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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![Ilya Dryomov](/assets/img/avatar_default.png)
Encapsulate kmalloc vs vmalloc memory allocation and freeing logic into two helpers, ceph_kvmalloc() and ceph_kvfree(), and switch to them. ceph_kvmalloc() kmalloc()'s a maximum of 8 pages, anything bigger is vmalloc()'ed with __GFP_HIGHMEM set. This changes the existing behaviour: - for buffers (ceph_buffer_new()), from trying to kmalloc() everything and using vmalloc() just as a fallback - for messages (ceph_msg_new()), from going to vmalloc() for anything bigger than a page - for messages (ceph_msg_new()), from disallowing vmalloc() to use high memory Signed-off-by: Ilya Dryomov <ilya.dryomov@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
664 lines
15 KiB
C
664 lines
15 KiB
C
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#include <linux/ceph/ceph_debug.h>
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#include <linux/backing-dev.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/inet.h>
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#include <linux/in6.h>
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#include <linux/key.h>
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#include <keys/ceph-type.h>
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#include <linux/module.h>
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#include <linux/mount.h>
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#include <linux/parser.h>
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#include <linux/sched.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/statfs.h>
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#include <linux/string.h>
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#include <linux/vmalloc.h>
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#include <linux/nsproxy.h>
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#include <net/net_namespace.h>
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#include <linux/ceph/ceph_features.h>
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#include <linux/ceph/libceph.h>
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#include <linux/ceph/debugfs.h>
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#include <linux/ceph/decode.h>
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#include <linux/ceph/mon_client.h>
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#include <linux/ceph/auth.h>
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#include "crypto.h"
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/*
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* Module compatibility interface. For now it doesn't do anything,
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* but its existence signals a certain level of functionality.
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*
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* The data buffer is used to pass information both to and from
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* libceph. The return value indicates whether libceph determines
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* it is compatible with the caller (from another kernel module),
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* given the provided data.
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*
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* The data pointer can be null.
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*/
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bool libceph_compatible(void *data)
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{
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return true;
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}
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EXPORT_SYMBOL(libceph_compatible);
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/*
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* find filename portion of a path (/foo/bar/baz -> baz)
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*/
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const char *ceph_file_part(const char *s, int len)
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{
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const char *e = s + len;
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while (e != s && *(e-1) != '/')
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e--;
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return e;
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}
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EXPORT_SYMBOL(ceph_file_part);
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const char *ceph_msg_type_name(int type)
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{
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switch (type) {
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case CEPH_MSG_SHUTDOWN: return "shutdown";
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case CEPH_MSG_PING: return "ping";
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case CEPH_MSG_AUTH: return "auth";
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case CEPH_MSG_AUTH_REPLY: return "auth_reply";
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case CEPH_MSG_MON_MAP: return "mon_map";
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case CEPH_MSG_MON_GET_MAP: return "mon_get_map";
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case CEPH_MSG_MON_SUBSCRIBE: return "mon_subscribe";
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case CEPH_MSG_MON_SUBSCRIBE_ACK: return "mon_subscribe_ack";
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case CEPH_MSG_STATFS: return "statfs";
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case CEPH_MSG_STATFS_REPLY: return "statfs_reply";
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case CEPH_MSG_MDS_MAP: return "mds_map";
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case CEPH_MSG_CLIENT_SESSION: return "client_session";
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case CEPH_MSG_CLIENT_RECONNECT: return "client_reconnect";
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case CEPH_MSG_CLIENT_REQUEST: return "client_request";
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case CEPH_MSG_CLIENT_REQUEST_FORWARD: return "client_request_forward";
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case CEPH_MSG_CLIENT_REPLY: return "client_reply";
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case CEPH_MSG_CLIENT_CAPS: return "client_caps";
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case CEPH_MSG_CLIENT_CAPRELEASE: return "client_cap_release";
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case CEPH_MSG_CLIENT_SNAP: return "client_snap";
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case CEPH_MSG_CLIENT_LEASE: return "client_lease";
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case CEPH_MSG_OSD_MAP: return "osd_map";
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case CEPH_MSG_OSD_OP: return "osd_op";
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case CEPH_MSG_OSD_OPREPLY: return "osd_opreply";
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case CEPH_MSG_WATCH_NOTIFY: return "watch_notify";
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default: return "unknown";
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}
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}
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EXPORT_SYMBOL(ceph_msg_type_name);
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/*
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* Initially learn our fsid, or verify an fsid matches.
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*/
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int ceph_check_fsid(struct ceph_client *client, struct ceph_fsid *fsid)
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{
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if (client->have_fsid) {
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if (ceph_fsid_compare(&client->fsid, fsid)) {
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pr_err("bad fsid, had %pU got %pU",
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&client->fsid, fsid);
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return -1;
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}
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} else {
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memcpy(&client->fsid, fsid, sizeof(*fsid));
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}
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return 0;
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}
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EXPORT_SYMBOL(ceph_check_fsid);
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static int strcmp_null(const char *s1, const char *s2)
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{
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if (!s1 && !s2)
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return 0;
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if (s1 && !s2)
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return -1;
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if (!s1 && s2)
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return 1;
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return strcmp(s1, s2);
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}
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int ceph_compare_options(struct ceph_options *new_opt,
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struct ceph_client *client)
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{
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struct ceph_options *opt1 = new_opt;
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struct ceph_options *opt2 = client->options;
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int ofs = offsetof(struct ceph_options, mon_addr);
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int i;
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int ret;
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ret = memcmp(opt1, opt2, ofs);
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if (ret)
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return ret;
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ret = strcmp_null(opt1->name, opt2->name);
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if (ret)
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return ret;
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if (opt1->key && !opt2->key)
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return -1;
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if (!opt1->key && opt2->key)
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return 1;
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if (opt1->key && opt2->key) {
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if (opt1->key->type != opt2->key->type)
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return -1;
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if (opt1->key->created.tv_sec != opt2->key->created.tv_sec)
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return -1;
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if (opt1->key->created.tv_nsec != opt2->key->created.tv_nsec)
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return -1;
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if (opt1->key->len != opt2->key->len)
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return -1;
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if (opt1->key->key && !opt2->key->key)
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return -1;
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if (!opt1->key->key && opt2->key->key)
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return 1;
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if (opt1->key->key && opt2->key->key) {
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ret = memcmp(opt1->key->key, opt2->key->key, opt1->key->len);
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if (ret)
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return ret;
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}
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}
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/* any matching mon ip implies a match */
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for (i = 0; i < opt1->num_mon; i++) {
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if (ceph_monmap_contains(client->monc.monmap,
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&opt1->mon_addr[i]))
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return 0;
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}
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return -1;
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}
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EXPORT_SYMBOL(ceph_compare_options);
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void *ceph_kvmalloc(size_t size, gfp_t flags)
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{
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if (size <= (PAGE_SIZE << PAGE_ALLOC_COSTLY_ORDER)) {
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void *ptr = kmalloc(size, flags | __GFP_NOWARN);
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if (ptr)
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return ptr;
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}
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return __vmalloc(size, flags | __GFP_HIGHMEM, PAGE_KERNEL);
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}
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void ceph_kvfree(const void *ptr)
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{
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if (is_vmalloc_addr(ptr))
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vfree(ptr);
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else
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kfree(ptr);
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}
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static int parse_fsid(const char *str, struct ceph_fsid *fsid)
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{
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int i = 0;
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char tmp[3];
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int err = -EINVAL;
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int d;
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dout("parse_fsid '%s'\n", str);
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tmp[2] = 0;
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while (*str && i < 16) {
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if (ispunct(*str)) {
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str++;
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continue;
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}
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if (!isxdigit(str[0]) || !isxdigit(str[1]))
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break;
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tmp[0] = str[0];
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tmp[1] = str[1];
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if (sscanf(tmp, "%x", &d) < 1)
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break;
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fsid->fsid[i] = d & 0xff;
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i++;
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str += 2;
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}
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if (i == 16)
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err = 0;
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dout("parse_fsid ret %d got fsid %pU", err, fsid);
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return err;
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}
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/*
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* ceph options
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*/
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enum {
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Opt_osdtimeout,
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Opt_osdkeepalivetimeout,
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Opt_mount_timeout,
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Opt_osd_idle_ttl,
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Opt_last_int,
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/* int args above */
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Opt_fsid,
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Opt_name,
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Opt_secret,
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Opt_key,
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Opt_ip,
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Opt_last_string,
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/* string args above */
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Opt_share,
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Opt_noshare,
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Opt_crc,
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Opt_nocrc,
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};
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static match_table_t opt_tokens = {
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{Opt_osdtimeout, "osdtimeout=%d"},
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{Opt_osdkeepalivetimeout, "osdkeepalive=%d"},
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{Opt_mount_timeout, "mount_timeout=%d"},
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{Opt_osd_idle_ttl, "osd_idle_ttl=%d"},
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/* int args above */
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{Opt_fsid, "fsid=%s"},
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{Opt_name, "name=%s"},
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{Opt_secret, "secret=%s"},
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{Opt_key, "key=%s"},
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{Opt_ip, "ip=%s"},
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/* string args above */
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{Opt_share, "share"},
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{Opt_noshare, "noshare"},
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{Opt_crc, "crc"},
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{Opt_nocrc, "nocrc"},
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{-1, NULL}
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};
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void ceph_destroy_options(struct ceph_options *opt)
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{
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dout("destroy_options %p\n", opt);
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kfree(opt->name);
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if (opt->key) {
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ceph_crypto_key_destroy(opt->key);
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kfree(opt->key);
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}
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kfree(opt->mon_addr);
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kfree(opt);
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}
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EXPORT_SYMBOL(ceph_destroy_options);
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/* get secret from key store */
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static int get_secret(struct ceph_crypto_key *dst, const char *name) {
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struct key *ukey;
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int key_err;
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int err = 0;
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struct ceph_crypto_key *ckey;
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ukey = request_key(&key_type_ceph, name, NULL);
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if (!ukey || IS_ERR(ukey)) {
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/* request_key errors don't map nicely to mount(2)
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errors; don't even try, but still printk */
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key_err = PTR_ERR(ukey);
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switch (key_err) {
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case -ENOKEY:
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pr_warning("ceph: Mount failed due to key not found: %s\n", name);
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break;
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case -EKEYEXPIRED:
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pr_warning("ceph: Mount failed due to expired key: %s\n", name);
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break;
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case -EKEYREVOKED:
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pr_warning("ceph: Mount failed due to revoked key: %s\n", name);
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break;
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default:
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pr_warning("ceph: Mount failed due to unknown key error"
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" %d: %s\n", key_err, name);
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}
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err = -EPERM;
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goto out;
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}
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ckey = ukey->payload.data;
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err = ceph_crypto_key_clone(dst, ckey);
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if (err)
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goto out_key;
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/* pass through, err is 0 */
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out_key:
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key_put(ukey);
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out:
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return err;
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}
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struct ceph_options *
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ceph_parse_options(char *options, const char *dev_name,
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const char *dev_name_end,
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int (*parse_extra_token)(char *c, void *private),
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void *private)
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{
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struct ceph_options *opt;
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const char *c;
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int err = -ENOMEM;
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substring_t argstr[MAX_OPT_ARGS];
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if (current->nsproxy->net_ns != &init_net)
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return ERR_PTR(-EINVAL);
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opt = kzalloc(sizeof(*opt), GFP_KERNEL);
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if (!opt)
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return ERR_PTR(-ENOMEM);
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opt->mon_addr = kcalloc(CEPH_MAX_MON, sizeof(*opt->mon_addr),
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GFP_KERNEL);
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if (!opt->mon_addr)
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goto out;
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dout("parse_options %p options '%s' dev_name '%s'\n", opt, options,
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dev_name);
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/* start with defaults */
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opt->flags = CEPH_OPT_DEFAULT;
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opt->osd_keepalive_timeout = CEPH_OSD_KEEPALIVE_DEFAULT;
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opt->mount_timeout = CEPH_MOUNT_TIMEOUT_DEFAULT; /* seconds */
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opt->osd_idle_ttl = CEPH_OSD_IDLE_TTL_DEFAULT; /* seconds */
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/* get mon ip(s) */
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/* ip1[:port1][,ip2[:port2]...] */
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err = ceph_parse_ips(dev_name, dev_name_end, opt->mon_addr,
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CEPH_MAX_MON, &opt->num_mon);
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if (err < 0)
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goto out;
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/* parse mount options */
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while ((c = strsep(&options, ",")) != NULL) {
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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, opt_tokens, argstr);
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if (token < 0 && parse_extra_token) {
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/* extra? */
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err = parse_extra_token((char *)c, private);
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if (err < 0) {
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pr_err("bad option at '%s'\n", c);
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goto out;
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}
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continue;
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}
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if (token < Opt_last_int) {
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ret = match_int(&argstr[0], &intval);
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if (ret < 0) {
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pr_err("bad mount option arg (not int) "
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"at '%s'\n", c);
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continue;
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}
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dout("got int token %d val %d\n", token, intval);
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} else if (token > Opt_last_int && token < Opt_last_string) {
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dout("got string token %d val %s\n", token,
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argstr[0].from);
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} else {
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dout("got token %d\n", token);
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}
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switch (token) {
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case Opt_ip:
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err = ceph_parse_ips(argstr[0].from,
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argstr[0].to,
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&opt->my_addr,
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1, NULL);
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if (err < 0)
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goto out;
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opt->flags |= CEPH_OPT_MYIP;
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break;
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case Opt_fsid:
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err = parse_fsid(argstr[0].from, &opt->fsid);
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if (err == 0)
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opt->flags |= CEPH_OPT_FSID;
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break;
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case Opt_name:
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opt->name = kstrndup(argstr[0].from,
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argstr[0].to-argstr[0].from,
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GFP_KERNEL);
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break;
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case Opt_secret:
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opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
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if (!opt->key) {
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err = -ENOMEM;
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goto out;
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}
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err = ceph_crypto_key_unarmor(opt->key, argstr[0].from);
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if (err < 0)
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goto out;
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break;
|
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case Opt_key:
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opt->key = kzalloc(sizeof(*opt->key), GFP_KERNEL);
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if (!opt->key) {
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err = -ENOMEM;
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goto out;
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}
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err = get_secret(opt->key, argstr[0].from);
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if (err < 0)
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goto out;
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break;
|
|
|
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/* misc */
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case Opt_osdtimeout:
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pr_warning("ignoring deprecated osdtimeout option\n");
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break;
|
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case Opt_osdkeepalivetimeout:
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opt->osd_keepalive_timeout = intval;
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break;
|
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case Opt_osd_idle_ttl:
|
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opt->osd_idle_ttl = intval;
|
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break;
|
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case Opt_mount_timeout:
|
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opt->mount_timeout = intval;
|
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break;
|
|
|
|
case Opt_share:
|
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opt->flags &= ~CEPH_OPT_NOSHARE;
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break;
|
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case Opt_noshare:
|
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opt->flags |= CEPH_OPT_NOSHARE;
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break;
|
|
|
|
case Opt_crc:
|
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opt->flags &= ~CEPH_OPT_NOCRC;
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break;
|
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case Opt_nocrc:
|
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opt->flags |= CEPH_OPT_NOCRC;
|
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break;
|
|
|
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default:
|
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BUG_ON(token);
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}
|
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}
|
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|
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/* success */
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return opt;
|
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|
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out:
|
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ceph_destroy_options(opt);
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return ERR_PTR(err);
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}
|
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EXPORT_SYMBOL(ceph_parse_options);
|
|
|
|
u64 ceph_client_id(struct ceph_client *client)
|
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{
|
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return client->monc.auth->global_id;
|
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}
|
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EXPORT_SYMBOL(ceph_client_id);
|
|
|
|
/*
|
|
* create a fresh client instance
|
|
*/
|
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struct ceph_client *ceph_create_client(struct ceph_options *opt, void *private,
|
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u64 supported_features,
|
|
u64 required_features)
|
|
{
|
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struct ceph_client *client;
|
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struct ceph_entity_addr *myaddr = NULL;
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int err = -ENOMEM;
|
|
|
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client = kzalloc(sizeof(*client), GFP_KERNEL);
|
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if (client == NULL)
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return ERR_PTR(-ENOMEM);
|
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|
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client->private = private;
|
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client->options = opt;
|
|
|
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mutex_init(&client->mount_mutex);
|
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init_waitqueue_head(&client->auth_wq);
|
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client->auth_err = 0;
|
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|
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client->extra_mon_dispatch = NULL;
|
|
client->supported_features = CEPH_FEATURES_SUPPORTED_DEFAULT |
|
|
supported_features;
|
|
client->required_features = CEPH_FEATURES_REQUIRED_DEFAULT |
|
|
required_features;
|
|
|
|
/* msgr */
|
|
if (ceph_test_opt(client, MYIP))
|
|
myaddr = &client->options->my_addr;
|
|
ceph_messenger_init(&client->msgr, myaddr,
|
|
client->supported_features,
|
|
client->required_features,
|
|
ceph_test_opt(client, NOCRC));
|
|
|
|
/* subsystems */
|
|
err = ceph_monc_init(&client->monc, client);
|
|
if (err < 0)
|
|
goto fail;
|
|
err = ceph_osdc_init(&client->osdc, client);
|
|
if (err < 0)
|
|
goto fail_monc;
|
|
|
|
return client;
|
|
|
|
fail_monc:
|
|
ceph_monc_stop(&client->monc);
|
|
fail:
|
|
kfree(client);
|
|
return ERR_PTR(err);
|
|
}
|
|
EXPORT_SYMBOL(ceph_create_client);
|
|
|
|
void ceph_destroy_client(struct ceph_client *client)
|
|
{
|
|
dout("destroy_client %p\n", client);
|
|
|
|
atomic_set(&client->msgr.stopping, 1);
|
|
|
|
/* unmount */
|
|
ceph_osdc_stop(&client->osdc);
|
|
|
|
ceph_monc_stop(&client->monc);
|
|
|
|
ceph_debugfs_client_cleanup(client);
|
|
|
|
ceph_destroy_options(client->options);
|
|
|
|
kfree(client);
|
|
dout("destroy_client %p done\n", client);
|
|
}
|
|
EXPORT_SYMBOL(ceph_destroy_client);
|
|
|
|
/*
|
|
* true if we have the mon map (and have thus joined the cluster)
|
|
*/
|
|
static int have_mon_and_osd_map(struct ceph_client *client)
|
|
{
|
|
return client->monc.monmap && client->monc.monmap->epoch &&
|
|
client->osdc.osdmap && client->osdc.osdmap->epoch;
|
|
}
|
|
|
|
/*
|
|
* mount: join the ceph cluster, and open root directory.
|
|
*/
|
|
int __ceph_open_session(struct ceph_client *client, unsigned long started)
|
|
{
|
|
int err;
|
|
unsigned long timeout = client->options->mount_timeout * HZ;
|
|
|
|
/* open session, and wait for mon and osd maps */
|
|
err = ceph_monc_open_session(&client->monc);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
while (!have_mon_and_osd_map(client)) {
|
|
err = -EIO;
|
|
if (timeout && time_after_eq(jiffies, started + timeout))
|
|
return err;
|
|
|
|
/* wait */
|
|
dout("mount waiting for mon_map\n");
|
|
err = wait_event_interruptible_timeout(client->auth_wq,
|
|
have_mon_and_osd_map(client) || (client->auth_err < 0),
|
|
timeout);
|
|
if (err == -EINTR || err == -ERESTARTSYS)
|
|
return err;
|
|
if (client->auth_err < 0)
|
|
return client->auth_err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(__ceph_open_session);
|
|
|
|
|
|
int ceph_open_session(struct ceph_client *client)
|
|
{
|
|
int ret;
|
|
unsigned long started = jiffies; /* note the start time */
|
|
|
|
dout("open_session start\n");
|
|
mutex_lock(&client->mount_mutex);
|
|
|
|
ret = __ceph_open_session(client, started);
|
|
|
|
mutex_unlock(&client->mount_mutex);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(ceph_open_session);
|
|
|
|
|
|
static int __init init_ceph_lib(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
ret = ceph_debugfs_init();
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
ret = ceph_crypto_init();
|
|
if (ret < 0)
|
|
goto out_debugfs;
|
|
|
|
ret = ceph_msgr_init();
|
|
if (ret < 0)
|
|
goto out_crypto;
|
|
|
|
ret = ceph_osdc_setup();
|
|
if (ret < 0)
|
|
goto out_msgr;
|
|
|
|
pr_info("loaded (mon/osd proto %d/%d)\n",
|
|
CEPH_MONC_PROTOCOL, CEPH_OSDC_PROTOCOL);
|
|
|
|
return 0;
|
|
|
|
out_msgr:
|
|
ceph_msgr_exit();
|
|
out_crypto:
|
|
ceph_crypto_shutdown();
|
|
out_debugfs:
|
|
ceph_debugfs_cleanup();
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static void __exit exit_ceph_lib(void)
|
|
{
|
|
dout("exit_ceph_lib\n");
|
|
ceph_osdc_cleanup();
|
|
ceph_msgr_exit();
|
|
ceph_crypto_shutdown();
|
|
ceph_debugfs_cleanup();
|
|
}
|
|
|
|
module_init(init_ceph_lib);
|
|
module_exit(exit_ceph_lib);
|
|
|
|
MODULE_AUTHOR("Sage Weil <sage@newdream.net>");
|
|
MODULE_AUTHOR("Yehuda Sadeh <yehuda@hq.newdream.net>");
|
|
MODULE_AUTHOR("Patience Warnick <patience@newdream.net>");
|
|
MODULE_DESCRIPTION("Ceph filesystem for Linux");
|
|
MODULE_LICENSE("GPL");
|