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| author | Ilya Dryomov <idryomov@gmail.com> | 2015-05-15 11:02:17 +0200 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-06-25 10:49:29 +0200 |
| commit | a319bf56a617354e62cf5f774d2ca4e1a8a3bff3 (patch) | |
| tree | cf54ed20b02c8488a342f54fd573eb57df964a3c /drivers/block | |
| parent | libceph: nuke time_sub() (diff) | |
| download | linux-a319bf56a617354e62cf5f774d2ca4e1a8a3bff3.tar.xz linux-a319bf56a617354e62cf5f774d2ca4e1a8a3bff3.zip | |
libceph: store timeouts in jiffies, verify user input
There are currently three libceph-level timeouts that the user can
specify on mount: mount_timeout, osd_idle_ttl and osdkeepalive. All of
these are in seconds and no checking is done on user input: negative
values are accepted, we multiply them all by HZ which may or may not
overflow, arbitrarily large jiffies then get added together, etc.
There is also a bug in the way mount_timeout=0 is handled. It's
supposed to mean "infinite timeout", but that's not how wait.h APIs
treat it and so __ceph_open_session() for example will busy loop
without much chance of being interrupted if none of ceph-mons are
there.
Fix all this by verifying user input, storing timeouts capped by
msecs_to_jiffies() in jiffies and using the new ceph_timeout_jiffies()
helper for all user-specified waits to handle infinite timeouts
correctly.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Diffstat (limited to 'drivers/block')
| -rw-r--r-- | drivers/block/rbd.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c index 349115ae3bc2..992683b6b299 100644 --- a/drivers/block/rbd.c +++ b/drivers/block/rbd.c @@ -4963,8 +4963,8 @@ out_err: */ static int rbd_add_get_pool_id(struct rbd_client *rbdc, const char *pool_name) { + struct ceph_options *opts = rbdc->client->options; u64 newest_epoch; - unsigned long timeout = rbdc->client->options->mount_timeout * HZ; int tries = 0; int ret; @@ -4979,7 +4979,8 @@ again: if (rbdc->client->osdc.osdmap->epoch < newest_epoch) { ceph_monc_request_next_osdmap(&rbdc->client->monc); (void) ceph_monc_wait_osdmap(&rbdc->client->monc, - newest_epoch, timeout); + newest_epoch, + opts->mount_timeout); goto again; } else { /* the osdmap we have is new enough */ |