forked from luck/tmp_suning_uos_patched
ceph: reduce parse_mount_args stack usage
Since we've increased the max mon count, we shouldn't put the addr array on the parse_mount_args stack. Put it on the heap instead. Signed-off-by: Sage Weil <sage@newdream.net>
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parent
ecb19c4649
commit
7b813c4602
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@ -314,12 +314,16 @@ static int parse_mount_args(struct ceph_client *client,
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int err;
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substring_t argstr[MAX_OPT_ARGS];
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int num_mon;
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struct ceph_entity_addr mon_addr[CEPH_MAX_MON];
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struct ceph_entity_addr *mon_addr;
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int i;
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dout("parse_mount_args dev_name '%s'\n", dev_name);
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memset(args, 0, sizeof(*args));
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mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*mon_addr), GFP_KERNEL);
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if (!mon_addr)
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return -ENOMEM;
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/* start with defaults */
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args->sb_flags = flags;
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args->flags = CEPH_OPT_DEFAULT;
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@ -333,27 +337,29 @@ static int parse_mount_args(struct ceph_client *client,
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args->max_readdir = 1024;
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/* ip1[:port1][,ip2[:port2]...]:/subdir/in/fs */
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err = -EINVAL;
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if (!dev_name)
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return -EINVAL;
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goto out;
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*path = strstr(dev_name, ":/");
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if (*path == NULL) {
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pr_err("device name is missing path (no :/ in %s)\n",
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dev_name);
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return -EINVAL;
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goto out;
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}
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/* get mon ip(s) */
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err = ceph_parse_ips(dev_name, *path, mon_addr,
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CEPH_MAX_MON, &num_mon);
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if (err < 0)
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return err;
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goto out;
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/* build initial monmap */
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err = -ENOMEM;
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client->monc.monmap = kzalloc(sizeof(*client->monc.monmap) +
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num_mon*sizeof(client->monc.monmap->mon_inst[0]),
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GFP_KERNEL);
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if (!client->monc.monmap)
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return -ENOMEM;
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goto out;
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for (i = 0; i < num_mon; i++) {
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client->monc.monmap->mon_inst[i].addr = mon_addr[i];
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client->monc.monmap->mon_inst[i].addr.erank = 0;
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@ -374,11 +380,11 @@ static int parse_mount_args(struct ceph_client *client,
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int token, intval, ret;
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if (!*c)
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continue;
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err = -EINVAL;
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token = match_token((char *)c, arg_tokens, argstr);
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if (token < 0) {
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pr_err("bad mount option at '%s'\n", c);
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return -EINVAL;
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goto out;
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}
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if (token < Opt_ip) {
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ret = match_int(&argstr[0], &intval);
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@ -468,8 +474,11 @@ static int parse_mount_args(struct ceph_client *client,
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BUG_ON(token);
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}
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}
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err = 0;
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return 0;
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out:
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kfree(mon_addr);
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return err;
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}
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static void release_mount_args(struct ceph_mount_args *args)
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