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authorTejun Heo <tj@kernel.org>2015-08-18 14:55:31 -0700
committerJens Axboe <axboe@fb.com>2015-08-18 15:49:18 -0700
commit36aa9e5f591e84d67aad2c5bff75e413d77660dd (patch)
tree228d8986be70359b086c30a453d1fc7ee77cfada /include/linux/blk-cgroup.h
parent880f50e228f80626dff6327a6e281e40286f5228 (diff)
downloadop-kernel-dev-36aa9e5f591e84d67aad2c5bff75e413d77660dd.zip
op-kernel-dev-36aa9e5f591e84d67aad2c5bff75e413d77660dd.tar.gz
blkcg: move body parsing from blkg_conf_prep() to its callers
Currently, blkg_conf_prep() expects input to be of the following form MAJ:MIN NUM and reads the NUM part into blkg_conf_ctx->v. This is quite restrictive and gets in the way in implementing blkcg interface for the unified hierarchy. This patch updates blkg_conf_prep() so that it expects MAJ:MIN BODY_STR where BODY_STR is an arbitrary string. blkg_conf_ctx->v is replaced with ->body which is a char pointer pointing to the start of BODY_STR. Parsing of the body is moved to blkg_conf_prep()'s callers. To allow using, for example, strsep() on blkg_conf_ctx->val, it is a non-const pointer and to accommodate that const is dropped from @input too. This doesn't cause any behavior changes. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-cgroup.h')
-rw-r--r--include/linux/blk-cgroup.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/linux/blk-cgroup.h b/include/linux/blk-cgroup.h
index 6e016e6..85a4d98 100644
--- a/include/linux/blk-cgroup.h
+++ b/include/linux/blk-cgroup.h
@@ -206,11 +206,11 @@ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkcg_gq *blkg,
struct blkg_conf_ctx {
struct gendisk *disk;
struct blkcg_gq *blkg;
- u64 v;
+ char *body;
};
int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
- const char *input, struct blkg_conf_ctx *ctx);
+ char *input, struct blkg_conf_ctx *ctx);
void blkg_conf_finish(struct blkg_conf_ctx *ctx);
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