Chris Novakovic c04d2cb200 ipconfig: Write NTP server IPs to /proc/net/ipconfig/ntp_servers ... Distributed filesystems are most effective when the server and client clocks are synchronised. Embedded devices often use NFS for their root filesystem but typically do not contain an RTC, so the clocks of the NFS server and the embedded device will be out-of-sync when the root filesystem is mounted (and may not be synchronised until late in the boot process). Extend ipconfig with the ability to export IP addresses of NTP servers it discovers to /proc/net/ipconfig/ntp_servers. They can be supplied as follows: - If ipconfig is configured manually via the "ip=" or "nfsaddrs=" kernel command line parameters, one NTP server can be specified in the new "<ntp0-ip>" parameter. - If ipconfig is autoconfigured via DHCP, request DHCP option 42 in the DHCPDISCOVER message, and record the IP addresses of up to three NTP servers sent by the responding DHCP server in the subsequent DHCPOFFER message. ipconfig will only write the NTP server IP addresses it discovers to /proc/net/ipconfig/ntp_servers, one per line (in the order received from the DHCP server, if DHCP autoconfiguration is used); making use of these NTP servers is the responsibility of a user space process (e.g. an initrd/initram script that invokes an NTP client before mounting an NFS root filesystem). Signed-off-by: Chris Novakovic <chris@chrisn.me.uk> Signed-off-by: David S. Miller <davem@davemloft.net>		2018-04-24 13:40:42 -04:00
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caching	fscache: Pass object size in rather than calling back for it	2018-04-06 14:05:14 +01:00
cifs	Update README file for cifs.ko	2018-04-01 20:24:39 -05:00
configfs	fs: configfs: don't return anything from drop_link	2016-12-01 10:50:49 +01:00
nfs	ipconfig: Write NTP server IPs to /proc/net/ipconfig/ntp_servers	2018-04-24 13:40:42 -04:00
pohmelfs	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
00-INDEX	logfs: remove from tree	2016-12-14 23:48:11 -05:00
9p.txt	9p: update documentation	2014-01-24 10:55:21 -06:00
Locking	vfs: add flags to d_real()	2017-09-04 21:42:22 +02:00
adfs.txt	…
affs.txt	affs: add mount option to avoid filename truncates	2014-04-07 16:36:08 -07:00
afs.txt	afs: Implement @sys substitution handling	2018-04-09 21:12:31 +01:00
autofs4-mount-control.txt	autofs: update ioctl documentation regarding struct autofs_dev_ioctl	2017-02-27 18:43:45 -08:00
autofs4.txt	Fix up over-eager 'wait_queue_t' renaming	2017-07-10 11:40:19 -07:00
automount-support.txt	Documentation: remove outdated information from automount-support.txt	2015-05-15 01:10:38 -04:00
befs.txt	…
bfs.txt	Tigran has moved	2017-05-12 15:57:15 -07:00
btrfs.txt	Documentation: btrfs: remove usage specific information	2016-03-11 17:02:09 +01:00
ceph.txt	ceph: quota: report root dir quota usage in statfs	2018-04-02 11:17:53 +02:00
coda.txt	…
conf.py	docs-rst: convert filesystems book to ReST	2017-05-16 08:44:08 -03:00
cramfs.txt	cramfs: rehabilitate it	2017-10-15 00:47:23 -04:00
dax.txt	powerpc/cell: Remove axonram driver	2018-01-28 17:00:36 +11:00
debugfs.txt	debugfs: Pass bool pointer to debugfs_create_bool()	2015-10-04 11:36:07 +01:00
devpts.txt	devpts: Make each mount of devpts an independent filesystem.	2016-06-05 10:36:01 -07:00
directory-locking	vfs: remove unused i_op->rename	2016-09-27 11:03:58 +02:00
dlmfs.txt	ocfs2: update web page + git tree in documentation	2015-02-28 09:57:50 -08:00
dnotify.txt	Documentation: fix selftests related file refs	2017-10-19 12:58:21 -06:00
ecryptfs.txt	…
efivarfs.txt	efi: Make efivarfs entries immutable by default	2016-02-10 16:25:52 +00:00
exofs.txt	…
ext2.txt	fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at	2018-01-01 12:45:37 -07:00
ext3.txt	fs: Remove ext3 filesystem driver	2015-07-23 20:59:40 +02:00
ext4.txt	Only miscellaneous cleanups and bug fixes for ext4 this cycle.	2018-02-03 13:49:22 -08:00
f2fs.txt	f2fs: introduce a new mount option test_dummy_encryption	2018-03-17 14:02:57 +09:00
fiemap.txt	fsioctl.c: make generic_block_fiemap() signal-tolerant	2015-02-10 14:30:30 -08:00
files.txt	…
fscrypt.rst	fscrypt: document symlink length restriction	2018-01-11 23:30:09 -05:00
fuse.txt	…
gfs2-glocks.txt	GFS2: Minor improvements to comments and documentation	2018-04-12 10:07:51 -07:00
gfs2-uevents.txt	…
gfs2.txt	…
hfs.txt	…
hfsplus.txt	Documentation: update URL to hfsplus Technote 1150	2014-02-20 14:48:51 +01:00
hpfs.txt	…
index.rst	fscrypt: add a documentation file for filesystem-level encryption	2017-10-31 13:49:24 -04:00
inotify.txt	inotify: update documentation to reflect code changes	2015-02-10 14:30:28 -08:00
isofs.txt	…
jfs.txt	doc: fix misspellings with 'codespell' tool	2013-05-28 12:02:12 +02:00
locks.txt	docs: fix locations of several documents that got moved	2016-10-24 08:12:35 -02:00
mandatory-locking.txt	…
ncpfs.txt	…
nilfs2.txt	MAINTAINERS, nilfs2: change project home URLs	2018-01-13 10:42:48 -08:00
ntfs.txt	NTFS: Remove changelog from Documentation/filesystems/ntfs.txt.	2014-10-16 12:43:57 +01:00
ocfs2-online-filecheck.txt	Doc: ocfs: Fix typo in filesystems/ocfs2-online-filecheck.txt	2016-07-01 16:17:15 -06:00
ocfs2.txt	ocfs2: update web page + git tree in documentation	2015-02-28 09:57:50 -08:00
omfs.txt	…
orangefs.txt	Orangefs: documentation updates	2018-04-04 14:05:48 -04:00
overlayfs.txt	ovl: update documentation w.r.t "xino" feature	2018-04-12 12:04:51 +02:00
path-lookup.md	locking/atomics, doc/filesystems: Convert ACCESS_ONCE() references	2017-10-25 11:01:05 +02:00
path-lookup.txt	Documentation: add new description of path-name lookup.	2015-11-02 18:18:25 -07:00
porting	vfs: grab the lock instead of blocking in __fd_install during resizing	2017-11-05 18:58:07 -05:00
proc.txt	proc, coredump: add CoreDumping flag to /proc/pid/status	2017-11-17 16:10:00 -08:00
qnx6.txt	Documentation: fix common spelling mistakes	2016-04-28 07:51:59 -06:00
quota.txt	scripts/spelling.txt: add "an user" pattern and fix typo instances	2017-02-27 18:43:46 -08:00
ramfs-rootfs-initramfs.txt	initmpfs: use initramfs if rootfstype= or root= specified	2013-09-11 15:59:38 -07:00
relay.txt	doc: Fix typo in doucmentations	2013-07-25 12:34:15 +02:00
romfs.txt	…
seq_file.txt	Documentation: update seq_file	2014-12-29 15:40:18 -07:00
sharedsubtree.txt	doc: fix grammar	2016-03-09 15:33:06 -07:00
spufs.txt	…
squashfs.txt	Squashfs: Add LZ4 compression configuration option	2014-11-27 18:48:44 +00:00
sysfs-pci.txt	PCI: Add pci_mmap_resource_range() and use it for ARM64	2017-04-20 08:47:47 -05:00
sysfs-tagging.txt	sysfs-tagging.txt: fix pre-kernfs references	2015-09-13 14:38:51 -06:00
sysfs.txt	kallsyms: remove print_symbol() function	2018-01-16 16:59:55 +01:00
sysv-fs.txt	…
tmpfs.txt	Documenation: update cgroup's document path	2016-08-03 15:43:58 -06:00
ubifs.txt	…
udf.txt	udf: Remove never implemented mount options	2018-02-27 10:25:33 +01:00
ufs.txt	…
vfat.txt	Documentation/filesystems/vfat.txt: fix a remark that implies UCS2	2017-12-21 13:39:28 -07:00
vfs.txt	Merge branch 'overlayfs-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/vfs	2017-09-13 09:11:44 -07:00
xfs-delayed-logging-design.txt	…
xfs-self-describing-metadata.txt	xfs: add metadata CRC documentation	2013-04-27 13:27:43 -05:00
xfs.txt	xfs: Change URL for the project in xfs.txt	2018-03-21 09:33:04 -06:00