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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
Download Patch File Download Diff File Expand all files Collapse all files

2
fs/xfs/xfs_file.c
View File

@@ -932,7 +932,7 @@ xfs_file_remap_range(
return -EINVAL;
return xfs_reflink_remap_range(file_in, pos_in, file_out, pos_out,
len, remap_flags & REMAP_FILE_DEDUP);
len, remap_flags);
}
STATIC int

21
fs/xfs/xfs_reflink.c
View File

@@ -921,13 +921,14 @@ xfs_reflink_update_dest(
struct xfs_inode *dest,
xfs_off_t newlen,
xfs_extlen_t cowextsize,
bool is_dedupe)
unsigned int remap_flags)
{
struct xfs_mount *mp = dest->i_mount;
struct xfs_trans *tp;
int error;
if (is_dedupe && newlen <= i_size_read(VFS_I(dest)) && cowextsize == 0)
if ((remap_flags & REMAP_FILE_DEDUP) &&
newlen <= i_size_read(VFS_I(dest)) && cowextsize == 0)
return 0;
error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
@@ -948,7 +949,7 @@ xfs_reflink_update_dest(
dest->i_d.di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
}
if (!is_dedupe) {
if (!(remap_flags & REMAP_FILE_DEDUP)) {
xfs_trans_ichgtime(tp, dest,
XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
}
@@ -1296,7 +1297,7 @@ xfs_reflink_remap_prep(
struct file *file_out,
loff_t pos_out,
u64 *len,
bool is_dedupe)
unsigned int remap_flags)
{
struct inode *inode_in = file_inode(file_in);
struct xfs_inode *src = XFS_I(inode_in);
@@ -1327,7 +1328,7 @@ xfs_reflink_remap_prep(
goto out_unlock;
ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
len, is_dedupe);
len, remap_flags);
if (ret <= 0)
goto out_unlock;
@@ -1336,7 +1337,7 @@ xfs_reflink_remap_prep(
* from the source file so we don't try to dedupe the partial
* EOF block.
*/
if (is_dedupe) {
if (remap_flags & REMAP_FILE_DEDUP) {
*len &= ~blkmask;
} else if (*len & blkmask) {
/*
@@ -1372,7 +1373,7 @@ xfs_reflink_remap_prep(
PAGE_ALIGN(pos_out + *len) - 1);
/* If we're altering the file contents... */
if (!is_dedupe) {
if (!(remap_flags & REMAP_FILE_DEDUP)) {
/*
* ...update the timestamps (which will grab the ilock again
* from xfs_fs_dirty_inode, so we have to call it before we
@@ -1410,7 +1411,7 @@ xfs_reflink_remap_range(
struct file *file_out,
loff_t pos_out,
u64 len,
bool is_dedupe)
unsigned int remap_flags)
{
struct inode *inode_in = file_inode(file_in);
struct xfs_inode *src = XFS_I(inode_in);
@@ -1430,7 +1431,7 @@ xfs_reflink_remap_range(
/* Prepare and then clone file data. */
ret = xfs_reflink_remap_prep(file_in, pos_in, file_out, pos_out,
&len, is_dedupe);
&len, remap_flags);
if (ret <= 0)
return ret;
@@ -1457,7 +1458,7 @@ xfs_reflink_remap_range(
cowextsize = src->i_d.di_cowextsize;
ret = xfs_reflink_update_dest(dest, pos_out + len, cowextsize,
is_dedupe);
remap_flags);
out_unlock:
xfs_reflink_remap_unlock(file_in, file_out);

3
fs/xfs/xfs_reflink.h
View File

@@ -28,7 +28,8 @@ extern int xfs_reflink_end_cow(struct xfs_inode *ip, xfs_off_t offset,
xfs_off_t count);
extern int xfs_reflink_recover_cow(struct xfs_mount *mp);
extern int xfs_reflink_remap_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, u64 len, bool is_dedupe);
struct file *file_out, loff_t pos_out, u64 len,
unsigned int remap_flags);
extern int xfs_reflink_inode_has_shared_extents(struct xfs_trans *tp,
struct xfs_inode *ip, bool *has_shared);
extern int xfs_reflink_clear_inode_flag(struct xfs_inode *ip,