/* * Mapping of UID/GIDs to name and vice versa. * * Copyright (c) 2002, 2003 The Regents of the University of * Michigan. All rights reserved. * * Marius Aamodt Eriksen <[email protected]> * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the University nor the names of its * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include <linux/module.h> #include <linux/seq_file.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/sunrpc/svc_xprt.h> #include <net/net_namespace.h> #include "idmap.h" #include "nfsd.h" #include "netns.h" #include "vfs.h" /* * Turn off idmapping when using AUTH_SYS. */ static bool nfs4_disable_idmapping = …; module_param(nfs4_disable_idmapping, bool, 0644); MODULE_PARM_DESC(…) …; /* * Cache entry */ /* * XXX we know that IDMAP_NAMESZ < PAGE_SIZE, but it's ugly to rely on * that. */ struct ent { … }; /* Common entry handling */ #define ENT_HASHBITS … #define ENT_HASHMAX … static void ent_init(struct cache_head *cnew, struct cache_head *citm) { … } static void ent_put(struct kref *ref) { … } static struct cache_head * ent_alloc(void) { … } /* * ID -> Name cache */ static uint32_t idtoname_hash(struct ent *ent) { … } static int idtoname_upcall(struct cache_detail *cd, struct cache_head *h) { … } static void idtoname_request(struct cache_detail *cd, struct cache_head *ch, char **bpp, int *blen) { … } static int idtoname_match(struct cache_head *ca, struct cache_head *cb) { … } static int idtoname_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h) { … } static void warn_no_idmapd(struct cache_detail *detail, int has_died) { … } static int idtoname_parse(struct cache_detail *, char *, int); static struct ent *idtoname_lookup(struct cache_detail *, struct ent *); static struct ent *idtoname_update(struct cache_detail *, struct ent *, struct ent *); static const struct cache_detail idtoname_cache_template = …; static int idtoname_parse(struct cache_detail *cd, char *buf, int buflen) { … } static struct ent * idtoname_lookup(struct cache_detail *cd, struct ent *item) { … } static struct ent * idtoname_update(struct cache_detail *cd, struct ent *new, struct ent *old) { … } /* * Name -> ID cache */ static inline int nametoid_hash(struct ent *ent) { … } static int nametoid_upcall(struct cache_detail *cd, struct cache_head *h) { … } static void nametoid_request(struct cache_detail *cd, struct cache_head *ch, char **bpp, int *blen) { … } static int nametoid_match(struct cache_head *ca, struct cache_head *cb) { … } static int nametoid_show(struct seq_file *m, struct cache_detail *cd, struct cache_head *h) { … } static struct ent *nametoid_lookup(struct cache_detail *, struct ent *); static struct ent *nametoid_update(struct cache_detail *, struct ent *, struct ent *); static int nametoid_parse(struct cache_detail *, char *, int); static const struct cache_detail nametoid_cache_template = …; static int nametoid_parse(struct cache_detail *cd, char *buf, int buflen) { … } static struct ent * nametoid_lookup(struct cache_detail *cd, struct ent *item) { … } static struct ent * nametoid_update(struct cache_detail *cd, struct ent *new, struct ent *old) { … } /* * Exported API */ int nfsd_idmap_init(struct net *net) { … } void nfsd_idmap_shutdown(struct net *net) { … } static int idmap_lookup(struct svc_rqst *rqstp, struct ent *(*lookup_fn)(struct cache_detail *, struct ent *), struct ent *key, struct cache_detail *detail, struct ent **item) { … } static char * rqst_authname(struct svc_rqst *rqstp) { … } static __be32 idmap_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u32 *id) { … } static __be32 encode_ascii_id(struct xdr_stream *xdr, u32 id) { … } static __be32 idmap_id_to_name(struct xdr_stream *xdr, struct svc_rqst *rqstp, int type, u32 id) { … } static bool numeric_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u32 *id) { … } static __be32 do_name_to_id(struct svc_rqst *rqstp, int type, const char *name, u32 namelen, u32 *id) { … } static __be32 encode_name_from_id(struct xdr_stream *xdr, struct svc_rqst *rqstp, int type, u32 id) { … } __be32 nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen, kuid_t *uid) { … } __be32 nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen, kgid_t *gid) { … } __be32 nfsd4_encode_user(struct xdr_stream *xdr, struct svc_rqst *rqstp, kuid_t uid) { … } __be32 nfsd4_encode_group(struct xdr_stream *xdr, struct svc_rqst *rqstp, kgid_t gid) { … }
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