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Author SHA1 Message Date
Balaji Rao be6e8dc0ba NFS support for btrfs - v3 
Date: Mon, 21 Jul 2008 02:01:56 +0530
Here's an implementation of NFS support for btrfs. It relies on the
fixes which are going in to 2.6.28 for the NFS readdir/lookup deadlock.

This uses the btrfs_iget helper introduced previously.

[dwmw2: Tidy up a little, switch to d_obtain_alias() w/compat routine,
	change fh_type,	store parent's root object ID where needed,
	fix some get_parent() and fs_to_dentry() bugs]

Signed-off-by: Balaji Rao <balajirrao@gmail.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:06 -04:00
David Woodhouse 2db04966ae Btrfs: Change TestSetPageLocked() to trylock_page() 
Add backwards compatibility in compat.h

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
---
 compat.h    |    3 +++
 extent_io.c |    3 ++-
 2 files changed, 5 insertions(+), 1 deletions(-)

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:06 -04:00
Jeff Mahoney 12fa8ec64f Btrfs: Add workaround for AppArmor changing remove_suid() 
In openSUSE 10.3, AppArmor modifies remove_suid to take a struct path
rather than just a dentry. This patch tests that the kernel is openSUSE
10.3 or newer and adjusts the call accordingly.

Debian/Ubuntu with AppArmor applied will also need a similar patch.
Maintainers of btrfs under those distributions should build on this
patch or, alternatively, alter their package descriptions to add
-DREMOVE_SUID_PATH to the compiler command line.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
- --- /dev/null	1970-01-01 00:00:00.000000000 +0000
+++ b/compat.h	2008-02-06 16:46:13.000000000 -0500
@@ -0,0 +1,15 @@
+#ifndef _COMPAT_H_
+#define _COMPAT_H_
+
+
+/*
+ * Even if AppArmor isn't enabled, it still has different prototypes.
+ * Add more distro/version pairs here to declare which has AppArmor applied.
+ */
+#if defined(CONFIG_SUSE_KERNEL)
+# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,22)
+# define REMOVE_SUID_PATH 1
+# endif
+#endif
+
+#endif /* _COMPAT_H_ */
- --- a/file.c	2008-02-06 11:37:39.000000000 -0500
+++ b/file.c	2008-02-06 16:46:23.000000000 -0500
@@ -37,6 +37,7 @@
 #include "ordered-data.h"
 #include "ioctl.h"
 #include "print-tree.h"
+#include "compat.h"

 static int btrfs_copy_from_user(loff_t pos, int num_pages, int write_bytes,
@@ -790,7 +791,11 @@ static ssize_t btrfs_file_write(struct f
 		goto out_nolock;
 	if (count == 0)
 		goto out_nolock;
+#ifdef REMOVE_SUID_PATH
+	err = remove_suid(&file->f_path);
+#else
 	err = remove_suid(fdentry(file));
+#endif
 	if (err)
 		goto out_nolock;
 	file_update_time(file);

Signed-off-by: Chris Mason <chris.mason@oracle.com>
 2008-09-25 11:04:02 -04:00