BMC/Intel-BMC/linux.git/fs/nilfs2/sufile.c, branch dev

nilfs2: verify metadata sizes read from disk

2014-04-03T23:21:26+00:00

Add code to check sizes of on-disk data of metadata files such as inode size, segment usage size, DAT entry size, and checkpoint size. Although these sizes are read from disk, the current implementation doesn't check them. If these sizes are not sane on disk, it can cause out-of-range access to metadata or memory access overrun on metadata block buffers due to overflow in sundry calculations. Both lower limit and upper limit of metadata sizes are verified to prevent these issues. Signed-off-by: Ryusuke Konishi Cc: Andreas Rohner Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nilfs2: add nilfs_sufile_trim_fs to trim clean segs

2014-04-03T23:21:25+00:00

Add nilfs_sufile_trim_fs(), which takes an fstrim_range structure and calls blkdev_issue_discard for every clean segment in the specified range. The range is truncated to file system block boundaries. Signed-off-by: Andreas Rohner Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nilfs2: add nilfs_sufile_set_suinfo to update segment usage

2014-04-03T23:21:25+00:00

Introduce nilfs_sufile_set_suinfo(), which expects an array of nilfs_suinfo_update structures and updates the segment usage information accordingly. This is basically a helper function for the newly introduced NILFS_IOCTL_SET_SUINFO ioctl. [konishi.ryusuke@lab.ntt.co.jp: use put_bh() instead of brelse() because we know bh != NULL] Signed-off-by: Andreas Rohner Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nilfs2: add omitted comments for different structures in driver implementation

2012-07-31T00:25:19+00:00

Add omitted comments for different structures in driver implementation. Signed-off-by: Vyacheslav Dubeyko Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nilfs2: remove the second argument of k[un]map_atomic()

2012-03-20T13:48:24+00:00

Acked-by: Ryusuke Konishi Signed-off-by: Cong Wang

nilfs2: use mark_buffer_dirty to mark btnode or meta data dirty

2011-05-10T13:21:57+00:00

This replaces nilfs_mdt_mark_buffer_dirty and nilfs_btnode_mark_dirty macros with mark_buffer_dirty and gets rid of nilfs_mark_buffer_dirty, an own mark buffer dirty function. Signed-off-by: Ryusuke Konishi

nilfs2: get rid of NILFS_I_NILFS

2011-05-10T13:21:56+00:00

This replaces all references of NILFS_I_NILFS(inode)->ns_bdev with inode->i_sb->s_bdev and unfolds remaining uses of NILFS_I_NILFS inline function. Before 2.6.37, referring to a nilfs object from inodes needed a conditional judgement, and NILFS_I_NILFS was helpful to simplify it. But now we can simply do it by going through a super block instance like inode->i_sb->s_fs_info. Signed-off-by: Ryusuke Konishi

nilfs2: implement resize ioctl

2011-05-10T13:21:46+00:00

This adds resize ioctl which makes online resize possible. Signed-off-by: Ryusuke Konishi

nilfs2: add truncation routine of segment usage file

2011-05-10T13:21:45+00:00

When shrinking the filesystem, segments to be truncated must be test if they are busy or not, and unneeded sufile block should be deleted. This adds routines for the truncation. Signed-off-by: Ryusuke Konishi

nilfs2: add ioctl which limits range of segment to be allocated

2011-05-10T13:21:45+00:00

This adds a new ioctl command which limits range of segment to be allocated. This is intended to gather data whithin a range of the partition before shrinking the filesystem, or to control new log location for some purpose. If a range is specified by the ioctl, segment allocator of nilfs tries to allocate new segments from the range unless no free segments are available there. Signed-off-by: Ryusuke Konishi