return error;
}
-static int path_setxattr(const char __user *pathname,
- const char __user *name, const void __user *value,
- size_t size, int flags, unsigned int lookup_flags)
+static int path_setxattrat(int dfd, const char __user *pathname,
+ unsigned int at_flags, const char __user *name,
+ const void __user *value, size_t size, int flags)
{
struct xattr_name kname;
struct kernel_xattr_ctx ctx = {
- .cvalue = value,
- .kvalue = NULL,
- .size = size,
- .kname = &kname,
- .flags = flags,
+ .cvalue = value,
+ .kvalue = NULL,
+ .size = size,
+ .kname = &kname,
+ .flags = flags,
};
+ struct filename *filename;
+ unsigned int lookup_flags = 0;
int error;
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ return -EINVAL;
+
+ if (!(at_flags & AT_SYMLINK_NOFOLLOW))
+ lookup_flags = LOOKUP_FOLLOW;
+
error = setxattr_copy(name, &ctx);
if (error)
return error;
- error = filename_setxattr(AT_FDCWD, getname(pathname), lookup_flags,
- &ctx);
+ filename = getname_maybe_null(pathname, at_flags);
+ if (!filename) {
+ CLASS(fd, f)(dfd);
+ if (fd_empty(f))
+ error = -EBADF;
+ else
+ error = file_setxattr(fd_file(f), &ctx);
+ } else {
+ error = filename_setxattr(dfd, filename, lookup_flags, &ctx);
+ }
kvfree(ctx.kvalue);
return error;
}
+SYSCALL_DEFINE6(setxattrat, int, dfd, const char __user *, pathname, unsigned int, at_flags,
+ const char __user *, name, const struct xattr_args __user *, uargs,
+ size_t, usize)
+{
+ struct xattr_args args = {};
+ int error;
+
+ BUILD_BUG_ON(sizeof(struct xattr_args) < XATTR_ARGS_SIZE_VER0);
+ BUILD_BUG_ON(sizeof(struct xattr_args) != XATTR_ARGS_SIZE_LATEST);
+
+ if (unlikely(usize < XATTR_ARGS_SIZE_VER0))
+ return -EINVAL;
+ if (usize > PAGE_SIZE)
+ return -E2BIG;
+
+ error = copy_struct_from_user(&args, sizeof(args), uargs, usize);
+ if (error)
+ return error;
+
+ return path_setxattrat(dfd, pathname, at_flags, name,
+ u64_to_user_ptr(args.value), args.size,
+ args.flags);
+}
+
SYSCALL_DEFINE5(setxattr, const char __user *, pathname,
const char __user *, name, const void __user *, value,
size_t, size, int, flags)
{
- return path_setxattr(pathname, name, value, size, flags, LOOKUP_FOLLOW);
+ return path_setxattrat(AT_FDCWD, pathname, 0, name, value, size, flags);
}
SYSCALL_DEFINE5(lsetxattr, const char __user *, pathname,
const char __user *, name, const void __user *, value,
size_t, size, int, flags)
{
- return path_setxattr(pathname, name, value, size, flags, 0);
+ return path_setxattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, name,
+ value, size, flags);
}
SYSCALL_DEFINE5(fsetxattr, int, fd, const char __user *, name,
const void __user *,value, size_t, size, int, flags)
{
- struct xattr_name kname;
- struct kernel_xattr_ctx ctx = {
- .cvalue = value,
- .kvalue = NULL,
- .size = size,
- .kname = &kname,
- .flags = flags,
- };
- int error;
-
- CLASS(fd, f)(fd);
-
- if (fd_empty(f))
- return -EBADF;
-
- error = setxattr_copy(name, &ctx);
- if (error)
- return error;
-
- error = file_setxattr(fd_file(f), &ctx);
- kvfree(ctx.kvalue);
- return error;
+ return path_setxattrat(fd, NULL, AT_EMPTY_PATH, name,
+ value, size, flags);
}
/*
return error;
}
-static ssize_t path_getxattr(const char __user *pathname,
- const char __user *name, void __user *value,
- size_t size, unsigned int lookup_flags)
+static ssize_t path_getxattrat(int dfd, const char __user *pathname,
+ unsigned int at_flags, const char __user *name,
+ void __user *value, size_t size)
{
- ssize_t error;
struct xattr_name kname;
struct kernel_xattr_ctx ctx = {
.value = value,
.kname = &kname,
.flags = 0,
};
+ struct filename *filename;
+ ssize_t error;
+
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ return -EINVAL;
error = import_xattr_name(&kname, name);
if (error)
return error;
- return filename_getxattr(AT_FDCWD, getname(pathname), lookup_flags, &ctx);
+
+ filename = getname_maybe_null(pathname, at_flags);
+ if (!filename) {
+ CLASS(fd, f)(dfd);
+ if (fd_empty(f))
+ return -EBADF;
+ return file_getxattr(fd_file(f), &ctx);
+ } else {
+ int lookup_flags = 0;
+ if (!(at_flags & AT_SYMLINK_NOFOLLOW))
+ lookup_flags = LOOKUP_FOLLOW;
+ return filename_getxattr(dfd, filename, lookup_flags, &ctx);
+ }
+}
+
+SYSCALL_DEFINE6(getxattrat, int, dfd, const char __user *, pathname, unsigned int, at_flags,
+ const char __user *, name, struct xattr_args __user *, uargs, size_t, usize)
+{
+ struct xattr_args args = {};
+ int error;
+
+ BUILD_BUG_ON(sizeof(struct xattr_args) < XATTR_ARGS_SIZE_VER0);
+ BUILD_BUG_ON(sizeof(struct xattr_args) != XATTR_ARGS_SIZE_LATEST);
+
+ if (unlikely(usize < XATTR_ARGS_SIZE_VER0))
+ return -EINVAL;
+ if (usize > PAGE_SIZE)
+ return -E2BIG;
+
+ error = copy_struct_from_user(&args, sizeof(args), uargs, usize);
+ if (error)
+ return error;
+
+ if (args.flags != 0)
+ return -EINVAL;
+
+ return path_getxattrat(dfd, pathname, at_flags, name,
+ u64_to_user_ptr(args.value), args.size);
}
SYSCALL_DEFINE4(getxattr, const char __user *, pathname,
const char __user *, name, void __user *, value, size_t, size)
{
- return path_getxattr(pathname, name, value, size, LOOKUP_FOLLOW);
+ return path_getxattrat(AT_FDCWD, pathname, 0, name, value, size);
}
SYSCALL_DEFINE4(lgetxattr, const char __user *, pathname,
const char __user *, name, void __user *, value, size_t, size)
{
- return path_getxattr(pathname, name, value, size, 0);
+ return path_getxattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, name,
+ value, size);
}
SYSCALL_DEFINE4(fgetxattr, int, fd, const char __user *, name,
void __user *, value, size_t, size)
{
- ssize_t error;
- struct xattr_name kname;
- struct kernel_xattr_ctx ctx = {
- .value = value,
- .size = size,
- .kname = &kname,
- .flags = 0,
- };
- CLASS(fd, f)(fd);
-
- if (fd_empty(f))
- return -EBADF;
- error = import_xattr_name(&kname, name);
- if (error)
- return error;
- return file_getxattr(fd_file(f), &ctx);
+ return path_getxattrat(fd, NULL, AT_EMPTY_PATH, name, value, size);
}
/*
return error;
}
-static ssize_t path_listxattr(const char __user *pathname, char __user *list,
- size_t size, unsigned int lookup_flags)
+static ssize_t path_listxattrat(int dfd, const char __user *pathname,
+ unsigned int at_flags, char __user *list,
+ size_t size)
+{
+ struct filename *filename;
+ int lookup_flags;
+
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ return -EINVAL;
+
+ filename = getname_maybe_null(pathname, at_flags);
+ if (!filename) {
+ CLASS(fd, f)(dfd);
+ if (fd_empty(f))
+ return -EBADF;
+ return file_listxattr(fd_file(f), list, size);
+ }
+
+ lookup_flags = (at_flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
+ return filename_listxattr(dfd, filename, lookup_flags, list, size);
+}
+
+SYSCALL_DEFINE5(listxattrat, int, dfd, const char __user *, pathname,
+ unsigned int, at_flags,
+ char __user *, list, size_t, size)
{
- return filename_listxattr(AT_FDCWD, getname(pathname), lookup_flags,
- list, size);
+ return path_listxattrat(dfd, pathname, at_flags, list, size);
}
SYSCALL_DEFINE3(listxattr, const char __user *, pathname, char __user *, list,
size_t, size)
{
- return path_listxattr(pathname, list, size, LOOKUP_FOLLOW);
+ return path_listxattrat(AT_FDCWD, pathname, 0, list, size);
}
SYSCALL_DEFINE3(llistxattr, const char __user *, pathname, char __user *, list,
size_t, size)
{
- return path_listxattr(pathname, list, size, 0);
+ return path_listxattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, list, size);
}
SYSCALL_DEFINE3(flistxattr, int, fd, char __user *, list, size_t, size)
{
- CLASS(fd, f)(fd);
-
- if (fd_empty(f))
- return -EBADF;
- return file_listxattr(fd_file(f), list, size);
+ return path_listxattrat(fd, NULL, AT_EMPTY_PATH, list, size);
}
/*
return error;
}
-static int path_removexattr(const char __user *pathname,
- const char __user *name, unsigned int lookup_flags)
+static int path_removexattrat(int dfd, const char __user *pathname,
+ unsigned int at_flags, const char __user *name)
{
struct xattr_name kname;
+ struct filename *filename;
+ unsigned int lookup_flags;
int error;
+ if ((at_flags & ~(AT_SYMLINK_NOFOLLOW | AT_EMPTY_PATH)) != 0)
+ return -EINVAL;
+
error = import_xattr_name(&kname, name);
if (error)
return error;
- return filename_removexattr(AT_FDCWD, getname(pathname), lookup_flags,
- &kname);
+
+ filename = getname_maybe_null(pathname, at_flags);
+ if (!filename) {
+ CLASS(fd, f)(dfd);
+ if (fd_empty(f))
+ return -EBADF;
+ return file_removexattr(fd_file(f), &kname);
+ }
+ lookup_flags = (at_flags & AT_SYMLINK_NOFOLLOW) ? 0 : LOOKUP_FOLLOW;
+ return filename_removexattr(dfd, filename, lookup_flags, &kname);
+}
+
+SYSCALL_DEFINE4(removexattrat, int, dfd, const char __user *, pathname,
+ unsigned int, at_flags, const char __user *, name)
+{
+ return path_removexattrat(dfd, pathname, at_flags, name);
}
SYSCALL_DEFINE2(removexattr, const char __user *, pathname,
const char __user *, name)
{
- return path_removexattr(pathname, name, LOOKUP_FOLLOW);
+ return path_removexattrat(AT_FDCWD, pathname, 0, name);
}
SYSCALL_DEFINE2(lremovexattr, const char __user *, pathname,
const char __user *, name)
{
- return path_removexattr(pathname, name, 0);
+ return path_removexattrat(AT_FDCWD, pathname, AT_SYMLINK_NOFOLLOW, name);
}
SYSCALL_DEFINE2(fremovexattr, int, fd, const char __user *, name)
{
- CLASS(fd, f)(fd);
- struct xattr_name kname;
- int error;
-
- if (fd_empty(f))
- return -EBADF;
-
- error = import_xattr_name(&kname, name);
- if (error)
- return error;
- return file_removexattr(fd_file(f), &kname);
+ return path_removexattrat(fd, NULL, AT_EMPTY_PATH, name);
}
int xattr_list_one(char **buffer, ssize_t *remaining_size, const char *name)
projects / thirdparty / linux.git / commitdiff
