Viewing: ofd_obd.c
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2012, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* This file contains OBD API methods for OBD Filter Device (OFD) which are
* used for export handling, configuration purposes and recovery.
* Several methods are used by ECHO client only since it still uses OBD API.
* Such methods have _echo_ prefix in name.
*
* Author: Andreas Dilger <andreas.dilger@intel.com>
* Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
* Author: Mikhail Pershin <mike.pershin@intel.com>
*/
#define DEBUG_SUBSYSTEM S_FILTER
#include "ofd_internal.h"
#include <obd_cksum.h>
#include <uapi/linux/lustre/lustre_ioctl.h>
#include <lustre_quota.h>
#include <lustre_lfsck.h>
#include <lustre_nodemap.h>
#include <obd_support.h>
/**
* ofd_export_stats_init() - Initialize OFD per-export statistics.
* @ofd: OFD device
* @exp: OBD export
* @client_nid: NID of client
*
* This function sets up procfs entries for various OFD export counters. These
* counters are for per-client statistics tracked on the server.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_export_stats_init(struct ofd_device *ofd,
struct obd_export *exp,
struct lnet_nid *client_nid)
{
struct obd_device *obd = ofd_obd(ofd);
char param[MAX_OBD_NAME * 4];
struct nid_stat *stats;
int rc;
ENTRY;
if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
/* Self-export gets no proc entry */
RETURN(0);
rc = lprocfs_exp_setup(exp, client_nid);
if (rc != 0)
/* Mask error for already created /proc entries */
RETURN(rc == -EALREADY ? 0 : rc);
stats = exp->exp_nid_stats;
scnprintf(param, sizeof(param), "obdfilter.%s.exports.%s.stats",
obd->obd_name, libcfs_nidstr(client_nid));
stats->nid_stats = ldebugfs_stats_alloc(LPROC_OFD_STATS_LAST, param,
stats->nid_debugfs,
LPROCFS_STATS_FLAG_NOPERCPU);
if (!stats->nid_stats)
RETURN(-ENOMEM);
ofd_stats_counter_init(stats->nid_stats, 0, LPROCFS_CNTR_HISTOGRAM);
rc = lprocfs_nid_ldlm_stats_init(stats);
RETURN(rc);
}
/**
* ofd_parse_connect_data() - Match client & OST server connection feature flags
* @env: execution environment
* @exp: the obd_export associated with this client/target pair
* @data: stores data for this connect request
* @new_connection: is this connection new or not
*
* Compute the compatibility flags for a connection request based on
* features mutually supported by client and server.
*
* The obd_export::exp_connect_data.ocd_connect_flags field in @exp
* must not be updated here, otherwise a partially initialized value may
* be exposed. After the connection request is successfully processed,
* the top-level tgt_connect() request handler atomically updates the export
* connect flags from the obd_connect_data::ocd_connect_flags field of the
* reply. \see tgt_connect().
*
* Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a
* full struct obd_connect_data. So care must be taken when accessing fields
* that are not present in struct obd_connect_data_v1. See LU-16.
*
* Return:
* * %0 if success
* * %-EPROTO client and server feature requirements are incompatible
* * %-EBADF OST index in connect request doesn't match real OST index
*/
static int ofd_parse_connect_data(const struct lu_env *env,
struct obd_export *exp,
struct obd_connect_data *data,
bool new_connection)
{
struct ofd_device *ofd = ofd_exp(exp);
struct filter_export_data *fed = &exp->exp_filter_data;
if (!data)
RETURN(0);
CDEBUG(D_RPCTRACE,
"%s: cli %s/%p ocd_connect_flags: %#llx ocd_version: %x ocd_grant: %d ocd_index: %u ocd_group %u\n",
exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
data->ocd_connect_flags, data->ocd_version,
data->ocd_grant, data->ocd_index, data->ocd_group);
if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
CWARN("!!! This export (nid %s) used object group %d earlier; now it's trying to use group %d! This could be a bug in the MDS. Please report to https://jira.whamcloud.com/\n",
obd_export_nid2str(exp), fed->fed_group,
data->ocd_group);
RETURN(-EPROTO);
}
fed->fed_group = data->ocd_group;
data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
data->ocd_connect_flags2 &= OST_CONNECT_SUPPORTED2;
/* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
if (data->ocd_connect_flags & OBD_CONNECT_MDS)
CDEBUG(D_HA, "%s: Received MDS connection for group %u\n",
exp->exp_obd->obd_name, data->ocd_group);
else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
RETURN(-EPROTO);
/* Determine optimal brw size before calculating grant */
if (CFS_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
data->ocd_brw_size = 65536;
} else if (OCD_HAS_FLAG(data, BRW_SIZE)) {
if (data->ocd_brw_size > ofd->ofd_brw_size)
data->ocd_brw_size = ofd->ofd_brw_size;
if (data->ocd_brw_size == 0) {
CERROR("%s: cli %s/%p ocd_connect_flags: %#llx ocd_version: %x ocd_grant: %d ocd_index: %u ocd_brw_size is unexpectedly zero, network data corruption? Refusing connection of this client\n",
exp->exp_obd->obd_name,
exp->exp_client_uuid.uuid,
exp, data->ocd_connect_flags, data->ocd_version,
data->ocd_grant, data->ocd_index);
RETURN(-EPROTO);
}
}
if (OCD_HAS_FLAG(data, GRANT_PARAM)) {
struct dt_device_param *ddp = &ofd->ofd_lut.lut_dt_conf;
/* client is reporting its page size, for future use */
exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits;
data->ocd_grant_blkbits = ofd->ofd_lut.lut_tgd.tgd_blockbits;
/*
* ddp_inodespace may not be power-of-two value, eg. for ldiskfs
* it's LDISKFS_DIR_REC_LEN(20) = 28.
*/
data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1);
/* ocd_grant_tax_kb is in 1K byte blocks */
data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10;
data->ocd_grant_max_blks = ddp->ddp_max_extent_blks;
}
/*
* Save connect_data we have so far because tgt_grant_connect()
* uses it to calculate grant, and we want to save the client
* version before it is overwritten by LUSTRE_VERSION_CODE.
*/
exp->exp_connect_data = *data;
if (OCD_HAS_FLAG(data, GRANT))
tgt_grant_connect(env, exp, data, new_connection);
if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
int index = lsd->lsd_osd_index;
if (index != data->ocd_index) {
LCONSOLE_ERROR("Connection from %s to index %u doesn't match actual OST index %u in last_rcvd file, bad configuration?\n",
obd_export_nid2str(exp), index,
data->ocd_index);
RETURN(-EBADF);
}
if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
/* this will only happen on the first connect */
lsd->lsd_feature_compat |= OBD_COMPAT_OST;
/*
* sync is not needed here as tgt_client_new will
* set exp_need_sync flag
*/
tgt_server_data_update(env, &ofd->ofd_lut, 0);
}
}
if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
__u32 cksum_types = data->ocd_cksum_types;
tgt_mask_cksum_types(&ofd->ofd_lut, &data->ocd_cksum_types);
if (unlikely(data->ocd_cksum_types == 0)) {
CERROR("%s: Connect with checksum support but no ocd_cksum_types is set\n",
exp->exp_obd->obd_name);
RETURN(-EPROTO);
}
CDEBUG(D_RPCTRACE,
"%s: cli %s supports cksum type %x, return %x\n",
exp->exp_obd->obd_name, obd_export_nid2str(exp),
cksum_types, data->ocd_cksum_types);
} else {
/*
* This client does not support OBD_CONNECT_CKSUM.
* Report failure to negotiate checksum at connect
*/
CDEBUG(D_RPCTRACE,
"%s: cli %s does not support OBD_CONNECT_CKSUM\n",
exp->exp_obd->obd_name, obd_export_nid2str(exp));
}
if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
data->ocd_maxbytes = ofd->ofd_lut.lut_dt_conf.ddp_maxbytes;
data->ocd_version = LUSTRE_VERSION_CODE;
if (OCD_HAS_FLAG(data, PINGLESS) && !ptlrpc_pinger_suppress_pings())
data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
if (!OCD_HAS_FLAG(data, PINGLESS)) {
spin_lock(&exp->exp_lock);
exp->exp_timed = 1;
spin_unlock(&exp->exp_lock);
}
if (!ofd->ofd_lut.lut_dt_conf.ddp_has_lseek_data_hole)
data->ocd_connect_flags2 &= ~OBD_CONNECT2_LSEEK;
RETURN(0);
}
/**
* ofd_obd_reconnect() - Re-initialize export upon client reconnection.
* @env: execution environment
* @exp: OBD export
* @obd: OFD device
* @cluuid: NID of client
* @data: connection data from request
* @localdata: client NID
*
* This function parses connection data from reconnect and resets
* export statistics.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
struct obd_device *obd, struct obd_uuid *cluuid,
struct obd_connect_data *data,
void *localdata)
{
struct ptlrpc_request *req = localdata;
struct ptlrpc_svc_ctx *svc_ctx = NULL;
struct lnet_nid *client_nid = NULL;
struct ofd_device *ofd;
int rc;
ENTRY;
if (!exp || !obd || !cluuid)
RETURN(-EINVAL);
if (req) {
svc_ctx = req->rq_svc_ctx;
client_nid = &req->rq_peer.nid;
}
if (svc_ctx || client_nid) {
rc = nodemap_add_member(svc_ctx, client_nid, exp);
if (rc != 0 && rc != -EEXIST)
RETURN(rc);
} else {
CDEBUG(D_HA,
"%s: cannot find nodemap for client %s: svc_ctx and nid are null\n",
obd->obd_name, cluuid->uuid);
}
ofd = ofd_dev(obd->obd_lu_dev);
rc = ofd_parse_connect_data(env, exp, data, false);
if (rc == 0) {
if (client_nid)
ofd_export_stats_init(ofd, exp, client_nid);
} else {
nodemap_del_member(exp);
}
RETURN(rc);
}
/**
* ofd_obd_connect() - Initialize new client connection.
* @env: execution environment
* @_exp: stores pointer to new export [out]
* @obd: OFD device
* @cluuid: client UUID
* @data: connection data from request
* @localdata: client NID
*
* This function handles new connection to the OFD. The new export is
* created (in context of class_connect()) and persistent client data is
* initialized on storage.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
struct obd_device *obd, struct obd_uuid *cluuid,
struct obd_connect_data *data, void *localdata)
{
struct ptlrpc_request *req = localdata;
struct ptlrpc_svc_ctx *svc_ctx = NULL;
struct lnet_nid *client_nid = NULL;
struct lustre_handle conn = { 0 };
struct obd_export *exp;
struct ofd_device *ofd;
int rc;
ENTRY;
if (!_exp || !obd || !cluuid)
RETURN(-EINVAL);
ofd = ofd_dev(obd->obd_lu_dev);
rc = class_connect(&conn, obd, cluuid);
if (rc)
RETURN(rc);
exp = class_conn2export(&conn);
LASSERT(exp != NULL);
if (req) {
svc_ctx = req->rq_svc_ctx;
client_nid = &req->rq_peer.nid;
}
if (svc_ctx || client_nid) {
rc = nodemap_add_member(svc_ctx, client_nid, exp);
if (rc != 0 && rc != -EEXIST)
GOTO(out, rc);
} else {
CDEBUG(D_HA,
"%s: cannot find nodemap for client %s: svc_ctx and nid are null\n",
obd->obd_name, cluuid->uuid);
}
rc = ofd_parse_connect_data(env, exp, data, true);
if (rc)
GOTO(out, rc);
if (test_bit(OBDF_REPLAYABLE, obd->obd_flags)) {
struct tg_export_data *ted = &exp->exp_target_data;
memcpy(ted->ted_lcd->lcd_uuid, cluuid,
sizeof(ted->ted_lcd->lcd_uuid));
rc = tgt_client_new(env, exp);
if (rc != 0)
GOTO(out, rc);
if (client_nid)
ofd_export_stats_init(ofd, exp, client_nid);
}
CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name,
data ? data->ocd_group : -1);
out:
if (rc != 0) {
class_disconnect(exp);
nodemap_del_member(exp);
*_exp = NULL;
} else {
*_exp = exp;
}
RETURN(rc);
}
/**
* ofd_obd_disconnect() - Disconnect a connected client.
* @exp: OBD export
*
* This function terminates the client connection. The client export is
* disconnected (cleaned up) and client data on persistent storage is removed.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_obd_disconnect(struct obd_export *exp)
{
struct ofd_device *ofd = ofd_exp(exp);
struct lu_env env;
int rc;
ENTRY;
LASSERT(exp);
class_export_get(exp);
rc = server_disconnect_export(exp);
tgt_grant_discard(exp);
if (!(exp->exp_flags & OBD_OPT_FORCE))
tgt_grant_sanity_check(ofd_obd(ofd), __func__);
/* Do not erase record for recoverable client. */
if (test_bit(OBDF_REPLAYABLE, exp->exp_obd->obd_flags) &&
(!test_bit(OBDF_FAIL, exp->exp_obd->obd_flags) || exp->exp_failed)) {
rc = lu_env_init(&env, LCT_DT_THREAD);
if (rc)
GOTO(out, rc);
tgt_client_del(&env, exp);
lu_env_fini(&env);
}
out:
nodemap_del_member(exp);
class_export_put(exp);
RETURN(rc);
}
/**
* ofd_init_export() - Implementation of obd_ops::o_init_export.
* @exp: OBD export
*
* This function is called from class_new_export() and initializes
* the OFD-specific data for new export.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_init_export(struct obd_export *exp)
{
int rc;
atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0);
spin_lock(&exp->exp_lock);
exp->exp_connecting = 1;
spin_unlock(&exp->exp_lock);
/* self-export doesn't need client data and ldlm initialization */
if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
&exp->exp_client_uuid)))
return 0;
rc = tgt_client_alloc(exp);
if (rc == 0)
ldlm_init_export(exp);
if (rc)
CERROR("%s: Can't initialize export: rc %d\n",
exp->exp_obd->obd_name, rc);
return rc;
}
/**
* ofd_destroy_export() - Implementation of obd_ops::o_destroy_export.
* @exp: OBD export
*
* This function is called from class_export_destroy() to cleanup
* the OFD-specific data for export being destroyed.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_destroy_export(struct obd_export *exp)
{
struct ofd_device *ofd = ofd_exp(exp);
if (exp->exp_target_data.ted_pending)
CERROR("%s: cli %s/%p has %lu pending on destroyed export\n",
exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
exp, exp->exp_target_data.ted_pending);
target_destroy_export(exp);
if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
&exp->exp_client_uuid)))
return 0;
ldlm_destroy_export(exp);
tgt_client_free(exp);
/*
* discard grants once we're sure no more
* interaction with the client is possible
*/
tgt_grant_discard(exp);
if (exp_connect_flags(exp) & OBD_CONNECT_GRANT)
ofd->ofd_lut.lut_tgd.tgd_tot_granted_clients--;
if (!(exp->exp_flags & OBD_OPT_FORCE))
tgt_grant_sanity_check(exp->exp_obd, __func__);
return 0;
}
/**
* ofd_postrecov() - Notify all devices in server stack about recovery
* completion
* @env: execution environment
* @ofd: OFD device
*
* This function calls ldo_recovery_complete() for all lower devices in the
* server stack so they will be prepared for normal operations.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd)
{
struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev;
int rc;
CDEBUG(D_HA, "%s: recovery is over\n", ofd_name(ofd));
if (!ofd->ofd_skip_lfsck && !ofd->ofd_osd->dd_rdonly) {
struct lfsck_start_param lsp;
lsp.lsp_start = NULL;
lsp.lsp_index_valid = 0;
rc = lfsck_start(env, ofd->ofd_osd, &lsp);
if (rc != 0 && rc != -EALREADY)
CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
ofd_name(ofd), rc);
}
return ldev->ld_ops->ldo_recovery_complete(env, ldev);
}
/**
* ofd_obd_postrecov() - Implementation of obd_ops::o_postrecov.
* @obd: OBD device of OFD
*
* This function is called from target_finish_recovery() upon recovery
* completion.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_obd_postrecov(struct obd_device *obd)
{
struct lu_env env;
struct lu_device *ldev = obd->obd_lu_dev;
int rc;
ENTRY;
rc = lu_env_init(&env, LCT_DT_THREAD);
if (rc)
RETURN(rc);
ofd_info_init(&env, obd->obd_self_export);
rc = ofd_postrecov(&env, ofd_dev(ldev));
lu_env_fini(&env);
RETURN(rc);
}
/**
* ofd_set_info_async() - Implementation of obd_ops::o_set_info_async.
* @env: execution environment
* @exp: OBD export of OFD device
* @keylen: length of @key
* @key: key name
* @vallen: length of @val
* @val: the @key value
* @set: not used in OFD
*
* This function is not called from request handler, it is only used by
* class_notify_sptlrpc_conf() locally by direct obd_set_info_async() call.
* \see ofd_set_info_hdl() for request handler function.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
__u32 keylen, void *key, __u32 vallen, void *val,
struct ptlrpc_request_set *set)
{
int rc = 0;
ENTRY;
if (!exp->exp_obd) {
CDEBUG(D_IOCTL, "invalid export %p\n", exp);
RETURN(-EINVAL);
}
if (KEY_IS(KEY_SPTLRPC_CONF)) {
rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp));
} else {
CERROR("%s: Unsupported key %s\n",
exp->exp_obd->obd_name, (char *)key);
rc = -EOPNOTSUPP;
}
RETURN(rc);
}
/**
* ofd_get_info() - Implementation of obd_ops::o_get_info.
* @env: execution environment
* @exp: OBD export of OFD device
* @keylen: length of @key
* @key: key name
* @vallen: length of key value [out]
* @val: the key value to return [out]
*
* This function is not called from request handler, it is only used by
* direct call from nrs_orr_range_fill_physical() in ptlrpc, see LU-3239.
*
* \see ofd_get_info_hdl() for request handler function.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
__u32 keylen, void *key, __u32 *vallen, void *val)
{
struct ofd_thread_info *info;
struct ofd_device *ofd;
struct ll_fiemap_info_key *fm_key = key;
struct fiemap *fiemap = val;
int rc = 0;
ENTRY;
if (!exp->exp_obd) {
CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
RETURN(-EINVAL);
}
ofd = ofd_exp(exp);
if (KEY_IS(KEY_FIEMAP)) {
info = ofd_info_init(env, exp);
rc = ostid_to_fid(&info->fti_fid, &fm_key->lfik_oa.o_oi,
ofd->ofd_lut.lut_lsd.lsd_osd_index);
if (rc != 0)
RETURN(rc);
rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap);
} else {
CERROR("%s: not supported key %s\n",
ofd_name(ofd), (char *)key);
rc = -EOPNOTSUPP;
}
RETURN(rc);
}
/**
* ofd_statfs() - Implementation of obd_ops::o_statfs.
* @env: execution environment
* @exp: OBD export of OFD device
* @osfs: statistic data to return [out]
* @max_age: maximum age for cached data
* @flags: not used in OFD
*
* This function returns information about a storage file system.
* It is called from several places by using the OBD API as well as
* by direct call, e.g. from request handler.
*
* \see ofd_statfs_hdl() for request handler function.
*
* Report also the state of the OST to the caller in osfs->os_state
* (OS_STATFS_READONLY, OS_STATFS_DEGRADED).
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_statfs(const struct lu_env *env, struct obd_export *exp,
struct obd_statfs *osfs, time64_t max_age, __u32 flags)
{
struct obd_device *obd = class_exp2obd(exp);
struct ofd_device *ofd = ofd_exp(exp);
struct tg_grants_data *tgd = &ofd->ofd_lut.lut_tgd;
int current_blockbits;
int rc;
ENTRY;
rc = tgt_statfs_internal(env, &ofd->ofd_lut, osfs, max_age, NULL);
if (unlikely(rc))
GOTO(out, rc);
/* tgd_blockbit is recordsize bits set during mkfs.
* This once set does not change. However, 'zfs set'
* can be used to change the OST blocksize. Instead
* of using cached value of 'tgd_blockbit' always
* calculate the blocksize bits which may have
* changed.
*/
current_blockbits = fls64(osfs->os_bsize) - 1;
/*
* at least try to account for cached pages. its still racy and
* might be under-reporting if clients haven't announced their
* caches with brw recently
*/
CDEBUG(D_SUPER | D_CACHE,
"blocks cached %llu granted %llu pending %llu free %llu avail %llu\n",
tgd->tgd_tot_dirty, tgd->tgd_tot_granted,
tgd->tgd_tot_pending,
osfs->os_bfree << current_blockbits,
osfs->os_bavail << current_blockbits);
osfs->os_bavail -= min_t(u64, osfs->os_bavail,
((tgd->tgd_tot_dirty + tgd->tgd_tot_pending +
osfs->os_bsize - 1) >> current_blockbits));
/*
* The QoS code on the MDS does not care about space reserved for
* precreate, so take it out.
*/
if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
struct tg_export_data *ted;
ted = &obd->obd_self_export->exp_target_data;
osfs->os_granted = min_t(u64, osfs->os_bavail,
ted->ted_grant >> current_blockbits);
osfs->os_bavail -= osfs->os_granted;
}
tgt_grant_sanity_check(obd, __func__);
CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; "
"%llu objects: %llu free; state %x\n",
osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
osfs->os_files, osfs->os_ffree, osfs->os_state);
if (CFS_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
/* Reduce free inode count to zero, but keep "used" intact */
osfs->os_files -= osfs->os_ffree;
osfs->os_ffree -= osfs->os_ffree;
}
/* OS_STATFS_READONLY can be set by OSD already, only add flags */
if (ofd->ofd_readonly)
osfs->os_state |= OS_STATFS_READONLY;
if (ofd->ofd_raid_degraded)
osfs->os_state |= OS_STATFS_DEGRADED;
if (ofd->ofd_lut.lut_no_create)
osfs->os_state |= OS_STATFS_NOCREATE;
if (obd->obd_self_export != exp && !exp_grant_param_supp(exp) &&
current_blockbits > COMPAT_BSIZE_SHIFT) {
/*
* clients which don't support OBD_CONNECT_GRANT_PARAM
* should not see a block size > page size, otherwise
* cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
* block size which is the biggest block size known to work
* with all client's page size.
*/
osfs->os_blocks <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bfree <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bavail <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_granted <<= current_blockbits - COMPAT_BSIZE_SHIFT;
osfs->os_bsize = 1 << COMPAT_BSIZE_SHIFT;
}
if (CFS_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
/* Reduce free blocks count near zero, but keep "used" intact */
osfs->os_bavail -= osfs->os_bavail - 2;
osfs->os_blocks -= osfs->os_bfree - 2;
osfs->os_bfree -= osfs->os_bfree - 2;
}
EXIT;
out:
return rc;
}
/**
* ofd_echo_setattr() - Implementation of obd_ops::o_setattr.
* @env: execution environment
* @exp: OBD export of OFD device
* @oa: setattr parameters
*
* This function is only used by ECHO client when it is run on top of OFD,
* \see ofd_setattr_hdl() for request handler function.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp,
struct obdo *oa)
{
struct ofd_thread_info *info;
struct ofd_device *ofd = ofd_exp(exp);
struct ldlm_namespace *ns = ofd->ofd_namespace;
struct ldlm_resource *res;
struct ofd_object *fo;
struct lu_fid *fid = &oa->o_oi.oi_fid;
ktime_t kstart = ktime_get();
int rc = 0;
ENTRY;
info = ofd_info_init(env, exp);
ost_fid_build_resid(fid, &info->fti_resid);
/*
* This would be very bad - accidentally truncating a file when
* changing the time or similar - bug 12203.
*/
if (oa->o_valid & OBD_MD_FLSIZE) {
static char mdsinum[48];
if (oa->o_valid & OBD_MD_FLFID)
snprintf(mdsinum, sizeof(mdsinum) - 1,
"of parent "DFID, oa->o_parent_seq,
oa->o_parent_oid, 0);
else
mdsinum[0] = '\0';
CERROR("%s: setattr from %s trying to truncate object "DFID
" %s\n", ofd_name(ofd), obd_export_nid2str(exp),
PFID(fid), mdsinum);
GOTO(out, rc = -EPERM);
}
fo = ofd_object_find_exists(env, ofd, fid);
if (IS_ERR(fo)) {
CERROR("%s: can't find object "DFID"\n",
ofd_name(ofd), PFID(fid));
GOTO(out, rc = PTR_ERR(fo));
}
la_from_obdo(&info->fti_attr, oa, oa->o_valid);
info->fti_attr.la_valid &= ~LA_TYPE;
/* setting objects attributes (including owner/group) */
rc = ofd_attr_set(env, fo, &info->fti_attr, oa);
if (rc)
GOTO(out_unlock, rc);
ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL,
ktime_us_delta(ktime_get(), kstart));
EXIT;
out_unlock:
ofd_object_put(env, fo);
out:
if (rc == 0) {
/*
* we do not call this before to avoid lu_object_find() in
* ->lvbo_update() holding another reference on the object.
* otherwise concurrent destroy can make the object unavailable
* for 2nd lu_object_find() waiting for the first reference
* to go... deadlock!
*/
res = ldlm_resource_get(ns, &info->fti_resid, LDLM_EXTENT, 0);
if (!IS_ERR(res)) {
ldlm_res_lvbo_update(res, NULL, 0);
ldlm_resource_putref(res);
}
}
return rc;
}
/**
* ofd_destroy_by_fid() - Destroy OFD object by its FID.
* @env: execution environment
* @ofd: OFD device
* @fid: FID of object
* @orphan: set if object being destroyed is an orphan
*
* Supplemental function to destroy object by FID, it is used by request
* handler and by ofd_echo_destroy() below to find object by FID, lock it
* and call ofd_destroy() finally.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd,
const struct lu_fid *fid, int orphan)
{
struct ofd_thread_info *info = ofd_info(env);
struct lustre_handle lockh;
union ldlm_policy_data policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
struct ofd_object *fo;
__u64 flags = LDLM_FL_AST_DISCARD_DATA | LDLM_FL_BLOCK_NOWAIT;
__u64 rc = 0;
ENTRY;
fo = ofd_object_find_exists(env, ofd, fid);
if (IS_ERR(fo))
RETURN(PTR_ERR(fo));
/*
* Tell the clients that the object is gone now and that they should
* throw away any cached pages.
*/
ost_fid_build_resid(fid, &info->fti_resid);
rc = ldlm_cli_enqueue_local(env, ofd->ofd_namespace, &info->fti_resid,
LDLM_EXTENT, &policy, LCK_PW, &flags,
ldlm_blocking_ast, ldlm_completion_ast,
NULL, NULL, 0, LVB_T_NONE, NULL, &lockh);
/* We only care about the side-effects, just drop the lock. */
if (rc == ELDLM_OK) {
ldlm_lock_decref(&lockh, LCK_PW);
LASSERT(fo != NULL);
rc = ofd_destroy(env, fo, orphan);
EXIT;
} else if (rc == -EAGAIN) {
CDEBUG(D_HA, "%s: Object "DFID" is locked, skiping destroy\n",
ofd->ofd_osd_exp->exp_obd->obd_name, PFID(fid));
rc = -EIO;
}
ofd_object_put(env, fo);
RETURN(rc);
}
/**
* ofd_echo_destroy() - Implementation of obd_ops::o_destroy.
* @env: execution environment
* @exp: OBD export of OFD device
* @oa: obdo structure with FID
*
* This function is only used by ECHO client when it is run on top of OFD,
* \see ofd_destroy_hdl() for request handler function.
*
* Note: this is OBD API method which is common API for server OBDs and
* client OBDs. Thus some parameters used in client OBDs may not be used
* on server OBDs and vice versa.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
struct obdo *oa)
{
struct ofd_device *ofd = ofd_exp(exp);
struct lu_fid *fid = &oa->o_oi.oi_fid;
int rc = 0;
ENTRY;
ofd_info_init(env, exp);
rc = ofd_validate_seq(exp, ostid_seq(&oa->o_oi));
if (rc != 0)
RETURN(rc);
CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
rc = ofd_destroy_by_fid(env, ofd, fid, 0);
if (rc == -ENOENT) {
CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n",
ofd_name(ofd), PFID(fid));
GOTO(out, rc);
} else if (rc != 0) {
CERROR("%s: error destroying object "DFID": %d\n",
ofd_name(ofd), PFID(fid), rc);
GOTO(out, rc);
}
EXIT;
out:
return rc;
}
/**
* ofd_echo_create() - Implementation of obd_ops::o_create.
* @env: execution environment
* @exp: OBD export of OFD device
* @oa: obdo structure with FID sequence to use
*
* This function is only used by ECHO client when it is run on top of OFD
* and just creates an object.
* \see ofd_create_hdl() for request handler function.
*
* Note: this is OBD API method which is common API for server OBDs and
* client OBDs. Thus some parameters used in client OBDs may not be used
* on server OBDs and vice versa.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
struct obdo *oa)
{
struct ofd_device *ofd = ofd_exp(exp);
u64 seq = ostid_seq(&oa->o_oi);
struct ofd_seq *oseq;
long granted;
u64 next_id;
s64 diff = 1;
int rc = 0;
int count;
ENTRY;
if (ofd->ofd_lut.lut_no_create)
return -EPERM;
ofd_info_init(env, exp);
LASSERT(seq == FID_SEQ_ECHO);
LASSERT(oa->o_valid & OBD_MD_FLGROUP);
CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
down_read(&ofd->ofd_lastid_rwsem);
/*
* Currently, for safe, we do not distinguish which LAST_ID is broken,
* we may do that in the future.
* Return -ENOSPC until the LAST_ID rebuilt.
*/
if (unlikely(ofd->ofd_lastid_rebuilding))
GOTO(out_sem, rc = -ENOSPC);
rc = ofd_validate_seq(exp, seq);
if (rc != 0)
RETURN(rc);
oseq = ofd_seq_load(env, ofd, seq);
if (IS_ERR(oseq)) {
CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n",
ofd_name(ofd), seq, PTR_ERR(oseq));
GOTO(out_sem, rc = -EINVAL);
}
mutex_lock(&oseq->os_create_lock);
granted = tgt_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
if (granted < 0) {
rc = granted;
granted = 0;
CDEBUG(D_HA,
"%s: failed to acquire grant space for precreate (%lld): rc = %d\n",
ofd_name(ofd), diff, rc);
diff = 0;
GOTO(out, rc);
}
next_id = ofd_seq_last_oid(oseq) + 1;
count = ofd_precreate_batch(ofd, (int)diff);
rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0, false);
if (rc < 0) {
CERROR("%s: unable to precreate: rc = %d\n",
ofd_name(ofd), rc);
} else {
rc = ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq));
if (rc) {
CERROR("%s: Bad %llu to set " DOSTID " : rc %d\n",
ofd_name(ofd),
(unsigned long long)ofd_seq_last_oid(oseq),
POSTID(&oa->o_oi), rc);
}
oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
}
tgt_grant_commit(ofd_obd(ofd)->obd_self_export, granted, rc);
out:
mutex_unlock(&oseq->os_create_lock);
ofd_seq_put(env, oseq);
out_sem:
up_read(&ofd->ofd_lastid_rwsem);
RETURN(rc);
}
/**
* ofd_echo_getattr() - Implementation of obd_ops::o_getattr.
* @env: execution environment
* @exp: OBD export of OFD device
* @oa: contains FID of object to get attributes from and is used to return
* attributes back [in,out]
*
* This function is only used by ECHO client when it is run on top of OFD
* and returns attributes of object.
* \see ofd_getattr_hdl() for request handler function.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
struct obdo *oa)
{
struct ofd_device *ofd = ofd_exp(exp);
struct ofd_thread_info *info;
struct lu_fid *fid = &oa->o_oi.oi_fid;
struct ofd_object *fo;
int rc = 0;
ENTRY;
info = ofd_info_init(env, exp);
fo = ofd_object_find_exists(env, ofd, fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
LASSERT(fo != NULL);
rc = ofd_attr_get(env, fo, &info->fti_attr);
oa->o_valid = OBD_MD_FLID;
if (rc == 0) {
__u64 curr_version;
obdo_from_la(oa, &info->fti_attr,
OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
/* Store object version in reply */
curr_version = dt_version_get(env, ofd_object_child(fo));
if ((__s64)curr_version != -EOPNOTSUPP) {
oa->o_valid |= OBD_MD_FLDATAVERSION;
oa->o_data_version = curr_version;
}
}
ofd_object_put(env, fo);
out:
RETURN(rc);
}
/**
* ofd_ioc_get_obj_version() - Get object version for OBD_IOC_GET_OBJ_VERSION
* ioctl.
* @env: execution environment
* @ofd: OFD device
* @karg: ioctl data [out]
*
* This is supplemental function for ofd_iocontrol() to return object
* version for lctl tool.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_ioc_get_obj_version(const struct lu_env *env,
struct ofd_device *ofd, void *karg)
{
struct obd_ioctl_data *data = karg;
struct lu_fid fid;
struct ofd_object *fo;
dt_obj_version_t version;
int rc = 0;
ENTRY;
if (!data || !data->ioc_inlbuf2 || data->ioc_inllen2 != sizeof(version))
GOTO(out, rc = -EINVAL);
if (data->ioc_inlbuf1 && data->ioc_inllen1 == sizeof(fid)) {
fid = *(struct lu_fid *)data->ioc_inlbuf1;
} else if (data->ioc_inlbuf3 &&
data->ioc_inllen3 == sizeof(__u64) &&
data->ioc_inlbuf4 &&
data->ioc_inllen4 == sizeof(__u64)) {
struct ost_id ostid = { };
ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4);
rc = ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3);
if (rc)
GOTO(out, rc);
rc = ostid_to_fid(&fid, &ostid,
ofd->ofd_lut.lut_lsd.lsd_osd_index);
if (rc != 0)
GOTO(out, rc);
} else {
GOTO(out, rc = -EINVAL);
}
if (!fid_is_sane(&fid))
GOTO(out, rc = -EINVAL);
fo = ofd_object_find(env, ofd, &fid);
if (IS_ERR(fo))
GOTO(out, rc = PTR_ERR(fo));
if (!ofd_object_exists(fo))
GOTO(out_fo, rc = -ENOENT);
if (lu_object_remote(&fo->ofo_obj.do_lu))
GOTO(out_fo, rc = -EREMOTE);
version = dt_version_get(env, ofd_object_child(fo));
if (version == 0)
GOTO(out_fo, rc = -EIO);
*(dt_obj_version_t *)data->ioc_inlbuf2 = version;
EXIT;
out_fo:
ofd_object_put(env, fo);
out:
return rc;
}
/* this should sync the whole device */
static int ofd_device_sync(const struct lu_env *env, struct ofd_device *ofd)
{
lu_objects_destroy_delayed();
RETURN(dt_sync(env, ofd->ofd_osd));
}
/**
* ofd_iocontrol() - Implementation of obd_ops::o_iocontrol.
* @cmd: ioctl command
* @exp: OBD export of OFD
* @len: not used
* @karg: buffer with data [in, out]
* @uarg: not used
*
* This is OFD ioctl handling function which is primary interface for
* Lustre tools like lfs, lctl and lfsck.
*
* Return:
* * %0 if successful
* * %negative value on error
*/
static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void __user *uarg)
{
struct lu_env env;
struct ofd_device *ofd = ofd_exp(exp);
struct obd_device *obd = ofd_obd(ofd);
struct obd_ioctl_data *data;
int rc;
ENTRY;
CDEBUG(D_IOCTL, "%s: cmd=%x len=%u karg=%pK uarg=%pK\n",
obd->obd_name, cmd, len, karg, uarg);
rc = lu_env_init(&env, LCT_DT_THREAD);
if (rc)
RETURN(rc);
/* handle commands that don't use @karg first */
rc = -EINVAL;
switch (cmd) {
case OBD_IOC_ABORT_RECOVERY:
LCONSOLE_WARN("%s: Aborting recovery\n", obd->obd_name);
set_bit(OBDF_ABORT_RECOVERY, obd->obd_flags);
target_stop_recovery_thread(obd);
GOTO(out, rc);
case OBD_IOC_SYNC:
CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
rc = ofd_device_sync(&env, ofd);
GOTO(out, rc);
case OBD_IOC_SET_READONLY:
rc = ofd_device_sync(&env, ofd);
if (rc == 0)
rc = dt_ro(&env, ofd->ofd_osd);
GOTO(out, rc);
}
if (unlikely(karg == NULL)) {
OBD_IOC_ERROR(obd->obd_name, cmd, "karg=NULL", rc = -EINVAL);
GOTO(out, rc);
}
data = karg;
switch (cmd) {
case OBD_IOC_START_LFSCK: {
struct lfsck_start_param lsp;
lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
lsp.lsp_index_valid = 0;
rc = lfsck_start(&env, ofd->ofd_osd, &lsp);
break;
}
case OBD_IOC_STOP_LFSCK: {
struct lfsck_stop stop;
stop.ls_status = LS_STOPPED;
/* Old lfsck utils may pass NULL @stop. */
if (!data->ioc_inlbuf1)
stop.ls_flags = 0;
else
stop.ls_flags =
((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
rc = lfsck_stop(&env, ofd->ofd_osd, &stop);
break;
}
case OBD_IOC_GET_OBJ_VERSION:
rc = ofd_ioc_get_obj_version(&env, ofd, karg);
break;
default:
rc = OBD_IOC_ERROR(obd->obd_name, cmd, "unrecognized", -ENOTTY);
break;
}
out:
lu_env_fini(&env);
RETURN(rc);
}
/**
* ofd_health_check() - Implementation of obd_ops::o_health_check.
* @nul: not used
* @obd: OBD device of OFD
*
* This function checks the OFD device health - ability to respond on
* incoming requests. There are two health_check methods:
* - get statfs from the OSD. It checks just responsiveness of
* bottom device
* - do write attempt on bottom device to check it is fully operational and
* is not stuck. This is expensive method and must be manually enabled
* by setting the enable_health_write sysfs parameter.
*
* Return:
* * %0 if successful
* * %negative value in case of error
*/
static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
{
struct ofd_device *ofd = ofd_dev(obd->obd_lu_dev);
struct ofd_thread_info *info;
struct lu_env env;
struct thandle *th;
int rc1 = 0;
int rc = 0;
/* obd_proc_read_health pass NULL env, we need real one */
rc = lu_env_init(&env, LCT_DT_THREAD);
if (rc)
RETURN(rc);
info = ofd_info_init(&env, NULL);
rc = dt_statfs(&env, ofd->ofd_osd, &info->fti_u.osfs);
if (unlikely(rc))
GOTO(out, rc);
if (info->fti_u.osfs.os_state & OS_STATFS_READONLY)
GOTO(out, rc = -EROFS);
if (!obd_enable_health_write)
goto out;
OBD_ALLOC(info->fti_buf.lb_buf, PAGE_SIZE);
if (!info->fti_buf.lb_buf)
GOTO(out, rc = -ENOMEM);
info->fti_buf.lb_len = PAGE_SIZE;
info->fti_off = 0;
th = dt_trans_create(&env, ofd->ofd_osd);
if (IS_ERR(th))
GOTO(out, rc = PTR_ERR(th));
rc = dt_declare_record_write(&env, ofd->ofd_health_check_file,
&info->fti_buf, info->fti_off, th);
if (rc)
goto out_stop;
th->th_sync = 1; /* sync IO is needed */
rc = dt_trans_start_local(&env, ofd->ofd_osd, th);
if (rc)
goto out_stop;
rc = dt_record_write(&env, ofd->ofd_health_check_file,
&info->fti_buf, &info->fti_off,
th);
out_stop:
rc1 = dt_trans_stop(&env, ofd->ofd_osd, th);
rc = rc ? rc : rc1;
OBD_FREE(info->fti_buf.lb_buf, PAGE_SIZE);
CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",
rc);
out:
lu_env_fini(&env);
return !!rc;
}
const struct obd_ops ofd_obd_ops = {
.o_owner = THIS_MODULE,
.o_connect = ofd_obd_connect,
.o_reconnect = ofd_obd_reconnect,
.o_disconnect = ofd_obd_disconnect,
.o_create = ofd_echo_create,
.o_statfs = ofd_statfs,
.o_setattr = ofd_echo_setattr,
.o_preprw = ofd_preprw,
.o_commitrw = ofd_commitrw,
.o_destroy = ofd_echo_destroy,
.o_init_export = ofd_init_export,
.o_destroy_export = ofd_destroy_export,
.o_postrecov = ofd_obd_postrecov,
.o_getattr = ofd_echo_getattr,
.o_iocontrol = ofd_iocontrol,
.o_health_check = ofd_health_check,
.o_set_info_async = ofd_set_info_async,
.o_get_info = ofd_get_info,
};
