with the fix for #2909 (improving handling missing chunks), we
changed from bailing to warning during a garbage collection when
updating the atime of a chunk.
but, updating the atime can not only fail when the chunk is missing,
but also on other occasions, e.g. no permissions or more importantly,
no space left on the device. in that case, the atime of a valid and used
chunk cannot be updated, and the second sweep of the gc will remove that chunk.
[0] is a real world example of that happening.
instead, only warn on really missin chunks, and bail on all other
errors.
0: https://forum.proxmox.com/threads/pbs-server-full-two-days-later-almost-empty.83274/
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
all the verify methods pass along the following:
- task worker
- datastore
- corrupt and verified chunks
might as well pull that out into a common type, with the added bonus of
now having a single point for construction instead of copying the
default capacaties in three different modules..
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
the error message don't make sense with an empty default
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
chunk_stream one can be collapsed, since split == split_to with at set
to buffer.len() anyway.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
instead of just logging the error. this should never happen in practice
unless someone is messing with the keyfile, in which case, it's better
to abort.
update tests accordingly (wrong fingerprint should fail, no fingerprint
should get the expected one).
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
the RSA key and the encryption key itself are hard-coded to avoid
stalling the test runs because of lack of entropy, they have no special
significance otherwise.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
this fixes the issue that on some filesystems, you cannot recursively
remove a directory when you hold a lock on a file inside (e.g. nfs/cifs)
it is not really backwards compatible (so during an upgrade, there
could be two daemons have the lock), but since the locking was
broken before (see previous patch) it should not really matter
(also it seems very unlikely that someone will trigger this)
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
'lock_manifest' returns a Result<File, Error> so we always got the result,
even when we did not get the lock, but we acted like we had.
bubble the locking error up
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
percentage of verified groups, interpolating based on snapshot count
within the group. in most cases, this will also be closer to 'real'
progress since added snapshots (those which will be verified) in active
backup groups will be roughly evenly distributed, while number of total
snapshots per group will be heavily skewed towards those groups which
have existed the longest, even though most of those old snapshots will
only be re-verified very infrequently.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
BackupInfo::list_backup_groups is identical code-wise, and makes more
sense as entry point for listing groups.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
WalkDir does not follow symlinks by default anyway, and this behaviour
is not documented anywhere. e.g., if a sysadmin mounts 'extra storage'
for some backup group or type (not knowing that only metadata is stored
in those directories), GC will ignore all the indices contained within
and happily garbage collect their chunks..
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
for safety reason, GC finds and marks all index files below the
datastore base path. as a result of regular operations, only index files
within the expected scheme of <TYPE>/<ID>/<TIMESTAMP> should exist.
add a small check + warning if the index list contains index files out
side of this expected scheme, so that an admin with shell access can
investigate.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
we have messages starting the phases anyway, and limit the number of
progress updates so that context remains available at all times.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
otherwise loading will run into the signature mismatch which is
technically true, but not the complete picture in this case.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
if the manifest is signed/the contained archives/blobs are encrypted.
stored in 'unprotected' area, since there is already a strong binding
between key and manifest via the signature, and this avoids breaking
backwards compatibility for a simple usability improvement.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
and set/generate it on
- key creation
- key passphrase change
- key decryption if not already set
- key encryption with master key
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Simplify the phase 2 code by treating .bad files just like regular
chunks, with the exception of stat logging.
To facilitate, we need to touch .bad files in phase 1. We only do this
under the condition that 1) the original chunk is missing (as before),
and 2) the original chunk is still referenced somewhere (since the code
lives in the error handler for a failed chunk touch, it only gets called
for chunks we expect to be there, i.e. ones that are referenced).
Untouched they will then be cleaned up after 24 hours (or after the last
longer-running task finishes).
Reason 2) is also a fix for .bad files not being cleaned up at all if
the original is no longer referenced anywhere (e.g. a user deleting all
snapshots after seeing some corrupt chunks appear).
cond_touch_path is introduced to touch arbitrary paths in the chunk
store with the same logic as touching chunks.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
by listing groups first, then filtering, then listing group snapshots.
this cuts down the number of openat/getdirents calls for users that just
have a partial view of the datastore.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
log invalid owners to system log, and continue with next group just as
if permission checks fail for the following operations:
- verify store with limited permissions
- list store groups
- list store snapshots
all other call sites either handle it correctly already (sync/pull), or
operate on a single group/snapshot and can bubble up the error.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
in the api we use PROXMOX_SAFE_ID_REGEX for backup ids, but here
(where we use it to list them) we use a local regex
since the first is a superset of the one used here, simply extend
the local one
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
index files that were smaller than their respective header size,
would fail with
"failed to fill whole buffer"
instead now check explicitely for the size and fail with
"index too small (size)"
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
try do reduce some unecessary lines, make match arms more precise so
one can faster see what's actually happening.
Also, avoid
> return Err(format_err!(...))
stuff, just use bail!()
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
for verifying a whole datastore. Datastore.Backup now allows verifying
only backups owned by the triggering user.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
in most generic places. this is accompanied by a change in
RpcEnvironment to purposefully break existing call sites.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Make it more clear that removed files are chunks (not indexes or
something like that, user cannot know that we do not touch them here)
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
fixes commit b4fb262335, which copied
over the "Removed bad files:" block, but only adapted the log text,
not the actual variable.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
saves files mtime as i64 instead of u64 which enables backup of
files with negative mtime
the catalog_decode_i64 is compatible to encoded u64 values (if < 2^63)
but not reverse, so all "old" catalogs can be read with the new
decoder, but catalogs that contain negative mtimes will decode wrongly
on older clients
also remove the arbitrary maximum value of 2^63 - 1 for
encode_u64 (we just use up to 10 bytes now) and correctly
decode them and update the comments accordingly
adds also test for i64 encode/decode and for compatibility between
u64 encode and i64 decode
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
commit a4915dfc2b made a wrong fix, as
it did not observed that the last expressions was done under the
invariant that we had a last verification result, because if none
could be loaded we already returned true (include).
It thus broke the case for "never re-verify", which is important when
using multiple schedules, a more high frequent one for new,
unverified snapshots, and a low frequency to re-verify older snapshots,
e.g., monthly.
Fix this case again, rework the code to avoid this easy to oversee
invariant. Use a nested match to better express the implication of
each setting, and add some comments.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
and load it again when opening it
this way we can persist the status of the last garbage collect across
daemon reloads and reboots
Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>
To cater to the paranoid, a new datastore-wide setting "verify-new" is
introduced. When set, a verify job will be spawned right after a new
backup is added to the store (only verifying the added snapshot).
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Force consumers to use the lookup_datastore method instead of
potentially opening a datastore twice, and pass the config we have
already loaded into open_with_path, removing the need for open(1).
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Avoid races when updating manifest data by flocking a lock file.
update_manifest is used to ensure updates always happen with the lock
held.
Snapshot deletion also acquires the lock, so it cannot interfere with an
outstanding manifest write.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Removing a snapshot has some more safety checks which we don't want to
ignore when removing an entire group (i.e. locking the manifest and
notifying GC).
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
There's no point in having that as a seperate method, just parse the
thing into a struct and write it back out correctly.
Also makes further changes to the method simpler.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
If we can't acquire a lock (either because the snapshot disappeared, it
is about to be forgotten/pruned, or it is currently still running) skip
the snapshot. Hold the lock during verification, so that it cannot be
deleted while we are still verifying.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
...to avoid it being forgotten or pruned while in use.
Update lock error message for deletions to be consistent.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
To untangle the server code from the actual backup
implementation.
It would be ideal if the whole backup/ dir could become its
own crate with minimal dependencies, certainly without
depending on the actual api server. That would then also be
used more easily to create forensic tools for all the data
file types we have in the backup repositories.
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This is only acquired in those two methods, both as shared. So it has
no use.
It seems, that it was planned in the past that the index deletion
should take the exclusive, while read and write takes the shared
flock on the index, as one can guess from the lock comments in commit
0465218953
But then later, in commit c8ec450e37)
the documented semantics where changed to use a temp file and do an
atomic rename instead for atomicity.
The reader shared flock on the index file was done inbetween,
probably as preparatory step, but was not removed again when strategy
was changed to using the file rename instead.
Do so now, to avoid confusion of readers and a useless flock.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
In theory, one can do std::mem::forget, and ignore the drop handler. With
the lifetime hack, this could result in a crash.
So we simply require 'static lifetime now (futures also needs that).
- remove chrono dependency
- depend on proxmox 0.3.8
- remove epoch_now, epoch_now_u64 and epoch_now_f64
- remove tm_editor (moved to proxmox crate)
- use new helpers from proxmox 0.3.8
* epoch_i64 and epoch_f64
* parse_rfc3339
* epoch_to_rfc3339_utc
* strftime_local
- BackupDir changes:
* store epoch and rfc3339 string instead of DateTime
* backup_time_to_string now return a Result
* remove unnecessary TryFrom<(BackupGroup, i64)> for BackupDir
- DynamicIndexHeader: change ctime to i64
- FixedIndexHeader: change ctime to i64
since converting from i64 epoch timestamp to DateTime is not always
possible. previously, passing invalid backup-time from client to server
(or vice-versa) panicked the corresponding tokio task. now we get proper
error messages including the invalid timestamp.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
by either printing the original, out-of-range timestamp as-is, or
bailing with a proper error message instead of panicking.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
even if it can't be handled by chrono. silently replacing it with epoch
0 is confusing..
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
We need to update the atime of chunk files if they already exist,
otherwise a concurrently running GC could sweep them away.
This is protected with ChunkStore.mutex, so the fstat/unlink does not
race with touching.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
The iterator of get_chunk_iterator is extended with a third parameter
indicating whether the current file is a chunk (false) or a .bad file
(true).
Count their sizes to the total of removed bytes, since it also frees
disk space.
.bad files are only deleted if the corresponding chunk exists, i.e. has
been rewritten. Otherwise we might delete data only marked bad because
of transient errors.
While at it, also clean up and use nix::unistd::unlinkat instead of
unsafe libc calls.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
This ensures that following backups will always upload the chunk,
thereby replacing it with a correct version again.
Format for renaming is <digest>.<counter>.bad where <counter> is used if
a chunk is found to be bad again before a GC cleans it up.
Care has been taken to deliberately only rename a chunk in conditions
where it is guaranteed to be an error in the chunk itself. Otherwise a
broken index file could lead to an unwanted mass-rename of chunks.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Save the state ("ok" or "failed") and the UPID of the respective
verify task. With this we can easily allow to open the relevant task
log and show when the last verify happened.
As we already load the manifest when listing the snapshots, just add
it there directly.
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
to avoid `map_struct` which is actually unsafe because it
does not verify alignment constraints at all
Signed-off-by: Wolfgang Bumiller <w.bumiller@proxmox.com>
This reverts commit d53fbe2474.
The HashSet and "register" function are unnecessary, as we already know
which backup is the one we need to check: the last one, stored as
'last_backup'.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
An flock on the snapshot dir itself is used in addition to the group dir
lock. The lock is used to avoid races with forget and prune, while
having more granularity than the group lock (i.e. the group lock is
necessary to prevent more than one backup per group, but the snapshot
lock still allows backups unrelated to the currently running to be
forgotten/pruned).
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
Attempt to lock the backup directory to be deleted, if it works keep the
lock until the deletion is complete. This way we ensure that no other
locking operation (e.g. using a snapshot as base for another backup) can
happen concurrently.
Signed-off-by: Stefan Reiter <s.reiter@proxmox.com>
an encrypted Index should never reference a plain-text chunk, and an
unencrypted Index should never reference an encrypted chunk.
Signed-off-by: Fabian Grünbichler <f.gruenbichler@proxmox.com>
Dominik Csapak
Fabian Grünbichler
Dietmar Maurer
Wolfgang Bumiller
Stefan Reiter
Thomas Lamprecht
Hannes Laimer