diff options
| author | Ilya Dryomov <idryomov@gmail.com> | 2015-05-15 12:02:17 +0300 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2015-06-25 11:49:29 +0300 |
| commit | a319bf56a617354e62cf5f774d2ca4e1a8a3bff3 (patch) | |
| tree | cf54ed20b02c8488a342f54fd573eb57df964a3c /fs/ceph/super.c | |
| parent | d50c97b566c5bbf990eff472e9feaa58fdebdd33 (diff) | |
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 'fs/ceph/super.c')
| -rw-r--r-- | fs/ceph/super.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 9a5350030af8..edeb83c43112 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -742,7 +742,7 @@ static struct dentry *open_root_dentry(struct ceph_fs_client *fsc, req->r_ino1.ino = CEPH_INO_ROOT; req->r_ino1.snap = CEPH_NOSNAP; req->r_started = started; - req->r_timeout = fsc->client->options->mount_timeout * HZ; + req->r_timeout = fsc->client->options->mount_timeout; req->r_args.getattr.mask = cpu_to_le32(CEPH_STAT_CAP_INODE); req->r_num_caps = 2; err = ceph_mdsc_do_request(mdsc, NULL, req); |