#ifndef __INCLUDE_RTE_ETH_SOFTNIC_INTERNALS_H__
#define __INCLUDE_RTE_ETH_SOFTNIC_INTERNALS_H__
+#include <stddef.h>
#include <stdint.h>
+#include <sys/queue.h>
+#include <rte_mempool.h>
#include <rte_mbuf.h>
+#include <rte_ring.h>
+#include <rte_ethdev.h>
#include <rte_sched.h>
+#include <rte_port_in_action.h>
+#include <rte_table_action.h>
+#include <rte_pipeline.h>
+
#include <rte_ethdev_driver.h>
#include <rte_tm_driver.h>
#include "rte_eth_softnic.h"
+#include "conn.h"
+
+#define NAME_SIZE 64
/**
* PMD Parameters
*/
-enum pmd_feature {
- PMD_FEATURE_TM = 1, /**< Traffic Management (TM) */
-};
-
-#ifndef INTRUSIVE
-#define INTRUSIVE 0
-#endif
-
struct pmd_params {
- /** Parameters for the soft device (to be created) */
- struct {
- const char *name; /**< Name */
- uint32_t flags; /**< Flags */
+ const char *name;
+ const char *firmware;
+ uint16_t conn_port;
+ uint32_t cpu_id;
- /** 0 = Access hard device though API only (potentially slower,
- * but safer);
- * 1 = Access hard device private data structures is allowed
- * (potentially faster).
- */
- int intrusive;
+ /** Traffic Management (TM) */
+ struct {
+ uint32_t n_queues; /**< Number of queues */
+ uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
+ } tm;
+};
- /** Traffic Management (TM) */
- struct {
- uint32_t rate; /**< Rate (bytes/second) */
- uint32_t nb_queues; /**< Number of queues */
- uint16_t qsize[RTE_SCHED_TRAFFIC_CLASSES_PER_PIPE];
- /**< Queue size per traffic class */
- uint32_t enq_bsz; /**< Enqueue burst size */
- uint32_t deq_bsz; /**< Dequeue burst size */
- } tm;
- } soft;
+/**
+ * MEMPOOL
+ */
+struct softnic_mempool_params {
+ uint32_t buffer_size;
+ uint32_t pool_size;
+ uint32_t cache_size;
+};
- /** Parameters for the hard device (existing) */
- struct {
- char *name; /**< Name */
- uint16_t tx_queue_id; /**< TX queue ID */
- } hard;
+struct softnic_mempool {
+ TAILQ_ENTRY(softnic_mempool) node;
+ char name[NAME_SIZE];
+ struct rte_mempool *m;
+ uint32_t buffer_size;
};
+TAILQ_HEAD(softnic_mempool_list, softnic_mempool);
+
/**
- * Default Internals
+ * SWQ
*/
+struct softnic_swq_params {
+ uint32_t size;
+};
-#ifndef DEFAULT_BURST_SIZE
-#define DEFAULT_BURST_SIZE 32
-#endif
+struct softnic_swq {
+ TAILQ_ENTRY(softnic_swq) node;
+ char name[NAME_SIZE];
+ struct rte_ring *r;
+};
-#ifndef FLUSH_COUNT_THRESHOLD
-#define FLUSH_COUNT_THRESHOLD (1 << 17)
-#endif
+TAILQ_HEAD(softnic_swq_list, softnic_swq);
+
+/**
+ * LINK
+ */
+struct softnic_link_params {
+ const char *dev_name;
+ uint16_t port_id; /**< Valid only when *dev_name* is NULL. */
+};
-struct default_internals {
- struct rte_mbuf **pkts;
- uint32_t pkts_len;
- uint32_t txq_pos;
- uint32_t flush_count;
+struct softnic_link {
+ TAILQ_ENTRY(softnic_link) node;
+ char name[NAME_SIZE];
+ uint16_t port_id;
+ uint32_t n_rxq;
+ uint32_t n_txq;
};
+TAILQ_HEAD(softnic_link_list, softnic_link);
+
/**
- * Traffic Management (TM) Internals
+ * TMGR
*/
#ifndef TM_MAX_SUBPORTS
/** Blueprints */
struct tm_params params;
+};
+
+struct softnic_tmgr_port {
+ TAILQ_ENTRY(softnic_tmgr_port) node;
+ char name[NAME_SIZE];
+ struct rte_sched_port *s;
+};
+
+TAILQ_HEAD(softnic_tmgr_port_list, softnic_tmgr_port);
+
+/**
+ * TAP
+ */
+struct softnic_tap {
+ TAILQ_ENTRY(softnic_tap) node;
+ char name[NAME_SIZE];
+ int fd;
+};
+
+TAILQ_HEAD(softnic_tap_list, softnic_tap);
+
+/**
+ * Input port action
+ */
+struct softnic_port_in_action_profile_params {
+ uint64_t action_mask;
+ struct rte_port_in_action_fltr_config fltr;
+ struct rte_port_in_action_lb_config lb;
+};
+
+struct softnic_port_in_action_profile {
+ TAILQ_ENTRY(softnic_port_in_action_profile) node;
+ char name[NAME_SIZE];
+ struct softnic_port_in_action_profile_params params;
+ struct rte_port_in_action_profile *ap;
+};
+
+TAILQ_HEAD(softnic_port_in_action_profile_list, softnic_port_in_action_profile);
+
+/**
+ * Table action
+ */
+struct softnic_table_action_profile_params {
+ uint64_t action_mask;
+ struct rte_table_action_common_config common;
+ struct rte_table_action_lb_config lb;
+ struct rte_table_action_mtr_config mtr;
+ struct rte_table_action_tm_config tm;
+ struct rte_table_action_encap_config encap;
+ struct rte_table_action_nat_config nat;
+ struct rte_table_action_ttl_config ttl;
+ struct rte_table_action_stats_config stats;
+};
+
+struct softnic_table_action_profile {
+ TAILQ_ENTRY(softnic_table_action_profile) node;
+ char name[NAME_SIZE];
+ struct softnic_table_action_profile_params params;
+ struct rte_table_action_profile *ap;
+};
+
+TAILQ_HEAD(softnic_table_action_profile_list, softnic_table_action_profile);
+
+/**
+ * Pipeline
+ */
+struct pipeline_params {
+ uint32_t timer_period_ms;
+ uint32_t offset_port_id;
+};
+
+enum softnic_port_in_type {
+ PORT_IN_RXQ,
+ PORT_IN_SWQ,
+ PORT_IN_TMGR,
+ PORT_IN_TAP,
+ PORT_IN_SOURCE,
+};
+
+struct softnic_port_in_params {
+ /* Read */
+ enum softnic_port_in_type type;
+ const char *dev_name;
+ union {
+ struct {
+ uint16_t queue_id;
+ } rxq;
+
+ struct {
+ const char *mempool_name;
+ uint32_t mtu;
+ } tap;
+
+ struct {
+ const char *mempool_name;
+ const char *file_name;
+ uint32_t n_bytes_per_pkt;
+ } source;
+ };
+ uint32_t burst_size;
+
+ /* Action */
+ const char *action_profile_name;
+};
+
+enum softnic_port_out_type {
+ PORT_OUT_TXQ,
+ PORT_OUT_SWQ,
+ PORT_OUT_TMGR,
+ PORT_OUT_TAP,
+ PORT_OUT_SINK,
+};
+
+struct softnic_port_out_params {
+ enum softnic_port_out_type type;
+ const char *dev_name;
+ union {
+ struct {
+ uint16_t queue_id;
+ } txq;
- /** Run-time */
- struct rte_sched_port *sched;
- struct rte_mbuf **pkts_enq;
- struct rte_mbuf **pkts_deq;
- uint32_t pkts_enq_len;
- uint32_t txq_pos;
- uint32_t flush_count;
+ struct {
+ const char *file_name;
+ uint32_t max_n_pkts;
+ } sink;
+ };
+ uint32_t burst_size;
+ int retry;
+ uint32_t n_retries;
+};
+
+enum softnic_table_type {
+ TABLE_ACL,
+ TABLE_ARRAY,
+ TABLE_HASH,
+ TABLE_LPM,
+ TABLE_STUB,
+};
+
+struct softnic_table_acl_params {
+ uint32_t n_rules;
+ uint32_t ip_header_offset;
+ int ip_version;
+};
+
+struct softnic_table_array_params {
+ uint32_t n_keys;
+ uint32_t key_offset;
+};
+
+struct softnic_table_hash_params {
+ uint32_t n_keys;
+ uint32_t key_offset;
+ uint32_t key_size;
+ uint8_t *key_mask;
+ uint32_t n_buckets;
+ int extendable_bucket;
+};
+
+struct softnic_table_lpm_params {
+ uint32_t n_rules;
+ uint32_t key_offset;
+ uint32_t key_size;
+};
+
+struct softnic_table_params {
+ /* Match */
+ enum softnic_table_type match_type;
+ union {
+ struct softnic_table_acl_params acl;
+ struct softnic_table_array_params array;
+ struct softnic_table_hash_params hash;
+ struct softnic_table_lpm_params lpm;
+ } match;
+
+ /* Action */
+ const char *action_profile_name;
+};
+
+struct softnic_port_in {
+ struct softnic_port_in_params params;
+ struct softnic_port_in_action_profile *ap;
+ struct rte_port_in_action *a;
+};
+
+struct softnic_table {
+ struct softnic_table_params params;
+ struct softnic_table_action_profile *ap;
+ struct rte_table_action *a;
};
+struct pipeline {
+ TAILQ_ENTRY(pipeline) node;
+ char name[NAME_SIZE];
+
+ struct rte_pipeline *p;
+ struct softnic_port_in port_in[RTE_PIPELINE_PORT_IN_MAX];
+ struct softnic_table table[RTE_PIPELINE_TABLE_MAX];
+ uint32_t n_ports_in;
+ uint32_t n_ports_out;
+ uint32_t n_tables;
+
+ struct rte_ring *msgq_req;
+ struct rte_ring *msgq_rsp;
+ uint32_t timer_period_ms;
+
+ int enabled;
+ uint32_t thread_id;
+ uint32_t cpu_id;
+};
+
+TAILQ_HEAD(pipeline_list, pipeline);
+
+/**
+ * Thread
+ */
+#ifndef THREAD_PIPELINES_MAX
+#define THREAD_PIPELINES_MAX 256
+#endif
+
+#ifndef THREAD_MSGQ_SIZE
+#define THREAD_MSGQ_SIZE 64
+#endif
+
+#ifndef THREAD_TIMER_PERIOD_MS
+#define THREAD_TIMER_PERIOD_MS 100
+#endif
+
+/**
+ * Master thead: data plane thread context
+ */
+struct softnic_thread {
+ struct rte_ring *msgq_req;
+ struct rte_ring *msgq_rsp;
+
+ uint32_t enabled;
+};
+
+/**
+ * Data plane threads: context
+ */
+#ifndef TABLE_RULE_ACTION_SIZE_MAX
+#define TABLE_RULE_ACTION_SIZE_MAX 2048
+#endif
+
+struct softnic_table_data {
+ struct rte_table_action *a;
+};
+
+struct pipeline_data {
+ struct rte_pipeline *p;
+ struct softnic_table_data table_data[RTE_PIPELINE_TABLE_MAX];
+ uint32_t n_tables;
+
+ struct rte_ring *msgq_req;
+ struct rte_ring *msgq_rsp;
+ uint64_t timer_period; /* Measured in CPU cycles. */
+ uint64_t time_next;
+
+ uint8_t buffer[TABLE_RULE_ACTION_SIZE_MAX];
+};
+
+struct softnic_thread_data {
+ struct rte_pipeline *p[THREAD_PIPELINES_MAX];
+ uint32_t n_pipelines;
+
+ struct pipeline_data pipeline_data[THREAD_PIPELINES_MAX];
+ struct rte_ring *msgq_req;
+ struct rte_ring *msgq_rsp;
+ uint64_t timer_period; /* Measured in CPU cycles. */
+ uint64_t time_next;
+ uint64_t time_next_min;
+ uint64_t iter;
+} __rte_cache_aligned;
+
/**
* PMD Internals
*/
/** Params */
struct pmd_params params;
- /** Soft device */
struct {
- struct default_internals def; /**< Default */
struct tm_internals tm; /**< Traffic Management */
} soft;
- /** Hard device */
- struct {
- uint16_t port_id;
- } hard;
-};
-
-struct pmd_rx_queue {
- /** Hard device */
- struct {
- uint16_t port_id;
- uint16_t rx_queue_id;
- } hard;
+ struct softnic_conn *conn;
+ struct softnic_mempool_list mempool_list;
+ struct softnic_swq_list swq_list;
+ struct softnic_link_list link_list;
+ struct softnic_tmgr_port_list tmgr_port_list;
+ struct softnic_tap_list tap_list;
+ struct softnic_port_in_action_profile_list port_in_action_profile_list;
+ struct softnic_table_action_profile_list table_action_profile_list;
+ struct pipeline_list pipeline_list;
+ struct softnic_thread thread[RTE_MAX_LCORE];
+ struct softnic_thread_data thread_data[RTE_MAX_LCORE];
};
/**
- * Traffic Management (TM) Operation
+ * MEMPOOL
*/
-extern const struct rte_tm_ops pmd_tm_ops;
+int
+softnic_mempool_init(struct pmd_internals *p);
+
+void
+softnic_mempool_free(struct pmd_internals *p);
+
+struct softnic_mempool *
+softnic_mempool_find(struct pmd_internals *p,
+ const char *name);
+struct softnic_mempool *
+softnic_mempool_create(struct pmd_internals *p,
+ const char *name,
+ struct softnic_mempool_params *params);
+
+/**
+ * SWQ
+ */
int
-tm_params_check(struct pmd_params *params, uint32_t hard_rate);
+softnic_swq_init(struct pmd_internals *p);
+
+void
+softnic_swq_free(struct pmd_internals *p);
+
+void
+softnic_softnic_swq_free_keep_rxq_txq(struct pmd_internals *p);
+
+struct softnic_swq *
+softnic_swq_find(struct pmd_internals *p,
+ const char *name);
+struct softnic_swq *
+softnic_swq_create(struct pmd_internals *p,
+ const char *name,
+ struct softnic_swq_params *params);
+
+/**
+ * LINK
+ */
int
-tm_init(struct pmd_internals *p, struct pmd_params *params, int numa_node);
+softnic_link_init(struct pmd_internals *p);
void
-tm_free(struct pmd_internals *p);
+softnic_link_free(struct pmd_internals *p);
+
+struct softnic_link *
+softnic_link_find(struct pmd_internals *p,
+ const char *name);
+
+struct softnic_link *
+softnic_link_create(struct pmd_internals *p,
+ const char *name,
+ struct softnic_link_params *params);
+/**
+ * TMGR
+ */
int
-tm_start(struct pmd_internals *p);
+softnic_tmgr_init(struct pmd_internals *p);
void
-tm_stop(struct pmd_internals *p);
+softnic_tmgr_free(struct pmd_internals *p);
-static inline int
-tm_enabled(struct rte_eth_dev *dev)
-{
- struct pmd_internals *p = dev->data->dev_private;
+struct softnic_tmgr_port *
+softnic_tmgr_port_find(struct pmd_internals *p,
+ const char *name);
- return (p->params.soft.flags & PMD_FEATURE_TM);
-}
+struct softnic_tmgr_port *
+softnic_tmgr_port_create(struct pmd_internals *p,
+ const char *name);
+
+void
+tm_hierarchy_init(struct pmd_internals *p);
+
+void
+tm_hierarchy_free(struct pmd_internals *p);
static inline int
tm_used(struct rte_eth_dev *dev)
{
struct pmd_internals *p = dev->data->dev_private;
- return (p->params.soft.flags & PMD_FEATURE_TM) &&
- p->soft.tm.h.n_tm_nodes[TM_NODE_LEVEL_PORT];
+ return p->soft.tm.h.n_tm_nodes[TM_NODE_LEVEL_PORT];
}
+extern const struct rte_tm_ops pmd_tm_ops;
+
+/**
+ * TAP
+ */
+int
+softnic_tap_init(struct pmd_internals *p);
+
+void
+softnic_tap_free(struct pmd_internals *p);
+
+struct softnic_tap *
+softnic_tap_find(struct pmd_internals *p,
+ const char *name);
+
+struct softnic_tap *
+softnic_tap_create(struct pmd_internals *p,
+ const char *name);
+
+/**
+ * Input port action
+ */
+int
+softnic_port_in_action_profile_init(struct pmd_internals *p);
+
+void
+softnic_port_in_action_profile_free(struct pmd_internals *p);
+
+struct softnic_port_in_action_profile *
+softnic_port_in_action_profile_find(struct pmd_internals *p,
+ const char *name);
+
+struct softnic_port_in_action_profile *
+softnic_port_in_action_profile_create(struct pmd_internals *p,
+ const char *name,
+ struct softnic_port_in_action_profile_params *params);
+
+/**
+ * Table action
+ */
+int
+softnic_table_action_profile_init(struct pmd_internals *p);
+
+void
+softnic_table_action_profile_free(struct pmd_internals *p);
+
+struct softnic_table_action_profile *
+softnic_table_action_profile_find(struct pmd_internals *p,
+ const char *name);
+
+struct softnic_table_action_profile *
+softnic_table_action_profile_create(struct pmd_internals *p,
+ const char *name,
+ struct softnic_table_action_profile_params *params);
+
+/**
+ * Pipeline
+ */
+int
+softnic_pipeline_init(struct pmd_internals *p);
+
+void
+softnic_pipeline_free(struct pmd_internals *p);
+
+void
+softnic_pipeline_disable_all(struct pmd_internals *p);
+
+struct pipeline *
+softnic_pipeline_find(struct pmd_internals *p, const char *name);
+
+struct pipeline *
+softnic_pipeline_create(struct pmd_internals *p,
+ const char *name,
+ struct pipeline_params *params);
+
+int
+softnic_pipeline_port_in_create(struct pmd_internals *p,
+ const char *pipeline_name,
+ struct softnic_port_in_params *params,
+ int enabled);
+
+int
+softnic_pipeline_port_in_connect_to_table(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t port_id,
+ uint32_t table_id);
+
+int
+softnic_pipeline_port_out_create(struct pmd_internals *p,
+ const char *pipeline_name,
+ struct softnic_port_out_params *params);
+
+int
+softnic_pipeline_table_create(struct pmd_internals *p,
+ const char *pipeline_name,
+ struct softnic_table_params *params);
+
+struct softnic_table_rule_match_acl {
+ int ip_version;
+
+ RTE_STD_C11
+ union {
+ struct {
+ uint32_t sa;
+ uint32_t da;
+ } ipv4;
+
+ struct {
+ uint8_t sa[16];
+ uint8_t da[16];
+ } ipv6;
+ };
+
+ uint32_t sa_depth;
+ uint32_t da_depth;
+ uint16_t sp0;
+ uint16_t sp1;
+ uint16_t dp0;
+ uint16_t dp1;
+ uint8_t proto;
+ uint8_t proto_mask;
+ uint32_t priority;
+};
+
+struct softnic_table_rule_match_array {
+ uint32_t pos;
+};
+
+#ifndef TABLE_RULE_MATCH_SIZE_MAX
+#define TABLE_RULE_MATCH_SIZE_MAX 256
+#endif
+
+struct softnic_table_rule_match_hash {
+ uint8_t key[TABLE_RULE_MATCH_SIZE_MAX];
+};
+
+struct softnic_table_rule_match_lpm {
+ int ip_version;
+
+ RTE_STD_C11
+ union {
+ uint32_t ipv4;
+ uint8_t ipv6[16];
+ };
+
+ uint8_t depth;
+};
+
+struct softnic_table_rule_match {
+ enum softnic_table_type match_type;
+
+ union {
+ struct softnic_table_rule_match_acl acl;
+ struct softnic_table_rule_match_array array;
+ struct softnic_table_rule_match_hash hash;
+ struct softnic_table_rule_match_lpm lpm;
+ } match;
+};
+
+struct softnic_table_rule_action {
+ uint64_t action_mask;
+ struct rte_table_action_fwd_params fwd;
+ struct rte_table_action_lb_params lb;
+ struct rte_table_action_mtr_params mtr;
+ struct rte_table_action_tm_params tm;
+ struct rte_table_action_encap_params encap;
+ struct rte_table_action_nat_params nat;
+ struct rte_table_action_ttl_params ttl;
+ struct rte_table_action_stats_params stats;
+ struct rte_table_action_time_params time;
+};
+
+int
+softnic_pipeline_port_in_stats_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t port_id,
+ struct rte_pipeline_port_in_stats *stats,
+ int clear);
+
+int
+softnic_pipeline_port_in_enable(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t port_id);
+
+int
+softnic_pipeline_port_in_disable(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t port_id);
+
+int
+softnic_pipeline_port_out_stats_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t port_id,
+ struct rte_pipeline_port_out_stats *stats,
+ int clear);
+
+int
+softnic_pipeline_table_stats_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ struct rte_pipeline_table_stats *stats,
+ int clear);
+
+int
+softnic_pipeline_table_rule_add(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ struct softnic_table_rule_match *match,
+ struct softnic_table_rule_action *action,
+ void **data);
+
+int
+softnic_pipeline_table_rule_add_bulk(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ struct softnic_table_rule_match *match,
+ struct softnic_table_rule_action *action,
+ void **data,
+ uint32_t *n_rules);
+
+int
+softnic_pipeline_table_rule_add_default(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ struct softnic_table_rule_action *action,
+ void **data);
+
+int
+softnic_pipeline_table_rule_delete(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ struct softnic_table_rule_match *match);
+
+int
+softnic_pipeline_table_rule_delete_default(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id);
+
+int
+softnic_pipeline_table_rule_stats_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ void *data,
+ struct rte_table_action_stats_counters *stats,
+ int clear);
+
+int
+softnic_pipeline_table_mtr_profile_add(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ uint32_t meter_profile_id,
+ struct rte_table_action_meter_profile *profile);
+
+int
+softnic_pipeline_table_mtr_profile_delete(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ uint32_t meter_profile_id);
+
+int
+softnic_pipeline_table_rule_mtr_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ void *data,
+ uint32_t tc_mask,
+ struct rte_table_action_mtr_counters *stats,
+ int clear);
+
+int
+softnic_pipeline_table_dscp_table_update(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ uint64_t dscp_mask,
+ struct rte_table_action_dscp_table *dscp_table);
+
+int
+softnic_pipeline_table_rule_ttl_read(struct pmd_internals *p,
+ const char *pipeline_name,
+ uint32_t table_id,
+ void *data,
+ struct rte_table_action_ttl_counters *stats,
+ int clear);
+
+/**
+ * Thread
+ */
+int
+softnic_thread_init(struct pmd_internals *p);
+
+void
+softnic_thread_free(struct pmd_internals *p);
+
+int
+softnic_thread_pipeline_enable(struct pmd_internals *p,
+ uint32_t thread_id,
+ const char *pipeline_name);
+
+int
+softnic_thread_pipeline_disable(struct pmd_internals *p,
+ uint32_t thread_id,
+ const char *pipeline_name);
+
+/**
+ * CLI
+ */
+void
+softnic_cli_process(char *in,
+ char *out,
+ size_t out_size,
+ void *arg);
+
+int
+softnic_cli_script_process(struct pmd_internals *softnic,
+ const char *file_name,
+ size_t msg_in_len_max,
+ size_t msg_out_len_max);
+
#endif /* __INCLUDE_RTE_ETH_SOFTNIC_INTERNALS_H__ */
Code Review / deb_dpdk.git / blobdiff