5 files changed, 122 insertions, 3 deletions

diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index afcb8d889382..a90324f4546a 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -977,6 +977,49 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
 }
 
 /**
+ * v9fs_vfs_setattr_dotl - set file metadata
+ * @dentry: file whose metadata to set
+ * @iattr: metadata assignment structure
+ *
+ */
+
+static int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
+{
+        int retval;
+        struct v9fs_session_info *v9ses;
+        struct p9_fid *fid;
+        struct p9_iattr_dotl p9attr;
+
+        P9_DPRINTK(P9_DEBUG_VFS, "\n");
+
+        retval = inode_change_ok(dentry->d_inode, iattr);
+        if (retval)
+                return retval;
+
+        p9attr.valid = iattr->ia_valid;
+        p9attr.mode = iattr->ia_mode;
+        p9attr.uid = iattr->ia_uid;
+        p9attr.gid = iattr->ia_gid;
+        p9attr.size = iattr->ia_size;
+        p9attr.atime_sec = iattr->ia_atime.tv_sec;
+        p9attr.atime_nsec = iattr->ia_atime.tv_nsec;
+        p9attr.mtime_sec = iattr->ia_mtime.tv_sec;
+        p9attr.mtime_nsec = iattr->ia_mtime.tv_nsec;
+
+        retval = -EPERM;
+        v9ses = v9fs_inode2v9ses(dentry->d_inode);
+        fid = v9fs_fid_lookup(dentry);
+        if (IS_ERR(fid))
+                return PTR_ERR(fid);
+
+        retval = p9_client_setattr(fid, &p9attr);
+        if (retval >= 0)
+                retval = inode_setattr(dentry->d_inode, iattr);
+
+        return retval;
+}
+
+/**
  * v9fs_stat2inode - populate an inode structure with mistat info
  * @stat: Plan 9 metadata (mistat) structure
  * @inode: inode to populate
@@ -1400,7 +1443,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = {
         .mknod = v9fs_vfs_mknod,
         .rename = v9fs_vfs_rename,
         .getattr = v9fs_vfs_getattr_dotl,
-        .setattr = v9fs_vfs_setattr,
+        .setattr = v9fs_vfs_setattr_dotl,
 };
 
 static const struct inode_operations v9fs_dir_inode_operations = {
@@ -1422,7 +1465,7 @@ static const struct inode_operations v9fs_file_inode_operations = {
 
 static const struct inode_operations v9fs_file_inode_operations_dotl = {
         .getattr = v9fs_vfs_getattr_dotl,
-        .setattr = v9fs_vfs_setattr,
+        .setattr = v9fs_vfs_setattr_dotl,
 };
 
 static const struct inode_operations v9fs_symlink_inode_operations = {
@@ -1438,5 +1481,5 @@ static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
         .follow_link = v9fs_vfs_follow_link,
         .put_link = v9fs_vfs_put_link,
         .getattr = v9fs_vfs_getattr_dotl,
-        .setattr = v9fs_vfs_setattr,
+        .setattr = v9fs_vfs_setattr_dotl,
 };
diff --git a/include/net/9p/9p.h b/include/net/9p/9p.h
index ab12e1c9cc7e..7f64d72f6c61 100644
--- a/include/net/9p/9p.h
+++ b/include/net/9p/9p.h
@@ -135,6 +135,8 @@ enum p9_msg_t {
         P9_RRENAME,
         P9_TGETATTR = 24,
         P9_RGETATTR,
+        P9_TSETATTR = 26,
+        P9_RSETATTR,
         P9_TREADDIR = 40,
         P9_RREADDIR,
         P9_TVERSION = 100,
@@ -406,6 +408,32 @@ struct p9_stat_dotl {
 #define P9_STATS_BASIC          0x000007ffULL /* Mask for fields up to BLOCKS */
 #define P9_STATS_ALL            0x00003fffULL /* Mask for All fields above */
 
+/**
+ * struct p9_iattr_dotl - P9 inode attribute for setattr
+ * @valid: bitfield specifying which fields are valid
+ *         same as in struct iattr
+ * @mode: File permission bits
+ * @uid: user id of owner
+ * @gid: group id
+ * @size: File size
+ * @atime_sec: Last access time, seconds
+ * @atime_nsec: Last access time, nanoseconds
+ * @mtime_sec: Last modification time, seconds
+ * @mtime_nsec: Last modification time, nanoseconds
+ */
+
+struct p9_iattr_dotl {
+        u32 valid;
+        u32 mode;
+        u32 uid;
+        u32 gid;
+        u64 size;
+        u64 atime_sec;
+        u64 atime_nsec;
+        u64 mtime_sec;
+        u64 mtime_nsec;
+};
+
 /* Structures for Protocol Operations */
 struct p9_tstatfs {
         u32 fid;
diff --git a/include/net/9p/client.h b/include/net/9p/client.h
index 6462eec435bc..afdc385152f6 100644
--- a/include/net/9p/client.h
+++ b/include/net/9p/client.h
@@ -237,6 +237,7 @@ int p9dirent_read(char *buf, int len, struct p9_dirent *dirent,
                                                         int proto_version);
 struct p9_wstat *p9_client_stat(struct p9_fid *fid);
 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst);
+int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *attr);
 
 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid,
                                                         u64 request_mask);
diff --git a/net/9p/client.c b/net/9p/client.c
index 5e97118da3bf..b2f70ec889c2 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -1426,6 +1426,36 @@ error:
 }
 EXPORT_SYMBOL(p9_client_wstat);
 
+int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr)
+{
+        int err;
+        struct p9_req_t *req;
+        struct p9_client *clnt;
+
+        err = 0;
+        clnt = fid->clnt;
+        P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid);
+        P9_DPRINTK(P9_DEBUG_9P,
+                "    valid=%x mode=%x uid=%d gid=%d size=%lld\n"
+                "    atime_sec=%lld atime_nsec=%lld\n"
+                "    mtime_sec=%lld mtime_nsec=%lld\n",
+                p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid,
+                p9attr->size, p9attr->atime_sec, p9attr->atime_nsec,
+                p9attr->mtime_sec, p9attr->mtime_nsec);
+
+        req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr);
+
+        if (IS_ERR(req)) {
+                err = PTR_ERR(req);
+                goto error;
+        }
+        P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid);
+        p9_free_req(clnt, req);
+error:
+        return err;
+}
+EXPORT_SYMBOL(p9_client_setattr);
+
 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb)
 {
         int err;
diff --git a/net/9p/protocol.c b/net/9p/protocol.c
index 3e4f77695891..3acd3afb20c8 100644
--- a/net/9p/protocol.c
+++ b/net/9p/protocol.c
@@ -516,6 +516,23 @@ p9pdu_vwritef(struct p9_fcall *pdu, int proto_version, const char *fmt,
                                 }
                         }
                         break;
+                case 'I':{
+                                struct p9_iattr_dotl *p9attr = va_arg(ap,
+                                                        struct p9_iattr_dotl *);
+
+                                errcode = p9pdu_writef(pdu, proto_version,
+                                                        "ddddqqqqq",
+                                                        p9attr->valid,
+                                                        p9attr->mode,
+                                                        p9attr->uid,
+                                                        p9attr->gid,
+                                                        p9attr->size,
+                                                        p9attr->atime_sec,
+                                                        p9attr->atime_nsec,
+                                                        p9attr->mtime_sec,
+                                                        p9attr->mtime_nsec);
+                        }
+                        break;
                 case '?':
                         if ((proto_version != p9_proto_2000u) &&
                                 (proto_version != p9_proto_2000L))