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Subject[PATCH 49/52] CRED: Pass credentials through the xattr list() handler
Date
Pass credentials through the xattr list() handler.

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

fs/ext3/acl.c | 5 +++--
fs/ext3/xattr.c | 27 +++++++++++++++++----------
fs/ext3/xattr.h | 2 +-
fs/ext3/xattr_security.c | 2 +-
fs/ext3/xattr_trusted.c | 2 +-
fs/ext3/xattr_user.c | 2 +-
fs/xattr.c | 6 ++++--
include/linux/xattr.h | 2 +-
mm/shmem.c | 2 +-
mm/shmem_acl.c | 4 ++--
10 files changed, 32 insertions(+), 22 deletions(-)

diff --git a/fs/ext3/acl.c b/fs/ext3/acl.c
index 0ce1d87..b2d676e 100644
--- a/fs/ext3/acl.c
+++ b/fs/ext3/acl.c
@@ -420,7 +420,7 @@ out:
*/
static size_t
ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
const size_t size = sizeof(POSIX_ACL_XATTR_ACCESS);

@@ -433,7 +433,8 @@ ext3_xattr_list_acl_access(struct inode *inode, char *list, size_t list_len,

static size_t
ext3_xattr_list_acl_default(struct inode *inode, char *list, size_t list_len,
- const char *name, size_t name_len)
+ const char *name, size_t name_len,
+ struct cred *cred)
{
const size_t size = sizeof(POSIX_ACL_XATTR_DEFAULT);

diff --git a/fs/ext3/xattr.c b/fs/ext3/xattr.c
index 3b34cea..464395d 100644
--- a/fs/ext3/xattr.c
+++ b/fs/ext3/xattr.c
@@ -145,7 +145,8 @@ ext3_xattr_handler(int name_index)
ssize_t
ext3_listxattr(struct dentry *dentry, char *buffer, size_t size)
{
- return ext3_xattr_list(dentry->d_inode, buffer, size);
+ struct cred *cred = current->cred;
+ return ext3_xattr_list(dentry->d_inode, buffer, size, cred);
}

static int
@@ -331,7 +332,7 @@ ext3_xattr_get(struct inode *inode, int name_index, const char *name,

static int
ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
- char *buffer, size_t buffer_size)
+ char *buffer, size_t buffer_size, struct cred *cred)
{
size_t rest = buffer_size;

@@ -342,7 +343,8 @@ ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
if (handler) {
size_t size = handler->list(inode, buffer, rest,
entry->e_name,
- entry->e_name_len);
+ entry->e_name_len,
+ cred);
if (buffer) {
if (size > rest)
return -ERANGE;
@@ -355,7 +357,8 @@ ext3_xattr_list_entries(struct inode *inode, struct ext3_xattr_entry *entry,
}

static int
-ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size,
+ struct cred *cred)
{
struct buffer_head *bh = NULL;
int error;
@@ -381,7 +384,8 @@ ext3_xattr_block_list(struct inode *inode, char *buffer, size_t buffer_size)
goto cleanup;
}
ext3_xattr_cache_insert(bh);
- error = ext3_xattr_list_entries(inode, BFIRST(bh), buffer, buffer_size);
+ error = ext3_xattr_list_entries(inode, BFIRST(bh), buffer, buffer_size,
+ cred);

cleanup:
brelse(bh);
@@ -390,7 +394,8 @@ cleanup:
}

static int
-ext3_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext3_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size,
+ struct cred *cred)
{
struct ext3_xattr_ibody_header *header;
struct ext3_inode *raw_inode;
@@ -410,7 +415,7 @@ ext3_xattr_ibody_list(struct inode *inode, char *buffer, size_t buffer_size)
if (error)
goto cleanup;
error = ext3_xattr_list_entries(inode, IFIRST(header),
- buffer, buffer_size);
+ buffer, buffer_size, cred);

cleanup:
brelse(iloc.bh);
@@ -428,12 +433,13 @@ cleanup:
* used / required on success.
*/
int
-ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
+ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size,
+ struct cred *cred)
{
int i_error, b_error;

down_read(&EXT3_I(inode)->xattr_sem);
- i_error = ext3_xattr_ibody_list(inode, buffer, buffer_size);
+ i_error = ext3_xattr_ibody_list(inode, buffer, buffer_size, cred);
if (i_error < 0) {
b_error = 0;
} else {
@@ -441,7 +447,8 @@ ext3_xattr_list(struct inode *inode, char *buffer, size_t buffer_size)
buffer += i_error;
buffer_size -= i_error;
}
- b_error = ext3_xattr_block_list(inode, buffer, buffer_size);
+ b_error = ext3_xattr_block_list(inode, buffer, buffer_size,
+ cred);
if (b_error < 0)
i_error = 0;
}
diff --git a/fs/ext3/xattr.h b/fs/ext3/xattr.h
index 8d00a18..9ed3328 100644
--- a/fs/ext3/xattr.h
+++ b/fs/ext3/xattr.h
@@ -67,7 +67,7 @@ extern struct xattr_handler ext3_xattr_security_handler;
extern ssize_t ext3_listxattr(struct dentry *, char *, size_t);

extern int ext3_xattr_get(struct inode *, int, const char *, void *, size_t);
-extern int ext3_xattr_list(struct inode *, char *, size_t);
+extern int ext3_xattr_list(struct inode *, char *, size_t, struct cred *);
extern int ext3_xattr_set(struct inode *, int, const char *, const void *,
size_t, int, struct cred *);
extern int ext3_xattr_set_handle(handle_t *, struct inode *, int, const char *,
diff --git a/fs/ext3/xattr_security.c b/fs/ext3/xattr_security.c
index 7d01840..1680b7b 100644
--- a/fs/ext3/xattr_security.c
+++ b/fs/ext3/xattr_security.c
@@ -13,7 +13,7 @@

static size_t
ext3_xattr_security_list(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
const size_t prefix_len = sizeof(XATTR_SECURITY_PREFIX)-1;
const size_t total_len = prefix_len + name_len + 1;
diff --git a/fs/ext3/xattr_trusted.c b/fs/ext3/xattr_trusted.c
index 6073729..049587b 100644
--- a/fs/ext3/xattr_trusted.c
+++ b/fs/ext3/xattr_trusted.c
@@ -17,7 +17,7 @@

static size_t
ext3_xattr_trusted_list(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
const size_t prefix_len = sizeof(XATTR_TRUSTED_PREFIX)-1;
const size_t total_len = prefix_len + name_len + 1;
diff --git a/fs/ext3/xattr_user.c b/fs/ext3/xattr_user.c
index f8a7663..6012c7e 100644
--- a/fs/ext3/xattr_user.c
+++ b/fs/ext3/xattr_user.c
@@ -16,7 +16,7 @@

static size_t
ext3_xattr_user_list(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
const size_t prefix_len = sizeof(XATTR_USER_PREFIX)-1;
const size_t total_len = prefix_len + name_len + 1;
diff --git a/fs/xattr.c b/fs/xattr.c
index 3c9bf2e..b1ee403 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -563,18 +563,20 @@ generic_getxattr(struct dentry *dentry, const char *name, void *buffer, size_t s
ssize_t
generic_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
+ struct cred *cred = current->cred;
struct inode *inode = dentry->d_inode;
struct xattr_handler *handler, **handlers = inode->i_sb->s_xattr;
unsigned int size = 0;

if (!buffer) {
for_each_xattr_handler(handlers, handler)
- size += handler->list(inode, NULL, 0, NULL, 0);
+ size += handler->list(inode, NULL, 0, NULL, 0, cred);
} else {
char *buf = buffer;

for_each_xattr_handler(handlers, handler) {
- size = handler->list(inode, buf, buffer_size, NULL, 0);
+ size = handler->list(inode, buf, buffer_size, NULL, 0,
+ cred);
if (size > buffer_size)
return -ERANGE;
buf += size;
diff --git a/include/linux/xattr.h b/include/linux/xattr.h
index e702226..485d57c 100644
--- a/include/linux/xattr.h
+++ b/include/linux/xattr.h
@@ -39,7 +39,7 @@ struct dentry;
struct xattr_handler {
char *prefix;
size_t (*list)(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len);
+ const char *name, size_t name_len, struct cred *cred);
int (*get)(struct inode *inode, const char *name, void *buffer,
size_t size, struct cred *cred);
int (*set)(struct inode *inode, const char *name, const void *buffer,
diff --git a/mm/shmem.c b/mm/shmem.c
index 45cc69e..24d3237 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1961,7 +1961,7 @@ static const struct inode_operations shmem_symlink_inode_operations = {

static size_t shmem_xattr_security_list(struct inode *inode, char *list,
size_t list_len, const char *name,
- size_t name_len)
+ size_t name_len, struct cred *cred)
{
return security_inode_listsecurity(inode, list, list_len);
}
diff --git a/mm/shmem_acl.c b/mm/shmem_acl.c
index 7685a67..cda0a12 100644
--- a/mm/shmem_acl.c
+++ b/mm/shmem_acl.c
@@ -71,7 +71,7 @@ struct generic_acl_operations shmem_acl_ops = {

static size_t
shmem_list_acl_access(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
return generic_acl_list(inode, &shmem_acl_ops, ACL_TYPE_ACCESS,
list, list_size);
@@ -112,7 +112,7 @@ struct xattr_handler shmem_xattr_acl_access_handler = {

static size_t
shmem_list_acl_default(struct inode *inode, char *list, size_t list_size,
- const char *name, size_t name_len)
+ const char *name, size_t name_len, struct cred *cred)
{
return generic_acl_list(inode, &shmem_acl_ops, ACL_TYPE_DEFAULT,
list, list_size);
-
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