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ocfs2: remove ocfs2_reflink_remap_range

Browse source 
Since ocfs2_remap_file_range is a thin shell around
ocfs2_remap_remap_range, move everything from the latter into the
former.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Darrick J. Wong 2018-10-30 10:45:48 +11:00 • committed by Dave Chinner
parent 900611a1bd
commit 65f098e91f
3 changed files with 102 additions and 103 deletions
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68
fs/ocfs2/file.c
View file

@ -2531,11 +2531,75 @@ static loff_t ocfs2_remap_file_range(struct file *file_in, loff_t pos_in,
struct file *file_out, loff_t pos_out, struct file *file_out, loff_t pos_out,
loff_t len, unsigned int remap_flags) loff_t len, unsigned int remap_flags)
{ {
struct inode *inode_in = file_inode(file_in);
struct inode *inode_out = file_inode(file_out);
struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
struct buffer_head *in_bh = NULL, *out_bh = NULL;
bool same_inode = (inode_in == inode_out);
loff_t remapped = 0;
ssize_t ret;
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY)) if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL; return -EINVAL;
if (!ocfs2_refcount_tree(osb))
return -EOPNOTSUPP;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;
return ocfs2_reflink_remap_range(file_in, pos_in, file_out, pos_out, /* Lock both files against IO */
len, remap_flags); ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
if (ret)
return ret;
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
goto out_unlock;
ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
&len, remap_flags);
if (ret < 0 || len == 0)
goto out_unlock;
/* Lock out changes to the allocation maps and remap. */
down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
SINGLE_DEPTH_NESTING);
/* Zap any page cache for the destination file's range. */
truncate_inode_pages_range(&inode_out->i_data,
round_down(pos_out, PAGE_SIZE),
round_up(pos_out + len, PAGE_SIZE) - 1);
remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
inode_out, out_bh, pos_out, len);
up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
if (remapped < 0) {
ret = remapped;
mlog_errno(ret);
goto out_unlock;
}
/*
* Empty the extent map so that we may get the right extent
* record from the disk.
*/
ocfs2_extent_map_trunc(inode_in, 0);
ocfs2_extent_map_trunc(inode_out, 0);
ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
out_unlock:
ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
return remapped > 0 ? remapped : ret;
} }
const struct inode_operations ocfs2_file_iops = { const struct inode_operations ocfs2_file_iops = {

113
fs/ocfs2/refcounttree.c
View file

@ -4468,9 +4468,9 @@ out:
} }
/* Update destination inode size, if necessary. */ /* Update destination inode size, if necessary. */
static int ocfs2_reflink_update_dest(struct inode *dest, int ocfs2_reflink_update_dest(struct inode *dest,
struct buffer_head *d_bh, struct buffer_head *d_bh,
loff_t newlen) loff_t newlen)
{ {
handle_t *handle; handle_t *handle;
int ret; int ret;
@ -4621,13 +4621,13 @@ out:
} }
/* Set up refcount tree and remap s_inode to t_inode. */ /* Set up refcount tree and remap s_inode to t_inode. */
static loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode, loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
struct buffer_head *s_bh, struct buffer_head *s_bh,
loff_t pos_in, loff_t pos_in,
struct inode *t_inode, struct inode *t_inode,
struct buffer_head *t_bh, struct buffer_head *t_bh,
loff_t pos_out, loff_t pos_out,
loff_t len) loff_t len)
{ {
struct ocfs2_cached_dealloc_ctxt dealloc; struct ocfs2_cached_dealloc_ctxt dealloc;
struct ocfs2_super *osb; struct ocfs2_super *osb;
@ -4720,10 +4720,10 @@ out:
} }
/* Lock an inode and grab a bh pointing to the inode. */ /* Lock an inode and grab a bh pointing to the inode. */
static int ocfs2_reflink_inodes_lock(struct inode *s_inode, int ocfs2_reflink_inodes_lock(struct inode *s_inode,
struct buffer_head **bh1, struct buffer_head **bh1,
struct inode *t_inode, struct inode *t_inode,
struct buffer_head **bh2) struct buffer_head **bh2)
{ {
struct inode *inode1; struct inode *inode1;
struct inode *inode2; struct inode *inode2;
@ -4808,10 +4808,10 @@ out_i1:
} }
/* Unlock both inodes and release buffers. */ /* Unlock both inodes and release buffers. */
static void ocfs2_reflink_inodes_unlock(struct inode *s_inode, void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
struct buffer_head *s_bh, struct buffer_head *s_bh,
struct inode *t_inode, struct inode *t_inode,
struct buffer_head *t_bh) struct buffer_head *t_bh)
{ {
ocfs2_inode_unlock(s_inode, 1); ocfs2_inode_unlock(s_inode, 1);
ocfs2_rw_unlock(s_inode, 1); ocfs2_rw_unlock(s_inode, 1);
@ -4823,80 +4823,3 @@ static void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
} }
unlock_two_nondirectories(s_inode, t_inode); unlock_two_nondirectories(s_inode, t_inode);
} }
/* Link a range of blocks from one file to another. */
loff_t ocfs2_reflink_remap_range(struct file *file_in,
loff_t pos_in,
struct file *file_out,
loff_t pos_out,
loff_t len,
unsigned int remap_flags)
{
struct inode *inode_in = file_inode(file_in);
struct inode *inode_out = file_inode(file_out);
struct ocfs2_super *osb = OCFS2_SB(inode_in->i_sb);
struct buffer_head *in_bh = NULL, *out_bh = NULL;
bool same_inode = (inode_in == inode_out);
loff_t remapped = 0;
ssize_t ret;
if (!ocfs2_refcount_tree(osb))
return -EOPNOTSUPP;
if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb))
return -EROFS;
/* Lock both files against IO */
ret = ocfs2_reflink_inodes_lock(inode_in, &in_bh, inode_out, &out_bh);
if (ret)
return ret;
/* Check file eligibility and prepare for block sharing. */
ret = -EINVAL;
if ((OCFS2_I(inode_in)->ip_flags & OCFS2_INODE_SYSTEM_FILE) ||
(OCFS2_I(inode_out)->ip_flags & OCFS2_INODE_SYSTEM_FILE))
goto out_unlock;
ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
&len, remap_flags);
if (ret < 0 || len == 0)
goto out_unlock;
/* Lock out changes to the allocation maps and remap. */
down_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
down_write_nested(&OCFS2_I(inode_out)->ip_alloc_sem,
SINGLE_DEPTH_NESTING);
/* Zap any page cache for the destination file's range. */
truncate_inode_pages_range(&inode_out->i_data,
round_down(pos_out, PAGE_SIZE),
round_up(pos_out + len, PAGE_SIZE) - 1);
remapped = ocfs2_reflink_remap_blocks(inode_in, in_bh, pos_in,
inode_out, out_bh, pos_out, len);
up_write(&OCFS2_I(inode_in)->ip_alloc_sem);
if (!same_inode)
up_write(&OCFS2_I(inode_out)->ip_alloc_sem);
if (remapped < 0) {
ret = remapped;
mlog_errno(ret);
goto out_unlock;
}
/*
* Empty the extent map so that we may get the right extent
* record from the disk.
*/
ocfs2_extent_map_trunc(inode_in, 0);
ocfs2_extent_map_trunc(inode_out, 0);
ret = ocfs2_reflink_update_dest(inode_out, out_bh, pos_out + len);
if (ret) {
mlog_errno(ret);
goto out_unlock;
}
out_unlock:
ocfs2_reflink_inodes_unlock(inode_in, in_bh, inode_out, out_bh);
return remapped > 0 ? remapped : ret;
}

24
fs/ocfs2/refcounttree.h
View file

@ -115,11 +115,23 @@ int ocfs2_reflink_ioctl(struct inode *inode,
const char __user *oldname, const char __user *oldname,
const char __user *newname, const char __user *newname,
bool preserve); bool preserve);
loff_t ocfs2_reflink_remap_range(struct file *file_in, loff_t ocfs2_reflink_remap_blocks(struct inode *s_inode,
loff_t pos_in, struct buffer_head *s_bh,
struct file *file_out, loff_t pos_in,
loff_t pos_out, struct inode *t_inode,
loff_t len, struct buffer_head *t_bh,
unsigned int remap_flags); loff_t pos_out,
loff_t len);
int ocfs2_reflink_inodes_lock(struct inode *s_inode,
struct buffer_head **bh1,
struct inode *t_inode,
struct buffer_head **bh2);
void ocfs2_reflink_inodes_unlock(struct inode *s_inode,
struct buffer_head *s_bh,
struct inode *t_inode,
struct buffer_head *t_bh);
int ocfs2_reflink_update_dest(struct inode *dest,
struct buffer_head *d_bh,
loff_t newlen);
#endif /* OCFS2_REFCOUNTTREE_H */ #endif /* OCFS2_REFCOUNTTREE_H */