summaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
authorAxel Dörfler <axeld@pinc-software.de>2010-11-09 20:34:59 (GMT)
committerAxel Dörfler <axeld@pinc-software.de>2010-11-09 20:34:59 (GMT)
commitea75a051ad0471a7fdeecd3be146bf73ca640716 (patch)
tree736f6a6eb30653d3fe2835115866b7f5bbd2c41b
parent48ec4fbb40a9ac5327e0351486946403d0b533b8 (diff)
* Applied patch by Rohit Yadav that fixes #6750 for ext2. Thanks a lot!hrev39379
* Fixed warning in Inode::WriteAt(), but left warnings in kernel_interface.cpp in there; I guess that's work in progress (although having the io hook would be nice). git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39379 a95241bf-73f2-0310-859d-f6bbb57e9c96
-rw-r--r--src/add-ons/kernel/file_systems/ext2/Inode.cpp73
-rw-r--r--src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp91
2 files changed, 96 insertions, 68 deletions
diff --git a/src/add-ons/kernel/file_systems/ext2/Inode.cpp b/src/add-ons/kernel/file_systems/ext2/Inode.cpp
index e9e2c65..7c7ed57 100644
--- a/src/add-ons/kernel/file_systems/ext2/Inode.cpp
+++ b/src/add-ons/kernel/file_systems/ext2/Inode.cpp
@@ -6,9 +6,9 @@
#include "Inode.h"
-#include <fs_cache.h>
#include <string.h>
#include <util/AutoLock.h>
+#include <NodeMonitor.h>
#include "CachedBlock.h"
#include "DataStream.h"
@@ -51,7 +51,7 @@ Inode::Inode(Volume* volume, ino_t id)
fHasExtraAttributes = (fNodeSize == sizeof(ext2_inode)
&& fNode.ExtraInodeSize() + EXT2_INODE_NORMAL_SIZE
== sizeof(ext2_inode));
-
+
if (IsDirectory() || (IsSymLink() && Size() < 60)) {
TRACE("Inode::Inode(): Not creating the file cache\n");
fCached = false;
@@ -130,7 +130,7 @@ Inode::WriteBack(Transaction& transaction)
if (status != B_OK)
return status;
}
-
+
CachedBlock cached(fVolume);
uint8* inodeBlockData = cached.SetToWritable(transaction, blockNum);
if (inodeBlockData == NULL)
@@ -140,7 +140,7 @@ Inode::WriteBack(Transaction& transaction)
"index: %lu, inode size: %lu, node size: %lu, this: %p, node: %p\n",
fID, blockNum, inodeBlockData, fVolume->InodeBlockIndex(fID),
fVolume->InodeSize(), fNodeSize, this, &fNode);
- memcpy(inodeBlockData +
+ memcpy(inodeBlockData +
fVolume->InodeBlockIndex(fID) * fVolume->InodeSize(),
(uint8*)&fNode, fNodeSize);
@@ -187,32 +187,39 @@ Inode::UpdateNodeFromDisk()
status_t
Inode::CheckPermissions(int accessMode) const
{
- uid_t user = geteuid();
- gid_t group = getegid();
-
// you never have write access to a read-only volume
- if (accessMode & W_OK && fVolume->IsReadOnly())
+ if ((accessMode & W_OK) != 0 && fVolume->IsReadOnly())
return B_READ_ONLY_DEVICE;
- // root users always have full access (but they can't execute files without
- // any execute permissions set)
- if (user == 0) {
- if (!((accessMode & X_OK) != 0 && (Mode() & S_IXUSR) == 0)
- || S_ISDIR(Mode()))
- return B_OK;
- }
-
- // shift mode bits, to check directly against accessMode
+ // get node permissions
mode_t mode = Mode();
- if (user == (uid_t)fNode.UserID())
- mode >>= 6;
- else if (group == (gid_t)fNode.GroupID())
- mode >>= 3;
-
- if (accessMode & ~(mode & S_IRWXO))
- return B_NOT_ALLOWED;
+ int userPermissions = (mode & S_IRWXU) >> 6;
+ int groupPermissions = (mode & S_IRWXG) >> 3;
+ int otherPermissions = mode & S_IRWXO;
+
+ // get the node permissions for this uid/gid
+ int permissions = 0;
+ uid_t uid = geteuid();
+ gid_t gid = getegid();
+
+ if (uid == 0) {
+ // user is root
+ // root has always read/write permission, but at least one of the
+ // X bits must be set for execute permission
+ permissions = userPermissions | groupPermissions | otherPermissions
+ | R_OK | W_OK;
+ } else if (uid == (uid_t)fNode.UserID()) {
+ // user is node owner
+ permissions = userPermissions;
+ } else if (gid == (gid_t)fNode.GroupID()) {
+ // user is in owning group
+ permissions = groupPermissions;
+ } else {
+ // user is one of the others
+ permissions = otherPermissions;
+ }
- return B_OK;
+ return (accessMode & ~permissions) == 0 ? B_OK : B_NOT_ALLOWED;
}
@@ -321,8 +328,8 @@ Inode::FindBlock(off_t offset, off_t& block, uint32 *_count)
if (_count) {
*_count = 1;
uint32 nextBlock = block;
- while (((++index & (perBlock - 1)) != 0)
- && indirectBlocks[index & (perBlock - 1)]
+ while (((++index & (perBlock - 1)) != 0)
+ && indirectBlocks[index & (perBlock - 1)]
== ++nextBlock)
(*_count)++;
}
@@ -391,9 +398,11 @@ Inode::WriteAt(Transaction& transaction, off_t pos, const uint8* buffer,
// NOTE: Debugging info to find why sometimes resize doesn't happen
size_t length = *_length;
+#ifdef TRACE_EXT2
off_t oldEnd = pos + length;
TRACE("Inode::WriteAt(): Old calc for end? %x:%x\n",
(int)(oldEnd >> 32), (int)(oldEnd & 0xFFFFFFFF));
+#endif
off_t end = pos + (off_t)length;
off_t oldSize = Size();
@@ -564,7 +573,7 @@ Inode::Unlink(Transaction& transaction)
if (firstOrphanID != 0) {
Vnode firstOrphan(fVolume, firstOrphanID);
Inode* nextOrphan;
-
+
status = firstOrphan.Get(&nextOrphan);
if (status != B_OK)
return status;
@@ -625,7 +634,7 @@ Inode::Create(Transaction& transaction, Inode* parent, const char* name,
Vnode vnode(volume, entryID);
Inode* inode;
-
+
status = vnode.Get(&inode);
if (status != B_OK) {
TRACE("Inode::Create() Failed to get the inode from the "
@@ -720,7 +729,7 @@ Inode::Create(Transaction& transaction, Inode* parent, const char* name,
inode->SetAccessTime(&timespec);
inode->SetCreationTime(&timespec);
inode->SetModificationTime(&timespec);
-
+
if (sizeof(ext2_inode) < volume->InodeSize())
node.SetExtraInodeSize(sizeof(ext2_inode) - EXT2_INODE_NORMAL_SIZE);
@@ -979,9 +988,9 @@ Inode::_SetNumBlocks(uint64 numBlocks)
if (numBlocks > 0xffffffffffffULL) {
fNode.SetFlag(EXT2_INODE_HUGE_FILE);
numBlocks /= (fVolume->BlockSize() / 512);
- } else
+ } else
fNode.ClearFlag(EXT2_INODE_HUGE_FILE);
-
+
fNode.SetNumBlocks64(numBlocks);
return B_OK;
}
diff --git a/src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp b/src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp
index b9089f0..c370053 100644
--- a/src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp
+++ b/src/add-ons/kernel/file_systems/ext2/kernel_interface.cpp
@@ -257,7 +257,7 @@ ext2_remove_vnode(fs_volume* _volume, fs_vnode* _node, bool reenter)
status = inode->WriteBack(transaction);
if (status != B_OK)
return status;
-
+
TRACE("ext2_remove_vnode(): Freeing inode\n");
status = volume->FreeInode(transaction, inode->ID(), inode->IsDirectory());
@@ -414,7 +414,7 @@ ext2_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
off_t blockOffset = block << volume->BlockShift();
uint32 blockLength = volume->BlockSize() * count;
- if (index > 0 && (vecs[index - 1].offset
+ if (index > 0 && (vecs[index - 1].offset
== blockOffset - vecs[index - 1].length
|| (vecs[index - 1].offset == -1 && block == 0))) {
vecs[index - 1].length += blockLength;
@@ -470,17 +470,17 @@ ext2_lookup(fs_volume* _volume, fs_vnode* _directory, const char* name,
HTree htree(volume, directory);
DirectoryIterator* iterator;
-
+
status = htree.Lookup(name, &iterator);
if (status != B_OK)
return status;
-
+
ObjectDeleter<DirectoryIterator> iteratorDeleter(iterator);
status = iterator->FindEntry(name, _vnodeID);
if (status != B_OK)
return status;
-
+
return get_vnode(volume->FSVolume(), *_vnodeID, NULL);
}
@@ -525,7 +525,7 @@ ext2_ioctl(fs_volume* _volume, fs_vnode* _node, void* _cookie, uint32 cmd,
}
TRACE("ioctl: Blocks cleared\n");
-
+
transaction.Done();
transaction.Start(volume->GetJournal());
}
@@ -568,7 +568,7 @@ ext2_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* stat)
inode->GetModificationTime(&stat->st_mtim);
inode->GetChangeTime(&stat->st_ctim);
inode->GetCreationTime(&stat->st_crtim);
-
+
stat->st_size = inode->Size();
stat->st_blocks = (inode->Size() + 511) / 512;
@@ -588,59 +588,72 @@ ext2_write_stat(fs_volume* _volume, fs_vnode* _node, const struct stat* stat,
Inode* inode = (Inode*)_node->private_node;
- status_t status = inode->CheckPermissions(W_OK);
- if (status < B_OK)
- return status;
+ ext2_inode& node = inode->Node();
+ bool updateTime = false;
+ uid_t uid = geteuid();
+
+ bool isOwnerOrRoot = uid == 0 || uid == (uid_t)node.UserID();
+ bool hasWriteAccess = inode->CheckPermissions(W_OK) == B_OK;
TRACE("ext2_write_stat: Starting transaction\n");
Transaction transaction(volume->GetJournal());
inode->WriteLockInTransaction(transaction);
- bool updateTime = false;
-
- if ((mask & B_STAT_SIZE) != 0) {
+ if ((mask & B_STAT_SIZE) != 0 && inode->Size() != stat->st_size) {
if (inode->IsDirectory())
return B_IS_A_DIRECTORY;
if (!inode->IsFile())
return B_BAD_VALUE;
+ if (!hasWriteAccess)
+ return B_NOT_ALLOWED;
TRACE("ext2_write_stat: Old size: %ld, new size: %ld\n",
(long)inode->Size(), (long)stat->st_size);
- if (inode->Size() != stat->st_size) {
- off_t oldSize = inode->Size();
- status = inode->Resize(transaction, stat->st_size);
- if(status != B_OK)
- return status;
+ off_t oldSize = inode->Size();
- if ((mask & B_STAT_SIZE_INSECURE) == 0) {
- rw_lock_write_unlock(inode->Lock());
- inode->FillGapWithZeros(oldSize, inode->Size());
- rw_lock_write_lock(inode->Lock());
- }
+ status_t status = inode->Resize(transaction, stat->st_size);
+ if(status != B_OK)
+ return status;
- updateTime = true;
+ if ((mask & B_STAT_SIZE_INSECURE) == 0) {
+ rw_lock_write_unlock(inode->Lock());
+ inode->FillGapWithZeros(oldSize, inode->Size());
+ rw_lock_write_lock(inode->Lock());
}
- }
- ext2_inode& node = inode->Node();
+ updateTime = true;
+ }
if ((mask & B_STAT_MODE) != 0) {
+ // only the user or root can do that
+ if (!isOwnerOrRoot)
+ return B_NOT_ALLOWED;
node.UpdateMode(stat->st_mode, S_IUMSK);
updateTime = true;
}
if ((mask & B_STAT_UID) != 0) {
+ // only root should be allowed
+ if (uid != 0)
+ return B_NOT_ALLOWED;
node.SetUserID(stat->st_uid);
updateTime = true;
}
+
if ((mask & B_STAT_GID) != 0) {
+ // only the user or root can do that
+ if (!isOwnerOrRoot)
+ return B_NOT_ALLOWED;
node.SetGroupID(stat->st_gid);
updateTime = true;
}
if ((mask & B_STAT_MODIFICATION_TIME) != 0 || updateTime
|| (mask & B_STAT_CHANGE_TIME) != 0) {
+ // the user or root can do that or any user with write access
+ if (!isOwnerOrRoot && !hasWriteAccess)
+ return B_NOT_ALLOWED;
struct timespec newTimespec = { 0, 0};
if ((mask & B_STAT_MODIFICATION_TIME) != 0)
@@ -655,10 +668,14 @@ ext2_write_stat(fs_volume* _volume, fs_vnode* _node, const struct stat* stat,
inode->SetModificationTime(&newTimespec);
}
- if ((mask & B_STAT_CREATION_TIME) != 0)
+ if ((mask & B_STAT_CREATION_TIME) != 0) {
+ // the user or root can do that or any user with write access
+ if (!isOwnerOrRoot && !hasWriteAccess)
+ return B_NOT_ALLOWED;
inode->SetCreationTime(&stat->st_crtim);
+ }
- status = inode->WriteBack(transaction);
+ status_t status = inode->WriteBack(transaction);
if (status == B_OK)
status = transaction.Done();
if (status == B_OK)
@@ -817,7 +834,7 @@ static status_t
ext2_link(fs_volume* volume, fs_vnode* dir, const char* name, fs_vnode* node)
{
// TODO
-
+
return B_NOT_SUPPORTED;
}
@@ -943,7 +960,7 @@ ext2_rename(fs_volume* _volume, fs_vnode* _oldDir, const char* oldName,
const HTreeRoot* data = (const HTreeRoot*)cached.SetTo(blockNum);
parentID = data->dotdot.InodeID();
- } while (parentID != oldID && parentID != oldDirID
+ } while (parentID != oldID && parentID != oldDirID
&& parentID != EXT2_ROOT_NODE);
if (parentID == oldID)
@@ -1013,7 +1030,7 @@ ext2_rename(fs_volume* _volume, fs_vnode* _oldDir, const char* oldName,
return status;
} else
return status;
-
+
// Remove entry from source folder
status = oldIterator->RemoveEntry(transaction);
if (status != B_OK)
@@ -1047,7 +1064,7 @@ ext2_rename(fs_volume* _volume, fs_vnode* _oldDir, const char* oldName,
if (status != B_OK) {
entry_cache_remove(volume->ID(), oldDirectory->ID(), newName);
entry_cache_add(volume->ID(), newDirectory->ID(), oldName, oldID);
-
+
return status;
}
@@ -1237,7 +1254,7 @@ ext2_read_link(fs_volume *_volume, fs_vnode *_node, char *buffer,
static status_t
ext2_create_dir(fs_volume* _volume, fs_vnode* _directory, const char* name,
int mode)
-{
+{
TRACE("ext2_create_dir()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* directory = (Inode*)_directory->private_node;
@@ -1416,7 +1433,7 @@ ext2_free_dir_cookie(fs_volume *_volume, fs_vnode *_node, void *_cookie)
}
-static status_t
+static status_t
ext2_open_attr_dir(fs_volume *_volume, fs_vnode *_node, void **_cookie)
{
Inode* inode = (Inode*)_node->private_node;
@@ -1512,7 +1529,7 @@ ext2_open_attr(fs_volume* _volume, fs_vnode* _node, const char* name,
int openMode, void** _cookie)
{
TRACE("%s()\n", __FUNCTION__);
-
+
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
Attribute attribute(inode);
@@ -1610,6 +1627,7 @@ fs_volume_ops gExt2VolumeOps = {
&ext2_get_vnode,
};
+
fs_vnode_ops gExt2VnodeOps = {
/* vnode operations */
&ext2_lookup,
@@ -1680,9 +1698,9 @@ fs_vnode_ops gExt2VnodeOps = {
NULL, //&ext2_write_attr_stat,
NULL, //&ext2_rename_attr,
NULL, //&ext2_remove_attr,
-
};
+
static file_system_module_info sExt2FileSystem = {
{
"file_systems/ext2" B_CURRENT_FS_API_VERSION,
@@ -1705,6 +1723,7 @@ static file_system_module_info sExt2FileSystem = {
NULL,
};
+
module_info *modules[] = {
(module_info *)&sExt2FileSystem,
NULL,