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authorTiger Yang <tiger.yang@oracle.com>2006-11-27 09:59:21 +0800
committerMark Fasheh <mark.fasheh@oracle.com>2006-12-01 18:29:14 -0800
commitd38eb8db6aa359c060dfb72a29cf8d94a96657d8 (patch)
tree3d27b15ae8fc1718030147a2ed08812c902a7b2e
parent58d206c2fa5cc0b35bf3ca48324d7633aa7d0412 (diff)
ocfs2: implement i_op->permission
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>
-rw-r--r--fs/ocfs2/file.c24
-rw-r--r--fs/ocfs2/file.h2
-rw-r--r--fs/ocfs2/namei.c1
3 files changed, 27 insertions, 0 deletions
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index b64ef7c6e2d..8786b3c490a 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -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 = {
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 475ed8aee8b..601a453f18a 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -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,
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index 583bffe9809..21db45ddf14 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -2311,4 +2311,5 @@ struct inode_operations ocfs2_dir_iops = {
.rename = ocfs2_rename,
.setattr = ocfs2_setattr,
.getattr = ocfs2_getattr,
+ .permission = ocfs2_permission,
};