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43 Commits

Author SHA1 Message Date
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
Leo Luan c665201b85 vfs: support synchronous cache space recovery upon ENOSPC 
This patch provides the support of synchronous cache space recovery
to allow read threads to recover from ENOSPC errors when cache space
can be recovered from cache items that are not in use or safe to be
reset/emptied .

The patch complements the existing cache cleaning process in two ways.

Firstly, the existing cache cleaning process is time-driven that runs
periodically. The cache space can run out while the cache cleaner
thread is still waiting for its next scheduled run. The io threads
encountering ENOSPC return an internal error to the applications
in this case even when cache space can be recovered to avoid this
error. This patch addresses this problem by having the read threads
kick the cache cleaner thread in this condition to recover cache
space preventing unnecessary ENOSPC errors from being seen by the
applications.

Secondly, this patch enhances the cache cleaner to support cache
item reset. Currently the cache purge process removes cache
items that are not in use. This may not be sufficient when the
total size of the working set exceeds the cache directory's
capacity. Like in the current code, this patch starts the purge
process by removing cache files that are not in use. Cache items
whose access times are older than vfs-cache-max-age are removed first.
After that, other not-in-use items are removed in LRU order until
vfs-cache-max-size is reached. If the vfs-cache-max-size (the quota)
is still not reached at this time, this patch adds a cache reset
step to reset/empty cache files that are still in use but not
dirtied.  This enables application processes to continue without
seeing an error even when the working set depletes the cache space
as long as there is not a large write working set hoarding the
entire cache space.

By design this patch does not add ENOSPC error recovery for write
IOs. Rclone does not empty a write cache item until the file data
is written back to the backend upon close. Allowing more cache
space to be consumed by dirty cache items when the cache space is
already running low would increase the risk of exhausting the cache
space in a way that the vfs mount becomes unreadable.
 2020-08-25 21:12:06 +01:00
Nick Craig-Wood 7e4ba54608 vfs: allow ReadAt and WriteAt to run concurrently with themselves 
This should help with throughput on mounts and help when multiple
readers have the file open.

See: https://forum.rclone.org/t/concurrent-read-accesses-on-the-same-file-through-rclone-vfs-mount/17192
 2020-06-30 12:01:36 +01:00
Nick Craig-Wood e4e53a2e61 vfs: add --vfs-writeback option to delay writes back to cloud storage 
This is enabled by default and can be disabled with --vfs-writeback 0
 2020-06-30 12:01:36 +01:00
Nick Craig-Wood 917cb4acb3 vfs: implement partial reads in --vfs-cache-mode full 
This allows reads to only read part of the file and it keeps on disk a
cache of what parts of each file have been loaded.

File data itself is kept in sparse files.
 2020-06-30 12:01:36 +01:00
Nick Craig-Wood 88df5927f9 vfs: funnel all read/write calls through ReadAt/WriteAt 
This is in preparation for partial reads for read/write files
 2020-06-09 18:07:41 +01:00
Nick Craig-Wood 8c37262e05 vfs: don't use embedded methods for read/write handles for clarity 2020-06-09 18:07:23 +01:00
Nick Craig-Wood 05bc19c331 vfs: Remove uneeded locking from read write handle String() 2020-06-09 18:04:50 +01:00
Martin Michlmayr 4aee962233 doc: fix typos throughout docs and code 2020-05-20 15:54:51 +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 63128834da vfs: fix open file renaming on drive when using --vfs-cache-mode writes 
Before this change, when uploading files from the VFS cache which were
pending a rename, rclone would use the new path of the object when
specifiying the destination remote.  This didn't cause a problem with
most backends as the subsequent rename did nothing, however with the
drive backend, since it updates objects, the incorrect Remote was
embedded in the object.  This caused the rename to apparently succeed
but the object be at the wrong location.

The fix for this was to make sure we upload to the path stored in the
object if available.

This problem was spotted by the new rename tests for the VFS layer.
 2020-01-13 17:37:54 +00:00
Nick Craig-Wood 241921c786 vfs: don't cache the path in RW file objects to fix renaming 2019-12-12 13:31:10 +00:00
Brett Dutro 7d0d7e66ca vfs: move writeback of dirty data out of close() method into its own method (FlushWrites) and remove close() call from Flush() 
If a file handle is duplicated with dup() and the duplicate handle is
flushed, rclone will go ahead and close the file, making the original
file handle stale. This change removes the close() call from Flush() and
replaces it with FlushWrites() so that the file only gets closed when
Release() is called. The new FlushWrites method takes care of actually
writing the file back to the underlying storage.

Fixes #3381
 2019-10-09 10:07:29 +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
Aleksandar Jankovic 8243ff8bc8 accounting: isolate stats to groups 
Introduce stats groups that will isolate accounting for logically
different transferring operations. That way multiple accounting
operations can be done in parallel without interfering with each other
stats.

Using groups is optional. There is dedicated global stats that will be
used by default if no group is specified. This is operating mode for CLI
usage which is just fire and forget operation.

For running rclone as rc http server each request will create it's own
group. Also there is an option to specify your own group.
 2019-07-28 14:48:19 +01:00
Aleksandar Jankovic be0464f5f1 accounting: change stats interface 
This is done to make clear ownership over accounting object and prepare
for removing global stats object.

Stats elapsed time calculation has been altered to account for actual
transfer time instead of stats creation time.
 2019-07-28 14:48:19 +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 71e98ea584 vfs: fix renaming/deleting open files with cache mode "writes" under Windows 
Before this change, renaming and deleting of open files (which can
easily happen due to the asynchronous nature of file systems) would
produce an error, for example saving files with Firefox.

After this change we open files with the flags necessary for open
files to be renamed or deleted.

Fixes #2730
 2019-01-11 10:26:34 +00:00
Oleg Kovalov 06c9f76cd2 all: fix go-critic linter suggestions 2018-08-06 21:14:03 +01:00
Nick Craig-Wood cb5bd47e61 build: fix errors spotted by ineffassign linter 
These were mostly caused by shadowing err and a good fraction of them
will have caused errors not to be propagated properly.
 2018-05-05 17:32:41 +01:00
Nick Craig-Wood c19e675ca6 vfs: unify locking for RWFileHandle.openPending,.close and File.Delete #2141 
Without this fix the cached file can be removed as the file is being
uploaded or downloaded.  This can cause the directory listings to
become inconsistent (this issue) or data loss (if a retry was needed
in the Copy).

Remove file needs to be excluded from running at the same time as both
openPending and close so it makes sense to unify the locking between
all 3.
 2018-03-15 20:49:07 +00:00
Nick Craig-Wood 5795bd7db6 vfs: update cached copy if we know it has changed even if pending opens 
This fixes a problem with Caddy serving corrupted files out of the VFS
cache when the file on the remote changed.
 2018-03-04 11:20:22 +00:00
Nick Craig-Wood 9b011ce7e4 vfs: keep track of number of open RWHandles 2018-03-04 11:20:22 +00:00
Nick Craig-Wood 7fb53a031c vfs: don't cache the object in read and read/write handles 
This should help with inconsistent reads when the source object changes.
 2018-03-04 11:20:22 +00:00
Nick Craig-Wood b91bd32489 vfs: Fix TestWriteFileDoubleClose with --vfs-cache-mode >= writes 
This was causing the file to be closed on Flush() instead of Release()
when the file was opened with O_TRUNC.
 2018-02-26 21:26:32 +00:00
Nick Craig-Wood c3d0f68923 vfs: fix truncation work-around on Windows 
This no longer needs to deal with O_RDONLY and O_TRUNC since we
disallow this earlier.  This also fixes the code to just do it for
O_APPEND, not for everything.
 2018-02-26 19:46:38 +00:00
Nick Craig-Wood f57e92b9a5 vfs: fix creation of files when truncating #2083 
As spotted by @B4dM4n
 2018-02-26 19:37:58 +00:00
Nick Craig-Wood baf9ee5cf7 vfs: update cached copy if we know it has changed before using it 
Before this change we would have to wait for the --vfs-cache-max-age
to expire before getting an update.
 2018-02-26 18:00:51 +00:00
Nick Craig-Wood 354f1ad722 vfs: Use operations.Copy instead of CopyFile for efficiency 2018-02-26 17:54:18 +00:00
Nick Craig-Wood 9252224d82 vfs: don't open the file when using a RW handle for a null Seek 
Background: cmd/mount/file.go Open() function does a Seek(0, 1) to see
if the file handle is seekable to set a FUSE hint.  Before this change
the file was downloaded before it needed to be which was inefficient
(and broke beta.rclone.org because HEAD requests caused downloads!).
 2018-02-22 17:28:21 +00:00
Fabian Möller 62e72801be
vfs: fix race between multiple RWFileHandle (#2052) 
Fixes #2034
 2018-02-18 14:12:26 +01:00
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 29d34426bc vfs: fix deletion of in use directories #1860 
This was causing errors if the cache cleaner was called between the
Open and the pendingOpen of a RW file.

The fix was to move the cache open to the Open from the openPending.
 2017-12-15 15:42:49 +00:00
Nick Craig-Wood c16ac697a9 vfs: keep track of directories in the cache also #1860 
This makes managing empty directories more reliable.
 2017-11-28 20:39:23 +00:00
Nick Craig-Wood 0978957a2e vfs: make sure all 96 combinations of flags for Open work 2017-11-28 20:39:23 +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 321b6da7af vfs: don't remove file from writers until it is transferred 
This means that the list of active writers is up to date
 2017-11-20 12:46:23 +00:00
Nick Craig-Wood 1b22ee5b93 vfs: fix error handling in openPending so it returns the correct error 2017-11-20 12:46:23 +00:00
Nick Craig-Wood eab55ce882 vfs: add open files to directories 2017-11-20 12:46:23 +00:00
Nick Craig-Wood dec21ccf63 vfs, cmount: make truncate work properly in the presence or otherwise of open files 2017-11-20 12:46:22 +00:00
Nick Craig-Wood e7f2935333 vfs: decode flags in Open/OpenFile for debug 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