1006 lines
23 KiB
C
Executable File
1006 lines
23 KiB
C
Executable File
/*
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* linux/fs/ocfs2/ioctl.c
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*
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* Copyright (C) 2006 Herbert Poetzl
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* adapted from Remy Card's ext2/ioctl.c
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*/
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#include <linux/fs.h>
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#include <linux/mount.h>
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#include <linux/blkdev.h>
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#include <linux/compat.h>
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#include <cluster/masklog.h>
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#include "ocfs2.h"
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#include "alloc.h"
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#include "dlmglue.h"
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#include "file.h"
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#include "inode.h"
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#include "journal.h"
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#include "ocfs2_fs.h"
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#include "ioctl.h"
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#include "resize.h"
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#include "refcounttree.h"
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#include "sysfile.h"
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#include "dir.h"
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#include "buffer_head_io.h"
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#include "suballoc.h"
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#include "move_extents.h"
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#define o2info_from_user(a, b) \
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copy_from_user(&(a), (b), sizeof(a))
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#define o2info_to_user(a, b) \
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copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
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/*
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* This is just a best-effort to tell userspace that this request
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* caused the error.
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*/
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static inline void o2info_set_request_error(struct ocfs2_info_request *kreq,
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struct ocfs2_info_request __user *req)
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{
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kreq->ir_flags |= OCFS2_INFO_FL_ERROR;
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(void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags));
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}
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static inline void o2info_set_request_filled(struct ocfs2_info_request *req)
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{
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req->ir_flags |= OCFS2_INFO_FL_FILLED;
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}
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static inline void o2info_clear_request_filled(struct ocfs2_info_request *req)
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{
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req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
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}
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static inline int o2info_coherent(struct ocfs2_info_request *req)
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{
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return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT));
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}
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static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
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{
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int status;
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status = ocfs2_inode_lock(inode, NULL, 0);
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if (status < 0) {
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mlog_errno(status);
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return status;
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}
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ocfs2_get_inode_flags(OCFS2_I(inode));
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*flags = OCFS2_I(inode)->ip_attr;
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ocfs2_inode_unlock(inode, 0);
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return status;
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}
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static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
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unsigned mask)
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{
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struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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handle_t *handle = NULL;
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struct buffer_head *bh = NULL;
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unsigned oldflags;
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int status;
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mutex_lock(&inode->i_mutex);
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status = ocfs2_inode_lock(inode, &bh, 1);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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status = -EACCES;
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if (!inode_owner_or_capable(inode))
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goto bail_unlock;
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if (!S_ISDIR(inode->i_mode))
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flags &= ~OCFS2_DIRSYNC_FL;
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oldflags = ocfs2_inode->ip_attr;
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flags = flags & mask;
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flags |= oldflags & ~mask;
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/*
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* The IMMUTABLE and APPEND_ONLY flags can only be changed by
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* the relevant capability.
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*/
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status = -EPERM;
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if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
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(OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
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if (!capable(CAP_LINUX_IMMUTABLE))
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goto bail_unlock;
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}
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handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
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if (IS_ERR(handle)) {
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status = PTR_ERR(handle);
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mlog_errno(status);
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goto bail_unlock;
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}
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ocfs2_inode->ip_attr = flags;
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ocfs2_set_inode_flags(inode);
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status = ocfs2_mark_inode_dirty(handle, inode, bh);
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if (status < 0)
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mlog_errno(status);
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ocfs2_commit_trans(osb, handle);
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bail_unlock:
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ocfs2_inode_unlock(inode, 1);
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bail:
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mutex_unlock(&inode->i_mutex);
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brelse(bh);
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return status;
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}
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static int ocfs2_info_handle_blocksize(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_blocksize oib;
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if (o2info_from_user(oib, req))
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return -EFAULT;
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oib.ib_blocksize = inode->i_sb->s_blocksize;
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o2info_set_request_filled(&oib.ib_req);
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if (o2info_to_user(oib, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_clustersize(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_clustersize oic;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oic, req))
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return -EFAULT;
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oic.ic_clustersize = osb->s_clustersize;
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o2info_set_request_filled(&oic.ic_req);
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if (o2info_to_user(oic, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_maxslots(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_maxslots oim;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oim, req))
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return -EFAULT;
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oim.im_max_slots = osb->max_slots;
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o2info_set_request_filled(&oim.im_req);
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if (o2info_to_user(oim, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_label(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_label oil;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oil, req))
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return -EFAULT;
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memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN);
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o2info_set_request_filled(&oil.il_req);
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if (o2info_to_user(oil, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_uuid(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_uuid oiu;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oiu, req))
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return -EFAULT;
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memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1);
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o2info_set_request_filled(&oiu.iu_req);
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if (o2info_to_user(oiu, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_fs_features(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_fs_features oif;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oif, req))
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return -EFAULT;
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oif.if_compat_features = osb->s_feature_compat;
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oif.if_incompat_features = osb->s_feature_incompat;
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oif.if_ro_compat_features = osb->s_feature_ro_compat;
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o2info_set_request_filled(&oif.if_req);
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if (o2info_to_user(oif, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_handle_journal_size(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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struct ocfs2_info_journal_size oij;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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if (o2info_from_user(oij, req))
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return -EFAULT;
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oij.ij_journal_size = i_size_read(osb->journal->j_inode);
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o2info_set_request_filled(&oij.ij_req);
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if (o2info_to_user(oij, req))
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return -EFAULT;
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return 0;
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}
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static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb,
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struct inode *inode_alloc, u64 blkno,
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struct ocfs2_info_freeinode *fi,
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u32 slot)
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{
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int status = 0, unlock = 0;
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struct buffer_head *bh = NULL;
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struct ocfs2_dinode *dinode_alloc = NULL;
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if (inode_alloc)
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mutex_lock(&inode_alloc->i_mutex);
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if (o2info_coherent(&fi->ifi_req)) {
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status = ocfs2_inode_lock(inode_alloc, &bh, 0);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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unlock = 1;
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} else {
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status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
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if (status < 0) {
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mlog_errno(status);
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goto bail;
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}
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}
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dinode_alloc = (struct ocfs2_dinode *)bh->b_data;
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fi->ifi_stat[slot].lfi_total =
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le32_to_cpu(dinode_alloc->id1.bitmap1.i_total);
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fi->ifi_stat[slot].lfi_free =
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le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) -
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le32_to_cpu(dinode_alloc->id1.bitmap1.i_used);
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bail:
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if (unlock)
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ocfs2_inode_unlock(inode_alloc, 0);
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if (inode_alloc)
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mutex_unlock(&inode_alloc->i_mutex);
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brelse(bh);
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return status;
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}
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static int ocfs2_info_handle_freeinode(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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u32 i;
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u64 blkno = -1;
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char namebuf[40];
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int status, type = INODE_ALLOC_SYSTEM_INODE;
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struct ocfs2_info_freeinode *oifi = NULL;
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struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
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struct inode *inode_alloc = NULL;
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oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL);
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if (!oifi) {
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status = -ENOMEM;
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mlog_errno(status);
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goto out_err;
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}
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if (o2info_from_user(*oifi, req)) {
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status = -EFAULT;
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goto out_free;
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}
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oifi->ifi_slotnum = osb->max_slots;
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for (i = 0; i < oifi->ifi_slotnum; i++) {
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if (o2info_coherent(&oifi->ifi_req)) {
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inode_alloc = ocfs2_get_system_file_inode(osb, type, i);
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if (!inode_alloc) {
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mlog(ML_ERROR, "unable to get alloc inode in "
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"slot %u\n", i);
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status = -EIO;
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goto bail;
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}
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} else {
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ocfs2_sprintf_system_inode_name(namebuf,
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sizeof(namebuf),
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type, i);
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status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
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namebuf,
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strlen(namebuf),
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&blkno);
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if (status < 0) {
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status = -ENOENT;
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goto bail;
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}
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}
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status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i);
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iput(inode_alloc);
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inode_alloc = NULL;
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if (status < 0)
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goto bail;
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}
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o2info_set_request_filled(&oifi->ifi_req);
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if (o2info_to_user(*oifi, req)) {
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status = -EFAULT;
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goto out_free;
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}
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status = 0;
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bail:
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if (status)
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o2info_set_request_error(&oifi->ifi_req, req);
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out_free:
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kfree(oifi);
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out_err:
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return status;
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}
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static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist,
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unsigned int chunksize)
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{
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int index;
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index = __ilog2_u32(chunksize);
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if (index >= OCFS2_INFO_MAX_HIST)
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index = OCFS2_INFO_MAX_HIST - 1;
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hist->fc_chunks[index]++;
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hist->fc_clusters[index] += chunksize;
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}
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static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats,
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unsigned int chunksize)
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{
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if (chunksize > stats->ffs_max)
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stats->ffs_max = chunksize;
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if (chunksize < stats->ffs_min)
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stats->ffs_min = chunksize;
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stats->ffs_avg += chunksize;
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stats->ffs_free_chunks_real++;
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}
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static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg,
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unsigned int chunksize)
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{
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o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize);
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o2ffg_update_stats(&(ffg->iff_ffs), chunksize);
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}
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static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb,
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struct inode *gb_inode,
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struct ocfs2_dinode *gb_dinode,
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struct ocfs2_chain_rec *rec,
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struct ocfs2_info_freefrag *ffg,
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u32 chunks_in_group)
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{
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int status = 0, used;
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u64 blkno;
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struct buffer_head *bh = NULL;
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struct ocfs2_group_desc *bg = NULL;
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unsigned int max_bits, num_clusters;
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unsigned int offset = 0, cluster, chunk;
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unsigned int chunk_free, last_chunksize = 0;
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if (!le32_to_cpu(rec->c_free))
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goto bail;
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do {
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if (!bg)
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blkno = le64_to_cpu(rec->c_blkno);
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else
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blkno = le64_to_cpu(bg->bg_next_group);
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if (bh) {
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brelse(bh);
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bh = NULL;
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}
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if (o2info_coherent(&ffg->iff_req))
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status = ocfs2_read_group_descriptor(gb_inode,
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gb_dinode,
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blkno, &bh);
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else
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status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
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if (status < 0) {
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mlog(ML_ERROR, "Can't read the group descriptor # "
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"%llu from device.", (unsigned long long)blkno);
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status = -EIO;
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goto bail;
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}
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bg = (struct ocfs2_group_desc *)bh->b_data;
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if (!le16_to_cpu(bg->bg_free_bits_count))
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continue;
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max_bits = le16_to_cpu(bg->bg_bits);
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offset = 0;
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for (chunk = 0; chunk < chunks_in_group; chunk++) {
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/*
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* last chunk may be not an entire one.
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*/
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if ((offset + ffg->iff_chunksize) > max_bits)
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num_clusters = max_bits - offset;
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else
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num_clusters = ffg->iff_chunksize;
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chunk_free = 0;
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for (cluster = 0; cluster < num_clusters; cluster++) {
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used = ocfs2_test_bit(offset,
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(unsigned long *)bg->bg_bitmap);
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/*
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* - chunk_free counts free clusters in #N chunk.
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* - last_chunksize records the size(in) clusters
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* for the last real free chunk being counted.
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*/
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if (!used) {
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last_chunksize++;
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chunk_free++;
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}
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if (used && last_chunksize) {
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ocfs2_info_update_ffg(ffg,
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last_chunksize);
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last_chunksize = 0;
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}
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offset++;
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}
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if (chunk_free == ffg->iff_chunksize)
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ffg->iff_ffs.ffs_free_chunks++;
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}
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/*
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* need to update the info for last free chunk.
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*/
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if (last_chunksize)
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ocfs2_info_update_ffg(ffg, last_chunksize);
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} while (le64_to_cpu(bg->bg_next_group));
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bail:
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brelse(bh);
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return status;
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}
|
|
|
|
static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb,
|
|
struct inode *gb_inode, u64 blkno,
|
|
struct ocfs2_info_freefrag *ffg)
|
|
{
|
|
u32 chunks_in_group;
|
|
int status = 0, unlock = 0, i;
|
|
|
|
struct buffer_head *bh = NULL;
|
|
struct ocfs2_chain_list *cl = NULL;
|
|
struct ocfs2_chain_rec *rec = NULL;
|
|
struct ocfs2_dinode *gb_dinode = NULL;
|
|
|
|
if (gb_inode)
|
|
mutex_lock(&gb_inode->i_mutex);
|
|
|
|
if (o2info_coherent(&ffg->iff_req)) {
|
|
status = ocfs2_inode_lock(gb_inode, &bh, 0);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
unlock = 1;
|
|
} else {
|
|
status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
|
|
if (status < 0) {
|
|
mlog_errno(status);
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
gb_dinode = (struct ocfs2_dinode *)bh->b_data;
|
|
cl = &(gb_dinode->id2.i_chain);
|
|
|
|
/*
|
|
* Chunksize(in) clusters from userspace should be
|
|
* less than clusters in a group.
|
|
*/
|
|
if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) {
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats));
|
|
|
|
ffg->iff_ffs.ffs_min = ~0U;
|
|
ffg->iff_ffs.ffs_clusters =
|
|
le32_to_cpu(gb_dinode->id1.bitmap1.i_total);
|
|
ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters -
|
|
le32_to_cpu(gb_dinode->id1.bitmap1.i_used);
|
|
|
|
chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1;
|
|
|
|
for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) {
|
|
rec = &(cl->cl_recs[i]);
|
|
status = ocfs2_info_freefrag_scan_chain(osb, gb_inode,
|
|
gb_dinode,
|
|
rec, ffg,
|
|
chunks_in_group);
|
|
if (status)
|
|
goto bail;
|
|
}
|
|
|
|
if (ffg->iff_ffs.ffs_free_chunks_real)
|
|
ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg /
|
|
ffg->iff_ffs.ffs_free_chunks_real);
|
|
bail:
|
|
if (unlock)
|
|
ocfs2_inode_unlock(gb_inode, 0);
|
|
|
|
if (gb_inode)
|
|
mutex_unlock(&gb_inode->i_mutex);
|
|
|
|
if (gb_inode)
|
|
iput(gb_inode);
|
|
|
|
brelse(bh);
|
|
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_info_handle_freefrag(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
u64 blkno = -1;
|
|
char namebuf[40];
|
|
int status, type = GLOBAL_BITMAP_SYSTEM_INODE;
|
|
|
|
struct ocfs2_info_freefrag *oiff;
|
|
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
|
|
struct inode *gb_inode = NULL;
|
|
|
|
oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL);
|
|
if (!oiff) {
|
|
status = -ENOMEM;
|
|
mlog_errno(status);
|
|
goto out_err;
|
|
}
|
|
|
|
if (o2info_from_user(*oiff, req)) {
|
|
status = -EFAULT;
|
|
goto out_free;
|
|
}
|
|
/*
|
|
* chunksize from userspace should be power of 2.
|
|
*/
|
|
if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) ||
|
|
(!oiff->iff_chunksize)) {
|
|
status = -EINVAL;
|
|
goto bail;
|
|
}
|
|
|
|
if (o2info_coherent(&oiff->iff_req)) {
|
|
gb_inode = ocfs2_get_system_file_inode(osb, type,
|
|
OCFS2_INVALID_SLOT);
|
|
if (!gb_inode) {
|
|
mlog(ML_ERROR, "unable to get global_bitmap inode\n");
|
|
status = -EIO;
|
|
goto bail;
|
|
}
|
|
} else {
|
|
ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type,
|
|
OCFS2_INVALID_SLOT);
|
|
status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
|
|
namebuf,
|
|
strlen(namebuf),
|
|
&blkno);
|
|
if (status < 0) {
|
|
status = -ENOENT;
|
|
goto bail;
|
|
}
|
|
}
|
|
|
|
status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff);
|
|
if (status < 0)
|
|
goto bail;
|
|
|
|
o2info_set_request_filled(&oiff->iff_req);
|
|
|
|
if (o2info_to_user(*oiff, req)) {
|
|
status = -EFAULT;
|
|
goto out_free;
|
|
}
|
|
|
|
status = 0;
|
|
bail:
|
|
if (status)
|
|
o2info_set_request_error(&oiff->iff_req, req);
|
|
out_free:
|
|
kfree(oiff);
|
|
out_err:
|
|
return status;
|
|
}
|
|
|
|
static int ocfs2_info_handle_unknown(struct inode *inode,
|
|
struct ocfs2_info_request __user *req)
|
|
{
|
|
struct ocfs2_info_request oir;
|
|
|
|
if (o2info_from_user(oir, req))
|
|
return -EFAULT;
|
|
|
|
o2info_clear_request_filled(&oir);
|
|
|
|
if (o2info_to_user(oir, req))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Validate and distinguish OCFS2_IOC_INFO requests.
|
|
*
|
|
* - validate the magic number.
|
|
* - distinguish different requests.
|
|
* - validate size of different requests.
|
|
*/
|
|
static 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;
|
|
case OCFS2_INFO_FREEINODE:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
|
|
status = ocfs2_info_handle_freeinode(inode, req);
|
|
break;
|
|
case OCFS2_INFO_FREEFRAG:
|
|
if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
|
|
status = ocfs2_info_handle_freefrag(inode, req);
|
|
break;
|
|
default:
|
|
status = ocfs2_info_handle_unknown(inode, req);
|
|
break;
|
|
}
|
|
|
|
bail:
|
|
return status;
|
|
}
|
|
|
|
static 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.
|
|
*/
|
|
static 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 __user *)(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 = file_inode(filp);
|
|
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 __user *old_path;
|
|
const char __user *new_path;
|
|
bool preserve;
|
|
struct ocfs2_info info;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
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_file(filp);
|
|
if (status)
|
|
return status;
|
|
status = ocfs2_set_inode_attr(inode, flags,
|
|
OCFS2_FL_MODIFIABLE);
|
|
mnt_drop_write_file(filp);
|
|
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;
|
|
|
|
status = mnt_want_write_file(filp);
|
|
if (status)
|
|
return status;
|
|
status = ocfs2_group_extend(inode, new_clusters);
|
|
mnt_drop_write_file(filp);
|
|
return status;
|
|
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;
|
|
|
|
status = mnt_want_write_file(filp);
|
|
if (status)
|
|
return status;
|
|
status = ocfs2_group_add(inode, &input);
|
|
mnt_drop_write_file(filp);
|
|
return status;
|
|
case OCFS2_IOC_REFLINK:
|
|
if (copy_from_user(&args, argp, sizeof(args)))
|
|
return -EFAULT;
|
|
old_path = (const char __user *)(unsigned long)args.old_path;
|
|
new_path = (const char __user *)(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, argp, sizeof(struct ocfs2_info)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_info_handle(inode, &info, 0);
|
|
case FITRIM:
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct request_queue *q = bdev_get_queue(sb->s_bdev);
|
|
struct fstrim_range range;
|
|
int ret = 0;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!blk_queue_discard(q))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (copy_from_user(&range, argp, sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
range.minlen = max_t(u64, q->limits.discard_granularity,
|
|
range.minlen);
|
|
ret = ocfs2_trim_fs(sb, &range);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (copy_to_user(argp, &range, sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
case OCFS2_IOC_MOVE_EXT:
|
|
return ocfs2_ioctl_move_extents(filp, argp);
|
|
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_inode(file);
|
|
struct ocfs2_info info;
|
|
void __user *argp = (void __user *)arg;
|
|
|
|
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:
|
|
case FITRIM:
|
|
break;
|
|
case OCFS2_IOC_REFLINK:
|
|
if (copy_from_user(&args, argp, 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, argp, sizeof(struct ocfs2_info)))
|
|
return -EFAULT;
|
|
|
|
return ocfs2_info_handle(inode, &info, 1);
|
|
case OCFS2_IOC_MOVE_EXT:
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
|
|
return ocfs2_ioctl(file, cmd, arg);
|
|
}
|
|
#endif
|