GFS2: Copy gfs2_trans_add_bh into new data/meta functions
This patch copies the body of gfs2_trans_add_bh into the two newly
added gfs2_trans_add_data and gfs2_trans_add_meta functions. We can
then move the .lo_add functions from lops.c into trans.c and call
them directly.
As a result of this, we no longer need to use the .lo_add functions
at all, so that is removed from the log operations structure.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index cb795ac..1fbd57e 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -18,6 +18,7 @@
#include "gfs2.h"
#include "incore.h"
#include "glock.h"
+#include "inode.h"
#include "log.h"
#include "lops.h"
#include "meta_io.h"
@@ -143,15 +144,46 @@
}
/**
- * gfs2_trans_add_bh - Add a to-be-modified buffer to the current transaction
- * @gl: the glock the buffer belongs to
- * @bh: The buffer to add
- * @meta: True in the case of adding metadata
+ * databuf_lo_add - Add a databuf to the transaction.
*
+ * This is used in two distinct cases:
+ * i) In ordered write mode
+ * We put the data buffer on a list so that we can ensure that its
+ * synced to disk at the right time
+ * ii) In journaled data mode
+ * We need to journal the data block in the same way as metadata in
+ * the functions above. The difference is that here we have a tag
+ * which is two __be64's being the block number (as per meta data)
+ * and a flag which says whether the data block needs escaping or
+ * not. This means we need a new log entry for each 251 or so data
+ * blocks, which isn't an enormous overhead but twice as much as
+ * for normal metadata blocks.
*/
-
-static void gfs2_trans_add_bh(struct gfs2_glock *gl, struct buffer_head *bh, int meta)
+static void databuf_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
{
+ struct gfs2_trans *tr = current->journal_info;
+ struct address_space *mapping = bd->bd_bh->b_page->mapping;
+ struct gfs2_inode *ip = GFS2_I(mapping->host);
+
+ if (tr)
+ tr->tr_touched = 1;
+ if (!list_empty(&bd->bd_list))
+ return;
+ set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
+ set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
+ if (gfs2_is_jdata(ip)) {
+ gfs2_pin(sdp, bd->bd_bh);
+ tr->tr_num_databuf_new++;
+ sdp->sd_log_num_databuf++;
+ list_add_tail(&bd->bd_list, &sdp->sd_log_le_databuf);
+ } else {
+ list_add_tail(&bd->bd_list, &sdp->sd_log_le_ordered);
+ }
+}
+
+void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
+{
+
struct gfs2_sbd *sdp = gl->gl_sbd;
struct gfs2_bufdata *bd;
@@ -163,24 +195,64 @@
else {
gfs2_log_unlock(sdp);
unlock_buffer(bh);
- gfs2_attach_bufdata(gl, bh, meta);
+ gfs2_attach_bufdata(gl, bh, 0);
bd = bh->b_private;
lock_buffer(bh);
gfs2_log_lock(sdp);
}
- lops_add(sdp, bd);
+ databuf_lo_add(sdp, bd);
gfs2_log_unlock(sdp);
unlock_buffer(bh);
}
-void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh)
+static void meta_lo_add(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
{
- return gfs2_trans_add_bh(gl, bh, 0);
+ struct gfs2_meta_header *mh;
+ struct gfs2_trans *tr;
+
+ tr = current->journal_info;
+ tr->tr_touched = 1;
+ if (!list_empty(&bd->bd_list))
+ return;
+ set_bit(GLF_LFLUSH, &bd->bd_gl->gl_flags);
+ set_bit(GLF_DIRTY, &bd->bd_gl->gl_flags);
+ mh = (struct gfs2_meta_header *)bd->bd_bh->b_data;
+ if (unlikely(mh->mh_magic != cpu_to_be32(GFS2_MAGIC))) {
+ printk(KERN_ERR
+ "Attempting to add uninitialised block to journal (inplace block=%lld)\n",
+ (unsigned long long)bd->bd_bh->b_blocknr);
+ BUG();
+ }
+ gfs2_pin(sdp, bd->bd_bh);
+ mh->__pad0 = cpu_to_be64(0);
+ mh->mh_jid = cpu_to_be32(sdp->sd_jdesc->jd_jid);
+ sdp->sd_log_num_buf++;
+ list_add(&bd->bd_list, &sdp->sd_log_le_buf);
+ tr->tr_num_buf_new++;
}
void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh)
{
- return gfs2_trans_add_bh(gl, bh, 1);
+
+ struct gfs2_sbd *sdp = gl->gl_sbd;
+ struct gfs2_bufdata *bd;
+
+ lock_buffer(bh);
+ gfs2_log_lock(sdp);
+ bd = bh->b_private;
+ if (bd)
+ gfs2_assert(sdp, bd->bd_gl == gl);
+ else {
+ gfs2_log_unlock(sdp);
+ unlock_buffer(bh);
+ gfs2_attach_bufdata(gl, bh, 1);
+ bd = bh->b_private;
+ lock_buffer(bh);
+ gfs2_log_lock(sdp);
+ }
+ meta_lo_add(sdp, bd);
+ gfs2_log_unlock(sdp);
+ unlock_buffer(bh);
}
void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
