vfs: Add permission2 for filesystems with per mount permissions

This allows filesystems to use their mount private data to influence the permssions they return in permission2. It has been separated into a new call to avoid disrupting current permission users. Change-Id: I9d416e3b8b6eca84ef3e336bd2af89ddd51df6ca Signed-off-by: Daniel Rosenberg <[email protected]>
yuweiyuan8 · Mar 5, 2017 · d2f3072 · d2f3072
1 parent 4756af5
commit d2f3072
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Showing 10 changed files with 166 additions and 73 deletions.
diff --git a/fs/exec.c b/fs/exec.c
@@ -1100,7 +1100,7 @@ EXPORT_SYMBOL(flush_old_exec);
 
 void would_dump(struct linux_binprm *bprm, struct file *file)
 {
-	if (inode_permission(file_inode(file), MAY_READ) < 0)
+	if (inode_permission2(file->f_path.mnt, file_inode(file), MAY_READ) < 0)
 		bprm->interp_flags |= BINPRM_FLAGS_ENFORCE_NONDUMP;
 }
 EXPORT_SYMBOL(would_dump);