[PATCH v3 09/11] pstore/blk: a way to get user configure about pstore front-ends.
From: WeiXiong Liao <hidden>
Date: 2020-03-25 08:55:42
Also in:
lkml
Subsystem:
filesystems (vfs and infrastructure), pstore filesystem, the rest · Maintainers:
Alexander Viro, Christian Brauner, Kees Cook, Linus Torvalds
It's one of a series of patches to adapt to MTD device. It's different to block driver, MTD driver should check zone size and get identifier to MTD device. To make it, psblk_usr_info() is created. Signed-off-by: WeiXiong Liao <redacted> --- fs/pstore/pstore_blk.c | 37 ++++++++++++++++++++++++++++++------- include/linux/pstore_blk.h | 10 ++++++++++ 2 files changed, 40 insertions(+), 7 deletions(-)
diff --git a/fs/pstore/pstore_blk.c b/fs/pstore/pstore_blk.c
index d6949146135b..061609b66d8a 100644
--- a/fs/pstore/pstore_blk.c
+++ b/fs/pstore/pstore_blk.c@@ -84,6 +84,17 @@ sector_t start_sect; } g_bdev_info; +#define check_size(name, alignsize) ({ \ + long _##name_ = (name); \ + _##name_ = _##name_ <= 0 ? 0 : (_##name_ * 1024); \ + if (_##name_ & ((alignsize) - 1)) { \ + pr_info(#name " must align to %d\n", \ + (alignsize)); \ + _##name_ = ALIGN(name, (alignsize)); \ + } \ + _##name_; \ +}) + /** * struct psblk_device - back-end pstore/blk driver structure. *
@@ -138,13 +149,11 @@ static int psblk_register_do(struct psblk_device *dev) if (!dev->flags) dev->flags = UINT_MAX; #define verify_size(name, alignsize, enable) { \ - long _##name_ = (enable) ? (name) : 0; \ - _##name_ = _##name_ <= 0 ? 0 : (_##name_ * 1024); \ - if (_##name_ & ((alignsize) - 1)) { \ - pr_info(#name " must align to %d\n", \ - (alignsize)); \ - _##name_ = ALIGN(name, (alignsize)); \ - } \ + long _##name_; \ + if (enable) \ + _##name_ = check_size(name, alignsize); \ + else \ + _##name_ = 0; \ name = _##name_ / 1024; \ psz_info->name = _##name_; \ }
@@ -464,6 +473,20 @@ int psblk_blkdev_info(dev_t *devt, sector_t *nr_sects, sector_t *start_sect) } EXPORT_SYMBOL_GPL(psblk_blkdev_info); +/* get information of pstore/blk */ +int psblk_usr_info(struct psblk_info *info) +{ + strncpy(info->device, blkdev, 80); + info->dump_oops = dump_oops <= 0 ? 0 : 1; + info->oops_size = check_size(oops_size, 4096); + info->pmsg_size = check_size(pmsg_size, 4096); + info->ftrace_size = check_size(ftrace_size, 4096); + info->console_size = check_size(console_size, 4096); + + return 0; +} +EXPORT_SYMBOL_GPL(psblk_usr_info); + MODULE_LICENSE("GPL"); MODULE_AUTHOR("WeiXiong Liao <liaoweixiong@allwinnertech.com>"); MODULE_DESCRIPTION("Block device Oops/Panic logger");
diff --git a/include/linux/pstore_blk.h b/include/linux/pstore_blk.h
index 828b0763d477..d2ea1733b51a 100644
--- a/include/linux/pstore_blk.h
+++ b/include/linux/pstore_blk.h@@ -27,4 +27,14 @@ int psblk_register_blkdev(unsigned int major, unsigned int flags, void psblk_unregister_blkdev(unsigned int major); int psblk_blkdev_info(dev_t *devt, sector_t *nr_sects, sector_t *start_sect); +struct psblk_info { + int dump_oops; + char device[80]; + unsigned long oops_size; + unsigned long pmsg_size; + unsigned long console_size; + unsigned long ftrace_size; +}; +int psblk_usr_info(struct psblk_info *info); + #endif
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1.9.1