Commit 4681dbda authored by Sripathi Kodi's avatar Sripathi Kodi Committed by Eric Van Hensbergen
Browse files

9p: add 9P2000.L rename operation 



I made a V2 of this patch on top of my patches for VFS switches.
All the changes were due to change in some offsets.

rename - change name of file or directory

size[4] Trename tag[2] fid[4] newdirfid[4] name[s]
size[4] Rrename tag[2]

The rename message is used to change the name of a file, possibly moving it
to a new directory.  The 9P wstat message can only rename a file within the
same directory.

Signed-off-by: default avatarJim Garlick <garlick@llnl.gov>
Signed-off-by: default avatarSripathi Kodi <sripathik@in.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent bda8e775

fs/9p/vfs_inode.c

+7 −0
Original line number Diff line number Diff line
@@ -794,6 +794,13 @@ v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry, 
		goto clunk_olddir;

	}



	if (v9fs_proto_dotl(v9ses)) {

		retval = p9_client_rename(oldfid, newdirfid,

					(char *) new_dentry->d_name.name);

		if (retval != -ENOSYS)

			goto clunk_newdir;

	}



	/* 9P can only handle file rename in the same directory */

	if (memcmp(&olddirfid->qid, &newdirfid->qid, sizeof(newdirfid->qid))) {

		P9_DPRINTK(P9_DEBUG_ERROR,

include/net/9p/9p.h

+13 −0
Original line number Diff line number Diff line
@@ -88,6 +88,8 @@ do { \ 
 * enum p9_msg_t - 9P message types

 * @P9_TSTATFS: file system status request

 * @P9_RSTATFS: file system status response

 * @P9_TRENAME: rename request

 * @P9_RRENAME: rename response

 * @P9_TVERSION: version handshake request

 * @P9_RVERSION: version handshake response

 * @P9_TAUTH: request to establish authentication channel
@@ -129,6 +131,8 @@ do { \ 
enum p9_msg_t {

	P9_TSTATFS = 8,

	P9_RSTATFS,

	P9_TRENAME = 20,

	P9_RRENAME,

	P9_TVERSION = 100,

	P9_RVERSION,

	P9_TAUTH = 102,
@@ -370,6 +374,15 @@ struct p9_rstatfs { 
	u32 namelen;

};



struct p9_trename {

	u32 fid;

	u32 newdirfid;

	struct p9_str name;

};



struct p9_rrename {

};



struct p9_tversion {

	u32 msize;

	struct p9_str version;

include/net/9p/client.h

+1 −0
Original line number Diff line number Diff line
@@ -196,6 +196,7 @@ struct p9_fid { 
};



int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb);

int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name);

int p9_client_version(struct p9_client *);

struct p9_client *p9_client_create(const char *dev_name, char *options);

void p9_client_destroy(struct p9_client *clnt);

net/9p/client.c

+28 −0
Original line number Diff line number Diff line
@@ -1404,3 +1404,31 @@ error: 
	return err;

}

EXPORT_SYMBOL(p9_client_statfs);



int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name)

{

	int err;

	struct p9_req_t *req;

	struct p9_client *clnt;



	err = 0;

	clnt = fid->clnt;



	P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n",

			fid->fid, newdirfid->fid, name);



	req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid,

			newdirfid->fid, name);

	if (IS_ERR(req)) {

		err = PTR_ERR(req);

		goto error;

	}



	P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid);



	p9_free_req(clnt, req);

error:

	return err;

}

EXPORT_SYMBOL(p9_client_rename);

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