Commit graph

362 commits

Author SHA1 Message Date
albertony
7b8c974dec staticcheck: ineffective break statement 2022-07-04 11:24:59 +02:00
albertony
fdd2f8e6d2 Error strings should not be capitalized
Reported by staticcheck 2022.1.2 (v0.3.2)

See: staticcheck.io
2022-06-23 23:26:02 +02:00
Nick Craig-Wood
bc705e14d8 vfscache: fix fatal error: sync: unlock of unlocked mutex error
This message is a double panic and was actually caused by an assertion
panic in:

vfs/vfscache/downloaders/downloaders.go

This is triggered by the code added relatively recently to fix a bug
with renaming files:

ec72432cec vfs: fix failed to _ensure cache internal error: downloaders is nil error

So it appears that item.o may be nil at this point.

This patch detects item.o being nil and fetches it again with NewObject.

Fixes #6190 Fixes #6235
2022-06-21 14:28:53 +01:00
Nick Craig-Wood
4a382c09ec mount: run tests in a subprocess to fix deadlock - fixes #3259
Before this change we ran the tests and the mount in the same process.
This could cause deadlocks and often did, and made the mount tests
very unreliable.

This fixes the problem by running the mount in a seperate process and
commanding it via a pipe over stdin/stdout.
2022-06-16 16:48:09 +01:00
Nick Craig-Wood
626a416ff8 vfs: factor out the VFS option initialization for re-use #3259 2022-06-16 16:48:09 +01:00
albertony
ec117593f1 Fix lint issues reported by staticcheck
Used staticcheck 2022.1.2 (v0.3.2)

See: staticcheck.io
2022-06-13 21:13:50 +02:00
albertony
0e77072dcc vfs: error strings should not be capitalized 2022-05-16 12:43:43 +02:00
albertony
2437eb3cce vfs: fix incorrect detection of root in parent directory utility function
When using filepath.Dir, a difference to path.Dir is that it returns os PathSeparator
instead of slash when the path consists entirely of separators.

Also fixed casing of the function name, use OS in all caps instead of Os
as recommended here: https://github.com/golang/go/wiki/CodeReviewComments#initialisms
2022-05-16 12:43:43 +02:00
Nick Craig-Wood
5605e34f7b mount: fix --devname and fusermount: unknown option 'fsname' when mounting via rc
In this commit

f4c40bf79d mount: add --devname to set the device name sent to FUSE for mount display

The --devname parameter was added. However it was soon noticed that
attempting to mount via the rc gave this error:

    mount helper error: fusermount: unknown option 'fsname'
    mount FAILED: fusermount: exit status 1

This was because the DeviceName (and VolumeName) parameter was never
being initialised when the mount was called via the rc.

The fix for this was to refactor the rc interface so it called the
same Mount method as the command line mount which initialised the
DeviceName and VolumeName parameters properly.

This also fixes the cmd/mount tests which were breaking in the same
way but since they aren't normally run on the CI we didn't notice.

Fixes #6044
2022-04-25 12:17:25 +01:00
Nick Craig-Wood
06598531e0 vfs: remove wording which suggests VFS is only for mounting
See: https://forum.rclone.org/t/solved-rclone-serve-read-only/30377/2
2022-04-25 12:17:25 +01:00
Nick Craig-Wood
d4da9b98d6 vfs: add --vfs-fast-fingerprint for less accurate but faster fingerprints 2022-03-22 16:33:24 +00:00
Nick Craig-Wood
ec72432cec vfs: fix failed to _ensure cache internal error: downloaders is nil error
This error was caused by renaming an open file.

When the file was renamed in the cache, the downloaders were cleared,
however the downloaders were not re-opened when needed again, instead
this error was generated.

This fix re-opens the downloaders if they have been closed by renaming
the file.

Fixes #5984
2022-03-03 17:43:29 +00:00
Bumsu Hyeon
4b99e84242
vfs/cache: fix handling of special characters in file names (#5875) 2022-01-13 13:23:25 +01:00
Nick Craig-Wood
d252816706 vfs: add vfs/stats remote control to show statistics - fixes #5816 2021-11-23 18:00:21 +00:00
database64128
a7a8372976
🧪 fstest: fix time tests on Windows and add convenience methods to check local and remote fs with precision
Previously only the fs being checked on gets passed to
GetModifyWindow(). However, in most tests, the test files are
generated in the local fs and transferred to the remote fs. So the
local fs time precision has to be taken into account.

This meant that on Windows the time tests failed because the
local fs has a time precision of 100ns. Checking remote items uploaded
from local fs on Windows also requires a modify window of 100ns.
2021-11-09 11:43:36 +00:00
Nick Craig-Wood
e43b5ce5e5 Remove github.com/pkg/errors and replace with std library version
This is possible now that we no longer support go1.12 and brings
rclone into line with standard practices in the Go world.

This also removes errors.New and errors.Errorf from lib/errors and
prefers the stdlib errors package over lib/errors.
2021-11-07 11:53:30 +00:00
Atílio Antônio
c08d48a50d
docs: improve grammar and fix typos (#5361)
This alters some comments in source files, but is interested mainly in documentation files and help messages.
2021-11-04 12:50:43 +01:00
albertony
e2f47ecdeb docs: punctuation cleanup
See #5538
2021-10-20 22:56:19 +02:00
Nick Craig-Wood
72c013c6f4 vfs: increase time to wait for writers in tests to 30s
In some backends (eg putio) this deadline was consistently missed at
10s so this patch increases it to 30s.

See: #5734
2021-10-20 17:38:30 +01:00
Nick Craig-Wood
a98e3ea6f1 build: replace the deprecated golint linter with revive
This fixes up a small number of new lint items also
2021-10-15 12:51:31 +01:00
albertony
f3e71f129c config: convert --cache-dir value to an absolute path 2021-10-11 15:08:35 +02:00
albertony
fbc7f2e61b lib/file: improve error message when attempting to create dir on nonexistent drive on windows
This replaces built-in os.MkdirAll with a patched version that stops the recursion
when reaching the volume part of the path. The original version would continue recursion,
and for extended length paths end up with \\? as the top-level directory, and the error
message would then be something like:
mkdir \\?: The filename, directory name, or volume label syntax is incorrect.
2021-10-01 23:18:39 +02:00
Nick Craig-Wood
0902e5c48e vfs: Ignore ECLOSED in Setattr when truncating file handles
Before this change file handles could get closed while the truncate
the file handles loop was running.

This would mean that ocassionally an ECLOSED (which is translated into
EBADF by cmd/mount) would spuriously be returned if Release happened
to happen in the middle of a Truncate call (Setattr called with
size=0).

This change ignores the ECLOSED while truncating file handles.

See: https://forum.rclone.org/t/writes-to-wasabi-mount-failing-with-bad-file-descriptor-intermittently/26321
2021-09-28 11:51:41 +01:00
Ivan Andreev
24de896df2 build: apply gofmt from golang 1.17 2021-09-09 20:43:59 +03:00
albertony
3a2f748aeb vfs: ensure names used in cache path are legal on current os
Fixes #5360
2021-08-19 20:14:50 +02:00
albertony
18be4ad10d vfs: fix issue where empty dirs would build up in cache meta dir 2021-08-19 20:14:50 +02:00
albertony
63708d73be
docs/vfs: Merge duplicate chunked reading documentation from mount docs 2021-08-19 19:29:41 +02:00
Nick Craig-Wood
a5f277f47e vfs: fix crash when truncating a just uploaded object - Fixes #5522 2021-08-11 11:55:09 +01:00
Nick Craig-Wood
c86a55c798 vfs: fix duplicates on rename - fixes #5469
Before this change, if there was an existing file being uploaded when
a file was renamed on top of it, then both would be uploaded. This
causes a duplicate in Google Drive as both files get uploaded at the
same time. This was triggered reliably by LibreOffice saving doc
files.

This fix removes any duplicates in the upload queue on rename.
2021-07-30 19:31:02 +01:00
albertony
0574ebf44a vfs: do not print notice about missing poll-interval support when set to 0
Fixes #5359
2021-05-28 13:09:15 +02:00
albertony
22e86ce335
vfs: fix that umask option cannot be set as environment variable (#5351)
Fixes #5350
2021-05-22 20:48:02 +02:00
Nick Craig-Wood
16d1da2c1e vfs: remove item.metaDirty as it was confusing and not used
See discussion in #5277
2021-04-28 09:33:22 +01:00
Nick Craig-Wood
00a0ee1899 vfs: fix modtime changing when reading file into cache - fixes #5277
Before this change but after:

aea8776a43 vfs: fix modtimes not updating when writing via cache #4763

When a file was opened read-only the modtime was read from the cached
file. However this modtime wasn't correct leading to an incorrect
result.

This change fixes the definition of `item.IsDirty` to be true only
when the data is dirty. This fixes the problem as a read only file
isn't considered dirty.
2021-04-28 09:33:22 +01:00
albertony
2925e1384c Use binary prefixes for size and rate units
Includes adding support for additional size input suffix Mi and MiB, treated equivalent to M.
Extends binary suffix output with letter i, e.g. Ki and Mi.
Centralizes creation of bit/byte unit strings.
2021-04-27 02:25:52 +03:00
Leo Luan
8f23cae1c0 vfs: Add cache reset for --vfs-cache-max-size handling at cache poll interval
The vfs-cache-max-size parameter is probably confusing to many users.
The cache cleaner checks cache size periodically at the --vfs-cache-poll-interval
(default 60 seconds) interval and remove cache items in the following order.

(1) cache items that are not in use and with age > vfs-cache-max-age
(2) if the cache space used at this time still is larger than
vfs-cache-max-size, the cleaner continues to remove cache items that are
not in use.

The cache cleaning process does not remove cache items that are currently in use.
If the total space consumed by in-use cache items exceeds vfs-cache-max-size, the
periodical cache cleaner thread does not do anything further and leaves the in-use
cache items alone with a total space larger than vfs-cache-max-size.

A cache reset feature was introduced in 1.53 which resets in-use (but not dirty,
i.e., not being updated) cache items when additional cache data incurs an ENOSPC
error.  But this code was not activated in the periodical cache cleaning thread.

This patch adds the cache reset step in the cache cleaner thread during cache
poll to reset cache items until the total size of the remaining cache items is
below vfs-cache-max-size.
2021-04-26 17:55:52 +01:00
Nick Craig-Wood
2a40f00077 vfs: fix a code path which allows dirty data to be removed causing data loss
Before this change the VFS layer could remove a locally cached file
even if it had data which needed to be written back, thus causing data loss.

See: https://forum.rclone.org/t/rclone-1-55-doesnt-save-file-changes-if-the-file-has-been-reopened-during-upload-google-drive-mount/23646
2021-04-20 16:36:38 +01:00
Nick Craig-Wood
20e15e52a9 vfs: fix Create causing windows explorer to truncate files on CTRL-C CTRL-V
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
2021-03-31 14:48:02 +01:00
Nick Craig-Wood
b47d6001a9 vfs: fix directory renaming by renaming dirs cached in memory
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
2021-03-22 09:07:01 +00:00
Nick Craig-Wood
a4c4ddf052 vfs: rename files in cache and cancel uploads on directory rename
Before this change rclone did not cancel an uploads or rename the
cached files in the directory cache when a directory was renamed.

This caused issues with uploads arriving in the wrong place on bucket
based file systems.

See: https://forum.rclone.org/t/after-a-directory-renmane-using-mv-files-are-not-visible-any-longer/22797
2021-03-22 09:07:01 +00:00
Nick Craig-Wood
c72d2c67ed vfs: add debug dump function to dump the state of the VFS cache 2021-03-22 09:06:44 +00:00
Nick Craig-Wood
5e95877840 vfs: fix modtime set if --vfs-cache-mode writes/full and no write
When using --vfs-cache-mode writes or full if a file was opened for
write intent, the modtime was set and the file was closed without
being modified the modtime would never be written back to storage.

The sequence of events

- app opens file with write intent
- app does set modtime
- rclone sets the modtime on the cache file, but not the remote file
  because it is open for write and can't be set yet
- app closes the file without changing it
- rclone doesn't upload the file because the file wasn't changed so
  the modtime doesn't get updated

This fixes the problem by making sure any unapplied modtime changes
are applied even if the file is not modified when being closed.

Fixes #4795
2021-03-16 13:36:48 +00:00
Nick Craig-Wood
8b491f7f3d vfs: fix modtimes changing by fractional seconds after upload #4763
Before this change, rclone would return the modification times of the
cache file or the pending modtime which would be more accurate than
the modtime that the backend was capable of.

This meant that the modtime would be change slightly when the item was
actually uploaded.

For example modification times on Google Drive would be rounded to the
nearest millisecond.

This fixes the VFS layer to always return modtimes directly from an
object stored on the remote, or rounded to the precision that the
remote is capable of.
2021-03-16 13:31:47 +00:00
Nick Craig-Wood
aea8776a43 vfs: fix modtimes not updating when writing via cache - fixes #4763
This reads modtime from a dirty cache item if it exists. This mirrors
the way reading the size works.

This fixes the mod time not updating when the file is written, only
when the writeback completes.

See: https://forum.rclone.org/t/rclone-mount-and-changing-timestamps-after-writes/22629
2021-03-16 13:31:47 +00:00
Nick Craig-Wood
c387eb8c09 vfs: don't set modification time if it was already correct
Before this change, rclone would set the modification time of an
object after it had been uploaded. However with --vfs-cache-mode
writes and above, the modification time of the object is already
correct as the cache backing file gets set with the correct
modification time before upload.

Setting the modification time causes another version to be created on
backends such as S3 so it should be avoided if possible.

This change checks to see if the modification time needs changing and
only sets it if necessary.

See: https://forum.rclone.org/t/produce-2-versions-when-overwrite-an-object-in-min-io/19634
2021-03-16 13:31:47 +00:00
Nick Craig-Wood
687a3b1832 vfs: fix data race discovered by the race detector
This fixes a place where we read from item.o without the item.mu held.
2021-03-15 19:22:07 +00:00
tYYGH
c0cf54067a
vfs: --vfs-used-is-size to report used space using recursive scan (#4043)
Some backends, most notably S3, do not report the amount of bytes used.
This patch introduces a new flag that allows instead of relying on the
backend, use recursive scan similar to `rclone size` to compute the total
used space. However, this is ineffective and should be used as a last resort.

Co-authored-by: Yves G <theYinYeti@yalis.fr>
2021-02-17 23:36:13 +03:00
Nick Craig-Wood
9d37c208b7 vfs: document simultaneous usage with the same cache shouldn't be used
Fixes #2227
2021-02-16 17:15:05 +00:00
Nick Craig-Wood
ae3963e4b4 fs: Add string alternatives for setting options over the rc
Before this change options were read and set in native format. This
means for example nanoseconds for durations or an integer for
enumerated types, which isn't very convenient for humans.

This change enables these types to be set with a string with the
syntax as used in the command line instead, so `"10s"` rather than
`10000000000` or `"DEBUG"` rather than `8` for log level.
2021-02-07 14:56:41 +00:00
albertony
459cc70a50 vfs: fix invalid cache path on windows when using :backend: as remote
The initial ':' is included in the ad-hoc remote name, but is illegal character
in Windows path. Replacing it with '^', which is legal in filesystems but illegal
in regular remote names, so name conflict is avoided.

Fixes #4544
2021-01-30 16:18:15 +00:00
Martin Michlmayr
cd075f1703 docs: fix markup of arguments #4276
Command line arguments have to be marked as code.
2021-01-25 22:40:46 +03:00
Nick Craig-Wood
b80d498304 vfs: fix file leaks with --vfs-cache-mode full and --buffer-size 0
Before this change using --vfs-cache-mode full and --buffer-size 0
together caused the vfs downloader to open more and more downloaders.

This is fixed by introducing a minimum size of 1M for the window to
look for an existing downloader.

Fixes #4892
2021-01-21 18:35:04 +00:00
albertony
9db51117dc vfs: docs: add note on os specific option 2020-12-28 13:59:34 +00:00
albertony
a9c9467210 vfs: docs: add note about use of --transfers in section about performance 2020-12-28 13:59:34 +00:00
albertony
e92cb9e8f8 mount: more user friendly mounting as network drive on windows
Add --network-mode option to activate mounting as network drive without having to set volume prefix.
Add support for automatic drive letter assignment (not specific to network drive mounting).
Allow full network share unc path in --volname, which will also implicitely activate network drive mounting.
Allow full network share unc path as mountpoint, which will also implicitely activate network drive mounting, and the specified path will be used as volume prefix and the remote will be mounted on an automatically assigned drive letter instead.
2020-12-28 13:59:34 +00:00
Nick Craig-Wood
4f8ee736b1 vfs: make cache dir absolute before using it to fix path too long errors
If --cache-dir is passed in as a relative path, then rclone will not
be able to turn it into a UNC path under Windows, which means that
file names longer than 260 chars will fail when stored in the cache.

This patch makes the --cache-dir path absolute before using it.

See: https://forum.rclone.org/t/handling-of-long-paths-on-windows-260-characters/20913
2020-12-11 10:00:51 +00:00
Nick Craig-Wood
2e21c58e6a fs: deglobalise the config #4685
This is done by making fs.Config private and attaching it to the
context instead.

The Config should be obtained with fs.GetConfig and fs.AddConfig
should be used to get a new mutable config that can be changed.
2020-11-26 16:40:12 +00:00
Nick Craig-Wood
2347762b0d vfs: fix "file already exists" error for stale cache files
Before this change if a file was uploaded through a mount, then
deleted externally, trying to upload that file again could give EEXIST
"file already exists".

This was because the file already existing in the cache was confusing
rclone into thinking it already had the file.

The fix is to check that if rclone has a stale cache file then to
ignore it in this situation.

See: https://forum.rclone.org/t/rclone-cant-reuse-filenames/20400
2020-11-13 10:32:21 +00:00
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
Nick Craig-Wood
1fb6ad700f accounting: add context.Context #3257 #4685 2020-11-09 18:05:54 +00:00
Nick Craig-Wood
d69b96a94c test: Add context to mockfs.NewFs #3257 #4685 2020-11-09 18:05:54 +00:00
Nick Craig-Wood
d846210978 fs: Add context to NewFs #3257 #4685
This adds a context.Context parameter to NewFs and related calls.

This is necessary as part of reading config from the context -
backends need to be able to read the global config.
2020-11-09 18:05:54 +00:00
Nick Craig-Wood
43e0929339 vfs: fix vfs/refresh calls with fs= parameter
Before this change rclone gave an error when the fs parameter was
provided.

This change removes the fs parameter from the parameters once it has
been read which avoids the error.

See: https://forum.rclone.org/t/precaching-with-vfs-refresh-fails-with-an-error-when-having-multiple-cloud-drives/20267
2020-11-07 14:26:33 +00:00
Josh Soref
3e1cb8302a docs: spelling: etc.
Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
2020-10-28 18:16:23 +00:00
Josh Soref
e4a87f772f docs: spelling: e.g.
Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
2020-10-28 18:16:23 +00:00
Josh Soref
bbe7eb35f1 docs: spelling: server-side
Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
2020-10-28 18:16:23 +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
a86cedbc24 vfs: Fix --no-modtime to not attempt to set modtimes (as documented)
See: https://forum.rclone.org/t/rclone-mount-with-azure-blob-archive-tier/19414
2020-10-09 17:01:16 +01:00
Leo Luan
c5c56cda02 vfs: Add a missed update of used cache space
The missed update can cause incorrect before-cleaning cache stats
and a pre-mature condition broadcast in purgeOld before the cache
space use is reduced below the quota.
2020-10-06 16:35:23 +01:00
Leo Luan
2295123cad vfs: Add exponential backoff during ENOSPC retries
Add an exponentially increasing delay during retries up ENOSPC error
to avoid exhausting the 10 retries too soon when the cache space
recovery from item resets is not available from the file system yet
or consumed by other large cache writes.
2020-10-06 16:35:23 +01:00
Leo Luan
ff0280c0cb vfs: Fix missed concurrency control between some item operations and reset
Item reset is invoked by cache cleaner for synchronous recovery
from ENOSPC errors. The reset operation removes the cache file and
closes/reopens the downloaders.  Although most parts of reset and
other item operations are done with the item mutex held, the mutex
is released during fd.WriteAt and downloaders calls. We used preAccess
and postAccess calls to serialize Reset, ReadAt, and Open, but missed
some other item operations. The patch adds preAccess/postAccess
calls in Sync, Truncate, Close, WriteAt, and rename.
2020-10-06 16:35:23 +01:00
Leo Luan
64d736a57b vfs: Fix a race condition in retryFailedResets
A failed item reset is saved in the errItems for retryFailedResets
to process.  If the item gets closed before the retry, the item may
have been removed from the c.item array. Previous code did not
account for this condition. This patch adds the check for the
exitence of the retry items in retryFailedResets.
2020-10-06 16:35:23 +01:00
Leo Luan
5f1d5a1897 vfs: Fix a deadlock vulnerability in downloaders.Close
The downloaders.Close() call acquires the downloaders' mutex before
calling the wait group wait and the main downloaders thread has a
periodical (5 seconds interval) call to kick its waiters and the
waiter dispatch function tries to get the mutex. So a deadlock can
occur if the Close() call starts, gets the mutex, while the main
downloader thread already got the timer's tick and proceeded to
call kickWaiters. The deadlock happens when the Close call gets
the mutex between the timer's kick and the main downloader thread
gets the mutex first. So it's a pretty short period of time and
it probably explains why the problem has not surfaced, maybe
something like tens of nanoseconds out of 5 seconds (~10^^-8).
It took 5 days of continued stressing the Close calls for the
deadlock to appear.
2020-10-06 16:35:23 +01:00
Hekmon
66def93373 mount cmd: update systemd status with cache stats 2020-10-06 16:21:30 +01:00
Nick Craig-Wood
18ccf0f871 vfs: detect and recover from a file being removed externally from the cache
Before this change if a file was removed from the cache while rclone
is running then rclone would not notice and proceed to re-create it
full of zeros.

This change notices files that we expect to have data in going missing
and if they do logs an ERROR recovers.

It isn't recommended deleting files from the cache manually with
rclone running!

See: https://forum.rclone.org/t/corrupted-data-streaming-after-vfs-meta-files-removed/18997
Fixes #4602
2020-09-18 10:30:02 +01:00
Nick Craig-Wood
6a56ac1032 vfs,local: Log an ERROR if we fail to set the file to be sparse
See: https://forum.rclone.org/t/rclone-1-53-release/18880/73
2020-09-11 15:36:47 +01:00
Nick Craig-Wood
27b9ae4fc3 vfs: fix spurious error "vfs cache: failed to _ensure cache EOF"
Before this change the error message was produced for every file which
was confusing users.

After this change we check for EOF and return from ReadAt at that
point.

See: https://forum.rclone.org/t/rclone-1-53-release/18880/10
2020-09-03 10:25:00 +01:00
Nick Craig-Wood
3305079a03 vfs: fix typos in help 2020-09-02 14:24:44 +01:00
Sam Edwards
23b2c58018 vfs: Quiet removeNotInUse logging to debug when not removing 2020-09-02 11:55:20 +01:00
Nick Craig-Wood
70c8566cb8 fs: Pin created backends until parents are finalized
This attempts to solve the backend lifecycle problem by

- Pinning backends mentioned on the command line into the cache
  indefinitely

- Unpinning backends when the containing structure (VFS, wrapping
  backend) is destroyed

See: https://forum.rclone.org/t/rclone-rc-backend-command-not-working-as-expected/18834
2020-09-01 18:21:03 +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
94a0991584 vfs: set the modtime of the cache file immediately
Before this change we set the modtime of the cache file when all
writers had finished.

This has the unfortunate effect that the file is uploaded with the
wrong modtime which means on backends which can't set modtimes except
when uploading files it is wrong.

This change sets the modtime of the cache file immediately in the
cache and in turn sets the modtime in the file info.
2020-08-20 16:24:04 +01:00
Nick Craig-Wood
d2ad293fae vfs: fix rename tests by waiting for writes to complete
Before this change the background writing of the file was racing with
the test of the object on the remote.

This meant that the tests passed locally but failed on a lot of the
remotes.
2020-08-19 17:04:17 +01:00
Nick Craig-Wood
6082096f7e vfs: check file exists in cache before renaming/setmodtime/deleting
Before this change we didn't check the file exists before renaming it,
setting its modification time or deleting it. If the file isn't in the
cache we don't need to do the action since it has been done on the
actual object, so these errors were producing unecessary log messages.

This change checks to see if the file exists first before doing those
actions.
2020-08-19 17:01:59 +01:00
Nick Craig-Wood
9a6fcd035b vfs: file: fix some locking issues reading f.d without the lock
Before this change we were reading Files.d without the lock. This
isn't allowed as d can change when the file is renamed.
2020-08-19 17:01:33 +01:00
Nick Craig-Wood
47d08ac1f1 vfs: recommend --vfs-cache-modes writes on backends which can't stream 2020-08-18 17:33:27 +01:00
Nick Craig-Wood
4d7f91309b vfs: fix download threads timing out
Before this fix, download threads would fill up the buffer and then
timeout even though data was still being read from them. If the client
was streaming slower than network speed this caused the downloader to
stop and be restarted continuously. This caused more potential for
skips in the download and unecessary network transactions.

This patch fixes that behaviour - as long as a downloader is being
read from more often than once every 5 seconds, it won't timeout.

This was done by:

- kicking the downloader whenever ensureDownloader is called
- making the downloader loop if it has already downloaded past the maxOffset
- making setRange() always kick the downloader
2020-08-06 17:26:18 +01:00
Nick Craig-Wood
109b695621 vfs: add --vfs-read-ahead parameter for use with --vfs-cache-mode full
This parameter causes extra read-ahead over --buffer-size which is not
buffered in memory but on disk.
2020-08-06 17:26:18 +01:00
Nick Craig-Wood
4441e012cf vfs: fix saving from chrome without --vfs-cache-mode writes #4293
Due to Chrome's rather complicated use of file handles when saving
files from the download windows, rclone was attempting to truncate a
closed file.

The file appeared closed due to the handling of 0 length files.

This patch removes the check for the file being closed in the
WriteFileHandle.Truncate call. This is safe because the only action
this method takes is to emit an error message if the file is the wrong
size.

See: https://forum.rclone.org/t/google-drive-cannot-save-files-directly-from-browser-to-gdrive-mounted-path/17992/
2020-07-28 17:18:31 +01:00
Nick Craig-Wood
421585dd72 accounting: add context to Account and propagate changes #3257
This is preparation for getting the Accounting to check the context,
buf first we need to get it in place. Since this is one of those
changes that makes lots of noise, this is in a seperate commit.
2020-07-28 16:41:17 +01:00
Nick Craig-Wood
0272a7f405 mount: change interface of mount commands to take mount options
This is in preparation of being able to pass mount options to the rc
command "mount/mount"
2020-07-24 10:48:51 +01:00
Nick Craig-Wood
2871268505 mount: change interface of mount commands to take VFS
This is in preparation of being able to pass options to the rc command
"mount/mount"
2020-07-23 12:30:41 +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
126efaadcc vfs: fix renamed files not being uploaded with --vfs-cache-mode minimal
Before this change files that were in the cache and renamed with
--vfs-cache-mode minimal weren't renamed at all.

This fixes the problem and adds tests for all the different
combinations of cache modes and in and out of the cache.
2020-07-15 16:22:12 +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
b2f4f52b64 vfs cache: make logging consistent and remove some debug logging 2020-07-06 17:32:53 +01:00
Nick Craig-Wood
c65ed26a7e vfs: vfscache: Fix renaming of items while they are being uploaded
Previous to the fix, if an item was being uploaded and it was renamed,
the upload would fail with missing checksum errors.

This change cancels any uploads in progress if the file is renamed.
2020-07-06 17:32:53 +01:00
Nick Craig-Wood
df5dbaf49b vfs: writeback: add Rename call for renaming items in the writeback queue 2020-07-06 17:32:53 +01:00
Nick Craig-Wood
63ebe4ca8d vfs: Reduce logging of metadata expiry to debug 2020-07-02 14:52:12 +01:00
Nick Craig-Wood
96c2fdb445 vfs: update VFS help 2020-06-30 12:03:39 +01:00
Nick Craig-Wood
8301a72453 vfs: Fix over downloading with --vfs-cache-mode full and --buffer-size 0
This was caused by the signal to stop buffering being ignored when
there was no buffer!

This is fixed by explicitly checking for no buffering and stopping.
2020-06-30 12:03:39 +01:00