3 files changed, 187 insertions, 34 deletions

diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 32ef4009d030..f47c6bbb01b3 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -55,6 +55,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode);
 void v9fs_clear_inode(struct inode *inode);
 ino_t v9fs_qid2ino(struct p9_qid *qid);
 void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
+void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *);
 int v9fs_dir_release(struct inode *inode, struct file *filp);
 int v9fs_file_open(struct inode *inode, struct file *file);
 void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 4331b3b5ee1c..afcb8d889382 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -396,23 +396,14 @@ void v9fs_clear_inode(struct inode *inode)
 #endif
 }
 
-/**
- * v9fs_inode_from_fid - populate an inode by issuing a attribute request
- * @v9ses: session information
- * @fid: fid to issue attribute request for
- * @sb: superblock on which to create inode
- *
- */
-
 static struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+v9fs_inode(struct v9fs_session_info *v9ses, struct p9_fid *fid,
         struct super_block *sb)
 {
         int err, umode;
-        struct inode *ret;
+        struct inode *ret = NULL;
         struct p9_wstat *st;
 
-        ret = NULL;
         st = p9_client_stat(fid);
         if (IS_ERR(st))
                 return ERR_CAST(st);
@@ -433,15 +424,62 @@ v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
 #endif
         p9stat_free(st);
         kfree(st);
-
         return ret;
-
 error:
         p9stat_free(st);
         kfree(st);
         return ERR_PTR(err);
 }
 
+static struct inode *
+v9fs_inode_dotl(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+        struct super_block *sb)
+{
+        struct inode *ret = NULL;
+        int err;
+        struct p9_stat_dotl *st;
+
+        st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
+        if (IS_ERR(st))
+                return ERR_CAST(st);
+
+        ret = v9fs_get_inode(sb, st->st_mode);
+        if (IS_ERR(ret)) {
+                err = PTR_ERR(ret);
+                goto error;
+        }
+
+        v9fs_stat2inode_dotl(st, ret);
+        ret->i_ino = v9fs_qid2ino(&st->qid);
+#ifdef CONFIG_9P_FSCACHE
+        v9fs_vcookie_set_qid(ret, &st->qid);
+        v9fs_cache_inode_get_cookie(ret);
+#endif
+        kfree(st);
+        return ret;
+error:
+        kfree(st);
+        return ERR_PTR(err);
+}
+
+/**
+ * v9fs_inode_from_fid - Helper routine to populate an inode by
+ * issuing a attribute request
+ * @v9ses: session information
+ * @fid: fid to issue attribute request for
+ * @sb: superblock on which to create inode
+ *
+ */
+static inline struct inode *
+v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
+                        struct super_block *sb)
+{
+        if (v9fs_proto_dotl(v9ses))
+                return v9fs_inode_dotl(v9ses, fid, sb);
+        else
+                return v9fs_inode(v9ses, fid, sb);
+}
+
 /**
  * v9fs_remove - helper function to remove files and directories
  * @dir: directory inode that is being deleted
@@ -853,6 +891,42 @@ v9fs_vfs_getattr(struct vfsmount *mnt, struct dentry *dentry,
         return 0;
 }
 
+static int
+v9fs_vfs_getattr_dotl(struct vfsmount *mnt, struct dentry *dentry,
+                 struct kstat *stat)
+{
+        int err;
+        struct v9fs_session_info *v9ses;
+        struct p9_fid *fid;
+        struct p9_stat_dotl *st;
+
+        P9_DPRINTK(P9_DEBUG_VFS, "dentry: %p\n", dentry);
+        err = -EPERM;
+        v9ses = v9fs_inode2v9ses(dentry->d_inode);
+        if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
+                return simple_getattr(mnt, dentry, stat);
+
+        fid = v9fs_fid_lookup(dentry);
+        if (IS_ERR(fid))
+                return PTR_ERR(fid);
+
+        /* Ask for all the fields in stat structure. Server will return
+         * whatever it supports
+         */
+
+        st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
+        if (IS_ERR(st))
+                return PTR_ERR(st);
+
+        v9fs_stat2inode_dotl(st, dentry->d_inode);
+        generic_fillattr(dentry->d_inode, stat);
+        /* Change block size to what the server returned */
+        stat->blksize = st->st_blksize;
+
+        kfree(st);
+        return 0;
+}
+
 /**
  * v9fs_vfs_setattr - set file metadata
  * @dentry: file whose metadata to set
@@ -980,6 +1054,77 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
 }
 
 /**
+ * v9fs_stat2inode_dotl - populate an inode structure with stat info
+ * @stat: stat structure
+ * @inode: inode to populate
+ * @sb: superblock of filesystem
+ *
+ */
+
+void
+v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
+{
+
+        if ((stat->st_result_mask & P9_STATS_BASIC) == P9_STATS_BASIC) {
+                inode->i_atime.tv_sec = stat->st_atime_sec;
+                inode->i_atime.tv_nsec = stat->st_atime_nsec;
+                inode->i_mtime.tv_sec = stat->st_mtime_sec;
+                inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
+                inode->i_ctime.tv_sec = stat->st_ctime_sec;
+                inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
+                inode->i_uid = stat->st_uid;
+                inode->i_gid = stat->st_gid;
+                inode->i_nlink = stat->st_nlink;
+                inode->i_mode = stat->st_mode;
+                inode->i_rdev = new_decode_dev(stat->st_rdev);
+
+                if ((S_ISBLK(inode->i_mode)) || (S_ISCHR(inode->i_mode)))
+                        init_special_inode(inode, inode->i_mode, inode->i_rdev);
+
+                i_size_write(inode, stat->st_size);
+                inode->i_blocks = stat->st_blocks;
+        } else {
+                if (stat->st_result_mask & P9_STATS_ATIME) {
+                        inode->i_atime.tv_sec = stat->st_atime_sec;
+                        inode->i_atime.tv_nsec = stat->st_atime_nsec;
+                }
+                if (stat->st_result_mask & P9_STATS_MTIME) {
+                        inode->i_mtime.tv_sec = stat->st_mtime_sec;
+                        inode->i_mtime.tv_nsec = stat->st_mtime_nsec;
+                }
+                if (stat->st_result_mask & P9_STATS_CTIME) {
+                        inode->i_ctime.tv_sec = stat->st_ctime_sec;
+                        inode->i_ctime.tv_nsec = stat->st_ctime_nsec;
+                }
+                if (stat->st_result_mask & P9_STATS_UID)
+                        inode->i_uid = stat->st_uid;
+                if (stat->st_result_mask & P9_STATS_GID)
+                        inode->i_gid = stat->st_gid;
+                if (stat->st_result_mask & P9_STATS_NLINK)
+                        inode->i_nlink = stat->st_nlink;
+                if (stat->st_result_mask & P9_STATS_MODE) {
+                        inode->i_mode = stat->st_mode;
+                        if ((S_ISBLK(inode->i_mode)) ||
+                                                (S_ISCHR(inode->i_mode)))
+                                init_special_inode(inode, inode->i_mode,
+                                                                inode->i_rdev);
+                }
+                if (stat->st_result_mask & P9_STATS_RDEV)
+                        inode->i_rdev = new_decode_dev(stat->st_rdev);
+                if (stat->st_result_mask & P9_STATS_SIZE)
+                        i_size_write(inode, stat->st_size);
+                if (stat->st_result_mask & P9_STATS_BLOCKS)
+                        inode->i_blocks = stat->st_blocks;
+        }
+        if (stat->st_result_mask & P9_STATS_GEN)
+                        inode->i_generation = stat->st_gen;
+
+        /* Currently we don't support P9_STATS_BTIME and P9_STATS_DATA_VERSION
+         * because the inode structure does not have fields for them.
+         */
+}
+
+/**
  * v9fs_qid2ino - convert qid into inode number
  * @qid: qid to hash
  *
@@ -1254,7 +1399,7 @@ static const struct inode_operations v9fs_dir_inode_operations_dotl = {
         .rmdir = v9fs_vfs_rmdir,
         .mknod = v9fs_vfs_mknod,
         .rename = v9fs_vfs_rename,
-        .getattr = v9fs_vfs_getattr,
+        .getattr = v9fs_vfs_getattr_dotl,
         .setattr = v9fs_vfs_setattr,
 };
 
@@ -1276,7 +1421,7 @@ static const struct inode_operations v9fs_file_inode_operations = {
 };
 
 static const struct inode_operations v9fs_file_inode_operations_dotl = {
-        .getattr = v9fs_vfs_getattr,
+        .getattr = v9fs_vfs_getattr_dotl,
         .setattr = v9fs_vfs_setattr,
 };
 
@@ -1292,6 +1437,6 @@ static const struct inode_operations v9fs_symlink_inode_operations_dotl = {
         .readlink = generic_readlink,
         .follow_link = v9fs_vfs_follow_link,
         .put_link = v9fs_vfs_put_link,
-        .getattr = v9fs_vfs_getattr,
+        .getattr = v9fs_vfs_getattr_dotl,
         .setattr = v9fs_vfs_setattr,
 };
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index be74d020436e..3623f692b448 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -107,7 +107,6 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
         struct inode *inode = NULL;
         struct dentry *root = NULL;
         struct v9fs_session_info *v9ses = NULL;
-        struct p9_wstat *st = NULL;
         int mode = S_IRWXUGO | S_ISVTX;
         struct p9_fid *fid;
         int retval = 0;
@@ -124,16 +123,10 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
                 goto close_session;
         }
 
-        st = p9_client_stat(fid);
-        if (IS_ERR(st)) {
-                retval = PTR_ERR(st);
-                goto clunk_fid;
-        }
-
         sb = sget(fs_type, NULL, v9fs_set_super, v9ses);
         if (IS_ERR(sb)) {
                 retval = PTR_ERR(sb);
-                goto free_stat;
+                goto clunk_fid;
         }
         v9fs_fill_super(sb, v9ses, flags, data);
 
@@ -151,22 +144,38 @@ static int v9fs_get_sb(struct file_system_type *fs_type, int flags,
         }
 
         sb->s_root = root;
-        root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
 
-        v9fs_stat2inode(st, root->d_inode, sb);
+        if (v9fs_proto_dotl(v9ses)) {
+                struct p9_stat_dotl *st = NULL;
+                st = p9_client_getattr_dotl(fid, P9_STATS_BASIC);
+                if (IS_ERR(st)) {
+                        retval = PTR_ERR(st);
+                        goto clunk_fid;
+                }
+
+                v9fs_stat2inode_dotl(st, root->d_inode);
+                kfree(st);
+        } else {
+                struct p9_wstat *st = NULL;
+                st = p9_client_stat(fid);
+                if (IS_ERR(st)) {
+                        retval = PTR_ERR(st);
+                        goto clunk_fid;
+                }
+
+                root->d_inode->i_ino = v9fs_qid2ino(&st->qid);
+                v9fs_stat2inode(st, root->d_inode, sb);
+
+                p9stat_free(st);
+                kfree(st);
+        }
 
         v9fs_fid_add(root, fid);
-        p9stat_free(st);
-        kfree(st);
 
 P9_DPRINTK(P9_DEBUG_VFS, " simple set mount, return 0\n");
         simple_set_mnt(mnt, sb);
         return 0;
 
-free_stat:
-        p9stat_free(st);
-        kfree(st);
-
 clunk_fid:
         p9_client_clunk(fid);
 
@@ -176,8 +185,6 @@ close_session:
         return retval;
 
 release_sb:
-        p9stat_free(st);
-        kfree(st);
         deactivate_locked_super(sb);
         return retval;
 }