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| author | Yan, Zheng <zyan@redhat.com> | 2017-07-11 17:34:46 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-09-06 19:56:41 +0200 |
| commit | 95cca2b44e54b00a3ed6ed7dc869717cd6807e81 (patch) | |
| tree | 944f555f63a1b9641f2598703a562777437b0456 /fs/ceph/super.h | |
| parent | aa187926b739fb391f153335c7552c7a10d60e82 (diff) | |
| download | linux-95cca2b44e54b00a3ed6ed7dc869717cd6807e81.tar.bz2 | |
ceph: limit osd write size
OSD has a configurable limitation of max write size. OSD return
error if write request size is larger than the limitation. For now,
set max write size to CEPH_MSG_MAX_DATA_LEN. It should be small
enough.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/super.h')
| -rw-r--r-- | fs/ceph/super.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h index 2b1b021ad6b8..eed2a67d8e52 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -48,6 +48,9 @@ /* max size of osd read request, limited by libceph */ #define CEPH_MAX_READ_SIZE CEPH_MSG_MAX_DATA_LEN +/* osd has a configurable limitaion of max write size. + * CEPH_MSG_MAX_DATA_LEN should be small enough. */ +#define CEPH_MAX_WRITE_SIZE CEPH_MSG_MAX_DATA_LEN #define CEPH_RASIZE_DEFAULT (8192*1024) /* max readahead */ #define CEPH_MAX_READDIR_DEFAULT 1024 #define CEPH_MAX_READDIR_BYTES_DEFAULT (512*1024) |