diff options
| -rw-r--r-- | net/dccp/ccids/lib/packet_history.c | 219 |
1 files changed, 112 insertions, 107 deletions
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c index b876c9c81c65..2e8ef42721e2 100644 --- a/net/dccp/ccids/lib/packet_history.c +++ b/net/dccp/ccids/lib/packet_history.c | |||
| @@ -36,9 +36,100 @@ | |||
| 36 | 36 | ||
| 37 | #include <linux/module.h> | 37 | #include <linux/module.h> |
| 38 | #include <linux/string.h> | 38 | #include <linux/string.h> |
| 39 | |||
| 40 | #include "packet_history.h" | 39 | #include "packet_history.h" |
| 41 | 40 | ||
| 41 | /* | ||
| 42 | * Transmitter History Routines | ||
| 43 | */ | ||
| 44 | struct dccp_tx_hist *dccp_tx_hist_new(const char *name) | ||
| 45 | { | ||
| 46 | struct dccp_tx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC); | ||
| 47 | static const char dccp_tx_hist_mask[] = "tx_hist_%s"; | ||
| 48 | char *slab_name; | ||
| 49 | |||
| 50 | if (hist == NULL) | ||
| 51 | goto out; | ||
| 52 | |||
| 53 | slab_name = kmalloc(strlen(name) + sizeof(dccp_tx_hist_mask) - 1, | ||
| 54 | GFP_ATOMIC); | ||
| 55 | if (slab_name == NULL) | ||
| 56 | goto out_free_hist; | ||
| 57 | |||
| 58 | sprintf(slab_name, dccp_tx_hist_mask, name); | ||
| 59 | hist->dccptxh_slab = kmem_cache_create(slab_name, | ||
| 60 | sizeof(struct dccp_tx_hist_entry), | ||
| 61 | 0, SLAB_HWCACHE_ALIGN, | ||
| 62 | NULL, NULL); | ||
| 63 | if (hist->dccptxh_slab == NULL) | ||
| 64 | goto out_free_slab_name; | ||
| 65 | out: | ||
| 66 | return hist; | ||
| 67 | out_free_slab_name: | ||
| 68 | kfree(slab_name); | ||
| 69 | out_free_hist: | ||
| 70 | kfree(hist); | ||
| 71 | hist = NULL; | ||
| 72 | goto out; | ||
| 73 | } | ||
| 74 | |||
| 75 | EXPORT_SYMBOL_GPL(dccp_tx_hist_new); | ||
| 76 | |||
| 77 | void dccp_tx_hist_delete(struct dccp_tx_hist *hist) | ||
| 78 | { | ||
| 79 | const char* name = kmem_cache_name(hist->dccptxh_slab); | ||
| 80 | |||
| 81 | kmem_cache_destroy(hist->dccptxh_slab); | ||
| 82 | kfree(name); | ||
| 83 | kfree(hist); | ||
| 84 | } | ||
| 85 | |||
| 86 | EXPORT_SYMBOL_GPL(dccp_tx_hist_delete); | ||
| 87 | |||
| 88 | struct dccp_tx_hist_entry * | ||
| 89 | dccp_tx_hist_find_entry(const struct list_head *list, const u64 seq) | ||
| 90 | { | ||
| 91 | struct dccp_tx_hist_entry *packet = NULL, *entry; | ||
| 92 | |||
| 93 | list_for_each_entry(entry, list, dccphtx_node) | ||
| 94 | if (entry->dccphtx_seqno == seq) { | ||
| 95 | packet = entry; | ||
| 96 | break; | ||
| 97 | } | ||
| 98 | |||
| 99 | return packet; | ||
| 100 | } | ||
| 101 | |||
| 102 | EXPORT_SYMBOL_GPL(dccp_tx_hist_find_entry); | ||
| 103 | |||
| 104 | void dccp_tx_hist_purge(struct dccp_tx_hist *hist, struct list_head *list) | ||
| 105 | { | ||
| 106 | struct dccp_tx_hist_entry *entry, *next; | ||
| 107 | |||
| 108 | list_for_each_entry_safe(entry, next, list, dccphtx_node) { | ||
| 109 | list_del_init(&entry->dccphtx_node); | ||
| 110 | dccp_tx_hist_entry_delete(hist, entry); | ||
| 111 | } | ||
| 112 | } | ||
| 113 | |||
| 114 | EXPORT_SYMBOL_GPL(dccp_tx_hist_purge); | ||
| 115 | |||
| 116 | void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist, | ||
| 117 | struct list_head *list, | ||
| 118 | struct dccp_tx_hist_entry *packet) | ||
| 119 | { | ||
| 120 | struct dccp_tx_hist_entry *next; | ||
| 121 | |||
| 122 | list_for_each_entry_safe_continue(packet, next, list, dccphtx_node) { | ||
| 123 | list_del_init(&packet->dccphtx_node); | ||
| 124 | dccp_tx_hist_entry_delete(hist, packet); | ||
| 125 | } | ||
| 126 | } | ||
| 127 | |||
| 128 | EXPORT_SYMBOL_GPL(dccp_tx_hist_purge_older); | ||
| 129 | |||
| 130 | /* | ||
| 131 | * Receiver History Routines | ||
| 132 | */ | ||
| 42 | struct dccp_rx_hist *dccp_rx_hist_new(const char *name) | 133 | struct dccp_rx_hist *dccp_rx_hist_new(const char *name) |
| 43 | { | 134 | { |
| 44 | struct dccp_rx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC); | 135 | struct dccp_rx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC); |
| @@ -83,18 +174,24 @@ void dccp_rx_hist_delete(struct dccp_rx_hist *hist) | |||
| 83 | 174 | ||
| 84 | EXPORT_SYMBOL_GPL(dccp_rx_hist_delete); | 175 | EXPORT_SYMBOL_GPL(dccp_rx_hist_delete); |
| 85 | 176 | ||
| 86 | void dccp_rx_hist_purge(struct dccp_rx_hist *hist, struct list_head *list) | 177 | int dccp_rx_hist_find_entry(const struct list_head *list, const u64 seq, |
| 178 | u8 *ccval) | ||
| 87 | { | 179 | { |
| 88 | struct dccp_rx_hist_entry *entry, *next; | 180 | struct dccp_rx_hist_entry *packet = NULL, *entry; |
| 89 | 181 | ||
| 90 | list_for_each_entry_safe(entry, next, list, dccphrx_node) { | 182 | list_for_each_entry(entry, list, dccphrx_node) |
| 91 | list_del_init(&entry->dccphrx_node); | 183 | if (entry->dccphrx_seqno == seq) { |
| 92 | kmem_cache_free(hist->dccprxh_slab, entry); | 184 | packet = entry; |
| 93 | } | 185 | break; |
| 94 | } | 186 | } |
| 95 | 187 | ||
| 96 | EXPORT_SYMBOL_GPL(dccp_rx_hist_purge); | 188 | if (packet) |
| 189 | *ccval = packet->dccphrx_ccval; | ||
| 97 | 190 | ||
| 191 | return packet != NULL; | ||
| 192 | } | ||
| 193 | |||
| 194 | EXPORT_SYMBOL_GPL(dccp_rx_hist_find_entry); | ||
| 98 | struct dccp_rx_hist_entry * | 195 | struct dccp_rx_hist_entry * |
| 99 | dccp_rx_hist_find_data_packet(const struct list_head *list) | 196 | dccp_rx_hist_find_data_packet(const struct list_head *list) |
| 100 | { | 197 | { |
| @@ -184,110 +281,18 @@ void dccp_rx_hist_add_packet(struct dccp_rx_hist *hist, | |||
| 184 | 281 | ||
| 185 | EXPORT_SYMBOL_GPL(dccp_rx_hist_add_packet); | 282 | EXPORT_SYMBOL_GPL(dccp_rx_hist_add_packet); |
| 186 | 283 | ||
| 187 | struct dccp_tx_hist *dccp_tx_hist_new(const char *name) | 284 | void dccp_rx_hist_purge(struct dccp_rx_hist *hist, struct list_head *list) |
| 188 | { | ||
| 189 | struct dccp_tx_hist *hist = kmalloc(sizeof(*hist), GFP_ATOMIC); | ||
| 190 | static const char dccp_tx_hist_mask[] = "tx_hist_%s"; | ||
| 191 | char *slab_name; | ||
| 192 | |||
| 193 | if (hist == NULL) | ||
| 194 | goto out; | ||
| 195 | |||
| 196 | slab_name = kmalloc(strlen(name) + sizeof(dccp_tx_hist_mask) - 1, | ||
| 197 | GFP_ATOMIC); | ||
| 198 | if (slab_name == NULL) | ||
| 199 | goto out_free_hist; | ||
| 200 | |||
| 201 | sprintf(slab_name, dccp_tx_hist_mask, name); | ||
| 202 | hist->dccptxh_slab = kmem_cache_create(slab_name, | ||
| 203 | sizeof(struct dccp_tx_hist_entry), | ||
| 204 | 0, SLAB_HWCACHE_ALIGN, | ||
| 205 | NULL, NULL); | ||
| 206 | if (hist->dccptxh_slab == NULL) | ||
| 207 | goto out_free_slab_name; | ||
| 208 | out: | ||
| 209 | return hist; | ||
| 210 | out_free_slab_name: | ||
| 211 | kfree(slab_name); | ||
| 212 | out_free_hist: | ||
| 213 | kfree(hist); | ||
| 214 | hist = NULL; | ||
| 215 | goto out; | ||
| 216 | } | ||
| 217 | |||
| 218 | EXPORT_SYMBOL_GPL(dccp_tx_hist_new); | ||
| 219 | |||
| 220 | void dccp_tx_hist_delete(struct dccp_tx_hist *hist) | ||
| 221 | { | ||
| 222 | const char* name = kmem_cache_name(hist->dccptxh_slab); | ||
| 223 | |||
| 224 | kmem_cache_destroy(hist->dccptxh_slab); | ||
| 225 | kfree(name); | ||
| 226 | kfree(hist); | ||
| 227 | } | ||
| 228 | |||
| 229 | EXPORT_SYMBOL_GPL(dccp_tx_hist_delete); | ||
| 230 | |||
| 231 | struct dccp_tx_hist_entry * | ||
| 232 | dccp_tx_hist_find_entry(const struct list_head *list, const u64 seq) | ||
| 233 | { | ||
| 234 | struct dccp_tx_hist_entry *packet = NULL, *entry; | ||
| 235 | |||
| 236 | list_for_each_entry(entry, list, dccphtx_node) | ||
| 237 | if (entry->dccphtx_seqno == seq) { | ||
| 238 | packet = entry; | ||
| 239 | break; | ||
| 240 | } | ||
| 241 | |||
| 242 | return packet; | ||
| 243 | } | ||
| 244 | |||
| 245 | EXPORT_SYMBOL_GPL(dccp_tx_hist_find_entry); | ||
| 246 | |||
| 247 | int dccp_rx_hist_find_entry(const struct list_head *list, const u64 seq, | ||
| 248 | u8 *ccval) | ||
| 249 | { | ||
| 250 | struct dccp_rx_hist_entry *packet = NULL, *entry; | ||
| 251 | |||
| 252 | list_for_each_entry(entry, list, dccphrx_node) | ||
| 253 | if (entry->dccphrx_seqno == seq) { | ||
| 254 | packet = entry; | ||
| 255 | break; | ||
| 256 | } | ||
| 257 | |||
| 258 | if (packet) | ||
| 259 | *ccval = packet->dccphrx_ccval; | ||
| 260 | |||
| 261 | return packet != NULL; | ||
| 262 | } | ||
| 263 | |||
| 264 | EXPORT_SYMBOL_GPL(dccp_rx_hist_find_entry); | ||
| 265 | |||
| 266 | void dccp_tx_hist_purge_older(struct dccp_tx_hist *hist, | ||
| 267 | struct list_head *list, | ||
| 268 | struct dccp_tx_hist_entry *packet) | ||
| 269 | { | 285 | { |
| 270 | struct dccp_tx_hist_entry *next; | 286 | struct dccp_rx_hist_entry *entry, *next; |
| 271 | 287 | ||
| 272 | list_for_each_entry_safe_continue(packet, next, list, dccphtx_node) { | 288 | list_for_each_entry_safe(entry, next, list, dccphrx_node) { |
| 273 | list_del_init(&packet->dccphtx_node); | 289 | list_del_init(&entry->dccphrx_node); |
| 274 | dccp_tx_hist_entry_delete(hist, packet); | 290 | kmem_cache_free(hist->dccprxh_slab, entry); |
| 275 | } | 291 | } |
| 276 | } | 292 | } |
| 277 | 293 | ||
| 278 | EXPORT_SYMBOL_GPL(dccp_tx_hist_purge_older); | 294 | EXPORT_SYMBOL_GPL(dccp_rx_hist_purge); |
| 279 | |||
| 280 | void dccp_tx_hist_purge(struct dccp_tx_hist *hist, struct list_head *list) | ||
| 281 | { | ||
| 282 | struct dccp_tx_hist_entry *entry, *next; | ||
| 283 | |||
| 284 | list_for_each_entry_safe(entry, next, list, dccphtx_node) { | ||
| 285 | list_del_init(&entry->dccphtx_node); | ||
| 286 | dccp_tx_hist_entry_delete(hist, entry); | ||
| 287 | } | ||
| 288 | } | ||
| 289 | 295 | ||
| 290 | EXPORT_SYMBOL_GPL(dccp_tx_hist_purge); | ||
| 291 | 296 | ||
| 292 | MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>, " | 297 | MODULE_AUTHOR("Ian McDonald <ian.mcdonald@jandi.co.nz>, " |
| 293 | "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>"); | 298 | "Arnaldo Carvalho de Melo <acme@ghostprotocols.net>"); |
