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authorRyan Ding <ryan.ding@oracle.com>2016-03-25 14:20:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-25 16:37:42 -0700
commitc1ad1e3ca3064b1f0ab5a5185b4732ab9ad8fa24 (patch)
tree6a990a5b3dc149e31db9e385dd53f2546a39b8ff
parent9e13f1f9de1cb143fbae6f1170f26c8544b64cff (diff)
ocfs2: add ocfs2_write_type_t type to identify the caller of write
Patchset: fix ocfs2 direct io code patch to support sparse file and data ordering semantics The idea is to use buffer io(more precisely use the interface ocfs2_write_begin_nolock & ocfs2_write_end_nolock) to do the zero work beyond block size. And clear UNWRITTEN flag until direct io data has been written to disk, which can prevent data corruption when system crashed during direct write. And we will also archive a better performance: eg. dd direct write new file with block size 4KB: before this patchset: 2.5 MB/s after this patchset: 66.4 MB/s This patch (of 8): To support direct io in ocfs2_write_begin_nolock & ocfs2_write_end_nolock. Remove unused args filp & flags. Add new arg type. The type is one of buffer/direct/mmap. Indicate 3 way to perform write. buffer/mmap type has implemented. direct type will be implemented later. 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>
-rw-r--r--fs/ocfs2/aops.c20
-rw-r--r--fs/ocfs2/aops.h11
-rw-r--r--fs/ocfs2/mmap.c4
3 files changed, 22 insertions, 13 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 043110e5212d..69d7392f56d8 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1224,6 +1224,9 @@ struct ocfs2_write_ctxt {
/* First cluster allocated in a nonsparse extend */
u32 w_first_new_cpos;
+ /* Type of caller. Must be one of buffer, mmap, direct. */
+ ocfs2_write_type_t w_type;
+
struct ocfs2_write_cluster_desc w_desc[OCFS2_MAX_CLUSTERS_PER_PAGE];
/*
@@ -1319,7 +1322,8 @@ static void ocfs2_free_write_ctxt(struct ocfs2_write_ctxt *wc)
static int ocfs2_alloc_write_ctxt(struct ocfs2_write_ctxt **wcp,
struct ocfs2_super *osb, loff_t pos,
- unsigned len, struct buffer_head *di_bh)
+ unsigned len, ocfs2_write_type_t type,
+ struct buffer_head *di_bh)
{
u32 cend;
struct ocfs2_write_ctxt *wc;
@@ -1334,6 +1338,7 @@ static int ocfs2_alloc_write_ctxt(struct ocfs2_write_ctxt **wcp,
wc->w_clen = cend - wc->w_cpos + 1;
get_bh(di_bh);
wc->w_di_bh = di_bh;
+ wc->w_type = type;
if (unlikely(PAGE_CACHE_SHIFT > osb->s_clustersize_bits))
wc->w_large_pages = 1;
@@ -2077,9 +2082,8 @@ out:
return ret;
}
-int ocfs2_write_begin_nolock(struct file *filp,
- struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
+int ocfs2_write_begin_nolock(struct address_space *mapping,
+ loff_t pos, unsigned len, ocfs2_write_type_t type,
struct page **pagep, void **fsdata,
struct buffer_head *di_bh, struct page *mmap_page)
{
@@ -2096,7 +2100,7 @@ int ocfs2_write_begin_nolock(struct file *filp,
int try_free = 1, ret1;
try_again:
- ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, di_bh);
+ ret = ocfs2_alloc_write_ctxt(&wc, osb, pos, len, type, di_bh);
if (ret) {
mlog_errno(ret);
return ret;
@@ -2153,7 +2157,7 @@ try_again:
(unsigned long long)OCFS2_I(inode)->ip_blkno,
(long long)i_size_read(inode),
le32_to_cpu(di->i_clusters),
- pos, len, flags, mmap_page,
+ pos, len, type, mmap_page,
clusters_to_alloc, extents_to_split);
/*
@@ -2323,8 +2327,8 @@ static int ocfs2_write_begin(struct file *file, struct address_space *mapping,
*/
down_write(&OCFS2_I(inode)->ip_alloc_sem);
- ret = ocfs2_write_begin_nolock(file, mapping, pos, len, flags, pagep,
- fsdata, di_bh, NULL);
+ ret = ocfs2_write_begin_nolock(mapping, pos, len, OCFS2_WRITE_BUFFER,
+ pagep, fsdata, di_bh, NULL);
if (ret) {
mlog_errno(ret);
goto out_fail;
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 24e496d6bdcd..d06b80f58f83 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -47,9 +47,14 @@ int ocfs2_write_end_nolock(struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata);
-int ocfs2_write_begin_nolock(struct file *filp,
- struct address_space *mapping,
- loff_t pos, unsigned len, unsigned flags,
+typedef enum {
+ OCFS2_WRITE_BUFFER = 0,
+ OCFS2_WRITE_DIRECT,
+ OCFS2_WRITE_MMAP,
+} ocfs2_write_type_t;
+
+int ocfs2_write_begin_nolock(struct address_space *mapping,
+ loff_t pos, unsigned len, ocfs2_write_type_t type,
struct page **pagep, void **fsdata,
struct buffer_head *di_bh, struct page *mmap_page);
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 77ebc2bc1cca..9ea081f4e6e4 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -104,8 +104,8 @@ static int __ocfs2_page_mkwrite(struct file *file, struct buffer_head *di_bh,
if (page->index == last_index)
len = ((size - 1) & ~PAGE_CACHE_MASK) + 1;
- ret = ocfs2_write_begin_nolock(file, mapping, pos, len, 0, &locked_page,
- &fsdata, di_bh, page);
+ ret = ocfs2_write_begin_nolock(mapping, pos, len, OCFS2_WRITE_MMAP,
+ &locked_page, &fsdata, di_bh, page);
if (ret) {
if (ret != -ENOSPC)
mlog_errno(ret);

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