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![H Hartley Sweeten](/assets/img/avatar_default.png)
The buffer 'sc.cpu_mask' is a kernel buffer. If bitmap_parse is used instead of __bitmap_parse the extra parameter that indicates a kernel buffer is not needed. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Lars Ellenberg <drbd-dev@lists.linbit.com> Cc: Philipp Reisner <philipp.reisner@linbit.com> Cc: Jens Axboe <axboe@kernel.dk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jens Axboe <jaxboe@fusionio.com>
2651 lines
73 KiB
C
2651 lines
73 KiB
C
/*
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drbd_nl.c
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This file is part of DRBD by Philipp Reisner and Lars Ellenberg.
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Copyright (C) 2001-2008, LINBIT Information Technologies GmbH.
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Copyright (C) 1999-2008, Philipp Reisner <philipp.reisner@linbit.com>.
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Copyright (C) 2002-2008, Lars Ellenberg <lars.ellenberg@linbit.com>.
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drbd is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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drbd is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with drbd; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/module.h>
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#include <linux/drbd.h>
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#include <linux/in.h>
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#include <linux/fs.h>
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#include <linux/file.h>
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#include <linux/slab.h>
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#include <linux/connector.h>
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#include <linux/blkpg.h>
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#include <linux/cpumask.h>
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#include "drbd_int.h"
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#include "drbd_req.h"
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#include "drbd_wrappers.h"
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#include <asm/unaligned.h>
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#include <linux/drbd_tag_magic.h>
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#include <linux/drbd_limits.h>
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#include <linux/compiler.h>
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#include <linux/kthread.h>
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static unsigned short *tl_add_blob(unsigned short *, enum drbd_tags, const void *, int);
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static unsigned short *tl_add_str(unsigned short *, enum drbd_tags, const char *);
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static unsigned short *tl_add_int(unsigned short *, enum drbd_tags, const void *);
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/* see get_sb_bdev and bd_claim */
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static char *drbd_m_holder = "Hands off! this is DRBD's meta data device.";
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/* Generate the tag_list to struct functions */
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#define NL_PACKET(name, number, fields) \
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static int name ## _from_tags(struct drbd_conf *mdev, \
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unsigned short *tags, struct name *arg) __attribute__ ((unused)); \
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static int name ## _from_tags(struct drbd_conf *mdev, \
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unsigned short *tags, struct name *arg) \
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{ \
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int tag; \
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int dlen; \
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\
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while ((tag = get_unaligned(tags++)) != TT_END) { \
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dlen = get_unaligned(tags++); \
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switch (tag_number(tag)) { \
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fields \
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default: \
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if (tag & T_MANDATORY) { \
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dev_err(DEV, "Unknown tag: %d\n", tag_number(tag)); \
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return 0; \
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} \
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} \
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tags = (unsigned short *)((char *)tags + dlen); \
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} \
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return 1; \
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}
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#define NL_INTEGER(pn, pr, member) \
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case pn: /* D_ASSERT( tag_type(tag) == TT_INTEGER ); */ \
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arg->member = get_unaligned((int *)(tags)); \
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break;
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#define NL_INT64(pn, pr, member) \
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case pn: /* D_ASSERT( tag_type(tag) == TT_INT64 ); */ \
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arg->member = get_unaligned((u64 *)(tags)); \
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break;
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#define NL_BIT(pn, pr, member) \
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case pn: /* D_ASSERT( tag_type(tag) == TT_BIT ); */ \
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arg->member = *(char *)(tags) ? 1 : 0; \
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break;
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#define NL_STRING(pn, pr, member, len) \
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case pn: /* D_ASSERT( tag_type(tag) == TT_STRING ); */ \
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if (dlen > len) { \
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dev_err(DEV, "arg too long: %s (%u wanted, max len: %u bytes)\n", \
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#member, dlen, (unsigned int)len); \
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return 0; \
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} \
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arg->member ## _len = dlen; \
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memcpy(arg->member, tags, min_t(size_t, dlen, len)); \
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break;
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#include "linux/drbd_nl.h"
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/* Generate the struct to tag_list functions */
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#define NL_PACKET(name, number, fields) \
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static unsigned short* \
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name ## _to_tags(struct drbd_conf *mdev, \
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struct name *arg, unsigned short *tags) __attribute__ ((unused)); \
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static unsigned short* \
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name ## _to_tags(struct drbd_conf *mdev, \
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struct name *arg, unsigned short *tags) \
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{ \
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fields \
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return tags; \
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}
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#define NL_INTEGER(pn, pr, member) \
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put_unaligned(pn | pr | TT_INTEGER, tags++); \
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put_unaligned(sizeof(int), tags++); \
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put_unaligned(arg->member, (int *)tags); \
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tags = (unsigned short *)((char *)tags+sizeof(int));
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#define NL_INT64(pn, pr, member) \
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put_unaligned(pn | pr | TT_INT64, tags++); \
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put_unaligned(sizeof(u64), tags++); \
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put_unaligned(arg->member, (u64 *)tags); \
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tags = (unsigned short *)((char *)tags+sizeof(u64));
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#define NL_BIT(pn, pr, member) \
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put_unaligned(pn | pr | TT_BIT, tags++); \
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put_unaligned(sizeof(char), tags++); \
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*(char *)tags = arg->member; \
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tags = (unsigned short *)((char *)tags+sizeof(char));
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#define NL_STRING(pn, pr, member, len) \
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put_unaligned(pn | pr | TT_STRING, tags++); \
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put_unaligned(arg->member ## _len, tags++); \
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memcpy(tags, arg->member, arg->member ## _len); \
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tags = (unsigned short *)((char *)tags + arg->member ## _len);
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#include "linux/drbd_nl.h"
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void drbd_bcast_ev_helper(struct drbd_conf *mdev, char *helper_name);
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void drbd_nl_send_reply(struct cn_msg *, int);
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int drbd_khelper(struct drbd_conf *mdev, char *cmd)
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{
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char *envp[] = { "HOME=/",
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"TERM=linux",
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"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
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NULL, /* Will be set to address family */
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NULL, /* Will be set to address */
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NULL };
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char mb[12], af[20], ad[60], *afs;
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char *argv[] = {usermode_helper, cmd, mb, NULL };
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int ret;
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snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev));
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if (get_net_conf(mdev)) {
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switch (((struct sockaddr *)mdev->net_conf->peer_addr)->sa_family) {
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case AF_INET6:
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afs = "ipv6";
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snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI6",
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&((struct sockaddr_in6 *)mdev->net_conf->peer_addr)->sin6_addr);
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break;
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case AF_INET:
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afs = "ipv4";
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snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4",
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&((struct sockaddr_in *)mdev->net_conf->peer_addr)->sin_addr);
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break;
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default:
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afs = "ssocks";
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snprintf(ad, 60, "DRBD_PEER_ADDRESS=%pI4",
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&((struct sockaddr_in *)mdev->net_conf->peer_addr)->sin_addr);
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}
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snprintf(af, 20, "DRBD_PEER_AF=%s", afs);
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envp[3]=af;
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envp[4]=ad;
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put_net_conf(mdev);
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}
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/* The helper may take some time.
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* write out any unsynced meta data changes now */
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drbd_md_sync(mdev);
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dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb);
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drbd_bcast_ev_helper(mdev, cmd);
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ret = call_usermodehelper(usermode_helper, argv, envp, 1);
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if (ret)
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dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
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usermode_helper, cmd, mb,
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(ret >> 8) & 0xff, ret);
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else
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dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n",
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usermode_helper, cmd, mb,
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(ret >> 8) & 0xff, ret);
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if (ret < 0) /* Ignore any ERRNOs we got. */
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ret = 0;
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return ret;
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}
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enum drbd_disk_state drbd_try_outdate_peer(struct drbd_conf *mdev)
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{
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char *ex_to_string;
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int r;
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enum drbd_disk_state nps;
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enum drbd_fencing_p fp;
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D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
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if (get_ldev_if_state(mdev, D_CONSISTENT)) {
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fp = mdev->ldev->dc.fencing;
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put_ldev(mdev);
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} else {
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dev_warn(DEV, "Not fencing peer, I'm not even Consistent myself.\n");
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nps = mdev->state.pdsk;
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goto out;
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}
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r = drbd_khelper(mdev, "fence-peer");
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switch ((r>>8) & 0xff) {
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case 3: /* peer is inconsistent */
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ex_to_string = "peer is inconsistent or worse";
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nps = D_INCONSISTENT;
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break;
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case 4: /* peer got outdated, or was already outdated */
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ex_to_string = "peer was fenced";
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nps = D_OUTDATED;
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break;
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case 5: /* peer was down */
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if (mdev->state.disk == D_UP_TO_DATE) {
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/* we will(have) create(d) a new UUID anyways... */
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ex_to_string = "peer is unreachable, assumed to be dead";
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nps = D_OUTDATED;
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} else {
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ex_to_string = "peer unreachable, doing nothing since disk != UpToDate";
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nps = mdev->state.pdsk;
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}
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break;
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case 6: /* Peer is primary, voluntarily outdate myself.
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* This is useful when an unconnected R_SECONDARY is asked to
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* become R_PRIMARY, but finds the other peer being active. */
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ex_to_string = "peer is active";
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dev_warn(DEV, "Peer is primary, outdating myself.\n");
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nps = D_UNKNOWN;
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_drbd_request_state(mdev, NS(disk, D_OUTDATED), CS_WAIT_COMPLETE);
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break;
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case 7:
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if (fp != FP_STONITH)
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dev_err(DEV, "fence-peer() = 7 && fencing != Stonith !!!\n");
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ex_to_string = "peer was stonithed";
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nps = D_OUTDATED;
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break;
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default:
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/* The script is broken ... */
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nps = D_UNKNOWN;
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dev_err(DEV, "fence-peer helper broken, returned %d\n", (r>>8)&0xff);
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return nps;
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}
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dev_info(DEV, "fence-peer helper returned %d (%s)\n",
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(r>>8) & 0xff, ex_to_string);
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out:
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if (mdev->state.susp_fen && nps >= D_UNKNOWN) {
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/* The handler was not successful... unfreeze here, the
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state engine can not unfreeze... */
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_drbd_request_state(mdev, NS(susp_fen, 0), CS_VERBOSE);
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}
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return nps;
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}
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static int _try_outdate_peer_async(void *data)
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{
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struct drbd_conf *mdev = (struct drbd_conf *)data;
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enum drbd_disk_state nps;
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union drbd_state ns;
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nps = drbd_try_outdate_peer(mdev);
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/* Not using
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drbd_request_state(mdev, NS(pdsk, nps));
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here, because we might were able to re-establish the connection
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in the meantime. This can only partially be solved in the state's
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engine is_valid_state() and is_valid_state_transition()
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functions.
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nps can be D_INCONSISTENT, D_OUTDATED or D_UNKNOWN.
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pdsk == D_INCONSISTENT while conn >= C_CONNECTED is valid,
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therefore we have to have the pre state change check here.
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*/
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spin_lock_irq(&mdev->req_lock);
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ns = mdev->state;
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if (ns.conn < C_WF_REPORT_PARAMS) {
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ns.pdsk = nps;
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_drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
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}
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spin_unlock_irq(&mdev->req_lock);
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return 0;
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}
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void drbd_try_outdate_peer_async(struct drbd_conf *mdev)
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{
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struct task_struct *opa;
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opa = kthread_run(_try_outdate_peer_async, mdev, "drbd%d_a_helper", mdev_to_minor(mdev));
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if (IS_ERR(opa))
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dev_err(DEV, "out of mem, failed to invoke fence-peer helper\n");
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}
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enum drbd_state_rv
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drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force)
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{
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const int max_tries = 4;
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enum drbd_state_rv rv = SS_UNKNOWN_ERROR;
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int try = 0;
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int forced = 0;
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union drbd_state mask, val;
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enum drbd_disk_state nps;
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if (new_role == R_PRIMARY)
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request_ping(mdev); /* Detect a dead peer ASAP */
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mutex_lock(&mdev->state_mutex);
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mask.i = 0; mask.role = R_MASK;
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val.i = 0; val.role = new_role;
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while (try++ < max_tries) {
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rv = _drbd_request_state(mdev, mask, val, CS_WAIT_COMPLETE);
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/* in case we first succeeded to outdate,
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* but now suddenly could establish a connection */
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if (rv == SS_CW_FAILED_BY_PEER && mask.pdsk != 0) {
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val.pdsk = 0;
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mask.pdsk = 0;
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continue;
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}
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if (rv == SS_NO_UP_TO_DATE_DISK && force &&
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(mdev->state.disk < D_UP_TO_DATE &&
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mdev->state.disk >= D_INCONSISTENT)) {
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mask.disk = D_MASK;
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val.disk = D_UP_TO_DATE;
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forced = 1;
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continue;
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}
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if (rv == SS_NO_UP_TO_DATE_DISK &&
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mdev->state.disk == D_CONSISTENT && mask.pdsk == 0) {
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D_ASSERT(mdev->state.pdsk == D_UNKNOWN);
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nps = drbd_try_outdate_peer(mdev);
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if (nps == D_OUTDATED || nps == D_INCONSISTENT) {
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val.disk = D_UP_TO_DATE;
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mask.disk = D_MASK;
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}
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val.pdsk = nps;
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mask.pdsk = D_MASK;
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continue;
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}
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if (rv == SS_NOTHING_TO_DO)
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goto fail;
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if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) {
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nps = drbd_try_outdate_peer(mdev);
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if (force && nps > D_OUTDATED) {
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dev_warn(DEV, "Forced into split brain situation!\n");
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nps = D_OUTDATED;
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}
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mask.pdsk = D_MASK;
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val.pdsk = nps;
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continue;
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}
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if (rv == SS_TWO_PRIMARIES) {
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/* Maybe the peer is detected as dead very soon...
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retry at most once more in this case. */
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schedule_timeout_interruptible((mdev->net_conf->ping_timeo+1)*HZ/10);
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if (try < max_tries)
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try = max_tries - 1;
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continue;
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}
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if (rv < SS_SUCCESS) {
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rv = _drbd_request_state(mdev, mask, val,
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CS_VERBOSE + CS_WAIT_COMPLETE);
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if (rv < SS_SUCCESS)
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goto fail;
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}
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break;
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}
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|
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if (rv < SS_SUCCESS)
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goto fail;
|
|
|
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if (forced)
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dev_warn(DEV, "Forced to consider local data as UpToDate!\n");
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|
|
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/* Wait until nothing is on the fly :) */
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wait_event(mdev->misc_wait, atomic_read(&mdev->ap_pending_cnt) == 0);
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|
|
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if (new_role == R_SECONDARY) {
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set_disk_ro(mdev->vdisk, true);
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if (get_ldev(mdev)) {
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mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
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put_ldev(mdev);
|
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}
|
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} else {
|
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if (get_net_conf(mdev)) {
|
|
mdev->net_conf->want_lose = 0;
|
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put_net_conf(mdev);
|
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}
|
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set_disk_ro(mdev->vdisk, false);
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|
if (get_ldev(mdev)) {
|
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if (((mdev->state.conn < C_CONNECTED ||
|
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mdev->state.pdsk <= D_FAILED)
|
|
&& mdev->ldev->md.uuid[UI_BITMAP] == 0) || forced)
|
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drbd_uuid_new_current(mdev);
|
|
|
|
mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
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put_ldev(mdev);
|
|
}
|
|
}
|
|
|
|
/* writeout of activity log covered areas of the bitmap
|
|
* to stable storage done in after state change already */
|
|
|
|
if (mdev->state.conn >= C_WF_REPORT_PARAMS) {
|
|
/* if this was forced, we should consider sync */
|
|
if (forced)
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_state(mdev);
|
|
}
|
|
|
|
drbd_md_sync(mdev);
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
fail:
|
|
mutex_unlock(&mdev->state_mutex);
|
|
return rv;
|
|
}
|
|
|
|
static struct drbd_conf *ensure_mdev(int minor, int create)
|
|
{
|
|
struct drbd_conf *mdev;
|
|
|
|
if (minor >= minor_count)
|
|
return NULL;
|
|
|
|
mdev = minor_to_mdev(minor);
|
|
|
|
if (!mdev && create) {
|
|
struct gendisk *disk = NULL;
|
|
mdev = drbd_new_device(minor);
|
|
|
|
spin_lock_irq(&drbd_pp_lock);
|
|
if (minor_table[minor] == NULL) {
|
|
minor_table[minor] = mdev;
|
|
disk = mdev->vdisk;
|
|
mdev = NULL;
|
|
} /* else: we lost the race */
|
|
spin_unlock_irq(&drbd_pp_lock);
|
|
|
|
if (disk) /* we won the race above */
|
|
/* in case we ever add a drbd_delete_device(),
|
|
* don't forget the del_gendisk! */
|
|
add_disk(disk);
|
|
else /* we lost the race above */
|
|
drbd_free_mdev(mdev);
|
|
|
|
mdev = minor_to_mdev(minor);
|
|
}
|
|
|
|
return mdev;
|
|
}
|
|
|
|
static int drbd_nl_primary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
struct primary primary_args;
|
|
|
|
memset(&primary_args, 0, sizeof(struct primary));
|
|
if (!primary_from_tags(mdev, nlp->tag_list, &primary_args)) {
|
|
reply->ret_code = ERR_MANDATORY_TAG;
|
|
return 0;
|
|
}
|
|
|
|
reply->ret_code =
|
|
drbd_set_role(mdev, R_PRIMARY, primary_args.primary_force);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_secondary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
reply->ret_code = drbd_set_role(mdev, R_SECONDARY, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* initializes the md.*_offset members, so we are able to find
|
|
* the on disk meta data */
|
|
static void drbd_md_set_sector_offsets(struct drbd_conf *mdev,
|
|
struct drbd_backing_dev *bdev)
|
|
{
|
|
sector_t md_size_sect = 0;
|
|
switch (bdev->dc.meta_dev_idx) {
|
|
default:
|
|
/* v07 style fixed size indexed meta data */
|
|
bdev->md.md_size_sect = MD_RESERVED_SECT;
|
|
bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
|
|
bdev->md.al_offset = MD_AL_OFFSET;
|
|
bdev->md.bm_offset = MD_BM_OFFSET;
|
|
break;
|
|
case DRBD_MD_INDEX_FLEX_EXT:
|
|
/* just occupy the full device; unit: sectors */
|
|
bdev->md.md_size_sect = drbd_get_capacity(bdev->md_bdev);
|
|
bdev->md.md_offset = 0;
|
|
bdev->md.al_offset = MD_AL_OFFSET;
|
|
bdev->md.bm_offset = MD_BM_OFFSET;
|
|
break;
|
|
case DRBD_MD_INDEX_INTERNAL:
|
|
case DRBD_MD_INDEX_FLEX_INT:
|
|
bdev->md.md_offset = drbd_md_ss__(mdev, bdev);
|
|
/* al size is still fixed */
|
|
bdev->md.al_offset = -MD_AL_MAX_SIZE;
|
|
/* we need (slightly less than) ~ this much bitmap sectors: */
|
|
md_size_sect = drbd_get_capacity(bdev->backing_bdev);
|
|
md_size_sect = ALIGN(md_size_sect, BM_SECT_PER_EXT);
|
|
md_size_sect = BM_SECT_TO_EXT(md_size_sect);
|
|
md_size_sect = ALIGN(md_size_sect, 8);
|
|
|
|
/* plus the "drbd meta data super block",
|
|
* and the activity log; */
|
|
md_size_sect += MD_BM_OFFSET;
|
|
|
|
bdev->md.md_size_sect = md_size_sect;
|
|
/* bitmap offset is adjusted by 'super' block size */
|
|
bdev->md.bm_offset = -md_size_sect + MD_AL_OFFSET;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* input size is expected to be in KB */
|
|
char *ppsize(char *buf, unsigned long long size)
|
|
{
|
|
/* Needs 9 bytes at max including trailing NUL:
|
|
* -1ULL ==> "16384 EB" */
|
|
static char units[] = { 'K', 'M', 'G', 'T', 'P', 'E' };
|
|
int base = 0;
|
|
while (size >= 10000 && base < sizeof(units)-1) {
|
|
/* shift + round */
|
|
size = (size >> 10) + !!(size & (1<<9));
|
|
base++;
|
|
}
|
|
sprintf(buf, "%u %cB", (unsigned)size, units[base]);
|
|
|
|
return buf;
|
|
}
|
|
|
|
/* there is still a theoretical deadlock when called from receiver
|
|
* on an D_INCONSISTENT R_PRIMARY:
|
|
* remote READ does inc_ap_bio, receiver would need to receive answer
|
|
* packet from remote to dec_ap_bio again.
|
|
* receiver receive_sizes(), comes here,
|
|
* waits for ap_bio_cnt == 0. -> deadlock.
|
|
* but this cannot happen, actually, because:
|
|
* R_PRIMARY D_INCONSISTENT, and peer's disk is unreachable
|
|
* (not connected, or bad/no disk on peer):
|
|
* see drbd_fail_request_early, ap_bio_cnt is zero.
|
|
* R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET:
|
|
* peer may not initiate a resize.
|
|
*/
|
|
void drbd_suspend_io(struct drbd_conf *mdev)
|
|
{
|
|
set_bit(SUSPEND_IO, &mdev->flags);
|
|
if (is_susp(mdev->state))
|
|
return;
|
|
wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_bio_cnt));
|
|
}
|
|
|
|
void drbd_resume_io(struct drbd_conf *mdev)
|
|
{
|
|
clear_bit(SUSPEND_IO, &mdev->flags);
|
|
wake_up(&mdev->misc_wait);
|
|
}
|
|
|
|
/**
|
|
* drbd_determine_dev_size() - Sets the right device size obeying all constraints
|
|
* @mdev: DRBD device.
|
|
*
|
|
* Returns 0 on success, negative return values indicate errors.
|
|
* You should call drbd_md_sync() after calling this function.
|
|
*/
|
|
enum determine_dev_size drbd_determine_dev_size(struct drbd_conf *mdev, enum dds_flags flags) __must_hold(local)
|
|
{
|
|
sector_t prev_first_sect, prev_size; /* previous meta location */
|
|
sector_t la_size;
|
|
sector_t size;
|
|
char ppb[10];
|
|
|
|
int md_moved, la_size_changed;
|
|
enum determine_dev_size rv = unchanged;
|
|
|
|
/* race:
|
|
* application request passes inc_ap_bio,
|
|
* but then cannot get an AL-reference.
|
|
* this function later may wait on ap_bio_cnt == 0. -> deadlock.
|
|
*
|
|
* to avoid that:
|
|
* Suspend IO right here.
|
|
* still lock the act_log to not trigger ASSERTs there.
|
|
*/
|
|
drbd_suspend_io(mdev);
|
|
|
|
/* no wait necessary anymore, actually we could assert that */
|
|
wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
|
|
|
|
prev_first_sect = drbd_md_first_sector(mdev->ldev);
|
|
prev_size = mdev->ldev->md.md_size_sect;
|
|
la_size = mdev->ldev->md.la_size_sect;
|
|
|
|
/* TODO: should only be some assert here, not (re)init... */
|
|
drbd_md_set_sector_offsets(mdev, mdev->ldev);
|
|
|
|
size = drbd_new_dev_size(mdev, mdev->ldev, flags & DDSF_FORCED);
|
|
|
|
if (drbd_get_capacity(mdev->this_bdev) != size ||
|
|
drbd_bm_capacity(mdev) != size) {
|
|
int err;
|
|
err = drbd_bm_resize(mdev, size, !(flags & DDSF_NO_RESYNC));
|
|
if (unlikely(err)) {
|
|
/* currently there is only one error: ENOMEM! */
|
|
size = drbd_bm_capacity(mdev)>>1;
|
|
if (size == 0) {
|
|
dev_err(DEV, "OUT OF MEMORY! "
|
|
"Could not allocate bitmap!\n");
|
|
} else {
|
|
dev_err(DEV, "BM resizing failed. "
|
|
"Leaving size unchanged at size = %lu KB\n",
|
|
(unsigned long)size);
|
|
}
|
|
rv = dev_size_error;
|
|
}
|
|
/* racy, see comments above. */
|
|
drbd_set_my_capacity(mdev, size);
|
|
mdev->ldev->md.la_size_sect = size;
|
|
dev_info(DEV, "size = %s (%llu KB)\n", ppsize(ppb, size>>1),
|
|
(unsigned long long)size>>1);
|
|
}
|
|
if (rv == dev_size_error)
|
|
goto out;
|
|
|
|
la_size_changed = (la_size != mdev->ldev->md.la_size_sect);
|
|
|
|
md_moved = prev_first_sect != drbd_md_first_sector(mdev->ldev)
|
|
|| prev_size != mdev->ldev->md.md_size_sect;
|
|
|
|
if (la_size_changed || md_moved) {
|
|
int err;
|
|
|
|
drbd_al_shrink(mdev); /* All extents inactive. */
|
|
dev_info(DEV, "Writing the whole bitmap, %s\n",
|
|
la_size_changed && md_moved ? "size changed and md moved" :
|
|
la_size_changed ? "size changed" : "md moved");
|
|
/* next line implicitly does drbd_suspend_io()+drbd_resume_io() */
|
|
err = drbd_bitmap_io(mdev, &drbd_bm_write,
|
|
"size changed", BM_LOCKED_MASK);
|
|
if (err) {
|
|
rv = dev_size_error;
|
|
goto out;
|
|
}
|
|
drbd_md_mark_dirty(mdev);
|
|
}
|
|
|
|
if (size > la_size)
|
|
rv = grew;
|
|
if (size < la_size)
|
|
rv = shrunk;
|
|
out:
|
|
lc_unlock(mdev->act_log);
|
|
wake_up(&mdev->al_wait);
|
|
drbd_resume_io(mdev);
|
|
|
|
return rv;
|
|
}
|
|
|
|
sector_t
|
|
drbd_new_dev_size(struct drbd_conf *mdev, struct drbd_backing_dev *bdev, int assume_peer_has_space)
|
|
{
|
|
sector_t p_size = mdev->p_size; /* partner's disk size. */
|
|
sector_t la_size = bdev->md.la_size_sect; /* last agreed size. */
|
|
sector_t m_size; /* my size */
|
|
sector_t u_size = bdev->dc.disk_size; /* size requested by user. */
|
|
sector_t size = 0;
|
|
|
|
m_size = drbd_get_max_capacity(bdev);
|
|
|
|
if (mdev->state.conn < C_CONNECTED && assume_peer_has_space) {
|
|
dev_warn(DEV, "Resize while not connected was forced by the user!\n");
|
|
p_size = m_size;
|
|
}
|
|
|
|
if (p_size && m_size) {
|
|
size = min_t(sector_t, p_size, m_size);
|
|
} else {
|
|
if (la_size) {
|
|
size = la_size;
|
|
if (m_size && m_size < size)
|
|
size = m_size;
|
|
if (p_size && p_size < size)
|
|
size = p_size;
|
|
} else {
|
|
if (m_size)
|
|
size = m_size;
|
|
if (p_size)
|
|
size = p_size;
|
|
}
|
|
}
|
|
|
|
if (size == 0)
|
|
dev_err(DEV, "Both nodes diskless!\n");
|
|
|
|
if (u_size) {
|
|
if (u_size > size)
|
|
dev_err(DEV, "Requested disk size is too big (%lu > %lu)\n",
|
|
(unsigned long)u_size>>1, (unsigned long)size>>1);
|
|
else
|
|
size = u_size;
|
|
}
|
|
|
|
return size;
|
|
}
|
|
|
|
/**
|
|
* drbd_check_al_size() - Ensures that the AL is of the right size
|
|
* @mdev: DRBD device.
|
|
*
|
|
* Returns -EBUSY if current al lru is still used, -ENOMEM when allocation
|
|
* failed, and 0 on success. You should call drbd_md_sync() after you called
|
|
* this function.
|
|
*/
|
|
static int drbd_check_al_size(struct drbd_conf *mdev)
|
|
{
|
|
struct lru_cache *n, *t;
|
|
struct lc_element *e;
|
|
unsigned int in_use;
|
|
int i;
|
|
|
|
ERR_IF(mdev->sync_conf.al_extents < 7)
|
|
mdev->sync_conf.al_extents = 127;
|
|
|
|
if (mdev->act_log &&
|
|
mdev->act_log->nr_elements == mdev->sync_conf.al_extents)
|
|
return 0;
|
|
|
|
in_use = 0;
|
|
t = mdev->act_log;
|
|
n = lc_create("act_log", drbd_al_ext_cache,
|
|
mdev->sync_conf.al_extents, sizeof(struct lc_element), 0);
|
|
|
|
if (n == NULL) {
|
|
dev_err(DEV, "Cannot allocate act_log lru!\n");
|
|
return -ENOMEM;
|
|
}
|
|
spin_lock_irq(&mdev->al_lock);
|
|
if (t) {
|
|
for (i = 0; i < t->nr_elements; i++) {
|
|
e = lc_element_by_index(t, i);
|
|
if (e->refcnt)
|
|
dev_err(DEV, "refcnt(%d)==%d\n",
|
|
e->lc_number, e->refcnt);
|
|
in_use += e->refcnt;
|
|
}
|
|
}
|
|
if (!in_use)
|
|
mdev->act_log = n;
|
|
spin_unlock_irq(&mdev->al_lock);
|
|
if (in_use) {
|
|
dev_err(DEV, "Activity log still in use!\n");
|
|
lc_destroy(n);
|
|
return -EBUSY;
|
|
} else {
|
|
if (t)
|
|
lc_destroy(t);
|
|
}
|
|
drbd_md_mark_dirty(mdev); /* we changed mdev->act_log->nr_elemens */
|
|
return 0;
|
|
}
|
|
|
|
static void drbd_setup_queue_param(struct drbd_conf *mdev, unsigned int max_bio_size)
|
|
{
|
|
struct request_queue * const q = mdev->rq_queue;
|
|
int max_hw_sectors = max_bio_size >> 9;
|
|
int max_segments = 0;
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
|
|
|
|
max_hw_sectors = min(queue_max_hw_sectors(b), max_bio_size >> 9);
|
|
max_segments = mdev->ldev->dc.max_bio_bvecs;
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
blk_queue_logical_block_size(q, 512);
|
|
blk_queue_max_hw_sectors(q, max_hw_sectors);
|
|
/* This is the workaround for "bio would need to, but cannot, be split" */
|
|
blk_queue_max_segments(q, max_segments ? max_segments : BLK_MAX_SEGMENTS);
|
|
blk_queue_segment_boundary(q, PAGE_CACHE_SIZE-1);
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
struct request_queue * const b = mdev->ldev->backing_bdev->bd_disk->queue;
|
|
|
|
blk_queue_stack_limits(q, b);
|
|
|
|
if (q->backing_dev_info.ra_pages != b->backing_dev_info.ra_pages) {
|
|
dev_info(DEV, "Adjusting my ra_pages to backing device's (%lu -> %lu)\n",
|
|
q->backing_dev_info.ra_pages,
|
|
b->backing_dev_info.ra_pages);
|
|
q->backing_dev_info.ra_pages = b->backing_dev_info.ra_pages;
|
|
}
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
|
|
void drbd_reconsider_max_bio_size(struct drbd_conf *mdev)
|
|
{
|
|
int now, new, local, peer;
|
|
|
|
now = queue_max_hw_sectors(mdev->rq_queue) << 9;
|
|
local = mdev->local_max_bio_size; /* Eventually last known value, from volatile memory */
|
|
peer = mdev->peer_max_bio_size; /* Eventually last known value, from meta data */
|
|
|
|
if (get_ldev_if_state(mdev, D_ATTACHING)) {
|
|
local = queue_max_hw_sectors(mdev->ldev->backing_bdev->bd_disk->queue) << 9;
|
|
mdev->local_max_bio_size = local;
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
/* We may ignore peer limits if the peer is modern enough.
|
|
Because new from 8.3.8 onwards the peer can use multiple
|
|
BIOs for a single peer_request */
|
|
if (mdev->state.conn >= C_CONNECTED) {
|
|
if (mdev->agreed_pro_version < 94)
|
|
peer = mdev->peer_max_bio_size;
|
|
else if (mdev->agreed_pro_version == 94)
|
|
peer = DRBD_MAX_SIZE_H80_PACKET;
|
|
else /* drbd 8.3.8 onwards */
|
|
peer = DRBD_MAX_BIO_SIZE;
|
|
}
|
|
|
|
new = min_t(int, local, peer);
|
|
|
|
if (mdev->state.role == R_PRIMARY && new < now)
|
|
dev_err(DEV, "ASSERT FAILED new < now; (%d < %d)\n", new, now);
|
|
|
|
if (new != now)
|
|
dev_info(DEV, "max BIO size = %u\n", new);
|
|
|
|
drbd_setup_queue_param(mdev, new);
|
|
}
|
|
|
|
/* serialize deconfig (worker exiting, doing cleanup)
|
|
* and reconfig (drbdsetup disk, drbdsetup net)
|
|
*
|
|
* Wait for a potentially exiting worker, then restart it,
|
|
* or start a new one. Flush any pending work, there may still be an
|
|
* after_state_change queued.
|
|
*/
|
|
static void drbd_reconfig_start(struct drbd_conf *mdev)
|
|
{
|
|
wait_event(mdev->state_wait, !test_and_set_bit(CONFIG_PENDING, &mdev->flags));
|
|
wait_event(mdev->state_wait, !test_bit(DEVICE_DYING, &mdev->flags));
|
|
drbd_thread_start(&mdev->worker);
|
|
drbd_flush_workqueue(mdev);
|
|
}
|
|
|
|
/* if still unconfigured, stops worker again.
|
|
* if configured now, clears CONFIG_PENDING.
|
|
* wakes potential waiters */
|
|
static void drbd_reconfig_done(struct drbd_conf *mdev)
|
|
{
|
|
spin_lock_irq(&mdev->req_lock);
|
|
if (mdev->state.disk == D_DISKLESS &&
|
|
mdev->state.conn == C_STANDALONE &&
|
|
mdev->state.role == R_SECONDARY) {
|
|
set_bit(DEVICE_DYING, &mdev->flags);
|
|
drbd_thread_stop_nowait(&mdev->worker);
|
|
} else
|
|
clear_bit(CONFIG_PENDING, &mdev->flags);
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
wake_up(&mdev->state_wait);
|
|
}
|
|
|
|
/* Make sure IO is suspended before calling this function(). */
|
|
static void drbd_suspend_al(struct drbd_conf *mdev)
|
|
{
|
|
int s = 0;
|
|
|
|
if (lc_try_lock(mdev->act_log)) {
|
|
drbd_al_shrink(mdev);
|
|
lc_unlock(mdev->act_log);
|
|
} else {
|
|
dev_warn(DEV, "Failed to lock al in drbd_suspend_al()\n");
|
|
return;
|
|
}
|
|
|
|
spin_lock_irq(&mdev->req_lock);
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
s = !test_and_set_bit(AL_SUSPENDED, &mdev->flags);
|
|
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
|
|
if (s)
|
|
dev_info(DEV, "Suspended AL updates\n");
|
|
}
|
|
|
|
/* does always return 0;
|
|
* interesting return code is in reply->ret_code */
|
|
static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
enum determine_dev_size dd;
|
|
sector_t max_possible_sectors;
|
|
sector_t min_md_device_sectors;
|
|
struct drbd_backing_dev *nbc = NULL; /* new_backing_conf */
|
|
struct block_device *bdev;
|
|
struct lru_cache *resync_lru = NULL;
|
|
union drbd_state ns, os;
|
|
enum drbd_state_rv rv;
|
|
int cp_discovered = 0;
|
|
int logical_block_size;
|
|
|
|
drbd_reconfig_start(mdev);
|
|
|
|
/* if you want to reconfigure, please tear down first */
|
|
if (mdev->state.disk > D_DISKLESS) {
|
|
retcode = ERR_DISK_CONFIGURED;
|
|
goto fail;
|
|
}
|
|
/* It may just now have detached because of IO error. Make sure
|
|
* drbd_ldev_destroy is done already, we may end up here very fast,
|
|
* e.g. if someone calls attach from the on-io-error handler,
|
|
* to realize a "hot spare" feature (not that I'd recommend that) */
|
|
wait_event(mdev->misc_wait, !atomic_read(&mdev->local_cnt));
|
|
|
|
/* allocation not in the IO path, cqueue thread context */
|
|
nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL);
|
|
if (!nbc) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
nbc->dc.disk_size = DRBD_DISK_SIZE_SECT_DEF;
|
|
nbc->dc.on_io_error = DRBD_ON_IO_ERROR_DEF;
|
|
nbc->dc.fencing = DRBD_FENCING_DEF;
|
|
nbc->dc.max_bio_bvecs = DRBD_MAX_BIO_BVECS_DEF;
|
|
|
|
if (!disk_conf_from_tags(mdev, nlp->tag_list, &nbc->dc)) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
goto fail;
|
|
}
|
|
|
|
if (nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) {
|
|
retcode = ERR_MD_IDX_INVALID;
|
|
goto fail;
|
|
}
|
|
|
|
if (get_net_conf(mdev)) {
|
|
int prot = mdev->net_conf->wire_protocol;
|
|
put_net_conf(mdev);
|
|
if (nbc->dc.fencing == FP_STONITH && prot == DRBD_PROT_A) {
|
|
retcode = ERR_STONITH_AND_PROT_A;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
bdev = blkdev_get_by_path(nbc->dc.backing_dev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL, mdev);
|
|
if (IS_ERR(bdev)) {
|
|
dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.backing_dev,
|
|
PTR_ERR(bdev));
|
|
retcode = ERR_OPEN_DISK;
|
|
goto fail;
|
|
}
|
|
nbc->backing_bdev = bdev;
|
|
|
|
/*
|
|
* meta_dev_idx >= 0: external fixed size, possibly multiple
|
|
* drbd sharing one meta device. TODO in that case, paranoia
|
|
* check that [md_bdev, meta_dev_idx] is not yet used by some
|
|
* other drbd minor! (if you use drbd.conf + drbdadm, that
|
|
* should check it for you already; but if you don't, or
|
|
* someone fooled it, we need to double check here)
|
|
*/
|
|
bdev = blkdev_get_by_path(nbc->dc.meta_dev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL,
|
|
(nbc->dc.meta_dev_idx < 0) ?
|
|
(void *)mdev : (void *)drbd_m_holder);
|
|
if (IS_ERR(bdev)) {
|
|
dev_err(DEV, "open(\"%s\") failed with %ld\n", nbc->dc.meta_dev,
|
|
PTR_ERR(bdev));
|
|
retcode = ERR_OPEN_MD_DISK;
|
|
goto fail;
|
|
}
|
|
nbc->md_bdev = bdev;
|
|
|
|
if ((nbc->backing_bdev == nbc->md_bdev) !=
|
|
(nbc->dc.meta_dev_idx == DRBD_MD_INDEX_INTERNAL ||
|
|
nbc->dc.meta_dev_idx == DRBD_MD_INDEX_FLEX_INT)) {
|
|
retcode = ERR_MD_IDX_INVALID;
|
|
goto fail;
|
|
}
|
|
|
|
resync_lru = lc_create("resync", drbd_bm_ext_cache,
|
|
61, sizeof(struct bm_extent),
|
|
offsetof(struct bm_extent, lce));
|
|
if (!resync_lru) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
/* RT - for drbd_get_max_capacity() DRBD_MD_INDEX_FLEX_INT */
|
|
drbd_md_set_sector_offsets(mdev, nbc);
|
|
|
|
if (drbd_get_max_capacity(nbc) < nbc->dc.disk_size) {
|
|
dev_err(DEV, "max capacity %llu smaller than disk size %llu\n",
|
|
(unsigned long long) drbd_get_max_capacity(nbc),
|
|
(unsigned long long) nbc->dc.disk_size);
|
|
retcode = ERR_DISK_TO_SMALL;
|
|
goto fail;
|
|
}
|
|
|
|
if (nbc->dc.meta_dev_idx < 0) {
|
|
max_possible_sectors = DRBD_MAX_SECTORS_FLEX;
|
|
/* at least one MB, otherwise it does not make sense */
|
|
min_md_device_sectors = (2<<10);
|
|
} else {
|
|
max_possible_sectors = DRBD_MAX_SECTORS;
|
|
min_md_device_sectors = MD_RESERVED_SECT * (nbc->dc.meta_dev_idx + 1);
|
|
}
|
|
|
|
if (drbd_get_capacity(nbc->md_bdev) < min_md_device_sectors) {
|
|
retcode = ERR_MD_DISK_TO_SMALL;
|
|
dev_warn(DEV, "refusing attach: md-device too small, "
|
|
"at least %llu sectors needed for this meta-disk type\n",
|
|
(unsigned long long) min_md_device_sectors);
|
|
goto fail;
|
|
}
|
|
|
|
/* Make sure the new disk is big enough
|
|
* (we may currently be R_PRIMARY with no local disk...) */
|
|
if (drbd_get_max_capacity(nbc) <
|
|
drbd_get_capacity(mdev->this_bdev)) {
|
|
retcode = ERR_DISK_TO_SMALL;
|
|
goto fail;
|
|
}
|
|
|
|
nbc->known_size = drbd_get_capacity(nbc->backing_bdev);
|
|
|
|
if (nbc->known_size > max_possible_sectors) {
|
|
dev_warn(DEV, "==> truncating very big lower level device "
|
|
"to currently maximum possible %llu sectors <==\n",
|
|
(unsigned long long) max_possible_sectors);
|
|
if (nbc->dc.meta_dev_idx >= 0)
|
|
dev_warn(DEV, "==>> using internal or flexible "
|
|
"meta data may help <<==\n");
|
|
}
|
|
|
|
drbd_suspend_io(mdev);
|
|
/* also wait for the last barrier ack. */
|
|
wait_event(mdev->misc_wait, !atomic_read(&mdev->ap_pending_cnt) || is_susp(mdev->state));
|
|
/* and for any other previously queued work */
|
|
drbd_flush_workqueue(mdev);
|
|
|
|
rv = _drbd_request_state(mdev, NS(disk, D_ATTACHING), CS_VERBOSE);
|
|
retcode = rv; /* FIXME: Type mismatch. */
|
|
drbd_resume_io(mdev);
|
|
if (rv < SS_SUCCESS)
|
|
goto fail;
|
|
|
|
if (!get_ldev_if_state(mdev, D_ATTACHING))
|
|
goto force_diskless;
|
|
|
|
drbd_md_set_sector_offsets(mdev, nbc);
|
|
|
|
/* allocate a second IO page if logical_block_size != 512 */
|
|
logical_block_size = bdev_logical_block_size(nbc->md_bdev);
|
|
if (logical_block_size == 0)
|
|
logical_block_size = MD_SECTOR_SIZE;
|
|
|
|
if (logical_block_size != MD_SECTOR_SIZE) {
|
|
if (!mdev->md_io_tmpp) {
|
|
struct page *page = alloc_page(GFP_NOIO);
|
|
if (!page)
|
|
goto force_diskless_dec;
|
|
|
|
dev_warn(DEV, "Meta data's bdev logical_block_size = %d != %d\n",
|
|
logical_block_size, MD_SECTOR_SIZE);
|
|
dev_warn(DEV, "Workaround engaged (has performance impact).\n");
|
|
|
|
mdev->md_io_tmpp = page;
|
|
}
|
|
}
|
|
|
|
if (!mdev->bitmap) {
|
|
if (drbd_bm_init(mdev)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
retcode = drbd_md_read(mdev, nbc);
|
|
if (retcode != NO_ERROR)
|
|
goto force_diskless_dec;
|
|
|
|
if (mdev->state.conn < C_CONNECTED &&
|
|
mdev->state.role == R_PRIMARY &&
|
|
(mdev->ed_uuid & ~((u64)1)) != (nbc->md.uuid[UI_CURRENT] & ~((u64)1))) {
|
|
dev_err(DEV, "Can only attach to data with current UUID=%016llX\n",
|
|
(unsigned long long)mdev->ed_uuid);
|
|
retcode = ERR_DATA_NOT_CURRENT;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Since we are diskless, fix the activity log first... */
|
|
if (drbd_check_al_size(mdev)) {
|
|
retcode = ERR_NOMEM;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Prevent shrinking of consistent devices ! */
|
|
if (drbd_md_test_flag(nbc, MDF_CONSISTENT) &&
|
|
drbd_new_dev_size(mdev, nbc, 0) < nbc->md.la_size_sect) {
|
|
dev_warn(DEV, "refusing to truncate a consistent device\n");
|
|
retcode = ERR_DISK_TO_SMALL;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
if (!drbd_al_read_log(mdev, nbc)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
|
|
/* Reset the "barriers don't work" bits here, then force meta data to
|
|
* be written, to ensure we determine if barriers are supported. */
|
|
if (nbc->dc.no_md_flush)
|
|
set_bit(MD_NO_FUA, &mdev->flags);
|
|
else
|
|
clear_bit(MD_NO_FUA, &mdev->flags);
|
|
|
|
/* Point of no return reached.
|
|
* Devices and memory are no longer released by error cleanup below.
|
|
* now mdev takes over responsibility, and the state engine should
|
|
* clean it up somewhere. */
|
|
D_ASSERT(mdev->ldev == NULL);
|
|
mdev->ldev = nbc;
|
|
mdev->resync = resync_lru;
|
|
nbc = NULL;
|
|
resync_lru = NULL;
|
|
|
|
mdev->write_ordering = WO_bdev_flush;
|
|
drbd_bump_write_ordering(mdev, WO_bdev_flush);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_CRASHED_PRIMARY))
|
|
set_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
else
|
|
clear_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
|
|
!(mdev->state.role == R_PRIMARY && mdev->state.susp_nod)) {
|
|
set_bit(CRASHED_PRIMARY, &mdev->flags);
|
|
cp_discovered = 1;
|
|
}
|
|
|
|
mdev->send_cnt = 0;
|
|
mdev->recv_cnt = 0;
|
|
mdev->read_cnt = 0;
|
|
mdev->writ_cnt = 0;
|
|
|
|
drbd_reconsider_max_bio_size(mdev);
|
|
|
|
/* If I am currently not R_PRIMARY,
|
|
* but meta data primary indicator is set,
|
|
* I just now recover from a hard crash,
|
|
* and have been R_PRIMARY before that crash.
|
|
*
|
|
* Now, if I had no connection before that crash
|
|
* (have been degraded R_PRIMARY), chances are that
|
|
* I won't find my peer now either.
|
|
*
|
|
* In that case, and _only_ in that case,
|
|
* we use the degr-wfc-timeout instead of the default,
|
|
* so we can automatically recover from a crash of a
|
|
* degraded but active "cluster" after a certain timeout.
|
|
*/
|
|
clear_bit(USE_DEGR_WFC_T, &mdev->flags);
|
|
if (mdev->state.role != R_PRIMARY &&
|
|
drbd_md_test_flag(mdev->ldev, MDF_PRIMARY_IND) &&
|
|
!drbd_md_test_flag(mdev->ldev, MDF_CONNECTED_IND))
|
|
set_bit(USE_DEGR_WFC_T, &mdev->flags);
|
|
|
|
dd = drbd_determine_dev_size(mdev, 0);
|
|
if (dd == dev_size_error) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto force_diskless_dec;
|
|
} else if (dd == grew)
|
|
set_bit(RESYNC_AFTER_NEG, &mdev->flags);
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_FULL_SYNC)) {
|
|
dev_info(DEV, "Assuming that all blocks are out of sync "
|
|
"(aka FullSync)\n");
|
|
if (drbd_bitmap_io(mdev, &drbd_bmio_set_n_write,
|
|
"set_n_write from attaching", BM_LOCKED_MASK)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
} else {
|
|
if (drbd_bitmap_io(mdev, &drbd_bm_read,
|
|
"read from attaching", BM_LOCKED_MASK) < 0) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
if (cp_discovered) {
|
|
drbd_al_apply_to_bm(mdev);
|
|
if (drbd_bitmap_io(mdev, &drbd_bm_write,
|
|
"crashed primary apply AL", BM_LOCKED_MASK)) {
|
|
retcode = ERR_IO_MD_DISK;
|
|
goto force_diskless_dec;
|
|
}
|
|
}
|
|
|
|
if (_drbd_bm_total_weight(mdev) == drbd_bm_bits(mdev))
|
|
drbd_suspend_al(mdev); /* IO is still suspended here... */
|
|
|
|
spin_lock_irq(&mdev->req_lock);
|
|
os = mdev->state;
|
|
ns.i = os.i;
|
|
/* If MDF_CONSISTENT is not set go into inconsistent state,
|
|
otherwise investigate MDF_WasUpToDate...
|
|
If MDF_WAS_UP_TO_DATE is not set go into D_OUTDATED disk state,
|
|
otherwise into D_CONSISTENT state.
|
|
*/
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_CONSISTENT)) {
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_WAS_UP_TO_DATE))
|
|
ns.disk = D_CONSISTENT;
|
|
else
|
|
ns.disk = D_OUTDATED;
|
|
} else {
|
|
ns.disk = D_INCONSISTENT;
|
|
}
|
|
|
|
if (drbd_md_test_flag(mdev->ldev, MDF_PEER_OUT_DATED))
|
|
ns.pdsk = D_OUTDATED;
|
|
|
|
if ( ns.disk == D_CONSISTENT &&
|
|
(ns.pdsk == D_OUTDATED || mdev->ldev->dc.fencing == FP_DONT_CARE))
|
|
ns.disk = D_UP_TO_DATE;
|
|
|
|
/* All tests on MDF_PRIMARY_IND, MDF_CONNECTED_IND,
|
|
MDF_CONSISTENT and MDF_WAS_UP_TO_DATE must happen before
|
|
this point, because drbd_request_state() modifies these
|
|
flags. */
|
|
|
|
/* In case we are C_CONNECTED postpone any decision on the new disk
|
|
state after the negotiation phase. */
|
|
if (mdev->state.conn == C_CONNECTED) {
|
|
mdev->new_state_tmp.i = ns.i;
|
|
ns.i = os.i;
|
|
ns.disk = D_NEGOTIATING;
|
|
|
|
/* We expect to receive up-to-date UUIDs soon.
|
|
To avoid a race in receive_state, free p_uuid while
|
|
holding req_lock. I.e. atomic with the state change */
|
|
kfree(mdev->p_uuid);
|
|
mdev->p_uuid = NULL;
|
|
}
|
|
|
|
rv = _drbd_set_state(mdev, ns, CS_VERBOSE, NULL);
|
|
ns = mdev->state;
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
|
|
if (rv < SS_SUCCESS)
|
|
goto force_diskless_dec;
|
|
|
|
if (mdev->state.role == R_PRIMARY)
|
|
mdev->ldev->md.uuid[UI_CURRENT] |= (u64)1;
|
|
else
|
|
mdev->ldev->md.uuid[UI_CURRENT] &= ~(u64)1;
|
|
|
|
drbd_md_mark_dirty(mdev);
|
|
drbd_md_sync(mdev);
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
put_ldev(mdev);
|
|
reply->ret_code = retcode;
|
|
drbd_reconfig_done(mdev);
|
|
return 0;
|
|
|
|
force_diskless_dec:
|
|
put_ldev(mdev);
|
|
force_diskless:
|
|
drbd_force_state(mdev, NS(disk, D_FAILED));
|
|
drbd_md_sync(mdev);
|
|
fail:
|
|
if (nbc) {
|
|
if (nbc->backing_bdev)
|
|
blkdev_put(nbc->backing_bdev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
if (nbc->md_bdev)
|
|
blkdev_put(nbc->md_bdev,
|
|
FMODE_READ | FMODE_WRITE | FMODE_EXCL);
|
|
kfree(nbc);
|
|
}
|
|
lc_destroy(resync_lru);
|
|
|
|
reply->ret_code = retcode;
|
|
drbd_reconfig_done(mdev);
|
|
return 0;
|
|
}
|
|
|
|
/* Detaching the disk is a process in multiple stages. First we need to lock
|
|
* out application IO, in-flight IO, IO stuck in drbd_al_begin_io.
|
|
* Then we transition to D_DISKLESS, and wait for put_ldev() to return all
|
|
* internal references as well.
|
|
* Only then we have finally detached. */
|
|
static int drbd_nl_detach(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
enum drbd_ret_code retcode;
|
|
int ret;
|
|
drbd_suspend_io(mdev); /* so no-one is stuck in drbd_al_begin_io */
|
|
retcode = drbd_request_state(mdev, NS(disk, D_FAILED));
|
|
/* D_FAILED will transition to DISKLESS. */
|
|
ret = wait_event_interruptible(mdev->misc_wait,
|
|
mdev->state.disk != D_FAILED);
|
|
drbd_resume_io(mdev);
|
|
if ((int)retcode == (int)SS_IS_DISKLESS)
|
|
retcode = SS_NOTHING_TO_DO;
|
|
if (ret)
|
|
retcode = ERR_INTR;
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_net_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int i, ns;
|
|
enum drbd_ret_code retcode;
|
|
struct net_conf *new_conf = NULL;
|
|
struct crypto_hash *tfm = NULL;
|
|
struct crypto_hash *integrity_w_tfm = NULL;
|
|
struct crypto_hash *integrity_r_tfm = NULL;
|
|
struct hlist_head *new_tl_hash = NULL;
|
|
struct hlist_head *new_ee_hash = NULL;
|
|
struct drbd_conf *odev;
|
|
char hmac_name[CRYPTO_MAX_ALG_NAME];
|
|
void *int_dig_out = NULL;
|
|
void *int_dig_in = NULL;
|
|
void *int_dig_vv = NULL;
|
|
struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr;
|
|
|
|
drbd_reconfig_start(mdev);
|
|
|
|
if (mdev->state.conn > C_STANDALONE) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
goto fail;
|
|
}
|
|
|
|
/* allocation not in the IO path, cqueue thread context */
|
|
new_conf = kzalloc(sizeof(struct net_conf), GFP_KERNEL);
|
|
if (!new_conf) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
new_conf->timeout = DRBD_TIMEOUT_DEF;
|
|
new_conf->try_connect_int = DRBD_CONNECT_INT_DEF;
|
|
new_conf->ping_int = DRBD_PING_INT_DEF;
|
|
new_conf->max_epoch_size = DRBD_MAX_EPOCH_SIZE_DEF;
|
|
new_conf->max_buffers = DRBD_MAX_BUFFERS_DEF;
|
|
new_conf->unplug_watermark = DRBD_UNPLUG_WATERMARK_DEF;
|
|
new_conf->sndbuf_size = DRBD_SNDBUF_SIZE_DEF;
|
|
new_conf->rcvbuf_size = DRBD_RCVBUF_SIZE_DEF;
|
|
new_conf->ko_count = DRBD_KO_COUNT_DEF;
|
|
new_conf->after_sb_0p = DRBD_AFTER_SB_0P_DEF;
|
|
new_conf->after_sb_1p = DRBD_AFTER_SB_1P_DEF;
|
|
new_conf->after_sb_2p = DRBD_AFTER_SB_2P_DEF;
|
|
new_conf->want_lose = 0;
|
|
new_conf->two_primaries = 0;
|
|
new_conf->wire_protocol = DRBD_PROT_C;
|
|
new_conf->ping_timeo = DRBD_PING_TIMEO_DEF;
|
|
new_conf->rr_conflict = DRBD_RR_CONFLICT_DEF;
|
|
new_conf->on_congestion = DRBD_ON_CONGESTION_DEF;
|
|
new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF;
|
|
|
|
if (!net_conf_from_tags(mdev, nlp->tag_list, new_conf)) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
goto fail;
|
|
}
|
|
|
|
if (new_conf->two_primaries
|
|
&& (new_conf->wire_protocol != DRBD_PROT_C)) {
|
|
retcode = ERR_NOT_PROTO_C;
|
|
goto fail;
|
|
}
|
|
|
|
if (get_ldev(mdev)) {
|
|
enum drbd_fencing_p fp = mdev->ldev->dc.fencing;
|
|
put_ldev(mdev);
|
|
if (new_conf->wire_protocol == DRBD_PROT_A && fp == FP_STONITH) {
|
|
retcode = ERR_STONITH_AND_PROT_A;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (new_conf->on_congestion != OC_BLOCK && new_conf->wire_protocol != DRBD_PROT_A) {
|
|
retcode = ERR_CONG_NOT_PROTO_A;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.role == R_PRIMARY && new_conf->want_lose) {
|
|
retcode = ERR_DISCARD;
|
|
goto fail;
|
|
}
|
|
|
|
retcode = NO_ERROR;
|
|
|
|
new_my_addr = (struct sockaddr *)&new_conf->my_addr;
|
|
new_peer_addr = (struct sockaddr *)&new_conf->peer_addr;
|
|
for (i = 0; i < minor_count; i++) {
|
|
odev = minor_to_mdev(i);
|
|
if (!odev || odev == mdev)
|
|
continue;
|
|
if (get_net_conf(odev)) {
|
|
taken_addr = (struct sockaddr *)&odev->net_conf->my_addr;
|
|
if (new_conf->my_addr_len == odev->net_conf->my_addr_len &&
|
|
!memcmp(new_my_addr, taken_addr, new_conf->my_addr_len))
|
|
retcode = ERR_LOCAL_ADDR;
|
|
|
|
taken_addr = (struct sockaddr *)&odev->net_conf->peer_addr;
|
|
if (new_conf->peer_addr_len == odev->net_conf->peer_addr_len &&
|
|
!memcmp(new_peer_addr, taken_addr, new_conf->peer_addr_len))
|
|
retcode = ERR_PEER_ADDR;
|
|
|
|
put_net_conf(odev);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (new_conf->cram_hmac_alg[0] != 0) {
|
|
snprintf(hmac_name, CRYPTO_MAX_ALG_NAME, "hmac(%s)",
|
|
new_conf->cram_hmac_alg);
|
|
tfm = crypto_alloc_hash(hmac_name, 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(tfm)) {
|
|
tfm = NULL;
|
|
retcode = ERR_AUTH_ALG;
|
|
goto fail;
|
|
}
|
|
|
|
if (!drbd_crypto_is_hash(crypto_hash_tfm(tfm))) {
|
|
retcode = ERR_AUTH_ALG_ND;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (new_conf->integrity_alg[0]) {
|
|
integrity_w_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(integrity_w_tfm)) {
|
|
integrity_w_tfm = NULL;
|
|
retcode=ERR_INTEGRITY_ALG;
|
|
goto fail;
|
|
}
|
|
|
|
if (!drbd_crypto_is_hash(crypto_hash_tfm(integrity_w_tfm))) {
|
|
retcode=ERR_INTEGRITY_ALG_ND;
|
|
goto fail;
|
|
}
|
|
|
|
integrity_r_tfm = crypto_alloc_hash(new_conf->integrity_alg, 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(integrity_r_tfm)) {
|
|
integrity_r_tfm = NULL;
|
|
retcode=ERR_INTEGRITY_ALG;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
ns = new_conf->max_epoch_size/8;
|
|
if (mdev->tl_hash_s != ns) {
|
|
new_tl_hash = kzalloc(ns*sizeof(void *), GFP_KERNEL);
|
|
if (!new_tl_hash) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
ns = new_conf->max_buffers/8;
|
|
if (new_conf->two_primaries && (mdev->ee_hash_s != ns)) {
|
|
new_ee_hash = kzalloc(ns*sizeof(void *), GFP_KERNEL);
|
|
if (!new_ee_hash) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
((char *)new_conf->shared_secret)[SHARED_SECRET_MAX-1] = 0;
|
|
|
|
if (integrity_w_tfm) {
|
|
i = crypto_hash_digestsize(integrity_w_tfm);
|
|
int_dig_out = kmalloc(i, GFP_KERNEL);
|
|
if (!int_dig_out) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
int_dig_in = kmalloc(i, GFP_KERNEL);
|
|
if (!int_dig_in) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
int_dig_vv = kmalloc(i, GFP_KERNEL);
|
|
if (!int_dig_vv) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (!mdev->bitmap) {
|
|
if(drbd_bm_init(mdev)) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
drbd_flush_workqueue(mdev);
|
|
spin_lock_irq(&mdev->req_lock);
|
|
if (mdev->net_conf != NULL) {
|
|
retcode = ERR_NET_CONFIGURED;
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
goto fail;
|
|
}
|
|
mdev->net_conf = new_conf;
|
|
|
|
mdev->send_cnt = 0;
|
|
mdev->recv_cnt = 0;
|
|
|
|
if (new_tl_hash) {
|
|
kfree(mdev->tl_hash);
|
|
mdev->tl_hash_s = mdev->net_conf->max_epoch_size/8;
|
|
mdev->tl_hash = new_tl_hash;
|
|
}
|
|
|
|
if (new_ee_hash) {
|
|
kfree(mdev->ee_hash);
|
|
mdev->ee_hash_s = mdev->net_conf->max_buffers/8;
|
|
mdev->ee_hash = new_ee_hash;
|
|
}
|
|
|
|
crypto_free_hash(mdev->cram_hmac_tfm);
|
|
mdev->cram_hmac_tfm = tfm;
|
|
|
|
crypto_free_hash(mdev->integrity_w_tfm);
|
|
mdev->integrity_w_tfm = integrity_w_tfm;
|
|
|
|
crypto_free_hash(mdev->integrity_r_tfm);
|
|
mdev->integrity_r_tfm = integrity_r_tfm;
|
|
|
|
kfree(mdev->int_dig_out);
|
|
kfree(mdev->int_dig_in);
|
|
kfree(mdev->int_dig_vv);
|
|
mdev->int_dig_out=int_dig_out;
|
|
mdev->int_dig_in=int_dig_in;
|
|
mdev->int_dig_vv=int_dig_vv;
|
|
retcode = _drbd_set_state(_NS(mdev, conn, C_UNCONNECTED), CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
reply->ret_code = retcode;
|
|
drbd_reconfig_done(mdev);
|
|
return 0;
|
|
|
|
fail:
|
|
kfree(int_dig_out);
|
|
kfree(int_dig_in);
|
|
kfree(int_dig_vv);
|
|
crypto_free_hash(tfm);
|
|
crypto_free_hash(integrity_w_tfm);
|
|
crypto_free_hash(integrity_r_tfm);
|
|
kfree(new_tl_hash);
|
|
kfree(new_ee_hash);
|
|
kfree(new_conf);
|
|
|
|
reply->ret_code = retcode;
|
|
drbd_reconfig_done(mdev);
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_disconnect(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode;
|
|
struct disconnect dc;
|
|
|
|
memset(&dc, 0, sizeof(struct disconnect));
|
|
if (!disconnect_from_tags(mdev, nlp->tag_list, &dc)) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
goto fail;
|
|
}
|
|
|
|
if (dc.force) {
|
|
spin_lock_irq(&mdev->req_lock);
|
|
if (mdev->state.conn >= C_WF_CONNECTION)
|
|
_drbd_set_state(_NS(mdev, conn, C_DISCONNECTING), CS_HARD, NULL);
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
goto done;
|
|
}
|
|
|
|
retcode = _drbd_request_state(mdev, NS(conn, C_DISCONNECTING), CS_ORDERED);
|
|
|
|
if (retcode == SS_NOTHING_TO_DO)
|
|
goto done;
|
|
else if (retcode == SS_ALREADY_STANDALONE)
|
|
goto done;
|
|
else if (retcode == SS_PRIMARY_NOP) {
|
|
/* Our statche checking code wants to see the peer outdated. */
|
|
retcode = drbd_request_state(mdev, NS2(conn, C_DISCONNECTING,
|
|
pdsk, D_OUTDATED));
|
|
} else if (retcode == SS_CW_FAILED_BY_PEER) {
|
|
/* The peer probably wants to see us outdated. */
|
|
retcode = _drbd_request_state(mdev, NS2(conn, C_DISCONNECTING,
|
|
disk, D_OUTDATED),
|
|
CS_ORDERED);
|
|
if (retcode == SS_IS_DISKLESS || retcode == SS_LOWER_THAN_OUTDATED) {
|
|
drbd_force_state(mdev, NS(conn, C_DISCONNECTING));
|
|
retcode = SS_SUCCESS;
|
|
}
|
|
}
|
|
|
|
if (retcode < SS_SUCCESS)
|
|
goto fail;
|
|
|
|
if (wait_event_interruptible(mdev->state_wait,
|
|
mdev->state.conn != C_DISCONNECTING)) {
|
|
/* Do not test for mdev->state.conn == C_STANDALONE, since
|
|
someone else might connect us in the mean time! */
|
|
retcode = ERR_INTR;
|
|
goto fail;
|
|
}
|
|
|
|
done:
|
|
retcode = NO_ERROR;
|
|
fail:
|
|
drbd_md_sync(mdev);
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
void resync_after_online_grow(struct drbd_conf *mdev)
|
|
{
|
|
int iass; /* I am sync source */
|
|
|
|
dev_info(DEV, "Resync of new storage after online grow\n");
|
|
if (mdev->state.role != mdev->state.peer)
|
|
iass = (mdev->state.role == R_PRIMARY);
|
|
else
|
|
iass = test_bit(DISCARD_CONCURRENT, &mdev->flags);
|
|
|
|
if (iass)
|
|
drbd_start_resync(mdev, C_SYNC_SOURCE);
|
|
else
|
|
_drbd_request_state(mdev, NS(conn, C_WF_SYNC_UUID), CS_VERBOSE + CS_SERIALIZE);
|
|
}
|
|
|
|
static int drbd_nl_resize(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
struct resize rs;
|
|
int retcode = NO_ERROR;
|
|
enum determine_dev_size dd;
|
|
enum dds_flags ddsf;
|
|
|
|
memset(&rs, 0, sizeof(struct resize));
|
|
if (!resize_from_tags(mdev, nlp->tag_list, &rs)) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.conn > C_CONNECTED) {
|
|
retcode = ERR_RESIZE_RESYNC;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.role == R_SECONDARY &&
|
|
mdev->state.peer == R_SECONDARY) {
|
|
retcode = ERR_NO_PRIMARY;
|
|
goto fail;
|
|
}
|
|
|
|
if (!get_ldev(mdev)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto fail;
|
|
}
|
|
|
|
if (rs.no_resync && mdev->agreed_pro_version < 93) {
|
|
retcode = ERR_NEED_APV_93;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->ldev->known_size != drbd_get_capacity(mdev->ldev->backing_bdev))
|
|
mdev->ldev->known_size = drbd_get_capacity(mdev->ldev->backing_bdev);
|
|
|
|
mdev->ldev->dc.disk_size = (sector_t)rs.resize_size;
|
|
ddsf = (rs.resize_force ? DDSF_FORCED : 0) | (rs.no_resync ? DDSF_NO_RESYNC : 0);
|
|
dd = drbd_determine_dev_size(mdev, ddsf);
|
|
drbd_md_sync(mdev);
|
|
put_ldev(mdev);
|
|
if (dd == dev_size_error) {
|
|
retcode = ERR_NOMEM_BITMAP;
|
|
goto fail;
|
|
}
|
|
|
|
if (mdev->state.conn == C_CONNECTED) {
|
|
if (dd == grew)
|
|
set_bit(RESIZE_PENDING, &mdev->flags);
|
|
|
|
drbd_send_uuids(mdev);
|
|
drbd_send_sizes(mdev, 1, ddsf);
|
|
}
|
|
|
|
fail:
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode = NO_ERROR;
|
|
int err;
|
|
int ovr; /* online verify running */
|
|
int rsr; /* re-sync running */
|
|
struct crypto_hash *verify_tfm = NULL;
|
|
struct crypto_hash *csums_tfm = NULL;
|
|
struct syncer_conf sc;
|
|
cpumask_var_t new_cpu_mask;
|
|
int *rs_plan_s = NULL;
|
|
int fifo_size;
|
|
|
|
if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
|
|
if (nlp->flags & DRBD_NL_SET_DEFAULTS) {
|
|
memset(&sc, 0, sizeof(struct syncer_conf));
|
|
sc.rate = DRBD_RATE_DEF;
|
|
sc.after = DRBD_AFTER_DEF;
|
|
sc.al_extents = DRBD_AL_EXTENTS_DEF;
|
|
sc.on_no_data = DRBD_ON_NO_DATA_DEF;
|
|
sc.c_plan_ahead = DRBD_C_PLAN_AHEAD_DEF;
|
|
sc.c_delay_target = DRBD_C_DELAY_TARGET_DEF;
|
|
sc.c_fill_target = DRBD_C_FILL_TARGET_DEF;
|
|
sc.c_max_rate = DRBD_C_MAX_RATE_DEF;
|
|
sc.c_min_rate = DRBD_C_MIN_RATE_DEF;
|
|
} else
|
|
memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf));
|
|
|
|
if (!syncer_conf_from_tags(mdev, nlp->tag_list, &sc)) {
|
|
retcode = ERR_MANDATORY_TAG;
|
|
goto fail;
|
|
}
|
|
|
|
/* re-sync running */
|
|
rsr = ( mdev->state.conn == C_SYNC_SOURCE ||
|
|
mdev->state.conn == C_SYNC_TARGET ||
|
|
mdev->state.conn == C_PAUSED_SYNC_S ||
|
|
mdev->state.conn == C_PAUSED_SYNC_T );
|
|
|
|
if (rsr && strcmp(sc.csums_alg, mdev->sync_conf.csums_alg)) {
|
|
retcode = ERR_CSUMS_RESYNC_RUNNING;
|
|
goto fail;
|
|
}
|
|
|
|
if (!rsr && sc.csums_alg[0]) {
|
|
csums_tfm = crypto_alloc_hash(sc.csums_alg, 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(csums_tfm)) {
|
|
csums_tfm = NULL;
|
|
retcode = ERR_CSUMS_ALG;
|
|
goto fail;
|
|
}
|
|
|
|
if (!drbd_crypto_is_hash(crypto_hash_tfm(csums_tfm))) {
|
|
retcode = ERR_CSUMS_ALG_ND;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* online verify running */
|
|
ovr = (mdev->state.conn == C_VERIFY_S || mdev->state.conn == C_VERIFY_T);
|
|
|
|
if (ovr) {
|
|
if (strcmp(sc.verify_alg, mdev->sync_conf.verify_alg)) {
|
|
retcode = ERR_VERIFY_RUNNING;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (!ovr && sc.verify_alg[0]) {
|
|
verify_tfm = crypto_alloc_hash(sc.verify_alg, 0, CRYPTO_ALG_ASYNC);
|
|
if (IS_ERR(verify_tfm)) {
|
|
verify_tfm = NULL;
|
|
retcode = ERR_VERIFY_ALG;
|
|
goto fail;
|
|
}
|
|
|
|
if (!drbd_crypto_is_hash(crypto_hash_tfm(verify_tfm))) {
|
|
retcode = ERR_VERIFY_ALG_ND;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* silently ignore cpu mask on UP kernel */
|
|
if (nr_cpu_ids > 1 && sc.cpu_mask[0] != 0) {
|
|
err = bitmap_parse(sc.cpu_mask, 32,
|
|
cpumask_bits(new_cpu_mask), nr_cpu_ids);
|
|
if (err) {
|
|
dev_warn(DEV, "bitmap_parse() failed with %d\n", err);
|
|
retcode = ERR_CPU_MASK_PARSE;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
ERR_IF (sc.rate < 1) sc.rate = 1;
|
|
ERR_IF (sc.al_extents < 7) sc.al_extents = 127; /* arbitrary minimum */
|
|
#define AL_MAX ((MD_AL_MAX_SIZE-1) * AL_EXTENTS_PT)
|
|
if (sc.al_extents > AL_MAX) {
|
|
dev_err(DEV, "sc.al_extents > %d\n", AL_MAX);
|
|
sc.al_extents = AL_MAX;
|
|
}
|
|
#undef AL_MAX
|
|
|
|
/* to avoid spurious errors when configuring minors before configuring
|
|
* the minors they depend on: if necessary, first create the minor we
|
|
* depend on */
|
|
if (sc.after >= 0)
|
|
ensure_mdev(sc.after, 1);
|
|
|
|
/* most sanity checks done, try to assign the new sync-after
|
|
* dependency. need to hold the global lock in there,
|
|
* to avoid a race in the dependency loop check. */
|
|
retcode = drbd_alter_sa(mdev, sc.after);
|
|
if (retcode != NO_ERROR)
|
|
goto fail;
|
|
|
|
fifo_size = (sc.c_plan_ahead * 10 * SLEEP_TIME) / HZ;
|
|
if (fifo_size != mdev->rs_plan_s.size && fifo_size > 0) {
|
|
rs_plan_s = kzalloc(sizeof(int) * fifo_size, GFP_KERNEL);
|
|
if (!rs_plan_s) {
|
|
dev_err(DEV, "kmalloc of fifo_buffer failed");
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
/* ok, assign the rest of it as well.
|
|
* lock against receive_SyncParam() */
|
|
spin_lock(&mdev->peer_seq_lock);
|
|
mdev->sync_conf = sc;
|
|
|
|
if (!rsr) {
|
|
crypto_free_hash(mdev->csums_tfm);
|
|
mdev->csums_tfm = csums_tfm;
|
|
csums_tfm = NULL;
|
|
}
|
|
|
|
if (!ovr) {
|
|
crypto_free_hash(mdev->verify_tfm);
|
|
mdev->verify_tfm = verify_tfm;
|
|
verify_tfm = NULL;
|
|
}
|
|
|
|
if (fifo_size != mdev->rs_plan_s.size) {
|
|
kfree(mdev->rs_plan_s.values);
|
|
mdev->rs_plan_s.values = rs_plan_s;
|
|
mdev->rs_plan_s.size = fifo_size;
|
|
mdev->rs_planed = 0;
|
|
rs_plan_s = NULL;
|
|
}
|
|
|
|
spin_unlock(&mdev->peer_seq_lock);
|
|
|
|
if (get_ldev(mdev)) {
|
|
wait_event(mdev->al_wait, lc_try_lock(mdev->act_log));
|
|
drbd_al_shrink(mdev);
|
|
err = drbd_check_al_size(mdev);
|
|
lc_unlock(mdev->act_log);
|
|
wake_up(&mdev->al_wait);
|
|
|
|
put_ldev(mdev);
|
|
drbd_md_sync(mdev);
|
|
|
|
if (err) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
if (mdev->state.conn >= C_CONNECTED)
|
|
drbd_send_sync_param(mdev, &sc);
|
|
|
|
if (!cpumask_equal(mdev->cpu_mask, new_cpu_mask)) {
|
|
cpumask_copy(mdev->cpu_mask, new_cpu_mask);
|
|
drbd_calc_cpu_mask(mdev);
|
|
mdev->receiver.reset_cpu_mask = 1;
|
|
mdev->asender.reset_cpu_mask = 1;
|
|
mdev->worker.reset_cpu_mask = 1;
|
|
}
|
|
|
|
kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE);
|
|
fail:
|
|
kfree(rs_plan_s);
|
|
free_cpumask_var(new_cpu_mask);
|
|
crypto_free_hash(csums_tfm);
|
|
crypto_free_hash(verify_tfm);
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode;
|
|
|
|
/* If there is still bitmap IO pending, probably because of a previous
|
|
* resync just being finished, wait for it before requesting a new resync. */
|
|
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
|
|
|
|
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T), CS_ORDERED);
|
|
|
|
if (retcode < SS_SUCCESS && retcode != SS_NEED_CONNECTION)
|
|
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
|
|
|
|
while (retcode == SS_NEED_CONNECTION) {
|
|
spin_lock_irq(&mdev->req_lock);
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
retcode = _drbd_set_state(_NS(mdev, disk, D_INCONSISTENT), CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
|
|
if (retcode != SS_NEED_CONNECTION)
|
|
break;
|
|
|
|
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T));
|
|
}
|
|
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_bmio_set_susp_al(struct drbd_conf *mdev)
|
|
{
|
|
int rv;
|
|
|
|
rv = drbd_bmio_set_n_write(mdev);
|
|
drbd_suspend_al(mdev);
|
|
return rv;
|
|
}
|
|
|
|
static int drbd_nl_invalidate_peer(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode;
|
|
|
|
/* If there is still bitmap IO pending, probably because of a previous
|
|
* resync just being finished, wait for it before requesting a new resync. */
|
|
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
|
|
|
|
retcode = _drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S), CS_ORDERED);
|
|
|
|
if (retcode < SS_SUCCESS) {
|
|
if (retcode == SS_NEED_CONNECTION && mdev->state.role == R_PRIMARY) {
|
|
/* The peer will get a resync upon connect anyways. Just make that
|
|
into a full resync. */
|
|
retcode = drbd_request_state(mdev, NS(pdsk, D_INCONSISTENT));
|
|
if (retcode >= SS_SUCCESS) {
|
|
if (drbd_bitmap_io(mdev, &drbd_bmio_set_susp_al,
|
|
"set_n_write from invalidate_peer",
|
|
BM_LOCKED_SET_ALLOWED))
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
} else
|
|
retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_S));
|
|
}
|
|
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_pause_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode = NO_ERROR;
|
|
|
|
if (drbd_request_state(mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO)
|
|
retcode = ERR_PAUSE_IS_SET;
|
|
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_resume_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode = NO_ERROR;
|
|
union drbd_state s;
|
|
|
|
if (drbd_request_state(mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) {
|
|
s = mdev->state;
|
|
if (s.conn == C_PAUSED_SYNC_S || s.conn == C_PAUSED_SYNC_T) {
|
|
retcode = s.aftr_isp ? ERR_PIC_AFTER_DEP :
|
|
s.peer_isp ? ERR_PIC_PEER_DEP : ERR_PAUSE_IS_CLEAR;
|
|
} else {
|
|
retcode = ERR_PAUSE_IS_CLEAR;
|
|
}
|
|
}
|
|
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_suspend_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
reply->ret_code = drbd_request_state(mdev, NS(susp, 1));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_resume_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
if (test_bit(NEW_CUR_UUID, &mdev->flags)) {
|
|
drbd_uuid_new_current(mdev);
|
|
clear_bit(NEW_CUR_UUID, &mdev->flags);
|
|
}
|
|
drbd_suspend_io(mdev);
|
|
reply->ret_code = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0));
|
|
if (reply->ret_code == SS_SUCCESS) {
|
|
if (mdev->state.conn < C_CONNECTED)
|
|
tl_clear(mdev);
|
|
if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED)
|
|
tl_restart(mdev, fail_frozen_disk_io);
|
|
}
|
|
drbd_resume_io(mdev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_outdate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
reply->ret_code = drbd_request_state(mdev, NS(disk, D_OUTDATED));
|
|
return 0;
|
|
}
|
|
|
|
static int drbd_nl_get_config(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
unsigned short *tl;
|
|
|
|
tl = reply->tag_list;
|
|
|
|
if (get_ldev(mdev)) {
|
|
tl = disk_conf_to_tags(mdev, &mdev->ldev->dc, tl);
|
|
put_ldev(mdev);
|
|
}
|
|
|
|
if (get_net_conf(mdev)) {
|
|
tl = net_conf_to_tags(mdev, mdev->net_conf, tl);
|
|
put_net_conf(mdev);
|
|
}
|
|
tl = syncer_conf_to_tags(mdev, &mdev->sync_conf, tl);
|
|
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
return (int)((char *)tl - (char *)reply->tag_list);
|
|
}
|
|
|
|
static int drbd_nl_get_state(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
unsigned short *tl = reply->tag_list;
|
|
union drbd_state s = mdev->state;
|
|
unsigned long rs_left;
|
|
unsigned int res;
|
|
|
|
tl = get_state_to_tags(mdev, (struct get_state *)&s, tl);
|
|
|
|
/* no local ref, no bitmap, no syncer progress. */
|
|
if (s.conn >= C_SYNC_SOURCE && s.conn <= C_PAUSED_SYNC_T) {
|
|
if (get_ldev(mdev)) {
|
|
drbd_get_syncer_progress(mdev, &rs_left, &res);
|
|
tl = tl_add_int(tl, T_sync_progress, &res);
|
|
put_ldev(mdev);
|
|
}
|
|
}
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
return (int)((char *)tl - (char *)reply->tag_list);
|
|
}
|
|
|
|
static int drbd_nl_get_uuids(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
unsigned short *tl;
|
|
|
|
tl = reply->tag_list;
|
|
|
|
if (get_ldev(mdev)) {
|
|
tl = tl_add_blob(tl, T_uuids, mdev->ldev->md.uuid, UI_SIZE*sizeof(u64));
|
|
tl = tl_add_int(tl, T_uuids_flags, &mdev->ldev->md.flags);
|
|
put_ldev(mdev);
|
|
}
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
return (int)((char *)tl - (char *)reply->tag_list);
|
|
}
|
|
|
|
/**
|
|
* drbd_nl_get_timeout_flag() - Used by drbdsetup to find out which timeout value to use
|
|
* @mdev: DRBD device.
|
|
* @nlp: Netlink/connector packet from drbdsetup
|
|
* @reply: Reply packet for drbdsetup
|
|
*/
|
|
static int drbd_nl_get_timeout_flag(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
unsigned short *tl;
|
|
char rv;
|
|
|
|
tl = reply->tag_list;
|
|
|
|
rv = mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED :
|
|
test_bit(USE_DEGR_WFC_T, &mdev->flags) ? UT_DEGRADED : UT_DEFAULT;
|
|
|
|
tl = tl_add_blob(tl, T_use_degraded, &rv, sizeof(rv));
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
return (int)((char *)tl - (char *)reply->tag_list);
|
|
}
|
|
|
|
static int drbd_nl_start_ov(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
/* default to resume from last known position, if possible */
|
|
struct start_ov args =
|
|
{ .start_sector = mdev->ov_start_sector };
|
|
|
|
if (!start_ov_from_tags(mdev, nlp->tag_list, &args)) {
|
|
reply->ret_code = ERR_MANDATORY_TAG;
|
|
return 0;
|
|
}
|
|
|
|
/* If there is still bitmap IO pending, e.g. previous resync or verify
|
|
* just being finished, wait for it before requesting a new resync. */
|
|
wait_event(mdev->misc_wait, !test_bit(BITMAP_IO, &mdev->flags));
|
|
|
|
/* w_make_ov_request expects position to be aligned */
|
|
mdev->ov_start_sector = args.start_sector & ~BM_SECT_PER_BIT;
|
|
reply->ret_code = drbd_request_state(mdev,NS(conn,C_VERIFY_S));
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int drbd_nl_new_c_uuid(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp,
|
|
struct drbd_nl_cfg_reply *reply)
|
|
{
|
|
int retcode = NO_ERROR;
|
|
int skip_initial_sync = 0;
|
|
int err;
|
|
|
|
struct new_c_uuid args;
|
|
|
|
memset(&args, 0, sizeof(struct new_c_uuid));
|
|
if (!new_c_uuid_from_tags(mdev, nlp->tag_list, &args)) {
|
|
reply->ret_code = ERR_MANDATORY_TAG;
|
|
return 0;
|
|
}
|
|
|
|
mutex_lock(&mdev->state_mutex); /* Protects us against serialized state changes. */
|
|
|
|
if (!get_ldev(mdev)) {
|
|
retcode = ERR_NO_DISK;
|
|
goto out;
|
|
}
|
|
|
|
/* this is "skip initial sync", assume to be clean */
|
|
if (mdev->state.conn == C_CONNECTED && mdev->agreed_pro_version >= 90 &&
|
|
mdev->ldev->md.uuid[UI_CURRENT] == UUID_JUST_CREATED && args.clear_bm) {
|
|
dev_info(DEV, "Preparing to skip initial sync\n");
|
|
skip_initial_sync = 1;
|
|
} else if (mdev->state.conn != C_STANDALONE) {
|
|
retcode = ERR_CONNECTED;
|
|
goto out_dec;
|
|
}
|
|
|
|
drbd_uuid_set(mdev, UI_BITMAP, 0); /* Rotate UI_BITMAP to History 1, etc... */
|
|
drbd_uuid_new_current(mdev); /* New current, previous to UI_BITMAP */
|
|
|
|
if (args.clear_bm) {
|
|
err = drbd_bitmap_io(mdev, &drbd_bmio_clear_n_write,
|
|
"clear_n_write from new_c_uuid", BM_LOCKED_MASK);
|
|
if (err) {
|
|
dev_err(DEV, "Writing bitmap failed with %d\n",err);
|
|
retcode = ERR_IO_MD_DISK;
|
|
}
|
|
if (skip_initial_sync) {
|
|
drbd_send_uuids_skip_initial_sync(mdev);
|
|
_drbd_uuid_set(mdev, UI_BITMAP, 0);
|
|
drbd_print_uuids(mdev, "cleared bitmap UUID");
|
|
spin_lock_irq(&mdev->req_lock);
|
|
_drbd_set_state(_NS2(mdev, disk, D_UP_TO_DATE, pdsk, D_UP_TO_DATE),
|
|
CS_VERBOSE, NULL);
|
|
spin_unlock_irq(&mdev->req_lock);
|
|
}
|
|
}
|
|
|
|
drbd_md_sync(mdev);
|
|
out_dec:
|
|
put_ldev(mdev);
|
|
out:
|
|
mutex_unlock(&mdev->state_mutex);
|
|
|
|
reply->ret_code = retcode;
|
|
return 0;
|
|
}
|
|
|
|
struct cn_handler_struct {
|
|
int (*function)(struct drbd_conf *,
|
|
struct drbd_nl_cfg_req *,
|
|
struct drbd_nl_cfg_reply *);
|
|
int reply_body_size;
|
|
};
|
|
|
|
static struct cn_handler_struct cnd_table[] = {
|
|
[ P_primary ] = { &drbd_nl_primary, 0 },
|
|
[ P_secondary ] = { &drbd_nl_secondary, 0 },
|
|
[ P_disk_conf ] = { &drbd_nl_disk_conf, 0 },
|
|
[ P_detach ] = { &drbd_nl_detach, 0 },
|
|
[ P_net_conf ] = { &drbd_nl_net_conf, 0 },
|
|
[ P_disconnect ] = { &drbd_nl_disconnect, 0 },
|
|
[ P_resize ] = { &drbd_nl_resize, 0 },
|
|
[ P_syncer_conf ] = { &drbd_nl_syncer_conf, 0 },
|
|
[ P_invalidate ] = { &drbd_nl_invalidate, 0 },
|
|
[ P_invalidate_peer ] = { &drbd_nl_invalidate_peer, 0 },
|
|
[ P_pause_sync ] = { &drbd_nl_pause_sync, 0 },
|
|
[ P_resume_sync ] = { &drbd_nl_resume_sync, 0 },
|
|
[ P_suspend_io ] = { &drbd_nl_suspend_io, 0 },
|
|
[ P_resume_io ] = { &drbd_nl_resume_io, 0 },
|
|
[ P_outdate ] = { &drbd_nl_outdate, 0 },
|
|
[ P_get_config ] = { &drbd_nl_get_config,
|
|
sizeof(struct syncer_conf_tag_len_struct) +
|
|
sizeof(struct disk_conf_tag_len_struct) +
|
|
sizeof(struct net_conf_tag_len_struct) },
|
|
[ P_get_state ] = { &drbd_nl_get_state,
|
|
sizeof(struct get_state_tag_len_struct) +
|
|
sizeof(struct sync_progress_tag_len_struct) },
|
|
[ P_get_uuids ] = { &drbd_nl_get_uuids,
|
|
sizeof(struct get_uuids_tag_len_struct) },
|
|
[ P_get_timeout_flag ] = { &drbd_nl_get_timeout_flag,
|
|
sizeof(struct get_timeout_flag_tag_len_struct)},
|
|
[ P_start_ov ] = { &drbd_nl_start_ov, 0 },
|
|
[ P_new_c_uuid ] = { &drbd_nl_new_c_uuid, 0 },
|
|
};
|
|
|
|
static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms *nsp)
|
|
{
|
|
struct drbd_nl_cfg_req *nlp = (struct drbd_nl_cfg_req *)req->data;
|
|
struct cn_handler_struct *cm;
|
|
struct cn_msg *cn_reply;
|
|
struct drbd_nl_cfg_reply *reply;
|
|
struct drbd_conf *mdev;
|
|
int retcode, rr;
|
|
int reply_size = sizeof(struct cn_msg)
|
|
+ sizeof(struct drbd_nl_cfg_reply)
|
|
+ sizeof(short int);
|
|
|
|
if (!try_module_get(THIS_MODULE)) {
|
|
printk(KERN_ERR "drbd: try_module_get() failed!\n");
|
|
return;
|
|
}
|
|
|
|
if (!cap_raised(current_cap(), CAP_SYS_ADMIN)) {
|
|
retcode = ERR_PERM;
|
|
goto fail;
|
|
}
|
|
|
|
mdev = ensure_mdev(nlp->drbd_minor,
|
|
(nlp->flags & DRBD_NL_CREATE_DEVICE));
|
|
if (!mdev) {
|
|
retcode = ERR_MINOR_INVALID;
|
|
goto fail;
|
|
}
|
|
|
|
if (nlp->packet_type >= P_nl_after_last_packet ||
|
|
nlp->packet_type == P_return_code_only) {
|
|
retcode = ERR_PACKET_NR;
|
|
goto fail;
|
|
}
|
|
|
|
cm = cnd_table + nlp->packet_type;
|
|
|
|
/* This may happen if packet number is 0: */
|
|
if (cm->function == NULL) {
|
|
retcode = ERR_PACKET_NR;
|
|
goto fail;
|
|
}
|
|
|
|
reply_size += cm->reply_body_size;
|
|
|
|
/* allocation not in the IO path, cqueue thread context */
|
|
cn_reply = kzalloc(reply_size, GFP_KERNEL);
|
|
if (!cn_reply) {
|
|
retcode = ERR_NOMEM;
|
|
goto fail;
|
|
}
|
|
reply = (struct drbd_nl_cfg_reply *) cn_reply->data;
|
|
|
|
reply->packet_type =
|
|
cm->reply_body_size ? nlp->packet_type : P_return_code_only;
|
|
reply->minor = nlp->drbd_minor;
|
|
reply->ret_code = NO_ERROR; /* Might by modified by cm->function. */
|
|
/* reply->tag_list; might be modified by cm->function. */
|
|
|
|
rr = cm->function(mdev, nlp, reply);
|
|
|
|
cn_reply->id = req->id;
|
|
cn_reply->seq = req->seq;
|
|
cn_reply->ack = req->ack + 1;
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply) + rr;
|
|
cn_reply->flags = 0;
|
|
|
|
rr = cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_KERNEL);
|
|
if (rr && rr != -ESRCH)
|
|
printk(KERN_INFO "drbd: cn_netlink_send()=%d\n", rr);
|
|
|
|
kfree(cn_reply);
|
|
module_put(THIS_MODULE);
|
|
return;
|
|
fail:
|
|
drbd_nl_send_reply(req, retcode);
|
|
module_put(THIS_MODULE);
|
|
}
|
|
|
|
static atomic_t drbd_nl_seq = ATOMIC_INIT(2); /* two. */
|
|
|
|
static unsigned short *
|
|
__tl_add_blob(unsigned short *tl, enum drbd_tags tag, const void *data,
|
|
unsigned short len, int nul_terminated)
|
|
{
|
|
unsigned short l = tag_descriptions[tag_number(tag)].max_len;
|
|
len = (len < l) ? len : l;
|
|
put_unaligned(tag, tl++);
|
|
put_unaligned(len, tl++);
|
|
memcpy(tl, data, len);
|
|
tl = (unsigned short*)((char*)tl + len);
|
|
if (nul_terminated)
|
|
*((char*)tl - 1) = 0;
|
|
return tl;
|
|
}
|
|
|
|
static unsigned short *
|
|
tl_add_blob(unsigned short *tl, enum drbd_tags tag, const void *data, int len)
|
|
{
|
|
return __tl_add_blob(tl, tag, data, len, 0);
|
|
}
|
|
|
|
static unsigned short *
|
|
tl_add_str(unsigned short *tl, enum drbd_tags tag, const char *str)
|
|
{
|
|
return __tl_add_blob(tl, tag, str, strlen(str)+1, 0);
|
|
}
|
|
|
|
static unsigned short *
|
|
tl_add_int(unsigned short *tl, enum drbd_tags tag, const void *val)
|
|
{
|
|
put_unaligned(tag, tl++);
|
|
switch(tag_type(tag)) {
|
|
case TT_INTEGER:
|
|
put_unaligned(sizeof(int), tl++);
|
|
put_unaligned(*(int *)val, (int *)tl);
|
|
tl = (unsigned short*)((char*)tl+sizeof(int));
|
|
break;
|
|
case TT_INT64:
|
|
put_unaligned(sizeof(u64), tl++);
|
|
put_unaligned(*(u64 *)val, (u64 *)tl);
|
|
tl = (unsigned short*)((char*)tl+sizeof(u64));
|
|
break;
|
|
default:
|
|
/* someone did something stupid. */
|
|
;
|
|
}
|
|
return tl;
|
|
}
|
|
|
|
void drbd_bcast_state(struct drbd_conf *mdev, union drbd_state state)
|
|
{
|
|
char buffer[sizeof(struct cn_msg)+
|
|
sizeof(struct drbd_nl_cfg_reply)+
|
|
sizeof(struct get_state_tag_len_struct)+
|
|
sizeof(short int)];
|
|
struct cn_msg *cn_reply = (struct cn_msg *) buffer;
|
|
struct drbd_nl_cfg_reply *reply =
|
|
(struct drbd_nl_cfg_reply *)cn_reply->data;
|
|
unsigned short *tl = reply->tag_list;
|
|
|
|
/* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
|
|
|
|
tl = get_state_to_tags(mdev, (struct get_state *)&state, tl);
|
|
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
cn_reply->id.idx = CN_IDX_DRBD;
|
|
cn_reply->id.val = CN_VAL_DRBD;
|
|
|
|
cn_reply->seq = atomic_add_return(1, &drbd_nl_seq);
|
|
cn_reply->ack = 0; /* not used here. */
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply) +
|
|
(int)((char *)tl - (char *)reply->tag_list);
|
|
cn_reply->flags = 0;
|
|
|
|
reply->packet_type = P_get_state;
|
|
reply->minor = mdev_to_minor(mdev);
|
|
reply->ret_code = NO_ERROR;
|
|
|
|
cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO);
|
|
}
|
|
|
|
void drbd_bcast_ev_helper(struct drbd_conf *mdev, char *helper_name)
|
|
{
|
|
char buffer[sizeof(struct cn_msg)+
|
|
sizeof(struct drbd_nl_cfg_reply)+
|
|
sizeof(struct call_helper_tag_len_struct)+
|
|
sizeof(short int)];
|
|
struct cn_msg *cn_reply = (struct cn_msg *) buffer;
|
|
struct drbd_nl_cfg_reply *reply =
|
|
(struct drbd_nl_cfg_reply *)cn_reply->data;
|
|
unsigned short *tl = reply->tag_list;
|
|
|
|
/* dev_warn(DEV, "drbd_bcast_state() got called\n"); */
|
|
|
|
tl = tl_add_str(tl, T_helper, helper_name);
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
cn_reply->id.idx = CN_IDX_DRBD;
|
|
cn_reply->id.val = CN_VAL_DRBD;
|
|
|
|
cn_reply->seq = atomic_add_return(1, &drbd_nl_seq);
|
|
cn_reply->ack = 0; /* not used here. */
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply) +
|
|
(int)((char *)tl - (char *)reply->tag_list);
|
|
cn_reply->flags = 0;
|
|
|
|
reply->packet_type = P_call_helper;
|
|
reply->minor = mdev_to_minor(mdev);
|
|
reply->ret_code = NO_ERROR;
|
|
|
|
cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO);
|
|
}
|
|
|
|
void drbd_bcast_ee(struct drbd_conf *mdev,
|
|
const char *reason, const int dgs,
|
|
const char* seen_hash, const char* calc_hash,
|
|
const struct drbd_epoch_entry* e)
|
|
{
|
|
struct cn_msg *cn_reply;
|
|
struct drbd_nl_cfg_reply *reply;
|
|
unsigned short *tl;
|
|
struct page *page;
|
|
unsigned len;
|
|
|
|
if (!e)
|
|
return;
|
|
if (!reason || !reason[0])
|
|
return;
|
|
|
|
/* apparently we have to memcpy twice, first to prepare the data for the
|
|
* struct cn_msg, then within cn_netlink_send from the cn_msg to the
|
|
* netlink skb. */
|
|
/* receiver thread context, which is not in the writeout path (of this node),
|
|
* but may be in the writeout path of the _other_ node.
|
|
* GFP_NOIO to avoid potential "distributed deadlock". */
|
|
cn_reply = kzalloc(
|
|
sizeof(struct cn_msg)+
|
|
sizeof(struct drbd_nl_cfg_reply)+
|
|
sizeof(struct dump_ee_tag_len_struct)+
|
|
sizeof(short int),
|
|
GFP_NOIO);
|
|
|
|
if (!cn_reply) {
|
|
dev_err(DEV, "could not kmalloc buffer for drbd_bcast_ee, sector %llu, size %u\n",
|
|
(unsigned long long)e->sector, e->size);
|
|
return;
|
|
}
|
|
|
|
reply = (struct drbd_nl_cfg_reply*)cn_reply->data;
|
|
tl = reply->tag_list;
|
|
|
|
tl = tl_add_str(tl, T_dump_ee_reason, reason);
|
|
tl = tl_add_blob(tl, T_seen_digest, seen_hash, dgs);
|
|
tl = tl_add_blob(tl, T_calc_digest, calc_hash, dgs);
|
|
tl = tl_add_int(tl, T_ee_sector, &e->sector);
|
|
tl = tl_add_int(tl, T_ee_block_id, &e->block_id);
|
|
|
|
/* dump the first 32k */
|
|
len = min_t(unsigned, e->size, 32 << 10);
|
|
put_unaligned(T_ee_data, tl++);
|
|
put_unaligned(len, tl++);
|
|
|
|
page = e->pages;
|
|
page_chain_for_each(page) {
|
|
void *d = kmap_atomic(page, KM_USER0);
|
|
unsigned l = min_t(unsigned, len, PAGE_SIZE);
|
|
memcpy(tl, d, l);
|
|
kunmap_atomic(d, KM_USER0);
|
|
tl = (unsigned short*)((char*)tl + l);
|
|
len -= l;
|
|
if (len == 0)
|
|
break;
|
|
}
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
cn_reply->id.idx = CN_IDX_DRBD;
|
|
cn_reply->id.val = CN_VAL_DRBD;
|
|
|
|
cn_reply->seq = atomic_add_return(1,&drbd_nl_seq);
|
|
cn_reply->ack = 0; // not used here.
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply) +
|
|
(int)((char*)tl - (char*)reply->tag_list);
|
|
cn_reply->flags = 0;
|
|
|
|
reply->packet_type = P_dump_ee;
|
|
reply->minor = mdev_to_minor(mdev);
|
|
reply->ret_code = NO_ERROR;
|
|
|
|
cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO);
|
|
kfree(cn_reply);
|
|
}
|
|
|
|
void drbd_bcast_sync_progress(struct drbd_conf *mdev)
|
|
{
|
|
char buffer[sizeof(struct cn_msg)+
|
|
sizeof(struct drbd_nl_cfg_reply)+
|
|
sizeof(struct sync_progress_tag_len_struct)+
|
|
sizeof(short int)];
|
|
struct cn_msg *cn_reply = (struct cn_msg *) buffer;
|
|
struct drbd_nl_cfg_reply *reply =
|
|
(struct drbd_nl_cfg_reply *)cn_reply->data;
|
|
unsigned short *tl = reply->tag_list;
|
|
unsigned long rs_left;
|
|
unsigned int res;
|
|
|
|
/* no local ref, no bitmap, no syncer progress, no broadcast. */
|
|
if (!get_ldev(mdev))
|
|
return;
|
|
drbd_get_syncer_progress(mdev, &rs_left, &res);
|
|
put_ldev(mdev);
|
|
|
|
tl = tl_add_int(tl, T_sync_progress, &res);
|
|
put_unaligned(TT_END, tl++); /* Close the tag list */
|
|
|
|
cn_reply->id.idx = CN_IDX_DRBD;
|
|
cn_reply->id.val = CN_VAL_DRBD;
|
|
|
|
cn_reply->seq = atomic_add_return(1, &drbd_nl_seq);
|
|
cn_reply->ack = 0; /* not used here. */
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply) +
|
|
(int)((char *)tl - (char *)reply->tag_list);
|
|
cn_reply->flags = 0;
|
|
|
|
reply->packet_type = P_sync_progress;
|
|
reply->minor = mdev_to_minor(mdev);
|
|
reply->ret_code = NO_ERROR;
|
|
|
|
cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO);
|
|
}
|
|
|
|
int __init drbd_nl_init(void)
|
|
{
|
|
static struct cb_id cn_id_drbd;
|
|
int err, try=10;
|
|
|
|
cn_id_drbd.val = CN_VAL_DRBD;
|
|
do {
|
|
cn_id_drbd.idx = cn_idx;
|
|
err = cn_add_callback(&cn_id_drbd, "cn_drbd", &drbd_connector_callback);
|
|
if (!err)
|
|
break;
|
|
cn_idx = (cn_idx + CN_IDX_STEP);
|
|
} while (try--);
|
|
|
|
if (err) {
|
|
printk(KERN_ERR "drbd: cn_drbd failed to register\n");
|
|
return err;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void drbd_nl_cleanup(void)
|
|
{
|
|
static struct cb_id cn_id_drbd;
|
|
|
|
cn_id_drbd.idx = cn_idx;
|
|
cn_id_drbd.val = CN_VAL_DRBD;
|
|
|
|
cn_del_callback(&cn_id_drbd);
|
|
}
|
|
|
|
void drbd_nl_send_reply(struct cn_msg *req, int ret_code)
|
|
{
|
|
char buffer[sizeof(struct cn_msg)+sizeof(struct drbd_nl_cfg_reply)];
|
|
struct cn_msg *cn_reply = (struct cn_msg *) buffer;
|
|
struct drbd_nl_cfg_reply *reply =
|
|
(struct drbd_nl_cfg_reply *)cn_reply->data;
|
|
int rr;
|
|
|
|
memset(buffer, 0, sizeof(buffer));
|
|
cn_reply->id = req->id;
|
|
|
|
cn_reply->seq = req->seq;
|
|
cn_reply->ack = req->ack + 1;
|
|
cn_reply->len = sizeof(struct drbd_nl_cfg_reply);
|
|
cn_reply->flags = 0;
|
|
|
|
reply->packet_type = P_return_code_only;
|
|
reply->minor = ((struct drbd_nl_cfg_req *)req->data)->drbd_minor;
|
|
reply->ret_code = ret_code;
|
|
|
|
rr = cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO);
|
|
if (rr && rr != -ESRCH)
|
|
printk(KERN_INFO "drbd: cn_netlink_send()=%d\n", rr);
|
|
}
|
|
|