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ocfs2: add trimfs dlm lock resource

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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
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29
fs/ocfs2/dlmglue.h
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@@ -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);