From 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Fri, 25 Mar 2016 03:53:42 -0300 Subject: Linux-libre 4.5-gnu --- fs/btrfs/super.c | 93 +++++++++++++++++++++++++++++++++++++++++++------------- 1 file changed, 72 insertions(+), 21 deletions(-) (limited to 'fs/btrfs/super.c') diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index fe609b81d..d41e09fe8 100644 --- a/fs/btrfs/super.c +++ b/fs/btrfs/super.c @@ -295,10 +295,11 @@ enum { Opt_nossd, Opt_ssd_spread, Opt_thread_pool, Opt_noacl, Opt_compress, Opt_compress_type, Opt_compress_force, Opt_compress_force_type, Opt_notreelog, Opt_ratio, Opt_flushoncommit, Opt_discard, - Opt_space_cache, Opt_clear_cache, Opt_user_subvol_rm_allowed, - Opt_enospc_debug, Opt_subvolrootid, Opt_defrag, Opt_inode_cache, - Opt_no_space_cache, Opt_recovery, Opt_skip_balance, - Opt_check_integrity, Opt_check_integrity_including_extent_data, + Opt_space_cache, Opt_space_cache_version, Opt_clear_cache, + Opt_user_subvol_rm_allowed, Opt_enospc_debug, Opt_subvolrootid, + Opt_defrag, Opt_inode_cache, Opt_no_space_cache, Opt_recovery, + Opt_skip_balance, Opt_check_integrity, + Opt_check_integrity_including_extent_data, Opt_check_integrity_print_mask, Opt_fatal_errors, Opt_rescan_uuid_tree, Opt_commit_interval, Opt_barrier, Opt_nodefrag, Opt_nodiscard, Opt_noenospc_debug, Opt_noflushoncommit, Opt_acl, Opt_datacow, @@ -309,7 +310,7 @@ enum { Opt_err, }; -static match_table_t tokens = { +static const match_table_t tokens = { {Opt_degraded, "degraded"}, {Opt_subvol, "subvol=%s"}, {Opt_subvolid, "subvolid=%s"}, @@ -340,6 +341,7 @@ static match_table_t tokens = { {Opt_discard, "discard"}, {Opt_nodiscard, "nodiscard"}, {Opt_space_cache, "space_cache"}, + {Opt_space_cache_version, "space_cache=%s"}, {Opt_clear_cache, "clear_cache"}, {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"}, {Opt_enospc_debug, "enospc_debug"}, @@ -381,9 +383,14 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) int ret = 0; char *compress_type; bool compress_force = false; + enum btrfs_compression_type saved_compress_type; + bool saved_compress_force; + int no_compress = 0; cache_gen = btrfs_super_cache_generation(root->fs_info->super_copy); - if (cache_gen) + if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE)) + btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE); + else if (cache_gen) btrfs_set_opt(info->mount_opt, SPACE_CACHE); if (!options) @@ -458,6 +465,10 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) /* Fallthrough */ case Opt_compress: case Opt_compress_type: + saved_compress_type = btrfs_test_opt(root, COMPRESS) ? + info->compress_type : BTRFS_COMPRESS_NONE; + saved_compress_force = + btrfs_test_opt(root, FORCE_COMPRESS); if (token == Opt_compress || token == Opt_compress_force || strcmp(args[0].from, "zlib") == 0) { @@ -466,6 +477,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_set_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATASUM); + no_compress = 0; } else if (strcmp(args[0].from, "lzo") == 0) { compress_type = "lzo"; info->compress_type = BTRFS_COMPRESS_LZO; @@ -473,25 +485,21 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) btrfs_clear_opt(info->mount_opt, NODATACOW); btrfs_clear_opt(info->mount_opt, NODATASUM); btrfs_set_fs_incompat(info, COMPRESS_LZO); + no_compress = 0; } else if (strncmp(args[0].from, "no", 2) == 0) { compress_type = "no"; btrfs_clear_opt(info->mount_opt, COMPRESS); btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); compress_force = false; + no_compress++; } else { ret = -EINVAL; goto out; } if (compress_force) { - btrfs_set_and_info(root, FORCE_COMPRESS, - "force %s compression", - compress_type); + btrfs_set_opt(info->mount_opt, FORCE_COMPRESS); } else { - if (!btrfs_test_opt(root, COMPRESS)) - btrfs_info(root->fs_info, - "btrfs: use %s compression", - compress_type); /* * If we remount from compress-force=xxx to * compress=xxx, we need clear FORCE_COMPRESS @@ -500,6 +508,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) */ btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); } + if ((btrfs_test_opt(root, COMPRESS) && + (info->compress_type != saved_compress_type || + compress_force != saved_compress_force)) || + (!btrfs_test_opt(root, COMPRESS) && + no_compress == 1)) { + btrfs_info(root->fs_info, + "%s %s compression", + (compress_force) ? "force" : "use", + compress_type); + } + compress_force = false; break; case Opt_ssd: btrfs_set_and_info(root, SSD, @@ -617,15 +636,35 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) "turning off discard"); break; case Opt_space_cache: - btrfs_set_and_info(root, SPACE_CACHE, - "enabling disk space caching"); + case Opt_space_cache_version: + if (token == Opt_space_cache || + strcmp(args[0].from, "v1") == 0) { + btrfs_clear_opt(root->fs_info->mount_opt, + FREE_SPACE_TREE); + btrfs_set_and_info(root, SPACE_CACHE, + "enabling disk space caching"); + } else if (strcmp(args[0].from, "v2") == 0) { + btrfs_clear_opt(root->fs_info->mount_opt, + SPACE_CACHE); + btrfs_set_and_info(root, FREE_SPACE_TREE, + "enabling free space tree"); + } else { + ret = -EINVAL; + goto out; + } break; case Opt_rescan_uuid_tree: btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE); break; case Opt_no_space_cache: - btrfs_clear_and_info(root, SPACE_CACHE, - "disabling disk space caching"); + if (btrfs_test_opt(root, SPACE_CACHE)) { + btrfs_clear_and_info(root, SPACE_CACHE, + "disabling disk space caching"); + } + if (btrfs_test_opt(root, FREE_SPACE_TREE)) { + btrfs_clear_and_info(root, FREE_SPACE_TREE, + "disabling free space tree"); + } break; case Opt_inode_cache: btrfs_set_pending_and_info(info, INODE_MAP_CACHE, @@ -754,8 +793,17 @@ int btrfs_parse_options(struct btrfs_root *root, char *options) } } out: + if (btrfs_fs_compat_ro(root->fs_info, FREE_SPACE_TREE) && + !btrfs_test_opt(root, FREE_SPACE_TREE) && + !btrfs_test_opt(root, CLEAR_CACHE)) { + btrfs_err(root->fs_info, "cannot disable free space tree"); + ret = -EINVAL; + + } if (!ret && btrfs_test_opt(root, SPACE_CACHE)) btrfs_info(root->fs_info, "disk space caching is enabled"); + if (!ret && btrfs_test_opt(root, FREE_SPACE_TREE)) + btrfs_info(root->fs_info, "using free space tree"); kfree(orig); return ret; } @@ -1162,6 +1210,8 @@ static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) seq_puts(seq, ",noacl"); if (btrfs_test_opt(root, SPACE_CACHE)) seq_puts(seq, ",space_cache"); + else if (btrfs_test_opt(root, FREE_SPACE_TREE)) + seq_puts(seq, ",space_cache=v2"); else seq_puts(seq, ",nospace_cache"); if (btrfs_test_opt(root, RESCAN_UUID_TREE)) @@ -1514,9 +1564,7 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags, if ((flags ^ s->s_flags) & MS_RDONLY) error = -EBUSY; } else { - char b[BDEVNAME_SIZE]; - - strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); + snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); btrfs_sb(s)->bdev_holder = fs_type; error = btrfs_fill_super(s, fs_devices, data, flags & MS_SILENT ? 1 : 0); @@ -1865,7 +1913,7 @@ static int btrfs_calc_avail_data_space(struct btrfs_root *root, u64 *free_bytes) * btrfs starts at an offset of at least 1MB when doing chunk * allocation. */ - skip_space = 1024 * 1024; + skip_space = SZ_1M; /* user can set the offset in fs_info->alloc_start. */ if (fs_info->alloc_start && @@ -2249,6 +2297,9 @@ static int btrfs_run_sanity_tests(void) if (ret) goto out; ret = btrfs_test_qgroups(); + if (ret) + goto out; + ret = btrfs_test_free_space_tree(); out: btrfs_destroy_test_fs(); return ret; -- cgit v1.2.3-54-g00ecf