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![Linus Torvalds](/assets/img/avatar_default.png)
* 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jlbec/ocfs2: (39 commits) Treat writes as new when holes span across page boundaries fs,ocfs2: Move o2net_get_func_run_time under CONFIG_OCFS2_FS_STATS. ocfs2/dlm: Move kmalloc() outside the spinlock ocfs2: Make the left masklogs compat. ocfs2: Remove masklog ML_AIO. ocfs2: Remove masklog ML_UPTODATE. ocfs2: Remove masklog ML_BH_IO. ocfs2: Remove masklog ML_JOURNAL. ocfs2: Remove masklog ML_EXPORT. ocfs2: Remove masklog ML_DCACHE. ocfs2: Remove masklog ML_NAMEI. ocfs2: Remove mlog(0) from fs/ocfs2/dir.c ocfs2: remove NAMEI from symlink.c ocfs2: Remove masklog ML_QUOTA. ocfs2: Remove mlog(0) from quota_local.c. ocfs2: Remove masklog ML_RESERVATIONS. ocfs2: Remove masklog ML_XATTR. ocfs2: Remove masklog ML_SUPER. ocfs2: Remove mlog(0) from fs/ocfs2/heartbeat.c ocfs2: Remove mlog(0) from fs/ocfs2/slot_map.c ... Fix up trivial conflict in fs/ocfs2/super.c
593 lines
13 KiB
C
593 lines
13 KiB
C
/*
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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/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 <linux/ext2_fs.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 call is void because we are already reporting an error that may
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* be -EFAULT. The error will be returned from the ioctl(2) call. It's
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* just a best-effort to tell userspace that this request 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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#define o2info_set_request_error(a, b) \
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__o2info_set_request_error((struct ocfs2_info_request *)&(a), b)
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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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#define o2info_set_request_filled(a) \
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__o2info_set_request_filled((struct ocfs2_info_request *)&(a))
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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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#define o2info_clear_request_filled(a) \
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__o2info_clear_request_filled((struct ocfs2_info_request *)&(a))
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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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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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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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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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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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int status = -EFAULT;
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struct ocfs2_info_blocksize oib;
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if (o2info_from_user(oib, req))
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goto bail;
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oib.ib_blocksize = inode->i_sb->s_blocksize;
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o2info_set_request_filled(oib);
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if (o2info_to_user(oib, req))
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goto bail;
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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(oib, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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oic.ic_clustersize = osb->s_clustersize;
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o2info_set_request_filled(oic);
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if (o2info_to_user(oic, req))
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goto bail;
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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(oic, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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oim.im_max_slots = osb->max_slots;
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o2info_set_request_filled(oim);
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if (o2info_to_user(oim, req))
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goto bail;
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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(oim, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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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);
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if (o2info_to_user(oil, req))
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goto bail;
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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(oil, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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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);
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if (o2info_to_user(oiu, req))
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goto bail;
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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(oiu, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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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);
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if (o2info_to_user(oif, req))
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goto bail;
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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(oif, req);
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return status;
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}
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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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int status = -EFAULT;
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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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goto bail;
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oij.ij_journal_size = osb->journal->j_inode->i_size;
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o2info_set_request_filled(oij);
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if (o2info_to_user(oij, req))
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goto bail;
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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(oij, req);
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return status;
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}
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int ocfs2_info_handle_unknown(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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int status = -EFAULT;
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struct ocfs2_info_request oir;
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if (o2info_from_user(oir, req))
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goto bail;
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o2info_clear_request_filled(oir);
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if (o2info_to_user(oir, req))
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goto bail;
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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(oir, req);
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return status;
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}
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/*
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* Validate and distinguish OCFS2_IOC_INFO requests.
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*
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* - validate the magic number.
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* - distinguish different requests.
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* - validate size of different requests.
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*/
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int ocfs2_info_handle_request(struct inode *inode,
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struct ocfs2_info_request __user *req)
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{
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int status = -EFAULT;
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struct ocfs2_info_request oir;
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if (o2info_from_user(oir, req))
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goto bail;
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status = -EINVAL;
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if (oir.ir_magic != OCFS2_INFO_MAGIC)
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goto bail;
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switch (oir.ir_code) {
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case OCFS2_INFO_BLOCKSIZE:
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if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
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status = ocfs2_info_handle_blocksize(inode, req);
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break;
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case OCFS2_INFO_CLUSTERSIZE:
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if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
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status = ocfs2_info_handle_clustersize(inode, req);
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break;
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case OCFS2_INFO_MAXSLOTS:
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if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
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status = ocfs2_info_handle_maxslots(inode, req);
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break;
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case OCFS2_INFO_LABEL:
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if (oir.ir_size == sizeof(struct ocfs2_info_label))
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status = ocfs2_info_handle_label(inode, req);
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break;
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case OCFS2_INFO_UUID:
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if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
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status = ocfs2_info_handle_uuid(inode, req);
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break;
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case OCFS2_INFO_FS_FEATURES:
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if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
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status = ocfs2_info_handle_fs_features(inode, req);
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break;
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case OCFS2_INFO_JOURNAL_SIZE:
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if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
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status = ocfs2_info_handle_journal_size(inode, req);
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break;
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default:
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status = ocfs2_info_handle_unknown(inode, req);
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break;
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}
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bail:
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return status;
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}
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int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
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u64 *req_addr, int compat_flag)
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{
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int status = -EFAULT;
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u64 __user *bp = NULL;
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if (compat_flag) {
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#ifdef CONFIG_COMPAT
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/*
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* pointer bp stores the base address of a pointers array,
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* which collects all addresses of separate request.
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*/
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bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
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#else
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BUG();
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#endif
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} else
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bp = (u64 __user *)(unsigned long)(info->oi_requests);
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if (o2info_from_user(*req_addr, bp + idx))
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goto bail;
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status = 0;
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bail:
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return status;
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}
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/*
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* OCFS2_IOC_INFO handles an array of requests passed from userspace.
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*
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* ocfs2_info_handle() recevies a large info aggregation, grab and
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* validate the request count from header, then break it into small
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* pieces, later specific handlers can handle them one by one.
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*
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* Idea here is to make each separate request small enough to ensure
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* a better backward&forward compatibility, since a small piece of
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* request will be less likely to be broken if disk layout get changed.
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*/
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int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
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int compat_flag)
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{
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int i, status = 0;
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u64 req_addr;
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struct ocfs2_info_request __user *reqp;
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if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
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(!info->oi_requests)) {
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status = -EINVAL;
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goto bail;
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}
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for (i = 0; i < info->oi_count; i++) {
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status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
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if (status)
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break;
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reqp = (struct ocfs2_info_request *)(unsigned long)req_addr;
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if (!reqp) {
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status = -EINVAL;
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goto bail;
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}
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status = ocfs2_info_handle_request(inode, reqp);
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if (status)
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break;
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}
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bail:
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return status;
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}
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long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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{
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struct inode *inode = filp->f_path.dentry->d_inode;
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unsigned int flags;
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int new_clusters;
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int status;
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struct ocfs2_space_resv sr;
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struct ocfs2_new_group_input input;
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struct reflink_arguments args;
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const char *old_path, *new_path;
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bool preserve;
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struct ocfs2_info info;
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switch (cmd) {
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case OCFS2_IOC_GETFLAGS:
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status = ocfs2_get_inode_attr(inode, &flags);
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if (status < 0)
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return status;
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flags &= OCFS2_FL_VISIBLE;
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return put_user(flags, (int __user *) arg);
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case OCFS2_IOC_SETFLAGS:
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if (get_user(flags, (int __user *) arg))
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return -EFAULT;
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status = mnt_want_write(filp->f_path.mnt);
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if (status)
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return status;
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status = ocfs2_set_inode_attr(inode, flags,
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OCFS2_FL_MODIFIABLE);
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mnt_drop_write(filp->f_path.mnt);
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return status;
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case OCFS2_IOC_RESVSP:
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case OCFS2_IOC_RESVSP64:
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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
|