| /* |
| * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| * All Rights Reserved. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation. |
| * |
| * This program is distributed in the hope that it would be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| #include "xfs.h" |
| #include "xfs_fs.h" |
| #include "xfs_bit.h" |
| #include "xfs_log.h" |
| #include "xfs_inum.h" |
| #include "xfs_trans.h" |
| #include "xfs_sb.h" |
| #include "xfs_ag.h" |
| #include "xfs_dir2.h" |
| #include "xfs_alloc.h" |
| #include "xfs_dmapi.h" |
| #include "xfs_mount.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_alloc_btree.h" |
| #include "xfs_ialloc_btree.h" |
| #include "xfs_attr_sf.h" |
| #include "xfs_dir2_sf.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_btree.h" |
| #include "xfs_ialloc.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_itable.h" |
| #include "xfs_error.h" |
| #include "xfs_rw.h" |
| #include "xfs_acl.h" |
| #include "xfs_attr.h" |
| #include "xfs_bmap.h" |
| #include "xfs_buf_item.h" |
| #include "xfs_utils.h" |
| #include "xfs_dfrag.h" |
| #include "xfs_fsops.h" |
| #include "xfs_vnodeops.h" |
| |
| #include <linux/capability.h> |
| #include <linux/dcache.h> |
| #include <linux/mount.h> |
| #include <linux/namei.h> |
| #include <linux/pagemap.h> |
| |
| /* |
| * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| * a file or fs handle. |
| * |
| * XFS_IOC_PATH_TO_FSHANDLE |
| * returns fs handle for a mount point or path within that mount point |
| * XFS_IOC_FD_TO_HANDLE |
| * returns full handle for a FD opened in user space |
| * XFS_IOC_PATH_TO_HANDLE |
| * returns full handle for a path |
| */ |
| STATIC int |
| xfs_find_handle( |
| unsigned int cmd, |
| void __user *arg) |
| { |
| int hsize; |
| xfs_handle_t handle; |
| xfs_fsop_handlereq_t hreq; |
| struct inode *inode; |
| |
| if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| return -XFS_ERROR(EFAULT); |
| |
| memset((char *)&handle, 0, sizeof(handle)); |
| |
| switch (cmd) { |
| case XFS_IOC_PATH_TO_FSHANDLE: |
| case XFS_IOC_PATH_TO_HANDLE: { |
| struct nameidata nd; |
| int error; |
| |
| error = user_path_walk_link((const char __user *)hreq.path, &nd); |
| if (error) |
| return error; |
| |
| ASSERT(nd.path.dentry); |
| ASSERT(nd.path.dentry->d_inode); |
| inode = igrab(nd.path.dentry->d_inode); |
| path_put(&nd.path); |
| break; |
| } |
| |
| case XFS_IOC_FD_TO_HANDLE: { |
| struct file *file; |
| |
| file = fget(hreq.fd); |
| if (!file) |
| return -EBADF; |
| |
| ASSERT(file->f_path.dentry); |
| ASSERT(file->f_path.dentry->d_inode); |
| inode = igrab(file->f_path.dentry->d_inode); |
| fput(file); |
| break; |
| } |
| |
| default: |
| ASSERT(0); |
| return -XFS_ERROR(EINVAL); |
| } |
| |
| if (inode->i_sb->s_magic != XFS_SB_MAGIC) { |
| /* we're not in XFS anymore, Toto */ |
| iput(inode); |
| return -XFS_ERROR(EINVAL); |
| } |
| |
| switch (inode->i_mode & S_IFMT) { |
| case S_IFREG: |
| case S_IFDIR: |
| case S_IFLNK: |
| break; |
| default: |
| iput(inode); |
| return -XFS_ERROR(EBADF); |
| } |
| |
| /* now we can grab the fsid */ |
| memcpy(&handle.ha_fsid, XFS_I(inode)->i_mount->m_fixedfsid, |
| sizeof(xfs_fsid_t)); |
| hsize = sizeof(xfs_fsid_t); |
| |
| if (cmd != XFS_IOC_PATH_TO_FSHANDLE) { |
| xfs_inode_t *ip = XFS_I(inode); |
| int lock_mode; |
| |
| /* need to get access to the xfs_inode to read the generation */ |
| lock_mode = xfs_ilock_map_shared(ip); |
| |
| /* fill in fid section of handle from inode */ |
| handle.ha_fid.fid_len = sizeof(xfs_fid_t) - |
| sizeof(handle.ha_fid.fid_len); |
| handle.ha_fid.fid_pad = 0; |
| handle.ha_fid.fid_gen = ip->i_d.di_gen; |
| handle.ha_fid.fid_ino = ip->i_ino; |
| |
| xfs_iunlock_map_shared(ip, lock_mode); |
| |
| hsize = XFS_HSIZE(handle); |
| } |
| |
| /* now copy our handle into the user buffer & write out the size */ |
| if (copy_to_user(hreq.ohandle, &handle, hsize) || |
| copy_to_user(hreq.ohandlen, &hsize, sizeof(__s32))) { |
| iput(inode); |
| return -XFS_ERROR(EFAULT); |
| } |
| |
| iput(inode); |
| return 0; |
| } |
| |
| |
| /* |
| * Convert userspace handle data into inode. |
| * |
| * We use the fact that all the fsop_handlereq ioctl calls have a data |
| * structure argument whose first component is always a xfs_fsop_handlereq_t, |
| * so we can pass that sub structure into this handy, shared routine. |
| * |
| * If no error, caller must always iput the returned inode. |
| */ |
| STATIC int |
| xfs_vget_fsop_handlereq( |
| xfs_mount_t *mp, |
| struct inode *parinode, /* parent inode pointer */ |
| xfs_fsop_handlereq_t *hreq, |
| struct inode **inode) |
| { |
| void __user *hanp; |
| size_t hlen; |
| xfs_fid_t *xfid; |
| xfs_handle_t *handlep; |
| xfs_handle_t handle; |
| xfs_inode_t *ip; |
| xfs_ino_t ino; |
| __u32 igen; |
| int error; |
| |
| /* |
| * Only allow handle opens under a directory. |
| */ |
| if (!S_ISDIR(parinode->i_mode)) |
| return XFS_ERROR(ENOTDIR); |
| |
| hanp = hreq->ihandle; |
| hlen = hreq->ihandlen; |
| handlep = &handle; |
| |
| if (hlen < sizeof(handlep->ha_fsid) || hlen > sizeof(*handlep)) |
| return XFS_ERROR(EINVAL); |
| if (copy_from_user(handlep, hanp, hlen)) |
| return XFS_ERROR(EFAULT); |
| if (hlen < sizeof(*handlep)) |
| memset(((char *)handlep) + hlen, 0, sizeof(*handlep) - hlen); |
| if (hlen > sizeof(handlep->ha_fsid)) { |
| if (handlep->ha_fid.fid_len != |
| (hlen - sizeof(handlep->ha_fsid) - |
| sizeof(handlep->ha_fid.fid_len)) || |
| handlep->ha_fid.fid_pad) |
| return XFS_ERROR(EINVAL); |
| } |
| |
| /* |
| * Crack the handle, obtain the inode # & generation # |
| */ |
| xfid = (struct xfs_fid *)&handlep->ha_fid; |
| if (xfid->fid_len == sizeof(*xfid) - sizeof(xfid->fid_len)) { |
| ino = xfid->fid_ino; |
| igen = xfid->fid_gen; |
| } else { |
| return XFS_ERROR(EINVAL); |
| } |
| |
| /* |
| * Get the XFS inode, building a Linux inode to go with it. |
| */ |
| error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); |
| if (error) |
| return error; |
| if (ip == NULL) |
| return XFS_ERROR(EIO); |
| if (ip->i_d.di_gen != igen) { |
| xfs_iput_new(ip, XFS_ILOCK_SHARED); |
| return XFS_ERROR(ENOENT); |
| } |
| |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| |
| *inode = XFS_ITOV(ip); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_open_by_handle( |
| xfs_mount_t *mp, |
| void __user *arg, |
| struct file *parfilp, |
| struct inode *parinode) |
| { |
| int error; |
| int new_fd; |
| int permflag; |
| struct file *filp; |
| struct inode *inode; |
| struct dentry *dentry; |
| xfs_fsop_handlereq_t hreq; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode); |
| if (error) |
| return -error; |
| |
| /* Restrict xfs_open_by_handle to directories & regular files. */ |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| iput(inode); |
| return -XFS_ERROR(EINVAL); |
| } |
| |
| #if BITS_PER_LONG != 32 |
| hreq.oflags |= O_LARGEFILE; |
| #endif |
| /* Put open permission in namei format. */ |
| permflag = hreq.oflags; |
| if ((permflag+1) & O_ACCMODE) |
| permflag++; |
| if (permflag & O_TRUNC) |
| permflag |= 2; |
| |
| if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| (permflag & FMODE_WRITE) && IS_APPEND(inode)) { |
| iput(inode); |
| return -XFS_ERROR(EPERM); |
| } |
| |
| if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| iput(inode); |
| return -XFS_ERROR(EACCES); |
| } |
| |
| /* Can't write directories. */ |
| if ( S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { |
| iput(inode); |
| return -XFS_ERROR(EISDIR); |
| } |
| |
| if ((new_fd = get_unused_fd()) < 0) { |
| iput(inode); |
| return new_fd; |
| } |
| |
| dentry = d_alloc_anon(inode); |
| if (dentry == NULL) { |
| iput(inode); |
| put_unused_fd(new_fd); |
| return -XFS_ERROR(ENOMEM); |
| } |
| |
| /* Ensure umount returns EBUSY on umounts while this file is open. */ |
| mntget(parfilp->f_path.mnt); |
| |
| /* Create file pointer. */ |
| filp = dentry_open(dentry, parfilp->f_path.mnt, hreq.oflags); |
| if (IS_ERR(filp)) { |
| put_unused_fd(new_fd); |
| return -XFS_ERROR(-PTR_ERR(filp)); |
| } |
| if (inode->i_mode & S_IFREG) { |
| /* invisible operation should not change atime */ |
| filp->f_flags |= O_NOATIME; |
| filp->f_op = &xfs_invis_file_operations; |
| } |
| |
| fd_install(new_fd, filp); |
| return new_fd; |
| } |
| |
| /* |
| * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's |
| * unused first argument. |
| */ |
| STATIC int |
| do_readlink( |
| char __user *buffer, |
| int buflen, |
| const char *link) |
| { |
| int len; |
| |
| len = PTR_ERR(link); |
| if (IS_ERR(link)) |
| goto out; |
| |
| len = strlen(link); |
| if (len > (unsigned) buflen) |
| len = buflen; |
| if (copy_to_user(buffer, link, len)) |
| len = -EFAULT; |
| out: |
| return len; |
| } |
| |
| |
| STATIC int |
| xfs_readlink_by_handle( |
| xfs_mount_t *mp, |
| void __user *arg, |
| struct inode *parinode) |
| { |
| struct inode *inode; |
| xfs_fsop_handlereq_t hreq; |
| __u32 olen; |
| void *link; |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_vget_fsop_handlereq(mp, parinode, &hreq, &inode); |
| if (error) |
| return -error; |
| |
| /* Restrict this handle operation to symlinks only. */ |
| if (!S_ISLNK(inode->i_mode)) { |
| error = -XFS_ERROR(EINVAL); |
| goto out_iput; |
| } |
| |
| if (copy_from_user(&olen, hreq.ohandlen, sizeof(__u32))) { |
| error = -XFS_ERROR(EFAULT); |
| goto out_iput; |
| } |
| |
| link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
| if (!link) |
| goto out_iput; |
| |
| error = -xfs_readlink(XFS_I(inode), link); |
| if (error) |
| goto out_kfree; |
| error = do_readlink(hreq.ohandle, olen, link); |
| if (error) |
| goto out_kfree; |
| |
| out_kfree: |
| kfree(link); |
| out_iput: |
| iput(inode); |
| return error; |
| } |
| |
| STATIC int |
| xfs_fssetdm_by_handle( |
| xfs_mount_t *mp, |
| void __user *arg, |
| struct inode *parinode) |
| { |
| int error; |
| struct fsdmidata fsd; |
| xfs_fsop_setdm_handlereq_t dmhreq; |
| struct inode *inode; |
| |
| if (!capable(CAP_MKNOD)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_vget_fsop_handlereq(mp, parinode, &dmhreq.hreq, &inode); |
| if (error) |
| return -error; |
| |
| if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) { |
| error = -XFS_ERROR(EPERM); |
| goto out; |
| } |
| |
| if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| error = -XFS_ERROR(EFAULT); |
| goto out; |
| } |
| |
| error = -xfs_set_dmattrs(XFS_I(inode), fsd.fsd_dmevmask, |
| fsd.fsd_dmstate); |
| |
| out: |
| iput(inode); |
| return error; |
| } |
| |
| STATIC int |
| xfs_attrlist_by_handle( |
| xfs_mount_t *mp, |
| void __user *arg, |
| struct inode *parinode) |
| { |
| int error; |
| attrlist_cursor_kern_t *cursor; |
| xfs_fsop_attrlist_handlereq_t al_hreq; |
| struct inode *inode; |
| char *kbuf; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| if (al_hreq.buflen > XATTR_LIST_MAX) |
| return -XFS_ERROR(EINVAL); |
| |
| error = xfs_vget_fsop_handlereq(mp, parinode, &al_hreq.hreq, &inode); |
| if (error) |
| goto out; |
| |
| kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); |
| if (!kbuf) |
| goto out_vn_rele; |
| |
| cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| error = xfs_attr_list(XFS_I(inode), kbuf, al_hreq.buflen, |
| al_hreq.flags, cursor); |
| if (error) |
| goto out_kfree; |
| |
| if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| error = -EFAULT; |
| |
| out_kfree: |
| kfree(kbuf); |
| out_vn_rele: |
| iput(inode); |
| out: |
| return -error; |
| } |
| |
| STATIC int |
| xfs_attrmulti_attr_get( |
| struct inode *inode, |
| char *name, |
| char __user *ubuf, |
| __uint32_t *len, |
| __uint32_t flags) |
| { |
| char *kbuf; |
| int error = EFAULT; |
| |
| if (*len > XATTR_SIZE_MAX) |
| return EINVAL; |
| kbuf = kmalloc(*len, GFP_KERNEL); |
| if (!kbuf) |
| return ENOMEM; |
| |
| error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags, NULL); |
| if (error) |
| goto out_kfree; |
| |
| if (copy_to_user(ubuf, kbuf, *len)) |
| error = EFAULT; |
| |
| out_kfree: |
| kfree(kbuf); |
| return error; |
| } |
| |
| STATIC int |
| xfs_attrmulti_attr_set( |
| struct inode *inode, |
| char *name, |
| const char __user *ubuf, |
| __uint32_t len, |
| __uint32_t flags) |
| { |
| char *kbuf; |
| int error = EFAULT; |
| |
| if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| return EPERM; |
| if (len > XATTR_SIZE_MAX) |
| return EINVAL; |
| |
| kbuf = kmalloc(len, GFP_KERNEL); |
| if (!kbuf) |
| return ENOMEM; |
| |
| if (copy_from_user(kbuf, ubuf, len)) |
| goto out_kfree; |
| |
| error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
| |
| out_kfree: |
| kfree(kbuf); |
| return error; |
| } |
| |
| STATIC int |
| xfs_attrmulti_attr_remove( |
| struct inode *inode, |
| char *name, |
| __uint32_t flags) |
| { |
| if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| return EPERM; |
| return xfs_attr_remove(XFS_I(inode), name, flags); |
| } |
| |
| STATIC int |
| xfs_attrmulti_by_handle( |
| xfs_mount_t *mp, |
| void __user *arg, |
| struct file *parfilp, |
| struct inode *parinode) |
| { |
| int error; |
| xfs_attr_multiop_t *ops; |
| xfs_fsop_attrmulti_handlereq_t am_hreq; |
| struct inode *inode; |
| unsigned int i, size; |
| char *attr_name; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_vget_fsop_handlereq(mp, parinode, &am_hreq.hreq, &inode); |
| if (error) |
| goto out; |
| |
| error = E2BIG; |
| size = am_hreq.opcount * sizeof(attr_multiop_t); |
| if (!size || size > 16 * PAGE_SIZE) |
| goto out_vn_rele; |
| |
| error = ENOMEM; |
| ops = kmalloc(size, GFP_KERNEL); |
| if (!ops) |
| goto out_vn_rele; |
| |
| error = EFAULT; |
| if (copy_from_user(ops, am_hreq.ops, size)) |
| goto out_kfree_ops; |
| |
| attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); |
| if (!attr_name) |
| goto out_kfree_ops; |
| |
| |
| error = 0; |
| for (i = 0; i < am_hreq.opcount; i++) { |
| ops[i].am_error = strncpy_from_user(attr_name, |
| ops[i].am_attrname, MAXNAMELEN); |
| if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) |
| error = -ERANGE; |
| if (ops[i].am_error < 0) |
| break; |
| |
| switch (ops[i].am_opcode) { |
| case ATTR_OP_GET: |
| ops[i].am_error = xfs_attrmulti_attr_get(inode, |
| attr_name, ops[i].am_attrvalue, |
| &ops[i].am_length, ops[i].am_flags); |
| break; |
| case ATTR_OP_SET: |
| ops[i].am_error = mnt_want_write(parfilp->f_path.mnt); |
| if (ops[i].am_error) |
| break; |
| ops[i].am_error = xfs_attrmulti_attr_set(inode, |
| attr_name, ops[i].am_attrvalue, |
| ops[i].am_length, ops[i].am_flags); |
| mnt_drop_write(parfilp->f_path.mnt); |
| break; |
| case ATTR_OP_REMOVE: |
| ops[i].am_error = mnt_want_write(parfilp->f_path.mnt); |
| if (ops[i].am_error) |
| break; |
| ops[i].am_error = xfs_attrmulti_attr_remove(inode, |
| attr_name, ops[i].am_flags); |
| mnt_drop_write(parfilp->f_path.mnt); |
| break; |
| default: |
| ops[i].am_error = EINVAL; |
| } |
| } |
| |
| if (copy_to_user(am_hreq.ops, ops, size)) |
| error = XFS_ERROR(EFAULT); |
| |
| kfree(attr_name); |
| out_kfree_ops: |
| kfree(ops); |
| out_vn_rele: |
| iput(inode); |
| out: |
| return -error; |
| } |
| |
| STATIC int |
| xfs_ioc_space( |
| struct xfs_inode *ip, |
| struct inode *inode, |
| struct file *filp, |
| int ioflags, |
| unsigned int cmd, |
| void __user *arg) |
| { |
| xfs_flock64_t bf; |
| int attr_flags = 0; |
| int error; |
| |
| if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
| return -XFS_ERROR(EPERM); |
| |
| if (!(filp->f_mode & FMODE_WRITE)) |
| return -XFS_ERROR(EBADF); |
| |
| if (!S_ISREG(inode->i_mode)) |
| return -XFS_ERROR(EINVAL); |
| |
| if (copy_from_user(&bf, arg, sizeof(bf))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| attr_flags |= ATTR_NONBLOCK; |
| if (ioflags & IO_INVIS) |
| attr_flags |= ATTR_DMI; |
| |
| error = xfs_change_file_space(ip, cmd, &bf, filp->f_pos, |
| NULL, attr_flags); |
| return -error; |
| } |
| |
| STATIC int |
| xfs_ioc_bulkstat( |
| xfs_mount_t *mp, |
| unsigned int cmd, |
| void __user *arg) |
| { |
| xfs_fsop_bulkreq_t bulkreq; |
| int count; /* # of records returned */ |
| xfs_ino_t inlast; /* last inode number */ |
| int done; |
| int error; |
| |
| /* done = 1 if there are more stats to get and if bulkstat */ |
| /* should be called again (unused here, but used in dmapi) */ |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return -XFS_ERROR(EIO); |
| |
| if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| return -XFS_ERROR(EFAULT); |
| |
| if ((count = bulkreq.icount) <= 0) |
| return -XFS_ERROR(EINVAL); |
| |
| if (bulkreq.ubuffer == NULL) |
| return -XFS_ERROR(EINVAL); |
| |
| if (cmd == XFS_IOC_FSINUMBERS) |
| error = xfs_inumbers(mp, &inlast, &count, |
| bulkreq.ubuffer, xfs_inumbers_fmt); |
| else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| error = xfs_bulkstat_single(mp, &inlast, |
| bulkreq.ubuffer, &done); |
| else /* XFS_IOC_FSBULKSTAT */ |
| error = xfs_bulkstat(mp, &inlast, &count, |
| (bulkstat_one_pf)xfs_bulkstat_one, NULL, |
| sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| BULKSTAT_FG_QUICK, &done); |
| |
| if (error) |
| return -error; |
| |
| if (bulkreq.ocount != NULL) { |
| if (copy_to_user(bulkreq.lastip, &inlast, |
| sizeof(xfs_ino_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| return -XFS_ERROR(EFAULT); |
| } |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_fsgeometry_v1( |
| xfs_mount_t *mp, |
| void __user *arg) |
| { |
| xfs_fsop_geom_v1_t fsgeo; |
| int error; |
| |
| error = xfs_fs_geometry(mp, (xfs_fsop_geom_t *)&fsgeo, 3); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_fsgeometry( |
| xfs_mount_t *mp, |
| void __user *arg) |
| { |
| xfs_fsop_geom_t fsgeo; |
| int error; |
| |
| error = xfs_fs_geometry(mp, &fsgeo, 4); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| /* |
| * Linux extended inode flags interface. |
| */ |
| |
| STATIC unsigned int |
| xfs_merge_ioc_xflags( |
| unsigned int flags, |
| unsigned int start) |
| { |
| unsigned int xflags = start; |
| |
| if (flags & FS_IMMUTABLE_FL) |
| xflags |= XFS_XFLAG_IMMUTABLE; |
| else |
| xflags &= ~XFS_XFLAG_IMMUTABLE; |
| if (flags & FS_APPEND_FL) |
| xflags |= XFS_XFLAG_APPEND; |
| else |
| xflags &= ~XFS_XFLAG_APPEND; |
| if (flags & FS_SYNC_FL) |
| xflags |= XFS_XFLAG_SYNC; |
| else |
| xflags &= ~XFS_XFLAG_SYNC; |
| if (flags & FS_NOATIME_FL) |
| xflags |= XFS_XFLAG_NOATIME; |
| else |
| xflags &= ~XFS_XFLAG_NOATIME; |
| if (flags & FS_NODUMP_FL) |
| xflags |= XFS_XFLAG_NODUMP; |
| else |
| xflags &= ~XFS_XFLAG_NODUMP; |
| |
| return xflags; |
| } |
| |
| STATIC unsigned int |
| xfs_di2lxflags( |
| __uint16_t di_flags) |
| { |
| unsigned int flags = 0; |
| |
| if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| flags |= FS_IMMUTABLE_FL; |
| if (di_flags & XFS_DIFLAG_APPEND) |
| flags |= FS_APPEND_FL; |
| if (di_flags & XFS_DIFLAG_SYNC) |
| flags |= FS_SYNC_FL; |
| if (di_flags & XFS_DIFLAG_NOATIME) |
| flags |= FS_NOATIME_FL; |
| if (di_flags & XFS_DIFLAG_NODUMP) |
| flags |= FS_NODUMP_FL; |
| return flags; |
| } |
| |
| STATIC int |
| xfs_ioc_fsgetxattr( |
| xfs_inode_t *ip, |
| int attr, |
| void __user *arg) |
| { |
| struct fsxattr fa; |
| |
| xfs_ilock(ip, XFS_ILOCK_SHARED); |
| fa.fsx_xflags = xfs_ip2xflags(ip); |
| fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; |
| fa.fsx_projid = ip->i_d.di_projid; |
| |
| if (attr) { |
| if (ip->i_afp) { |
| if (ip->i_afp->if_flags & XFS_IFEXTENTS) |
| fa.fsx_nextents = ip->i_afp->if_bytes / |
| sizeof(xfs_bmbt_rec_t); |
| else |
| fa.fsx_nextents = ip->i_d.di_anextents; |
| } else |
| fa.fsx_nextents = 0; |
| } else { |
| if (ip->i_df.if_flags & XFS_IFEXTENTS) |
| fa.fsx_nextents = ip->i_df.if_bytes / |
| sizeof(xfs_bmbt_rec_t); |
| else |
| fa.fsx_nextents = ip->i_d.di_nextents; |
| } |
| xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| |
| if (copy_to_user(arg, &fa, sizeof(fa))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_fssetxattr( |
| xfs_inode_t *ip, |
| struct file *filp, |
| void __user *arg) |
| { |
| struct fsxattr fa; |
| struct bhv_vattr *vattr; |
| int error; |
| int attr_flags; |
| |
| if (copy_from_user(&fa, arg, sizeof(fa))) |
| return -EFAULT; |
| |
| vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
| if (unlikely(!vattr)) |
| return -ENOMEM; |
| |
| attr_flags = 0; |
| if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| attr_flags |= ATTR_NONBLOCK; |
| |
| vattr->va_mask = XFS_AT_XFLAGS | XFS_AT_EXTSIZE | XFS_AT_PROJID; |
| vattr->va_xflags = fa.fsx_xflags; |
| vattr->va_extsize = fa.fsx_extsize; |
| vattr->va_projid = fa.fsx_projid; |
| |
| error = -xfs_setattr(ip, vattr, attr_flags, NULL); |
| if (!error) |
| vn_revalidate(XFS_ITOV(ip)); /* update flags */ |
| kfree(vattr); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_getxflags( |
| xfs_inode_t *ip, |
| void __user *arg) |
| { |
| unsigned int flags; |
| |
| flags = xfs_di2lxflags(ip->i_d.di_flags); |
| if (copy_to_user(arg, &flags, sizeof(flags))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_setxflags( |
| xfs_inode_t *ip, |
| struct file *filp, |
| void __user *arg) |
| { |
| struct bhv_vattr *vattr; |
| unsigned int flags; |
| int attr_flags; |
| int error; |
| |
| if (copy_from_user(&flags, arg, sizeof(flags))) |
| return -EFAULT; |
| |
| if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
| FS_NOATIME_FL | FS_NODUMP_FL | \ |
| FS_SYNC_FL)) |
| return -EOPNOTSUPP; |
| |
| vattr = kmalloc(sizeof(*vattr), GFP_KERNEL); |
| if (unlikely(!vattr)) |
| return -ENOMEM; |
| |
| attr_flags = 0; |
| if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| attr_flags |= ATTR_NONBLOCK; |
| |
| vattr->va_mask = XFS_AT_XFLAGS; |
| vattr->va_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
| |
| error = -xfs_setattr(ip, vattr, attr_flags, NULL); |
| if (likely(!error)) |
| vn_revalidate(XFS_ITOV(ip)); /* update flags */ |
| kfree(vattr); |
| return error; |
| } |
| |
| STATIC int |
| xfs_ioc_getbmap( |
| struct xfs_inode *ip, |
| int ioflags, |
| unsigned int cmd, |
| void __user *arg) |
| { |
| struct getbmap bm; |
| int iflags; |
| int error; |
| |
| if (copy_from_user(&bm, arg, sizeof(bm))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (bm.bmv_count < 2) |
| return -XFS_ERROR(EINVAL); |
| |
| iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| if (ioflags & IO_INVIS) |
| iflags |= BMV_IF_NO_DMAPI_READ; |
| |
| error = xfs_getbmap(ip, &bm, (struct getbmap __user *)arg+1, iflags); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &bm, sizeof(bm))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_getbmapx( |
| struct xfs_inode *ip, |
| void __user *arg) |
| { |
| struct getbmapx bmx; |
| struct getbmap bm; |
| int iflags; |
| int error; |
| |
| if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (bmx.bmv_count < 2) |
| return -XFS_ERROR(EINVAL); |
| |
| /* |
| * Map input getbmapx structure to a getbmap |
| * structure for xfs_getbmap. |
| */ |
| GETBMAP_CONVERT(bmx, bm); |
| |
| iflags = bmx.bmv_iflags; |
| |
| if (iflags & (~BMV_IF_VALID)) |
| return -XFS_ERROR(EINVAL); |
| |
| iflags |= BMV_IF_EXTENDED; |
| |
| error = xfs_getbmap(ip, &bm, (struct getbmapx __user *)arg+1, iflags); |
| if (error) |
| return -error; |
| |
| GETBMAP_CONVERT(bm, bmx); |
| |
| if (copy_to_user(arg, &bmx, sizeof(bmx))) |
| return -XFS_ERROR(EFAULT); |
| |
| return 0; |
| } |
| |
| int |
| xfs_ioctl( |
| xfs_inode_t *ip, |
| struct file *filp, |
| int ioflags, |
| unsigned int cmd, |
| void __user *arg) |
| { |
| struct inode *inode = filp->f_path.dentry->d_inode; |
| xfs_mount_t *mp = ip->i_mount; |
| int error; |
| |
| xfs_itrace_entry(XFS_I(inode)); |
| switch (cmd) { |
| |
| case XFS_IOC_ALLOCSP: |
| case XFS_IOC_FREESP: |
| case XFS_IOC_RESVSP: |
| case XFS_IOC_UNRESVSP: |
| case XFS_IOC_ALLOCSP64: |
| case XFS_IOC_FREESP64: |
| case XFS_IOC_RESVSP64: |
| case XFS_IOC_UNRESVSP64: |
| /* |
| * Only allow the sys admin to reserve space unless |
| * unwritten extents are enabled. |
| */ |
| if (!xfs_sb_version_hasextflgbit(&mp->m_sb) && |
| !capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| return xfs_ioc_space(ip, inode, filp, ioflags, cmd, arg); |
| |
| case XFS_IOC_DIOINFO: { |
| struct dioattr da; |
| xfs_buftarg_t *target = |
| XFS_IS_REALTIME_INODE(ip) ? |
| mp->m_rtdev_targp : mp->m_ddev_targp; |
| |
| da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
| da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
| |
| if (copy_to_user(arg, &da, sizeof(da))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| case XFS_IOC_FSBULKSTAT_SINGLE: |
| case XFS_IOC_FSBULKSTAT: |
| case XFS_IOC_FSINUMBERS: |
| return xfs_ioc_bulkstat(mp, cmd, arg); |
| |
| case XFS_IOC_FSGEOMETRY_V1: |
| return xfs_ioc_fsgeometry_v1(mp, arg); |
| |
| case XFS_IOC_FSGEOMETRY: |
| return xfs_ioc_fsgeometry(mp, arg); |
| |
| case XFS_IOC_GETVERSION: |
| return put_user(inode->i_generation, (int __user *)arg); |
| |
| case XFS_IOC_FSGETXATTR: |
| return xfs_ioc_fsgetxattr(ip, 0, arg); |
| case XFS_IOC_FSGETXATTRA: |
| return xfs_ioc_fsgetxattr(ip, 1, arg); |
| case XFS_IOC_FSSETXATTR: |
| return xfs_ioc_fssetxattr(ip, filp, arg); |
| case XFS_IOC_GETXFLAGS: |
| return xfs_ioc_getxflags(ip, arg); |
| case XFS_IOC_SETXFLAGS: |
| return xfs_ioc_setxflags(ip, filp, arg); |
| |
| case XFS_IOC_FSSETDM: { |
| struct fsdmidata dmi; |
| |
| if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
| dmi.fsd_dmstate); |
| return -error; |
| } |
| |
| case XFS_IOC_GETBMAP: |
| case XFS_IOC_GETBMAPA: |
| return xfs_ioc_getbmap(ip, ioflags, cmd, arg); |
| |
| case XFS_IOC_GETBMAPX: |
| return xfs_ioc_getbmapx(ip, arg); |
| |
| case XFS_IOC_FD_TO_HANDLE: |
| case XFS_IOC_PATH_TO_HANDLE: |
| case XFS_IOC_PATH_TO_FSHANDLE: |
| return xfs_find_handle(cmd, arg); |
| |
| case XFS_IOC_OPEN_BY_HANDLE: |
| return xfs_open_by_handle(mp, arg, filp, inode); |
| |
| case XFS_IOC_FSSETDM_BY_HANDLE: |
| return xfs_fssetdm_by_handle(mp, arg, inode); |
| |
| case XFS_IOC_READLINK_BY_HANDLE: |
| return xfs_readlink_by_handle(mp, arg, inode); |
| |
| case XFS_IOC_ATTRLIST_BY_HANDLE: |
| return xfs_attrlist_by_handle(mp, arg, inode); |
| |
| case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| return xfs_attrmulti_by_handle(mp, arg, filp, inode); |
| |
| case XFS_IOC_SWAPEXT: { |
| error = xfs_swapext((struct xfs_swapext __user *)arg); |
| return -error; |
| } |
| |
| case XFS_IOC_FSCOUNTS: { |
| xfs_fsop_counts_t out; |
| |
| error = xfs_fs_counts(mp, &out); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &out, sizeof(out))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| case XFS_IOC_SET_RESBLKS: { |
| xfs_fsop_resblks_t inout; |
| __uint64_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&inout, arg, sizeof(inout))) |
| return -XFS_ERROR(EFAULT); |
| |
| /* input parameter is passed in resblks field of structure */ |
| in = inout.resblks; |
| error = xfs_reserve_blocks(mp, &in, &inout); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &inout, sizeof(inout))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| case XFS_IOC_GET_RESBLKS: { |
| xfs_fsop_resblks_t out; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| error = xfs_reserve_blocks(mp, NULL, &out); |
| if (error) |
| return -error; |
| |
| if (copy_to_user(arg, &out, sizeof(out))) |
| return -XFS_ERROR(EFAULT); |
| |
| return 0; |
| } |
| |
| case XFS_IOC_FSGROWFSDATA: { |
| xfs_growfs_data_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_growfs_data(mp, &in); |
| return -error; |
| } |
| |
| case XFS_IOC_FSGROWFSLOG: { |
| xfs_growfs_log_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_growfs_log(mp, &in); |
| return -error; |
| } |
| |
| case XFS_IOC_FSGROWFSRT: { |
| xfs_growfs_rt_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_growfs_rt(mp, &in); |
| return -error; |
| } |
| |
| case XFS_IOC_FREEZE: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (inode->i_sb->s_frozen == SB_UNFROZEN) |
| freeze_bdev(inode->i_sb->s_bdev); |
| return 0; |
| |
| case XFS_IOC_THAW: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| if (inode->i_sb->s_frozen != SB_UNFROZEN) |
| thaw_bdev(inode->i_sb->s_bdev, inode->i_sb); |
| return 0; |
| |
| case XFS_IOC_GOINGDOWN: { |
| __uint32_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (get_user(in, (__uint32_t __user *)arg)) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_fs_goingdown(mp, in); |
| return -error; |
| } |
| |
| case XFS_IOC_ERROR_INJECTION: { |
| xfs_error_injection_t in; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_errortag_add(in.errtag, mp); |
| return -error; |
| } |
| |
| case XFS_IOC_ERROR_CLEARALL: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| error = xfs_errortag_clearall(mp, 1); |
| return -error; |
| |
| default: |
| return -ENOTTY; |
| } |
| } |