linux/fs/proc/root.c, branch v5.5

new helper: get_tree_keyed()

2019-09-05T18:34:22Z

For vfs_get_keyed_super users. Signed-off-by: Al Viro

Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2019-07-19T17:42:02Z

Pull vfs mount updates from Al Viro: "The first part of mount updates. Convert filesystems to use the new mount API" * 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits) mnt_init(): call shmem_init() unconditionally constify ksys_mount() string arguments don't bother with registering rootfs init_rootfs(): don't bother with init_ramfs_fs() vfs: Convert smackfs to use the new mount API vfs: Convert selinuxfs to use the new mount API vfs: Convert securityfs to use the new mount API vfs: Convert apparmorfs to use the new mount API vfs: Convert openpromfs to use the new mount API vfs: Convert xenfs to use the new mount API vfs: Convert gadgetfs to use the new mount API vfs: Convert oprofilefs to use the new mount API vfs: Convert ibmasmfs to use the new mount API vfs: Convert qib_fs/ipathfs to use the new mount API vfs: Convert efivarfs to use the new mount API vfs: Convert configfs to use the new mount API vfs: Convert binfmt_misc to use the new mount API convenience helper: get_tree_single() convenience helper get_tree_nodev() vfs: Kill sget_userns() ...

fanotify: Disallow permission events for proc filesystem

2019-05-28T16:10:07Z

Proc filesystem has special locking rules for various files. Thus fanotify which opens files on event delivery can easily deadlock against another process that waits for fanotify permission event to be handled. Since permission events on /proc have doubtful value anyway, just disallow them. Link: https://lore.kernel.org/linux-fsdevel/20190320131642.GE9485@quack2.suse.cz/ Reviewed-by: Amir Goldstein Signed-off-by: Jan Kara

procfs: set ->user_ns before calling ->get_tree()

2019-05-25T22:00:00Z

here it's even simpler than in mqueue - pid_ns_prepare_proc() does everything needed anyway. Signed-off-by: Al Viro

Merge branch 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2019-03-12T21:08:19Z

Pull vfs mount infrastructure updates from Al Viro: "The rest of core infrastructure; no new syscalls in that pile, but the old parts are switched to new infrastructure. At that point conversions of individual filesystems can happen independently; some are done here (afs, cgroup, procfs, etc.), there's also a large series outside of that pile dealing with NFS (quite a bit of option-parsing stuff is getting used there - it's one of the most convoluted filesystems in terms of mount-related logics), but NFS bits are the next cycle fodder. It got seriously simplified since the last cycle; documentation is probably the weakest bit at the moment - I considered dropping the commit introducing Documentation/filesystems/mount_api.txt (cutting the size increase by quarter ;-), but decided that it would be better to fix it up after -rc1 instead. That pile allows to do followup work in independent branches, which should make life much easier for the next cycle. fs/super.c size increase is unpleasant; there's a followup series that allows to shrink it considerably, but I decided to leave that until the next cycle" * 'work.mount' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (41 commits) afs: Use fs_context to pass parameters over automount afs: Add fs_context support vfs: Add some logging to the core users of the fs_context log vfs: Implement logging through fs_context vfs: Provide documentation for new mount API vfs: Remove kern_mount_data() hugetlbfs: Convert to fs_context cpuset: Use fs_context kernfs, sysfs, cgroup, intel_rdt: Support fs_context cgroup: store a reference to cgroup_ns into cgroup_fs_context cgroup1_get_tree(): separate "get cgroup_root to use" into a separate helper cgroup_do_mount(): massage calling conventions cgroup: stash cgroup_root reference into cgroup_fs_context cgroup2: switch to option-by-option parsing cgroup1: switch to option-by-option parsing cgroup: take options parsing into ->parse_monolithic() cgroup: fold cgroup1_mount() into cgroup1_get_tree() cgroup: start switching to fs_context ipc: Convert mqueue fs to fs_context proc: Add fs_context support to procfs ...

proc: remove unused argument in proc_pid_lookup()

2019-03-06T05:07:21Z

[adobriyan@gmail.com: delete "extern" from prototype] Link: http://lkml.kernel.org/r/20190114195635.GA9372@avx2 Signed-off-by: Zhikang Zhang Signed-off-by: Alexey Dobriyan Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

proc: Add fs_context support to procfs

2019-02-28T08:29:28Z

Add fs_context support to procfs. Signed-off-by: David Howells cc: Alexey Dobriyan Signed-off-by: Al Viro

procfs: Move proc_fill_super() to fs/proc/root.c

2019-02-28T08:29:27Z

Move proc_fill_super() to fs/proc/root.c as that's where the other superblock stuff is. Signed-off-by: David Howells Reviewed-by: Alexey Dobriyan cc: Alexey Dobriyan Signed-off-by: Al Viro

proc: Make inline name size calculation automatic

2018-06-15T04:48:57Z

Make calculation of the size of the inline name in struct proc_dir_entry automatic, rather than having to manually encode the numbers and failing to allow for lockdep. Require a minimum inline name size of 33+1 to allow for names that look like two hex numbers with a dash between. Reported-by: Al Viro Signed-off-by: David Howells Signed-off-by: Al Viro

proc: use slower rb_first()

2018-04-11T17:28:34Z

In a typical for /proc "open+read+close" usecase, dentry is looked up successfully on open only to be killed in dput() on close. In fact dentries which aren't /proc/*/... and /proc/sys/* were almost NEVER CACHED. Simple printk in proc_lookup_de() shows that. Now that ->delete hook intelligently picks which dentries should live in dcache and which should not, rbtree caching is not necessary as dcache does it job, at last! As a side effect, struct proc_dir_entry shrinks by one pointer which can go into inline name. Link: http://lkml.kernel.org/r/20180314231032.GA15854@avx2 Signed-off-by: Alexey Dobriyan Acked-by: Davidlohr Bueso Cc: Peter Zijlstra Cc: Al Viro Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds