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authorDavid S. Miller <davem@davemloft.net>2012-09-15 11:43:53 -0400
committerDavid S. Miller <davem@davemloft.net>2012-09-15 11:43:53 -0400
commitb48b63a1f6e26b0dec2c9f1690396ed4bcb66903 (patch)
tree8d9ad227c3a7d35cd78d40ecaf9bf59375dbd21a /fs/gfs2/file.c
parent7f2e6a5d8608d0353b017a0fe15502307593734e (diff)
parent3f0c3c8fe30c725c1264fb6db8cc4b69db3a658a (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts: net/netfilter/nfnetlink_log.c net/netfilter/xt_LOG.c Rather easy conflict resolution, the 'net' tree had bug fixes to make sure we checked if a socket is a time-wait one or not and elide the logging code if so. Whereas on the 'net-next' side we are calculating the UID and GID from the creds using different interfaces due to the user namespace changes from Eric Biederman. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'fs/gfs2/file.c')
-rw-r--r--fs/gfs2/file.c31
1 files changed, 27 insertions, 4 deletions
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index d1d791ef38de..382000ffac1f 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -323,6 +323,29 @@ static long gfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
}
/**
+ * gfs2_size_hint - Give a hint to the size of a write request
+ * @file: The struct file
+ * @offset: The file offset of the write
+ * @size: The length of the write
+ *
+ * When we are about to do a write, this function records the total
+ * write size in order to provide a suitable hint to the lower layers
+ * about how many blocks will be required.
+ *
+ */
+
+static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
+{
+ struct inode *inode = filep->f_dentry->d_inode;
+ struct gfs2_sbd *sdp = GFS2_SB(inode);
+ struct gfs2_inode *ip = GFS2_I(inode);
+ size_t blks = (size + sdp->sd_sb.sb_bsize - 1) >> sdp->sd_sb.sb_bsize_shift;
+ int hint = min_t(size_t, INT_MAX, blks);
+
+ atomic_set(&ip->i_res->rs_sizehint, hint);
+}
+
+/**
* gfs2_allocate_page_backing - Use bmap to allocate blocks
* @page: The (locked) page to allocate backing for
*
@@ -382,8 +405,7 @@ static int gfs2_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
if (ret)
return ret;
- atomic_set(&ip->i_res->rs_sizehint,
- PAGE_CACHE_SIZE >> sdp->sd_sb.sb_bsize_shift);
+ gfs2_size_hint(vma->vm_file, pos, PAGE_CACHE_SIZE);
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
ret = gfs2_glock_nq(&gh);
@@ -663,7 +685,8 @@ static ssize_t gfs2_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
if (ret)
return ret;
- atomic_set(&ip->i_res->rs_sizehint, writesize >> sdp->sd_sb.sb_bsize_shift);
+ gfs2_size_hint(file, pos, writesize);
+
if (file->f_flags & O_APPEND) {
struct gfs2_holder gh;
@@ -789,7 +812,7 @@ static long gfs2_fallocate(struct file *file, int mode, loff_t offset,
if (unlikely(error))
goto out_uninit;
- atomic_set(&ip->i_res->rs_sizehint, len >> sdp->sd_sb.sb_bsize_shift);
+ gfs2_size_hint(file, offset, len);
while (len > 0) {
if (len < bytes)