exofs: dir_inode and directory operations
implementation of directory and inode operations.
* A directory is treated as a file, and essentially contains a list
of <file name, inode #> pairs for files that are found in that
directory. The object IDs correspond to the files' inode numbers
and are allocated using a 64bit incrementing global counter.
* Each file's control block (AKA on-disk inode) is stored in its
object's attributes. This applies to both regular files and other
types (directories, device files, symlinks, etc.).
Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
index 0276242..d11982c 100644
--- a/fs/exofs/exofs.h
+++ b/fs/exofs/exofs.h
@@ -124,6 +124,11 @@
return container_of(inode, struct exofs_i_info, vfs_inode);
}
+/*
+ * Maximum count of links to a file
+ */
+#define EXOFS_LINK_MAX 32000
+
/*************************
* function declarations *
*************************/
@@ -133,10 +138,27 @@
int exofs_write_begin(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned flags,
struct page **pagep, void **fsdata);
+extern struct inode *exofs_iget(struct super_block *, unsigned long);
+struct inode *exofs_new_inode(struct inode *, int);
+
+/* dir.c: */
+int exofs_add_link(struct dentry *, struct inode *);
+ino_t exofs_inode_by_name(struct inode *, struct dentry *);
+int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
+int exofs_make_empty(struct inode *, struct inode *);
+struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
+ struct page **);
+int exofs_empty_dir(struct inode *);
+struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
+int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
+ struct inode *);
/*********************
* operation vectors *
*********************/
+/* dir.c: */
+extern const struct file_operations exofs_dir_operations;
+
/* file.c */
extern const struct inode_operations exofs_file_inode_operations;
extern const struct file_operations exofs_file_operations;
@@ -144,6 +166,10 @@
/* inode.c */
extern const struct address_space_operations exofs_aops;
+/* namei.c */
+extern const struct inode_operations exofs_dir_inode_operations;
+extern const struct inode_operations exofs_special_inode_operations;
+
/* symlink.c */
extern const struct inode_operations exofs_symlink_inode_operations;
extern const struct inode_operations exofs_fast_symlink_inode_operations;