6926afd192
...so that we can do the uid/gid mapping outside the asynchronous RPC context. This fixes a bug in the current NFSv4 atomic open code where the client isn't able to determine what the true uid/gid fields of the file are, (because the asynchronous nature of the OPEN call denies it the ability to do an upcall) and so fills them with default values, marking the inode as needing revalidation. Unfortunately, in some cases, the VFS will do some additional sanity checks on the file, and may override the server's decision to allow the open because it sees the wrong owner/group fields. Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
116 lines
3.5 KiB
C
116 lines
3.5 KiB
C
/*
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* include/linux/nfs_idmap.h
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*
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* UID and GID to name mapping for clients.
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*
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* Copyright (c) 2002 The Regents of the University of Michigan.
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* All rights reserved.
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*
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* Marius Aamodt Eriksen <marius@umich.edu>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
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* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef NFS_IDMAP_H
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#define NFS_IDMAP_H
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#include <linux/types.h>
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/* XXX from bits/utmp.h */
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#define IDMAP_NAMESZ 128
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#define IDMAP_TYPE_USER 0
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#define IDMAP_TYPE_GROUP 1
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#define IDMAP_CONV_IDTONAME 0
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#define IDMAP_CONV_NAMETOID 1
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#define IDMAP_STATUS_INVALIDMSG 0x01
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#define IDMAP_STATUS_AGAIN 0x02
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#define IDMAP_STATUS_LOOKUPFAIL 0x04
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#define IDMAP_STATUS_SUCCESS 0x08
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struct idmap_msg {
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__u8 im_type;
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__u8 im_conv;
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char im_name[IDMAP_NAMESZ];
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__u32 im_id;
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__u8 im_status;
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};
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#ifdef __KERNEL__
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/* Forward declaration to make this header independent of others */
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struct nfs_client;
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struct nfs_server;
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struct nfs_fattr;
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struct nfs4_string;
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#ifdef CONFIG_NFS_USE_NEW_IDMAPPER
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int nfs_idmap_init(void);
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void nfs_idmap_quit(void);
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static inline int nfs_idmap_new(struct nfs_client *clp)
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{
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return 0;
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}
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static inline void nfs_idmap_delete(struct nfs_client *clp)
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{
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}
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#else /* CONFIG_NFS_USE_NEW_IDMAPPER not set */
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static inline int nfs_idmap_init(void)
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{
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return 0;
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}
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static inline void nfs_idmap_quit(void)
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{
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}
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int nfs_idmap_new(struct nfs_client *);
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void nfs_idmap_delete(struct nfs_client *);
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#endif /* CONFIG_NFS_USE_NEW_IDMAPPER */
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void nfs_fattr_init_names(struct nfs_fattr *fattr,
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struct nfs4_string *owner_name,
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struct nfs4_string *group_name);
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void nfs_fattr_free_names(struct nfs_fattr *);
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void nfs_fattr_map_and_free_names(struct nfs_server *, struct nfs_fattr *);
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int nfs_map_name_to_uid(const struct nfs_server *, const char *, size_t, __u32 *);
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int nfs_map_group_to_gid(const struct nfs_server *, const char *, size_t, __u32 *);
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int nfs_map_uid_to_name(const struct nfs_server *, __u32, char *, size_t);
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int nfs_map_gid_to_group(const struct nfs_server *, __u32, char *, size_t);
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extern unsigned int nfs_idmap_cache_timeout;
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#endif /* __KERNEL__ */
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#endif /* NFS_IDMAP_H */
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