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authorGreg Farnum <gregory.farnum@dreamhost.com>2011-08-25 12:43:06 -0700
committerSage Weil <sage@newdream.net>2011-10-25 16:10:16 -0700
commita35eca958aa1c7d0b5f993db1a3ded45ae16d59b (patch)
tree4d496b38cdd39d3363aaf23888f1932422ce5682 /fs/ceph/ioctl.c
parent83eaea22bdfc9e1cec88f81be5b64f30f6c37e8b (diff)
downloadlinux-a35eca958aa1c7d0b5f993db1a3ded45ae16d59b.tar.bz2
ceph: let the set_layout ioctl set single traits
Previously we were validating the passed-in stripe unit, object size, and stripe count against each other (and not testing most other stuff). Instead, make sure that the composed previous layout and new values are valid, and only send the new values to the MDS. This lets users change the pool without setting the whole layout, for instance. Signed-off-by: Greg Farnum <gregory.farnum@dreamhost.com>
Diffstat (limited to 'fs/ceph/ioctl.c')
-rw-r--r--fs/ceph/ioctl.c34
1 files changed, 28 insertions, 6 deletions
diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index 3b256b50f7d8..5a14c29cbba6 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -42,17 +42,39 @@ static long ceph_ioctl_set_layout(struct file *file, void __user *arg)
struct ceph_mds_client *mdsc = ceph_sb_to_client(inode->i_sb)->mdsc;
struct ceph_mds_request *req;
struct ceph_ioctl_layout l;
+ struct ceph_inode_info *ci = ceph_inode(file->f_dentry->d_inode);
+ struct ceph_ioctl_layout nl;
int err, i;
- /* copy and validate */
if (copy_from_user(&l, arg, sizeof(l)))
return -EFAULT;
- if ((l.object_size & ~PAGE_MASK) ||
- (l.stripe_unit & ~PAGE_MASK) ||
- !l.stripe_unit ||
- (l.object_size &&
- (unsigned)l.object_size % (unsigned)l.stripe_unit))
+ /* validate changed params against current layout */
+ err = ceph_do_getattr(file->f_dentry->d_inode, CEPH_STAT_CAP_LAYOUT);
+ if (!err) {
+ nl.stripe_unit = ceph_file_layout_su(ci->i_layout);
+ nl.stripe_count = ceph_file_layout_stripe_count(ci->i_layout);
+ nl.object_size = ceph_file_layout_object_size(ci->i_layout);
+ nl.data_pool = le32_to_cpu(ci->i_layout.fl_pg_pool);
+ nl.preferred_osd =
+ (s32)le32_to_cpu(ci->i_layout.fl_pg_preferred);
+ } else
+ return err;
+
+ if (l.stripe_count)
+ nl.stripe_count = l.stripe_count;
+ if (l.stripe_unit)
+ nl.stripe_unit = l.stripe_unit;
+ if (l.object_size)
+ nl.object_size = l.object_size;
+ if (l.data_pool)
+ nl.data_pool = l.data_pool;
+ if (l.preferred_osd)
+ nl.preferred_osd = l.preferred_osd;
+
+ if ((nl.object_size & ~PAGE_MASK) ||
+ (nl.stripe_unit & ~PAGE_MASK) ||
+ ((unsigned)nl.object_size % (unsigned)nl.stripe_unit))
return -EINVAL;
/* make sure it's a valid data pool */