c1e8d35ef5
mlog_exit is used to record the exit status of a function. But because it is added in so many functions, if we enable it, the system logs get filled up quickly and cause too much I/O. So actually no one can open it for a production system or even for a test. This patch just try to remove it or change it. So: 1. if all the error paths already use mlog_errno, it is just removed. Otherwise, it will be replaced by mlog_errno. 2. if it is used to print some return value, it is replaced with mlog(0,...). mlog_exit_ptr is changed to mlog(0. All those mlog(0,...) will be replaced with trace events later. Signed-off-by: Tao Ma <boyu.mt@taobao.com>
572 lines
13 KiB
C
572 lines
13 KiB
C
/*
|
|
* linux/fs/ocfs2/ioctl.c
|
|
*
|
|
* Copyright (C) 2006 Herbert Poetzl
|
|
* adapted from Remy Card's ext2/ioctl.c
|
|
*/
|
|
|
|
#include <linux/fs.h>
|
|
#include <linux/mount.h>
|
|
#include <linux/compat.h>
|
|
|
|
#include <cluster/masklog.h>
|
|
|
|
#include "ocfs2.h"
|
|
#include "alloc.h"
|
|
#include "dlmglue.h"
|
|
#include "file.h"
|
|
#include "inode.h"
|
|
#include "journal.h"
|
|
|
|
#include "ocfs2_fs.h"
|
|
#include "ioctl.h"
|
|
#include "resize.h"
|
|
#include "refcounttree.h"
|
|
|
|
#include <linux/ext2_fs.h>
|
|
|
|
#define o2info_from_user(a, b) \
|
|
copy_from_user(&(a), (b), sizeof(a))
|
|
#define o2info_to_user(a, b) \
|
|
copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
|
|
|
|
/*
|
|
* This call is void because we are already reporting an error that may
|
|
* be -EFAULT. The error will be returned from the ioctl(2) call. It's
|
|
* just a best-effort to tell userspace that this request caused the error.
|
|
*/
|
|
static inline void __o2info_set_request_error(struct ocfs2_info_request *kreq,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
kreq->ir_flags |= OCFS2_INFO_FL_ERROR;
|
|
(void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags));
|
|
}
|
|
|
|
#define o2info_set_request_error(a, b) \
|
|
__o2info_set_request_error((struct ocfs2_info_request *)&(a), b)
|
|
|
|
static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
|
|
{
|
|
int status;
|
|
|
|
status = ocfs2_inode_lock(inode, NULL, 0);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
return status;
|
|
}
|
|
ocfs2_get_inode_flags(OCFS2_I(inode));
|
|
*flags = OCFS2_I(inode)->ip_attr;
|
|
ocfs2_inode_unlock(inode, 0);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
|
|
unsigned mask)
|
|
{
|
|
struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
handle_t *handle = NULL;
|
|
struct buffer_head *bh = NULL;
|
|
unsigned oldflags;
|
|
int status;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
status = ocfs2_inode_lock(inode, &bh, 1);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
|
|
status = -EACCES;
|
|
if (!is_owner_or_cap(inode))
|
|
goto bail_unlock;
|
|
|
|
if (!S_ISDIR(inode->i_mode))
|
|
flags &= ~OCFS2_DIRSYNC_FL;
|
|
|
|
handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
|
|
if (IS_ERR(handle)) {
|
|
status = PTR_ERR(handle);
|
|
mlog_errno(status);
|
|
goto bail_unlock;
|
|
}
|
|
|
|
oldflags = ocfs2_inode->ip_attr;
|
|
flags = flags & mask;
|
|
flags |= oldflags & ~mask;
|
|
|
|
/*
|
|
* The IMMUTABLE and APPEND_ONLY flags can only be changed by
|
|
* the relevant capability.
|
|
*/
|
|
status = -EPERM;
|
|
if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
|
|
(OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
|
|
if (!capable(CAP_LINUX_IMMUTABLE))
|
|
goto bail_unlock;
|
|
}
|
|
|
|
ocfs2_inode->ip_attr = flags;
|
|
ocfs2_set_inode_flags(inode);
|
|
|
|
status = ocfs2_mark_inode_dirty(handle, inode, bh);
|
|
if (status < 0)
|
|
mlog_errno(status);
|
|
|
|
ocfs2_commit_trans(osb, handle);
|
|
bail_unlock:
|
|
ocfs2_inode_unlock(inode, 1);
|
|
bail:
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
brelse(bh);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_blocksize(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_blocksize oib;
|
|
|
|
if (o2info_from_user(oib, req))
|
|
goto bail;
|
|
|
|
oib.ib_blocksize = inode->i_sb->s_blocksize;
|
|
oib.ib_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oib, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oib, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_clustersize(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_clustersize oic;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oic, req))
|
|
goto bail;
|
|
|
|
oic.ic_clustersize = osb->s_clustersize;
|
|
oic.ic_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oic, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oic, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_maxslots(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_maxslots oim;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oim, req))
|
|
goto bail;
|
|
|
|
oim.im_max_slots = osb->max_slots;
|
|
oim.im_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oim, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oim, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_label(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_label oil;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oil, req))
|
|
goto bail;
|
|
|
|
memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN);
|
|
oil.il_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oil, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oil, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_uuid(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_uuid oiu;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oiu, req))
|
|
goto bail;
|
|
|
|
memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1);
|
|
oiu.iu_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oiu, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oiu, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_fs_features(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_fs_features oif;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oif, req))
|
|
goto bail;
|
|
|
|
oif.if_compat_features = osb->s_feature_compat;
|
|
oif.if_incompat_features = osb->s_feature_incompat;
|
|
oif.if_ro_compat_features = osb->s_feature_ro_compat;
|
|
oif.if_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oif, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oif, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_journal_size(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_journal_size oij;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
|
|
if (o2info_from_user(oij, req))
|
|
goto bail;
|
|
|
|
oij.ij_journal_size = osb->journal->j_inode->i_size;
|
|
|
|
oij.ij_req.ir_flags |= OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oij, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oij, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_info_handle_unknown(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_request oir;
|
|
|
|
if (o2info_from_user(oir, req))
|
|
goto bail;
|
|
|
|
oir.ir_flags &= ~OCFS2_INFO_FL_FILLED;
|
|
|
|
if (o2info_to_user(oir, req))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(oir, req);
|
|
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* Validate and distinguish OCFS2_IOC_INFO requests.
|
|
*
|
|
* - validate the magic number.
|
|
* - distinguish different requests.
|
|
* - validate size of different requests.
|
|
*/
|
|
int ocfs2_info_handle_request(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
int status = -EFAULT;
|
|
struct ocfs2_info_request oir;
|
|
|
|
if (o2info_from_user(oir, req))
|
|
goto bail;
|
|
|
|
status = -EINVAL;
|
|
if (oir.ir_magic != OCFS2_INFO_MAGIC)
|
|
goto bail;
|
|
|
|
switch (oir.ir_code) {
|
|
case OCFS2_INFO_BLOCKSIZE:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
|
|
status = ocfs2_info_handle_blocksize(inode, req);
|
|
break;
|
|
case OCFS2_INFO_CLUSTERSIZE:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
|
|
status = ocfs2_info_handle_clustersize(inode, req);
|
|
break;
|
|
case OCFS2_INFO_MAXSLOTS:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
|
|
status = ocfs2_info_handle_maxslots(inode, req);
|
|
break;
|
|
case OCFS2_INFO_LABEL:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_label))
|
|
status = ocfs2_info_handle_label(inode, req);
|
|
break;
|
|
case OCFS2_INFO_UUID:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
|
|
status = ocfs2_info_handle_uuid(inode, req);
|
|
break;
|
|
case OCFS2_INFO_FS_FEATURES:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
|
|
status = ocfs2_info_handle_fs_features(inode, req);
|
|
break;
|
|
case OCFS2_INFO_JOURNAL_SIZE:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
|
|
status = ocfs2_info_handle_journal_size(inode, req);
|
|
break;
|
|
default:
|
|
status = ocfs2_info_handle_unknown(inode, req);
|
|
break;
|
|
}
|
|
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
|
|
u64 *req_addr, int compat_flag)
|
|
{
|
|
int status = -EFAULT;
|
|
u64 __user *bp = NULL;
|
|
|
|
if (compat_flag) {
|
|
#ifdef CONFIG_COMPAT
|
|
/*
|
|
* pointer bp stores the base address of a pointers array,
|
|
* which collects all addresses of separate request.
|
|
*/
|
|
bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
|
|
#else
|
|
BUG();
|
|
#endif
|
|
} else
|
|
bp = (u64 __user *)(unsigned long)(info->oi_requests);
|
|
|
|
if (o2info_from_user(*req_addr, bp + idx))
|
|
goto bail;
|
|
|
|
status = 0;
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
/*
|
|
* OCFS2_IOC_INFO handles an array of requests passed from userspace.
|
|
*
|
|
* ocfs2_info_handle() recevies a large info aggregation, grab and
|
|
* validate the request count from header, then break it into small
|
|
* pieces, later specific handlers can handle them one by one.
|
|
*
|
|
* Idea here is to make each separate request small enough to ensure
|
|
* a better backward&forward compatibility, since a small piece of
|
|
* request will be less likely to be broken if disk layout get changed.
|
|
*/
|
|
int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
|
|
int compat_flag)
|
|
{
|
|
int i, status = 0;
|
|
u64 req_addr;
|
|
struct ocfs2_info_request __user *reqp;
|
|
|
|
if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
|
|
(!info->oi_requests)) {
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
for (i = 0; i < info->oi_count; i++) {
|
|
|
|
status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
|
|
if (status)
|
|
break;
|
|
|
|
reqp = (struct ocfs2_info_request *)(unsigned long)req_addr;
|
|
if (!reqp) {
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
status = ocfs2_info_handle_request(inode, reqp);
|
|
if (status)
|
|
break;
|
|
}
|
|
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
struct inode *inode = filp->f_path.dentry->d_inode;
|
|
unsigned int flags;
|
|
int new_clusters;
|
|
int status;
|
|
struct ocfs2_space_resv sr;
|
|
struct ocfs2_new_group_input input;
|
|
struct reflink_arguments args;
|
|
const char *old_path, *new_path;
|
|
bool preserve;
|
|
struct ocfs2_info info;
|
|
|
|
switch (cmd) {
|
|
case OCFS2_IOC_GETFLAGS:
|
|
status = ocfs2_get_inode_attr(inode, &flags);
|
|
if (status < 0)
|
|
return status;
|
|
|
|
flags &= OCFS2_FL_VISIBLE;
|
|
return put_user(flags, (int __user *) arg);
|
|
case OCFS2_IOC_SETFLAGS:
|
|
if (get_user(flags, (int __user *) arg))
|
|
return -EFAULT;
|
|
|
|
status = mnt_want_write(filp->f_path.mnt);
|
|
if (status)
|
|
return status;
|
|
status = ocfs2_set_inode_attr(inode, flags,
|
|
OCFS2_FL_MODIFIABLE);
|
|
mnt_drop_write(filp->f_path.mnt);
|
|
return status;
|
|
case OCFS2_IOC_RESVSP:
|
|
case OCFS2_IOC_RESVSP64:
|
|
case OCFS2_IOC_UNRESVSP:
|
|
case OCFS2_IOC_UNRESVSP64:
|
|
if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_change_file_space(filp, cmd, &sr);
|
|
case OCFS2_IOC_GROUP_EXTEND:
|
|
if (!capable(CAP_SYS_RESOURCE))
|
|
return -EPERM;
|
|
|
|
if (get_user(new_clusters, (int __user *)arg))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_group_extend(inode, new_clusters);
|
|
case OCFS2_IOC_GROUP_ADD:
|
|
case OCFS2_IOC_GROUP_ADD64:
|
|
if (!capable(CAP_SYS_RESOURCE))
|
|
return -EPERM;
|
|
|
|
if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_group_add(inode, &input);
|
|
case OCFS2_IOC_REFLINK:
|
|
if (copy_from_user(&args, (struct reflink_arguments *)arg,
|
|
sizeof(args)))
|
|
return -EFAULT;
|
|
old_path = (const char *)(unsigned long)args.old_path;
|
|
new_path = (const char *)(unsigned long)args.new_path;
|
|
preserve = (args.preserve != 0);
|
|
|
|
return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
|
|
case OCFS2_IOC_INFO:
|
|
if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
|
|
sizeof(struct ocfs2_info)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_info_handle(inode, &info, 0);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
|
|
{
|
|
bool preserve;
|
|
struct reflink_arguments args;
|
|
struct inode *inode = file->f_path.dentry->d_inode;
|
|
struct ocfs2_info info;
|
|
|
|
switch (cmd) {
|
|
case OCFS2_IOC32_GETFLAGS:
|
|
cmd = OCFS2_IOC_GETFLAGS;
|
|
break;
|
|
case OCFS2_IOC32_SETFLAGS:
|
|
cmd = OCFS2_IOC_SETFLAGS;
|
|
break;
|
|
case OCFS2_IOC_RESVSP:
|
|
case OCFS2_IOC_RESVSP64:
|
|
case OCFS2_IOC_UNRESVSP:
|
|
case OCFS2_IOC_UNRESVSP64:
|
|
case OCFS2_IOC_GROUP_EXTEND:
|
|
case OCFS2_IOC_GROUP_ADD:
|
|
case OCFS2_IOC_GROUP_ADD64:
|
|
break;
|
|
case OCFS2_IOC_REFLINK:
|
|
if (copy_from_user(&args, (struct reflink_arguments *)arg,
|
|
sizeof(args)))
|
|
return -EFAULT;
|
|
preserve = (args.preserve != 0);
|
|
|
|
return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
|
|
compat_ptr(args.new_path), preserve);
|
|
case OCFS2_IOC_INFO:
|
|
if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
|
|
sizeof(struct ocfs2_info)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_info_handle(inode, &info, 1);
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
return ocfs2_ioctl(file, cmd, arg);
|
|
}
|
|
#endif
|