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Reorganised sys_open.

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vfs_create and mknod now returns the newly created vnode.
(which might be used by upper layers).
This commit is contained in:
Bahadir Balban
2008-04-19 00:40:48 +01:00
parent f7163b7e93
commit 8c4c436925
5 changed files with 77 additions and 33 deletions
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17
tasks/fs0/src/memfs/vnode.c
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@@ -208,9 +208,10 @@ int memfs_write_vnode(struct superblock *sb, struct vnode *v)
/*
* Creates ordinary files and directories at the moment. In the future,
* other file types will be added.
* other file types will be added. Returns the created node.
*/
int memfs_vnode_mknod(struct vnode *v, const char *dirname, unsigned int mode)
struct vnode *memfs_vnode_mknod(struct vnode *v, const char *dirname,
unsigned int mode)
{
struct dentry *d, *parent = list_entry(v->dentries.next,
struct dentry, vref);
@@ -230,25 +231,25 @@ int memfs_vnode_mknod(struct vnode *v, const char *dirname, unsigned int mode)
/* Populate the children */
if ((err = v->ops.readdir(v)) < 0)
return err;
return PTR_ERR(err);
/* Check there's no existing child with same name */
list_for_each_entry(d, &parent->children, child) {
/* Does the name exist as a child? */
if(d->ops.compare(d, dirname))
return -EEXIST;
return PTR_ERR(-EEXIST);
}
/* Allocate a new vnode for the new directory */
if (IS_ERR(newv = v->sb->ops->alloc_vnode(v->sb)))
return (int)newv;
return newv;
/* Initialise the vnode */
vfs_set_type(newv, S_IFDIR);
/* Get the next directory entry available on the parent vnode */
if (v->dirbuf.npages * PAGE_SIZE <= v->size)
return -ENOSPC;
return PTR_ERR(-ENOSPC);
/* Fill in the new entry to parent directory entry */
memfsd = (struct memfs_dentry *)&v->dirbuf.buffer[v->size];
@@ -267,7 +268,7 @@ int memfs_vnode_mknod(struct vnode *v, const char *dirname, unsigned int mode)
/* Allocate a new vfs dentry */
if (!(newd = vfs_alloc_dentry()))
return -ENOMEM;
return PTR_ERR(-ENOMEM);
/* Initialise it */
newd->ops = generic_dentry_operations;
@@ -285,7 +286,7 @@ int memfs_vnode_mknod(struct vnode *v, const char *dirname, unsigned int mode)
list_add(&newd->cache_list, &dentry_cache);
list_add(&newv->cache_list, &vnode_cache);
return 0;
return newv;
}
/*