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dlm: Avoid LVB truncation

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For lockspaces with an LVB length above 64 bytes, avoid truncating
the LVB while exchanging it with another node in the cluster.

Signed-off-by: Bart Van Assche <bvanassche@acm.org>
Signed-off-by: David Teigland <teigland@redhat.com>
This commit is contained in:
Bart Van Assche 2013-06-26 14:27:57 +02:00 committed by David Teigland
parent 696b3d8460
commit cfa805f6f1
1 changed files with 4 additions and 4 deletions
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8
fs/dlm/lock.c
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@ -2038,8 +2038,8 @@ static void set_lvb_lock_pc(struct dlm_rsb *r, struct dlm_lkb *lkb,
b = dlm_lvb_operations[lkb->lkb_grmode + 1][lkb->lkb_rqmode + 1];
if (b == 1) {
int len = receive_extralen(ms);
if (len > DLM_RESNAME_MAXLEN)
len = DLM_RESNAME_MAXLEN;
if (len > r->res_ls->ls_lvblen)
len = r->res_ls->ls_lvblen;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
lkb->lkb_lvbseq = ms->m_lvbseq;
}
@ -3893,8 +3893,8 @@ static int receive_lvb(struct dlm_ls *ls, struct dlm_lkb *lkb,
if (!lkb->lkb_lvbptr)
return -ENOMEM;
len = receive_extralen(ms);
if (len > DLM_RESNAME_MAXLEN)
len = DLM_RESNAME_MAXLEN;
if (len > ls->ls_lvblen)
len = ls->ls_lvblen;
memcpy(lkb->lkb_lvbptr, ms->m_extra, len);
}
return 0;