Merge branch 'for-2.6.39/core' of git://git.kernel.dk/linux-2.6-block

[pandora-kernel.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index b95199d..ce7e185 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -102,6 +102,9 @@ struct inodes_stat_t {
 /* File is huge (eg. /dev/kmem): treat loff_t as unsigned */
 #define FMODE_UNSIGNED_OFFSET  ((__force fmode_t)0x2000)
 
+/* File is opened with O_PATH; almost nothing can be done with it */
+#define FMODE_PATH             ((__force fmode_t)0x4000)
+
 /* File was opened by fanotify and shouldn't generate fanotify events */
 #define FMODE_NONOTIFY         ((__force fmode_t)0x1000000)
 
@@ -648,9 +651,9 @@ struct address_space {
 
 struct block_device {
        dev_t                   bd_dev;  /* not a kdev_t - it's a search key */
+       int                     bd_openers;
        struct inode *          bd_inode;       /* will die */
        struct super_block *    bd_super;
-       int                     bd_openers;
        struct mutex            bd_mutex;       /* open/close mutex */
        struct list_head        bd_inodes;
        void *                  bd_claiming;
@@ -787,8 +790,7 @@ struct inode {
 #endif
 
 #ifdef CONFIG_IMA
-       /* protected by i_lock */
-       unsigned int            i_readcount; /* struct files open RO */
+       atomic_t                i_readcount; /* struct files open RO */
 #endif
        atomic_t                i_writecount;
 #ifdef CONFIG_SECURITY
@@ -967,6 +969,13 @@ struct file {
 #endif
 };
 
+struct file_handle {
+       __u32 handle_bytes;
+       int handle_type;
+       /* file identifier */
+       unsigned char f_handle[0];
+};
+
 #define get_file(x)    atomic_long_inc(&(x)->f_count)
 #define fput_atomic(x) atomic_long_add_unless(&(x)->f_count, -1, 1)
 #define file_count(x)  atomic_long_read(&(x)->f_count)
@@ -1390,6 +1399,7 @@ struct super_block {
        wait_queue_head_t       s_wait_unfrozen;
 
        char s_id[32];                          /* Informational name */
+       u8 s_uuid[16];                          /* UUID */
 
        void                    *s_fs_info;     /* Filesystem private info */
        fmode_t                 s_mode;
@@ -1436,8 +1446,13 @@ enum {
 #define put_fs_excl() atomic_dec(&current->fs_excl)
 #define has_fs_excl() atomic_read(&current->fs_excl)
 
-#define is_owner_or_cap(inode) \
-       ((current_fsuid() == (inode)->i_uid) || capable(CAP_FOWNER))
+/*
+ * until VFS tracks user namespaces for inodes, just make all files
+ * belong to init_user_ns
+ */
+extern struct user_namespace init_user_ns;
+#define inode_userns(inode) (&init_user_ns)
+extern bool inode_owner_or_capable(const struct inode *inode);
 
 /* not quite ready to be deprecated, but... */
 extern void lock_super(struct super_block *);
@@ -1610,6 +1625,8 @@ struct super_operations {
        void (*umount_begin) (struct super_block *);
 
        int (*show_options)(struct seq_file *, struct vfsmount *);
+       int (*show_devname)(struct seq_file *, struct vfsmount *);
+       int (*show_path)(struct seq_file *, struct vfsmount *);
        int (*show_stats)(struct seq_file *, struct vfsmount *);
 #ifdef CONFIG_QUOTA
        ssize_t (*quota_read)(struct super_block *, int, char *, size_t, loff_t);
@@ -1773,8 +1790,6 @@ int sync_inode_metadata(struct inode *inode, int wait);
 struct file_system_type {
        const char *name;
        int fs_flags;
-       int (*get_sb) (struct file_system_type *, int,
-                      const char *, void *, struct vfsmount *);
        struct dentry *(*mount) (struct file_system_type *, int,
                       const char *, void *);
        void (*kill_sb) (struct super_block *);
@@ -1797,24 +1812,12 @@ extern struct dentry *mount_ns(struct file_system_type *fs_type, int flags,
 extern struct dentry *mount_bdev(struct file_system_type *fs_type,
        int flags, const char *dev_name, void *data,
        int (*fill_super)(struct super_block *, void *, int));
-extern int get_sb_bdev(struct file_system_type *fs_type,
-       int flags, const char *dev_name, void *data,
-       int (*fill_super)(struct super_block *, void *, int),
-       struct vfsmount *mnt);
 extern struct dentry *mount_single(struct file_system_type *fs_type,
        int flags, void *data,
        int (*fill_super)(struct super_block *, void *, int));
-extern int get_sb_single(struct file_system_type *fs_type,
-       int flags, void *data,
-       int (*fill_super)(struct super_block *, void *, int),
-       struct vfsmount *mnt);
 extern struct dentry *mount_nodev(struct file_system_type *fs_type,
        int flags, void *data,
        int (*fill_super)(struct super_block *, void *, int));
-extern int get_sb_nodev(struct file_system_type *fs_type,
-       int flags, void *data,
-       int (*fill_super)(struct super_block *, void *, int),
-       struct vfsmount *mnt);
 void generic_shutdown_super(struct super_block *sb);
 void kill_block_super(struct super_block *sb);
 void kill_anon_super(struct super_block *sb);
@@ -1830,7 +1833,6 @@ extern struct dentry *mount_pseudo(struct file_system_type *, char *,
        const struct super_operations *ops,
        const struct dentry_operations *dops,
        unsigned long);
-extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
 
 static inline void sb_mark_dirty(struct super_block *sb)
 {
@@ -1863,6 +1865,8 @@ extern void drop_collected_mounts(struct vfsmount *);
 extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
                          struct vfsmount *);
 extern int vfs_statfs(struct path *, struct kstatfs *);
+extern int user_statfs(const char __user *, struct kstatfs *);
+extern int fd_statfs(int, struct kstatfs *);
 extern int statfs_by_dentry(struct dentry *, struct kstatfs *);
 extern int freeze_super(struct super_block *super);
 extern int thaw_super(struct super_block *super);
@@ -1979,6 +1983,8 @@ extern int do_fallocate(struct file *file, int mode, loff_t offset,
 extern long do_sys_open(int dfd, const char __user *filename, int flags,
                        int mode);
 extern struct file *filp_open(const char *, int, int);
+extern struct file *file_open_root(struct dentry *, struct vfsmount *,
+                                  const char *, int);
 extern struct file * dentry_open(struct dentry *, struct vfsmount *, int,
                                 const struct cred *);
 extern int filp_close(struct file *, fl_owner_t id);
@@ -2189,15 +2195,31 @@ static inline void allow_write_access(struct file *file)
        if (file)
                atomic_inc(&file->f_path.dentry->d_inode->i_writecount);
 }
+#ifdef CONFIG_IMA
+static inline void i_readcount_dec(struct inode *inode)
+{
+       BUG_ON(!atomic_read(&inode->i_readcount));
+       atomic_dec(&inode->i_readcount);
+}
+static inline void i_readcount_inc(struct inode *inode)
+{
+       atomic_inc(&inode->i_readcount);
+}
+#else
+static inline void i_readcount_dec(struct inode *inode)
+{
+       return;
+}
+static inline void i_readcount_inc(struct inode *inode)
+{
+       return;
+}
+#endif
 extern int do_pipe_flags(int *, int);
 extern struct file *create_read_pipe(struct file *f, int flags);
 extern struct file *create_write_pipe(int flags);
 extern void free_write_pipe(struct file *);
 
-extern struct file *do_filp_open(int dfd, const char *pathname,
-               int open_flag, int mode, int acc_mode);
-extern int may_open(struct path *, int, int);
-
 extern int kernel_read(struct file *, loff_t, char *, unsigned long);
 extern struct file * open_exec(const char *);