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Mark Bellon 8fc2751beb [PATCH] disk quotas fail when /etc/mtab is symlinked to /proc/mounts 
If /etc/mtab is a regular file all of the mount options (of a file system)
are written to /etc/mtab by the mount command.  The quota tools look there
for the quota strings for their operation.  If, however, /etc/mtab is a
symlink to /proc/mounts (a "good thing" in some environments) the tools
don't write anything - they assume the kernel will take care of things.

While the quota options are sent down to the kernel via the mount system
call and the file system codes handle them properly unfortunately there is
no code to echo the quota strings into /proc/mounts and the quota tools
fail in the symlink case.

The attached patchs modify the EXT[2|3] and JFS codes to add the necessary
hooks.  The show_options function of each file system in these patches
currently deal with only those things that seemed related to quotas;
especially in the EXT3 case more can be done (later?).

Jan Kara also noted the difficulty in moving these changes above the FS
codes responding similarly to myself to Andrew's comment about possible
VFS migration. Issue summary:

 - FS codes have to process the entire string of options anyway.

 - Only FS codes that use quotas must have a show_options function (for
   quotas to work properly) however quotas are only used in a small number
   of FS.

 - Since most of the quota using FS support other options these FS codes
   should have the a show_options function to show those options - and the
   quota echoing becomes virtually negligible.

Based on feedback I have modified my patches from the original:

   JFS a missing patch has been restored to the posting
   EXT[2|3] and JFS always use the show_options function
       - Each FS has at least one FS specific option displayed
       - QUOTA output is under a CONFIG_QUOTA ifdef
       - a follow-on patch will add a multitude of options for each FS
   EXT[2|3] and JFS "quota" is treated as "usrquota"
   EXT3 journalled data check for journalled quota removed
   EXT[2|3] mount when quota specified but not compiled in

 - no changes from my original patch.  I tested the patch and the codes
   warn but

 - still mount.  With all due respection I believe the comments
   otherwise were a

 - misread of the patch.  Please reread/test and comment.  XFS patch
   removed - the XFS team already made the necessary changes EXT3 mixing
   old and new quotas are handled differently (not purely exclusive)

 - if old and new quotas for the same type are used together the old
   type is silently depricated for compatability (e.g.  usrquota and
   usrjquota)

 - mixing of old and new quotas is an error (e.g.  usrjquota and
   grpquota)

Signed-off-by: Mark Bellon <mbellon@mvista.com>
Acked-by: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Jan Kara <jack@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-09-07 16:57:23 -07:00
..
byteorder
dvb
hdlc
isdn
lockd
mmc [MMC] ios for mmc chip select 2005-09-03 16:45:02 +01:00
mtd
netfilter [NETLINK]: Convert netlink users to use group numbers instead of bitmasks 2005-08-29 16:00:54 -07:00
netfilter_arp
netfilter_bridge
netfilter_ipv4 [NETFILTER]: Add new iptables TTL target 2005-08-29 16:13:22 -07:00
netfilter_ipv6 [NETFILTER6]: Add new ip6tables HOPLIMIT target 2005-08-29 16:13:29 -07:00
nfsd
raid
sunrpc
tc_act
tc_ematch
8250_pci.h
a.out.h
ac97_codec.h
acct.h
acpi.h
adb.h
adfs_fs_i.h
adfs_fs_sb.h
adfs_fs.h
affs_fs.h
affs_hardblocks.h
agp_backend.h
agpgart.h
aio_abi.h
aio.h
amifd.h
amifdreg.h
amigaffs.h
apm_bios.h
arcdevice.h
arcfb.h
ata.h Merge /spare/repo/linux-2.6/ 2005-08-29 15:59:42 -04:00
atalk.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_suni.h
atm_tcp.h
atm_zatm.h
atm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
attribute_container.h
audit.h
auto_fs4.h
auto_fs.h
auxvec.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
awe_voice.h
ax25.h
b1lli.h
b1pcmcia.h
backing-dev.h
backlight.h
baycom.h
bcd.h
bfs_fs.h
binfmts.h
bio.h [PATCH] kill bio->bi_set 2005-09-07 16:57:20 -07:00
bitmap.h
bitops.h
blkdev.h
blkpg.h
blockgroup_lock.h
bootmem.h
bpqether.h
buffer_head.h
cache.h
capability.h [PATCH] VM: add capabilites check to set_zone_reclaim 2005-09-05 00:05:44 -07:00
capi.h
cciss_ioctl.h
cd1400.h
cdev.h
cdk.h
cdrom.h
chio.h
circ_buf.h
cobalt-nvram.h
coda_cache.h
coda_fs_i.h
coda_linux.h
coda_proc.h
coda_psdev.h
coda.h
coff.h
com20020.h
compat_ioctl.h
compat.h [PATCH] compat: be more consistent about [ug]id_t 2005-09-07 16:57:19 -07:00
compiler-gcc2.h
compiler-gcc3.h
compiler-gcc4.h
compiler-gcc.h
compiler-intel.h
compiler.h
completion.h
comstats.h
concap.h
config.h
console_struct.h
console.h
consolemap.h
cpu.h [PATCH] remove driverfs references from include/linux/cpu.h and net/sunrpc/rpc_pipe.c 2005-09-02 00:57:31 -07:00
cpufreq.h
cpumask.h
cpuset.h
cramfs_fs_sb.h
cramfs_fs.h
crash_dump.h
crc32.h
crc32c.h
crc-ccitt.h
crypto.h [CRYPTO]: Added CRYPTO_TFM_REQ_MAY_SLEEP flag 2005-09-01 17:43:05 -07:00
cryptohash.h
ctype.h
cuda.h
cyclades.h
cyclomx.h
cycx_cfm.h
cycx_drv.h
cycx_x25.h
dcache.h
dccp.h [DCCP]: Introduce DCCP_SOCKOPT_PACKET_SIZE 2005-08-29 16:13:37 -07:00
dcookies.h
debugfs.h
delay.h
devfs_fs_kernel.h
devfs_fs.h
device-mapper.h
device.h
devpts_fs.h
dio.h
dirent.h
divert.h
dm9000.h
dm-ioctl.h
dma-mapping.h
dmapool.h
dmi.h
dn.h
dnotify.h
dqblk_v1.h
dqblk_v2.h
dqblk_xfs.h
ds1286.h
dtlk.h
edd.h
eeprom.h
efi.h [PATCH] x86: fix EFI memory map parsing 2005-09-05 00:06:09 -07:00
efs_dir.h
efs_fs_i.h
efs_fs_sb.h
efs_fs.h
efs_vh.h
eisa.h
elevator.h
elf-fdpic.h
elf.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
elfcore.h
err.h
errno.h
errqueue.h
etherdevice.h
ethtool.h [NET]: Add support for getting the permanent hardware address. 2005-08-29 16:02:44 -07:00
eventpoll.h
ext2_fs_sb.h
ext2_fs.h [PATCH] disk quotas fail when /etc/mtab is symlinked to /proc/mounts 2005-09-07 16:57:23 -07:00
ext3_fs_i.h
ext3_fs_sb.h
ext3_fs.h [PATCH] disk quotas fail when /etc/mtab is symlinked to /proc/mounts 2005-09-07 16:57:23 -07:00
ext3_jbd.h
fadvise.h
fb.h
fcdevice.h
fcntl.h
fd1772.h
fd.h
fddidevice.h
fdreg.h
file.h
filter.h
firmware.h
flat.h
font.h [PATCH] New framebuffer fonts + updated 12x22 font available 2005-06-21 19:07:41 -07:00
fs_struct.h
fs.h
fsl_devices.h
fsnotify.h
ftape-header-segment.h
ftape-vendors.h
ftape.h
futex.h [PATCH] FUTEX_WAKE_OP: pthread_cond_signal() speedup 2005-09-07 16:57:17 -07:00
gameport.h
gen_stats.h
genalloc.h
generic_serial.h
genhd.h
gfp.h
hardirq.h
harrier_defs.h
hash.h
hayesesp.h
hdlc.h
hdlcdrv.h
hdpu_features.h
hdreg.h
hdsmart.h
hiddev.h
highmem.h
highuid.h
hippidevice.h [NET]: net/802: more endian annotations 2005-08-29 16:10:54 -07:00
hpet.h
hpfs_fs.h
hugetlb.h [PATCH] remove hugetlb_clean_stale_pgtable() and fix huge_pte_alloc() 2005-09-05 00:05:46 -07:00
hwmon-sysfs.h [PATCH] I2C: W83792D driver 1/3 2005-09-05 09:14:13 -07:00
hwmon-vid.h [PATCH] hwmon: hwmon vs i2c, second round (10/11) 2005-09-05 09:14:23 -07:00
hwmon.h [PATCH] hwmon: move SENSORS_LIMIT to hwmon.h 2005-09-05 09:14:17 -07:00
hysdn_if.h
i2c-algo-bit.h
i2c-algo-ite.h
i2c-algo-pca.h
i2c-algo-pcf.h
i2c-algo-sgi.h
i2c-algo-sibyte.h
i2c-dev.h
i2c-id.h [PATCH] I2C: Kill i2c_algorithm.id (7/7) 2005-09-05 09:14:33 -07:00
i2c-isa.h [PATCH] I2C: Kill i2c_algorithm.id (5/7) 2005-09-05 09:14:31 -07:00
i2c.h [PATCH] I2C: Drop the I2C_ACK_TEST ioctl 2005-09-05 09:26:56 -07:00
i2o-dev.h
i2o.h
i8k.h
ibmtr.h
icmp.h
icmpv6.h
ide.h
idr.h
if_arcnet.h
if_arp.h
if_bonding.h
if_bridge.h
if_cablemodem.h
if_ec.h
if_eql.h
if_ether.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
if_fc.h [NET]: net/802: more endian annotations 2005-08-29 16:10:54 -07:00
if_fddi.h [NET]: net/802: more endian annotations 2005-08-29 16:10:54 -07:00
if_frad.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
if_hippi.h [NET]: net/802: more endian annotations 2005-08-29 16:10:54 -07:00
if_infiniband.h
if_ltalk.h [ATALK]: Add alloc_ltalkdev(). 2005-05-05 14:25:59 -07:00
if_packet.h
if_plip.h
if_ppp.h
if_pppox.h
if_shaper.h
if_slip.h
if_strip.h
if_tr.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
if_tun.h [TUNTAP]: Allow setting the linktype of the tap device from userspace 2005-09-01 17:40:05 -07:00
if_tunnel.h
if_vlan.h [NET]: Kill skb->real_dev 2005-08-29 15:32:25 -07:00
if_wanpipe_common.h
if_wanpipe.h
if.h
igmp.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
in6.h
in_route.h
in.h [DCCP]: Initial implementation 2005-08-29 15:49:46 -07:00
inet_diag.h [INET_DIAG]: Rename tcp_diag.[ch] to inet_diag.[ch] 2005-08-29 15:57:48 -07:00
inet.h
inetdevice.h
init_task.h
init.h
initrd.h
inotify.h
input.h
interrupt.h
ioc4.h
ioctl32.h [PATCH] remove register_ioctl32_conversion and unregister_ioctl32_conversion 2005-09-07 16:57:20 -07:00
ioctl.h
ioport.h
ioprio.h
ip6_tunnel.h
ip_mp_alg.h
ip.h [NET]: Introduce inet_connection_sock 2005-08-29 15:43:19 -07:00
ipc.h
ipmi_msgdefs.h
ipmi_smi.h
ipmi.h
ipsec.h
ipv6_route.h
ipv6.h [IPV6]: Generalise the tcp_v6_lookup routines 2005-08-29 15:57:24 -07:00
ipx.h
irda.h
irq_cpustat.h
irq.h [PATCH] x86/x86_64: deferred handling of writes to /proc/irqxx/smp_affinity 2005-09-07 16:57:15 -07:00
isapnp.h
isdn_divertif.h
isdn_ppp.h
isdn.h
isdnif.h
isicom.h
iso_fs.h
istallion.h
ite_gpio.h
ixjuser.h
jbd.h [PATCH] fs/jbd/: cleanups 2005-09-07 16:57:19 -07:00
jffs2_fs_i.h
jffs2_fs_sb.h
jffs2.h
jffs.h
jhash.h
jiffies.h
journal-head.h
joystick.h
kallsyms.h
kbd_diacr.h
kbd_kern.h
kd.h
kdev_t.h
kernel_stat.h
kernel.h
kernelcapi.h
kexec.h
key-ui.h
key.h
keyboard.h
keyctl.h
kfifo.h
klist.h [PATCH] klist: fix klist to have the same klist_add semantics as list_head 2005-09-05 16:03:13 -07:00
kmalloc_sizes.h
kmod.h
kobj_map.h
kobject_uevent.h
kobject.h [PATCH] kset_hotplug_ops->name shoudl return const char * 2005-06-20 15:15:01 -07:00
kprobes.h
kref.h
kthread.h
lapb.h
lcd.h
libata.h /spare/repo/libata-dev branch 'iomap-try3' 2005-09-05 05:20:33 -04:00
libps2.h
limits.h
linkage.h
linux_logo.h
list.h [LIST]: Add docbook header comments for hlist_add_{before,after}_rcu() 2005-08-29 16:11:00 -07:00
llc.h
loop.h
lp.h
major.h
matroxfb.h
mbcache.h
mc6821.h
mc146818rtc.h
mca-legacy.h
mca.h
mempolicy.h [PATCH] /proc/<pid>/numa_maps to show on which nodes pages reside 2005-09-05 00:05:43 -07:00
mempool.h
meye.h
mii.h
minix_fs.h
miscdevice.h
mm_inline.h
mm.h
mman.h
mmtimer.h
mmzone.h [PATCH] sparsemem extreme: hotplug preparation 2005-09-05 00:05:38 -07:00
mod_devicetable.h [PATCH] Make MODULE_DEVICE_TABLE work for vio devices 2005-08-30 13:31:56 +10:00
module.h
moduleloader.h
moduleparam.h
mount.h
mpage.h
mqueue.h
mroute.h
msdos_fs.h
msg.h
mtio.h
mv643xx.h [PATCH] ppc32: mv64x60 updates & enhancements 2005-09-05 00:06:00 -07:00
n_r3964.h
namei.h
namespace.h
nbd.h
ncp_fs_i.h
ncp_fs_sb.h
ncp_fs.h
ncp_mount.h
ncp_no.h
ncp.h
net.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
netdevice.h [NET]: Add support for getting the permanent hardware address. 2005-08-29 16:02:44 -07:00
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h [NETLINK]: Convert netlink users to use group numbers instead of bitmasks 2005-08-29 16:00:54 -07:00
netfilter_ipv4.h [NETFILTER]: Rename skb_ip_make_writable() to skb_make_writable() 2005-08-29 15:34:40 -07:00
netfilter_ipv6.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
netfilter_logging.h
netfilter.h [NETFILTER]: Fix gcc-3.4.x warning about iplicit operator precedence 2005-08-29 15:57:14 -07:00
netlink.h [NETLINK]: Fix sparse warnings 2005-08-29 16:01:35 -07:00
netpoll.h
netrom.h
nfs2.h
nfs3.h
nfs4_acl.h
nfs4_mount.h
nfs4.h
nfs_fs_i.h
nfs_fs_sb.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfs_page.h
nfs_xdr.h
nfs.h
nfsacl.h
nfsd_idmap.h
nls.h
nmi.h
node.h
nodemask.h
notifier.h
nubus.h
numa.h
nvram.h
openprom_fs.h
oprofile.h
page-flags.h [PATCH] VM: add page_state info to per-node meminfo 2005-09-05 00:05:49 -07:00
pagemap.h
pagevec.h
param.h
parport_pc.h
parport.h
parser.h
patchkey.h
pci_ids.h [PATCH] MIPS Technologies PCI ID bits 2005-09-05 00:06:04 -07:00
pci-acpi.h
pci.h
pcieport_if.h
percpu_counter.h
percpu.h
personality.h
pfkeyv2.h
pg.h
phonedev.h
phy.h [PATCH] PHY Layer fixup 2005-08-28 20:28:25 -04:00
pid.h
pipe_fs_i.h
pkt_cls.h
pkt_sched.h
pktcdvd.h
platform.h
pm.h [PATCH] swsusp: switch pm_message_t to struct 2005-09-05 00:06:16 -07:00
pmu.h
pnp.h
pnpbios.h
poll.h
posix_acl_xattr.h
posix_acl.h
posix_types.h
posix-timers.h
ppdev.h
ppp_channel.h
ppp_defs.h
ppp-comp.h
prctl.h
preempt.h
prefetch.h
prio_tree.h
proc_fs.h
profile.h
ps2esdi.h
ptrace.h [PATCH] Uml support: add PTRACE_SYSEMU_SINGLESTEP option to i386 2005-09-05 00:06:20 -07:00
qic117.h
qnx4_fs.h
qnxtypes.h
quota.h
quotaio_v1.h
quotaio_v2.h
quotaops.h
radeonfb.h
radix-tree.h
ramfs.h
random.h [RANDOM]: Introduce secure_dccp_sequence_number 2005-08-29 15:49:40 -07:00
raw.h
rbtree.h
rcupdate.h
reboot_fixups.h
reboot.h
reiserfs_acl.h
reiserfs_fs_i.h
reiserfs_fs_sb.h
reiserfs_fs.h
reiserfs_xattr.h
relayfs_fs.h [PATCH] relayfs 2005-09-07 16:57:18 -07:00
resource.h
rmap.h
romfs_fs.h
root_dev.h
rose.h
route.h
rslib.h
rtc.h
rtnetlink.h [NETLINK]: Convert netlink users to use group numbers instead of bitmasks 2005-08-29 16:00:54 -07:00
rwsem-spinlock.h
rwsem.h
sc26198.h
scatterlist.h
scc.h
sched.h [PATCH] auxiliary vector cleanups 2005-09-07 16:57:21 -07:00
sctp.h
scx200_gpio.h
scx200.h
sdla_asy.h
sdla_chdlc.h
sdla_fr.h
sdla_ppp.h
sdla_x25.h
sdla.h
sdladrv.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sdlapci.h
sdlasfm.h
seccomp.h
securebits.h
security.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
selection.h
selinux_netlink.h [NETLINK]: Convert netlink users to use group numbers instead of bitmasks 2005-08-29 16:00:54 -07:00
sem.h
seq_file.h
seqlock.h
serial167.h
serial_8250.h [SERIAL] Move serial8250_*_port prototypes to linux/serial_8250.h 2005-09-01 15:56:26 +01:00
serial_core.h [ARM] 2866/1: add i.MX set_mctrl / get_mctrl functions 2005-08-31 21:48:47 +01:00
serial_reg.h
serial.h [ARM] 2866/1: add i.MX set_mctrl / get_mctrl functions 2005-08-31 21:48:47 +01:00
serialP.h
serio.h
shm.h
shmem_fs.h
signal.h
skbuff.h [NET]: Implement SKB fast cloning. 2005-08-29 16:01:54 -07:00
slab.h
smb_fs_i.h
smb_fs_sb.h
smb_fs.h
smb_mount.h
smb.h
smbno.h
smp_lock.h
smp.h
snmp.h
socket.h [NET]: Fix sparse warnings 2005-08-29 16:01:32 -07:00
sockios.h
som.h
sonet.h
sonypi.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
sort.h
sound.h [PATCH] Assign device pointer to OSS devices 2005-08-30 08:58:37 +02:00
soundcard.h
spinlock.h
stallion.h
stat.h
statfs.h
stddef.h
stop_machine.h
string.h
stringify.h
superhyway.h
suspend.h
swap.h [PATCH] swap: swap_lock replace list+device 2005-09-05 00:05:42 -07:00
swapops.h [PATCH] comment typo fix 2005-09-05 00:05:45 -07:00
synclink.h
sys.h
syscalls.h
sysctl.h
sysdev.h
sysfs.h
sysrq.h
sysv_fs.h
tcp.h [ICSK]: Move TCP congestion avoidance members to icsk 2005-08-29 15:56:18 -07:00
telephony.h
termios.h
textsearch_fsm.h
textsearch.h
thread_info.h
threads.h
ticable.h
time.h
timer.h
times.h
timex.h
tiocl.h
topology.h
toshiba.h
transport_class.h
trdevice.h
tty_driver.h
tty_flip.h
tty_ldisc.h
tty.h
types.h [NETFILTER]: introduce and use aligned_u64 data type 2005-08-29 15:57:59 -07:00
udf_fs_i.h
udf_fs_sb.h
udf_fs.h
udp.h
ufs_fs_i.h
ufs_fs_sb.h
ufs_fs.h
uinput.h
uio.h
ultrasound.h
umem.h
un.h
unistd.h
usb_cdc.h
usb_ch9.h
usb_gadget.h
usb_gadgetfs.h
usb_input.h
usb_isp116x.h
usb_otg.h
usb_sl811.h
usb.h
usbdevice_fs.h
user.h
utime.h
uts.h
utsname.h
vermagic.h
vfs.h
via.h
video_decoder.h
video_encoder.h
videodev2.h
videodev.h
videotext.h
vmalloc.h [PATCH] arm: allow for arch-specific IOREMAP_MAX_ORDER 2005-09-05 00:05:46 -07:00
vt_buffer.h
vt_kern.h
vt.h
wait.h
wanpipe.h
wanrouter.h
watchdog.h
wavefront.h
wireless.h
workqueue.h
writeback.h
x25.h
xattr.h
xfrm.h [NETLINK]: Convert netlink users to use group numbers instead of bitmasks 2005-08-29 16:00:54 -07:00
yam.h
zconf.h
zftape.h
zlib.h
zorro_ids.h Linux-2.6.12-rc2 2005-04-16 15:20:36 -07:00
zorro.h
zutil.h