Dear All, This series of patches extends kmsg interface with ability to dynamicaly create (and destroy) kmsg-like devices which can be used by user space for logging. Logging to kernel has number of benefits, including but not limited to - always available, requiring no userspace, automatically rotating and low overhead. User-space logging to kernel cyclic buffers was already successfully used in android logger concept but it had certain flaws that this commits try to address: * drops hardcoded number of devices and static paths in favor for dynamic configuration by ioctl interface in userspace * extends existing driver instead of creating completely new one Those patches apply on branch 'master', (commit 9bdc771f2c29a11920f477fba05a58e23ee42554): git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git Marcin Niesluchowski (8): printk: move code regarding log message storing format printk: add one function for storing log in proper format kmsg: introduce additional kmsg devices support kmsg: add function for adding and deleting additional buffers kmsg: device support in mem class kmsg: add predefined _PID, _TID, _COMM keywords to kmsg* log dict kmsg: add ioctl for adding and deleting kmsg* devices kmsg: add ioctl for kmsg* devices operating on buffers Documentation/ioctl/ioctl-number.txt | 1 + drivers/char/mem.c | 154 +++- fs/proc/kmsg.c | 4 +- include/linux/printk.h | 6 + include/uapi/linux/Kbuild | 1 + include/uapi/linux/kmsg_ioctl.h | 45 ++ kernel/printk/printk.c | 1361 ++++++++++++++++++++++------------ 7 files changed, 1087 insertions(+), 485 deletions(-) create mode 100644 include/uapi/linux/kmsg_ioctl.h -- Best Regards, Marcin Niesluchowski -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
