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ceph: add a note explaining session reject error string

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error_string key in the metadata map of MClientSession message
is intended for humans, but unfortunately became part of the on-wire
format with the introduction of recover_session=clean mode in commit
131d7eb4fa ("ceph: auto reconnect after blacklisted").

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2020-09-15 21:11:30 +02:00
parent 1b05fae7f2
commit 4bb926e83f
1 changed files with 4 additions and 0 deletions
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4
fs/ceph/mds_client.c
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@ -3317,6 +3317,10 @@ static int __decode_session_metadata(void **p, void *end,
*p += len;
ceph_decode_32_safe(p, end, len, bad);
ceph_decode_need(p, end, len, bad);
/*
* Match "blocklisted (blacklisted)" from newer MDSes,
* or "blacklisted" from older MDSes.
*/
if (err_str && strnstr(*p, "blacklisted", len))
*blocklisted = true;
*p += len;