proc: protect mm start_code/end_code in /proc/pid/stat

[firefly-linux-kernel-4.4.55.git] / fs / 9p / v9fs.h

diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index c4b5d8864f0ddb66ee33dadec6311e42e1408663..9665c2b840e6442a11b550f59da6ddf0ed73f256 100644 (file)
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -20,6 +20,9 @@
  *  Boston, MA  02111-1301  USA
  *
  */
+#ifndef FS_9P_V9FS_H
+#define FS_9P_V9FS_H
+
 #include <linux/backing-dev.h>
 
 /**
@@ -28,8 +31,10 @@
  * @V9FS_PROTO_2000L: whether or not to use 9P2000.l extensions
  * @V9FS_ACCESS_SINGLE: only the mounting user can access the hierarchy
  * @V9FS_ACCESS_USER: a new attach will be issued for every user (default)
+ * @V9FS_ACCESS_CLIENT: Just like user, but access check is performed on client.
  * @V9FS_ACCESS_ANY: use a single attach for all users
  * @V9FS_ACCESS_MASK: bit mask of different ACCESS options
+ * @V9FS_POSIX_ACL: POSIX ACLs are enforced
  *
  * Session flags reflect options selected by users at mount time
  */
@@ -37,13 +42,15 @@
                         V9FS_ACCESS_USER |   \
                         V9FS_ACCESS_CLIENT)
 #define V9FS_ACCESS_MASK V9FS_ACCESS_ANY
+#define V9FS_ACL_MASK V9FS_POSIX_ACL
 
 enum p9_session_flags {
        V9FS_PROTO_2000U        = 0x01,
        V9FS_PROTO_2000L        = 0x02,
        V9FS_ACCESS_SINGLE      = 0x04,
        V9FS_ACCESS_USER        = 0x08,
-       V9FS_ACCESS_CLIENT      = 0x10
+       V9FS_ACCESS_CLIENT      = 0x10,
+       V9FS_POSIX_ACL          = 0x20
 };
 
 /* possible values of ->cache */
@@ -109,8 +116,29 @@ struct v9fs_session_info {
        struct list_head slist; /* list of sessions registered with v9fs */
        struct backing_dev_info bdi;
        struct rw_semaphore rename_sem;
+       struct p9_fid *root_fid; /* Used for file system sync */
+};
+
+/* cache_validity flags */
+#define V9FS_INO_INVALID_ATTR 0x01
+
+struct v9fs_inode {
+#ifdef CONFIG_9P_FSCACHE
+       spinlock_t fscache_lock;
+       struct fscache_cookie *fscache;
+       struct p9_qid *fscache_key;
+#endif
+       unsigned int cache_validity;
+       struct p9_fid *writeback_fid;
+       struct mutex v_mutex;
+       struct inode vfs_inode;
 };
 
+static inline struct v9fs_inode *V9FS_I(const struct inode *inode)
+{
+       return container_of(inode, struct v9fs_inode, vfs_inode);
+}
+
 struct p9_fid *v9fs_session_init(struct v9fs_session_info *, const char *,
                                                                        char *);
 extern void v9fs_session_close(struct v9fs_session_info *v9ses);
@@ -124,16 +152,15 @@ extern int v9fs_vfs_rename(struct inode *old_dir, struct dentry *old_dentry,
                        struct inode *new_dir, struct dentry *new_dentry);
 extern void v9fs_vfs_put_link(struct dentry *dentry, struct nameidata *nd,
                        void *p);
-extern struct inode *v9fs_inode(struct v9fs_session_info *v9ses,
-                       struct p9_fid *fid,
-                       struct super_block *sb);
-
+extern struct inode *v9fs_inode_from_fid(struct v9fs_session_info *v9ses,
+                                        struct p9_fid *fid,
+                                        struct super_block *sb);
 extern const struct inode_operations v9fs_dir_inode_operations_dotl;
 extern const struct inode_operations v9fs_file_inode_operations_dotl;
 extern const struct inode_operations v9fs_symlink_inode_operations_dotl;
-extern struct inode *v9fs_inode_dotl(struct v9fs_session_info *v9ses,
-                       struct p9_fid *fid,
-                       struct super_block *sb);
+extern struct inode *v9fs_inode_from_fid_dotl(struct v9fs_session_info *v9ses,
+                                             struct p9_fid *fid,
+                                             struct super_block *sb);
 
 /* other default globals */
 #define V9FS_PORT      564
@@ -147,6 +174,11 @@ static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
        return (inode->i_sb->s_fs_info);
 }
 
+static inline struct v9fs_session_info *v9fs_dentry2v9ses(struct dentry *dentry)
+{
+       return dentry->d_sb->s_fs_info;
+}
+
 static inline int v9fs_proto_dotu(struct v9fs_session_info *v9ses)
 {
        return v9ses->flags & V9FS_PROTO_2000U;
@@ -158,7 +190,7 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
 }
 
 /**
- * v9fs_inode_from_fid - Helper routine to populate an inode by
+ * v9fs_get_inode_from_fid - Helper routine to populate an inode by
  * issuing a attribute request
  * @v9ses: session information
  * @fid: fid to issue attribute request for
@@ -166,11 +198,12 @@ static inline int v9fs_proto_dotl(struct v9fs_session_info *v9ses)
  *
  */
 static inline struct inode *
-v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
-                               struct super_block *sb)
+v9fs_get_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);
+               return v9fs_inode_from_fid_dotl(v9ses, fid, sb);
        else
-               return v9fs_inode(v9ses, fid, sb);
+               return v9fs_inode_from_fid(v9ses, fid, sb);
 }
+#endif