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Groups > linux.kernel > #1467124
| From | Willy Tarreau <w@1wt.eu> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 3.10 044/180] libceph: apply new_state before new_up_client on incrementals |
| Date | 2016-08-21 18:00 +0200 |
| Message-ID | <s8Dkf-2ft-57@gated-at.bofh.it> (permalink) |
| References | <s8D0R-26R-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Ilya Dryomov <idryomov@gmail.com>
commit 930c532869774ebf8af9efe9484c597f896a7d46 upstream.
Currently, osd_weight and osd_state fields are updated in the encoding
order. This is wrong, because an incremental map may look like e.g.
new_up_client: { osd=6, addr=... } # set osd_state and addr
new_state: { osd=6, xorstate=EXISTS } # clear osd_state
Suppose osd6's current osd_state is EXISTS (i.e. osd6 is down). After
applying new_up_client, osd_state is changed to EXISTS | UP. Carrying
on with the new_state update, we flip EXISTS and leave osd6 in a weird
"!EXISTS but UP" state. A non-existent OSD is considered down by the
mapping code
2087 for (i = 0; i < pg->pg_temp.len; i++) {
2088 if (ceph_osd_is_down(osdmap, pg->pg_temp.osds[i])) {
2089 if (ceph_can_shift_osds(pi))
2090 continue;
2091
2092 temp->osds[temp->size++] = CRUSH_ITEM_NONE;
and so requests get directed to the second OSD in the set instead of
the first, resulting in OSD-side errors like:
[WRN] : client.4239 192.168.122.21:0/2444980242 misdirected client.4239.1:2827 pg 2.5df899f2 to osd.4 not [1,4,6] in e680/680
and hung rbds on the client:
[ 493.566367] rbd: rbd0: write 400000 at 11cc00000 (0)
[ 493.566805] rbd: rbd0: result -6 xferred 400000
[ 493.567011] blk_update_request: I/O error, dev rbd0, sector 9330688
The fix is to decouple application from the decoding and:
- apply new_weight first
- apply new_state before new_up_client
- twiddle osd_state flags if marking in
- clear out some of the state if osd is destroyed
Fixes: http://tracker.ceph.com/issues/14901
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Josh Durgin <jdurgin@redhat.com>
[idryomov@gmail.com: backport to 3.10-3.14: strip primary-affinity]
Signed-off-by: Willy Tarreau <w@1wt.eu>
---
net/ceph/osdmap.c | 152 ++++++++++++++++++++++++++++++++++++++----------------
1 file changed, 108 insertions(+), 44 deletions(-)
diff --git a/net/ceph/osdmap.c b/net/ceph/osdmap.c
index 7ec4e05..c1de8d4 100644
--- a/net/ceph/osdmap.c
+++ b/net/ceph/osdmap.c
@@ -798,6 +798,110 @@ bad:
}
/*
+ * Encoding order is (new_up_client, new_state, new_weight). Need to
+ * apply in the (new_weight, new_state, new_up_client) order, because
+ * an incremental map may look like e.g.
+ *
+ * new_up_client: { osd=6, addr=... } # set osd_state and addr
+ * new_state: { osd=6, xorstate=EXISTS } # clear osd_state
+ */
+static int decode_new_up_state_weight(void **p, void *end,
+ struct ceph_osdmap *map)
+{
+ void *new_up_client;
+ void *new_state;
+ void *new_weight_end;
+ u32 len;
+
+ new_up_client = *p;
+ ceph_decode_32_safe(p, end, len, e_inval);
+ len *= sizeof(u32) + sizeof(struct ceph_entity_addr);
+ ceph_decode_need(p, end, len, e_inval);
+ *p += len;
+
+ new_state = *p;
+ ceph_decode_32_safe(p, end, len, e_inval);
+ len *= sizeof(u32) + sizeof(u8);
+ ceph_decode_need(p, end, len, e_inval);
+ *p += len;
+
+ /* new_weight */
+ ceph_decode_32_safe(p, end, len, e_inval);
+ while (len--) {
+ s32 osd;
+ u32 w;
+
+ ceph_decode_need(p, end, 2*sizeof(u32), e_inval);
+ osd = ceph_decode_32(p);
+ w = ceph_decode_32(p);
+ BUG_ON(osd >= map->max_osd);
+ pr_info("osd%d weight 0x%x %s\n", osd, w,
+ w == CEPH_OSD_IN ? "(in)" :
+ (w == CEPH_OSD_OUT ? "(out)" : ""));
+ map->osd_weight[osd] = w;
+
+ /*
+ * If we are marking in, set the EXISTS, and clear the
+ * AUTOOUT and NEW bits.
+ */
+ if (w) {
+ map->osd_state[osd] |= CEPH_OSD_EXISTS;
+ map->osd_state[osd] &= ~(CEPH_OSD_AUTOOUT |
+ CEPH_OSD_NEW);
+ }
+ }
+ new_weight_end = *p;
+
+ /* new_state (up/down) */
+ *p = new_state;
+ len = ceph_decode_32(p);
+ while (len--) {
+ s32 osd;
+ u8 xorstate;
+
+ osd = ceph_decode_32(p);
+ xorstate = ceph_decode_8(p);
+ if (xorstate == 0)
+ xorstate = CEPH_OSD_UP;
+ BUG_ON(osd >= map->max_osd);
+ if ((map->osd_state[osd] & CEPH_OSD_UP) &&
+ (xorstate & CEPH_OSD_UP))
+ pr_info("osd%d down\n", osd);
+ if ((map->osd_state[osd] & CEPH_OSD_EXISTS) &&
+ (xorstate & CEPH_OSD_EXISTS)) {
+ pr_info("osd%d does not exist\n", osd);
+ map->osd_weight[osd] = CEPH_OSD_IN;
+ memset(map->osd_addr + osd, 0, sizeof(*map->osd_addr));
+ map->osd_state[osd] = 0;
+ } else {
+ map->osd_state[osd] ^= xorstate;
+ }
+ }
+
+ /* new_up_client */
+ *p = new_up_client;
+ len = ceph_decode_32(p);
+ while (len--) {
+ s32 osd;
+ struct ceph_entity_addr addr;
+
+ osd = ceph_decode_32(p);
+ ceph_decode_copy(p, &addr, sizeof(addr));
+ ceph_decode_addr(&addr);
+ BUG_ON(osd >= map->max_osd);
+ pr_info("osd%d up\n", osd);
+ map->osd_state[osd] |= CEPH_OSD_EXISTS | CEPH_OSD_UP;
+ map->osd_addr[osd] = addr;
+ }
+
+ *p = new_weight_end;
+ return 0;
+
+e_inval:
+ return -EINVAL;
+}
+
+/*
* decode and apply an incremental map update.
*/
struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
@@ -912,50 +1016,10 @@ struct ceph_osdmap *osdmap_apply_incremental(void **p, void *end,
__remove_pg_pool(&map->pg_pools, pi);
}
- /* new_up */
- err = -EINVAL;
- ceph_decode_32_safe(p, end, len, bad);
- while (len--) {
- u32 osd;
- struct ceph_entity_addr addr;
- ceph_decode_32_safe(p, end, osd, bad);
- ceph_decode_copy_safe(p, end, &addr, sizeof(addr), bad);
- ceph_decode_addr(&addr);
- pr_info("osd%d up\n", osd);
- BUG_ON(osd >= map->max_osd);
- map->osd_state[osd] |= CEPH_OSD_UP;
- map->osd_addr[osd] = addr;
- }
-
- /* new_state */
- ceph_decode_32_safe(p, end, len, bad);
- while (len--) {
- u32 osd;
- u8 xorstate;
- ceph_decode_32_safe(p, end, osd, bad);
- xorstate = **(u8 **)p;
- (*p)++; /* clean flag */
- if (xorstate == 0)
- xorstate = CEPH_OSD_UP;
- if (xorstate & CEPH_OSD_UP)
- pr_info("osd%d down\n", osd);
- if (osd < map->max_osd)
- map->osd_state[osd] ^= xorstate;
- }
-
- /* new_weight */
- ceph_decode_32_safe(p, end, len, bad);
- while (len--) {
- u32 osd, off;
- ceph_decode_need(p, end, sizeof(u32)*2, bad);
- osd = ceph_decode_32(p);
- off = ceph_decode_32(p);
- pr_info("osd%d weight 0x%x %s\n", osd, off,
- off == CEPH_OSD_IN ? "(in)" :
- (off == CEPH_OSD_OUT ? "(out)" : ""));
- if (osd < map->max_osd)
- map->osd_weight[osd] = off;
- }
+ /* new_up_client, new_state, new_weight */
+ err = decode_new_up_state_weight(p, end, map);
+ if (err)
+ goto bad;
/* new_pg_temp */
ceph_decode_32_safe(p, end, len, bad);
--
2.8.0.rc2.1.gbe9624a
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Re: [PATCH 3.10 090/180] xfs: xfs_iflush_cluster fails to abort on error Willy Tarreau <w@1wt.eu> - 2016-08-22 13:10 +0200
[PATCH 3.10 003/180] netfilter: x_tables: validate e->target_offset early Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 025/180] perf/x86: Fix undefined shift on 32-bit kernels Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 164/180] cifs: Check for existing directory when opening file with O_CREAT Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 091/180] xfs: fix inode validity check in xfs_iflush_cluster Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 038/180] pipe: limit the per-user amount of pages allocated in pipes Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 118/180] UBIFS: Implement ->migratepage() Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 175/180] HID: hid-input: Add parentheses to quell gcc warning Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 065/180] PCI: Disable all BAR sizing for devices with non-compliant BARs Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 144/180] ecryptfs: don't allow mmap when the lower fs doesn't support it Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 043/180] HID: hiddev: validate num_values for HIDIOCGUSAGES, HIDIOCSUSAGES commands Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 067/180] powerpc/book3s64: Fix branching to OOL handlers in relocatable kernel Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 157/180] fuse: fix wrong assignment of ->flags in fuse_send_init() Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 023/180] netfilter: x_tables: introduce and use xt_copy_counters_from_user Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 011/180] netfilter: x_tables: add compat version of xt_check_entry_offsets Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 122/180] base: make module_create_drivers_dir race-free Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 087/180] ext4: short-cut orphan cleanup on error Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 125/180] iio: accel: kxsd9: fix the usage of spi_w8r8() Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 070/180] powerpc/pseries/eeh: Handle RTAS delay requests in configure_bridge Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 107/180] mac80211: mesh: flush mesh paths unconditionally Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 138/180] xen/acpi: allow xen-acpi-processor driver to load on Xen 4.7 Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 119/180] cdc_ncm: workaround for EM7455 "silent" data interface Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 106/180] net: alx: Work around the DMA RX overflow issue Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 032/180] USB: EHCI: declare hostpc register as zero-length array Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 031/180] USB: fix up faulty backports Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 150/180] ipr: Clear interrupt on croc/crocodile when running with LSI Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 041/180] mm: migrate dirty page without clear_page_dirty_for_io etc Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 116/180] NFS: Fix another OPEN_DOWNGRADE bug Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 069/180] powerpc: Use privileged SPR number for MMCR2 Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 085/180] ext4: check for extents that wrap around Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 072/180] powerpc/pseries: Fix PCI config address for DDW Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 110/180] IB/security: Restrict use of the write() interface Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 133/180] ALSA: timer: Fix leak in events via snd_timer_user_ccallback Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 123/180] iio: Fix error handling in iio_trigger_attach_poll_func Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 172/180] module: Invalidate signatures on force-loaded modules Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 160/180] hp-wmi: Fix wifi cannot be hard-unblocked Willy Tarreau <w@1wt.eu> - 2016-08-21 18:10 +0200
[PATCH 3.10 004/180] netfilter: x_tables: make sure e->next_offset covers remaining blob size Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 042/180] printk: do cond_resched() between lines while outputting to consoles Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 001/180] X.509: remove possible code fragility: enumeration values not handled Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 097/180] ecryptfs: forbid opening files without mmap handler Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 021/180] netfilter: x_tables: do compat validation via translate_table Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 030/180] USB: usbfs: fix potential infoleak in devio Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 040/180] KEYS: potential uninitialized variable Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 034/180] usb: musb: Stop bulk endpoint while queue is rotated Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 005/180] netfilter: x_tables: fix unconditional helper Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 014/180] netfilter: x_tables: validate all offsets and sizes in a rule Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
[PATCH 3.10 022/180] Revert "netfilter: ensure number of counters is >0 in do_replace()" Willy Tarreau <w@1wt.eu> - 2016-08-21 18:20 +0200
csiph-web