1. The critical section does not prevent task scheduling
2. If the critical section is in sched_lock, there is no need to check,
scheduling is not going to happen
3. If sched_lock is in the critical section, sched_unlock will also
trigger scheduling without waiting for the exit of the critical section
4. After exiting the critical section, if there is an interrupt,
the scheduling will be automatically triggered
Signed-off-by: hujun5 <hujun5@xiaomi.com>
Notes:
1. This version of NAT66 is a stateful one like NAT44, corresponding to Linux's MASQUERADE target of ip6tables. We can support stateless NAT66 & NPTv6 later by slightly modify the address & port selection logic (maybe just match the rules and skip the entry find).
2. We're using same flag `IFF_NAT` for both NAT44 & NAT66 to make control easier. Which means, if we enable NAT, both NAT44 & NAT66 will be enabled. If we don't want one of them, we can just disable that one in Kconfig.
3. Maybe we can accelerate the checksum adjustment by pre-calculate a difference of checksum, and apply it to each packet, instead of calling `net_chksum_adjust` each time. Just a thought, maybe do it later.
4. IP fragment segments on NAT66 connections are not supported yet.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
To prepare for future IPv6 NAT functions.
- Rename common ipv4_nat_xxx to nat_xxx
- Move some common definitions into header
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
Using CSR name depends on compiler support heavily, but CSR
encoding does not have this problem. It also make it easy to
add new CSR support even if the compiler does not support.
Unify CSR access by using the CSR encoding macro.
Signed-off-by: Inochi Amaoto <inochiama@outlook.com>
This patch adds more debug related CSR definitions
to arch/risc-v/include/csr.h.
These definitions are from the RISC-V Debug Specification
Version 1.0 rc1 (https://github.com/riscv/riscv-debug-spec).
Signed-off-by: Huang Qi <huangqi3@xiaomi.com>
In order to ensure the detached thread obtain the correct return
value from pthread_join()/pthread_cancel(), the detached thread
will create joininfo to save the detached status after thread
destroyed. If there are too many of detached threads in the
process group, the joininfo will consume too much memory.
This is not friendly to embedded MCU devices.
This commit keep the semantics as #11898 was introduced,
will no longer save joininfo for detached threads to avoid wasting memory.
Signed-off-by: chao an <anchao@lixiang.com>
Because CAN is a broadcast protocol, each conn needs to be given independent data to avoid mutual interference.
Signed-off-by: zhanghongyu <zhanghongyu@xiaomi.com>
====================================================================================
Cmake in present: qemu-armv8a/nsh_smp
Configuration/Tool: qemu-armv8a/nsh_smp
------------------------------------------------------------------------------------
Cleaning...
Configuring...
Building NuttX...
On branch master
Your branch is up to date with 'origin/master'.
Changes not staged for commit:
(use "git add <file>..." to update what will be committed)
(use "git restore <file>..." to discard changes in working directory)
modified: boards/arm64/qemu/qemu-armv8a/configs/nsh_smp/defconfig
no changes added to commit (use "git add" and/or "git commit -a")
Signed-off-by: chenrun1 <chenrun1@xiaomi.com>
The symmetric NAT limits one external port to be used with only one peer ip:port.
Note:
1. To avoid using too much #ifdef, we're always passing peer_ip and peer_port as arguments, but won't use them under full cone NAT, let the compiler optimize them.
2. We need to find port binding without peer ip:port, so don't add peer ip:port into hash key.
3. Symmetric NAT needs to *select another external port if a port is used by any other NAT entry*, this behavior is exactly same as Full Cone NAT, so we don't need to change anything related to `ipv4_nat_port_inuse`.
Signed-off-by: Zhe Weng <wengzhe@xiaomi.com>
Extracting global variable information using scripts:
kasan_global.py:
1. Extract the global variable information provided by the -- param asan globals=1 option
2. Generate shadow regions for global variable out of bounds detection
Makefile:
1. Implement multiple links, embed the shadow area into the program, and call it by the Kasan module
Signed-off-by: W-M-R <mike_0528@163.com>
