Pull quota, ext2, reiserfs updates from Jan Kara:

 - support for path (instead of device) based quotactl syscall
   (quotactl_path(2))

 - ext2 conversion to kmap_local()

 - other minor cleanups & fixes

* tag 'for_v5.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  fs/reiserfs/journal.c: delete useless variables
  fs/ext2: Replace kmap() with kmap_local_page()
  ext2: Match up ext2_put_page() with ext2_dotdot() and ext2_find_entry()
  fs/ext2/: fix misspellings using codespell tool
  quota: report warning limits for realtime space quotas
  quota: wire up quotactl_path
  quota: Add mountpath based quota support

Use the fileattr API to let the VFS handle locking, permission checking and
conversion.

Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Jan Kara <jack@suse.cz>

The k[un]map() calls in ext2_[get|put]_page() are localized to a single
thread.  kmap_local_page() is more efficient.

Replace the kmap/kunmap calls with kmap_local_page()/kunmap_local().
kunmap_local() requires the mapping address so return that address from
ext2_get_page() to be used in ext2_put_page().  This works well because
many of the callers need the address anyway so it is not bad to return
it along with the page.

In addition, kmap_local_page()/kunmap_local() require strict nesting
rules to be followed.

Document the new nesting requirements of ext2_get_page() and
ext2_put_page() as well as the relationship between ext2_get_page(),
ext2_find_entry(), and ext2_dotdot().

Adjust one ext2_put_page() call site in ext2_rename() to ensure the new
nesting requirements are met.

Finally, adjust code style for checkpatch.

To: Jan Kara <jack@suse.com>
Link: https://lore.kernel.org/r/20210329065402.3297092-3-ira.weiny@intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Extend some inode methods with an additional user namespace argument. A
filesystem that is aware of idmapped mounts will receive the user
namespace the mount has been marked with. This can be used for
additional permission checking and also to enable filesystems to
translate between uids and gids if they need to. We have implemented all
relevant helpers in earlier patches.

As requested we simply extend the exisiting inode method instead of
introducing new ones. This is a little more code churn but it's mostly
mechanical and doesnt't leave us with additional inode methods.

Link: https://lore.kernel.org/r/20210121131959.646623-25-christian.brauner@ubuntu.com
Cc: Christoph Hellwig <hch@lst.de>
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>

There are 3 places in namei.c where the equivalent of ext2_put_page() is
open coded on a page which was returned from the ext2_get_page() call
[through the use of ext2_find_entry() and ext2_dotdot()].

Move ext2_put_page() to ext2.h and use it in namei.c

Also add a comment regarding the proper way to release the page returned
from ext2_find_entry() and ext2_dotdot().

Link: https://lore.kernel.org/r/20201112174244.701325-1-ira.weiny@intel.com
Signed-off-by: Ira Weiny <ira.weiny@intel.com>

Signed-off-by: Jan Kara <jack@suse.cz>

Change the repeated word "the" in "it the the" to "it is the".
Fix typo "recentl" to "recently".
Fix verb "give" to "gives".

Link: https://lore.kernel.org/r/20200720001327.23603-1-rdunlap@infradead.org
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Jan Kara <jack@suse.com>
Cc: linux-ext4@vger.kernel.org
Signed-off-by: Jan Kara <jack@suse.cz>

Remove useless nocheck option.

Link: https://lore.kernel.org/r/20200619073144.4701-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>

The same to commit <36de928641ee4> (ext4: propagate errors up to
ext4_find_entry()'s callers') in ext4, also return error instead of NULL
pointer in case of some error happens in ext2_find_entry() (e.g. -ENOMEM
or -EIO). This could avoid a negative dentry cache entry installed even
it failed to read directory block due to IO error.

Link: https://lore.kernel.org/r/20200608034043.10451-1-yi.zhang@huawei.com
Signed-off-by: zhangyi (F) <yi.zhang@huawei.com>
Signed-off-by: Jan Kara <jack@suse.cz>

Introduce new helper ext2_group_last_block_no() to calculate
last block num for specific block group, we can replace open
coded logic by calling this common helper.

Link: https://lore.kernel.org/r/20191104114036.9893-1-cgxu519@mykernel.net
Signed-off-by: Chengguang Xu <cgxu519@mykernel.net>
Signed-off-by: Jan Kara <jack@suse.cz>

Pull ext2 and udf fixes from Jan Kara:
 "A couple of fixes for udf and ext2. Namely:

   - fix making ext2 mountable (again) with 64k blocksize

   - fix for ext2 statx(2) handling

   - fix for udf handling of corrupted filesystem so that it doesn't get
     corrupted even further

   - couple smaller ext2 and udf cleanups"

* tag 'fs_for_v5.1-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: Drop pointless check from udf_sync_fs()
  ext2: support statx syscall
  udf: disallow RW mount without valid integrity descriptor
  udf: finalize integrity descriptor before writeback
  udf: factor out LVID finalization for reuse
  ext2: Fix underflow in ext2_max_size()
  ext2: Fix a typo in comment
  ext2: Remove redundant check for finding no group
  ext2: Annotate implicit fall through in __ext2_truncate_blocks
  ext2: Set superblock revision when enabling xattr feature
  ext2: Remove redundant check on s_inode_size
  ext2: set proper return code