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Defined in 1 files as a function:

Referenced in 2 files:

Smatch caller information:

net/ipv4/tcp_input.c tcp_shift_skb_data() -> tcp_skb_can_collapse()

Type Parameter Key Value
PARAM_VALUE 0 to 4096-ptr_max
PARAM_VALUE 0 to->cb 4096-ptr_max
PARAM_VALUE 1 from 4096-ptr_max
PARAM_VALUE 1 from->cb 4096-ptr_max
PARAM_VALUE 1 from->data_len 1
PARAM_VALUE 1 from->dev->ndisc_ops->fill_addr_option 4096-ptr_max
PARAM_VALUE 1 from->sk->ns_tracker->alloc_stack_handle 0-4294967295
PARAM_VALUE 1 from->sk->ns_tracker->dead 0-1
PARAM_VALUE 1 from->sk->ns_tracker->free_stack_handle 0-4294967295
PARAM_VALUE 1 from->sk->sk_peer_cred->process_keyring->user->qnbytes s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->process_keyring->user->qnkeys s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->request_key_auth->user->qnbytes s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->request_key_auth->user->qnkeys s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->session_keyring->user->qnbytes s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->session_keyring->user->qnkeys s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->thread_keyring->user->qnbytes s32min-s32max
PARAM_VALUE 1 from->sk->sk_peer_cred->thread_keyring->user->qnkeys s32min-s32max
CAPPED_DATA 1 &from->rbnode 1
DATA_SOURCE 1 from $1
PARAM_COMPARE 1 &from->rbnode != $1->rbnode.__rb_parent_color
RX_PATH
TASK_NOT_RUNNING
HOST_DATA 1 from->next->data_len 0-u32max[c]
HOST_DATA 1 from->next->prev->data_len 0-u32max[c]
HALF_LOCKED2 &sk->sk_lock.slock
HALF_LOCKED2 sk

net/ipv4/tcp_input.c tcp_shift_skb_data() -> tcp_skb_can_collapse()

Type Parameter Key Value
PARAM_VALUE 0 to 4096-ptr_max
PARAM_VALUE 0 to->cb 4096-ptr_max
PARAM_VALUE 0 to->data 4096-ptr_max
PARAM_VALUE 0 to->hdr_len 0
PARAM_VALUE 0 to->head_frag 0
PARAM_VALUE 0 to->ip_summed 3
PARAM_VALUE 0 to->nohdr 0
PARAM_VALUE 0 to->pp_recycle 0
PARAM_VALUE 1 from 4096-ptr_max
PARAM_VALUE 1 from->cb 4096-ptr_max
PARAM_VALUE 1 from->data_len 1
PARAM_VALUE 1 from->dev->ndisc_ops->fill_addr_option 4096-ptr_max
PARAM_VALUE 1 from->sk->ns_tracker->alloc_stack_handle 0-4294967295
PARAM_VALUE 1 from->sk->ns_tracker->dead 0-1
PARAM_VALUE 1 from->sk->ns_tracker->free_stack_handle 0-4294967295
PARAM_VALUE 1 from->sk->sk_callback_lock.owner (-1)
PARAM_VALUE 1 from->sk->sk_callback_lock.owner_cpu u32max
PARAM_VALUE 1 from->sk->sk_filter 0
PARAM_VALUE 1 from->sk->sk_filter->rcu.func 1-u64max
PARAM_VALUE 1 from->sk->sk_frag.page 0
PARAM_VALUE 1 from->sk->sk_owner->refcnt.counter 0-s32max
PARAM_VALUE 1 from->sk->sk_prot_creator->owner->refcnt.counter 0-s32max
PARAM_VALUE 1 from->sk->sk_rcu.func 1-u64max
PARAM_VALUE 1 from->sk->sk_rcu.next 0
PARAM_VALUE 1 from->sk->sk_reuseport_cb->rcu.func 1-u64max
PARAM_VALUE 1 from->sk->sk_security 0
CAPPED_DATA 0 &to->rbnode 1
PARAM_COMPARE 0 &to->rbnode != $0->rbnode.__rb_parent_color
RX_PATH
TASK_NOT_RUNNING
HOST_DATA 1 from->next->data_len 0-u32max[c]
HOST_DATA 1 from->next->prev->data_len 0-u32max[c]
HALF_LOCKED2 &sk->sk_lock.slock
HALF_LOCKED2 sk

net/ipv4/tcp_output.c tcp_can_coalesce_send_queue_head() -> tcp_skb_can_collapse()

Type Parameter Key Value
PARAM_VALUE 0 to 4096-ptr_max
PARAM_VALUE 0 to->len 0-4294967294
CAPPED_DATA 0 to->len 1
RX_PATH
TASK_NOT_RUNNING
UNITS 0 to unit_byte
UNITS 1 from unit_byte
HALF_LOCKED2 &sk->sk_callback_lock
HALF_LOCKED2 &sk->sk_lock.slock
HALF_LOCKED2 sk

net/ipv4/tcp_output.c tcp_grow_skb() -> tcp_skb_can_collapse()

Type Parameter Key Value
PARAM_VALUE 0 to 4096-ptr_max
PARAM_VALUE 0 to->dev->ethtool_ops->get_link_ext_state 0-s64max
PARAM_VALUE 0 to->dev->ethtool_ops->get_mm_stats 0-s64max
PARAM_VALUE 0 to->dev->ethtool_ops->rxfh_max_num_contexts 0-4294967295
PARAM_VALUE 0 to->dev->ethtool_ops->supported_coalesce_params 0-s64max
PARAM_VALUE 0 to->dev->nd_net.net->ipv4.fqdir->f->frag_expire 0,663510801442193408,1753052602134376448,4007388366431105024,8876081723503042560
PARAM_VALUE 0 to->dev->nd_net.net->ipv4.fqdir->f->qsize 0,304,320
PARAM_VALUE 0 to->dev->ndisc_ops->fill_addr_option 4096-ptr_max
PARAM_VALUE 0 to->dev->ndisc_ops->parse_options 4096-ptr_max
PARAM_VALUE 0 to->dev->ndisc_ops->update 4096-ptr_max
PARAM_VALUE 0 to->dev->rtnl_link_ops->maxtype 0-6,8-10,15,18,20,22,24,34,50
PARAM_VALUE 0 to->dev->rtnl_link_ops->priv_size 0,8,32,40,48,56,88,112,120,144,160,224,240,256,296,616,624,728,736,744,1056,1128,1336,1616,2176,2240,2272,2560,3296,3544,3552,3720,9688-u64max
DATA_SOURCE 0 to $1
RX_PATH
TASK_NOT_RUNNING
HOST_DATA 0 to->next->data_len 0-u32max[c]
HOST_DATA 0 to->next->prev->csum_offset 0-u16max
HOST_DATA 0 to->next->prev->data_len 0-u32max[c]
HOST_DATA 0 to->next->prev->len 0-u32max[c]
HOST_DATA 0 to->next->prev->tstamp 500000002-4294967299794967295[c]
HOST_DATA 0 to->prev->csum_offset 0-u16max
HOST_DATA 0 to->prev->data_len 0-u32max[c]
HOST_DATA 0 to->prev->len 0-u32max[c]
HOST_DATA 0 to->prev->tstamp 500000002-4294967299794967295[c]
HOST_DATA 0 *to->data 0-255
HOST_DATA 1 from->data_len 0-u32max[c]
UNITS 1 from unit_byte
HALF_LOCKED2 &sk->sk_callback_lock
HALF_LOCKED2 &sk->sk_lock.slock
HALF_LOCKED2 sk

net/ipv4/tcp_output.c tcp_retrans_try_collapse() -> tcp_skb_can_collapse()

Type Parameter Key Value
PARAM_VALUE 0 to 4096-ptr_max
PARAM_VALUE 0 to->cb 4096-ptr_max
PARAM_VALUE 0 to->dev->nd_net.net->ipv4.fqdir->f->frag_expire 0,663510801442193408,1753052602134376448,4007388366431105024,8876081723503042560
PARAM_VALUE 0 to->dev->nd_net.net->ipv4.fqdir->f->qsize 0,304,320
PARAM_VALUE 0 to->dev->ndisc_ops->fill_addr_option 9149257602806276096
PARAM_VALUE 0 to->dev->ndisc_ops->parse_options 4570881757937598464
PARAM_VALUE 0 to->dev->ndisc_ops->update 8455145027589103616
PARAM_VALUE 0 to->dev->rtnl_link_ops->maxtype 0-6,8-10,15,18,20,22,24,34,50
PARAM_VALUE 0 to->dev->rtnl_link_ops->priv_size 0,8,32,48,56,88,112,120,144,160,224,240,256,296,616,624,728,736,744,1056,1128,1336,1616,2176,2240,2272,2560,3296,3544,3552,3720,9688-u64max
PARAM_VALUE 1 from 4096-ptr_max
PARAM_VALUE 1 from->cb 4096-ptr_max
PARAM_VALUE 1 from->unreadable 0
DATA_SOURCE 0 to $1
PREEMPT_ADD
RX_PATH
TASK_NOT_RUNNING
HALF_LOCKED2 &sk->sk_lock.slock
HALF_LOCKED2 sk