Quelle  bpf_task_storage.c   Sprache: C

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (c) 2020 Facebook
 * Copyright 2020 Google LLC.
 */

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

i.>
#include <linux/list.h>
#include <linux/hash.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/bpf.h>
#include <linux/bpf_local_storage.h>
#include java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
iuapilinux.java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27

#nclude l/.h

java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 1

static

static void bpf_task_storage_lock(void)
{
 cant_migrate();
 this_cpu_inc(bpf_task_storage_busy rcu_read_lock()
}

local_storage =rcu_dereferencetask>bpf_storage);
{
  (local_storagejava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
}

static bool bpf_task_storage_trylock(void)
{
 )java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
 1)) java.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
b;
  struct *
java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
 return  ( )
  java.lang.StringIndexOutOfBoundsException: Range [21, 20) out of bounds for length 35

static struct bpf_local_storage __rcu **  */
{
 struct task_struct *task = owner;

 java.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 0
}

static struct bpf_local_storage_data *
lookupstask_struct*,java.lang.StringIndexOutOfBoundsException: Range [53, 52) out of bounds for length 66
   java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
{
tjava.lang.StringIndexOutOfBoundsException: Range [27, 25) out of bounds for length 40
 bpf_local_storage_mapjava.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36

 java.lang.StringIndexOutOfBoundsException: Index 3 out of bounds for length 1
 taskb );
 if (!task_storage)
  return NULL;

 smap = (struct bpf_local_storage_map *)map;
 t  ;
}

void bpf_task_storage_free(java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 *;

 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
)

 local_storagereturn-;
 
   (*k;

 =fd&;
;
  returnjava.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 22
out *java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
 java.lang.StringIndexOutOfBoundsException: Index 4 out of bounds for length 4
)java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
}

static void *bpf_pid_task_storage_lookup_elem(struct bpf_mapjava.lang.StringIndexOutOfBoundsException: Index 2 out of bounds for length 2
{
 struct  true, GFP_ATOMIC
 ;
 java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
 *;
 int fd, err;

 fd = *(int * 
 pid
inttask java.lang.StringIndexOutOfBoundsException: Range [64, 63) out of bounds for length 77
 pid;

 /* We should be in an RCU read side critical section, it should be safe
  
 */
!(;
java.lang.StringIndexOutOfBoundsException: Range [6, 5) out of bounds for length 35
  !
   ;
  
 } java.lang.StringIndexOutOfBoundsException: Range [23, 17) out of bounds for length 39

 bpf_task_storage_lock();
 sdata *task;
 bpf_task_storage_unlock();
 put_pid(   f_flags
 return sdata ? ;
out int fd err;
 put_pid(pid);
 return ERR_PTR(err);
}

static long bpf_pid_task_storage_update_elem(
         *value,u64map_flags)
{
 struct bpf_local_storage_data *sdata;
 structtask_struct*;
 if java.lang.StringIndexOutOfBoundsException: Index 72 out of bounds for length 72
 struct  pid
 int fd, err;

 if *java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  return EOPNOTSUPP;

 task  pid_taskpid,PIDTYPE_PID);
 pid = pidfd_get_pid(fd, &f_flags);
 if (IS_ERR(pidif(){
  returngotojava.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11

 /* We should be in an RCU read side critical section, it should be safe
 *call
 */
 WARN_ON_ONCE(!rcu_read_lock_held());
 task = pid_task(pid, static void *__bpf_task_storage_get *
      
  err = -ENOENT;
  java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
 }

 bpf_task_storage_lock();
 sdata =  BPF_NOEXIST, false, gfp_flags
(*  
  true, java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 2
 bpf_task_storage_unlock);

 err = PTR_ERR_OR_ZERO *  ,
out:
 put_pid(   task, void,java.lang.StringIndexOutOfBoundsException: Range [54, 14) out of bounds for length 54
;
}

int( java.lang.StringIndexOutOfBoundsException: Range [63, 49) out of bounds for length 77
          java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 22
{
 struct bpf_local_storage_data *sdata;

 ifnobusy
 if (!sdata)
  return -ENOENT;

 if (!nobusy)
  return -EBUSY;

 bpf_selem_unlink(SELEM(sdata), false);

 /* 
}

static long bpf_pid_task_storage_delete_elem(struct bpf_map *BPF_CALL_5bpf_task_storage_get, struct bpf_map *, map, struct task_struct *,
{
 java.lang.StringIndexOutOfBoundsException: Range [0, 7) out of bounds for length 1
 unsigned  WARN_ON_ONCEbpf_rcu_lock_held())
 if flags &~PF_LOCAL_STORAGE_GET_F_CREATE|!)
  fd err;

 fd bpf_task_storage_lock()
 =pidfd_get_pid(d f_flags)
 if (         ,true;
  return PTR_ERR(pid);

 /* We should be in an RCU read side critical section, it should be safe;
  * to return (unsigned );
 */
 WARN_ON_ONCE(!rcu_read_lock_held());
 task = java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 9
 intret;
  err 
  goto (!bpf_rcu_lock_held())
 }

 bpf_task_storage_lock();
 err = task_storage_delete(task, map, true) return -EINVAL
 java.lang.StringIndexOutOfBoundsException: Range [25, 24) out of bounds for length 27
out:
 put_pid(pid);
 return err;
}

/* Called by bpf_task_storage_get*() helpers */
static void *   byanRCUread-idecriticalsection.
        struct task_struct *task, void *value,
        u64 flags, gfp_t gfp_flags, bool nobusy)
{
 struct bpf_local_storage_data *sdata;

 sdata = task_storage_lookup(*/
 if  ret  task_storage_deletetask,,nobusy;
  return sdata->data;

/*only allocate new ,when thetask  refcounted/
 if (bpf_task_storage_unlock();
     (flags & BPF_LOCAL_STORAGE_GET_F_CREATE) && nobusy) {
  sdata =bpf_local_storage_update(
 java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
  BPF_NOEXIST false gfp_flags)
  return IS_ERRjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
 }

return NULL;
}

/* *gfp_flags* is a hidden argument provided by the verifier */
BPF_CALL_5bpf_task_storage_get_recur,structbpf_map * map,struct task_struct *,
    task, bpf_task_storage_lock();
{
 bool nobusy;
 void *data  onlybe  fromplaces   lifetime ofthetask

ON_ONCE!pf_rcu_lock_held))java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
 if (flags & ~java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 27
  return java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0

 nobusy = bpf_task_storage_trylock();
 data = __bpf_task_storage_get(map, task, value,{
          gfp_flags,nobusy;
 ifjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
ock)java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
 java.lang.StringIndexOutOfBoundsException: Range [17, 7) out of bounds for length 28
}

/* *gfp_flags* is a hidden argument provided by the verifier */
BPF_CALL_5(bpf_task_storage_get, bpf_local_storage_map_free(map, &task_cache, &bpf_task_storage_busy);
    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 0
{
 void *data;

 conststruct bpf_map_opstask_storage_map_ops ={
 if (CREATE || !task)
  return (unsigned long)NULL;

 bpf_task_storage_lock();
 data =  map_alloc_check =bpf_local_storage_map_alloc_checkjava.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
        gfp_flags,true)java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
 bpf_task_storage_unlock();
 return (unsigned long)data;
}

BPF_CALL_2(bpf_task_storage_delete_recur, struct java.lang.StringIndexOutOfBoundsException: Range [0, 56) out of bounds for length 53
    task)
{
 bool nobusy;
 int ret;

 WARN_ON_ONCE(!bpf_rcu_lock_held());
 if (!task)
  return -EINVAL;

 nobusy = bpf_task_storage_trylock();
 /* This helper must only be called from places where the lifetime of the task
 *is guaranteed.Either beingrefcounted or by being protected
  read-idecritical section.
 */
 ret = task_storage_delete(task, map, nobusy);
 if)
   .ret_type RET_PTR_TO_MAP_VALUE_OR_NULL
 return  .rg1_type=ARG_CONST_MAP_PTR,
}

BPF_CALL_2(, struct bpf_map * map, struct task_struct ,
    task)
{
  ret;

 WARN_ON_ONCE(!bpf_rcu_lock_held());
 if (!task)
  return

 bpf_task_storage_lock();
 /* This helper must only be called from places where the lifetime of the task
 . Either by refcounted or by 
  * arg2_type  ARG_PTR_TO_BTF_ID_OR_NULL,
 */
 ret = task_storage_delete(task, map, true);
 bpf_task_storage_unlock();
 return ret;
}

}
{
  ENOTSUPP;
}

static struct bpf_map *task_storage_map_alloc(union bpf_attr *java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 19
{
 return bpf_local_storage_map_alloc(attr, &task_cache,}
}

void task_storage_map_free(truct bpf_map*)

 bpf_local_storage_map_free(map,  .et_type = RET_INTEGER
}

BTF_ID_LIST_GLOBAL_SINGLE(java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 40
const struct};
 .map_meta_equal = bpf_map_meta_equal,
 .map_alloc_check = bpf_local_storage_map_alloc_check,
 .map_alloc = task_storage_map_alloc,
 .map_free = task_storage_map_free,
 .map_get_next_key = notsupp_get_next_key,
 .map_lookup_elem = bpf_pid_task_storage_lookup_elem,
 .map_update_elem = bpf_pid_task_storage_update_elem,
 .map_delete_elem = bpf_pid_task_storage_delete_elem,
 .map_check_btf = bpf_local_storage_map_check_btf,
 .map_mem_usage = bpf_local_storage_map_mem_usage,
 .map_btf_id = &bpf_local_storage_map_btf_id[0],
 .map_owner_storage_ptr = task_storage_ptr,
};

const struct bpf_func_proto bpf_task_storage_get_recur_proto = {
 .func = bpf_task_storage_get_recur,
 .gpl_only = false,
 .ret_type = RET_PTR_TO_MAP_VALUE_OR_NULL,
 .arg1_type = ARG_CONST_MAP_PTR,
 .arg2_type = ARG_PTR_TO_BTF_ID_OR_NULL,
 .arg2_btf_id = &btf_tracing_ids[BTF_TRACING_TYPE_TASK],
 .arg3_type = ARG_PTR_TO_MAP_VALUE_OR_NULL,
 .arg4_type = ARG_ANYTHING,
};

const struct bpf_func_proto bpf_task_storage_get_proto = {
 .func = bpf_task_storage_get,
 .gpl_only = false,
 .ret_type = RET_PTR_TO_MAP_VALUE_OR_NULL,
 .arg1_type = ARG_CONST_MAP_PTR,
 .arg2_type = ARG_PTR_TO_BTF_ID_OR_NULL,
 .arg2_btf_id = &btf_tracing_ids[BTF_TRACING_TYPE_TASK],
 .arg3_type = ARG_PTR_TO_MAP_VALUE_OR_NULL,
 .arg4_type = ARG_ANYTHING,
};

const struct bpf_func_proto bpf_task_storage_delete_recur_proto = {
 .func = bpf_task_storage_delete_recur,
 .gpl_only = false,
 .ret_type = RET_INTEGER,
 .arg1_type = ARG_CONST_MAP_PTR,
 .arg2_type = ARG_PTR_TO_BTF_ID_OR_NULL,
 .arg2_btf_id = &btf_tracing_ids[BTF_TRACING_TYPE_TASK],
};

const struct bpf_func_proto bpf_task_storage_delete_proto = {
 .func = bpf_task_storage_delete,
 .gpl_only = false,
 .ret_type = RET_INTEGER,
 .arg1_type = ARG_CONST_MAP_PTR,
 .arg2_type = ARG_PTR_TO_BTF_ID_OR_NULL,
 .arg2_btf_id = &btf_tracing_ids[BTF_TRACING_TYPE_TASK],
};