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Registered in England and Wales under Company Registration No. 3798903 From: David Howells Subject: [PATCH 20/28] NFS: Configuration and mount option changes to enable local caching on NFS [try #2] To: viro@ftp.linux.org.uk, hch@infradead.org, Trond.Myklebust@netapp.com, sds@tycho.nsa.gov, casey@schaufler-ca.com Cc: linux-kernel@vger.kernel.org, selinux@tycho.nsa.gov, linux-security-module@vger.kernel.org, dhowells@redhat.com Date: Wed, 05 Dec 2007 19:40:00 +0000 Message-ID: <20071205194000.24617.69057.stgit@warthog.procyon.org.uk> In-Reply-To: <20071205193818.24617.79771.stgit@warthog.procyon.org.uk> References: <20071205193818.24617.79771.stgit@warthog.procyon.org.uk> User-Agent: StGIT/0.13 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3746 Lines: 115 Changes to the kernel configuration defintions and to the NFS mount options to allow the local caching support added by the previous patch to be enabled. Signed-off-by: David Howells --- fs/Kconfig | 8 ++++++++ fs/nfs/client.c | 2 ++ fs/nfs/internal.h | 1 + fs/nfs/super.c | 14 ++++++++++++++ 4 files changed, 25 insertions(+), 0 deletions(-) diff --git a/fs/Kconfig b/fs/Kconfig index 215b0d6..83d1227 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -1650,6 +1650,14 @@ config NFS_V4 If unsure, say N. +config NFS_FSCACHE + bool "Provide NFS client caching support (EXPERIMENTAL)" + depends on EXPERIMENTAL + depends on NFS_FS=m && FSCACHE || NFS_FS=y && FSCACHE=y + help + Say Y here if you want NFS data to be cached locally on disc through + the general filesystem cache manager + config NFS_DIRECTIO bool "Allow direct I/O on NFS files" depends on NFS_FS diff --git a/fs/nfs/client.c b/fs/nfs/client.c index acb2179..be38c3c 100644 --- a/fs/nfs/client.c +++ b/fs/nfs/client.c @@ -575,6 +575,7 @@ static int nfs_init_server(struct nfs_server *server, /* Initialise the client representation from the mount data */ server->flags = data->flags & NFS_MOUNT_FLAGMASK; + server->options = data->options; if (data->rsize) server->rsize = nfs_block_size(data->rsize, NULL); @@ -931,6 +932,7 @@ static int nfs4_init_server(struct nfs_server *server, /* Initialise the client representation from the mount data */ server->flags = data->flags & NFS_MOUNT_FLAGMASK; server->caps |= NFS_CAP_ATOMIC_OPEN; + server->options = data->options; if (data->rsize) server->rsize = nfs_block_size(data->rsize, NULL); diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h index f3acf48..ef09e00 100644 --- a/fs/nfs/internal.h +++ b/fs/nfs/internal.h @@ -35,6 +35,7 @@ struct nfs_parsed_mount_data { int acregmin, acregmax, acdirmin, acdirmax; int namlen; + unsigned int options; unsigned int bsize; unsigned int auth_flavor_len; rpc_authflavor_t auth_flavors[1]; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 040d65b..a5a3bd1 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -74,6 +74,7 @@ enum { Opt_acl, Opt_noacl, Opt_rdirplus, Opt_nordirplus, Opt_sharecache, Opt_nosharecache, + Opt_fscache, Opt_nofscache, /* Mount options that take integer arguments */ Opt_port, @@ -123,6 +124,8 @@ static match_table_t nfs_mount_option_tokens = { { Opt_nordirplus, "nordirplus" }, { Opt_sharecache, "sharecache" }, { Opt_nosharecache, "nosharecache" }, + { Opt_fscache, "fsc" }, + { Opt_nofscache, "nofsc" }, { Opt_port, "port=%u" }, { Opt_rsize, "rsize=%u" }, @@ -459,6 +462,8 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss, seq_printf(m, ",timeo=%lu", 10U * clp->retrans_timeo / HZ); seq_printf(m, ",retrans=%u", clp->retrans_count); seq_printf(m, ",sec=%s", nfs_pseudoflavour_to_name(nfss->client->cl_auth->au_flavor)); + if (nfss->options & NFS_OPTION_FSCACHE) + seq_printf(m, ",fsc"); } /* @@ -697,6 +702,15 @@ static int nfs_parse_mount_options(char *raw, break; case Opt_nosharecache: mnt->flags |= NFS_MOUNT_UNSHARED; + mnt->options &= ~NFS_OPTION_FSCACHE; + break; + case Opt_fscache: + /* sharing is mandatory with fscache */ + mnt->options |= NFS_OPTION_FSCACHE; + mnt->flags &= ~NFS_MOUNT_UNSHARED; + break; + case Opt_nofscache: + mnt->options &= ~NFS_OPTION_FSCACHE; break; case Opt_port: -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/