The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
bdev_dax_supported – Check if the device supports dax for filesystem Synopsis int bdev_dax_supported(struct super_block *sb, int blocksize); Arguments sb The superblock of the device blocksize The block size of the device Description This is a library function for filesystems to check if the block device can be mounted with dax option. Return negative errno if…
bd_unlink_disk_holder – destroy symlinks created by bd_link_disk_holder Synopsis void bd_unlink_disk_holder(struct block_device *bdev, struct gendisk *disk); Arguments bdev the calimed slave bdev disk the holding disk Description DON’T USE THIS UNLESS YOU’RE ALREADY USING IT. Context Might sleep. Copyright
bd_link_disk_holder – create symlinks between holding disk and slave bdev Synopsis int bd_link_disk_holder(struct block_device *bdev, struct gendisk *disk); Arguments bdev the claimed slave bdev disk the holding disk Description DON’T USE THIS UNLESS YOU’RE ALREADY USING IT. This functions creates the following sysfs symlinks. – from “slaves” directory of the holder disk to the claimed…
balance_dirty_pages_ratelimited – balance dirty memory state Synopsis void balance_dirty_pages_ratelimited(struct address_space *mapping); Arguments mapping address_space which was dirtied Description Processes which are dirtying memory should call in here once for each page which was newly dirtied. The function will periodically check the system’s dirty state and will initiate writeback if needed. On really big machines, get_writeback_state…
auditsc_get_stamp – get local copies of audit_context values Synopsis int auditsc_get_stamp(struct audit_context *ctx, struct timespec *t, unsigned int *serial); Arguments ctx audit_context for the task t timespec to store time recorded in the audit_context serial serial value that is recorded in the audit_context Description Also sets the context as auditable. Copyright
audit_set_loginuid – set current task’s audit_context loginuid Synopsis int audit_set_loginuid(kuid_t loginuid); Arguments loginuid loginuid value Description Returns 0. Called (set) from fs/proc/base.c::proc_loginuid_write. Copyright
audit_rule_change – apply all rules to the specified message type Synopsis int audit_rule_change(int type, __u32 portid, int seq, void *data, size_t datasz); Arguments type audit message type portid target port id for netlink audit messages seq netlink audit message sequence (serial) number data payload data datasz size of payload data Copyright
audit_log_start – obtain an audit buffer Synopsis struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask, int type); Arguments ctx audit_context (may be NULL) gfp_mask type of allocation type audit message type Description Returns audit_buffer pointer on success or NULL on error. Obtain an audit buffer. This routine does locking to obtain the audit buffer, but then…
audit_log_secctx – Converts and logs SELinux context Synopsis void audit_log_secctx(struct audit_buffer *ab, u32 secid); Arguments ab audit_buffer secid security number Description This is a helper function that calls security_secid_to_secctx to convert secid to secctx and then adds the (converted) SELinux context to the audit log by calling audit_log_format, thus also preventing leak of internal secid…
audit_log_format – format a message into the audit buffer. Synopsis void audit_log_format(struct audit_buffer *ab, const char *fmt, …); Arguments ab audit_buffer fmt format string … optional parameters matching fmt string Description All the work is done in audit_log_vformat. Copyright
audit_log_end – end one audit record Synopsis void audit_log_end(struct audit_buffer *ab); Arguments ab the audit_buffer Description netlink_unicast cannot be called inside an irq context because it blocks (last arg, flags, is not set to MSG_DONTWAIT), so the audit buffer is placed on a queue and a tasklet is scheduled to remove them from the queue…
audit_log – Log an audit record Synopsis void audit_log(struct audit_context *ctx, gfp_t gfp_mask, int type, const char *fmt, …); Arguments ctx audit context gfp_mask type of allocation type audit message type fmt format string to use … variable parameters matching the format string Description This is a convenience function that calls audit_log_start, audit_log_vformat, and audit_log_end….
audit_list_rules_send – list the audit rules Synopsis int audit_list_rules_send(struct sk_buff *request_skb, int seq); Arguments request_skb skb of request we are replying to (used to target the reply) seq netlink audit message sequence (serial) number Copyright
audit_core_dumps – record information about processes that end abnormally Synopsis void audit_core_dumps(long signr); Arguments signr signal value Description If a process ends with a core dump, something fishy is going on and we should record the event for investigation. Copyright
audit_compare_dname_path – compare given dentry name with last component in given path. Return of 0 indicates a match. Synopsis int audit_compare_dname_path(const char *dname, const char *path, int parentlen); Arguments dname dentry name that we’re comparing path full pathname that we’re comparing parentlen length of the parent if known. Passing in AUDIT_NAME_FULL here indicates that we…
audit_alloc – allocate an audit context block for a task Synopsis int audit_alloc(struct task_struct *tsk); Arguments tsk task Description Filter on the task information and allocate a per-task audit context if necessary. Doing so turns on system call auditing for the specified task. This is called from copy_process, so no lock is needed. Copyright
atomic_dec_and_mutex_lock – return holding mutex if we dec to 0 Synopsis int atomic_dec_and_mutex_lock(atomic_t *cnt, struct mutex *lock); Arguments cnt the atomic which we are to dec lock the mutex to return holding if we dec to 0 Description return true and hold lock if we dec to 0, return false otherwise Author Rusty Russell <rusty…
atapi_xlat – Initialize PACKET taskfile Synopsis unsigned int atapi_xlat(struct ata_queued_cmd *qc); Arguments qc command structure to be initialized Description LOCKING: spin_lock_irqsave(host lock) Return Zero on success, non-zero on failure. Author Jeff Garzik Author. Copyright
atapi_drain_needed – Check whether data transfer may overflow Synopsis int atapi_drain_needed(struct request *rq); Arguments rq request to be checked Description ATAPI commands which transfer variable length data to host might overflow due to application error or hardware bug. This function checks whether overflow should be drained and ignored for request. LOCKING: None. Return 1 if…
atapi_cmd_type – Determine ATAPI command type from SCSI opcode Synopsis int atapi_cmd_type(u8 opcode); Arguments opcode SCSI opcode Description Determine ATAPI command type from opcode. LOCKING: None. Return ATAPI_{READ|WRITE|READ_CD|PASS_THRU|MISC} Author Jeff Garzik Author. Copyright