/*
* linux/fs/ufs/namei.c
*
+ * Migration to usage of "page cache" on May 2006 by
+ * Evgeniy Dushistov <dushistov@mail.ru> based on ext2 code base.
+ *
* Copyright (C) 1998
* Daniel Pirkl <daniel.pirkl@email.cz>
* Charles University, Faculty of Mathematics and Physics
#include <linux/fs.h>
#include <linux/ufs_fs.h>
#include <linux/smp_lock.h>
-#include <linux/buffer_head.h>
#include "swab.h" /* will go away - see comment in mknod() */
#include "util.h"
-/*
-#undef UFS_NAMEI_DEBUG
-*/
-#define UFS_NAMEI_DEBUG
-
-#ifdef UFS_NAMEI_DEBUG
-#define UFSD(x) printk("(%s, %d), %s: ", __FILE__, __LINE__, __FUNCTION__); printk x;
-#else
-#define UFSD(x)
-#endif
-
-static inline void ufs_inc_count(struct inode *inode)
-{
- inode->i_nlink++;
- mark_inode_dirty(inode);
-}
-
-static inline void ufs_dec_count(struct inode *inode)
-{
- inode->i_nlink--;
- mark_inode_dirty(inode);
-}
-
static inline int ufs_add_nondir(struct dentry *dentry, struct inode *inode)
{
int err = ufs_add_link(dentry, inode);
d_instantiate(dentry, inode);
return 0;
}
- ufs_dec_count(inode);
+ inode_dec_link_count(inode);
iput(inode);
return err;
}
static int ufs_create (struct inode * dir, struct dentry * dentry, int mode,
struct nameidata *nd)
{
- struct inode * inode = ufs_new_inode(dir, mode);
- int err = PTR_ERR(inode);
+ struct inode *inode;
+ int err;
+
+ UFSD("BEGIN\n");
+ inode = ufs_new_inode(dir, mode);
+ err = PTR_ERR(inode);
+
if (!IS_ERR(inode)) {
inode->i_op = &ufs_file_inode_operations;
inode->i_fop = &ufs_file_operations;
err = ufs_add_nondir(dentry, inode);
unlock_kernel();
}
+ UFSD("END: err=%d\n", err);
return err;
}
struct inode * inode;
if (l > sb->s_blocksize)
- goto out;
+ goto out_notlocked;
lock_kernel();
inode = ufs_new_inode(dir, S_IFLNK | S_IRWXUGO);
err = ufs_add_nondir(dentry, inode);
out:
unlock_kernel();
+out_notlocked:
return err;
out_fail:
- ufs_dec_count(inode);
+ inode_dec_link_count(inode);
iput(inode);
goto out;
}
}
inode->i_ctime = CURRENT_TIME_SEC;
- ufs_inc_count(inode);
+ inode_inc_link_count(inode);
atomic_inc(&inode->i_count);
error = ufs_add_nondir(dentry, inode);
goto out;
lock_kernel();
- ufs_inc_count(dir);
+ inode_inc_link_count(dir);
inode = ufs_new_inode(dir, S_IFDIR|mode);
err = PTR_ERR(inode);
inode->i_op = &ufs_dir_inode_operations;
inode->i_fop = &ufs_dir_operations;
+ inode->i_mapping->a_ops = &ufs_aops;
- ufs_inc_count(inode);
+ inode_inc_link_count(inode);
err = ufs_make_empty(inode, dir);
if (err)
return err;
out_fail:
- ufs_dec_count(inode);
- ufs_dec_count(inode);
+ inode_dec_link_count(inode);
+ inode_dec_link_count(inode);
iput (inode);
out_dir:
- ufs_dec_count(dir);
+ inode_dec_link_count(dir);
unlock_kernel();
goto out;
}
-static int ufs_unlink(struct inode * dir, struct dentry *dentry)
+static int ufs_unlink(struct inode *dir, struct dentry *dentry)
{
struct inode * inode = dentry->d_inode;
- struct buffer_head * bh;
- struct ufs_dir_entry * de;
+ struct ufs_dir_entry *de;
+ struct page *page;
int err = -ENOENT;
- lock_kernel();
- de = ufs_find_entry (dentry, &bh);
+ de = ufs_find_entry(dir, dentry, &page);
if (!de)
goto out;
- err = ufs_delete_entry (dir, de, bh);
+ err = ufs_delete_entry(dir, de, page);
if (err)
goto out;
inode->i_ctime = dir->i_ctime;
- ufs_dec_count(inode);
+ inode_dec_link_count(inode);
err = 0;
out:
- unlock_kernel();
return err;
}
err = ufs_unlink(dir, dentry);
if (!err) {
inode->i_size = 0;
- ufs_dec_count(inode);
- ufs_dec_count(dir);
+ inode_dec_link_count(inode);
+ inode_dec_link_count(dir);
}
}
unlock_kernel();
return err;
}
-static int ufs_rename (struct inode * old_dir, struct dentry * old_dentry,
- struct inode * new_dir, struct dentry * new_dentry )
+static int ufs_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
{
struct inode *old_inode = old_dentry->d_inode;
struct inode *new_inode = new_dentry->d_inode;
- struct buffer_head *dir_bh = NULL;
- struct ufs_dir_entry *dir_de = NULL;
- struct buffer_head *old_bh;
+ struct page *dir_page = NULL;
+ struct ufs_dir_entry * dir_de = NULL;
+ struct page *old_page;
struct ufs_dir_entry *old_de;
int err = -ENOENT;
- lock_kernel();
- old_de = ufs_find_entry (old_dentry, &old_bh);
+ old_de = ufs_find_entry(old_dir, old_dentry, &old_page);
if (!old_de)
goto out;
if (S_ISDIR(old_inode->i_mode)) {
err = -EIO;
- dir_de = ufs_dotdot(old_inode, &dir_bh);
+ dir_de = ufs_dotdot(old_inode, &dir_page);
if (!dir_de)
goto out_old;
}
if (new_inode) {
- struct buffer_head *new_bh;
+ struct page *new_page;
struct ufs_dir_entry *new_de;
err = -ENOTEMPTY;
- if (dir_de && !ufs_empty_dir (new_inode))
+ if (dir_de && !ufs_empty_dir(new_inode))
goto out_dir;
+
err = -ENOENT;
- new_de = ufs_find_entry (new_dentry, &new_bh);
+ new_de = ufs_find_entry(new_dir, new_dentry, &new_page);
if (!new_de)
goto out_dir;
- ufs_inc_count(old_inode);
- ufs_set_link(new_dir, new_de, new_bh, old_inode);
+ inode_inc_link_count(old_inode);
+ ufs_set_link(new_dir, new_de, new_page, old_inode);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
- new_inode->i_nlink--;
- ufs_dec_count(new_inode);
+ drop_nlink(new_inode);
+ inode_dec_link_count(new_inode);
} else {
if (dir_de) {
err = -EMLINK;
if (new_dir->i_nlink >= UFS_LINK_MAX)
goto out_dir;
}
- ufs_inc_count(old_inode);
+ inode_inc_link_count(old_inode);
err = ufs_add_link(new_dentry, old_inode);
if (err) {
- ufs_dec_count(old_inode);
+ inode_dec_link_count(old_inode);
goto out_dir;
}
if (dir_de)
- ufs_inc_count(new_dir);
+ inode_inc_link_count(new_dir);
}
- ufs_delete_entry (old_dir, old_de, old_bh);
+ /*
+ * Like most other Unix systems, set the ctime for inodes on a
+ * rename.
+ * inode_dec_link_count() will mark the inode dirty.
+ */
+ old_inode->i_ctime = CURRENT_TIME_SEC;
- ufs_dec_count(old_inode);
+ ufs_delete_entry(old_dir, old_de, old_page);
+ inode_dec_link_count(old_inode);
if (dir_de) {
- ufs_set_link(old_inode, dir_de, dir_bh, new_dir);
- ufs_dec_count(old_dir);
+ ufs_set_link(old_inode, dir_de, dir_page, new_dir);
+ inode_dec_link_count(old_dir);
}
- unlock_kernel();
return 0;
+
out_dir:
- if (dir_de)
- brelse(dir_bh);
+ if (dir_de) {
+ kunmap(dir_page);
+ page_cache_release(dir_page);
+ }
out_old:
- brelse (old_bh);
+ kunmap(old_page);
+ page_cache_release(old_page);
out:
- unlock_kernel();
return err;
}
git://git.onelab.eu / linux-2.6.git / blobdiff