BMC/Intel-BMC/linux.git/fs/quota, branch dev-4.6

quota: Handle Q_GETNEXTQUOTA when quota is disabled

2016-03-29T15:20:10+00:00

Currently we oopsed when Q_GETNEXTQUOTA got called when quota was disabled. Properly check whether quota is enabled for the filesystem before calling into quota format handler. Reported-by: Ted Tso Signed-off-by: Jan Kara

Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs

2016-03-21T19:22:37+00:00

Pull UDF and quota updates from Jan Kara: "This contains a rewrite of UDF handling of filename encoding to fix remaining overflow issues from Andrew Gabbasov and quota changes to support new Q_[X]GETNEXTQUOTA quotactl for VFS quota formats" * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs: quota: Fix possible GPF due to uninitialised pointers ext4: Make Q_GETNEXTQUOTA work for quota in hidden inodes quota: Forbid Q_GETQUOTA and Q_GETNEXTQUOTA for frozen filesystem quota: Fix possible races during quota loading ocfs2: Implement get_next_id() quota_v2: Implement get_next_id() for V2 quota format quota: Add support for ->get_nextdqblk() for VFS quota udf: Merge linux specific translation into CS0 conversion function udf: Remove struct ustr as non-needed intermediate storage udf: Use separate buffer for copying split names udf: Adjust UDF_NAME_LEN to better reflect actual restrictions udf: Join functions for UTF8 and NLS conversions udf: Parameterize output length in udf_put_filename quota: Allow Q_GETQUOTA for frozen filesystem quota: Fixup comments about return value of Q_[X]GETNEXTQUOTA

Merge tag 'xfs-for-linus-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs

2016-03-21T18:53:05+00:00

Pull xfs updates from Dave Chinner: "There's quite a lot in this request, and there's some cross-over with ext4, dax and quota code due to the nature of the changes being made. As for the rest of the XFS changes, there are lots of little things all over the place, which add up to a lot of changes in the end. The major changes are that we've reduced the size of the struct xfs_inode by ~100 bytes (gives an inode cache footprint reduction of >10%), the writepage code now only does a single set of mapping tree lockups so uses less CPU, delayed allocation reservations won't overrun under random write loads anymore, and we added compile time verification for on-disk structure sizes so we find out when a commit or platform/compiler change breaks the on disk structure as early as possible. Change summary: - error propagation for direct IO failures fixes for both XFS and ext4 - new quota interfaces and XFS implementation for iterating all the quota IDs in the filesystem - locking fixes for real-time device extent allocation - reduction of duplicate information in the xfs and vfs inode, saving roughly 100 bytes of memory per cached inode. - buffer flag cleanup - rework of the writepage code to use the generic write clustering mechanisms - several fixes for inode flag based DAX enablement - rework of remount option parsing - compile time verification of on-disk format structure sizes - delayed allocation reservation overrun fixes - lots of little error handling fixes - small memory leak fixes - enable xfsaild freezing again" * tag 'xfs-for-linus-4.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs: (66 commits) xfs: always set rvalp in xfs_dir2_node_trim_free xfs: ensure committed is initialized in xfs_trans_roll xfs: borrow indirect blocks from freed extent when available xfs: refactor delalloc indlen reservation split into helper xfs: update freeblocks counter after extent deletion xfs: debug mode forced buffered write failure xfs: remove impossible condition xfs: check sizes of XFS on-disk structures at compile time xfs: ioends require logically contiguous file offsets xfs: use named array initializers for log item dumping xfs: fix computation of inode btree maxlevels xfs: reinitialise per-AG structures if geometry changes during recovery xfs: remove xfs_trans_get_block_res xfs: fix up inode32/64 (re)mount handling xfs: fix format specifier , should be %llx and not %llu xfs: sanitize remount options xfs: convert mount option parsing to tokens xfs: fix two memory leaks in xfs_attr_list.c error paths xfs: XFS_DIFLAG2_DAX limited by PAGE_SIZE xfs: dynamically switch modes when XFS_DIFLAG2_DAX is set/cleared ...

quota: use lookup_one_len_unlocked()

2016-03-14T04:16:48+00:00

Signed-off-by: Al Viro

quota: Fix possible GPF due to uninitialised pointers

2016-03-03T10:01:58+00:00

When dqget() in __dquot_initialize() fails e.g. due to IO error, __dquot_initialize() will pass an array of uninitialized pointers to dqput_all() and thus can lead to deference of random data. Fix the problem by properly initializing the array. CC: stable@vger.kernel.org Signed-off-by: Nikolay Borisov Signed-off-by: Jan Kara

quota: Forbid Q_GETQUOTA and Q_GETNEXTQUOTA for frozen filesystem

2016-02-18T13:03:03+00:00

Commit 7955118eafc4 (quota: Allow Q_GETQUOTA for frozen filesystem) allowed Q_GETQUOTA call for frozen filesystem. It makes sense on the first look but zero-day testing has shown that with this change ext4 warns about starting a transaction for frozen filesystem. This happens because ext4_acquire_dquot() prepares for allocating space for new quota structure. Although it would be possible to implement Q_GETQUOTA for ext4 without allocating space for non-existent structures, the matter further complicates because OCFS2 needs to update on-disk structure use count when a new cluster node loads quota information from disk. So just revert the change and forbid Q_GETQUOTA together with Q_GETNEXTQUOTA for frozen filesystem. Add comment to quotactl_cmd_write() to save us from repeating this excercise in a few years when I forget again. Signed-off-by: Jan Kara

quota: Fix possible races during quota loading

2016-02-18T12:34:41+00:00

When loading new quota structure from disk, there is a possibility caller of dqget() will see uninitialized data due to CPU reordering loads or stores - loads from dquot can be reordered before test of DQ_ACTIVE_B bit or setting of this bit could be reordered before filling of the structure. Fix the issue by adding proper memory barriers. Signed-off-by: Jan Kara

quota_v2: Implement get_next_id() for V2 quota format

2016-02-09T12:05:23+00:00

Implement functions to get id of next existing quota structure in quota file for quota tree based formats and thus for V2 quota format. Signed-off-by: Jan Kara

quota: Add support for ->get_nextdqblk() for VFS quota

2016-02-09T12:05:23+00:00

Add infrastructure for supporting get_nextdqblk() callback for VFS quotas. Translate the operation into a callback to appropriate filesystem and consequently to quota format callback. Signed-off-by: Jan Kara

quota: Allow Q_GETQUOTA for frozen filesystem

2016-02-09T12:05:23+00:00

quota_cmd_write() forgot to list Q_GETQUOTA among commands allowed for frozen filesystem. Thus Q_GETQUOTA quotactl would unnecessarily block on frozen filesystems. Fix the issue by properly listing Q_GETQUOTA. Signed-off-by: Jan Kara