diff options
Diffstat (limited to 'source3/modules/vfs_posixacl.c')
| -rw-r--r-- | source3/modules/vfs_posixacl.c | 391 |
1 files changed, 391 insertions, 0 deletions
diff --git a/source3/modules/vfs_posixacl.c b/source3/modules/vfs_posixacl.c new file mode 100644 index 0000000000..6d7c2b3c00 --- /dev/null +++ b/source3/modules/vfs_posixacl.c @@ -0,0 +1,391 @@ +/* + Unix SMB/Netbios implementation. + VFS module to get and set posix acls + Copyright (C) Volker Lendecke 2006 + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. +*/ + +#include "includes.h" + + +/* prototypes for static functions first - for clarity */ + +static BOOL smb_ace_to_internal(acl_entry_t posix_ace, + struct smb_acl_entry *ace); +static struct smb_acl_t *smb_acl_to_internal(acl_t acl); +static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm); +static acl_t smb_acl_to_posix(const struct smb_acl_t *acl); + + +/* public functions - the api */ + +SMB_ACL_T posixacl_sys_acl_get_file(vfs_handle_struct *handle, + const char *path_p, + SMB_ACL_TYPE_T type) +{ + struct smb_acl_t *result; + acl_type_t acl_type; + acl_t acl; + + switch(type) { + case SMB_ACL_TYPE_ACCESS: + acl_type = ACL_TYPE_ACCESS; + break; + case SMB_ACL_TYPE_DEFAULT: + acl_type = ACL_TYPE_DEFAULT; + break; + default: + errno = EINVAL; + return NULL; + } + + acl = acl_get_file(path_p, acl_type); + + if (acl == NULL) { + return NULL; + } + + result = smb_acl_to_internal(acl); + acl_free(acl); + return result; +} + +SMB_ACL_T posixacl_sys_acl_get_fd(vfs_handle_struct *handle, + files_struct *fsp, + int fd) +{ + struct smb_acl_t *result; + acl_t acl = acl_get_fd(fd); + + if (acl == NULL) { + return NULL; + } + + result = smb_acl_to_internal(acl); + acl_free(acl); + return result; +} + +int posixacl_sys_acl_set_file(vfs_handle_struct *handle, + const char *name, + SMB_ACL_TYPE_T type, + SMB_ACL_T theacl) +{ + int res; + acl_type_t acl_type; + acl_t acl; + + DEBUG(10, ("Calling acl_set_file: %s, %d\n", name, type)); + + switch(type) { + case SMB_ACL_TYPE_ACCESS: + acl_type = ACL_TYPE_ACCESS; + break; + case SMB_ACL_TYPE_DEFAULT: + acl_type = ACL_TYPE_DEFAULT; + break; + default: + errno = EINVAL; + return -1; + } + + if ((acl = smb_acl_to_posix(theacl)) == NULL) { + return -1; + } + res = acl_set_file(name, acl_type, acl); + if (res != 0) { + DEBUG(10, ("acl_set_file failed: %s\n", strerror(errno))); + } + acl_free(acl); + return res; +} + +int posixacl_sys_acl_set_fd(vfs_handle_struct *handle, + files_struct *fsp, + int fd, SMB_ACL_T theacl) +{ + int res; + acl_t acl = smb_acl_to_posix(theacl); + if (acl == NULL) { + return -1; + } + res = acl_set_fd(fd, acl); + acl_free(acl); + return res; +} + +int posixacl_sys_acl_delete_def_file(vfs_handle_struct *handle, + const char *path) +{ + return acl_delete_def_file(path); +} + + +/* private functions */ + +static BOOL smb_ace_to_internal(acl_entry_t posix_ace, + struct smb_acl_entry *ace) +{ + acl_tag_t tag; + acl_permset_t permset; + + if (acl_get_tag_type(posix_ace, &tag) != 0) { + DEBUG(0, ("smb_acl_get_tag_type failed\n")); + return False; + } + + switch(tag) { + case ACL_USER: + ace->a_type = SMB_ACL_USER; + break; + case ACL_USER_OBJ: + ace->a_type = SMB_ACL_USER_OBJ; + break; + case ACL_GROUP: + ace->a_type = SMB_ACL_GROUP; + break; + case ACL_GROUP_OBJ: + ace->a_type = SMB_ACL_GROUP_OBJ; + break; + case ACL_OTHER: + ace->a_type = SMB_ACL_OTHER; + break; + case ACL_MASK: + ace->a_type = SMB_ACL_MASK; + break; + default: + DEBUG(0, ("unknown tag type %d\n", (unsigned int)tag)); + return False; + } + switch(ace->a_type) { + case SMB_ACL_USER: { + uid_t *puid = acl_get_qualifier(posix_ace); + if (puid == NULL) { + DEBUG(0, ("smb_acl_get_qualifier failed\n")); + return False; + } + ace->uid = *puid; + acl_free(puid); + break; + } + + case SMB_ACL_GROUP: { + gid_t *pgid = acl_get_qualifier(posix_ace); + if (pgid == NULL) { + DEBUG(0, ("smb_acl_get_qualifier failed\n")); + return False; + } + ace->gid = *pgid; + acl_free(pgid); + break; + } + default: + break; + } + if (acl_get_permset(posix_ace, &permset) != 0) { + DEBUG(0, ("smb_acl_get_mode failed\n")); + return False; + } + ace->a_perm = 0; + ace->a_perm |= (acl_get_perm(permset, ACL_READ) ? SMB_ACL_READ : 0); + ace->a_perm |= (acl_get_perm(permset, ACL_WRITE) ? SMB_ACL_WRITE : 0); + ace->a_perm |= (acl_get_perm(permset, ACL_EXECUTE) ? SMB_ACL_EXECUTE : 0); + return True; +} + +static struct smb_acl_t *smb_acl_to_internal(acl_t acl) +{ + struct smb_acl_t *result = SMB_MALLOC_P(struct smb_acl_t); + int entry_id = ACL_FIRST_ENTRY; + acl_entry_t e; + if (result == NULL) { + return NULL; + } + ZERO_STRUCTP(result); + while (acl_get_entry(acl, entry_id, &e) == 1) { + + entry_id = ACL_NEXT_ENTRY; + + result = SMB_REALLOC(result, sizeof(struct smb_acl_t) + + (sizeof(struct smb_acl_entry) * + (result->count+1))); + if (result == NULL) { + DEBUG(0, ("SMB_REALLOC failed\n")); + errno = ENOMEM; + return NULL; + } + + if (!smb_ace_to_internal(e, &result->acl[result->count])) { + SAFE_FREE(result); + return NULL; + } + + result->count += 1; + } + return result; +} + +static int smb_acl_set_mode(acl_entry_t entry, SMB_ACL_PERM_T perm) +{ + int ret; + acl_permset_t permset; + + if ((ret = acl_get_permset(entry, &permset)) != 0) { + return ret; + } + if ((ret = acl_clear_perms(permset)) != 0) { + return ret; + } + if ((perm & SMB_ACL_READ) && + ((ret = acl_add_perm(permset, ACL_READ)) != 0)) { + return ret; + } + if ((perm & SMB_ACL_WRITE) && + ((ret = acl_add_perm(permset, ACL_WRITE)) != 0)) { + return ret; + } + if ((perm & SMB_ACL_EXECUTE) && + ((ret = acl_add_perm(permset, ACL_EXECUTE)) != 0)) { + return ret; + } + return acl_set_permset(entry, permset); +} + +static acl_t smb_acl_to_posix(const struct smb_acl_t *acl) +{ + acl_t result; + int i; + + result = acl_init(acl->count); + if (result == NULL) { + DEBUG(10, ("acl_init failed\n")); + return NULL; + } + + for (i=0; i<acl->count; i++) { + const struct smb_acl_entry *entry = &acl->acl[i]; + acl_entry_t e; + acl_tag_t tag; + + if (acl_create_entry(&result, &e) != 0) { + DEBUG(1, ("acl_create_entry failed: %s\n", + strerror(errno))); + goto fail; + } + + switch (entry->a_type) { + case SMB_ACL_USER: + tag = ACL_USER; + break; + case SMB_ACL_USER_OBJ: + tag = ACL_USER_OBJ; + break; + case SMB_ACL_GROUP: + tag = ACL_GROUP; + break; + case SMB_ACL_GROUP_OBJ: + tag = ACL_GROUP_OBJ; + break; + case SMB_ACL_OTHER: + tag = ACL_OTHER; + break; + case SMB_ACL_MASK: + tag = ACL_MASK; + break; + default: + DEBUG(1, ("Unknown tag value %d\n", entry->a_type)); + goto fail; + } + + if (acl_set_tag_type(e, tag) != 0) { + DEBUG(10, ("acl_set_tag_type(%d) failed: %s\n", + tag, strerror(errno))); + goto fail; + } + + switch (entry->a_type) { + case SMB_ACL_USER: + if (acl_set_qualifier(e, &entry->uid) != 0) { + DEBUG(1, ("acl_set_qualifiier failed: %s\n", + strerror(errno))); + goto fail; + } + break; + case SMB_ACL_GROUP: + if (acl_set_qualifier(e, &entry->gid) != 0) { + DEBUG(1, ("acl_set_qualifiier failed: %s\n", + strerror(errno))); + goto fail; + } + break; + default: /* Shut up, compiler! :-) */ + break; + } + + if (smb_acl_set_mode(e, entry->a_perm) != 0) { + goto fail; + } + } + + if (acl_valid(result) != 0) { + DEBUG(0, ("smb_acl_to_posix: ACL is invalid for set (%s)\n", + strerror(errno))); + goto fail; + } + + return result; + + fail: + if (result != NULL) { + acl_free(result); + } + return NULL; +} + +/* VFS operations structure */ + +static vfs_op_tuple posixacl_op_tuples[] = { + /* Disk operations */ + {SMB_VFS_OP(posixacl_sys_acl_get_file), + SMB_VFS_OP_SYS_ACL_GET_FILE, + SMB_VFS_LAYER_TRANSPARENT}, + + {SMB_VFS_OP(posixacl_sys_acl_get_fd), + SMB_VFS_OP_SYS_ACL_GET_FD, + SMB_VFS_LAYER_TRANSPARENT}, + + {SMB_VFS_OP(posixacl_sys_acl_set_file), + SMB_VFS_OP_SYS_ACL_SET_FILE, + SMB_VFS_LAYER_TRANSPARENT}, + + {SMB_VFS_OP(posixacl_sys_acl_set_fd), + SMB_VFS_OP_SYS_ACL_SET_FD, + SMB_VFS_LAYER_TRANSPARENT}, + + {SMB_VFS_OP(posixacl_sys_acl_delete_def_file), + SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE, + SMB_VFS_LAYER_TRANSPARENT}, + + {SMB_VFS_OP(NULL), + SMB_VFS_OP_NOOP, + SMB_VFS_LAYER_NOOP} +}; + +NTSTATUS vfs_posixacl_init(void) +{ + return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "posixacl", + posixacl_op_tuples); +} |