Commit 01a622bd authored by M. Mohan Kumar's avatar M. Mohan Kumar Committed by Eric Van Hensbergen
Browse files

9p: Implement TMKDIR 



Implement TMKDIR as part of 2000.L Work

Synopsis

    size[4] Tmkdir tag[2] fid[4] name[s] mode[4] gid[4]

    size[4] Rmkdir tag[2] qid[13]

Description

    mkdir asks the file server to create a directory with given name,
    mode and gid. The qid for the new directory is returned with
    the mkdir reply message.

Note: 72 is selected as the opcode for TMKDIR from the reserved list.

Signed-off-by: default avatarM. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: default avatarVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
Signed-off-by: default avatarEric Van Hensbergen <ericvh@gmail.com>
parent 4b43516a

fs/9p/vfs_inode.c

+80 −3
Original line number Diff line number Diff line
@@ -731,6 +731,83 @@ static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) 
	return err;

}





/**

 * v9fs_vfs_mkdir_dotl - VFS mkdir hook to create a directory

 * @dir:  inode that is being unlinked

 * @dentry: dentry that is being unlinked

 * @mode: mode for new directory

 *

 */



static int v9fs_vfs_mkdir_dotl(struct inode *dir, struct dentry *dentry,

					int mode)

{

	int err;

	struct v9fs_session_info *v9ses;

	struct p9_fid *fid = NULL, *dfid = NULL;

	gid_t gid;

	char *name;

	struct inode *inode;

	struct p9_qid qid;

	struct dentry *dir_dentry;



	P9_DPRINTK(P9_DEBUG_VFS, "name %s\n", dentry->d_name.name);

	err = 0;

	v9ses = v9fs_inode2v9ses(dir);



	mode |= S_IFDIR;

	dir_dentry = v9fs_dentry_from_dir_inode(dir);

	dfid = v9fs_fid_lookup(dir_dentry);

	if (IS_ERR(dfid)) {

		err = PTR_ERR(dfid);

		P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);

		dfid = NULL;

		goto error;

	}



	gid = v9fs_get_fsgid_for_create(dir);

	if (gid < 0) {

		P9_DPRINTK(P9_DEBUG_VFS, "v9fs_get_fsgid_for_create failed\n");

		goto error;

	}



	name = (char *) dentry->d_name.name;

	err = p9_client_mkdir_dotl(dfid, name, mode, gid, &qid);

	if (err < 0)

		goto error;



	/* instantiate inode and assign the unopened fid to the dentry */

	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {

		fid = p9_client_walk(dfid, 1, &name, 1);

		if (IS_ERR(fid)) {

			err = PTR_ERR(fid);

			P9_DPRINTK(P9_DEBUG_VFS, "p9_client_walk failed %d\n",

				err);

			fid = NULL;

			goto error;

		}



		inode = v9fs_inode_from_fid(v9ses, fid, dir->i_sb);

		if (IS_ERR(inode)) {

			err = PTR_ERR(inode);

			P9_DPRINTK(P9_DEBUG_VFS, "inode creation failed %d\n",

				err);

			goto error;

		}

		dentry->d_op = &v9fs_cached_dentry_operations;

		d_instantiate(dentry, inode);

		err = v9fs_fid_add(dentry, fid);

		if (err < 0)

			goto error;

		fid = NULL;

	}

error:

	if (fid)

		p9_client_clunk(fid);

	return err;

}



/**

 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode

 * @dir:  inode that is being walked from
@@ -1641,7 +1718,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, 
	struct inode *inode;

	gid_t gid;

	struct p9_qid qid;

	struct dentry *dir_entry;

	struct dentry *dir_dentry;



	P9_DPRINTK(P9_DEBUG_VFS,

		" %lu,%s mode: %x MAJOR: %u MINOR: %u\n", dir->i_ino,
@@ -1652,7 +1729,7 @@ v9fs_vfs_mknod_dotl(struct inode *dir, struct dentry *dentry, int mode, 


	v9ses = v9fs_inode2v9ses(dir);

	dir_dentry = v9fs_dentry_from_dir_inode(dir);

	dfid = v9fs_fid_lookup(dir_entry);

	dfid = v9fs_fid_lookup(dir_dentry);

	if (IS_ERR(dfid)) {

		err = PTR_ERR(dfid);

		P9_DPRINTK(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
@@ -1736,7 +1813,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = { 
	.link = v9fs_vfs_link_dotl,

	.symlink = v9fs_vfs_symlink_dotl,

	.unlink = v9fs_vfs_unlink,

	.mkdir = v9fs_vfs_mkdir,

	.mkdir = v9fs_vfs_mkdir_dotl,

	.rmdir = v9fs_vfs_rmdir,

	.mknod = v9fs_vfs_mknod_dotl,

	.rename = v9fs_vfs_rename,

include/net/9p/9p.h

+4 −0
Original line number Diff line number Diff line
@@ -94,6 +94,8 @@ do { \ 
 * @P9_RMKNOD: create a special file object response

 * @P9_TRENAME: rename request

 * @P9_RRENAME: rename response

 * @P9_TMKDIR: create a directory request

 * @P9_RMKDIR: create a directory response

 * @P9_TVERSION: version handshake request

 * @P9_RVERSION: version handshake response

 * @P9_TAUTH: request to establish authentication channel
@@ -149,6 +151,8 @@ enum p9_msg_t { 
	P9_RREADDIR,

	P9_TLINK = 70,

	P9_RLINK,

	P9_TMKDIR = 72,

	P9_RMKDIR,

	P9_TVERSION = 100,

	P9_RVERSION,

	P9_TAUTH = 102,

include/net/9p/client.h

+2 −0
Original line number Diff line number Diff line
@@ -247,6 +247,8 @@ struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, 


int p9_client_mknod_dotl(struct p9_fid *oldfid, char *name, int mode,

			dev_t rdev, gid_t gid, struct p9_qid *);

int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,

				gid_t gid, struct p9_qid *);

struct p9_req_t *p9_tag_lookup(struct p9_client *, u16);

void p9_client_cb(struct p9_client *c, struct p9_req_t *req);

net/9p/client.c

+31 −0
Original line number Diff line number Diff line
@@ -1653,3 +1653,34 @@ error: 


}

EXPORT_SYMBOL(p9_client_mknod_dotl);



int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode,

				gid_t gid, struct p9_qid *qid)

{

	int err;

	struct p9_client *clnt;

	struct p9_req_t *req;



	err = 0;

	clnt = fid->clnt;

	P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n",

		 fid->fid, name, mode, gid);

	req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode,

		gid);

	if (IS_ERR(req))

		return PTR_ERR(req);



	err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid);

	if (err) {

		p9pdu_dump(1, req->rc);

		goto error;

	}

	P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type,

				(unsigned long long)qid->path, qid->version);



error:

	p9_free_req(clnt, req);

	return err;



}

EXPORT_SYMBOL(p9_client_mkdir_dotl);

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