1 files changed, 34 insertions, 18 deletions

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index e77c28cf369..8d79b8912e3 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -154,11 +154,13 @@ int ceph_open(struct inode *inode, struct file *file)
 	}
 
 	/*
-	 * No need to block if we have any caps.  Update wanted set
+	 * No need to block if we have caps on the auth MDS (for
+	 * write) or any MDS (for read).  Update wanted set
 	 * asynchronously.
 	 */
 	spin_lock(&inode->i_lock);
-	if (__ceph_is_any_real_caps(ci)) {
+	if (__ceph_is_any_real_caps(ci) &&
+	    (((fmode & CEPH_FILE_MODE_WR) == 0) || ci->i_auth_cap)) {
 		int mds_wanted = __ceph_caps_mds_wanted(ci);
 		int issued = __ceph_caps_issued(ci, NULL);
 
@@ -280,11 +282,12 @@ 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)
+			int *checkeof, bool align_to_pages)
 {
 	struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	u64 pos, this_len;
+	int io_align, page_align;
 	int page_off = off & ~PAGE_CACHE_MASK; /* first byte's offset in page */
 	int left, pages_left;
 	int read;
@@ -300,14 +303,19 @@ static int striped_read(struct inode *inode,
 	page_pos = pages;
 	pages_left = num_pages;
 	read = 0;
+	io_align = off & ~PAGE_MASK;
 
 more:
+	if (align_to_pages)
+		page_align = (pos - io_align) & ~PAGE_MASK;
+	else
+		page_align = pos & ~PAGE_MASK;
 	this_len = left;
 	ret = ceph_osdc_readpages(&fsc->client->osdc, ceph_vino(inode),
 				  &ci->i_layout, pos, &this_len,
 				  ci->i_truncate_seq,
 				  ci->i_truncate_size,
-				  page_pos, pages_left);
+				  page_pos, pages_left, page_align);
 	hit_stripe = this_len < left;
 	was_short = ret >= 0 && ret < this_len;
 	if (ret == -ENOENT)
@@ -374,26 +382,25 @@ static ssize_t ceph_sync_read(struct file *file, char __user *data,
 	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, off, len);
-
-		/*
-		 * flush any page cache pages in this range.  this
-		 * will make concurrent normal and O_DIRECT io slow,
-		 * but it will at least behave sensibly when they are
-		 * in sequence.
-		 */
-	} else {
+	if (file->f_flags & O_DIRECT)
+		pages = ceph_get_direct_page_vector(data, num_pages);
+	else
 		pages = ceph_alloc_page_vector(num_pages, GFP_NOFS);
-	}
 	if (IS_ERR(pages))
 		return PTR_ERR(pages);
 
+	/*
+	 * flush any page cache pages in this range.  this
+	 * will make concurrent normal and sync io slow,
+	 * but it will at least behave sensibly when they are
+	 * in sequence.
+	 */
 	ret = filemap_write_and_wait(inode->i_mapping);
 	if (ret < 0)
 		goto done;
 
-	ret = striped_read(inode, off, len, pages, num_pages, checkeof);
+	ret = striped_read(inode, off, len, pages, num_pages, checkeof,
+			   file->f_flags & O_DIRECT);
 
 	if (ret >= 0 && (file->f_flags & O_DIRECT) == 0)
 		ret = ceph_copy_page_vector_to_user(pages, data, off, ret);
@@ -448,6 +455,7 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
 	int flags;
 	int do_sync = 0;
 	int check_caps = 0;
+	int page_align, io_align;
 	int ret;
 	struct timespec mtime = CURRENT_TIME;
 
@@ -462,6 +470,8 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
 	else
 		pos = *offset;
 
+	io_align = pos & ~PAGE_MASK;
+
 	ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + left);
 	if (ret < 0)
 		return ret;
@@ -486,20 +496,26 @@ static ssize_t ceph_sync_write(struct file *file, const char __user *data,
 	 */
 more:
 	len = left;
+	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 & ~PAGE_MASK;
 	req = ceph_osdc_new_request(&fsc->client->osdc, &ci->i_layout,
 				    ceph_vino(inode), pos, &len,
 				    CEPH_OSD_OP_WRITE, flags,
 				    ci->i_snap_realm->cached_context,
 				    do_sync,
 				    ci->i_truncate_seq, ci->i_truncate_size,
-				    &mtime, false, 2);
+				    &mtime, false, 2, page_align);
 	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, pos, len);
+		pages = ceph_get_direct_page_vector(data, num_pages);
 		if (IS_ERR(pages)) {
 			ret = PTR_ERR(pages);
 			goto out;