/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
+ *
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
+ *
+ * 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.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#ifndef __OBD_H
#include <lustre/lustre_idl.h>
#include <lu_object.h>
+#include <lu_ref.h>
#include <lustre_lib.h>
#include <lustre_export.h>
#include <lustre_quota.h>
struct osc_async_rc {
int ar_rc;
int ar_force_sync;
- int ar_min_xid;
+ __u64 ar_min_xid;
};
struct lov_oinfo { /* per-stripe data structure */
struct osc_async_rc loi_ar;
};
+static inline void loi_kms_set(struct lov_oinfo *oinfo, __u64 kms)
+{
+ oinfo->loi_kms = kms;
+ oinfo->loi_kms_valid = 1;
+}
+
static inline void loi_init(struct lov_oinfo *loi)
{
CFS_INIT_LIST_HEAD(&loi->loi_read_lop.lop_pending);
struct lov_stripe_md {
spinlock_t lsm_lock;
- void *lsm_lock_owner; /* debugging */
+ pid_t lsm_lock_owner; /* debugging */
struct {
/* Public members. */
__u32 lw_stripe_size; /* size of the stripe */
__u32 lw_pattern; /* striping pattern (RAID0, RAID1) */
unsigned lw_stripe_count; /* number of objects being striped over */
+ char lw_pool_name[LOV_MAXPOOLNAME]; /* pool name */
} lsm_wire;
struct lov_array_info *lsm_array; /*Only for joined file array info*/
#define lsm_stripe_size lsm_wire.lw_stripe_size
#define lsm_pattern lsm_wire.lw_pattern
#define lsm_stripe_count lsm_wire.lw_stripe_count
+#define lsm_pool_name lsm_wire.lw_pool_name
struct obd_info;
struct lustre_quota_ctxt obt_qctxt;
};
+typedef void (*obd_pin_extent_cb)(void *data);
+typedef int (*obd_page_removal_cb_t)(void *data, int discard);
+typedef int (*obd_lock_cancel_cb)(struct ldlm_lock *,struct ldlm_lock_desc *,
+ void *, int);
+
/* llog contexts */
enum llog_ctxt_id {
LLOG_CONFIG_ORIG_CTXT = 0,
obd_size fo_tot_pending;
obd_size fo_readcache_max_filesize;
+ int fo_read_cache;
+ int fo_writethrough_cache;
struct obd_import *fo_mdc_imp;
struct obd_uuid fo_mdc_uuid;
unsigned int fo_fl_oss_capa;
struct list_head fo_capa_keys;
struct hlist_head *fo_capa_hash;
-
- void *fo_lcm;
+ struct llog_commit_master *fo_lcm;
};
#define OSC_MAX_RIF_DEFAULT 8
struct mdc_rpc_lock;
struct obd_import;
+struct lustre_cache;
struct client_obd {
- struct semaphore cl_sem;
+ struct rw_semaphore cl_sem;
struct obd_uuid cl_target_uuid;
struct obd_import *cl_import; /* ptlrpc connection state */
int cl_conn_count;
__u32 cl_supp_cksum_types;
/* checksum algorithm to be used */
cksum_type_t cl_cksum_type;
-
+
/* also protected by the poorly named _loi_list_lock lock above */
struct osc_async_rc cl_ar;
struct lu_client_seq *cl_seq;
atomic_t cl_resends; /* resend count */
+
+ /* Cache of triples */
+ struct lustre_cache *cl_cache;
+ obd_lock_cancel_cb cl_ext_lock_cancel_cb;
};
#define obd2cli_tgt(obd) ((char *)(obd)->u.cli.cl_target_uuid.uuid)
/* for capability keys update */
struct lustre_capa_key *mds_capa_keys;
+ struct rw_semaphore mds_notify_lock;
};
/* lov objid */
unsigned int ltq_usable:1; /* usable for striping */
};
+/* Generic subset of OSTs */
+struct ost_pool {
+ __u32 *op_array; /* array of index of
+ lov_obd->lov_tgts */
+ unsigned int op_count; /* number of OSTs in the array */
+ unsigned int op_size; /* allocated size of lp_array */
+ rwlock_t op_rwlock; /* to protect lov_pool use */
+};
+
+/* Round-robin allocator data */
+struct lov_qos_rr {
+ __u32 lqr_start_idx; /* start index of new inode */
+ __u32 lqr_offset_idx; /* aliasing for start_idx */
+ int lqr_start_count; /* reseed counter */
+ struct ost_pool lqr_pool; /* round-robin optimized list */
+ unsigned long lqr_dirty:1; /* recalc round-robin list */
+};
+
+/* Stripe placement optimization */
struct lov_qos {
struct list_head lq_oss_list; /* list of OSSs that targets use */
struct rw_semaphore lq_rw_sem;
__u32 lq_active_oss_count;
- __u32 *lq_rr_array; /* round-robin optimized list */
- unsigned int lq_rr_size; /* rr array size */
unsigned int lq_prio_free; /* priority for free space */
+ struct lov_qos_rr lq_rr; /* round robin qos data */
unsigned long lq_dirty:1, /* recalc qos data */
- lq_dirty_rr:1, /* recalc round-robin list */
lq_same_space:1,/* the ost's all have approx.
the same space avail */
lq_reset:1; /* zero current penalties */
ltd_reap:1; /* should this target be deleted */
};
+/* Pool metadata */
+#define pool_tgt_size(_p) _p->pool_obds.op_size
+#define pool_tgt_count(_p) _p->pool_obds.op_count
+#define pool_tgt_array(_p) _p->pool_obds.op_array
+#define pool_tgt_rwlock(_p) _p->pool_obds.op_rwlock
+#define pool_tgt(_p, _i) _p->pool_lov->lov_tgts[_p->pool_obds.op_array[_i]]
+
+struct pool_desc {
+ char pool_name[LOV_MAXPOOLNAME + 1]; /* name of pool */
+ struct ost_pool pool_obds; /* pool members */
+ struct lov_qos_rr pool_rr; /* round robin qos */
+ struct hlist_node pool_hash; /* access by poolname */
+ struct list_head pool_list; /* serial access */
+ cfs_proc_dir_entry_t *pool_proc_entry; /* file in /proc */
+ struct lov_obd *pool_lov; /* lov obd to which this
+ pool belong */
+};
+
struct lov_obd {
struct lov_desc desc;
- struct lov_tgt_desc **lov_tgts;
+ struct lov_tgt_desc **lov_tgts; /* sparse array */
+ struct ost_pool lov_packed; /* all OSTs in a packed
+ array */
struct semaphore lov_lock;
struct obd_connect_data lov_ocd;
struct lov_qos lov_qos; /* qos info per lov */
__u32 lov_active_tgt_count; /* how many active */
__u32 lov_death_row;/* tgts scheduled to be deleted */
__u32 lov_tgt_size; /* size of tgts array */
- __u32 lov_start_idx; /* start index of new inode */
- __u32 lov_offset_idx; /* aliasing for start_idx */
- int lov_start_count;/* reseed counter */
int lov_connects;
+ obd_page_removal_cb_t lov_page_removal_cb;
+ obd_pin_extent_cb lov_page_pin_cb;
+ obd_lock_cancel_cb lov_lock_cancel_cb;
+ int lov_pool_count;
+ lustre_hash_t *lov_pools_hash_body; /* used for key access */
+ struct list_head lov_pool_list; /* used for sequential access */
+ cfs_proc_dir_entry_t *lov_pool_proc_entry;
};
struct lmv_tgt_desc {
struct semaphore ltd_fid_sem;
};
+enum placement_policy {
+ PLACEMENT_CHAR_POLICY = 0,
+ PLACEMENT_NID_POLICY = 1,
+ PLACEMENT_INVAL_POLICY = 2,
+ PLACEMENT_MAX_POLICY
+};
+
+typedef enum placement_policy placement_policy_t;
+
struct lmv_obd {
int refcount;
struct lu_client_fld lmv_fld;
spinlock_t lmv_lock;
+ placement_policy_t lmv_placement;
struct lmv_desc desc;
struct obd_uuid cluuid;
struct obd_export *exp;
/* initial thread handling transaction */
int oti_thread_id;
__u32 oti_conn_cnt;
+
+ struct obd_uuid *oti_ost_uuid;
};
static inline void oti_init(struct obd_trans_info *oti,
struct completion trd_finishing;
};
-#define OBD_LLOG_GROUP 0
-
enum filter_groups {
FILTER_GROUP_LLOG = 1,
FILTER_GROUP_ECHO,
cfs_waitq_t olg_waitq;
spinlock_t olg_lock;
struct obd_export *olg_exp;
+ int olg_initializing;
+ struct semaphore olg_cat_processing;
};
/* corresponds to one of the obd's */
obd_inactive:1; /* device active/inactive
* (for /proc/status only!!) */
/* uuid-export hash body */
- struct lustre_class_hash_body *obd_uuid_hash_body;
+ struct lustre_hash *obd_uuid_hash;
/* nid-export hash body */
- struct lustre_class_hash_body *obd_nid_hash_body;
- atomic_t obd_refcount;
+ struct lustre_hash *obd_nid_hash;
+ /* nid stats body */
+ struct lustre_hash *obd_nid_stats_hash;
+ struct list_head obd_nid_stats;
+ atomic_t obd_refcount;
cfs_waitq_t obd_refcount_waitq;
struct list_head obd_exports;
int obd_num_exports;
+ spinlock_t obd_nid_lock;
struct ldlm_namespace *obd_namespace;
struct ptlrpc_client obd_ldlm_client; /* XXX OST/MDS only */
/* a spinlock is OK for what we do now, may need a semaphore later */
/* XXX encapsulate all this recovery data into one struct */
svc_handler_t obd_recovery_handler;
pid_t obd_processing_task;
-
+
int obd_max_recoverable_clients;
int obd_connected_clients;
int obd_recoverable_clients;
spinlock_t obd_uncommitted_replies_lock;
cfs_timer_t obd_recovery_timer;
time_t obd_recovery_start; /* seconds */
- time_t obd_recovery_end; /* seconds */
+ time_t obd_recovery_end; /* seconds, for lprocfs_status */
time_t obd_recovery_max_time; /* seconds, bz13079 */
-
+ int obd_recovery_timeout;
+
/* new recovery stuff from CMD2 */
struct target_recovery_data obd_recovery_data;
int obd_replayed_locks;
struct lprocfs_stats *md_stats;
cfs_proc_dir_entry_t *obd_proc_entry;
- cfs_proc_dir_entry_t *obd_proc_exports;
+ cfs_proc_dir_entry_t *obd_proc_exports_entry;
cfs_proc_dir_entry_t *obd_svc_procroot;
struct lprocfs_stats *obd_svc_stats;
- struct semaphore obd_proc_exp_sem;
atomic_t obd_evict_inprogress;
cfs_waitq_t obd_evict_inprogress_waitq;
+
+ /**
+ * Ldlm pool part. Save last calculated SLV and Limit.
+ */
+ rwlock_t obd_pool_lock;
+ int obd_pool_limit;
+ __u64 obd_pool_slv;
+
+ /**
+ * A list of outstanding class_incref()'s against this obd. For
+ * debugging.
+ */
+ struct lu_ref obd_reference;
};
#define OBD_OPT_FORCE 0x0001
enum obd_cleanup_stage {
/* Special case hack for MDS LOVs */
OBD_CLEANUP_EARLY,
-/* Precleanup stage 1, we must make sure all exports (other than the
- self-export) get destroyed. */
+/* can be directly mapped to .ldto_device_fini() */
OBD_CLEANUP_EXPORTS,
-/* Precleanup stage 2, do other type-specific cleanup requiring the
- self-export. */
- OBD_CLEANUP_SELF_EXP,
-/* FIXME we should eliminate the "precleanup" function and make them stages
- of the "cleanup" function. */
- OBD_CLEANUP_OBD,
};
/* get/set_info keys */
#define KEY_REVIMP_UPD "revimp_update"
#define KEY_LOV_IDX "lov_idx"
#define KEY_LAST_ID "last_id"
+#define KEY_READONLY "read-only"
#define KEY_LOCK_TO_STRIPE "lock_to_stripe"
+#define KEY_CHECKSUM "checksum"
+#define KEY_UNLINKED "unlinked"
+#define KEY_EVICT_BY_NID "evict_by_nid"
+#define KEY_REGISTER_TARGET "register_target"
+#define KEY_SET_FS "set_fs"
+#define KEY_CLEAR_FS "clear_fs"
#define KEY_BLOCKSIZE "blocksize"
#define KEY_BLOCKSIZE_BITS "blocksize_bits"
+#define KEY_FIEMAP "FIEMAP"
+/* XXX unused ?*/
+#define KEY_INTERMDS "inter_mds"
+#define KEY_ASYNC "async"
struct lu_context;
+static inline int it_to_lock_mode(struct lookup_intent *it)
+{
+ /* CREAT needs to be tested before open (both could be set) */
+ if (it->it_op & IT_CREAT)
+ return LCK_CW;
+ else if (it->it_op & (IT_READDIR | IT_GETATTR | IT_OPEN | IT_LOOKUP))
+ return LCK_CR;
+
+ LASSERTF(0, "Invalid it_op: %d\n", it->it_op);
+ return -EINVAL;
+}
+
struct md_op_data {
struct lu_fid op_fid1; /* operation fid1 (usualy parent) */
struct lu_fid op_fid2; /* operation fid2 (usualy child) */
__u32 op_suppgids[2];
__u32 op_fsuid;
__u32 op_fsgid;
- __u32 op_cap;
+ cfs_cap_t op_cap;
void *op_data;
/* iattr fields and blocks. */
__u32 op_opc;
};
+struct md_enqueue_info;
+/* metadata stat-ahead */
+typedef int (* md_enqueue_cb_t)(struct ptlrpc_request *req,
+ struct md_enqueue_info *minfo,
+ int rc);
+
+struct md_enqueue_info {
+ struct md_op_data mi_data;
+ struct lookup_intent mi_it;
+ struct lustre_handle mi_lockh;
+ struct dentry *mi_dentry;
+ md_enqueue_cb_t mi_cb;
+ unsigned int mi_generation;
+ void *mi_cbdata;
+};
+
struct obd_ops {
struct module *o_owner;
int (*o_iocontrol)(unsigned int cmd, struct obd_export *exp, int len,
void *karg, void *uarg);
int (*o_get_info)(struct obd_export *, __u32 keylen, void *key,
- __u32 *vallen, void *val);
+ __u32 *vallen, void *val, struct lov_stripe_md *lsm);
int (*o_set_info_async)(struct obd_export *, __u32 keylen, void *key,
__u32 vallen, void *val,
struct ptlrpc_request_set *set);
* asked for. If @ocd == NULL, use default parameters. */
int (*o_connect)(const struct lu_env *env,
struct lustre_handle *conn, struct obd_device *src,
- struct obd_uuid *cluuid, struct obd_connect_data *ocd);
+ struct obd_uuid *cluuid, struct obd_connect_data *ocd,
+ void *localdata);
int (*o_reconnect)(const struct lu_env *env,
struct obd_export *exp, struct obd_device *src,
struct obd_uuid *cluuid,
- struct obd_connect_data *ocd);
+ struct obd_connect_data *ocd,
+ void *localdata);
int (*o_disconnect)(struct obd_export *exp);
/* Initialize/finalize fids infrastructure. */
int (*o_fid_alloc)(struct obd_export *exp, struct lu_fid *fid,
struct md_op_data *op_data);
- /*
+ /*
* Object with @fid is getting deleted, we may want to do something
* about this.
*/
struct lov_oinfo *loi,
cfs_page_t *page, obd_off offset,
struct obd_async_page_ops *ops, void *data,
- void **res);
+ void **res, int nocache,
+ struct lustre_handle *lockh);
+ int (*o_reget_short_lock)(struct obd_export *exp,
+ struct lov_stripe_md *lsm,
+ void **res, int rw,
+ obd_off start, obd_off end,
+ void **cookie);
+ int (*o_release_short_lock)(struct obd_export *exp,
+ struct lov_stripe_md *lsm, obd_off end,
+ void *cookie, int rw);
int (*o_queue_async_io)(struct obd_export *exp,
struct lov_stripe_md *lsm,
struct lov_oinfo *loi, void *cookie,
obd_id *startid, obd_gr group, void *data);
int (*o_preprw)(int cmd, struct obd_export *exp, struct obdo *oa,
int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_remote *remote,
- struct niobuf_local *local, struct obd_trans_info *oti,
+ struct niobuf_remote *remote, int *nr_pages,
+ struct niobuf_local *local,
+ struct obd_trans_info *oti,
struct lustre_capa *capa);
int (*o_commitrw)(int cmd, struct obd_export *exp, struct obdo *oa,
int objcount, struct obd_ioobj *obj,
- int niocount, struct niobuf_local *local,
+ struct niobuf_remote *remote, int pages,
+ struct niobuf_local *local,
struct obd_trans_info *oti, int rc);
int (*o_enqueue)(struct obd_export *, struct obd_info *oinfo,
struct ldlm_enqueue_info *einfo,
__u32 mode, struct lustre_handle *);
int (*o_cancel_unused)(struct obd_export *, struct lov_stripe_md *,
int flags, void *opaque);
- int (*o_join_lru)(struct obd_export *, struct lov_stripe_md *,
- int join);
int (*o_init_export)(struct obd_export *exp);
int (*o_destroy_export)(struct obd_export *exp);
int (*o_extent_calc)(struct obd_export *, struct lov_stripe_md *,
int cmd, obd_off *);
/* llog related obd_methods */
- int (*o_llog_init)(struct obd_device *obd, int group,
+ int (*o_llog_init)(struct obd_device *obd, struct obd_llog_group *grp,
struct obd_device *disk_obd, int count,
struct llog_catid *logid, struct obd_uuid *uuid);
int (*o_llog_finish)(struct obd_device *obd, int count);
enum obd_notify_event ev, void *data);
int (*o_health_check)(struct obd_device *);
+ struct obd_uuid *(*o_get_uuid) (struct obd_export *exp);
/* quota methods */
int (*o_quotacheck)(struct obd_export *, struct obd_quotactl *);
int (*o_quotactl)(struct obd_export *, struct obd_quotactl *);
int (*o_ping)(struct obd_export *exp);
+
+ int (*o_register_page_removal_cb)(struct obd_export *exp,
+ obd_page_removal_cb_t cb,
+ obd_pin_extent_cb pin_cb);
+ int (*o_unregister_page_removal_cb)(struct obd_export *exp,
+ obd_page_removal_cb_t cb);
+ int (*o_register_lock_cancel_cb)(struct obd_export *exp,
+ obd_lock_cancel_cb cb);
+ int (*o_unregister_lock_cancel_cb)(struct obd_export *exp,
+ obd_lock_cancel_cb cb);
+ /* pools methods */
+ int (*o_pool_new)(struct obd_device *obd, char *poolname);
+ int (*o_pool_del)(struct obd_device *obd, char *poolname);
+ int (*o_pool_add)(struct obd_device *obd, char *poolname,
+ char *ostname);
+ int (*o_pool_rem)(struct obd_device *obd, char *poolname,
+ char *ostname);
/*
* NOTE: If adding ops, add another LPROCFS_OBD_OP_INIT() line
* to lprocfs_alloc_obd_stats() in obdclass/lprocfs_status.c.
#define MAX_HASH_SIZE_32 0x7fffffffUL
#define MAX_HASH_SIZE 0x7fffffffffffffffULL
-#define MAX_HASH_HIGHEST_BIT 0x1000000000000000
+#define MAX_HASH_HIGHEST_BIT 0x1000000000000000ULL
struct lustre_md {
struct mdt_body *body;
int (*m_close)(struct obd_export *, struct md_op_data *,
struct md_open_data *, struct ptlrpc_request **);
int (*m_create)(struct obd_export *, struct md_op_data *,
- const void *, int, int, __u32, __u32, __u32,
+ const void *, int, int, __u32, __u32, cfs_cap_t,
__u64, struct ptlrpc_request **);
int (*m_done_writing)(struct obd_export *, struct md_op_data *,
struct md_open_data *);
int (*m_enqueue)(struct obd_export *, struct ldlm_enqueue_info *,
struct lookup_intent *, struct md_op_data *,
- struct lustre_handle *, void *, int, int);
+ struct lustre_handle *, void *, int,
+ struct ptlrpc_request **, int);
int (*m_getattr)(struct obd_export *, const struct lu_fid *,
struct obd_capa *, obd_valid, int,
struct ptlrpc_request **);
struct obd_capa *, __u32,
struct ptlrpc_request **);
+ int (*m_intent_getattr_async)(struct obd_export *,
+ struct md_enqueue_info *,
+ struct ldlm_enqueue_info *);
+
+ int (*m_revalidate_lock)(struct obd_export *,
+ struct lookup_intent *,
+ struct lu_fid *);
+
/*
* NOTE: If adding ops, add another LPROCFS_MD_OP_INIT() line to
* lprocfs_alloc_md_stats() in obdclass/lprocfs_status.c. Also, add a
struct lov_mds_md *lmm);
};
-extern struct lsm_operations lsm_plain_ops;
-extern struct lsm_operations lsm_join_ops;
-static inline struct lsm_operations *lsm_op_find(int magic)
+extern const struct lsm_operations lsm_v1_ops;
+extern const struct lsm_operations lsm_join_ops;
+extern const struct lsm_operations lsm_v3_ops;
+static inline const struct lsm_operations *lsm_op_find(int magic)
{
switch(magic) {
- case LOV_MAGIC:
- return &lsm_plain_ops;
+ case LOV_MAGIC_V1:
+ return &lsm_v1_ops;
case LOV_MAGIC_JOIN:
return &lsm_join_ops;
+ case LOV_MAGIC_V3:
+ return &lsm_v3_ops;
default:
CERROR("Cannot recognize lsm_magic %d\n", magic);
return NULL;
int error)
{
if (error) {
- CERROR("%s: transno "LPD64" commit error: %d\n",
+ CERROR("%s: transno "LPU64" commit error: %d\n",
obd->obd_name, transno, error);
return;
}
- CDEBUG(D_HA, "%s: transno "LPD64" committed\n",
- obd->obd_name, transno);
if (transno > obd->obd_last_committed) {
+ CDEBUG(D_HA, "%s: transno "LPD64" committed\n",
+ obd->obd_name, transno);
obd->obd_last_committed = transno;
ptlrpc_commit_replies (obd);
+ } else {
+ CDEBUG(D_INFO, "%s: transno "LPD64" committed\n",
+ obd->obd_name, transno);
}
}
return oinfo->oi_capa;
}
-/*
- * Checksums
- */
-
-#ifdef HAVE_ADLER
-/* Default preferred checksum algorithm to use (if supported by the server) */
-#define OSC_DEFAULT_CKSUM OBD_CKSUM_ADLER
-/* Adler-32 is supported */
-#define CHECKSUM_ADLER OBD_CKSUM_ADLER
-#else
-#define OSC_DEFAULT_CKSUM OBD_CKSUM_CRC32
-#define CHECKSUM_ADLER 0
-#endif
-
-#define OBD_CKSUM_ALL (OBD_CKSUM_CRC32 | CHECKSUM_ADLER)
-
-/* Checksum algorithm names. Must be defined in the same order as the
- * OBD_CKSUM_* flags. */
-#define DECLARE_CKSUM_NAME char *cksum_name[] = {"crc32", "adler"}
-
#endif /* __OBD_H */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff