• Christoph Hellwig's avatar
    dquot: move dquot initialization responsibility into the filesystem · 907f4554
    Christoph Hellwig authored
    Currently various places in the VFS call vfs_dq_init directly.  This means
    we tie the quota code into the VFS.  Get rid of that and make the
    filesystem responsible for the initialization.   For most metadata operations
    this is a straight forward move into the methods, but for truncate and
    open it's a bit more complicated.
    For truncate we currently only call vfs_dq_init for the sys_truncate case
    because open already takes care of it for ftruncate and open(O_TRUNC) - the
    new code causes an additional vfs_dq_init for those which is harmless.
    For open the initialization is moved from do_filp_open into the open method,
    which means it happens slightly earlier now, and only for regular files.
    The latter is fine because we don't need to initialize it for operations
    on special files, and we already do it as part of the namespace operations
    for directories.
    Add a dquot_file_open helper that filesystems that support generic quotas
    can use to fill in ->open.
    Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
    Signed-off-by: default avatarJan Kara <jack@suse.cz>
open.c 27.2 KB