1/* 2 * Convert ZFS/NFSv4 acls to NT acls and vice versa. 3 * 4 * Copyright (C) Jiri Sasek, 2007 5 * based on the foobar.c module which is copyrighted by Volker Lendecke 6 * 7 * Many thanks to Axel Apitz for help to fix the special ace's handling 8 * issues. 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 3 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * GNU General Public License for more details. 19 * 20 * You should have received a copy of the GNU General Public License 21 * along with this program; if not, see <http://www.gnu.org/licenses/>. 22 * 23 */ 24 25#include "includes.h" 26#include "nfs4_acls.h" 27 28#undef DBGC_CLASS 29#define DBGC_CLASS DBGC_VFS 30 31#define ZFSACL_MODULE_NAME "zfsacl" 32 33/* zfs_get_nt_acl() 34 * read the local file's acls and return it in NT form 35 * using the NFSv4 format conversion 36 */ 37static NTSTATUS zfs_get_nt_acl_common(const char *name, 38 uint32 security_info, 39 SMB4ACL_T **ppacl) 40{ 41 int naces, i; 42 ace_t *acebuf; 43 SMB4ACL_T *pacl; 44 TALLOC_CTX *mem_ctx; 45 46 /* read the number of file aces */ 47 if((naces = acl(name, ACE_GETACLCNT, 0, NULL)) == -1) { 48 if(errno == ENOSYS) { 49 DEBUG(9, ("acl(ACE_GETACLCNT, %s): Operation is not " 50 "supported on the filesystem where the file " 51 "reside", name)); 52 } else { 53 DEBUG(9, ("acl(ACE_GETACLCNT, %s): %s ", name, 54 strerror(errno))); 55 } 56 return map_nt_error_from_unix(errno); 57 } 58 /* allocate the field of ZFS aces */ 59 mem_ctx = talloc_tos(); 60 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces); 61 if(acebuf == NULL) { 62 return NT_STATUS_NO_MEMORY; 63 } 64 /* read the aces into the field */ 65 if(acl(name, ACE_GETACL, naces, acebuf) < 0) { 66 DEBUG(9, ("acl(ACE_GETACL, %s): %s ", name, 67 strerror(errno))); 68 return map_nt_error_from_unix(errno); 69 } 70 /* create SMB4ACL data */ 71 if((pacl = smb_create_smb4acl()) == NULL) { 72 return NT_STATUS_NO_MEMORY; 73 } 74 for(i=0; i<naces; i++) { 75 SMB_ACE4PROP_T aceprop; 76 77 aceprop.aceType = (uint32) acebuf[i].a_type; 78 aceprop.aceFlags = (uint32) acebuf[i].a_flags; 79 aceprop.aceMask = (uint32) acebuf[i].a_access_mask; 80 aceprop.who.id = (uint32) acebuf[i].a_who; 81 82 if(aceprop.aceFlags & ACE_OWNER) { 83 aceprop.flags = SMB_ACE4_ID_SPECIAL; 84 aceprop.who.special_id = SMB_ACE4_WHO_OWNER; 85 } else if(aceprop.aceFlags & ACE_GROUP) { 86 aceprop.flags = SMB_ACE4_ID_SPECIAL; 87 aceprop.who.special_id = SMB_ACE4_WHO_GROUP; 88 } else if(aceprop.aceFlags & ACE_EVERYONE) { 89 aceprop.flags = SMB_ACE4_ID_SPECIAL; 90 aceprop.who.special_id = SMB_ACE4_WHO_EVERYONE; 91 } else { 92 aceprop.flags = 0; 93 } 94 if(smb_add_ace4(pacl, &aceprop) == NULL) 95 return NT_STATUS_NO_MEMORY; 96 } 97 98 *ppacl = pacl; 99 return NT_STATUS_OK; 100} 101 102/* call-back function processing the NT acl -> ZFS acl using NFSv4 conv. */ 103static bool zfs_process_smbacl(files_struct *fsp, SMB4ACL_T *smbacl) 104{ 105 int naces = smb_get_naces(smbacl), i; 106 ace_t *acebuf; 107 SMB4ACE_T *smbace; 108 TALLOC_CTX *mem_ctx; 109 110 /* allocate the field of ZFS aces */ 111 mem_ctx = talloc_tos(); 112 acebuf = (ace_t *) talloc_size(mem_ctx, sizeof(ace_t)*naces); 113 if(acebuf == NULL) { 114 errno = ENOMEM; 115 return False; 116 } 117 /* handle all aces */ 118 for(smbace = smb_first_ace4(smbacl), i = 0; 119 smbace!=NULL; 120 smbace = smb_next_ace4(smbace), i++) { 121 SMB_ACE4PROP_T *aceprop = smb_get_ace4(smbace); 122 123 acebuf[i].a_type = aceprop->aceType; 124 acebuf[i].a_flags = aceprop->aceFlags; 125 acebuf[i].a_access_mask = aceprop->aceMask; 126 acebuf[i].a_who = aceprop->who.id; 127 if(aceprop->flags & SMB_ACE4_ID_SPECIAL) { 128 switch(aceprop->who.special_id) { 129 case SMB_ACE4_WHO_EVERYONE: 130 acebuf[i].a_flags |= ACE_EVERYONE; 131 break; 132 case SMB_ACE4_WHO_OWNER: 133 acebuf[i].a_flags |= ACE_OWNER; 134 break; 135 case SMB_ACE4_WHO_GROUP: 136 acebuf[i].a_flags |= ACE_GROUP; 137 break; 138 default: 139 DEBUG(8, ("unsupported special_id %d\n", \ 140 aceprop->who.special_id)); 141 continue; /* don't add it !!! */ 142 } 143 } 144 } 145 SMB_ASSERT(i == naces); 146 147 /* store acl */ 148 if(acl(fsp->fsp_name->base_name, ACE_SETACL, naces, acebuf)) { 149 if(errno == ENOSYS) { 150 DEBUG(9, ("acl(ACE_SETACL, %s): Operation is not " 151 "supported on the filesystem where the file " 152 "reside", fsp_str_dbg(fsp))); 153 } else { 154 DEBUG(9, ("acl(ACE_SETACL, %s): %s ", fsp_str_dbg(fsp), 155 strerror(errno))); 156 } 157 return 0; 158 } 159 160 return True; 161} 162 163/* zfs_set_nt_acl() 164 * set the local file's acls obtaining it in NT form 165 * using the NFSv4 format conversion 166 */ 167static NTSTATUS zfs_set_nt_acl(vfs_handle_struct *handle, files_struct *fsp, 168 uint32 security_info_sent, 169 const struct security_descriptor *psd) 170{ 171 return smb_set_nt_acl_nfs4(fsp, security_info_sent, psd, 172 zfs_process_smbacl); 173} 174 175static NTSTATUS zfsacl_fget_nt_acl(struct vfs_handle_struct *handle, 176 struct files_struct *fsp, 177 uint32 security_info, 178 struct security_descriptor **ppdesc) 179{ 180 SMB4ACL_T *pacl; 181 NTSTATUS status; 182 183 status = zfs_get_nt_acl_common(fsp->fsp_name->base_name, security_info, 184 &pacl); 185 if (!NT_STATUS_IS_OK(status)) { 186 return status; 187 } 188 189 return smb_fget_nt_acl_nfs4(fsp, security_info, ppdesc, pacl); 190} 191 192static NTSTATUS zfsacl_get_nt_acl(struct vfs_handle_struct *handle, 193 const char *name, uint32 security_info, 194 struct security_descriptor **ppdesc) 195{ 196 SMB4ACL_T *pacl; 197 NTSTATUS status; 198 199 status = zfs_get_nt_acl_common(name, security_info, &pacl); 200 if (!NT_STATUS_IS_OK(status)) { 201 return status; 202 } 203 204 return smb_get_nt_acl_nfs4(handle->conn, name, security_info, ppdesc, 205 pacl); 206} 207 208static NTSTATUS zfsacl_fset_nt_acl(vfs_handle_struct *handle, 209 files_struct *fsp, 210 uint32 security_info_sent, 211 const SEC_DESC *psd) 212{ 213 return zfs_set_nt_acl(handle, fsp, security_info_sent, psd); 214} 215 216/* nils.goroll@hamburg.de 2008-06-16 : 217 218 See also 219 - https://bugzilla.samba.org/show_bug.cgi?id=5446 220 - http://bugs.opensolaris.org/view_bug.do?bug_id=6688240 221 222 Solaris supports NFSv4 and ZFS ACLs through a common system call, acl(2) 223 with ACE_SETACL / ACE_GETACL / ACE_GETACLCNT, which is being wrapped for 224 use by samba in this module. 225 226 As the acl(2) interface is identical for ZFS and for NFS, this module, 227 vfs_zfsacl, can not only be used for ZFS, but also for sharing NFSv4 228 mounts on Solaris. 229 230 But while "traditional" POSIX DRAFT ACLs (using acl(2) with SETACL 231 / GETACL / GETACLCNT) fail for ZFS, the Solaris NFS client 232 implemets a compatibility wrapper, which will make calls to 233 traditional ACL calls though vfs_solarisacl succeed. As the 234 compatibility wrapper's implementation is (by design) incomplete, 235 we want to make sure that it is never being called. 236 237 As long as Samba does not support an exiplicit method for a module 238 to define conflicting vfs methods, we should override all conflicting 239 methods here. 240 241 For this to work, we need to make sure that this module is initialised 242 *after* vfs_solarisacl 243 244 Function declarations taken from vfs_solarisacl 245*/ 246 247SMB_ACL_T zfsacl_fail__sys_acl_get_file(vfs_handle_struct *handle, 248 const char *path_p, 249 SMB_ACL_TYPE_T type) 250{ 251 return (SMB_ACL_T)NULL; 252} 253SMB_ACL_T zfsacl_fail__sys_acl_get_fd(vfs_handle_struct *handle, 254 files_struct *fsp, 255 int fd) 256{ 257 return (SMB_ACL_T)NULL; 258} 259 260int zfsacl_fail__sys_acl_set_file(vfs_handle_struct *handle, 261 const char *name, 262 SMB_ACL_TYPE_T type, 263 SMB_ACL_T theacl) 264{ 265 return -1; 266} 267 268int zfsacl_fail__sys_acl_set_fd(vfs_handle_struct *handle, 269 files_struct *fsp, 270 int fd, SMB_ACL_T theacl) 271{ 272 return -1; 273} 274 275int zfsacl_fail__sys_acl_delete_def_file(vfs_handle_struct *handle, 276 const char *path) 277{ 278 return -1; 279} 280 281/* VFS operations structure */ 282 283static struct vfs_fn_pointers zfsacl_fns = { 284 .sys_acl_get_file = zfsacl_fail__sys_acl_get_file, 285 .sys_acl_get_fd = zfsacl_fail__sys_acl_get_fd, 286 .sys_acl_set_file = zfsacl_fail__sys_acl_set_file, 287 .sys_acl_set_fd = zfsacl_fail__sys_acl_set_fd, 288 .sys_acl_delete_def_file = zfsacl_fail__sys_acl_delete_def_file, 289 .fget_nt_acl = zfsacl_fget_nt_acl, 290 .get_nt_acl = zfsacl_get_nt_acl, 291 .fset_nt_acl = zfsacl_fset_nt_acl, 292}; 293 294NTSTATUS vfs_zfsacl_init(void); 295NTSTATUS vfs_zfsacl_init(void) 296{ 297 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "zfsacl", 298 &zfsacl_fns); 299} 300