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-rw-r--r--fs/ceph/file.c39
1 files changed, 23 insertions, 16 deletions
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 8d79b89..7d0e4a8 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -282,7 +282,8 @@ int ceph_release(struct inode *inode, struct file *file)
static int striped_read(struct inode *inode,
u64 off, u64 len,
struct page **pages, int num_pages,
- int *checkeof, bool align_to_pages)
+ int *checkeof, bool align_to_pages,
+ unsigned long buf_align)
{
struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
struct ceph_inode_info *ci = ceph_inode(inode);
@@ -307,7 +308,7 @@ static int striped_read(struct inode *inode,
more:
if (align_to_pages)
- page_align = (pos - io_align) & ~PAGE_MASK;
+ page_align = (pos - io_align + buf_align) & ~PAGE_MASK;
else
page_align = pos & ~PAGE_MASK;
this_len = left;
@@ -376,16 +377,18 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
struct inode *inode = file->f_dentry->d_inode;
struct page **pages;
u64 off = *poff;
- int num_pages = calc_pages_for(off, len);
- int ret;
+ int num_pages, ret;
dout("sync_read on file %p %llu~%u %s\n", file, off, len,
(file->f_flags & O_DIRECT) ? "O_DIRECT" : "");
- if (file->f_flags & O_DIRECT)
- pages = ceph_get_direct_page_vector(data, num_pages);
- else
+ if (file->f_flags & O_DIRECT) {
+ num_pages = calc_pages_for((unsigned long)data, len);
+ pages = ceph_get_direct_page_vector(data, num_pages, true);
+ } else {
+ num_pages = calc_pages_for(off, len);
pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
+ }
if (IS_ERR(pages))
return PTR_ERR(pages);
@@ -400,7 +403,8 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
goto done;
ret = striped_read(inode, off, len, pages, num_pages, checkeof,
- file->f_flags & O_DIRECT);
+ file->f_flags & O_DIRECT,
+ (unsigned long)data & ~PAGE_MASK);
if (ret >= 0 && (file->f_flags & O_DIRECT) == 0)
ret = ceph_copy_page_vector_to_user(pages, data, off, ret);
@@ -409,7 +413,7 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
done:
if (file->f_flags & O_DIRECT)
- ceph_put_page_vector(pages, num_pages);
+ ceph_put_page_vector(pages, num_pages, true);
else
ceph_release_page_vector(pages, num_pages);
dout("sync_read result %d\n", ret);
@@ -456,6 +460,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
int do_sync = 0;
int check_caps = 0;
int page_align, io_align;
+ unsigned long buf_align;
int ret;
struct timespec mtime = CURRENT_TIME;
@@ -471,6 +476,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
pos = *offset;
io_align = pos & ~PAGE_MASK;
+ buf_align = (unsigned long)data & ~PAGE_MASK;
ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left);
if (ret < 0)
@@ -496,12 +502,15 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
*/
more:
len = left;
- if (file->f_flags & O_DIRECT)
+ if (file->f_flags & O_DIRECT) {
/* write from beginning of first page, regardless of
io alignment */
- page_align = (pos - io_align) & ~PAGE_MASK;
- else
+ page_align = (pos - io_align + buf_align) & ~PAGE_MASK;
+ num_pages = calc_pages_for((unsigned long)data, len);
+ } else {
page_align = pos & ~PAGE_MASK;
+ num_pages = calc_pages_for(pos, len);
+ }
req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
ceph_vino(inode), pos, &len,
CEPH_OSD_OP_WRITE, flags,
@@ -512,10 +521,8 @@ more:
if (!req)
return -ENOMEM;
- num_pages = calc_pages_for(pos, len);
-
if (file->f_flags & O_DIRECT) {
- pages = ceph_get_direct_page_vector(data, num_pages);
+ pages = ceph_get_direct_page_vector(data, num_pages, false);
if (IS_ERR(pages)) {
ret = PTR_ERR(pages);
goto out;
@@ -565,7 +572,7 @@ more:
}
if (file->f_flags & O_DIRECT)
- ceph_put_page_vector(pages, num_pages);
+ ceph_put_page_vector(pages, num_pages, false);
else if (file->f_flags & O_SYNC)
ceph_release_page_vector(pages, num_pages);