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-rw-r--r--fs/gfs2/lops.c2
-rw-r--r--fs/gfs2/lops.h1
-rw-r--r--fs/gfs2/recovery.c104
3 files changed, 106 insertions, 1 deletions
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index ed1da4323967..ed69298dd824 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -823,7 +823,7 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
*
*/
-static void gfs2_meta_sync(struct gfs2_glock *gl)
+void gfs2_meta_sync(struct gfs2_glock *gl)
{
struct address_space *mapping = gfs2_glock2aspace(gl);
struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
diff --git a/fs/gfs2/lops.h b/fs/gfs2/lops.h
index 9c5e4e491e03..4a3d8aecdf82 100644
--- a/fs/gfs2/lops.h
+++ b/fs/gfs2/lops.h
@@ -27,6 +27,7 @@ extern void gfs2_log_submit_bio(struct bio **biop, int opf);
extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
struct gfs2_log_header_host *head, bool keep_cache);
+extern void gfs2_meta_sync(struct gfs2_glock *gl);
static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
{
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index a8bb17e355b8..b5cbe21efdfb 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -296,6 +296,109 @@ static void gfs2_recovery_done(struct gfs2_sbd *sdp, unsigned int jid,
sdp->sd_lockstruct.ls_ops->lm_recovery_result(sdp, jid, message);
}
+/**
+ * update_statfs_inode - Update the master statfs inode or zero out the local
+ * statfs inode for a given journal.
+ * @jd: The journal
+ * @head: If NULL, @inode is the local statfs inode and we need to zero it out.
+ * Otherwise, it @head contains the statfs change info that needs to be
+ * synced to the master statfs inode (pointed to by @inode).
+ * @inode: statfs inode to update.
+ */
+static int update_statfs_inode(struct gfs2_jdesc *jd,
+ struct gfs2_log_header_host *head,
+ struct inode *inode)
+{
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+ struct gfs2_inode *ip;
+ struct buffer_head *bh;
+ struct gfs2_statfs_change_host sc;
+ int error = 0;
+
+ BUG_ON(!inode);
+ ip = GFS2_I(inode);
+
+ error = gfs2_meta_inode_buffer(ip, &bh);
+ if (error)
+ goto out;
+
+ spin_lock(&sdp->sd_statfs_spin);
+
+ if (head) { /* Update the master statfs inode */
+ gfs2_statfs_change_in(&sc, bh->b_data + sizeof(struct gfs2_dinode));
+ sc.sc_total += head->lh_local_total;
+ sc.sc_free += head->lh_local_free;
+ sc.sc_dinodes += head->lh_local_dinodes;
+ gfs2_statfs_change_out(&sc, bh->b_data + sizeof(struct gfs2_dinode));
+
+ fs_info(sdp, "jid=%u: Updated master statfs Total:%lld, "
+ "Free:%lld, Dinodes:%lld after change "
+ "[%+lld,%+lld,%+lld]\n", jd->jd_jid, sc.sc_total,
+ sc.sc_free, sc.sc_dinodes, head->lh_local_total,
+ head->lh_local_free, head->lh_local_dinodes);
+ } else { /* Zero out the local statfs inode */
+ memset(bh->b_data + sizeof(struct gfs2_dinode), 0,
+ sizeof(struct gfs2_statfs_change));
+ /* If it's our own journal, reset any in-memory changes too */
+ if (jd->jd_jid == sdp->sd_lockstruct.ls_jid) {
+ memset(&sdp->sd_statfs_local, 0,
+ sizeof(struct gfs2_statfs_change_host));
+ }
+ }
+ spin_unlock(&sdp->sd_statfs_spin);
+
+ mark_buffer_dirty(bh);
+ brelse(bh);
+ gfs2_meta_sync(ip->i_gl);
+
+out:
+ return error;
+}
+
+/**
+ * recover_local_statfs - Update the master and local statfs changes for this
+ * journal.
+ *
+ * Previously, statfs updates would be read in from the local statfs inode and
+ * synced to the master statfs inode during recovery.
+ *
+ * We now use the statfs updates in the journal head to update the master statfs
+ * inode instead of reading in from the local statfs inode. To preserve backward
+ * compatibility with kernels that can't do this, we still need to keep the
+ * local statfs inode up to date by writing changes to it. At some point in the
+ * future, we can do away with the local statfs inodes altogether and keep the
+ * statfs changes solely in the journal.
+ *
+ * @jd: the journal
+ * @head: the journal head
+ *
+ * Returns: errno
+ */
+static void recover_local_statfs(struct gfs2_jdesc *jd,
+ struct gfs2_log_header_host *head)
+{
+ int error;
+ struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+
+ if (!head->lh_local_total && !head->lh_local_free
+ && !head->lh_local_dinodes) /* No change */
+ goto zero_local;
+
+ /* First update the master statfs inode with the changes we
+ * found in the journal. */
+ error = update_statfs_inode(jd, head, sdp->sd_statfs_inode);
+ if (error)
+ goto out;
+
+zero_local:
+ /* Zero out the local statfs inode so any changes in there
+ * are not re-recovered. */
+ error = update_statfs_inode(jd, NULL,
+ find_local_statfs_inode(sdp, jd->jd_jid));
+out:
+ return;
+}
+
void gfs2_recover_func(struct work_struct *work)
{
struct gfs2_jdesc *jd = container_of(work, struct gfs2_jdesc, jd_work);
@@ -415,6 +518,7 @@ void gfs2_recover_func(struct work_struct *work)
goto fail_gunlock_thaw;
}
+ recover_local_statfs(jd, &head);
clean_journal(jd, &head);
up_read(&sdp->sd_log_flush_lock);