LU-12056 ldiskfs: add trusted.projid virtual xattr

[fs/lustre-release.git] / lustre / llite / xattr.c

diff --git a/lustre/llite/xattr.c b/lustre/llite/xattr.c
index ca45354..6325c8a 100644 (file)
--- a/lustre/llite/xattr.c
+++ b/lustre/llite/xattr.c
@@ -623,6 +623,7 @@ static int ll_xattr_get(const struct xattr_handler *handler,
 
 ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
 {
+       struct inode *dir = d_inode(dentry->d_parent);
        struct inode *inode = dentry->d_inode;
        struct ll_sb_info *sbi = ll_i2sbi(inode);
        ktime_t kstart = ktime_get();
@@ -666,6 +667,20 @@ ssize_t ll_listxattr(struct dentry *dentry, char *buffer, size_t size)
                                hide_xattr = true;
                }
 
+               /* Hide virtual project id xattr from the list when
+                * parent has the inherit flag and the same project id,
+                * so project id won't be messed up by copying the xattrs
+                * when mv to a tree with different project id.
+                */
+               if (get_xattr_type(xattr_name)->flags == XATTR_TRUSTED_T &&
+                   strcmp(xattr_name, XATTR_NAME_PROJID) == 0) {
+                       if (ll_i2info(inode)->lli_projid ==
+                                       ll_i2info(dir)->lli_projid &&
+                           test_bit(LLIF_PROJECT_INHERIT,
+                                    &ll_i2info(dir)->lli_flags))
+                               hide_xattr = true;
+               }
+
                len = strnlen(xattr_name, rem - 1) + 1;
                rem -= len;
                if (!xattr_type_filter(sbi, hide_xattr ? NULL :