877d24ac8a
If you have a binary on a filesystem which is also mounted over by nullfs, you could execute the binary from the lower filesystem, or from the nullfs mount. When executed from lower filesystem, the lower vnode gets VV_TEXT flag set, and the file cannot be modified while the binary is active. But, if executed as the nullfs alias, only the nullfs vnode gets VV_TEXT set, and you still can open the lower vnode for write. Add a set of VOPs for the VV_TEXT query, set and clear operations, which are correctly bypassed to lower vnode. Tested by: pho (previous version) MFC after: 2 weeks |
||
|---|---|---|
| .. | ||
| freebsd32 | ||
| ia32 | ||
| linprocfs | ||
| linsysfs | ||
| linux | ||
| ndis | ||
| netbsd | ||
| svr4 | ||
| x86bios | ||