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Diffstat (limited to 'fs/ceph/mdsmap.c')
-rw-r--r--fs/ceph/mdsmap.c163
1 files changed, 157 insertions, 6 deletions
diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c
index 8c3591a7fbae..5454e2327a5f 100644
--- a/fs/ceph/mdsmap.c
+++ b/fs/ceph/mdsmap.c
@@ -42,6 +42,60 @@ int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
return i;
}
+#define __decode_and_drop_type(p, end, type, bad) \
+ do { \
+ if (*p + sizeof(type) > end) \
+ goto bad; \
+ *p += sizeof(type); \
+ } while (0)
+
+#define __decode_and_drop_set(p, end, type, bad) \
+ do { \
+ u32 n; \
+ size_t need; \
+ ceph_decode_32_safe(p, end, n, bad); \
+ need = sizeof(type) * n; \
+ ceph_decode_need(p, end, need, bad); \
+ *p += need; \
+ } while (0)
+
+#define __decode_and_drop_map(p, end, ktype, vtype, bad) \
+ do { \
+ u32 n; \
+ size_t need; \
+ ceph_decode_32_safe(p, end, n, bad); \
+ need = (sizeof(ktype) + sizeof(vtype)) * n; \
+ ceph_decode_need(p, end, need, bad); \
+ *p += need; \
+ } while (0)
+
+
+static int __decode_and_drop_compat_set(void **p, void* end)
+{
+ int i;
+ /* compat, ro_compat, incompat*/
+ for (i = 0; i < 3; i++) {
+ u32 n;
+ ceph_decode_need(p, end, sizeof(u64) + sizeof(u32), bad);
+ /* mask */
+ *p += sizeof(u64);
+ /* names (map<u64, string>) */
+ n = ceph_decode_32(p);
+ while (n-- > 0) {
+ u32 len;
+ ceph_decode_need(p, end, sizeof(u64) + sizeof(u32),
+ bad);
+ *p += sizeof(u64);
+ len = ceph_decode_32(p);
+ ceph_decode_need(p, end, len, bad);
+ *p += len;
+ }
+ }
+ return 0;
+bad:
+ return -1;
+}
+
/*
* Decode an MDS map
*
@@ -55,6 +109,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
int i, j, n;
int err = -EINVAL;
u8 mdsmap_v, mdsmap_cv;
+ u16 mdsmap_ev;
m = kzalloc(sizeof(*m), GFP_NOFS);
if (m == NULL)
@@ -83,7 +138,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
m->m_info = kcalloc(m->m_max_mds, sizeof(*m->m_info), GFP_NOFS);
if (m->m_info == NULL)
- goto badmem;
+ goto nomem;
/* pick out active nodes from mds_info (state > 0) */
n = ceph_decode_32(p);
@@ -166,7 +221,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
info->export_targets = kcalloc(num_export_targets,
sizeof(u32), GFP_NOFS);
if (info->export_targets == NULL)
- goto badmem;
+ goto nomem;
for (j = 0; j < num_export_targets; j++)
info->export_targets[j] =
ceph_decode_32(&pexport_targets);
@@ -180,24 +235,104 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
m->m_num_data_pg_pools = n;
m->m_data_pg_pools = kcalloc(n, sizeof(u64), GFP_NOFS);
if (!m->m_data_pg_pools)
- goto badmem;
+ goto nomem;
ceph_decode_need(p, end, sizeof(u64)*(n+1), bad);
for (i = 0; i < n; i++)
m->m_data_pg_pools[i] = ceph_decode_64(p);
m->m_cas_pg_pool = ceph_decode_64(p);
+ m->m_enabled = m->m_epoch > 1;
+
+ mdsmap_ev = 1;
+ if (mdsmap_v >= 2) {
+ ceph_decode_16_safe(p, end, mdsmap_ev, bad_ext);
+ }
+ if (mdsmap_ev >= 3) {
+ if (__decode_and_drop_compat_set(p, end) < 0)
+ goto bad_ext;
+ }
+ /* metadata_pool */
+ if (mdsmap_ev < 5) {
+ __decode_and_drop_type(p, end, u32, bad_ext);
+ } else {
+ __decode_and_drop_type(p, end, u64, bad_ext);
+ }
- /* ok, we don't care about the rest. */
+ /* created + modified + tableserver */
+ __decode_and_drop_type(p, end, struct ceph_timespec, bad_ext);
+ __decode_and_drop_type(p, end, struct ceph_timespec, bad_ext);
+ __decode_and_drop_type(p, end, u32, bad_ext);
+
+ /* in */
+ {
+ int num_laggy = 0;
+ ceph_decode_32_safe(p, end, n, bad_ext);
+ ceph_decode_need(p, end, sizeof(u32) * n, bad_ext);
+
+ for (i = 0; i < n; i++) {
+ s32 mds = ceph_decode_32(p);
+ if (mds >= 0 && mds < m->m_max_mds) {
+ if (m->m_info[mds].laggy)
+ num_laggy++;
+ }
+ }
+ m->m_num_laggy = num_laggy;
+ }
+
+ /* inc */
+ __decode_and_drop_map(p, end, u32, u32, bad_ext);
+ /* up */
+ __decode_and_drop_map(p, end, u32, u64, bad_ext);
+ /* failed */
+ __decode_and_drop_set(p, end, u32, bad_ext);
+ /* stopped */
+ __decode_and_drop_set(p, end, u32, bad_ext);
+
+ if (mdsmap_ev >= 4) {
+ /* last_failure_osd_epoch */
+ __decode_and_drop_type(p, end, u32, bad_ext);
+ }
+ if (mdsmap_ev >= 6) {
+ /* ever_allowed_snaps */
+ __decode_and_drop_type(p, end, u8, bad_ext);
+ /* explicitly_allowed_snaps */
+ __decode_and_drop_type(p, end, u8, bad_ext);
+ }
+ if (mdsmap_ev >= 7) {
+ /* inline_data_enabled */
+ __decode_and_drop_type(p, end, u8, bad_ext);
+ }
+ if (mdsmap_ev >= 8) {
+ u32 name_len;
+ /* enabled */
+ ceph_decode_8_safe(p, end, m->m_enabled, bad_ext);
+ ceph_decode_32_safe(p, end, name_len, bad_ext);
+ ceph_decode_need(p, end, name_len, bad_ext);
+ *p += name_len;
+ }
+ /* damaged */
+ if (mdsmap_ev >= 9) {
+ size_t need;
+ ceph_decode_32_safe(p, end, n, bad_ext);
+ need = sizeof(u32) * n;
+ ceph_decode_need(p, end, need, bad_ext);
+ *p += need;
+ m->m_damaged = n > 0;
+ } else {
+ m->m_damaged = false;
+ }
+bad_ext:
*p = end;
dout("mdsmap_decode success epoch %u\n", m->m_epoch);
return m;
-
-badmem:
+nomem:
err = -ENOMEM;
+ goto out_err;
bad:
pr_err("corrupt mdsmap\n");
print_hex_dump(KERN_DEBUG, "mdsmap: ",
DUMP_PREFIX_OFFSET, 16, 1,
start, end - start, true);
+out_err:
ceph_mdsmap_destroy(m);
return ERR_PTR(err);
}
@@ -212,3 +347,19 @@ void ceph_mdsmap_destroy(struct ceph_mdsmap *m)
kfree(m->m_data_pg_pools);
kfree(m);
}
+
+bool ceph_mdsmap_is_cluster_available(struct ceph_mdsmap *m)
+{
+ int i, nr_active = 0;
+ if (!m->m_enabled)
+ return false;
+ if (m->m_damaged)
+ return false;
+ if (m->m_num_laggy > 0)
+ return false;
+ for (i = 0; i < m->m_max_mds; i++) {
+ if (m->m_info[i].state == CEPH_MDS_STATE_ACTIVE)
+ nr_active++;
+ }
+ return nr_active > 0;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-26 09:27:36 +0000