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42 Commits

Author SHA1 Message Date
Nick Craig-Wood
f980f230c5 vfs: fix virtual entries causing deleted files to still appear 
Before this change, if a file was created on a remote but deleted
externally from that remote then there was potential for the delete to
never be noticed.

The sequence of events was:

- Create file on VFS - creates virtual directory entry
- File deleted externally to remote before the directory refreshed
- Now the file has a virtual add but is not in the listings so will never disappear

This patch fixes it by removing all virtual directory entries except
the following when the directory is re-read.

- On remotes which can't have empty directories: virtual directory
  adds are not flushed. These will remain virtual as long as the
  directory is empty.

- For virtual file add: files that are in the process of being
  uploaded are not flushed

This patch also adds the distinction between virtually added files and
directories.

It also refactors the virtual directory logic to make it easier to follow.

Fixes #4446
 2020-11-10 16:47:25 +00:00
Josh Soref
d0888edc0a Spelling fixes 
Fix spelling of: above, already, anonymous, associated,
authentication, bandwidth, because, between, blocks, calculate,
candidates, cautious, changelog, cleaner, clipboard, command,
completely, concurrently, considered, constructs, corrupt, current,
daemon, dependencies, deprecated, directory, dispatcher, download,
eligible, ellipsis, encrypter, endpoint, entrieslist, essentially,
existing writers, existing, expires, filesystem, flushing, frequently,
hierarchy, however, implementation, implements, inaccurate,
individually, insensitive, longer, maximum, metadata, modified,
multipart, namedirfirst, nextcloud, obscured, opened, optional,
owncloud, pacific, passphrase, password, permanently, persimmon,
positive, potato, protocol, quota, receiving, recommends, referring,
requires, revisited, satisfied, satisfies, satisfy, semver,
serialized, session, storage, strategies, stringlist, successful,
supported, surprise, temporarily, temporary, transactions, unneeded,
update, uploads, wrapped

Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
 2020-10-14 15:21:31 +01:00
Nick Craig-Wood
ddfde68140 vfs: fix directory locking caused by slow directory listings 
Before this fix we took the directory lock to read the ModTime of the
directory. This was causing locking on directories which were being
re-read from the backend.

This commit gives the modtime its own lock so it can be read even when
the directory is being updated.

See: https://forum.rclone.org/t/high-cpu-load-with-rclone-mount/17604
 2020-07-18 09:08:18 +01:00
Nick Craig-Wood
2adc057d95 vfs: fix very high load caused by slow directory listings 
In this commit (released in v1.52.0)

6ca7198f mount: fix disappearing cwd problem

SetSys was introduced to cache node lookups.

Unfortunately taking the vfs.(*Dir) lock in SetSys causes any FUSE
operations on a directory to pile up behind slow directory listings.

In some situations this leads to very high load.

This commit fixes it by using atomic operations to read and write the
Sys value make it independent of the lock.

See: https://forum.rclone.org/t/high-cpu-load-with-rclone-mount/17604
See: #4104
 2020-07-15 16:22:12 +01:00
Nick Craig-Wood
5db15cb157 vfs: make dir.ForgetAll and friends not forget virtual entries 
Before this change dir.ForgetAll and vfs/forget would forget about
virtual directory entries.

This change preserves them.
 2020-06-30 12:03:39 +01:00
Nick Craig-Wood
06a12f5e27 vfs: stop virtual directory entries dropping out of the directory cache 
Rclone adds virtual directory entries to the directory cache when it
creates a file or directory.

Before this change these dropped out of the directory cache when the
directory cache was reloaded. This meant that when the directory cache
expired:

- On bucket based backends, empty directories would disappear
- When using VFS writeback, files in the process of uploading would disappear

This is fixed by keeping track of the virtual entries in each
directory. The virtual entries are removed when they become real - ie
the object is read back from the listing.

This also keeps tracks of deletes in the same way so if a file is
deleted, it will not re-appear when the directory cache is reloaded if
the deletion hasn't finished yet.
 2020-06-30 12:03:39 +01:00
Nick Craig-Wood
cfcdc85b26 vfs: Add SetSys() methods to Node to allow caching stuff on a node 2020-05-04 11:38:07 +01:00
Nick Craig-Wood
eed9c5738d vfs: factor the vfs cache into its own package 2020-04-20 10:42:33 +01:00
Nick Craig-Wood
19db0df639 vfs: stop reading Dir members from outside dir.go 2020-04-19 15:16:43 +01:00
Nick Craig-Wood
268fcbb973 vfs: implement lock ordering between File and Dir to eliminate deadlocks 
As part of this we take a copy of the directory path as calling
d.Path() violates the total locking order.

See the comment at the top of file.go for details
 2020-04-19 15:16:43 +01:00
Nick Craig-Wood
3c91abce74 vfs: fix race condition caused by unlocked reading of Dir.path 2020-02-27 15:50:41 +00:00
Nick Craig-Wood
51efb349ac vfs: revise locking in file and dir to fix race conditions 2019-11-11 16:20:27 +00:00
Nick Craig-Wood
76f5e273d2 vfs: stop change notify polling clearing so much of the directory cache 
Before this change, change notify polls would clear the directory
cache recursively. So uploading a file to the root would clear the
entire directory cache.

After this change we just invalidate the directory cache of the parent
directory of the item and if the item was a directory we invalidate it
too.
 2019-10-21 20:51:11 +01:00
Nick Craig-Wood
1fe1a19339 vfs: stop empty dirs disappearing when renamed on bucket based remotes 
Before this change when we renamed a directory this cleared the
directory cache for the parent directory too.

If the directory was remaining in the same parent this wasn't
necessary and caused the empty directory to fall out of the cache.

Fixes #3597
 2019-10-14 14:38:30 +01:00
Ivan Andreev
1c4e33d4ad vfs: add flag --vfs-case-insensitive for windows/macOS mounts 
rclone mount when run on Windows & macOS will now default to `--vfs-case-insensitive`.
This means that
 2019-09-04 21:30:48 +01:00
Nick Craig-Wood
57d5de6fba build: fix up package paths after repo move 
git grep -l github.com/ncw/rclone | xargs -d'\n' perl -i~ -lpe 's|github.com/ncw/rclone|github.com/rclone/rclone|g'
goimports -w `find . -name \*.go`
 2019-07-28 18:47:38 +01:00
Nick Craig-Wood
bc70bff125 fs/dirtree: factor DirTree out of fs/walk and add tests 2019-07-02 15:26:55 +01:00
Aleksandar Jankovic
f78cd1e043 Add context propagation to rclone 
- Change rclone/fs interfaces to accept context.Context
- Update interface implementations to use context.Context
- Change top level usage to propagate context to lover level functions

Context propagation is needed for stopping transfers and passing other
request-scoped values.
 2019-06-19 11:59:46 +01:00
Nick Craig-Wood
1692c6bd0a vfs: shorten the locking window for vfs/refresh 
Before this change we locked the root directory, recursively fetched
the listing, applied it then unlocked the root directory.

After this change we recursively fetch the listing then apply it with
the root directory locked which shortens the time that the root
directory is locked greatly.

With the original method and the new method the subdirectories are
left unlocked and so potentially could be changed leading to
inconsistencies.  This change makes the potential for inconsistencies
slightly worse by leaving the root directory unlocked at a gain of a
much more responsive system while runing vfs/refresh.

See: https://forum.rclone.org/t/rclone-rc-vfs-refresh-locking-directory-being-refreshed/9004
 2019-03-05 14:17:42 +00:00
Nick Craig-Wood
173dfbd051 vfs: read directory and check for a file before mkdir 
Before this change when doing Mkdir the VFS layer could add the new
item to an unread directory which caused confusion.

It could also do mkdir on a file when run on a bucket based remote
which would temporarily overwrite the file with a directory.

Fixes #2993
 2019-02-28 14:05:17 +00:00
Nick Craig-Wood
53a8b5a275 vfs: Implement renaming of directories for backends without DirMove #2539 
Previously to this change, backends without the optional interface
DirMove could not rename directories.

This change uses the new operations.DirMove call to implement renaming
directories which will fall back to Move/Copy as necessary.
 2019-01-27 21:26:56 +00:00
Fabian Möller
1d14972e41 vfs: reduce directory cache cleared by poll-interval 
Reduce the number of nodes purged from the dir-cache when ForgetPath is
called. This is done by only forgetting the cache of the received path
and invalidating the parent folder cache by resetting *Dir.read.

The parent will read the listing on the next access and reuse the
dir-cache of entries in *Dir.items.
 2018-10-02 10:21:14 +01:00
Fabian Möller
2e80d4c18e vfs: update vfs/refresh rc command documentation 2018-08-07 09:31:12 +01:00
Fabian Möller
6349147af4 vfs: add non recursive mode to vfs/refresh rc command 2018-08-07 09:31:12 +01:00
Fabian Möller
782972088d vfs: add the vfs/refresh rc command 
vfs/refresh will walk the directory tree for the given paths and
freshen the directory cache. It will use the fast-list capability
of the remote when enabled.
 2018-08-07 09:31:12 +01:00
Stefan
67e9ef4547
mount: delay rename if file has open writers instead of failing outright - fixes #2130 (#2249) 2018-05-24 20:45:11 +02:00
Mateusz Pabian
7c5f87842c vfs: filter files . and .. from readDir output - fixes #2135 2018-04-25 16:09:07 +01:00
Remus Bunduc
70f07fd3ac
fs: add ChangeNotify and backend support for it (#2094) 
* fs: rename DirChangeNotify to ChangeNotify

* cache: switch to ChangeNotify

* ChangeNotify: keep order of notifications
 2018-03-08 22:03:34 +02:00
Nick Craig-Wood
5e334eedd2 vfs: re-use the File objects when re-reading the directory 
Make it so that d.items is never nil to simplify the code

This should help with inconsistent reads when the source object changes.
 2018-03-04 11:20:22 +00:00
Nick Craig-Wood
a80d8a21dc vfs: add flags parameter to Dir.Create 2018-01-19 13:18:40 +00:00
Nick Craig-Wood
11da2a6c9b Break the fs package up into smaller parts. 
The purpose of this is to make it easier to maintain and eventually to
allow the rclone backends to be re-used in other projects without
having to use the rclone configuration system.

The new code layout is documented in CONTRIBUTING.
 2018-01-15 17:51:14 +00:00
Nick Craig-Wood
b4083b4371 vfs: rename Fsync to Sync and implement Sync on Node and Handle 2017-11-20 12:46:23 +00:00
Nick Craig-Wood
c560017934 vfs: add Path method to Node and use it to stop reading nil DirEntry 
All DirEntry calls now have been checked for nil or converted to use Path.
 2017-11-20 12:46:22 +00:00
Nick Craig-Wood
7f20e1d7f3 vfs: add read write files and caching #711 
This adds new flags to mount, cmount, serve *

    --cache-max-age duration         Max age of objects in the cache. (default 1h0m0s)
    --cache-mode string              Cache mode off|minimal|writes|full (default "off")
    --cache-poll-interval duration   Interval to poll the cache for stale objects. (default 1m0s)
 2017-11-20 12:36:50 +00:00
Nick Craig-Wood
3fb1e96988 vfs: factor Open logic from Dir.Create into vfs.OpenFile 2017-11-20 12:00:32 +00:00
Nick Craig-Wood
e18122e88b vfs: add tests and subsequent fixes 
* Tests for VFS layer
  * Small fixes found during testing
  * Fix Close, Flush and Release behaviour for ReadFileHandle and WriteFileHandle
  * Fix nil object bugs on File
 2017-11-04 10:24:10 +00:00
Nick Craig-Wood
8184ec4b70 vfs: add EPERM to errors 2017-11-03 13:00:00 +00:00
Nick Craig-Wood
190367d917 vfs: factor duplicated Open code into vfs from mount/cmount 2017-11-03 13:00:00 +00:00
Nick Craig-Wood
3e0c91ba4b vfs: Move DefaultOpt to vfs and make some methods private 2017-11-03 13:00:00 +00:00
Nick Craig-Wood
7e065440fb vfs: rename Lookup to Stat to be more in keeping with os 2017-11-03 12:59:59 +00:00
Nick Craig-Wood
e8883e9fdb vfs: factor flags into vfsflags and remove global variables 2017-11-03 12:59:59 +00:00
Nick Craig-Wood
c1aaff220d Factor new vfs module out of cmd/mountlib 
This is an OS style file system abstraction with directory caching
used in mount, cmount, serve webdav and serve http.
 2017-11-03 12:59:59 +00:00