Commit 236f4532 authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 

Pull misc vfs updates from Al Viro:

 - bmap series from cmaiolino

 - getting rid of convolutions in copy_mount_options() (use a couple of
   copy_from_user() instead of the __get_user() crap)

* 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  saner copy_mount_options()
  fibmap: Reject negative block numbers
  fibmap: Use bmap instead of ->bmap method in ioctl_fibmap
  ecryptfs: drop direct calls to ->bmap
  cachefiles: drop direct usage of ->bmap method.
  fs: Enable bmap() function to properly return errors
parents 99593330 12efec56

drivers/md/md-bitmap.c

+10 −6
Original line number Diff line number Diff line
@@ -364,7 +364,7 @@ static int read_page(struct file *file, unsigned long index, 
	int ret = 0;

	struct inode *inode = file_inode(file);

	struct buffer_head *bh;

	sector_t block;

	sector_t block, blk_cur;



	pr_debug("read bitmap file (%dB @ %llu)\n", (int)PAGE_SIZE,

		 (unsigned long long)index << PAGE_SHIFT);
@@ -375,17 +375,21 @@ static int read_page(struct file *file, unsigned long index, 
		goto out;

	}

	attach_page_buffers(page, bh);

	block = index << (PAGE_SHIFT - inode->i_blkbits);

	blk_cur = index << (PAGE_SHIFT - inode->i_blkbits);

	while (bh) {

		block = blk_cur;



		if (count == 0)

			bh->b_blocknr = 0;

		else {

			bh->b_blocknr = bmap(inode, block);

			if (bh->b_blocknr == 0) {

				/* Cannot use this file! */

			ret = bmap(inode, &block);

			if (ret || !block) {

				ret = -EINVAL;

				bh->b_blocknr = 0;

				goto out;

			}



			bh->b_blocknr = block;

			bh->b_bdev = inode->i_sb->s_bdev;

			if (count < (1<<inode->i_blkbits))

				count = 0;
@@ -399,7 +403,7 @@ static int read_page(struct file *file, unsigned long index, 
			set_buffer_mapped(bh);

			submit_bh(REQ_OP_READ, 0, bh);

		}

		block++;

		blk_cur++;

		bh = bh->b_this_page;

	}

	page->index = index;

fs/cachefiles/rdwr.c

+14 −13
Original line number Diff line number Diff line
@@ -396,7 +396,7 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, 
	struct cachefiles_object *object;

	struct cachefiles_cache *cache;

	struct inode *inode;

	sector_t block0, block;

	sector_t block;

	unsigned shift;

	int ret;
@@ -412,7 +412,6 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, 


	inode = d_backing_inode(object->backer);

	ASSERT(S_ISREG(inode->i_mode));

	ASSERT(inode->i_mapping->a_ops->bmap);

	ASSERT(inode->i_mapping->a_ops->readpages);



	/* calculate the shift required to use bmap */
@@ -428,12 +427,14 @@ int cachefiles_read_or_alloc_page(struct fscache_retrieval *op, 
	 *   enough for this as it doesn't indicate errors, but it's all we've

	 *   got for the moment

	 */

	block0 = page->index;

	block0 <<= shift;

	block = page->index;

	block <<= shift;



	ret = bmap(inode, &block);

	ASSERT(ret < 0);



	block = inode->i_mapping->a_ops->bmap(inode->i_mapping, block0);

	_debug("%llx -> %llx",

	       (unsigned long long) block0,

	       (unsigned long long) (page->index << shift),

	       (unsigned long long) block);



	if (block) {
@@ -711,7 +712,6 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, 


	inode = d_backing_inode(object->backer);

	ASSERT(S_ISREG(inode->i_mode));

	ASSERT(inode->i_mapping->a_ops->bmap);

	ASSERT(inode->i_mapping->a_ops->readpages);



	/* calculate the shift required to use bmap */
@@ -728,7 +728,7 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, 


	ret = space ? -ENODATA : -ENOBUFS;

	list_for_each_entry_safe(page, _n, pages, lru) {

		sector_t block0, block;

		sector_t block;



		/* we assume the absence or presence of the first block is a

		 * good enough indication for the page as a whole
@@ -736,13 +736,14 @@ int cachefiles_read_or_alloc_pages(struct fscache_retrieval *op, 
		 *   good enough for this as it doesn't indicate errors, but

		 *   it's all we've got for the moment

		 */

		block0 = page->index;

		block0 <<= shift;

		block = page->index;

		block <<= shift;



		ret = bmap(inode, &block);

		ASSERT(!ret);



		block = inode->i_mapping->a_ops->bmap(inode->i_mapping,

						      block0);

		_debug("%llx -> %llx",

		       (unsigned long long) block0,

		       (unsigned long long) (page->index << shift),

		       (unsigned long long) block);



		if (block) {

fs/ecryptfs/mmap.c

+6 −10
Original line number Diff line number Diff line
@@ -524,16 +524,12 @@ out: 


static sector_t ecryptfs_bmap(struct address_space *mapping, sector_t block)

{

	int rc = 0;

	struct inode *inode;

	struct inode *lower_inode;



	inode = (struct inode *)mapping->host;

	lower_inode = ecryptfs_inode_to_lower(inode);

	if (lower_inode->i_mapping->a_ops->bmap)

		rc = lower_inode->i_mapping->a_ops->bmap(lower_inode->i_mapping,

							 block);

	return rc;

	struct inode *lower_inode = ecryptfs_inode_to_lower(mapping->host);

	int ret = bmap(lower_inode, &block);



	if (ret)

		return 0;

	return block;

}



const struct address_space_operations ecryptfs_aops = {

fs/f2fs/data.c

+11 −5
Original line number Diff line number Diff line
@@ -3666,12 +3666,16 @@ static int check_swap_activate(struct swap_info_struct *sis, 
			page_no < sis->max) {

		unsigned block_in_page;

		sector_t first_block;

		sector_t block = 0;

		int	 err = 0;



		cond_resched();



		first_block = bmap(inode, probe_block);

		if (first_block == 0)

		block = probe_block;

		err = bmap(inode, &block);

		if (err || !block)

			goto bad_bmap;

		first_block = block;



		/*

		 * It must be PAGE_SIZE aligned on-disk
@@ -3683,11 +3687,13 @@ static int check_swap_activate(struct swap_info_struct *sis, 


		for (block_in_page = 1; block_in_page < blocks_per_page;

					block_in_page++) {

			sector_t block;



			block = bmap(inode, probe_block + block_in_page);

			if (block == 0)

			block = probe_block + block_in_page;

			err = bmap(inode, &block);



			if (err || !block)

				goto bad_bmap;



			if (block != first_block + block_in_page) {

				/* Discontiguity */

				probe_block++;

fs/inode.c

+19 −13
Original line number Diff line number Diff line
@@ -1599,25 +1599,31 @@ retry: 
}

EXPORT_SYMBOL(iput);



#ifdef CONFIG_BLOCK

/**

 *	bmap	- find a block number in a file

 *	@inode: inode of file

 *	@block: block to find

 *	@inode:  inode owning the block number being requested

 *	@block: pointer containing the block to find

 *

 *	Returns the block number on the device holding the inode that

 *	is the disk block number for the block of the file requested.

 *	That is, asked for block 4 of inode 1 the function will return the

 *	disk block relative to the disk start that holds that block of the

 *	file.

 *	Replaces the value in *block with the block number on the device holding

 *	corresponding to the requested block number in the file.

 *	That is, asked for block 4 of inode 1 the function will replace the

 *	4 in *block, with disk block relative to the disk start that holds that

 *	block of the file.

 *

 *	Returns -EINVAL in case of error, 0 otherwise. If mapping falls into a

 *	hole, returns 0 and *block is also set to 0.

 */

sector_t bmap(struct inode *inode, sector_t block)

int bmap(struct inode *inode, sector_t *block)

{

	sector_t res = 0;

	if (inode->i_mapping->a_ops->bmap)

		res = inode->i_mapping->a_ops->bmap(inode->i_mapping, block);

	return res;

	if (!inode->i_mapping->a_ops->bmap)

		return -EINVAL;



	*block = inode->i_mapping->a_ops->bmap(inode->i_mapping, *block);

	return 0;

}

EXPORT_SYMBOL(bmap);

#endif



/*

 * With relative atime, only update atime if the previous atime is

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