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authorYehuda Sadeh <yehuda@hq.newdream.net>2010-02-09 11:14:41 -0800
committerSage Weil <sage@newdream.net>2010-02-11 11:48:51 -0800
commit29065a513aa4c7e4b46b77cbcd25f814a4ca0bfe (patch)
tree74607baf067fe47a5eeeeb07257186fdd15de989 /fs/ceph/file.c
parent3d497d858ae6e5f23a28783030aecc69074e102d (diff)
ceph: sync read/write considers page cache
In the cases where we either do a sync read or a write, we need to make sure that everything in the page cache is flushed. In the case of a sync write we invalidate the relevant pages, so that subsequent read/write reflects the new data written. Signed-off-by: Yehuda Sadeh <yehuda@hq.newdream.net> Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph/file.c')
-rw-r--r--fs/ceph/file.c18
1 files changed, 16 insertions, 2 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 43bd2f2e51a..bbf1ccf2d56 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -409,7 +409,7 @@ static void zero_page_vector_range(int off, int len, struct page **pages)
i++;
}
while (len >= PAGE_CACHE_SIZE) {
- dout("zeroing %d %p\n", i, pages[i]);
+ dout("zeroing %d %p len=%d\n", i, pages[i], len);
zero_user_segment(pages[i], 0, PAGE_CACHE_SIZE);
len -= PAGE_CACHE_SIZE;
i++;
@@ -542,13 +542,16 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
* but it will at least behave sensibly when they are
* in sequence.
*/
- filemap_write_and_wait(inode->i_mapping);
} else {
pages = alloc_page_vector(num_pages);
}
if (IS_ERR(pages))
return PTR_ERR(pages);
+ ret = filemap_write_and_wait(inode->i_mapping);
+ if (ret < 0)
+ goto done;
+
ret = striped_read(inode, off, len, pages, num_pages);
if (ret >= 0 && (file->f_flags & O_DIRECT) == 0)
@@ -556,6 +559,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
if (ret >= 0)
*poff = off + ret;
+done:
if (file->f_flags & O_DIRECT)
put_page_vector(pages, num_pages);
else
@@ -617,6 +621,16 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
else
pos = *offset;
+ ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left);
+ if (ret < 0)
+ return ret;
+
+ ret = invalidate_inode_pages2_range(inode->i_mapping,
+ pos >> PAGE_CACHE_SHIFT,
+ (pos + left) >> PAGE_CACHE_SHIFT);
+ if (ret < 0)
+ dout("invalidate_inode_pages2_range returned %d\n", ret);
+
flags = CEPH_OSD_FLAG_ORDERSNAP |
CEPH_OSD_FLAG_ONDISK |
CEPH_OSD_FLAG_WRITE;