diff options
| -rw-r--r-- | drivers/block/drbd/drbd_actlog.c | 3 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_int.h | 36 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_main.c | 27 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_nl.c | 1536 | ||||
| -rw-r--r-- | drivers/block/drbd/drbd_state.c | 7 | ||||
| -rw-r--r-- | include/linux/drbd.h | 35 | ||||
| -rw-r--r-- | include/linux/genl_magic_func.h | 2 |
7 files changed, 806 insertions, 840 deletions
diff --git a/drivers/block/drbd/drbd_actlog.c b/drivers/block/drbd/drbd_actlog.c index 7cd78617669..c1a90616776 100644 --- a/drivers/block/drbd/drbd_actlog.c +++ b/drivers/block/drbd/drbd_actlog.c @@ -702,6 +702,7 @@ static int w_update_odbm(struct drbd_work *w, int unused) { struct update_odbm_work *udw = container_of(w, struct update_odbm_work, w); struct drbd_conf *mdev = w->mdev; + struct sib_info sib = { .sib_reason = SIB_SYNC_PROGRESS, }; if (!get_ldev(mdev)) { if (__ratelimit(&drbd_ratelimit_state)) @@ -725,7 +726,7 @@ static int w_update_odbm(struct drbd_work *w, int unused) break; } } - drbd_bcast_sync_progress(mdev); + drbd_bcast_event(mdev, &sib); return 1; } diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h index e6875834464..429fd8da6b7 100644 --- a/drivers/block/drbd/drbd_int.h +++ b/drivers/block/drbd/drbd_int.h @@ -44,6 +44,7 @@ #include <net/tcp.h> #include <linux/lru_cache.h> #include <linux/prefetch.h> +#include <linux/drbd_genl_api.h> #include <linux/drbd.h> #include "drbd_state.h" @@ -65,7 +66,6 @@ extern unsigned int minor_count; extern int disable_sendpage; extern int allow_oos; -extern unsigned int cn_idx; #ifdef CONFIG_DRBD_FAULT_INJECTION extern int enable_faults; @@ -865,14 +865,6 @@ struct drbd_md { */ }; -/* for sync_conf and other types... */ -#define NL_PACKET(name, number, fields) struct name { fields }; -#define NL_INTEGER(pn,pr,member) int member; -#define NL_INT64(pn,pr,member) __u64 member; -#define NL_BIT(pn,pr,member) unsigned member:1; -#define NL_STRING(pn,pr,member,len) unsigned char member[len]; int member ## _len; -#include "linux/drbd_nl.h" - struct drbd_backing_dev { struct block_device *backing_bdev; struct block_device *md_bdev; @@ -1502,7 +1494,7 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor, extern void drbd_free_mdev(struct drbd_conf *mdev); extern void drbd_delete_device(unsigned int minor); -struct drbd_tconn *drbd_new_tconn(char *name); +struct drbd_tconn *drbd_new_tconn(const char *name); extern void drbd_free_tconn(struct drbd_tconn *tconn); struct drbd_tconn *conn_by_name(const char *name); @@ -1679,16 +1671,22 @@ extern int __drbd_set_out_of_sync(struct drbd_conf *mdev, sector_t sector, extern void drbd_al_apply_to_bm(struct drbd_conf *mdev); extern void drbd_al_shrink(struct drbd_conf *mdev); - /* drbd_nl.c */ - -void drbd_nl_cleanup(void); -int __init drbd_nl_init(void); -void drbd_bcast_state(struct drbd_conf *mdev, union drbd_state); -void drbd_bcast_sync_progress(struct drbd_conf *mdev); -void drbd_bcast_ee(struct drbd_conf *, const char *, const int, const char *, - const char *, const struct drbd_peer_request *); - +/* state info broadcast */ +struct sib_info { + enum drbd_state_info_bcast_reason sib_reason; + union { + struct { + char *helper_name; + unsigned helper_exit_code; + }; + struct { + union drbd_state os; + union drbd_state ns; + }; + }; +}; +void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib); /* * inline helper functions diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c index 9f6db5947c6..9697ab87209 100644 --- a/drivers/block/drbd/drbd_main.c +++ b/drivers/block/drbd/drbd_main.c @@ -86,7 +86,6 @@ MODULE_PARM_DESC(allow_oos, "DONT USE!"); module_param(minor_count, uint, 0444); module_param(disable_sendpage, bool, 0644); module_param(allow_oos, bool, 0); -module_param(cn_idx, uint, 0444); module_param(proc_details, int, 0644); #ifdef CONFIG_DRBD_FAULT_INJECTION @@ -108,7 +107,6 @@ module_param(fault_devs, int, 0644); unsigned int minor_count = DRBD_MINOR_COUNT_DEF; int disable_sendpage; int allow_oos; -unsigned int cn_idx = CN_IDX_DRBD; int proc_details; /* Detail level in proc drbd*/ /* Module parameter for setting the user mode helper program @@ -2175,7 +2173,7 @@ static void drbd_cleanup(void) if (drbd_proc) remove_proc_entry("drbd", NULL); - drbd_nl_cleanup(); + drbd_genl_unregister(); idr_for_each_entry(&minors, mdev, i) drbd_delete_device(i); @@ -2237,6 +2235,9 @@ struct drbd_tconn *conn_by_name(const char *name) { struct drbd_tconn *tconn; + if (!name || !name[0]) + return NULL; + write_lock_irq(&global_state_lock); list_for_each_entry(tconn, &drbd_tconns, all_tconn) { if (!strcmp(tconn->name, name)) @@ -2248,7 +2249,7 @@ found: return tconn; } -struct drbd_tconn *drbd_new_tconn(char *name) +struct drbd_tconn *drbd_new_tconn(const char *name) { struct drbd_tconn *tconn; @@ -2333,6 +2334,7 @@ enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor, mdev->tconn = tconn; mdev->minor = minor; + mdev->vnr = vnr; drbd_init_set_defaults(mdev); @@ -2461,10 +2463,6 @@ int __init drbd_init(void) #endif } - err = drbd_nl_init(); - if (err) - return err; - err = register_blkdev(DRBD_MAJOR, "drbd"); if (err) { printk(KERN_ERR @@ -2473,6 +2471,13 @@ int __init drbd_init(void) return err; } + err = drbd_genl_register(); + if (err) { + printk(KERN_ERR "drbd: unable to register generic netlink family\n"); + goto fail; + } + + register_reboot_notifier(&drbd_notifier); /* @@ -2487,12 +2492,12 @@ int __init drbd_init(void) err = drbd_create_mempools(); if (err) - goto Enomem; + goto fail; drbd_proc = proc_create_data("drbd", S_IFREG | S_IRUGO , NULL, &drbd_proc_fops, NULL); if (!drbd_proc) { printk(KERN_ERR "drbd: unable to register proc file\n"); - goto Enomem; + goto fail; } rwlock_init(&global_state_lock); @@ -2507,7 +2512,7 @@ int __init drbd_init(void) return 0; /* Success! */ -Enomem: +fail: drbd_cleanup(); if (err == -ENOMEM) /* currently always the case */ diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c index f2739fd188a..f9be14248e3 100644 --- a/drivers/block/drbd/drbd_nl.c +++ b/drivers/block/drbd/drbd_nl.c @@ -29,110 +29,225 @@ #include <linux/fs.h> #include <linux/file.h> #include <linux/slab.h> -#include <linux/connector.h> #include <linux/blkpg.h> #include <linux/cpumask.h> #include "drbd_int.h" #include "drbd_req.h" #include "drbd_wrappers.h" #include <asm/unaligned.h> -#include <linux/drbd_tag_magic.h> #include <linux/drbd_limits.h> -#include <linux/compiler.h> #include <linux/kthread.h> -static unsigned short *tl_add_blob(unsigned short *, enum drbd_tags, const void *, int); -static unsigned short *tl_add_str(unsigned short *, enum drbd_tags, const char *); -static unsigned short *tl_add_int(unsigned short *, enum drbd_tags, const void *); - -/* see get_sb_bdev and bd_claim */ +#include <net/genetlink.h> + +/* .doit */ +// int drbd_adm_create_resource(struct sk_buff *skb, struct genl_info *info); +// int drbd_adm_delete_resource(struct sk_buff *skb, struct genl_info *info); + +int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info); + +int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info); + +int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info); +int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info); +/* .dumpit */ +int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb); + +#include <linux/drbd_genl_api.h> +#include <linux/genl_magic_func.h> + +/* used blkdev_get_by_path, to claim our meta data device(s) */ static char *drbd_m_holder = "Hands off! this is DRBD's meta data device."; -/* Generate the tag_list to struct functions */ -#define NL_PACKET(name, number, fields) \ -static int name ## _from_tags( \ - unsigned short *tags, struct name *arg) __attribute__ ((unused)); \ -static int name ## _from_tags( \ - unsigned short *tags, struct name *arg) \ -{ \ - int tag; \ - int dlen; \ - \ - while ((tag = get_unaligned(tags++)) != TT_END) { \ - dlen = get_unaligned(tags++); \ - switch (tag_number(tag)) { \ - fields \ - default: \ - if (tag & T_MANDATORY) { \ - printk(KERN_ERR "drbd: Unknown tag: %d\n", tag_number(tag)); \ - return 0; \ - } \ - } \ - tags = (unsigned short *)((char *)tags + dlen); \ - } \ - return 1; \ +/* Configuration is strictly serialized, because generic netlink message + * processing is strictly serialized by the genl_lock(). + * Which means we can use one static global drbd_config_context struct. + */ +static struct drbd_config_context { + /* assigned from drbd_genlmsghdr */ + unsigned int minor; + /* assigned from request attributes, if present */ + unsigned int volume; +#define VOLUME_UNSPECIFIED (-1U) + /* pointer into the request skb, + * limited lifetime! */ + char *conn_name; + + /* reply buffer */ + struct sk_buff *reply_skb; + /* pointer into reply buffer */ + struct drbd_genlmsghdr *reply_dh; + /* resolved from attributes, if possible */ + struct drbd_conf *mdev; + struct drbd_tconn *tconn; +} adm_ctx; + +static void drbd_adm_send_reply(struct sk_buff *skb, struct genl_info *info) +{ + genlmsg_end(skb, genlmsg_data(nlmsg_data(nlmsg_hdr(skb)))); + if (genlmsg_reply(skb, info)) + printk(KERN_ERR "drbd: error sending genl reply\n"); } -#define NL_INTEGER(pn, pr, member) \ - case pn: /* D_ASSERT( tag_type(tag) == TT_INTEGER ); */ \ - arg->member = get_unaligned((int *)(tags)); \ - break; -#define NL_INT64(pn, pr, member) \ - case pn: /* D_ASSERT( tag_type(tag) == TT_INT64 ); */ \ - arg->member = get_unaligned((u64 *)(tags)); \ - break; -#define NL_BIT(pn, pr, member) \ - case pn: /* D_ASSERT( tag_type(tag) == TT_BIT ); */ \ - arg->member = *(char *)(tags) ? 1 : 0; \ - break; -#define NL_STRING(pn, pr, member, len) \ - case pn: /* D_ASSERT( tag_type(tag) == TT_STRING ); */ \ - if (dlen > len) { \ - printk(KERN_ERR "drbd: arg too long: %s (%u wanted, max len: %u bytes)\n", \ - #member, dlen, (unsigned int)len); \ - return 0; \ - } \ - arg->member ## _len = dlen; \ - memcpy(arg->member, tags, min_t(size_t, dlen, len)); \ - break; -#include "linux/drbd_nl.h" - -/* Generate the struct to tag_list functions */ -#define NL_PACKET(name, number, fields) \ -static unsigned short* \ -name ## _to_tags( \ - struct name *arg, unsigned short *tags) __attribute__ ((unused)); \ -static unsigned short* \ -name ## _to_tags( \ - struct name *arg, unsigned short *tags) \ -{ \ - fields \ - return tags; \ + +/* Used on a fresh "drbd_adm_prepare"d reply_skb, this cannot fail: The only + * reason it could fail was no space in skb, and there are 4k available. */ +static int drbd_msg_put_info(const char *info) +{ + struct sk_buff *skb = adm_ctx.reply_skb; + struct nlattr *nla; + int err = -EMSGSIZE; + + if (!info || !info[0]) + return 0; + + nla = nla_nest_start(skb, DRBD_NLA_CFG_REPLY); + if (!nla) + return err; + + err = nla_put_string(skb, T_info_text, info); + if (err) { + nla_nest_cancel(skb, nla); + return err; + } else + nla_nest_end(skb, nla); + return 0; } -#define NL_INTEGER(pn, pr, member) \ - put_unaligned(pn | pr | TT_INTEGER, tags++); \ - put_unaligned(sizeof(int), tags++); \ - put_unaligned(arg->member, (int *)tags); \ - tags = (unsigned short *)((char *)tags+sizeof(int)); -#define NL_INT64(pn, pr, member) \ - put_unaligned(pn | pr | TT_INT64, tags++); \ - put_unaligned(sizeof(u64), tags++); \ - put_unaligned(arg->member, (u64 *)tags); \ - tags = (unsigned short *)((char *)tags+sizeof(u64)); -#define NL_BIT(pn, pr, member) \ - put_unaligned(pn | pr | TT_BIT, tags++); \ - put_unaligned(sizeof(char), tags++); \ - *(char *)tags = arg->member; \ - tags = (unsigned short *)((char *)tags+sizeof(char)); -#define NL_STRING(pn, pr, member, len) \ - put_unaligned(pn | pr | TT_STRING, tags++); \ - put_unaligned(arg->member ## _len, tags++); \ - memcpy(tags, arg->member, arg->member ## _len); \ - tags = (unsigned short *)((char *)tags + arg->member ## _len); -#include "linux/drbd_nl.h" - -void drbd_bcast_ev_helper(struct drbd_conf *mdev, char *helper_name); -void drbd_nl_send_reply(struct cn_msg *, int); +/* This would be a good candidate for a "pre_doit" hook, + * and per-family private info->pointers. + * But we need to stay compatible with older kernels. + * If it returns successfully, adm_ctx members are valid. + */ +#define DRBD_ADM_NEED_MINOR 1 +#define DRBD_ADM_NEED_CONN 2 +static int drbd_adm_prepare(struct sk_buff *skb, struct genl_info *info, + unsigned flags) +{ + struct drbd_genlmsghdr *d_in = info->userhdr; + const u8 cmd = info->genlhdr->cmd; + int err; + + memset(&adm_ctx, 0, sizeof(adm_ctx)); + + /* genl_rcv_msg only checks for CAP_NET_ADMIN on "GENL_ADMIN_PERM" :( */ + if (cmd != DRBD_ADM_GET_STATUS + && security_netlink_recv(skb, CAP_SYS_ADMIN)) + return -EPERM; + + adm_ctx.reply_skb = genlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!adm_ctx.reply_skb) + goto fail; + + adm_ctx.reply_dh = genlmsg_put_reply(adm_ctx.reply_skb, + info, &drbd_genl_family, 0, cmd); + /* put of a few bytes into a fresh skb of >= 4k will always succeed. + * but anyways */ + if (!adm_ctx.reply_dh) + goto fail; + + adm_ctx.reply_dh->minor = d_in->minor; + adm_ctx.reply_dh->ret_code = NO_ERROR; + + if (info->attrs[DRBD_NLA_CFG_CONTEXT]) { + struct nlattr *nla; + /* parse and validate only */ + err = drbd_cfg_context_from_attrs(NULL, info->attrs); + if (err) + goto fail; + + /* It was present, and valid, + * copy it over to the reply skb. */ + err = nla_put_nohdr(adm_ctx.reply_skb, + info->attrs[DRBD_NLA_CFG_CONTEXT]->nla_len, + info->attrs[DRBD_NLA_CFG_CONTEXT]); + if (err) + goto fail; + + /* and assign stuff to the global adm_ctx */ + nla = nested_attr_tb[__nla_type(T_ctx_volume)]; + adm_ctx.volume = nla ? nla_get_u32(nla) : VOLUME_UNSPECIFIED; + nla = nested_attr_tb[__nla_type(T_ctx_conn_name)]; + if (nla) + adm_ctx.conn_name = nla_data(nla); + } else + adm_ctx.volume = VOLUME_UNSPECIFIED; + + adm_ctx.minor = d_in->minor; + adm_ctx.mdev = minor_to_mdev(d_in->minor); + adm_ctx.tconn = conn_by_name(adm_ctx.conn_name); + + if (!adm_ctx.mdev && (flags & DRBD_ADM_NEED_MINOR)) { + drbd_msg_put_info("unknown minor"); + return ERR_MINOR_INVALID; + } + if (!adm_ctx.tconn && (flags & DRBD_ADM_NEED_CONN)) { + drbd_msg_put_info("unknown connection"); + return ERR_INVALID_REQUEST; + } + + /* some more paranoia, if the request was over-determined */ + if (adm_ctx.mdev && + adm_ctx.volume != VOLUME_UNSPECIFIED && + adm_ctx.volume != adm_ctx.mdev->vnr) { + pr_warning("request: minor=%u, volume=%u; but that minor is volume %u in %s\n", + adm_ctx.minor, adm_ctx.volume, + adm_ctx.mdev->vnr, adm_ctx.mdev->tconn->name); + drbd_msg_put_info("over-determined configuration context mismatch"); + return ERR_INVALID_REQUEST; + } + if (adm_ctx.mdev && adm_ctx.tconn && + adm_ctx.mdev->tconn != adm_ctx.tconn) { + pr_warning("request: minor=%u, conn=%s; but that minor belongs to connection %s\n", + adm_ctx.minor, adm_ctx.conn_name, adm_ctx.mdev->tconn->name); + drbd_msg_put_info("over-determined configuration context mismatch"); + return ERR_INVALID_REQUEST; + } + return NO_ERROR; + +fail: + nlmsg_free(adm_ctx.reply_skb); + adm_ctx.reply_skb = NULL; + return -ENOMEM; +} + +static int drbd_adm_finish(struct genl_info *info, int retcode) +{ + struct nlattr *nla; + const char *conn_name = NULL; + + if (!adm_ctx.reply_skb) + return -ENOMEM; + + adm_ctx.reply_dh->ret_code = retcode; + + nla = info->attrs[DRBD_NLA_CFG_CONTEXT]; + if (nla) { + nla = nla_find_nested(nla, __nla_type(T_ctx_conn_name)); + if (nla) + conn_name = nla_data(nla); + } + + drbd_adm_send_reply(adm_ctx.reply_skb, info); + return 0; +} int drbd_khelper(struct drbd_conf *mdev, char *cmd) { @@ -142,9 +257,9 @@ int drbd_khelper(struct drbd_conf *mdev, char *cmd) NULL, /* Will be set to address family */ NULL, /* Will be set to address */ NULL }; - char mb[12], af[20], ad[60], *afs; char *argv[] = {usermode_helper, cmd, mb, NULL }; + struct sib_info sib; int ret; snprintf(mb, 12, "minor-%d", mdev_to_minor(mdev)); @@ -177,8 +292,9 @@ int drbd_khelper(struct drbd_conf *mdev, char *cmd) drbd_md_sync(mdev); dev_info(DEV, "helper command: %s %s %s\n", usermode_helper, cmd, mb); - - drbd_bcast_ev_helper(mdev, cmd); + sib.sib_reason = SIB_HELPER_PRE; + sib.helper_name = cmd; + drbd_bcast_event(mdev, &sib); ret = call_usermodehelper(usermode_helper, argv, envp, 1); if (ret) dev_warn(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", @@ -188,6 +304,9 @@ int drbd_khelper(struct drbd_conf *mdev, char *cmd) dev_info(DEV, "helper command: %s %s %s exit code %u (0x%x)\n", usermode_helper, cmd, mb, (ret >> 8) & 0xff, ret); + sib.sib_reason = SIB_HELPER_POST; + sib.helper_exit_code = ret; + drbd_bcast_event(mdev, &sib); if (ret < 0) /* Ignore any ERRNOs we got. */ ret = 0; @@ -362,7 +481,7 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) } if (rv == SS_NOTHING_TO_DO) - goto fail; + goto out; if (rv == SS_PRIMARY_NOP && mask.pdsk == 0) { nps = drbd_try_outdate_peer(mdev); @@ -388,13 +507,13 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) rv = _drbd_request_state(mdev, mask, val, CS_VERBOSE + CS_WAIT_COMPLETE); if (rv < SS_SUCCESS) - goto fail; + goto out; } break; } if (rv < SS_SUCCESS) - goto fail; + goto out; if (forced) dev_warn(DEV, "Forced to consider local data as UpToDate!\n"); @@ -438,33 +557,46 @@ drbd_set_role(struct drbd_conf *mdev, enum drbd_role new_role, int force) drbd_md_sync(mdev); kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); - fail: +out: mutex_unlock(mdev->state_mutex); return rv; } -static int drbd_nl_primary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +static const char *from_attrs_err_to_txt(int err) { - struct primary primary_args; - - memset(&primary_args, 0, sizeof(struct primary)); - if (!primary_from_tags(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; + return err == -ENOMSG ? "required attribute missing" : + err == -EOPNOTSUPP ? "unknown mandatory attribute" : + "invalid attribute value"; } -static int drbd_nl_secondary(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_set_role(struct sk_buff *skb, struct genl_info *info) { - reply->ret_code = drbd_set_role(mdev, R_SECONDARY, 0); + struct set_role_parms parms; + int err; + enum drbd_ret_code retcode; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + memset(&parms, 0, sizeof(parms)); + if (info->attrs[DRBD_NLA_SET_ROLE_PARMS]) { + err = set_role_parms_from_attrs(&parms, info->attrs); + if (err) { + retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); + goto out; + } + } + + if (info->genlhdr->cmd == DRBD_ADM_PRIMARY) + retcode = drbd_set_role(adm_ctx.mdev, R_PRIMARY, parms.assume_uptodate); + else + retcode = drbd_set_role(adm_ctx.mdev, R_SECONDARY, 0); +out: + drbd_adm_finish(info, retcode); return 0; } @@ -541,6 +673,12 @@ char *ppsize(char *buf, unsigned long long size) * R_PRIMARY D_INCONSISTENT, and C_SYNC_TARGET: * peer may not initiate a resize. */ +/* Note these are not to be confused with + * drbd_adm_suspend_io/drbd_adm_resume_io, + * which are (sub) state changes triggered by admin (drbdsetup), + * and can be long lived. + * This changes an mdev->flag, is triggered by drbd internals, + * and should be short-lived. */ void drbd_suspend_io(struct drbd_conf *mdev) { set_bit(SUSPEND_IO, &mdev->flags); @@ -881,11 +1019,10 @@ static void drbd_suspend_al(struct drbd_conf *mdev) 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) +int drbd_adm_attach(struct sk_buff *skb, struct genl_info *info) { + struct drbd_conf *mdev; + int err; enum drbd_ret_code retcode; enum determine_dev_size dd; sector_t max_possible_sectors; @@ -897,6 +1034,13 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp enum drbd_state_rv rv; int cp_discovered = 0; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto fail; + + mdev = adm_ctx.mdev; conn_reconfig_start(mdev->tconn); /* if you want to reconfigure, please tear down first */ @@ -910,7 +1054,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp * 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 */ + /* allocation not in the IO path, drbdsetup context */ nbc = kzalloc(sizeof(struct drbd_backing_dev), GFP_KERNEL); if (!nbc) { retcode = ERR_NOMEM; @@ -922,12 +1066,14 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp nbc->dc.fencing = DRBD_FENCING_DEF; nbc->dc.max_bio_bvecs = DRBD_MAX_BIO_BVECS_DEF; - if (!disk_conf_from_tags(nlp->tag_list, &nbc->dc)) { + err = disk_conf_from_attrs(&nbc->dc, info->attrs); + if (err) { retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); goto fail; } - if (nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { + if ((int)nbc->dc.meta_dev_idx < DRBD_MD_INDEX_FLEX_INT) { retcode = ERR_MD_IDX_INVALID; goto fail; } @@ -961,7 +1107,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp */ bdev = blkdev_get_by_path(nbc->dc.meta_dev, FMODE_READ | FMODE_WRITE | FMODE_EXCL, - (nbc->dc.meta_dev_idx < 0) ? + ((int)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, @@ -997,7 +1143,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp goto fail; } - if (nbc->dc.meta_dev_idx < 0) { + if ((int)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); @@ -1028,7 +1174,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp 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) + if ((int)nbc->dc.meta_dev_idx >= 0) dev_warn(DEV, "==>> using internal or flexible " "meta data may help <<==\n"); } @@ -1242,8 +1388,8 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); put_ldev(mdev); - reply->ret_code = retcode; conn_reconfig_done(mdev->tconn); + drbd_adm_finish(info, retcode); return 0; force_diskless_dec: @@ -1251,6 +1397,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp force_diskless: drbd_force_state(mdev, NS(disk, D_FAILED)); drbd_md_sync(mdev); + conn_reconfig_done(mdev->tconn); fail: if (nbc) { if (nbc->backing_bdev) @@ -1263,8 +1410,7 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp } lc_destroy(resync_lru); - reply->ret_code = retcode; - conn_reconfig_done(mdev->tconn); + drbd_adm_finish(info, retcode); return 0; } @@ -1273,42 +1419,54 @@ static int drbd_nl_disk_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp * 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) +int drbd_adm_detach(struct sk_buff *skb, struct genl_info *info) { + struct drbd_conf *mdev; enum drbd_ret_code retcode; - int ret; + + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + mdev = adm_ctx.mdev; 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); + retcode = drbd_request_state(mdev, NS(disk, D_DISKLESS)); + wait_event(mdev->misc_wait, + mdev->state.disk != D_DISKLESS || + !atomic_read(&mdev->local_cnt)); 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; +out: + drbd_adm_finish(info, retcode); return 0; } -static int drbd_nl_net_conf(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_connect(struct sk_buff *skb, struct genl_info *info) { - int i; - enum drbd_ret_code retcode; + char hmac_name[CRYPTO_MAX_ALG_NAME]; + struct drbd_conf *mdev; 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 drbd_conf *mdev; - char hmac_name[CRYPTO_MAX_ALG_NAME]; void *int_dig_out = NULL; void *int_dig_in = NULL; void *int_dig_vv = NULL; struct drbd_tconn *oconn; + struct drbd_tconn *tconn; struct sockaddr *new_my_addr, *new_peer_addr, *taken_addr; + enum drbd_ret_code retcode; + int i; + int err; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + tconn = adm_ctx.tconn; conn_reconfig_start(tconn); if (tconn->cstate > C_STANDALONE) { @@ -1343,8 +1501,10 @@ static int drbd_nl_net_conf(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nl new_conf->on_congestion = DRBD_ON_CONGESTION_DEF; new_conf->cong_extents = DRBD_CONG_EXTENTS_DEF; - if (!net_conf_from_tags(nlp->tag_list, new_conf)) { + err = net_conf_from_attrs(new_conf, info->attrs); + if (err) { retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); goto fail; } @@ -1495,8 +1655,8 @@ static int drbd_nl_net_conf(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nl mdev->recv_cnt = 0; kobject_uevent(&disk_to_dev(mdev->vdisk)->kobj, KOBJ_CHANGE); } - reply->ret_code = retcode; conn_reconfig_done(tconn); + drbd_adm_finish(info, retcode); return 0; fail: @@ -1508,24 +1668,37 @@ fail: crypto_free_hash(integrity_r_tfm); kfree(new_conf); - reply->ret_code = retcode; conn_reconfig_done(tconn); +out: + drbd_adm_finish(info, retcode); return 0; } -static int drbd_nl_disconnect(struct drbd_tconn *tconn, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_disconnect(struct sk_buff *skb, struct genl_info *info) { - int retcode; - struct disconnect dc; + struct disconnect_parms parms; + struct drbd_tconn *tconn; + enum drbd_ret_code retcode; + int err; - memset(&dc, 0, sizeof(struct disconnect)); - if (!disconnect_from_tags(nlp->tag_list, &dc)) { - retcode = ERR_MANDATORY_TAG; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) goto fail; + + tconn = adm_ctx.tconn; + memset(&parms, 0, sizeof(parms)); + if (info->attrs[DRBD_NLA_DISCONNECT_PARMS]) { + err = disconnect_parms_from_attrs(&parms, info->attrs); + if (err) { + retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); + goto fail; + } } - if (dc.force) { + if (parms.force_disconnect) { spin_lock_irq(&tconn->req_lock); if (tconn->cstate >= C_WF_CONNECTION) _conn_request_state(tconn, NS(conn, C_DISCONNECTING), CS_HARD); @@ -1567,7 +1740,7 @@ static int drbd_nl_disconnect(struct drbd_tconn *tconn, struct drbd_nl_cfg_req * done: retcode = NO_ERROR; fail: - reply->ret_code = retcode; + drbd_adm_finish(info, retcode); return 0; } @@ -1587,20 +1760,32 @@ void resync_after_online_grow(struct drbd_conf *mdev) _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) +int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info) { - struct resize rs; - int retcode = NO_ERROR; + struct resize_parms rs; + struct drbd_conf *mdev; + enum drbd_ret_code retcode; enum determine_dev_size dd; enum dds_flags ddsf; + int err; - memset(&rs, 0, sizeof(struct resize)); - if (!resize_from_tags(nlp->tag_list, &rs)) { - retcode = ERR_MANDATORY_TAG; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) goto fail; + + memset(&rs, 0, sizeof(struct resize_parms)); + if (info->attrs[DRBD_NLA_RESIZE_PARMS]) { + err = resize_parms_from_attrs(&rs, info->attrs); + if (err) { + retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); + goto fail; + } } + mdev = adm_ctx.mdev; if (mdev->state.conn > C_CONNECTED) { retcode = ERR_RESIZE_RESYNC; goto fail; @@ -1644,14 +1829,14 @@ static int drbd_nl_resize(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, } fail: - reply->ret_code = retcode; + drbd_adm_finish(info, 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 drbd_adm_syncer(struct sk_buff *skb, struct genl_info *info) { - int retcode = NO_ERROR; + struct drbd_conf *mdev; + enum drbd_ret_code retcode; int err; int ovr; /* online verify running */ int rsr; /* re-sync running */ @@ -1662,12 +1847,21 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n int *rs_plan_s = NULL; int fifo_size; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto fail; + mdev = adm_ctx.mdev; + if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) { retcode = ERR_NOMEM; + drbd_msg_put_info("unable to allocate cpumask"); goto fail; } - if (nlp->flags & DRBD_NL_SET_DEFAULTS) { + if (((struct drbd_genlmsghdr*)info->userhdr)->flags + & DRBD_GENL_F_SET_DEFAULTS) { memset(&sc, 0, sizeof(struct syncer_conf)); sc.rate = DRBD_RATE_DEF; sc.after = DRBD_AFTER_DEF; @@ -1681,8 +1875,10 @@ static int drbd_nl_syncer_conf(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n } else memcpy(&sc, &mdev->sync_conf, sizeof(struct syncer_conf)); - if (!syncer_conf_from_tags(nlp->tag_list, &sc)) { + err = syncer_conf_from_attrs(&sc, info->attrs); + if (err) { retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); goto fail; } @@ -1832,14 +2028,23 @@ fail: free_cpumask_var(new_cpu_mask); crypto_free_hash(csums_tfm); crypto_free_hash(verify_tfm); - reply->ret_code = retcode; + + drbd_adm_finish(info, 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 drbd_adm_invalidate(struct sk_buff *skb, struct genl_info *info) { - int retcode; + struct drbd_conf *mdev; + int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ + + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + mdev = adm_ctx.mdev; /* If there is still bitmap IO pending, probably because of a previous * resync just being finished, wait for it before requesting a new resync. */ @@ -1862,7 +2067,8 @@ static int drbd_nl_invalidate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nl retcode = drbd_request_state(mdev, NS(conn, C_STARTING_SYNC_T)); } - reply->ret_code = retcode; +out: + drbd_adm_finish(info, retcode); return 0; } @@ -1875,56 +2081,58 @@ static int drbd_bmio_set_susp_al(struct drbd_conf *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) +static int drbd_adm_simple_request_state(struct sk_buff *skb, struct genl_info *info, + union drbd_state mask, union drbd_state val) { - 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)); + enum drbd_ret_code retcode; - 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)); - } + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - reply->ret_code = retcode; + retcode = drbd_request_state(adm_ctx.mdev, mask, val); +out: + drbd_adm_finish(info, 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 drbd_adm_invalidate_peer(struct sk_buff *skb, struct genl_info *info) { - int retcode = NO_ERROR; + return drbd_adm_simple_request_state(skb, info, NS(conn, C_STARTING_SYNC_S)); +} - if (drbd_request_state(mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) - retcode = ERR_PAUSE_IS_SET; +int drbd_adm_pause_sync(struct sk_buff *skb, struct genl_info *info) +{ + enum drbd_ret_code retcode; + + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - reply->ret_code = retcode; + if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 1)) == SS_NOTHING_TO_DO) + retcode = ERR_PAUSE_IS_SET; +out: + drbd_adm_finish(info, 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 drbd_adm_resume_sync(struct sk_buff *skb, struct genl_info *info) { - int retcode = NO_ERROR; union drbd_state s; + enum drbd_ret_code retcode; + + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - if (drbd_request_state(mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { - s = mdev->state; + if (drbd_request_state(adm_ctx.mdev, NS(user_isp, 0)) == SS_NOTHING_TO_DO) { + s = adm_ctx.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; @@ -1933,28 +2141,35 @@ static int drbd_nl_resume_sync(struct drbd_conf *mdev, struct drbd_nl_cfg_req *n } } - reply->ret_code = retcode; +out: + drbd_adm_finish(info, 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) +int drbd_adm_suspend_io(struct sk_buff *skb, struct genl_info *info) { - reply->ret_code = drbd_request_state(mdev, NS(susp, 1)); - - return 0; + return drbd_adm_simple_request_state(skb, info, NS(susp, 1)); } -static int drbd_nl_resume_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_resume_io(struct sk_buff *skb, struct genl_info *info) { + struct drbd_conf *mdev; + int retcode; /* enum drbd_ret_code rsp. enum drbd_state_rv */ + + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + mdev = adm_ctx.mdev; 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) { + retcode = drbd_request_state(mdev, NS3(susp, 0, susp_nod, 0, susp_fen, 0)); + if (retcode == SS_SUCCESS) { if (mdev->state.conn < C_CONNECTED) tl_clear(mdev->tconn); if (mdev->state.disk == D_DISKLESS || mdev->state.disk == D_FAILED) @@ -1962,138 +2177,259 @@ static int drbd_nl_resume_io(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp } drbd_resume_io(mdev); +out: + drbd_adm_finish(info, retcode); return 0; } -static int drbd_nl_outdate(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_outdate(struct sk_buff *skb, struct genl_info *info) { - reply->ret_code = drbd_request_state(mdev, NS(disk, D_OUTDATED)); - return 0; + return drbd_adm_simple_request_state(skb, info, NS(disk, D_OUTDATED)); } -static int drbd_nl_get_config(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int nla_put_status_info(struct sk_buff *skb, struct drbd_conf *mdev, + const struct sib_info *sib) { - unsigned short *tl; - - tl = reply->tag_list; - - if (get_ldev(mdev)) { - tl = disk_conf_to_tags(&mdev->ldev->dc, tl); - put_ldev(mdev); + struct state_info *si = NULL; /* for sizeof(si->member); */ + struct nlattr *nla; + int got_ldev; + int got_net; + int err = 0; + int exclude_sensitive; + + /* If sib != NULL, this is drbd_bcast_event, which anyone can listen + * to. So we better exclude_sensitive information. + * + * If sib == NULL, this is drbd_adm_get_status, executed synchronously + * in the context of the requesting user process. Exclude sensitive + * information, unless current has superuser. + * + * NOTE: for drbd_adm_get_status_all(), this is a netlink dump, and + * relies on the current implementation of netlink_dump(), which + * executes the dump callback successively from netlink_recvmsg(), + * always in the context of the receiving process */ + exclude_sensitive = sib || !capable(CAP_SYS_ADMIN); + + got_ldev = get_ldev(mdev); + got_net = get_net_conf(mdev->tconn); + + /* We need to add connection name and volume number information still. + * Minor number is in drbd_genlmsghdr. */ + nla = nla_nest_start(skb, DRBD_NLA_CFG_CONTEXT); + if (!nla) + goto nla_put_failure; + NLA_PUT_U32(skb, T_ctx_volume, mdev->vnr); + NLA_PUT_STRING(skb, T_ctx_conn_name, mdev->tconn->name); + nla_nest_end(skb, nla); + + if (got_ldev) + if (disk_conf_to_skb(skb, &mdev->ldev->dc, exclude_sensitive)) + goto nla_put_failure; + if (got_net) + if (net_conf_to_skb(skb, mdev->tconn->net_conf, exclude_sensitive)) + goto nla_put_failure; + + if (syncer_conf_to_skb(skb, &mdev->sync_conf, exclude_sensitive)) + goto nla_put_failure; + + nla = nla_nest_start(skb, DRBD_NLA_STATE_INFO); + if (!nla) + goto nla_put_failure; + NLA_PUT_U32(skb, T_sib_reason, sib ? sib->sib_reason : SIB_GET_STATUS_REPLY); + NLA_PUT_U32(skb, T_current_state, mdev->state.i); + NLA_PUT_U64(skb, T_ed_uuid, mdev->ed_uuid); + NLA_PUT_U64(skb, T_capacity, drbd_get_capacity(mdev->this_bdev)); + + if (got_ldev) { + NLA_PUT_U32(skb, T_disk_flags, mdev->ldev->md.flags); + NLA_PUT(skb, T_uuids, sizeof(si->uuids), mdev->ldev->md.uuid); + NLA_PUT_U64(skb, T_bits_total, drbd_bm_bits(mdev)); + NLA_PUT_U64(skb, T_bits_oos, drbd_bm_total_weight(mdev)); + if (C_SYNC_SOURCE <= mdev->state.conn && + C_PAUSED_SYNC_T >= mdev->state.conn) { + NLA_PUT_U64(skb, T_bits_rs_total, mdev->rs_total); + NLA_PUT_U64(skb, T_bits_rs_failed, mdev->rs_failed); + } } - if (get_net_conf(mdev->tconn)) { - tl = net_conf_to_tags(mdev->tconn->net_conf, tl); - put_net_conf(mdev->tconn); + if (sib) { + switch(sib->sib_reason) { + case SIB_SYNC_PROGRESS: + case SIB_GET_STATUS_REPLY: + break; + case SIB_STATE_CHANGE: + NLA_PUT_U32(skb, T_prev_state, sib->os.i); + NLA_PUT_U32(skb, T_new_state, sib->ns.i); + break; + case SIB_HELPER_POST: + NLA_PUT_U32(skb, + T_helper_exit_code, sib->helper_exit_code); + /* fall through */ + case SIB_HELPER_PRE: + NLA_PUT_STRING(skb, T_helper, sib->helper_name); + break; + } } - tl = syncer_conf_to_tags(&mdev->sync_conf, tl); - - put_unaligned(TT_END, tl++); /* Close the tag list */ + nla_nest_end(skb, nla); - return (int)((char *)tl - (char *)reply->tag_list); + if (0) +nla_put_failure: + err = -EMSGSIZE; + if (got_ldev) + put_ldev(mdev); + if (got_net) + put_net_conf(mdev->tconn); + return err; } -static int drbd_nl_get_state(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_get_status(struct sk_buff *skb, struct genl_info *info) { - unsigned short *tl = reply->tag_list; - union drbd_state s = mdev->state; - unsigned long rs_left; - unsigned int res; + enum drbd_ret_code retcode; + int err; - tl = get_state_to_tags((struct get_state *)&s, tl); + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - /* 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); - } + err = nla_put_status_info(adm_ctx.reply_skb, adm_ctx.mdev, NULL); + if (err) { + nlmsg_free(adm_ctx.reply_skb); + return err; } - put_unaligned(TT_END, tl++); /* Close the tag list */ - - return (int)((char *)tl - (char *)reply->tag_list); +out: + drbd_adm_finish(info, retcode); + return 0; } -static int drbd_nl_get_uuids(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_get_status_all(struct sk_buff *skb, struct netlink_callback *cb) { - unsigned short *tl; - - tl = reply->tag_list; + struct drbd_conf *mdev; + struct drbd_genlmsghdr *dh; + int minor = cb->args[0]; + + /* Open coded deferred single idr_for_each_entry iteration. + * This may miss entries inserted after this dump started, + * or entries deleted before they are reached. + * But we need to make sure the mdev won't disappear while + * we are looking at it. */ + + rcu_read_lock(); + mdev = idr_get_next(&minors, &minor); + if (mdev) { + dh = genlmsg_put(skb, NETLINK_CB(cb->skb).pid, + cb->nlh->nlmsg_seq, &drbd_genl_family, + NLM_F_MULTI, DRBD_ADM_GET_STATUS); + if (!dh) + goto errout; + + D_ASSERT(mdev->minor == minor); + + dh->minor = minor; + dh->ret_code = NO_ERROR; + + if (nla_put_status_info(skb, mdev, NULL)) { + genlmsg_cancel(skb, dh); + goto errout; + } + genlmsg_end(skb, dh); + } - 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 */ +errout: + rcu_read_unlock(); + /* where to start idr_get_next with the next iteration */ + cb->args[0] = minor+1; - return (int)((char *)tl - (char *)reply->tag_list); + /* No more minors found: empty skb. Which will terminate the dump. */ + return skb->len; } -/** - * 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) +int drbd_adm_get_timeout_type(struct sk_buff *skb, struct genl_info *info) { - unsigned short *tl; - char rv; - - tl = reply->tag_list; + enum drbd_ret_code retcode; + struct timeout_parms tp; + int err; - rv = mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : - test_bit(USE_DEGR_WFC_T, &mdev->flags) ? UT_DEGRADED : UT_DEFAULT; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - tl = tl_add_blob(tl, T_use_degraded, &rv, sizeof(rv)); - put_unaligned(TT_END, tl++); /* Close the tag list */ + tp.timeout_type = + adm_ctx.mdev->state.pdsk == D_OUTDATED ? UT_PEER_OUTDATED : + test_bit(USE_DEGR_WFC_T, &adm_ctx.mdev->flags) ? UT_DEGRADED : + UT_DEFAULT; - return (int)((char *)tl - (char *)reply->tag_list); + err = timeout_parms_to_priv_skb(adm_ctx.reply_skb, &tp); + if (err) { + nlmsg_free(adm_ctx.reply_skb); + return err; + } +out: + drbd_adm_finish(info, retcode); + return 0; } -static int drbd_nl_start_ov(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +int drbd_adm_start_ov(struct sk_buff *skb, struct genl_info *info) { - /* default to resume from last known position, if possible */ - struct start_ov args = - { .start_sector = mdev->ov_start_sector }; + struct drbd_conf *mdev; + enum drbd_ret_code retcode; - if (!start_ov_from_tags(nlp->tag_list, &args)) { - reply->ret_code = ERR_MANDATORY_TAG; - return 0; - } + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + mdev = adm_ctx.mdev; + if (info->attrs[DRBD_NLA_START_OV_PARMS]) { + /* resume from last known position, if possible */ + struct start_ov_parms parms = + { .ov_start_sector = mdev->ov_start_sector }; + int err = start_ov_parms_from_attrs(&parms, info->attrs); + if (err) { + retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); + goto out; + } + /* w_make_ov_request expects position to be aligned */ + mdev->ov_start_sector = parms.ov_start_sector & ~BM_SECT_PER_BIT; + } /* 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)); + retcode = drbd_request_state(mdev,NS(conn,C_VERIFY_S)); +out: + drbd_adm_finish(info, retcode); 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 drbd_adm_new_c_uuid(struct sk_buff *skb, struct genl_info *info) { - int retcode = NO_ERROR; + struct drbd_conf *mdev; + enum drbd_ret_code retcode; int skip_initial_sync = 0; int err; + struct new_c_uuid_parms args; - struct new_c_uuid args; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out_nolock; - memset(&args, 0, sizeof(struct new_c_uuid)); - if (!new_c_uuid_from_tags(nlp->tag_list, &args)) { - reply->ret_code = ERR_MANDATORY_TAG; - return 0; + mdev = adm_ctx.mdev; + memset(&args, 0, sizeof(args)); + if (info->attrs[DRBD_NLA_NEW_C_UUID_PARMS]) { + err = new_c_uuid_parms_from_attrs(&args, info->attrs); + if (err) { + retcode = ERR_MANDATORY_TAG; + drbd_msg_put_info(from_attrs_err_to_txt(err)); + goto out_nolock; + } } mutex_lock(mdev->state_mutex); /* Protects us against serialized state changes. */ @@ -2139,510 +2475,164 @@ out_dec: put_ldev(mdev); out: mutex_unlock(mdev->state_mutex); - - reply->ret_code = retcode; - return 0; -} - -static int drbd_nl_new_conn(struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) -{ - struct new_connection args; - - if (!new_connection_from_tags(nlp->tag_list, &args)) { - reply->ret_code = ERR_MANDATORY_TAG; - return 0; - } - - reply->ret_code = NO_ERROR; - if (!drbd_new_tconn(args.name)) - reply->ret_code = ERR_NOMEM; - - return 0; -} - -static int drbd_nl_new_minor(struct drbd_tconn *tconn, - struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) -{ - struct new_minor args; - - args.vol_nr = 0; - args.minor = 0; - - if (!new_minor_from_tags(nlp->tag_list, &args)) { - reply->ret_code = ERR_MANDATORY_TAG; - return 0; - } - - reply->ret_code = conn_new_minor(tconn, args.minor, args.vol_nr); - +out_nolock: + drbd_adm_finish(info, retcode); return 0; } -static int drbd_nl_del_minor(struct drbd_conf *mdev, struct drbd_nl_cfg_req *nlp, - struct drbd_nl_cfg_reply *reply) +static enum drbd_ret_code +drbd_check_conn_name(const char *name) { - if (mdev->state.disk == D_DISKLESS && - mdev->state.conn == C_STANDALONE && - mdev->state.role == R_SECONDARY) { - drbd_delete_device(mdev_to_minor(mdev)); - reply->ret_code = NO_ERROR; - } else { - reply->ret_code = ERR_MINOR_CONFIGURED; + if (!name || !name[0]) { + drbd_msg_put_info("connection name missing"); + return ERR_MANDATORY_TAG; } - return 0; -} - -static int drbd_nl_del_conn(struct drbd_tconn *tconn, - struct drbd_nl_cfg_req *nlp, struct drbd_nl_cfg_reply *reply) -{ - if (conn_lowest_minor(tconn) < 0) { - drbd_free_tconn(tconn); - reply->ret_code = NO_ERROR; - } else { - reply->ret_code = ERR_CONN_IN_USE; + /* if we want to use these in sysfs/configfs/debugfs some day, + * we must not allow slashes */ + if (strchr(name, '/')) { + drbd_msg_put_info("invalid connection name"); + return ERR_INVALID_REQUEST; } - - return 0; + return NO_ERROR; } -enum cn_handler_type { - CHT_MINOR, - CHT_CONN, - CHT_CTOR, - /* CHT_RES, later */ -}; -struct cn_handler_struct { - enum cn_handler_type type; - union { - int (*minor_based)(struct drbd_conf *, - struct drbd_nl_cfg_req *, - struct drbd_nl_cfg_reply *); - int (*conn_based)(struct drbd_tconn *, - struct drbd_nl_cfg_req *, - struct drbd_nl_cfg_reply *); - int (*constructor)(struct drbd_nl_cfg_req *, - struct drbd_nl_cfg_reply *); - }; - int reply_body_size; -}; - -static struct cn_handler_struct cnd_table[] = { - [ P_primary ] = { CHT_MINOR, { &drbd_nl_primary }, 0 }, - [ P_secondary ] = { CHT_MINOR, { &drbd_nl_secondary }, 0 }, - [ P_disk_conf ] = { CHT_MINOR, { &drbd_nl_disk_conf }, 0 }, - [ P_detach ] = { CHT_MINOR, { &drbd_nl_detach }, 0 }, - [ P_net_conf ] = { CHT_CONN, { .conn_based = &drbd_nl_net_conf }, 0 }, - [ P_disconnect ] = { CHT_CONN, { .conn_based = &drbd_nl_disconnect }, 0 }, - [ P_resize ] = { CHT_MINOR, { &drbd_nl_resize }, 0 }, - [ P_syncer_conf ] = { CHT_MINOR, { &drbd_nl_syncer_conf },0 }, - [ P_invalidate ] = { CHT_MINOR, { &drbd_nl_invalidate }, 0 }, - [ P_invalidate_peer ] = { CHT_MINOR, { &drbd_nl_invalidate_peer },0 }, - [ P_pause_sync ] = { CHT_MINOR, { &drbd_nl_pause_sync }, 0 }, - [ P_resume_sync ] = { CHT_MINOR, { &drbd_nl_resume_sync },0 }, - [ P_suspend_io ] = { CHT_MINOR, { &drbd_nl_suspend_io }, 0 }, - [ P_resume_io ] = { CHT_MINOR, { &drbd_nl_resume_io }, 0 }, - [ P_outdate ] = { CHT_MINOR, { &drbd_nl_outdate }, 0 }, - [ P_get_config ] = { CHT_MINOR, { &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 ] = { CHT_MINOR, { &drbd_nl_get_state }, - sizeof(struct get_state_tag_len_struct) + - sizeof(struct sync_progress_tag_len_struct) }, - [ P_get_uuids ] = { CHT_MINOR, { &drbd_nl_get_uuids }, - sizeof(struct get_uuids_tag_len_struct) }, - [ P_get_timeout_flag ] = { CHT_MINOR, { &drbd_nl_get_timeout_flag }, - sizeof(struct get_timeout_flag_tag_len_struct)}, - [ P_start_ov ] = { CHT_MINOR, { &drbd_nl_start_ov }, 0 }, - [ P_new_c_uuid ] = { CHT_MINOR, { &drbd_nl_new_c_uuid }, 0 }, - [ P_new_connection ] = { CHT_CTOR, { .constructor = &drbd_nl_new_conn }, 0 }, - [ P_new_minor ] = { CHT_CONN, { .conn_based = &drbd_nl_new_minor }, 0 }, - [ P_del_minor ] = { CHT_MINOR, { &drbd_nl_del_minor }, 0 }, - [ P_del_connection ] = { CHT_CONN, { .conn_based = &drbd_nl_del_conn }, 0 }, -}; - -static void drbd_connector_callback(struct cn_msg *req, struct netlink_skb_parms *nsp) +int drbd_adm_create_connection(struct sk_buff *skb, struct genl_info *info) { - 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; - struct drbd_tconn *tconn; - 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; - } + enum drbd_ret_code retcode; - if (nlp->packet_type >= P_nl_after_last_packet || - nlp->packet_type == P_return_code_only) { - retcode = ERR_PACKET_NR; - goto fail; - } + retcode = drbd_adm_prepare(skb, info, 0); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - cm = cnd_table + nlp->packet_type; + retcode = drbd_check_conn_name(adm_ctx.conn_name); + if (retcode != NO_ERROR) + goto out; - /* This may happen if packet number is 0: */ - if (cm->minor_based == NULL) { - retcode = ERR_PACKET_NR; - goto fail; + if (adm_ctx.tconn) { + retcode = ERR_INVALID_REQUEST; + drbd_msg_put_info("connection exists"); + goto out; } - 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) { + if (!drbd_new_tconn(adm_ctx.conn_name)) 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. */ - - retcode = ERR_MINOR_INVALID; - rr = 0; - switch (cm->type) { - case CHT_MINOR: - mdev = minor_to_mdev(nlp->drbd_minor); - if (!mdev) - goto fail; - rr = cm->minor_based(mdev, nlp, reply); - break; - case CHT_CONN: - tconn = conn_by_name(nlp->obj_name); - if (!tconn) { - retcode = ERR_CONN_NOT_KNOWN; - goto fail; - } - rr = cm->conn_based(tconn, nlp, reply); - break; - case CHT_CTOR: - rr = cm->constructor(nlp, reply); - break; - /* case CHT_RES: */ - } - - 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((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_inc_return(&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_inc_return(&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); +out: + drbd_adm_finish(info, retcode); + return 0; } -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_peer_request *peer_req) +int drbd_adm_add_minor(struct sk_buff *skb, struct genl_info *info) { - struct cn_msg *cn_reply; - struct drbd_nl_cfg_reply *reply; - unsigned short *tl; - struct page *page; - unsigned len; + struct drbd_genlmsghdr *dh = info->userhdr; + enum drbd_ret_code retcode; - if (!peer_req) - return; - if (!reason || !reason[0]) - return; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - /* 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)peer_req->i.sector, - peer_req->i.size); - return; + /* FIXME drop minor_count parameter, limit to MINORMASK */ + if (dh->minor >= minor_count) { + drbd_msg_put_info("requested minor out of range"); + retcode = ERR_INVALID_REQUEST; + goto out; } - - 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, &peer_req->i.sector); - tl = tl_add_int(tl, T_ee_block_id, &peer_req->block_id); - - /* dump the first 32k */ - len = min_t(unsigned, peer_req->i.size, 32 << 10); - put_unaligned(T_ee_data, tl++); - put_unaligned(len, tl++); - - page = peer_req->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; + /* FIXME we need a define here */ + if (adm_ctx.volume >= 256) { + drbd_msg_put_info("requested volume id out of range"); + retcode = ERR_INVALID_REQUEST; + goto out; } - 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_inc_return(&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); + retcode = conn_new_minor(adm_ctx.tconn, dh->minor, adm_ctx.volume); +out: + drbd_adm_finish(info, retcode); + return 0; } -void drbd_bcast_sync_progress(struct drbd_conf *mdev) +int drbd_adm_delete_minor(struct sk_buff *skb, struct genl_info *info) { - 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_inc_return(&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; + struct drbd_conf *mdev; + enum drbd_ret_code retcode; - reply->packet_type = P_sync_progress; - reply->minor = mdev_to_minor(mdev); - reply->ret_code = NO_ERROR; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_MINOR); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; - cn_netlink_send(cn_reply, CN_IDX_DRBD, GFP_NOIO); + mdev = adm_ctx.mdev; + if (mdev->state.disk == D_DISKLESS && + mdev->state.conn == C_STANDALONE && + mdev->state.role == R_SECONDARY) { + drbd_delete_device(mdev_to_minor(mdev)); + retcode = NO_ERROR; + } else + retcode = ERR_MINOR_CONFIGURED; +out: + drbd_adm_finish(info, retcode); + return 0; } -int __init drbd_nl_init(void) +int drbd_adm_delete_connection(struct sk_buff *skb, struct genl_info *info) { - 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--); + enum drbd_ret_code retcode; - if (err) { - printk(KERN_ERR "drbd: cn_drbd failed to register\n"); - return err; + retcode = drbd_adm_prepare(skb, info, DRBD_ADM_NEED_CONN); + if (!adm_ctx.reply_skb) + return retcode; + if (retcode != NO_ERROR) + goto out; + + if (conn_lowest_minor(adm_ctx.tconn) < 0) { + drbd_free_tconn(adm_ctx.tconn); + retcode = NO_ERROR; + } else { + retcode = ERR_CONN_IN_USE; } +out: + drbd_adm_finish(info, retcode); return 0; } -void drbd_nl_cleanup(void) +void drbd_bcast_event(struct drbd_conf *mdev, const struct sib_info *sib) { - static struct cb_id cn_id_drbd; - - cn_id_drbd.idx = cn_idx; - cn_id_drbd.val = CN_VAL_DRBD; + static atomic_t drbd_genl_seq = ATOMIC_INIT(2); /* two. */ + struct sk_buff *msg; + struct drbd_genlmsghdr *d_out; + unsigned seq; + int err = -ENOMEM; + + seq = atomic_inc_return(&drbd_genl_seq); + msg = genlmsg_new(NLMSG_GOODSIZE, GFP_NOIO); + if (!msg) + goto failed; + + err = -EMSGSIZE; + d_out = genlmsg_put(msg, 0, seq, &drbd_genl_family, 0, DRBD_EVENT); + if (!d_out) /* cannot happen, but anyways. */ + goto nla_put_failure; + d_out->minor = mdev_to_minor(mdev); + d_out->ret_code = 0; + + if (nla_put_status_info(msg, mdev, sib)) + goto nla_put_failure; + genlmsg_end(msg, d_out); + err = drbd_genl_multicast_events(msg, 0); + /* msg has been consumed or freed in netlink_broadcast() */ + if (err && err != -ESRCH) + goto failed; - cn_del_callback(&cn_id_drbd); -} + return; -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); +nla_put_failure: + nlmsg_free(msg); +failed: + dev_err(DEV, "Error %d while broadcasting event. " + "Event seq:%u sib_reason:%u\n", + err, seq, sib->sib_reason); } - diff --git a/drivers/block/drbd/drbd_state.c b/drivers/block/drbd/drbd_state.c index ffee90d6d37..a280bc238ac 100644 --- a/drivers/block/drbd/drbd_state.c +++ b/drivers/block/drbd/drbd_state.c @@ -970,6 +970,11 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, enum drbd_fencing_p fp; enum drbd_req_event what = NOTHING; union drbd_state nsm = (union drbd_state){ .i = -1 }; + struct sib_info sib; + + sib.sib_reason = SIB_STATE_CHANGE; + sib.os = os; + sib.ns = ns; if (os.conn != C_CONNECTED && ns.conn == C_CONNECTED) { clear_bit(CRASHED_PRIMARY, &mdev->flags); @@ -984,7 +989,7 @@ static void after_state_ch(struct drbd_conf *mdev, union drbd_state os, } /* Inform userspace about the change... */ - drbd_bcast_state(mdev, ns); + drbd_bcast_event(mdev, &sib); if (!(os.role == R_PRIMARY && os.disk < D_UP_TO_DATE && os.pdsk < D_UP_TO_DATE) && (ns.role == R_PRIMARY && ns.disk < D_UP_TO_DATE && ns.pdsk < D_UP_TO_DATE)) diff --git a/include/linux/drbd.h b/include/linux/drbd.h index e192167e614..d28fdd8fcd4 100644 --- a/include/linux/drbd.h +++ b/include/linux/drbd.h @@ -51,7 +51,6 @@ #endif - extern const char *drbd_buildtag(void); #define REL_VERSION "8.3.11" #define API_VERSION 88 @@ -159,6 +158,7 @@ enum drbd_ret_code { ERR_CONN_IN_USE = 159, ERR_MINOR_CONFIGURED = 160, ERR_MINOR_EXISTS = 161, + ERR_INVALID_REQUEST = 162, /* insert new ones above this line */ AFTER_LAST_ERR_CODE @@ -349,37 +349,4 @@ enum drbd_timeout_flag { #define DRBD_MD_INDEX_FLEX_EXT -2 #define DRBD_MD_INDEX_FLEX_INT -3 -/* Start of the new netlink/connector stuff */ - -enum drbd_ncr_flags { - DRBD_NL_CREATE_DEVICE = 0x01, - DRBD_NL_SET_DEFAULTS = 0x02, -}; -#define DRBD_NL_OBJ_NAME_LEN 32 - - -/* For searching a vacant cn_idx value */ -#define CN_IDX_STEP 6977 - -struct drbd_nl_cfg_req { - int packet_type; - union { - struct { - unsigned int drbd_minor; - enum drbd_ncr_flags flags; - }; - struct { - char obj_name[DRBD_NL_OBJ_NAME_LEN]; - }; - }; - unsigned short tag_list[]; -}; - -struct drbd_nl_cfg_reply { - int packet_type; - unsigned int minor; - int ret_code; /* enum ret_code or set_st_err_t */ - unsigned short tag_list[]; /* only used with get_* calls */ -}; - #endif diff --git a/include/linux/genl_magic_func.h b/include/linux/genl_magic_func.h index 8a86f659d36..c8c67239f61 100644 --- a/include/linux/genl_magic_func.h +++ b/include/linux/genl_magic_func.h @@ -95,7 +95,7 @@ static struct nla_policy s_name ## _nl_policy[] __read_mostly = \ #endif #endif -#if 1 +#ifdef GENL_MAGIC_DEBUG static void dprint_field(const char *dir, int nla_type, const char *name, void *valp) { |