From: Andreas Gruenbacher <andreas.gruenbacher@gmail.com>
To: Alexander Viro <viro@zeniv.linux.org.uk>,
linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
Artem Bityutskiy <dedekind1@gmail.com>,
Adrian Hunter <adrian.hunter@intel.com>,
linux-mtd@lists.infradead.org,
Richard Weinberger <richard@nod.at>,
Eric Van Hensbergen <ericvh@gmail.com>,
Ron Minnich <rminnich@sandia.gov>,
Latchesar Ionkov <lucho@ionkov.net>,
v9fs-developer@lists.sourceforge.net
Subject: [PATCH 5/5] xattr handlers: Some simplifications
Date: Fri, 4 Sep 2015 13:57:22 +0200 [thread overview]
Message-ID: <1441367842-25079-6-git-send-email-agruenba@redhat.com> (raw)
In-Reply-To: <1441367842-25079-1-git-send-email-agruenba@redhat.com>
We have access to struct xattr_handler inside the list/get/set operations now,
so simplify some of the xattr code.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
---
fs/9p/Makefile | 5 +---
fs/9p/acl.c | 51 ++++-----------------------------
fs/9p/xattr.c | 42 +++++++++++++++++++++++++++
fs/9p/xattr.h | 3 --
fs/9p/xattr_security.c | 56 ------------------------------------
fs/9p/xattr_trusted.c | 56 ------------------------------------
fs/9p/xattr_user.c | 56 ------------------------------------
fs/f2fs/xattr.c | 18 ++++--------
fs/posix_acl.c | 7 +----
fs/squashfs/xattr.c | 77 +++++++++++++++++---------------------------------
10 files changed, 80 insertions(+), 291 deletions(-)
delete mode 100644 fs/9p/xattr_security.c
delete mode 100644 fs/9p/xattr_trusted.c
delete mode 100644 fs/9p/xattr_user.c
diff --git a/fs/9p/Makefile b/fs/9p/Makefile
index ff7be98..9619cca 100644
--- a/fs/9p/Makefile
+++ b/fs/9p/Makefile
@@ -10,10 +10,7 @@ obj-$(CONFIG_9P_FS) := 9p.o
vfs_dentry.o \
v9fs.o \
fid.o \
- xattr.o \
- xattr_user.o \
- xattr_trusted.o
+ xattr.o
9p-$(CONFIG_9P_FSCACHE) += cache.o
9p-$(CONFIG_9P_FS_POSIX_ACL) += acl.o
-9p-$(CONFIG_9P_FS_SECURITY) += xattr_security.o
diff --git a/fs/9p/acl.c b/fs/9p/acl.c
index a9e5d72..5325304 100644
--- a/fs/9p/acl.c
+++ b/fs/9p/acl.c
@@ -212,31 +212,12 @@ int v9fs_acl_mode(struct inode *dir, umode_t *modep,
return 0;
}
-static int v9fs_remote_get_acl(struct dentry *dentry, const char *name,
- void *buffer, size_t size, int type)
-{
- char *full_name;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- full_name = POSIX_ACL_XATTR_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- full_name = POSIX_ACL_XATTR_DEFAULT;
- break;
- default:
- BUG();
- }
- return v9fs_xattr_get(dentry, full_name, buffer, size);
-}
-
static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
void *buffer, size_t size,
const struct xattr_handler *handler)
{
struct v9fs_session_info *v9ses;
struct posix_acl *acl;
- int type = handler->flags;
int error;
if (strcmp(name, "") != 0)
@@ -247,9 +228,9 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
* We allow set/get/list of acl when access=client is not specified
*/
if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_remote_get_acl(dentry, name, buffer, size, type);
+ return v9fs_xattr_get(dentry, handler->prefix, buffer, size);
- acl = v9fs_get_cached_acl(d_inode(dentry), type);
+ acl = v9fs_get_cached_acl(d_inode(dentry), handler->flags);
if (IS_ERR(acl))
return PTR_ERR(acl);
if (acl == NULL)
@@ -260,26 +241,6 @@ static int v9fs_xattr_get_acl(struct dentry *dentry, const char *name,
return error;
}
-static int v9fs_remote_set_acl(struct dentry *dentry, const char *name,
- const void *value, size_t size,
- int flags, int type)
-{
- char *full_name;
-
- switch (type) {
- case ACL_TYPE_ACCESS:
- full_name = POSIX_ACL_XATTR_ACCESS;
- break;
- case ACL_TYPE_DEFAULT:
- full_name = POSIX_ACL_XATTR_DEFAULT;
- break;
- default:
- BUG();
- }
- return v9fs_xattr_set(dentry, full_name, value, size, flags);
-}
-
-
static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
const void *value, size_t size,
int flags, const struct xattr_handler *handler)
@@ -298,8 +259,8 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
* xattr value. We leave it to the server to validate
*/
if ((v9ses->flags & V9FS_ACCESS_MASK) != V9FS_ACCESS_CLIENT)
- return v9fs_remote_set_acl(dentry, name,
- value, size, flags, handler->flags);
+ return v9fs_xattr_set(dentry, handler->prefix,
+ value, size, flags);
if (S_ISLNK(inode->i_mode))
return -EOPNOTSUPP;
@@ -320,7 +281,6 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
switch (handler->flags) {
case ACL_TYPE_ACCESS:
- name = POSIX_ACL_XATTR_ACCESS;
if (acl) {
umode_t mode = inode->i_mode;
retval = posix_acl_equiv_mode(acl, &mode);
@@ -351,7 +311,6 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
}
break;
case ACL_TYPE_DEFAULT:
- name = POSIX_ACL_XATTR_DEFAULT;
if (!S_ISDIR(inode->i_mode)) {
retval = acl ? -EINVAL : 0;
goto err_out;
@@ -360,7 +319,7 @@ static int v9fs_xattr_set_acl(struct dentry *dentry, const char *name,
default:
BUG();
}
- retval = v9fs_xattr_set(dentry, name, value, size, flags);
+ retval = v9fs_xattr_set(dentry, handler->prefix, value, size, flags);
if (!retval)
set_cached_acl(inode, handler->flags, acl);
err_out:
diff --git a/fs/9p/xattr.c b/fs/9p/xattr.c
index 0cf44b6..00b28f4 100644
--- a/fs/9p/xattr.c
+++ b/fs/9p/xattr.c
@@ -137,6 +137,48 @@ ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
return v9fs_xattr_get(dentry, NULL, buffer, buffer_size);
}
+static int v9fs_xattr_handler_get(struct dentry *dentry, const char *name,
+ void *buffer, size_t size,
+ const struct xattr_handler *handler)
+{
+ int prefix_len = strlen(handler->prefix);
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return v9fs_xattr_get(dentry, name - prefix_len, buffer, size);
+}
+
+static int v9fs_xattr_handler_set(struct dentry *dentry, const char *name,
+ const void *value, size_t size, int flags,
+ const struct xattr_handler *handler)
+{
+ int prefix_len = strlen(handler->prefix);
+
+ if (strcmp(name, "") == 0)
+ return -EINVAL;
+ return v9fs_xattr_set(dentry, name - prefix_len, value, size, flags);
+}
+
+static struct xattr_handler v9fs_xattr_user_handler = {
+ .prefix = XATTR_USER_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+
+static struct xattr_handler v9fs_xattr_trusted_handler = {
+ .prefix = XATTR_TRUSTED_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+
+#ifdef CONFIG_9P_FS_SECURITY
+static struct xattr_handler v9fs_xattr_security_handler = {
+ .prefix = XATTR_SECURITY_PREFIX,
+ .get = v9fs_xattr_handler_get,
+ .set = v9fs_xattr_handler_set,
+};
+#endif
+
const struct xattr_handler *v9fs_xattr_handlers[] = {
&v9fs_xattr_user_handler,
&v9fs_xattr_trusted_handler,
diff --git a/fs/9p/xattr.h b/fs/9p/xattr.h
index d3e2ea3..c63c3be 100644
--- a/fs/9p/xattr.h
+++ b/fs/9p/xattr.h
@@ -19,9 +19,6 @@
#include <net/9p/client.h>
extern const struct xattr_handler *v9fs_xattr_handlers[];
-extern struct xattr_handler v9fs_xattr_user_handler;
-extern struct xattr_handler v9fs_xattr_trusted_handler;
-extern struct xattr_handler v9fs_xattr_security_handler;
extern const struct xattr_handler v9fs_xattr_acl_access_handler;
extern const struct xattr_handler v9fs_xattr_acl_default_handler;
diff --git a/fs/9p/xattr_security.c b/fs/9p/xattr_security.c
deleted file mode 100644
index 1d99c65..0000000
--- a/fs/9p/xattr_security.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright IBM Corporation, 2010
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_security_get(struct dentry *dentry, const char *name,
- void *buffer, size_t size,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_SECURITY_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_get(dentry, full_name, buffer, size);
-}
-
-static int v9fs_xattr_security_set(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_SECURITY_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_set(dentry, full_name, value, size, flags);
-}
-
-struct xattr_handler v9fs_xattr_security_handler = {
- .prefix = XATTR_SECURITY_PREFIX,
- .get = v9fs_xattr_security_get,
- .set = v9fs_xattr_security_set,
-};
diff --git a/fs/9p/xattr_trusted.c b/fs/9p/xattr_trusted.c
deleted file mode 100644
index 1a24647..0000000
--- a/fs/9p/xattr_trusted.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright IBM Corporation, 2010
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_trusted_get(struct dentry *dentry, const char *name,
- void *buffer, size_t size,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_TRUSTED_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_get(dentry, full_name, buffer, size);
-}
-
-static int v9fs_xattr_trusted_set(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_TRUSTED_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_set(dentry, full_name, value, size, flags);
-}
-
-struct xattr_handler v9fs_xattr_trusted_handler = {
- .prefix = XATTR_TRUSTED_PREFIX,
- .get = v9fs_xattr_trusted_get,
- .set = v9fs_xattr_trusted_set,
-};
diff --git a/fs/9p/xattr_user.c b/fs/9p/xattr_user.c
deleted file mode 100644
index 2c35e16..0000000
--- a/fs/9p/xattr_user.c
+++ /dev/null
@@ -1,56 +0,0 @@
-/*
- * Copyright IBM Corporation, 2010
- * Author Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of version 2.1 of the GNU Lesser General Public License
- * as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
- *
- */
-
-
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "xattr.h"
-
-static int v9fs_xattr_user_get(struct dentry *dentry, const char *name,
- void *buffer, size_t size,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_USER_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_get(dentry, full_name, buffer, size);
-}
-
-static int v9fs_xattr_user_set(struct dentry *dentry, const char *name,
- const void *value, size_t size, int flags,
- const struct xattr_handler *handler)
-{
- const char *full_name = name - XATTR_USER_PREFIX_LEN;
-
- if (name == NULL)
- return -EINVAL;
-
- if (strcmp(name, "") == 0)
- return -EINVAL;
-
- return v9fs_xattr_set(dentry, full_name, value, size, flags);
-}
-
-struct xattr_handler v9fs_xattr_user_handler = {
- .prefix = XATTR_USER_PREFIX,
- .get = v9fs_xattr_user_get,
- .set = v9fs_xattr_user_set,
-};
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index eeb7206..7ee6d34 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -30,33 +30,27 @@ static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list,
const struct xattr_handler *handler)
{
struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
- int total_len, prefix_len = 0;
- const char *prefix = NULL;
+ int total_len, prefix_len;
switch (handler->flags) {
case F2FS_XATTR_INDEX_USER:
if (!test_opt(sbi, XATTR_USER))
return -EOPNOTSUPP;
- prefix = XATTR_USER_PREFIX;
- prefix_len = XATTR_USER_PREFIX_LEN;
break;
case F2FS_XATTR_INDEX_TRUSTED:
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- prefix = XATTR_TRUSTED_PREFIX;
- prefix_len = XATTR_TRUSTED_PREFIX_LEN;
break;
case F2FS_XATTR_INDEX_SECURITY:
- prefix = XATTR_SECURITY_PREFIX;
- prefix_len = XATTR_SECURITY_PREFIX_LEN;
break;
default:
return -EINVAL;
}
+ prefix_len = strlen(handler->prefix);
total_len = prefix_len + len + 1;
if (list && total_len <= list_size) {
- memcpy(list, prefix, prefix_len);
+ memcpy(list, handler->prefix, prefix_len);
memcpy(list + prefix_len, name, len);
list[prefix_len + len] = '\0';
}
@@ -64,7 +58,8 @@ static size_t f2fs_xattr_generic_list(struct dentry *dentry, char *list,
}
static int f2fs_xattr_generic_get(struct dentry *dentry, const char *name,
- void *buffer, size_t size, const struct xattr_handler *handler)
+ void *buffer, size_t size,
+ const struct xattr_handler *handler)
{
struct f2fs_sb_info *sbi = F2FS_SB(dentry->d_sb);
@@ -122,9 +117,6 @@ static size_t f2fs_xattr_advise_list(struct dentry *dentry, char *list,
const char *xname = F2FS_SYSTEM_ADVISE_PREFIX;
size_t size;
- if (handler->flags != F2FS_XATTR_INDEX_ADVISE)
- return 0;
-
size = strlen(xname) + 1;
if (list && size <= list_size)
memcpy(list, xname, size);
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 1c7e94f..cea22e6 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -828,7 +828,7 @@ posix_acl_xattr_list(struct dentry *dentry, char *list, size_t list_size,
const char *name, size_t name_len,
const struct xattr_handler *handler)
{
- const char *xname;
+ const char *xname = handler->prefix;
size_t size;
if (!IS_POSIXACL(d_backing_inode(dentry)))
@@ -836,11 +836,6 @@ posix_acl_xattr_list(struct dentry *dentry, char *list, size_t list_size,
if (d_is_symlink(dentry))
return -EOPNOTSUPP;
- if (handler->flags == ACL_TYPE_ACCESS)
- xname = POSIX_ACL_XATTR_ACCESS;
- else
- xname = POSIX_ACL_XATTR_DEFAULT;
-
size = strlen(xname) + 1;
if (list && size <= list_size)
memcpy(list, xname, size);
diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c
index 05ef4b9..268e25b 100644
--- a/fs/squashfs/xattr.c
+++ b/fs/squashfs/xattr.c
@@ -212,90 +212,65 @@ failed:
}
-/*
- * User namespace support
- */
-static size_t squashfs_user_list(struct dentry *d, char *list, size_t list_size,
- const char *name, size_t name_len, const struct xattr_handler *handler)
+static size_t squashfs_xattr_handler_list(struct dentry *d, char *list,
+ size_t list_size, const char *name, size_t name_len,
+ const struct xattr_handler *handler)
{
- if (list && XATTR_USER_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
- return XATTR_USER_PREFIX_LEN;
+ int len = strlen(handler->prefix);
+
+ if (list && len <= list_size)
+ memcpy(list, handler->prefix, len);
+ return len;
}
-static int squashfs_user_get(struct dentry *d, const char *name, void *buffer,
- size_t size, const struct xattr_handler *handler)
+static int squashfs_xattr_handler_get(struct dentry *d, const char *name,
+ void *buffer, size_t size, const struct xattr_handler *handler)
{
if (name[0] == '\0')
return -EINVAL;
- return squashfs_xattr_get(d_inode(d), SQUASHFS_XATTR_USER, name,
+ return squashfs_xattr_get(d_inode(d), handler->flags, name,
buffer, size);
}
+/*
+ * User namespace support
+ */
static const struct xattr_handler squashfs_xattr_user_handler = {
.prefix = XATTR_USER_PREFIX,
- .list = squashfs_user_list,
- .get = squashfs_user_get
+ .flags = SQUASHFS_XATTR_USER,
+ .list = squashfs_xattr_handler_list,
+ .get = squashfs_xattr_handler_get
};
/*
* Trusted namespace support
*/
-static size_t squashfs_trusted_list(struct dentry *d, char *list,
+static size_t squashfs_trusted_xattr_handler_list(struct dentry *d, char *list,
size_t list_size, const char *name, size_t name_len,
const struct xattr_handler *handler)
{
if (!capable(CAP_SYS_ADMIN))
return 0;
-
- if (list && XATTR_TRUSTED_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_TRUSTED_PREFIX, XATTR_TRUSTED_PREFIX_LEN);
- return XATTR_TRUSTED_PREFIX_LEN;
-}
-
-static int squashfs_trusted_get(struct dentry *d, const char *name,
- void *buffer, size_t size, const struct xattr_handler *handler)
-{
- if (name[0] == '\0')
- return -EINVAL;
-
- return squashfs_xattr_get(d_inode(d), SQUASHFS_XATTR_TRUSTED, name,
- buffer, size);
+ return squashfs_xattr_handler_list(d, list, list_size, name, name_len,
+ handler);
}
static const struct xattr_handler squashfs_xattr_trusted_handler = {
.prefix = XATTR_TRUSTED_PREFIX,
- .list = squashfs_trusted_list,
- .get = squashfs_trusted_get
+ .flags = SQUASHFS_XATTR_TRUSTED,
+ .list = squashfs_trusted_xattr_handler_list,
+ .get = squashfs_xattr_handler_get
};
/*
* Security namespace support
*/
-static size_t squashfs_security_list(struct dentry *d, char *list,
- size_t list_size, const char *name, size_t name_len,
- const struct xattr_handler *handler)
-{
- if (list && XATTR_SECURITY_PREFIX_LEN <= list_size)
- memcpy(list, XATTR_SECURITY_PREFIX, XATTR_SECURITY_PREFIX_LEN);
- return XATTR_SECURITY_PREFIX_LEN;
-}
-
-static int squashfs_security_get(struct dentry *d, const char *name,
- void *buffer, size_t size, const struct xattr_handler *handler)
-{
- if (name[0] == '\0')
- return -EINVAL;
-
- return squashfs_xattr_get(d_inode(d), SQUASHFS_XATTR_SECURITY, name,
- buffer, size);
-}
-
static const struct xattr_handler squashfs_xattr_security_handler = {
.prefix = XATTR_SECURITY_PREFIX,
- .list = squashfs_security_list,
- .get = squashfs_security_get
+ .flags = SQUASHFS_XATTR_SECURITY,
+ .list = squashfs_xattr_handler_list,
+ .get = squashfs_xattr_handler_get
};
static const struct xattr_handler *squashfs_xattr_handler(int type)
--
2.4.3
next prev parent reply other threads:[~2015-09-04 11:57 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-09-04 11:57 [PATCH 0/5] Pass xattr handler to xattr handler operations Andreas Gruenbacher
2015-09-04 11:57 ` [PATCH 1/5] ubifs: Remove unused "security.*" xattr handler Andreas Gruenbacher
2015-09-04 11:57 ` [PATCH 2/5] hfsplus: Remove unused xattr handler list operations Andreas Gruenbacher
2015-09-04 11:57 ` [PATCH 3/5] 9p: Simplify the xattr handlers Andreas Gruenbacher
2015-09-16 14:14 ` Christoph Hellwig
2015-09-21 7:30 ` Aneesh Kumar K.V
2015-09-04 11:57 ` [PATCH 4/5] xattr handlers: Pass handler to operations instead of flags Andreas Gruenbacher
2015-09-16 14:16 ` Christoph Hellwig
2015-09-04 11:57 ` Andreas Gruenbacher [this message]
2015-09-16 14:17 ` [PATCH 5/5] xattr handlers: Some simplifications Christoph Hellwig
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