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2020-08-12Fixing issues found by static analyzer.Max Romanov1-2/+4
2020-08-11Fixing return value initialization.Max Romanov1-19/+25
2020-08-11Style fixes for 2 file descriptors transfer over port.Max Romanov7-110/+115
Two consecutive fd and fd2 fields replaced with array.
2020-08-11Moving file descriptor blocking to libunit.Max Romanov3-19/+39
The default libunit behavior relies on blocking the recv() call for port file descriptors, which an application may override if needed. For external applications, port file descriptors were toggled to blocking mode before the exec() call. If the exec() call failed, descriptor remained blocked, so the process hanged while trying to read from it. This patch moves file descriptor mode switch inside libunit.
2020-08-11Wrapping close() call in libunit for logging.Max Romanov1-35/+44
2020-08-11Introducing application and port shared memory queues.Max Romanov11-311/+1793
The goal is to minimize the number of syscalls needed to deliver a message.
2020-08-11Circular queues implementations and a test.Max Romanov3-0/+886
- naive circular queue, described in the article "A Scalable, Portable, and Memory-Efficient Lock-Free FIFO Queue" by Ruslan Nikolaev: https://drops.dagstuhl.de/opus/volltexte/2019/11335/pdf/LIPIcs-DISC-2019-28.pdf - circular queue, proposed by Valentin Bartenev in the "Unit router application IPC" design draft
2020-08-11Port message extended to transfer 2 file descriptors.Max Romanov5-27/+81
2020-08-11Made router port message handlers into static functions.Max Romanov2-10/+13
Mostly harmless.
2020-08-11Adding debug messages to catch process management issues.Max Romanov1-2/+36
2020-08-11Process structures refactoring in runtime and libunit.Max Romanov4-208/+93
Generic process-to-process shared memory exchange is no more required. Here, it is transformed into a router-to-application pattern. The outgoing shared memory segments collection is now the property of the application structure. The applications connect to the router only, and the process only needs to group the ports.
2020-08-11Introducing the shared application port.Max Romanov9-1226/+876
This is the port shared between all application processes which use it to pass requests for processing. Using it significantly simplifies the request processing code in the router. The drawback is 2 more file descriptors per each configured application and more complex libunit message wait/read code.
2020-08-11Changing router to application shared memory exchange protocol.Max Romanov8-179/+374
The application process needs to request the shared memory segment from the router instead of the latter pushing the segment before sending a request to the application. This is required to simplify the communication between the router and the application and to prepare the router for using the application shared port and then the queue.
2020-08-11Changing router to application port exchange protocol.Max Romanov7-97/+342
The application process needs to request the port from the router instead of the latter pushing the port before sending a request to the application. This is required to simplify the communication between the router and the application and to prepare the router to use the application shared port and then the queue.
2020-08-11Adding a reference counter to the libunit port structure.Max Romanov2-351/+340
The goal is to minimize the number of (pid, id) to port hash lookups which require a library mutex lock. The response port is found once per request, while the read port is initialized at startup.
2020-08-11Libunit refactoring: port management.Max Romanov7-330/+372
- Changed the port management callbacks to notifications, which e. g. avoids the need to call the libunit function - Added context and library instance reference counts for a safer resource release - Added the router main port initialization
2020-08-09Fixing leaked configuration objects.Max Romanov1-4/+30
If there are no listen sockets, the router configuration usage counter remains 0 and never decreases. The only moment to release a configuration is right after a configuration update.
2020-08-09Fixing connection remote sockaddr leakage.Max Romanov1-2/+4
Earlier patch 1bf971f83571 fixes connection leakage. But connection free requires separate remote sockaddr release.
2020-08-07Node.js: correct port data memory release.Max Romanov1-1/+15
According to libuv documentation, uv_poll_t memory should be released in a callback function passed to uv_close(). Otherwise, the Node.js application process may crash at exit.
2020-08-07Fixing listen event connection leakage.Max Romanov1-0/+4
A connection object is allocated in advance for each listen event object to be used for the established connection. This connection needs to be freed when the listen event is destroyed.
2020-08-05Improved mkstemp() error reporting.Valentin Bartenev1-1/+1
The invocation parameters should be logged as well, notably the path of the file that is failed to be created. Also, log level changed to ALERT as it's quite critical error.
2020-08-05Fixed nxt_conn_accept_alloc() behavior in low memory conditions.Valentin Bartenev1-5/+5
Earlier, if nxt_mp_create() failed to allocate memory while accepting a new connection, the resulting NULL was subsequently passed to nxt_mp_destroy(), crashing the process. More, if nxt_mp_create() was successful but nxt_sockaddr_cache_alloc() failed, the connection object wasn't destroyed properly, leaving the connection counter in an inconsistent state. Repeated, this condition lowered the connection capacity of the process and could eventually prevent it from accepting connections altogether.
2020-07-31Isolation: fixed the generation of mounts table.Tiago Natel de Moura3-10/+8
Since the introduction of rootfs feature, some language modules can't be configured multiple times. Now the configure generates a separate nxt_<module>_mounts.h for each module compiled.
2020-07-28Configuration: fixed buffer over-read in pattern validation.Axel Duch1-2/+3
There was an undefined behavior in the validation function, caused by testing one character after the string if a wildcard was at the end.
2020-07-25Using plain shared memory for configuration pass.Max Romanov4-83/+152
There is no restrictions on configration size and using segmented shared memory only doubles memory usage because to parse configration on router side, it needs to be 'plain' e. g. located in single continous memory buffer.
2020-07-24Configuration: added checking for presence of mandatory fields.Valentin Bartenev3-13/+131
2020-07-24Added missing ending indicator in object members validation lists.Valentin Bartenev1-1/+5
This fixes undefined behaviour due to array over-read if an unknown parameter is specified in an uidmap, a gidmap, or a php target object.
2020-07-24Configuration: removing redundant check.Axel Duch1-3/+3
Thanks to 洪志道 (Hong Zhi Dao).
2020-07-24Minor changes and renaming an NJS artifact to NXT.Axel Duch1-3/+3
This is partially related to #434 issue on Github. Thanks to 洪志道 (Hong Zhi Dao).
2020-07-23Fixing request_app_link reference counting.Max Romanov1-4/+2
Racing conditions reproduced periodically on test_python_process_switch.
2020-07-23Fixing various router crashes on exit caused by runtime pool free.Max Romanov1-7/+18
Currently, the router exits without waiting for the worker threads to stop. There is a short gap between the runtime memory pool's free and the exit, during which a worker thread may try to access a runtime structure. In turn, this may cause a crash. For now, it is better to keep this memory allocated.
2020-07-23PHP: using nxt_unit_default_init() for module structure init.Max Romanov1-32/+4
Using this function in all language modules helps to avoid code duplication and reduce the size of future patches.
2020-07-23Fixing main and application port structs file descriptor init.Max Romanov1-0/+2
Correct value for non-initialized file descriptor is -1, because most of the checks in libunit compares file descriptor with -1 before performing an action. Using 0 as default value, may cause to close file descriptor #0, this may affect application logic. It is not required to list this patch in changelog because impact is not seen by end users.
2020-07-23PHP: removing assertion to fix build on macOS.Max Romanov1-1/+5
The nxt_assert macro uses nxt_thread_context, which caused the following linker error when using it in the library: ld: illegal thread local variable reference to regular symbol _nxt_thread_context for architecture x86_64
2020-07-22Fixing buffer overflow check in discovery.Max Romanov1-1/+1
Incorrect check prevents Unit to start without modules. This issue was introduced in 4a3ec07f4b19.
2020-07-21PHP: logging in request context when possible.Valentin Bartenev1-2/+12
2020-07-21PHP: fixed incorrect time in interpreter error log messages.Valentin Bartenev1-5/+6
Previously, the log message callback used a generic log function, that relied on the process time cache. Since there were no time update calls in the application processes, all log lines were printed with the same time, usually correlated with the process start. Now, a non-cached logging function from libunit is used.
2020-07-21Fixed non-debug log time format in libunit.Valentin Bartenev1-0/+7
This makes log format used in libunit consistent with the daemon, where milliseconds are printed only in the debug log level. Currently a compile time switch is used, since there's no support for runtime changing of a log level for now. But in the future this should be a runtime condition, similar to nxt_log_time_handler().
2020-07-10Router: route patterns multi wildcards fix.Axel Duch1-3/+6
Matching 'start' and 'end' position now adjusted to avoid false matching. This is related to #434 issue on Github. Thanks to 洪志道 (Hong Zhi Dao).
2020-07-06Destroying temporary router configuration.Igor Sysoev2-34/+40
The lifespan of a listening socket is longer than both router configuration's and temporary router configuration's lifespan, so the sockets should be stored in persistent queues. Safety is ensured by the fact that the router processes only one new configuration at any time.
2020-07-04Router: route patterns multi wildcards support.Axel Duch2-152/+210
2020-06-23Upstream chunked transfer encoding support.Igor Sysoev6-97/+178
2020-06-23Decreased level of some socket close() errors.Igor Sysoev2-13/+36
2020-06-23Isolation: fixed build when features aren't detected.Tiago Natel de Moura4-111/+114
2020-05-28Added "rootfs" feature.Tiago Natel de Moura22-71/+1285
2020-03-09Refactor of process management.Tiago Natel de Moura26-1330/+1541
The process abstraction has changed to: setup(task, process) start(task, process_data) prefork(task, process, mp) The prefork() occurs in the main process right before fork. The file src/nxt_main_process.c is completely free of process specific logic. The creation of a process now supports a PROCESS_CREATED state. The The setup() function of each process can set its state to either created or ready. If created, a MSG_PROCESS_CREATED is sent to main process, where external setup can be done (required for rootfs under container). The core processes (discovery, controller and router) doesn't need external setup, then they all proceeds to their start() function straight away. In the case of applications, the load of the module happens at the process setup() time and The module's init() function has changed to be the start() of the process. The module API has changed to: setup(task, process, conf) start(task, data) As a direct benefit of the PROCESS_CREATED message, the clone(2) of processes using pid namespaces now doesn't need to create a pipe to make the child block until parent setup uid/gid mappings nor it needs to receive the child pid.
2020-05-28Moving nxt_stream_ident to shared memory.Max Romanov3-3/+31
This aims to avoid stream id clashes after router restart.
2020-05-28Added NULL check for engine->port.Max Romanov1-2/+4
This is required to handle REMOVE_PID messages if router engine initialization is incomplete.
2020-05-28Closing unsent file descriptors from port queue.Max Romanov1-0/+6
After a process exits, all ports linked to it from other processes should be closed. All unsent file descriptors in port queue, marked as "close after send", should be closed to avoid resource leakage.
2020-05-20Static: fixed potential undefined behavior in memcpy().Valentin Bartenev1-1/+1
According to the C standard, pointer arguments passed to memcpy() calls shall still have valid values. NULL is considered as invalid. Found with GCC Static Analyzer.
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