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Date: Fri, 29 May 2020 23:02:57 +0100 From: David Howells <dhowells@...hat.com> To: linux-afs@...ts.infradead.org Cc: dhowells@...hat.com, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH 24/27] afs: Fix afs_statfs() to not let the values go below zero Fix afs_statfs() so that the value for f_bavail and f_bfree don't go "negative" if the number of blocks in use by a volume exceeds the max quota for that volume. Signed-off-by: David Howells <dhowells@...hat.com> --- fs/afs/super.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/fs/afs/super.c b/fs/afs/super.c index c77b11b31233..b552357b1d13 100644 --- a/fs/afs/super.c +++ b/fs/afs/super.c @@ -729,7 +729,10 @@ static void afs_get_volume_status_success(struct afs_operation *op) buf->f_blocks = vs->part_max_blocks; else buf->f_blocks = vs->max_quota; - buf->f_bavail = buf->f_bfree = buf->f_blocks - vs->blocks_in_use; + + if (buf->f_blocks > vs->blocks_in_use) + buf->f_bavail = buf->f_bfree = + buf->f_blocks - vs->blocks_in_use; } static const struct afs_operation_ops afs_get_volume_status_operation = {
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