*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
- * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
- *
- * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
- * CA 95054 USA or visit www.sun.com if you need additional information or
- * have any questions.
+ * http://www.gnu.org/licenses/gpl-2.0.html
*
* GPL HEADER END
*/
* Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2012, 2013, Intel Corporation.
+ * Copyright (c) 2012, 2015, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*
* lustre/ofd/ofd_io.c
*
- * Author: Alex Tomas <bzzz@whamcloud.com>
+ * This file provides functions to handle IO requests from clients and
+ * also LFSCK routines to check parent file identifier (PFID) consistency.
+ *
+ * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
+ * Author: Fan Yong <fan.yong@intel.com>
*/
#define DEBUG_SUBSYSTEM S_FILTER
+#include <linux/kthread.h>
#include "ofd_internal.h"
struct ofd_inconsistency_item {
struct lu_fid oii_pfid;
};
+/**
+ * Verify single object for parent FID consistency.
+ *
+ * Part of LFSCK processing which checks single object PFID stored in extended
+ * attribute (XATTR) against real FID of MDT parent object received by LFSCK.
+ * This verifies that the OST object is being referenced by only a single MDT
+ * object.
+ *
+ * \param[in] env execution environment
+ * \param[in] ofd OFD device
+ * \param[in] oii object-related local data
+ * \param[in] lr LFSCK request data
+ */
static void ofd_inconsistency_verify_one(const struct lu_env *env,
struct ofd_device *ofd,
struct ofd_inconsistency_item *oii,
lr->lr_fid2 = oii->oii_pfid; /* client given PFID. */
lr->lr_fid3 = *pfid; /* OST local stored PFID. */
- rc = lfsck_in_notify(env, ofd->ofd_osd, lr);
+ rc = lfsck_in_notify(env, ofd->ofd_osd, lr, NULL);
ofd_write_lock(env, fo);
switch (lr->lr_status) {
case LPVS_INIT:
", the old stored PFID "DFID"\n",
ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
PFID(&oii->oii_pfid), PFID(pfid));
- } else {
+ } else if (rc < 0) {
CDEBUG(D_LFSCK, "%s: fail to fix the OST PFID xattr "
"for "DFID", client given PFID "DFID", local "
"stored PFID "DFID": rc = %d\n",
OBD_FREE_PTR(oii);
}
+/**
+ * Verification thread to check parent FID consistency.
+ *
+ * Kernel thread to check consistency of parent FID for any
+ * new item added for checking by ofd_add_inconsistency_item().
+ *
+ * \param[in] args OFD device
+ *
+ * \retval 0 on successful thread termination
+ * \retval negative value if thread can't start
+ */
static int ofd_inconsistency_verification_main(void *args)
{
struct lu_env env;
OBD_ALLOC_PTR(lr);
if (unlikely(lr == NULL))
- GOTO(out, rc = -ENOMEM);
+ GOTO(out_unlocked, rc = -ENOMEM);
lr->lr_event = LE_PAIRS_VERIFY;
- lr->lr_active = LT_LAYOUT;
+ lr->lr_active = LFSCK_TYPE_LAYOUT;
spin_lock(&ofd->ofd_inconsistency_lock);
while (1) {
GOTO(out, rc = 0);
+out_unlocked:
+ spin_lock(&ofd->ofd_inconsistency_lock);
out:
thread_set_flags(thread, SVC_STOPPED);
wake_up_all(&thread->t_ctl_waitq);
return rc;
}
+/**
+ * Start parent FID verification thread.
+ *
+ * See ofd_inconsistency_verification_main().
+ *
+ * \param[in] ofd OFD device
+ *
+ * \retval 0 on successful start of thread
+ * \retval negative value on error
+ */
int ofd_start_inconsistency_verification_thread(struct ofd_device *ofd)
{
struct ptlrpc_thread *thread = &ofd->ofd_inconsistency_thread;
return rc;
}
+/**
+ * Stop parent FID verification thread.
+ *
+ * \param[in] ofd OFD device
+ *
+ * \retval 0 on successful start of thread
+ * \retval -EALREADY if thread is already stopped
+ */
int ofd_stop_inconsistency_verification_thread(struct ofd_device *ofd)
{
struct ptlrpc_thread *thread = &ofd->ofd_inconsistency_thread;
return 0;
}
+/**
+ * Add new item for parent FID verification.
+ *
+ * Prepare new verification item and pass it to the dedicated
+ * verification thread for further processing.
+ *
+ * \param[in] env execution environment
+ * \param[in] fo OFD object
+ * \param[in] oa OBDO structure with PFID
+ */
static void ofd_add_inconsistency_item(const struct lu_env *env,
struct ofd_object *fo, struct obdo *oa)
{
bool wakeup = false;
OBD_ALLOC_PTR(oii);
- if (oii == NULL) {
- CERROR("%s: cannot alloc memory for verify OST-object "
- "consistency for "DFID", client given PFID "DFID
- ", local stored PFID "DFID"\n",
- ofd_name(ofd), PFID(&fo->ofo_header.loh_fid),
- oa->o_parent_seq, oa->o_parent_oid, oa->o_stripe_idx,
- PFID(&fo->ofo_pfid));
-
+ if (oii == NULL)
return;
- }
INIT_LIST_HEAD(&oii->oii_list);
lu_object_get(&fo->ofo_obj.do_lu);
* inconsistency within the whole system. */
}
+/**
+ * Verify parent FID of an object.
+ *
+ * Check the parent FID is sane and start extended
+ * verification procedure otherwise.
+ *
+ * \param[in] env execution environment
+ * \param[in] fo OFD object
+ * \param[in] oa OBDO structure with PFID
+ *
+ * \retval 0 on successful verification
+ * \retval -EINPROGRESS if PFID is being repaired
+ * \retval -EPERM if PFID was verified but still insane
+ */
int ofd_verify_ff(const struct lu_env *env, struct ofd_object *fo,
struct obdo *oa)
{
RETURN(-EINPROGRESS);
}
+/**
+ * Prepare buffers for read request processing.
+ *
+ * This function converts remote buffers from client to local buffers
+ * and prepares the latter.
+ *
+ * \param[in] env execution environment
+ * \param[in] exp OBD export of client
+ * \param[in] ofd OFD device
+ * \param[in] fid FID of object
+ * \param[in] la object attributes
+ * \param[in] oa OBDO structure from client
+ * \param[in] niocount number of remote buffers
+ * \param[in] rnb remote buffers
+ * \param[in] nr_local number of local buffers
+ * \param[in] lnb local buffers
+ * \param[in] jobid job ID name
+ *
+ * \retval 0 on successful prepare
+ * \retval negative value on error
+ */
static int ofd_preprw_read(const struct lu_env *env, struct obd_export *exp,
struct ofd_device *ofd, const struct lu_fid *fid,
struct lu_attr *la, struct obdo *oa, int niocount,
GOTO(unlock, rc);
}
- /* parse remote buffers to local buffers and prepare the latter */
*nr_local = 0;
for (i = 0, j = 0; i < niocount; i++) {
rc = dt_bufs_get(env, ofd_object_child(fo), rnb + i,
- lnb + j, 0, ofd_object_capa(env, fo));
+ lnb + j, 0);
if (unlikely(rc < 0))
GOTO(buf_put, rc);
LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
}
LASSERT(*nr_local > 0 && *nr_local <= PTLRPC_MAX_BRW_PAGES);
- rc = dt_attr_get(env, ofd_object_child(fo), la,
- ofd_object_capa(env, fo));
+ rc = dt_attr_get(env, ofd_object_child(fo), la);
if (unlikely(rc))
GOTO(buf_put, rc);
return rc;
}
+/**
+ * Prepare buffers for write request processing.
+ *
+ * This function converts remote buffers from client to local buffers
+ * and prepares the latter. If there is recovery in progress and required
+ * object is missing then it can be re-created before write.
+ *
+ * \param[in] env execution environment
+ * \param[in] exp OBD export of client
+ * \param[in] ofd OFD device
+ * \param[in] fid FID of object
+ * \param[in] la object attributes
+ * \param[in] oa OBDO structure from client
+ * \param[in] objcount always 1
+ * \param[in] obj object data
+ * \param[in] rnb remote buffers
+ * \param[in] nr_local number of local buffers
+ * \param[in] lnb local buffers
+ * \param[in] jobid job ID name
+ *
+ * \retval 0 on successful prepare
+ * \retval negative value on error
+ */
static int ofd_preprw_write(const struct lu_env *env, struct obd_export *exp,
struct ofd_device *ofd, const struct lu_fid *fid,
struct lu_attr *la, struct obdo *oa,
LASSERT(objcount == 1);
if (unlikely(exp->exp_obd->obd_recovering)) {
- obd_seq seq = fid_seq(fid);
- obd_id oid = fid_oid(fid);
+ u64 seq = fid_seq(fid);
+ u64 oid = fid_oid(fid);
struct ofd_seq *oseq;
oseq = ofd_seq_load(env, ofd, seq);
}
while (diff > 0) {
- obd_id next_id = ofd_seq_last_oid(oseq) + 1;
+ u64 next_id = ofd_seq_last_oid(oseq) + 1;
int count = ofd_precreate_batch(ofd, diff);
rc = ofd_precreate_objects(env, ofd, next_id,
*nr_local = 0;
for (i = 0, j = 0; i < obj->ioo_bufcnt; i++) {
rc = dt_bufs_get(env, ofd_object_child(fo),
- rnb + i, lnb + j, 1,
- ofd_object_capa(env, fo));
+ rnb + i, lnb + j, 1);
if (unlikely(rc < 0))
GOTO(err, rc);
LASSERT(rc <= PTLRPC_MAX_BRW_PAGES);
lnb[j+k].lnb_flags = rnb[i].rnb_flags;
if (!(rnb[i].rnb_flags & OBD_BRW_GRANTED))
lnb[j+k].lnb_rc = -ENOSPC;
-
- /* remote client can't break through quota */
- if (exp_connect_rmtclient(exp))
- lnb[j+k].lnb_flags &= ~OBD_BRW_NOQUOTA;
}
j += rc;
*nr_local += rc;
err:
dt_bufs_put(env, ofd_object_child(fo), lnb, *nr_local);
ofd_read_unlock(env, fo);
+ ofd_object_put(env, fo);
/* ofd_grant_prepare_write() was called, so we must commit */
- ofd_grant_commit(env, exp, rc);
+ ofd_grant_commit(exp, oa->o_grant_used, rc);
out:
/* let's still process incoming grant information packed in the oa,
* but without enforcing grant since we won't proceed with the write.
return rc;
}
+/**
+ * Prepare bulk IO requests for processing.
+ *
+ * This function does initial checks of IO and calls corresponding
+ * functions for read/write processing.
+ *
+ * \param[in] env execution environment
+ * \param[in] cmd IO type (read/write)
+ * \param[in] exp OBD export of client
+ * \param[in] oa OBDO structure from request
+ * \param[in] objcount always 1
+ * \param[in] obj object data
+ * \param[in] rnb remote buffers
+ * \param[in] nr_local number of local buffers
+ * \param[in] lnb local buffers
+ *
+ * \retval 0 on successful prepare
+ * \retval negative value on error
+ */
int ofd_preprw(const struct lu_env *env, int cmd, struct obd_export *exp,
struct obdo *oa, int objcount, struct obd_ioobj *obj,
struct niobuf_remote *rnb, int *nr_local,
- struct niobuf_local *lnb, struct obd_trans_info *oti,
- struct lustre_capa *capa)
+ struct niobuf_local *lnb)
{
struct tgt_session_info *tsi = tgt_ses_info(env);
struct ofd_device *ofd = ofd_exp(exp);
}
if (tgt_ses_req(tsi) == NULL) { /* echo client case */
- LASSERT(oti != NULL);
info = ofd_info_init(env, exp);
- ofd_oti2info(info, oti);
jobid = NULL;
} else {
info = tsi2ofd_info(tsi);
LASSERT(oa != NULL);
- if (OBD_FAIL_CHECK(OBD_FAIL_OST_ENOENT)) {
+ if (OBD_FAIL_CHECK(OBD_FAIL_SRV_ENOENT)) {
struct ofd_seq *oseq;
oseq = ofd_seq_load(env, ofd, ostid_seq(&oa->o_oi));
LASSERT(obj->ioo_bufcnt > 0);
if (cmd == OBD_BRW_WRITE) {
- rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
- capa, CAPA_OPC_OSS_WRITE);
- if (rc == 0) {
- la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
- rc = ofd_preprw_write(env, exp, ofd, fid,
- &info->fti_attr, oa, objcount,
- obj, rnb, nr_local, lnb, jobid);
- }
+ la_from_obdo(&info->fti_attr, oa, OBD_MD_FLGETATTR);
+ rc = ofd_preprw_write(env, exp, ofd, fid, &info->fti_attr, oa,
+ objcount, obj, rnb, nr_local, lnb, jobid);
} else if (cmd == OBD_BRW_READ) {
- rc = ofd_auth_capa(exp, fid, ostid_seq(&oa->o_oi),
- capa, CAPA_OPC_OSS_READ);
- if (rc == 0) {
- ofd_grant_prepare_read(env, exp, oa);
- rc = ofd_preprw_read(env, exp, ofd, fid,
- &info->fti_attr, oa,
- obj->ioo_bufcnt, rnb, nr_local,
- lnb, jobid);
- obdo_from_la(oa, &info->fti_attr, LA_ATIME);
- }
+ ofd_grant_prepare_read(env, exp, oa);
+ rc = ofd_preprw_read(env, exp, ofd, fid, &info->fti_attr, oa,
+ obj->ioo_bufcnt, rnb, nr_local, lnb,
+ jobid);
+ obdo_from_la(oa, &info->fti_attr, LA_ATIME);
} else {
CERROR("%s: wrong cmd %d received!\n",
exp->exp_obd->obd_name, cmd);
RETURN(rc);
}
+/**
+ * Drop reference on local buffers for read bulk IO.
+ *
+ * This will free all local buffers use by this read request.
+ *
+ * \param[in] env execution environment
+ * \param[in] ofd OFD device
+ * \param[in] fid object FID
+ * \param[in] objcount always 1
+ * \param[in] niocount number of local buffers
+ * \param[in] lnb local buffers
+ *
+ * \retval 0 on successful execution
+ * \retval negative value on error
+ */
static int
ofd_commitrw_read(const struct lu_env *env, struct ofd_device *ofd,
const struct lu_fid *fid, int objcount, int niocount,
RETURN(0);
}
+/**
+ * Set attributes of object during write bulk IO processing.
+ *
+ * Change object attributes and write parent FID into extended
+ * attributes when needed.
+ *
+ * \param[in] env execution environment
+ * \param[in] ofd OFD device
+ * \param[in] ofd_obj OFD object
+ * \param[in] la object attributes
+ * \param[in] ff parent FID
+ *
+ * \retval 0 on successful attributes update
+ * \retval negative value on error
+ */
static int
ofd_write_attr_set(const struct lu_env *env, struct ofd_device *ofd,
struct ofd_object *ofd_obj, struct lu_attr *la,
/* set uid/gid */
if (la->la_valid) {
- rc = dt_attr_set(env, dt_obj, la, th,
- ofd_object_capa(env, ofd_obj));
+ rc = dt_attr_set(env, dt_obj, la, th);
if (rc)
GOTO(out_tx, rc);
}
GOTO(out_tx, rc);
rc = dt_xattr_set(env, dt_obj, &info->fti_buf, XATTR_NAME_FID,
- 0, th, BYPASS_CAPA);
+ 0, th);
if (rc == 0) {
ofd_obj->ofo_pfid.f_seq = le64_to_cpu(ff->ff_parent.f_seq);
ofd_obj->ofo_pfid.f_oid = le32_to_cpu(ff->ff_parent.f_oid);
struct obd_export *ossc_exp;
};
+/**
+ * Callback function for "soft sync" update.
+ *
+ * Reset fed_soft_sync_count upon committing the "soft_sync" update.
+ * See ofd_soft_sync_cb_add() below for more details on soft sync.
+ *
+ * \param[in] env execution environment
+ * \param[in] th transaction handle
+ * \param[in] cb callback data
+ * \param[in] err error code
+ */
static void ofd_cb_soft_sync(struct lu_env *env, struct thandle *th,
struct dt_txn_commit_cb *cb, int err)
{
OBD_FREE_PTR(ossc);
}
+/**
+ * Add callback for "soft sync" processing.
+ *
+ * The "soft sync" mechanism does asynchronous commit when OBD_BRW_SOFT_SYNC
+ * flag is set in client buffers. The intention is for this operation to
+ * commit pages belonging to a client which has "too many" outstanding
+ * unstable pages in its cache. See LU-2139 for details.
+ *
+ * This function adds callback to be called when commit is done.
+ *
+ * \param[in] th transaction handle
+ * \param[in] exp OBD export of client
+ *
+ * \retval 0 on successful callback adding
+ * \retval negative value on error
+ */
static int ofd_soft_sync_cb_add(struct thandle *th, struct obd_export *exp)
{
struct ofd_soft_sync_callback *ossc;
dcb = &ossc->ossc_cb;
dcb->dcb_func = ofd_cb_soft_sync;
- CFS_INIT_LIST_HEAD(&dcb->dcb_linkage);
+ INIT_LIST_HEAD(&dcb->dcb_linkage);
strlcpy(dcb->dcb_name, "ofd_cb_soft_sync", sizeof(dcb->dcb_name));
rc = dt_trans_cb_add(th, dcb);
return rc;
}
+/**
+ * Commit bulk IO buffers to the storage.
+ *
+ * This function finalizes write IO processing by writing data to the disk.
+ * That write can be synchronous or asynchronous depending on buffers flags.
+ *
+ * \param[in] env execution environment
+ * \param[in] exp OBD export of client
+ * \param[in] ofd OFD device
+ * \param[in] fid FID of object
+ * \param[in] la object attributes
+ * \param[in] ff parent FID of object
+ * \param[in] objcount always 1
+ * \param[in] niocount number of local buffers
+ * \param[in] lnb local buffers
+ * \param[in] granted grant space consumed for the bulk I/O
+ * \param[in] old_rc result of processing at this point
+ *
+ * \retval 0 on successful commit
+ * \retval negative value on error
+ */
static int
ofd_commitrw_write(const struct lu_env *env, struct obd_export *exp,
struct ofd_device *ofd, const struct lu_fid *fid,
struct lu_attr *la, struct filter_fid *ff, int objcount,
- int niocount, struct niobuf_local *lnb, int old_rc)
+ int niocount, struct niobuf_local *lnb,
+ unsigned long granted, int old_rc)
{
- struct ofd_thread_info *info = ofd_info(env);
- struct ofd_object *fo;
- struct dt_object *o;
- struct thandle *th;
- int rc = 0;
- int retries = 0;
- int i;
struct filter_export_data *fed = &exp->exp_filter_data;
- bool soft_sync = false;
- bool cb_registered = false;
+ struct ofd_object *fo;
+ struct dt_object *o;
+ struct thandle *th;
+ int rc = 0;
+ int retries = 0;
+ int i;
+ bool soft_sync = false;
+ bool cb_registered = false;
+ bool fake_write = false;
ENTRY;
la->la_valid &= LA_ATIME | LA_MTIME | LA_CTIME;
+ /* do fake write, to simulate the write case for performance testing */
+ if (OBD_FAIL_CHECK(OBD_FAIL_OST_FAKE_WRITE)) {
+ struct niobuf_local *last = &lnb[niocount - 1];
+ __u64 file_size = last->lnb_file_offset + last->lnb_len;
+ __u64 valid = la->la_valid;
+
+ la->la_valid = LA_SIZE;
+ la->la_size = 0;
+ rc = dt_attr_get(env, o, la);
+ if (rc < 0 && rc != -ENOENT)
+ GOTO(out, rc);
+
+ if (file_size < la->la_size)
+ file_size = la->la_size;
+
+ /* dirty inode by setting file size */
+ la->la_valid = valid | LA_SIZE;
+ la->la_size = file_size;
+
+ fake_write = true;
+ }
+
retry:
th = ofd_trans_create(env, ofd);
if (IS_ERR(th))
if (OBD_FAIL_CHECK(OBD_FAIL_OST_DQACQ_NET))
GOTO(out_stop, rc = -EINPROGRESS);
- rc = dt_declare_write_commit(env, o, lnb, niocount, th);
- if (rc)
- GOTO(out_stop, rc);
+ if (likely(!fake_write)) {
+ rc = dt_declare_write_commit(env, o, lnb, niocount, th);
+ if (rc)
+ GOTO(out_stop, rc);
+ }
if (la->la_valid) {
/* update [mac]time if needed */
if (rc)
GOTO(out_stop, rc);
- rc = dt_write_commit(env, o, lnb, niocount, th);
- if (rc)
- GOTO(out_stop, rc);
+ if (likely(!fake_write)) {
+ rc = dt_write_commit(env, o, lnb, niocount, th);
+ if (rc)
+ GOTO(out_stop, rc);
+ }
if (la->la_valid) {
- rc = dt_attr_set(env, o, la, th, ofd_object_capa(env, fo));
+ rc = dt_attr_set(env, o, la, th);
if (rc)
GOTO(out_stop, rc);
}
/* get attr to return */
- rc = dt_attr_get(env, o, la, ofd_object_capa(env, fo));
+ rc = dt_attr_get(env, o, la);
out_stop:
/* Force commit to make the just-deleted blocks
cb_registered = true;
}
+ if (rc == 0 && granted > 0) {
+ if (ofd_grant_commit_cb_add(th, exp, granted) == 0)
+ granted = 0;
+ }
+
ofd_trans_stop(env, ofd, th, rc);
if (rc == -ENOSPC && retries++ < 3) {
CDEBUG(D_INODE, "retry after force commit, retries:%d\n",
ofd_object_put(env, fo);
/* second put is pair to object_get in ofd_preprw_write */
ofd_object_put(env, fo);
- ofd_grant_commit(env, info->fti_exp, old_rc);
+ if (granted > 0)
+ ofd_grant_commit(exp, granted, old_rc);
RETURN(rc);
}
+/**
+ * Commit bulk IO to the storage.
+ *
+ * This is companion function to the ofd_preprw(). It finishes bulk IO
+ * request processing by committing buffers to the storage (WRITE) and/or
+ * freeing those buffers (read/write). See ofd_commitrw_read() and
+ * ofd_commitrw_write() for details about each type of IO.
+ *
+ * \param[in] env execution environment
+ * \param[in] cmd IO type (READ/WRITE)
+ * \param[in] exp OBD export of client
+ * \param[in] oa OBDO structure from client
+ * \param[in] objcount always 1
+ * \param[in] obj object data
+ * \param[in] rnb remote buffers
+ * \param[in] npages number of local buffers
+ * \param[in] lnb local buffers
+ * \param[in] old_rc result of processing at this point
+ *
+ * \retval 0 on successful commit
+ * \retval negative value on error
+ */
int ofd_commitrw(const struct lu_env *env, int cmd, struct obd_export *exp,
struct obdo *oa, int objcount, struct obd_ioobj *obj,
struct niobuf_remote *rnb, int npages,
- struct niobuf_local *lnb, struct obd_trans_info *oti,
- int old_rc)
+ struct niobuf_local *lnb, int old_rc)
{
struct ofd_thread_info *info = ofd_info(env);
struct ofd_mod_data *fmd;
}
rc = ofd_commitrw_write(env, exp, ofd, fid, &info->fti_attr,
- ff, objcount, npages, lnb, old_rc);
+ ff, objcount, npages, lnb,
+ oa->o_grant_used, old_rc);
if (rc == 0)
obdo_from_la(oa, &info->fti_attr,
OFD_VALID_FLAGS | LA_GID | LA_UID);
rs = ldlm_resource_get(ns, NULL, &info->fti_resid,
LDLM_EXTENT, 0);
if (!IS_ERR(rs)) {
- ns->ns_lvbo->lvbo_update(rs, NULL, 1);
+ ldlm_res_lvbo_update(rs, NULL, 1);
ldlm_resource_putref(rs);
}
}
rc = -EPROTO;
}
- if (oti != NULL)
- ofd_info2oti(info, oti);
RETURN(rc);
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff