summaryrefslogtreecommitdiff
path: root/fs/ocfs2/dlmglue.c
diff options
context:
space:
mode:
authorGang He <ghe@suse.com>2018-02-01 03:15:10 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2018-02-01 04:18:35 +0300
commit4882abebccb58d68056462b66cea0d7f16169c39 (patch)
tree5d6a2c2947f447e246dd349d4f170fb853715bf5 /fs/ocfs2/dlmglue.c
parent71a36944042b7d9dd71f6a5d1c5ea1c2353b5d42 (diff)
downloadlinux-4882abebccb58d68056462b66cea0d7f16169c39.tar.xz
ocfs2: add trimfs dlm lock resource
Introduce a new dlm lock resource, which will be used to communicate during fstrimming of an ocfs2 device from cluster nodes. Link: http://lkml.kernel.org/r/1513228484-2084-1-git-send-email-ghe@suse.com Signed-off-by: Gang He <ghe@suse.com> Reviewed-by: Changwei Ge <ge.changwei@h3c.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <jiangqi903@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
-rw-r--r--fs/ocfs2/dlmglue.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 5193218f5889..f5643e3ff317 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -259,6 +259,10 @@ static struct ocfs2_lock_res_ops ocfs2_nfs_sync_lops = {
.flags = 0,
};
+static struct ocfs2_lock_res_ops ocfs2_trim_fs_lops = {
+ .flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
+};
+
static struct ocfs2_lock_res_ops ocfs2_orphan_scan_lops = {
.flags = LOCK_TYPE_REQUIRES_REFRESH|LOCK_TYPE_USES_LVB,
};
@@ -676,6 +680,24 @@ static void ocfs2_nfs_sync_lock_res_init(struct ocfs2_lock_res *res,
&ocfs2_nfs_sync_lops, osb);
}
+void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb)
+{
+ struct ocfs2_lock_res *lockres = &osb->osb_trim_fs_lockres;
+
+ ocfs2_lock_res_init_once(lockres);
+ ocfs2_build_lock_name(OCFS2_LOCK_TYPE_TRIM_FS, 0, 0, lockres->l_name);
+ ocfs2_lock_res_init_common(osb, lockres, OCFS2_LOCK_TYPE_TRIM_FS,
+ &ocfs2_trim_fs_lops, osb);
+}
+
+void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb)
+{
+ struct ocfs2_lock_res *lockres = &osb->osb_trim_fs_lockres;
+
+ ocfs2_simple_drop_lockres(osb, lockres);
+ ocfs2_lock_res_free(lockres);
+}
+
static void ocfs2_orphan_scan_lock_res_init(struct ocfs2_lock_res *res,
struct ocfs2_super *osb)
{
@@ -2754,6 +2776,70 @@ void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex)
ex ? LKM_EXMODE : LKM_PRMODE);
}
+int ocfs2_trim_fs_lock(struct ocfs2_super *osb,
+ struct ocfs2_trim_fs_info *info, int trylock)
+{
+ int status;
+ struct ocfs2_trim_fs_lvb *lvb;
+ struct ocfs2_lock_res *lockres = &osb->osb_trim_fs_lockres;
+
+ if (info)
+ info->tf_valid = 0;
+
+ if (ocfs2_is_hard_readonly(osb))
+ return -EROFS;
+
+ if (ocfs2_mount_local(osb))
+ return 0;
+
+ status = ocfs2_cluster_lock(osb, lockres, DLM_LOCK_EX,
+ trylock ? DLM_LKF_NOQUEUE : 0, 0);
+ if (status < 0) {
+ if (status != -EAGAIN)
+ mlog_errno(status);
+ return status;
+ }
+
+ if (info) {
+ lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
+ if (ocfs2_dlm_lvb_valid(&lockres->l_lksb) &&
+ lvb->lvb_version == OCFS2_TRIMFS_LVB_VERSION) {
+ info->tf_valid = 1;
+ info->tf_success = lvb->lvb_success;
+ info->tf_nodenum = be32_to_cpu(lvb->lvb_nodenum);
+ info->tf_start = be64_to_cpu(lvb->lvb_start);
+ info->tf_len = be64_to_cpu(lvb->lvb_len);
+ info->tf_minlen = be64_to_cpu(lvb->lvb_minlen);
+ info->tf_trimlen = be64_to_cpu(lvb->lvb_trimlen);
+ }
+ }
+
+ return status;
+}
+
+void ocfs2_trim_fs_unlock(struct ocfs2_super *osb,
+ struct ocfs2_trim_fs_info *info)
+{
+ struct ocfs2_trim_fs_lvb *lvb;
+ struct ocfs2_lock_res *lockres = &osb->osb_trim_fs_lockres;
+
+ if (ocfs2_mount_local(osb))
+ return;
+
+ if (info) {
+ lvb = ocfs2_dlm_lvb(&lockres->l_lksb);
+ lvb->lvb_version = OCFS2_TRIMFS_LVB_VERSION;
+ lvb->lvb_success = info->tf_success;
+ lvb->lvb_nodenum = cpu_to_be32(info->tf_nodenum);
+ lvb->lvb_start = cpu_to_be64(info->tf_start);
+ lvb->lvb_len = cpu_to_be64(info->tf_len);
+ lvb->lvb_minlen = cpu_to_be64(info->tf_minlen);
+ lvb->lvb_trimlen = cpu_to_be64(info->tf_trimlen);
+ }
+
+ ocfs2_cluster_unlock(osb, lockres, DLM_LOCK_EX);
+}
+
int ocfs2_dentry_lock(struct dentry *dentry, int ex)
{
int ret;