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ocfs2: implement i_op->permission

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Implement .permission() in ocfs2_file_iops, ocfs2_special_file_iops and
ocfs2_dir_iops.

This helps us avoid some multi-node races with mode change and vfs
operations.

Signed-off-by: Tiger Yang <tiger.yang@oracle.com>
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
This commit is contained in:
Tiger Yang 2006-11-27 09:59:21 +08:00 committed by Mark Fasheh
parent 58d206c2fa
commit d38eb8db6a
3 changed files with 27 additions and 0 deletions
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24
fs/ocfs2/file.c
View file

@ -945,6 +945,28 @@ bail:
return err;
}
int ocfs2_permission(struct inode *inode, int mask, struct nameidata *nd)
{
int ret;
mlog_entry_void();
ret = ocfs2_meta_lock(inode, NULL, 0);
if (ret) {
mlog_errno(ret);
goto out;
}
ret = generic_permission(inode, mask, NULL);
if (ret)
mlog_errno(ret);
ocfs2_meta_unlock(inode, 0);
out:
mlog_exit(ret);
return ret;
}
static int ocfs2_write_remove_suid(struct inode *inode)
{
int ret;
@ -1329,11 +1351,13 @@ bail:
struct inode_operations ocfs2_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
};
struct inode_operations ocfs2_special_file_iops = {
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
};
const struct file_operations ocfs2_fops = {

2
fs/ocfs2/file.h
View file

@ -48,6 +48,8 @@ int ocfs2_do_extend_allocation(struct ocfs2_super *osb,
int ocfs2_setattr(struct dentry *dentry, struct iattr *attr);
int ocfs2_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
int ocfs2_permission(struct inode *inode, int mask,
struct nameidata *nd);
int ocfs2_set_inode_size(handle_t *handle,
struct inode *inode,

1
fs/ocfs2/namei.c
View file

@ -2311,4 +2311,5 @@ struct inode_operations ocfs2_dir_iops = {
.rename = ocfs2_rename,
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
.permission = ocfs2_permission,
};