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ceph: add flags parameter to send_cap_msg

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Add a flags parameter to send_cap_msg, so we can request expedited
service from the MDS when we know we'll be waiting on the result.

Set that flag in the case of try_flush_caps. The callers of that
function generally wait synchronously on the result, so it's beneficial
to ask the server to expedite it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Yan, Zheng <zyan@redhat.com>
This commit is contained in:
Jeff Layton 2016-11-10 07:42:06 -05:00 committed by Ilya Dryomov
parent 43b2967330
commit 1e4ef0c633
2 changed files with 18 additions and 10 deletions
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25
fs/ceph/caps.c
View File

@ -996,6 +996,7 @@ struct cap_msg_args {
struct timespec atime, mtime, ctime;
int op, caps, wanted, dirty;
u32 seq, issue_seq, mseq, time_warp_seq;
u32 flags;
kuid_t uid;
kgid_t gid;
umode_t mode;
@ -1104,7 +1105,7 @@ static int send_cap_msg(struct cap_msg_args *arg)
ceph_encode_64(&p, 0);
/* Advisory flags (version 10) */
ceph_encode_32(&p, 0);
ceph_encode_32(&p, arg->flags);
ceph_con_send(&arg->session->s_con, msg);
return 0;
@ -1145,8 +1146,8 @@ void ceph_queue_caps_release(struct inode *inode)
* caller should hold snap_rwsem (read), s_mutex.
*/
static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
int op, int used, int want, int retain, int flushing,
u64 flush_tid, u64 oldest_flush_tid)
int op, bool sync, int used, int want, int retain,
int flushing, u64 flush_tid, u64 oldest_flush_tid)
__releases(cap->ci->i_ceph_lock)
{
struct ceph_inode_info *ci = cap->ci;
@ -1235,6 +1236,9 @@ static int __send_cap(struct ceph_mds_client *mdsc, struct ceph_cap *cap,
arg.mode = inode->i_mode;
arg.inline_data = ci->i_inline_version != CEPH_INLINE_NONE;
arg.flags = 0;
if (sync)
arg.flags |= CEPH_CLIENT_CAPS_SYNC;
spin_unlock(&ci->i_ceph_lock);
@ -1288,6 +1292,7 @@ static inline int __send_flush_snap(struct inode *inode,
arg.mode = capsnap->mode;
arg.inline_data = capsnap->inline_data;
arg.flags = 0;
return send_cap_msg(&arg);
}
@ -1912,9 +1917,9 @@ ack:
sent++;
/* __send_cap drops i_ceph_lock */
delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, cap_used,
want, retain, flushing,
flush_tid, oldest_flush_tid);
delayed += __send_cap(mdsc, cap, CEPH_CAP_OP_UPDATE, false,
cap_used, want, retain, flushing,
flush_tid, oldest_flush_tid);
goto retry; /* retake i_ceph_lock and restart our cap scan. */
}
@ -1978,9 +1983,9 @@ retry:
&flush_tid, &oldest_flush_tid);
/* __send_cap drops i_ceph_lock */
delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, used, want,
(cap->issued | cap->implemented),
flushing, flush_tid, oldest_flush_tid);
delayed = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH, true,
used, want, (cap->issued | cap->implemented),
flushing, flush_tid, oldest_flush_tid);
if (delayed) {
spin_lock(&ci->i_ceph_lock);
@ -2173,7 +2178,7 @@ static void __kick_flushing_caps(struct ceph_mds_client *mdsc,
inode, cap, cf->tid, ceph_cap_string(cf->caps));
ci->i_ceph_flags |= CEPH_I_NODELAY;
ret = __send_cap(mdsc, cap, CEPH_CAP_OP_FLUSH,
__ceph_caps_used(ci),
false, __ceph_caps_used(ci),
__ceph_caps_wanted(ci),
cap->issued | cap->implemented,
cf->caps, cf->tid, oldest_flush_tid);

3
include/linux/ceph/ceph_fs.h
View File

@ -653,6 +653,9 @@ enum {
extern const char *ceph_cap_op_name(int op);
/* flags field in client cap messages (version >= 10) */
#define CEPH_CLIENT_CAPS_SYNC (0x1)
/*
* caps message, used for capability callbacks, acks, requests, etc.
*/