| /* |
| * 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_shared.h" |
| #include "xfs_format.h" |
| #include "xfs_log_format.h" |
| #include "xfs_trans_resv.h" |
| #include "xfs_mount.h" |
| #include "xfs_inode.h" |
| #include "xfs_ioctl.h" |
| #include "xfs_alloc.h" |
| #include "xfs_rtalloc.h" |
| #include "xfs_itable.h" |
| #include "xfs_error.h" |
| #include "xfs_attr.h" |
| #include "xfs_bmap.h" |
| #include "xfs_bmap_util.h" |
| #include "xfs_fsops.h" |
| #include "xfs_discard.h" |
| #include "xfs_quota.h" |
| #include "xfs_export.h" |
| #include "xfs_trace.h" |
| #include "xfs_icache.h" |
| #include "xfs_symlink.h" |
| #include "xfs_trans.h" |
| #include "xfs_pnfs.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 fd f = {NULL}; |
| struct path path; |
| int error; |
| struct xfs_inode *ip; |
| |
| if (cmd == XFS_IOC_FD_TO_HANDLE) { |
| f = fdget(hreq->fd); |
| if (!f.file) |
| return -EBADF; |
| inode = file_inode(f.file); |
| } else { |
| error = user_lpath((const char __user *)hreq->path, &path); |
| if (error) |
| return error; |
| inode = d_inode(path.dentry); |
| } |
| 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 { |
| 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; |
| |
| 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) |
| fdput(f); |
| 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(file_inode(parfilp)->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; |
| fmode_t fmode; |
| struct path path; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| inode = d_inode(dentry); |
| |
| /* Restrict xfs_open_by_handle to directories & regular files. */ |
| if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| error = -EPERM; |
| goto out_dput; |
| } |
| |
| #if BITS_PER_LONG != 32 |
| hreq->oflags |= O_LARGEFILE; |
| #endif |
| |
| permflag = hreq->oflags; |
| fmode = OPEN_FMODE(permflag); |
| if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| (fmode & FMODE_WRITE) && IS_APPEND(inode)) { |
| error = -EPERM; |
| goto out_dput; |
| } |
| |
| if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| error = -EACCES; |
| goto out_dput; |
| } |
| |
| /* Can't write directories. */ |
| if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { |
| error = -EISDIR; |
| goto out_dput; |
| } |
| |
| fd = get_unused_fd_flags(0); |
| if (fd < 0) { |
| error = fd; |
| goto out_dput; |
| } |
| |
| path.mnt = parfilp->f_path.mnt; |
| path.dentry = dentry; |
| filp = dentry_open(&path, hreq->oflags, cred); |
| dput(dentry); |
| if (IS_ERR(filp)) { |
| put_unused_fd(fd); |
| return PTR_ERR(filp); |
| } |
| |
| if (S_ISREG(inode->i_mode)) { |
| filp->f_flags |= O_NOATIME; |
| filp->f_mode |= FMODE_NOCMTIME; |
| } |
| |
| fd_install(fd, filp); |
| return fd; |
| |
| out_dput: |
| dput(dentry); |
| return error; |
| } |
| |
| 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 -EPERM; |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| /* Restrict this handle operation to symlinks only. */ |
| if (!d_is_symlink(dentry)) { |
| error = -EINVAL; |
| goto out_dput; |
| } |
| |
| if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { |
| error = -EFAULT; |
| goto out_dput; |
| } |
| |
| link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
| if (!link) { |
| error = -ENOMEM; |
| goto out_dput; |
| } |
| |
| error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
| if (error) |
| goto out_kfree; |
| error = readlink_copy(hreq->ohandle, olen, link); |
| if (error) |
| goto out_kfree; |
| |
| out_kfree: |
| kfree(link); |
| out_dput: |
| dput(dentry); |
| return error; |
| } |
| |
| int |
| xfs_set_dmattrs( |
| xfs_inode_t *ip, |
| u_int evmask, |
| u_int16_t state) |
| { |
| xfs_mount_t *mp = ip->i_mount; |
| xfs_trans_t *tp; |
| int error; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return -EIO; |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); |
| error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
| if (error) { |
| xfs_trans_cancel(tp, 0); |
| return error; |
| } |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| |
| ip->i_d.di_dmevmask = evmask; |
| ip->i_d.di_dmstate = state; |
| |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| error = xfs_trans_commit(tp, 0); |
| |
| 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 -EPERM; |
| if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(parfilp); |
| if (error) |
| return error; |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); |
| if (IS_ERR(dentry)) { |
| mnt_drop_write_file(parfilp); |
| return PTR_ERR(dentry); |
| } |
| |
| if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { |
| error = -EPERM; |
| goto out; |
| } |
| |
| if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| error = -EFAULT; |
| goto out; |
| } |
| |
| error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, |
| fsd.fsd_dmstate); |
| |
| out: |
| mnt_drop_write_file(parfilp); |
| 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 -EPERM; |
| if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| return -EFAULT; |
| if (al_hreq.buflen < sizeof(struct attrlist) || |
| al_hreq.buflen > XATTR_LIST_MAX) |
| return -EINVAL; |
| |
| /* |
| * Reject flags, only allow namespaces. |
| */ |
| if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) |
| return -EINVAL; |
| |
| dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); |
| if (IS_ERR(dentry)) |
| return PTR_ERR(dentry); |
| |
| kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); |
| if (!kbuf) |
| goto out_dput; |
| |
| cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| error = xfs_attr_list(XFS_I(d_inode(dentry)), 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: |
| kmem_free(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 = kmem_zalloc_large(*len, KM_SLEEP); |
| 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: |
| kmem_free(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; |
| |
| 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); |
| |
| return xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
| } |
| |
| 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 -EPERM; |
| if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| return -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; |
| } |
| |
| error = -ENOMEM; |
| 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( |
| d_inode(dentry), 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_file(parfilp); |
| if (ops[i].am_error) |
| break; |
| ops[i].am_error = xfs_attrmulti_attr_set( |
| d_inode(dentry), attr_name, |
| ops[i].am_attrvalue, ops[i].am_length, |
| ops[i].am_flags); |
| mnt_drop_write_file(parfilp); |
| break; |
| case ATTR_OP_REMOVE: |
| ops[i].am_error = mnt_want_write_file(parfilp); |
| if (ops[i].am_error) |
| break; |
| ops[i].am_error = xfs_attrmulti_attr_remove( |
| d_inode(dentry), attr_name, |
| ops[i].am_flags); |
| mnt_drop_write_file(parfilp); |
| break; |
| default: |
| ops[i].am_error = -EINVAL; |
| } |
| } |
| |
| if (copy_to_user(am_hreq.ops, ops, size)) |
| 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) |
| { |
| struct iattr iattr; |
| enum xfs_prealloc_flags flags = 0; |
| uint iolock = XFS_IOLOCK_EXCL; |
| 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 -EPERM; |
| |
| if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
| return -EPERM; |
| |
| if (!(filp->f_mode & FMODE_WRITE)) |
| return -EBADF; |
| |
| if (!S_ISREG(inode->i_mode)) |
| return -EINVAL; |
| |
| if (filp->f_flags & O_DSYNC) |
| flags |= XFS_PREALLOC_SYNC; |
| if (ioflags & XFS_IO_INVIS) |
| flags |= XFS_PREALLOC_INVISIBLE; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| |
| xfs_ilock(ip, iolock); |
| error = xfs_break_layouts(inode, &iolock, false); |
| if (error) |
| goto out_unlock; |
| |
| xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
| iolock |= XFS_MMAPLOCK_EXCL; |
| |
| switch (bf->l_whence) { |
| case 0: /*SEEK_SET*/ |
| break; |
| case 1: /*SEEK_CUR*/ |
| bf->l_start += filp->f_pos; |
| break; |
| case 2: /*SEEK_END*/ |
| bf->l_start += XFS_ISIZE(ip); |
| break; |
| default: |
| error = -EINVAL; |
| goto out_unlock; |
| } |
| |
| /* |
| * length of <= 0 for resv/unresv/zero is invalid. length for |
| * alloc/free is ignored completely and we have no idea what userspace |
| * might have set it to, so set it to zero to allow range |
| * checks to pass. |
| */ |
| switch (cmd) { |
| case XFS_IOC_ZERO_RANGE: |
| case XFS_IOC_RESVSP: |
| case XFS_IOC_RESVSP64: |
| case XFS_IOC_UNRESVSP: |
| case XFS_IOC_UNRESVSP64: |
| if (bf->l_len <= 0) { |
| error = -EINVAL; |
| goto out_unlock; |
| } |
| break; |
| default: |
| bf->l_len = 0; |
| break; |
| } |
| |
| if (bf->l_start < 0 || |
| bf->l_start > inode->i_sb->s_maxbytes || |
| bf->l_start + bf->l_len < 0 || |
| bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { |
| error = -EINVAL; |
| goto out_unlock; |
| } |
| |
| switch (cmd) { |
| case XFS_IOC_ZERO_RANGE: |
| flags |= XFS_PREALLOC_SET; |
| error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); |
| break; |
| case XFS_IOC_RESVSP: |
| case XFS_IOC_RESVSP64: |
| flags |= XFS_PREALLOC_SET; |
| error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, |
| XFS_BMAPI_PREALLOC); |
| break; |
| case XFS_IOC_UNRESVSP: |
| case XFS_IOC_UNRESVSP64: |
| error = xfs_free_file_space(ip, bf->l_start, bf->l_len); |
| break; |
| case XFS_IOC_ALLOCSP: |
| case XFS_IOC_ALLOCSP64: |
| case XFS_IOC_FREESP: |
| case XFS_IOC_FREESP64: |
| flags |= XFS_PREALLOC_CLEAR; |
| if (bf->l_start > XFS_ISIZE(ip)) { |
| error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), |
| bf->l_start - XFS_ISIZE(ip), 0); |
| if (error) |
| goto out_unlock; |
| } |
| |
| iattr.ia_valid = ATTR_SIZE; |
| iattr.ia_size = bf->l_start; |
| |
| error = xfs_vn_setattr_size(filp->f_path.dentry, &iattr); |
| break; |
| default: |
| ASSERT(0); |
| error = -EINVAL; |
| } |
| |
| if (error) |
| goto out_unlock; |
| |
| error = xfs_update_prealloc_flags(ip, flags); |
| |
| out_unlock: |
| xfs_iunlock(ip, iolock); |
| mnt_drop_write_file(filp); |
| 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 -EIO; |
| |
| if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| return -EFAULT; |
| |
| if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| return -EFAULT; |
| |
| if ((count = bulkreq.icount) <= 0) |
| return -EINVAL; |
| |
| if (bulkreq.ubuffer == NULL) |
| return -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_one(mp, inlast, bulkreq.ubuffer, |
| sizeof(xfs_bstat_t), NULL, &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 -EFAULT; |
| |
| if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| return -EFAULT; |
| } |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioc_fsgeometry_v1( |
| xfs_mount_t *mp, |
| void __user *arg) |
| { |
| xfs_fsop_geom_t fsgeo; |
| int error; |
| |
| error = xfs_fs_geometry(mp, &fsgeo, 3); |
| if (error) |
| return error; |
| |
| /* |
| * Caller should have passed an argument of type |
| * xfs_fsop_geom_v1_t. This is a proper subset of the |
| * xfs_fsop_geom_t that xfs_fs_geometry() fills in. |
| */ |
| if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) |
| return -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 -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; |
| |
| memset(&fa, 0, sizeof(struct fsxattr)); |
| |
| 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 = xfs_get_projid(ip); |
| |
| 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_NODEFRAG) |
| di_flags |= XFS_DIFLAG_NODEFRAG; |
| if (xflags & XFS_XFLAG_FILESTREAM) |
| di_flags |= XFS_DIFLAG_FILESTREAM; |
| if (S_ISDIR(ip->i_d.di_mode)) { |
| 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; |
| if (xflags & XFS_XFLAG_PROJINHERIT) |
| di_flags |= XFS_DIFLAG_PROJINHERIT; |
| } else if (S_ISREG(ip->i_d.di_mode)) { |
| 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; |
| } |
| |
| static int |
| xfs_ioctl_setattr_xflags( |
| struct xfs_trans *tp, |
| struct xfs_inode *ip, |
| struct fsxattr *fa) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| |
| /* 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)) |
| return -EINVAL; |
| |
| /* If realtime flag is set then must have realtime device */ |
| 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)) |
| return -EINVAL; |
| } |
| |
| /* |
| * 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)) |
| return -EPERM; |
| |
| xfs_set_diflags(ip, fa->fsx_xflags); |
| xfs_diflags_to_linux(ip); |
| xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
| xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| XFS_STATS_INC(xs_ig_attrchg); |
| return 0; |
| } |
| |
| /* |
| * Set up the transaction structure for the setattr operation, checking that we |
| * have permission to do so. On success, return a clean transaction and the |
| * inode locked exclusively ready for further operation specific checks. On |
| * failure, return an error without modifying or locking the inode. |
| */ |
| static struct xfs_trans * |
| xfs_ioctl_setattr_get_trans( |
| struct xfs_inode *ip) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_trans *tp; |
| int error; |
| |
| if (mp->m_flags & XFS_MOUNT_RDONLY) |
| return ERR_PTR(-EROFS); |
| if (XFS_FORCED_SHUTDOWN(mp)) |
| return ERR_PTR(-EIO); |
| |
| tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
| if (error) |
| goto out_cancel; |
| |
| xfs_ilock(ip, XFS_ILOCK_EXCL); |
| xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| |
| /* |
| * 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 (!inode_owner_or_capable(VFS_I(ip))) { |
| error = -EPERM; |
| goto out_cancel; |
| } |
| |
| if (mp->m_flags & XFS_MOUNT_WSYNC) |
| xfs_trans_set_sync(tp); |
| |
| return tp; |
| |
| out_cancel: |
| xfs_trans_cancel(tp, 0); |
| return ERR_PTR(error); |
| } |
| |
| /* |
| * extent size hint validation is somewhat cumbersome. Rules are: |
| * |
| * 1. extent size hint is only valid for directories and regular files |
| * 2. XFS_XFLAG_EXTSIZE is only valid for regular files |
| * 3. XFS_XFLAG_EXTSZINHERIT is only valid for directories. |
| * 4. can only be changed on regular files if no extents are allocated |
| * 5. can be changed on directories at any time |
| * 6. extsize hint of 0 turns off hints, clears inode flags. |
| * 7. Extent size must be a multiple of the appropriate block size. |
| * 8. for non-realtime files, the extent size hint must be limited |
| * to half the AG size to avoid alignment extending the extent beyond the |
| * limits of the AG. |
| */ |
| static int |
| xfs_ioctl_setattr_check_extsize( |
| struct xfs_inode *ip, |
| struct fsxattr *fa) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| |
| if ((fa->fsx_xflags & XFS_XFLAG_EXTSIZE) && !S_ISREG(ip->i_d.di_mode)) |
| return -EINVAL; |
| |
| if ((fa->fsx_xflags & XFS_XFLAG_EXTSZINHERIT) && |
| !S_ISDIR(ip->i_d.di_mode)) |
| return -EINVAL; |
| |
| if (S_ISREG(ip->i_d.di_mode) && ip->i_d.di_nextents && |
| ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) |
| return -EINVAL; |
| |
| if (fa->fsx_extsize != 0) { |
| xfs_extlen_t size; |
| xfs_fsblock_t extsize_fsb; |
| |
| extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); |
| if (extsize_fsb > MAXEXTLEN) |
| return -EINVAL; |
| |
| if (XFS_IS_REALTIME_INODE(ip) || |
| (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 (extsize_fsb > mp->m_sb.sb_agblocks / 2) |
| return -EINVAL; |
| } |
| |
| if (fa->fsx_extsize % size) |
| return -EINVAL; |
| } else |
| fa->fsx_xflags &= ~(XFS_XFLAG_EXTSIZE | XFS_XFLAG_EXTSZINHERIT); |
| |
| return 0; |
| } |
| |
| static int |
| xfs_ioctl_setattr_check_projid( |
| struct xfs_inode *ip, |
| struct fsxattr *fa) |
| { |
| /* Disallow 32bit project ids if projid32bit feature is not enabled. */ |
| if (fa->fsx_projid > (__uint16_t)-1 && |
| !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) |
| return -EINVAL; |
| |
| /* |
| * Project Quota ID state is only allowed to change from within the init |
| * namespace. Enforce that restriction only if we are trying to change |
| * the quota ID state. Everything else is allowed in user namespaces. |
| */ |
| if (current_user_ns() == &init_user_ns) |
| return 0; |
| |
| if (xfs_get_projid(ip) != fa->fsx_projid) |
| return -EINVAL; |
| if ((fa->fsx_xflags & XFS_XFLAG_PROJINHERIT) != |
| (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| STATIC int |
| xfs_ioctl_setattr( |
| xfs_inode_t *ip, |
| struct fsxattr *fa) |
| { |
| struct xfs_mount *mp = ip->i_mount; |
| struct xfs_trans *tp; |
| struct xfs_dquot *udqp = NULL; |
| struct xfs_dquot *pdqp = NULL; |
| struct xfs_dquot *olddquot = NULL; |
| int code; |
| |
| trace_xfs_ioctl_setattr(ip); |
| |
| code = xfs_ioctl_setattr_check_projid(ip, fa); |
| if (code) |
| return code; |
| |
| /* |
| * 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)) { |
| code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, |
| ip->i_d.di_gid, fa->fsx_projid, |
| XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); |
| if (code) |
| return code; |
| } |
| |
| tp = xfs_ioctl_setattr_get_trans(ip); |
| if (IS_ERR(tp)) { |
| code = PTR_ERR(tp); |
| goto error_free_dquots; |
| } |
| |
| |
| if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && |
| xfs_get_projid(ip) != fa->fsx_projid) { |
| code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, |
| capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); |
| if (code) /* out of quota */ |
| goto error_trans_cancel; |
| } |
| |
| code = xfs_ioctl_setattr_check_extsize(ip, fa); |
| if (code) |
| goto error_trans_cancel; |
| |
| code = xfs_ioctl_setattr_xflags(tp, ip, fa); |
| if (code) |
| goto error_trans_cancel; |
| |
| /* |
| * Change file ownership. Must be the owner or privileged. 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_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) |
| ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| |
| /* Change the ownerships and register project quota modifications */ |
| if (xfs_get_projid(ip) != fa->fsx_projid) { |
| if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { |
| olddquot = xfs_qm_vop_chown(tp, ip, |
| &ip->i_pdquot, pdqp); |
| } |
| ASSERT(ip->i_d.di_version > 1); |
| xfs_set_projid(ip, fa->fsx_projid); |
| } |
| |
| /* |
| * Only set the extent size hint if we've already determined that the |
| * extent size hint should be set on the inode. If no extent size flags |
| * are set on the inode then unconditionally clear the extent size hint. |
| */ |
| if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) |
| ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; |
| else |
| ip->i_d.di_extsize = 0; |
| |
| code = xfs_trans_commit(tp, 0); |
| |
| /* |
| * Release any dquot(s) the inode had kept before chown. |
| */ |
| xfs_qm_dqrele(olddquot); |
| xfs_qm_dqrele(udqp); |
| xfs_qm_dqrele(pdqp); |
| |
| return code; |
| |
| error_trans_cancel: |
| xfs_trans_cancel(tp, 0); |
| error_free_dquots: |
| xfs_qm_dqrele(udqp); |
| xfs_qm_dqrele(pdqp); |
| return code; |
| } |
| |
| STATIC int |
| xfs_ioc_fssetxattr( |
| xfs_inode_t *ip, |
| struct file *filp, |
| void __user *arg) |
| { |
| struct fsxattr fa; |
| int error; |
| |
| if (copy_from_user(&fa, arg, sizeof(fa))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| error = xfs_ioctl_setattr(ip, &fa); |
| mnt_drop_write_file(filp); |
| return error; |
| } |
| |
| 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( |
| struct xfs_inode *ip, |
| struct file *filp, |
| void __user *arg) |
| { |
| struct xfs_trans *tp; |
| struct fsxattr fa; |
| unsigned int 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; |
| |
| fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| |
| tp = xfs_ioctl_setattr_get_trans(ip); |
| if (IS_ERR(tp)) { |
| error = PTR_ERR(tp); |
| goto out_drop_write; |
| } |
| |
| error = xfs_ioctl_setattr_xflags(tp, ip, &fa); |
| if (error) { |
| xfs_trans_cancel(tp, 0); |
| goto out_drop_write; |
| } |
| |
| error = xfs_trans_commit(tp, 0); |
| out_drop_write: |
| mnt_drop_write_file(filp); |
| return error; |
| } |
| |
| STATIC int |
| xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) |
| { |
| struct getbmap __user *base = (struct getbmap __user *)*ap; |
| |
| /* copy only getbmap portion (not getbmapx) */ |
| if (copy_to_user(base, bmv, sizeof(struct getbmap))) |
| return -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 -EFAULT; |
| |
| if (bmx.bmv_count < 2) |
| return -EINVAL; |
| |
| bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| if (ioflags & XFS_IO_INVIS) |
| bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; |
| |
| error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, |
| (__force 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 -EFAULT; |
| return 0; |
| } |
| |
| STATIC int |
| xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) |
| { |
| struct getbmapx __user *base = (struct getbmapx __user *)*ap; |
| |
| if (copy_to_user(base, bmv, sizeof(struct getbmapx))) |
| return -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 -EFAULT; |
| |
| if (bmx.bmv_count < 2) |
| return -EINVAL; |
| |
| if (bmx.bmv_iflags & (~BMV_IF_VALID)) |
| return -EINVAL; |
| |
| error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, |
| (__force struct getbmapx *)arg+1); |
| if (error) |
| return error; |
| |
| /* copy back header */ |
| if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| int |
| xfs_ioc_swapext( |
| xfs_swapext_t *sxp) |
| { |
| xfs_inode_t *ip, *tip; |
| struct fd f, tmp; |
| int error = 0; |
| |
| /* Pull information for the target fd */ |
| f = fdget((int)sxp->sx_fdtarget); |
| if (!f.file) { |
| error = -EINVAL; |
| goto out; |
| } |
| |
| if (!(f.file->f_mode & FMODE_WRITE) || |
| !(f.file->f_mode & FMODE_READ) || |
| (f.file->f_flags & O_APPEND)) { |
| error = -EBADF; |
| goto out_put_file; |
| } |
| |
| tmp = fdget((int)sxp->sx_fdtmp); |
| if (!tmp.file) { |
| error = -EINVAL; |
| goto out_put_file; |
| } |
| |
| if (!(tmp.file->f_mode & FMODE_WRITE) || |
| !(tmp.file->f_mode & FMODE_READ) || |
| (tmp.file->f_flags & O_APPEND)) { |
| error = -EBADF; |
| goto out_put_tmp_file; |
| } |
| |
| if (IS_SWAPFILE(file_inode(f.file)) || |
| IS_SWAPFILE(file_inode(tmp.file))) { |
| error = -EINVAL; |
| goto out_put_tmp_file; |
| } |
| |
| ip = XFS_I(file_inode(f.file)); |
| tip = XFS_I(file_inode(tmp.file)); |
| |
| if (ip->i_mount != tip->i_mount) { |
| error = -EINVAL; |
| goto out_put_tmp_file; |
| } |
| |
| if (ip->i_ino == tip->i_ino) { |
| error = -EINVAL; |
| goto out_put_tmp_file; |
| } |
| |
| if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| error = -EIO; |
| goto out_put_tmp_file; |
| } |
| |
| error = xfs_swap_extents(ip, tip, sxp); |
| |
| out_put_tmp_file: |
| fdput(tmp); |
| out_put_file: |
| fdput(f); |
| out: |
| return error; |
| } |
| |
| /* |
| * 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 = file_inode(filp); |
| 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 |= XFS_IO_INVIS; |
| |
| trace_xfs_file_ioctl(ip); |
| |
| switch (cmd) { |
| case FITRIM: |
| return xfs_ioc_trim(mp, arg); |
| 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: |
| case XFS_IOC_ZERO_RANGE: { |
| xfs_flock64_t bf; |
| |
| if (copy_from_user(&bf, arg, sizeof(bf))) |
| return -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 = target->bt_logical_sectorsize; |
| da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
| |
| if (copy_to_user(arg, &da, sizeof(da))) |
| return -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 -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| |
| error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
| dmi.fsd_dmstate); |
| mnt_drop_write_file(filp); |
| 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 -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 -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 -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 -EFAULT; |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| error = xfs_ioc_swapext(&sxp); |
| mnt_drop_write_file(filp); |
| 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 -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 -EROFS; |
| |
| if (copy_from_user(&inout, arg, sizeof(inout))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| |
| /* input parameter is passed in resblks field of structure */ |
| in = inout.resblks; |
| error = xfs_reserve_blocks(mp, &in, &inout); |
| mnt_drop_write_file(filp); |
| if (error) |
| return error; |
| |
| if (copy_to_user(arg, &inout, sizeof(inout))) |
| return -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 -EFAULT; |
| |
| return 0; |
| } |
| |
| case XFS_IOC_FSGROWFSDATA: { |
| xfs_growfs_data_t in; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| error = xfs_growfs_data(mp, &in); |
| mnt_drop_write_file(filp); |
| return error; |
| } |
| |
| case XFS_IOC_FSGROWFSLOG: { |
| xfs_growfs_log_t in; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| error = xfs_growfs_log(mp, &in); |
| mnt_drop_write_file(filp); |
| return error; |
| } |
| |
| case XFS_IOC_FSGROWFSRT: { |
| xfs_growfs_rt_t in; |
| |
| if (copy_from_user(&in, arg, sizeof(in))) |
| return -EFAULT; |
| |
| error = mnt_want_write_file(filp); |
| if (error) |
| return error; |
| error = xfs_growfs_rt(mp, &in); |
| mnt_drop_write_file(filp); |
| 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 -EFAULT; |
| |
| return xfs_fs_goingdown(mp, in); |
| } |
| |
| 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 -EFAULT; |
| |
| return xfs_errortag_add(in.errtag, mp); |
| } |
| |
| case XFS_IOC_ERROR_CLEARALL: |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| return xfs_errortag_clearall(mp, 1); |
| |
| case XFS_IOC_FREE_EOFBLOCKS: { |
| struct xfs_fs_eofblocks eofb; |
| struct xfs_eofblocks keofb; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EPERM; |
| |
| if (mp->m_flags & XFS_MOUNT_RDONLY) |
| return -EROFS; |
| |
| if (copy_from_user(&eofb, arg, sizeof(eofb))) |
| return -EFAULT; |
| |
| error = xfs_fs_eofblocks_from_user(&eofb, &keofb); |
| if (error) |
| return error; |
| |
| return xfs_icache_free_eofblocks(mp, &keofb); |
| } |
| |
| default: |
| return -ENOTTY; |
| } |
| } |