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[readdir] introduce iterate_dir() and dir_context

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iterate_dir(): new helper, replacing vfs_readdir().

struct dir_context: contains the readdir callback (and will get more stuff
in it), embedded into whatever data that callback wants to deal with;
eventually, we'll be passing it to ->readdir() replacement instead of
(data,filldir) pair.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2013-05-15 13:52:59 -04:00
parent 83a8761142
commit 5c0ba4e076
10 changed files with 53 additions and 20 deletions
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4
include/linux/fs.h
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@@ -1506,6 +1506,9 @@ int fiemap_check_flags(struct fiemap_extent_info *fieinfo, u32 fs_flags);
* to have different dirent layouts depending on the binary type.
*/
typedef int (*filldir_t)(void *, const char *, int, loff_t, u64, unsigned);
struct dir_context {
filldir_t actor;
};
struct block_device_operations;
/* These macros are for out of kernel modules to test that
@@ -2494,6 +2497,7 @@ loff_t inode_get_bytes(struct inode *inode);
void inode_set_bytes(struct inode *inode, loff_t bytes);
extern int vfs_readdir(struct file *, filldir_t, void *);
extern int iterate_dir(struct file *, struct dir_context *);
extern int vfs_stat(const char __user *, struct kstat *);
extern int vfs_lstat(const char __user *, struct kstat *);