Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs...

[pandora-kernel.git] / fs / ceph / file.c

diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 203252d..9542f07 100644 (file)
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -191,7 +191,8 @@ int ceph_open(struct inode *inode, struct file *file)
                err = PTR_ERR(req);
                goto out;
        }
-       req->r_inode = igrab(inode);
+       req->r_inode = inode;
+       ihold(inode);
        req->r_num_caps = 1;
        err = ceph_mdsc_do_request(mdsc, parent_inode, req);
        if (!err)
@@ -282,7 +283,7 @@ 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 o_direct,
                        unsigned long buf_align)
 {
        struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
@@ -307,7 +308,7 @@ static int striped_read(struct inode *inode,
        io_align = off & ~PAGE_MASK;
 
 more:
-       if (align_to_pages)
+       if (o_direct)
                page_align = (pos - io_align + buf_align) & ~PAGE_MASK;
        else
                page_align = pos & ~PAGE_MASK;
@@ -317,10 +318,10 @@ more:
                                  ci->i_truncate_seq,
                                  ci->i_truncate_size,
                                  page_pos, pages_left, page_align);
-       hit_stripe = this_len < left;
-       was_short = ret >= 0 && ret < this_len;
        if (ret == -ENOENT)
                ret = 0;
+       hit_stripe = this_len < left;
+       was_short = ret >= 0 && ret < this_len;
        dout("striped_read %llu~%u (read %u) got %d%s%s\n", pos, left, read,
             ret, hit_stripe ? " HITSTRIPE" : "", was_short ? " SHORT" : "");
 
@@ -345,20 +346,22 @@ more:
        }
 
        if (was_short) {
-               /* was original extent fully inside i_size? */
-               if (pos + left <= inode->i_size) {
-                       dout("zero tail\n");
-                       ceph_zero_page_vector_range(page_off + read, len - read,
+               /* did we bounce off eof? */
+               if (pos + left > inode->i_size)
+                       *checkeof = 1;
+
+               /* zero trailing bytes (inside i_size) */
+               if (left > 0 && pos < inode->i_size) {
+                       if (pos + left > inode->i_size)
+                               left = inode->i_size - pos;
+
+                       dout("zero tail %d\n", left);
+                       ceph_zero_page_vector_range(page_off + read, left,
                                                    pages);
-                       read = len;
-                       goto out;
+                       read += left;
                }
-
-               /* check i_size */
-               *checkeof = 1;
        }
 
-out:
        if (ret >= 0)
                ret = read;
        dout("striped_read returns %d\n", ret);
@@ -658,7 +661,7 @@ out:
 
                /* hit EOF or hole? */
                if (statret == 0 && *ppos < inode->i_size) {
-                       dout("aio_read sync_read hit hole, reading more\n");
+                       dout("aio_read sync_read hit hole, ppos %lld < size %lld, reading more\n", *ppos, inode->i_size);
                        read += ret;
                        base += ret;
                        len -= ret;