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vfs: pass remap flags to generic_remap_file_range_prep

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Plumb the remap flags through the filesystem from the vfs function
dispatcher all the way to the prep function to prepare for behavior
changes in subsequent patches.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Amir Goldstein <amir73il@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong
2018-10-30 10:41:28 +11:00
committed by Dave Chinner
parent 2e5dfc99f2
commit a91ae49bba
8 changed files with 26 additions and 24 deletions
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14
fs/read_write.c
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@@ -1722,14 +1722,14 @@ static int generic_remap_check_len(struct inode *inode_in,
struct inode *inode_out,
loff_t pos_out,
u64 *len,
bool is_dedupe)
unsigned int remap_flags)
{
u64 blkmask = i_blocksize(inode_in) - 1;
if ((*len & blkmask) == 0)
return 0;
if (is_dedupe)
if (remap_flags & REMAP_FILE_DEDUP)
*len &= ~blkmask;
else if (pos_out + *len < i_size_read(inode_out))
return -EINVAL;
@@ -1747,7 +1747,7 @@ static int generic_remap_check_len(struct inode *inode_in,
*/
int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out,
u64 *len, bool is_dedupe)
u64 *len, unsigned int remap_flags)
{
struct inode *inode_in = file_inode(file_in);
struct inode *inode_out = file_inode(file_out);
@@ -1771,7 +1771,7 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
if (*len == 0) {
loff_t isize = i_size_read(inode_in);
if (is_dedupe || pos_in == isize)
if ((remap_flags & REMAP_FILE_DEDUP) || pos_in == isize)
return 0;
if (pos_in > isize)
return -EINVAL;
@@ -1782,7 +1782,7 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
/* Check that we don't violate system file offset limits. */
ret = generic_remap_checks(file_in, pos_in, file_out, pos_out, len,
is_dedupe);
(remap_flags & REMAP_FILE_DEDUP));
if (ret)
return ret;
@@ -1804,7 +1804,7 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
/*
* Check that the extents are the same.
*/
if (is_dedupe) {
if (remap_flags & REMAP_FILE_DEDUP) {
bool is_same = false;
ret = vfs_dedupe_file_range_compare(inode_in, pos_in,
@@ -1816,7 +1816,7 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
}
ret = generic_remap_check_len(inode_in, inode_out, pos_out, len,
is_dedupe);
remap_flags);
if (ret)
return ret;