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| author | Ilya Dryomov <idryomov@gmail.com> | 2017-01-25 18:16:21 +0100 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-02-20 12:16:13 +0100 |
| commit | 2544a02090aa76ffb8069e6bf23d886e34d9c8da (patch) | |
| tree | 753549a7f2179184f22fd0ade10edf45f3d6d606 /net | |
| parent | fe5478e0f6694312ad17dea7083296c1aea0a049 (diff) | |
| download | linux-stable-2544a02090aa76ffb8069e6bf23d886e34d9c8da.tar.gz linux-stable-2544a02090aa76ffb8069e6bf23d886e34d9c8da.tar.bz2 linux-stable-2544a02090aa76ffb8069e6bf23d886e34d9c8da.zip | |
libceph: pass reply buffer length through ceph_osdc_call()
To spare checking for "this reply fits into a page, but does it fit
into my buffer?" in some callers, osd_req_op_cls_response_data_pages()
needs to know how big it is.
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Jason Dillaman <dillaman@redhat.com>
Diffstat (limited to 'net')
| -rw-r--r-- | net/ceph/cls_lock_client.c | 2 | ||||
| -rw-r--r-- | net/ceph/osd_client.c | 7 |
2 files changed, 6 insertions, 3 deletions
diff --git a/net/ceph/cls_lock_client.c b/net/ceph/cls_lock_client.c index 50f040fdb2a9..f13a1ea87459 100644 --- a/net/ceph/cls_lock_client.c +++ b/net/ceph/cls_lock_client.c @@ -278,7 +278,7 @@ int ceph_cls_lock_info(struct ceph_osd_client *osdc, int get_info_op_buf_size; int name_len = strlen(lock_name); struct page *get_info_op_page, *reply_page; - size_t reply_len; + size_t reply_len = PAGE_SIZE; void *p, *end; int ret; diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c index 3a2417bb6ff0..ac4753421d0c 100644 --- a/net/ceph/osd_client.c +++ b/net/ceph/osd_client.c @@ -4023,7 +4023,7 @@ EXPORT_SYMBOL(ceph_osdc_maybe_request_map); * Execute an OSD class method on an object. * * @flags: CEPH_OSD_FLAG_* - * @resp_len: out param for reply length + * @resp_len: in/out param for reply length */ int ceph_osdc_call(struct ceph_osd_client *osdc, struct ceph_object_id *oid, @@ -4036,6 +4036,9 @@ int ceph_osdc_call(struct ceph_osd_client *osdc, struct ceph_osd_request *req; int ret; + if (req_len > PAGE_SIZE || (resp_page && *resp_len > PAGE_SIZE)) + return -E2BIG; + req = ceph_osdc_alloc_request(osdc, NULL, 1, false, GFP_NOIO); if (!req) return -ENOMEM; @@ -4054,7 +4057,7 @@ int ceph_osdc_call(struct ceph_osd_client *osdc, 0, false, false); if (resp_page) osd_req_op_cls_response_data_pages(req, 0, &resp_page, - PAGE_SIZE, 0, false, false); + *resp_len, 0, false, false); ceph_osdc_start_request(osdc, req, false); ret = ceph_osdc_wait_request(osdc, req); |