diff options
| author | Yan, Zheng <zyan@redhat.com> | 2017-07-11 15:56:09 +0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-09-06 19:56:03 +0200 |
| commit | aa187926b739fb391f153335c7552c7a10d60e82 (patch) | |
| tree | 0954de9620a7afe747bdbf3fcca503f11afd630c /fs/ceph/super.c | |
| parent | 2ae409dc6a907e80f4cd32ad4482ef52441e3147 (diff) | |
ceph: limit osd read size to CEPH_MSG_MAX_DATA_LEN
libceph returns -EIO when read size > CEPH_MSG_MAX_DATA_LEN.
Link: http://tracker.ceph.com/issues/20528
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 | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/fs/ceph/super.c b/fs/ceph/super.c index 280311e36a17..2b2a260acb24 100644 --- a/fs/ceph/super.c +++ b/fs/ceph/super.c @@ -236,7 +236,9 @@ static int parse_fsopt_token(char *c, void *private) fsopt->wsize = intval; break; case Opt_rsize: - fsopt->rsize = intval; + if (intval < PAGE_SIZE || intval > CEPH_MAX_READ_SIZE) + return -EINVAL; + fsopt->rsize = ALIGN(intval, PAGE_SIZE); break; case Opt_rasize: fsopt->rasize = intval; @@ -390,7 +392,7 @@ static int parse_mount_options(struct ceph_mount_options **pfsopt, fsopt->sb_flags = flags; fsopt->flags = CEPH_MOUNT_OPT_DEFAULT; - fsopt->rsize = CEPH_RSIZE_DEFAULT; + fsopt->rsize = CEPH_MAX_READ_SIZE; fsopt->rasize = CEPH_RASIZE_DEFAULT; fsopt->snapdir_name = kstrdup(CEPH_SNAPDIRNAME_DEFAULT, GFP_KERNEL); if (!fsopt->snapdir_name) { @@ -505,7 +507,7 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root) seq_printf(m, ",mds_namespace=%s", fsopt->mds_namespace); if (fsopt->wsize) seq_printf(m, ",wsize=%d", fsopt->wsize); - if (fsopt->rsize != CEPH_RSIZE_DEFAULT) + if (fsopt->rsize != CEPH_MAX_READ_SIZE) seq_printf(m, ",rsize=%d", fsopt->rsize); if (fsopt->rasize != CEPH_RASIZE_DEFAULT) seq_printf(m, ",rasize=%d", fsopt->rasize); @@ -948,13 +950,8 @@ static int ceph_setup_bdi(struct super_block *sb, struct ceph_fs_client *fsc) else sb->s_bdi->ra_pages = VM_MAX_READAHEAD * 1024 / PAGE_SIZE; - if (fsc->mount_options->rsize > fsc->mount_options->rasize && - fsc->mount_options->rsize >= PAGE_SIZE) - sb->s_bdi->io_pages = - (fsc->mount_options->rsize + PAGE_SIZE - 1) - >> PAGE_SHIFT; - else if (fsc->mount_options->rsize == 0) - sb->s_bdi->io_pages = ULONG_MAX; + /* set io_pages based on max osd read size */ + sb->s_bdi->io_pages = fsc->mount_options->rsize >> PAGE_SHIFT; return 0; } |