diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c index 736b607ac8a8..743d3b524fc5 100644 --- a/fs/nfs/dir.c +++ b/fs/nfs/dir.c @@ -435,6 +435,7 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) struct dentry *alias; struct inode *dir = parent->d_inode; struct inode *inode; + int status; if (filename.name[0] == '.') { if (filename.len == 1) @@ -447,7 +448,9 @@ void nfs_prime_dcache(struct dentry *parent, struct nfs_entry *entry) dentry = d_lookup(parent, &filename); if (dentry != NULL) { if (nfs_same_file(dentry, entry)) { - nfs_refresh_inode(dentry->d_inode, entry->fattr); + status = nfs_refresh_inode(dentry->d_inode, entry->fattr); + if (!status) + nfs_setsecurity(dentry->d_inode, entry->fattr, entry->label); goto out; } else { if (d_invalidate(dentry) != 0) @@ -1103,6 +1106,8 @@ static int nfs_lookup_revalidate(struct dentry *dentry, unsigned int flags) if ((error = nfs_refresh_inode(inode, fattr)) != 0) goto out_bad; + nfs_setsecurity(inode, fattr, label); + nfs_free_fattr(fattr); nfs_free_fhandle(fhandle); nfs4_label_free(label); diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c index 12e8ad85ae50..f908af672197 100644 --- a/fs/nfs/inode.c +++ b/fs/nfs/inode.c @@ -162,11 +162,19 @@ static void nfs_zap_caches_locked(struct inode *inode) memset(NFS_I(inode)->cookieverf, 0, sizeof(NFS_I(inode)->cookieverf)); if (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) { - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; nfs_fscache_invalidate(inode); - } else { - nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_ACCESS|NFS_INO_INVALID_ACL|NFS_INO_REVAL_PAGECACHE; - } + nfsi->cache_validity |= NFS_INO_INVALID_ATTR + | NFS_INO_INVALID_LABEL + | NFS_INO_INVALID_DATA + | NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL + | NFS_INO_REVAL_PAGECACHE; + } else + nfsi->cache_validity |= NFS_INO_INVALID_ATTR + | NFS_INO_INVALID_LABEL + | NFS_INO_INVALID_ACCESS + | NFS_INO_INVALID_ACL + | NFS_INO_REVAL_PAGECACHE; } void nfs_zap_caches(struct inode *inode) @@ -258,6 +266,32 @@ nfs_init_locked(struct inode *inode, void *opaque) } #ifdef CONFIG_NFS_V4_SECURITY_LABEL +void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, + struct nfs4_label *label) +{ + int error; + + if (label == NULL) + return; + + if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL) == 0) + return; + + if (NFS_SERVER(inode)->nfs_client->cl_minorversion < 2) + return; + + if ((fattr->valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL) && inode->i_security) { + error = security_inode_notifysecctx(inode, label->label, + label->len); + if (error) + printk(KERN_ERR "%s() %s %d " + "security_inode_notifysecctx() %d\n", + __func__, + (char *)label->label, + label->len, error); + } +} + struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) { struct nfs4_label *label = NULL; @@ -283,7 +317,13 @@ struct nfs4_label *nfs4_label_alloc(struct nfs_server *server, gfp_t flags) return label; } EXPORT_SYMBOL_GPL(nfs4_label_alloc); +#else +void inline nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, + struct nfs4_label *label) +{ +} #endif +EXPORT_SYMBOL_GPL(nfs_setsecurity); /* * This is our front-end to iget that looks up inodes by file handle @@ -412,6 +452,9 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st */ inode->i_blocks = nfs_calc_block_size(fattr->du.nfs3.used); } + + nfs_setsecurity(inode, fattr, label); + nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = now; nfsi->access_cache = RB_ROOT; @@ -421,6 +464,7 @@ nfs_fhget(struct super_block *sb, struct nfs_fh *fh, struct nfs_fattr *fattr, st unlock_new_inode(inode); } else nfs_refresh_inode(inode, fattr); + nfs_setsecurity(inode, fattr, label); dprintk("NFS: nfs_fhget(%s/%Ld fh_crc=0x%08x ct=%d)\n", inode->i_sb->s_id, (long long)NFS_FILEID(inode), @@ -477,7 +521,7 @@ nfs_setattr(struct dentry *dentry, struct iattr *attr) NFS_PROTO(inode)->return_delegation(inode); error = NFS_PROTO(inode)->setattr(dentry, fattr, attr); if (error == 0) - nfs_refresh_inode(inode, fattr); + error = nfs_refresh_inode(inode, fattr); nfs_free_fattr(fattr); out: return error; @@ -901,7 +945,8 @@ static int nfs_attribute_cache_expired(struct inode *inode) */ int nfs_revalidate_inode(struct nfs_server *server, struct inode *inode) { - if (!(NFS_I(inode)->cache_validity & NFS_INO_INVALID_ATTR) + if (!(NFS_I(inode)->cache_validity & + (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) && !nfs_attribute_cache_expired(inode)) return NFS_STALE(inode) ? -ESTALE : 0; return __nfs_revalidate_inode(server, inode); @@ -1281,6 +1326,7 @@ int nfs_post_op_update_inode(struct inode *inode, struct nfs_fattr *fattr) spin_lock(&inode->i_lock); status = nfs_post_op_update_inode_locked(inode, fattr); spin_unlock(&inode->i_lock); + return status; } EXPORT_SYMBOL_GPL(nfs_post_op_update_inode); @@ -1521,7 +1567,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) inode->i_blocks = fattr->du.nfs2.blocks; /* Update attrtimeo value if we're out of the unstable period */ - if (invalid & NFS_INO_INVALID_ATTR) { + if (invalid & (NFS_INO_INVALID_ATTR|NFS_INO_INVALID_LABEL)) { nfs_inc_stats(inode, NFSIOS_ATTRINVALIDATE); nfsi->attrtimeo = NFS_MINATTRTIMEO(inode); nfsi->attrtimeo_timestamp = now; @@ -1534,6 +1580,7 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr) } } invalid &= ~NFS_INO_INVALID_ATTR; + invalid &= ~NFS_INO_INVALID_LABEL; /* Don't invalidate the data if we were to blame */ if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode))) diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c index e9488f5e1037..1dc7aec8e946 100644 --- a/fs/nfs/nfs4proc.c +++ b/fs/nfs/nfs4proc.c @@ -87,6 +87,56 @@ static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *); static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *); #endif + +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static inline struct nfs4_label * +nfs4_label_init_security(struct inode *dir, struct dentry *dentry, + struct iattr *sattr, struct nfs4_label *label) +{ + int err; + + if (label == NULL) + return NULL; + + if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0) + return NULL; + + if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2) + return NULL; + + err = security_dentry_init_security(dentry, sattr->ia_mode, + &dentry->d_name, (void **)&label->label, &label->len); + if (err == 0) + return label; + + return NULL; +} +static inline void +nfs4_label_release_security(struct nfs4_label *label) +{ + if (label) + security_release_secctx(label->label, label->len); +} +static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) +{ + if (label) + return server->attr_bitmask; + + return server->attr_bitmask_nl; +} +#else +static inline struct nfs4_label * +nfs4_label_init_security(struct inode *dir, struct dentry *dentry, + struct iattr *sattr, struct nfs4_label *l) +{ return NULL; } +static inline void +nfs4_label_release_security(struct nfs4_label *label) +{ return; } +static inline u32 * +nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label) +{ return server->attr_bitmask; } +#endif + /* Prevent leaks of NFSv4 errors into userland */ static int nfs4_map_errors(int err) { @@ -135,7 +185,10 @@ const u32 nfs4_fattr_bitmap[3] = { | FATTR4_WORD1_SPACE_USED | FATTR4_WORD1_TIME_ACCESS | FATTR4_WORD1_TIME_METADATA - | FATTR4_WORD1_TIME_MODIFY + | FATTR4_WORD1_TIME_MODIFY, +#ifdef CONFIG_NFS_V4_SECURITY_LABEL + FATTR4_WORD2_SECURITY_LABEL +#endif }; static const u32 nfs4_pnfs_open_bitmap[3] = { @@ -861,7 +914,7 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry, p->o_arg.id.uniquifier = sp->so_seqid.owner_id; p->o_arg.name = &dentry->d_name; p->o_arg.server = server; - p->o_arg.bitmask = server->attr_bitmask; + p->o_arg.bitmask = nfs4_bitmask(server, label); p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0]; p->o_arg.label = label; p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim); @@ -1195,6 +1248,8 @@ _nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data) if (ret) goto err; + nfs_setsecurity(inode, &data->f_attr, data->f_label); + if (data->o_res.delegation_type != 0) nfs4_opendata_check_deleg(data, state); update_open_stateid(state, &data->o_res.stateid, NULL, @@ -2063,6 +2118,7 @@ static int _nfs4_do_open(struct inode *dir, if (status == 0) { nfs_setattr_update_inode(state->inode, sattr); nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr); + nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel); } } @@ -2181,6 +2237,10 @@ static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred, bool truncate; int status; + arg.bitmask = nfs4_bitmask(server, ilabel); + if (ilabel) + arg.bitmask = nfs4_bitmask(server, olabel); + nfs_fattr_init(fattr); /* Servers should only apply open mode checks for file size changes */ @@ -2462,11 +2522,16 @@ static struct inode * nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx, int open_flags, struct iattr *attr) { struct nfs4_state *state; - struct nfs4_label *label = NULL; + struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL; + + label = nfs4_label_init_security(dir, ctx->dentry, attr, &l); /* Protect against concurrent sillydeletes */ state = nfs4_do_open(dir, ctx->dentry, ctx->mode, open_flags, attr, label, ctx->cred, &ctx->mdsthreshold); + + nfs4_label_release_security(label); + if (IS_ERR(state)) return ERR_CAST(state); ctx->state = state; @@ -2526,7 +2591,17 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f server->caps |= NFS_CAP_CTIME; if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY) server->caps |= NFS_CAP_MTIME; +#ifdef CONFIG_NFS_V4_SECURITY_LABEL + if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL) + server->caps |= NFS_CAP_SECURITY_LABEL; +#endif + memcpy(server->attr_bitmask_nl, res.attr_bitmask, + sizeof(server->attr_bitmask)); + if (server->caps & NFS_CAP_SECURITY_LABEL) { + server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + } memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask)); server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE; server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY; @@ -2552,8 +2627,9 @@ int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle) static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *info) { + u32 bitmask[3]; struct nfs4_lookup_root_arg args = { - .bitmask = nfs4_fattr_bitmap, + .bitmask = bitmask, }; struct nfs4_lookup_res res = { .server = server, @@ -2566,6 +2642,13 @@ static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_resp = &res, }; + bitmask[0] = nfs4_fattr_bitmap[0]; + bitmask[1] = nfs4_fattr_bitmap[1]; + /* + * Process the label in the upcoming getfattr + */ + bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL; + nfs_fattr_init(info->fattr); return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } @@ -2773,7 +2856,9 @@ static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, .rpc_argp = &args, .rpc_resp = &res, }; - + + args.bitmask = nfs4_bitmask(server, label); + nfs_fattr_init(fattr); return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0); } @@ -2847,9 +2932,10 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr, return PTR_ERR(label); status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label); - if (status == 0) + if (status == 0) { nfs_setattr_update_inode(inode, sattr); - + nfs_setsecurity(inode, fattr, label); + } nfs4_label_free(label); return status; } @@ -2868,6 +2954,7 @@ static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, struct nfs4_lookup_res res = { .server = server, .fattr = fattr, + .label = label, .fh = fhandle, }; struct rpc_message msg = { @@ -2876,6 +2963,8 @@ static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir, .rpc_resp = &res, }; + args.bitmask = nfs4_bitmask(server, label); + nfs_fattr_init(fattr); dprintk("NFS call lookup %s\n", name->name); @@ -2980,7 +3069,7 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry .rpc_cred = entry->cred, }; int mode = entry->mask; - int status; + int status = 0; /* * Determine which access bits we want to ask for... @@ -3085,7 +3174,7 @@ static int nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, int flags) { - struct nfs4_label *ilabel = NULL; + struct nfs4_label l, *ilabel = NULL; struct nfs_open_context *ctx; struct nfs4_state *state; int status = 0; @@ -3094,6 +3183,8 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, if (IS_ERR(ctx)) return PTR_ERR(ctx); + ilabel = nfs4_label_init_security(dir, dentry, sattr, &l); + sattr->ia_mode &= ~current_umask(); state = nfs4_do_open(dir, dentry, ctx->mode, flags, sattr, ilabel, ctx->cred, @@ -3107,6 +3198,7 @@ nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr, nfs_set_verifier(dentry, nfs_save_change_attribute(dir)); ctx->state = state; out: + nfs4_label_release_security(ilabel); put_nfs_open_context(ctx); return status; } @@ -3155,6 +3247,8 @@ static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir) res->server = server; msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE]; nfs41_init_sequence(&args->seq_args, &res->seq_res, 1); + + nfs_fattr_init(res->dir_attr); } static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data) @@ -3282,11 +3376,14 @@ static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr * status = PTR_ERR(res.label); goto out; } + arg.bitmask = nfs4_bitmask(server, res.label); status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1); if (!status) { update_changeattr(dir, &res.cinfo); - nfs_post_op_update_inode(inode, res.fattr); + status = nfs_post_op_update_inode(inode, res.fattr); + if (!status) + nfs_setsecurity(inode, res.fattr, res.label); } @@ -3339,7 +3436,7 @@ static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir, data->arg.name = name; data->arg.attrs = sattr; data->arg.ftype = ftype; - data->arg.bitmask = server->attr_bitmask; + data->arg.bitmask = nfs4_bitmask(server, data->label); data->res.server = server; data->res.fh = &data->fh; data->res.fattr = &data->fattr; @@ -3400,14 +3497,19 @@ static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry, struct page *page, unsigned int len, struct iattr *sattr) { struct nfs4_exception exception = { }; - struct nfs4_label *label = NULL; + struct nfs4_label l, *label = NULL; int err; + + label = nfs4_label_init_security(dir, dentry, sattr, &l); + do { err = nfs4_handle_exception(NFS_SERVER(dir), _nfs4_proc_symlink(dir, dentry, page, len, sattr, label), &exception); } while (exception.retry); + + nfs4_label_release_security(label); return err; } @@ -3433,15 +3535,19 @@ static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry, struct iattr *sattr) { struct nfs4_exception exception = { }; - struct nfs4_label *label = NULL; + struct nfs4_label l, *label = NULL; int err; + label = nfs4_label_init_security(dir, dentry, sattr, &l); + sattr->ia_mode &= ~current_umask(); do { err = nfs4_handle_exception(NFS_SERVER(dir), _nfs4_proc_mkdir(dir, dentry, sattr, label), &exception); } while (exception.retry); + nfs4_label_release_security(label); + return err; } @@ -3499,7 +3605,7 @@ static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred, } static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, - struct iattr *sattr, dev_t rdev) + struct iattr *sattr, struct nfs4_label *label, dev_t rdev) { struct nfs4_createdata *data; int mode = sattr->ia_mode; @@ -3525,6 +3631,7 @@ static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, goto out_free; } + data->arg.label = label; status = nfs4_do_create(dir, dentry, data); out_free: nfs4_free_createdata(data); @@ -3536,14 +3643,20 @@ static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry, struct iattr *sattr, dev_t rdev) { struct nfs4_exception exception = { }; + struct nfs4_label l, *label = NULL; int err; + label = nfs4_label_init_security(dir, dentry, sattr, &l); + sattr->ia_mode &= ~current_umask(); do { err = nfs4_handle_exception(NFS_SERVER(dir), - _nfs4_proc_mknod(dir, dentry, sattr, rdev), + _nfs4_proc_mknod(dir, dentry, sattr, label, rdev), &exception); } while (exception.retry); + + nfs4_label_release_security(label); + return err; } @@ -4270,6 +4383,155 @@ static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen return err; } +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +static int _nfs4_get_security_label(struct inode *inode, void *buf, + size_t buflen) +{ + struct nfs_server *server = NFS_SERVER(inode); + struct nfs_fattr fattr; + struct nfs4_label label = {0, 0, buflen, buf}; + + u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; + struct nfs4_getattr_arg args = { + .fh = NFS_FH(inode), + .bitmask = bitmask, + }; + struct nfs4_getattr_res res = { + .fattr = &fattr, + .label = &label, + .server = server, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR], + .rpc_argp = &args, + .rpc_resp = &res, + }; + int ret; + + nfs_fattr_init(&fattr); + + ret = rpc_call_sync(server->client, &msg, 0); + if (ret) + return ret; + if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL)) + return -ENOENT; + if (buflen < label.len) + return -ERANGE; + return 0; +} + +static int nfs4_get_security_label(struct inode *inode, void *buf, + size_t buflen) +{ + struct nfs4_exception exception = { }; + int err; + + if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) + return -EOPNOTSUPP; + + do { + err = nfs4_handle_exception(NFS_SERVER(inode), + _nfs4_get_security_label(inode, buf, buflen), + &exception); + } while (exception.retry); + return err; +} + +static int _nfs4_do_set_security_label(struct inode *inode, + struct nfs4_label *ilabel, + struct nfs_fattr *fattr, + struct nfs4_label *olabel) +{ + + struct iattr sattr = {0}; + struct nfs_server *server = NFS_SERVER(inode); + const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL }; + struct nfs_setattrargs args = { + .fh = NFS_FH(inode), + .iap = &sattr, + .server = server, + .bitmask = bitmask, + .label = ilabel, + }; + struct nfs_setattrres res = { + .fattr = fattr, + .label = olabel, + .server = server, + }; + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR], + .rpc_argp = &args, + .rpc_resp = &res, + }; + int status; + + nfs4_stateid_copy(&args.stateid, &zero_stateid); + + status = rpc_call_sync(server->client, &msg, 0); + if (status) + dprintk("%s failed: %d\n", __func__, status); + + return status; +} + +static int nfs4_do_set_security_label(struct inode *inode, + struct nfs4_label *ilabel, + struct nfs_fattr *fattr, + struct nfs4_label *olabel) +{ + struct nfs4_exception exception = { }; + int err; + + do { + err = nfs4_handle_exception(NFS_SERVER(inode), + _nfs4_do_set_security_label(inode, ilabel, + fattr, olabel), + &exception); + } while (exception.retry); + return err; +} + +static int +nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen) +{ + struct nfs4_label ilabel, *olabel = NULL; + struct nfs_fattr fattr; + struct rpc_cred *cred; + struct inode *inode = dentry->d_inode; + int status; + + if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) + return -EOPNOTSUPP; + + nfs_fattr_init(&fattr); + + ilabel.pi = 0; + ilabel.lfs = 0; + ilabel.label = (char *)buf; + ilabel.len = buflen; + + cred = rpc_lookup_cred(); + if (IS_ERR(cred)) + return PTR_ERR(cred); + + olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL); + if (IS_ERR(olabel)) { + status = -PTR_ERR(olabel); + goto out; + } + + status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel); + if (status == 0) + nfs_setsecurity(inode, &fattr, olabel); + + nfs4_label_free(olabel); +out: + put_rpccred(cred); + return status; +} +#endif /* CONFIG_NFS_V4_SECURITY_LABEL */ + + static int nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state) { diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c index 727cfe080eae..2a3f77e14db6 100644 --- a/fs/nfs/nfs4xdr.c +++ b/fs/nfs/nfs4xdr.c @@ -102,12 +102,23 @@ static int nfs4_stat_to_errno(int); #define nfs4_path_maxsz (1 + ((3 + NFS4_MAXPATHLEN) >> 2)) #define nfs4_owner_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) #define nfs4_group_maxsz (1 + XDR_QUADLEN(IDMAP_NAMESZ)) +#ifdef CONFIG_NFS_V4_SECURITY_LABEL +/* PI(4 bytes) + LFS(4 bytes) + 1(for null terminator?) + MAXLABELLEN */ +#define nfs4_label_maxsz (4 + 4 + 1 + XDR_QUADLEN(NFS4_MAXLABELLEN)) +#define encode_readdir_space 24 +#define encode_readdir_bitmask_sz 3 +#else +#define nfs4_label_maxsz 0 +#define encode_readdir_space 20 +#define encode_readdir_bitmask_sz 2 +#endif /* We support only one layout type per file system */ #define decode_mdsthreshold_maxsz (1 + 1 + nfs4_fattr_bitmap_maxsz + 1 + 8) /* This is based on getfattr, which uses the most attributes: */ #define nfs4_fattr_value_maxsz (1 + (1 + 2 + 2 + 4 + 2 + 1 + 1 + 2 + 2 + \ 3 + 3 + 3 + nfs4_owner_maxsz + \ - nfs4_group_maxsz + decode_mdsthreshold_maxsz)) + nfs4_group_maxsz + nfs4_label_maxsz + \ + decode_mdsthreshold_maxsz)) #define nfs4_fattr_maxsz (nfs4_fattr_bitmap_maxsz + \ nfs4_fattr_value_maxsz) #define decode_getattr_maxsz (op_decode_hdr_maxsz + nfs4_fattr_maxsz) @@ -115,6 +126,7 @@ static int nfs4_stat_to_errno(int); 1 + 2 + 1 + \ nfs4_owner_maxsz + \ nfs4_group_maxsz + \ + nfs4_label_maxsz + \ 4 + 4) #define encode_savefh_maxsz (op_encode_hdr_maxsz) #define decode_savefh_maxsz (op_decode_hdr_maxsz) @@ -192,9 +204,11 @@ static int nfs4_stat_to_errno(int); encode_stateid_maxsz + 3) #define decode_read_maxsz (op_decode_hdr_maxsz + 2) #define encode_readdir_maxsz (op_encode_hdr_maxsz + \ - 2 + encode_verifier_maxsz + 5) + 2 + encode_verifier_maxsz + 5 + \ + nfs4_label_maxsz) #define decode_readdir_maxsz (op_decode_hdr_maxsz + \ - decode_verifier_maxsz) + decode_verifier_maxsz + \ + nfs4_label_maxsz + nfs4_fattr_maxsz) #define encode_readlink_maxsz (op_encode_hdr_maxsz) #define decode_readlink_maxsz (op_decode_hdr_maxsz + 1) #define encode_write_maxsz (op_encode_hdr_maxsz + \ @@ -968,7 +982,9 @@ static void encode_nfs4_verifier(struct xdr_stream *xdr, const nfs4_verifier *ve encode_opaque_fixed(xdr, verf->data, NFS4_VERIFIER_SIZE); } -static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const struct nfs_server *server) +static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, + const struct nfs4_label *label, + const struct nfs_server *server) { char owner_name[IDMAP_NAMESZ]; char owner_group[IDMAP_NAMESZ]; @@ -1018,6 +1034,8 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const } len += 4 + (XDR_QUADLEN(owner_grouplen) << 2); } + if (label) + len += 4 + 4 + 4 + (XDR_QUADLEN(label->len) << 2); if (iap->ia_valid & ATTR_ATIME_SET) len += 16; else if (iap->ia_valid & ATTR_ATIME) @@ -1072,6 +1090,13 @@ static void encode_attrs(struct xdr_stream *xdr, const struct iattr *iap, const bmval1 |= FATTR4_WORD1_TIME_MODIFY_SET; *p++ = cpu_to_be32(NFS4_SET_TO_SERVER_TIME); } + if (label) { + bmval2 |= FATTR4_WORD2_SECURITY_LABEL; + *p++ = cpu_to_be32(label->lfs); + *p++ = cpu_to_be32(label->pi); + *p++ = cpu_to_be32(label->len); + p = xdr_encode_opaque_fixed(p, label->label, label->len); + } /* * Now we backfill the bitmap and the attribute buffer length. @@ -1138,7 +1163,7 @@ static void encode_create(struct xdr_stream *xdr, const struct nfs4_create_arg * } encode_string(xdr, create->name->len, create->name->name); - encode_attrs(xdr, create->attrs, create->server); + encode_attrs(xdr, create->attrs, create->label, create->server); } static void encode_getattr_one(struct xdr_stream *xdr, uint32_t bitmap, struct compound_hdr *hdr) @@ -1371,11 +1396,11 @@ static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_op switch(arg->createmode) { case NFS4_CREATE_UNCHECKED: *p = cpu_to_be32(NFS4_CREATE_UNCHECKED); - encode_attrs(xdr, arg->u.attrs, arg->server); + encode_attrs(xdr, arg->u.attrs, arg->label, arg->server); break; case NFS4_CREATE_GUARDED: *p = cpu_to_be32(NFS4_CREATE_GUARDED); - encode_attrs(xdr, arg->u.attrs, arg->server); + encode_attrs(xdr, arg->u.attrs, arg->label, arg->server); break; case NFS4_CREATE_EXCLUSIVE: *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE); @@ -1385,7 +1410,7 @@ static inline void encode_createmode(struct xdr_stream *xdr, const struct nfs_op *p = cpu_to_be32(NFS4_CREATE_EXCLUSIVE4_1); encode_nfs4_verifier(xdr, &arg->u.verifier); dummy.ia_valid = 0; - encode_attrs(xdr, &dummy, arg->server); + encode_attrs(xdr, &dummy, arg->label, arg->server); } } @@ -1536,7 +1561,7 @@ static void encode_read(struct xdr_stream *xdr, const struct nfs_readargs *args, static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg *readdir, struct rpc_rqst *req, struct compound_hdr *hdr) { - uint32_t attrs[2] = { + uint32_t attrs[3] = { FATTR4_WORD0_RDATTR_ERROR, FATTR4_WORD1_MOUNTED_ON_FILEID, }; @@ -1559,20 +1584,26 @@ static void encode_readdir(struct xdr_stream *xdr, const struct nfs4_readdir_arg encode_op_hdr(xdr, OP_READDIR, decode_readdir_maxsz, hdr); encode_uint64(xdr, readdir->cookie); encode_nfs4_verifier(xdr, &readdir->verifier); - p = reserve_space(xdr, 20); + p = reserve_space(xdr, encode_readdir_space); *p++ = cpu_to_be32(dircount); *p++ = cpu_to_be32(readdir->count); - *p++ = cpu_to_be32(2); - + *p++ = cpu_to_be32(encode_readdir_bitmask_sz); *p++ = cpu_to_be32(attrs[0] & readdir->bitmask[0]); - *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]); + *p = cpu_to_be32(attrs[1] & readdir->bitmask[1]); + if (encode_readdir_bitmask_sz > 2) { + if (hdr->minorversion > 1) + attrs[2] |= FATTR4_WORD2_SECURITY_LABEL; + p++, *p++ = cpu_to_be32(attrs[2] & readdir->bitmask[2]); + } memcpy(verf, readdir->verifier.data, sizeof(verf)); - dprintk("%s: cookie = %Lu, verifier = %08x:%08x, bitmap = %08x:%08x\n", + + dprintk("%s: cookie = %llu, verifier = %08x:%08x, bitmap = %08x:%08x:%08x\n", __func__, (unsigned long long)readdir->cookie, verf[0], verf[1], attrs[0] & readdir->bitmask[0], - attrs[1] & readdir->bitmask[1]); + attrs[1] & readdir->bitmask[1], + attrs[2] & readdir->bitmask[2]); } static void encode_readlink(struct xdr_stream *xdr, const struct nfs4_readlink *readlink, struct rpc_rqst *req, struct compound_hdr *hdr) @@ -1631,7 +1662,7 @@ static void encode_setattr(struct xdr_stream *xdr, const struct nfs_setattrargs { encode_op_hdr(xdr, OP_SETATTR, decode_setattr_maxsz, hdr); encode_nfs4_stateid(xdr, &arg->stateid); - encode_attrs(xdr, arg->iap, server); + encode_attrs(xdr, arg->iap, arg->label, server); } static void encode_setclientid(struct xdr_stream *xdr, const struct nfs4_setclientid *setclientid, struct compound_hdr *hdr) @@ -4042,6 +4073,56 @@ static int decode_attr_time_delta(struct xdr_stream *xdr, uint32_t *bitmap, return status; } +static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap, + struct nfs4_label *label) +{ + uint32_t pi = 0; + uint32_t lfs = 0; + __u32 len; + __be32 *p; + int status = 0; + + if (unlikely(bitmap[2] & (FATTR4_WORD2_SECURITY_LABEL - 1U))) + return -EIO; + if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) { + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + lfs = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + pi = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, 4); + if (unlikely(!p)) + goto out_overflow; + len = be32_to_cpup(p++); + p = xdr_inline_decode(xdr, len); + if (unlikely(!p)) + goto out_overflow; + if (len < NFS4_MAXLABELLEN) { + if (label) { + memcpy(label->label, p, len); + label->len = len; + label->pi = pi; + label->lfs = lfs; + status = NFS_ATTR_FATTR_V4_SECURITY_LABEL; + } + bitmap[2] &= ~FATTR4_WORD2_SECURITY_LABEL; + } else + printk(KERN_WARNING "%s: label too long (%u)!\n", + __func__, len); + } + if (label && label->label) + dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__, + (char *)label->label, label->len, label->pi, label->lfs); + return status; + +out_overflow: + print_overflow_msg(__func__, xdr); + return -EIO; +} + static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time) { int status = 0; @@ -4384,7 +4465,7 @@ out_overflow: static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fattr *fattr, struct nfs_fh *fh, - struct nfs4_fs_locations *fs_loc, + struct nfs4_fs_locations *fs_loc, struct nfs4_label *label, const struct nfs_server *server) { int status; @@ -4492,6 +4573,13 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap, if (status < 0) goto xdr_error; + if (label) { + status = decode_attr_security_label(xdr, bitmap, label); + if (status < 0) + goto xdr_error; + fattr->valid |= status; + } + xdr_error: dprintk("%s: xdr returned %d\n", __func__, -status); return status; @@ -4499,7 +4587,7 @@ xdr_error: static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fattr, struct nfs_fh *fh, struct nfs4_fs_locations *fs_loc, - const struct nfs_server *server) + struct nfs4_label *label, const struct nfs_server *server) { unsigned int savep; uint32_t attrlen, @@ -4518,7 +4606,8 @@ static int decode_getfattr_generic(struct xdr_stream *xdr, struct nfs_fattr *fat if (status < 0) goto xdr_error; - status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, server); + status = decode_getfattr_attrs(xdr, bitmap, fattr, fh, fs_loc, + label, server); if (status < 0) goto xdr_error; @@ -4528,10 +4617,16 @@ xdr_error: return status; } +static int decode_getfattr_label(struct xdr_stream *xdr, struct nfs_fattr *fattr, + struct nfs4_label *label, const struct nfs_server *server) +{ + return decode_getfattr_generic(xdr, fattr, NULL, NULL, label, server); +} + static int decode_getfattr(struct xdr_stream *xdr, struct nfs_fattr *fattr, const struct nfs_server *server) { - return decode_getfattr_generic(xdr, fattr, NULL, NULL, server); + return decode_getfattr_generic(xdr, fattr, NULL, NULL, NULL, server); } /* @@ -5923,7 +6018,7 @@ static int nfs4_xdr_dec_lookup(struct rpc_rqst *rqstp, struct xdr_stream *xdr, status = decode_getfh(xdr, res->fh); if (status) goto out; - status = decode_getfattr(xdr, res->fattr, res->server); + status = decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -5949,7 +6044,8 @@ static int nfs4_xdr_dec_lookup_root(struct rpc_rqst *rqstp, goto out; status = decode_getfh(xdr, res->fh); if (status == 0) - status = decode_getfattr(xdr, res->fattr, res->server); + status = decode_getfattr_label(xdr, res->fattr, + res->label, res->server); out: return status; } @@ -6040,7 +6136,7 @@ static int nfs4_xdr_dec_link(struct rpc_rqst *rqstp, struct xdr_stream *xdr, status = decode_restorefh(xdr); if (status) goto out; - decode_getfattr(xdr, res->fattr, res->server); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -6069,7 +6165,7 @@ static int nfs4_xdr_dec_create(struct rpc_rqst *rqstp, struct xdr_stream *xdr, status = decode_getfh(xdr, res->fh); if (status) goto out; - decode_getfattr(xdr, res->fattr, res->server); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -6101,7 +6197,7 @@ static int nfs4_xdr_dec_getattr(struct rpc_rqst *rqstp, struct xdr_stream *xdr, status = decode_putfh(xdr); if (status) goto out; - status = decode_getfattr(xdr, res->fattr, res->server); + status = decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -6234,7 +6330,7 @@ static int nfs4_xdr_dec_open(struct rpc_rqst *rqstp, struct xdr_stream *xdr, goto out; if (res->access_request) decode_access(xdr, &res->access_supported, &res->access_result); - decode_getfattr(xdr, res->f_attr, res->server); + decode_getfattr_label(xdr, res->f_attr, res->f_label, res->server); out: return status; } @@ -6311,7 +6407,7 @@ static int nfs4_xdr_dec_setattr(struct rpc_rqst *rqstp, status = decode_setattr(xdr); if (status) goto out; - decode_getfattr(xdr, res->fattr, res->server); + decode_getfattr_label(xdr, res->fattr, res->label, res->server); out: return status; } @@ -6700,7 +6796,7 @@ static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, xdr_enter_page(xdr, PAGE_SIZE); status = decode_getfattr_generic(xdr, &res->fs_locations->fattr, NULL, res->fs_locations, - res->fs_locations->server); + NULL, res->fs_locations->server); out: return status; } @@ -7113,7 +7209,7 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry, goto out_overflow; if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh, - NULL, entry->server) < 0) + NULL, entry->label, entry->server) < 0) goto out_overflow; if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) entry->ino = entry->fattr->mounted_on_fileid; diff --git a/fs/nfs/super.c b/fs/nfs/super.c index b30c003b47d1..76e1ee5d03ed 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -2417,8 +2417,21 @@ static int nfs_bdi_register(struct nfs_server *server) int nfs_set_sb_security(struct super_block *s, struct dentry *mntroot, struct nfs_mount_info *mount_info) { - return security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts, - 0, NULL); + int error; + unsigned long kflags = 0, kflags_out = 0; + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL) + kflags |= SECURITY_LSM_NATIVE_LABELS; + + error = security_sb_set_mnt_opts(s, &mount_info->parsed->lsm_opts, + kflags, &kflags_out); + if (error) + goto err; + + if (NFS_SB(s)->caps & NFS_CAP_SECURITY_LABEL && + !(kflags_out & SECURITY_LSM_NATIVE_LABELS)) + NFS_SB(s)->caps &= ~NFS_CAP_SECURITY_LABEL; +err: + return error; } EXPORT_SYMBOL_GPL(nfs_set_sb_security); diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h index 3489015950b4..d4b003d9e78d 100644 --- a/include/linux/nfs_fs.h +++ b/include/linux/nfs_fs.h @@ -207,6 +207,7 @@ struct nfs_inode { #define NFS_INO_INVALID_ACL 0x0010 /* cached acls are invalid */ #define NFS_INO_REVAL_PAGECACHE 0x0020 /* must revalidate pagecache */ #define NFS_INO_REVAL_FORCED 0x0040 /* force revalidation ignoring a delegation */ +#define NFS_INO_INVALID_LABEL 0x0080 /* cached label is invalid */ /* * Bit offsets in flags field @@ -352,6 +353,8 @@ extern int __nfs_revalidate_inode(struct nfs_server *, struct inode *); extern int nfs_revalidate_mapping(struct inode *inode, struct address_space *mapping); extern int nfs_setattr(struct dentry *, struct iattr *); extern void nfs_setattr_update_inode(struct inode *inode, struct iattr *attr); +extern void nfs_setsecurity(struct inode *inode, struct nfs_fattr *fattr, + struct nfs4_label *label); extern struct nfs_open_context *get_nfs_open_context(struct nfs_open_context *ctx); extern void put_nfs_open_context(struct nfs_open_context *ctx); extern struct nfs_open_context *nfs_find_open_context(struct inode *inode, struct rpc_cred *cred, fmode_t mode); diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index d4348ab1e0e4..d2212432c456 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -146,6 +146,11 @@ struct nfs_server { u32 attr_bitmask[3];/* V4 bitmask representing the set of attributes supported on this filesystem */ + u32 attr_bitmask_nl[3]; + /* V4 bitmask representing the + set of attributes supported + on this filesystem excluding + the label support bit. */ u32 cache_consistency_bitmask[3]; /* V4 bitmask representing the subset of change attribute, size, ctime diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index 6149633ff715..9f8e9b2e717a 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -2908,7 +2908,10 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name, return; } + isec->sclass = inode_mode_to_security_class(inode->i_mode); isec->sid = newsid; + isec->initialized = 1; + return; } @@ -2996,6 +2999,7 @@ static int selinux_inode_setsecurity(struct inode *inode, const char *name, if (rc) return rc; + isec->sclass = inode_mode_to_security_class(inode->i_mode); isec->sid = newsid; isec->initialized = 1; return 0;