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btrfs-progs: fix XX_flags_to_str() to always end with '\0'

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[BUG]
We noticed 'btrfs check' outputs something like

  leaf 30408704 flags 0x0(P1逅?) backref revision 1

but we expected:

  leaf 30408704 flags 0x0() backref revision 1

[CAUSE]
Some XX_flags_to_str() failed to make sure the result string always ends
with '\0' in some case.

[FIX]
Reset the buffer at the beginnig.

Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Wang Yugui (wangyugui@e16-tech.com)
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Wang Yugui 2021-11-02 18:03:16 +08:00 committed by David Sterba
parent 4882a4f5fa
commit e9a7efb1b6
1 changed files with 3 additions and 0 deletions
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3
kernel-shared/print-tree.c
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@ -205,6 +205,7 @@ static void bg_flags_to_str(u64 flags, char *ret)
/* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
static void qgroup_flags_to_str(u64 flags, char *ret)
{
ret[0] = 0;
if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
strcpy(ret, "ON");
else
@ -412,6 +413,7 @@ static void extent_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
ret[0] = 0;
if (flags & BTRFS_EXTENT_FLAG_DATA) {
empty = 0;
strcpy(ret, "DATA");
@ -1196,6 +1198,7 @@ static void header_flags_to_str(u64 flags, char *ret)
{
int empty = 1;
ret[0] = 0;
if (flags & BTRFS_HEADER_FLAG_WRITTEN) {
empty = 0;
strcpy(ret, "WRITTEN");