Commit Graph

104 Commits

Author SHA1 Message Date
Simon Frei
2ab2488274
lib/scanner: Fix ticker leak in scanner (fixes #9417) (#9451)
Move the ticker closer to where it's used and defer stop it to avoid
missing a branch.

Fixes regression introduced in
2f3eacdb6c

Fixes https://github.com/syncthing/syncthing/issues/9417
2024-03-05 19:04:26 +01:00
Jakob Borg
3297624037
lib/ignore: Optimise ignoring directories for filesystem watcher (fixes #9339) (#9340)
This improves the ignore handling so that directories can be fully
ignored (skipped in the watcher) in more cases. Specifically, where the
previous rule was that any complex `!`-pattern would disable skipping
directories, the new rule is that only matches on patterns *after* such
a `!`-pattern disable skipping. That is, the following now does the
intuitive thing:

```
/foo
/bar
!whatever
*
```

- `/foo/**` and `/bar/**` are completely skipped, since there is no
chance anything underneath them could ever be not-ignored
- `!whatever` toggles the "can't skip directories any more" flag
- Anything that matches `*` can't skip directories, because it's
possible we can have `whatever` match something deeper.

To enable this, some refactoring was necessary:

- The "can skip dirs" flag is now a property of the match result, not of
the pattern set as a whole.
- That meant returning a boolean is not good enough, we need to actually
return the entire `Result` (or, like, two booleans but that seemed
uglier and more annoying to use)
- `ShouldIgnore(string) boolean` went away with
`Match(string).IsIgnored()` being the obvious replacement (API
simplification!)
- The watcher then needed to import the `ignore` package (for the
`Result` type), but `fs` imports the watcher and `ignore` imports `fs`.
That's a cycle, so I broke out `Result` into a package of its own so
that it can be safely imported everywhere in things like `type Matcher
interface { Match(string) result.Result }`. There's a fair amount of
stuttering in `result.Result` and maybe we should go with something like
`ignoreresult.R` or so, leaving this open for discussion.

Tests refactored to suit, I think this change is in fact quite well
covered by the existing ones...

Also some noise because a few of the changed files were quite old and
got the `gofumpt` treatment by my editor. Sorry not sorry.

---------

Co-authored-by: Simon Frei <freisim93@gmail.com>
2024-01-15 10:13:22 +00:00
Julian Lehrhuber
8edd67a569
lib/scanner: Prevent sync-conflict for receive-only local modifications (#9323)
### Purpose

This PR changes behaviour of syncthing related to `receive-only`
folders, which I believe to be a bug since I wouldn't expect the current
behaviour. With the current syncthing codebase, a file of a
`receive-only` folder that is only modified locally can cause the
creation of a `.sync-conflict` file.

### Testing

Consider this szenario: Setup two paired clients that sync a folder with
a given file (e.g. `Test.txt`). One of the clients configures the folder
to be `receive-only`. Now, change the contents of the file for the
receive-only client **_twice_**.

With the current syncthing codebase, this leads to the creation of a
`.sync-conflict` file that contains the modified contents, while the
regular `Test.txt` file is reset to the cluster's provided contents.
This is due to a `protocol.FileInfo#ShouldConflict` check, that is
succeeding on the locally modified file.

This PR changes this behaviour to not reset the file and not cause the
creation of a `.sync-conflict`. Instead, the second content update is
treated the same as the first content update.

This PR also contains a test that fails on the current codebase and
succeeds with the changes introduced in this PR.

### Screenshots

This is not a GUI change

### Documentation

This is not a user visible change.

## Authorship

Your name and email will be added automatically to the AUTHORS file
based on the commit metadata.

#### Thanks to all the syncthing folks for this awesome piece of
software!
2024-01-08 10:29:20 +01:00
Simon Frei
2f3eacdb6c
gui, lib/scanner: Improve scan progress indication (ref #8331) (#9308) 2023-12-31 23:01:16 +01:00
Jakob Borg
d51760f410
lib/scanner: Record inode change time for directories and symlinks (#9250) 2023-12-04 07:48:24 +01:00
Jakob Borg
b9c08d3814
all: Add Prometheus-style metrics to expose some internal performance counters (fixes #5175) (#9003) 2023-08-04 19:57:30 +02:00
greatroar
38f2b34d29
all: Use new Go 1.19 atomic types (#8772) 2023-02-07 12:07:34 +01:00
Jakob Borg
ed588ce335
lib/scanner: More sensible debug output (#8596)
Previous debug input didn't really give enough info to show what was
happening, while it also printed full block lists which are enormously
verbose. Now it consistently prints 1. what it sees on disk, 2. what it
got from CurrentFile (without blocks), 3. the action taken on that file.
2022-10-13 19:32:58 +02:00
Jakob Borg
6cac308bcd
all: Support syncing extended attributes (fixes #2698) (#8513)
This adds support for syncing extended attributes on supported
filesystem on Linux, macOS, FreeBSD and NetBSD. Windows is currently
excluded because the APIs seem onerous and annoying and frankly the uses
cases seem few and far between. On Unixes this also covers ACLs as those
are stored as extended attributes.

Similar to ownership syncing this will optional & opt-in, which two
settings controlling the main behavior: one to "sync" xattrs (read &
write) and another one to "scan" xattrs (only read them so other devices
can "sync" them, but not apply any locally).

Co-authored-by: Tomasz Wilczyński <twilczynski@naver.com>
2022-09-14 09:50:55 +02:00
Jakob Borg
06273875ae
all: Make scanning ownership opt-in (#8497) 2022-08-12 07:47:20 +02:00
Jakob Borg
a3c724f2c3
all: Add build constants for runtime.GOOS comparisons (#8442)
all: Add package runtimeos for runtime.GOOS comparisons

I grew tired of hand written string comparisons. This adds generated
constants for the GOOS values, and predefined Is$OS constants that can
be iffed on. In a couple of places I rewrote trivial switch:es to if:s,
and added Illumos where we checked for Solaris (because they are
effectively the same, and if we're going to target one of them that
would be Illumos...).
2022-07-28 19:36:39 +02:00
deepsource-autofix[bot]
5130c414da
all: Unused parameter should be replaced by underscore (#8464)
Co-authored-by: deepsource-autofix[bot] <62050782+deepsource-autofix[bot]@users.noreply.github.com>
2022-07-28 17:17:29 +02:00
Jakob Borg
adce6fa473
all: Support syncing ownership (fixes #1329) (#8434)
This adds support for syncing ownership on Unixes and on Windows. The
scanner always picks up ownership information, but it is not applied
unless the new folder option "Sync Ownership" is set.

Ownership data is stored in a new FileInfo field called "platform data". This
is intended to hold further platform-specific data in the future
(specifically, extended attributes), which is why the whole design is a
bit overkill for just ownership.
2022-07-26 08:24:58 +02:00
Simon Frei
93a02c677e
lib/scanner: Do not drop all not-exist-errors and debug logging (#7675) 2021-05-15 11:51:35 +02:00
Simon Frei
1a00ea7c6e
lib: Prevent using protocol method with native path (fixes #7557) (#7563) 2021-04-11 15:29:43 +02:00
Simon Frei
78c2844e3f
lib/scanner: Pass on errors while hashing (#7380) 2021-02-19 08:51:39 +01:00
Simon Frei
31559e908b
all: Add untrusted folders behind feature flag (ref #62) (#7055) 2020-11-09 15:33:32 +01:00
Audrius Butkevicius
e027175446
all: Move remaining protos to use the vanity plugin (#7009) 2020-10-02 08:07:05 +02:00
Simon Frei
932d8c69de lib/fs: Properly handle case insensitive systems (fixes #1787, fixes #2739, fixes #5708)
With this change we emulate a case sensitive filesystem on top of
insensitive filesystems. This means we correctly pick up case-only renames
and throw a case conflict error when there would be multiple files differing
only in case.

This safety check has a small performance hit (about 20% more filesystem
operations when scanning for changes). The new advanced folder option
`caseSensitiveFS` can be used to disable the safety checks, retaining the
previous behavior on systems known to be fully case sensitive.

Co-authored-by: Jakob Borg <jakob@kastelo.net>
2020-07-28 11:15:11 +02:00
Simon Frei
a47546a1f1
lib/scanner, lib/model: Improve error handling when scanning (#6736) 2020-06-16 09:25:41 +02:00
Simon Frei
0b65a616ba
lib/scanner: Save one stat call per file (#6715) 2020-06-08 08:14:50 +02:00
Jakob Borg
dd92b2b8f4
all: Tweak error creation (#6391)
- In the few places where we wrap errors, use the new Go 1.13 "%w"
  construction instead of %s or %v.

- Where we create errors with constant strings, consistently use
  errors.New and not fmt.Errorf.

- Remove capitalization from errors in the few places where we had that.
2020-03-03 22:40:00 +01:00
Simon Frei
72194d137c lib/scanner: Don't scan if input path is below symlink (fixes #6090) (#6101) 2019-10-22 11:12:21 +02:00
Jakob Borg
24d4290d03 lib/model, lib/scanner: Pass a valid event logger (fixes #5970) (#5971) 2019-08-21 08:05:43 +02:00
Simon Frei
b1c74860e8
all: Remove global events.Default (ref #4085) (#5886) 2019-08-15 16:29:37 +02:00
Simon Frei
7a4c88d4e4 lib: Add mtime window when comparing files (#5852) 2019-07-23 21:48:53 +02:00
Aurélien Rainone
f1a7dd766e all: Add comment to ensure correct atomics alignment (fixes #5813)
Per the sync/atomic bug note:

> On ARM, x86-32, and 32-bit MIPS, it is the caller's
> responsibility to arrange for 64-bit alignment of 64-bit words
> accessed atomically. The first word in a variable or in an
> allocated struct, array, or slice can be relied upon to be
> 64-bit aligned.

All atomic accesses of 64-bit variables in syncthing code base are
currently ok (i.e they are all 64-bit aligned).

Generally, the bug is triggered because of incorrect alignement
of struct fields. Free variables (declared in a function) are
guaranteed to be 64-bit aligned by the Go compiler.

To ensure the code remains correct upon further addition/removal
of fields, which would change the currently correct alignment, I
added the following comment where required:

     // atomic, must remain 64-bit aligned

See https://golang.org/pkg/sync/atomic/#pkg-note-BUG.
2019-07-13 14:05:39 +01:00
Jakob Borg
997bb5e7e1 all: Remove "large blocks" config (#5763)
We now always use large / variable blocks.
2019-06-06 15:57:38 +01:00
Simon Frei
926e9228ed lib/scanner, lib/model: File -> item when logging error (#5664) 2019-04-21 16:19:59 +01:00
Simon Frei
0f80318ef6
lib/scanner: Consistenlty use CreateFileInfo and remove outdated comment (#5574) 2019-03-04 13:27:33 +01:00
Jakob Borg
c2ddc83509 all: Revert the underscore sillyness 2019-02-02 12:16:27 +01:00
Jakob Borg
0b2cabbc31
all: Even more boring linter fixes (#5501) 2019-02-02 11:45:17 +01:00
Simon Frei
99c9d65ddf lib/scanner: Check ignore patterns before reporting error (fixes #5397) (#5398) 2018-12-21 12:08:15 +01:00
Simon Frei
c40c9a8d6a
lib/scanner: Don't report error on missing items (fixes #5385) (#5387) 2018-12-17 14:52:15 +01:00
Simon Frei
c934918347 lib/scanner: Fix empty path on normalization error (fixes #5369) (#5370) 2018-12-12 12:09:39 +01:00
Simon Frei
2f9840ddae lib: Introduce fs.IsParent (fixes #5324) (#5326) 2018-11-22 11:16:45 +01:00
Simon Frei
d510e3cca3 all: Display errors while scanning in web UI (fixes #4480) (#5215) 2018-11-07 11:04:41 +01:00
Simon Frei
4f4781d254
lib/scanner: Centralise protocol.FileInfo creation (#5202) 2018-09-18 15:34:17 +02:00
Simon Frei
272fb3b444
all: Adjust windows perms in fs package (#5200) 2018-09-16 16:09:56 +02:00
Simon Frei
c8652222ef all: Check files on disk/in db when deleting/renaming (fixes #5194) (#5195) 2018-09-16 09:48:14 +02:00
Jakob Borg
f822b10550
all: Add receive only folder type (#5027)
Adds a receive only folder type that does not send changes, and where the user can optionally revert local changes. Also changes some of the icons to make the three folder types distinguishable.
2018-07-12 11:15:57 +03:00
Jakob Borg
b1b68ceedb
Add LocalFlags to FileInfo (#4952)
We have the invalid bit to indicate that a file isn't good. That's enough for remote devices. For ourselves, it would be good to know sometimes why the file isn't good - because it's an unsupported type, because it matches an ignore pattern, or because we detected the data is bad and we need to rescan it.

Or, and this is the main future reason for the PR, because it's a change detected on a receive only device. We will want something like the invalid flag for those changes, but marking them as invalid today means the scanner will rehash them. Hence something more fine grained is required.

This introduces a LocalFlags fields to the FileInfo where we can stash things that we care about locally. For example,

    FlagLocalUnsupported = 1 << 0 // The kind is unsupported, e.g. symlinks on Windows
    FlagLocalIgnored     = 1 << 1 // Matches local ignore patterns
    FlagLocalMustRescan  = 1 << 2 // Doesn't match content on disk, must be rechecked fully

The LocalFlags fields isn't sent over the wire; instead the Invalid attribute is calculated based on the flags at index sending time. It's on the FileInfo anyway because that's what we serialize to database etc.

The actual Invalid flag should after this just be considered when building the global state and figuring out availability for remote devices. It is not used for local file index entries.
2018-06-24 09:50:18 +02:00
Simon Frei
8ff7ceeddc lib/ignore, lib/scanner: Fix recursion to catch included paths (fixes #5009) (#5010) 2018-06-18 08:22:19 +02:00
Audrius Butkevicius
d60f0e734c lib/scanner: Copy execute bits from previous version on Windows (fixes #4969) (#4970) 2018-05-29 07:01:23 +01:00
Simon Frei
d59aecba31
lib/ignore, lib/scanner: Catch included items below ignored ones (#4811) 2018-05-14 09:47:23 +02:00
Audrius Butkevicius
ef0dcea6a4 lib/model: Verify request content against weak (and possibly strong) hash (#4767) 2018-05-05 10:24:44 +02:00
Jakob Borg
19c7cd99f5 all: Implement variable sized blocks (fixes #4807) 2018-04-16 19:08:50 +01:00
Simon Frei
69f2c26d50 lib/scanner, lib/model: Actually assign version when un-ignoring (fixes #4841) (#4842)
This fixes a mistake introduced in #4750 and #4776 and is relevant to v0.14.46-rc1
2018-03-27 16:24:20 -04:00
Audrius Butkevicius
8df90bb475 lib/scanner: Track modified by in symlinks (#4777) 2018-02-25 14:51:37 +01:00
Simon Frei
158859a1e2 lib: Handle metadata changes for send-only folders (fixes #4616, fixes #4627) (#4750)
Unignored files are marked as conflicting while scanning, which is then resolved
in the subsequent pull. Automatically reconciles needed items on send-only
folders, if they do not actually differ except for internal metadata.
2018-02-25 09:39:00 +01:00