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9p: Make sure we are able to clunk the cached fid on umount

Browse source 
dcache prune happen on umount. So we cannot mark the client
satus disconnect. That will prevent a 9p call to the server

Signed-off-by: Aneesh Kumar K.V <[email protected]>
Signed-off-by: Eric Van Hensbergen <[email protected]>
This commit is contained in:
Aneesh Kumar K.V 2010-03-29 18:13:59 -05:00 • committed by Eric Van Hensbergen
commit 6d96d3ab7a
5 changed files with 34 additions and 3 deletions
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13
fs/9p/v9fs.c
View file

@ -342,6 +342,19 @@ void v9fs_session_cancel(struct v9fs_session_info *v9ses) {
p9_client_disconnect(v9ses->clnt);
}
/**
* v9fs_session_begin_cancel - Begin terminate of a session
* @v9ses: session to terminate
*
* After this call we don't allow any request other than clunk.
*/
void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses)
{
P9_DPRINTK(P9_DEBUG_ERROR, "begin cancel session %p\n", v9ses);
p9_client_begin_disconnect(v9ses->clnt);
}
extern int v9fs_error_init(void);
static struct kobject *v9fs_kobj;

1
fs/9p/v9fs.h
View file

@ -108,6 +108,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
char *);
void v9fs_session_close(struct v9fs_session_info *v9ses);
void v9fs_session_cancel(struct v9fs_session_info *v9ses);
void v9fs_session_begin_cancel(struct v9fs_session_info *v9ses);
#define V9FS_MAGIC 0x01021997

3
fs/9p/vfs_super.c
View file

@ -193,6 +193,7 @@ static void v9fs_kill_super(struct super_block *s)
kill_anon_super(s);
v9fs_session_cancel(v9ses);
v9fs_session_close(v9ses);
kfree(v9ses);
s->s_fs_info = NULL;
@ -205,7 +206,7 @@ v9fs_umount_begin(struct super_block *sb)
struct v9fs_session_info *v9ses;
v9ses = sb->s_fs_info;
v9fs_session_cancel(v9ses);
v9fs_session_begin_cancel(v9ses);
}
static const struct super_operations v9fs_super_ops = {