* [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree()
@ 2016-08-25 5:20 Wang Xiaoguang
2016-08-25 5:21 ` [PATCH 2/3] btrfs-progs: check: make low memory mode support partially dropped snapshots Wang Xiaoguang
` (2 more replies)
0 siblings, 3 replies; 7+ messages in thread
From: Wang Xiaoguang @ 2016-08-25 5:20 UTC (permalink / raw)
To: linux-btrfs; +Cc: dsterba
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
---
cmds-check.c | 5 -----
1 file changed, 5 deletions(-)
diff --git a/cmds-check.c b/cmds-check.c
index 0ddfd24..1cd0421 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -3737,7 +3737,6 @@ static int check_fs_root(struct btrfs_root *root,
path.slots[level] = 0;
} else {
struct btrfs_key key;
- struct btrfs_disk_key found_key;
btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
level = root_item->drop_level;
@@ -3745,10 +3744,6 @@ static int check_fs_root(struct btrfs_root *root,
wret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
if (wret < 0)
goto skip_walking;
- btrfs_node_key(path.nodes[level], &found_key,
- path.slots[level]);
- WARN_ON(memcmp(&found_key, &root_item->drop_progress,
- sizeof(found_key)));
}
while (1) {
--
2.9.0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 2/3] btrfs-progs: check: make low memory mode support partially dropped snapshots
2016-08-25 5:20 [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() Wang Xiaoguang
@ 2016-08-25 5:21 ` Wang Xiaoguang
2016-09-09 15:32 ` David Sterba
2016-08-25 5:21 ` [PATCH 3/3] btrfs-progs: tests: add 021-partially-dropped-snapshot-case Wang Xiaoguang
2016-08-29 16:22 ` [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() David Sterba
2 siblings, 1 reply; 7+ messages in thread
From: Wang Xiaoguang @ 2016-08-25 5:21 UTC (permalink / raw)
To: linux-btrfs; +Cc: dsterba
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
---
cmds-check.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/cmds-check.c b/cmds-check.c
index 1cd0421..bce586c 100644
--- a/cmds-check.c
+++ b/cmds-check.c
@@ -9016,9 +9016,10 @@ static int check_tree_block_backref(struct btrfs_fs_info *fs_info, u64 root_id,
free_extent_buffer(eb);
btrfs_init_path(&path);
+ path.lowest_level = level;
/* Search with the first key, to ensure we can reach it */
ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
- if (ret) {
+ if (ret < 0) {
err |= REFERENCER_MISSING;
goto release_out;
}
@@ -9901,6 +9902,8 @@ static int traverse_tree_block(struct btrfs_root *root,
struct extent_buffer *node)
{
struct extent_buffer *eb;
+ struct btrfs_key key;
+ struct btrfs_key drop_key;
int level;
u64 nr;
int i;
@@ -9946,6 +9949,7 @@ static int traverse_tree_block(struct btrfs_root *root,
}
nr = btrfs_header_nritems(node);
+ btrfs_disk_key_to_cpu(&drop_key, &root->root_item.drop_progress);
btree_space_waste += (BTRFS_NODEPTRS_PER_BLOCK(root) - nr) *
sizeof(struct btrfs_key_ptr);
@@ -9953,6 +9957,11 @@ static int traverse_tree_block(struct btrfs_root *root,
for (i = 0; i < nr; i++) {
u64 blocknr = btrfs_node_blockptr(node, i);
+ btrfs_node_key_to_cpu(node, &key, i);
+ if (level == root->root_item.drop_level &&
+ is_dropped_key(&key, &drop_key))
+ continue;
+
/*
* As a btrfs tree has most 8 levels (0..7), so it's quite safe
* to call the function itself.
--
2.9.0
^ permalink raw reply related [flat|nested] 7+ messages in thread* [PATCH 3/3] btrfs-progs: tests: add 021-partially-dropped-snapshot-case
2016-08-25 5:20 [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() Wang Xiaoguang
2016-08-25 5:21 ` [PATCH 2/3] btrfs-progs: check: make low memory mode support partially dropped snapshots Wang Xiaoguang
@ 2016-08-25 5:21 ` Wang Xiaoguang
2016-08-29 16:22 ` [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() David Sterba
2 siblings, 0 replies; 7+ messages in thread
From: Wang Xiaoguang @ 2016-08-25 5:21 UTC (permalink / raw)
To: linux-btrfs; +Cc: dsterba
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
---
.../dropped-snapshot.img | Bin 0 -> 24576 bytes
.../021-partially-dropped-snapshot-case/test.sh | 18 ++++++++++++++++++
2 files changed, 18 insertions(+)
create mode 100644 tests/fsck-tests/021-partially-dropped-snapshot-case/dropped-snapshot.img
create mode 100755 tests/fsck-tests/021-partially-dropped-snapshot-case/test.sh
diff --git a/tests/fsck-tests/021-partially-dropped-snapshot-case/dropped-snapshot.img b/tests/fsck-tests/021-partially-dropped-snapshot-case/dropped-snapshot.img
new file mode 100644
index 0000000000000000000000000000000000000000..345ef41980d04f988ff1eb44e14c3cf3eaa34454
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HcmV?d00001
diff --git a/tests/fsck-tests/021-partially-dropped-snapshot-case/test.sh b/tests/fsck-tests/021-partially-dropped-snapshot-case/test.sh
new file mode 100755
index 0000000..eb8d884
--- /dev/null
+++ b/tests/fsck-tests/021-partially-dropped-snapshot-case/test.sh
@@ -0,0 +1,18 @@
+#!/bin/bash
+# confirm whether btrfsck supports to check a partially dropped snapshot
+
+source $TOP/tests/common
+
+check_prereq btrfs
+
+for img in *.img
+do
+ image=$(extract_image $img)
+ run_check_stdout $TOP/btrfs check "$image" 2>&1 |
+ grep -q "Errors found in extent allocation tree or chunk allocation"
+ if [ $? -eq 0 ]; then
+ rm -f "$image"
+ _fail "unexpected error occurred when checking $img"
+ fi
+ rm -f "$image"
+done
--
2.9.0
^ permalink raw reply related [flat|nested] 7+ messages in thread* Re: [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree()
2016-08-25 5:20 [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() Wang Xiaoguang
2016-08-25 5:21 ` [PATCH 2/3] btrfs-progs: check: make low memory mode support partially dropped snapshots Wang Xiaoguang
2016-08-25 5:21 ` [PATCH 3/3] btrfs-progs: tests: add 021-partially-dropped-snapshot-case Wang Xiaoguang
@ 2016-08-29 16:22 ` David Sterba
2016-09-09 15:36 ` David Sterba
2016-09-12 7:01 ` Wang Xiaoguang
2 siblings, 2 replies; 7+ messages in thread
From: David Sterba @ 2016-08-29 16:22 UTC (permalink / raw)
To: Wang Xiaoguang; +Cc: linux-btrfs, dsterba
On Thu, Aug 25, 2016 at 01:20:59PM +0800, Wang Xiaoguang wrote:
> Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
> ---
> cmds-check.c | 5 -----
> 1 file changed, 5 deletions(-)
>
> diff --git a/cmds-check.c b/cmds-check.c
> index 0ddfd24..1cd0421 100644
> --- a/cmds-check.c
> +++ b/cmds-check.c
> @@ -3737,7 +3737,6 @@ static int check_fs_root(struct btrfs_root *root,
> path.slots[level] = 0;
> } else {
> struct btrfs_key key;
> - struct btrfs_disk_key found_key;
>
> btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
> level = root_item->drop_level;
> @@ -3745,10 +3744,6 @@ static int check_fs_root(struct btrfs_root *root,
> wret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
> if (wret < 0)
> goto skip_walking;
> - btrfs_node_key(path.nodes[level], &found_key,
> - path.slots[level]);
> - WARN_ON(memcmp(&found_key, &root_item->drop_progress,
> - sizeof(found_key)));
It's not unused, the WARN_ON is an if in disguise, ane memcmp does the
check, am I missing something here?
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree()
2016-08-29 16:22 ` [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() David Sterba
@ 2016-09-09 15:36 ` David Sterba
2016-09-12 7:01 ` Wang Xiaoguang
1 sibling, 0 replies; 7+ messages in thread
From: David Sterba @ 2016-09-09 15:36 UTC (permalink / raw)
To: dsterba, Wang Xiaoguang, linux-btrfs
On Mon, Aug 29, 2016 at 06:22:17PM +0200, David Sterba wrote:
> On Thu, Aug 25, 2016 at 01:20:59PM +0800, Wang Xiaoguang wrote:
> > Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
> > ---
> > cmds-check.c | 5 -----
> > 1 file changed, 5 deletions(-)
> >
> > diff --git a/cmds-check.c b/cmds-check.c
> > index 0ddfd24..1cd0421 100644
> > --- a/cmds-check.c
> > +++ b/cmds-check.c
> > @@ -3737,7 +3737,6 @@ static int check_fs_root(struct btrfs_root *root,
> > path.slots[level] = 0;
> > } else {
> > struct btrfs_key key;
> > - struct btrfs_disk_key found_key;
> >
> > btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
> > level = root_item->drop_level;
> > @@ -3745,10 +3744,6 @@ static int check_fs_root(struct btrfs_root *root,
> > wret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
> > if (wret < 0)
> > goto skip_walking;
> > - btrfs_node_key(path.nodes[level], &found_key,
> > - path.slots[level]);
> > - WARN_ON(memcmp(&found_key, &root_item->drop_progress,
> > - sizeof(found_key)));
>
> It's not unused, the WARN_ON is an if in disguise, ane memcmp does the
> check, am I missing something here?
So, the warning should stay, please replace it with an if and a message,
unless there are other reasons to drop the check completely.
^ permalink raw reply [flat|nested] 7+ messages in thread* Re: [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree()
2016-08-29 16:22 ` [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() David Sterba
2016-09-09 15:36 ` David Sterba
@ 2016-09-12 7:01 ` Wang Xiaoguang
1 sibling, 0 replies; 7+ messages in thread
From: Wang Xiaoguang @ 2016-09-12 7:01 UTC (permalink / raw)
To: dsterba, linux-btrfs
Hi,
On 08/30/2016 12:22 AM, David Sterba wrote:
> On Thu, Aug 25, 2016 at 01:20:59PM +0800, Wang Xiaoguang wrote:
>> Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
>> ---
>> cmds-check.c | 5 -----
>> 1 file changed, 5 deletions(-)
>>
>> diff --git a/cmds-check.c b/cmds-check.c
>> index 0ddfd24..1cd0421 100644
>> --- a/cmds-check.c
>> +++ b/cmds-check.c
>> @@ -3737,7 +3737,6 @@ static int check_fs_root(struct btrfs_root *root,
>> path.slots[level] = 0;
>> } else {
>> struct btrfs_key key;
>> - struct btrfs_disk_key found_key;
>>
>> btrfs_disk_key_to_cpu(&key, &root_item->drop_progress);
>> level = root_item->drop_level;
>> @@ -3745,10 +3744,6 @@ static int check_fs_root(struct btrfs_root *root,
>> wret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
>> if (wret < 0)
>> goto skip_walking;
>> - btrfs_node_key(path.nodes[level], &found_key,
>> - path.slots[level]);
>> - WARN_ON(memcmp(&found_key, &root_item->drop_progress,
>> - sizeof(found_key)));
> It's not unused, the WARN_ON is an if in disguise, ane memcmp does the
> check, am I missing something here?
No, you're right.
I mistakenly took the memcmp() as memcpy(), sorry.
Regards,
Xiaoguang Wang
>
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2016-09-12 7:06 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
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2016-08-25 5:20 [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() Wang Xiaoguang
2016-08-25 5:21 ` [PATCH 2/3] btrfs-progs: check: make low memory mode support partially dropped snapshots Wang Xiaoguang
2016-09-09 15:32 ` David Sterba
2016-08-25 5:21 ` [PATCH 3/3] btrfs-progs: tests: add 021-partially-dropped-snapshot-case Wang Xiaoguang
2016-08-29 16:22 ` [PATCH 1/3] btrfs-progs: check: remove unused found_key variable in walk_down_tree() David Sterba
2016-09-09 15:36 ` David Sterba
2016-09-12 7:01 ` Wang Xiaoguang
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