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![Fabian Frederick](/assets/img/avatar_default.png)
Update the last pr_warning callsites in fs branch Signed-off-by: Fabian Frederick <fabf@skynet.be> Cc: Sage Weil <sage@inktank.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
189 lines
4.5 KiB
C
189 lines
4.5 KiB
C
#include <linux/ceph/ceph_debug.h>
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#include <linux/bug.h>
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#include <linux/err.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/types.h>
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#include <linux/ceph/mdsmap.h>
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#include <linux/ceph/messenger.h>
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#include <linux/ceph/decode.h>
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#include "super.h"
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/*
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* choose a random mds that is "up" (i.e. has a state > 0), or -1.
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*/
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int ceph_mdsmap_get_random_mds(struct ceph_mdsmap *m)
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{
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int n = 0;
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int i;
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/* special case for one mds */
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if (1 == m->m_max_mds && m->m_info[0].state > 0)
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return 0;
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/* count */
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for (i = 0; i < m->m_max_mds; i++)
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if (m->m_info[i].state > 0)
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n++;
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if (n == 0)
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return -1;
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/* pick */
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n = prandom_u32() % n;
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i = 0;
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for (i = 0; n > 0; i++, n--)
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while (m->m_info[i].state <= 0)
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i++;
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return i;
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}
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/*
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* Decode an MDS map
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*
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* Ignore any fields we don't care about (there are quite a few of
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* them).
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*/
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struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
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{
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struct ceph_mdsmap *m;
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const void *start = *p;
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int i, j, n;
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int err = -EINVAL;
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u16 version;
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m = kzalloc(sizeof(*m), GFP_NOFS);
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if (m == NULL)
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return ERR_PTR(-ENOMEM);
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ceph_decode_16_safe(p, end, version, bad);
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if (version > 3) {
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pr_warn("got mdsmap version %d > 3, failing", version);
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goto bad;
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}
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ceph_decode_need(p, end, 8*sizeof(u32) + sizeof(u64), bad);
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m->m_epoch = ceph_decode_32(p);
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m->m_client_epoch = ceph_decode_32(p);
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m->m_last_failure = ceph_decode_32(p);
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m->m_root = ceph_decode_32(p);
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m->m_session_timeout = ceph_decode_32(p);
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m->m_session_autoclose = ceph_decode_32(p);
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m->m_max_file_size = ceph_decode_64(p);
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m->m_max_mds = ceph_decode_32(p);
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m->m_info = kcalloc(m->m_max_mds, sizeof(*m->m_info), GFP_NOFS);
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if (m->m_info == NULL)
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goto badmem;
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/* pick out active nodes from mds_info (state > 0) */
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n = ceph_decode_32(p);
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for (i = 0; i < n; i++) {
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u64 global_id;
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u32 namelen;
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s32 mds, inc, state;
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u64 state_seq;
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u8 infoversion;
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struct ceph_entity_addr addr;
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u32 num_export_targets;
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void *pexport_targets = NULL;
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struct ceph_timespec laggy_since;
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struct ceph_mds_info *info;
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ceph_decode_need(p, end, sizeof(u64)*2 + 1 + sizeof(u32), bad);
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global_id = ceph_decode_64(p);
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infoversion = ceph_decode_8(p);
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*p += sizeof(u64);
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namelen = ceph_decode_32(p); /* skip mds name */
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*p += namelen;
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ceph_decode_need(p, end,
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4*sizeof(u32) + sizeof(u64) +
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sizeof(addr) + sizeof(struct ceph_timespec),
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bad);
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mds = ceph_decode_32(p);
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inc = ceph_decode_32(p);
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state = ceph_decode_32(p);
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state_seq = ceph_decode_64(p);
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ceph_decode_copy(p, &addr, sizeof(addr));
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ceph_decode_addr(&addr);
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ceph_decode_copy(p, &laggy_since, sizeof(laggy_since));
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*p += sizeof(u32);
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ceph_decode_32_safe(p, end, namelen, bad);
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*p += namelen;
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if (infoversion >= 2) {
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ceph_decode_32_safe(p, end, num_export_targets, bad);
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pexport_targets = *p;
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*p += num_export_targets * sizeof(u32);
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} else {
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num_export_targets = 0;
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}
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dout("mdsmap_decode %d/%d %lld mds%d.%d %s %s\n",
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i+1, n, global_id, mds, inc,
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ceph_pr_addr(&addr.in_addr),
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ceph_mds_state_name(state));
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if (mds < 0 || mds >= m->m_max_mds || state <= 0)
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continue;
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info = &m->m_info[mds];
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info->global_id = global_id;
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info->state = state;
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info->addr = addr;
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info->laggy = (laggy_since.tv_sec != 0 ||
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laggy_since.tv_nsec != 0);
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info->num_export_targets = num_export_targets;
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if (num_export_targets) {
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info->export_targets = kcalloc(num_export_targets,
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sizeof(u32), GFP_NOFS);
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if (info->export_targets == NULL)
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goto badmem;
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for (j = 0; j < num_export_targets; j++)
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info->export_targets[j] =
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ceph_decode_32(&pexport_targets);
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} else {
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info->export_targets = NULL;
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}
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}
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/* pg_pools */
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ceph_decode_32_safe(p, end, n, bad);
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m->m_num_data_pg_pools = n;
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m->m_data_pg_pools = kcalloc(n, sizeof(u64), GFP_NOFS);
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if (!m->m_data_pg_pools)
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goto badmem;
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ceph_decode_need(p, end, sizeof(u64)*(n+1), bad);
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for (i = 0; i < n; i++)
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m->m_data_pg_pools[i] = ceph_decode_64(p);
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m->m_cas_pg_pool = ceph_decode_64(p);
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/* ok, we don't care about the rest. */
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dout("mdsmap_decode success epoch %u\n", m->m_epoch);
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return m;
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badmem:
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err = -ENOMEM;
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bad:
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pr_err("corrupt mdsmap\n");
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print_hex_dump(KERN_DEBUG, "mdsmap: ",
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DUMP_PREFIX_OFFSET, 16, 1,
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start, end - start, true);
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ceph_mdsmap_destroy(m);
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return ERR_PTR(err);
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}
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void ceph_mdsmap_destroy(struct ceph_mdsmap *m)
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{
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int i;
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for (i = 0; i < m->m_max_mds; i++)
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kfree(m->m_info[i].export_targets);
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kfree(m->m_info);
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kfree(m->m_data_pg_pools);
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kfree(m);
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}
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