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Commit b20135d0 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFSv4.1/pNFS: Don't queue up a new commit if the layout segment is invalid 



If the layout segment is invalid, then we should not be adding more
write requests to the commit list. Instead, those writes should be
replayed after requesting a new layout.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent af7cf057

fs/nfs/callback_proc.c

+2 −0
Original line number Diff line number Diff line
@@ -233,6 +233,8 @@ static u32 initiate_file_draining(struct nfs_client *clp, 
unlock:

	spin_unlock(&ino->i_lock);

	pnfs_free_lseg_list(&free_me_list);

	/* Free all lsegs that are attached to commit buckets */

	nfs_commit_inode(ino, 0);

	pnfs_put_layout_hdr(lo);

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

			&args->cbl_stateid, -rv);

fs/nfs/direct.c

+12 −0
Original line number Diff line number Diff line
@@ -721,8 +721,20 @@ static void nfs_direct_commit_complete(struct nfs_commit_data *data) 
		nfs_direct_write_complete(dreq, data->inode);

}



static void nfs_direct_resched_write(struct nfs_commit_info *cinfo,

		struct nfs_page *req)

{

	struct nfs_direct_req *dreq = cinfo->dreq;



	spin_lock(&dreq->lock);

	dreq->flags = NFS_ODIRECT_RESCHED_WRITES;

	spin_unlock(&dreq->lock);

	nfs_mark_request_commit(req, NULL, cinfo, 0);

}



static const struct nfs_commit_completion_ops nfs_direct_commit_completion_ops = {

	.completion = nfs_direct_commit_complete,

	.resched_write = nfs_direct_resched_write,

};



static void nfs_direct_commit_schedule(struct nfs_direct_req *dreq)

fs/nfs/pnfs.c

+3 −0
Original line number Diff line number Diff line
@@ -703,6 +703,8 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list, 
			ret = -EAGAIN;

		spin_unlock(&inode->i_lock);

		pnfs_free_lseg_list(&lseg_list);

		/* Free all lsegs that are attached to commit buckets */

		nfs_commit_inode(inode, 0);

		pnfs_put_layout_hdr(lo);

		iput(inode);

	}
@@ -1811,6 +1813,7 @@ void pnfs_error_mark_layout_for_return(struct inode *inode, 
	pnfs_mark_matching_lsegs_return(lo, &free_me, &range);

	spin_unlock(&inode->i_lock);

	pnfs_free_lseg_list(&free_me);

	nfs_commit_inode(inode, 0);

}

EXPORT_SYMBOL_GPL(pnfs_error_mark_layout_for_return);

fs/nfs/pnfs.h

+6 −0
Original line number Diff line number Diff line
@@ -412,6 +412,12 @@ pnfs_get_lseg(struct pnfs_layout_segment *lseg) 
	return lseg;

}



static inline bool

pnfs_is_valid_lseg(struct pnfs_layout_segment *lseg)

{

	return test_bit(NFS_LSEG_VALID, &lseg->pls_flags) != 0;

}



/* Return true if a layout driver is being used for this mountpoint */

static inline int pnfs_enabled_sb(struct nfs_server *nfss)

{

fs/nfs/pnfs_nfs.c

+5 −0
Original line number Diff line number Diff line
@@ -868,6 +868,11 @@ pnfs_layout_mark_request_commit(struct nfs_page *req, 
	buckets = cinfo->ds->buckets;

	list = &buckets[ds_commit_idx].written;

	if (list_empty(list)) {

		if (!pnfs_is_valid_lseg(lseg)) {

			spin_unlock(cinfo->lock);

			cinfo->completion_ops->resched_write(cinfo, req);

			return;

		}

		/* Non-empty buckets hold a reference on the lseg.  That ref

		 * is normally transferred to the COMMIT call and released

		 * there.  It could also be released if the last req is pulled