The patchset implements the existing VFS ioctls for reading extended ioctl flags by btrfs.
There are many flags/attributes/extended/combined, the naming is confusing, so let's recap what we have: * generic VFS inode flags (i_flags) - S_* namespace https://elixir.bootlin.com/linux/v4.17-rc1/source/include/linux/fs.h#L1850 - FS_IOC_GETFLAGS, FS_IOC_SETFLAGS - tools: lsatrr, chattr * btrfs inode flags, on-disk format, independent of the above, with to/from conversions https://elixir.bootlin.com/linux/v4.17-rc1/source/fs/btrfs/ctree.h#L1416 * extended attributes, also called XATTR, but they're different entity, stored by an inode as key:value pairs - tools: getfattr, setfattr * XFLAGs, another interface to the generic S_* flags, new ioctl added because [GS]ETFLAGS is frozen, new bits added, eg. for project quotas or DAX, and more that originate in XFS features https://elixir.bootlin.com/linux/latest/source/include/uapi/linux/fs.h#L168 - tools: xfs_io -c lsattr, xfs_io -c chattr In the future, btrfs will probably get: - nodefrag -- eg. to disable autodefrag or defrag ioctl - nosymlinks -- for directories, prevent creating new symlinks - dax git://github.com/kdave/btrfs-devel dev/xflags David Sterba (7): btrfs: rename btrfs_update_iflags to reflect which flags it touches btrfs: rename btrfs_mask_flags to reflect which flags it touches btrfs: rename check_flags to reflect which flags it touches btrfs: rename btrfs_flags_to_ioctl to reflect which flags it touches btrfs: add helpers for FS_XFLAG_* conversion btrfs: add FS_IOC_FSGETXATTR ioctl btrfs: add FS_IOC_FSSETXATTR ioctl fs/btrfs/ctree.h | 2 +- fs/btrfs/inode.c | 4 +- fs/btrfs/ioctl.c | 185 +++++++++++++++++++++++++++++++++++++++++++++++++------ 3 files changed, 170 insertions(+), 21 deletions(-) -- 2.16.2 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
