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17 Commits

Author SHA1 Message Date
Sandy Luppino
22aba81074 cmd/mount2: fix NFS directory listings by supporting non-zero Seekdir offsets 
Seekdir handled only a rewind to offset 0 and returned ENOTSUP otherwise.
The stateless kernel NFS server opens a fresh directory handle and seeks to
the last returned cookie on every readdir continuation, so any listing
spanning more than one readdir batch failed over NFS. dirStream is a
snapshot taken at Readdir time and go-fuse assigns each entry a sequential
offset, so seeking to off positions the stream at index off; off == 0 still
resets to the start, preserving the rewind/re-read behaviour.

Before: ls of a directory that spans more than one readdir batch failed
over NFS with "Unknown error 524".
After: it lists correctly.

Adds TestDirStreamSeekdir covering rewind, mid-stream resume and the EOF
clamp. The full NFS path was validated against a real Linux
nfs-kernel-server export over NFSv3, NFSv4.0 and NFSv4.2.

Fixes #9547
 2026-07-01 16:37:54 +01:00
Sandy Luppino
92b78aefa4 cmd/mount2: fix ESTALE over NFS by reporting stable inode numbers 
setAttr left attr.Ino unset (0) and the NewInode sites left StableAttr.Ino
unset, so the kernel saw inode 0 while the node identity differed, which
breaks NFS file-handle validation. Set both to the stable VFS inode. The
bazil cmd/mount backend does not hit this because its framework assigns
stable inodes automatically; go-fuse needs them set explicitly.

Before: chmod/chown/truncate on a just-written file through an
NFS-exported mount2 mount failed with ESTALE.
After: they succeed.

Exercising the NFS handle-validation path needs a kernel NFS server, so it
isn't covered by the local vfstest harness; validated against a real Linux
nfs-kernel-server export over NFSv3, NFSv4.0 and NFSv4.2.

#9547
 2026-07-01 16:37:54 +01:00
Sandy Luppino
6eecd45bed cmd/mount2: fix NFS file creation by implementing Mknod 
The kernel NFS server creates regular files with MKNOD (it
creates-then-opens, so vfs_create routes through fuse_create -> FUSE_MKNOD
when there is no open intent), but mount2 only implemented Create
(FUSE_CREATE, used by local and SMB clients). Without Mknod every NFS file
creation failed with ENOTSUPP. This mirrors the cmd/mount mknod handler from
#2115.

Before: touch through an NFS-exported mount2 mount failed with ENOTSUPP.
After: files create normally.

Exercising this needs a kernel NFS server, so it isn't covered by the
local vfstest harness; validated against a real Linux nfs-kernel-server
export over NFSv3, NFSv4.0 and NFSv4.2.

#9547
 2026-07-01 16:37:54 +01:00
Janne Beate Bakeng
00bd00d83d mount2: fix empty directory listings on re-read 
With cmd/mount2, reading a directory more than once returned the correct
entries on the first read but nothing on subsequent reads. Plain `ls`
triggers this: it does lseek(fd, 0, SEEK_SET) to rewind the directory
before a second getdents.

go-fuse v2.9.0 rewinds a directory stream by calling Seekdir on the
FileSeekdirer interface. dirStream did not implement it, so go-fuse
returned ENOTSUP and produced an empty listing on every read after the
first.

This implements Seekdir on dirStream: a rewind to offset 0 resets the
stream to the start, restoring correct listings on re-read. Non-zero
offsets are uncommon for in-memory listings and still return ENOTSUP,
matching go-fuse's own default. A compile-time interface assertion is
added so signature drift on future go-fuse updates is caught at build
time.

Before: second and subsequent reads of a directory returned no entries.
After: directories list correctly on every read.

See: https://github.com/hanwen/go-fuse/issues/549
Co-authored-by: Nick Craig-Wood <nick@craig-wood.com>
 2026-06-01 12:06:03 +01:00
Filipe Azevedo
d629102fa6 mount2: introduce symlink support #2975 2024-12-13 12:43:20 +00:00
Filipe Azevedo
7f1240516e mount2: Fix missing . and .. entries 2024-12-13 12:43:20 +00:00
albertony
68bf6aa584 build: remove build constraint syntax for go 1.16 and older 2024-04-18 16:53:55 +02:00
Nick Craig-Wood
a67688dcc7 mount,cmount,mount2: add --direct-io flag to force uncached access 
This change adds the --direct-io flag to the mount. This means the
page cache is completely bypassed for reads and writes. No read-ahead
takes place. Shared mmap is disabled.

This is useful to accurately read files which may change length
frequently on the source.
 2024-03-26 17:32:11 +00:00
Anagh Kumar Baranwal
2520c05c4b mount2: disable xattrs 
Signed-off-by: Anagh Kumar Baranwal <6824881+darthShadow@users.noreply.github.com>
 2023-04-30 17:56:47 +01:00
Anagh Kumar Baranwal
f7f5e87632 mount2: fixed statfs 
Signed-off-by: Anagh Kumar Baranwal <6824881+darthShadow@users.noreply.github.com>
 2023-04-30 17:56:47 +01:00
Ivan Andreev
24de896df2 build: apply gofmt from golang 1.17 2021-09-09 20:43:59 +03:00
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
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
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
6ca7198f57 mount: fix disappearing cwd problem - fixes #4104 
Before this change, the current working directory could disappear
according to the Linux kernel.

This was caused by mount returning different nodes with the same
information in.

This change uses vfs.Node.SetSys to cache the information so we always
return the same node.
 2020-05-04 11:38:07 +01:00
Nick Craig-Wood
2b268f9724 build: fixup formatting after go1.14 go fmt changes 2020-02-28 16:58:33 +00:00
Nick Craig-Wood
8318020387 Implement mount2 with go-fuse 
This passes the tests and works efficiently with the non sequential vfs ReadAt fix.
 2020-02-11 14:28:13 +00:00