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AFS: implement statfs

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Implement the statfs() op for AFS.

Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
David Howells
2007-05-10 22:22:20 -07:00
committed by Linus Torvalds
parent 0f300ca928
commit 45222b9e02
7 changed files with 426 additions and 15 deletions
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fs/afs/super.c
+36 -5
View File
@@ -21,22 +21,20 @@
#include <linux/fs.h>
#include <linux/pagemap.h>
#include <linux/parser.h>
#include <linux/statfs.h>
#include "internal.h"
#define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
static void afs_i_init_once(void *foo, struct kmem_cache *cachep,
unsigned long flags);
static int afs_get_sb(struct file_system_type *fs_type,
int flags, const char *dev_name,
void *data, struct vfsmount *mnt);
static struct inode *afs_alloc_inode(struct super_block *sb);
static void afs_put_super(struct super_block *sb);
static void afs_destroy_inode(struct inode *inode);
static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
struct file_system_type afs_fs_type = {
.owner = THIS_MODULE,
@@ -47,7 +45,7 @@ struct file_system_type afs_fs_type = {
};
static const struct super_operations afs_super_ops = {
.statfs = simple_statfs,
.statfs = afs_statfs,
.alloc_inode = afs_alloc_inode,
.drop_inode = generic_delete_inode,
.write_inode = afs_write_inode,
@@ -508,3 +506,36 @@ static void afs_destroy_inode(struct inode *inode)
kmem_cache_free(afs_inode_cachep, vnode);
atomic_dec(&afs_count_active_inodes);
}
/*
* return information about an AFS volume
*/
static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct afs_volume_status vs;
struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
struct key *key;
int ret;
key = afs_request_key(vnode->volume->cell);
if (IS_ERR(key))
return PTR_ERR(key);
ret = afs_vnode_get_volume_status(vnode, key, &vs);
key_put(key);
if (ret < 0) {
_leave(" = %d", ret);
return ret;
}
buf->f_type = dentry->d_sb->s_magic;
buf->f_bsize = AFS_BLOCK_SIZE;
buf->f_namelen = AFSNAMEMAX - 1;
if (vs.max_quota == 0)
buf->f_blocks = vs.part_max_blocks;
else
buf->f_blocks = vs.max_quota;
buf->f_bavail = buf->f_bfree = buf->f_blocks - vs.blocks_in_use;
return 0;
}