| /* |
| * 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_alloc.h" |
| #include "xfs_mount.h" |
| #include "xfs_bmap_btree.h" |
| #include "xfs_dinode.h" |
| #include "xfs_inode.h" |
| #include "xfs_ioctl.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_itable.h" |
| #include "xfs_error.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 "xfs_quota.h" |
| #include "xfs_inode_item.h" |
| #include "xfs_export.h" |
| #include "xfs_trace.h" |
| |
| #include <linux/capability.h> |
| #include <linux/dcache.h> |
| #include <linux/mount.h> |
| #include <linux/namei.h> |
| #include <linux/pagemap.h> |
| #include <linux/slab.h> |
| #include <linux/exportfs.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 |
| */ |
| int |
| xfs_find_handle( |
| unsigned int cmd, |
| xfs_fsop_handlereq_t *hreq) |
| { |
| int hsize; |
| xfs_handle_t handle; |
| struct inode *inode; |
| struct file *file = NULL; |
| struct path path; |
| int error; |
| struct xfs_inode *ip; |
| |
| if (cmd == XFS_IOC_FD_TO_HANDLE) { |
| file = fget(hreq->fd); |
| if (!file) |
| return -EBADF; |
| inode = file->f_path.dentry->d_inode; |
| } else { |
| error = user_lpath((const char __user *)hreq->path, &path); |
| if (error) |
| return error; |
| inode = path.dentry->d_inode; |
| } |
| ip = XFS_I(inode); |
| |
| /* |
| * We can only generate handles for inodes residing on a XFS filesystem, |
| * and only for regular files, directories or symbolic links. |
| */ |
| error = -EINVAL; |
| if (inode->i_sb->s_magic != XFS_SB_MAGIC) |
| goto out_put; |
| |
| error = -EBADF; |
| if (!S_ISREG(inode->i_mode) && |
| !S_ISDIR(inode->i_mode) && |
| !S_ISLNK(inode->i_mode)) |
| goto out_put; |
| |
| |
| memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); |
| |
| if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { |
| /* |
| * This handle only contains an fsid, zero the rest. |
| */ |
| memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); |
| hsize = sizeof(xfs_fsid_t); |
| } else { |
| int lock_mode; |
| |
| lock_mode = xfs_ilock_map_shared(ip); |
| 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); |
| } |
| |
| error = -EFAULT; |
| if (copy_to_user(hreq->ohandle, &handle, hsize) || |
| copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) |
| goto out_put; |
| |
| error = 0; |
| |
| out_put: |
| if (cmd == XFS_IOC_FD_TO_HANDLE) |
| fput(file); |
| else |
| path_put(&path); |
| return error; |
| } |
| |
| /* |
| * No need to do permission checks on the various pathname components |
| * as the handle operations are privileged. |
| */ |
| STATIC int |
| xfs_handle_acceptable( |
| void *context, |
| struct dentry *dentry) |
| { |
| return 1; |
| } |
| |
| /* |
| * Convert userspace handle data into a dentry. |
| */ |
| struct dentry * |
| xfs_handle_to_dentry( |
| struct file *parfilp, |
| void __user *uhandle, |
| u32 hlen) |
| { |
| xfs_handle_t handle; |
| struct xfs_fid64 fid; |
| |
| /* |
| * Only allow handle opens under a directory. |
| */ |
| if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode)) |
| return ERR_PTR(-ENOTDIR); |
| |
| if (hlen != sizeof(xfs_handle_t)) |
| return ERR_PTR(-EINVAL); |
| if (copy_from_user(&handle, uhandle, hlen)) |
| return ERR_PTR(-EFAULT); |
| if (handle.ha_fid.fid_len != |
| sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) |
| return ERR_PTR(-EINVAL); |
| |
| memset(&fid, 0, sizeof(struct fid)); |
| fid.ino = handle.ha_fid.fid_ino; |
| fid.gen = handle.ha_fid.fid_gen; |
| |
| return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, |
| FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, |
| xfs_handle_acceptable, NULL); |
| } |
| |
| STATIC struct dentry * |
| xfs_handlereq_to_dentry( |
| struct file *parfilp, |
| xfs_fsop_handlereq_t *hreq) |
| { |
| return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); |
| } |
| |
| int |
| xfs_open_by_handle( |
| struct file *parfilp, |
| xfs_fsop_handlereq_t *hreq) |
| { |
| const struct cred *cred = current_cred(); |
| int error; |
| int fd; |
| int permflag; |
| struct file *filp; |
| struct inode *inode; |
| struct dentry *dentry; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| inode = dentry->d_inode; |
| |
| /* Restrict xfs_open_by_handle to directories & regular files. */ |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| error = -XFS_ERROR(EPERM); |
| goto out_dput; |
| } |
| |
| #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)) { |
| error = -XFS_ERROR(EPERM); |
| goto out_dput; |
| } |
| |
| if ((permflag & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| error = -XFS_ERROR(EACCES); |
| goto out_dput; |
| } |
| |
| /* Can't write directories. */ |
| if (S_ISDIR(inode->i_mode) && (permflag & FMODE_WRITE)) { |
| error = -XFS_ERROR(EISDIR); |
| goto out_dput; |
| } |
| |
| fd = get_unused_fd(); |
| if (fd < 0) { |
| error = fd; |
| goto out_dput; |
| } |
| |
| filp = dentry_open(dentry, mntget(parfilp->f_path.mnt), |
| hreq->oflags, cred); |
| if (IS_ERR(filp)) { |
| put_unused_fd(fd); |
| return PTR_ERR(filp); |
| } |
| |
| if (inode->i_mode & S_IFREG) { |
| filp->f_flags |= O_NOATIME; |
| filp->f_mode |= FMODE_NOCMTIME; |
| } |
| |
| fd_install(fd, filp); |
| return fd; |
| |
| out_dput: |
| dput(dentry); |
| return error; |
| } |
| |
| /* |
| * 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; |
| } |
| |
| |
| int |
| xfs_readlink_by_handle( |
| struct file *parfilp, |
| xfs_fsop_handlereq_t *hreq) |
| { |
| struct dentry *dentry; |
| __u32 olen; |
| void *link; |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| /* Restrict this handle operation to symlinks only. */ |
| if (!S_ISLNK(dentry->d_inode->i_mode)) { |
| error = -XFS_ERROR(EINVAL); |
| goto out_dput; |
| } |
| |
| if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { |
| error = -XFS_ERROR(EFAULT); |
| goto out_dput; |
| } |
| |
| link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
| if (!link) { |
| error = -XFS_ERROR(ENOMEM); |
| goto out_dput; |
| } |
| |
| error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
| if (error) |
| goto out_kfree; |
| error = do_readlink(hreq->ohandle, olen, link); |
| if (error) |
| goto out_kfree; |
| |
| out_kfree: |
| kfree(link); |
| out_dput: |
| dput(dentry); |
| return error; |
| } |
| |
| STATIC int |
| xfs_fssetdm_by_handle( |
| struct file *parfilp, |
| void __user *arg) |
| { |
| int error; |
| struct fsdmidata fsd; |
| xfs_fsop_setdm_handlereq_t dmhreq; |
| struct dentry *dentry; |
| |
| if (!capable(CAP_MKNOD)) |
| return -XFS_ERROR(EPERM); |
| if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_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(dentry->d_inode), fsd.fsd_dmevmask, |
| fsd.fsd_dmstate); |
| |
| out: |
| dput(dentry); |
| return error; |
| } |
| |
| STATIC int |
| xfs_attrlist_by_handle( |
| struct file *parfilp, |
| void __user *arg) |
| { |
| int error = -ENOMEM; |
| attrlist_cursor_kern_t *cursor; |
| xfs_fsop_attrlist_handlereq_t al_hreq; |
| struct dentry *dentry; |
| 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); |
| |
| /* |
| * Reject flags, only allow namespaces. |
| */ |
| if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) |
| return -XFS_ERROR(EINVAL); |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| kbuf = kmalloc(al_hreq.buflen, GFP_KERNEL); |
| if (!kbuf) |
| goto out_dput; |
| |
| cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| error = -xfs_attr_list(XFS_I(dentry->d_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_dput: |
| dput(dentry); |
| return error; |
| } |
| |
| int |
| xfs_attrmulti_attr_get( |
| struct inode *inode, |
| unsigned char *name, |
| unsigned char __user *ubuf, |
| __uint32_t *len, |
| __uint32_t flags) |
| { |
| unsigned 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); |
| if (error) |
| goto out_kfree; |
| |
| if (copy_to_user(ubuf, kbuf, *len)) |
| error = EFAULT; |
| |
| out_kfree: |
| kfree(kbuf); |
| return error; |
| } |
| |
| int |
| xfs_attrmulti_attr_set( |
| struct inode *inode, |
| unsigned char *name, |
| const unsigned char __user *ubuf, |
| __uint32_t len, |
| __uint32_t flags) |
| { |
| unsigned char *kbuf; |
| int error = EFAULT; |
| |
| if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| return EPERM; |
| if (len > XATTR_SIZE_MAX) |
| return EINVAL; |
| |
| kbuf = memdup_user(ubuf, len); |
| if (IS_ERR(kbuf)) |
| return PTR_ERR(kbuf); |
| |
| error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
| |
| return error; |
| } |
| |
| int |
| xfs_attrmulti_attr_remove( |
| struct inode *inode, |
| unsigned 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( |
| struct file *parfilp, |
| void __user *arg) |
| { |
| int error; |
| xfs_attr_multiop_t *ops; |
| xfs_fsop_attrmulti_handlereq_t am_hreq; |
| struct dentry *dentry; |
| unsigned int i, size; |
| unsigned 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); |
| |
| /* overflow check */ |
| if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) |
| return -E2BIG; |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| error = E2BIG; |
| size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); |
| if (!size || size > 16 * PAGE_SIZE) |
| goto out_dput; |
| |
| ops = memdup_user(am_hreq.ops, size); |
| if (IS_ERR(ops)) { |
| error = PTR_ERR(ops); |
| goto out_dput; |
| } |
| |
| 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((char *)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( |
| dentry->d_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( |
| dentry->d_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( |
| dentry->d_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_dput: |
| dput(dentry); |
| return -error; |
| } |
| |
| int |
| xfs_ioc_space( |
| struct xfs_inode *ip, |
| struct inode *inode, |
| struct file *filp, |
| int ioflags, |
| unsigned int cmd, |
| xfs_flock64_t *bf) |
| { |
| int attr_flags = 0; |
| int error; |
| |
| /* |
| * Only allow the sys admin to reserve space unless |
| * unwritten extents are enabled. |
| */ |
| if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && |
| !capable(CAP_SYS_ADMIN)) |
| return -XFS_ERROR(EPERM); |
| |
| 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 (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| attr_flags |= XFS_ATTR_NONBLOCK; |
| if (ioflags & IO_INVIS) |
| attr_flags |= XFS_ATTR_DMI; |
| |
| error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, 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, xfs_bulkstat_one, |
| sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| &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 void |
| xfs_set_diflags( |
| struct xfs_inode *ip, |
| unsigned int xflags) |
| { |
| unsigned int di_flags; |
| |
| /* can't set PREALLOC this way, just preserve it */ |
| di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| if (xflags & XFS_XFLAG_IMMUTABLE) |
| di_flags |= XFS_DIFLAG_IMMUTABLE; |
| if (xflags & XFS_XFLAG_APPEND) |
| di_flags |= XFS_DIFLAG_APPEND; |
| if (xflags & XFS_XFLAG_SYNC) |
| di_flags |= XFS_DIFLAG_SYNC; |
| if (xflags & XFS_XFLAG_NOATIME) |
| di_flags |= XFS_DIFLAG_NOATIME; |
| if (xflags & XFS_XFLAG_NODUMP) |
| di_flags |= XFS_DIFLAG_NODUMP; |
| if (xflags & XFS_XFLAG_PROJINHERIT) |
| di_flags |= XFS_DIFLAG_PROJINHERIT; |
| if (xflags & XFS_XFLAG_NODEFRAG) |
| di_flags |= XFS_DIFLAG_NODEFRAG; |
| if (xflags & XFS_XFLAG_FILESTREAM) |
| di_flags |= XFS_DIFLAG_FILESTREAM; |
| if ((ip->i_d.di_mode & S_IFMT) == S_IFDIR) { |
| if (xflags & XFS_XFLAG_RTINHERIT) |
| di_flags |= XFS_DIFLAG_RTINHERIT; |
| if (xflags & XFS_XFLAG_NOSYMLINKS) |
| di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| if (xflags & XFS_XFLAG_EXTSZINHERIT) |
| di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| } else if ((ip->i_d.di_mode & S_IFMT) == S_IFREG) { |
| if (xflags & XFS_XFLAG_REALTIME) |
| di_flags |= XFS_DIFLAG_REALTIME; |
| if (xflags & XFS_XFLAG_EXTSIZE) |
| di_flags |= XFS_DIFLAG_EXTSIZE; |
| } |
| |
| ip->i_d.di_flags = di_flags; |
| } |
| |
| STATIC void |
| xfs_diflags_to_linux( |
| struct xfs_inode *ip) |
| { |
| struct inode *inode = VFS_I(ip); |
| unsigned int xflags = xfs_ip2xflags(ip); |
| |
| if (xflags & XFS_XFLAG_IMMUTABLE) |
| inode->i_flags |= S_IMMUTABLE; |
| else |
| inode->i_flags &= ~S_IMMUTABLE; |
| if (xflags & XFS_XFLAG_APPEND) |
| inode->i_flags |= S_APPEND; |
| else |
| inode->i_flags &= ~S_APPEND; |
| if (xflags & XFS_XFLAG_SYNC) |
| inode->i_flags |= S_SYNC; |
| else |
| inode->i_flags &= ~S_SYNC; |
| if (xflags & XFS_XFLAG_NOATIME) |
| inode->i_flags |= S_NOATIME; |
| else |
| inode->i_flags &= ~S_NOATIME; |
| } |
| |
| #define FSX_PROJID 1 |
| #define FSX_EXTSIZE 2 |
| #define FSX_XFLAGS 4 |
| #define FSX_NONBLOCK 8 |
| |
| STATIC int |
| xfs_ioctl_setattr( |
| xfs_inode_t *ip, |
| struct fsxattr *fa, |
| int mask) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_trans *tp; |
| unsigned int lock_flags = 0; |
| struct xfs_dquot *udqp = NULL; |
| struct xfs_dquot *gdqp = NULL; |
| struct xfs_dquot *olddquot = NULL; |
| int code; |
| |
| xfs_itrace_entry(ip); |
| |
| if (mp->m_flags & XFS_MOUNT_RDONLY) |
| return XFS_ERROR(EROFS); |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return XFS_ERROR(EIO); |
| |
| /* |
| * If disk quotas is on, we make sure that the dquots do exist on disk, |
| * before we start any other transactions. Trying to do this later |
| * is messy. We don't care to take a readlock to look at the ids |
| * in inode here, because we can't hold it across the trans_reserve. |
| * If the IDs do change before we take the ilock, we're covered |
| * because the i_*dquot fields will get updated anyway. |
| */ |
| if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { |
| code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, |
| ip->i_d.di_gid, fa->fsx_projid, |
| XFS_QMOPT_PQUOTA, &udqp, &gdqp); |
| if (code) |
| return code; |
| } |
| |
| /* |
| * For the other attributes, we acquire the inode lock and |
| * first do an error checking pass. |
| */ |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); |
| if (code) |
| goto error_return; |
| |
| lock_flags = XFS_ILOCK_EXCL; |
| xfs_ilock(ip, lock_flags); |
| |
| /* |
| * CAP_FOWNER overrides the following restrictions: |
| * |
| * The user ID of the calling process must be equal |
| * to the file owner ID, except in cases where the |
| * CAP_FSETID capability is applicable. |
| */ |
| if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| |
| /* |
| * Do a quota reservation only if projid is actually going to change. |
| */ |
| if (mask & FSX_PROJID) { |
| if (XFS_IS_QUOTA_RUNNING(mp) && |
| XFS_IS_PQUOTA_ON(mp) && |
| ip->i_d.di_projid != fa->fsx_projid) { |
| ASSERT(tp); |
| code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
| capable(CAP_FOWNER) ? |
| XFS_QMOPT_FORCE_RES : 0); |
| if (code) /* out of quota */ |
| goto error_return; |
| } |
| } |
| |
| if (mask & FSX_EXTSIZE) { |
| /* |
| * Can't change extent size if any extents are allocated. |
| */ |
| if (ip->i_d.di_nextents && |
| ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
| fa->fsx_extsize)) { |
| code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| goto error_return; |
| } |
| |
| /* |
| * Extent size must be a multiple of the appropriate block |
| * size, if set at all. |
| */ |
| if (fa->fsx_extsize != 0) { |
| xfs_extlen_t size; |
| |
| if (XFS_IS_REALTIME_INODE(ip) || |
| ((mask & FSX_XFLAGS) && |
| (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { |
| size = mp->m_sb.sb_rextsize << |
| mp->m_sb.sb_blocklog; |
| } else { |
| size = mp->m_sb.sb_blocksize; |
| } |
| |
| if (fa->fsx_extsize % size) { |
| code = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| } |
| } |
| |
| |
| if (mask & FSX_XFLAGS) { |
| /* |
| * Can't change realtime flag if any extents are allocated. |
| */ |
| if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| (XFS_IS_REALTIME_INODE(ip)) != |
| (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| goto error_return; |
| } |
| |
| /* |
| * If realtime flag is set then must have realtime data. |
| */ |
| if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| if ((mp->m_sb.sb_rblocks == 0) || |
| (mp->m_sb.sb_rextsize == 0) || |
| (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { |
| code = XFS_ERROR(EINVAL); |
| goto error_return; |
| } |
| } |
| |
| /* |
| * Can't modify an immutable/append-only file unless |
| * we have appropriate permission. |
| */ |
| if ((ip->i_d.di_flags & |
| (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || |
| (fa->fsx_xflags & |
| (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && |
| !capable(CAP_LINUX_IMMUTABLE)) { |
| code = XFS_ERROR(EPERM); |
| goto error_return; |
| } |
| } |
| |
| xfs_trans_ijoin(tp, ip); |
| |
| /* |
| * Change file ownership. Must be the owner or privileged. |
| */ |
| if (mask & FSX_PROJID) { |
| /* |
| * CAP_FSETID overrides the following restrictions: |
| * |
| * The set-user-ID and set-group-ID bits of a file will be |
| * cleared upon successful return from chown() |
| */ |
| if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| !capable(CAP_FSETID)) |
| ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| |
| /* |
| * Change the ownerships and register quota modifications |
| * in the transaction. |
| */ |
| if (ip->i_d.di_projid != fa->fsx_projid) { |
| if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { |
| olddquot = xfs_qm_vop_chown(tp, ip, |
| &ip->i_gdquot, gdqp); |
| } |
| ip->i_d.di_projid = fa->fsx_projid; |
| |
| /* |
| * We may have to rev the inode as well as |
| * the superblock version number since projids didn't |
| * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. |
| */ |
| if (ip->i_d.di_version == 1) |
| xfs_bump_ino_vers2(tp, ip); |
| } |
| |
| } |
| |
| if (mask & FSX_EXTSIZE) |
| ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; |
| if (mask & FSX_XFLAGS) { |
| xfs_set_diflags(ip, fa->fsx_xflags); |
| xfs_diflags_to_linux(ip); |
| } |
| |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| xfs_ichgtime(ip, XFS_ICHGTIME_CHG); |
| |
| XFS_STATS_INC(xs_ig_attrchg); |
| |
| /* |
| * If this is a synchronous mount, make sure that the |
| * transaction goes to disk before returning to the user. |
| * This is slightly sub-optimal in that truncates require |
| * two sync transactions instead of one for wsync filesystems. |
| * One for the truncate and one for the timestamps since we |
| * don't want to change the timestamps unless we're sure the |
| * truncate worked. Truncates are less than 1% of the laddis |
| * mix so this probably isn't worth the trouble to optimize. |
| */ |
| if (mp->m_flags & XFS_MOUNT_WSYNC) |
| xfs_trans_set_sync(tp); |
| code = xfs_trans_commit(tp, 0); |
| xfs_iunlock(ip, lock_flags); |
| |
| /* |
| * Release any dquot(s) the inode had kept before chown. |
| */ |
| xfs_qm_dqrele(olddquot); |
| xfs_qm_dqrele(udqp); |
| xfs_qm_dqrele(gdqp); |
| |
| return code; |
| |
| error_return: |
| xfs_qm_dqrele(udqp); |
| xfs_qm_dqrele(gdqp); |
| xfs_trans_cancel(tp, 0); |
| if (lock_flags) |
| xfs_iunlock(ip, lock_flags); |
| return code; |
| } |
| |
| STATIC int |
| xfs_ioc_fssetxattr( |
| xfs_inode_t *ip, |
| struct file *filp, |
| void __user *arg) |
| { |
| struct fsxattr fa; |
| unsigned int mask; |
| |
| if (copy_from_user(&fa, arg, sizeof(fa))) |
| return -EFAULT; |
| |
| mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; |
| if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| mask |= FSX_NONBLOCK; |
| |
| return -xfs_ioctl_setattr(ip, &fa, mask); |
| } |
| |
| 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 fsxattr fa; |
| unsigned int flags; |
| unsigned int mask; |
| |
| 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; |
| |
| mask = FSX_XFLAGS; |
| if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| mask |= FSX_NONBLOCK; |
| fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
| |
| return -xfs_ioctl_setattr(ip, &fa, mask); |
| } |
| |
| STATIC int |
| xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) |
| { |
| struct getbmap __user *base = *ap; |
| |
| /* copy only getbmap portion (not getbmapx) */ |
| if (copy_to_user(base, bmv, sizeof(struct getbmap))) |
| return XFS_ERROR(EFAULT); |
| |
| *ap += sizeof(struct getbmap); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_getbmap( |
| struct xfs_inode *ip, |
| int ioflags, |
| unsigned int cmd, |
| void __user *arg) |
| { |
| struct getbmapx bmx; |
| int error; |
| |
| if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (bmx.bmv_count < 2) |
| return -XFS_ERROR(EINVAL); |
| |
| bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| if (ioflags & IO_INVIS) |
| bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; |
| |
| error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, |
| (struct getbmap *)arg+1); |
| if (error) |
| return -error; |
| |
| /* copy back header - only size of getbmap */ |
| if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) |
| return -XFS_ERROR(EFAULT); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) |
| { |
| struct getbmapx __user *base = *ap; |
| |
| if (copy_to_user(base, bmv, sizeof(struct getbmapx))) |
| return XFS_ERROR(EFAULT); |
| |
| *ap += sizeof(struct getbmapx); |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_getbmapx( |
| struct xfs_inode *ip, |
| void __user *arg) |
| { |
| struct getbmapx bmx; |
| int error; |
| |
| if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| return -XFS_ERROR(EFAULT); |
| |
| if (bmx.bmv_count < 2) |
| return -XFS_ERROR(EINVAL); |
| |
| if (bmx.bmv_iflags & (~BMV_IF_VALID)) |
| return -XFS_ERROR(EINVAL); |
| |
| error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, |
| (struct getbmapx *)arg+1); |
| if (error) |
| return -error; |
| |
| /* copy back header */ |
| if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) |
| return -XFS_ERROR(EFAULT); |
| |
| return 0; |
| } |
| |
| /* |
| * Note: some of the ioctl's return positive numbers as a |
| * byte count indicating success, such as readlink_by_handle. |
| * So we don't "sign flip" like most other routines. This means |
| * true errors need to be returned as a negative value. |
| */ |
| long |
| xfs_file_ioctl( |
| struct file *filp, |
| unsigned int cmd, |
| unsigned long p) |
| { |
| struct inode *inode = filp->f_path.dentry->d_inode; |
| struct xfs_inode *ip = XFS_I(inode); |
| struct xfs_mount *mp = ip->i_mount; |
| void __user *arg = (void __user *)p; |
| int ioflags = 0; |
| int error; |
| |
| if (filp->f_mode & FMODE_NOCMTIME) |
| ioflags |= IO_INVIS; |
| |
| xfs_itrace_entry(ip); |
| |
| 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: { |
| xfs_flock64_t bf; |
| |
| if (copy_from_user(&bf, arg, sizeof(bf))) |
| return -XFS_ERROR(EFAULT); |
| return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); |
| } |
| 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: { |
| xfs_fsop_handlereq_t hreq; |
| |
| if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| return -XFS_ERROR(EFAULT); |
| return xfs_find_handle(cmd, &hreq); |
| } |
| case XFS_IOC_OPEN_BY_HANDLE: { |
| xfs_fsop_handlereq_t hreq; |
| |
| if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| return xfs_open_by_handle(filp, &hreq); |
| } |
| case XFS_IOC_FSSETDM_BY_HANDLE: |
| return xfs_fssetdm_by_handle(filp, arg); |
| |
| case XFS_IOC_READLINK_BY_HANDLE: { |
| xfs_fsop_handlereq_t hreq; |
| |
| if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| return -XFS_ERROR(EFAULT); |
| return xfs_readlink_by_handle(filp, &hreq); |
| } |
| case XFS_IOC_ATTRLIST_BY_HANDLE: |
| return xfs_attrlist_by_handle(filp, arg); |
| |
| case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| return xfs_attrmulti_by_handle(filp, arg); |
| |
| case XFS_IOC_SWAPEXT: { |
| struct xfs_swapext sxp; |
| |
| if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) |
| return -XFS_ERROR(EFAULT); |
| error = xfs_swapext(&sxp); |
| 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 (mp->m_flags & XFS_MOUNT_RDONLY) |
| return -XFS_ERROR(EROFS); |
| |
| 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 (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 (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 (copy_from_user(&in, arg, sizeof(in))) |
| return -XFS_ERROR(EFAULT); |
| |
| error = xfs_growfs_rt(mp, &in); |
| return -error; |
| } |
| |
| 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; |
| } |
| } |