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xattr: Constify ->name member of "struct xattr".

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Since everybody sets kstrdup()ed constant string to "struct xattr"->name but
nobody modifies "struct xattr"->name , we can omit kstrdup() and its failure
checking by constifying ->name member of "struct xattr".

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reviewed-by: Joel Becker <jlbec@evilplan.org> [ocfs2]
Acked-by: Serge E. Hallyn <serge.hallyn@ubuntu.com>
Acked-by: Casey Schaufler <casey@schaufler-ca.com>
Acked-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Reviewed-by: Paul Moore <paul@paul-moore.com>
Tested-by: Paul Moore <paul@paul-moore.com>
Acked-by: Eric Paris <eparis@redhat.com>
Signed-off-by: James Morris <james.l.morris@oracle.com>
This commit is contained in:
Tetsuo Handa 2013-07-25 05:44:02 +09:00 committed by James Morris
parent be0306bcc3
commit 9548906b2b
9 changed files with 21 additions and 31 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ocfs2/xattr.h
View File

@ -32,7 +32,7 @@ enum ocfs2_xattr_type {
struct ocfs2_security_xattr_info {
int enable;
char *name;
const char *name;
void *value;
size_t value_len;
};

8
include/linux/security.h
View File

@ -1492,7 +1492,7 @@ struct security_operations {
int (*inode_alloc_security) (struct inode *inode);
void (*inode_free_security) (struct inode *inode);
int (*inode_init_security) (struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr, const char **name,
void **value, size_t *len);
int (*inode_create) (struct inode *dir,
struct dentry *dentry, umode_t mode);
@ -1770,7 +1770,7 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr,
initxattrs initxattrs, void *fs_data);
int security_old_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr, const char **name,
void **value, size_t *len);
int security_inode_create(struct inode *dir, struct dentry *dentry, umode_t mode);
int security_inode_link(struct dentry *old_dentry, struct inode *dir,
@ -2094,8 +2094,8 @@ static inline int security_inode_init_security(struct inode *inode,
static inline int security_old_inode_init_security(struct inode *inode,
struct inode *dir,
const struct qstr *qstr,
char **name, void **value,
size_t *len)
const char **name,
void **value, size_t *len)
{
return -EOPNOTSUPP;
}

2
include/linux/xattr.h
View File

@ -31,7 +31,7 @@ struct xattr_handler {
};
struct xattr {
char *name;
const char *name;
void *value;
size_t value_len;
};

2
include/uapi/linux/reiserfs_xattr.h
View File

@ -16,7 +16,7 @@ struct reiserfs_xattr_header {
};
struct reiserfs_security_handle {
char *name;
const char *name;
void *value;
size_t length;
};

2
security/capability.c
View File

@ -129,7 +129,7 @@ static void cap_inode_free_security(struct inode *inode)
}
static int cap_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr, const char **name,
void **value, size_t *len)
{
return -EOPNOTSUPP;

2
security/integrity/evm/evm_main.c
View File

@ -418,7 +418,7 @@ int evm_inode_init_security(struct inode *inode,
evm_xattr->value = xattr_data;
evm_xattr->value_len = sizeof(*xattr_data);
evm_xattr->name = kstrdup(XATTR_EVM_SUFFIX, GFP_NOFS);
evm_xattr->name = XATTR_EVM_SUFFIX;
return 0;
out:
kfree(xattr_data);

8
security/security.c
View File

@ -348,10 +348,10 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
if (unlikely(IS_PRIVATE(inode)))
return 0;
memset(new_xattrs, 0, sizeof new_xattrs);
if (!initxattrs)
return security_ops->inode_init_security(inode, dir, qstr,
NULL, NULL, NULL);
memset(new_xattrs, 0, sizeof(new_xattrs));
lsm_xattr = new_xattrs;
ret = security_ops->inode_init_security(inode, dir, qstr,
&lsm_xattr->name,
@ -366,16 +366,14 @@ int security_inode_init_security(struct inode *inode, struct inode *dir,
goto out;
ret = initxattrs(inode, new_xattrs, fs_data);
out:
for (xattr = new_xattrs; xattr->name != NULL; xattr++) {
kfree(xattr->name);
for (xattr = new_xattrs; xattr->value != NULL; xattr++)
kfree(xattr->value);
}
return (ret == -EOPNOTSUPP) ? 0 : ret;
}
EXPORT_SYMBOL(security_inode_init_security);
int security_old_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr, const char **name,
void **value, size_t *len)
{
if (unlikely(IS_PRIVATE(inode)))

17
security/selinux/hooks.c
View File

@ -2587,7 +2587,8 @@ static int selinux_dentry_init_security(struct dentry *dentry, int mode,
}
static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr,
const char **name,
void **value, size_t *len)
{
const struct task_security_struct *tsec = current_security();
@ -2595,7 +2596,7 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
struct superblock_security_struct *sbsec;
u32 sid, newsid, clen;
int rc;
char *namep = NULL, *context;
char *context;
dsec = dir->i_security;
sbsec = dir->i_sb->s_security;
@ -2631,19 +2632,13 @@ static int selinux_inode_init_security(struct inode *inode, struct inode *dir,
if (!ss_initialized || !(sbsec->flags & SE_SBLABELSUPP))
return -EOPNOTSUPP;
if (name) {
namep = kstrdup(XATTR_SELINUX_SUFFIX, GFP_NOFS);
if (!namep)
return -ENOMEM;
*name = namep;
}
if (name)
*name = XATTR_SELINUX_SUFFIX;
if (value && len) {
rc = security_sid_to_context_force(newsid, &context, &clen);
if (rc) {
kfree(namep);
if (rc)
return rc;
}
*value = context;
*len = clen;
}

9
security/smack/smack_lsm.c
View File

@ -582,7 +582,7 @@ static void smack_inode_free_security(struct inode *inode)
* Returns 0 if it all works out, -ENOMEM if there's no memory
*/
static int smack_inode_init_security(struct inode *inode, struct inode *dir,
const struct qstr *qstr, char **name,
const struct qstr *qstr, const char **name,
void **value, size_t *len)
{
struct inode_smack *issp = inode->i_security;
@ -591,11 +591,8 @@ static int smack_inode_init_security(struct inode *inode, struct inode *dir,
char *dsp = smk_of_inode(dir);
int may;
if (name) {
*name = kstrdup(XATTR_SMACK_SUFFIX, GFP_NOFS);
if (*name == NULL)
return -ENOMEM;
}
if (name)
*name = XATTR_SMACK_SUFFIX;
if (value) {
rcu_read_lock();