On Tue, Jan 24, 2017 at 06:38:02PM -0800, Omar Sandoval wrote: > From: Omar Sandoval <[email protected]> > > When you snapshot a subvolume containing a subvolume, you get a > placeholder read-only directory where the subvolume would be. These > directory inodes have ->i_ops set to btrfs_dir_ro_inode_operations. > Previously, this didn't include the xattr operation callbacks. The > conversion to xattr_handlers missed this case, leading to bogus attempts > to set xattrs on these inodes. This manifested itself as failures when > running delayed inodes. > > To fix this, clear the IOP_XATTR in ->i_opflags on these inodes. > > Fixes: 6c6ef9f26e59 ("xattr: Stop calling {get,set,remove}xattr inode > operations") > Cc: Andreas Gruenbacher <[email protected]> > Reported-by: Chris Murphy <[email protected]> > Signed-off-by: Omar Sandoval <[email protected]> > --- > Applies to v4.10-rc4. Chris, this fixes the issue for me, could you please > test > it out? Andreas, does this make sense? I'll try to cook up an xfstest for > this. > > fs/btrfs/inode.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c > index 4e024260ad71..3dacf0786428 100644 > --- a/fs/btrfs/inode.c > +++ b/fs/btrfs/inode.c > @@ -3835,10 +3835,12 @@ static int btrfs_read_locked_inode(struct inode > *inode) > break; > case S_IFDIR: > inode->i_fop = &btrfs_dir_file_operations; > - if (root == fs_info->tree_root) > + if (root == fs_info->tree_root) { > inode->i_op = &btrfs_dir_ro_inode_operations; > - else > + inode->i_opflags &= ~IOP_XATTR; > + } else { > inode->i_op = &btrfs_dir_inode_operations; > + } > break; > case S_IFLNK: > inode->i_op = &btrfs_symlink_inode_operations; > @@ -5710,6 +5712,7 @@ static struct inode *new_simple_dir(struct super_block > *s, > > inode->i_ino = BTRFS_EMPTY_SUBVOL_DIR_OBJECTID; > inode->i_op = &btrfs_dir_ro_inode_operations; > + inode->i_opflags &= ~IOP_XATTR; > inode->i_fop = &simple_dir_operations; > inode->i_mode = S_IFDIR | S_IRUGO | S_IWUSR | S_IXUGO; > inode->i_mtime = current_time(inode); > -- > 2.11.0 >
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