[please consider pruning the CC list if discussing some aspect, which doesn't concern all] I've done an audit of all filesystems with regards to showing mount options in /proc/<pid>/mounts. Unfortunately most of them show none or only a part of all accepted options (for details see list of filesystems at the end of the mail). This is currently not a big problem, because mount(8) stores the given options in /etc/mtab. However we want to get rid of mtab, and this requires, that the option showing be fixed up. It would be easiest if this was done by the VFS instead of having to deal with it in filesystems. However there are differences in how filesytems handle options during mount and remount, and it would be impossible to take this into account in all cases. If you are CC-ed, and responsible for one of these filesystems, please take a moment to fully implement the ->show_options() method. In most cases it should be an easy task. If for some reason you are unable to do this, please let me know and I'll fix it up. Here are some guidelines for showing options. I'll also add these to Documentation/filesystems/vfs.txt + If a filesystem accepts mount options, it must define show_options() + to show all the currently active options. The rules are: + + - options MUST be shown which are not default or their values differ + from the default + + - options MAY be shown which are enabled by default or have their + default value + + Options used only internally between a mount helper and the kernel + (such as file descriptors), or which only have an effect during the + mounting (such as ones controlling the creation of a journal) are exempt + from the above rules. Thanks, Miklos ------- legend: all - fs has options, but doesn't define ->show_options() some - fs defines ->show_options(), but some options are not shown noopt - fs does not have options good - fs shows all options patch - I have a patch 9p some adfs all (maintainer?) affs all afs all autofs all autofs4 some befs all bfs noopt cifs some (odd parser) coda noopt configfs noopt cramfs noopt debugfs noopt devpts patch ecryptfs some efs noopt ext2 patch ext3 patch ext4 patch fat some freevxfs noopt fuse patch gfs2 good hfs good hfsplus good hostfs patch hpfs all hppfs noopt hugetlbfs all isofs all (maintainer?) jffs2 noopt jfs some minix noopt msdos ->fat ncpfs all (FS_BINARY_MOUNTDATA?) nfs some nfsd noopt ntfs good (odd parser) ocfs2 all openpromfs noopt proc noopt qnx4 noopt ramfs noopt reiserfs all romfs noopt smbfs good (odd parser) (maintainer?) sysfs noopt sysv noopt udf all ufs all vfat ->fat xfs some (odd parser) mm/shmem.c patch drivers/oprofile/oprofilefs.c noopt drivers/infiniband/hw/ipath/ipath_fs.c noopt drivers/misc/ibmasm/ibmasmfs.c noopt drivers/usb/core (usbfs) noopt drivers/usb/gadget (gadgetfs) noopt drivers/isdn/capi/capifs.c noopt kernel/cpuset.c noopt fs/binfmt_misc.c noopt net/sunrpc/rpc_pipe.c noopt arch/powerpc/platforms/cell/spufs all arch/s390/hypfs all ipc/mqueue.c noopt security (securityfs) noopt security/selinux/selinuxfs.c noopt in -mm: reiser4 some (odd parser) kernel/container.c good (odd parser) - To unsubscribe from this list: send the line "unsubscribe reiserfs-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
