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-rw-r--r--net/ipv4/cipso_ipv4.c656
-rw-r--r--net/ipv4/devinet.c9
-rw-r--r--net/ipv4/icmp.c2
-rw-r--r--net/ipv4/igmp.c2
-rw-r--r--net/ipv4/inet_diag.c2
-rw-r--r--net/ipv4/ip_fragment.c2
-rw-r--r--net/ipv4/ip_input.c2
-rw-r--r--net/ipv4/ip_options.c2
-rw-r--r--net/ipv4/ipip.c2
-rw-r--r--net/ipv4/ipmr.c2
-rw-r--r--net/ipv4/netfilter/nf_defrag_ipv4.c3
-rw-r--r--net/ipv4/netfilter/nf_nat_core.c97
-rw-r--r--net/ipv4/route.c14
-rw-r--r--net/ipv4/sysctl_net_ipv4.c18
-rw-r--r--net/ipv4/tcp_cong.c4
-rw-r--r--net/ipv4/udp.c2
16 files changed, 589 insertions, 230 deletions
diff --git a/net/ipv4/cipso_ipv4.c b/net/ipv4/cipso_ipv4.c
index 2c0e4572cc9..490e035c6d9 100644
--- a/net/ipv4/cipso_ipv4.c
+++ b/net/ipv4/cipso_ipv4.c
@@ -13,7 +13,7 @@
*/
/*
- * (c) Copyright Hewlett-Packard Development Company, L.P., 2006
+ * (c) Copyright Hewlett-Packard Development Company, L.P., 2006, 2008
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -47,17 +47,7 @@
#include <asm/bug.h>
#include <asm/unaligned.h>
-struct cipso_v4_domhsh_entry {
- char *domain;
- u32 valid;
- struct list_head list;
- struct rcu_head rcu;
-};
-
/* List of available DOI definitions */
-/* XXX - Updates should be minimal so having a single lock for the
- * cipso_v4_doi_list and the cipso_v4_doi_list->dom_list should be
- * okay. */
/* XXX - This currently assumes a minimal number of different DOIs in use,
* if in practice there are a lot of different DOIs this list should
* probably be turned into a hash table or something similar so we
@@ -119,6 +109,19 @@ int cipso_v4_rbm_strictvalid = 1;
* be omitted. */
#define CIPSO_V4_TAG_RNG_CAT_MAX 8
+/* Base length of the local tag (non-standard tag).
+ * Tag definition (may change between kernel versions)
+ *
+ * 0 8 16 24 32
+ * +----------+----------+----------+----------+
+ * | 10000000 | 00000110 | 32-bit secid value |
+ * +----------+----------+----------+----------+
+ * | in (host byte order)|
+ * +----------+----------+
+ *
+ */
+#define CIPSO_V4_TAG_LOC_BLEN 6
+
/*
* Helper Functions
*/
@@ -194,25 +197,6 @@ static void cipso_v4_bitmap_setbit(unsigned char *bitmap,
}
/**
- * cipso_v4_doi_domhsh_free - Frees a domain list entry
- * @entry: the entry's RCU field
- *
- * Description:
- * This function is designed to be used as a callback to the call_rcu()
- * function so that the memory allocated to a domain list entry can be released
- * safely.
- *
- */
-static void cipso_v4_doi_domhsh_free(struct rcu_head *entry)
-{
- struct cipso_v4_domhsh_entry *ptr;
-
- ptr = container_of(entry, struct cipso_v4_domhsh_entry, rcu);
- kfree(ptr->domain);
- kfree(ptr);
-}
-
-/**
* cipso_v4_cache_entry_free - Frees a cache entry
* @entry: the entry to free
*
@@ -457,7 +441,7 @@ static struct cipso_v4_doi *cipso_v4_doi_search(u32 doi)
struct cipso_v4_doi *iter;
list_for_each_entry_rcu(iter, &cipso_v4_doi_list, list)
- if (iter->doi == doi && iter->valid)
+ if (iter->doi == doi && atomic_read(&iter->refcount))
return iter;
return NULL;
}
@@ -496,14 +480,17 @@ int cipso_v4_doi_add(struct cipso_v4_doi *doi_def)
if (doi_def->type != CIPSO_V4_MAP_PASS)
return -EINVAL;
break;
+ case CIPSO_V4_TAG_LOCAL:
+ if (doi_def->type != CIPSO_V4_MAP_LOCAL)
+ return -EINVAL;
+ break;
default:
return -EINVAL;
}
}
- doi_def->valid = 1;
+ atomic_set(&doi_def->refcount, 1);
INIT_RCU_HEAD(&doi_def->rcu);
- INIT_LIST_HEAD(&doi_def->dom_list);
spin_lock(&cipso_v4_doi_list_lock);
if (cipso_v4_doi_search(doi_def->doi) != NULL)
@@ -519,59 +506,129 @@ doi_add_failure:
}
/**
+ * cipso_v4_doi_free - Frees a DOI definition
+ * @entry: the entry's RCU field
+ *
+ * Description:
+ * This function frees all of the memory associated with a DOI definition.
+ *
+ */
+void cipso_v4_doi_free(struct cipso_v4_doi *doi_def)
+{
+ if (doi_def == NULL)
+ return;
+
+ switch (doi_def->type) {
+ case CIPSO_V4_MAP_TRANS:
+ kfree(doi_def->map.std->lvl.cipso);
+ kfree(doi_def->map.std->lvl.local);
+ kfree(doi_def->map.std->cat.cipso);
+ kfree(doi_def->map.std->cat.local);
+ break;
+ }
+ kfree(doi_def);
+}
+
+/**
+ * cipso_v4_doi_free_rcu - Frees a DOI definition via the RCU pointer
+ * @entry: the entry's RCU field
+ *
+ * Description:
+ * This function is designed to be used as a callback to the call_rcu()
+ * function so that the memory allocated to the DOI definition can be released
+ * safely.
+ *
+ */
+static void cipso_v4_doi_free_rcu(struct rcu_head *entry)
+{
+ struct cipso_v4_doi *doi_def;
+
+ doi_def = container_of(entry, struct cipso_v4_doi, rcu);
+ cipso_v4_doi_free(doi_def);
+}
+
+/**
* cipso_v4_doi_remove - Remove an existing DOI from the CIPSO protocol engine
* @doi: the DOI value
* @audit_secid: the LSM secid to use in the audit message
- * @callback: the DOI cleanup/free callback
*
* Description:
- * Removes a DOI definition from the CIPSO engine, @callback is called to
- * free any memory. The NetLabel routines will be called to release their own
- * LSM domain mappings as well as our own domain list. Returns zero on
- * success and negative values on failure.
+ * Removes a DOI definition from the CIPSO engine. The NetLabel routines will
+ * be called to release their own LSM domain mappings as well as our own
+ * domain list. Returns zero on success and negative values on failure.
*
*/
-int cipso_v4_doi_remove(u32 doi,
- struct netlbl_audit *audit_info,
- void (*callback) (struct rcu_head * head))
+int cipso_v4_doi_remove(u32 doi, struct netlbl_audit *audit_info)
{
struct cipso_v4_doi *doi_def;
- struct cipso_v4_domhsh_entry *dom_iter;
spin_lock(&cipso_v4_doi_list_lock);
doi_def = cipso_v4_doi_search(doi);
- if (doi_def != NULL) {
- doi_def->valid = 0;
- list_del_rcu(&doi_def->list);
+ if (doi_def == NULL) {
spin_unlock(&cipso_v4_doi_list_lock);
- rcu_read_lock();
- list_for_each_entry_rcu(dom_iter, &doi_def->dom_list, list)
- if (dom_iter->valid)
- netlbl_cfg_map_del(dom_iter->domain,
- audit_info);
- rcu_read_unlock();
- cipso_v4_cache_invalidate();
- call_rcu(&doi_def->rcu, callback);
- return 0;
+ return -ENOENT;
+ }
+ if (!atomic_dec_and_test(&doi_def->refcount)) {
+ spin_unlock(&cipso_v4_doi_list_lock);
+ return -EBUSY;
}
+ list_del_rcu(&doi_def->list);
spin_unlock(&cipso_v4_doi_list_lock);
- return -ENOENT;
+ cipso_v4_cache_invalidate();
+ call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
+
+ return 0;
}
/**
- * cipso_v4_doi_getdef - Returns a pointer to a valid DOI definition
+ * cipso_v4_doi_getdef - Returns a reference to a valid DOI definition
* @doi: the DOI value
*
* Description:
* Searches for a valid DOI definition and if one is found it is returned to
* the caller. Otherwise NULL is returned. The caller must ensure that
- * rcu_read_lock() is held while accessing the returned definition.
+ * rcu_read_lock() is held while accessing the returned definition and the DOI
+ * definition reference count is decremented when the caller is done.
*
*/
struct cipso_v4_doi *cipso_v4_doi_getdef(u32 doi)
{
- return cipso_v4_doi_search(doi);
+ struct cipso_v4_doi *doi_def;
+
+ rcu_read_lock();
+ doi_def = cipso_v4_doi_search(doi);
+ if (doi_def == NULL)
+ goto doi_getdef_return;
+ if (!atomic_inc_not_zero(&doi_def->refcount))
+ doi_def = NULL;
+
+doi_getdef_return:
+ rcu_read_unlock();
+ return doi_def;
+}
+
+/**
+ * cipso_v4_doi_putdef - Releases a reference for the given DOI definition
+ * @doi_def: the DOI definition
+ *
+ * Description:
+ * Releases a DOI definition reference obtained from cipso_v4_doi_getdef().
+ *
+ */
+void cipso_v4_doi_putdef(struct cipso_v4_doi *doi_def)
+{
+ if (doi_def == NULL)
+ return;
+
+ if (!atomic_dec_and_test(&doi_def->refcount))
+ return;
+ spin_lock(&cipso_v4_doi_list_lock);
+ list_del_rcu(&doi_def->list);
+ spin_unlock(&cipso_v4_doi_list_lock);
+
+ cipso_v4_cache_invalidate();
+ call_rcu(&doi_def->rcu, cipso_v4_doi_free_rcu);
}
/**
@@ -597,7 +654,7 @@ int cipso_v4_doi_walk(u32 *skip_cnt,
rcu_read_lock();
list_for_each_entry_rcu(iter_doi, &cipso_v4_doi_list, list)
- if (iter_doi->valid) {
+ if (atomic_read(&iter_doi->refcount) > 0) {
if (doi_cnt++ < *skip_cnt)
continue;
ret_val = callback(iter_doi, cb_arg);
@@ -613,85 +670,6 @@ doi_walk_return:
return ret_val;
}
-/**
- * cipso_v4_doi_domhsh_add - Adds a domain entry to a DOI definition
- * @doi_def: the DOI definition
- * @domain: the domain to add
- *
- * Description:
- * Adds the @domain to the DOI specified by @doi_def, this function
- * should only be called by external functions (i.e. NetLabel). This function
- * does allocate memory. Returns zero on success, negative values on failure.
- *
- */
-int cipso_v4_doi_domhsh_add(struct cipso_v4_doi *doi_def, const char *domain)
-{
- struct cipso_v4_domhsh_entry *iter;
- struct cipso_v4_domhsh_entry *new_dom;
-
- new_dom = kzalloc(sizeof(*new_dom), GFP_KERNEL);
- if (new_dom == NULL)
- return -ENOMEM;
- if (domain) {
- new_dom->domain = kstrdup(domain, GFP_KERNEL);
- if (new_dom->domain == NULL) {
- kfree(new_dom);
- return -ENOMEM;
- }
- }
- new_dom->valid = 1;
- INIT_RCU_HEAD(&new_dom->rcu);
-
- spin_lock(&cipso_v4_doi_list_lock);
- list_for_each_entry(iter, &doi_def->dom_list, list)
- if (iter->valid &&
- ((domain != NULL && iter->domain != NULL &&
- strcmp(iter->domain, domain) == 0) ||
- (domain == NULL && iter->domain == NULL))) {
- spin_unlock(&cipso_v4_doi_list_lock);
- kfree(new_dom->domain);
- kfree(new_dom);
- return -EEXIST;
- }
- list_add_tail_rcu(&new_dom->list, &doi_def->dom_list);
- spin_unlock(&cipso_v4_doi_list_lock);
-
- return 0;
-}
-
-/**
- * cipso_v4_doi_domhsh_remove - Removes a domain entry from a DOI definition
- * @doi_def: the DOI definition
- * @domain: the domain to remove
- *
- * Description:
- * Removes the @domain from the DOI specified by @doi_def, this function
- * should only be called by external functions (i.e. NetLabel). Returns zero
- * on success and negative values on error.
- *
- */
-int cipso_v4_doi_domhsh_remove(struct cipso_v4_doi *doi_def,
- const char *domain)
-{
- struct cipso_v4_domhsh_entry *iter;
-
- spin_lock(&cipso_v4_doi_list_lock);
- list_for_each_entry(iter, &doi_def->dom_list, list)
- if (iter->valid &&
- ((domain != NULL && iter->domain != NULL &&
- strcmp(iter->domain, domain) == 0) ||
- (domain == NULL && iter->domain == NULL))) {
- iter->valid = 0;
- list_del_rcu(&iter->list);
- spin_unlock(&cipso_v4_doi_list_lock);
- call_rcu(&iter->rcu, cipso_v4_doi_domhsh_free);
- return 0;
- }
- spin_unlock(&cipso_v4_doi_list_lock);
-
- return -ENOENT;
-}
-
/*
* Label Mapping Functions
*/
@@ -712,7 +690,7 @@ static int cipso_v4_map_lvl_valid(const struct cipso_v4_doi *doi_def, u8 level)
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
return 0;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
if (doi_def->map.std->lvl.cipso[level] < CIPSO_V4_INV_LVL)
return 0;
break;
@@ -741,7 +719,7 @@ static int cipso_v4_map_lvl_hton(const struct cipso_v4_doi *doi_def,
case CIPSO_V4_MAP_PASS:
*net_lvl = host_lvl;
return 0;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
if (host_lvl < doi_def->map.std->lvl.local_size &&
doi_def->map.std->lvl.local[host_lvl] < CIPSO_V4_INV_LVL) {
*net_lvl = doi_def->map.std->lvl.local[host_lvl];
@@ -775,7 +753,7 @@ static int cipso_v4_map_lvl_ntoh(const struct cipso_v4_doi *doi_def,
case CIPSO_V4_MAP_PASS:
*host_lvl = net_lvl;
return 0;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
map_tbl = doi_def->map.std;
if (net_lvl < map_tbl->lvl.cipso_size &&
map_tbl->lvl.cipso[net_lvl] < CIPSO_V4_INV_LVL) {
@@ -812,7 +790,7 @@ static int cipso_v4_map_cat_rbm_valid(const struct cipso_v4_doi *doi_def,
switch (doi_def->type) {
case CIPSO_V4_MAP_PASS:
return 0;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
cipso_cat_size = doi_def->map.std->cat.cipso_size;
cipso_array = doi_def->map.std->cat.cipso;
for (;;) {
@@ -860,7 +838,7 @@ static int cipso_v4_map_cat_rbm_hton(const struct cipso_v4_doi *doi_def,
u32 host_cat_size = 0;
u32 *host_cat_array = NULL;
- if (doi_def->type == CIPSO_V4_MAP_STD) {
+ if (doi_def->type == CIPSO_V4_MAP_TRANS) {
host_cat_size = doi_def->map.std->cat.local_size;
host_cat_array = doi_def->map.std->cat.local;
}
@@ -875,7 +853,7 @@ static int cipso_v4_map_cat_rbm_hton(const struct cipso_v4_doi *doi_def,
case CIPSO_V4_MAP_PASS:
net_spot = host_spot;
break;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
if (host_spot >= host_cat_size)
return -EPERM;
net_spot = host_cat_array[host_spot];
@@ -921,7 +899,7 @@ static int cipso_v4_map_cat_rbm_ntoh(const struct cipso_v4_doi *doi_def,
u32 net_cat_size = 0;
u32 *net_cat_array = NULL;
- if (doi_def->type == CIPSO_V4_MAP_STD) {
+ if (doi_def->type == CIPSO_V4_MAP_TRANS) {
net_cat_size = doi_def->map.std->cat.cipso_size;
net_cat_array = doi_def->map.std->cat.cipso;
}
@@ -941,7 +919,7 @@ static int cipso_v4_map_cat_rbm_ntoh(const struct cipso_v4_doi *doi_def,
case CIPSO_V4_MAP_PASS:
host_spot = net_spot;
break;
- case CIPSO_V4_MAP_STD:
+ case CIPSO_V4_MAP_TRANS:
if (net_spot >= net_cat_size)
return -EPERM;
host_spot = net_cat_array[net_spot];
@@ -1277,7 +1255,7 @@ static int cipso_v4_gentag_rbm(const struct cipso_v4_doi *doi_def,
} else
tag_len = 4;
- buffer[0] = 0x01;
+ buffer[0] = CIPSO_V4_TAG_RBITMAP;
buffer[1] = tag_len;
buffer[3] = level;
@@ -1373,7 +1351,7 @@ static int cipso_v4_gentag_enum(const struct cipso_v4_doi *doi_def,
} else
tag_len = 4;
- buffer[0] = 0x02;
+ buffer[0] = CIPSO_V4_TAG_ENUM;
buffer[1] = tag_len;
buffer[3] = level;
@@ -1469,7 +1447,7 @@ static int cipso_v4_gentag_rng(const struct cipso_v4_doi *doi_def,
} else
tag_len = 4;
- buffer[0] = 0x05;
+ buffer[0] = CIPSO_V4_TAG_RANGE;
buffer[1] = tag_len;
buffer[3] = level;
@@ -1523,6 +1501,54 @@ static int cipso_v4_parsetag_rng(const struct cipso_v4_doi *doi_def,
}
/**
+ * cipso_v4_gentag_loc - Generate a CIPSO local tag (non-standard)
+ * @doi_def: the DOI definition
+ * @secattr: the security attributes
+ * @buffer: the option buffer
+ * @buffer_len: length of buffer in bytes
+ *
+ * Description:
+ * Generate a CIPSO option using the local tag. Returns the size of the tag
+ * on success, negative values on failure.
+ *
+ */
+static int cipso_v4_gentag_loc(const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr,
+ unsigned char *buffer,
+ u32 buffer_len)
+{
+ if (!(secattr->flags & NETLBL_SECATTR_SECID))
+ return -EPERM;
+
+ buffer[0] = CIPSO_V4_TAG_LOCAL;
+ buffer[1] = CIPSO_V4_TAG_LOC_BLEN;
+ *(u32 *)&buffer[2] = secattr->attr.secid;
+
+ return CIPSO_V4_TAG_LOC_BLEN;
+}
+
+/**
+ * cipso_v4_parsetag_loc - Parse a CIPSO local tag
+ * @doi_def: the DOI definition
+ * @tag: the CIPSO tag
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Parse a CIPSO local tag and return the security attributes in @secattr.
+ * Return zero on success, negatives values on failure.
+ *
+ */
+static int cipso_v4_parsetag_loc(const struct cipso_v4_doi *doi_def,
+ const unsigned char *tag,
+ struct netlbl_lsm_secattr *secattr)
+{
+ secattr->attr.secid = *(u32 *)&tag[2];
+ secattr->flags |= NETLBL_SECATTR_SECID;
+
+ return 0;
+}
+
+/**
* cipso_v4_validate - Validate a CIPSO option
* @option: the start of the option, on error it is set to point to the error
*
@@ -1541,7 +1567,7 @@ static int cipso_v4_parsetag_rng(const struct cipso_v4_doi *doi_def,
* that is unrecognized."
*
*/
-int cipso_v4_validate(unsigned char **option)
+int cipso_v4_validate(const struct sk_buff *skb, unsigned char **option)
{
unsigned char *opt = *option;
unsigned char *tag;
@@ -1566,7 +1592,7 @@ int cipso_v4_validate(unsigned char **option)
goto validate_return_locked;
}
- opt_iter = 6;
+ opt_iter = CIPSO_V4_HDR_LEN;
tag = opt + opt_iter;
while (opt_iter < opt_len) {
for (tag_iter = 0; doi_def->tags[tag_iter] != tag[0];)
@@ -1584,7 +1610,7 @@ int cipso_v4_validate(unsigned char **option)
switch (tag[0]) {
case CIPSO_V4_TAG_RBITMAP:
- if (tag_len < 4) {
+ if (tag_len < CIPSO_V4_TAG_RBM_BLEN) {
err_offset = opt_iter + 1;
goto validate_return_locked;
}
@@ -1602,7 +1628,7 @@ int cipso_v4_validate(unsigned char **option)
err_offset = opt_iter + 3;
goto validate_return_locked;
}
- if (tag_len > 4 &&
+ if (tag_len > CIPSO_V4_TAG_RBM_BLEN &&
cipso_v4_map_cat_rbm_valid(doi_def,
&tag[4],
tag_len - 4) < 0) {
@@ -1612,7 +1638,7 @@ int cipso_v4_validate(unsigned char **option)
}
break;
case CIPSO_V4_TAG_ENUM:
- if (tag_len < 4) {
+ if (tag_len < CIPSO_V4_TAG_ENUM_BLEN) {
err_offset = opt_iter + 1;
goto validate_return_locked;
}
@@ -1622,7 +1648,7 @@ int cipso_v4_validate(unsigned char **option)
err_offset = opt_iter + 3;
goto validate_return_locked;
}
- if (tag_len > 4 &&
+ if (tag_len > CIPSO_V4_TAG_ENUM_BLEN &&
cipso_v4_map_cat_enum_valid(doi_def,
&tag[4],
tag_len - 4) < 0) {
@@ -1631,7 +1657,7 @@ int cipso_v4_validate(unsigned char **option)
}
break;
case CIPSO_V4_TAG_RANGE:
- if (tag_len < 4) {
+ if (tag_len < CIPSO_V4_TAG_RNG_BLEN) {
err_offset = opt_iter + 1;
goto validate_return_locked;
}
@@ -1641,7 +1667,7 @@ int cipso_v4_validate(unsigned char **option)
err_offset = opt_iter + 3;
goto validate_return_locked;
}
- if (tag_len > 4 &&
+ if (tag_len > CIPSO_V4_TAG_RNG_BLEN &&
cipso_v4_map_cat_rng_valid(doi_def,
&tag[4],
tag_len - 4) < 0) {
@@ -1649,6 +1675,19 @@ int cipso_v4_validate(unsigned char **option)
goto validate_return_locked;
}
break;
+ case CIPSO_V4_TAG_LOCAL:
+ /* This is a non-standard tag that we only allow for
+ * local connections, so if the incoming interface is
+ * not the loopback device drop the packet. */
+ if (!(skb->dev->flags & IFF_LOOPBACK)) {
+ err_offset = opt_iter;
+ goto validate_return_locked;
+ }
+ if (tag_len != CIPSO_V4_TAG_LOC_BLEN) {
+ err_offset = opt_iter + 1;
+ goto validate_return_locked;
+ }
+ break;
default:
err_offset = opt_iter;
goto validate_return_locked;
@@ -1704,48 +1743,27 @@ void cipso_v4_error(struct sk_buff *skb, int error, u32 gateway)
}
/**
- * cipso_v4_sock_setattr - Add a CIPSO option to a socket
- * @sk: the socket
+ * cipso_v4_genopt - Generate a CIPSO option
+ * @buf: the option buffer
+ * @buf_len: the size of opt_buf
* @doi_def: the CIPSO DOI to use
- * @secattr: the specific security attributes of the socket
+ * @secattr: the security attributes
*
* Description:
- * Set the CIPSO option on the given socket using the DOI definition and
- * security attributes passed to the function. This function requires
- * exclusive access to @sk, which means it either needs to be in the
- * process of being created or locked. Returns zero on success and negative
- * values on failure.
+ * Generate a CIPSO option using the DOI definition and security attributes
+ * passed to the function. Returns the length of the option on success and
+ * negative values on failure.
*
*/
-int cipso_v4_sock_setattr(struct sock *sk,
- const struct cipso_v4_doi *doi_def,
- const struct netlbl_lsm_secattr *secattr)
+static int cipso_v4_genopt(unsigned char *buf, u32 buf_len,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
{
- int ret_val = -EPERM;
+ int ret_val;
u32 iter;
- unsigned char *buf;
- u32 buf_len = 0;
- u32 opt_len;
- struct ip_options *opt = NULL;
- struct inet_sock *sk_inet;
- struct inet_connection_sock *sk_conn;
- /* In the case of sock_create_lite(), the sock->sk field is not
- * defined yet but it is not a problem as the only users of these
- * "lite" PF_INET sockets are functions which do an accept() call
- * afterwards so we will label the socket as part of the accept(). */
- if (sk == NULL)
- return 0;
-
- /* We allocate the maximum CIPSO option size here so we are probably
- * being a little wasteful, but it makes our life _much_ easier later
- * on and after all we are only talking about 40 bytes. */
- buf_len = CIPSO_V4_OPT_LEN_MAX;
- buf = kmalloc(buf_len, GFP_ATOMIC);
- if (buf == NULL) {
- ret_val = -ENOMEM;
- goto socket_setattr_failure;
- }
+ if (buf_len <= CIPSO_V4_HDR_LEN)
+ return -ENOSPC;
/* XXX - This code assumes only one tag per CIPSO option which isn't
* really a good assumption to make but since we only support the MAC
@@ -1772,9 +1790,14 @@ int cipso_v4_sock_setattr(struct sock *sk,
&buf[CIPSO_V4_HDR_LEN],
buf_len - CIPSO_V4_HDR_LEN);
break;
+ case CIPSO_V4_TAG_LOCAL:
+ ret_val = cipso_v4_gentag_loc(doi_def,
+ secattr,
+ &buf[CIPSO_V4_HDR_LEN],
+ buf_len - CIPSO_V4_HDR_LEN);
+ break;
default:
- ret_val = -EPERM;
- goto socket_setattr_failure;
+ return -EPERM;
}
iter++;
@@ -1782,9 +1805,58 @@ int cipso_v4_sock_setattr(struct sock *sk,
iter < CIPSO_V4_TAG_MAXCNT &&
doi_def->tags[iter] != CIPSO_V4_TAG_INVALID);
if (ret_val < 0)
- goto socket_setattr_failure;
+ return ret_val;
cipso_v4_gentag_hdr(doi_def, buf, ret_val);
- buf_len = CIPSO_V4_HDR_LEN + ret_val;
+ return CIPSO_V4_HDR_LEN + ret_val;
+}
+
+/**
+ * cipso_v4_sock_setattr - Add a CIPSO option to a socket
+ * @sk: the socket
+ * @doi_def: the CIPSO DOI to use
+ * @secattr: the specific security attributes of the socket
+ *
+ * Description:
+ * Set the CIPSO option on the given socket using the DOI definition and
+ * security attributes passed to the function. This function requires
+ * exclusive access to @sk, which means it either needs to be in the
+ * process of being created or locked. Returns zero on success and negative
+ * values on failure.
+ *
+ */
+int cipso_v4_sock_setattr(struct sock *sk,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val = -EPERM;
+ unsigned char *buf = NULL;
+ u32 buf_len;
+ u32 opt_len;
+ struct ip_options *opt = NULL;
+ struct inet_sock *sk_inet;
+ struct inet_connection_sock *sk_conn;
+
+ /* In the case of sock_create_lite(), the sock->sk field is not
+ * defined yet but it is not a problem as the only users of these
+ * "lite" PF_INET sockets are functions which do an accept() call
+ * afterwards so we will label the socket as part of the accept(). */
+ if (sk == NULL)
+ return 0;
+
+ /* We allocate the maximum CIPSO option size here so we are probably
+ * being a little wasteful, but it makes our life _much_ easier later
+ * on and after all we are only talking about 40 bytes. */
+ buf_len = CIPSO_V4_OPT_LEN_MAX;
+ buf = kmalloc(buf_len, GFP_ATOMIC);
+ if (buf == NULL) {
+ ret_val = -ENOMEM;
+ goto socket_setattr_failure;
+ }
+
+ ret_val = cipso_v4_genopt(buf, buf_len, doi_def, secattr);
+ if (ret_val < 0)
+ goto socket_setattr_failure;
+ buf_len = ret_val;
/* We can't use ip_options_get() directly because it makes a call to
* ip_options_get_alloc() which allocates memory with GFP_KERNEL and
@@ -1822,6 +1894,80 @@ socket_setattr_failure:
}
/**
+ * cipso_v4_sock_delattr - Delete the CIPSO option from a socket
+ * @sk: the socket
+ *
+ * Description:
+ * Removes the CIPSO option from a socket, if present.
+ *
+ */
+void cipso_v4_sock_delattr(struct sock *sk)
+{
+ u8 hdr_delta;
+ struct ip_options *opt;
+ struct inet_sock *sk_inet;
+
+ sk_inet = inet_sk(sk);
+ opt = sk_inet->opt;
+ if (opt == NULL || opt->cipso == 0)
+ return;
+
+ if (opt->srr || opt->rr || opt->ts || opt->router_alert) {
+ u8 cipso_len;
+ u8 cipso_off;
+ unsigned char *cipso_ptr;
+ int iter;
+ int optlen_new;
+
+ cipso_off = opt->cipso - sizeof(struct iphdr);
+ cipso_ptr = &opt->__data[cipso_off];
+ cipso_len = cipso_ptr[1];
+
+ if (opt->srr > opt->cipso)
+ opt->srr -= cipso_len;
+ if (opt->rr > opt->cipso)
+ opt->rr -= cipso_len;
+ if (opt->ts > opt->cipso)
+ opt->ts -= cipso_len;
+ if (opt->router_alert > opt->cipso)
+ opt->router_alert -= cipso_len;
+ opt->cipso = 0;
+
+ memmove(cipso_ptr, cipso_ptr + cipso_len,
+ opt->optlen - cipso_off - cipso_len);
+
+ /* determining the new total option length is tricky because of
+ * the padding necessary, the only thing i can think to do at
+ * this point is walk the options one-by-one, skipping the
+ * padding at the end to determine the actual option size and
+ * from there we can determine the new total option length */
+ iter = 0;
+ optlen_new = 0;
+ while (iter < opt->optlen)
+ if (opt->__data[iter] != IPOPT_NOP) {
+ iter += opt->__data[iter + 1];
+ optlen_new = iter;
+ } else
+ iter++;
+ hdr_delta = opt->optlen;
+ opt->optlen = (optlen_new + 3) & ~3;
+ hdr_delta -= opt->optlen;
+ } else {
+ /* only the cipso option was present on the socket so we can
+ * remove the entire option struct */
+ sk_inet->opt = NULL;
+ hdr_delta = opt->optlen;
+ kfree(opt);
+ }
+
+ if (sk_inet->is_icsk && hdr_delta > 0) {
+ struct inet_connection_sock *sk_conn = inet_csk(sk);
+ sk_conn->icsk_ext_hdr_len -= hdr_delta;
+ sk_conn->icsk_sync_mss(sk, sk_conn->icsk_pmtu_cookie);
+ }
+}
+
+/**
* cipso_v4_getattr - Helper function for the cipso_v4_*_getattr functions
* @cipso: the CIPSO v4 option
* @secattr: the security attributes
@@ -1859,6 +2005,9 @@ static int cipso_v4_getattr(const unsigned char *cipso,
case CIPSO_V4_TAG_RANGE:
ret_val = cipso_v4_parsetag_rng(doi_def, &cipso[6], secattr);
break;
+ case CIPSO_V4_TAG_LOCAL:
+ ret_val = cipso_v4_parsetag_loc(doi_def, &cipso[6], secattr);
+ break;
}
if (ret_val == 0)
secattr->type = NETLBL_NLTYPE_CIPSOV4;
@@ -1893,6 +2042,123 @@ int cipso_v4_sock_getattr(struct sock *sk, struct netlbl_lsm_secattr *secattr)
}
/**
+ * cipso_v4_skbuff_setattr - Set the CIPSO option on a packet
+ * @skb: the packet
+ * @secattr: the security attributes
+ *
+ * Description:
+ * Set the CIPSO option on the given packet based on the security attributes.
+ * Returns a pointer to the IP header on success and NULL on failure.
+ *
+ */
+int cipso_v4_skbuff_setattr(struct sk_buff *skb,
+ const struct cipso_v4_doi *doi_def,
+ const struct netlbl_lsm_secattr *secattr)
+{
+ int ret_val;
+ struct iphdr *iph;
+ struct ip_options *opt = &IPCB(skb)->opt;
+ unsigned char buf[CIPSO_V4_OPT_LEN_MAX];
+ u32 buf_len = CIPSO_V4_OPT_LEN_MAX;
+ u32 opt_len;
+ int len_delta;
+
+ buf_len = cipso_v4_genopt(buf, buf_len, doi_def, secattr);
+ if (buf_len < 0)
+ return buf_len;
+ opt_len = (buf_len + 3) & ~3;
+
+ /* we overwrite any existing options to ensure that we have enough
+ * room for the CIPSO option, the reason is that we _need_ to guarantee
+ * that the security label is applied to the packet - we do the same
+ * thing when using the socket options and it hasn't caused a problem,
+ * if we need to we can always revisit this choice later */
+
+ len_delta = opt_len - opt->optlen;
+ /* if we don't ensure enough headroom we could panic on the skb_push()
+ * call below so make sure we have enough, we are also "mangling" the
+ * packet so we should probably do a copy-on-write call anyway */
+ ret_val = skb_cow(skb, skb_headroom(skb) + len_delta);
+ if (ret_val < 0)
+ return ret_val;
+
+ if (len_delta > 0) {
+ /* we assume that the header + opt->optlen have already been
+ * "pushed" in ip_options_build() or similar */
+ iph = ip_hdr(skb);
+ skb_push(skb, len_delta);
+ memmove((char *)iph - len_delta, iph, iph->ihl << 2);
+ skb_reset_network_header(skb);
+ iph = ip_hdr(skb);
+ } else if (len_delta < 0) {
+ iph = ip_hdr(skb);
+ memset(iph + 1, IPOPT_NOP, opt->optlen);
+ } else
+ iph = ip_hdr(skb);
+
+ if (opt->optlen > 0)
+ memset(opt, 0, sizeof(*opt));
+ opt->optlen = opt_len;
+ opt->cipso = sizeof(struct iphdr);
+ opt->is_changed = 1;
+
+ /* we have to do the following because we are being called from a
+ * netfilter hook which means the packet already has had the header
+ * fields populated and the checksum calculated - yes this means we
+ * are doing more work than needed but we do it to keep the core
+ * stack clean and tidy */
+ memcpy(iph + 1, buf, buf_len);
+ if (opt_len > buf_len)
+ memset((char *)(iph + 1) + buf_len, 0, opt_len - buf_len);
+ if (len_delta != 0) {
+ iph->ihl = 5 + (opt_len >> 2);
+ iph->tot_len = htons(skb->len);
+ }
+ ip_send_check(iph);
+
+ return 0;
+}
+
+/**
+ * cipso_v4_skbuff_delattr - Delete any CIPSO options from a packet
+ * @skb: the packet
+ *
+ * Description:
+ * Removes any and all CIPSO options from the given packet. Returns zero on
+ * success, negative values on failure.
+ *
+ */
+int cipso_v4_skbuff_delattr(struct sk_buff *skb)
+{
+ int ret_val;
+ struct iphdr *iph;
+ struct ip_options *opt = &IPCB(skb)->opt;
+ unsigned char *cipso_ptr;
+
+ if (opt->cipso == 0)
+ return 0;
+
+ /* since we are changing the packet we should make a copy */
+ ret_val = skb_cow(skb, skb_headroom(skb));
+ if (ret_val < 0)
+ return ret_val;
+
+ /* the easiest thing to do is just replace the cipso option with noop
+ * options since we don't change the size of the packet, although we
+ * still need to recalculate the checksum */
+
+ iph = ip_hdr(skb);
+ cipso_ptr = (unsigned char *)iph + opt->cipso;
+ memset(cipso_ptr, IPOPT_NOOP, cipso_ptr[1]);
+ opt->cipso = 0;
+ opt->is_changed = 1;
+
+ ip_send_check(iph);
+
+ return 0;
+}
+
+/**
* cipso_v4_skbuff_getattr - Get the security attributes from the CIPSO option
* @skb: the packet
* @secattr: the security attributes
diff --git a/net/ipv4/devinet.c b/net/ipv4/devinet.c
index b12dae2b0b2..56fce3ab6c5 100644
--- a/net/ipv4/devinet.c
+++ b/net/ipv4/devinet.c
@@ -613,9 +613,7 @@ int devinet_ioctl(struct net *net, unsigned int cmd, void __user *arg)
if (colon)
*colon = 0;
-#ifdef CONFIG_KMOD
dev_load(net, ifr.ifr_name);
-#endif
switch (cmd) {
case SIOCGIFADDR: /* Get interface address */
@@ -1283,7 +1281,7 @@ static int devinet_conf_proc(ctl_table *ctl, int write,
return ret;
}
-static int devinet_conf_sysctl(ctl_table *table, int __user *name, int nlen,
+static int devinet_conf_sysctl(ctl_table *table,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
@@ -1379,12 +1377,11 @@ int ipv4_doint_and_flush(ctl_table *ctl, int write,
return ret;
}
-int ipv4_doint_and_flush_strategy(ctl_table *table, int __user *name, int nlen,
+int ipv4_doint_and_flush_strategy(ctl_table *table,
void __user *oldval, size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
- int ret = devinet_conf_sysctl(table, name, nlen, oldval, oldlenp,
- newval, newlen);
+ int ret = devinet_conf_sysctl(table, oldval, oldlenp, newval, newlen);
struct net *net = table->extra2;
if (ret == 1)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 55c355e6323..72b2de76f1c 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -1,7 +1,7 @@
/*
* NET3: Implementation of the ICMP protocol layer.
*
- * Alan Cox, <alan@redhat.com>
+ * Alan Cox, <alan@lxorguk.ukuu.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 7f9e337e390..a0d86455c53 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -9,7 +9,7 @@
* seems to fall out with gcc 2.6.2.
*
* Authors:
- * Alan Cox <Alan.Cox@linux.org>
+ * Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
diff --git a/net/ipv4/inet_diag.c b/net/ipv4/inet_diag.c
index 89cb047ab31..564230dabcb 100644
--- a/net/ipv4/inet_diag.c
+++ b/net/ipv4/inet_diag.c
@@ -53,11 +53,9 @@ static DEFINE_MUTEX(inet_diag_table_mutex);
static const struct inet_diag_handler *inet_diag_lock_handler(int type)
{
-#ifdef CONFIG_KMOD
if (!inet_diag_table[type])
request_module("net-pf-%d-proto-%d-type-%d", PF_NETLINK,
NETLINK_INET_DIAG, type);
-#endif
mutex_lock(&inet_diag_table_mutex);
if (!inet_diag_table[type])
diff --git a/net/ipv4/ip_fragment.c b/net/ipv4/ip_fragment.c
index 2152d222b95..e4f81f54bef 100644
--- a/net/ipv4/ip_fragment.c
+++ b/net/ipv4/ip_fragment.c
@@ -6,7 +6,7 @@
* The IP fragmentation functionality.
*
* Authors: Fred N. van Kempen <waltje@uWalt.NL.Mugnet.ORG>
- * Alan Cox <Alan.Cox@linux.org>
+ * Alan Cox <alan@lxorguk.ukuu.org.uk>
*
* Fixes:
* Alan Cox : Split from ip.c , see ip_input.c for history.
diff --git a/net/ipv4/ip_input.c b/net/ipv4/ip_input.c
index e0bed56c51f..861978a4f1a 100644
--- a/net/ipv4/ip_input.c
+++ b/net/ipv4/ip_input.c
@@ -8,7 +8,7 @@
* Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Donald Becker, <becker@super.org>
- * Alan Cox, <Alan.Cox@linux.org>
+ * Alan Cox, <alan@lxorguk.ukuu.org.uk>
* Richard Underwood
* Stefan Becker, <stefanb@yello.ping.de>
* Jorge Cwik, <jorge@laser.satlink.net>
diff --git a/net/ipv4/ip_options.c b/net/ipv4/ip_options.c
index be3f18a7a40..2c88da6e786 100644
--- a/net/ipv4/ip_options.c
+++ b/net/ipv4/ip_options.c
@@ -438,7 +438,7 @@ int ip_options_compile(struct net *net,
goto error;
}
opt->cipso = optptr - iph;
- if (cipso_v4_validate(&optptr)) {
+ if (cipso_v4_validate(skb, &optptr)) {
pp_ptr = optptr;
goto error;
}
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 4c6d2caf920..29609d29df7 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -41,7 +41,7 @@
Made the tunnels use dev->name not tunnel: when error reporting.
Added tx_dropped stat
- -Alan Cox (Alan.Cox@linux.org) 21 March 95
+ -Alan Cox (alan@lxorguk.ukuu.org.uk) 21 March 95
Reworked:
Changed to tunnel to destination gateway in addition to the
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index c519b8d30ee..b42e082cc17 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -1,7 +1,7 @@
/*
* IP multicast routing support for mrouted 3.6/3.8
*
- * (c) 1995 Alan Cox, <alan@redhat.com>
+ * (c) 1995 Alan Cox, <alan@lxorguk.ukuu.org.uk>
* Linux Consultancy and Custom Driver Development
*
* This program is free software; you can redistribute it and/or
diff --git a/net/ipv4/netfilter/nf_defrag_ipv4.c b/net/ipv4/netfilter/nf_defrag_ipv4.c
index aa2c50a180f..fa2d6b6fc3e 100644
--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
+++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
@@ -41,12 +41,13 @@ static unsigned int ipv4_conntrack_defrag(unsigned int hooknum,
int (*okfn)(struct sk_buff *))
{
#if defined(CONFIG_NF_CONNTRACK) || defined(CONFIG_NF_CONNTRACK_MODULE)
+#if !defined(CONFIG_NF_NAT) && !defined(CONFIG_NF_NAT_MODULE)
/* Previously seen (loopback)? Ignore. Do this before
fragment check. */
if (skb->nfct)
return NF_ACCEPT;
#endif
-
+#endif
/* Gather fragments. */
if (ip_hdr(skb)->frag_off & htons(IP_MF | IP_OFFSET)) {
if (nf_ct_ipv4_gather_frags(skb,
diff --git a/net/ipv4/netfilter/nf_nat_core.c b/net/ipv4/netfilter/nf_nat_core.c
index 2ac9eaf1a8c..a65cf692359 100644
--- a/net/ipv4/netfilter/nf_nat_core.c
+++ b/net/ipv4/netfilter/nf_nat_core.c
@@ -584,6 +584,98 @@ static struct nf_ct_ext_type nat_extend __read_mostly = {
.flags = NF_CT_EXT_F_PREALLOC,
};
+#if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
+
+#include <linux/netfilter/nfnetlink.h>
+#include <linux/netfilter/nfnetlink_conntrack.h>
+
+static const struct nla_policy protonat_nla_policy[CTA_PROTONAT_MAX+1] = {
+ [CTA_PROTONAT_PORT_MIN] = { .type = NLA_U16 },
+ [CTA_PROTONAT_PORT_MAX] = { .type = NLA_U16 },
+};
+
+static int nfnetlink_parse_nat_proto(struct nlattr *attr,
+ const struct nf_conn *ct,
+ struct nf_nat_range *range)
+{
+ struct nlattr *tb[CTA_PROTONAT_MAX+1];
+ const struct nf_nat_protocol *npt;
+ int err;
+
+ err = nla_parse_nested(tb, CTA_PROTONAT_MAX, attr, protonat_nla_policy);
+ if (err < 0)
+ return err;
+
+ npt = nf_nat_proto_find_get(nf_ct_protonum(ct));
+ if (npt->nlattr_to_range)
+ err = npt->nlattr_to_range(tb, range);
+ nf_nat_proto_put(npt);
+ return err;
+}
+
+static const struct nla_policy nat_nla_policy[CTA_NAT_MAX+1] = {
+ [CTA_NAT_MINIP] = { .type = NLA_U32 },
+ [CTA_NAT_MAXIP] = { .type = NLA_U32 },
+};
+
+static int
+nfnetlink_parse_nat(struct nlattr *nat,
+ const struct nf_conn *ct, struct nf_nat_range *range)
+{
+ struct nlattr *tb[CTA_NAT_MAX+1];
+ int err;
+
+ memset(range, 0, sizeof(*range));
+
+ err = nla_parse_nested(tb, CTA_NAT_MAX, nat, nat_nla_policy);
+ if (err < 0)
+ return err;
+
+ if (tb[CTA_NAT_MINIP])
+ range->min_ip = nla_get_be32(tb[CTA_NAT_MINIP]);
+
+ if (!tb[CTA_NAT_MAXIP])
+ range->max_ip = range->min_ip;
+ else
+ range->max_ip = nla_get_be32(tb[CTA_NAT_MAXIP]);
+
+ if (range->min_ip)
+ range->flags |= IP_NAT_RANGE_MAP_IPS;
+
+ if (!tb[CTA_NAT_PROTO])
+ return 0;
+
+ err = nfnetlink_parse_nat_proto(tb[CTA_NAT_PROTO], ct, range);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static int
+nfnetlink_parse_nat_setup(struct nf_conn *ct,
+ enum nf_nat_manip_type manip,
+ struct nlattr *attr)
+{
+ struct nf_nat_range range;
+
+ if (nfnetlink_parse_nat(attr, ct, &range) < 0)
+ return -EINVAL;
+ if (nf_nat_initialized(ct, manip))
+ return -EEXIST;
+
+ return nf_nat_setup_info(ct, &range, manip);
+}
+#else
+static int
+nfnetlink_parse_nat_setup(struct nf_conn *ct,
+ enum nf_nat_manip_type manip,
+ struct nlattr *attr)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
static int __net_init nf_nat_net_init(struct net *net)
{
net->ipv4.nat_bysource = nf_ct_alloc_hashtable(&nf_nat_htable_size,
@@ -654,6 +746,9 @@ static int __init nf_nat_init(void)
BUG_ON(nf_nat_seq_adjust_hook != NULL);
rcu_assign_pointer(nf_nat_seq_adjust_hook, nf_nat_seq_adjust);
+ BUG_ON(nfnetlink_parse_nat_setup_hook != NULL);
+ rcu_assign_pointer(nfnetlink_parse_nat_setup_hook,
+ nfnetlink_parse_nat_setup);
return 0;
cleanup_extend:
@@ -667,10 +762,12 @@ static void __exit nf_nat_cleanup(void)
nf_ct_l3proto_put(l3proto);
nf_ct_extend_unregister(&nat_extend);
rcu_assign_pointer(nf_nat_seq_adjust_hook, NULL);
+ rcu_assign_pointer(nfnetlink_parse_nat_setup_hook, NULL);
synchronize_net();
}
MODULE_LICENSE("GPL");
+MODULE_ALIAS("nf-nat-ipv4");
module_init(nf_nat_init);
module_exit(nf_nat_cleanup);
diff --git a/net/ipv4/route.c b/net/ipv4/route.c
index a6d7c584f53..2ea6dcc3e2c 100644
--- a/net/ipv4/route.c
+++ b/net/ipv4/route.c
@@ -1109,7 +1109,12 @@ restart:
printk("\n");
}
#endif
- rt_hash_table[hash].chain = rt;
+ /*
+ * Since lookup is lockfree, we must make sure
+ * previous writes to rt are comitted to memory
+ * before making rt visible to other CPUS.
+ */
+ rcu_assign_pointer(rt_hash_table[hash].chain, rt);
spin_unlock_bh(rt_hash_lock_addr(hash));
*rp = rt;
return 0;
@@ -2908,8 +2913,6 @@ static int ipv4_sysctl_rtcache_flush(ctl_table *__ctl, int write,
}
static int ipv4_sysctl_rtcache_flush_strategy(ctl_table *table,
- int __user *name,
- int nlen,
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
@@ -2972,16 +2975,13 @@ static int ipv4_sysctl_rt_secret_interval(ctl_table *ctl, int write,
}
static int ipv4_sysctl_rt_secret_interval_strategy(ctl_table *table,
- int __user *name,
- int nlen,
void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
size_t newlen)
{
int old = ip_rt_secret_interval;
- int ret = sysctl_jiffies(table, name, nlen, oldval, oldlenp, newval,
- newlen);
+ int ret = sysctl_jiffies(table, oldval, oldlenp, newval, newlen);
rt_secret_reschedule(old);
diff --git a/net/ipv4/sysctl_net_ipv4.c b/net/ipv4/sysctl_net_ipv4.c
index 276d047fb85..1bb10df8ce7 100644
--- a/net/ipv4/sysctl_net_ipv4.c
+++ b/net/ipv4/sysctl_net_ipv4.c
@@ -64,8 +64,8 @@ static int ipv4_local_port_range(ctl_table *table, int write, struct file *filp,
}
/* Validate changes from sysctl interface. */
-static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
- int nlen, void __user *oldval,
+static int ipv4_sysctl_local_port_range(ctl_table *table,
+ void __user *oldval,
size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
@@ -80,7 +80,7 @@ static int ipv4_sysctl_local_port_range(ctl_table *table, int __user *name,
};
inet_get_local_port_range(range, range + 1);
- ret = sysctl_intvec(&tmp, name, nlen, oldval, oldlenp, newval, newlen);
+ ret = sysctl_intvec(&tmp, oldval, oldlenp, newval, newlen);
if (ret == 0 && newval && newlen) {
if (range[1] < range[0])
ret = -EINVAL;
@@ -109,8 +109,8 @@ static int proc_tcp_congestion_control(ctl_table *ctl, int write, struct file *
return ret;
}
-static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
- int nlen, void __user *oldval,
+static int sysctl_tcp_congestion_control(ctl_table *table,
+ void __user *oldval,
size_t __user *oldlenp,
void __user *newval, size_t newlen)
{
@@ -122,7 +122,7 @@ static int sysctl_tcp_congestion_control(ctl_table *table, int __user *name,
int ret;
tcp_get_default_congestion_control(val);
- ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
+ ret = sysctl_string(&tbl, oldval, oldlenp, newval, newlen);
if (ret == 1 && newval && newlen)
ret = tcp_set_default_congestion_control(val);
return ret;
@@ -165,8 +165,8 @@ static int proc_allowed_congestion_control(ctl_table *ctl,
return ret;
}
-static int strategy_allowed_congestion_control(ctl_table *table, int __user *name,
- int nlen, void __user *oldval,
+static int strategy_allowed_congestion_control(ctl_table *table,
+ void __user *oldval,
size_t __user *oldlenp,
void __user *newval,
size_t newlen)
@@ -179,7 +179,7 @@ static int strategy_allowed_congestion_control(ctl_table *table, int __user *nam
return -ENOMEM;
tcp_get_available_congestion_control(tbl.data, tbl.maxlen);
- ret = sysctl_string(&tbl, name, nlen, oldval, oldlenp, newval, newlen);
+ ret = sysctl_string(&tbl, oldval, oldlenp, newval, newlen);
if (ret == 1 && newval && newlen)
ret = tcp_set_allowed_congestion_control(tbl.data);
kfree(tbl.data);
diff --git a/net/ipv4/tcp_cong.c b/net/ipv4/tcp_cong.c
index 6a250828b76..4ec5b4e97c4 100644
--- a/net/ipv4/tcp_cong.c
+++ b/net/ipv4/tcp_cong.c
@@ -115,7 +115,7 @@ int tcp_set_default_congestion_control(const char *name)
spin_lock(&tcp_cong_list_lock);
ca = tcp_ca_find(name);
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
if (!ca && capable(CAP_SYS_MODULE)) {
spin_unlock(&tcp_cong_list_lock);
@@ -244,7 +244,7 @@ int tcp_set_congestion_control(struct sock *sk, const char *name)
if (ca == icsk->icsk_ca_ops)
goto out;
-#ifdef CONFIG_KMOD
+#ifdef CONFIG_MODULES
/* not found attempt to autoload module */
if (!ca && capable(CAP_SYS_MODULE)) {
rcu_read_unlock();
diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c
index eacf4cfef14..2095abc3cab 100644
--- a/net/ipv4/udp.c
+++ b/net/ipv4/udp.c
@@ -8,7 +8,7 @@
* Authors: Ross Biro
* Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG>
* Arnt Gulbrandsen, <agulbra@nvg.unit.no>
- * Alan Cox, <Alan.Cox@linux.org>
+ * Alan Cox, <alan@lxorguk.ukuu.org.uk>
* Hirokazu Takahashi, <taka@valinux.co.jp>
*
* Fixes:
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-23 05:10:47 +0000