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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
..
axtls-include py/py.mk: Build axtls library directly from its source files. 2018-09-08 00:07:23 +10:00
btstack extmod/modbluetooth: Add event for "indicate acknowledgement". 2020-07-20 23:26:41 +10:00
crypto-algorithms extmod/crypto-algorithms: Add source to header and populate copyright. 2019-08-22 17:20:16 +10:00
lwip-include all: Unify header guard usage. 2017-07-18 11:57:39 +10:00
nimble extmod/modbluetooth: Add event for "indicate acknowledgement". 2020-07-20 23:26:41 +10:00
re1.5 extmod/re1.5: Support escaping within RE classes. 2019-10-18 12:20:32 +11:00
uasyncio extmod/uasyncio: Truncate negative sleeps to 0. 2020-08-22 12:17:06 +10:00
uzlib extmod/uzlib: Explicitly cast ptr-diff-expr to unsigned. 2019-12-23 00:07:03 +11:00
webrepl all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
extmod.mk py/stream: Remove mp_stream_errno and use system errno instead. 2020-04-27 23:58:46 +10:00
machine_i2c.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
machine_i2c.h extmod/machine_i2c: Change C-level API to allow split I2C transactions. 2019-05-20 15:04:29 +10:00
machine_mem.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
machine_mem.h all: Use the name MicroPython consistently in comments 2017-07-31 18:35:40 +10:00
machine_pinbase.c extmod/machine_pinbase: Put PinBase singleton in ROM. 2017-09-12 16:00:21 +10:00
machine_pinbase.h all: Unify header guard usage. 2017-07-18 11:57:39 +10:00
machine_pulse.c esp8266: Provide custom machine_time_pulse_us that feeds soft WDT. 2019-07-01 22:53:00 +10:00
machine_pulse.h all: Unify header guard usage. 2017-07-18 11:57:39 +10:00
machine_signal.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
machine_signal.h all: Unify header guard usage. 2017-07-18 11:57:39 +10:00
machine_spi.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
machine_spi.h drivers/bus: Pull out software SPI implementation to dedicated driver. 2018-03-10 00:59:43 +11:00
misc.h extmod/uos_dupterm: Add mp_uos_dupterm_poll to poll all dupterms. 2019-07-01 17:10:12 +10:00
modbluetooth.c extmod/modbluetooth: Add event for "indicate acknowledgement". 2020-07-20 23:26:41 +10:00
modbluetooth.h extmod/modbluetooth: Add event for "indicate acknowledgement". 2020-07-20 23:26:41 +10:00
modbluetooth_hci.h stm32: Refactor Bluetooth HCI RX to be independent of transport layer. 2020-03-10 01:53:42 +11:00
modbtree.c extmod/modbtree: Retain reference to underlying stream so it's not GC'd. 2020-05-02 16:08:04 +10:00
modframebuf.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
modlwip.c all: Fix implicit floating point to integer conversions. 2020-04-18 22:42:24 +10:00
modonewire.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
moduasyncio.c all: Clean up error strings to use lowercase and change cannot to can't. 2020-04-13 22:19:37 +10:00
modubinascii.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
moducryptolib.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
moductypes.c extmod/moductypes: Use mp_obj_is_dict_or_ordereddict to simplify code. 2020-06-24 12:05:00 +10:00
moduhashlib.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
moduheapq.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
modujson.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
modurandom.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
modure.c extmod/ure: Use single function for match/search/sub. 2020-06-08 09:16:09 +02:00
moduselect.c all: Fix implicit floating point promotion. 2020-04-18 22:36:14 +10:00
modussl_axtls.c extmod/modussl: Improve exception error messages. 2020-07-20 23:41:45 +10:00
modussl_mbedtls.c extmod/modussl_mbedtls: Integrate shorter error strings. 2020-07-21 00:31:05 +10:00
modutimeq.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
moduwebsocket.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
moduwebsocket.h extmod/moduwebsocket: Refactor `websocket` to `uwebsocket`. 2019-02-14 00:35:45 +11:00
moduzlib.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
modwebrepl.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
network_cyw43.c all: Format code to add space after C++-style comment start. 2020-04-23 11:24:25 +10:00
network_cyw43.h extmod: Add network-level class binding to cyw43 driver. 2019-06-03 16:47:35 +10:00
uos_dupterm.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
utime_mphal.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
utime_mphal.h all: Unify header guard usage. 2017-07-18 11:57:39 +10:00
vfs.c extmod/vfs: Retain previous working directory if chdir fails. 2020-05-29 23:05:01 +10:00
vfs.h extmod/vfs: Factor out vfs mount-and-chdir helper from stm32. 2020-03-11 14:24:26 +11:00
vfs_blockdev.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
vfs_fat.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
vfs_fat.h extmod: Factor out block-device struct to make independent of fatfs. 2019-10-29 12:12:37 +11:00
vfs_fat_diskio.c tools/uncrustify: Enable more opts to remove space between func and '('. 2020-06-19 22:07:32 +10:00
vfs_fat_file.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
vfs_lfs.c extmod/vfs_lfs: Add mtime support to littlefs files. 2020-08-25 17:35:19 +10:00
vfs_lfs.h extmod: Add VFS littlefs bindings. 2019-10-29 14:17:29 +11:00
vfs_lfsx.c extmod/vfs_lfs: Add mtime support to littlefs files. 2020-08-25 17:35:19 +10:00
vfs_lfsx_file.c extmod/vfs_lfs: Add mtime support to littlefs files. 2020-08-25 17:35:19 +10:00
vfs_posix.c unix: Implement PEP 475 to retry syscalls failing with EINTR. 2020-03-27 14:40:46 +11:00
vfs_posix.h extmod/vfs: Introduce a C-level VFS protocol, with fast import_stat. 2018-06-06 14:33:42 +10:00
vfs_posix_file.c all: Use MP_ERROR_TEXT for all error messages. 2020-04-05 15:02:06 +10:00
vfs_reader.c extmod/vfs_reader: Fix mp_reader_new_file to open file in "rb" mode. 2020-08-12 23:40:50 +10:00
virtpin.c all: Reformat C and Python source code with tools/codeformat.py. 2020-02-28 10:33:03 +11:00
virtpin.h all: Unify header guard usage. 2017-07-18 11:57:39 +10:00