ead50c94cb
Without this patch, the KASSERT(must_commit == 0,..) can be triggered by the writeverf in the Direct I/O write reply changing. This is not a situation that should cause a panic(). Correct handling is to ignore the change in "writeverf" for Direct I/O, since it is done with NFSWRITE_FILESYNC. This patch modifies the semantics of the "must_commit" argument slightly, allowing an initial value of 2 to indicate that a change in "writeverf" should be ignored. It also fixes the KASSERT()s. This bug would affect few, since Direct I/O is not enabled by default and "writeverf" rarely changes. Normally "writeverf" only changes when a NFS server reboots, however I found the bug when testing against a Linux 5.15.1 kernel nfsd, which replied to a NFSWRITE_FILESYNC write with a "writeverf" of all 0x0 bytes. MFC after: 2 weeks
FreeBSD Source:
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| Directory | Description |
|---|---|
| bin | System/user commands. |
| cddl | Various commands and libraries under the Common Development and Distribution License. |
| contrib | Packages contributed by 3rd parties. |
| crypto | Cryptography stuff (see crypto/README). |
| etc | Template files for /etc. |
| gnu | Various commands and libraries under the GNU Public License. Please see gnu/COPYING and gnu/COPYING.LIB for more information. |
| include | System include files. |
| kerberos5 | Kerberos5 (Heimdal) package. |
| lib | System libraries. |
| libexec | System daemons. |
| release | Release building Makefile & associated tools. |
| rescue | Build system for statically linked /rescue utilities. |
| sbin | System commands. |
| secure | Cryptographic libraries and commands. |
| share | Shared resources. |
| stand | Boot loader sources. |
| sys | Kernel sources. |
sys/arch/conf |
Kernel configuration files. GENERIC is the configuration used in release builds. NOTES contains documentation of all possible entries. |
| tests | Regression tests which can be run by Kyua. See tests/README for additional information. |
| tools | Utilities for regression testing and miscellaneous tasks. |
| usr.bin | User commands. |
| usr.sbin | System administration commands. |
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