user/sven/linux.git/include/linux/nilfs2_fs.h, branch v3.16.67

nilfs2: fix sanity check of btree level in nilfs_btree_root_broken()

2015-05-20T12:26:08Z

commit d8fd150fe3935e1692bf57c66691e17409ebb9c1 upstream. The range check for b-tree level parameter in nilfs_btree_root_broken() is wrong; it accepts the case of "level == NILFS_BTREE_LEVEL_MAX" even though the level is limited to values in the range of 0 to (NILFS_BTREE_LEVEL_MAX - 1). Since the level parameter is read from storage device and used to index nilfs_btree_path array whose element count is NILFS_BTREE_LEVEL_MAX, it can cause memory overrun during btree operations if the boundary value is set to the level parameter on device. This fixes the broken sanity check and adds a comment to clarify that the upper bound NILFS_BTREE_LEVEL_MAX is exclusive. Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds Signed-off-by: Luis Henriques

nilfs2: verify metadata sizes read from disk

2014-04-03T23:21:26Z

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: implementation of NILFS_IOCTL_SET_SUINFO ioctl

2014-04-03T23:21:25Z

With this ioctl the segment usage entries in the SUFILE can be updated from userspace. This is useful, because it allows the userspace GC to modify and update segment usage entries for specific segments, which enables it to avoid unnecessary write operations. If a segment needs to be cleaned, but there is no or very little reclaimable space in it, the cleaning operation basically degrades to a useless moving operation. In the end the only thing that changes is the location of the data and a timestamp in the segment usage information. With this ioctl the GC can skip the cleaning and update the segment usage entries directly instead. This is basically a shortcut to cleaning the segment. It is still necessary to read the segment summary information, but the writing of the live blocks can be skipped if it's not worth it. [konishi.ryusuke@lab.ntt.co.jp: add description of NILFS_IOCTL_SET_SUINFO ioctl] Signed-off-by: Andreas Rohner Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

nilfs2: add struct nilfs_suinfo_update and flags

2014-04-03T23:21:25Z

Add the nilfs_suinfo_update structure, which contains the information needed to update one segment usage entry. The flags specify, which fields need to be updated. 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 structures in nilfs2_fs.h

2012-07-31T00:25:19Z

Add omitted comments for structures in nilfs2_fs.h. Signed-off-by: Vyacheslav Dubeyko Signed-off-by: Ryusuke Konishi Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

BUG: headers with BUG/BUG_ON etc. need linux/bug.h

2012-03-04T22:54:34Z

If a header file is making use of BUG, BUG_ON, BUILD_BUG_ON, or any other BUG variant in a static inline (i.e. not in a #define) then that header really should be including and not just expecting it to be implicitly present. We can make this change risk-free, since if the files using these headers didn't have exposure to linux/bug.h already, they would have been causing compile failures/warnings. Signed-off-by: Paul Gortmaker

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

2011-05-10T13:21:45Z

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

nilfs2: super root size should change depending on inode size

2011-05-10T13:21:44Z

The size of super root structure depends on inode size, so NILFS_SR_BYTES macro should be a function of the inode size. This fixes the issue. Even though a different size value will be written for a possible future filesystem with extended inode, but fortunately this does not break disk format compatibility. Signed-off-by: Ryusuke Konishi

nilfs2: move NILFS_SUPER_MAGIC to linux/magic.h

2011-03-10T08:29:40Z

move NILFS_SUPER_MAGIC macro to linux/magic.h from linux/nilfs2_fs.h in the same manner as other filesystem magic number defined in the file. Signed-off-by: Jiro SEKIBA Signed-off-by: Ryusuke Konishi

nilfs2: record used amount of each checkpoint in checkpoint list

2011-03-08T05:58:31Z

This records the number of used blocks per checkpoint in each checkpoint entry of cpfile. Even though userland tools can get the block count via nilfs_get_cpinfo ioctl, it was not updated by the nilfs2 kernel code. This fixes the issue and makes it available for userland tools to calculate used amount per checkpoint. Signed-off-by: Ryusuke Konishi Cc: Jiro SEKIBA