Messages in this thread Patch in this message | | | Date | Tue, 18 Dec 2007 17:46:21 -0500 | From | Mark Lord <> | Subject | RFC: permit link(2) to work across --bind mounts ? |
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Why does link(2) not support hard-linking across bind mount points of the same underlying filesystem ?
Is it as simple as something like this patch below (minus the printk)? Not likely, but then I'm not a filesystem guru.
???
--- old/fs/namei.c 2007-12-15 12:33:13.000000000 -0500 +++ linux/fs/namei.c 2007-12-18 17:37:04.000000000 -0500 @@ -2398,8 +2398,11 @@ if (error) goto out; error = -EXDEV; - if (old_nd.mnt != nd.mnt) - goto out_release; + if (old_nd.mnt != nd.mnt) { + if (old_nd.mnt->mnt_sb != nd.mnt->mnt_sb) + goto out_release; + printk("sys_linkat: old_nd.mnt != nd.mnt, but sb is the same. Continuing..\n"); + } new_dentry = lookup_create(&nd, 0); error = PTR_ERR(new_dentry); if (IS_ERR(new_dentry))
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