Return-Path: Received: from int-mailstore01.merit.edu ([207.75.116.232]:52411 "EHLO int-mailstore01.merit.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755521Ab1FGR0C (ORCPT ); Tue, 7 Jun 2011 13:26:02 -0400 Date: Tue, 7 Jun 2011 13:26:00 -0400 From: Jim Rees To: Benny Halevy Cc: linux-nfs@vger.kernel.org, peter honeyman Subject: [PATCH 01/88] pnfs: add set-clear layoutdriver interface Message-ID: References: Content-Type: text/plain; charset=us-ascii In-Reply-To: Sender: linux-nfs-owner@vger.kernel.org List-ID: MIME-Version: 1.0 From: Benny Halevy To allow layout driver to issue getdevicelist at mount time, and clean up at umount time. [fixup non NFS_V4_1 set_pnfs_layoutdriver definition] [pnfs: pass mntfh down the init_pnfs path] Signed-off-by: Benny Halevy --- fs/nfs/client.c | 7 ++++--- fs/nfs/pnfs.c | 15 +++++++++++++-- fs/nfs/pnfs.h | 8 ++++++-- 3 files changed, 23 insertions(+), 7 deletions(-) diff --git a/fs/nfs/client.c b/fs/nfs/client.c index b3dc2b8..6bdb7da0 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -906,7 +906,8 @@ error: /* * Load up the server record from information gained in an fsinfo record */ -static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo *fsinfo) +static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, + struct nfs_fsinfo *fsinfo) { unsigned long max_rpc_payload; @@ -936,7 +937,7 @@ static void nfs_server_set_fsinfo(struct nfs_server *server, struct nfs_fsinfo * if (server->wsize > NFS_MAX_FILE_IO_SIZE) server->wsize = NFS_MAX_FILE_IO_SIZE; server->wpages = (server->wsize + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; - set_pnfs_layoutdriver(server, fsinfo->layouttype); + set_pnfs_layoutdriver(server, mntfh, fsinfo->layouttype); server->wtmult = nfs_block_bits(fsinfo->wtmult, NULL); @@ -982,7 +983,7 @@ static int nfs_probe_fsinfo(struct nfs_server *server, struct nfs_fh *mntfh, str if (error < 0) goto out_error; - nfs_server_set_fsinfo(server, &fsinfo); + nfs_server_set_fsinfo(server, mntfh, &fsinfo); /* Get some general file system info */ if (server->namelen == 0) { diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c index 963be42..3b182cc 100644 --- a/fs/nfs/pnfs.c +++ b/fs/nfs/pnfs.c @@ -75,8 +75,11 @@ find_pnfs_driver(u32 id) void unset_pnfs_layoutdriver(struct nfs_server *nfss) { - if (nfss->pnfs_curr_ld) + if (nfss->pnfs_curr_ld) { + if (nfss->pnfs_curr_ld->clear_layoutdriver) + nfss->pnfs_curr_ld->clear_layoutdriver(nfss); module_put(nfss->pnfs_curr_ld->owner); + } nfss->pnfs_curr_ld = NULL; } @@ -87,7 +90,8 @@ unset_pnfs_layoutdriver(struct nfs_server *nfss) * @id layout type. Zero (illegal layout type) indicates pNFS not in use. */ void -set_pnfs_layoutdriver(struct nfs_server *server, u32 id) +set_pnfs_layoutdriver(struct nfs_server *server, const struct nfs_fh *mntfh, + u32 id) { struct pnfs_layoutdriver_type *ld_type = NULL; @@ -114,6 +118,13 @@ set_pnfs_layoutdriver(struct nfs_server *server, u32 id) goto out_no_driver; } server->pnfs_curr_ld = ld_type; + if (ld_type->set_layoutdriver && ld_type->set_layoutdriver(server, mntfh)) { + printk(KERN_ERR + "%s: Error initializing mount point for layout driver %u.\n", + __func__, id); + module_put(ld_type->owner); + goto out_no_driver; + } dprintk("%s: pNFS module for %u set\n", __func__, id); return; diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h index ba01e59..b8548d8 100644 --- a/fs/nfs/pnfs.h +++ b/fs/nfs/pnfs.h @@ -80,6 +80,9 @@ struct pnfs_layoutdriver_type { struct module *owner; unsigned flags; + int (*set_layoutdriver) (struct nfs_server *, const struct nfs_fh *); + int (*clear_layoutdriver) (struct nfs_server *); + struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags); void (*free_layout_hdr) (struct pnfs_layout_hdr *); @@ -169,7 +172,7 @@ struct pnfs_layout_segment * pnfs_update_layout(struct inode *ino, struct nfs_open_context *ctx, loff_t pos, u64 count, enum pnfs_iomode access_type, gfp_t gfp_flags); -void set_pnfs_layoutdriver(struct nfs_server *, u32 id); +void set_pnfs_layoutdriver(struct nfs_server *, const struct nfs_fh *, u32); void unset_pnfs_layoutdriver(struct nfs_server *); enum pnfs_try_status pnfs_try_to_write_data(struct nfs_write_data *, const struct rpc_call_ops *, int); @@ -396,7 +399,8 @@ pnfs_roc_drain(struct inode *ino, u32 *barrier) return false; } -static inline void set_pnfs_layoutdriver(struct nfs_server *s, u32 id) +static inline void set_pnfs_layoutdriver(struct nfs_server *s, + const struct nfs_fh *mntfh, u32 id); { } -- 1.7.4.1