Create a Hardlink
SYNOPSIS
size[4] Tlink tag[2] dfid[4] oldfid[4] newpath[s]
size[4] Rlink tag[2]
DESCRIPTION
Create a link 'newpath' in directory pointed by dfid linking to oldfid path.
[sripathik@xxxxxxxxxx : p9_client_link should not free req structure
if p9_client_rpc has returned an error.]
Signed-off-by: Venkateswararao Jujjuri <jvrao@xxxxxxxxxxxxxxxxxx>
---
fs/9p/vfs_inode.c | 65 ++++++++++++++++++++++++++++++++++++++++++++++-
include/net/9p/9p.h | 2 +
include/net/9p/client.h | 1 +
net/9p/client.c | 19 +++++++++++++
4 files changed, 86 insertions(+), 1 deletions(-)
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 4331b3b..2cbc651 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1186,6 +1186,69 @@ clunk_fid:
}
/**
+ * v9fs_vfs_link_dotl - create a hardlink for dotl
+ * @old_dentry: dentry for file to link to
+ * @dir: inode destination for new link
+ * @dentry: dentry for link
+ *
+ */
+
+static int
+v9fs_vfs_link_dotl(struct dentry *old_dentry, struct inode *dir,
+ struct dentry *dentry)
+{
+ int err;
+ struct p9_fid *dfid, *oldfid;
+ char *name;
+ struct v9fs_session_info *v9ses;
+
+ P9_DPRINTK(P9_DEBUG_VFS, "dir ino: %lu, old_name: %s, new_name: %s\n",
+ dir->i_ino, old_dentry->d_name.name,
+ dentry->d_name.name);
+
+ v9ses = v9fs_inode2v9ses(dir);
+ dfid = v9fs_fid_lookup(dentry->d_parent);
+ if (IS_ERR(dfid))
+ return PTR_ERR(dfid);
+
+ oldfid = v9fs_fid_lookup(old_dentry);
+ if (IS_ERR(oldfid))
+ return PTR_ERR(oldfid);
+
+ name = (char *) dentry->d_name.name;
+
+ err = p9_client_link(dfid, oldfid, (char *)dentry->d_name.name);
+
+ if (err < 0) {
+ P9_DPRINTK(P9_DEBUG_VFS, "p9_client_link failed %d\n", err);
+ return err;
+ }
+
+ if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) {
+ /* Get the latest stat info from server. */
+ struct p9_stat_dotl *st;
+
+ st = p9_client_getattr_dotl(oldfid);
+ if (IS_ERR(st))
+ return PTR_ERR(st);
+
+ v9fs_stat2inode_dotl(st, old_dentry->d_inode);
+
+ kfree(st);
+ } else {
+ /* Caching disabled. No need to get upto date stat info.
+ * This dentry will be released immediately. So, just i_count++
+ */
+ atomic_inc(&old_dentry->d_inode->i_count);
+ }
+
+ dentry->d_op = old_dentry->d_op;
+ d_instantiate(dentry, old_dentry->d_inode);
+
+ return err;
+}
+
+/**
* v9fs_vfs_mknod - create a special file
* @dir: inode destination for new link
* @dentry: dentry for file
@@ -1248,7 +1311,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = {
.create = v9fs_vfs_create,
.lookup = v9fs_vfs_lookup,
.symlink = v9fs_vfs_symlink,
- .link = v9fs_vfs_link,
+ .link = v9fs_vfs_link_dotl,
.unlink = v9fs_vfs_unlink,
.mkdir = v9fs_vfs_mkdir,
.rmdir = v9fs_vfs_rmdir,
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index f1b0b31..6df324e 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -135,6 +135,8 @@ enum p9_msg_t {
P9_RRENAME,
P9_TREADDIR = 40,
P9_RREADDIR,
+ P9_TLINK = 70,
+ P9_RLINK,
P9_TVERSION = 100,
P9_RVERSION,
P9_TAUTH = 102,
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 2ec9368..ccb2bbd 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -226,6 +226,7 @@ struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames,
int p9_client_open(struct p9_fid *fid, int mode);
int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode,
char *extension);
+int p9_client_link(struct p9_fid *fid, struct p9_fid *oldfid, char *newname);
int p9_client_clunk(struct p9_fid *fid);
int p9_client_remove(struct p9_fid *fid);
int p9_client_read(struct p9_fid *fid, char *data, char __user *udata,
diff --git a/net/9p/client.c b/net/9p/client.c
index 4ff068e..c822224 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1095,6 +1095,25 @@ error:
}
EXPORT_SYMBOL(p9_client_fcreate);
+int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname)
+{
+ struct p9_client *clnt;
+ struct p9_req_t *req;
+
+ P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n",
+ dfid->fid, oldfid->fid, newname);
+ clnt = dfid->clnt;
+ req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid,
+ newname);
+ if (IS_ERR(req))
+ return PTR_ERR(req);
+
+ P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n");
+ p9_free_req(clnt, req);
+ return 0;
+}
+EXPORT_SYMBOL(p9_client_link);
+
int p9_client_clunk(struct p9_fid *fid)
{
int err;
--
1.6.5.2
--
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