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btrfsprogs.14616
0004-btrfs-progs-Remove-btrfs_fs_info-new_fsid....
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File 0004-btrfs-progs-Remove-btrfs_fs_info-new_fsid.patch of Package btrfsprogs.14616
From 1a438fc67c6b389221f20e25c13acd195fa0656b Mon Sep 17 00:00:00 2001 From: Nikolay Borisov <nborisov@suse.com> Date: Thu, 11 Oct 2018 18:04:03 +0300 Subject: [PATCH 4/6] btrfs-progs: Remove btrfs_fs_info::new_fsid This member was used only by btrfstune when using the old method to change fsid. It's only an in-memory value with a very specific purpose so it makes no sense to pollute a generic structure such as btrfs_fs_info with it. Just remove it and pass it as a function argument where pertinent. No functional changes. Signed-off-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> --- btrfstune.c | 46 +++++++++++++++++++++------------------------- ctree.h | 1 - 2 files changed, 21 insertions(+), 26 deletions(-) diff --git a/btrfstune.c b/btrfstune.c index 500308b556fe..74a7c37195b0 100644 --- a/btrfstune.c +++ b/btrfstune.c @@ -201,15 +201,15 @@ static int set_super_incompat_flags(struct btrfs_root *root, u64 flags) return ret; } -static int change_buffer_header_uuid(struct extent_buffer *eb) +static int change_buffer_header_uuid(struct extent_buffer *eb, uuid_t new_fsid) { struct btrfs_fs_info *fs_info = eb->fs_info; int same_fsid = 1; int same_chunk_tree_uuid = 1; int ret; - same_fsid = !memcmp_extent_buffer(eb, fs_info->new_fsid, - btrfs_header_fsid(), BTRFS_FSID_SIZE); + same_fsid = !memcmp_extent_buffer(eb, new_fsid, btrfs_header_fsid(), + BTRFS_FSID_SIZE); same_chunk_tree_uuid = !memcmp_extent_buffer(eb, fs_info->new_chunk_tree_uuid, btrfs_header_chunk_tree_uuid(eb), @@ -217,7 +217,7 @@ static int change_buffer_header_uuid(struct extent_buffer *eb) if (same_fsid && same_chunk_tree_uuid) return 0; if (!same_fsid) - write_extent_buffer(eb, fs_info->new_fsid, btrfs_header_fsid(), + write_extent_buffer(eb, new_fsid, btrfs_header_fsid(), BTRFS_FSID_SIZE); if (!same_chunk_tree_uuid) write_extent_buffer(eb, fs_info->new_chunk_tree_uuid, @@ -228,7 +228,7 @@ static int change_buffer_header_uuid(struct extent_buffer *eb) return ret; } -static int change_extents_uuid(struct btrfs_fs_info *fs_info) +static int change_extents_uuid(struct btrfs_fs_info *fs_info, uuid_t new_fsid) { struct btrfs_root *root = fs_info->extent_root; struct btrfs_path path; @@ -267,7 +267,7 @@ static int change_extents_uuid(struct btrfs_fs_info *fs_info) ret = PTR_ERR(eb); goto out; } - ret = change_buffer_header_uuid(eb); + ret = change_buffer_header_uuid(eb, new_fsid); free_extent_buffer(eb); if (ret < 0) { error("failed to change uuid of tree block: %llu", @@ -289,27 +289,27 @@ static int change_extents_uuid(struct btrfs_fs_info *fs_info) return ret; } -static int change_device_uuid(struct extent_buffer *eb, int slot) +static int change_device_uuid(struct extent_buffer *eb, int slot, + uuid_t new_fsid) { struct btrfs_dev_item *di; struct btrfs_fs_info *fs_info = eb->fs_info; int ret = 0; di = btrfs_item_ptr(eb, slot, struct btrfs_dev_item); - if (!memcmp_extent_buffer(eb, fs_info->new_fsid, + if (!memcmp_extent_buffer(eb, new_fsid, (unsigned long)btrfs_device_fsid(di), BTRFS_FSID_SIZE)) return ret; - write_extent_buffer(eb, fs_info->new_fsid, - (unsigned long)btrfs_device_fsid(di), + write_extent_buffer(eb, new_fsid, (unsigned long)btrfs_device_fsid(di), BTRFS_FSID_SIZE); ret = write_tree_block(NULL, fs_info, eb); return ret; } -static int change_devices_uuid(struct btrfs_fs_info *fs_info) +static int change_devices_uuid(struct btrfs_fs_info *fs_info, uuid_t new_fsid) { struct btrfs_root *root = fs_info->chunk_root; struct btrfs_path path; @@ -327,7 +327,8 @@ static int change_devices_uuid(struct btrfs_fs_info *fs_info) if (key.type != BTRFS_DEV_ITEM_KEY || key.objectid != BTRFS_DEV_ITEMS_OBJECTID) goto next; - ret = change_device_uuid(path.nodes[0], path.slots[0]); + ret = change_device_uuid(path.nodes[0], path.slots[0], + new_fsid); if (ret < 0) goto out; next: @@ -344,7 +345,7 @@ static int change_devices_uuid(struct btrfs_fs_info *fs_info) return ret; } -static int change_fsid_prepare(struct btrfs_fs_info *fs_info) +static int change_fsid_prepare(struct btrfs_fs_info *fs_info, uuid_t new_fsid) { struct btrfs_root *tree_root = fs_info->tree_root; u64 flags = btrfs_super_flags(fs_info->super_copy); @@ -353,14 +354,13 @@ static int change_fsid_prepare(struct btrfs_fs_info *fs_info) flags |= BTRFS_SUPER_FLAG_CHANGING_FSID; btrfs_set_super_flags(fs_info->super_copy, flags); - memcpy(fs_info->super_copy->fsid, fs_info->new_fsid, BTRFS_FSID_SIZE); + memcpy(fs_info->super_copy->fsid, new_fsid, BTRFS_FSID_SIZE); ret = write_all_supers(fs_info); if (ret < 0) return ret; /* Also need to change the metadatauuid of the fs info */ - memcpy(fs_info->fs_devices->metadata_uuid, fs_info->new_fsid, - BTRFS_FSID_SIZE); + memcpy(fs_info->fs_devices->metadata_uuid, new_fsid, BTRFS_FSID_SIZE); /* also restore new chunk_tree_id into tree_root for restore */ write_extent_buffer(tree_root->node, fs_info->new_chunk_tree_uuid, @@ -414,7 +414,6 @@ static int change_uuid(struct btrfs_fs_info *fs_info, const char *new_fsid_str) uuid_generate(new_chunk_id); } - fs_info->new_fsid = new_fsid; fs_info->new_chunk_tree_uuid = new_chunk_id; memcpy(old_fsid, (const char*)fs_info->fs_devices->fsid, BTRFS_UUID_SIZE); @@ -425,13 +424,13 @@ static int change_uuid(struct btrfs_fs_info *fs_info, const char *new_fsid_str) printf("New fsid: %s\n", uuid_buf); /* Now we can begin fsid change */ printf("Set superblock flag CHANGING_FSID\n"); - ret = change_fsid_prepare(fs_info); + ret = change_fsid_prepare(fs_info, new_fsid); if (ret < 0) goto out; /* Change extents first */ printf("Change fsid in extents\n"); - ret = change_extents_uuid(fs_info); + ret = change_extents_uuid(fs_info, new_fsid); if (ret < 0) { error("failed to change UUID of metadata: %d", ret); goto out; @@ -439,17 +438,15 @@ static int change_uuid(struct btrfs_fs_info *fs_info, const char *new_fsid_str) /* Then devices */ printf("Change fsid on devices\n"); - ret = change_devices_uuid(fs_info); + ret = change_devices_uuid(fs_info, new_fsid); if (ret < 0) { error("failed to change UUID of devices: %d", ret); goto out; } /* Last, change fsid in super */ - memcpy(fs_info->fs_devices->fsid, fs_info->new_fsid, - BTRFS_FSID_SIZE); - memcpy(fs_info->super_copy->fsid, fs_info->new_fsid, - BTRFS_FSID_SIZE); + memcpy(fs_info->fs_devices->fsid, new_fsid, BTRFS_FSID_SIZE); + memcpy(fs_info->super_copy->fsid, new_fsid, BTRFS_FSID_SIZE); ret = write_all_supers(fs_info); if (ret < 0) goto out; @@ -457,7 +454,6 @@ static int change_uuid(struct btrfs_fs_info *fs_info, const char *new_fsid_str) /* Now fsid change is done */ printf("Clear superblock flag CHANGING_FSID\n"); ret = change_fsid_done(fs_info); - fs_info->new_fsid = NULL; fs_info->new_chunk_tree_uuid = NULL; printf("Fsid change finished\n"); out: diff --git a/ctree.h b/ctree.h index dec0dab1dde5..2abdea676b92 100644 --- a/ctree.h +++ b/ctree.h @@ -1093,7 +1093,6 @@ struct btrfs_block_group_cache { struct btrfs_device; struct btrfs_fs_devices; struct btrfs_fs_info { - u8 *new_fsid; u8 chunk_tree_uuid[BTRFS_UUID_SIZE]; u8 *new_chunk_tree_uuid; struct btrfs_root *fs_root; -- 2.17.1
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