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-rw-r--r--fs/nfs/client.c6
-rw-r--r--fs/nfs/file.c45
-rw-r--r--fs/nfs/super.c59
-rw-r--r--include/linux/nfs_mount.h3
4 files changed, 97 insertions, 16 deletions
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 4e7df2adb212..5f01f42b3991 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -635,7 +635,8 @@ static int nfs_create_rpc_client(struct nfs_client *clp,
*/
static void nfs_destroy_server(struct nfs_server *server)
{
- if (!(server->flags & NFS_MOUNT_NONLM))
+ if (!(server->flags & NFS_MOUNT_LOCAL_FLOCK) ||
+ !(server->flags & NFS_MOUNT_LOCAL_FCNTL))
nlmclnt_done(server->nlm_host);
}
@@ -657,7 +658,8 @@ static int nfs_start_lockd(struct nfs_server *server)
if (nlm_init.nfs_version > 3)
return 0;
- if (server->flags & NFS_MOUNT_NONLM)
+ if ((server->flags & NFS_MOUNT_LOCAL_FLOCK) &&
+ (server->flags & NFS_MOUNT_LOCAL_FCNTL))
return 0;
switch (clp->cl_proto) {
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index eb51bd6201da..59cbe1ba0511 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -684,7 +684,8 @@ static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
return ret;
}
-static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status = 0;
@@ -699,7 +700,7 @@ static int do_getlk(struct file *filp, int cmd, struct file_lock *fl)
if (nfs_have_delegation(inode, FMODE_READ))
goto out_noconflict;
- if (NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM)
+ if (is_local)
goto out_noconflict;
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
@@ -730,7 +731,8 @@ static int do_vfs_lock(struct file *file, struct file_lock *fl)
return res;
}
-static int do_unlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status;
@@ -745,15 +747,19 @@ static int do_unlk(struct file *filp, int cmd, struct file_lock *fl)
* If we're signalled while cleaning up locks on process exit, we
* still need to complete the unlock.
*/
- /* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
+ /*
+ * Use local locking if mounted with "-onolock" or with appropriate
+ * "-olocal_lock="
+ */
+ if (!is_local)
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
else
status = do_vfs_lock(filp, fl);
return status;
}
-static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
+static int
+do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
{
struct inode *inode = filp->f_mapping->host;
int status;
@@ -766,8 +772,11 @@ static int do_setlk(struct file *filp, int cmd, struct file_lock *fl)
if (status != 0)
goto out;
- /* Use local locking if mounted with "-onolock" */
- if (!(NFS_SERVER(inode)->flags & NFS_MOUNT_NONLM))
+ /*
+ * Use local locking if mounted with "-onolock" or with appropriate
+ * "-olocal_lock="
+ */
+ if (!is_local)
status = NFS_PROTO(inode)->lock(filp, cmd, fl);
else
status = do_vfs_lock(filp, fl);
@@ -791,6 +800,7 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
{
struct inode *inode = filp->f_mapping->host;
int ret = -ENOLCK;
+ int is_local = 0;
dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
filp->f_path.dentry->d_parent->d_name.name,
@@ -804,6 +814,9 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
goto out_err;
+ if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL)
+ is_local = 1;
+
if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
ret = NFS_PROTO(inode)->lock_check_bounds(fl);
if (ret < 0)
@@ -811,11 +824,11 @@ static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
}
if (IS_GETLK(cmd))
- ret = do_getlk(filp, cmd, fl);
+ ret = do_getlk(filp, cmd, fl, is_local);
else if (fl->fl_type == F_UNLCK)
- ret = do_unlk(filp, cmd, fl);
+ ret = do_unlk(filp, cmd, fl, is_local);
else
- ret = do_setlk(filp, cmd, fl);
+ ret = do_setlk(filp, cmd, fl, is_local);
out_err:
return ret;
}
@@ -825,6 +838,9 @@ out_err:
*/
static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
{
+ struct inode *inode = filp->f_mapping->host;
+ int is_local = 0;
+
dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
filp->f_path.dentry->d_parent->d_name.name,
filp->f_path.dentry->d_name.name,
@@ -833,14 +849,17 @@ static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
if (!(fl->fl_flags & FL_FLOCK))
return -ENOLCK;
+ if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
+ is_local = 1;
+
/* We're simulating flock() locks using posix locks on the server */
fl->fl_owner = (fl_owner_t)filp;
fl->fl_start = 0;
fl->fl_end = OFFSET_MAX;
if (fl->fl_type == F_UNLCK)
- return do_unlk(filp, cmd, fl);
- return do_setlk(filp, cmd, fl);
+ return do_unlk(filp, cmd, fl, is_local);
+ return do_setlk(filp, cmd, fl, is_local);
}
/*
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index ec3966e4706b..2e866d86c220 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -100,6 +100,7 @@ enum {
Opt_addr, Opt_mountaddr, Opt_clientaddr,
Opt_lookupcache,
Opt_fscache_uniq,
+ Opt_local_lock,
/* Special mount options */
Opt_userspace, Opt_deprecated, Opt_sloppy,
@@ -171,6 +172,7 @@ static const match_table_t nfs_mount_option_tokens = {
{ Opt_lookupcache, "lookupcache=%s" },
{ Opt_fscache_uniq, "fsc=%s" },
+ { Opt_local_lock, "local_lock=%s" },
{ Opt_err, NULL }
};
@@ -236,6 +238,22 @@ static match_table_t nfs_lookupcache_tokens = {
{ Opt_lookupcache_err, NULL }
};
+enum {
+ Opt_local_lock_all, Opt_local_lock_flock, Opt_local_lock_posix,
+ Opt_local_lock_none,
+
+ Opt_local_lock_err
+};
+
+static match_table_t nfs_local_lock_tokens = {
+ { Opt_local_lock_all, "all" },
+ { Opt_local_lock_flock, "flock" },
+ { Opt_local_lock_posix, "posix" },
+ { Opt_local_lock_none, "none" },
+
+ { Opt_local_lock_err, NULL }
+};
+
static void nfs_umount_begin(struct super_block *);
static int nfs_statfs(struct dentry *, struct kstatfs *);
@@ -1009,9 +1027,13 @@ static int nfs_parse_mount_options(char *raw,
break;
case Opt_lock:
mnt->flags &= ~NFS_MOUNT_NONLM;
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
break;
case Opt_nolock:
mnt->flags |= NFS_MOUNT_NONLM;
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
break;
case Opt_v2:
mnt->flags &= ~NFS_MOUNT_VER3;
@@ -1412,6 +1434,34 @@ static int nfs_parse_mount_options(char *raw,
mnt->fscache_uniq = string;
mnt->options |= NFS_OPTION_FSCACHE;
break;
+ case Opt_local_lock:
+ string = match_strdup(args);
+ if (string == NULL)
+ goto out_nomem;
+ token = match_token(string, nfs_local_lock_tokens,
+ args);
+ kfree(string);
+ switch (token) {
+ case Opt_local_lock_all:
+ mnt->flags |= (NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ case Opt_local_lock_flock:
+ mnt->flags |= NFS_MOUNT_LOCAL_FLOCK;
+ break;
+ case Opt_local_lock_posix:
+ mnt->flags |= NFS_MOUNT_LOCAL_FCNTL;
+ break;
+ case Opt_local_lock_none:
+ mnt->flags &= ~(NFS_MOUNT_LOCAL_FLOCK |
+ NFS_MOUNT_LOCAL_FCNTL);
+ break;
+ default:
+ dfprintk(MOUNT, "NFS: invalid "
+ "local_lock argument\n");
+ return 0;
+ };
+ break;
/*
* Special options
@@ -1817,6 +1867,12 @@ static int nfs_validate_mount_data(void *options,
if (!args->nfs_server.hostname)
goto out_nomem;
+ if (!(data->flags & NFS_MOUNT_NONLM))
+ args->flags &= ~(NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
+ else
+ args->flags |= (NFS_MOUNT_LOCAL_FLOCK|
+ NFS_MOUNT_LOCAL_FCNTL);
/*
* The legacy version 6 binary mount data from userspace has a
* field used only to transport selinux information into the
@@ -2433,7 +2489,8 @@ static void nfs4_fill_super(struct super_block *sb)
static void nfs4_validate_mount_flags(struct nfs_parsed_mount_data *args)
{
- args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3);
+ args->flags &= ~(NFS_MOUNT_NONLM|NFS_MOUNT_NOACL|NFS_MOUNT_VER3|
+ NFS_MOUNT_LOCAL_FLOCK|NFS_MOUNT_LOCAL_FCNTL);
}
static int nfs4_validate_text_mount_data(void *options,
diff --git a/include/linux/nfs_mount.h b/include/linux/nfs_mount.h
index 5d59ae861aa6..576bddd72e04 100644
--- a/include/linux/nfs_mount.h
+++ b/include/linux/nfs_mount.h
@@ -71,4 +71,7 @@ struct nfs_mount_data {
#define NFS_MOUNT_NORESVPORT 0x40000
#define NFS_MOUNT_LEGACY_INTERFACE 0x80000
+#define NFS_MOUNT_LOCAL_FLOCK 0x100000
+#define NFS_MOUNT_LOCAL_FCNTL 0x200000
+
#endif