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[PATCH v3, RESEND 00/16] make rpc_pipefs be mountable multiple time [message #42046] Tue, 08 February 2011 18:41 Go to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
v3:
- rebase to the current Linus' tree (52cfd503ad)
- rework get_rpc_pipefs() once again;
- solve problem with rmmod sunrpc moudle;
- free dns cache on killing rpc_pipefs superblock.

v2:
- one of rpc_create() calls was missed initially, fixed;
- change logic for get_rpc_pipefs(NULL);
- export get_rpc_pipefs() to be able to use from modules (tnx J. Bruce Field);
- change "From:" and "Signed-off-by:" addresses.

v1:
- initial revision of the patchset.

Kirill A. Shutemov (16):
sunrpc: mount rpc_pipefs on initialization
sunrpc: introduce init_rpc_pipefs
sunrpc: push init_rpc_pipefs up to rpc_create() callers
sunrpc: tag svc_serv with rpc_pipefs mount point
sunrpc: get rpc_pipefs mount point for svc_serv from callers
lockd: get rpc_pipefs mount point from callers
sunrpc: get rpc_pipefs mount point for rpcb_create[_local] from
callers
sunrpc: tag pipefs field of cache_detail with rpc_pipefs mount point
sunrpc: introduce rpc_pipefs_add_destroy_cb()
nfs: per-rpc_pipefs dns cache
Export iterate_mounts symbol to be able to use from sunrpc module.
sunrpc: introduce get_rpc_pipefs()
nfs: introduce mount option 'rpcmount'
sunrpc: make rpc_pipefs be mountable multiple times
sunrpc: remove global init_rpc_pipefs
Rework get_rpc_pipefs() and introduce put_rpc_pipefs()

fs/lockd/clntlock.c | 8 +-
fs/lockd/host.c | 15 ++-
fs/lockd/mon.c | 13 ++-
fs/lockd/svc.c | 4 +-
fs/namespace.c | 1 +
fs/nfs/cache_lib.c | 18 +--
fs/nfs/cache_lib.h | 3 +-
fs/nfs/callback.c | 7 +-
fs/nfs/callback.h | 3 +-
fs/nfs/client.c | 45 ++++++-
fs/nfs/dns_resolve.c | 137 ++++++++++++++++-----
fs/nfs/dns_resolve.h | 15 +--
fs/nfs/inode.c | 9 +--
fs/nfs/internal.h | 10 ++-
fs/nfs/mount_clnt.c | 1 +
fs/nfs/namespace.c | 3 +-
fs/nfs/nfs4namespace.c | 20 ++--
fs/nfs/super.c | 20 +++
fs/nfsd/nfs4callback.c | 5 +
fs/nfsd/nfssvc.c | 20 +++-
include/linux/lockd/bind.h | 3 +-
include/linux/lockd/lockd.h | 4 +-
include/linux/nfs_fs_sb.h | 1 +
include/linux/sunrpc/cache.h | 9 +-
include/linux/sunrpc/clnt.h | 5 +-
include/linux/sunrpc/rpc_pipe_fs.h | 7 +-
include/linux/sunrpc/svc.h | 9 +-
net/sunrpc/cache.c | 16 ++-
net/sunrpc/clnt.c | 19 ++--
net/sunrpc/rpc_pipe.c | 235 ++++++++++++++++++++++++++++++++----
net/sunrpc/rpcb_clnt.c | 19 ++-
net/sunrpc/svc.c | 52 +++++---
32 files changed, 549 insertions(+), 187 deletions(-)

--
1.7.4

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[PATCH v3, RESEND 03/16] sunrpc: push init_rpc_pipefs up to rpc_create() callers [message #42047 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/lockd/host.c | 2 ++
fs/lockd/mon.c | 2 ++
fs/nfs/client.c | 2 ++
fs/nfs/mount_clnt.c | 2 ++
fs/nfsd/nfs4callback.c | 2 ++
include/linux/sunrpc/clnt.h | 1 +
net/sunrpc/clnt.c | 11 +++++++----
net/sunrpc/rpcb_clnt.c | 3 +++
8 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index b7c99bf..45e973f 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -14,6 +14,7 @@
#include <linux/in6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/lockd/lockd.h>
#include <linux/mutex.h>

@@ -463,6 +464,7 @@ nlm_bind_host(struct nlm_host *host)
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_AUTOBIND),
+ .rpcmount = init_rpc_pipefs,
};

/*
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 23d7451..6219026 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -15,6 +15,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/lockd/lockd.h>

#include <asm/unaligned.h>
@@ -78,6 +79,7 @@ static struct rpc_clnt *nsm_create(void)
.version = NSM_VERSION,
.authflavor = RPC_AUTH_NULL,
.flags = RPC_CLNT_CREATE_NOPING,
+ .rpcmount = init_rpc_pipefs,
};

return rpc_create(&args);
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index bd3ca32..0e0a952 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -25,6 +25,7 @@
#include <linux/sunrpc/metrics.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/xprtrdma.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/nfs_fs.h>
#include <linux/nfs_mount.h>
#include <linux/nfs4_mount.h>
@@ -628,6 +629,7 @@ static int nfs_create_rpc_client(struct nfs_client *clp,
.program = &nfs_program,
.version = clp->rpc_ops->version,
.authflavor = flavor,
+ .rpcmount = init_rpc_pipefs,
};

if (discrtry)
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index d4c2d6b..6227875 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -13,6 +13,7 @@
#include <linux/in.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/nfs_fs.h>
#include "internal.h"

@@ -161,6 +162,7 @@ int nfs_mount(struct nfs_mount_request *info)
.program = &mnt_program,
.version = info->version,
.authflavor = RPC_AUTH_UNIX,
+ .rpcmount = init_rpc_pipefs,
};
struct rpc_clnt *mnt_clnt;
int status;
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 3be975e..6636ab2 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -33,6 +33,7 @@

#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc_xprt.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/slab.h>
#include "nfsd.h"
#include "state.h"
@@ -645,6 +646,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
.version = 0,
.authflavor = clp->cl_flavor,
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
+ .rpcmount = init_rpc_pipefs,
};
struct rpc_clnt *client;

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index ef9476a..dffaaaa 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -116,6 +116,7 @@ struct rpc_create_args {
unsigned long flags;
char *client_name;
struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
+ struct vfsmount *rpcmount;
};

/* Values for "flags" field */
diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index f3812d0..6e1d923 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -96,7 +96,8 @@ static void rpc_unregister_client(struct rpc_clnt *clnt)
}

static int
-rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
+rpc_setup_pipedir(struct rpc_clnt *clnt, struct vfsmount *rpcmount,
+ char *dir_name)
{
static uint32_t clntid;
struct nameidata nd;
@@ -112,7 +113,7 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
if (dir_name == NULL)
return 0;

- path.mnt = mntget(init_rpc_pipefs);
+ path.mnt = mntget(rpcmount);
error = vfs_path_lookup(path.mnt->mnt_root, path.mnt, dir_name, 0, &nd);
if (error)
goto err;
@@ -226,7 +227,8 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, stru

atomic_set(&clnt->cl_count, 1);

- err = rpc_setup_pipedir(clnt, program->pipe_dir_name);
+ BUG_ON(!args->rpcmount);
+ err = rpc_setup_pipedir(clnt, args->rpcmount, program->pipe_dir_name);
if (err < 0)
goto out_no_path;

@@ -390,7 +392,8 @@ rpc_clone_client(struct rpc_clnt *clnt)
goto out_no_principal;
}
atomic_set(&new->cl_count, 1);
- err = rpc_setup_pipedir(new, clnt->cl_program->pipe_dir_name);
+ err = rpc_setup_pipedir(new, clnt->cl_path.mnt,
+ clnt->cl_program->pipe_dir_name);
if (err != 0)
goto out_no_path;
if (new->cl_auth)
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index c652e4c..b059cbe 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -27,6 +27,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xprtsock.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY RPCDBG_BIND
@@ -182,6 +183,7 @@ static int rpcb_create_local(void)
.version = RPCBVERS_2,
.authflavor = RPC_AUTH_UNIX,
.flags = RPC_CLNT_CREATE_NOPING,
+ .rpcmount = init_rpc_pipefs,
};
struct rpc_clnt *clnt, *clnt4;
int result = 0;
@@ -236,6 +238,7 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_NONPRIVPORT),
+ .rpcmount = init_rpc_pipefs,
};

switch (srvaddr->sa_family) {
--
1.7.4

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[PATCH v3, RESEND 02/16] sunrpc: introduce init_rpc_pipefs [message #42048 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Introduce global variable init_rpc_pipefs and use it instead of
rpc_get_mount()/rpc_put_mount().

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfs/cache_lib.c | 6 +++---
include/linux/sunrpc/rpc_pipe_fs.h | 4 ++--
net/sunrpc/clnt.c | 10 ++++------
net/sunrpc/rpc_pipe.c | 21 +++++----------------
4 files changed, 14 insertions(+), 27 deletions(-)

diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index 8469031..dd7ca5f 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -117,7 +117,7 @@ int nfs_cache_register(struct cache_detail *cd)
struct vfsmount *mnt;
int ret;

- mnt = rpc_get_mount();
+ mnt = mntget(init_rpc_pipefs);
if (IS_ERR(mnt))
return PTR_ERR(mnt);
ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &nd);
@@ -129,13 +129,13 @@ int nfs_cache_register(struct cache_detail *cd)
if (!ret)
return ret;
err:
- rpc_put_mount();
+ mntput(mnt);
return ret;
}

void nfs_cache_unregister(struct cache_detail *cd)
{
sunrpc_cache_unregister_pipefs(cd);
- rpc_put_mount();
+ mntput(init_rpc_pipefs);
}

diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index cf14db9..b09bfa5 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -44,6 +44,8 @@ RPC_I(struct inode *inode)
return container_of(inode, struct rpc_inode, vfs_inode);
}

+extern struct vfsmount *init_rpc_pipefs;
+
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);

struct rpc_clnt;
@@ -60,8 +62,6 @@ extern void rpc_remove_cache_dir(struct dentry *);
extern struct dentry *rpc_mkpipe(struct dentry *, const char *, void *,
const struct rpc_pipe_ops *, int flags);
extern int rpc_unlink(struct dentry *);
-extern struct vfsmount *rpc_get_mount(void);
-extern void rpc_put_mount(void);
extern int register_rpc_pipefs(void);
extern void unregister_rpc_pipefs(void);

diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c
index 57d344c..f3812d0 100644
--- a/net/sunrpc/clnt.c
+++ b/net/sunrpc/clnt.c
@@ -112,9 +112,7 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
if (dir_name == NULL)
return 0;

- path.mnt = rpc_get_mount();
- if (IS_ERR(path.mnt))
- return PTR_ERR(path.mnt);
+ path.mnt = mntget(init_rpc_pipefs);
error = vfs_path_lookup(path.mnt->mnt_root, path.mnt, dir_name, 0, &nd);
if (error)
goto err;
@@ -140,7 +138,7 @@ rpc_setup_pipedir(struct rpc_clnt *clnt, char *dir_name)
err_path_put:
path_put(&nd.path);
err:
- rpc_put_mount();
+ mntput(path.mnt);
return error;
}

@@ -251,7 +249,7 @@ static struct rpc_clnt * rpc_new_client(const struct rpc_create_args *args, stru
out_no_auth:
if (!IS_ERR(clnt->cl_path.dentry)) {
rpc_remove_client_dir(clnt->cl_path.dentry);
- rpc_put_mount();
+ mntput(clnt->cl_path.mnt);
}
out_no_path:
kfree(clnt->cl_principal);
@@ -472,7 +470,7 @@ rpc_free_client(struct rpc_clnt *clnt)
clnt->cl_protname, clnt->cl_server);
if (!IS_ERR(clnt->cl_path.dentry)) {
rpc_remove_client_dir(clnt->cl_path.dentry);
- rpc_put_mount();
+ mntput(clnt->cl_path.mnt);
}
if (clnt->cl_parent != clnt) {
rpc_release_client(clnt->cl_parent);
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 9ab9355..484c9a3 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -28,7 +28,8 @@
#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/cache.h>

-static struct vfsmount *rpc_mnt __read_mostly;
+struct vfsmount *init_rpc_pipefs __read_mostly;
+EXPORT_SYMBOL_GPL(init_rpc_pipefs);

static struct file_system_type rpc_pipe_fs_type;

@@ -420,18 +421,6 @@ struct rpc_filelist {
umode_t mode;
};

-struct vfsmount *rpc_get_mount(void)
-{
- return mntget(rpc_mnt);
-}
-EXPORT_SYMBOL_GPL(rpc_get_mount);
-
-void rpc_put_mount(void)
-{
- mntput(rpc_mnt);
-}
-EXPORT_SYMBOL_GPL(rpc_put_mount);
-
static int rpc_delete_dentry(const struct dentry *dentry)
{
return 1;
@@ -1068,9 +1057,9 @@ int register_rpc_pipefs(void)
if (err)
goto destroy_cache;

- rpc_mnt = kern_mount(&rpc_pipe_fs_type);
- if (IS_ERR(rpc_mnt)) {
- err = PTR_ERR(rpc_mnt);
+ init_rpc_pipefs = kern_mount(&rpc_pipe_fs_type);
+ if (IS_ERR(init_rpc_pipefs)) {
+ err = PTR_ERR(init_rpc_pipefs);
goto unregister_fs;
}

--
1.7.4

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[PATCH v3, RESEND 05/16] sunrpc: get rpc_pipefs mount point for svc_serv from callers [message #42049 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/lockd/svc.c | 4 +++-
fs/nfs/callback.c | 4 +++-
fs/nfsd/nfssvc.c | 6 ++++--
include/linux/sunrpc/svc.h | 8 ++++----
net/sunrpc/svc.c | 18 +++++++++---------
5 files changed, 23 insertions(+), 17 deletions(-)

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index abfff9d..32310b1 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -31,6 +31,7 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <net/ip.h>
#include <linux/lockd/lockd.h>
#include <linux/nfs.h>
@@ -269,7 +270,8 @@ int lockd_up(void)
"lockd_up: no pid, %d users??\n", nlmsvc_users);

error = -ENOMEM;
- serv = svc_create(&nlmsvc_program, LOCKD_BUFSIZE, NULL);
+ serv = svc_create(&nlmsvc_program, init_rpc_pipefs, LOCKD_BUFSIZE,
+ NULL);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
goto out;
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index e3d2942..c9b98ad 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -16,6 +16,7 @@
#include <linux/freezer.h>
#include <linux/kthread.h>
#include <linux/sunrpc/svcauth_gss.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/sunrpc/bc_xprt.h>

#include <net/inet_sock.h>
@@ -259,7 +260,8 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
nfs_callback_bc_serv(minorversion, xprt, cb_info);
goto out;
}
- serv = svc_create(&nfs4_callback_program, NFS4_CALLBACK_BUFSIZE, NULL);
+ serv = svc_create(&nfs4_callback_program, init_rpc_pipefs,
+ NFS4_CALLBACK_BUFSIZE, NULL);
if (!serv) {
ret = -ENOMEM;
goto out_err;
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 18743c4..e4fc85d 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -13,6 +13,7 @@

#include <linux/sunrpc/stats.h>
#include <linux/sunrpc/svcsock.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/lockd/bind.h>
#include <linux/nfsacl.h>
#include <linux/seq_file.h>
@@ -331,8 +332,9 @@ int nfsd_create_serv(void)
}
nfsd_reset_versions();

- nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
- nfsd_last_thread, nfsd, THIS_MODULE);
+ nfsd_serv = svc_create_pooled(&nfsd_program, init_rpc_pipefs,
+ nfsd_max_blksize, nfsd_last_thread, nfsd,
+ THIS_MODULE);
if (nfsd_serv == NULL)
return -ENOMEM;

diff --git a/include/linux/sunrpc/svc.h b/include/linux/sunrpc/svc.h
index 0cfd8e8..be15862 100644
--- a/include/linux/sunrpc/svc.h
+++ b/include/linux/sunrpc/svc.h
@@ -401,13 +401,13 @@ struct svc_procedure {
/*
* Function prototypes.
*/
-struct svc_serv *svc_create(struct svc_program *, unsigned int,
- void (*shutdown)(struct svc_serv *));
+struct svc_serv *svc_create(struct svc_program *, struct vfsmount *,
+ unsigned int, void (*shutdown)(struct svc_serv *));
struct svc_rqst *svc_prepare_thread(struct svc_serv *serv,
struct svc_pool *pool);
void svc_exit_thread(struct svc_rqst *);
-struct svc_serv * svc_create_pooled(struct svc_program *, unsigned int,
- void (*shutdown)(struct svc_serv *),
+struct svc_serv * svc_create_pooled(struct svc_program *, struct vfsmount *,
+ unsigned int, void (*shutdown)(struct svc_serv *),
svc_thread_fn, struct module *);
int svc_set_num_threads(struct svc_serv *, struct svc_pool *, int);
int svc_pool_stats_open(struct svc_serv *serv, struct file *file);
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 370bc46..63abe2b 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -28,7 +28,6 @@
#include <linux/sunrpc/svcsock.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/bc_xprt.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>

#define RPCDBG_FACILITY RPCDBG_SVCDSP

@@ -361,7 +360,8 @@ svc_pool_for_cpu(struct svc_serv *serv, int cpu)
* Create an RPC service
*/
static struct svc_serv *
-__svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
+__svc_create(struct svc_program *prog, struct vfsmount *rpcmount,
+ unsigned int bufsize, int npools,
void (*shutdown)(struct svc_serv *serv))
{
struct svc_serv *serv;
@@ -373,7 +373,7 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
return NULL;
serv->sv_name = prog->pg_name;
serv->sv_program = prog;
- serv->sv_rpcmount = mntget(init_rpc_pipefs);
+ serv->sv_rpcmount = mntget(rpcmount);
serv->sv_nrthreads = 1;
serv->sv_stats = prog->pg_stats;
if (bufsize > RPCSVC_MAXPAYLOAD)
@@ -429,22 +429,22 @@ __svc_create(struct svc_program *prog, unsigned int bufsize, int npools,
}

struct svc_serv *
-svc_create(struct svc_program *prog, unsigned int bufsize,
- void (*shutdown)(struct svc_serv *serv))
+svc_create(struct svc_program *prog, struct vfsmount *rpcmount,
+ unsigned int bufsize, void (*shutdown)(struct svc_serv *serv))
{
- return __svc_create(prog, bufsize, /*npools*/1, shutdown);
+ return __svc_create(prog, rpcmount, bufsize, /*npools*/1, shutdown);
}
EXPORT_SYMBOL_GPL(svc_create);

struct svc_serv *
-svc_create_pooled(struct svc_program *prog, unsigned int bufsize,
- void (*shutdown)(struct svc_serv *serv),
+svc_create_pooled(struct svc_program *prog, struct vfsmount *rpcmount,
+ unsigned int bufsize, void (*shutdown)(struct svc_serv *serv),
svc_thread_fn func, struct module *mod)
{
struct svc_serv *serv;
unsigned int npools = svc_pool_map_get();

- serv = __svc_create(prog, bufsize, npools, shutdown);
+ serv = __svc_create(prog, rpcmount, bufsize, npools, shutdown);

if (serv != NULL) {
serv->sv_function = func;
--
1.7.4

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[PATCH v3, RESEND 06/16] lockd: get rpc_pipefs mount point from callers [message #42050 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/lockd/clntlock.c | 8 +++++---
fs/lockd/host.c | 17 ++++++++++++++---
fs/lockd/mon.c | 15 ++++++++-------
fs/lockd/svc.c | 6 ++----
fs/nfs/client.c | 1 +
fs/nfsd/nfssvc.c | 2 +-
include/linux/lockd/bind.h | 3 ++-
include/linux/lockd/lockd.h | 4 +++-
8 files changed, 36 insertions(+), 20 deletions(-)

diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index 8d4ea83..4664c56 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -56,13 +56,14 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
int status;

- status = lockd_up();
+ status = lockd_up(nlm_init->rpcmount);
if (status < 0)
return ERR_PTR(status);

host = nlmclnt_lookup_host(nlm_init->address, nlm_init->addrlen,
nlm_init->protocol, nlm_version,
- nlm_init->hostname, nlm_init->noresvport);
+ nlm_init->hostname, nlm_init->noresvport,
+ nlm_init->rpcmount);
if (host == NULL) {
lockd_down();
return ERR_PTR(-ENOLCK);
@@ -223,7 +224,8 @@ reclaimer(void *ptr)
allow_signal(SIGKILL);

down_write(&host->h_rwsem);
- lockd_up(); /* note: this cannot fail as lockd is already running */
+ /* note: this cannot fail as lockd is already running */
+ lockd_up(host->h_rpcmount);

dprintk("lockd: reclaiming locks for host %s\n", host->h_name);

diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 45e973f..b4cb391 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -14,9 +14,10 @@
#include <linux/in6.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/lockd/lockd.h>
#include <linux/mutex.h>
+#include <linux/mount.h>
+

#include <net/ipv6.h>

@@ -55,6 +56,7 @@ struct nlm_lookup_host_info {
const char *hostname; /* remote's hostname */
const size_t hostname_len; /* it's length */
const int noresvport; /* use non-priv port */
+ struct vfsmount *rpcmount; /* rpc_pipefs mount point */
};

/*
@@ -134,6 +136,7 @@ static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni,
host->h_srcaddrlen = 0;

host->h_rpcclnt = NULL;
+ host->h_rpcmount = mntget(ni->rpcmount);
host->h_name = nsm->sm_name;
host->h_version = ni->version;
host->h_proto = ni->protocol;
@@ -179,6 +182,7 @@ static void nlm_destroy_host_locked(struct nlm_host *host)

nsm_unmonitor(host);
nsm_release(host->h_nsmhandle);
+ mntput(host->h_rpcmount);

clnt = host->h_rpcclnt;
if (clnt != NULL)
@@ -207,7 +211,8 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
const unsigned short protocol,
const u32 version,
const char *hostname,
- int noresvport)
+ int noresvport,
+ struct vfsmount *rpcmount)
{
struct nlm_lookup_host_info ni = {
.server = 0,
@@ -218,6 +223,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
.hostname = hostname,
.hostname_len = strlen(hostname),
.noresvport = noresvport,
+ .rpcmount = rpcmount,
};
struct hlist_head *chain;
struct hlist_node *pos;
@@ -243,6 +249,8 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
continue;
if (host->h_version != version)
continue;
+ if (host->h_rpcmount->mnt_sb != ni.rpcmount->mnt_sb)
+ continue;

nlm_get_host(host);
dprintk("lockd: %s found host %s (%s)\n", __func__,
@@ -333,6 +341,7 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp,
.version = rqstp->rq_vers,
.hostname = hostname,
.hostname_len = hostname_len,
+ .rpcmount = rqstp->rq_server->sv_rpcmount,
};

dprintk("lockd: %s(host='%*s', vers=%u, proto=%s)\n", __func__,
@@ -374,6 +383,8 @@ struct nlm_host *nlmsvc_lookup_host(const struct svc_rqst *rqstp,
continue;
if (!rpc_cmp_addr(nlm_srcaddr(host), src_sap))
continue;
+ if (host->h_rpcmount->mnt_sb != ni.rpcmount->mnt_sb)
+ continue;

/* Move to head of hash chain. */
hlist_del(&host->h_hash);
@@ -464,7 +475,7 @@ nlm_bind_host(struct nlm_host *host)
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_AUTOBIND),
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = host->h_rpcmount,
};

/*
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 6219026..a121f5e 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -15,7 +15,6 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/xprtsock.h>
#include <linux/sunrpc/svc.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/lockd/lockd.h>

#include <asm/unaligned.h>
@@ -63,7 +62,7 @@ static inline struct sockaddr *nsm_addr(const struct nsm_handle *nsm)
return (struct sockaddr *)&nsm->sm_addr;
}

-static struct rpc_clnt *nsm_create(void)
+static struct rpc_clnt *nsm_create(struct vfsmount *rpcmount)
{
struct sockaddr_in sin = {
.sin_family = AF_INET,
@@ -79,13 +78,14 @@ static struct rpc_clnt *nsm_create(void)
.version = NSM_VERSION,
.authflavor = RPC_AUTH_NULL,
.flags = RPC_CLNT_CREATE_NOPING,
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = rpcmount,
};

return rpc_create(&args);
}

-static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
+static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res,
+ struct vfsmount *rpcmount)
{
struct rpc_clnt *clnt;
int status;
@@ -101,7 +101,7 @@ static int nsm_mon_unmon(struct nsm_handle *nsm, u32 proc, struct nsm_res *res)
.rpc_resp = res,
};

- clnt = nsm_create();
+ clnt = nsm_create(rpcmount);
if (IS_ERR(clnt)) {
status = PTR_ERR(clnt);
dprintk("lockd: failed to create NSM upcall transport, "
@@ -151,7 +151,7 @@ int nsm_monitor(const struct nlm_host *host)
*/
nsm->sm_mon_name = nsm_use_hostnames ? nsm->sm_name : nsm->sm_addrbuf;

- status = nsm_mon_unmon(nsm, NSMPROC_MON, &res);
+ status = nsm_mon_unmon(nsm, NSMPROC_MON, &res, host->h_rpcmount);
if (unlikely(res.status != 0))
status = -EIO;
if (unlikely(status < 0)) {
@@ -185,7 +185,8 @@ void nsm_unmonitor(const struct nlm_host *host)
&& nsm->sm_monitored && !nsm->sm_sticky) {
dprintk("lockd: nsm_unmonitor(%s)\n", nsm->sm_name);

- status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res);
+ status = nsm_mon_unmon(nsm, NSMPROC_UNMON, &res,
+ host->h_rpcmount);
if (res.status != 0)
status = -EIO;
if (status < 0)
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 32310b1..7387b04 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -31,7 +31,6 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
#include <linux/sunrpc/svcsock.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>
#include <net/ip.h>
#include <linux/lockd/lockd.h>
#include <linux/nfs.h>
@@ -249,7 +248,7 @@ out_err:
/*
* Bring up the lockd process if it's not already up.
*/
-int lockd_up(void)
+int lockd_up(struct vfsmount *rpcmount)
{
struct svc_serv *serv;
int error = 0;
@@ -270,8 +269,7 @@ int lockd_up(void)
"lockd_up: no pid, %d users??\n", nlmsvc_users);

error = -ENOMEM;
- serv = svc_create(&nlmsvc_program, init_rpc_pipefs, LOCKD_BUFSIZE,
- NULL);
+ serv = svc_create(&nlmsvc_program, rpcmount, LOCKD_BUFSIZE, NULL);
if (!serv) {
printk(KERN_WARNING "lockd_up: create service failed\n");
goto out;
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 0e0a952..79c01f8 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -675,6 +675,7 @@ static int nfs_start_lockd(struct nfs_server *server)
.nfs_version = clp->rpc_ops->version,
.noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
1 : 0,
+ .rpcmount = init_rpc_pipefs,
};

if (nlm_init.nfs_version > 3)
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index e4fc85d..dc11012 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -220,7 +220,7 @@ static int nfsd_startup(unsigned short port, int nrservs)
ret = nfsd_init_socks(port);
if (ret)
goto out_racache;
- ret = lockd_up();
+ ret = lockd_up(init_rpc_pipefs);
if (ret)
goto out_racache;
ret = nfs4_state_start();
diff --git a/include/linux/lockd/bind.h b/include/linux/lockd/bind.h
index fbc48f8..97cd4bf 100644
--- a/include/linux/lockd/bind.h
+++ b/include/linux/lockd/bind.h
@@ -42,6 +42,7 @@ struct nlmclnt_initdata {
unsigned short protocol;
u32 nfs_version;
int noresvport;
+ struct vfsmount *rpcmount;
};

/*
@@ -53,7 +54,7 @@ extern void nlmclnt_done(struct nlm_host *host);

extern int nlmclnt_proc(struct nlm_host *host, int cmd,
struct file_lock *fl);
-extern int lockd_up(void);
+extern int lockd_up(struct vfsmount *rpcmount);
extern void lockd_down(void);

#endif /* LINUX_LOCKD_BIND_H */
diff --git a/include/linux/lockd/lockd.h b/include/linux/lockd/lockd.h
index ff9abff..32dbb7f 100644
--- a/include/linux/lockd/lockd.h
+++ b/include/linux/lockd/lockd.h
@@ -44,6 +44,7 @@ struct nlm_host {
size_t h_addrlen;
struct sockaddr_storage h_srcaddr; /* our address (optional) */
size_t h_srcaddrlen;
+ struct vfsmount *h_rpcmount; /* rpc_pipefs mount point */
struct rpc_clnt *h_rpcclnt; /* RPC client to talk to peer */
char *h_name; /* remote hostname */
u32 h_version; /* interface version */
@@ -222,7 +223,8 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
const unsigned short protocol,
const u32 version,
const char *hostname,
- int nor
...

[PATCH v3, RESEND 08/16] sunrpc: tag pipefs field of cache_detail with rpc_pipefs mount point [message #42051 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfs/cache_lib.c | 3 +--
include/linux/sunrpc/cache.h | 9 +++------
net/sunrpc/cache.c | 16 ++++++++++------
3 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index dd7ca5f..0944d4e 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -123,7 +123,7 @@ int nfs_cache_register(struct cache_detail *cd)
ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &nd);
if (ret)
goto err;
- ret = sunrpc_cache_register_pipefs(nd.path.dentry,
+ ret = sunrpc_cache_register_pipefs(mnt, nd.path.dentry,
cd->name, 0600, cd);
path_put(&nd.path);
if (!ret)
@@ -136,6 +136,5 @@ err:
void nfs_cache_unregister(struct cache_detail *cd)
{
sunrpc_cache_unregister_pipefs(cd);
- mntput(init_rpc_pipefs);
}

diff --git a/include/linux/sunrpc/cache.h b/include/linux/sunrpc/cache.h
index 7898ea1..a5957cb 100644
--- a/include/linux/sunrpc/cache.h
+++ b/include/linux/sunrpc/cache.h
@@ -65,10 +65,6 @@ struct cache_detail_procfs {
struct proc_dir_entry *flush_ent, *channel_ent, *content_ent;
};

-struct cache_detail_pipefs {
- struct dentry *dir;
-};
-
struct cache_detail {
struct module * owner;
int hash_size;
@@ -115,7 +111,7 @@ struct cache_detail {

union {
struct cache_detail_procfs procfs;
- struct cache_detail_pipefs pipefs;
+ struct path pipefs;
} u;
};

@@ -202,7 +198,8 @@ extern int cache_register_net(struct cache_detail *cd, struct net *net);
extern void cache_unregister(struct cache_detail *cd);
extern void cache_unregister_net(struct cache_detail *cd, struct net *net);

-extern int sunrpc_cache_register_pipefs(struct dentry *parent, const char *,
+extern int sunrpc_cache_register_pipefs(struct vfsmount *rpcmount,
+ struct dentry *parent, const char *,
mode_t, struct cache_detail *);
extern void sunrpc_cache_unregister_pipefs(struct cache_detail *);

diff --git a/net/sunrpc/cache.c b/net/sunrpc/cache.c
index 72ad836..cfc225a 100644
--- a/net/sunrpc/cache.c
+++ b/net/sunrpc/cache.c
@@ -28,6 +28,7 @@
#include <linux/workqueue.h>
#include <linux/mutex.h>
#include <linux/pagemap.h>
+#include <linux/mount.h>
#include <asm/ioctls.h>
#include <linux/sunrpc/types.h>
#include <linux/sunrpc/cache.h>
@@ -1777,7 +1778,8 @@ const struct file_operations cache_flush_operations_pipefs = {
.llseek = no_llseek,
};

-int sunrpc_cache_register_pipefs(struct dentry *parent,
+int sunrpc_cache_register_pipefs(struct vfsmount *rpcmount,
+ struct dentry *parent,
const char *name, mode_t umode,
struct cache_detail *cd)
{
@@ -1790,9 +1792,10 @@ int sunrpc_cache_register_pipefs(struct dentry *parent,
q.len = strlen(name);
q.hash = full_name_hash(q.name, q.len);
dir = rpc_create_cache_dir(parent, &q, umode, cd);
- if (!IS_ERR(dir))
- cd->u.pipefs.dir = dir;
- else {
+ if (!IS_ERR(dir)) {
+ cd->u.pipefs.mnt = mntget(rpcmount);
+ cd->u.pipefs.dentry = dir;
+ } else {
sunrpc_destroy_cache_detail(cd);
ret = PTR_ERR(dir);
}
@@ -1802,8 +1805,9 @@ EXPORT_SYMBOL_GPL(sunrpc_cache_register_pipefs);

void sunrpc_cache_unregister_pipefs(struct cache_detail *cd)
{
- rpc_remove_cache_dir(cd->u.pipefs.dir);
- cd->u.pipefs.dir = NULL;
+ rpc_remove_cache_dir(cd->u.pipefs.dentry);
+ cd->u.pipefs.dentry = NULL;
+ mntput(cd->u.pipefs.mnt);
sunrpc_destroy_cache_detail(cd);
}
EXPORT_SYMBOL_GPL(sunrpc_cache_unregister_pipefs);
--
1.7.4

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[PATCH v3, RESEND 07/16] sunrpc: get rpc_pipefs mount point for rpcb_create[_local] from callers [message #42052 is a reply to message #42046] Tue, 08 February 2011 18:41 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
include/linux/sunrpc/clnt.h | 4 ++--
net/sunrpc/rpcb_clnt.c | 22 ++++++++++++----------
net/sunrpc/svc.c | 34 +++++++++++++++++++++-------------
3 files changed, 35 insertions(+), 25 deletions(-)

diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h
index dffaaaa..52f6142 100644
--- a/include/linux/sunrpc/clnt.h
+++ b/include/linux/sunrpc/clnt.h
@@ -135,10 +135,10 @@ void rpc_shutdown_client(struct rpc_clnt *);
void rpc_release_client(struct rpc_clnt *);
void rpc_task_release_client(struct rpc_task *);

-int rpcb_register(u32, u32, int, unsigned short);
+int rpcb_register(u32, u32, int, unsigned short, struct vfsmount *);
int rpcb_v4_register(const u32 program, const u32 version,
const struct sockaddr *address,
- const char *netid);
+ const char *netid, struct vfsmount *rpcmount);
void rpcb_getport_async(struct rpc_task *);

void rpc_call_start(struct rpc_task *);
diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index b059cbe..7fddafa 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -27,7 +27,6 @@
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xprtsock.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>

#ifdef RPC_DEBUG
# define RPCDBG_FACILITY RPCDBG_BIND
@@ -171,7 +170,7 @@ static DEFINE_MUTEX(rpcb_create_local_mutex);
* Returns zero on success, otherwise a negative errno value
* is returned.
*/
-static int rpcb_create_local(void)
+static int rpcb_create_local(struct vfsmount *rpcmount)
{
struct rpc_create_args args = {
.net = &init_net,
@@ -183,7 +182,7 @@ static int rpcb_create_local(void)
.version = RPCBVERS_2,
.authflavor = RPC_AUTH_UNIX,
.flags = RPC_CLNT_CREATE_NOPING,
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = rpcmount,
};
struct rpc_clnt *clnt, *clnt4;
int result = 0;
@@ -225,7 +224,8 @@ out:
}

static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
- size_t salen, int proto, u32 version)
+ size_t salen, int proto, u32 version,
+ struct vfsmount *rpcmount)
{
struct rpc_create_args args = {
.net = &init_net,
@@ -238,7 +238,7 @@ static struct rpc_clnt *rpcb_create(char *hostname, struct sockaddr *srvaddr,
.authflavor = RPC_AUTH_UNIX,
.flags = (RPC_CLNT_CREATE_NOPING |
RPC_CLNT_CREATE_NONPRIVPORT),
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = rpcmount,
};

switch (srvaddr->sa_family) {
@@ -305,7 +305,8 @@ static int rpcb_register_call(struct rpc_clnt *clnt, struct rpc_message *msg)
* IN6ADDR_ANY (ie available for all AF_INET and AF_INET6
* addresses).
*/
-int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
+int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port,
+ struct vfsmount *rpcmount)
{
struct rpcbind_args map = {
.r_prog = prog,
@@ -318,7 +319,7 @@ int rpcb_register(u32 prog, u32 vers, int prot, unsigned short port)
};
int error;

- error = rpcb_create_local();
+ error = rpcb_create_local(rpcmount);
if (error)
return error;

@@ -445,7 +446,8 @@ static int rpcb_unregister_all_protofamilies(struct rpc_message *msg)
* advertises the service on all IPv4 and IPv6 addresses.
*/
int rpcb_v4_register(const u32 program, const u32 version,
- const struct sockaddr *address, const char *netid)
+ const struct sockaddr *address, const char *netid,
+ struct vfsmount *rpcmount)
{
struct rpcbind_args map = {
.r_prog = program,
@@ -458,7 +460,7 @@ int rpcb_v4_register(const u32 program, const u32 version,
};
int error;

- error = rpcb_create_local();
+ error = rpcb_create_local(rpcmount);
if (error)
return error;
if (rpcb_local_clnt4 == NULL)
@@ -594,7 +596,7 @@ void rpcb_getport_async(struct rpc_task *task)
task->tk_pid, __func__, bind_version);

rpcb_clnt = rpcb_create(clnt->cl_server, sap, salen, xprt->prot,
- bind_version);
+ bind_version, clnt->cl_path.mnt);
if (IS_ERR(rpcb_clnt)) {
status = PTR_ERR(rpcb_clnt);
dprintk("RPC: %5u %s: rpcb_create failed, error %ld\n",
diff --git a/net/sunrpc/svc.c b/net/sunrpc/svc.c
index 63abe2b..031f2d4 100644
--- a/net/sunrpc/svc.c
+++ b/net/sunrpc/svc.c
@@ -739,7 +739,8 @@ EXPORT_SYMBOL_GPL(svc_exit_thread);
*/
static int __svc_rpcb_register4(const u32 program, const u32 version,
const unsigned short protocol,
- const unsigned short port)
+ const unsigned short port,
+ struct vfsmount *rpcmount)
{
const struct sockaddr_in sin = {
.sin_family = AF_INET,
@@ -761,14 +762,16 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
}

error = rpcb_v4_register(program, version,
- (const struct sockaddr *)&sin, netid);
+ (const struct sockaddr *)&sin, netid,
+ rpcmount);

/*
* User space didn't support rpcbind v4, so retry this
* registration request with the legacy rpcbind v2 protocol.
*/
if (error == -EPROTONOSUPPORT)
- error = rpcb_register(program, version, protocol, port);
+ error = rpcb_register(program, version, protocol, port,
+ rpcmount);

return error;
}
@@ -786,7 +789,8 @@ static int __svc_rpcb_register4(const u32 program, const u32 version,
*/
static int __svc_rpcb_register6(const u32 program, const u32 version,
const unsigned short protocol,
- const unsigned short port)
+ const unsigned short port,
+ struct vfsmount *rpcmount)
{
const struct sockaddr_in6 sin6 = {
.sin6_family = AF_INET6,
@@ -808,7 +812,8 @@ static int __svc_rpcb_register6(const u32 program, const u32 version,
}

error = rpcb_v4_register(program, version,
- (const struct sockaddr *)&sin6, netid);
+ (const struct sockaddr *)&sin6, netid,
+ rpcmount);

/*
* User space didn't support rpcbind version 4, so we won't
@@ -831,19 +836,20 @@ static int __svc_register(const char *progname,
const u32 program, const u32 version,
const int family,
const unsigned short protocol,
- const unsigned short port)
+ const unsigned short port,
+ struct vfsmount *rpcmount)
{
int error = -EAFNOSUPPORT;

switch (family) {
case PF_INET:
error = __svc_rpcb_register4(program, version,
- protocol, port);
+ protocol, port, rpcmount);
break;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
case PF_INET6:
error = __svc_rpcb_register6(program, version,
- protocol, port);
+ protocol, port, rpcmount);
#endif /* defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE) */
}

@@ -889,7 +895,8 @@ int svc_register(const struct svc_serv *serv, const int family,
continue;

error = __svc_register(progp->pg_name, progp->pg_prog,
- i, family, proto, port);
+ i, family, proto, port,
+ serv->sv_rpcmount);
if (error < 0)
break;
}
@@ -906,18 +913,18 @@ int svc_register(const struct svc_serv *serv, const int family,
* in this case to clear all existing entries for [program, version].
*/
static void __svc_unregister(const u32 program, const u32 version,
- const char *progname)
+ const char *progname, struct vfsmount *rpcmount)
{
int error;

- error = rpcb_v4_register(program, version, NULL, "");
+ error = rpcb_v4_register(program, version, NULL, "", rpcmount);

/*
* User space didn't support rpcbind v4, so retry this
* request with the legacy rpcbind v2 protocol.
*/
if (error == -EPROTONOSUPPORT)
- error = rpcb_register(program, version, 0, 0);
+ error = rpcb_register(program, version, 0, 0, rpcmount);

dprintk("svc: %s(%sv%u), error %d\n",
__func__, progname, version, error);
@@ -946,7 +953,8 @@ static void svc_unregister(const struct svc_serv *serv)
if (progp->pg_vers[i]->vs_hidden)
continue;

- __svc_unregister(progp->pg_prog, i, progp->pg_name);
+ __svc_unregister(progp->pg_prog, i, progp->pg_name,
+ serv->sv_rpcmount);
}
}

--
1.7.4

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...

[PATCH v3, RESEND 12/16] sunrpc: introduce get_rpc_pipefs() [message #42053 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous messageGo to next message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Get rpc_pipefs mount point by path. If path is NULL, we use first
rpc_pipefs from mount table visible from current root directory.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
include/linux/sunrpc/rpc_pipe_fs.h | 1 +
net/sunrpc/rpc_pipe.c | 51 ++++++++++++++++++++++++++++++++++++
2 files changed, 52 insertions(+), 0 deletions(-)

diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index f5216f1..4a8830a 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -46,6 +46,7 @@ RPC_I(struct inode *inode)

extern struct vfsmount *init_rpc_pipefs;

+extern struct vfsmount *get_rpc_pipefs(const char *path);
extern int rpc_pipefs_add_destroy_cb(struct super_block *sb,
void (*destroy_cb)(void *data), void *data);

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 58312fa..1261f27 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -16,6 +16,9 @@
#include <linux/namei.h>
#include <linux/fsnotify.h>
#include <linux/kernel.h>
+#include <linux/nsproxy.h>
+#include <linux/mnt_namespace.h>
+#include <linux/fs_struct.h>

#include <asm/ioctls.h>
#include <linux/fs.h>
@@ -939,6 +942,54 @@ static const struct super_operations s_ops = {

#define RPCAUTH_GSSMAGIC 0x67596969

+static int check_rpc_pipefs(struct vfsmount *mnt, void *arg)
+{
+ struct vfsmount **rpcmount = arg;
+ struct path path = {
+ .mnt = mnt,
+ .dentry = mnt->mnt_root,
+ };
+
+ if (!mnt->mnt_sb)
+ return 0;
+ if (mnt->mnt_sb->s_magic != RPCAUTH_GSSMAGIC)
+ return 0;
+
+ if (!path_is_under(&path, &current->fs->root))
+ return 0;
+
+ *rpcmount = mntget(mnt);
+ return 1;
+}
+
+struct vfsmount *get_rpc_pipefs(const char *p)
+{
+ int error;
+ struct vfsmount *rpcmount = ERR_PTR(-EINVAL);
+ struct path path;
+
+ if (!p) {
+ iterate_mounts(check_rpc_pipefs, &rpcmount,
+ current->nsproxy->mnt_ns->root);
+
+ if (IS_ERR(rpcmount) && (current->nsproxy->mnt_ns ==
+ init_task.nsproxy->mnt_ns))
+ return mntget(init_rpc_pipefs);
+
+ return rpcmount;
+ }
+
+ error = kern_path(p, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
+ if (error)
+ return ERR_PTR(error);
+
+ check_rpc_pipefs(path.mnt, &rpcmount);
+ path_put(&path);
+
+ return rpcmount;
+}
+EXPORT_SYMBOL_GPL(get_rpc_pipefs);
+
struct destroy_cb {
struct list_head list;
void (*callback)(void *data);
--
1.7.4

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[PATCH v3, RESEND 16/16] Rework get_rpc_pipefs() and introduce put_rpc_pipefs() [message #42054 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Now sunrpc module can be removed normally.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfs/client.c | 4 +-
fs/nfs/super.c | 2 +-
fs/nfsd/nfs4callback.c | 2 +-
fs/nfsd/nfssvc.c | 4 +-
include/linux/sunrpc/rpc_pipe_fs.h | 1 +
net/sunrpc/rpc_pipe.c | 51 +++++++++++++++++++++++------------
6 files changed, 40 insertions(+), 24 deletions(-)

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 63e3b54..118952d 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -838,7 +838,7 @@ static int nfs_init_server(struct nfs_server *server,

/* Allocate or find a client reference we can use */
clp = nfs_get_client(&cl_init);
- mntput(cl_init.rpcmount);
+ put_rpc_pipefs(cl_init.rpcmount);
if (IS_ERR(clp)) {
dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
return PTR_ERR(clp);
@@ -1528,7 +1528,7 @@ static int nfs4_init_server(struct nfs_server *server,
&timeparms,
data->minorversion,
rpcmount);
- mntput(rpcmount);
+ put_rpc_pipefs(rpcmount);
if (error < 0)
goto error;

diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index be4852b..148843e 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1668,7 +1668,7 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
* to a file handle.
*/
status = nfs_mount(&request);
- mntput(request.rpcmount);
+ put_rpc_pipefs(request.rpcmount);
if (status != 0) {
dfprintk(MOUNT, "NFS: unable to mount server %s, error %d\n",
request.hostname, status);
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 3048988..8c2ba1a 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -670,7 +670,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
return PTR_ERR(args.rpcmount);
/* Create RPC client */
client = rpc_create(&args);
- mntput(args.rpcmount);
+ put_rpc_pipefs(args.rpcmount);
if (IS_ERR(client)) {
dprintk("NFSD: couldn't create callback client: %ld\n",
PTR_ERR(client));
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index a10b1439..7d03e37 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -227,7 +227,7 @@ static int nfsd_startup(unsigned short port, int nrservs)
goto out_racache;
}
ret = lockd_up(rpcmount);
- mntput(rpcmount);
+ put_rpc_pipefs(rpcmount);
if (ret)
goto out_racache;
ret = nfs4_state_start();
@@ -346,7 +346,7 @@ int nfsd_create_serv(void)
nfsd_serv = svc_create_pooled(&nfsd_program, rpcmount,
nfsd_max_blksize, nfsd_last_thread, nfsd,
THIS_MODULE);
- mntput(rpcmount);
+ put_rpc_pipefs(rpcmount);
if (nfsd_serv == NULL)
return -ENOMEM;

diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index a0b9c46..328b3da 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -45,6 +45,7 @@ RPC_I(struct inode *inode)
}

extern struct vfsmount *get_rpc_pipefs(const char *path);
+extern void put_rpc_pipefs(struct vfsmount *rpcmount);
extern int rpc_pipefs_add_destroy_cb(struct super_block *sb,
void (*destroy_cb)(void *data), void *data);

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 7c16261..55ef327 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -33,6 +33,7 @@
#include <linux/sunrpc/cache.h>

struct vfsmount *init_rpc_pipefs __read_mostly;
+static int init_rpc_pipefs_count;

static struct file_system_type rpc_pipe_fs_type;

@@ -1005,22 +1006,35 @@ static int check_rpc_pipefs(struct vfsmount *mnt, void *arg)
return 1;
}

-struct vfsmount *get_rpc_pipefs(const char *p)
+static struct vfsmount *find_rpc_pipefs(void)
{
- int error;
struct vfsmount *rpcmount = ERR_PTR(-EINVAL);
- struct path path;
+ int err;

- if (!p) {
- iterate_mounts(check_rpc_pipefs, &rpcmount,
- current->nsproxy->mnt_ns->root);
+ iterate_mounts(check_rpc_pipefs, &rpcmount,
+ current->nsproxy->mnt_ns->root);

- if (IS_ERR(rpcmount) && (current->nsproxy->mnt_ns ==
- init_task.nsproxy->mnt_ns))
- return mntget(init_rpc_pipefs);
+ if (!IS_ERR(rpcmount))
+ return rpcmount;

+ if (current->nsproxy->mnt_ns != init_task.nsproxy->mnt_ns)
return rpcmount;
- }
+
+ err = simple_pin_fs(&rpc_pipe_fs_type, &init_rpc_pipefs,
+ &init_rpc_pipefs_count);
+ if (err)
+ return ERR_PTR(err);
+ return init_rpc_pipefs;
+}
+
+struct vfsmount *get_rpc_pipefs(const char *p)
+{
+ int error;
+ struct vfsmount *rpcmount = ERR_PTR(-EINVAL);
+ struct path path;
+
+ if (!p)
+ return find_rpc_pipefs();

error = kern_path(p, LOOKUP_FOLLOW | LOOKUP_DIRECTORY, &path);
if (error)
@@ -1033,6 +1047,15 @@ struct vfsmount *get_rpc_pipefs(const char *p)
}
EXPORT_SYMBOL_GPL(get_rpc_pipefs);

+void put_rpc_pipefs(struct vfsmount *rpcmount)
+{
+ if (rpcmount == init_rpc_pipefs)
+ simple_release_fs(&init_rpc_pipefs, &init_rpc_pipefs_count);
+ else
+ mntput(rpcmount);
+}
+EXPORT_SYMBOL_GPL(put_rpc_pipefs);
+
struct destroy_cb {
struct list_head list;
void (*callback)(void *data);
@@ -1232,16 +1255,8 @@ int register_rpc_pipefs(void)
if (err)
goto destroy_cache;

- init_rpc_pipefs = kern_mount(&rpc_pipe_fs_type);
- if (IS_ERR(init_rpc_pipefs)) {
- err = PTR_ERR(init_rpc_pipefs);
- goto unregister_fs;
- }
-
return 0;

-unregister_fs:
- unregister_filesystem(&rpc_pipe_fs_type);
destroy_cache:
kmem_cache_destroy(rpc_inode_cachep);
return err;
--
1.7.4

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[PATCH v3, RESEND 10/16] nfs: per-rpc_pipefs dns cache [message #42055 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Lazy initialization of dns cache: on first call nfs_dns_resolve_name().
Every rpc_pipefs has separate dns cache now.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfs/cache_lib.c | 17 ++-----
fs/nfs/cache_lib.h | 3 +-
fs/nfs/dns_resolve.c | 137 +++++++++++++++++++++++++++++++++++++-----------
fs/nfs/dns_resolve.h | 15 +-----
fs/nfs/inode.c | 9 +---
fs/nfs/nfs4namespace.c | 4 +-
6 files changed, 117 insertions(+), 68 deletions(-)

diff --git a/fs/nfs/cache_lib.c b/fs/nfs/cache_lib.c
index 0944d4e..9b99d9e 100644
--- a/fs/nfs/cache_lib.c
+++ b/fs/nfs/cache_lib.c
@@ -12,7 +12,6 @@
#include <linux/namei.h>
#include <linux/slab.h>
#include <linux/sunrpc/cache.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>

#include "cache_lib.h"

@@ -111,25 +110,17 @@ int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq)
return 0;
}

-int nfs_cache_register(struct cache_detail *cd)
+int nfs_cache_register(struct cache_detail *cd, struct vfsmount *rpcmount)
{
struct nameidata nd;
- struct vfsmount *mnt;
int ret;

- mnt = mntget(init_rpc_pipefs);
- if (IS_ERR(mnt))
- return PTR_ERR(mnt);
- ret = vfs_path_lookup(mnt->mnt_root, mnt, "/cache", 0, &nd);
+ ret = vfs_path_lookup(rpcmount->mnt_root, rpcmount, "/cache", 0, &nd);
if (ret)
- goto err;
- ret = sunrpc_cache_register_pipefs(mnt, nd.path.dentry,
+ return ret;
+ ret = sunrpc_cache_register_pipefs(rpcmount, nd.path.dentry,
cd->name, 0600, cd);
path_put(&nd.path);
- if (!ret)
- return ret;
-err:
- mntput(mnt);
return ret;
}

diff --git a/fs/nfs/cache_lib.h b/fs/nfs/cache_lib.h
index 76f856e..1d4a0a5 100644
--- a/fs/nfs/cache_lib.h
+++ b/fs/nfs/cache_lib.h
@@ -23,5 +23,6 @@ extern struct nfs_cache_defer_req *nfs_cache_defer_req_alloc(void);
extern void nfs_cache_defer_req_put(struct nfs_cache_defer_req *dreq);
extern int nfs_cache_wait_for_upcall(struct nfs_cache_defer_req *dreq);

-extern int nfs_cache_register(struct cache_detail *cd);
+extern int nfs_cache_register(struct cache_detail *cd,
+ struct vfsmount *rpcmount);
extern void nfs_cache_unregister(struct cache_detail *cd);
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index a6e711a..a832e64 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -12,7 +12,7 @@
#include <linux/dns_resolver.h>

ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
- struct sockaddr *sa, size_t salen)
+ struct sockaddr *sa, size_t salen, struct vfsmount *rpcmount)
{
ssize_t ret;
char *ip_addr = NULL;
@@ -37,9 +37,11 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
#include <linux/socket.h>
#include <linux/seq_file.h>
#include <linux/inet.h>
+#include <linux/mount.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/cache.h>
#include <linux/sunrpc/svcauth.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>

#include "dns_resolve.h"
#include "cache_lib.h"
@@ -47,7 +49,13 @@ ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
#define NFS_DNS_HASHBITS 4
#define NFS_DNS_HASHTBL_SIZE (1 << NFS_DNS_HASHBITS)

-static struct cache_head *nfs_dns_table[NFS_DNS_HASHTBL_SIZE];
+static DEFINE_SPINLOCK(nfs_dns_resolve_lock);
+static LIST_HEAD(nfs_dns_resolve_list);
+
+struct nfs_dns_resolve_list {
+ struct list_head list;
+ struct cache_detail *cd;
+};

struct nfs_dns_ent {
struct cache_head h;
@@ -259,21 +267,6 @@ out:
return ret;
}

-static struct cache_detail nfs_dns_resolve = {
- .owner = THIS_MODULE,
- .hash_size = NFS_DNS_HASHTBL_SIZE,
- .hash_table = nfs_dns_table,
- .name = "dns_resolve",
- .cache_put = nfs_dns_ent_put,
- .cache_upcall = nfs_dns_upcall,
- .cache_parse = nfs_dns_parse,
- .cache_show = nfs_dns_show,
- .match = nfs_dns_match,
- .init = nfs_dns_ent_init,
- .update = nfs_dns_ent_update,
- .alloc = nfs_dns_ent_alloc,
-};
-
static int do_cache_lookup(struct cache_detail *cd,
struct nfs_dns_ent *key,
struct nfs_dns_ent **item,
@@ -336,37 +329,119 @@ out:
return ret;
}

+static struct cache_detail *nfs_alloc_dns_resolve(void)
+{
+ struct cache_detail *dns_resolve;
+ struct cache_head **hash_table;
+
+ dns_resolve = kmalloc(sizeof(*dns_resolve), GFP_KERNEL);
+ if (!dns_resolve)
+ return NULL;
+
+ hash_table = kmalloc(sizeof(*hash_table) * NFS_DNS_HASHTBL_SIZE,
+ GFP_KERNEL);
+ if (!hash_table) {
+ kfree(dns_resolve);
+ return NULL;
+ }
+
+ dns_resolve->owner = THIS_MODULE;
+ dns_resolve->hash_size = NFS_DNS_HASHTBL_SIZE;
+ dns_resolve->hash_table = hash_table;
+ dns_resolve->name = "dns_resolve";
+ dns_resolve->cache_put = nfs_dns_ent_put;
+ dns_resolve->cache_upcall = nfs_dns_upcall;
+ dns_resolve->cache_parse = nfs_dns_parse;
+ dns_resolve->cache_show = nfs_dns_show;
+ dns_resolve->match = nfs_dns_match;
+ dns_resolve->init = nfs_dns_ent_init;
+ dns_resolve->update = nfs_dns_ent_update;
+ dns_resolve->alloc = nfs_dns_ent_alloc;
+
+ return dns_resolve;
+}
+
+static void nfs_free_dns_resolve(struct cache_detail *dns_resolve)
+{
+ kfree(dns_resolve->hash_table);
+ kfree(dns_resolve);
+}
+
+static struct cache_detail *nfs_get_dns_resolve(struct vfsmount *rpcmount)
+{
+ struct nfs_dns_resolve_list *dns_resolve;
+ int error = 0;
+
+ spin_lock(&nfs_dns_resolve_lock);
+ list_for_each_entry(dns_resolve, &nfs_dns_resolve_list, list) {
+ if (dns_resolve->cd->u.pipefs.mnt->mnt_sb != rpcmount->mnt_sb)
+ continue;
+
+ spin_unlock(&nfs_dns_resolve_lock);
+ return dns_resolve->cd;
+ }
+
+ dns_resolve = kmalloc(sizeof(*dns_resolve), GFP_KERNEL);
+ if (dns_resolve)
+ dns_resolve->cd = nfs_alloc_dns_resolve();
+ if (!dns_resolve || !dns_resolve->cd) {
+ error = -ENOMEM;
+ goto err;
+ }
+
+ error = nfs_cache_register(dns_resolve->cd, rpcmount);
+ if (error)
+ goto err;
+
+ INIT_LIST_HEAD(&dns_resolve->list);
+ list_add(&dns_resolve->list, &nfs_dns_resolve_list);
+ spin_unlock(&nfs_dns_resolve_lock);
+
+ return dns_resolve->cd;
+err:
+ spin_unlock(&nfs_dns_resolve_lock);
+ if (dns_resolve)
+ kfree(dns_resolve->cd);
+ kfree(dns_resolve);
+ return dns_resolve->cd;
+}
+
+static void nfs_dns_resolver_destroy(void *data)
+{
+ struct nfs_dns_resolve_list *dns_resolve = data;
+
+ spin_lock(&nfs_dns_resolve_lock);
+ nfs_cache_unregister(dns_resolve->cd);
+ nfs_free_dns_resolve(dns_resolve->cd);
+ list_del(&dns_resolve->list);
+ kfree(dns_resolve);
+ spin_unlock(&nfs_dns_resolve_lock);
+}
+
ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
- struct sockaddr *sa, size_t salen)
+ struct sockaddr *sa, size_t salen, struct vfsmount *rpcmount)
{
struct nfs_dns_ent key = {
.hostname = name,
.namelen = namelen,
};
+ struct cache_detail *dns_resolve;
struct nfs_dns_ent *item = NULL;
ssize_t ret;

- ret = do_cache_lookup_wait(&nfs_dns_resolve, &key, &item);
+ dns_resolve = nfs_get_dns_resolve(rpcmount);
+ ret = do_cache_lookup_wait(dns_resolve, &key, &item);
if (ret == 0) {
if (salen >= item->addrlen) {
memcpy(sa, &item->addr, item->addrlen);
ret = item->addrlen;
} else
ret = -EOVERFLOW;
- cache_put(&item->h, &nfs_dns_resolve);
+ cache_put(&item->h, dns_resolve);
+ rpc_pipefs_add_destroy_cb(rpcmount->mnt_sb,
+ nfs_dns_resolver_destroy, dns_resolve);
} else if (ret == -ENOENT)
ret = -ESRCH;
return ret;
}
-
-int nfs_dns_resolver_init(void)
-{
- return nfs_cache_register(&nfs_dns_resolve);
-}
-
-void nfs_dns_resolver_destroy(void)
-{
- nfs_cache_unregister(&nfs_dns_resolve);
-}
-
#endif
diff --git a/fs/nfs/dns_resolve.h b/fs/nfs/dns_resolve.h
index 199bb55..74ade60 100644
--- a/fs/nfs/dns_resolve.h
+++ b/fs/nfs/dns_resolve.h
@@ -7,20 +7,7 @@
#define NFS_DNS_HOSTNAME_MAXLEN (128)


-#ifdef CONFIG_NFS_USE_KERNEL_DNS
-static inline int nfs_dns_resolver_init(void)
-{
- return 0;
-}
-
-static inline void nfs_dns_resolver_destroy(void)
-{}
-#else
-extern int nfs_dns_resolver_init(void);
-extern void nfs_dns_resolver_destroy(void);
-#endif
-
extern ssize_t nfs_dns_resolve_name(char *name, size_t namelen,
- struct sockaddr *sa, size_t salen);
+ struct sockaddr *sa, size_t salen, struct vfsmount *rpcmount);

#endif
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 1cc600e..1c3be51 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1543,10 +1543,6 @@ static int __init init_nfs_fs(void)

err = nfs_idmap_init();
if (err < 0)
- goto out9;
-
- err = nfs_dns_resolver_init();
- if (err < 0)
goto out8;

err = nfs_fscache_register();
@@ -1607,10 +1603,8 @@ out5:
out6:
nfs_fscache_unregister();
out7:
- nfs_dns_resolver_destroy();
-out8:
nfs_idmap_quit();
-out9:
+out8:
return err;
}

@@ -1622,7 +1616,6 @@ static void __exit exit_nfs_fs(void)
nfs_destroy_inodecache();
nfs_destroy_nfspagecache();
nfs_fscache_unregister();
- nfs_dns_resolver_destroy();
nfs_idmap_quit();
#ifdef CONFIG_PROC_FS
rpc_proc_unregister("nfs");
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 3c2a172..7a61fdb 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -14,6 +14,7 @@
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/sunrpc/clnt.h>
+#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/vfs.h>
#include <linux/inet.h>
#include "internal.h"
@@ -104,7 +105,8 @@ static size_t nfs_parse_server_name(char *string, size_t len,

ret = rpc_pton(string, len, sa, salen);
if (ret == 0) {
- ret = nfs_dns_resolve_name(string, len, sa, salen);
+ ret = nfs_dns_resolve_name(string, len, sa, salen,
+ init_rpc_pipefs);
if (ret < 0)
ret = 0;
}
--
1.7.4

_____________________________________
...

[PATCH v3, RESEND 14/16] sunrpc: make rpc_pipefs be mountable multiple times [message #42056 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
To support containers, allow multiple independent instances of
rpc_pipefs. Use '-o newinstance' to create new of the filesystem.
The same semantics as with devpts.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
net/sunrpc/rpc_pipe.c | 80 ++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 79 insertions(+), 1 deletions(-)

diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 1261f27..f824f33 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -19,6 +19,7 @@
#include <linux/nsproxy.h>
#include <linux/mnt_namespace.h>
#include <linux/fs_struct.h>
+#include <linux/parser.h>

#include <asm/ioctls.h>
#include <linux/fs.h>
@@ -41,6 +42,49 @@ static struct kmem_cache *rpc_inode_cachep __read_mostly;

#define RPC_UPCALL_TIMEOUT (30*HZ)

+struct rpc_mount_opts {
+ int newinstance;
+};
+
+enum {
+ Opt_newinstance,
+
+ Opt_err
+};
+
+static const match_table_t tokens = {
+ {Opt_newinstance, "newinstance"},
+
+ {Opt_err, NULL}
+};
+
+static int
+parse_mount_options(char *data, struct rpc_mount_opts *opts)
+{
+ char *p;
+
+ opts->newinstance = 0;
+
+ while ((p = strsep(&data, ",")) != NULL) {
+ substring_t args[MAX_OPT_ARGS];
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_newinstance:
+ opts->newinstance = 1;
+ break;
+ default:
+ return -EINVAL;
+ }
+ }
+
+ return 0;
+}
+
static void rpc_purge_list(struct rpc_inode *rpci, struct list_head *head,
void (*destroy_msg)(struct rpc_pipe_msg *), int err)
{
@@ -1093,11 +1137,45 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
return 0;
}

+static int
+compare_rpc_mnt_sb(struct super_block *s, void *p)
+{
+ if (init_rpc_pipefs)
+ return init_rpc_pipefs->mnt_sb == s;
+ return 0;
+}
+
static struct dentry *
rpc_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
- return mount_single(fs_type, flags, data, rpc_fill_super);
+ int error;
+ struct rpc_mount_opts opts;
+ struct super_block *s;
+
+ error = parse_mount_options(data, &opts);
+ if (error)
+ return ERR_PTR(error);
+
+ if (opts.newinstance)
+ s = sget(fs_type, NULL, set_anon_super, NULL);
+ else
+ s = sget(fs_type, compare_rpc_mnt_sb, set_anon_super, NULL);
+
+ if (IS_ERR(s))
+ return ERR_CAST(s);
+
+ if (!s->s_root) {
+ s->s_flags = flags;
+ error = rpc_fill_super(s, data, flags & MS_SILENT ? 1 : 0);
+ if (error) {
+ deactivate_locked_super(s);
+ return ERR_PTR(error);
+ }
+ s->s_flags |= MS_ACTIVE;
+ }
+
+ return dget(s->s_root);
}

static void rpc_kill_sb(struct super_block *sb)
--
1.7.4

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[PATCH v3, RESEND 11/16] Export iterate_mounts symbol to be able to use from sunrpc module. [message #42057 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/namespace.c | 1 +
1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/fs/namespace.c b/fs/namespace.c
index 7b0b953..c7f9a19 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1465,6 +1465,7 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
}
return 0;
}
+EXPORT_SYMBOL_GPL(iterate_mounts);

static void cleanup_group_ids(struct vfsmount *mnt, struct vfsmount *end)
{
--
1.7.4

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[PATCH v3, RESEND 15/16] sunrpc: remove global init_rpc_pipefs [message #42058 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Replace remaining init_rpc_pipefs references with get_rpc_pipefs(NULL)
and make init_rpc_pipefs static.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfsd/nfs4callback.c | 5 ++++-
fs/nfsd/nfssvc.c | 16 ++++++++++++++--
include/linux/sunrpc/rpc_pipe_fs.h | 2 --
net/sunrpc/rpc_pipe.c | 1 -
4 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 6636ab2..3048988 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -646,7 +646,6 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
.version = 0,
.authflavor = clp->cl_flavor,
.flags = (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
- .rpcmount = init_rpc_pipefs,
};
struct rpc_clnt *client;

@@ -666,8 +665,12 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
args.prognumber = clp->cl_cb_session->se_cb_prog;
args.protocol = XPRT_TRANSPORT_BC_TCP;
}
+ args.rpcmount = get_rpc_pipefs(NULL);
+ if (IS_ERR(args.rpcmount))
+ return PTR_ERR(args.rpcmount);
/* Create RPC client */
client = rpc_create(&args);
+ mntput(args.rpcmount);
if (IS_ERR(client)) {
dprintk("NFSD: couldn't create callback client: %ld\n",
PTR_ERR(client));
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index dc11012..a10b1439 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -206,6 +206,7 @@ static bool nfsd_up = false;
static int nfsd_startup(unsigned short port, int nrservs)
{
int ret;
+ struct vfsmount *rpcmount;

if (nfsd_up)
return 0;
@@ -220,7 +221,13 @@ static int nfsd_startup(unsigned short port, int nrservs)
ret = nfsd_init_socks(port);
if (ret)
goto out_racache;
- ret = lockd_up(init_rpc_pipefs);
+ rpcmount = get_rpc_pipefs(NULL);
+ if (IS_ERR(rpcmount)) {
+ ret = PTR_ERR(rpcmount);
+ goto out_racache;
+ }
+ ret = lockd_up(rpcmount);
+ mntput(rpcmount);
if (ret)
goto out_racache;
ret = nfs4_state_start();
@@ -308,6 +315,7 @@ static void set_max_drc(void)
int nfsd_create_serv(void)
{
int err = 0;
+ struct vfsmount *rpcmount;

WARN_ON(!mutex_is_locked(&nfsd_mutex));
if (nfsd_serv) {
@@ -332,9 +340,13 @@ int nfsd_create_serv(void)
}
nfsd_reset_versions();

- nfsd_serv = svc_create_pooled(&nfsd_program, init_rpc_pipefs,
+ rpcmount = get_rpc_pipefs(NULL);
+ if (IS_ERR(rpcmount))
+ return PTR_ERR(rpcmount);
+ nfsd_serv = svc_create_pooled(&nfsd_program, rpcmount,
nfsd_max_blksize, nfsd_last_thread, nfsd,
THIS_MODULE);
+ mntput(rpcmount);
if (nfsd_serv == NULL)
return -ENOMEM;

diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index 4a8830a..a0b9c46 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -44,8 +44,6 @@ RPC_I(struct inode *inode)
return container_of(inode, struct rpc_inode, vfs_inode);
}

-extern struct vfsmount *init_rpc_pipefs;
-
extern struct vfsmount *get_rpc_pipefs(const char *path);
extern int rpc_pipefs_add_destroy_cb(struct super_block *sb,
void (*destroy_cb)(void *data), void *data);
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index f824f33..7c16261 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -33,7 +33,6 @@
#include <linux/sunrpc/cache.h>

struct vfsmount *init_rpc_pipefs __read_mostly;
-EXPORT_SYMBOL_GPL(init_rpc_pipefs);

static struct file_system_type rpc_pipe_fs_type;

--
1.7.4

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[PATCH v3, RESEND 13/16] nfs: introduce mount option 'rpcmount' [message #42059 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
It specifies rpc_pipefs to use. /var/lib/nfs/rpc_pipefs, by default.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
fs/nfs/callback.c | 5 ++-
fs/nfs/callback.h | 3 +-
fs/nfs/client.c | 46 ++++++++++++++++++++++++++++++++++++--------
fs/nfs/internal.h | 10 +++++++-
fs/nfs/mount_clnt.c | 3 +-
fs/nfs/namespace.c | 3 +-
fs/nfs/nfs4namespace.c | 22 +++++++++++---------
fs/nfs/super.c | 20 +++++++++++++++++++
include/linux/nfs_fs_sb.h | 1 +
9 files changed, 86 insertions(+), 27 deletions(-)

diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index c9b98ad..d56f402 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -245,7 +245,8 @@ static inline void nfs_callback_bc_serv(u32 minorversion, struct rpc_xprt *xprt,
/*
* Bring up the callback thread if it is not already up.
*/
-int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
+int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt,
+ struct vfsmount *rpcmount)
{
struct svc_serv *serv = NULL;
struct svc_rqst *rqstp;
@@ -260,7 +261,7 @@ int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt)
nfs_callback_bc_serv(minorversion, xprt, cb_info);
goto out;
}
- serv = svc_create(&nfs4_callback_program, init_rpc_pipefs,
+ serv = svc_create(&nfs4_callback_program, rpcmount,
NFS4_CALLBACK_BUFSIZE, NULL);
if (!serv) {
ret = -ENOMEM;
diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
index 46d93ce..0ea5d1e 100644
--- a/fs/nfs/callback.h
+++ b/fs/nfs/callback.h
@@ -175,7 +175,8 @@ extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args,
extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy,
struct cb_process_state *cps);
#ifdef CONFIG_NFS_V4
-extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt);
+extern int nfs_callback_up(u32 minorversion, struct rpc_xprt *xprt,
+ struct vfsmount *rpcmount);
extern void nfs_callback_down(int minorversion);
extern int nfs4_validate_delegation_stateid(struct nfs_delegation *delegation,
const nfs4_stateid *stateid);
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 79c01f8..63e3b54 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -131,6 +131,7 @@ struct nfs_client_initdata {
const struct nfs_rpc_ops *rpc_ops;
int proto;
u32 minorversion;
+ struct vfsmount *rpcmount;
};

/*
@@ -167,6 +168,7 @@ static struct nfs_client *nfs_alloc_client(const struct nfs_client_initdata *cl_
clp->cl_rpcclient = ERR_PTR(-EINVAL);

clp->cl_proto = cl_init->proto;
+ clp->cl_rpcmount = mntget(cl_init->rpcmount);

#ifdef CONFIG_NFS_V4
err = nfs_get_cb_ident_idr(clp, cl_init->minorversion);
@@ -286,6 +288,7 @@ static void nfs_free_client(struct nfs_client *clp)
if (clp->cl_machine_cred != NULL)
put_rpccred(clp->cl_machine_cred);

+ mntput(clp->cl_rpcmount);
kfree(clp->cl_hostname);
kfree(clp);

@@ -471,6 +474,9 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
/* Match the full socket address */
if (!nfs_sockaddr_cmp(sap, clap))
continue;
+ /* Match rpc_pipefs mount point */
+ if (clp->cl_rpcmount->mnt_sb != data->rpcmount->mnt_sb)
+ continue;

atomic_inc(&clp->cl_count);
return clp;
@@ -629,7 +635,7 @@ static int nfs_create_rpc_client(struct nfs_client *clp,
.program = &nfs_program,
.version = clp->rpc_ops->version,
.authflavor = flavor,
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = clp->cl_rpcmount,
};

if (discrtry)
@@ -664,7 +670,7 @@ static void nfs_destroy_server(struct nfs_server *server)
/*
* Version 2 or 3 lockd setup
*/
-static int nfs_start_lockd(struct nfs_server *server)
+static int nfs_start_lockd(struct nfs_server *server, struct vfsmount *rpcmount)
{
struct nlm_host *host;
struct nfs_client *clp = server->nfs_client;
@@ -675,7 +681,7 @@ static int nfs_start_lockd(struct nfs_server *server)
.nfs_version = clp->rpc_ops->version,
.noresvport = server->flags & NFS_MOUNT_NORESVPORT ?
1 : 0,
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = rpcmount,
};

if (nlm_init.nfs_version > 3)
@@ -823,8 +829,16 @@ static int nfs_init_server(struct nfs_server *server,
cl_init.rpc_ops = &nfs_v3_clientops;
#endif

+ cl_init.rpcmount = get_rpc_pipefs(data->rpcmount);
+ if (IS_ERR(cl_init.rpcmount)) {
+ dprintk("<-- nfs_init_server() = error %ld\n",
+ PTR_ERR(cl_init.rpcmount));
+ return PTR_ERR(cl_init.rpcmount);
+ }
+
/* Allocate or find a client reference we can use */
clp = nfs_get_client(&cl_init);
+ mntput(cl_init.rpcmount);
if (IS_ERR(clp)) {
dprintk("<-- nfs_init_server() = error %ld\n", PTR_ERR(clp));
return PTR_ERR(clp);
@@ -856,7 +870,7 @@ static int nfs_init_server(struct nfs_server *server,
server->acdirmax = data->acdirmax * HZ;

/* Start lockd here, before we might error out */
- error = nfs_start_lockd(server);
+ error = nfs_start_lockd(server, clp->cl_rpcmount);
if (error < 0)
goto error;

@@ -1265,7 +1279,8 @@ static int nfs4_init_callback(struct nfs_client *clp)
}

error = nfs_callback_up(clp->cl_mvops->minor_version,
- clp->cl_rpcclient->cl_xprt);
+ clp->cl_rpcclient->cl_xprt,
+ clp->cl_rpcmount);
if (error < 0) {
dprintk("%s: failed to start callback. Error = %d\n",
__func__, error);
@@ -1365,7 +1380,8 @@ static int nfs4_set_client(struct nfs_server *server,
const char *ip_addr,
rpc_authflavor_t authflavour,
int proto, const struct rpc_timeout *timeparms,
- u32 minorversion)
+ u32 minorversion,
+ struct vfsmount *rpcmount)
{
struct nfs_client_initdata cl_init = {
.hostname = hostname,
@@ -1374,6 +1390,7 @@ static int nfs4_set_client(struct nfs_server *server,
.rpc_ops = &nfs_v4_clientops,
.proto = proto,
.minorversion = minorversion,
+ .rpcmount = rpcmount,
};
struct nfs_client *clp;
int error;
@@ -1480,6 +1497,7 @@ static int nfs4_init_server(struct nfs_server *server,
const struct nfs_parsed_mount_data *data)
{
struct rpc_timeout timeparms;
+ struct vfsmount *rpcmount;
int error;

dprintk("--> nfs4_init_server()\n");
@@ -1494,6 +1512,11 @@ static int nfs4_init_server(struct nfs_server *server,
server->caps |= NFS_CAP_READDIRPLUS;
server->options = data->options;

+ rpcmount = get_rpc_pipefs(data->rpcmount);
+ if (IS_ERR(rpcmount)) {
+ error = PTR_ERR(rpcmount);
+ goto error;
+ }
/* Get a client record */
error = nfs4_set_client(server,
data->nfs_server.hostname,
@@ -1503,7 +1526,9 @@ static int nfs4_init_server(struct nfs_server *server,
data->auth_flavors[0],
data->nfs_server.protocol,
&timeparms,
- data->minorversion);
+ data->minorversion,
+ rpcmount);
+ mntput(rpcmount);
if (error < 0)
goto error;

@@ -1593,7 +1618,10 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
data->authflavor,
parent_server->client->cl_xprt->prot,
parent_server->client->cl_timeout,
- parent_client->cl_mvops->minor_version);
+ parent_client->cl_mvops->minor_version,
+ parent_client->cl_rpcmount);
+
+
if (error < 0)
goto error;

@@ -1667,7 +1695,7 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
(unsigned long long) server->fsid.major,
(unsigned long long) server->fsid.minor);

- error = nfs_start_lockd(server);
+ error = nfs_start_lockd(server, server->nfs_client->cl_rpcmount);
if (error < 0)
goto out_free_server;

diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index cf9fdbd..868acb2 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -86,6 +86,7 @@ struct nfs_parsed_mount_data {
unsigned int version;
unsigned int minorversion;
char *fscache_uniq;
+ char *rpcmount;

struct {
struct sockaddr_storage address;
@@ -120,6 +121,7 @@ struct nfs_mount_request {
int noresvport;
unsigned int *auth_flav_len;
rpc_authflavor_t *auth_flavs;
+ struct vfsmount *rpcmount;
};

extern int nfs_mount(struct nfs_mount_request *info);
@@ -163,10 +165,14 @@ static inline void nfs_fs_proc_exit(void)

/* nfs4namespace.c */
#ifdef CONFIG_NFS_V4
-extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry);
+extern struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent,
+ struct dentry *dentry,
+ struct vfsmount *rpcmount);
#else
static inline
-struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent, struct dentry *dentry)
+struct vfsmount *nfs_do_refmount(const struct vfsmount *mnt_parent,
+ struct dentry *dentry,
+ struct vfsmount *rpcmount)
{
return ERR_PTR(-ENOENT);
}
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index 6227875..205cc02 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -13,7 +13,6 @@
#include <linux/in.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/sched.h>
-#include <linux/sunrpc/rpc_pipe_fs.h>
#include <linux/nfs_fs.h>
#include "internal.h"

@@ -162,7 +161,7 @@ int nfs_mount(struct nfs_mount_request *info)
.program = &mnt_program,
.version = info->version,
.authflavor = RPC_AUTH_UNIX,
- .rpcmount = init_rpc_pipefs,
+ .rpcmount = info->rpcmount,
};
struct rpc_clnt *mnt_clnt;
int status;
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index f32b860..2a2899b 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -143,7 +143,8 @@ struct vfsmount *nfs_d_automount(struct path *path)
}

if (fattr->valid & NFS_ATTR_FATTR_V4_REFERRAL)
- mnt = nfs_do_refmount(path->mnt, path->dentry);
+ mnt = nfs_do_refmount(path->mnt, path-&g
...

[PATCH v3, RESEND 09/16] sunrpc: introduce rpc_pipefs_add_destroy_cb() [message #42060 is a reply to message #42046] Tue, 08 February 2011 18:42 Go to previous message
Kirill A. Shutemov is currently offline  Kirill A. Shutemov
Messages: 37
Registered: January 2011
Member
From: *parallels.com
Add facility to do some action on destroying of rpc_pipefs superblock.

Signed-off-by: Kirill A. Shutemov <kas@openvz.org>
Reviewed-by: Rob Landley <rlandley@parallels.com>
---
include/linux/sunrpc/rpc_pipe_fs.h | 3 ++
net/sunrpc/rpc_pipe.c | 51 ++++++++++++++++++++++++++++++++++-
2 files changed, 52 insertions(+), 2 deletions(-)

diff --git a/include/linux/sunrpc/rpc_pipe_fs.h b/include/linux/sunrpc/rpc_pipe_fs.h
index b09bfa5..f5216f1 100644
--- a/include/linux/sunrpc/rpc_pipe_fs.h
+++ b/include/linux/sunrpc/rpc_pipe_fs.h
@@ -46,6 +46,9 @@ RPC_I(struct inode *inode)

extern struct vfsmount *init_rpc_pipefs;

+extern int rpc_pipefs_add_destroy_cb(struct super_block *sb,
+ void (*destroy_cb)(void *data), void *data);
+
extern int rpc_queue_upcall(struct inode *, struct rpc_pipe_msg *);

struct rpc_clnt;
diff --git a/net/sunrpc/rpc_pipe.c b/net/sunrpc/rpc_pipe.c
index 484c9a3..58312fa 100644
--- a/net/sunrpc/rpc_pipe.c
+++ b/net/sunrpc/rpc_pipe.c
@@ -939,6 +939,31 @@ static const struct super_operations s_ops = {

#define RPCAUTH_GSSMAGIC 0x67596969

+struct destroy_cb {
+ struct list_head list;
+ void (*callback)(void *data);
+ void *data;
+};
+
+int rpc_pipefs_add_destroy_cb(struct super_block *sb,
+ void (*destroy_cb)(void *data), void *data)
+{
+ struct destroy_cb *dcb;
+ struct list_head *destroy_cb_list = sb->s_fs_info;
+
+ dcb = kmalloc(sizeof(*dcb), GFP_KERNEL);
+ if (!dcb)
+ return -ENOMEM;
+
+ dcb->callback = destroy_cb;
+ dcb->data = data;
+ INIT_LIST_HEAD(&dcb->list);
+ list_add(&dcb->list, destroy_cb_list);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rpc_pipefs_add_destroy_cb);
+
/*
* We have a single directory with 1 node in it.
*/
@@ -1004,8 +1029,16 @@ rpc_fill_super(struct super_block *sb, void *data, int silent)
iput(inode);
return -ENOMEM;
}
- if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL))
+ /* List of destroy callbacks */
+ sb->s_fs_info = kmalloc(sizeof(struct list_head), GFP_KERNEL);
+ if (!sb->s_fs_info)
+ return -ENOMEM;
+ INIT_LIST_HEAD((struct list_head*) sb->s_fs_info);
+ if (rpc_populate(root, files, RPCAUTH_lockd, RPCAUTH_RootEOF, NULL)) {
+ kfree(sb->s_fs_info);
return -ENOMEM;
+ }
+
return 0;
}

@@ -1016,11 +1049,25 @@ rpc_mount(struct file_system_type *fs_type,
return mount_single(fs_type, flags, data, rpc_fill_super);
}

+static void rpc_kill_sb(struct super_block *sb)
+{
+ struct list_head *destroy_cb_list = sb->s_fs_info;
+ struct destroy_cb *dcb, *tmp;
+
+ list_for_each_entry_safe(dcb, tmp, destroy_cb_list, list) {
+ dcb->callback(dcb->data);
+ list_del(&dcb->list);
+ kfree(dcb);
+ }
+ kfree(destroy_cb_list);
+ kill_litter_super(sb);
+}
+
static struct file_system_type rpc_pipe_fs_type = {
.owner = THIS_MODULE,
.name = "rpc_pipefs",
.mount = rpc_mount,
- .kill_sb = kill_litter_super,
+ .kill_sb = rpc_kill_sb,
};

static void
--
1.7.4

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