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sys_readdir and root vnode fixes.

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Changes towards successfully filling dirent structures for sys_readdir
and creating a root vnode for the filesystem.
This commit is contained in:
Bahadir Balban
2008-04-12 17:57:45 +01:00
parent 5e0ec2db85
commit d7b06b5304
9 changed files with 138 additions and 52 deletions
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12
tasks/fs0/include/file.h
View File

@@ -1,18 +1,6 @@
#ifndef __FS0_MM_H__
#define __FS0_MM_H__
/*
* Describes the in-memory representation of a file. This is used to track
* file content, i.e. file pages by mm0, this is a temporary mock up until
* fs0 and mm0 are wired together.
*/
struct vm_file {
unsigned long vnum;
unsigned long length;
/* This is the cache of physical pages that this file has in memory. */
struct list_head page_cache_list;
struct vm_pager *pager;
};
#endif /* __FS0_MM_H__ */

15
tasks/fs0/include/fs.h
View File

@@ -48,6 +48,7 @@ struct vnode_ops {
vnode_op_t create;
struct vnode *(*lookup)(struct vnode *root, char *path);
int (*readdir)(struct vnode *v);
int (*filldir)(struct vnode *v);
vnode_op_t link;
vnode_op_t unlink;
int (*mkdir)(struct vnode *parent, char *name);
@@ -91,8 +92,9 @@ struct dentry {
};
/*
* Buffer to keep directory content. This is the only vnode content
* that fs0 maintains. All other file data is in mm0 page cache.
* Buffer that maintains directory content for a directory vnode. This is the
* only vnode content that fs0 maintains. All other file data is in mm0 page
* cache.
*/
struct dirbuf {
unsigned long npages;
@@ -100,6 +102,15 @@ struct dirbuf {
u8 *buffer;
};
/* Posix-style dirent format used by userspace. Returned by sys_readdir() */
#define DIRENT_NAME_MAX 32
struct dirent {
u32 inum; /* Inode number */
u32 offset; /* Dentry offset in its buffer */
u32 rlength; /* Record length */
u8 name[DIRENT_NAME_MAX]; /* Name string */
};
struct vnode {
unsigned long vnum; /* Filesystem-wide unique vnode id */
int refcnt; /* Reference counter */

3
tasks/fs0/include/memfs/memfs.h
View File

@@ -47,6 +47,7 @@
#define MEMFS_MAGIC 0xB
#define MEMFS_NAME "memfs"
#define MEMFS_NAME_SIZE 8
struct memfs_inode {
u32 inum; /* Inode number */
u32 mode; /* File permissions */
@@ -64,7 +65,7 @@ struct memfs_superblock {
u32 blocksize; /* Filesystem block size */
u64 fmaxblocks; /* Maximum number of blocks per file */
u64 fssize; /* Total size of filesystem */
struct memfs_inode *root; /* The root of this superblock */
unsigned long root_vnum; /* The root vnum of this superblock */
struct list_head inode_cache_list; /* Chain of alloc caches */
struct list_head block_cache_list; /* Chain of alloc caches */
struct id_pool *ipool; /* Index pool for inodes */