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ubifs: Correct the total block count by deducting journal reservation

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[ Upstream commit 84a2bee9c4 ]

Since commit e874dcde1c ("ubifs: Reserve one leb for each journal
head while doing budget"), available space is calulated by deducting
reservation for all journal heads. However, the total block count (
which is only used by statfs) is not updated yet, which will cause
the wrong displaying for used space(total - available).
Fix it by deducting reservation for all journal heads from total
block count.

Fixes: e874dcde1c ("ubifs: Reserve one leb for each journal head while doing budget")
Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Zhihao Cheng 2024-09-05 09:09:09 +08:00 committed by Greg Kroah-Hartman
parent 366fda649f
commit 7f0b3524a6
1 changed files with 3 additions and 3 deletions
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6
fs/ubifs/super.c
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@ -773,10 +773,10 @@ static void init_constants_master(struct ubifs_info *c)
* necessary to report something for the 'statfs()' call.
*
* Subtract the LEB reserved for GC, the LEB which is reserved for
* deletions, minimum LEBs for the index, and assume only one journal
* head is available.
* deletions, minimum LEBs for the index, the LEBs which are reserved
* for each journal head.
*/
tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt + 1;
tmp64 = c->main_lebs - 1 - 1 - MIN_INDEX_LEBS - c->jhead_cnt;
tmp64 *= (long long)c->leb_size - c->leb_overhead;
tmp64 = ubifs_reported_space(c, tmp64);
c->block_cnt = tmp64 >> UBIFS_BLOCK_SHIFT;