#include "acl.h"
#include "xip.h"
-/*
- * Couple of helper functions - make the code slightly cleaner.
- */
-
-static inline void ext2_inc_count(struct inode *inode)
-{
- inode->i_nlink++;
- mark_inode_dirty(inode);
-}
-
-static inline void ext2_dec_count(struct inode *inode)
-{
- inode->i_nlink--;
- mark_inode_dirty(inode);
-}
-
static inline int ext2_add_nondir(struct dentry *dentry, struct inode *inode)
{
int err = ext2_add_link(dentry, inode);
if (!err) {
d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
return 0;
}
- ext2_dec_count(inode);
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput(inode);
return err;
}
if (dentry->d_name.len > EXT2_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
- ino = ext2_inode_by_name(dir, dentry);
+ ino = ext2_inode_by_name(dir, &dentry->d_name);
inode = NULL;
if (ino) {
- inode = iget(dir->i_sb, ino);
- if (!inode)
- return ERR_PTR(-EACCES);
+ inode = ext2_iget(dir->i_sb, ino);
+ if (unlikely(IS_ERR(inode))) {
+ if (PTR_ERR(inode) == -ESTALE) {
+ ext2_error(dir->i_sb, __func__,
+ "deleted inode referenced: %lu",
+ (unsigned long) ino);
+ return ERR_PTR(-EIO);
+ } else {
+ return ERR_CAST(inode);
+ }
+ }
}
return d_splice_alias(inode, dentry);
}
struct dentry *ext2_get_parent(struct dentry *child)
{
- unsigned long ino;
- struct dentry *parent;
- struct inode *inode;
- struct dentry dotdot;
-
- dotdot.d_name.name = "..";
- dotdot.d_name.len = 2;
-
- ino = ext2_inode_by_name(child->d_inode, &dotdot);
+ struct qstr dotdot = {.name = "..", .len = 2};
+ unsigned long ino = ext2_inode_by_name(child->d_inode, &dotdot);
if (!ino)
return ERR_PTR(-ENOENT);
- inode = iget(child->d_inode->i_sb, ino);
-
- if (!inode)
- return ERR_PTR(-EACCES);
- parent = d_alloc_anon(inode);
- if (!parent) {
- iput(inode);
- parent = ERR_PTR(-ENOMEM);
- }
- return parent;
+ return d_obtain_alias(ext2_iget(child->d_inode->i_sb, ino));
}
/*
return err;
out_fail:
- ext2_dec_count(inode);
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput (inode);
goto out;
}
struct dentry *dentry)
{
struct inode *inode = old_dentry->d_inode;
+ int err;
if (inode->i_nlink >= EXT2_LINK_MAX)
return -EMLINK;
inode->i_ctime = CURRENT_TIME_SEC;
- ext2_inc_count(inode);
+ inode_inc_link_count(inode);
atomic_inc(&inode->i_count);
- return ext2_add_nondir(dentry, inode);
+ err = ext2_add_link(dentry, inode);
+ if (!err) {
+ d_instantiate(dentry, inode);
+ return 0;
+ }
+ inode_dec_link_count(inode);
+ iput(inode);
+ return err;
}
static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode)
if (dir->i_nlink >= EXT2_LINK_MAX)
goto out;
- ext2_inc_count(dir);
+ inode_inc_link_count(dir);
inode = ext2_new_inode (dir, S_IFDIR | mode);
err = PTR_ERR(inode);
else
inode->i_mapping->a_ops = &ext2_aops;
- ext2_inc_count(inode);
+ inode_inc_link_count(inode);
err = ext2_make_empty(inode, dir);
if (err)
goto out_fail;
d_instantiate(dentry, inode);
+ unlock_new_inode(inode);
out:
return err;
out_fail:
- ext2_dec_count(inode);
- ext2_dec_count(inode);
+ inode_dec_link_count(inode);
+ inode_dec_link_count(inode);
+ unlock_new_inode(inode);
iput(inode);
out_dir:
- ext2_dec_count(dir);
+ inode_dec_link_count(dir);
goto out;
}
struct page * page;
int err = -ENOENT;
- de = ext2_find_entry (dir, dentry, &page);
+ de = ext2_find_entry (dir, &dentry->d_name, &page);
if (!de)
goto out;
goto out;
inode->i_ctime = dir->i_ctime;
- ext2_dec_count(inode);
+ inode_dec_link_count(inode);
err = 0;
out:
return err;
err = ext2_unlink(dir, dentry);
if (!err) {
inode->i_size = 0;
- ext2_dec_count(inode);
- ext2_dec_count(dir);
+ inode_dec_link_count(inode);
+ inode_dec_link_count(dir);
}
}
return err;
struct ext2_dir_entry_2 * old_de;
int err = -ENOENT;
- old_de = ext2_find_entry (old_dir, old_dentry, &old_page);
+ old_de = ext2_find_entry (old_dir, &old_dentry->d_name, &old_page);
if (!old_de)
goto out;
goto out_dir;
err = -ENOENT;
- new_de = ext2_find_entry (new_dir, new_dentry, &new_page);
+ new_de = ext2_find_entry (new_dir, &new_dentry->d_name, &new_page);
if (!new_de)
goto out_dir;
- ext2_inc_count(old_inode);
- ext2_set_link(new_dir, new_de, new_page, old_inode);
+ inode_inc_link_count(old_inode);
+ ext2_set_link(new_dir, new_de, new_page, old_inode, 1);
new_inode->i_ctime = CURRENT_TIME_SEC;
if (dir_de)
- new_inode->i_nlink--;
- ext2_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 >= EXT2_LINK_MAX)
goto out_dir;
}
- ext2_inc_count(old_inode);
+ inode_inc_link_count(old_inode);
err = ext2_add_link(new_dentry, old_inode);
if (err) {
- ext2_dec_count(old_inode);
+ inode_dec_link_count(old_inode);
goto out_dir;
}
if (dir_de)
- ext2_inc_count(new_dir);
+ inode_inc_link_count(new_dir);
}
/*
* Like most other Unix systems, set the ctime for inodes on a
* rename.
- * ext2_dec_count() will mark the inode dirty.
+ * inode_dec_link_count() will mark the inode dirty.
*/
old_inode->i_ctime = CURRENT_TIME_SEC;
ext2_delete_entry (old_de, old_page);
- ext2_dec_count(old_inode);
+ inode_dec_link_count(old_inode);
if (dir_de) {
- ext2_set_link(old_inode, dir_de, dir_page, new_dir);
- ext2_dec_count(old_dir);
+ if (old_dir != new_dir)
+ ext2_set_link(old_inode, dir_de, dir_page, new_dir, 0);
+ else {
+ kunmap(dir_page);
+ page_cache_release(dir_page);
+ }
+ inode_dec_link_count(old_dir);
}
return 0;
return err;
}
-struct inode_operations ext2_dir_inode_operations = {
+const struct inode_operations ext2_dir_inode_operations = {
.create = ext2_create,
.lookup = ext2_lookup,
.link = ext2_link,
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
- .permission = ext2_permission,
+ .check_acl = ext2_check_acl,
};
-struct inode_operations ext2_special_inode_operations = {
+const struct inode_operations ext2_special_inode_operations = {
#ifdef CONFIG_EXT2_FS_XATTR
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.removexattr = generic_removexattr,
#endif
.setattr = ext2_setattr,
- .permission = ext2_permission,
+ .check_acl = ext2_check_acl,
};
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff