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ocfs2: return the physical address in ocfs2_write_cluster 

To support direct io in ocfs2_write_begin_nolock & ocfs2_write_end_nolock.

Direct io needs to get the physical address from write_begin, to map the
user page.  This patch is to change the arg 'phys' of
ocfs2_write_cluster to a pointer, so it can be retrieved to write_begin.
And we can retrieve it to the direct io procedure.

Signed-off-by: Ryan Ding <ryan.ding@oracle.com>
Reviewed-by: Junxiao Bi <junxiao.bi@oracle.com>
Cc: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ryan Ding 2016-03-25 14:21:03 -07:00 committed by Linus Torvalds
parent 46e6255659
commit 2de6a3c731
1 changed files with 13 additions and 15 deletions
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28
fs/ocfs2/aops.c
View File

@ -1596,7 +1596,7 @@ static int ocfs2_grab_pages_for_write(struct address_space *mapping,
* Prepare a single cluster for write one cluster into the file.
*/
static int ocfs2_write_cluster(struct address_space *mapping,
u32 phys, unsigned int new,
u32 *phys, unsigned int new,
unsigned int clear_unwritten,
unsigned int should_zero,
struct ocfs2_alloc_context *data_ac,
@ -1605,9 +1605,10 @@ static int ocfs2_write_cluster(struct address_space *mapping,
loff_t user_pos, unsigned user_len)
{
int ret, i;
u64 v_blkno, p_blkno;
u64 p_blkno;
struct inode *inode = mapping->host;
struct ocfs2_extent_tree et;
int bpc = ocfs2_clusters_to_blocks(inode->i_sb, 1);
if (new) {
u32 tmp_pos;
@ -1641,7 +1642,7 @@ static int ocfs2_write_cluster(struct address_space *mapping,
ocfs2_init_dinode_extent_tree(&et, INODE_CACHE(inode),
wc->w_di_bh);
ret = ocfs2_mark_extent_written(inode, &et,
wc->w_handle, cpos, 1, phys,
wc->w_handle, cpos, 1, *phys,
meta_ac, &wc->w_dealloc);
if (ret < 0) {
mlog_errno(ret);
@ -1649,26 +1650,23 @@ static int ocfs2_write_cluster(struct address_space *mapping,
}
}
if (should_zero)
v_blkno = ocfs2_clusters_to_blocks(inode->i_sb, cpos);
else
v_blkno = user_pos >> inode->i_sb->s_blocksize_bits;
/*
* The only reason this should fail is due to an inability to
* find the extent added.
*/
ret = ocfs2_extent_map_get_blocks(inode, v_blkno, &p_blkno, NULL,
NULL);
ret = ocfs2_get_clusters(inode, cpos, phys, NULL, NULL);
if (ret < 0) {
mlog(ML_ERROR, "Get physical blkno failed for inode %llu, "
"at logical block %llu",
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(unsigned long long)v_blkno);
"at logical cluster %u",
(unsigned long long)OCFS2_I(inode)->ip_blkno, cpos);
goto out;
}
BUG_ON(p_blkno == 0);
BUG_ON(*phys == 0);
p_blkno = ocfs2_clusters_to_blocks(inode->i_sb, *phys);
if (!should_zero)
p_blkno += (user_pos >> inode->i_sb->s_blocksize_bits) & (u64)(bpc - 1);
for(i = 0; i < wc->w_num_pages; i++) {
int tmpret;
@ -1725,7 +1723,7 @@ static int ocfs2_write_cluster_by_desc(struct address_space *mapping,
if ((cluster_off + local_len) > osb->s_clustersize)
local_len = osb->s_clustersize - cluster_off;
ret = ocfs2_write_cluster(mapping, desc->c_phys,
ret = ocfs2_write_cluster(mapping, &desc->c_phys,
desc->c_new,
desc->c_clear_unwritten,
desc->c_needs_zero,