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SUSE:SLE-12-SP2:GA
util-linux.3352
util-linux-libmount-btrfs-cleanup-1.patch
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File util-linux-libmount-btrfs-cleanup-1.patch of Package util-linux.3352
From 5a9713293d5f0e20230646fc403ec4a5bf8c1a1f Mon Sep 17 00:00:00 2001 From: Karel Zak <kzak@redhat.com> Date: Tue, 26 Jan 2016 14:39:13 +0100 Subject: [PATCH 1/2] libmount: consolidate btrfs stuff, make it more portable - add --with-btrfs (enabled by default) - check for linux/btrfs.h - add "btrfs" to libmount features list (see mount -V) - #ifdef HAVE_BTRFS_SUPPORT for all btrfs stuff in libmount Signed-off-by: Karel Zak <kzak@redhat.com> --- configure.ac | 22 ++++++++ libmount/src/Makemodule.am | 7 ++- libmount/src/btrfs.c | 90 +++++++++++++++++++++++++++++---- libmount/src/btrfs.h | 122 --------------------------------------------- libmount/src/tab.c | 3 ++ libmount/src/version.c | 3 ++ 6 files changed, 114 insertions(+), 133 deletions(-) delete mode 100644 libmount/src/btrfs.h Index: util-linux-2.25/configure.ac =================================================================== --- util-linux-2.25.orig/configure.ac +++ util-linux-2.25/configure.ac @@ -174,6 +174,7 @@ AC_CHECK_HEADERS([ \ fcntl.h \ getopt.h \ inttypes.h \ + linux/btrfs.h \ linux/cdrom.h \ linux/falloc.h \ linux/watchdog.h \ @@ -224,6 +225,7 @@ AC_CHECK_HEADERS([langinfo.h], dnl Convert some ac_cv_header_* variables to have_* dnl +have_linux_btrfs_h=$ac_cv_header_linux_btrfs_h have_linux_raw_h=$ac_cv_header_linux_raw_h have_linux_securebits_h=$ac_cv_header_linux_securebits_h have_linux_watchdog_h=$ac_cv_header_linux_watchdog_h @@ -1588,6 +1590,25 @@ UL_BUILD_INIT([write]) AM_CONDITIONAL([BUILD_WRITE], [test "x$build_write" = xyes]) +AC_ARG_WITH([btrfs], + AS_HELP_STRING([--with-btrfs], [build with support for btrfs]), + [], [with_btrfs=check] +) +have_btrfs=no +AS_IF([test "x$with_btrfs" != xno], [ + AS_CASE([$with_btrfs:$have_linux_btrfs_h], + [yes:no], + [AC_MSG_ERROR([btrfs selected but linux/btrfs.h not found])], + [check:no], + [AC_MSG_WARN([linux/btrfs.h not found, do not build with btrfs support])], + [*:yes], + [have_btrfs=yes + AC_DEFINE([HAVE_BTRFS_SUPPORT], [1], [Define if btrfs stuff is available])] + ) +]) +AM_CONDITIONAL([HAVE_BTRFS], [test "x$have_btrfs" = xyes]) + + AC_ARG_WITH([systemd], AS_HELP_STRING([--with-systemd], [build with support for systemd]), [], [with_systemd=check] @@ -1835,6 +1856,7 @@ AC_MSG_RESULT([ Bash completions: ${with_bashcompletiondir} Systemd support: ${have_systemd} + Btrfs support: ${have_btrfs} warnings: Index: util-linux-2.25/libmount/src/btrfs.c =================================================================== --- util-linux-2.25.orig/libmount/src/btrfs.c +++ util-linux-2.25/libmount/src/btrfs.c @@ -1,4 +1,5 @@ /* + * Copyright (C) 1999 Andrea Arcangeli <andrea@suse.de> * Copyright (C) 2016 David Sterba <dsterba@suse.cz> * Copyright (C) 2016 Stanislav Brabec <sbrabec@suse.cz> * @@ -6,17 +7,89 @@ * GNU Lesser General Public License. */ +#include <dirent.h> +#include <sys/ioctl.h> +#include <libio.h> +#include <stdint.h> +#include <linux/btrfs.h> + +#include "mountP.h" +#include "bitops.h" + + +/* linux/btrfs.h lacks large parts of stuff needed for getting default + * sub-volume. Suppose that if BTRFS_DIR_ITEM_KEY is not defined, all + * declarations are still missing. + */ +#ifndef BTRFS_DIR_ITEM_KEY + +/* + * dir items are the name -> inode pointers in a directory. There is one + * for every name in a directory. + */ +#define BTRFS_DIR_ITEM_KEY 84 + +/* holds pointers to all of the tree roots */ +#define BTRFS_ROOT_TREE_OBJECTID 1ULL + +/* directory objectid inside the root tree */ +#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL + /* - * SECTION: btrfs - * @title: btrfs - * @short_description: special function for btrfs + * the key defines the order in the tree, and so it also defines (optimal) + * block layout. objectid corresonds to the inode number. The flags + * tells us things about the object, and is a kind of stream selector. + * so for a given inode, keys with flags of 1 might refer to the inode + * data, flags of 2 may point to file data in the btree and flags == 3 + * may point to extents. + * + * offset is the starting byte offset for this key in the stream. * - * btrfs contains function needed for manipulation with btrfs. + * btrfs_disk_key is in disk byte order. struct btrfs_key is always + * in cpu native order. Otherwise they are identical and their sizes + * should be the same (ie both packed) */ -#include <dirent.h> -#include <sys/ioctl.h> -#include <linux/magic.h> -#include "btrfs.h" +struct btrfs_disk_key { + uint64_t objectid; /* little endian */ + uint8_t type; + uint64_t offset; /* little endian */ +} __attribute__ ((__packed__)); + +struct btrfs_dir_item { + struct btrfs_disk_key location; + uint64_t transid; /* little endian */ + uint16_t data_len; /* little endian */ + uint16_t name_len; /* little endian */ + uint8_t type; +} __attribute__ ((__packed__)); + +#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ +static inline uint##bits##_t btrfs_##name(const type *s) \ +{ \ + return le##bits##_to_cpu(s->member); \ +} \ +static inline void btrfs_set_##name(type *s, uint##bits##_t val) \ +{ \ + s->member = cpu_to_le##bits(val); \ +} + +/* struct btrfs_disk_key */ +BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, + objectid, 64); + +BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16); + +/* + Red Black Trees +*/ +struct rb_node { + unsigned long __rb_parent_color; + struct rb_node *rb_right; + struct rb_node *rb_left; +} __attribute__((aligned(sizeof(long)))); + /* The alignment might seem pointless, but allegedly CRIS needs it */ + +#endif /* BTRFS_DIR_ITEM_KEY */ /* * btrfs_get_default_subvol_id: @@ -97,6 +170,5 @@ uint64_t btrfs_get_default_subvol_id(con out: closedir(dirstream); - return found; } Index: util-linux-2.25/libmount/src/btrfs.h =================================================================== --- util-linux-2.25.orig/libmount/src/btrfs.h +++ /dev/null @@ -1,122 +0,0 @@ -/* This is an excerpt from btrfs-progs-v4.3.1 - * All kernel types are converted to stdint.h types. */ - -/* - * Copyright (C) 2007 Oracle. All rights reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public - * License v2 as published by the Free Software Foundation. - * - * 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., 59 Temple Place - Suite 330, - * Boston, MA 021110-1307, USA. - */ - -#include <libio.h> -#include <stdint.h> -#include <linux/btrfs.h> -#include "mountP.h" -#include "bitops.h" - - -/* linux/btrfs.h lacks large parts of stuff needed for getting default - * sub-volume. Suppose that if BTRFS_DIR_ITEM_KEY is not defined, all - * declarations are still missing. - */ -#ifndef BTRFS_DIR_ITEM_KEY - - -/* from ctree.h */ - -/* - * dir items are the name -> inode pointers in a directory. There is one - * for every name in a directory. - */ -#define BTRFS_DIR_ITEM_KEY 84 - -/* holds pointers to all of the tree roots */ -#define BTRFS_ROOT_TREE_OBJECTID 1ULL - -/* directory objectid inside the root tree */ -#define BTRFS_ROOT_TREE_DIR_OBJECTID 6ULL - -/* - * the key defines the order in the tree, and so it also defines (optimal) - * block layout. objectid corresonds to the inode number. The flags - * tells us things about the object, and is a kind of stream selector. - * so for a given inode, keys with flags of 1 might refer to the inode - * data, flags of 2 may point to file data in the btree and flags == 3 - * may point to extents. - * - * offset is the starting byte offset for this key in the stream. - * - * btrfs_disk_key is in disk byte order. struct btrfs_key is always - * in cpu native order. Otherwise they are identical and their sizes - * should be the same (ie both packed) - */ -struct btrfs_disk_key { - uint64_t objectid; /* little endian */ - uint8_t type; - uint64_t offset; /* little endian */ -} __attribute__ ((__packed__)); - -struct btrfs_dir_item { - struct btrfs_disk_key location; - uint64_t transid; /* little endian */ - uint16_t data_len; /* little endian */ - uint16_t name_len; /* little endian */ - uint8_t type; -} __attribute__ ((__packed__)); - -#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \ -static inline uint##bits##_t btrfs_##name(const type *s) \ -{ \ - return le##bits##_to_cpu(s->member); \ -} \ -static inline void btrfs_set_##name(type *s, uint##bits##_t val) \ -{ \ - s->member = cpu_to_le##bits(val); \ -} - -/* struct btrfs_disk_key */ -BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, - objectid, 64); - -BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16); - - -/* from rbtree.h */ - -/* - Red Black Trees - (C) 1999 Andrea Arcangeli <andrea@suse.de> - - 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ -struct rb_node { - unsigned long __rb_parent_color; - struct rb_node *rb_right; - struct rb_node *rb_left; -} __attribute__((aligned(sizeof(long)))); - /* The alignment might seem pointless, but allegedly CRIS needs it */ - -#endif Index: util-linux-2.25/libmount/src/tab.c =================================================================== --- util-linux-2.25.orig/libmount/src/tab.c +++ util-linux-2.25/libmount/src/tab.c @@ -1370,6 +1370,7 @@ struct libmnt_fs *mnt_table_get_fs_root( } } +#ifdef HAVE_BTRFS_SUPPORT /* * btrfs-subvolume mount -- get subvolume name and use it as a root-fs path */ @@ -1436,6 +1437,8 @@ struct libmnt_fs *mnt_table_get_fs_root( memcpy(p, vol, volsz); *(root + sz) = '\0'; } +#endif /* HAVE_BTRFS_SUPPORT */ + dflt: if (!root) { root = strdup("/");
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