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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.c | |
| parent | aa187926b739fb391f153335c7552c7a10d60e82 (diff) | |
| download | lwn-95cca2b44e54b00a3ed6ed7dc869717cd6807e81.tar.gz lwn-95cca2b44e54b00a3ed6ed7dc869717cd6807e81.zip | |
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.c')
| -rw-r--r-- | fs/ceph/super.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 2b2a260acb24..caf9801712ca 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -233,7 +233,9 @@ static int parse_fsopt_token(char *c, void *private) break; /* misc */ case Opt_wsize: - fsopt->wsize = intval; + if (intval < PAGE_SIZE || intval > CEPH_MAX_WRITE_SIZE) + return -EINVAL; + fsopt->wsize = ALIGN(intval, PAGE_SIZE); break; case Opt_rsize: if (intval < PAGE_SIZE || intval > CEPH_MAX_READ_SIZE) @@ -392,6 +394,7 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt, fsopt->sb_flags = flags; fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; + fsopt->wsize = CEPH_MAX_WRITE_SIZE; fsopt->rsize = CEPH_MAX_READ_SIZE; fsopt->rasize = CEPH_RASIZE_DEFAULT; fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); |