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fuse: introduce per-instance fuse_dev structure

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Allow fuse device clones to refer to be distinguished.  This patch just
adds the infrastructure by associating a separate "struct fuse_dev" with
each clone.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Reviewed-by: Ashish Samant <ashish.samant@oracle.com>
This commit is contained in:
Miklos Szeredi
2015-07-01 16:26:08 +02:00
parent 00c570f4ba
commit cc080e9e9b
4 changed files with 114 additions and 34 deletions
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14
fs/fuse/cuse.c
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@@ -489,6 +489,7 @@ static void cuse_fc_release(struct fuse_conn *fc)
*/
static int cuse_channel_open(struct inode *inode, struct file *file)
{
struct fuse_dev *fud;
struct cuse_conn *cc;
int rc;
@@ -499,16 +500,22 @@ static int cuse_channel_open(struct inode *inode, struct file *file)
fuse_conn_init(&cc->fc);
fud = fuse_dev_alloc(&cc->fc);
if (!fud) {
kfree(cc);
return -ENOMEM;
}
INIT_LIST_HEAD(&cc->list);
cc->fc.release = cuse_fc_release;
cc->fc.initialized = 1;
rc = cuse_send_init(cc);
if (rc) {
fuse_conn_put(&cc->fc);
fuse_dev_free(fud);
return rc;
}
file->private_data = &cc->fc; /* channel owns base reference to cc */
file->private_data = fud;
return 0;
}
@@ -526,7 +533,8 @@ static int cuse_channel_open(struct inode *inode, struct file *file)
*/
static int cuse_channel_release(struct inode *inode, struct file *file)
{
struct cuse_conn *cc = fc_to_cc(file->private_data);
struct fuse_dev *fud = file->private_data;
struct cuse_conn *cc = fc_to_cc(fud->fc);
int rc;
/* remove from the conntbl, no more access from this point on */