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| author | Song Liu <songliubraving@fb.com> | 2016-11-18 00:24:42 +0100 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2016-11-18 22:27:45 +0100 |
| commit | 9ed988f5dc673f009d78f7ac55c5da88e1cf58a0 (patch) | |
| tree | 2d5d9307dc7cde11b5a0938a5ce183fd371764cd | |
| parent | md/r5cache: sysfs entry journal_mode (diff) | |
| download | linux-9ed988f5dc673f009d78f7ac55c5da88e1cf58a0.tar.xz linux-9ed988f5dc673f009d78f7ac55c5da88e1cf58a0.zip | |
md/r5cache: refactoring journal recovery code
1. rename r5l_read_meta_block() as r5l_recovery_read_meta_block();
2. pull the code that initialize r5l_meta_block from
r5l_log_write_empty_meta_block() to a separate function
r5l_recovery_create_empty_meta_block(), so that we can reuse this
piece of code.
Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
| -rw-r--r-- | drivers/md/raid5-cache.c | 27 |
1 files changed, 18 insertions, 9 deletions
diff --git a/drivers/md/raid5-cache.c b/drivers/md/raid5-cache.c index b9ad0e8fcf67..390be840c764 100644 --- a/drivers/md/raid5-cache.c +++ b/drivers/md/raid5-cache.c @@ -1356,8 +1356,8 @@ struct r5l_recovery_ctx { u64 seq; /* recovery position seq */ }; -static int r5l_read_meta_block(struct r5l_log *log, - struct r5l_recovery_ctx *ctx) +static int r5l_recovery_read_meta_block(struct r5l_log *log, + struct r5l_recovery_ctx *ctx) { struct page *page = ctx->meta_page; struct r5l_meta_block *mb; @@ -1530,7 +1530,7 @@ static void r5l_recovery_flush_log(struct r5l_log *log, struct r5l_recovery_ctx *ctx) { while (1) { - if (r5l_read_meta_block(log, ctx)) + if (r5l_recovery_read_meta_block(log, ctx)) return; if (r5l_recovery_flush_one_meta(log, ctx)) return; @@ -1539,17 +1539,16 @@ static void r5l_recovery_flush_log(struct r5l_log *log, } } -static int r5l_log_write_empty_meta_block(struct r5l_log *log, sector_t pos, - u64 seq) +static void +r5l_recovery_create_empty_meta_block(struct r5l_log *log, + struct page *page, + sector_t pos, u64 seq) { - struct page *page; struct r5l_meta_block *mb; u32 crc; - page = alloc_page(GFP_KERNEL | __GFP_ZERO); - if (!page) - return -ENOMEM; mb = page_address(page); + clear_page(mb); mb->magic = cpu_to_le32(R5LOG_MAGIC); mb->version = R5LOG_VERSION; mb->meta_size = cpu_to_le32(sizeof(struct r5l_meta_block)); @@ -1557,7 +1556,17 @@ static int r5l_log_write_empty_meta_block(struct r5l_log *log, sector_t pos, mb->position = cpu_to_le64(pos); crc = crc32c_le(log->uuid_checksum, mb, PAGE_SIZE); mb->checksum = cpu_to_le32(crc); +} +static int r5l_log_write_empty_meta_block(struct r5l_log *log, sector_t pos, + u64 seq) +{ + struct page *page; + + page = alloc_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + r5l_recovery_create_empty_meta_block(log, page, pos, seq); if (!sync_page_io(log->rdev, pos, PAGE_SIZE, page, REQ_OP_WRITE, WRITE_FUA, false)) { __free_page(page); |