Viewing: obd_config.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* Config API
*/
#define DEBUG_SUBSYSTEM S_CLASS
#include <linux/delay.h>
#include <linux/kobject.h>
#include <linux/string.h>
#ifdef CONFIG_LUSTRE_FS_SERVER
#include <cfs_hash.h>
#endif
#include <llog_swab.h>
#include <lprocfs_status.h>
#include <lustre_disk.h>
#include <uapi/linux/lustre/lustre_ioctl.h>
#include <lustre_log.h>
#include <uapi/linux/lustre/lustre_param.h>
#include <obd_class.h>
#include "llog_internal.h"
#ifdef CONFIG_LUSTRE_FS_SERVER
static struct cfs_hash_ops gen_hash_ops;
#endif /* CONFIG_LUSTRE_FS_SERVER */
/*
* uuid<->export lustre hash operations
*/
/*
* NOTE: It is impossible to find an export that is in failed
* state with this function
*/
static int
uuid_keycmp(struct rhashtable_compare_arg *arg, const void *obj)
{
const struct obd_uuid *uuid = arg->key;
const struct obd_export *exp = obj;
if (obd_uuid_equals(uuid, &exp->exp_client_uuid) &&
!exp->exp_failed)
return 0;
return -ESRCH;
}
static void
obd_export_exit(void *vexport, void *data)
{
struct obd_export *exp = vexport;
class_export_put(exp);
}
static const struct rhashtable_params uuid_hash_params = {
.key_len = sizeof(struct obd_uuid),
.key_offset = offsetof(struct obd_export, exp_client_uuid),
.head_offset = offsetof(struct obd_export, exp_uuid_hash),
.obj_cmpfn = uuid_keycmp,
.automatic_shrinking = true,
};
int obd_uuid_add(struct obd_device *obd, struct obd_export *export)
{
int rc;
class_export_get(export);
rcu_read_lock();
rc = rhashtable_lookup_insert_fast(&obd->obd_uuid_hash,
&export->exp_uuid_hash,
uuid_hash_params);
if (rc) {
class_export_put(export);
if (rc != -EEXIST) {
/* map obscure error codes to -ENOMEM */
rc = -ENOMEM;
} else {
rc = -EALREADY;
}
}
rcu_read_unlock();
return rc;
}
EXPORT_SYMBOL(obd_uuid_add);
void obd_uuid_del(struct obd_device *obd, struct obd_export *export)
{
int rc;
rcu_read_lock();
rc = rhashtable_remove_fast(&obd->obd_uuid_hash,
&export->exp_uuid_hash,
uuid_hash_params);
if (!rc)
class_export_put(export);
rcu_read_unlock();
}
EXPORT_SYMBOL(obd_uuid_del);
#ifdef CONFIG_LUSTRE_FS_SERVER
/* obd_uuid_lookup() is used only server side by target_handle_connect(),
* mdt_hsm_agent_send(), and obd_export_evict_by_uuid().
*/
struct obd_export *obd_uuid_lookup(struct obd_device *obd,
struct obd_uuid *uuid)
{
struct obd_export *export = NULL;
rcu_read_lock();
export = rhashtable_lookup_fast(&obd->obd_uuid_hash, uuid,
uuid_hash_params);
if (export && !refcount_inc_not_zero(&export->exp_handle.h_ref))
export = NULL;
rcu_read_unlock();
return export;
}
EXPORT_SYMBOL(obd_uuid_lookup);
/*
* nid<->export hash operations
*/
static u32 nid_keyhash(const void *data, u32 key_len, u32 seed)
{
const struct obd_export *exp = data;
void *key;
if (!exp->exp_connection)
return 0;
key = &exp->exp_connection->c_peer.nid;
return jhash2(key, key_len / sizeof(u32), seed);
}
/*
* NOTE: It is impossible to find an export that is in failed
* state with this function
*/
static int
nid_keycmp(struct rhashtable_compare_arg *arg, const void *obj)
{
const struct lnet_nid *nid = arg->key;
const struct obd_export *exp = obj;
if (nid_same(&exp->exp_connection->c_peer.nid, nid))
return 0;
return -ESRCH;
}
static void
nid_export_exit(void *vexport, void *data)
{
struct obd_export *exp = vexport;
class_export_put(exp);
}
static const struct rhashtable_params nid_hash_params = {
.key_len = sizeof(struct lnet_nid),
.head_offset = offsetof(struct obd_export, exp_nid_hash),
.obj_hashfn = nid_keyhash,
.obj_cmpfn = nid_keycmp,
.automatic_shrinking = true,
};
int obd_nid_add(struct obd_device *obd, struct obd_export *exp)
{
int rc;
if (exp == exp->exp_obd->obd_self_export || exp->exp_hashed)
return 0;
class_export_get(exp);
rc = rhltable_insert_key(&obd->obd_nid_hash,
&exp->exp_connection->c_peer.nid,
&exp->exp_nid_hash,
nid_hash_params);
if (rc) {
class_export_put(exp);
/* map obscure error codes to -ENOMEM */
rc = -ENOMEM;
} else {
exp->exp_hashed = 1;
}
return rc;
}
EXPORT_SYMBOL(obd_nid_add);
void obd_nid_del(struct obd_device *obd, struct obd_export *exp)
{
int rc;
if (exp == exp->exp_obd->obd_self_export || !exp->exp_hashed)
return;
rc = rhltable_remove(&obd->obd_nid_hash, &exp->exp_nid_hash,
nid_hash_params);
if (rc == 0) {
class_export_put(exp);
exp->exp_hashed = 0;
}
}
EXPORT_SYMBOL(obd_nid_del);
int obd_nid_export_for_each(struct obd_device *obd, struct lnet_nid *nid,
int cb(struct obd_export *exp, void *data),
void *data)
{
struct rhlist_head *exports, *tmp;
struct obd_export *exp;
int ret = 0;
rcu_read_lock();
exports = rhltable_lookup(&obd->obd_nid_hash, nid, nid_hash_params);
if (!exports) {
ret = -ENODEV;
goto out_unlock;
}
rhl_for_each_entry_rcu(exp, tmp, exports, exp_nid_hash) {
if (!exp->exp_failed && cb(exp, data))
ret++;
}
out_unlock:
rcu_read_unlock();
return ret;
}
EXPORT_SYMBOL(obd_nid_export_for_each);
/*
* nid<->nidstats hash operations
*/
static u32 nid_stats_keyhash(const void *data, u32 key_len, u32 seed)
{
return jhash2(data, key_len / sizeof(u32), seed);
}
static int
nid_stats_keycmp(struct rhashtable_compare_arg *arg, const void *obj)
{
const struct lnet_nid *nid = arg->key;
const struct nid_stat *ns = obj;
return nid_same(&ns->nid, (struct lnet_nid *)nid) ? 0 : -ESRCH;
}
static void
nid_stats_exit(void *vdata, void *data)
{
struct nid_stat *ns = vdata;
nidstat_putref(ns);
}
static const struct rhashtable_params nid_stats_hash_params = {
.key_len = sizeof(struct lnet_nid),
.key_offset = offsetof(struct nid_stat, nid),
.head_offset = offsetof(struct nid_stat, nid_hash),
.hashfn = nid_stats_keyhash,
.obj_cmpfn = nid_stats_keycmp,
.automatic_shrinking = true,
};
struct nid_stat *obd_nid_stats_get(struct obd_device *obd, struct nid_stat *ns)
{
struct rhlist_head *exports, *pos;
struct nid_stat *ns2 = NULL, *tmp;
rcu_read_lock();
exports = rhltable_lookup(&obd->obd_nid_stats_hash, &ns->nid,
nid_stats_hash_params);
if (!exports)
goto insert_key;
rhl_for_each_entry_rcu(tmp, pos, exports, nid_hash) {
if (obd == tmp->nid_obd) {
nidstat_getref(tmp);
ns2 = tmp;
goto unlock;
}
}
if (!ns2) {
int rc;
insert_key:
nidstat_getref(ns);
rc = rhltable_insert_key(&obd->obd_nid_stats_hash, &ns->nid,
&ns->nid_hash, nid_stats_hash_params);
if (rc < 0) {
nidstat_putref(ns);
ns2 = ERR_PTR(rc);
} else {
ns2 = ns;
}
}
unlock:
rcu_read_unlock();
return ns2;
}
EXPORT_SYMBOL(obd_nid_stats_get);
void obd_nid_stats_put(struct obd_device *obd, struct nid_stat *ns)
{
int rc;
rcu_read_lock();
rc = rhltable_remove(&obd->obd_nid_stats_hash, &ns->nid_hash,
nid_stats_hash_params);
if (rc == 0)
nidstat_putref(ns);
rcu_read_unlock();
}
EXPORT_SYMBOL(obd_nid_stats_put);
#endif /* CONFIG_LUSTRE_FS_SERVER */
/*********** string parsing utils *********/
/* returns 0 if we find this key in the buffer, else 1 */
int class_find_param(char *buf, char *key, char **valp)
{
char *ptr;
if (!buf)
return 1;
ptr = strstr(buf, key);
if (!ptr)
return 1;
if (valp)
*valp = ptr + strlen(key);
return 0;
}
EXPORT_SYMBOL(class_find_param);
/**
* class_find_old_param() - Find old & new parameters
* @param: proc parameter
* @ptr: an array which contains the mapping from old parameters to new ones
*
* Check whether the proc parameter @param is an old parameter or not from
* the array @ptr which contains the mapping from old parameters to new ones.
* If it's an old one, then return the pointer to the cfg_interop_param struc-
* ture which contains both the old and new parameters.
*
* Return:
* * %cfg_interop_param: pointer which contains old and new parameters
* * %NULL @param or @ptr is NULL, @param is not an old parameter
*/
struct cfg_interop_param *class_find_old_param(const char *param,
struct cfg_interop_param *ptr)
{
char *value = NULL;
int name_len = 0;
if (!param || !ptr)
RETURN(NULL);
value = strchr(param, '=');
if (value)
name_len = value - param;
else
name_len = strlen(param);
while (ptr->old_param) {
if (strncmp(param, ptr->old_param, name_len) == 0 &&
name_len == strlen(ptr->old_param))
RETURN(ptr);
ptr++;
}
RETURN(NULL);
}
EXPORT_SYMBOL(class_find_old_param);
/**
* class_get_next_param() - Finds a parameter in @params and copies it to @copy
* @params: input string of params
* @copy: destination buffer
*
* Leading spaces are skipped. Next space or end of string is the
* parameter terminator with the exception that spaces inside single or double
* quotes get included into a parameter. The parameter is copied into @copy
* which has to be allocated big enough by a caller, quotes are stripped in
* the copy and the copy is terminated by 0.
*
* On return @params is set to next parameter or to NULL if last
* parameter is returned.
*
* Return:
* * %0 if parameter is returned in @copy
* * %1 on error
* * %-EINVAL if unbalanced quota is found
*/
int class_get_next_param(char **params, char *copy)
{
char *q1, *q2, *str;
int len;
str = *params;
while (*str == ' ')
str++;
if (*str == '\0') {
*params = NULL;
return 1;
}
while (1) {
q1 = strpbrk(str, " '\"");
if (!q1) {
len = strlen(str);
memcpy(copy, str, len);
copy[len] = '\0';
*params = NULL;
return 0;
}
len = q1 - str;
if (*q1 == ' ') {
memcpy(copy, str, len);
copy[len] = '\0';
*params = str + len;
return 0;
}
memcpy(copy, str, len);
copy += len;
/* search for the matching closing quote */
str = q1 + 1;
q2 = strchr(str, *q1);
if (!q2) {
CERROR("Unbalanced quota in parameters: \"%s\"\n",
*params);
return -EINVAL;
}
len = q2 - str;
memcpy(copy, str, len);
copy += len;
str = q2 + 1;
}
return 1;
}
EXPORT_SYMBOL(class_get_next_param);
/*
* returns 0 if this is the first key in the buffer, else 1.
* valp points to first char after key.
*/
int class_match_param(char *buf, const char *key, char **valp)
{
if (!buf)
return 1;
if (memcmp(buf, key, strlen(key)) != 0)
return 1;
if (valp)
*valp = buf + strlen(key);
return 0;
}
EXPORT_SYMBOL(class_match_param);
static int parse_nid(char *buf, void *value, int quiet)
{
struct lnet_nid *nid = value;
if (libcfs_strnid(nid, buf) == 0)
return 0;
if (!quiet)
LCONSOLE_ERROR("Can't parse NID '%s'\n", buf);
return -EINVAL;
}
static int parse_net(char *buf, void *value)
{
__u32 *net = (__u32 *)value;
*net = libcfs_str2net(buf);
CDEBUG(D_INFO, "Net %s\n", libcfs_net2str(*net));
return 0;
}
enum {
CLASS_PARSE_NID = 1,
CLASS_PARSE_NET,
};
/*
* 0 is good NID,
* 1 not found
* < 0 error
* endh is set to next separator
*/
static int class_parse_value(char *buf, int opc, void *value, char **endh,
int quiet)
{
char *endp;
char tmp;
int rc = 0;
int ncolons = 0;
if (!buf)
return 1;
while (*buf == ',' || *buf == ':') {
if (*buf == ':')
ncolons++;
else
ncolons = 0;
buf++;
}
/* IPv6 addresses can start with '::' */
if (opc == CLASS_PARSE_NID && ncolons >= 2)
buf = buf - 2;
if (*buf == ' ' || *buf == '/' || *buf == '\0')
return 1;
/* NID separators or end of NIDs. Large NIDs can contain ':' so
* skip ahead to @ and then look for one of the delimiters.
*/
if (opc == CLASS_PARSE_NID) {
endp = strchr(buf, '@');
if (!endp)
return 1;
endp = strpbrk(endp, ",: /");
} else {
endp = strpbrk(buf, ",: /");
}
if (!endp)
endp = buf + strlen(buf);
tmp = *endp;
*endp = '\0';
switch (opc) {
case CLASS_PARSE_NID:
rc = parse_nid(buf, value, quiet);
break;
case CLASS_PARSE_NET:
rc = parse_net(buf, value);
break;
default:
LBUG();
}
*endp = tmp;
if (rc != 0)
return rc;
if (endh)
*endh = endp;
return 0;
}
int class_parse_nid(char *buf, struct lnet_nid *nid, char **endh)
{
return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 0);
}
EXPORT_SYMBOL(class_parse_nid);
int class_parse_nid_quiet(char *buf, struct lnet_nid *nid, char **endh)
{
return class_parse_value(buf, CLASS_PARSE_NID, (void *)nid, endh, 1);
}
EXPORT_SYMBOL(class_parse_nid_quiet);
int class_parse_net(char *buf, __u32 *net, char **endh)
{
return class_parse_value(buf, CLASS_PARSE_NET, (void *)net, endh, 0);
}
EXPORT_SYMBOL(class_parse_net);
/*
* 1 param contains key and match
* 0 param contains key and not match
* -1 param does not contain key
*/
int class_match_nid(char *buf, char *key, struct lnet_nid *nid)
{
struct lnet_nid tmp;
int rc = -1;
while (class_find_param(buf, key, &buf) == 0) {
/*
* please restrict to the NIDs pertaining to
* the specified NIDs
*/
while (class_parse_nid(buf, &tmp, &buf) == 0) {
if (nid_same(&tmp, nid))
return 1;
}
rc = 0;
}
return rc;
}
EXPORT_SYMBOL(class_match_nid);
int class_match_net(char *buf, char *key, __u32 net)
{
__u32 tmp;
int rc = -1;
while (class_find_param(buf, key, &buf) == 0) {
/*
* please restrict to the NIDs pertaining to
* the specified networks
*/
while (class_parse_net(buf, &tmp, &buf) == 0) {
if (tmp == net)
return 1;
}
rc = 0;
}
return rc;
}
EXPORT_SYMBOL(class_match_net);
char *lustre_cfg_string(struct lustre_cfg *lcfg, u32 index)
{
char *s;
if (index >= lcfg->lcfg_bufcount)
return NULL;
if (!lcfg->lcfg_buflens[index])
return NULL;
s = lustre_cfg_buf(lcfg, index);
if (!s)
return NULL;
/*
* make sure it's NULL terminated, even if this kills a char
* of data. Try to use the padding first though.
*/
if (s[lcfg->lcfg_buflens[index] - 1] != '\0') {
size_t last = ALIGN(lcfg->lcfg_buflens[index], 8) - 1;
char lost;
/* Use the smaller value */
if (last > lcfg->lcfg_buflens[index])
last = lcfg->lcfg_buflens[index];
lost = s[last];
s[last] = '\0';
if (lost != '\0') {
CWARN("Truncated buf %d to '%s' (lost '%c'...)\n",
index, s, lost);
}
}
return s;
}
EXPORT_SYMBOL(lustre_cfg_string);
struct obd_device *class_attach_name(const char *typename,
const char *name, const char *uuid)
{
struct obd_export *exp;
struct obd_device *obd;
int rc;
ENTRY;
if (strlen(uuid) >= sizeof(struct obd_uuid)) {
CERROR("%s: uuid must be < %d bytes long\n",
name, (int)sizeof(struct obd_uuid));
RETURN(ERR_PTR(-EINVAL));
}
obd = class_newdev(typename, name, uuid);
if (IS_ERR(obd)) { /* Already exists or out of obds */
CERROR("Cannot create device %s of type %s : %d\n",
name, typename, (int)PTR_ERR(obd));
RETURN(obd);
}
LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
"obd %px obd_magic %08X != %08X\n",
obd, obd->obd_magic, OBD_DEVICE_MAGIC);
LASSERTF(strncmp(obd->obd_name, name, strlen(name)) == 0,
"%px obd_name %s != %s\n", obd, obd->obd_name, name);
exp = class_new_export_self(obd, &obd->obd_uuid);
if (IS_ERR(exp)) {
class_free_dev(obd);
RETURN(ERR_CAST(exp));
}
obd->obd_self_export = exp;
class_export_put(exp);
rc = class_register_device(obd);
if (rc != 0) {
class_decref(obd, "newdev", obd);
RETURN(ERR_PTR(rc));
}
set_bit(OBDF_ATTACHED, obd->obd_flags);
CDEBUG(D_IOCTL, "OBD: dev %d attached type %s with refcount %d\n",
obd->obd_minor, typename, kref_read(&obd->obd_refcount));
RETURN(obd);
}
EXPORT_SYMBOL(class_attach_name);
/**
* class_setup() - Set obd device active
* @obd: pointer to obd device which is being setup (active)
* @lcfg: pointer to lustre_cfg (holds parameters like: device name, type, UUID)
*
* Create hashes, self-export, and call type-specific setup.
* Setup is effectively the "start this obd" call.
*
* Return:
* * %0 on success
* * %negative on error
*/
int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
{
int err = 0;
ENTRY;
LASSERT(obd != NULL);
LASSERTF(obd == class_num2obd(obd->obd_minor),
"obd %px != obd_devs[%d] %px\n",
obd, obd->obd_minor, class_num2obd(obd->obd_minor));
LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
"obd %px obd_magic %08x != %08x\n",
obd, obd->obd_magic, OBD_DEVICE_MAGIC);
/* have we attached a type to this device? */
if (!test_bit(OBDF_ATTACHED, obd->obd_flags)) {
CERROR("Device %d not attached\n", obd->obd_minor);
RETURN(-ENODEV);
}
if (test_bit(OBDF_SET_UP, obd->obd_flags)) {
err = -EEXIST;
CERROR("%s: device %d already setup: rc = %d\n",
obd->obd_type->typ_name, obd->obd_minor, err);
RETURN(err);
}
/* is someone else setting us up right now? (attach inits spinlock) */
spin_lock(&obd->obd_dev_lock);
if (test_bit(OBDF_STARTING, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
err = -EEXIST;
CERROR("%s: device %d setup already in progress: rc = %d\n",
obd->obd_type->typ_name, obd->obd_minor, err);
RETURN(err);
}
/*
* just leave this on forever. I can't use OBDF_SET_UP here because
* other fns check that status, and we're not actually set up yet.
*/
set_bit(OBDF_STARTING, obd->obd_flags);
obd->obd_gen_hash = NULL;
spin_unlock(&obd->obd_dev_lock);
/* create an uuid-export lustre hash */
err = rhashtable_init(&obd->obd_uuid_hash, &uuid_hash_params);
if (err)
GOTO(err_starting, err);
#ifdef CONFIG_LUSTRE_FS_SERVER
/* create a nid-export lustre hash */
err = rhltable_init(&obd->obd_nid_hash, &nid_hash_params);
if (err)
GOTO(err_uuid_hash, err = -ENOMEM);
/* create a nid-stats lustre hash */
err = rhltable_init(&obd->obd_nid_stats_hash, &nid_stats_hash_params);
if (err)
GOTO(err_nid_hash, err = -ENOMEM);
/* create a client_generation-export lustre hash */
obd->obd_gen_hash = cfs_hash_create("UUID_HASH",
HASH_GEN_CUR_BITS,
HASH_GEN_MAX_BITS,
HASH_GEN_BKT_BITS, 0,
CFS_HASH_MIN_THETA,
CFS_HASH_MAX_THETA,
&gen_hash_ops, CFS_HASH_DEFAULT);
if (!obd->obd_gen_hash)
GOTO(err_nid_stats_hash, err = -ENOMEM);
#endif /* CONFIG_LUSTRE_FS_SERVER */
err = obd_setup(obd, lcfg);
if (err)
#ifdef CONFIG_LUSTRE_FS_SERVER
GOTO(err_gen_hash, err);
#else
GOTO(err_uuid_hash, err);
#endif /* ! CONFIG_LUSTRE_FS_SERVER */
set_bit(OBDF_SET_UP, obd->obd_flags);
spin_lock(&obd->obd_dev_lock);
/* cleanup drops this */
class_incref(obd, "setup", obd);
spin_unlock(&obd->obd_dev_lock);
CDEBUG(D_IOCTL, "finished setup of obd %s (uuid %s)\n",
obd->obd_name, obd->obd_uuid.uuid);
RETURN(0);
#ifdef CONFIG_LUSTRE_FS_SERVER
err_gen_hash:
if (obd->obd_gen_hash) {
cfs_hash_putref(obd->obd_gen_hash);
obd->obd_gen_hash = NULL;
}
err_nid_stats_hash:
rhltable_destroy(&obd->obd_nid_stats_hash);
err_nid_hash:
rhltable_destroy(&obd->obd_nid_hash);
#endif /* CONFIG_LUSTRE_FS_SERVER */
err_uuid_hash:
rhashtable_destroy(&obd->obd_uuid_hash);
err_starting:
clear_bit(OBDF_STARTING, obd->obd_flags);
CERROR("setup %s failed (%d)\n", obd->obd_name, err);
return err;
}
EXPORT_SYMBOL(class_setup);
/**
* class_detach() - detach obd device (set it inactive)
* @obd: pointer to obd device which is being detach (inactive)
*
* We have finished using this OBD and are ready to destroy it.
* There can be no more references to this obd.
*
* Return:
* * %0 on success
* * %negative on error
*/
int class_detach(struct obd_device *obd)
{
ENTRY;
if (test_bit(OBDF_SET_UP, obd->obd_flags)) {
CERROR("OBD device %d still set up\n", obd->obd_minor);
RETURN(-EBUSY);
}
spin_lock(&obd->obd_dev_lock);
if (!test_bit(OBDF_ATTACHED, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
CERROR("OBD device %d not attached\n", obd->obd_minor);
RETURN(-ENODEV);
}
clear_bit(OBDF_ATTACHED, obd->obd_flags);
/* cleanup in progress. we don't like to find this device after now */
class_unregister_device(obd);
spin_unlock(&obd->obd_dev_lock);
CDEBUG(D_IOCTL, "detach on obd %s (uuid %s)\n",
obd->obd_name, obd->obd_uuid.uuid);
class_decref(obd, "newdev", obd);
RETURN(0);
}
EXPORT_SYMBOL(class_detach);
/*
* Start shutting down the OBD. There may be in-progess ops when
* this is called. We tell them to start shutting down with a call
* to class_disconnect_exports().
*/
int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
{
int err = 0;
char *flag;
ENTRY;
CFS_RACE(OBD_FAIL_LDLM_RECOV_CLIENTS);
if (!test_bit(OBDF_SET_UP, obd->obd_flags)) {
CERROR("Device %d not setup\n", obd->obd_minor);
RETURN(-ENODEV);
}
spin_lock(&obd->obd_dev_lock);
if (test_bit(OBDF_STOPPING, obd->obd_flags)) {
spin_unlock(&obd->obd_dev_lock);
CERROR("OBD %d already stopping\n", obd->obd_minor);
RETURN(-ENODEV);
}
/* Leave this on forever */
set_bit(OBDF_STOPPING, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
/* wait for already-arrived-connections to finish. */
wait_var_event(&obd->obd_conn_inprogress,
atomic_read(&obd->obd_conn_inprogress) == 0);
smp_rmb();
if (lcfg->lcfg_bufcount >= 2 && LUSTRE_CFG_BUFLEN(lcfg, 1) > 0) {
for (flag = lustre_cfg_string(lcfg, 1); *flag != 0; flag++)
switch (*flag) {
case 'F':
set_bit(OBDF_FORCE, obd->obd_flags);
break;
case 'A':
LCONSOLE(D_WARNING, "Failing over %s\n",
obd->obd_name);
spin_lock(&obd->obd_dev_lock);
set_bit(OBDF_FAIL, obd->obd_flags);
#ifdef CONFIG_LUSTRE_FS_SERVER
obd->obd_no_transno = 1;
#endif
set_bit(OBDF_NO_RECOV, obd->obd_flags);
spin_unlock(&obd->obd_dev_lock);
if (obd->obd_type->typ_dt_ops->o_iocontrol) {
obd_iocontrol(OBD_IOC_SYNC,
obd->obd_self_export,
0, NULL, NULL);
}
break;
default:
CERROR("Unrecognised flag '%c'\n", *flag);
}
}
LASSERT(obd->obd_self_export);
CDEBUG(D_IOCTL, "%s: forcing exports to disconnect: %d/%d\n",
obd->obd_name, obd->obd_num_exports,
kref_read(&obd->obd_refcount) - 2);
dump_exports(obd, 0, D_HA);
class_disconnect_exports(obd);
/* Precleanup, we must make sure all exports get destroyed. */
err = obd_precleanup(obd);
if (err)
CERROR("Precleanup %s returned %d\n",
obd->obd_name, err);
/* destroy an uuid-export hash body */
rhashtable_free_and_destroy(&obd->obd_uuid_hash, obd_export_exit,
NULL);
#ifdef CONFIG_LUSTRE_FS_SERVER
/* destroy a nid-export hash body */
rhltable_free_and_destroy(&obd->obd_nid_hash, nid_export_exit, NULL);
/* destroy a nid-stats hash body */
rhltable_free_and_destroy(&obd->obd_nid_stats_hash, nid_stats_exit,
NULL);
/* destroy a client_generation-export hash body */
if (obd->obd_gen_hash) {
cfs_hash_putref(obd->obd_gen_hash);
obd->obd_gen_hash = NULL;
}
#endif /* CONFIG_LUSTRE_FS_SERVER */
class_decref(obd, "setup", obd);
clear_bit(OBDF_SET_UP, obd->obd_flags);
RETURN(0);
}
struct obd_device *class_incref(struct obd_device *obd,
const char *scope,
const void *source)
{
kref_get(&obd->obd_refcount);
CDEBUG(D_INFO, "incref %s (%p) now %d - %s\n", obd->obd_name, obd,
kref_read(&obd->obd_refcount), scope);
return obd;
}
EXPORT_SYMBOL(class_incref);
static void class_decref_free(struct kref *kref)
{
struct obd_device *obd;
struct obd_export *exp;
obd = container_of(kref, struct obd_device, obd_refcount);
LASSERT(!test_bit(OBDF_ATTACHED, obd->obd_flags));
/*
* All exports have been destroyed; there should
* be no more in-progress ops by this point.
*/
exp = obd->obd_self_export;
if (exp) {
exp->exp_flags |= exp_flags_from_obd(obd);
class_unlink_export(exp);
}
}
void class_decref(struct obd_device *obd, const char *scope, const void *source)
{
CDEBUG(D_INFO, "Decref %s (%p) now %d - %s\n", obd->obd_name, obd,
kref_read(&obd->obd_refcount), scope);
LASSERT(obd->obd_num_exports >= 0);
kref_put(&obd->obd_refcount, class_decref_free);
}
EXPORT_SYMBOL(class_decref);
/**
* class_add_conn() - Add server connection with client OBD
* @obd: pointer to obd device which adds connection
* @lcfg: pointer to lustre_cfg (holds parameter UUID)
*
* Client OBD types contact server OBD types using this NID list.
*
* Return:
* * %0 on success
* * %negative on error
*/
int class_add_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
{
struct obd_import *imp;
struct obd_uuid uuid;
int rc;
ENTRY;
if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
CERROR("invalid conn_uuid\n");
RETURN(-EINVAL);
}
if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME) &&
strcmp(obd->obd_type->typ_name, LUSTRE_OSP_NAME) &&
strcmp(obd->obd_type->typ_name, LUSTRE_LWP_NAME) &&
strcmp(obd->obd_type->typ_name, LUSTRE_MGC_NAME)) {
CERROR("can't add connection on non-client dev\n");
RETURN(-EINVAL);
}
imp = obd->u.cli.cl_import;
if (!imp) {
CERROR("try to add conn on immature client dev\n");
RETURN(-EINVAL);
}
obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
rc = obd_add_conn(imp, &uuid, lcfg->lcfg_num);
RETURN(rc);
}
EXPORT_SYMBOL(class_add_conn);
/* Remove a failover NID location. */
static int class_del_conn(struct obd_device *obd, struct lustre_cfg *lcfg)
{
struct obd_import *imp;
struct obd_uuid uuid;
int rc;
ENTRY;
if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1 ||
LUSTRE_CFG_BUFLEN(lcfg, 1) > sizeof(struct obd_uuid)) {
CERROR("invalid conn_uuid\n");
RETURN(-EINVAL);
}
if (strcmp(obd->obd_type->typ_name, LUSTRE_MDC_NAME) &&
strcmp(obd->obd_type->typ_name, LUSTRE_OSC_NAME)) {
CERROR("can't del connection on non-client dev\n");
RETURN(-EINVAL);
}
imp = obd->u.cli.cl_import;
if (!imp) {
CERROR("try to del conn on immature client dev\n");
RETURN(-EINVAL);
}
obd_str2uuid(&uuid, lustre_cfg_string(lcfg, 1));
rc = obd_del_conn(imp, &uuid);
RETURN(rc);
}
static LIST_HEAD(lustre_profile_list);
static DEFINE_SPINLOCK(lustre_profile_list_lock);
static struct lustre_profile *class_get_profile_nolock(const char *prof)
{
struct lustre_profile *lprof;
ENTRY;
list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
if (strcmp(lprof->lp_profile, prof) == 0) {
lprof->lp_refs++;
RETURN(lprof);
}
}
RETURN(NULL);
}
struct lustre_profile *class_get_profile(const char *prof)
{
struct lustre_profile *lprof;
ENTRY;
spin_lock(&lustre_profile_list_lock);
lprof = class_get_profile_nolock(prof);
spin_unlock(&lustre_profile_list_lock);
RETURN(lprof);
}
EXPORT_SYMBOL(class_get_profile);
/*
* Create a named "profile".
* This defines the MDC and OSC names to use for a client.
* This also is used to define the LOV to be used by a MDT.
*/
static int class_add_profile(int proflen, char *prof, int osclen, char *osc,
int mdclen, char *mdc)
{
struct lustre_profile *lprof;
int err = 0;
ENTRY;
CDEBUG(D_CONFIG, "Add profile %s\n", prof);
OBD_ALLOC(lprof, sizeof(*lprof));
if (!lprof)
RETURN(-ENOMEM);
INIT_LIST_HEAD(&lprof->lp_list);
LASSERT(proflen == (strlen(prof) + 1));
OBD_ALLOC(lprof->lp_profile, proflen);
if (!lprof->lp_profile)
GOTO(out, err = -ENOMEM);
memcpy(lprof->lp_profile, prof, proflen);
LASSERT(osclen == (strlen(osc) + 1));
OBD_ALLOC(lprof->lp_dt, osclen);
if (!lprof->lp_dt)
GOTO(out, err = -ENOMEM);
memcpy(lprof->lp_dt, osc, osclen);
if (mdclen > 0) {
LASSERT(mdclen == (strlen(mdc) + 1));
OBD_ALLOC(lprof->lp_md, mdclen);
if (!lprof->lp_md)
GOTO(out, err = -ENOMEM);
memcpy(lprof->lp_md, mdc, mdclen);
}
spin_lock(&lustre_profile_list_lock);
lprof->lp_refs = 1;
lprof->lp_list_deleted = false;
list_add(&lprof->lp_list, &lustre_profile_list);
spin_unlock(&lustre_profile_list_lock);
RETURN(err);
out:
OBD_FREE(lprof->lp_md, mdclen);
OBD_FREE(lprof->lp_dt, osclen);
OBD_FREE(lprof->lp_profile, proflen);
OBD_FREE(lprof, sizeof(*lprof));
RETURN(err);
}
void class_del_profile(const char *prof)
{
struct lustre_profile *lprof;
ENTRY;
CDEBUG(D_CONFIG, "Del profile %s\n", prof);
spin_lock(&lustre_profile_list_lock);
lprof = class_get_profile_nolock(prof);
if (lprof) {
/* because get profile increments the ref counter */
lprof->lp_refs--;
list_del(&lprof->lp_list);
lprof->lp_list_deleted = true;
spin_unlock(&lustre_profile_list_lock);
class_put_profile(lprof);
} else {
spin_unlock(&lustre_profile_list_lock);
}
EXIT;
}
EXPORT_SYMBOL(class_del_profile);
void class_put_profile(struct lustre_profile *lprof)
{
spin_lock(&lustre_profile_list_lock);
if ((--lprof->lp_refs) > 0) {
LASSERT(lprof->lp_refs > 0);
spin_unlock(&lustre_profile_list_lock);
return;
}
spin_unlock(&lustre_profile_list_lock);
/* confirm not a negative number */
LASSERT(lprof->lp_refs == 0);
/*
* At least one class_del_profile/profiles must be called
* on the target profile or lustre_profile_list will corrupt
*/
LASSERT(lprof->lp_list_deleted);
OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
OBD_FREE(lprof->lp_dt, strlen(lprof->lp_dt) + 1);
OBD_FREE(lprof->lp_md, strlen(lprof->lp_md) + 1);
OBD_FREE(lprof, sizeof(*lprof));
}
EXPORT_SYMBOL(class_put_profile);
/* COMPAT_146 */
void class_del_profiles(void)
{
struct lustre_profile *lprof, *n;
ENTRY;
spin_lock(&lustre_profile_list_lock);
list_for_each_entry_safe(lprof, n, &lustre_profile_list, lp_list) {
list_del(&lprof->lp_list);
lprof->lp_list_deleted = true;
spin_unlock(&lustre_profile_list_lock);
class_put_profile(lprof);
spin_lock(&lustre_profile_list_lock);
}
spin_unlock(&lustre_profile_list_lock);
EXIT;
}
EXPORT_SYMBOL(class_del_profiles);
/*
* We can't call lquota_process_config directly because
* it lives in a module that must be loaded after this one.
*/
#ifdef CONFIG_LUSTRE_FS_SERVER
static int (*quota_process_config)(struct lustre_cfg *lcfg) = NULL;
#endif /* CONFIG_LUSTRE_FS_SERVER */
/**
* lustre_cfg_rename() - Rename proc parameter in @cfg with a new name @new_name
* @cfg: config structure which contains the proc parameter
* @new_name: new name of the proc parameter
*
* Return:
* * %valid pointer to the newly-allocated config structure which contains the
* renamed proc parameter
* * %-EINVAL if @cfg/@new_name is NULL, or @cfg does not contain proc parameter
* * %-ENOMEM if memory allocation failure occurs
*/
struct lustre_cfg *lustre_cfg_rename(struct lustre_cfg *cfg,
const char *new_name)
{
struct lustre_cfg_bufs *bufs = NULL;
struct lustre_cfg *new_cfg = NULL;
char *param = NULL;
char *new_param = NULL;
char *value = NULL;
int name_len = 0;
int new_len = 0;
ENTRY;
if (!cfg || !new_name)
GOTO(out_nocfg, new_cfg = ERR_PTR(-EINVAL));
param = lustre_cfg_string(cfg, 1);
if (!param)
GOTO(out_nocfg, new_cfg = ERR_PTR(-EINVAL));
value = strchr(param, '=');
if (value)
name_len = value - param;
else
name_len = strlen(param);
new_len = LUSTRE_CFG_BUFLEN(cfg, 1) + strlen(new_name) - name_len;
OBD_ALLOC(new_param, new_len);
if (!new_param)
GOTO(out_nocfg, new_cfg = ERR_PTR(-ENOMEM));
strscpy(new_param, new_name, new_len);
if (value)
strcat(new_param, value);
OBD_ALLOC_PTR(bufs);
if (!bufs)
GOTO(out_free_param, new_cfg = ERR_PTR(-ENOMEM));
lustre_cfg_bufs_reset(bufs, NULL);
lustre_cfg_bufs_init(bufs, cfg);
lustre_cfg_bufs_set_string(bufs, 1, new_param);
OBD_ALLOC(new_cfg, lustre_cfg_len(bufs->lcfg_bufcount,
bufs->lcfg_buflen));
if (!new_cfg)
GOTO(out_free_buf, new_cfg = ERR_PTR(-ENOMEM));
lustre_cfg_init(new_cfg, cfg->lcfg_command, bufs);
new_cfg->lcfg_num = cfg->lcfg_num;
new_cfg->lcfg_flags = cfg->lcfg_flags;
new_cfg->lcfg_nid = cfg->lcfg_nid;
new_cfg->lcfg_nal = cfg->lcfg_nal;
out_free_buf:
OBD_FREE_PTR(bufs);
out_free_param:
OBD_FREE(new_param, new_len);
out_nocfg:
RETURN(new_cfg);
}
EXPORT_SYMBOL(lustre_cfg_rename);
static ssize_t process_param2_config(struct lustre_cfg *lcfg)
{
char *param = lustre_cfg_string(lcfg, 1);
char *upcall = lustre_cfg_string(lcfg, 2);
struct kobject *kobj = NULL;
const char *subsys = param;
char *newparam = NULL;
char *argv[] = {
[0] = "/usr/sbin/lctl",
[1] = "set_param",
[2] = param,
[3] = NULL
};
ktime_t start;
ktime_t end;
size_t len;
int rc;
ENTRY;
print_lustre_cfg(lcfg);
len = strcspn(param, ".=");
if (!len)
RETURN(-EINVAL);
/* If we find '=' then its the top level sysfs directory */
if (param[len] == '=')
RETURN(class_set_global(param));
subsys = kstrndup(param, len, GFP_KERNEL);
if (!subsys)
RETURN(-ENOMEM);
kobj = kset_find_obj(lustre_kset, subsys);
kfree(subsys);
if (kobj) {
char *value = param;
char *envp[4];
int i;
param = strsep(&value, "=");
envp[0] = kasprintf(GFP_KERNEL, "PARAM=%s", param);
envp[1] = kasprintf(GFP_KERNEL, "SETTING=%s", value);
envp[2] = kasprintf(GFP_KERNEL, "TIME=%lld",
ktime_get_real_seconds());
envp[3] = NULL;
rc = kobject_uevent_env(kobj, KOBJ_CHANGE, envp);
for (i = 0; i < ARRAY_SIZE(envp); i++)
kfree(envp[i]);
kobject_put(kobj);
RETURN(rc);
}
/* Add upcall processing here. Now only lctl is supported */
if (strcmp(upcall, LCTL_UPCALL) != 0) {
CERROR("Unsupported upcall %s\n", upcall);
RETURN(-EINVAL);
}
/* root_squash and nosquash_nids settings must be applied to
* global subsystem (*.) so that it is taken into account by
* both client and server sides. So do the equivalent of a
* 's / mdt. / *. /'.
*/
if ((strstr(param, PARAM_NOSQUASHNIDS) ||
strstr(param, PARAM_ROOTSQUASH)) &&
(param[0] != '*' || param[1] != '.')) {
newparam = kmalloc(strlen(param) + 1, GFP_NOFS);
if (!newparam)
RETURN(-ENOMEM);
snprintf(newparam, strlen(param) + 1, "*%s", param + len);
argv[2] = (char *)newparam;
}
start = ktime_get();
rc = call_usermodehelper(argv[0], argv, NULL, UMH_WAIT_PROC);
end = ktime_get();
if (rc < 0) {
CERROR("lctl: error invoking upcall %s %s %s: rc = %d; "
"time %ldus\n", argv[0], argv[1], argv[2], rc,
(long)ktime_us_delta(end, start));
} else {
CDEBUG(D_HA, "lctl: invoked upcall %s %s %s, time %ldus\n",
argv[0], argv[1], argv[2],
(long)ktime_us_delta(end, start));
rc = 0;
}
kfree(newparam);
RETURN(rc);
}
#ifdef CONFIG_LUSTRE_FS_SERVER
void lustre_register_quota_process_config(int (*qpc)(struct lustre_cfg *lcfg))
{
quota_process_config = qpc;
}
EXPORT_SYMBOL(lustre_register_quota_process_config);
#endif /* CONFIG_LUSTRE_FS_SERVER */
/**
* class_process_config() - Process configuration commands given in @lcfg
* @lcfg: pointer to lustre_cfg (holds parameters like: device name, type, UUID)
* @kobj: only for LCFG_PARAM commands(modify a device-specific param via sysfs)
*
* Process configuration commands given in lustre_cfg form.
* These may come from direct calls (e.g. class_manual_cleanup)
* or processing the config llog, or ioctl from lctl.
*
* Return:
* * %0 on success
* * %negative on error
*/
int class_process_config(struct lustre_cfg *lcfg, struct kobject *kobj)
{
struct obd_device *obd;
struct lnet_nid nid;
int err;
LASSERT(lcfg && !IS_ERR(lcfg));
CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
/* Commands that don't need a device */
switch (lcfg->lcfg_command) {
case LCFG_ATTACH: {
obd = class_attach_name(lustre_cfg_string(lcfg, 1),
lustre_cfg_string(lcfg, 0),
lustre_cfg_string(lcfg, 2));
err = PTR_ERR_OR_ZERO(obd);
GOTO(out, err);
}
case LCFG_ADD_UUID: {
CDEBUG(D_IOCTL,
"adding mapping from uuid %s to nid %#llx (%s)\n",
lustre_cfg_string(lcfg, 1), lcfg->lcfg_nid,
libcfs_nid2str(lcfg->lcfg_nid));
err = 0;
if (lcfg->lcfg_nid) {
lnet_nid4_to_nid(lcfg->lcfg_nid, &nid);
} else {
char *nidstr = lustre_cfg_string(lcfg, 2);
if (nidstr)
err = libcfs_strnid(&nid, nidstr);
else
err = -EINVAL;
}
if (!err)
err = class_add_uuid(lustre_cfg_string(lcfg, 1), &nid);
GOTO(out, err);
}
case LCFG_DEL_UUID: {
CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
(lcfg->lcfg_bufcount < 2 || LUSTRE_CFG_BUFLEN(lcfg, 1) ==
0) ? "<all uuids>" : lustre_cfg_string(lcfg, 1));
err = class_del_uuid(lustre_cfg_string(lcfg, 1));
GOTO(out, err);
}
case LCFG_MOUNTOPT: {
CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
lustre_cfg_string(lcfg, 1),
lustre_cfg_string(lcfg, 2),
lustre_cfg_string(lcfg, 3));
/*
* set these mount options somewhere, so ll_fill_super
* can find them.
*/
err = class_add_profile(LUSTRE_CFG_BUFLEN(lcfg, 1),
lustre_cfg_string(lcfg, 1),
LUSTRE_CFG_BUFLEN(lcfg, 2),
lustre_cfg_string(lcfg, 2),
LUSTRE_CFG_BUFLEN(lcfg, 3),
lustre_cfg_string(lcfg, 3));
GOTO(out, err);
}
case LCFG_DEL_MOUNTOPT: {
CDEBUG(D_IOCTL, "mountopt: profile %s\n",
lustre_cfg_string(lcfg, 1));
class_del_profile(lustre_cfg_string(lcfg, 1));
GOTO(out, err = 0);
}
case LCFG_SET_TIMEOUT: {
CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
obd_timeout, lcfg->lcfg_num);
obd_timeout = max(lcfg->lcfg_num, 1U);
ping_interval = max(obd_timeout / 4, 1U);
obd_timeout_set = 1;
GOTO(out, err = 0);
}
case LCFG_SET_LDLM_TIMEOUT: {
CDEBUG(D_IOCTL, "changing lustre ldlm_timeout from %d to %d\n",
ldlm_timeout, lcfg->lcfg_num);
ldlm_timeout = max(lcfg->lcfg_num, 1U);
if (ldlm_timeout >= obd_timeout)
ldlm_timeout = max(obd_timeout / 3, 1U);
ldlm_timeout_set = 1;
GOTO(out, err = 0);
}
case LCFG_SET_UPCALL: {
LCONSOLE_ERROR("recovery upcall is deprecated\n");
/* COMPAT_146 Don't fail on old configs */
GOTO(out, err = 0);
}
case LCFG_MARKER: {
struct cfg_marker *marker;
marker = lustre_cfg_buf(lcfg, 1);
CDEBUG(D_IOCTL, "marker %d (%#x) %.16s %s\n", marker->cm_step,
marker->cm_flags, marker->cm_tgtname,
marker->cm_comment);
GOTO(out, err = 0);
}
case LCFG_PARAM: {
char *tmp;
/* llite has no OBD */
if (class_match_param(lustre_cfg_string(lcfg, 1),
PARAM_LLITE, NULL) == 0) {
ssize_t count;
LASSERT(kobj);
count = class_modify_config(lcfg, PARAM_LLITE, kobj);
err = count < 0 ? count : 0;
GOTO(out, err);
} else if ((class_match_param(lustre_cfg_string(lcfg, 1),
PARAM_SYS, &tmp) == 0)) {
/* Global param settings */
err = class_set_global(tmp);
/*
* Client or server should not fail to mount if
* it hits an unknown configuration parameter.
*/
if (err < 0)
CWARN("Ignoring unknown param %s\n", tmp);
GOTO(out, err = 0);
#ifdef CONFIG_LUSTRE_FS_SERVER
} else if ((class_match_param(lustre_cfg_string(lcfg, 1),
PARAM_QUOTA, &tmp) == 0) &&
quota_process_config) {
err = (*quota_process_config)(lcfg);
GOTO(out, err);
#endif /* CONFIG_LUSTRE_FS_SERVER */
}
break;
}
case LCFG_SET_PARAM: {
err = process_param2_config(lcfg);
GOTO(out, err = 0);
}
}
/* Commands that require a device */
obd = class_name2obd(lustre_cfg_string(lcfg, 0));
if (!obd) {
if (!LUSTRE_CFG_BUFLEN(lcfg, 0))
CERROR("this lcfg command requires a device name\n");
else
CERROR("no device for: %s\n",
lustre_cfg_string(lcfg, 0));
GOTO(out, err = -EINVAL);
}
switch(lcfg->lcfg_command) {
case LCFG_SETUP: {
err = class_setup(obd, lcfg);
GOTO(out, err);
}
case LCFG_DETACH: {
err = class_detach(obd);
GOTO(out, err = 0);
}
case LCFG_CLEANUP: {
err = class_cleanup(obd, lcfg);
GOTO(out, err = 0);
}
case LCFG_ADD_CONN: {
err = class_add_conn(obd, lcfg);
GOTO(out, err = 0);
}
case LCFG_DEL_CONN: {
err = class_del_conn(obd, lcfg);
GOTO(out, err = 0);
}
case LCFG_POOL_NEW: {
err = obd_pool_new(obd, lustre_cfg_string(lcfg, 2));
GOTO(out, err = 0);
}
case LCFG_POOL_ADD: {
err = obd_pool_add(obd, lustre_cfg_string(lcfg, 2),
lustre_cfg_string(lcfg, 3));
GOTO(out, err = 0);
}
case LCFG_POOL_REM: {
err = obd_pool_rem(obd, lustre_cfg_string(lcfg, 2),
lustre_cfg_string(lcfg, 3));
GOTO(out, err = 0);
}
case LCFG_POOL_DEL: {
err = obd_pool_del(obd, lustre_cfg_string(lcfg, 2));
GOTO(out, err = 0);
}
/*
* Process config log ADD_MDC record twice to add MDC also to LOV
* for Data-on-MDT:
*
* add 0:lustre-clilmv 1:lustre-MDT0000_UUID 2:0 3:1
* 4:lustre-MDT0000-mdc_UUID
*/
case LCFG_ADD_MDC: {
struct obd_device *lov_obd;
char *clilmv;
err = obd_process_config(obd, sizeof(*lcfg), lcfg);
if (err)
GOTO(out, err);
/* make sure this is client LMV log entry */
clilmv = strstr(lustre_cfg_string(lcfg, 0), "clilmv");
if (!clilmv)
GOTO(out, err);
/*
* replace 'lmv' with 'lov' name to address LOV device and
* process llog record to add MDC there.
*/
clilmv[4] = 'o';
lov_obd = class_name2obd(lustre_cfg_string(lcfg, 0));
if (lov_obd) {
err = obd_process_config(lov_obd, sizeof(*lcfg), lcfg);
} else {
err = -ENOENT;
CERROR("%s: Cannot find LOV by %s name, rc = %d\n",
obd->obd_name, lustre_cfg_string(lcfg, 0), err);
}
/* restore 'lmv' name */
clilmv[4] = 'm';
GOTO(out, err);
}
default: {
err = obd_process_config(obd, sizeof(*lcfg), lcfg);
GOTO(out, err);
}
}
EXIT;
out:
if ((err < 0) && !(lcfg->lcfg_command & LCFG_REQUIRED)) {
CWARN("Ignoring error %d on optional command %#x\n", err,
lcfg->lcfg_command);
err = 0;
}
return err;
}
EXPORT_SYMBOL(class_process_config);
ssize_t class_modify_config(struct lustre_cfg *lcfg, const char *prefix,
struct kobject *kobj)
{
const struct kobj_type *typ;
ssize_t count = 0;
int i;
if (lcfg->lcfg_command != LCFG_PARAM) {
CERROR("Unknown command: %d\n", lcfg->lcfg_command);
return -EINVAL;
}
typ = get_ktype(kobj);
if (!typ || !typ->default_groups)
return -ENODEV;
print_lustre_cfg(lcfg);
/*
* e.g. tunefs.lustre --param mdt.group_upcall=foo /r/tmp/lustre-mdt
* or lctl conf_param lustre-MDT0000.mdt.group_upcall=bar
* or lctl conf_param lustre-OST0000.osc.max_dirty_mb=36
*/
for (i = 1; i < lcfg->lcfg_bufcount; i++) {
struct attribute *attr = NULL;
size_t keylen;
char *value;
char *key;
key = lustre_cfg_buf(lcfg, i);
/* Strip off prefix */
if (class_match_param(key, prefix, &key))
/*
* If the prefix doesn't match, return error so we
* can pass it down the stack
*/
return -EINVAL;
value = strchr(key, '=');
if (!value || *(value + 1) == 0) {
CERROR("%s: can't parse param '%s' (missing '=')\n",
lustre_cfg_string(lcfg, 0),
lustre_cfg_string(lcfg, i));
/* continue parsing other params */
continue;
}
keylen = value - key;
value++;
attr = get_attr_starts_with(typ, key, keylen);
if (!attr) {
char *envp[4], *param, *path;
path = kobject_get_path(kobj, GFP_KERNEL);
if (!path)
return -EINVAL;
/* convert sysfs path to uevent format */
param = path;
while ((param = strchr(param, '/')) != NULL)
*param = '.';
param = strstr(path, "fs.lustre.") + 10;
envp[0] = kasprintf(GFP_KERNEL, "PARAM=%s.%.*s",
param, (int) keylen, key);
envp[1] = kasprintf(GFP_KERNEL, "SETTING=%s", value);
envp[2] = kasprintf(GFP_KERNEL, "TIME=%lld",
ktime_get_real_seconds());
envp[3] = NULL;
if (kobject_uevent_env(kobj, KOBJ_CHANGE, envp)) {
CERROR("%s: failed to send uevent %s\n",
kobject_name(kobj), key);
}
for (i = 0; i < ARRAY_SIZE(envp); i++)
kfree(envp[i]);
kfree(path);
} else {
count += lustre_attr_store(kobj, attr, value,
strlen(value));
}
}
return count;
}
EXPORT_SYMBOL(class_modify_config);
/**
* lustre_cfg_rec_new() - Supplemental functions for config logs
* @cmd: lcfg_command_type (eg LCFG_ATTACH)
* @bufs: buffer supporting arguments for @cmd
*
* Supplemental functions for config logs, it allocates lustre_cfg
* buffers plus initialized llog record header at the beginning.
*
* Return:
* * %0 on success
* * %negative on failure
*/
struct llog_cfg_rec *lustre_cfg_rec_new(int cmd, struct lustre_cfg_bufs *bufs)
{
struct llog_cfg_rec *lcr;
int reclen;
ENTRY;
reclen = lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen);
reclen = llog_data_len(reclen) + sizeof(struct llog_rec_hdr) +
sizeof(struct llog_rec_tail);
OBD_ALLOC(lcr, reclen);
if (!lcr)
RETURN(NULL);
lustre_cfg_init(&lcr->lcr_cfg, cmd, bufs);
lcr->lcr_hdr.lrh_len = reclen;
lcr->lcr_hdr.lrh_type = OBD_CFG_REC;
RETURN(lcr);
}
EXPORT_SYMBOL(lustre_cfg_rec_new);
void lustre_cfg_rec_free(struct llog_cfg_rec *lcr)
{
ENTRY;
OBD_FREE(lcr, lcr->lcr_hdr.lrh_len);
EXIT;
}
EXPORT_SYMBOL(lustre_cfg_rec_free);
/**
* class_config_llog_handler() - Parse a configuration llog
* @env: current lustre environment (not used)
* @handle: llog handle
* @rec: record header
* @data: Passed as data param to class_config_parse_llog
*
* Parse a configuration llog, doing various manipulations on them
* for various reasons, (modifications for compatibility, skip obsolete
* records, change uuids, etc), then class_process_config() resulting
* net records.
*
* Return:
* * %0 on success
* * %negative on failure
*/
int class_config_llog_handler(const struct lu_env *env,
struct llog_handle *handle,
struct llog_rec_hdr *rec, void *data)
{
struct config_llog_instance *cfg = data;
int rc = 0;
ENTRY;
/* class_config_dump_handler(handle, rec, data); */
switch (rec->lrh_type) {
case OBD_CFG_REC: {
struct lustre_cfg *lcfg = REC_DATA(rec);
struct lustre_cfg *lcfg_new;
struct lustre_cfg_bufs bufs;
char *inst_name = NULL;
int inst_len = 0;
int swab = 0;
if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
lustre_swab_lustre_cfg(lcfg);
swab = 1;
}
rc = lustre_cfg_sanity_check(lcfg, REC_DATA_LEN(rec));
if (rc)
GOTO(out, rc);
/* Figure out config state info */
if (lcfg->lcfg_command == LCFG_MARKER) {
struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
lustre_swab_cfg_marker(marker, swab,
LUSTRE_CFG_BUFLEN(lcfg, 1));
CDEBUG(D_CONFIG, "Marker, inst_flg=%#x mark_flg=%#x\n",
cfg->cfg_flags, marker->cm_flags);
if (marker->cm_flags & CM_START) {
/* all previous flags off */
cfg->cfg_flags = CFG_F_MARKER;
server_name2index(marker->cm_tgtname,
&cfg->cfg_lwp_idx, NULL);
if (marker->cm_flags & CM_SKIP) {
cfg->cfg_flags |= CFG_F_SKIP;
CDEBUG(D_CONFIG, "SKIP #%d\n",
marker->cm_step);
} else if ((marker->cm_flags & CM_EXCLUDE) ||
(cfg->cfg_sb &&
lustre_check_exclusion(cfg->cfg_sb,
marker->cm_tgtname))) {
cfg->cfg_flags |= CFG_F_EXCLUDE;
CDEBUG(D_CONFIG, "EXCLUDE %d\n",
marker->cm_step);
}
} else if (marker->cm_flags & CM_END) {
cfg->cfg_flags = 0;
}
}
/*
* A config command without a start marker before it is
* illegal
*/
if (!(cfg->cfg_flags & CFG_F_MARKER) &&
(lcfg->lcfg_command != LCFG_MARKER)) {
CWARN("Skip config outside markers, (inst: %016lx, uuid: %s, flags: %#x)\n",
cfg->cfg_instance,
cfg->cfg_uuid.uuid, cfg->cfg_flags);
cfg->cfg_flags |= CFG_F_SKIP;
}
if (cfg->cfg_flags & CFG_F_SKIP) {
CDEBUG(D_CONFIG, "skipping %#x\n",
cfg->cfg_flags);
rc = 0;
/* No processing! */
break;
}
/*
* For interoperability between 1.8 and 2.0,
* rename "mds" OBD device type to "mdt".
*/
{
char *typename = lustre_cfg_string(lcfg, 1);
char *index = lustre_cfg_string(lcfg, 2);
if ((lcfg->lcfg_command == LCFG_ATTACH && typename &&
strcmp(typename, "mds") == 0)) {
CWARN("For 1.8 interoperability, rename obd "
"type from mds to mdt\n");
typename[2] = 't';
}
if ((lcfg->lcfg_command == LCFG_SETUP && index &&
strcmp(index, "type") == 0)) {
CDEBUG(D_INFO, "For 1.8 interoperability, "
"set this index to '0'\n");
index[0] = '0';
index[1] = 0;
}
}
#ifdef CONFIG_LUSTRE_FS_SERVER
/* newer MDS replaces LOV/OSC with LOD/OSP */
if ((lcfg->lcfg_command == LCFG_ATTACH ||
lcfg->lcfg_command == LCFG_SET_PARAM ||
lcfg->lcfg_command == LCFG_PARAM) &&
cfg->cfg_sb && IS_MDT(s2lsi(cfg->cfg_sb))) {
char *typename = lustre_cfg_string(lcfg, 1);
if (typename &&
strcmp(typename, LUSTRE_LOV_NAME) == 0) {
CDEBUG(D_CONFIG,
"For 2.x interoperability, rename obd "
"type from lov to lod (%s)\n",
s2lsi(cfg->cfg_sb)->lsi_svname);
strcpy(typename, LUSTRE_LOD_NAME);
}
if (typename &&
strcmp(typename, LUSTRE_OSC_NAME) == 0) {
CDEBUG(D_CONFIG,
"For 2.x interoperability, rename obd "
"type from osc to osp (%s)\n",
s2lsi(cfg->cfg_sb)->lsi_svname);
strcpy(typename, LUSTRE_OSP_NAME);
}
}
#endif /* CONFIG_LUSTRE_FS_SERVER */
if (cfg->cfg_flags & CFG_F_EXCLUDE) {
CDEBUG(D_CONFIG, "cmd: %x marked EXCLUDED\n",
lcfg->lcfg_command);
if (lcfg->lcfg_command == LCFG_LOV_ADD_OBD)
/* Add inactive instead */
lcfg->lcfg_command = LCFG_LOV_ADD_INA;
}
lustre_cfg_bufs_reset(&bufs, NULL);
lustre_cfg_bufs_init(&bufs, lcfg);
if (cfg->cfg_instance &&
lcfg->lcfg_command != LCFG_SPTLRPC_CONF &&
LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
inst_len = LUSTRE_CFG_BUFLEN(lcfg, 0) +
LUSTRE_MAXINSTANCE + 4;
OBD_ALLOC(inst_name, inst_len);
if (!inst_name)
GOTO(out, rc = -ENOMEM);
snprintf(inst_name, inst_len, "%s-%016lx",
lustre_cfg_string(lcfg, 0),
cfg->cfg_instance);
lustre_cfg_bufs_set_string(&bufs, 0, inst_name);
CDEBUG(D_CONFIG, "cmd %x, instance name: %s\n",
lcfg->lcfg_command, inst_name);
}
/* override llog UUID for clients, to insure they are unique */
if (cfg->cfg_instance && lcfg->lcfg_command == LCFG_ATTACH)
lustre_cfg_bufs_set_string(&bufs, 2,
cfg->cfg_uuid.uuid);
/*
* sptlrpc config record, we expect 2 data segments:
* [0]: fs_name/target_name,
* [1]: rule string
* moving them to index [1] and [2], and insert MGC's
* obdname at index [0].
*/
if (cfg->cfg_instance &&
lcfg->lcfg_command == LCFG_SPTLRPC_CONF) {
/* After ASLR changes cfg_instance this needs fixing */
/* "obd" is set in config_log_find_or_add() */
struct obd_device *obd = (void *)cfg->cfg_instance;
lustre_cfg_bufs_set(&bufs, 2, bufs.lcfg_buf[1],
bufs.lcfg_buflen[1]);
lustre_cfg_bufs_set(&bufs, 1, bufs.lcfg_buf[0],
bufs.lcfg_buflen[0]);
lustre_cfg_bufs_set_string(&bufs, 0,
obd->obd_name);
}
/*
* Add net info to setup command
* if given on command line.
* So config log will be:
* [0]: client name
* [1]: client UUID
* [2]: server UUID
* [3]: inactive-on-startup
* [4]: restrictive net
*/
if (cfg && cfg->cfg_sb && s2lsi(cfg->cfg_sb)) {
struct lustre_sb_info *lsi = s2lsi(cfg->cfg_sb);
char *nidnet = lsi->lsi_lmd->lmd_nidnet;
if (lcfg->lcfg_command == LCFG_SETUP &&
lcfg->lcfg_bufcount != 2 && nidnet) {
CDEBUG(D_CONFIG,
"Adding net %s info to setup command for client %s\n",
nidnet, lustre_cfg_string(lcfg, 0));
lustre_cfg_bufs_set_string(&bufs, 4, nidnet);
}
}
OBD_ALLOC(lcfg_new, lustre_cfg_len(bufs.lcfg_bufcount,
bufs.lcfg_buflen));
if (!lcfg_new)
GOTO(out_inst, rc = -ENOMEM);
lustre_cfg_init(lcfg_new, lcfg->lcfg_command, &bufs);
lcfg_new->lcfg_num = lcfg->lcfg_num;
lcfg_new->lcfg_flags = lcfg->lcfg_flags;
/*
* XXX Hack to try to remain binary compatible with
* pre-newconfig logs
*/
if (lcfg->lcfg_nal != 0 && /* pre-newconfig log? */
(lcfg->lcfg_nid >> 32) == 0) {
__u32 addr = (__u32)(lcfg->lcfg_nid & 0xffffffff);
lcfg_new->lcfg_nid =
LNET_MKNID(LNET_MKNET(lcfg->lcfg_nal, 0), addr);
CWARN("Converted pre-newconfig NAL %d NID %x to %s\n",
lcfg->lcfg_nal, addr,
libcfs_nid2str(lcfg_new->lcfg_nid));
} else {
lcfg_new->lcfg_nid = lcfg->lcfg_nid;
}
lcfg_new->lcfg_nal = 0; /* illegal value for obsolete field */
rc = class_process_config(lcfg_new, cfg->cfg_kobj);
if (rc && lcfg_new->lcfg_command == LCFG_SETUP) {
lcfg_new->lcfg_command = LCFG_DETACH;
class_process_config(lcfg_new, NULL);
}
OBD_FREE(lcfg_new, lustre_cfg_len(lcfg_new->lcfg_bufcount,
lcfg_new->lcfg_buflens));
out_inst:
OBD_FREE(inst_name, inst_len);
break;
}
default:
CERROR("Unknown llog record type %#x encountered\n",
rec->lrh_type);
break;
}
out:
if (rc) {
CERROR("%s: cfg command failed: rc = %d\n",
handle->lgh_ctxt->loc_obd->obd_name, rc);
class_config_dump_handler(NULL, handle, rec, data);
}
RETURN(rc);
}
EXPORT_SYMBOL(class_config_llog_handler);
int class_config_parse_llog(const struct lu_env *env, struct llog_ctxt *ctxt,
char *name, struct config_llog_instance *cfg)
{
struct llog_process_cat_data cd = {
.lpcd_first_idx = 0,
.lpcd_read_mode = LLOG_READ_MODE_NORMAL,
};
struct llog_handle *llh;
llog_cb_t callback;
int rc;
ENTRY;
CDEBUG(D_INFO, "looking up llog %s\n", name);
rc = llog_open(env, ctxt, &llh, NULL, name, LLOG_OPEN_EXISTS);
if (rc)
RETURN(rc);
rc = llog_init_handle(env, llh, LLOG_F_IS_PLAIN, NULL);
if (rc)
GOTO(parse_out, rc);
/* continue processing from where we last stopped to end-of-log */
if (cfg) {
cd.lpcd_first_idx = cfg->cfg_last_idx;
callback = cfg->cfg_callback;
LASSERT(callback != NULL);
} else {
callback = class_config_llog_handler;
}
cd.lpcd_last_idx = 0;
rc = llog_process(env, llh, callback, cfg, &cd);
CDEBUG(D_CONFIG, "Processed log %s gen %d-%d (rc=%d)\n", name,
cd.lpcd_first_idx + 1, cd.lpcd_last_idx, rc);
if (cfg)
cfg->cfg_last_idx = cd.lpcd_last_idx;
parse_out:
llog_close(env, llh);
RETURN(rc);
}
EXPORT_SYMBOL(class_config_parse_llog);
#ifdef CONFIG_LUSTRE_FS_SERVER
/*
* Get marker cfg_flag
*/
void llog_get_marker_cfg_flags(struct llog_rec_hdr *rec,
unsigned int *cfg_flags)
{
struct lustre_cfg *lcfg = (struct lustre_cfg *)(rec + 1);
struct cfg_marker *marker;
if (lcfg->lcfg_command == LCFG_MARKER) {
marker = lustre_cfg_buf(lcfg, 1);
if (marker->cm_flags & CM_START) {
*cfg_flags = CFG_F_MARKER;
if (marker->cm_flags & CM_SKIP)
*cfg_flags = CFG_F_SKIP;
} else if (marker->cm_flags & CM_END) {
*cfg_flags = 0;
}
CDEBUG(D_INFO, "index=%d, cm_flags=%#08x cfg_flags=%#08x\n",
rec->lrh_index, marker->cm_flags, *cfg_flags);
}
}
/*
* Parse config record and output dump in supplied buffer.
*
* This is separated from class_config_dump_handler() to use
* for ioctl needs as well
*
* Sample Output:
* - { index: 4, event: attach, device: lustrewt-clilov, type: lov,
* UUID: lustrewt-clilov_UUID }
*/
int class_config_yaml_output(struct llog_rec_hdr *rec, char *buf, int size,
unsigned int *cfg_flags, bool raw)
{
struct lustre_cfg *lcfg = REC_DATA(rec);
char *ptr = buf;
char *end = buf + size;
int rc = 0, i;
struct lcfg_type_data *ldata;
LASSERT(rec->lrh_type == OBD_CFG_REC);
if (ptr >= end)
goto out_overflow;
if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION))
lustre_swab_lustre_cfg(lcfg);
rc = lustre_cfg_sanity_check(lcfg, REC_DATA_LEN(rec));
if (rc < 0)
return rc;
ldata = lcfg_cmd2data(lcfg->lcfg_command);
if (!ldata)
return -ENOTTY;
llog_get_marker_cfg_flags(rec, cfg_flags);
if ((lcfg->lcfg_command == LCFG_MARKER) && likely(!raw))
return 0;
/* entries outside marker are skipped */
if (!(*cfg_flags & CFG_F_MARKER) && !raw)
return 0;
/* inside skipped marker */
if ((*cfg_flags & CFG_F_SKIP) && !raw)
return 0;
/* form YAML entity */
ptr += snprintf(ptr, end - ptr, "- { index: %u, event: %s",
rec->lrh_index, ldata->ltd_name);
if (ptr >= end)
goto out_overflow;
if (lcfg->lcfg_flags) {
ptr += snprintf(ptr, end - ptr, ", flags: %#08x",
lcfg->lcfg_flags);
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_num) {
ptr += snprintf(ptr, end - ptr, ", num: %#08x",
lcfg->lcfg_num);
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_nid) {
char nidstr[LNET_NIDSTR_SIZE];
libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
ptr += snprintf(ptr, end - ptr, ", nid: %s(%#llx)",
nidstr, lcfg->lcfg_nid);
if (ptr >= end)
goto out_overflow;
}
if (LUSTRE_CFG_BUFLEN(lcfg, 0) > 0) {
ptr += snprintf(ptr, end - ptr, ", device: %s",
lustre_cfg_string(lcfg, 0));
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_command == LCFG_SET_PARAM) {
/*
* set_param -P parameters have param=val here, separate
* them through pointer magic and print them out in
* native yamlese
*/
char *cfg_str = lustre_cfg_string(lcfg, 1);
char *tmp = strchr(cfg_str, '=');
size_t len;
if (!tmp)
goto out_done;
ptr += snprintf(ptr, end - ptr, ", %s: ", ldata->ltd_bufs[0]);
if (ptr >= end)
goto out_overflow;
len = tmp - cfg_str + 1;
snprintf(ptr, len, "%s", cfg_str);
ptr += len - 1;
if (ptr >= end)
goto out_overflow;
ptr += snprintf(ptr, end - ptr, ", %s: ", ldata->ltd_bufs[1]);
if (ptr >= end)
goto out_overflow;
ptr += snprintf(ptr, end - ptr, "%s", tmp + 1);
if (ptr >= end)
goto out_overflow;
goto out_done;
}
if (lcfg->lcfg_command == LCFG_MARKER) {
struct cfg_marker *marker;
marker = lustre_cfg_buf(lcfg, 1);
ptr += snprintf(ptr, end - ptr, ", flags: %#04x",
marker->cm_flags);
if (ptr >= end)
goto out_overflow;
ptr += snprintf(ptr, end - ptr, ", version: %d.%d.%d.%d",
OBD_OCD_VERSION_MAJOR(marker->cm_vers),
OBD_OCD_VERSION_MINOR(marker->cm_vers),
OBD_OCD_VERSION_PATCH(marker->cm_vers),
OBD_OCD_VERSION_FIX(marker->cm_vers));
if (ptr >= end)
goto out_overflow;
ptr += snprintf(ptr, end - ptr, ", createtime: %lld",
marker->cm_createtime);
if (ptr >= end)
goto out_overflow;
ptr += snprintf(ptr, end - ptr, ", canceltime: %lld",
marker->cm_canceltime);
if (ptr >= end)
goto out_overflow;
goto out_done;
}
for (i = 1; i < lcfg->lcfg_bufcount; i++) {
if (LUSTRE_CFG_BUFLEN(lcfg, i) > 0) {
ptr += snprintf(ptr, end - ptr, ", %s: %s",
ldata->ltd_bufs[i - 1],
lustre_cfg_string(lcfg, i));
if (ptr >= end)
goto out_overflow;
}
}
out_done:
ptr += snprintf(ptr, end - ptr, " }\n");
out_overflow:
/* Return consumed bytes. If the buffer overflowed, zero last byte */
rc = ptr - buf;
if (rc >= size) {
rc = -EOVERFLOW;
*(end - 1) = '\0';
}
return rc;
}
#endif /* CONFIG_LUSTRE_FS_SERVER */
/*
* parse config record and output dump in supplied buffer.
* This is separated from class_config_dump_handler() to use
* for ioctl needs as well
*/
static int class_config_parse_rec(struct llog_rec_hdr *rec, char *buf, int size)
{
struct lustre_cfg *lcfg = REC_DATA(rec);
char *ptr = buf;
char *end = buf + size;
int rc = 0;
ENTRY;
LASSERT(rec->lrh_type == OBD_CFG_REC);
if (ptr >= end)
goto out_overflow;
rc = lustre_cfg_sanity_check(lcfg, REC_DATA_LEN(rec));
if (rc < 0)
RETURN(rc);
ptr += snprintf(ptr, end - ptr, "cmd=%05x ", lcfg->lcfg_command);
if (ptr >= end)
goto out_overflow;
if (lcfg->lcfg_flags) {
ptr += snprintf(ptr, end - ptr, "flags=%#08x ",
lcfg->lcfg_flags);
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_num) {
ptr += snprintf(ptr, end - ptr, "num=%#08x ", lcfg->lcfg_num);
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_nid) {
char nidstr[LNET_NIDSTR_SIZE];
libcfs_nid2str_r(lcfg->lcfg_nid, nidstr, sizeof(nidstr));
ptr += snprintf(ptr, end - ptr, "nid=%s(%#llx) ",
nidstr, lcfg->lcfg_nid);
if (ptr >= end)
goto out_overflow;
}
if (lcfg->lcfg_command == LCFG_MARKER) {
struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
ptr += snprintf(ptr, end - ptr, "marker=%d(%#x)%s '%s'",
marker->cm_step, marker->cm_flags,
marker->cm_tgtname, marker->cm_comment);
if (ptr >= end)
goto out_overflow;
} else {
int i;
for (i = 0; i < lcfg->lcfg_bufcount; i++) {
ptr += snprintf(ptr, end - ptr, "%d:%s ", i,
lustre_cfg_string(lcfg, i));
if (ptr >= end)
goto out_overflow;
}
}
ptr += snprintf(ptr, end - ptr, "\n");
/* return consumed bytes */
out_overflow:
rc = ptr - buf;
RETURN(rc);
}
int class_config_dump_handler(const struct lu_env *env,
struct llog_handle *handle,
struct llog_rec_hdr *rec, void *data)
{
char *outstr;
int rc = 0;
ENTRY;
OBD_ALLOC(outstr, 256);
if (!outstr)
RETURN(-ENOMEM);
if (rec->lrh_type == OBD_CFG_REC) {
class_config_parse_rec(rec, outstr, 256);
LCONSOLE(D_WARNING, " %s\n", outstr);
} else {
LCONSOLE(D_WARNING, "unhandled lrh_type: %#x\n", rec->lrh_type);
rc = -EINVAL;
}
OBD_FREE(outstr, 256);
RETURN(rc);
}
/**
* class_manual_cleanup() - Call class_cleanup and class_detach.
* @obd: device to cleanup
*
* "Manual" only in the sense that we're faking lcfg commands.
*
* Return:
* * %0 on success
* * %negative on error
*/
int class_manual_cleanup(struct obd_device *obd)
{
char flags[3] = "";
char name[MAX_OBD_NAME];
struct lustre_cfg *lcfg;
struct lustre_cfg_bufs bufs;
int rc;
ENTRY;
if (!obd) {
CERROR("empty cleanup\n");
RETURN(-EALREADY);
}
if (test_bit(OBDF_FORCE, obd->obd_flags))
strlcat(flags, "F", sizeof(flags));
if (test_bit(OBDF_FAIL, obd->obd_flags))
strlcat(flags, "A", sizeof(flags));
/* Save obd_name before cleanup/detach as they may drop the
* last reference and free obd (LU-8453).
*/
strscpy(name, obd->obd_name, sizeof(name));
CDEBUG(D_CONFIG, "Manual cleanup of %s (flags='%s')\n",
name, flags);
lustre_cfg_bufs_reset(&bufs, name);
lustre_cfg_bufs_set_string(&bufs, 1, flags);
OBD_ALLOC(lcfg, lustre_cfg_len(bufs.lcfg_bufcount, bufs.lcfg_buflen));
if (!lcfg)
RETURN(-ENOMEM);
lustre_cfg_init(lcfg, LCFG_CLEANUP, &bufs);
rc = class_process_config(lcfg, NULL);
if (rc) {
CERROR("%s: cleanup failed: rc = %d\n", name, rc);
GOTO(out, rc);
}
/* the lcfg is almost the same for both ops */
lcfg->lcfg_command = LCFG_DETACH;
rc = class_process_config(lcfg, NULL);
if (rc)
CERROR("%s: detach failed: rc = %d\n", name, rc);
out:
OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens));
RETURN(rc);
}
EXPORT_SYMBOL(class_manual_cleanup);
#ifdef CONFIG_LUSTRE_FS_SERVER
/*
* client_generation<->export hash operations
*/
static unsigned int
gen_hash(struct cfs_hash *hs, const void *key, const unsigned int bits)
{
/* XXX did hash needs ? */
return cfs_hash_djb2_hash(key, sizeof(__u32), bits);
}
static void *
gen_key(struct hlist_node *hnode)
{
struct obd_export *exp;
exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
RETURN(&exp->exp_target_data.ted_lcd->lcd_generation);
}
/*
* NOTE: It is impossible to find an export that is in failed
* state with this function
*/
static int
gen_kepcmp(const void *key, struct hlist_node *hnode)
{
struct obd_export *exp;
LASSERT(key);
exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
RETURN(exp->exp_target_data.ted_lcd->lcd_generation == *(__u32 *)key &&
!exp->exp_failed);
}
static void *
gen_export_object(struct hlist_node *hnode)
{
return hlist_entry(hnode, struct obd_export, exp_gen_hash);
}
static void
gen_export_get(struct cfs_hash *hs, struct hlist_node *hnode)
{
struct obd_export *exp;
exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
class_export_get(exp);
}
static void
gen_export_put_locked(struct cfs_hash *hs, struct hlist_node *hnode)
{
struct obd_export *exp;
exp = hlist_entry(hnode, struct obd_export, exp_gen_hash);
class_export_put(exp);
}
static struct cfs_hash_ops gen_hash_ops = {
.hs_hash = gen_hash,
.hs_key = gen_key,
.hs_keycmp = gen_kepcmp,
.hs_object = gen_export_object,
.hs_get = gen_export_get,
.hs_put_locked = gen_export_put_locked,
};
#endif /* CONFIG_LUSTRE_FS_SERVER */
