Commit Graph

15 Commits

Author SHA1 Message Date
Damien George 03a1f94ea1 extmod/vfs_lfs: Support mounting LFS filesystems in read-only mode.
Signed-off-by: Damien George <damien@micropython.org>
2020-10-29 11:43:52 +11:00
Damien George 8f20cdc353 all: Rename absolute time-based functions to include "epoch".
For time-based functions that work with absolute time there is the need for
an Epoch, to set the zero-point at which the absolute time starts counting.
Such functions include time.time() and filesystem stat return values.  And
different ports may use a different Epoch.

To make it clearer what functions use the Epoch (whatever it may be), and
make the ports more consistent with their use of the Epoch, this commit
renames all Epoch related functions to include the word "epoch" in their
name (and remove references to "2000").

Along with this rename, the following things have changed:

- mp_hal_time_ns() is now specified to return the number of nanoseconds
  since the Epoch, rather than since 1970 (but since this is an internal
  function it doesn't change anything for the user).

- littlefs timestamps on the esp8266 have been fixed (they were previously
  off by 30 years in nanoseconds).

Otherwise, there is no functional change made by this commit.

Signed-off-by: Damien George <damien@micropython.org>
2020-09-18 17:20:34 +10:00
Damien George 2a72e90ab8 extmod/vfs: Add option to use 1970 as Epoch.
By setting MICROPY_EPOCH_IS_1970 a port can opt to use 1970/1/1 as the
Epoch for timestamps returned by stat().  And this setting is enabled on
the unix and windows ports because that's what they use.

Signed-off-by: Damien George <damien@micropython.org>
2020-09-01 12:36:28 +10:00
Damien George c70e599659 extmod/vfs: Support larger integer range in VFS stat time fields.
On ports like unix where the Epoch is 1970/1/1 and atime/mtime/ctime are in
seconds since the Epoch, this value will overflow a small-int on 32-bit
systems.  So far this is only an issue on 32-bit unix builds that use the
VFS layer (eg dev and coverage unix variants) but the fix (using
mp_obj_new_int_from_uint instead of MP_OBJ_NEW_SMALL_INT) is there for all
ports so as to not complicate the code, and because they will need the
range one day.

Also apply a similar fix to other fields in VfsPosix.stat because they may
also be large.

Signed-off-by: Damien George <damien@micropython.org>
2020-09-01 12:36:28 +10:00
Damien George 2acc087880 extmod/vfs_lfs: Add mtime support to littlefs files.
This commit adds support for modification time of files on littlefs v2
filesystems, using file attributes.  For some background see issue #6114.

Features/properties of this implementation:
- Only supported on littlefs2 (not littlefs1).
- Uses littlefs2's general file attributes to store the timestamp.
- The timestamp is 64-bits and stores nanoseconds since 1970/1/1 (if the
  range to the year 2554 is not enough then additional bits can be added to
  this timestamp by adding another file attribute).
- mtime is enabled by default but can be disabled in the constructor, eg:
  uos.mount(uos.VfsLfs2(bdev, mtime=False), '/flash')
- It's fully backwards compatible, existing littlefs2 filesystems will work
  without reformatting and timestamps will be added transparently to
  existing files (once they are opened for writing).
- Files without timestamps will open correctly, and stat will just return 0
  for their timestamp.
- mtime can be disabled or enabled each mount time and timestamps will only
  be updated if mtime is enabled (otherwise they will be untouched).

Signed-off-by: Damien George <damien@micropython.org>
2020-08-25 17:35:19 +10:00
Damien George 0c77668d11 extmod/vfs_lfs: Fix littlefs bindings to build in nan-box mode.
Signed-off-by: Damien George <damien@micropython.org>
2020-06-25 16:32:48 +10:00
Damien George 7dffbfd22a extmod/vfs_lfsx: Fix import_stat so it takes into account current dir.
CPython semantics require searching the current directory if the import is
not absolute (when "" is in sys.path).

Fixes issue #6037.
2020-05-15 11:31:32 +10:00
robert 0f83ef395c extmod/vfs_lfsx: Fix rename to respect cur dir for new path.
If the new name start with '/', cur_dir is not prepened any more, so that
the current working directory is respected.  And extend the test cases for
rename to cover this functionality.
2020-05-08 21:54:04 +10:00
robert d3ea28d04a extmod/vfs_lfsx: Normalize path name in chdir.
This change scans for '.', '..' and multiple '/' and normalizes the new
path name.  If the resulting path does not exist, an error is raised.
Non-existing interim path elements are ignored if they are removed during
normalization.
2020-05-08 21:52:15 +10:00
robert a5ea4b9f3f extmod/vfs_lfsx: Fix path handling in uos.stat() to consider cur dir.
This fixes the bug, that stat(filename) would not consider the current
working directory.  So if e.g. the cwd is "lib", then stat("main.py") would
return the info for "/main.py" instead of "/lib/main.py".
2020-05-08 21:37:51 +10:00
Damien George 69661f3343 all: Reformat C and Python source code with tools/codeformat.py.
This is run with uncrustify 0.70.1, and black 19.10b0.
2020-02-28 10:33:03 +11:00
Damien George 5634a31a98 extmod/vfs_lfs: Pass flag along to ioctl when init'ing bdev for lfs.
To hint to the block device that the extended block protocol will be used.
2019-11-26 00:07:42 +11:00
Damien George 4cf054a130 extmod/vfs: Add MP_BLOCKDEV_IOCTL_BLOCK_ERASE constant. 2019-10-29 14:17:29 +11:00
Damien George cfe1c5abf8 extmod/vfs: Rename BP_IOCTL_xxx constants to MP_BLOCKDEV_IOCTL_xxx.
Also rename SEC_COUNT to BLOCK_COUNT and SEC_SIZE to BLOCK_SIZE.
2019-10-29 14:17:29 +11:00
Damien George a099505420 extmod: Add VFS littlefs bindings.
Both LFS1 and LFS2 are supported at the same time.
2019-10-29 14:17:29 +11:00