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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@redhat.com>
This commit is contained in:
David Howells 2020-05-01 22:06:02 +01:00
parent 3c4c4075fc
commit f11a016a85
1 changed files with 4 additions and 1 deletions
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5
fs/afs/super.c
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@ -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 = {