66191a76ac
Add an assertion to unionfs_node_update() that the upper vnode is exclusively locked; we already make the same assertion for the lower vnode. Also, assert in unionfs_noderem() that the vnode lock is not recursed and acquire v_lock with LK_NOWAIT. Since v_lock is not the active lock for the vnode at this point, it should not be contended. Finally, remove VDIR assertions from unionfs_get_cached_vnode(). lvp/uvp will be referenced but not locked at this point, so v_type may concurrently change due to vgonel(). The cached unionfs node, if one exists, would only have made it into the cache if lvp/uvp were of type VDIR at the time of insertion; the corresponding VDIR assert in unionfs_ins_cached_vnode() should be safe because lvp/uvp will be locked by that time and will not be used if either is doomed. Noted by: kib Reviewed by: kib Differential Revision: https://reviews.freebsd.org/D32629
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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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