| /* |
| * 9p system.posix* xattr callback |
| * |
| * Copyright IBM, Corp. 2010 |
| * |
| * Authors: |
| * Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> |
| * |
| * This work is licensed under the terms of the GNU GPL, version 2. See |
| * the COPYING file in the top-level directory. |
| * |
| */ |
| |
| #include <sys/types.h> |
| #include "qemu/xattr.h" |
| #include "virtio-9p.h" |
| #include "fsdev/file-op-9p.h" |
| #include "virtio-9p-xattr.h" |
| |
| #define MAP_ACL_ACCESS "user.virtfs.system.posix_acl_access" |
| #define MAP_ACL_DEFAULT "user.virtfs.system.posix_acl_default" |
| #define ACL_ACCESS "system.posix_acl_access" |
| #define ACL_DEFAULT "system.posix_acl_default" |
| |
| static ssize_t mp_pacl_getxattr(FsContext *ctx, const char *path, |
| const char *name, void *value, size_t size) |
| { |
| char *buffer; |
| ssize_t ret; |
| |
| buffer = rpath(ctx, path); |
| ret = lgetxattr(buffer, MAP_ACL_ACCESS, value, size); |
| g_free(buffer); |
| return ret; |
| } |
| |
| static ssize_t mp_pacl_listxattr(FsContext *ctx, const char *path, |
| char *name, void *value, size_t osize) |
| { |
| ssize_t len = sizeof(ACL_ACCESS); |
| |
| if (!value) { |
| return len; |
| } |
| |
| if (osize < len) { |
| errno = ERANGE; |
| return -1; |
| } |
| |
| /* len includes the trailing NUL */ |
| memcpy(value, ACL_ACCESS, len); |
| return 0; |
| } |
| |
| static int mp_pacl_setxattr(FsContext *ctx, const char *path, const char *name, |
| void *value, size_t size, int flags) |
| { |
| char *buffer; |
| int ret; |
| |
| buffer = rpath(ctx, path); |
| ret = lsetxattr(buffer, MAP_ACL_ACCESS, value, size, flags); |
| g_free(buffer); |
| return ret; |
| } |
| |
| static int mp_pacl_removexattr(FsContext *ctx, |
| const char *path, const char *name) |
| { |
| int ret; |
| char *buffer; |
| |
| buffer = rpath(ctx, path); |
| ret = lremovexattr(buffer, MAP_ACL_ACCESS); |
| if (ret == -1 && errno == ENODATA) { |
| /* |
| * We don't get ENODATA error when trying to remove a |
| * posix acl that is not present. So don't throw the error |
| * even in case of mapped security model |
| */ |
| errno = 0; |
| ret = 0; |
| } |
| g_free(buffer); |
| return ret; |
| } |
| |
| static ssize_t mp_dacl_getxattr(FsContext *ctx, const char *path, |
| const char *name, void *value, size_t size) |
| { |
| char *buffer; |
| ssize_t ret; |
| |
| buffer = rpath(ctx, path); |
| ret = lgetxattr(buffer, MAP_ACL_DEFAULT, value, size); |
| g_free(buffer); |
| return ret; |
| } |
| |
| static ssize_t mp_dacl_listxattr(FsContext *ctx, const char *path, |
| char *name, void *value, size_t osize) |
| { |
| ssize_t len = sizeof(ACL_DEFAULT); |
| |
| if (!value) { |
| return len; |
| } |
| |
| if (osize < len) { |
| errno = ERANGE; |
| return -1; |
| } |
| |
| /* len includes the trailing NUL */ |
| memcpy(value, ACL_DEFAULT, len); |
| return 0; |
| } |
| |
| static int mp_dacl_setxattr(FsContext *ctx, const char *path, const char *name, |
| void *value, size_t size, int flags) |
| { |
| char *buffer; |
| int ret; |
| |
| buffer = rpath(ctx, path); |
| ret = lsetxattr(buffer, MAP_ACL_DEFAULT, value, size, flags); |
| g_free(buffer); |
| return ret; |
| } |
| |
| static int mp_dacl_removexattr(FsContext *ctx, |
| const char *path, const char *name) |
| { |
| int ret; |
| char *buffer; |
| |
| buffer = rpath(ctx, path); |
| ret = lremovexattr(buffer, MAP_ACL_DEFAULT); |
| if (ret == -1 && errno == ENODATA) { |
| /* |
| * We don't get ENODATA error when trying to remove a |
| * posix acl that is not present. So don't throw the error |
| * even in case of mapped security model |
| */ |
| errno = 0; |
| ret = 0; |
| } |
| g_free(buffer); |
| return ret; |
| } |
| |
| |
| XattrOperations mapped_pacl_xattr = { |
| .name = "system.posix_acl_access", |
| .getxattr = mp_pacl_getxattr, |
| .setxattr = mp_pacl_setxattr, |
| .listxattr = mp_pacl_listxattr, |
| .removexattr = mp_pacl_removexattr, |
| }; |
| |
| XattrOperations mapped_dacl_xattr = { |
| .name = "system.posix_acl_default", |
| .getxattr = mp_dacl_getxattr, |
| .setxattr = mp_dacl_setxattr, |
| .listxattr = mp_dacl_listxattr, |
| .removexattr = mp_dacl_removexattr, |
| }; |
| |
| XattrOperations passthrough_acl_xattr = { |
| .name = "system.posix_acl_", |
| .getxattr = pt_getxattr, |
| .setxattr = pt_setxattr, |
| .listxattr = pt_listxattr, |
| .removexattr = pt_removexattr, |
| }; |
| |
| XattrOperations none_acl_xattr = { |
| .name = "system.posix_acl_", |
| .getxattr = notsup_getxattr, |
| .setxattr = notsup_setxattr, |
| .listxattr = notsup_listxattr, |
| .removexattr = notsup_removexattr, |
| }; |