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Commit 0ed07ddb authored by Jens Axboe's avatar Jens Axboe
Browse files

9p: add bdi backing to mount session 



This ensures that dirty data gets flushed properly.

Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
parent c3c53206

fs/9p/v9fs.c

+10 −0
Original line number Original line Diff line number Diff line
@@ -238,6 +238,13 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, 
		return ERR_PTR(-ENOMEM);

		return ERR_PTR(-ENOMEM);

	}

	}





	rc = bdi_setup_and_register(&v9ses->bdi, "9p", BDI_CAP_MAP_COPY);

	if (rc) {

		__putname(v9ses->aname);

		__putname(v9ses->uname);

		return ERR_PTR(rc);

	}



	spin_lock(&v9fs_sessionlist_lock);

	spin_lock(&v9fs_sessionlist_lock);

	list_add(&v9ses->slist, &v9fs_sessionlist);

	list_add(&v9ses->slist, &v9fs_sessionlist);

	spin_unlock(&v9fs_sessionlist_lock);

	spin_unlock(&v9fs_sessionlist_lock);
@@ -301,6 +308,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, 
	return fid;

	return fid;





error:

error:

	bdi_destroy(&v9ses->bdi);

	return ERR_PTR(retval);

	return ERR_PTR(retval);

}

}
@@ -326,6 +334,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses) 
	__putname(v9ses->uname);

	__putname(v9ses->uname);

	__putname(v9ses->aname);

	__putname(v9ses->aname);





	bdi_destroy(&v9ses->bdi);



	spin_lock(&v9fs_sessionlist_lock);

	spin_lock(&v9fs_sessionlist_lock);

	list_del(&v9ses->slist);

	list_del(&v9ses->slist);

	spin_unlock(&v9fs_sessionlist_lock);

	spin_unlock(&v9fs_sessionlist_lock);

fs/9p/v9fs.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -20,6 +20,7 @@ 
 *  Boston, MA  02111-1301  USA

 *  Boston, MA  02111-1301  USA

 *

 *

 */

 */

#include <linux/backing-dev.h>





/**

/**

 * enum p9_session_flags - option flags for each 9P session

 * enum p9_session_flags - option flags for each 9P session
@@ -102,6 +103,7 @@ struct v9fs_session_info { 
	u32 uid;		/* if ACCESS_SINGLE, the uid that has access */

	u32 uid;		/* if ACCESS_SINGLE, the uid that has access */

	struct p9_client *clnt;	/* 9p client */

	struct p9_client *clnt;	/* 9p client */

	struct list_head slist; /* list of sessions registered with v9fs */

	struct list_head slist; /* list of sessions registered with v9fs */

	struct backing_dev_info bdi;

};

};





struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,

struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,

fs/9p/vfs_super.c

+1 −0
Original line number Original line Diff line number Diff line
@@ -77,6 +77,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses, 
	sb->s_blocksize = 1 << sb->s_blocksize_bits;

	sb->s_blocksize = 1 << sb->s_blocksize_bits;

	sb->s_magic = V9FS_MAGIC;

	sb->s_magic = V9FS_MAGIC;

	sb->s_op = &v9fs_super_ops;

	sb->s_op = &v9fs_super_ops;

	sb->s_bdi = &v9ses->bdi;





	sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |

	sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC |

	    MS_NOATIME;

	    MS_NOATIME;