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Subject[PATCH 48/52] CRED: Pass credentials through the getxattr() inode op
Date
Pass credentials through the getxattr() inode operation.

Signed-off-by: David Howells <dhowells@redhat.com>
---

fs/bad_inode.c | 2 +-
fs/nfs/nfs3acl.c | 3 +--
fs/nfs/nfs4_fs.h | 3 ++-
fs/nfs/nfs4proc.c | 3 +--
fs/xattr.c | 7 ++++---
include/linux/fs.h | 3 ++-
include/linux/nfs_fs.h | 3 ++-
include/linux/xattr.h | 3 ++-
security/selinux/hooks.c | 9 +++++----
9 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/fs/bad_inode.c b/fs/bad_inode.c
index d82d101..b310af3 100644
--- a/fs/bad_inode.c
+++ b/fs/bad_inode.c
@@ -272,7 +272,7 @@ static int bad_inode_setxattr(struct dentry *dentry, const char *name,
}

static ssize_t bad_inode_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, struct cred *cred)
{
return -EIO;
}
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index c09da17..0d160be 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -48,9 +48,8 @@ ssize_t nfs3_listxattr(struct dentry *dentry, char *buffer, size_t size)
}

ssize_t nfs3_getxattr(struct dentry *dentry, const char *name,
- void *buffer, size_t size)
+ void *buffer, size_t size, struct cred *acred)
{
- struct cred *acred = current->cred;
struct inode *inode = dentry->d_inode;
struct posix_acl *acl;
int type, error = 0;
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index ac7c050..3f3dc4e 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -167,7 +167,8 @@ extern struct dentry_operations nfs4_dentry_operations;
extern const struct inode_operations nfs4_dir_inode_operations;

/* inode.c */
-extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t);
+extern ssize_t nfs4_getxattr(struct dentry *, const char *, void *, size_t,
+ struct cred *);
extern int nfs4_setxattr(struct dentry *, const char *, const void *, size_t,
int, struct cred *);
extern ssize_t nfs4_listxattr(struct dentry *, char *, size_t);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a9a88eb..8be911a 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -3736,9 +3736,8 @@ int nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
* But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
* attributes in kernel-managed attribute namespaces. */
ssize_t nfs4_getxattr(struct dentry *dentry, const char *key, void *buf,
- size_t buflen)
+ size_t buflen, struct cred *acred)
{
- struct cred *acred = current->cred;
struct inode *inode = dentry->d_inode;

if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
diff --git a/fs/xattr.c b/fs/xattr.c
index 634f0b1..3c9bf2e 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -109,6 +109,7 @@ EXPORT_SYMBOL_GPL(vfs_setxattr);
ssize_t
vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size)
{
+ struct cred *cred = current->cred;
struct inode *inode = dentry->d_inode;
int error;

@@ -121,7 +122,7 @@ vfs_getxattr(struct dentry *dentry, char *name, void *value, size_t size)
return error;

if (inode->i_op->getxattr)
- error = inode->i_op->getxattr(dentry, name, value, size);
+ error = inode->i_op->getxattr(dentry, name, value, size, cred);
else
error = -EOPNOTSUPP;

@@ -543,9 +544,9 @@ xattr_resolve_name(struct xattr_handler **handlers, const char **name)
* Find the handler for the prefix and dispatch its get() operation.
*/
ssize_t
-generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size)
+generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size,
+ struct cred *cred)
{
- struct cred *cred = current->cred;
struct xattr_handler *handler;
struct inode *inode = dentry->d_inode;

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 598006c..28f0205 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1162,7 +1162,8 @@ struct inode_operations {
struct cred *);
int (*setxattr) (struct dentry *, const char *,const void *, size_t,
int, struct cred *);
- ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t,
+ struct cred *);
ssize_t (*listxattr) (struct dentry *, char *, size_t);
int (*removexattr) (struct dentry *, const char *);
void (*truncate_range)(struct inode *, loff_t, loff_t);
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index fbd1af5..d17ba8c 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -354,7 +354,8 @@ static inline struct rpc_cred *nfs_file_cred(struct file *file)
*/
#ifdef CONFIG_NFS_V3_ACL
extern ssize_t nfs3_listxattr(struct dentry *, char *, size_t);
-extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t);
+extern ssize_t nfs3_getxattr(struct dentry *, const char *, void *, size_t,
+ struct cred *);
extern int nfs3_setxattr(struct dentry *, const char *,
const void *, size_t, int, struct cred *);
extern int nfs3_removexattr (struct dentry *, const char *name);
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index a5002eb..e702226 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -51,7 +51,8 @@ ssize_t vfs_listxattr(struct dentry *d, char *list, size_t size);
int vfs_setxattr(struct dentry *, char *, void *, size_t, int);
int vfs_removexattr(struct dentry *, char *);

-ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t size);
+ssize_t generic_getxattr(struct dentry *dentry, const char *name, void *buffer,
+ size_t size, struct cred *cred);
ssize_t generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size);
int generic_setxattr(struct dentry *dentry, const char *name, const void *value,
size_t size, int flags, struct cred *cred);
diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 3c3fff3..bcd71b9 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -634,7 +634,8 @@ static int superblock_doinit(struct super_block *sb, void *data)
rc = -EOPNOTSUPP;
goto out;
}
- rc = inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0);
+ rc = inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0,
+ &init_cred);
if (rc < 0 && rc != -ENODATA) {
if (rc == -EOPNOTSUPP)
printk(KERN_WARNING "SELinux: (dev %s, type "
@@ -897,11 +898,11 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
goto out_unlock;
}
rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX,
- context, len);
+ context, len, &init_cred);
if (rc == -ERANGE) {
/* Need a larger buffer. Query for the right size. */
rc = inode->i_op->getxattr(dentry, XATTR_NAME_SELINUX,
- NULL, 0);
+ NULL, 0, &init_cred);
if (rc < 0) {
dput(dentry);
goto out_unlock;
@@ -916,7 +917,7 @@ static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dent
}
rc = inode->i_op->getxattr(dentry,
XATTR_NAME_SELINUX,
- context, len);
+ context, len, &init_cred);
}
dput(dentry);
if (rc < 0) {
-
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