From 0ed07ddb56d1348e5ce33f3b8de20d730351983a Mon Sep 17 00:00:00 2001 From: Jens Axboe Date: Thu, 22 Apr 2010 11:42:00 +0200 Subject: [PATCH] 9p: add bdi backing to mount session This ensures that dirty data gets flushed properly. Signed-off-by: Jens Axboe --- fs/9p/v9fs.c | 10 ++++++++++ fs/9p/v9fs.h | 2 ++ fs/9p/vfs_super.c | 1 + 3 files changed, 13 insertions(+) diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c index 5c5bc848007..f8b86e92cd6 100644 --- a/fs/9p/v9fs.c +++ b/fs/9p/v9fs.c @@ -238,6 +238,13 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, 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); list_add(&v9ses->slist, &v9fs_sessionlist); spin_unlock(&v9fs_sessionlist_lock); @@ -301,6 +308,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses, return fid; error: + bdi_destroy(&v9ses->bdi); return ERR_PTR(retval); } @@ -326,6 +334,8 @@ void v9fs_session_close(struct v9fs_session_info *v9ses) __putname(v9ses->uname); __putname(v9ses->aname); + bdi_destroy(&v9ses->bdi); + spin_lock(&v9fs_sessionlist_lock); list_del(&v9ses->slist); spin_unlock(&v9fs_sessionlist_lock); diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h index a0a8d3dd136..bec4d0bcb45 100644 --- a/fs/9p/v9fs.h +++ b/fs/9p/v9fs.h @@ -20,6 +20,7 @@ * Boston, MA 02111-1301 USA * */ +#include /** * 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 */ struct p9_client *clnt; /* 9p client */ 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 *, diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c index 491108bd6e0..806da5d3b3a 100644 --- a/fs/9p/vfs_super.c +++ b/fs/9p/vfs_super.c @@ -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_magic = V9FS_MAGIC; sb->s_op = &v9fs_super_ops; + sb->s_bdi = &v9ses->bdi; sb->s_flags = flags | MS_ACTIVE | MS_SYNCHRONOUS | MS_DIRSYNC | MS_NOATIME; -- 2.11.4.GIT