mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Jimmy TranandgVisor bot
f8a0a5a56c
- **Decoupled dentry and inode**: Cleanly separated dentry fields from the
file's actual metadata (permissions, size, etc.), now residing in the inode.
- **Dentry now holds inode pointer**: The dentry struct embeds a pointer to
the shared inode, reflecting the many-to-one relationship of hard links.
- **impl logic moved to inode**: The backend-specific logic (LISA FS
vs. Direct FS) is no longer part of the dentry struct. Instead, the
inode struct
is extended to handle these implementations.
- **Refactored Gofer client fs**: Updated the Gofer client filesystem logic
to work with the new dentry -> inode pointer structure.
- **Renamed files**: dentry_impl.go becomes inode_impl.go, and
{directfs/lisafs}_dentry.go are now {directfs/lisafs}_inode.go to match the
new design.
- **Disabled Save/Restore in link::IsSameFile**: Disabled save/restore in
this specific check due to complexities in maintaining inode consistency
across save/restore cycles. See comment in link.cc:45 for details.
- **New Link Tests**:
- HardLinkChangeMode: Verifies hard link behavior, including mode changes
across save/restore.
PiperOrigin-RevId: 793741989
48 lines
1.4 KiB
Go
48 lines
1.4 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package gofer
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import (
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"gvisor.dev/gvisor/pkg/abi/linux"
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"gvisor.dev/gvisor/pkg/context"
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"gvisor.dev/gvisor/pkg/sentry/vfs"
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)
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func (i *inode) isSymlink() bool {
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return i.fileType() == linux.S_IFLNK
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}
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// Precondition: d.isSymlink().
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func (d *dentry) readlink(ctx context.Context, mnt *vfs.Mount) (string, error) {
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if d.inode.fs.opts.interop != InteropModeShared {
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d.touchAtime(mnt)
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d.inode.dataMu.Lock()
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if d.inode.haveTarget {
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target := d.inode.target
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d.inode.dataMu.Unlock()
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return target, nil
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}
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}
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target, err := d.inode.readlinkImpl(ctx)
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if d.inode.fs.opts.interop != InteropModeShared {
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if err == nil {
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d.inode.haveTarget = true
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d.inode.target = target
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}
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d.inode.dataMu.Unlock() // +checklocksforce: guaranteed locked from above.
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}
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return target, err
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}
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