summaryrefslogtreecommitdiffstats
path: root/fs/xfs/xfs_ioctl.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:49:45 +0000
commit2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch)
tree848558de17fb3008cdf4d861b01ac7781903ce39 /fs/xfs/xfs_ioctl.c
parentInitial commit. (diff)
downloadlinux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz
linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/xfs/xfs_ioctl.c')
-rw-r--r--fs/xfs/xfs_ioctl.c2159
1 files changed, 2159 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
new file mode 100644
index 000000000..1f783e979
--- /dev/null
+++ b/fs/xfs/xfs_ioctl.c
@@ -0,0 +1,2159 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2000-2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ */
+#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_rtalloc.h"
+#include "xfs_iwalk.h"
+#include "xfs_itable.h"
+#include "xfs_error.h"
+#include "xfs_da_format.h"
+#include "xfs_da_btree.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_trans.h"
+#include "xfs_acl.h"
+#include "xfs_btree.h"
+#include <linux/fsmap.h>
+#include "xfs_fsmap.h"
+#include "scrub/xfs_scrub.h"
+#include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_health.h"
+#include "xfs_reflink.h"
+#include "xfs_ioctl.h"
+#include "xfs_xattr.h"
+
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/fileattr.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_path_at(AT_FDCWD, hreq->path, 0, &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;
+}
+
+/*
+ * Format an attribute and copy it out to the user's buffer.
+ * Take care to check values and protect against them changing later,
+ * we may be reading them directly out of a user buffer.
+ */
+static void
+xfs_ioc_attr_put_listent(
+ struct xfs_attr_list_context *context,
+ int flags,
+ unsigned char *name,
+ int namelen,
+ int valuelen)
+{
+ struct xfs_attrlist *alist = context->buffer;
+ struct xfs_attrlist_ent *aep;
+ int arraytop;
+
+ ASSERT(!context->seen_enough);
+ ASSERT(context->count >= 0);
+ ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
+ ASSERT(context->firstu >= sizeof(*alist));
+ ASSERT(context->firstu <= context->bufsize);
+
+ /*
+ * Only list entries in the right namespace.
+ */
+ if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
+ return;
+
+ arraytop = sizeof(*alist) +
+ context->count * sizeof(alist->al_offset[0]);
+
+ /* decrement by the actual bytes used by the attr */
+ context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
+ namelen + 1, sizeof(uint32_t));
+ if (context->firstu < arraytop) {
+ trace_xfs_attr_list_full(context);
+ alist->al_more = 1;
+ context->seen_enough = 1;
+ return;
+ }
+
+ aep = context->buffer + context->firstu;
+ aep->a_valuelen = valuelen;
+ memcpy(aep->a_name, name, namelen);
+ aep->a_name[namelen] = 0;
+ alist->al_offset[context->count++] = context->firstu;
+ alist->al_count = context->count;
+ trace_xfs_attr_list_add(context);
+}
+
+static unsigned int
+xfs_attr_filter(
+ u32 ioc_flags)
+{
+ if (ioc_flags & XFS_IOC_ATTR_ROOT)
+ return XFS_ATTR_ROOT;
+ if (ioc_flags & XFS_IOC_ATTR_SECURE)
+ return XFS_ATTR_SECURE;
+ return 0;
+}
+
+static unsigned int
+xfs_attr_flags(
+ u32 ioc_flags)
+{
+ if (ioc_flags & XFS_IOC_ATTR_CREATE)
+ return XATTR_CREATE;
+ if (ioc_flags & XFS_IOC_ATTR_REPLACE)
+ return XATTR_REPLACE;
+ return 0;
+}
+
+int
+xfs_ioc_attr_list(
+ struct xfs_inode *dp,
+ void __user *ubuf,
+ size_t bufsize,
+ int flags,
+ struct xfs_attrlist_cursor __user *ucursor)
+{
+ struct xfs_attr_list_context context = { };
+ struct xfs_attrlist *alist;
+ void *buffer;
+ int error;
+
+ if (bufsize < sizeof(struct xfs_attrlist) ||
+ bufsize > XFS_XATTR_LIST_MAX)
+ return -EINVAL;
+
+ /*
+ * Reject flags, only allow namespaces.
+ */
+ if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
+ return -EINVAL;
+ if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
+ return -EINVAL;
+
+ /*
+ * Validate the cursor.
+ */
+ if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
+ return -EFAULT;
+ if (context.cursor.pad1 || context.cursor.pad2)
+ return -EINVAL;
+ if (!context.cursor.initted &&
+ (context.cursor.hashval || context.cursor.blkno ||
+ context.cursor.offset))
+ return -EINVAL;
+
+ buffer = kvzalloc(bufsize, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ /*
+ * Initialize the output buffer.
+ */
+ context.dp = dp;
+ context.resynch = 1;
+ context.attr_filter = xfs_attr_filter(flags);
+ context.buffer = buffer;
+ context.bufsize = round_down(bufsize, sizeof(uint32_t));
+ context.firstu = context.bufsize;
+ context.put_listent = xfs_ioc_attr_put_listent;
+
+ alist = context.buffer;
+ alist->al_count = 0;
+ alist->al_more = 0;
+ alist->al_offset[0] = context.bufsize;
+
+ error = xfs_attr_list(&context);
+ if (error)
+ goto out_free;
+
+ if (copy_to_user(ubuf, buffer, bufsize) ||
+ copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
+ error = -EFAULT;
+out_free:
+ kmem_free(buffer);
+ return error;
+}
+
+STATIC int
+xfs_attrlist_by_handle(
+ struct file *parfilp,
+ struct xfs_fsop_attrlist_handlereq __user *p)
+{
+ struct xfs_fsop_attrlist_handlereq al_hreq;
+ struct dentry *dentry;
+ int error = -ENOMEM;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
+ return -EFAULT;
+
+ dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
+ if (IS_ERR(dentry))
+ return PTR_ERR(dentry);
+
+ error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
+ al_hreq.buflen, al_hreq.flags, &p->pos);
+ dput(dentry);
+ return error;
+}
+
+static int
+xfs_attrmulti_attr_get(
+ struct inode *inode,
+ unsigned char *name,
+ unsigned char __user *ubuf,
+ uint32_t *len,
+ uint32_t flags)
+{
+ struct xfs_da_args args = {
+ .dp = XFS_I(inode),
+ .attr_filter = xfs_attr_filter(flags),
+ .attr_flags = xfs_attr_flags(flags),
+ .name = name,
+ .namelen = strlen(name),
+ .valuelen = *len,
+ };
+ int error;
+
+ if (*len > XFS_XATTR_SIZE_MAX)
+ return -EINVAL;
+
+ error = xfs_attr_get(&args);
+ if (error)
+ goto out_kfree;
+
+ *len = args.valuelen;
+ if (copy_to_user(ubuf, args.value, args.valuelen))
+ error = -EFAULT;
+
+out_kfree:
+ kmem_free(args.value);
+ return error;
+}
+
+static int
+xfs_attrmulti_attr_set(
+ struct inode *inode,
+ unsigned char *name,
+ const unsigned char __user *ubuf,
+ uint32_t len,
+ uint32_t flags)
+{
+ struct xfs_da_args args = {
+ .dp = XFS_I(inode),
+ .attr_filter = xfs_attr_filter(flags),
+ .attr_flags = xfs_attr_flags(flags),
+ .name = name,
+ .namelen = strlen(name),
+ };
+ int error;
+
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return -EPERM;
+
+ if (ubuf) {
+ if (len > XFS_XATTR_SIZE_MAX)
+ return -EINVAL;
+ args.value = memdup_user(ubuf, len);
+ if (IS_ERR(args.value))
+ return PTR_ERR(args.value);
+ args.valuelen = len;
+ }
+
+ error = xfs_attr_change(&args);
+ if (!error && (flags & XFS_IOC_ATTR_ROOT))
+ xfs_forget_acl(inode, name);
+ kfree(args.value);
+ return error;
+}
+
+int
+xfs_ioc_attrmulti_one(
+ struct file *parfilp,
+ struct inode *inode,
+ uint32_t opcode,
+ void __user *uname,
+ void __user *value,
+ uint32_t *len,
+ uint32_t flags)
+{
+ unsigned char *name;
+ int error;
+
+ if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
+ return -EINVAL;
+
+ name = strndup_user(uname, MAXNAMELEN);
+ if (IS_ERR(name))
+ return PTR_ERR(name);
+
+ switch (opcode) {
+ case ATTR_OP_GET:
+ error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
+ break;
+ case ATTR_OP_REMOVE:
+ value = NULL;
+ *len = 0;
+ fallthrough;
+ case ATTR_OP_SET:
+ error = mnt_want_write_file(parfilp);
+ if (error)
+ break;
+ error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
+ mnt_drop_write_file(parfilp);
+ break;
+ default:
+ error = -EINVAL;
+ break;
+ }
+
+ kfree(name);
+ 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;
+
+ 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 = 0;
+ for (i = 0; i < am_hreq.opcount; i++) {
+ ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
+ d_inode(dentry), ops[i].am_opcode,
+ ops[i].am_attrname, ops[i].am_attrvalue,
+ &ops[i].am_length, ops[i].am_flags);
+ }
+
+ if (copy_to_user(am_hreq.ops, ops, size))
+ error = -EFAULT;
+
+ kfree(ops);
+ out_dput:
+ dput(dentry);
+ return error;
+}
+
+/* Return 0 on success or positive error */
+int
+xfs_fsbulkstat_one_fmt(
+ struct xfs_ibulk *breq,
+ const struct xfs_bulkstat *bstat)
+{
+ struct xfs_bstat bs1;
+
+ xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
+ if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
+ return -EFAULT;
+ return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
+}
+
+int
+xfs_fsinumbers_fmt(
+ struct xfs_ibulk *breq,
+ const struct xfs_inumbers *igrp)
+{
+ struct xfs_inogrp ig1;
+
+ xfs_inumbers_to_inogrp(&ig1, igrp);
+ if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
+ return -EFAULT;
+ return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
+}
+
+STATIC int
+xfs_ioc_fsbulkstat(
+ struct file *file,
+ unsigned int cmd,
+ void __user *arg)
+{
+ struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
+ struct xfs_fsop_bulkreq bulkreq;
+ struct xfs_ibulk breq = {
+ .mp = mp,
+ .mnt_userns = file_mnt_user_ns(file),
+ .ocount = 0,
+ };
+ xfs_ino_t lastino;
+ 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_is_shutdown(mp))
+ return -EIO;
+
+ if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
+ return -EFAULT;
+
+ if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
+ return -EFAULT;
+
+ if (bulkreq.icount <= 0)
+ return -EINVAL;
+
+ if (bulkreq.ubuffer == NULL)
+ return -EINVAL;
+
+ breq.ubuffer = bulkreq.ubuffer;
+ breq.icount = bulkreq.icount;
+
+ /*
+ * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
+ * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
+ * that *lastip contains either zero or the number of the last inode to
+ * be examined by the previous call and return results starting with
+ * the next inode after that. The new bulk request back end functions
+ * take the inode to start with, so we have to compute the startino
+ * parameter from lastino to maintain correct function. lastino == 0
+ * is a special case because it has traditionally meant "first inode
+ * in filesystem".
+ */
+ if (cmd == XFS_IOC_FSINUMBERS) {
+ breq.startino = lastino ? lastino + 1 : 0;
+ error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
+ lastino = breq.startino - 1;
+ } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
+ breq.startino = lastino;
+ breq.icount = 1;
+ error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
+ } else { /* XFS_IOC_FSBULKSTAT */
+ breq.startino = lastino ? lastino + 1 : 0;
+ error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
+ lastino = breq.startino - 1;
+ }
+
+ if (error)
+ return error;
+
+ if (bulkreq.lastip != NULL &&
+ copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
+ return -EFAULT;
+
+ if (bulkreq.ocount != NULL &&
+ copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
+ return -EFAULT;
+
+ return 0;
+}
+
+/* Return 0 on success or positive error */
+static int
+xfs_bulkstat_fmt(
+ struct xfs_ibulk *breq,
+ const struct xfs_bulkstat *bstat)
+{
+ if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
+ return -EFAULT;
+ return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
+}
+
+/*
+ * Check the incoming bulk request @hdr from userspace and initialize the
+ * internal @breq bulk request appropriately. Returns 0 if the bulk request
+ * should proceed; -ECANCELED if there's nothing to do; or the usual
+ * negative error code.
+ */
+static int
+xfs_bulk_ireq_setup(
+ struct xfs_mount *mp,
+ struct xfs_bulk_ireq *hdr,
+ struct xfs_ibulk *breq,
+ void __user *ubuffer)
+{
+ if (hdr->icount == 0 ||
+ (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
+ memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
+ return -EINVAL;
+
+ breq->startino = hdr->ino;
+ breq->ubuffer = ubuffer;
+ breq->icount = hdr->icount;
+ breq->ocount = 0;
+ breq->flags = 0;
+
+ /*
+ * The @ino parameter is a special value, so we must look it up here.
+ * We're not allowed to have IREQ_AGNO, and we only return one inode
+ * worth of data.
+ */
+ if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
+ if (hdr->flags & XFS_BULK_IREQ_AGNO)
+ return -EINVAL;
+
+ switch (hdr->ino) {
+ case XFS_BULK_IREQ_SPECIAL_ROOT:
+ hdr->ino = mp->m_sb.sb_rootino;
+ break;
+ default:
+ return -EINVAL;
+ }
+ breq->icount = 1;
+ }
+
+ /*
+ * The IREQ_AGNO flag means that we only want results from a given AG.
+ * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
+ * beyond the specified AG then we return no results.
+ */
+ if (hdr->flags & XFS_BULK_IREQ_AGNO) {
+ if (hdr->agno >= mp->m_sb.sb_agcount)
+ return -EINVAL;
+
+ if (breq->startino == 0)
+ breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
+ else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
+ return -EINVAL;
+
+ breq->flags |= XFS_IBULK_SAME_AG;
+
+ /* Asking for an inode past the end of the AG? We're done! */
+ if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
+ return -ECANCELED;
+ } else if (hdr->agno)
+ return -EINVAL;
+
+ /* Asking for an inode past the end of the FS? We're done! */
+ if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
+ return -ECANCELED;
+
+ if (hdr->flags & XFS_BULK_IREQ_NREXT64)
+ breq->flags |= XFS_IBULK_NREXT64;
+
+ return 0;
+}
+
+/*
+ * Update the userspace bulk request @hdr to reflect the end state of the
+ * internal bulk request @breq.
+ */
+static void
+xfs_bulk_ireq_teardown(
+ struct xfs_bulk_ireq *hdr,
+ struct xfs_ibulk *breq)
+{
+ hdr->ino = breq->startino;
+ hdr->ocount = breq->ocount;
+}
+
+/* Handle the v5 bulkstat ioctl. */
+STATIC int
+xfs_ioc_bulkstat(
+ struct file *file,
+ unsigned int cmd,
+ struct xfs_bulkstat_req __user *arg)
+{
+ struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
+ struct xfs_bulk_ireq hdr;
+ struct xfs_ibulk breq = {
+ .mp = mp,
+ .mnt_userns = file_mnt_user_ns(file),
+ };
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (xfs_is_shutdown(mp))
+ return -EIO;
+
+ if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
+ return -EFAULT;
+
+ error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
+ if (error == -ECANCELED)
+ goto out_teardown;
+ if (error < 0)
+ return error;
+
+ error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
+ if (error)
+ return error;
+
+out_teardown:
+ xfs_bulk_ireq_teardown(&hdr, &breq);
+ if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
+ return -EFAULT;
+
+ return 0;
+}
+
+STATIC int
+xfs_inumbers_fmt(
+ struct xfs_ibulk *breq,
+ const struct xfs_inumbers *igrp)
+{
+ if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
+ return -EFAULT;
+ return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
+}
+
+/* Handle the v5 inumbers ioctl. */
+STATIC int
+xfs_ioc_inumbers(
+ struct xfs_mount *mp,
+ unsigned int cmd,
+ struct xfs_inumbers_req __user *arg)
+{
+ struct xfs_bulk_ireq hdr;
+ struct xfs_ibulk breq = {
+ .mp = mp,
+ };
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (xfs_is_shutdown(mp))
+ return -EIO;
+
+ if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
+ return -EFAULT;
+
+ error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
+ if (error == -ECANCELED)
+ goto out_teardown;
+ if (error < 0)
+ return error;
+
+ error = xfs_inumbers(&breq, xfs_inumbers_fmt);
+ if (error)
+ return error;
+
+out_teardown:
+ xfs_bulk_ireq_teardown(&hdr, &breq);
+ if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
+ return -EFAULT;
+
+ return 0;
+}
+
+STATIC int
+xfs_ioc_fsgeometry(
+ struct xfs_mount *mp,
+ void __user *arg,
+ int struct_version)
+{
+ struct xfs_fsop_geom fsgeo;
+ size_t len;
+
+ xfs_fs_geometry(mp, &fsgeo, struct_version);
+
+ if (struct_version <= 3)
+ len = sizeof(struct xfs_fsop_geom_v1);
+ else if (struct_version == 4)
+ len = sizeof(struct xfs_fsop_geom_v4);
+ else {
+ xfs_fsop_geom_health(mp, &fsgeo);
+ len = sizeof(fsgeo);
+ }
+
+ if (copy_to_user(arg, &fsgeo, len))
+ return -EFAULT;
+ return 0;
+}
+
+STATIC int
+xfs_ioc_ag_geometry(
+ struct xfs_mount *mp,
+ void __user *arg)
+{
+ struct xfs_perag *pag;
+ struct xfs_ag_geometry ageo;
+ int error;
+
+ if (copy_from_user(&ageo, arg, sizeof(ageo)))
+ return -EFAULT;
+ if (ageo.ag_flags)
+ return -EINVAL;
+ if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
+ return -EINVAL;
+
+ pag = xfs_perag_get(mp, ageo.ag_number);
+ if (!pag)
+ return -EINVAL;
+
+ error = xfs_ag_get_geometry(pag, &ageo);
+ xfs_perag_put(pag);
+ if (error)
+ return error;
+
+ if (copy_to_user(arg, &ageo, sizeof(ageo)))
+ return -EFAULT;
+ return 0;
+}
+
+/*
+ * Linux extended inode flags interface.
+ */
+
+static void
+xfs_fill_fsxattr(
+ struct xfs_inode *ip,
+ int whichfork,
+ struct fileattr *fa)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
+
+ fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
+
+ if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
+ fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
+ } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
+ /*
+ * Don't let a misaligned extent size hint on a directory
+ * escape to userspace if it won't pass the setattr checks
+ * later.
+ */
+ if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
+ ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
+ fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
+ FS_XFLAG_EXTSZINHERIT);
+ fa->fsx_extsize = 0;
+ } else {
+ fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
+ }
+ }
+
+ if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
+ fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
+ fa->fsx_projid = ip->i_projid;
+ if (ifp && !xfs_need_iread_extents(ifp))
+ fa->fsx_nextents = xfs_iext_count(ifp);
+ else
+ fa->fsx_nextents = xfs_ifork_nextents(ifp);
+}
+
+STATIC int
+xfs_ioc_fsgetxattra(
+ xfs_inode_t *ip,
+ void __user *arg)
+{
+ struct fileattr fa;
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ return copy_fsxattr_to_user(&fa, arg);
+}
+
+int
+xfs_fileattr_get(
+ struct dentry *dentry,
+ struct fileattr *fa)
+{
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+
+ if (d_is_special(dentry))
+ return -ENOTTY;
+
+ xfs_ilock(ip, XFS_ILOCK_SHARED);
+ xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
+ xfs_iunlock(ip, XFS_ILOCK_SHARED);
+
+ 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_diflags & 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_diflags2 & (XFS_DIFLAG2_REFLINK |
+ XFS_DIFLAG2_BIGTIME |
+ XFS_DIFLAG2_NREXT64));
+
+ if (xflags & FS_XFLAG_DAX)
+ di_flags2 |= XFS_DIFLAG2_DAX;
+ if (xflags & FS_XFLAG_COWEXTSIZE)
+ di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
+
+ return di_flags2;
+}
+
+static int
+xfs_ioctl_setattr_xflags(
+ struct xfs_trans *tp,
+ struct xfs_inode *ip,
+ struct fileattr *fa)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ uint64_t i_flags2;
+
+ /* Can't change realtime flag if any extents are allocated. */
+ if ((ip->i_df.if_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_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_diflags2 &= ~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;
+
+ /* diflags2 only valid for v3 inodes. */
+ i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
+ if (i_flags2 && !xfs_has_v3inodes(mp))
+ return -EINVAL;
+
+ ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
+ ip->i_diflags2 = i_flags2;
+
+ xfs_diflags_to_iflags(ip, false);
+ 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;
+}
+
+static void
+xfs_ioctl_setattr_prepare_dax(
+ struct xfs_inode *ip,
+ struct fileattr *fa)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct inode *inode = VFS_I(ip);
+
+ if (S_ISDIR(inode->i_mode))
+ return;
+
+ if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
+ return;
+
+ if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
+ !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
+ (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
+ (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
+ d_mark_dontcache(inode);
+}
+
+/*
+ * 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_dquot *pdqp)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+ int error = -EROFS;
+
+ if (xfs_is_readonly(mp))
+ goto out_error;
+ error = -EIO;
+ if (xfs_is_shutdown(mp))
+ goto out_error;
+
+ error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
+ has_capability_noaudit(current, CAP_FOWNER), &tp);
+ if (error)
+ goto out_error;
+
+ if (xfs_has_wsync(mp))
+ xfs_trans_set_sync(tp);
+
+ return tp;
+
+out_error:
+ return ERR_PTR(error);
+}
+
+/*
+ * Validate a proposed extent size hint. For regular files, the hint can only
+ * be changed if no extents are allocated.
+ */
+static int
+xfs_ioctl_setattr_check_extsize(
+ struct xfs_inode *ip,
+ struct fileattr *fa)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ xfs_failaddr_t failaddr;
+ uint16_t new_diflags;
+
+ if (!fa->fsx_valid)
+ return 0;
+
+ if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
+ XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
+ return -EINVAL;
+
+ if (fa->fsx_extsize & mp->m_blockmask)
+ return -EINVAL;
+
+ new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
+
+ /*
+ * Inode verifiers do not check that the extent size hint is an integer
+ * multiple of the rt extent size on a directory with both rtinherit
+ * and extszinherit flags set. Don't let sysadmins misconfigure
+ * directories.
+ */
+ if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
+ (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
+ unsigned int rtextsize_bytes;
+
+ rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
+ if (fa->fsx_extsize % rtextsize_bytes)
+ return -EINVAL;
+ }
+
+ failaddr = xfs_inode_validate_extsize(ip->i_mount,
+ XFS_B_TO_FSB(mp, fa->fsx_extsize),
+ VFS_I(ip)->i_mode, new_diflags);
+ return failaddr != NULL ? -EINVAL : 0;
+}
+
+static int
+xfs_ioctl_setattr_check_cowextsize(
+ struct xfs_inode *ip,
+ struct fileattr *fa)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ xfs_failaddr_t failaddr;
+ uint64_t new_diflags2;
+ uint16_t new_diflags;
+
+ if (!fa->fsx_valid)
+ return 0;
+
+ if (fa->fsx_cowextsize & mp->m_blockmask)
+ return -EINVAL;
+
+ new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
+ new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
+
+ failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
+ XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
+ VFS_I(ip)->i_mode, new_diflags, new_diflags2);
+ return failaddr != NULL ? -EINVAL : 0;
+}
+
+static int
+xfs_ioctl_setattr_check_projid(
+ struct xfs_inode *ip,
+ struct fileattr *fa)
+{
+ if (!fa->fsx_valid)
+ return 0;
+
+ /* Disallow 32bit project ids if 32bit IDs are not enabled. */
+ if (fa->fsx_projid > (uint16_t)-1 &&
+ !xfs_has_projid32(ip->i_mount))
+ return -EINVAL;
+ return 0;
+}
+
+int
+xfs_fileattr_set(
+ struct user_namespace *mnt_userns,
+ struct dentry *dentry,
+ struct fileattr *fa)
+{
+ struct xfs_inode *ip = XFS_I(d_inode(dentry));
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_trans *tp;
+ struct xfs_dquot *pdqp = NULL;
+ struct xfs_dquot *olddquot = NULL;
+ int error;
+
+ trace_xfs_ioctl_setattr(ip);
+
+ if (d_is_special(dentry))
+ return -ENOTTY;
+
+ if (!fa->fsx_valid) {
+ if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
+ FS_NOATIME_FL | FS_NODUMP_FL |
+ FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
+ return -EOPNOTSUPP;
+ }
+
+ error = xfs_ioctl_setattr_check_projid(ip, fa);
+ if (error)
+ return error;
+
+ /*
+ * 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 (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
+ error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
+ VFS_I(ip)->i_gid, fa->fsx_projid,
+ XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
+ if (error)
+ return error;
+ }
+
+ xfs_ioctl_setattr_prepare_dax(ip, fa);
+
+ tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
+ if (IS_ERR(tp)) {
+ error = PTR_ERR(tp);
+ goto error_free_dquots;
+ }
+
+ error = xfs_ioctl_setattr_check_extsize(ip, fa);
+ if (error)
+ goto error_trans_cancel;
+
+ error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
+ if (error)
+ goto error_trans_cancel;
+
+ error = xfs_ioctl_setattr_xflags(tp, ip, fa);
+ if (error)
+ goto error_trans_cancel;
+
+ if (!fa->fsx_valid)
+ goto skip_xattr;
+ /*
+ * 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(mnt_userns, VFS_I(ip), CAP_FSETID))
+ VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
+
+ /* Change the ownerships and register project quota modifications */
+ if (ip->i_projid != fa->fsx_projid) {
+ if (XFS_IS_PQUOTA_ON(mp)) {
+ olddquot = xfs_qm_vop_chown(tp, ip,
+ &ip->i_pdquot, pdqp);
+ }
+ ip->i_projid = 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_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
+ ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
+ else
+ ip->i_extsize = 0;
+
+ if (xfs_has_v3inodes(mp)) {
+ if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
+ ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
+ else
+ ip->i_cowextsize = 0;
+ }
+
+skip_xattr:
+ error = xfs_trans_commit(tp);
+
+ /*
+ * Release any dquot(s) the inode had kept before chown.
+ */
+ xfs_qm_dqrele(olddquot);
+ xfs_qm_dqrele(pdqp);
+
+ return error;
+
+error_trans_cancel:
+ xfs_trans_cancel(tp);
+error_free_dquots:
+ xfs_qm_dqrele(pdqp);
+ 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;
+ fallthrough;
+ case XFS_IOC_GETBMAP:
+ /* 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 >= INT_MAX / recsize)
+ return -ENOMEM;
+
+ buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
+ 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 error;
+}
+
+STATIC int
+xfs_ioc_getfsmap(
+ struct xfs_inode *ip,
+ struct fsmap_head __user *arg)
+{
+ struct xfs_fsmap_head xhead = {0};
+ struct fsmap_head head;
+ struct fsmap *recs;
+ unsigned int count;
+ __u32 last_flags = 0;
+ bool done = 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;
+
+ /*
+ * Use an internal memory buffer so that we don't have to copy fsmap
+ * data to userspace while holding locks. Start by trying to allocate
+ * up to 128k for the buffer, but fall back to a single page if needed.
+ */
+ count = min_t(unsigned int, head.fmh_count,
+ 131072 / sizeof(struct fsmap));
+ recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
+ if (!recs) {
+ count = min_t(unsigned int, head.fmh_count,
+ PAGE_SIZE / sizeof(struct fsmap));
+ recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
+ if (!recs)
+ return -ENOMEM;
+ }
+
+ xhead.fmh_iflags = head.fmh_iflags;
+ 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]);
+
+ head.fmh_entries = 0;
+ do {
+ struct fsmap __user *user_recs;
+ struct fsmap *last_rec;
+
+ user_recs = &arg->fmh_recs[head.fmh_entries];
+ xhead.fmh_entries = 0;
+ xhead.fmh_count = min_t(unsigned int, count,
+ head.fmh_count - head.fmh_entries);
+
+ /* Run query, record how many entries we got. */
+ error = xfs_getfsmap(ip->i_mount, &xhead, recs);
+ switch (error) {
+ case 0:
+ /*
+ * There are no more records in the result set. Copy
+ * whatever we got to userspace and break out.
+ */
+ done = true;
+ break;
+ case -ECANCELED:
+ /*
+ * The internal memory buffer is full. Copy whatever
+ * records we got to userspace and go again if we have
+ * not yet filled the userspace buffer.
+ */
+ error = 0;
+ break;
+ default:
+ goto out_free;
+ }
+ head.fmh_entries += xhead.fmh_entries;
+ head.fmh_oflags = xhead.fmh_oflags;
+
+ /*
+ * If the caller wanted a record count or there aren't any
+ * new records to return, we're done.
+ */
+ if (head.fmh_count == 0 || xhead.fmh_entries == 0)
+ break;
+
+ /* Copy all the records we got out to userspace. */
+ if (copy_to_user(user_recs, recs,
+ xhead.fmh_entries * sizeof(struct fsmap))) {
+ error = -EFAULT;
+ goto out_free;
+ }
+
+ /* Remember the last record flags we copied to userspace. */
+ last_rec = &recs[xhead.fmh_entries - 1];
+ last_flags = last_rec->fmr_flags;
+
+ /* Set up the low key for the next iteration. */
+ xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
+ trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
+ } while (!done && head.fmh_entries < head.fmh_count);
+
+ /*
+ * If there are no more records in the query result set and we're not
+ * in counting mode, mark the last record returned with the LAST flag.
+ */
+ if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
+ struct fsmap __user *user_rec;
+
+ last_flags |= FMR_OF_LAST;
+ user_rec = &arg->fmh_recs[head.fmh_entries - 1];
+
+ if (copy_to_user(&user_rec->fmr_flags, &last_flags,
+ sizeof(last_flags))) {
+ error = -EFAULT;
+ goto out_free;
+ }
+ }
+
+ /* copy back header */
+ if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
+ error = -EFAULT;
+ goto out_free;
+ }
+
+out_free:
+ kmem_free(recs);
+ return error;
+}
+
+STATIC int
+xfs_ioc_scrub_metadata(
+ struct file *file,
+ 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(file, &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_is_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;
+}
+
+static int
+xfs_ioc_getlabel(
+ struct xfs_mount *mp,
+ char __user *user_label)
+{
+ struct xfs_sb *sbp = &mp->m_sb;
+ char label[XFSLABEL_MAX + 1];
+
+ /* Paranoia */
+ BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
+
+ /* 1 larger than sb_fname, so this ensures a trailing NUL char */
+ memset(label, 0, sizeof(label));
+ spin_lock(&mp->m_sb_lock);
+ strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
+ spin_unlock(&mp->m_sb_lock);
+
+ if (copy_to_user(user_label, label, sizeof(label)))
+ return -EFAULT;
+ return 0;
+}
+
+static int
+xfs_ioc_setlabel(
+ struct file *filp,
+ struct xfs_mount *mp,
+ char __user *newlabel)
+{
+ struct xfs_sb *sbp = &mp->m_sb;
+ char label[XFSLABEL_MAX + 1];
+ size_t len;
+ int error;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ /*
+ * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
+ * smaller, at 12 bytes. We copy one more to be sure we find the
+ * (required) NULL character to test the incoming label length.
+ * NB: The on disk label doesn't need to be null terminated.
+ */
+ if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
+ return -EFAULT;
+ len = strnlen(label, XFSLABEL_MAX + 1);
+ if (len > sizeof(sbp->sb_fname))
+ return -EINVAL;
+
+ error = mnt_want_write_file(filp);
+ if (error)
+ return error;
+
+ spin_lock(&mp->m_sb_lock);
+ memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
+ memcpy(sbp->sb_fname, label, len);
+ spin_unlock(&mp->m_sb_lock);
+
+ /*
+ * Now we do several things to satisfy userspace.
+ * In addition to normal logging of the primary superblock, we also
+ * immediately write these changes to sector zero for the primary, then
+ * update all backup supers (as xfs_db does for a label change), then
+ * invalidate the block device page cache. This is so that any prior
+ * buffered reads from userspace (i.e. from blkid) are invalidated,
+ * and userspace will see the newly-written label.
+ */
+ error = xfs_sync_sb_buf(mp);
+ if (error)
+ goto out;
+ /*
+ * growfs also updates backup supers so lock against that.
+ */
+ mutex_lock(&mp->m_growlock);
+ error = xfs_update_secondary_sbs(mp);
+ mutex_unlock(&mp->m_growlock);
+
+ invalidate_bdev(mp->m_ddev_targp->bt_bdev);
+
+out:
+ mnt_drop_write_file(filp);
+ return error;
+}
+
+static inline int
+xfs_fs_eofblocks_from_user(
+ struct xfs_fs_eofblocks *src,
+ struct xfs_icwalk *dst)
+{
+ if (src->eof_version != XFS_EOFBLOCKS_VERSION)
+ return -EINVAL;
+
+ if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
+ return -EINVAL;
+
+ if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
+ memchr_inv(src->pad64, 0, sizeof(src->pad64)))
+ return -EINVAL;
+
+ dst->icw_flags = 0;
+ if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
+ dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
+ if (src->eof_flags & XFS_EOF_FLAGS_UID)
+ dst->icw_flags |= XFS_ICWALK_FLAG_UID;
+ if (src->eof_flags & XFS_EOF_FLAGS_GID)
+ dst->icw_flags |= XFS_ICWALK_FLAG_GID;
+ if (src->eof_flags & XFS_EOF_FLAGS_PRID)
+ dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
+ if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
+ dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
+
+ dst->icw_prid = src->eof_prid;
+ dst->icw_min_file_size = src->eof_min_file_size;
+
+ dst->icw_uid = INVALID_UID;
+ if (src->eof_flags & XFS_EOF_FLAGS_UID) {
+ dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
+ if (!uid_valid(dst->icw_uid))
+ return -EINVAL;
+ }
+
+ dst->icw_gid = INVALID_GID;
+ if (src->eof_flags & XFS_EOF_FLAGS_GID) {
+ dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
+ if (!gid_valid(dst->icw_gid))
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * These long-unused ioctls were removed from the official ioctl API in 5.17,
+ * but retain these definitions so that we can log warnings about them.
+ */
+#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
+#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
+#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
+#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
+
+/*
+ * 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 FS_IOC_GETFSLABEL:
+ return xfs_ioc_getlabel(mp, arg);
+ case FS_IOC_SETFSLABEL:
+ return xfs_ioc_setlabel(filp, mp, arg);
+ case XFS_IOC_ALLOCSP:
+ case XFS_IOC_FREESP:
+ case XFS_IOC_ALLOCSP64:
+ case XFS_IOC_FREESP64:
+ xfs_warn_once(mp,
+ "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
+ current->comm);
+ return -ENOTTY;
+ case XFS_IOC_DIOINFO: {
+ struct xfs_buftarg *target = xfs_inode_buftarg(ip);
+ struct dioattr da;
+
+ 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_fsbulkstat(filp, cmd, arg);
+
+ case XFS_IOC_BULKSTAT:
+ return xfs_ioc_bulkstat(filp, cmd, arg);
+ case XFS_IOC_INUMBERS:
+ return xfs_ioc_inumbers(mp, cmd, arg);
+
+ case XFS_IOC_FSGEOMETRY_V1:
+ return xfs_ioc_fsgeometry(mp, arg, 3);
+ case XFS_IOC_FSGEOMETRY_V4:
+ return xfs_ioc_fsgeometry(mp, arg, 4);
+ case XFS_IOC_FSGEOMETRY:
+ return xfs_ioc_fsgeometry(mp, arg, 5);
+
+ case XFS_IOC_AG_GEOMETRY:
+ return xfs_ioc_ag_geometry(mp, arg);
+
+ case XFS_IOC_GETVERSION:
+ return put_user(inode->i_generation, (int __user *)arg);
+
+ case XFS_IOC_FSGETXATTRA:
+ return xfs_ioc_fsgetxattra(ip, arg);
+
+ 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(filp, 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_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;
+
+ xfs_fs_counts(mp, &out);
+
+ 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 (xfs_is_readonly(mp))
+ 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: {
+ struct xfs_growfs_data 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: {
+ struct xfs_growfs_log 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_icwalk icw;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (xfs_is_readonly(mp))
+ return -EROFS;
+
+ if (copy_from_user(&eofb, arg, sizeof(eofb)))
+ return -EFAULT;
+
+ error = xfs_fs_eofblocks_from_user(&eofb, &icw);
+ if (error)
+ return error;
+
+ trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
+
+ sb_start_write(mp->m_super);
+ error = xfs_blockgc_free_space(mp, &icw);
+ sb_end_write(mp->m_super);
+ return error;
+ }
+
+ default:
+ return -ENOTTY;
+ }
+}