Kevin Bowling
4b5e09be14
Publish an atomic software run state snapshot through iflib_is_running(). Use it for iflib traffic admission, queue tasks, timers, debugnet and live-configuration checks instead of reading the unsynchronized ifnet driver flags. Keep admission closed after failed initialization and close it when a watchdog requests deferred recovery. Retain the context-locked datapath state for DMA ownership: a closed admission gate does not establish that the hardware is stopped. Open the gate after receive buffer setup and before interrupt enable, at the existing RUNNING publication point. Serialize the writers with the state mutex and continue publishing RUNNING/OACTIVE for network stack consumers. The accessor takes no lock and is usable from filters, but is only a snapshot, not a context reference or a queue-user drain. Recheck multicast and VFLR admission under the context lock. Replace the OACTIVE drain check with the same private admission gate, retaining the separate per-queue descriptor backpressure policy. Rename its debug counter to txq_drain_stopped. Document the accessor and its synchronization limits. This does not remove legacy flag reads elsewhere in the network stack or change the existing queue-drain and device-stop contracts. External drivers will still see the IFF_DRV_ publications but should migrate to this API. Reviewed by: iflib (gallatin) MFC after: 2 weeks Sponsored by: BBOX.io Differential Revision: https://reviews.freebsd.org/D59598
FreeBSD Source:
This is the top level of the FreeBSD source directory.
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.
For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.
For official FreeBSD bootable images, see the release page.
Source Roadmap:
| Directory | Description |
|---|---|
| bin | System/user commands. |
| cddl | Source code for third-party software under the Common Development and Distribution License. |
| contrib | Source code for third-party software. |
| crypto | Source code for cryptographic libraries and commands (see crypto/README). |
| etc | Template files for /etc. |
| include | System include files. |
| kerberos5 | Build system for Kerberos 5 (Heimdal). |
| krb5 | Build system for Kerberos 5 (MIT). |
| lib | System libraries. |
| libexec | System commands intended to be executed by other commands or daemons. |
| packages | Base system packages. |
| release | Makefiles and scripts used for building releases and VM images. |
| rescue | Build system for statically linked /rescue commands. |
| sbin | System commands. |
| secure | Build system for cryptographic libraries and commands (excluding Kerberos). |
| share | Shared resources. |
| stand | Boot loader sources. |
| sys | Kernel sources (see sys/README.md). |
| targets | Support for experimental DIRDEPS_BUILD |
| tests | Tests which can be run by Kyua. See tests/README for additional information. |
| tools | Ancillary utilities and tests (not included in the build). |
| usr.bin | User commands. |
| usr.sbin | System administration commands. |
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.