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Date: Thu, 8 Jul 2010 01:17:38 +1000 From: Nick Piggin <npiggin@...e.de> To: "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com> Cc: hch@...radead.org, viro@...iv.linux.org.uk, adilger@....com, corbet@....net, serue@...ibm.com, neilb@...e.de, hooanon05@...oo.co.jp, bfields@...ldses.org, linux-fsdevel@...r.kernel.org, sfrench@...ibm.com, philippe.deniel@....FR, linux-kernel@...r.kernel.org Subject: Re: [PATCH -V14 03/11] vfs: Add open by file handle support On Tue, Jun 15, 2010 at 10:42:53PM +0530, Aneesh Kumar K.V wrote: > diff --git a/fs/open.c b/fs/open.c > index 43ac798..1c5daa3 100644 > --- a/fs/open.c > +++ b/fs/open.c > @@ -1168,3 +1168,201 @@ SYSCALL_DEFINE4(name_to_handle_at, int, dfd, const char __user *, name, > return -ENOSYS; > } > #endif > + > +#ifdef CONFIG_EXPORTFS > +static struct vfsmount *get_vfsmount_from_fd(int fd) > +{ > + int fput_needed; > + struct path *path; > + struct file *filep; > + > + if (fd == AT_FDCWD) { > + struct fs_struct *fs = current->fs; > + read_lock(&fs->lock); > + path = &fs->pwd; > + mntget(path->mnt); > + read_unlock(&fs->lock); > + } else { > + filep = fget_light(fd, &fput_needed); > + if (!filep) > + return ERR_PTR(-EBADF); > + path = &filep->f_path; > + mntget(path->mnt); > + fput_light(filep, fput_needed); > + } > + return path->mnt; > +} The bulk of this this should probably be in fs/namei.c, factored with path_init stuff if possible please. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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