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-rw-r--r--fs/ocfs2/alloc.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index b3321de88d2b..9a876bb07cac 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -7561,6 +7561,7 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
struct buffer_head *gd_bh = NULL;
struct ocfs2_dinode *main_bm;
struct ocfs2_group_desc *gd = NULL;
+ struct ocfs2_trim_fs_info info, *pinfo = NULL;
start = range->start >> osb->s_clustersize_bits;
len = range->len >> osb->s_clustersize_bits;
@@ -7598,6 +7599,42 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
trace_ocfs2_trim_fs(start, len, minlen);
+ ocfs2_trim_fs_lock_res_init(osb);
+ ret = ocfs2_trim_fs_lock(osb, NULL, 1);
+ if (ret < 0) {
+ if (ret != -EAGAIN) {
+ mlog_errno(ret);
+ ocfs2_trim_fs_lock_res_uninit(osb);
+ goto out_unlock;
+ }
+
+ mlog(ML_NOTICE, "Wait for trim on device (%s) to "
+ "finish, which is running from another node.\n",
+ osb->dev_str);
+ ret = ocfs2_trim_fs_lock(osb, &info, 0);
+ if (ret < 0) {
+ mlog_errno(ret);
+ ocfs2_trim_fs_lock_res_uninit(osb);
+ goto out_unlock;
+ }
+
+ if (info.tf_valid && info.tf_success &&
+ info.tf_start == start && info.tf_len == len &&
+ info.tf_minlen == minlen) {
+ /* Avoid sending duplicated trim to a shared device */
+ mlog(ML_NOTICE, "The same trim on device (%s) was "
+ "just done from node (%u), return.\n",
+ osb->dev_str, info.tf_nodenum);
+ range->len = info.tf_trimlen;
+ goto out_trimunlock;
+ }
+ }
+
+ info.tf_nodenum = osb->node_num;
+ info.tf_start = start;
+ info.tf_len = len;
+ info.tf_minlen = minlen;
+
/* Determine first and last group to examine based on start and len */
first_group = ocfs2_which_cluster_group(main_bm_inode, start);
if (first_group == osb->first_cluster_group_blkno)
@@ -7642,6 +7679,13 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
group += ocfs2_clusters_to_blocks(sb, osb->bitmap_cpg);
}
range->len = trimmed * sb->s_blocksize;
+
+ info.tf_trimlen = range->len;
+ info.tf_success = (ret ? 0 : 1);
+ pinfo = &info;
+out_trimunlock:
+ ocfs2_trim_fs_unlock(osb, pinfo);
+ ocfs2_trim_fs_lock_res_uninit(osb);
out_unlock:
ocfs2_inode_unlock(main_bm_inode, 0);
brelse(main_bm_bh);