kernel.git/fs/btrfs/super.c, branch linux-3.17.y

btrfs: fix wrong accounting of raid1 data profile in statfs

2015-01-08T18:27:49Z

commit 0d95c1bec906dd1ad951c9c001e798ca52baeb0f upstream. The sizes that are obtained from space infos are in raw units and have to be adjusted according to the raid factor. This was missing for f_bavail and df reported doubled size for raid1. Reported-by: Martin Steigerwald Fixes: ba7b6e62f420 ("btrfs: adjust statfs calculations according to raid profiles") Signed-off-by: David Sterba Signed-off-by: Chris Mason Signed-off-by: Greg Kroah-Hartman

Merge branch 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs

2014-08-16T15:06:55Z

Pull btrfs updates from Chris Mason: "These are all fixes I'd like to get out to a broader audience. The biggest of the bunch is Mark's quota fix, which is also in the SUSE kernel, and makes our subvolume quotas dramatically more accurate. I've been running xfstests with these against your current git overnight, but I'm queueing up longer tests as well" * 'for-linus2' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: btrfs: disable strict file flushes for renames and truncates Btrfs: fix csum tree corruption, duplicate and outdated checksums Btrfs: Fix memory corruption by ulist_add_merge() on 32bit arch Btrfs: fix compressed write corruption on enospc btrfs: correctly handle return from ulist_add btrfs: qgroup: account shared subtrees during snapshot delete Btrfs: read lock extent buffer while walking backrefs Btrfs: __btrfs_mod_ref should always use no_quota btrfs: adjust statfs calculations according to raid profiles

btrfs: adjust statfs calculations according to raid profiles

2014-08-15T14:43:10Z

This has been discussed in thread: http://thread.gmane.org/gmane.comp.file-systems.btrfs/32528 and this patch implements this proposal: http://thread.gmane.org/gmane.comp.file-systems.btrfs/32536 Works fine for "clean" raid profiles where the raid factor correction does the right job. Otherwise it's pessimistic and may show low space although there's still some left. The df nubmers are lightly wrong in case of mixed block groups, but this is not a major usecase and can be addressed later. The RAID56 numbers are wrong almost the same way as before and will be addressed separately. CC: Hugo Mills CC: cwillu CC: Josef Bacik Signed-off-by: David Sterba Signed-off-by: Chris Mason

dcache: d_obtain_alias callers don't all want DISCONNECTED

2014-08-07T18:40:10Z

There are a few d_obtain_alias callers that are using it to get the root of a filesystem which may already have an alias somewhere else. This is not the same as the filehandle-lookup case, and none of them actually need DCACHE_DISCONNECTED set. It isn't really a serious problem, but it would really be clearer if we reserved DCACHE_DISCONNECTED for those cases where it's actually needed. In the btrfs case this was causing a spurious printk from nfsd/nfsfh.c:fh_verify when it found an unexpected DCACHE_DISCONNECTED dentry. Josef worked around this by unsetting DCACHE_DISCONNECTED manually in 3a0dfa6a12e "Btrfs: unset DCACHE_DISCONNECTED when mounting default subvol", and this replaces that workaround. Cc: Josef Bacik Signed-off-by: J. Bruce Fields Signed-off-by: Al Viro

btrfs: fix null pointer dereference in btrfs_show_devname when name is null

2014-07-03T14:04:09Z

dev->name is null but missing flag is not set. Strictly speaking the missing flag should have been set, but there are more places where code just checks if name is null. For now this patch does the same. stack: BUG: unable to handle kernel NULL pointer dereference at 0000000000000064 IP: [] btrfs_show_devname+0x58/0xf0 [btrfs] [] show_vfsmnt+0x39/0x130 [] m_show+0x16/0x20 [] seq_read+0x296/0x390 [] vfs_read+0x9d/0x160 [] SyS_read+0x49/0x90 [] system_call_fastpath+0x16/0x1b reproducer: mkfs.btrfs -draid1 -mraid1 /dev/sdg1 /dev/sdg2 btrfstune -S 1 /dev/sdg1 modprobe -r btrfs && modprobe btrfs mount -o degraded /dev/sdg1 /btrfs btrfs dev add /dev/sdg3 /btrfs Signed-off-by: Anand Jain Signed-off-by: Chris Mason

btrfs: fix nossd and ssd_spread mount option regression

2014-07-03T14:04:06Z

The commit 0780253 btrfs: Cleanup the btrfs_parse_options for remount. broke ssd options quite badly; it stopped making ssd_spread imply ssd, and it made "nossd" unsettable. Put things back at least as well as they were before (though ssd mount option handling is still pretty odd: # mount -o "nossd,ssd_spread" works?) Reported-by: Roman Mamedov Signed-off-by: Eric Sandeen Signed-off-by: Chris Mason

Btrfs: fix race between balance recovery and root deletion

2014-07-03T14:04:04Z

Balance recovery is called when RW mounting or remounting from RO to RW, it is called to finish roots merging. When doing balance recovery, relocation root's corresponding fs root(whose root refs is 0) might be destroyed by cleaner thread, this will make btrfs fail to mount. Fix this problem by holding @cleaner_mutex when doing balance recovery. Signed-off-by: Wang Shilong Signed-off-by: Chris Mason

btrfs: remove stale newlines from log messages

2014-06-10T00:20:53Z

I've noticed an extra line after "use no compression", but search revealed much more in messages of more critical levels and rare errors. Signed-off-by: David Sterba Signed-off-by: Chris Mason

Btrfs: remove OPT_acl parse when acl disabled

2014-06-10T00:20:50Z

Even CONFIG_BTRFS_FS_POSIX_ACL is not defined, the acl still could been enabled using a mount option, and now fs/btrfs/acl.o is not built, so the mount options will appear to be supported but will be silently ignored. Signed-off-by: Guangliang Zhao Reviewed-by: David Sterba Signed-off-by: Chris Mason

Btrfs: add sanity tests for new qgroup accounting code

2014-06-10T00:20:49Z

This exercises the various parts of the new qgroup accounting code. We do some basic stuff and do some things with the shared refs to make sure all that code works. I had to add a bunch of infrastructure because I needed to be able to insert items into a fake tree without having to do all the hard work myself, hopefully this will be usefull in the future. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason