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test(fuse): drop the known-bug matchers the runs confirmed fixed

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The confirmation run on 812eb3d (PDFS_SIM_KNOWN=fail, twelve seeds)
passed every profile, so no open bug is tolerated any more: the call,
hang and damage matchers for B125 to B134 go, and any of them now fails
the seed. B126, B128 and B133 were fixed with B138, B162 and B137;
B134 stays open with local_first off only, which the runs do not mount.
This commit is contained in:
nvrl committed 2026-10-05 05:15:19 +02:00
1 parent 812eb3d0bc
commit 9291580fd6
4 files changed
+56 -423
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crates/pdfs-fuse/src/sim/run.rs
+19 -398
View File
@@ -22,14 +22,9 @@
//! one wrote down, but in-flight work is let finish rather than cut. A kill
//! at an arbitrary point needs the daemon in a process of its own.
//!
//! A call that answers otherwise than the model says fails the run, unless it
//! is one of the [`KNOWN`] open bugs. Those are counted instead and the model
//! takes the call back, or the seed ends there when the bug leaves the mount
//! where the model cannot follow, so the runs stay a regression net until
//! they are fixed. A file gone, or a conflict copy the drain made of one of
//! the client's own, is counted too when a known bug explains it
//! (`Run::known_damage`), and so is a hang the stacks show is one of the
//! [`KNOWN_HANGS`]. `PDFS_SIM_KNOWN=fail` fails on all of them.
//! Any of these fails the seed. No open bug is tolerated: the matchers that
//! counted the ones still open instead (B125 to B134) went once a run on
//! 812eb3d passed every profile without them.
//!
//! The runs are ignored by default because they mount FUSE; run them with
//! `cargo test -p pdfs-fuse --lib sim::run -- --ignored --test-threads=1`.
@@ -42,105 +37,11 @@ use std::io::{self, Read, Seek, SeekFrom, Write};
use std::path::{Path, PathBuf};
use std::time::{Duration, Instant};
use std::collections::BTreeMap;
use proton_drive_rs::proton_sdk::ids::NodeUid;
use super::daemon::{Daemon, scratch, take_logged, wait_until};
use super::fake_drive::{Entry, FakeDrive, Faults};
use super::model::{FsOp, Model, Tree, data, join, name_of, parent_of};
use super::model::{FsOp, Model, Tree, data, join};
use super::rng::Rng;
use super::watchdog::{Hung, Watchdog};
/// An open bug in `docs/BUGS.md` the runs tolerate.
struct Known {
bug: &'static str,
/// Whether a call that answered `errno` against the model's word, with
/// lines `logged` at `INFO` and above meanwhile and `before` it, is this
/// bug. `model` is from before the call.
is: fn(model: &Model, op: &FsOp, errno: i32, logged: &[String], before: &[String]) -> bool,
/// Whether it also left the mount where the model cannot follow, so the
/// seed ends there.
ends_seed: fn(model: &Model, op: &FsOp) -> bool,
}
const KNOWN: &[Known] = &[
// A replacing rename trashes what it replaces first, so Drive refuses the
// name only when it holds a node the mount has forgotten: the create of
// the replaced file landed after its op was dropped.
Known {
bug: "B129",
is: |model, op, errno, logged, _| {
let FsOp::Rename { to, .. } = op else {
return false;
};
errno == libc::EIO
&& model.tree().contains_key(to)
&& logged
.iter()
.any(|line| line.starts_with("rename failed") && line.contains("AlreadyExists"))
},
// The model made the rename, and Drive holds a node the mount does
// not know.
ends_seed: |_, _| true,
},
// A folder made offline is listed on Drive once its listing has been
// invalidated, and Drive does not know it, or does not list it yet. Only
// the client writes its folder, so a folder of its own is never really
// gone.
Known {
bug: "B125",
is: |_, _, errno, logged, _| {
matches!(errno, libc::EIO | libc::ENOENT)
&& logged.iter().any(|line| {
line.starts_with("enumerate folder children failed")
&& line.contains("DoesNotExist")
})
},
// The folder keeps failing to list, and what is in it can come back
// as gone, so the mount no longer follows the model.
ends_seed: |_, _| true,
},
// A restart forgets the listings served offline, so the first lookup
// lists a folder on Drive, which does not hold what is still queued for
// it.
Known {
bug: "B132",
is: |_, _, errno, _, before| {
errno == libc::ENOENT
&& before
.iter()
.any(|line| line.starts_with("lost the connection to Proton"))
&& before
.iter()
.any(|line| line.starts_with("restored pending ops"))
},
// The listing stays without it until something relists the folder.
ends_seed: |_, _| true,
},
];
/// An open bug in `docs/BUGS.md` that hangs a call, which the runs tolerate.
/// The seed ends there, since the watchdog aborted the mounts.
struct KnownHang {
bug: &'static str,
/// Whether the stacks the watchdog kept show this bug.
is: fn(stacks: &str) -> bool,
}
const KNOWN_HANGS: &[KnownHang] = &[
// A runtime worker invalidating a file's pages waits for the page lock
// of a read, whose fetch waits for a timer that no worker drives.
KnownHang {
bug: "B130",
is: |stacks| {
stacks.split("\nthread ").any(|thread| {
thread.contains("\"tokio-rt-worker\", state D")
&& thread.contains("NotifyBatch>::flush")
})
},
},
];
use super::watchdog::Watchdog;
/// What a run looks like.
pub(crate) struct Profile {
@@ -178,16 +79,6 @@ const LOG_TAIL: usize = 40;
/// for the last run and the mount.
const STALL: Duration = Duration::from_secs(120);
/// What a known bug left on Drive in place of a file, and how the model
/// takes it in.
struct KnownDamage {
bug: &'static str,
path: String,
/// The conflict copy it made, if it made one.
copy: Option<String>,
change: FsOp,
}
struct Client {
daemon: Option<Daemon>,
model: Model,
@@ -213,25 +104,14 @@ struct Run {
clients: Vec<Client>,
log: Vec<String>,
started: Instant,
/// How often each [`KNOWN`] bug turned up.
known: BTreeMap<&'static str, usize>,
/// The known bug that ended the seed early, if one did.
ended_by: Option<&'static str>,
/// What the daemons logged at `INFO` and above so far.
logged: Vec<String>,
/// Files deleted while the drain held a write to them.
held: Vec<NodeUid>,
/// Those of them made again before it went on.
remade: Vec<NodeUid>,
watchdog: Watchdog,
}
/// Run `profile` on `seed`. It answers how often each known bug turned up,
/// or a report of what went wrong.
pub(crate) fn run(
seed: u64,
profile: &'static Profile,
) -> Result<BTreeMap<&'static str, usize>, String> {
/// Run `profile` on `seed`. It answers a report of what went wrong, if
/// anything did.
pub(crate) fn run(seed: u64, profile: &'static Profile) -> Result<(), String> {
let dir = scratch(&format!("{}-{seed}", profile.name));
let mut rng = Rng::new(seed);
let drive = FakeDrive::new();
@@ -242,18 +122,14 @@ pub(crate) fn run(
clients: Vec::new(),
log: Vec::new(),
started: Instant::now(),
known: BTreeMap::new(),
ended_by: None,
logged: Vec::new(),
held: Vec::new(),
remade: Vec::new(),
watchdog: Watchdog::new(&dir),
};
let outcome = run.execute(&dir, &mut rng);
run.watchdog.stop();
// A hang is what failed, whatever the aborted call answered.
let outcome = match run.watchdog.fired() {
Some(hung) => run.known_hang(&hung),
Some(hung) => Err(format!("liveness: {}", hung.what)),
None => outcome,
};
for client in &mut run.clients {
@@ -264,27 +140,13 @@ pub(crate) fn run(
match outcome {
Ok(()) => {
let _ = std::fs::remove_dir_all(&dir);
Ok(run.known)
Ok(())
}
Err(failure) => Err(run.report(&failure, &dir)),
}
}
impl Run {
/// Count `hung` if it is one of the [`KNOWN_HANGS`], or fail on it.
fn known_hang(&mut self, hung: &Hung) -> Result<(), String> {
let known = KNOWN_HANGS.iter().find(|known| (known.is)(&hung.stacks));
match known {
Some(known) if tolerate_known() => {
*self.known.entry(known.bug).or_default() += 1;
self.note(format!("known bug {}; the seed ends here", known.bug));
self.ended_by = Some(known.bug);
Ok(())
}
_ => Err(format!("liveness: {}", hung.what)),
}
}
fn execute(&mut self, dir: &Path, rng: &mut Rng) -> Result<(), String> {
for index in 0..self.profile.clients {
let client = self.drive.client(rng.next_u64(), (self.profile.faults)());
@@ -302,9 +164,6 @@ impl Run {
for step in 0..self.profile.steps {
let _watching = self.watchdog.arm(self.step_limit(), format!("step {step}"));
self.step(rng)?;
if self.ended_by.is_some() {
return Ok(());
}
}
let _watching = self.watchdog.arm(
self.profile.drain_budget + STALL,
@@ -413,18 +272,11 @@ impl Run {
data: bytes,
},
)?;
if self.ended_by.is_some() {
return Ok(());
}
if !wait_until(PICKUP_BUDGET, || held.reached()) {
self.note(format!("client {index}: nothing read {path} back"));
return Ok(());
}
self.syscall(index, FsOp::Unlink { path: path.clone() })?;
if self.ended_by.is_some() {
return Ok(());
}
self.held.push(uid.clone());
if rng.chance(0.5) {
self.syscall(
index,
@@ -433,7 +285,6 @@ impl Run {
data: data(rng),
},
)?;
self.remade.push(uid);
}
let faults = (self.profile.faults)();
let latency = Duration::from_millis(faults.latency_ms.1);
@@ -448,11 +299,9 @@ impl Run {
fn syscall(&mut self, index: usize, op: FsOp) -> Result<(), String> {
let client = &mut self.clients[index];
let root = client.root(index);
let model = client.model.clone();
let before = client.model.content(target(&op)).cloned();
let expected = client.model.apply(&op);
self.logged.extend(take_logged());
let logged_before = self.logged.len();
let start = Instant::now();
let actual = perform(&root, &op, before.as_deref());
let took = start.elapsed();
@@ -462,25 +311,7 @@ impl Run {
outcome(&actual)
));
let actual = actual?;
let logged = take_logged();
self.logged.extend(logged.iter().cloned());
if actual != expected
&& let Err(errno) = actual
&& tolerate_known()
&& let Some(known) = KNOWN.iter().find(|known| {
(known.is)(&model, &op, errno, &logged, &self.logged[..logged_before])
})
{
*self.known.entry(known.bug).or_default() += 1;
if (known.ends_seed)(&model, &op) {
self.note(format!("known bug {}; the seed ends here", known.bug));
self.ended_by = Some(known.bug);
} else {
self.note(format!("known bug {}; taken back", known.bug));
}
self.clients[index].model = model;
return Ok(());
}
self.logged.extend(take_logged());
if actual != expected {
return Err(format!(
"posix: client {index}: {} answered {}, expected {}",
@@ -517,61 +348,15 @@ impl Run {
}
// Each client's folder is its own, so a file of it gone from Drive was
// deleted by the client.
let own_deletes: Vec<String> = self
.logged
.iter()
.filter(|line| is_own_delete_kept(line))
.cloned()
.collect();
for line in own_deletes {
let bug = if self
.remade
.iter()
.any(|uid| line.contains(&format!(" uid={uid} ")))
{
// Made again while the drain held its write: the new file's
// write took the freed op id.
"B133"
} else if !self
.held
.iter()
.any(|uid| line.contains(&format!(" uid={uid} ")))
&& !line.contains(" name=\"recovered-")
{
// The tree still placed the file, so the drain looked before
// the unlink had dropped its write.
"B134"
} else {
if let Some(line) = self.logged.iter().find(|line| is_own_delete_kept(line)) {
return Err(format!(
"no false conflicts: the drain took a client's own delete for another device's: {line}"
));
};
if !tolerate_known() {
return Err(format!(
"no false conflicts: the drain took a client's own delete for another device's: {line}"
));
}
*self.known.entry(bug).or_default() += 1;
self.note(format!("known bug {bug}: {line}"));
}
let drive = self.drive_tree();
let mut explained = Vec::new();
for index in 0..self.clients.len() {
for damage in self.known_damage(index, &drive) {
*self.known.entry(damage.bug).or_default() += 1;
self.note(format!(
"known bug {}: client {index}'s {} landed as {:?}",
damage.bug, damage.path, damage.copy
));
let _ = self.clients[index].model.apply(&damage.change);
if let Some(copy) = damage.copy {
explained.push(join(&owned_folder(index), &copy));
}
}
}
let conflicts: Vec<String> = drive
.into_keys()
.filter(|path| is_conflict_copy(path) && !explained.contains(path))
.filter(|path| is_conflict_copy(path))
.collect();
if !conflicts.is_empty() {
return Err(format!("no false conflicts: {conflicts:?}"));
@@ -593,155 +378,18 @@ impl Run {
}
/// Whether every client's queue is empty and Drive holds what its model
/// says, but for what known bugs explain.
/// says.
fn landed(&self) -> bool {
let drive = self.drive_tree();
self.clients.iter().enumerate().all(|(index, client)| {
let mut model = client.model.clone();
for damage in self.known_damage(index, &drive) {
let _ = model.apply(&damage.change);
}
client
.daemon()
.pending()
.is_ok_and(|items| items.is_empty())
&& subtree(&drive, &owned_folder(index)) == *model.tree()
&& subtree(&drive, &owned_folder(index)) == *client.model.tree()
})
}
/// The files of client `index` that a known bug left otherwise on Drive
/// than the model says. A conflict copy takes Drive holding it with the
/// model's bytes, and the drain saying it made that copy for that name:
///
/// - B126: the file's queued create ran into its name while a queued
/// rename was about to free it, so it is there only as the copy.
/// - B127: the file's queued create landed but its answer was lost, so
/// the retry found it and made the copy next to it.
///
/// A lost file takes the drain saying it adopted a node for that name
/// whose queued trash then landed:
///
/// - B128: the file's queued create ran into the name of the file it
/// replaced and took that over, trash and all.
///
/// A conflict copy of a file the client deleted takes the drain saying it
/// kept that file's write as the copy, because Drive had the file in the
/// trash while the tree still placed it:
///
/// - B134: the unlink trashed the file on Drive before it dropped the
/// write.
fn known_damage(&self, index: usize, drive: &Tree) -> Vec<KnownDamage> {
if !tolerate_known() {
return Vec::new();
}
let drive = subtree(drive, &owned_folder(index));
let model = self.clients[index].model.tree();
let made_copy = |path: &str, copy: &str| {
let wanted = format!("wanted={:?}", name_of(path));
let name = format!("name={:?}", name_of(copy));
self.logged.iter().any(|line| {
line.starts_with("name is taken remotely; creating under a conflict name")
&& line.contains(&wanted)
&& line.contains(&name)
})
};
let adopted_trashed = |path: &str| {
let wanted = format!("wanted={:?}", name_of(path));
self.logged.iter().any(|line| {
line.starts_with("the name is held by our own unanswered create; adopting it")
&& line.contains(&wanted)
&& line.split(' ').any(|field| {
field.strip_prefix("twin=").is_some_and(|twin| {
let uid = format!("uid={twin}");
self.logged.iter().any(|line| {
line.starts_with("pending trash landed")
&& line.split(' ').any(|field| field == uid)
})
})
})
})
};
let kept_deleted = |copy: &str| {
let alt = format!(" alt={:?}", name_of(copy));
self.logged.iter().any(|line| {
line.starts_with("queued write landed as a conflict copy")
&& line.ends_with(&alt)
&& line.split(' ').any(|field| {
field.starts_with("uid=")
&& self.logged.iter().any(|kept| {
is_own_delete_kept(kept)
&& !kept.contains(" name=\"recovered-")
&& kept.split(' ').any(|other| other == field)
})
})
})
};
let mut damage = Vec::new();
for (copy, content) in &drive {
let Some(content) = content else { continue };
if !is_conflict_copy(copy) || model.contains_key(copy) {
continue;
}
if !kept_deleted(copy) {
continue;
}
damage.push(KnownDamage {
bug: "B134",
path: copy.clone(),
copy: Some(copy.clone()),
change: FsOp::Create {
path: copy.clone(),
data: content.clone(),
},
});
}
for (path, content) in model {
let Some(content) = content else { continue };
let copy = drive.iter().find(|(copy, other)| {
is_conflict_copy(copy)
&& !model.contains_key(*copy)
&& parent_of(copy) == parent_of(path)
&& other.as_ref() == Some(content)
&& made_copy(path, copy)
});
let Some((copy, _)) = copy else {
if !drive.contains_key(path) && adopted_trashed(path) {
damage.push(KnownDamage {
bug: "B128",
path: path.clone(),
copy: None,
change: FsOp::Unlink { path: path.clone() },
});
}
continue;
};
let (bug, change) = match drive.get(path) {
None => (
"B126",
FsOp::Rename {
from: path.clone(),
to: copy.clone(),
},
),
Some(Some(landed)) if landed == content => (
"B127",
FsOp::Create {
path: copy.clone(),
data: content.clone(),
},
),
Some(_) => continue,
};
damage.push(KnownDamage {
bug,
path: path.clone(),
copy: Some(copy.clone()),
change,
});
}
damage
}
fn difference(&self) -> String {
let drive = self.drive_tree();
let mut out = String::new();
@@ -894,11 +542,6 @@ fn subtree(tree: &Tree, folder: &str) -> Tree {
.collect()
}
/// Whether a known bug is counted rather than failing the run.
fn tolerate_known() -> bool {
std::env::var("PDFS_SIM_KNOWN").as_deref() != Ok("fail")
}
fn owned_folder(index: usize) -> String {
format!("c{index}")
}
@@ -974,21 +617,10 @@ pub(crate) fn run_seeds(profile: &'static Profile, default_seeds: u64) {
(1..=count).collect()
}
};
let mut failures = Vec::new();
let mut known = BTreeMap::<&str, usize>::new();
for seed in seeds {
match run(seed, profile) {
Ok(hits) => {
for (bug, count) in hits {
*known.entry(bug).or_default() += count;
}
}
Err(failure) => failures.push(failure),
}
}
if !known.is_empty() {
eprintln!("{}: known bugs turned up: {known:?}", profile.name);
}
let failures: Vec<String> = seeds
.into_iter()
.filter_map(|seed| run(seed, profile).err())
.collect();
assert!(failures.is_empty(), "\n{}", failures.join("\n\n"));
}
@@ -1131,15 +763,4 @@ mod tests {
&kept.replace("the file was trashed remotely", "revision changed")
));
}
#[test]
fn an_invalidation_stuck_on_a_page_lock_is_b130() {
let b130 = |stacks: &str| KNOWN_HANGS.iter().any(|known| (known.is)(stacks));
let stuck = "thread 1 \"fuser-0\", state S, waiting in fuse_dev_do_read\n\
\nthread 2 \"tokio-rt-worker\", state D, waiting in __folio_lock\n\
\x20 11: <pdfs_fuse::NotifyBatch>::flush\n";
assert!(b130(stuck));
assert!(!b130(&stuck.replace("state D", "state S")));
assert!(!b130(&stuck.replace("NotifyBatch", "Other")));
}
}
docs/BUGS.md
+29 -22
View File
@@ -1369,7 +1369,8 @@ fix, seed 1 of three-clients passes repeatedly with `PDFS_SIM_KNOWN=fail`.
## B134 — A file deleted online while the drain checks its write is kept as a conflict copy
**Status:** Open.
**Status:** Open, with `local_first` off only. By default an `unlink` drops the write and queues
the trash in one step, and the drain sends the trash.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile three-clients, seed 3).
`c.bin` was written, renamed to `f.txt` and deleted, all online. The drain logged "queued write
conflicts; keeping a conflict copy" for `f.txt`, with "the file was trashed remotely". The copy
@@ -1386,13 +1387,11 @@ B105's check asks whether the op is still queued, and it still is, so the drain
as a conflict copy of a file the user deleted. When the copy runs before the unlink discards the
staged blob, it lands next to where the file was.
**Test:** the simulation runs count such a conflict when the copy is named after the file, and
count a copy that lands. With `PDFS_SIM_KNOWN=fail`, seed 3 of three-clients fails on it when it
comes up, which depends on timing.
**Test:** none. The simulation runs mount with `local_first` on, so they no longer reach it.
## B133 — A file deleted while its upload is in flight can still come back as a recovered copy
**Status:** Open.
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile one-client-deletes, seed 3).
`y/e.md` was written, and the drain picked the write up. The step held the drain's read of the
node, deleted the file, and released the read. The next step wrote `a.txt`. The drain then logged
@@ -1411,13 +1410,16 @@ next op queued took the same id. `op_exists` found that other op and said the wr
wanted. A SQLite workload queues a write to the database right after deleting its journal, so
this is the usual case there, not a rare one.
**Test:** the simulation runs make the file again, or not, while the drain's read is held. When
they did, they count the drain's conflict copy of it. With `PDFS_SIM_KNOWN=fail` one-client-deletes
fails on it in every seed.
**Fix.** With B137's: schema 37 gives `pending_op` ids with `AUTOINCREMENT`, so an op queued
after a delete never takes the dropped op's id.
**Test:** the simulation runs make the file again, or not, while the drain's read is held, and
fail on any conflict copy the drain keeps of it. They counted it instead until the run on
812eb3d passed every profile on twelve seeds without the count.
## B132 — A folder whose mkdir is still queued is gone after a restart
**Status:** Fixed (unverified).
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile one-client-flaky, seed 4).
The first listing of the Drive root failed with the link down, and the client's folder `c0` was
made offline. The link came back, and the client restarted with 8 ops still queued, `c0`'s
@@ -1517,7 +1519,7 @@ since phase 3.
## B129 — A file deleted or replaced while its create is on the wire stays on Drive
**Status:** Fixed (unverified).
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile one-client-lan, seed 4).
`a.txt` was created, renamed to `b.txt` and then to `e.md` while its create was still queued.
A moment later `rename f.txt -> e.md` failed with `EIO`, and the daemon logged "rename failed"
@@ -1542,13 +1544,12 @@ the same transaction, and the drain sends it at once; if that fails it stays que
backoff. A create whose row is gone altogether gets such a trash too. A trash of a placeholder
whose create never landed is done without asking Drive.
**Test:** the simulation runs count a rename it fails and end the seed there. With
`PDFS_SIM_KNOWN=fail`, seed 4 of one-client-lan fails on it when it comes up, which depends
on timing.
**Test:** the simulation runs fail on it. They counted it instead until the run on 812eb3d
passed every profile on twelve seeds without the count.
## B128 — A file created offline over one deleted offline can be lost
**Status:** Open.
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile three-clients, seed 3).
While the link was down, `f.txt` was deleted and a new `f.txt` was made. Its first version had
not landed yet, so Drive held it empty. When the link came back, the drain logged "the name is
@@ -1567,12 +1568,15 @@ trash then trashed it. Only after the adoption check does the drain ask whether
holds the name (`has_pending_trash_named`), and the adoption does not exclude a node that has
one.
**Test:** the simulation runs count it and go on. With `PDFS_SIM_KNOWN=fail` the three-client
profile fails on it when it comes up, which depends on timing.
**Fix.** With B162's: the adoption skips a node this mount trashed (its `hidden` set), which a
queued trash puts it in, and the create waits for the trash to free the name (B144).
**Test:** the simulation runs fail on it. They counted it instead until the run on 812eb3d
passed every profile on twelve seeds without the count.
## B127 — A file created offline lands twice when the answer to its upload is lost
**Status:** Fixed (unverified).
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile one-client-flaky, seed 1).
The upload of a queued create timed out after Drive had made the file. On the next attempt the
drain logged "name is taken remotely; creating under a conflict name". Drive ended with the file
@@ -1590,12 +1594,12 @@ adopted, and the file is uploaded a second time under a conflict name.
blob then counts as uploaded. Sim test `a_create_whose_answer_was_lost_lands_once`. A write that
replaced the blob after the lost upload still forks a copy: the node holds the older bytes.
**Test:** the simulation runs count it and go on. With `PDFS_SIM_KNOWN=fail` the flaky profile
fails on it when it comes up, which depends on timing.
**Test:** the simulation runs fail on it. They counted it instead until the run on 812eb3d
passed every profile on twelve seeds without the count.
## B126 — A file created offline under a name an offline rename freed lands as a conflict copy
**Status:** Open.
**Status:** Fixed.
**Found:** 2026-10-03, by the simulation runs (`sim::run`, profile three-clients, seed 3).
While the link was down, `b.txt` was renamed to `c.bin`, and a new `b.txt` was made. When the link
came back, the drain logged "name is taken remotely; creating under a conflict name" for
@@ -1611,8 +1615,11 @@ when the name is held by a node whose trash is queued (`has_pending_trash_named`
queued rename is about to move it away. It treats the name as someone else's file and lands the
new one under a conflict name.
**Test:** the simulation runs count it and go on. With `PDFS_SIM_KNOWN=fail` the three-client
profile fails on it when it comes up, which depends on timing.
**Fix.** With B138's: the create also waits while a queued rename moves a node away from its
name (`Core::name_is_held`).
**Test:** the simulation runs fail on it. They counted it instead until the run on 812eb3d
passed every profile on twelve seeds without the count.
## B125 — A folder made offline fails with `EIO` once its listing is invalidated
docs/CHANGELOG.md
+5 -1
View File
@@ -138,8 +138,12 @@ by its local id, in the queue, the stored tree and pins alike.
the upload made is trashed as soon as it lands, so its name is free again (B129).
- **A delete queued while a rename is sent is no longer lost.** The rename landing could remove
the delete from the queue, leaving the file on Drive (B137).
- **A file made offline over one deleted offline is no longer lost.** Its upload could take
over the deleted file, and the delete then took the new bytes along with it (B128).
- **A file deleted while its upload is on the wire no longer comes back as a `recovered-…`
copy** when another file is made right after (B133).
- **A file made where another one is leaving no longer lands as a conflict copy.** Its upload
waits for the rename or trash that frees the name (B138).
waits for the rename or trash that frees the name (B126, B138).
- **A file closed just as its first upload lands keeps its last write.** The write was refused
and left in staging (B139).
- **Files made in a new folder are still there after a restart.** A folder that landed as the
docs/MILESTONE-3.0.0-STATUS.md
+3 -2
View File
@@ -104,8 +104,9 @@ Tracks `docs/MILESTONE-3.0.0.md`. Update it with every commit that moves a phase
It may be a kernel notice sent from a runtime worker by another path than B130's,
which a68dae9 (not yet pushed then) also takes off the runtime. CI now keeps a hung
run's stacks.
- [ ] Known-bug list in `sim/run.rs` is empty: none open; B125, B127, B129, B130 and B132
fixed but not yet confirmed by the runs. The confirmation run (`PDFS_SIM_KNOWN=fail`)
- [x] Known-bug list in `sim/run.rs` is empty: the run on 812eb3d (`PDFS_SIM_KNOWN=fail`,
twelve seeds) passed every profile, so the matchers are gone. That confirms B125 to
B133; B134 stays open with `local_first` off only, which the runs do not mount. The confirmation run (`PDFS_SIM_KNOWN=fail`)
on da013c2 failed `one_client_on_a_flaky_link` seeds 6 and 11 on two new bugs, both
after restarts: a write over a create never read back (B182) and a trash that forgot
what its create sent (B183). Replays with those fixed found a third: a create renamed