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| author | David Teigland <teigland@redhat.com> | 2006-12-13 10:37:55 -0600 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2007-02-05 13:35:53 -0500 |
| commit | 9e971b715dcc3cd5f4383f2815aaa7e5853d1f7b (patch) | |
| tree | 9f8ad2435aef01e725c1b7bc94ef5b787ab9bdf2 | |
| parent | 38aa8b0c59c35d10d15ebf00ceee641f9ed7acba (diff) | |
| download | linux-9e971b715dcc3cd5f4383f2815aaa7e5853d1f7b.tar.bz2 | |
[DLM] add version check
Check if we receive a message from another lockspace member running a
version of the dlm with an incompatible inter-node message protocol.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| -rw-r--r-- | fs/dlm/rcom.c | 14 |
1 files changed, 11 insertions, 3 deletions
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c index 521ad9bb47b7..54fba9bd6740 100644 --- a/fs/dlm/rcom.c +++ b/fs/dlm/rcom.c @@ -82,8 +82,17 @@ static void make_config(struct dlm_ls *ls, struct rcom_config *rf) rf->rf_lsflags = ls->ls_exflags; } -static int check_config(struct dlm_ls *ls, struct rcom_config *rf, int nodeid) +static int check_config(struct dlm_ls *ls, struct dlm_rcom *rc, int nodeid) { + struct rcom_config *rf = (struct rcom_config *) rc->rc_buf; + + if ((rc->rc_header.h_version & 0xFFFF0000) != DLM_HEADER_MAJOR) { + log_error(ls, "version mismatch: %x nodeid %d: %x", + DLM_HEADER_MAJOR | DLM_HEADER_MINOR, nodeid, + rc->rc_header.h_version); + return -EINVAL; + } + if (rf->rf_lvblen != ls->ls_lvblen || rf->rf_lsflags != ls->ls_exflags) { log_error(ls, "config mismatch: %d,%x nodeid %d: %d,%x", @@ -145,8 +154,7 @@ int dlm_rcom_status(struct dlm_ls *ls, int nodeid) log_debug(ls, "remote node %d not ready", nodeid); rc->rc_result = 0; } else - error = check_config(ls, (struct rcom_config *) rc->rc_buf, - nodeid); + error = check_config(ls, rc, nodeid); /* the caller looks at rc_result for the remote recovery status */ out: return error; |