @@ static struct inode *nfs_layout_find_inode_by_stateid(struct nfs_client *clp, 
				continue;

			inode = igrab(lo->plh_inode);

			if (!inode)

				continue;

				return ERR_PTR(-EAGAIN);

			if (!nfs_sb_active(inode->i_sb)) {

				rcu_read_unlock();

				spin_unlock(&clp->cl_lock);

				iput(inode);

				spin_lock(&clp->cl_lock);

				rcu_read_lock();

				goto restart;

				return ERR_PTR(-EAGAIN);

			}

			return inode;

		}

	}



	return NULL;

	return ERR_PTR(-ENOENT);

}



/*
@@ -166,7 +165,6 @@ static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp, 
	struct inode *inode;

	struct pnfs_layout_hdr *lo;



restart:

	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {

		list_for_each_entry(lo, &server->layouts, plh_layouts) {

			nfsi = NFS_I(lo->plh_inode);
@@ -176,20 +174,20 @@ static struct inode *nfs_layout_find_inode_by_fh(struct nfs_client *clp, 
				continue;

			inode = igrab(lo->plh_inode);

			if (!inode)

				continue;

				return ERR_PTR(-EAGAIN);

			if (!nfs_sb_active(inode->i_sb)) {

				rcu_read_unlock();

				spin_unlock(&clp->cl_lock);

				iput(inode);

				spin_lock(&clp->cl_lock);

				rcu_read_lock();

				goto restart;

				return ERR_PTR(-EAGAIN);

			}

			return inode;

		}

	}



	return NULL;

	return ERR_PTR(-ENOENT);

}



static struct inode *nfs_layout_find_inode(struct nfs_client *clp,
@@ -201,7 +199,7 @@ static struct inode *nfs_layout_find_inode(struct nfs_client *clp, 
	spin_lock(&clp->cl_lock);

	rcu_read_lock();

	inode = nfs_layout_find_inode_by_stateid(clp, stateid);

	if (!inode)

	if (inode == ERR_PTR(-ENOENT))

		inode = nfs_layout_find_inode_by_fh(clp, fh);

	rcu_read_unlock();

	spin_unlock(&clp->cl_lock);
@@ -256,8 +254,11 @@ static u32 initiate_file_draining(struct nfs_client *clp, 
	LIST_HEAD(free_me_list);



	ino = nfs_layout_find_inode(clp, &args->cbl_fh, &args->cbl_stateid);

	if (!ino)

		goto out;

	if (IS_ERR(ino)) {

		if (ino == ERR_PTR(-EAGAIN))

			rv = NFS4ERR_DELAY;

		goto out_noput;

	}



	pnfs_layoutcommit_inode(ino, false);
@@ -303,9 +304,10 @@ static u32 initiate_file_draining(struct nfs_client *clp, 
	nfs_commit_inode(ino, 0);

	pnfs_put_layout_hdr(lo);

out:

	nfs_iput_and_deactive(ino);

out_noput:

	trace_nfs4_cb_layoutrecall_file(clp, &args->cbl_fh, ino,

			&args->cbl_stateid, -rv);

	nfs_iput_and_deactive(ino);

	return rv;

}