tags 838958 fixed-upstream thanks On 09/27/2016 11:27 AM, Debian Bug Tracking System wrote: > Processing control commands: > >> reassign -1 manpages-dev > Bug #838958 [src:linux] linux: mount(2) _silently_ ignores other mountflags > when MS_BIND is set > Bug reassigned from package 'src:linux' to 'manpages-dev'. > Ignoring request to alter found versions of bug #838958 to the same values > previously set > Ignoring request to alter fixed versions of bug #838958 to the same values > previously set
By chance, in the most recent upstream release (4.07) I made substantial changes to the mount(2) page: http://man7.org/linux/man-pages/man2/mount.2.html In particular, I think the following new text addresses the doc problem relevant to this bug: Creating a bind mount If mountflags includes MS_BIND (available since Linux 2.4), then perform a bind mount. A bind mount makes a file or a directory subtree visible at another point within the single directory hierarchy. Bind mounts may cross filesystem boundaries and span chroot(2) jails. The filesystemtype and data arguments are ignored. The remaining bits in the mountflags argument are also ignored, with the exception of MS_REC. (The bind mount has the same mount options as the underlying mount point.) However, see the discussion of remounting above, for a method of making an existing bind mount read- only. And the referred-to text describing MS_REMOUNT nowadays says: Since Linux 2.6.26, this flag can also be used to make an existing bind mount read-only by specifying mountflags as: MS_REMOUNT | MS_BIND | MS_RDONLY Note that only the MS_RDONLY setting of the bind mount can be changed in this manner. Cheers, Michael -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/ -- Michael Kerrisk Linux man-pages maintainer; http://www.kernel.org/doc/man-pages/ Linux/UNIX System Programming Training: http://man7.org/training/
