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Add functionality for removing a attribute file. In case a file is (re-)moved

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we will later remove the attribute backing file using this.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30887 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Michael Lotz 2009-05-28 01:55:43 +00:00
parent 56b2febaad
commit dfada88840
1 changed files with 63 additions and 0 deletions
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63
src/add-ons/kernel/file_systems/layers/attribute_overlay/attribute_overlay.cpp
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@ -74,6 +74,7 @@ public:
status_t GetAttributeFile(AttributeFile **attributeFile);
status_t WriteAttributeFile();
status_t RemoveAttributeFile();
private:
OverlayVolume * fVolume;
@ -97,6 +98,8 @@ public:
status_t CreateEmpty();
status_t WriteAttributeFile(fs_volume *overlay,
fs_volume *volume, fs_vnode *vnode);
status_t RemoveAttributeFile(fs_volume *overlay,
fs_volume *volume, fs_vnode *vnode);
status_t ReadAttributeDir(struct dirent *dirent,
size_t bufferSize, uint32 *numEntries,
@ -274,6 +277,21 @@ OverlayInode::WriteAttributeFile()
}
status_t
OverlayInode::RemoveAttributeFile()
{
if (fAttributeFile == NULL)
return B_NO_INIT;
status_t result = fAttributeFile->InitCheck();
if (result != B_OK)
return result;
return fAttributeFile->RemoveAttributeFile(Volume(), SuperVolume(),
&fSuperVnode);
}
// #pragma mark AttributeFile
@ -643,6 +661,51 @@ close_and_put:
}
status_t
AttributeFile::RemoveAttributeFile(fs_volume *overlay, fs_volume *volume,
fs_vnode *vnode)
{
if (fAttributeDirInode == 0 || fAttributeFileInode == 0) {
// there is no backing file at all yet
return B_OK;
}
char nameBuffer[B_FILE_NAME_LENGTH];
nameBuffer[sizeof(nameBuffer) - 1] = 0;
status_t result = vnode->ops->get_vnode_name(volume, vnode, nameBuffer,
sizeof(nameBuffer) - 1);
if (result != B_OK) {
TRACE_ALWAYS("failed to get vnode name: %s\n", strerror(result));
return result;
}
OverlayInode *overlayInode = NULL;
result = get_vnode(overlay, fAttributeDirInode, (void **)&overlayInode);
if (result != B_OK) {
TRACE_ALWAYS("getting attribute directory vnode failed: %s\n",
strerror(result));
return result;
}
fs_vnode attributeDir = *overlayInode->SuperVnode();
if (attributeDir.ops->unlink == NULL) {
TRACE_ALWAYS("cannot remove attribute file, unlink hook missing\n");
put_vnode(volume, fAttributeDirInode);
return B_UNSUPPORTED;
}
result = attributeDir.ops->unlink(volume, &attributeDir, nameBuffer);
if (result != B_OK) {
TRACE_ALWAYS("failed to unlink attribute file: %s\n", strerror(result));
put_vnode(volume, fAttributeDirInode);
return result;
}
put_vnode(volume, fAttributeDirInode);
return B_OK;
}
uint32
AttributeFile::CountAttributes()
{