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| author | Ryan Ding <ryan.ding@oracle.com> | 2016-03-25 22:21:03 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-03-26 00:37:42 +0100 |
| commit | 2de6a3c73180ef4071b45185756be51a6c767924 (patch) | |
| tree | 294db5dbeeb4984016becae93432ea57e0fefc56 /fs/ocfs2/aops.c | |
| parent | ocfs2: do not change i_size in write_end for direct io (diff) | |
| download | linux-2de6a3c73180ef4071b45185756be51a6c767924.tar.xz linux-2de6a3c73180ef4071b45185756be51a6c767924.zip | |
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>
Diffstat (limited to 'fs/ocfs2/aops.c')
| -rw-r--r-- | fs/ocfs2/aops.c | 28 |
1 files changed, 13 insertions, 15 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c index 4ad77453438a..7b268c357cf3 100644 --- a/fs/ocfs2/aops.c +++ b/fs/ocfs2/aops.c @@ -1596,7 +1596,7 @@ out: * 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, |