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libceph: introduce ceph_osdc_abort_requests()

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This will be used by the filesystem for "umount -f".

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov 2018-05-15 15:47:58 +02:00
parent 8c6286f1c6
commit 66850df585
2 changed files with 64 additions and 5 deletions
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2
include/linux/ceph/osd_client.h
View File

@ -347,6 +347,7 @@ struct ceph_osd_client {
struct rb_root linger_map_checks;
atomic_t num_requests;
atomic_t num_homeless;
int abort_err;
struct delayed_work timeout_work;
struct delayed_work osds_timeout_work;
#ifdef CONFIG_DEBUG_FS
@ -378,6 +379,7 @@ extern void ceph_osdc_handle_reply(struct ceph_osd_client *osdc,
extern void ceph_osdc_handle_map(struct ceph_osd_client *osdc,
struct ceph_msg *msg);
void ceph_osdc_update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb);
void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err);
extern void osd_req_op_init(struct ceph_osd_request *osd_req,
unsigned int which, u16 opcode, u32 flags);

67
net/ceph/osd_client.c
View File

@ -1058,6 +1058,38 @@ EXPORT_SYMBOL(ceph_osdc_new_request);
DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
/*
* Call @fn on each OSD request as long as @fn returns 0.
*/
static void for_each_request(struct ceph_osd_client *osdc,
int (*fn)(struct ceph_osd_request *req, void *arg),
void *arg)
{
struct rb_node *n, *p;
for (n = rb_first(&osdc->osds); n; n = rb_next(n)) {
struct ceph_osd *osd = rb_entry(n, struct ceph_osd, o_node);
for (p = rb_first(&osd->o_requests); p; ) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
p = rb_next(p);
if (fn(req, arg))
return;
}
}
for (p = rb_first(&osdc->homeless_osd.o_requests); p; ) {
struct ceph_osd_request *req =
rb_entry(p, struct ceph_osd_request, r_node);
p = rb_next(p);
if (fn(req, arg))
return;
}
}
static bool osd_homeless(struct ceph_osd *osd)
{
return osd->o_osd == CEPH_HOMELESS_OSD;
@ -2165,9 +2197,9 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
struct ceph_osd_client *osdc = req->r_osdc;
struct ceph_osd *osd;
enum calc_target_result ct_res;
int err = 0;
bool need_send = false;
bool promoted = false;
bool need_abort = false;
WARN_ON(req->r_tid);
dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
@ -2183,7 +2215,10 @@ again:
goto promote;
}
if (osdc->osdmap->epoch < osdc->epoch_barrier) {
if (osdc->abort_err) {
dout("req %p abort_err %d\n", req, osdc->abort_err);
err = osdc->abort_err;
} else if (osdc->osdmap->epoch < osdc->epoch_barrier) {
dout("req %p epoch %u barrier %u\n", req, osdc->osdmap->epoch,
osdc->epoch_barrier);
req->r_t.paused = true;
@ -2208,7 +2243,7 @@ again:
req->r_t.paused = true;
maybe_request_map(osdc);
if (req->r_abort_on_full)
need_abort = true;
err = -ENOSPC;
} else if (!osd_homeless(osd)) {
need_send = true;
} else {
@ -2225,8 +2260,8 @@ again:
link_request(osd, req);
if (need_send)
send_request(req);
else if (need_abort)
complete_request(req, -ENOSPC);
else if (err)
complete_request(req, err);
mutex_unlock(&osd->lock);
if (ct_res == CALC_TARGET_POOL_DNE)
@ -2340,6 +2375,28 @@ static void abort_request(struct ceph_osd_request *req, int err)
complete_request(req, err);
}
static int abort_fn(struct ceph_osd_request *req, void *arg)
{
int err = *(int *)arg;
abort_request(req, err);
return 0; /* continue iteration */
}
/*
* Abort all in-flight requests with @err and arrange for all future
* requests to be failed immediately.
*/
void ceph_osdc_abort_requests(struct ceph_osd_client *osdc, int err)
{
dout("%s osdc %p err %d\n", __func__, osdc, err);
down_write(&osdc->lock);
for_each_request(osdc, abort_fn, &err);
osdc->abort_err = err;
up_write(&osdc->lock);
}
EXPORT_SYMBOL(ceph_osdc_abort_requests);
static void update_epoch_barrier(struct ceph_osd_client *osdc, u32 eb)
{
if (likely(eb > osdc->epoch_barrier)) {