page_cache_sync_readahead – generic file readahead Synopsis void page_cache_sync_readahead(struct address_space *mapping, struct file_ra_state *ra, struct file *filp, pgoff_t offset, unsigned long req_size); Arguments mapping address_space which holds the pagecache and I/O vectors ra file_ra_state which holds the readahead state filp passed on to ->readpage and ->readpages offset start offset into mapping, in pagecache page-sized units req_size…
page_cache_prev_hole – find the prev hole (not-present entry) Synopsis pgoff_t page_cache_prev_hole(struct address_space * mapping, pgoff_t index, unsigned long max_scan); Arguments mapping mapping index index max_scan maximum range to search Description Search backwards in the range [max(index-max_scan+1, 0), index] for the first hole. Return the index of the hole if found, otherwise returns an index outside of the set specified…
page_cache_next_hole – find the next hole (not-present entry) Synopsis pgoff_t page_cache_next_hole(struct address_space * mapping, pgoff_t index, unsigned long max_scan); Arguments mapping mapping index index max_scan maximum range to search Description Search the set [index, min(index+max_scan-1, MAX_INDEX)] for the lowest indexed hole. Return the index of the hole if found, otherwise returns an index outside of the set specified (in…
page_cache_async_readahead – file readahead for marked pages Synopsis void page_cache_async_readahead(struct address_space *mapping, struct file_ra_state *ra, struct file *filp, struct page *page, pgoff_t offset, unsigned long req_size); Arguments mapping address_space which holds the pagecache and I/O vectors ra file_ra_state which holds the readahead state filp passed on to ->readpage and ->readpages page the page at offset…
of_mdio_find_bus – Given an mii_bus node, find the mii_bus. Synopsis struct mii_bus *of_mdio_find_bus(struct device_node *mdio_bus_np); Arguments mdio_bus_np Pointer to the mii_bus. Description Returns a reference to the mii_bus, or NULL if none found. The embedded struct device will have its reference count incremented, and this must be put once the bus is finished with. Because…
nr_free_zone_pages – count number of pages beyond high watermark Synopsis unsigned long nr_free_zone_pages(int offset); Arguments offset The zone index of the highest zone Description nr_free_zone_pages counts the number of counts pages which are beyond the high watermark within all zones at or below a given zone index. For each zone, the number of pages is…
nr_free_pagecache_pages – count number of pages beyond high watermark Synopsis unsigned long nr_free_pagecache_pages(void); Arguments void no arguments Description nr_free_pagecache_pages counts the number of pages which are beyond the high watermark within all zones. Copyright
node_map_pfn_alignment – determine the maximum internode alignment Synopsis unsigned long node_map_pfn_alignment(void); Arguments void no arguments Description This function should be called after node map is populated and sorted. It calculates the maximum power of two alignment which can distinguish all the nodes. For example, if all nodes are 1GiB and aligned to 1GiB, the return…
new_inode – obtain an inode Synopsis struct inode *new_inode(struct super_block *sb); Arguments sb superblock Description Allocates a new inode for given superblock. The default gfp_mask for allocations related to inode->i_mapping is GFP_HIGHUSER_MOVABLE. If HIGHMEM pages are unsuitable or it is known that pages allocated for the page cache are not reclaimable or migratable, mapping_set_gfp_mask must…
netif_wake_subqueue – allow sending packets on subqueue Synopsis void netif_wake_subqueue(struct net_device *dev, u16 queue_index); Arguments dev network device queue_index sub queue index Description Resume individual transmit queue of a device with multiple transmit queues. Copyright
netif_wake_queue – restart transmit Synopsis void netif_wake_queue(struct net_device *dev); Arguments dev network device Description Allow upper layers to call the device hard_start_xmit routine. Used for flow control when transmit resources are available. Copyright
netif_tx_napi_add – initialize a NAPI context Synopsis void netif_tx_napi_add(struct net_device *dev, struct napi_struct *napi, int (*poll)(struct napi_struct *, int), int weight); Arguments dev network device napi NAPI context poll polling function weight default weight Description This variant of netif_napi_add should be used from drivers using NAPI to exclusively poll a TX queue. This will avoid…
netif_tx_lock – grab network device transmit lock Synopsis void netif_tx_lock(struct net_device *dev); Arguments dev network device Description Get network device transmit lock Copyright
netif_stop_subqueue – stop sending packets on subqueue Synopsis void netif_stop_subqueue(struct net_device *dev, u16 queue_index); Arguments dev network device queue_index sub queue index Description Stop individual transmit queue of a device with multiple transmit queues. Copyright
netif_stop_queue – stop transmitted packets Synopsis void netif_stop_queue(struct net_device *dev); Arguments dev network device Description Stop upper layers calling the device hard_start_xmit routine. Used for flow control when transmit resources are unavailable. Copyright
netif_start_subqueue – allow sending packets on subqueue Synopsis void netif_start_subqueue(struct net_device *dev, u16 queue_index); Arguments dev network device queue_index sub queue index Description Start individual transmit queue of a device with multiple transmit queues. Copyright
netif_start_queue – allow transmit Synopsis void netif_start_queue(struct net_device *dev); Arguments dev network device Description Allow upper layers to call the device hard_start_xmit routine. Copyright
netif_stacked_transfer_operstate – transfer operstate Synopsis void netif_stacked_transfer_operstate(const struct net_device *rootdev, struct net_device *dev); Arguments rootdev the root or lower level device to transfer state from dev the device to transfer operstate to Description Transfer operational state from root to device. This is normally called when a stacking relationship exists between the root device and the…
netif_set_real_num_rx_queues – set actual number of RX queues used Synopsis int netif_set_real_num_rx_queues(struct net_device *dev, unsigned int rxq); Arguments dev Network device rxq Actual number of RX queues Description This must be called either with the rtnl_lock held or before registration of the net device. Returns 0 on success, or a negative error code. If called…
netif_rx – post buffer to the network code Synopsis int netif_rx(struct sk_buff *skb); Arguments skb buffer to post Description This function receives a packet from a device driver and queues it for the upper (protocol) levels to process. It always succeeds. The buffer may be dropped during processing for congestion control or by the protocol…