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Diffstat (limited to 'fs/gfs2/lops.c')
-rw-r--r--fs/gfs2/lops.c103
1 files changed, 98 insertions, 5 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 0301be655b12..6b1efb594d90 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -12,6 +12,7 @@
#include <linux/spinlock.h>
#include <linux/completion.h>
#include <linux/buffer_head.h>
+#include <linux/mempool.h>
#include <linux/gfs2_ondisk.h>
#include <linux/bio.h>
#include <linux/fs.h>
@@ -76,7 +77,7 @@ static void maybe_release_space(struct gfs2_bufdata *bd)
if (bi->bi_clone == 0)
return;
if (sdp->sd_args.ar_discard)
- gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi);
+ gfs2_rgrp_send_discards(sdp, rgd->rd_data0, bd->bd_bh, bi, 1, NULL);
memcpy(bi->bi_clone + bi->bi_offset,
bd->bd_bh->b_data + bi->bi_offset, bi->bi_len);
clear_bit(GBF_FULL, &bi->bi_flags);
@@ -143,6 +144,98 @@ static inline __be64 *bh_ptr_end(struct buffer_head *bh)
return (__force __be64 *)(bh->b_data + bh->b_size);
}
+/**
+ * gfs2_log_write_endio - End of I/O for a log buffer
+ * @bh: The buffer head
+ * @uptodate: I/O Status
+ *
+ */
+
+static void gfs2_log_write_endio(struct buffer_head *bh, int uptodate)
+{
+ struct gfs2_sbd *sdp = bh->b_private;
+ bh->b_private = NULL;
+
+ end_buffer_write_sync(bh, uptodate);
+ if (atomic_dec_and_test(&sdp->sd_log_in_flight))
+ wake_up(&sdp->sd_log_flush_wait);
+}
+
+/**
+ * gfs2_log_get_buf - Get and initialize a buffer to use for log control data
+ * @sdp: The GFS2 superblock
+ *
+ * tReturns: the buffer_head
+ */
+
+static struct buffer_head *gfs2_log_get_buf(struct gfs2_sbd *sdp)
+{
+ u64 blkno = gfs2_log_bmap(sdp, sdp->sd_log_flush_head);
+ struct buffer_head *bh;
+
+ bh = sb_getblk(sdp->sd_vfs, blkno);
+ lock_buffer(bh);
+ memset(bh->b_data, 0, bh->b_size);
+ set_buffer_uptodate(bh);
+ clear_buffer_dirty(bh);
+ gfs2_log_incr_head(sdp);
+ atomic_inc(&sdp->sd_log_in_flight);
+ bh->b_private = sdp;
+ bh->b_end_io = gfs2_log_write_endio;
+
+ return bh;
+}
+
+/**
+ * gfs2_fake_write_endio -
+ * @bh: The buffer head
+ * @uptodate: The I/O Status
+ *
+ */
+
+static void gfs2_fake_write_endio(struct buffer_head *bh, int uptodate)
+{
+ struct buffer_head *real_bh = bh->b_private;
+ struct gfs2_bufdata *bd = real_bh->b_private;
+ struct gfs2_sbd *sdp = bd->bd_gl->gl_sbd;
+
+ end_buffer_write_sync(bh, uptodate);
+ mempool_free(bh, gfs2_bh_pool);
+ unlock_buffer(real_bh);
+ brelse(real_bh);
+ if (atomic_dec_and_test(&sdp->sd_log_in_flight))
+ wake_up(&sdp->sd_log_flush_wait);
+}
+
+/**
+ * gfs2_log_fake_buf - Build a fake buffer head to write metadata buffer to log
+ * @sdp: the filesystem
+ * @data: the data the buffer_head should point to
+ *
+ * Returns: the log buffer descriptor
+ */
+
+static struct buffer_head *gfs2_log_fake_buf(struct gfs2_sbd *sdp,
+ struct buffer_head *real)
+{
+ u64 blkno = gfs2_log_bmap(sdp, sdp->sd_log_flush_head);
+ struct buffer_head *bh;
+
+ bh = mempool_alloc(gfs2_bh_pool, GFP_NOFS);
+ atomic_set(&bh->b_count, 1);
+ bh->b_state = (1 << BH_Mapped) | (1 << BH_Uptodate) | (1 << BH_Lock);
+ set_bh_page(bh, real->b_page, bh_offset(real));
+ bh->b_blocknr = blkno;
+ bh->b_size = sdp->sd_sb.sb_bsize;
+ bh->b_bdev = sdp->sd_vfs->s_bdev;
+ bh->b_private = real;
+ bh->b_end_io = gfs2_fake_write_endio;
+
+ gfs2_log_incr_head(sdp);
+ atomic_inc(&sdp->sd_log_in_flight);
+
+ return bh;
+}
static struct buffer_head *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type)
{
@@ -553,11 +646,11 @@ static void gfs2_check_magic(struct buffer_head *bh)
__be32 *ptr;
clear_buffer_escaped(bh);
- kaddr = kmap_atomic(bh->b_page, KM_USER0);
+ kaddr = kmap_atomic(bh->b_page);
ptr = kaddr + bh_offset(bh);
if (*ptr == cpu_to_be32(GFS2_MAGIC))
set_buffer_escaped(bh);
- kunmap_atomic(kaddr, KM_USER0);
+ kunmap_atomic(kaddr);
}
static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh,
@@ -594,10 +687,10 @@ static void gfs2_write_blocks(struct gfs2_sbd *sdp, struct buffer_head *bh,
if (buffer_escaped(bd->bd_bh)) {
void *kaddr;
bh1 = gfs2_log_get_buf(sdp);
- kaddr = kmap_atomic(bd->bd_bh->b_page, KM_USER0);
+ kaddr = kmap_atomic(bd->bd_bh->b_page);
memcpy(bh1->b_data, kaddr + bh_offset(bd->bd_bh),
bh1->b_size);
- kunmap_atomic(kaddr, KM_USER0);
+ kunmap_atomic(kaddr);
*(__be32 *)bh1->b_data = 0;
clear_buffer_escaped(bd->bd_bh);
unlock_buffer(bd->bd_bh);