kernel.git/fs/pstore/pmsg.c, branch linux-4.18.y

pstore: Create common record initializer

2017-05-31T17:13:44Z

In preparation for setting timestamps in the pstore core, create a common initializer routine, instead of using static initializers. Signed-off-by: Kees Cook

pstore: Remove unused vmalloc.h in pmsg

2017-04-27T21:48:59Z

Since the vmalloc code has been removed from write_pmsg() in the commit "5bf6d1b pstore/pmsg: drop bounce buffer", remove the unused header vmalloc.h. Signed-off-by: Geliang Tang Signed-off-by: Kees Cook

pstore: Remove write_buf() callback

2017-03-07T22:01:02Z

Now that write() and write_buf() are functionally identical, this removes write_buf(), and renames write_buf_user() to write_user(). Additionally adds sanity-checks for pstore_info's declared functions and flags at registration time. Signed-off-by: Kees Cook

pstore: Replace arguments for write_buf_user() API

2017-03-07T22:01:01Z

Removes argument list in favor of pstore record, though the user buffer remains passed separately since it must carry the __user annotation. Signed-off-by: Kees Cook

pstore/pmsg: drop bounce buffer

2016-09-08T22:01:10Z

Removing a bounce buffer copy operation in the pmsg driver path is always better. We also gain in overall performance by not requesting a vmalloc on every write as this can cause precious RT tasks, such as user facing media operation, to stall while memory is being reclaimed. Added a write_buf_user to the pstore functions, a backup platform write_buf_user that uses the small buffer that is part of the instance, and implemented a ramoops write_buf_user that only supports PSTORE_TYPE_PMSG. Signed-off-by: Mark Salyzyn Signed-off-by: Kees Cook

pstore: add pstore unregister

2015-10-22T15:59:18Z

pstore doesn't support unregistering yet. It was marked as TODO. This patch adds some code to fix it: 1) Add functions to unregister kmsg/console/ftrace/pmsg. 2) Add a function to free compression buffer. 3) Unmap the memory and free it. 4) Add a function to unregister pstore filesystem. Signed-off-by: Geliang Tang Acked-by: Kees Cook [Removed __exit annotation from ramoops_remove(). Reported by Arnd Bergmann] Signed-off-by: Tony Luck

pstore: add vmalloc error check

2015-10-21T16:27:10Z

If vmalloc fails, make write_pmsg return -ENOMEM. Signed-off-by: Geliang Tang Acked-by: Kees Cook Signed-off-by: Tony Luck

pstore: Add pmsg - user-space accessible pstore object

2015-01-17T00:01:10Z

A secured user-space accessible pstore object. Writes to /dev/pmsg0 are appended to the buffer, on reboot the persistent contents are available in /sys/fs/pstore/pmsg-ramoops-[ID]. One possible use is syslogd, or other daemon, can write messages, then on reboot provides a means to triage user-space activities leading up to a panic as a companion to the pstore dmesg or console logs. Signed-off-by: Mark Salyzyn Acked-by: Kees Cook Signed-off-by: Tony Luck