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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>
This commit is contained in:
Gang He 2018-01-31 16:15:10 -08:00 committed by Linus Torvalds
parent 71a3694404
commit 4882abebcc
4 changed files with 121 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

86
fs/ocfs2/dlmglue.c
View File

@ -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;

29
fs/ocfs2/dlmglue.h
View File

@ -70,6 +70,29 @@ struct ocfs2_orphan_scan_lvb {
__be32 lvb_os_seqno;
};
#define OCFS2_TRIMFS_LVB_VERSION 1
struct ocfs2_trim_fs_lvb {
__u8 lvb_version;
__u8 lvb_success;
__u8 lvb_reserved[2];
__be32 lvb_nodenum;
__be64 lvb_start;
__be64 lvb_len;
__be64 lvb_minlen;
__be64 lvb_trimlen;
};
struct ocfs2_trim_fs_info {
u8 tf_valid; /* lvb is valid, or not */
u8 tf_success; /* trim is successful, or not */
u32 tf_nodenum; /* osb node number */
u64 tf_start; /* trim start offset in clusters */
u64 tf_len; /* trim end offset in clusters */
u64 tf_minlen; /* trim minimum contiguous free clusters */
u64 tf_trimlen; /* trimmed length in bytes */
};
struct ocfs2_lock_holder {
struct list_head oh_list;
struct pid *oh_owner_pid;
@ -153,6 +176,12 @@ int ocfs2_rename_lock(struct ocfs2_super *osb);
void ocfs2_rename_unlock(struct ocfs2_super *osb);
int ocfs2_nfs_sync_lock(struct ocfs2_super *osb, int ex);
void ocfs2_nfs_sync_unlock(struct ocfs2_super *osb, int ex);
void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb);
void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb);
int ocfs2_trim_fs_lock(struct ocfs2_super *osb,
struct ocfs2_trim_fs_info *info, int trylock);
void ocfs2_trim_fs_unlock(struct ocfs2_super *osb,
struct ocfs2_trim_fs_info *info);
int ocfs2_dentry_lock(struct dentry *dentry, int ex);
void ocfs2_dentry_unlock(struct dentry *dentry, int ex);
int ocfs2_file_lock(struct file *file, int ex, int trylock);

1
fs/ocfs2/ocfs2.h
View File

@ -404,6 +404,7 @@ struct ocfs2_super
struct ocfs2_lock_res osb_super_lockres;
struct ocfs2_lock_res osb_rename_lockres;
struct ocfs2_lock_res osb_nfs_sync_lockres;
struct ocfs2_lock_res osb_trim_fs_lockres;
struct ocfs2_dlm_debug *osb_dlm_debug;
struct dentry *osb_debug_root;

5
fs/ocfs2/ocfs2_lockid.h
View File

@ -50,6 +50,7 @@ enum ocfs2_lock_type {
OCFS2_LOCK_TYPE_NFS_SYNC,
OCFS2_LOCK_TYPE_ORPHAN_SCAN,
OCFS2_LOCK_TYPE_REFCOUNT,
OCFS2_LOCK_TYPE_TRIM_FS,
OCFS2_NUM_LOCK_TYPES
};
@ -93,6 +94,9 @@ static inline char ocfs2_lock_type_char(enum ocfs2_lock_type type)
case OCFS2_LOCK_TYPE_REFCOUNT:
c = 'T';
break;
case OCFS2_LOCK_TYPE_TRIM_FS:
c = 'I';
break;
default:
c = '\0';
}
@ -115,6 +119,7 @@ static char *ocfs2_lock_type_strings[] = {
[OCFS2_LOCK_TYPE_NFS_SYNC] = "NFSSync",
[OCFS2_LOCK_TYPE_ORPHAN_SCAN] = "OrphanScan",
[OCFS2_LOCK_TYPE_REFCOUNT] = "Refcount",
[OCFS2_LOCK_TYPE_TRIM_FS] = "TrimFs",
};
static inline const char *ocfs2_lock_type_string(enum ocfs2_lock_type type)