Before this fix, doing CTRL-C and CTRL-V on a file in Windows explorer
caused the **source** and the the destination to be truncated to 0.
This is because Windows opens the source file with Create with flags
`O_RDWR|O_CREATE|O_EXCL` but doesn't write to it - it only reads from
it. Rclone was taking the call to Create as a signal to always make a
new file, but this is incorrect.
This fix reads an existing file from the directory if it exists when
Create is called rather than always creating a new one. This fixes the
problem.
Fixes#5181
Before this change, if a directory was renamed and it or any children
had virtual entries in it they weren't flushed.
The consequence of this was that the directory path got out sync with
the actual position of the directory in the tree, leading to listings
of the old directory rather than the new one.
The fix renames any directories remaining after the ForgetAll to have
the correct path which fixes the problem.
See: https://forum.rclone.org/t/after-a-directory-renmane-using-mv-files-are-not-visible-any-longer/22797
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
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
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
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.
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
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.
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
- 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.
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
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
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.
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.
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.
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.
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)
* 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
