Summary:
This diff adds a gflag option to turn on `TreeOverlay`. As this diff, this
option only works on Windows.
Reviewed By: xavierd
Differential Revision: D25223471
fbshipit-source-id: ccab4c85cf4b08980e67814238457a8eb83af3dc
Summary:
We don't need to care if a directory from overlay exists or just empty. This saves the overlay implementation from keeping track of what directories are stored and which are not.
This diff changes `Overlay::loadOverlayDir` to return `DirContents` instead of `std::optional`. The same method on `IOverlay` remain unchanged to give the backing overlay implementation the freedom to choose.
Reviewed By: chadaustin
Differential Revision: D25507406
fbshipit-source-id: f7edcc55485fabeedfe11e9f269eea15a3cc32ad
Summary:
To support the new _Relational Overlay_, we need to know what is actually being
modified by overlay. This diff adds two method `addChild` and `removeChild` to
IOverlay that supports passing such information to the actual implementation.
Reviewed By: chadaustin
Differential Revision: D24153544
fbshipit-source-id: 04e5f4c231ff9b5fe0ee5be082b1a75d78758bb4
Summary:
This diff introduce `IOverlay` that provides a shared interface between
`FSOverlay` and `SqliteOverlay`. This allows us to share more code between
POSIX and Windows, and prepare for the new SQLite-backed Overlay
implementation.
Note as of this diff `IOverlay` is only at a very initial version. The
interface is far from complete and still need a few iteration to change.
Reviewed By: chadaustin
Differential Revision: D23941454
fbshipit-source-id: 69cce9d3852f21b2d19f528e7e05fb183538ace9
Summary:
It would be nice to see if there was a fsck on startup, the duration of the fsck, and if it was able to repair all of the problems or not. This diff adds external logging for fsck runs on daemon start.
duration: how long the fsck took
success: false if was not able to repair errors, true if repaired all errors or didn't have to repair at all
attempted_repair: true if we found problems, false otherwise
Reviewed By: chadaustin
Differential Revision: D24774065
fbshipit-source-id: 2fa911652abec889299c74aaa2d53718ed3b4f92
Summary:
The EdenFS codebase uses folly/logging/xlog to log, but we were still relying
on glog for the various CHECK macros. Since xlog also contains equivalent CHECK
macros, let's just rely on them instead.
This is mostly codemodded + arc lint + various fixes to get it compile.
Reviewed By: chadaustin
Differential Revision: D24871174
fbshipit-source-id: 4d2a691df235d6dbd0fbd8f7c19d5a956e86b31c
Summary:
These shows up on Windows when building with mode/win, silencing them is easy,
so let's do it.
Reviewed By: wez
Differential Revision: D23871727
fbshipit-source-id: 7d7ea9504c397b72903e98967188a5295f2f1040
Summary:
This commit moves a compile-time template parameter
to be a runtime boolean parameter.
There's a bit of fan-out that, while I don't think it is
super awesome, isn't super terrible either.
The case sensitivity value is read from the checkout config
added in the prior diff in this stack.
Reviewed By: xavierd
Differential Revision: D23751192
fbshipit-source-id: 46f6fe25bfa6666305096ad9c416b510cd3aac8f
Summary:
Since the Stub.h now only contains NOT_IMPLEMENTED, let's move it to its own
header outside of the win directory.
Reviewed By: genevievehelsel
Differential Revision: D23696244
fbshipit-source-id: 2dfc3204707e043ee6c89595668c484e0fa8c0d0
Summary:
We are unifying C++ APIs for accessing optional and unqualified fields:
https://fb.workplace.com/groups/1730279463893632/permalink/2541675446087359/.
This diff migrates code from accessing data members generated from unqualified
Thrift fields directly to the `field_ref` API, i.e. replacing
```
thrift_obj.field
```
with
```
*thrift_obj.field_ref()
```
The `_ref` suffixes will be removed in the future once data members are private
and names can be reclaimed.
The output of this codemod has been reviewed in D20039637.
The new API is documented in
https://our.intern.facebook.com/intern/wiki/Thrift/FieldAccess/.
drop-conflicts
Reviewed By: simpkins
Differential Revision: D23465292
fbshipit-source-id: bb9df3ad183685fae28173da7275e6ecd34df048
Summary:
The StringConv.h header contains many functions to convert from Windows paths
to Eden's path (and vice versa) to workaround the fact that Eden's path don't
support wide strings that Windows uses. Let's simply add support for these wide
strings in PathFuncs so we can greatly simplify all the call sites. Instead of
calling "edenToWinName(winstr)", "PathComponent(winstr)" is both more
descriptive and more idiomatic.
To be fair, I'm not entirely a fan of the approach taken in this diff, as this
adds Windows specific code to PathFuncs.h, but I feel that the benefit is too
big to not do that.
Reviewed By: chadaustin
Differential Revision: D23004523
fbshipit-source-id: 3a1507e398a66909773251907db01e06603b91dd
Summary:
We are unifying C++ APIs for accessing optional and unqualified fields:
https://fb.workplace.com/groups/1730279463893632/permalink/2541675446087359/.
This diff migrates code from accessing data members generated from unqualified
Thrift fields directly to the `field_ref` API, i.e. replacing
```
thrift_obj.field
```
with
```
*thrift_obj.field_ref()
```
The `_ref` suffixes will be removed in the future once data members are private
and names can be reclaimed.
The output of this codemod has been reviewed in D20039637.
The new API is documented in
https://our.intern.facebook.com/intern/wiki/Thrift/FieldAccess/.
drop-conflicts
Reviewed By: yfeldblum
Differential Revision: D22631599
fbshipit-source-id: 9bfcaeb636f34a32fd871c7cd6a2db4a7ace30bf
Summary: This diff defines `Overlaychecker::ProgressCallback` to replace repetitive function type declaration.
Reviewed By: genevievehelsel
Differential Revision: D22243160
fbshipit-source-id: ea05e451817a760b5266879b956eaea48dc8d85e
Summary: This diff passes a callback function `progressCallback` from `EdenServer` to make `OverlayChekcer` print fsck messages to stdout.
Reviewed By: fanzeyi
Differential Revision: D21966060
fbshipit-source-id: 317b2c8954c718b51b5295c9f8d7698eb203906e
Summary: This diff fixes `'__isset' is deprecated` problem when building `//eden/fs/service:edenfs`
Reviewed By: simpkins
Differential Revision: D21966922
fbshipit-source-id: c3b12134f3f84db0a97f3975dae5d64a2c98641a
Summary:
Thrift setter API is deprecated since it doesn't bring any value over direct assignment. Removing it can reduce build-time and make our codebase more consistent.
If result of `s.set_foo(bar)` is unused, this diff replaces
s.set_foo(bar);
with
s.foo_ref() = bar;
Otherwise, it replaces
s.set_foo(bar)
with
s.foo_ref().emplace(bar)
Reviewed By: chadaustin
Differential Revision: D21712029
fbshipit-source-id: 3a332b4bf6fac6b3cf396d34e6d5ca4849181a6d
Summary: Fix some RVO warnings and a compilation error when compiling with gcc.
Reviewed By: xavierd
Differential Revision: D21481738
fbshipit-source-id: 0621f5886df40c24ef1a6a68ccd957e38f2f4122
Summary:
On Windows, we've had a couple of cases where the overlay is corrupted which
prevent remounting EdenFS. In this case, one entry of a directory was an empty
path. Let's try to catch the error when it happens, instead of after the fact.
Reviewed By: wez
Differential Revision: D21443002
fbshipit-source-id: 47e59aee803cc0b4befd6e0585836d5c68e905b1
Summary:
This diff introduces a sqlite based overlay, which stores the directory inode and its entries in the sqlite database. This is similar to FsOverlay but doesn't support all the functionality. Sqlite overlay in this diff is only designed to handles the requirement for Eden on Windows.
We did not build sqlite overlay as a virtual class because as of this diff the interface and functionality of this is different from fsOverlay.
Reviewed By: simpkins
Differential Revision: D20480870
fbshipit-source-id: c87cb2ffd11c6c0c7a10bc8dfaf6164e0e442b2b
Summary:
I have a suspicion that most edenfs starts are unclean. To test that
hypothesis, add a "mount" structured event type that records whether
the mount was cleanly shut down, how long mounting took, and whether
it's a graceful restart.
Reviewed By: genevievehelsel
Differential Revision: D19585161
fbshipit-source-id: 16eedfeb6181742e64b45bca1ed3cce3edb663cb
Summary:
In the case that the overlay was closed before the initial
createOverlayFile, prevent an invalid OverlayFile from being accessed,
causing the test to fail.
Reviewed By: genevievehelsel
Differential Revision: D19591636
fbshipit-source-id: 9d961f044c3b68b5c0b2dcd108ff85db6326276d
Summary:
Reduce the log level for a few messages to help reduce some less important
clutter when running with an elevated debug log level.
Reviewed By: chadaustin
Differential Revision: D19188773
fbshipit-source-id: 396bb15e119fc12765ecbc707e7a1dadbdd02422
Summary:
Throw errors if a read or write is called on the `Overlay` class after `close()` has been called. Adds IO reference counting to know when it is safe to release the overlay lock after calling `close()`
This takes care to catch errors that could be thrown around overlay IO and makes sure to correctly decrement the IO count in the case of errors.
Reviewed By: chadaustin
Differential Revision: D17957360
fbshipit-source-id: af5e3c3f98c77800914d03cd748fb2f1c59ae264
Summary: changes `overlay_` to be stored as a `std::shared_ptr` in order to safely create and pass `std::weak_ptr`s of the overlay to OverlayFiles that are being created.
Reviewed By: chadaustin
Differential Revision: D18302732
fbshipit-source-id: 495b613914771714ba8a8d1beb1c7a0cd72b33d4
Summary: This file wrapper is returned instead of a `folly::File` when talking with the `Overlay`. This is basework for supporting closing the `Overlay` class even if it is still in use so file modifications on files given from the `Overlay` can be denied if the `Overlay` is closed.
Reviewed By: chadaustin
Differential Revision: D17973664
fbshipit-source-id: e4b9778b3a830b6310fda4a9e66b459530b9fe17
Summary:
This diff passes the free space information through from
the overlay lock file descriptor back up to the kernel when the
filesystem stats are requested.
This makes the user experience with eg: Finder on macOS nicer.
Reviewed By: chadaustin
Differential Revision: D17255859
fbshipit-source-id: ed9f3b9fd386c5706539879513854a9cd1550d8a
Summary:
Use the new `OverlayChecker` class to automatically scan for errors and
attempt to repair them if the overlay was not shutdown cleanly the previous
time it was used.
Reviewed By: wez
Differential Revision: D16596601
fbshipit-source-id: 9923565b101ba953e92909e502be6ef5895c5cbd
Summary:
Fix `FsOverlay::initOverlay()` to also create the `tmp` subdirectory, which is
required for the `FsOverlay` code to function properly. Previously this
directory was created by the `Overlay` class. However, `FsOverlay` should be
responsible for creating it so it can be used from other locations besides
just `Overlay`.
I also removed the code that checks if the `tmp` directory needs to be created
on restart. The code to create `tmp` has been present for over a year
(D8330070), and we no longer have anyone using EdenFS versions older than
this.
Reviewed By: strager
Differential Revision: D16577700
fbshipit-source-id: 3eaa28003159a03084c4f367c7b96d69fc1702d0
Summary:
Update the copyright & license headers in C++ files to reflect the
relicensing to GPLv2
Reviewed By: wez
Differential Revision: D15487078
fbshipit-source-id: 19f24c933a64ecad0d3a692d0f8d2a38b4194b1d
Summary: Fallout from another diff that never got landed.
Reviewed By: simpkins
Differential Revision: D14938191
fbshipit-source-id: 980728ca6a1d4c4f90fea46aac9525a03d9809e5
Summary:
In this change, we separate the low-level code that manipulates the overlay
into the FsOverlay class. The Overlay class makes use of the FsOverlay and
InodeMetaData table to support its Overlay interfaces. The FsOverlay class
is decoupled from the Overlay class, allowing other classes to manipulate
the overlay independently. We have a need for this in order to add
fsck to the c++ code base : described in T40728883.
Reviewed By: simpkins
Differential Revision: D14218281
fbshipit-source-id: 66c587f2b341579b8075ca5e5eeb4da6ffadf6f5
Summary:
Update `Overlay::initialization()` to perform the bulk of the initialization
logic in the GC thread. We re-use the GC thread simply for convenience, since
it already exists and won't have any work to do until initialization has
completed anyway.
After an unclean shutdown this allows edenfs to start and perform the overlay
scans for all of its checkouts in parallel rather than serially.
Reviewed By: wez
Differential Revision: D14154868
fbshipit-source-id: c177cb9f950a6317fd7ea06888bd5b326a55ace7
Summary:
Add an Overlay::initialize() function, and consolidate all Overlay
initializtion logic in this function. Previously some initialization was done
by the Overlay constructor, and some was done in `EdenMount::initialize()`
Overlay::initialize() returns a folly::SemiFuture as it may perform a
non-trivial amount of disk I/O. However, at the moment it currently performs
all I/O in the current thread before it returns. I plan to move this work to
a separate thread in a subsequent diff.
Reviewed By: strager
Differential Revision: D13981140
fbshipit-source-id: b59eaef88012a8e74fcb770a9c93ca3f9bde32a0
Summary:
getInitialMode and getModeUnsafe were not inherently different, so
remove getModeUnsafe and write an accurate comment in Overlay's
serialization code about why the initial mode is saved and how we
could remove that logic in the future.
Reviewed By: strager
Differential Revision: D14007488
fbshipit-source-id: db42f45f00dcd213fabd9575360da1261931778b
Summary:
Migrate the code from accessing optional Thrift fields directly to a safer
`optional_field_ref` API. See https://fburl.com/safe for more details.
The output of this codemod has been reviewed in D13259011.
To preserve semantics, each unchecked access is replaced with an explicit call
to `value_unchecked()`. If you are sure that accessing a field is safe (the
field is marked as set), you can later replace `value_unchecked()` with
`value()` or dereferencing (`operator *`):
```
ThriftStruct s = ...
- auto foo = s.foo_ref().value_unchecked();
+ auto foo = *s.foo_ref(); // will throw if s.foo is unset
```
Reviewed By: chadaustin
Differential Revision: D13684410
fbshipit-source-id: 919de4ddf89e7f0463f2614baba4bfbac1c8255c
Summary:
If a file in the overlay is truncated unexpectedly, reads on it would
fail with EIO and a log message of "std::out_of_range: string
underflow" which wasn't helpful. Instead, use the same truncated file
detection as directories use.
Reviewed By: strager
Differential Revision: D13627565
fbshipit-source-id: 246f2659ba139e8f7adb7d556719e5ead9d84ebd
Summary:
Thankfully, we can simply remove it; it is really just a performance
optimization that we can enable for linux.
Reviewed By: simpkins
Differential Revision: D13475719
fbshipit-source-id: 09b60dcf995c2c5390b91aa316c62ca1b4d3f944
Summary:
Eden has used the InodeMetadataTable as the authoritative source for
timestamp metadata for over six months. I think we can safely assume
that anyone at this point who has old inodes in the overlay that don't
have corresponding entries in the inode metadata table are fine with
those timestamps being reset to the last checkout time.
Reviewed By: strager
Differential Revision: D13144735
fbshipit-source-id: 06a9a8835ea83c98fb6a165e4c8d5c3c6b28ad84
Summary:
Eden has used the InodeMetadataTable as the primary source of
timestamp data for more than six months. Stop writing timestamps into
the overlay, since they will never be used.
Reviewed By: strager
Differential Revision: D13144696
fbshipit-source-id: e36423036228e89dd2a986e6bacfa74553c17a92
Summary:
If the overlay file for a directory is corrupted (e.g. empty), Overlay::scanForNextInodeNumber throws. This causes Eden to crash on start [1]. Fix the crash by ignoring corrupted directories.
[1] `test_mount_possible_after_corrupt_directory_and_cached_next_inode_number` reproduces this crash.
Reviewed By: chadaustin
Differential Revision: D9806105
fbshipit-source-id: 1b95083b6a6aa253a2296d6f754edbf4b9f64734
Summary:
Eden keeps track of the the highest-allocated inode number using the next-inode-number file. The TODO comment in Overlay::scanForNextInodeNumber is thus out of date. Delete the outdated comment since the feature has already been implemented.
This diff should not change behavior.
Reviewed By: chadaustin
Differential Revision: D9806107
fbshipit-source-id: f546eb179b86a11a6c4bf0d5f945dc7dbbf29160
Summary:
The desired end state for how next inode number gets passed across
takeover. This should not land as is - the prior diffs need to land
and wait for a while until everyone transitions.
Reviewed By: simpkins
Differential Revision: D8195550
fbshipit-source-id: 2fc40f881cc1a331df95ef99f7e9e4f2e69c8643
Summary:
Now that timestamps are read from the inode metadata table, and users
aren't likely to run a pre-metadata-table version, the timestamp data
in the overlay header's no longer needs to be written. So remove that
code which has the bonus of making unloading faster.
Reviewed By: wez
Differential Revision: D9318044
fbshipit-source-id: 27a9a9ee954003940209819466932237a81f8929
Summary:
The root inode is particularly important, so always call `fdatasync()` on its
changes in the overlay before committing them.
This will hopefully reduce the number of cases we see where users have empty
or corrupt data for the root inode after hard rebooting their server. My
guess is that the root directory is being modified by hg or other tools
creating and removing temporary files in the root directory. If a change like
this is in progress when a hard reboot has been performed we risk data loss
without the `fdatasync()` call.
While Eden can still mostly serve the checkout data if other files or
directories are corrupt/missing in the overlay it currently is completely
unable to mount the checkout if the root overlay is corrupt. Therefore it
seems worth being more cautious about making sure that the root overlay data
is updated atomically.
Reviewed By: chadaustin, wez
Differential Revision: D9275852
fbshipit-source-id: b1e3eeb94ba670d0e2b52da4af7143d3ddbc919b
