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| author | Alexander Aring <aahringo@redhat.com> | 2020-11-02 20:04:17 -0500 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2020-11-10 12:14:20 -0600 |
| commit | 9f8f9c774ad10aa1c15952c36f580d7e3711a100 (patch) | |
| tree | 6627ac58e29ae5c1c08419e814a133eacd88e202 /fs/dlm/member.c | |
| parent | 5cbec208dc994de860ae72d3340bc54f14e71b39 (diff) | |
| download | linux-9f8f9c774ad10aa1c15952c36f580d7e3711a100.tar.gz | |
fs: dlm: define max send buffer
This patch will set the maximum transmit buffer size for rcom messages
with "names" to 4096 bytes. It's a leftover change of
commit 4798cbbfbd00 ("fs: dlm: rework receive handling"). Fact is that we
cannot allocate a contiguous transmit buffer length above of 4096 bytes.
It seems at some places the upper layer protocol will calculate according
to dlm_config.ci_buffer_size the possible payload of a dlm recovery
message. As compiler setting we will use now the maximum possible
message which dlm can send out. Commit 4e192ee68e5af ("fs: dlm: disallow
buffer size below default") disallow a buffer setting smaller than the
4096 bytes and above 4096 bytes is definitely wrong because we will then
write out of buffer space as we cannot allocate a contiguous buffer above
4096 bytes. The ci_buffer_size is still there to define the possible
maximum receive buffer size of a recvmsg() which should be at least the
maximum possible dlm message size.
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Diffstat (limited to 'fs/dlm/member.c')
| -rw-r--r-- | fs/dlm/member.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/dlm/member.c b/fs/dlm/member.c index 7ad83deb45053..ceef3f2074ffd 100644 --- a/fs/dlm/member.c +++ b/fs/dlm/member.c @@ -270,7 +270,7 @@ int dlm_slots_assign(struct dlm_ls *ls, int *num_slots, int *slots_size, log_slots(ls, gen, num, NULL, array, array_size); - max_slots = (dlm_config.ci_buffer_size - sizeof(struct dlm_rcom) - + max_slots = (LOWCOMMS_MAX_TX_BUFFER_LEN - sizeof(struct dlm_rcom) - sizeof(struct rcom_config)) / sizeof(struct rcom_slot); if (num > max_slots) { |