From f05d147f7e3cf0d86b3a4bd5603029a7cb109633 Mon Sep 17 00:00:00 2001 From: Bryan Schumaker Date: Fri, 27 Apr 2012 13:27:41 -0400 Subject: NFS: Fix following referral mount points with different security I create a new proc_lookup_mountpoint() to use when submounting an NFS v4 share. This function returns an rpc_clnt to use for performing an fs_locations() call on a referral's mountpoint. Signed-off-by: Bryan Schumaker Signed-off-by: Trond Myklebust --- fs/nfs/nfs4proc.c | 40 ++++++++++++++++++++++++++++++---------- 1 file changed, 30 insertions(+), 10 deletions(-) (limited to 'fs/nfs/nfs4proc.c') diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index 3d92fe6be780..75eb883ed4ce 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -2377,8 +2377,9 @@ static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *fhandle, * Note that we'll actually follow the referral later when * we detect fsid mismatch in inode revalidation */ -static int nfs4_get_referral(struct inode *dir, const struct qstr *name, - struct nfs_fattr *fattr, struct nfs_fh *fhandle) +static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, struct nfs_fattr *fattr, + struct nfs_fh *fhandle) { int status = -ENOMEM; struct page *page = NULL; @@ -2391,7 +2392,7 @@ static int nfs4_get_referral(struct inode *dir, const struct qstr *name, if (locations == NULL) goto out; - status = nfs4_proc_fs_locations(dir, name, locations, page); + status = nfs4_proc_fs_locations(client, dir, name, locations, page); if (status != 0) goto out; /* Make sure server returned a different fsid for the referral */ @@ -2550,7 +2551,7 @@ static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir, err = -ENOENT; goto out; case -NFS4ERR_MOVED: - err = nfs4_get_referral(dir, name, fattr, fhandle); + err = nfs4_get_referral(client, dir, name, fattr, fhandle); goto out; case -NFS4ERR_WRONGSEC: err = -EPERM; @@ -2591,6 +2592,21 @@ static int nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct qst return status; } +struct rpc_clnt * +nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name, + struct nfs_fh *fhandle, struct nfs_fattr *fattr) +{ + int status; + struct rpc_clnt *client = rpc_clone_client(NFS_CLIENT(dir)); + + status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr); + if (status < 0) { + rpc_shutdown_client(client); + return ERR_PTR(status); + } + return client; +} + static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry) { struct nfs_server *server = NFS_SERVER(inode); @@ -4951,8 +4967,10 @@ static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr) fattr->nlink = 2; } -static int _nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, - struct nfs4_fs_locations *fs_locations, struct page *page) +static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, + struct nfs4_fs_locations *fs_locations, + struct page *page) { struct nfs_server *server = NFS_SERVER(dir); u32 bitmask[2] = { @@ -4986,19 +5004,21 @@ static int _nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, nfs_fattr_init(&fs_locations->fattr); fs_locations->server = server; fs_locations->nlocations = 0; - status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); + status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0); dprintk("%s: returned status = %d\n", __func__, status); return status; } -int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, - struct nfs4_fs_locations *fs_locations, struct page *page) +int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir, + const struct qstr *name, + struct nfs4_fs_locations *fs_locations, + struct page *page) { struct nfs4_exception exception = { }; int err; do { err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_fs_locations(dir, name, fs_locations, page), + _nfs4_proc_fs_locations(client, dir, name, fs_locations, page), &exception); } while (exception.retry); return err; -- cgit v1.2.2