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| author | Jeff Layton <jlayton@kernel.org> | 2019-11-20 12:00:59 -0500 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2019-12-09 20:55:10 +0100 |
| commit | 3a3430affce5de301fc8e6e50fa3543d7597820e (patch) | |
| tree | bdabd16c0708b46096b4301e5a7a206311adb396 /fs/ceph/debugfs.c | |
| parent | ad8c28a9eb81ca90fda29f48cfb4d19305943737 (diff) | |
| download | lwn-3a3430affce5de301fc8e6e50fa3543d7597820e.tar.gz lwn-3a3430affce5de301fc8e6e50fa3543d7597820e.zip | |
ceph: show tasks waiting on caps in debugfs caps file
Add some visibility of tasks that are waiting for caps to the "caps"
debugfs file. Display the tgid of the waiting task, inode number, and
the caps the task needs and wants.
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/debugfs.c')
| -rw-r--r-- | fs/ceph/debugfs.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c index facb387c2735..c281f32b54f7 100644 --- a/fs/ceph/debugfs.c +++ b/fs/ceph/debugfs.c @@ -139,6 +139,7 @@ static int caps_show(struct seq_file *s, void *p) struct ceph_fs_client *fsc = s->private; struct ceph_mds_client *mdsc = fsc->mdsc; int total, avail, used, reserved, min, i; + struct cap_wait *cw; ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min); seq_printf(s, "total\t\t%d\n" @@ -166,6 +167,18 @@ static int caps_show(struct seq_file *s, void *p) } mutex_unlock(&mdsc->mutex); + seq_printf(s, "\n\nWaiters:\n--------\n"); + seq_printf(s, "tgid ino need want\n"); + seq_printf(s, "-----------------------------------------------------\n"); + + spin_lock(&mdsc->caps_list_lock); + list_for_each_entry(cw, &mdsc->cap_wait_list, list) { + seq_printf(s, "%-13d0x%-17lx%-17s%-17s\n", cw->tgid, cw->ino, + ceph_cap_string(cw->need), + ceph_cap_string(cw->want)); + } + spin_unlock(&mdsc->caps_list_lock); + return 0; } |