/fs/xfs/xfs_ioctl.c
C | 2114 lines | 1577 code | 330 blank | 207 comment | 329 complexity | 45ce01e4f9613b6ca56f5ed02c85898b MD5 | raw file
Possible License(s): GPL-2.0, LGPL-2.0, AGPL-1.0
- /*
- * 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 "xfs_acl.h"
- #include "xfs_btree.h"
- #include <linux/fsmap.h>
- #include "xfs_fsmap.h"
- #include "scrub/xfs_scrub.h"
- #include <linux/capability.h>
- #include <linux/cred.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 = inode->i_generation;
- handle.ha_fid.fid_ino = ip->i_ino;
- hsize = sizeof(xfs_handle_t);
- }
- 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 = -EPERM;
- 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;
- 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;
- }
- error = vfs_readlink(dentry, hreq->ohandle, olen);
- out_dput:
- dput(dentry);
- return error;
- }
- int
- xfs_set_dmattrs(
- xfs_inode_t *ip,
- uint evmask,
- uint16_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;
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
- if (error)
- 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);
- 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;
- struct xfs_fsop_attrlist_handlereq __user *p = arg;
- 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 > XFS_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(&p->pos, cursor, sizeof(attrlist_cursor_kern_t))) {
- error = -EFAULT;
- 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 > XFS_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;
- int error;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- return -EPERM;
- if (len > XFS_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);
- if (!error)
- xfs_forget_acl(inode, name, flags);
- kfree(kbuf);
- return error;
- }
- int
- xfs_attrmulti_attr_remove(
- struct inode *inode,
- unsigned char *name,
- uint32_t flags)
- {
- int error;
- if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
- return -EPERM;
- error = xfs_attr_remove(XFS_I(inode), name, flags);
- if (!error)
- xfs_forget_acl(inode, name, flags);
- return error;
- }
- 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 file *filp,
- unsigned int cmd,
- xfs_flock64_t *bf)
- {
- struct inode *inode = file_inode(filp);
- struct xfs_inode *ip = XFS_I(inode);
- 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 (filp->f_mode & FMODE_NOCMTIME)
- flags |= XFS_PREALLOC_INVISIBLE;
- error = mnt_want_write_file(filp);
- if (error)
- return error;
- xfs_ilock(ip, iolock);
- error = xfs_break_layouts(inode, &iolock);
- 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(file_dentry(filp), &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 |= FS_XFLAG_IMMUTABLE;
- else
- xflags &= ~FS_XFLAG_IMMUTABLE;
- if (flags & FS_APPEND_FL)
- xflags |= FS_XFLAG_APPEND;
- else
- xflags &= ~FS_XFLAG_APPEND;
- if (flags & FS_SYNC_FL)
- xflags |= FS_XFLAG_SYNC;
- else
- xflags &= ~FS_XFLAG_SYNC;
- if (flags & FS_NOATIME_FL)
- xflags |= FS_XFLAG_NOATIME;
- else
- xflags &= ~FS_XFLAG_NOATIME;
- if (flags & FS_NODUMP_FL)
- xflags |= FS_XFLAG_NODUMP;
- else
- xflags &= ~FS_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_cowextsize = ip->i_d.di_cowextsize <<
- 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 = xfs_iext_count(ip->i_afp);
- 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 = xfs_iext_count(&ip->i_df);
- 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 uint16_t
- xfs_flags2diflags(
- struct xfs_inode *ip,
- unsigned int xflags)
- {
- /* can't set PREALLOC this way, just preserve it */
- uint16_t di_flags =
- (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC);
- if (xflags & FS_XFLAG_IMMUTABLE)
- di_flags |= XFS_DIFLAG_IMMUTABLE;
- if (xflags & FS_XFLAG_APPEND)
- di_flags |= XFS_DIFLAG_APPEND;
- if (xflags & FS_XFLAG_SYNC)
- di_flags |= XFS_DIFLAG_SYNC;
- if (xflags & FS_XFLAG_NOATIME)
- di_flags |= XFS_DIFLAG_NOATIME;
- if (xflags & FS_XFLAG_NODUMP)
- di_flags |= XFS_DIFLAG_NODUMP;
- if (xflags & FS_XFLAG_NODEFRAG)
- di_flags |= XFS_DIFLAG_NODEFRAG;
- if (xflags & FS_XFLAG_FILESTREAM)
- di_flags |= XFS_DIFLAG_FILESTREAM;
- if (S_ISDIR(VFS_I(ip)->i_mode)) {
- if (xflags & FS_XFLAG_RTINHERIT)
- di_flags |= XFS_DIFLAG_RTINHERIT;
- if (xflags & FS_XFLAG_NOSYMLINKS)
- di_flags |= XFS_DIFLAG_NOSYMLINKS;
- if (xflags & FS_XFLAG_EXTSZINHERIT)
- di_flags |= XFS_DIFLAG_EXTSZINHERIT;
- if (xflags & FS_XFLAG_PROJINHERIT)
- di_flags |= XFS_DIFLAG_PROJINHERIT;
- } else if (S_ISREG(VFS_I(ip)->i_mode)) {
- if (xflags & FS_XFLAG_REALTIME)
- di_flags |= XFS_DIFLAG_REALTIME;
- if (xflags & FS_XFLAG_EXTSIZE)
- di_flags |= XFS_DIFLAG_EXTSIZE;
- }
- return di_flags;
- }
- STATIC uint64_t
- xfs_flags2diflags2(
- struct xfs_inode *ip,
- unsigned int xflags)
- {
- uint64_t di_flags2 =
- (ip->i_d.di_flags2 & XFS_DIFLAG2_REFLINK);
- if (xflags & FS_XFLAG_DAX)
- di_flags2 |= XFS_DIFLAG2_DAX;
- if (xflags & FS_XFLAG_COWEXTSIZE)
- di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
- return di_flags2;
- }
- STATIC void
- xfs_diflags_to_linux(
- struct xfs_inode *ip)
- {
- struct inode *inode = VFS_I(ip);
- unsigned int xflags = xfs_ip2xflags(ip);
- if (xflags & FS_XFLAG_IMMUTABLE)
- inode->i_flags |= S_IMMUTABLE;
- else
- inode->i_flags &= ~S_IMMUTABLE;
- if (xflags & FS_XFLAG_APPEND)
- inode->i_flags |= S_APPEND;
- else
- inode->i_flags &= ~S_APPEND;
- if (xflags & FS_XFLAG_SYNC)
- inode->i_flags |= S_SYNC;
- else
- inode->i_flags &= ~S_SYNC;
- if (xflags & FS_XFLAG_NOATIME)
- inode->i_flags |= S_NOATIME;
- else
- inode->i_flags &= ~S_NOATIME;
- #if 0 /* disabled until the flag switching races are sorted out */
- if (xflags & FS_XFLAG_DAX)
- inode->i_flags |= S_DAX;
- else
- inode->i_flags &= ~S_DAX;
- #endif
- }
- static int
- xfs_ioctl_setattr_xflags(
- struct xfs_trans *tp,
- struct xfs_inode *ip,
- struct fsxattr *fa)
- {
- struct xfs_mount *mp = ip->i_mount;
- uint64_t di_flags2;
- /* 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 & FS_XFLAG_REALTIME))
- return -EINVAL;
- /* If realtime flag is set then must have realtime device */
- if (fa->fsx_xflags & FS_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;
- }
- /* Clear reflink if we are actually able to set the rt flag. */
- if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
- ip->i_d.di_flags2 &= ~XFS_DIFLAG2_REFLINK;
- /* Don't allow us to set DAX mode for a reflinked file for now. */
- if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
- 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 & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
- !capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
- /* diflags2 only valid for v3 inodes. */
- di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
- if (di_flags2 && ip->i_d.di_version < 3)
- return -EINVAL;
- ip->i_d.di_flags = xfs_flags2diflags(ip, fa->fsx_xflags);
- ip->i_d.di_flags2 = di_flags2;
- 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(mp, xs_ig_attrchg);
- return 0;
- }
- /*
- * If we are changing DAX flags, we have to ensure the file is clean and any
- * cached objects in the address space are invalidated and removed. This
- * requires us to lock out other IO and page faults similar to a truncate
- * operation. The locks need to be held until the transaction has been committed
- * so that the cache invalidation is atomic with respect to the DAX flag
- * manipulation.
- */
- static int
- xfs_ioctl_setattr_dax_invalidate(
- struct xfs_inode *ip,
- struct fsxattr *fa,
- int *join_flags)
- {
- struct inode *inode = VFS_I(ip);
- struct super_block *sb = inode->i_sb;
- int error;
- *join_flags = 0;
- /*
- * It is only valid to set the DAX flag on regular files and
- * directories on filesystems where the block size is equal to the page
- * size. On directories it serves as an inherit hint.
- */
- if (fa->fsx_xflags & FS_XFLAG_DAX) {
- if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
- return -EINVAL;
- if (bdev_dax_supported(sb, sb->s_blocksize) < 0)
- return -EINVAL;
- }
- /* If the DAX state is not changing, we have nothing to do here. */
- if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode))
- return 0;
- if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode))
- return 0;
- /* lock, flush and invalidate mapping in preparation for flag change */
- xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
- error = filemap_write_and_wait(inode->i_mapping);
- if (error)
- goto out_unlock;
- error = invalidate_inode_pages2(inode->i_mapping);
- if (error)
- goto out_unlock;
- *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL;
- return 0;
- out_unlock:
- xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL);
- return error;
- }
- /*
- * 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.
- *
- * The inode might already be IO locked on call. If this is the case, it is
- * indicated in @join_flags and we take full responsibility for ensuring they
- * are unlocked from now on. Hence if we have an error here, we still have to
- * unlock them. Otherwise, once they are joined to the transaction, they will
- * be unlocked on commit/cancel.
- */
- static struct xfs_trans *
- xfs_ioctl_setattr_get_trans(
- struct xfs_inode *ip,
- int join_flags)
- {
- struct xfs_mount *mp = ip->i_mount;
- struct xfs_trans *tp;
- int error = -EROFS;
- if (mp->m_flags & XFS_MOUNT_RDONLY)
- goto out_unlock;
- error = -EIO;
- if (XFS_FORCED_SHUTDOWN(mp))
- goto out_unlock;
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
- if (error)
- return ERR_PTR(error);
- xfs_ilock(ip, XFS_ILOCK_EXCL);
- xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
- join_flags = 0;
- /*
- * 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);
- out_unlock:
- if (join_flags)
- xfs_iunlock(ip, join_flags);
- 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. FS_XFLAG_EXTSIZE is only valid for regular files
- * 3. FS_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.
- *
- * Please keep this function in sync with xfs_scrub_inode_extsize.
- */
- 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 & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
- return -EINVAL;
- if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
- !S_ISDIR(VFS_I(ip)->i_mode))
- return -EINVAL;
- if (S_ISREG(VFS_I(ip)->i_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 & FS_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 &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
- return 0;
- }
- /*
- * CoW extent size hint validation rules are:
- *
- * 1. CoW extent size hint can only be set if reflink is enabled on the fs.
- * The inode does not have to have any shared blocks, but it must be a v3.
- * 2. FS_XFLAG_COWEXTSIZE is only valid for directories and regular files;
- * for a directory, the hint is propagated to new files.
- * 3. Can be changed on files & directories at any time.
- * 4. CoW extsize hint of 0 turns off hints, clears inode flags.
- * 5. Extent size must be a multiple of the appropriate block size.
- * 6. The extent size hint must be limited to half the AG size to avoid
- * alignment extending the extent beyond the limits of the AG.
- *
- * Please keep this function in sync with xfs_scrub_inode_cowextsize.
- */
- static int
- xfs_ioctl_setattr_check_cowextsize(
- struct xfs_inode *ip,
- struct fsxattr *fa)
- {
- struct xfs_mount *mp = ip->i_mount;
- if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
- return 0;
- if (!xfs_sb_version_hasreflink(&ip->i_mount->m_sb) ||
- ip->i_d.di_version != 3)
- return -EINVAL;
- if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
- return -EINVAL;
- if (fa->fsx_cowextsize != 0) {
- xfs_extlen_t size;
- xfs_fsblock_t cowextsize_fsb;
- cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
- if (cowextsize_fsb > MAXEXTLEN)
- return -EINVAL;
- size = mp->m_sb.sb_blocksize;
- if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
- return -EINVAL;
- if (fa->fsx_cowextsize % size)
- return -EINVAL;
- } else
- fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
- 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 & FS_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;
- int join_flags = 0;
- 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;
- }
- /*
- * Changing DAX config may require inode locking for mapping
- * invalidation. These need to be held all the way to transaction commit
- * or cancel time, so need to be passed through to
- * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
- * appropriately.
- */
- code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags);
- if (code)
- goto error_free_dquots;
- tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
- 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_check_cowextsize(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 ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
- !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID))
- VFS_I(ip)->i_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;
- if (ip->i_d.di_version == 3 &&
- (ip->i_d.di_flags2 & XFS_DIFLAG2_COWEXTSIZE))
- ip->i_d.di_cowextsize = fa->fsx_cowextsize >>
- mp->m_sb.sb_blocklog;
- else
- ip->i_d.di_cowextsize = 0;
- code = xfs_trans_commit(tp);
- /*
- * 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);
- 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 join_flags = 0;
- 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;
- /*
- * Changing DAX config may require inode locking for mapping
- * invalidation. These need to be held all the way to transaction commit
- * or cancel time, so need to be passed through to
- * xfs_ioctl_setattr_get_trans() so it can apply them to the join call
- * appropriately.
- */
- error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags);
- if (error)
- goto out_drop_write;
- tp = xfs_ioctl_setattr_get_trans(ip, join_flags);
- 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);
- goto out_drop_write;
- }
- error = xfs_trans_commit(tp);
- out_drop_write:
- mnt_drop_write_file(filp);
- return error;
- }
- static bool
- xfs_getbmap_format(
- struct kgetbmap *p,
- struct getbmapx __user *u,
- size_t recsize)
- {
- if (put_user(p->bmv_offset, &u->bmv_offset) ||
- put_user(p->bmv_block, &u->bmv_block) ||
- put_user(p->bmv_length, &u->bmv_length) ||
- put_user(0, &u->bmv_count) ||
- put_user(0, &u->bmv_entries))
- return false;
- if (recsize < sizeof(struct getbmapx))
- return true;
- if (put_user(0, &u->bmv_iflags) ||
- put_user(p->bmv_oflags, &u->bmv_oflags) ||
- put_user(0, &u->bmv_unused1) ||
- put_user(0, &u->bmv_unused2))
- return false;
- return true;
- }
- STATIC int
- xfs_ioc_getbmap(
- struct file *file,
- unsigned int cmd,
- void __user *arg)
- {
- struct getbmapx bmx = { 0 };
- struct kgetbmap *buf;
- size_t recsize;
- int error, i;
- switch (cmd) {
- case XFS_IOC_GETBMAPA:
- bmx.bmv_iflags = BMV_IF_ATTRFORK;
- /*FALLTHRU*/
- case XFS_IOC_GETBMAP:
- if (file->f_mode & FMODE_NOCMTIME)
- bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ;
- /* struct getbmap is a strict subset of struct getbmapx. */
- recsize = sizeof(struct getbmap);
- break;
- case XFS_IOC_GETBMAPX:
- recsize = sizeof(struct getbmapx);
- break;
- default:
- return -EINVAL;
- }
- if (copy_from_user(&bmx, arg, recsize))
- return -EFAULT;
- if (bmx.bmv_count < 2)
- return -EINVAL;
- if (bmx.bmv_count > ULONG_MAX / recsize)
- return -ENOMEM;
- buf = kmem_zalloc_large(bmx.bmv_count * sizeof(*buf), 0);
- if (!buf)
- return -ENOMEM;
- error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
- if (error)
- goto out_free_buf;
- error = -EFAULT;
- if (copy_to_user(arg, &bmx, recsize))
- goto out_free_buf;
- arg += recsize;
- for (i = 0; i < bmx.bmv_entries; i++) {
- if (!xfs_getbmap_format(buf + i, arg, recsize))
- goto out_free_buf;
- arg += recsize;
- }
- error = 0;
- out_free_buf:
- kmem_free(buf);
- return 0;
- }
- struct getfsmap_info {
- struct xfs_mount *mp;
- struct fsmap_head __user *data;
- unsigned int idx;
- __u32 last_flags;
- };
- STATIC int
- xfs_getfsmap_format(struct xfs_fsmap *xfm, void *priv)
- {
- struct getfsmap_info *info = priv;
- struct fsmap fm;
- trace_xfs_getfsmap_mapping(info->mp, xfm);
- info->last_flags = xfm->fmr_flags;
- xfs_fsmap_from_internal(&fm, xfm);
- if (copy_to_user(&info->data->fmh_recs[info->idx++], &fm,
- sizeof(struct fsmap)))
- return -EFAULT;
- return 0;
- }
- STATIC int
- xfs_ioc_getfsmap(
- struct xfs_inode *ip,
- struct fsmap_head __user *arg)
- {
- struct getfsmap_info info = { NULL };
- struct xfs_fsmap_head xhead = {0};
- struct fsmap_head head;
- bool aborted = false;
- int error;
- if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
- return -EFAULT;
- if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
- memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
- sizeof(head.fmh_keys[0].fmr_reserved)) ||
- memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
- sizeof(head.fmh_keys[1].fmr_reserved)))
- return -EINVAL;
- xhead.fmh_iflags = head.fmh_iflags;
- xhead.fmh_count = head.fmh_count;
- xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
- xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
- trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
- trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
- info.mp = ip->i_mount;
- info.data = arg;
- error = xfs_getfsmap(ip->i_mount, &xhead, xfs_getfsmap_format, &info);
- if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
- error = 0;
- aborted = true;
- } else if (error)
- return error;
- /* If we didn't abort, set the "last" flag in the last fmx */
- if (!aborted && info.idx) {
- info.last_flags |= FMR_OF_LAST;
- if (copy_to_user(&info.data->fmh_recs[info.idx - 1].fmr_flags,
- &info.last_flags, sizeof(info.last_flags)))
- return -EFAULT;
- }
- /* copy back header */
- head.fmh_entries = xhead.fmh_entries;
- head.fmh_oflags = xhead.fmh_oflags;
- if (copy_to_user(arg, &head, sizeof(struct fsmap_head)))
- return -EFAULT;
- return 0;
- }
- STATIC int
- xfs_ioc_scrub_metadata(
- struct xfs_inode *ip,
- void __user *arg)
- {
- struct xfs_scrub_metadata scrub;
- int error;
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- if (copy_from_user(&scrub, arg, sizeof(scrub)))
- return -EFAULT;
- error = xfs_scrub_metadata(ip, &scrub);
- if (error)
- return error;
- if (copy_to_user(arg, &scrub, sizeof(scrub)))
- 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;
- }
- /*
- * We need to ensure that the fds passed in point to XFS inodes
- * before we cast and access them as XFS structures as we have no
- * control over what the user passes us here.
- */
- if (f.file->f_op != &xfs_file_operations ||
- tmp.file->f_op != &xfs_file_operations) {
- 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 error;
- 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(filp, 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:
- case XFS_IOC_GETBMAPX:
- return xfs_ioc_getbmap(filp, cmd, arg);
- case FS_IOC_GETFSMAP:
- return xfs_ioc_getfsmap(ip, arg);
- case XFS_IOC_SCRUB_METADATA:
- return xfs_ioc_scrub_metadata(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(mp, in.errtag);
- }
- case XFS_IOC_ERROR_CLEARALL:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
- return xfs_errortag_clearall(mp);
- 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;
- }
- }