Fix sget() race with failing mount

[linux-2.6-block.git] / include / linux / fs.h

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 3428393942a642f877dc065d86c05044305af399..58e4b035e2825ee8b65e14cd1d797cf7a6d1037d 100644 (file)
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -209,6 +209,7 @@ struct inodes_stat_t {
 #define MS_KERNMOUNT   (1<<22) /* this is a kern_mount call */
 #define MS_I_VERSION   (1<<23) /* Update inode I_version field */
 #define MS_STRICTATIME (1<<24) /* Always perform atime updates */
+#define MS_BORN                (1<<29)
 #define MS_ACTIVE      (1<<30)
 #define MS_NOUSER      (1<<31)
 
@@ -415,7 +416,8 @@ struct buffer_head;
 typedef int (get_block_t)(struct inode *inode, sector_t iblock,
                        struct buffer_head *bh_result, int create);
 typedef void (dio_iodone_t)(struct kiocb *iocb, loff_t offset,
-                       ssize_t bytes, void *private);
+                       ssize_t bytes, void *private, int ret,
+                       bool is_async);
 
 /*
  * Attribute flags.  These should be or-ed together to figure out what
@@ -1561,8 +1563,8 @@ struct super_operations {
 
        void (*dirty_inode) (struct inode *);
        int (*write_inode) (struct inode *, struct writeback_control *wbc);
-       void (*drop_inode) (struct inode *);
-       void (*delete_inode) (struct inode *);
+       int (*drop_inode) (struct inode *);
+       void (*evict_inode) (struct inode *);
        void (*put_super) (struct super_block *);
        void (*write_super) (struct super_block *);
        int (*sync_fs)(struct super_block *sb, int wait);
@@ -1570,7 +1572,6 @@ struct super_operations {
        int (*unfreeze_fs) (struct super_block *);
        int (*statfs) (struct dentry *, struct kstatfs *);
        int (*remount_fs) (struct super_block *, int *, char *);
-       void (*clear_inode) (struct inode *);
        void (*umount_begin) (struct super_block *);
 
        int (*show_options)(struct seq_file *, struct vfsmount *);
@@ -1615,8 +1616,8 @@ struct super_operations {
  * I_FREEING           Set when inode is about to be freed but still has dirty
  *                     pages or buffers attached or the inode itself is still
  *                     dirty.
- * I_CLEAR             Set by clear_inode().  In this state the inode is clean
- *                     and can be destroyed.
+ * I_CLEAR             Added by end_writeback().  In this state the inode is clean
+ *                     and can be destroyed.  Inode keeps I_FREEING.
  *
  *                     Inodes that are I_WILL_FREE, I_FREEING or I_CLEAR are
  *                     prohibited for many purposes.  iget() must wait for
@@ -1783,6 +1784,19 @@ extern int get_sb_pseudo(struct file_system_type *, char *,
        struct vfsmount *mnt);
 extern void simple_set_mnt(struct vfsmount *mnt, struct super_block *sb);
 
+static inline void sb_mark_dirty(struct super_block *sb)
+{
+       sb->s_dirt = 1;
+}
+static inline void sb_mark_clean(struct super_block *sb)
+{
+       sb->s_dirt = 0;
+}
+static inline int sb_is_dirty(struct super_block *sb)
+{
+       return sb->s_dirt;
+}
+
 /* Alas, no aliases. Too much hassle with bringing module.h everywhere */
 #define fops_get(fops) \
        (((fops) && try_module_get((fops)->owner) ? (fops) : NULL))
@@ -1800,7 +1814,8 @@ extern struct vfsmount *collect_mounts(struct path *);
 extern void drop_collected_mounts(struct vfsmount *);
 extern int iterate_mounts(int (*)(struct vfsmount *, void *), void *,
                          struct vfsmount *);
-extern int vfs_statfs(struct dentry *, struct kstatfs *);
+extern int vfs_statfs(struct path *, 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);
 
@@ -2150,9 +2165,8 @@ extern void iput(struct inode *);
 extern struct inode * igrab(struct inode *);
 extern ino_t iunique(struct super_block *, ino_t);
 extern int inode_needs_sync(struct inode *inode);
-extern void generic_delete_inode(struct inode *inode);
-extern void generic_drop_inode(struct inode *inode);
-extern int generic_detach_inode(struct inode *inode);
+extern int generic_delete_inode(struct inode *inode);
+extern int generic_drop_inode(struct inode *inode);
 
 extern struct inode *ilookup5_nowait(struct super_block *sb,
                unsigned long hashval, int (*test)(struct inode *, void *),
@@ -2169,7 +2183,7 @@ extern void unlock_new_inode(struct inode *);
 
 extern void __iget(struct inode * inode);
 extern void iget_failed(struct inode *);
-extern void clear_inode(struct inode *);
+extern void end_writeback(struct inode *);
 extern void destroy_inode(struct inode *);
 extern void __destroy_inode(struct inode *);
 extern struct inode *new_inode(struct super_block *);
@@ -2255,16 +2269,6 @@ static inline int xip_truncate_page(struct address_space *mapping, loff_t from)
 struct bio;
 typedef void (dio_submit_t)(int rw, struct bio *bio, struct inode *inode,
                            loff_t file_offset);
-void dio_end_io(struct bio *bio, int error);
-
-ssize_t __blockdev_direct_IO_newtrunc(int rw, struct kiocb *iocb, struct inode *inode,
-       struct block_device *bdev, const struct iovec *iov, loff_t offset,
-       unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
-       dio_submit_t submit_io, int lock_type);
-ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
-       struct block_device *bdev, const struct iovec *iov, loff_t offset,
-       unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
-       dio_submit_t submit_io, int lock_type);
 
 enum {
        /* need locking between buffered and direct access */
@@ -2274,24 +2278,13 @@ enum {
        DIO_SKIP_HOLES  = 0x02,
 };
 
-static inline ssize_t blockdev_direct_IO_newtrunc(int rw, struct kiocb *iocb,
-       struct inode *inode, struct block_device *bdev, const struct iovec *iov,
-       loff_t offset, unsigned long nr_segs, get_block_t get_block,
-       dio_iodone_t end_io)
-{
-       return __blockdev_direct_IO_newtrunc(rw, iocb, inode, bdev, iov, offset,
-                                   nr_segs, get_block, end_io, NULL,
-                                   DIO_LOCKING | DIO_SKIP_HOLES);
-}
+void dio_end_io(struct bio *bio, int error);
+
+ssize_t __blockdev_direct_IO(int rw, struct kiocb *iocb, struct inode *inode,
+       struct block_device *bdev, const struct iovec *iov, loff_t offset,
+       unsigned long nr_segs, get_block_t get_block, dio_iodone_t end_io,
+       dio_submit_t submit_io, int flags);
 
-static inline ssize_t blockdev_direct_IO_no_locking_newtrunc(int rw, struct kiocb *iocb,
-       struct inode *inode, struct block_device *bdev, const struct iovec *iov,
-       loff_t offset, unsigned long nr_segs, get_block_t get_block,
-       dio_iodone_t end_io)
-{
-       return __blockdev_direct_IO_newtrunc(rw, iocb, inode, bdev, iov, offset,
-                               nr_segs, get_block, end_io, NULL, 0);
-}
 static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
        struct inode *inode, struct block_device *bdev, const struct iovec *iov,
        loff_t offset, unsigned long nr_segs, get_block_t get_block,
@@ -2301,15 +2294,6 @@ static inline ssize_t blockdev_direct_IO(int rw, struct kiocb *iocb,
                                    nr_segs, get_block, end_io, NULL,
                                    DIO_LOCKING | DIO_SKIP_HOLES);
 }
-
-static inline ssize_t blockdev_direct_IO_no_locking(int rw, struct kiocb *iocb,
-       struct inode *inode, struct block_device *bdev, const struct iovec *iov,
-       loff_t offset, unsigned long nr_segs, get_block_t get_block,
-       dio_iodone_t end_io)
-{
-       return __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset,
-                                   nr_segs, get_block, end_io, NULL, 0);
-}
 #endif
 
 extern const struct file_operations generic_ro_fops;
@@ -2371,7 +2355,6 @@ extern int simple_link(struct dentry *, struct inode *, struct dentry *);
 extern int simple_unlink(struct inode *, struct dentry *);
 extern int simple_rmdir(struct inode *, struct dentry *);
 extern int simple_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
-extern int simple_setsize(struct inode *, loff_t);
 extern int noop_fsync(struct file *, int);
 extern int simple_empty(struct dentry *);
 extern int simple_readpage(struct file *file, struct page *page);
@@ -2388,7 +2371,7 @@ extern const struct file_operations simple_dir_operations;
 extern const struct inode_operations simple_dir_inode_operations;
 struct tree_descr { char *name; const struct file_operations *ops; int mode; };
 struct dentry *d_alloc_name(struct dentry *, const char *);
-extern int simple_fill_super(struct super_block *, int, struct tree_descr *);
+extern int simple_fill_super(struct super_block *, unsigned long, struct tree_descr *);
 extern int simple_pin_fs(struct file_system_type *, struct vfsmount **mount, int *count);
 extern void simple_release_fs(struct vfsmount **mount, int *count);
 
@@ -2408,8 +2391,7 @@ extern int buffer_migrate_page(struct address_space *,
 
 extern int inode_change_ok(const struct inode *, struct iattr *);
 extern int inode_newsize_ok(const struct inode *, loff_t offset);
-extern int __must_check inode_setattr(struct inode *, const struct iattr *);
-extern void generic_setattr(struct inode *inode, const struct iattr *attr);
+extern void setattr_copy(struct inode *inode, const struct iattr *attr);
 
 extern void file_update_time(struct file *file);