/* * FUSE: Filesystem in Userspace * Copyright (C) 2016 Canonical Ltd. * * This program can be distributed under the terms of the GNU GPL. * See the file COPYING. */ #include "fuse_i.h" #include #include struct posix_acl *fuse_get_acl(struct inode *inode, int type) { struct fuse_conn *fc = get_fuse_conn(inode); int size; const char *name; void *value = NULL; struct posix_acl *acl; if (!fc->posix_acl || fc->no_getxattr) return NULL; if (type == ACL_TYPE_ACCESS) name = XATTR_NAME_POSIX_ACL_ACCESS; else if (type == ACL_TYPE_DEFAULT) name = XATTR_NAME_POSIX_ACL_DEFAULT; else return ERR_PTR(-EOPNOTSUPP); value = kmalloc(PAGE_SIZE, GFP_KERNEL); if (!value) return ERR_PTR(-ENOMEM); size = fuse_getxattr(inode, name, value, PAGE_SIZE); if (size > 0) acl = posix_acl_from_xattr(&init_user_ns, value, size); else if ((size == 0) || (size == -ENODATA) || (size == -EOPNOTSUPP && fc->no_getxattr)) acl = NULL; else if (size == -ERANGE) acl = ERR_PTR(-E2BIG); else acl = ERR_PTR(size); kfree(value); return acl; } int fuse_set_acl(struct inode *inode, struct posix_acl *acl, int type) { struct fuse_conn *fc = get_fuse_conn(inode); const char *name; int ret; if (!fc->posix_acl || fc->no_setxattr) return -EOPNOTSUPP; if (type == ACL_TYPE_ACCESS) name = XATTR_NAME_POSIX_ACL_ACCESS; else if (type == ACL_TYPE_DEFAULT) name = XATTR_NAME_POSIX_ACL_DEFAULT; else return -EINVAL; if (acl) { /* * Fuse userspace is responsible for updating access * permissions in the inode, if needed. fuse_setxattr * invalidates the inode attributes, which will force * them to be refreshed the next time they are used, * and it also updates i_ctime. */ size_t size = posix_acl_xattr_size(acl->a_count); void *value; if (size > PAGE_SIZE) return -E2BIG; value = kmalloc(size, GFP_KERNEL); if (!value) return -ENOMEM; ret = posix_acl_to_xattr(&init_user_ns, acl, value, size); if (ret < 0) { kfree(value); return ret; } ret = fuse_setxattr(inode, name, value, size, 0); kfree(value); } else { ret = fuse_removexattr(inode, name); } forget_all_cached_acls(inode); fuse_invalidate_attr(inode); return ret; } class='form'>

path: root/tools/perf/tests/sw-clock.c

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