linux-toradex.git/fs/ext4/ext4.h, branch v4.5

ext4 crypto: revalidate dentry after adding or removing the key

2016-02-08T00:35:05+00:00

Add a validation check for dentries for encrypted directory to make
sure we're not caching stale data after a key has been added or removed.

Also check to make sure that status of the encryption key is updated
when readdir(2) is executed.

Signed-off-by: Theodore Ts'o

wrappers for ->i_mutex access

2016-01-22T23:04:28+00:00

parallel to mutex_{lock,unlock,trylock,is_locked,lock_nested},
inode_foo(inode) being mutex_foo(&inode->i_mutex).

Please, use those for access to ->i_mutex; over the coming cycle
->i_mutex will become rwsem, with ->lookup() done with it held
only shared.

Signed-off-by: Al Viro

ext4: add FS_IOC_FSSETXATTR/FS_IOC_FSGETXATTR interface support

2016-01-08T21:01:22+00:00

This patch adds FS_IOC_FSSETXATTR/FS_IOC_FSGETXATTR ioctl interface
support for ext4. The interface is kept consistent with
XFS_IOC_FSGETXATTR/XFS_IOC_FSGETXATTR.

Signed-off-by: Li Xi 
Signed-off-by: Theodore Ts'o 
Reviewed-by: Andreas Dilger 
Reviewed-by: Jan Kara

ext4: add project quota support

2016-01-08T21:01:22+00:00

This patch adds mount options for enabling/disabling project quota
accounting and enforcement. A new specific inode is also used for
project quota accounting.

[ Includes fix from Dan Carpenter to crrect error checking from dqget(). ]

Signed-off-by: Li Xi 
Signed-off-by: Dmitry Monakhov 
Signed-off-by: Theodore Ts'o 
Reviewed-by: Andreas Dilger 
Reviewed-by: Jan Kara

ext4: adds project ID support

2016-01-08T21:01:21+00:00

Signed-off-by: Li Xi 
Signed-off-by: Theodore Ts'o 
Reviewed-by: Andreas Dilger 
Reviewed-by: Jan Kara

ext4 crypto: simplify interfaces to directory entry insert functions

2016-01-08T21:00:31+00:00

A number of functions include ext4_add_dx_entry, make_indexed_dir,
etc. are being passed a dentry even though the only thing they use is
the containing parent.  We can shrink the code size slightly by making
this replacement.  This will also be useful in cases where we don't
have a dentry as the argument to the directory entry insert functions.

Signed-off-by: Theodore Ts'o

ext4: use pre-zeroed blocks for DAX page faults

2015-12-07T20:10:44+00:00

Make DAX fault path use pre-zeroed blocks to avoid races with extent
conversion and zeroing when two page faults to the same block happen.

Signed-off-by: Jan Kara 
Signed-off-by: Theodore Ts'o

ext4: implement allocation of pre-zeroed blocks

2015-12-07T20:10:26+00:00

DAX page fault path needs to get blocks that are pre-zeroed to avoid
races when two concurrent page faults happen in the same block of a
file. Implement support for this in ext4_map_blocks().

Signed-off-by: Jan Kara 
Signed-off-by: Theodore Ts'o

ext4: provide ext4_issue_zeroout()

2015-12-07T20:09:35+00:00

Create new function ext4_issue_zeroout() to zeroout contiguous (both
logically and physically) part of inode data. We will need to issue
zeroout when extent structure is not readily available and this function
will allow us to do it without making up fake extent structures.

Signed-off-by: Jan Kara 
Signed-off-by: Theodore Ts'o

ext4: get rid of EXT4_GET_BLOCKS_NO_LOCK flag

2015-12-07T20:04:57+00:00

When dioread_nolock mode is enabled, we grab i_data_sem in
ext4_ext_direct_IO() and therefore we need to instruct _ext4_get_block()
not to grab i_data_sem again using EXT4_GET_BLOCKS_NO_LOCK. However
holding i_data_sem over overwrite direct IO isn't needed these days. We
have exclusion against truncate / hole punching because we increase
i_dio_count under i_mutex in ext4_ext_direct_IO() so once
ext4_file_write_iter() verifies blocks are allocated & written, they are
guaranteed to stay so during the whole direct IO even after we drop
i_mutex.

So we can just remove this locking abuse and the no longer necessary
EXT4_GET_BLOCKS_NO_LOCK flag.

Signed-off-by: Jan Kara 
Signed-off-by: Theodore Ts'o