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authorChengguang Xu <cgxu519@gmx.com>2018-07-19 22:15:24 +0800
committerIlya Dryomov <idryomov@gmail.com>2018-08-02 21:33:27 +0200
commit719784ba706cdbb47ef87483950f0a4594d36e87 (patch)
tree98ebbab08cb3fda315435011ad517effcc08956e /fs/ceph
parentf1d10e04637924f2b00a0fecdd2ca4565f5cfc3f (diff)
ceph: add new field max_file_size in ceph_fs_client
In order to not bother to VFS and other specific filesystems, we decided to do offset validation inside ceph kernel client, so just simply set sb->s_maxbytes to MAX_LFS_FILESIZE so that it can successfully pass VFS check. We add new field max_file_size in ceph_fs_client to store real file size limit and doing proper check based on it. Signed-off-by: Chengguang Xu <cgxu519@gmx.com> Reviewed-by: "Yan, Zheng" <zyan@redhat.com> Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/mds_client.c3
-rw-r--r--fs/ceph/super.c3
-rw-r--r--fs/ceph/super.h1
3 files changed, 5 insertions, 2 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 4fc7582233db..dfbe138472e6 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -4018,7 +4018,8 @@ void ceph_mdsc_handle_mdsmap(struct ceph_mds_client *mdsc, struct ceph_msg *msg)
} else {
mdsc->mdsmap = newmap; /* first mds map */
}
- mdsc->fsc->sb->s_maxbytes = mdsc->mdsmap->m_max_file_size;
+ mdsc->fsc->max_file_size = min((loff_t)mdsc->mdsmap->m_max_file_size,
+ MAX_LFS_FILESIZE);
__wake_requests(mdsc, &mdsc->waiting_for_map);
ceph_monc_got_map(&mdsc->fsc->client->monc, CEPH_SUB_MDSMAP,
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index 3d8a26b2944f..43ca3b763875 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -940,11 +940,12 @@ static int ceph_set_super(struct super_block *s, void *data)
dout("set_super %p data %p\n", s, data);
s->s_flags = fsc->mount_options->sb_flags;
- s->s_maxbytes = 1ULL << 40; /* temp value until we get mdsmap */
+ s->s_maxbytes = MAX_LFS_FILESIZE;
s->s_xattr = ceph_xattr_handlers;
s->s_fs_info = fsc;
fsc->sb = s;
+ fsc->max_file_size = 1ULL << 40; /* temp value until we get mdsmap */
s->s_op = &ceph_super_ops;
s->s_d_op = &ceph_dentry_ops;
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index d3eb70e2b527..f09dbf2a2e26 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -98,6 +98,7 @@ struct ceph_fs_client {
unsigned long mount_state;
int min_caps; /* min caps i added */
+ loff_t max_file_size;
struct ceph_mds_client *mdsc;