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Dave Chinner0b61f8a2018-06-05 19:42:14 -07001// SPDX-License-Identifier: GPL-2.0
Linus Torvalds1da177e2005-04-16 15:20:36 -07002/*
Nathan Scott7b718762005-11-02 14:58:39 +11003 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07005 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include "xfs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include "xfs_fs.h"
Dave Chinner70a98832013-10-23 10:36:05 +11008#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +11009#include "xfs_format.h"
10#include "xfs_log_format.h"
11#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070013#include "xfs_inode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include "xfs_rtalloc.h"
Darrick J. Wong2810bd62019-07-02 09:39:40 -070015#include "xfs_iwalk.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include "xfs_itable.h"
Nathan Scotta844f452005-11-02 14:38:42 +110017#include "xfs_error.h"
Dave Chinnere0c41082022-05-12 15:12:52 +100018#include "xfs_da_format.h"
19#include "xfs_da_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_attr.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bmap.h"
Dave Chinner68988112013-08-12 20:49:42 +100022#include "xfs_bmap_util.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070023#include "xfs_fsops.h"
Christoph Hellwiga46db602011-01-07 13:02:04 +000024#include "xfs_discard.h"
Christoph Hellwig25fe55e2008-07-18 17:13:20 +100025#include "xfs_quota.h"
Christoph Hellwigd296d302009-01-19 02:02:57 +010026#include "xfs_export.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000027#include "xfs_trace.h"
Brian Foster8ca149d2012-11-07 12:21:12 -050028#include "xfs_icache.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110029#include "xfs_trans.h"
Andreas Gruenbacher47e1bf62015-11-03 12:56:17 +110030#include "xfs_acl.h"
Darrick J. Wonge89c0412017-03-28 14:56:37 -070031#include "xfs_btree.h"
32#include <linux/fsmap.h>
33#include "xfs_fsmap.h"
Darrick J. Wong36fd6e82017-10-17 21:37:34 -070034#include "scrub/xfs_scrub.h"
Darrick J. Wongc368ebc2018-01-08 10:51:27 -080035#include "xfs_sb.h"
Darrick J. Wong7cd50062019-04-12 07:41:17 -070036#include "xfs_ag.h"
Darrick J. Wongc23232d2019-04-12 07:41:17 -070037#include "xfs_health.h"
Christoph Hellwig7a42c702019-10-24 22:26:27 -070038#include "xfs_reflink.h"
Darrick J. Wong5f213dd2019-11-06 17:19:33 -080039#include "xfs_ioctl.h"
Darrick J. Wongefc2efe2022-05-27 10:34:04 +100040#include "xfs_xattr.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/mount.h>
43#include <linux/namei.h>
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +020044#include <linux/fileattr.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
46/*
47 * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
48 * a file or fs handle.
49 *
50 * XFS_IOC_PATH_TO_FSHANDLE
51 * returns fs handle for a mount point or path within that mount point
52 * XFS_IOC_FD_TO_HANDLE
53 * returns full handle for a FD opened in user space
54 * XFS_IOC_PATH_TO_HANDLE
55 * returns full handle for a path
56 */
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -060057int
Linus Torvalds1da177e2005-04-16 15:20:36 -070058xfs_find_handle(
59 unsigned int cmd,
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -060060 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -070061{
62 int hsize;
63 xfs_handle_t handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -070064 struct inode *inode;
Dave Chinnera30b0362013-09-02 20:49:36 +100065 struct fd f = {NULL};
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010066 struct path path;
Al Viro2903ff02012-08-28 12:52:22 -040067 int error;
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010068 struct xfs_inode *ip;
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010070 if (cmd == XFS_IOC_FD_TO_HANDLE) {
Al Viro2903ff02012-08-28 12:52:22 -040071 f = fdget(hreq->fd);
72 if (!f.file)
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010073 return -EBADF;
Al Viro496ad9a2013-01-23 17:07:38 -050074 inode = file_inode(f.file);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010075 } else {
Al Viroce6595a2019-07-14 16:42:44 -040076 error = user_path_at(AT_FDCWD, hreq->path, 0, &path);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010077 if (error)
78 return error;
David Howells2b0143b2015-03-17 22:25:59 +000079 inode = d_inode(path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 }
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010081 ip = XFS_I(inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010083 /*
84 * We can only generate handles for inodes residing on a XFS filesystem,
85 * and only for regular files, directories or symbolic links.
86 */
87 error = -EINVAL;
88 if (inode->i_sb->s_magic != XFS_SB_MAGIC)
89 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -070090
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010091 error = -EBADF;
92 if (!S_ISREG(inode->i_mode) &&
93 !S_ISDIR(inode->i_mode) &&
94 !S_ISLNK(inode->i_mode))
95 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -070096
Linus Torvalds1da177e2005-04-16 15:20:36 -070097
Christoph Hellwig4346cdd2009-02-08 21:51:14 +010098 memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t));
Linus Torvalds1da177e2005-04-16 15:20:36 -070099
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100100 if (cmd == XFS_IOC_PATH_TO_FSHANDLE) {
101 /*
102 * This handle only contains an fsid, zero the rest.
103 */
104 memset(&handle.ha_fid, 0, sizeof(handle.ha_fid));
105 hsize = sizeof(xfs_fsid_t);
106 } else {
Christoph Hellwigc6143912007-09-14 15:22:37 +1000107 handle.ha_fid.fid_len = sizeof(xfs_fid_t) -
108 sizeof(handle.ha_fid.fid_len);
109 handle.ha_fid.fid_pad = 0;
Dave Chinner9e9a2672016-02-09 16:54:58 +1100110 handle.ha_fid.fid_gen = inode->i_generation;
Christoph Hellwigc6143912007-09-14 15:22:37 +1000111 handle.ha_fid.fid_ino = ip->i_ino;
Christoph Hellwig3398a4002017-06-14 21:30:44 -0700112 hsize = sizeof(xfs_handle_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 }
114
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100115 error = -EFAULT;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600116 if (copy_to_user(hreq->ohandle, &handle, hsize) ||
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100117 copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32)))
118 goto out_put;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100120 error = 0;
121
122 out_put:
123 if (cmd == XFS_IOC_FD_TO_HANDLE)
Al Viro2903ff02012-08-28 12:52:22 -0400124 fdput(f);
Christoph Hellwig4346cdd2009-02-08 21:51:14 +0100125 else
126 path_put(&path);
127 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128}
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130/*
Christoph Hellwigd296d302009-01-19 02:02:57 +0100131 * No need to do permission checks on the various pathname components
132 * as the handle operations are privileged.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 */
134STATIC int
Christoph Hellwigd296d302009-01-19 02:02:57 +0100135xfs_handle_acceptable(
136 void *context,
137 struct dentry *dentry)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100139 return 1;
140}
141
142/*
143 * Convert userspace handle data into a dentry.
144 */
145struct dentry *
146xfs_handle_to_dentry(
147 struct file *parfilp,
148 void __user *uhandle,
149 u32 hlen)
150{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700151 xfs_handle_t handle;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100152 struct xfs_fid64 fid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153
154 /*
155 * Only allow handle opens under a directory.
156 */
Al Viro496ad9a2013-01-23 17:07:38 -0500157 if (!S_ISDIR(file_inode(parfilp)->i_mode))
Christoph Hellwigd296d302009-01-19 02:02:57 +0100158 return ERR_PTR(-ENOTDIR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700159
Christoph Hellwigd296d302009-01-19 02:02:57 +0100160 if (hlen != sizeof(xfs_handle_t))
161 return ERR_PTR(-EINVAL);
162 if (copy_from_user(&handle, uhandle, hlen))
163 return ERR_PTR(-EFAULT);
164 if (handle.ha_fid.fid_len !=
165 sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len))
166 return ERR_PTR(-EINVAL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Christoph Hellwigd296d302009-01-19 02:02:57 +0100168 memset(&fid, 0, sizeof(struct fid));
169 fid.ino = handle.ha_fid.fid_ino;
170 fid.gen = handle.ha_fid.fid_gen;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
Christoph Hellwigd296d302009-01-19 02:02:57 +0100172 return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3,
173 FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG,
174 xfs_handle_acceptable, NULL);
175}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700176
Christoph Hellwigd296d302009-01-19 02:02:57 +0100177STATIC struct dentry *
178xfs_handlereq_to_dentry(
179 struct file *parfilp,
180 xfs_fsop_handlereq_t *hreq)
181{
182 return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183}
184
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600185int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186xfs_open_by_handle(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100188 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189{
David Howells745ca242008-11-14 10:39:22 +1100190 const struct cred *cred = current_cred();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191 int error;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100192 int fd;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 int permflag;
194 struct file *filp;
195 struct inode *inode;
196 struct dentry *dentry;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000197 fmode_t fmode;
Al Viro765927b2012-06-26 21:58:53 +0400198 struct path path;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199
200 if (!capable(CAP_SYS_ADMIN))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000201 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202
Christoph Hellwigd296d302009-01-19 02:02:57 +0100203 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
204 if (IS_ERR(dentry))
205 return PTR_ERR(dentry);
David Howells2b0143b2015-03-17 22:25:59 +0000206 inode = d_inode(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207
208 /* Restrict xfs_open_by_handle to directories & regular files. */
209 if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) {
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000210 error = -EPERM;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100211 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 }
213
214#if BITS_PER_LONG != 32
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600215 hreq->oflags |= O_LARGEFILE;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700216#endif
Christoph Hellwigd296d302009-01-19 02:02:57 +0100217
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600218 permflag = hreq->oflags;
Dave Chinner1a1d7722012-03-22 05:15:06 +0000219 fmode = OPEN_FMODE(permflag);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220 if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) &&
Dave Chinner1a1d7722012-03-22 05:15:06 +0000221 (fmode & FMODE_WRITE) && IS_APPEND(inode)) {
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000222 error = -EPERM;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100223 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224 }
225
Dave Chinner1a1d7722012-03-22 05:15:06 +0000226 if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) {
Eryu Guan337684a2016-08-02 19:58:28 +0800227 error = -EPERM;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100228 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229 }
230
231 /* Can't write directories. */
Dave Chinner1a1d7722012-03-22 05:15:06 +0000232 if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) {
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000233 error = -EISDIR;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100234 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 }
236
Yann Droneaud862a6292013-07-02 18:39:34 +0200237 fd = get_unused_fd_flags(0);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100238 if (fd < 0) {
239 error = fd;
240 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 }
242
Al Viro765927b2012-06-26 21:58:53 +0400243 path.mnt = parfilp->f_path.mnt;
244 path.dentry = dentry;
245 filp = dentry_open(&path, hreq->oflags, cred);
246 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 if (IS_ERR(filp)) {
Christoph Hellwigd296d302009-01-19 02:02:57 +0100248 put_unused_fd(fd);
249 return PTR_ERR(filp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250 }
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500251
Al Viro03209372011-07-25 20:54:24 -0400252 if (S_ISREG(inode->i_mode)) {
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100253 filp->f_flags |= O_NOATIME;
Christoph Hellwig4d4be482008-12-09 04:47:33 -0500254 filp->f_mode |= FMODE_NOCMTIME;
Vlad Apostolov2e2e7bb2006-11-11 18:04:47 +1100255 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256
Christoph Hellwigd296d302009-01-19 02:02:57 +0100257 fd_install(fd, filp);
258 return fd;
259
260 out_dput:
261 dput(dentry);
262 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263}
264
sandeen@sandeen.netd5547f92008-11-25 21:20:08 -0600265int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266xfs_readlink_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100267 struct file *parfilp,
268 xfs_fsop_handlereq_t *hreq)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269{
Christoph Hellwigd296d302009-01-19 02:02:57 +0100270 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 __u32 olen;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000272 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
274 if (!capable(CAP_SYS_ADMIN))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000275 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276
Christoph Hellwigd296d302009-01-19 02:02:57 +0100277 dentry = xfs_handlereq_to_dentry(parfilp, hreq);
278 if (IS_ERR(dentry))
279 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280
281 /* Restrict this handle operation to symlinks only. */
Miklos Szeredifd4a0edf2016-12-09 16:45:04 +0100282 if (!d_is_symlink(dentry)) {
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000283 error = -EINVAL;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100284 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 }
286
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -0600287 if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) {
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000288 error = -EFAULT;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100289 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
Miklos Szeredifd4a0edf2016-12-09 16:45:04 +0100292 error = vfs_readlink(dentry, hreq->ohandle, olen);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700293
Christoph Hellwigd296d302009-01-19 02:02:57 +0100294 out_dput:
295 dput(dentry);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000296 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297}
298
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800299/*
300 * Format an attribute and copy it out to the user's buffer.
301 * Take care to check values and protect against them changing later,
302 * we may be reading them directly out of a user buffer.
303 */
304static void
305xfs_ioc_attr_put_listent(
306 struct xfs_attr_list_context *context,
307 int flags,
308 unsigned char *name,
309 int namelen,
310 int valuelen)
311{
312 struct xfs_attrlist *alist = context->buffer;
313 struct xfs_attrlist_ent *aep;
314 int arraytop;
315
316 ASSERT(!context->seen_enough);
317 ASSERT(context->count >= 0);
318 ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
319 ASSERT(context->firstu >= sizeof(*alist));
320 ASSERT(context->firstu <= context->bufsize);
321
322 /*
323 * Only list entries in the right namespace.
324 */
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800325 if (context->attr_filter != (flags & XFS_ATTR_NSP_ONDISK_MASK))
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800326 return;
327
328 arraytop = sizeof(*alist) +
329 context->count * sizeof(alist->al_offset[0]);
330
331 /* decrement by the actual bytes used by the attr */
332 context->firstu -= round_up(offsetof(struct xfs_attrlist_ent, a_name) +
333 namelen + 1, sizeof(uint32_t));
334 if (context->firstu < arraytop) {
335 trace_xfs_attr_list_full(context);
336 alist->al_more = 1;
337 context->seen_enough = 1;
338 return;
339 }
340
341 aep = context->buffer + context->firstu;
342 aep->a_valuelen = valuelen;
343 memcpy(aep->a_name, name, namelen);
344 aep->a_name[namelen] = 0;
345 alist->al_offset[context->count++] = context->firstu;
346 alist->al_count = context->count;
347 trace_xfs_attr_list_add(context);
348}
349
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800350static unsigned int
351xfs_attr_filter(
352 u32 ioc_flags)
353{
354 if (ioc_flags & XFS_IOC_ATTR_ROOT)
355 return XFS_ATTR_ROOT;
356 if (ioc_flags & XFS_IOC_ATTR_SECURE)
357 return XFS_ATTR_SECURE;
358 return 0;
359}
360
361static unsigned int
362xfs_attr_flags(
363 u32 ioc_flags)
364{
365 if (ioc_flags & XFS_IOC_ATTR_CREATE)
366 return XATTR_CREATE;
367 if (ioc_flags & XFS_IOC_ATTR_REPLACE)
368 return XATTR_REPLACE;
369 return 0;
370}
371
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800372int
373xfs_ioc_attr_list(
374 struct xfs_inode *dp,
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800375 void __user *ubuf,
Dan Carpenter6ed63562021-12-21 09:38:19 -0800376 size_t bufsize,
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800377 int flags,
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800378 struct xfs_attrlist_cursor __user *ucursor)
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800379{
Christoph Hellwige3a19cd2020-02-26 17:30:43 -0800380 struct xfs_attr_list_context context = { };
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800381 struct xfs_attrlist *alist;
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800382 void *buffer;
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800383 int error;
384
Christoph Hellwigf6046312020-02-26 17:30:40 -0800385 if (bufsize < sizeof(struct xfs_attrlist) ||
386 bufsize > XFS_XATTR_LIST_MAX)
387 return -EINVAL;
388
389 /*
390 * Reject flags, only allow namespaces.
391 */
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800392 if (flags & ~(XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
Christoph Hellwigf6046312020-02-26 17:30:40 -0800393 return -EINVAL;
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800394 if (flags == (XFS_IOC_ATTR_ROOT | XFS_IOC_ATTR_SECURE))
Christoph Hellwigf6046312020-02-26 17:30:40 -0800395 return -EINVAL;
396
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800397 /*
398 * Validate the cursor.
399 */
Christoph Hellwige3a19cd2020-02-26 17:30:43 -0800400 if (copy_from_user(&context.cursor, ucursor, sizeof(context.cursor)))
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800401 return -EFAULT;
Christoph Hellwige3a19cd2020-02-26 17:30:43 -0800402 if (context.cursor.pad1 || context.cursor.pad2)
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800403 return -EINVAL;
Christoph Hellwige3a19cd2020-02-26 17:30:43 -0800404 if (!context.cursor.initted &&
405 (context.cursor.hashval || context.cursor.blkno ||
406 context.cursor.offset))
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800407 return -EINVAL;
408
Carlos Maiolino8ca79df2020-09-01 11:47:12 -0700409 buffer = kvzalloc(bufsize, GFP_KERNEL);
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800410 if (!buffer)
411 return -ENOMEM;
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800412
413 /*
414 * Initialize the output buffer.
415 */
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800416 context.dp = dp;
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800417 context.resynch = 1;
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800418 context.attr_filter = xfs_attr_filter(flags);
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800419 context.buffer = buffer;
Christoph Hellwigf311d772020-02-26 17:30:44 -0800420 context.bufsize = round_down(bufsize, sizeof(uint32_t));
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800421 context.firstu = context.bufsize;
422 context.put_listent = xfs_ioc_attr_put_listent;
423
424 alist = context.buffer;
425 alist->al_count = 0;
426 alist->al_more = 0;
427 alist->al_offset[0] = context.bufsize;
428
Christoph Hellwig17e1dd82020-02-26 17:30:39 -0800429 error = xfs_attr_list(&context);
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800430 if (error)
431 goto out_free;
432
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800433 if (copy_to_user(ubuf, buffer, bufsize) ||
Christoph Hellwige3a19cd2020-02-26 17:30:43 -0800434 copy_to_user(ucursor, &context.cursor, sizeof(context.cursor)))
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800435 error = -EFAULT;
436out_free:
437 kmem_free(buffer);
Christoph Hellwig3e7a7792020-02-26 17:30:38 -0800438 return error;
439}
440
Linus Torvalds1da177e2005-04-16 15:20:36 -0700441STATIC int
442xfs_attrlist_by_handle(
Christoph Hellwigd296d302009-01-19 02:02:57 +0100443 struct file *parfilp,
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800444 struct xfs_fsop_attrlist_handlereq __user *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700445{
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800446 struct xfs_fsop_attrlist_handlereq al_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100447 struct dentry *dentry;
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800448 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449
450 if (!capable(CAP_SYS_ADMIN))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000451 return -EPERM;
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800452 if (copy_from_user(&al_hreq, p, sizeof(al_hreq)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000453 return -EFAULT;
Christoph Hellwig90ad58a2008-06-27 13:32:19 +1000454
Christoph Hellwigd296d302009-01-19 02:02:57 +0100455 dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq);
456 if (IS_ERR(dentry))
457 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Christoph Hellwigeb241c72020-02-26 17:30:40 -0800459 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), al_hreq.buffer,
Christoph Hellwig53ac39f2020-02-26 17:30:41 -0800460 al_hreq.buflen, al_hreq.flags, &p->pos);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100461 dput(dentry);
462 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463}
464
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800465static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466xfs_attrmulti_attr_get(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000467 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100468 unsigned char *name,
469 unsigned char __user *ubuf,
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700470 uint32_t *len,
471 uint32_t flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472{
Christoph Hellwige5171d72020-02-26 17:30:34 -0800473 struct xfs_da_args args = {
474 .dp = XFS_I(inode),
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800475 .attr_filter = xfs_attr_filter(flags),
476 .attr_flags = xfs_attr_flags(flags),
Christoph Hellwige5171d72020-02-26 17:30:34 -0800477 .name = name,
478 .namelen = strlen(name),
479 .valuelen = *len,
480 };
481 int error;
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000482
Jan Tulak51fcbfe2015-10-12 16:03:59 +1100483 if (*len > XFS_XATTR_SIZE_MAX)
Dave Chinner24513372014-06-25 14:58:08 +1000484 return -EINVAL;
Christoph Hellwige5171d72020-02-26 17:30:34 -0800485
Christoph Hellwige5171d72020-02-26 17:30:34 -0800486 error = xfs_attr_get(&args);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700487 if (error)
488 goto out_kfree;
489
Christoph Hellwige5171d72020-02-26 17:30:34 -0800490 *len = args.valuelen;
491 if (copy_to_user(ubuf, args.value, args.valuelen))
Dave Chinner24513372014-06-25 14:58:08 +1000492 error = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493
Dave Chinnerfdd3cce2013-09-02 20:53:00 +1000494out_kfree:
Christoph Hellwige5171d72020-02-26 17:30:34 -0800495 kmem_free(args.value);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 return error;
497}
498
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800499static int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500xfs_attrmulti_attr_set(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000501 struct inode *inode,
Dave Chinnera9273ca2010-01-20 10:47:48 +1100502 unsigned char *name,
503 const unsigned char __user *ubuf,
Darrick J. Wongc8ce5402017-06-16 11:00:05 -0700504 uint32_t len,
505 uint32_t flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506{
Christoph Hellwiga2544622020-02-26 17:30:33 -0800507 struct xfs_da_args args = {
508 .dp = XFS_I(inode),
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800509 .attr_filter = xfs_attr_filter(flags),
510 .attr_flags = xfs_attr_flags(flags),
Christoph Hellwiga2544622020-02-26 17:30:33 -0800511 .name = name,
512 .namelen = strlen(name),
513 };
Andreas Gruenbacher09cb22d2015-11-03 12:53:54 +1100514 int error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000516 if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
Dave Chinner24513372014-06-25 14:58:08 +1000517 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518
Christoph Hellwig6cc4f4f2020-02-26 17:30:30 -0800519 if (ubuf) {
520 if (len > XFS_XATTR_SIZE_MAX)
521 return -EINVAL;
Christoph Hellwiga2544622020-02-26 17:30:33 -0800522 args.value = memdup_user(ubuf, len);
523 if (IS_ERR(args.value))
524 return PTR_ERR(args.value);
525 args.valuelen = len;
Christoph Hellwig6cc4f4f2020-02-26 17:30:30 -0800526 }
Barry Naujoke8b0eba2008-04-22 17:34:31 +1000527
Darrick J. Wongefc2efe2022-05-27 10:34:04 +1000528 error = xfs_attr_change(&args);
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800529 if (!error && (flags & XFS_IOC_ATTR_ROOT))
Christoph Hellwig5a3930e2020-02-26 17:30:41 -0800530 xfs_forget_acl(inode, name);
Christoph Hellwiga2544622020-02-26 17:30:33 -0800531 kfree(args.value);
Andreas Gruenbacher09cb22d2015-11-03 12:53:54 +1100532 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533}
534
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800535int
536xfs_ioc_attrmulti_one(
537 struct file *parfilp,
538 struct inode *inode,
539 uint32_t opcode,
540 void __user *uname,
541 void __user *value,
542 uint32_t *len,
543 uint32_t flags)
544{
545 unsigned char *name;
546 int error;
547
Christoph Hellwigd5f0f492020-02-26 17:30:42 -0800548 if ((flags & XFS_IOC_ATTR_ROOT) && (flags & XFS_IOC_ATTR_SECURE))
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800549 return -EINVAL;
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800550
551 name = strndup_user(uname, MAXNAMELEN);
552 if (IS_ERR(name))
553 return PTR_ERR(name);
554
555 switch (opcode) {
556 case ATTR_OP_GET:
557 error = xfs_attrmulti_attr_get(inode, name, value, len, flags);
558 break;
559 case ATTR_OP_REMOVE:
560 value = NULL;
561 *len = 0;
Gustavo A. R. Silva53004ee2021-04-20 17:54:36 -0500562 fallthrough;
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800563 case ATTR_OP_SET:
564 error = mnt_want_write_file(parfilp);
565 if (error)
566 break;
567 error = xfs_attrmulti_attr_set(inode, name, value, *len, flags);
568 mnt_drop_write_file(parfilp);
569 break;
570 default:
571 error = -EINVAL;
572 break;
573 }
574
575 kfree(name);
576 return error;
577}
578
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579STATIC int
580xfs_attrmulti_by_handle(
Dave Hansen42a74f22008-02-15 14:37:46 -0800581 struct file *parfilp,
Christoph Hellwigd296d302009-01-19 02:02:57 +0100582 void __user *arg)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583{
584 int error;
585 xfs_attr_multiop_t *ops;
586 xfs_fsop_attrmulti_handlereq_t am_hreq;
Christoph Hellwigd296d302009-01-19 02:02:57 +0100587 struct dentry *dentry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 unsigned int i, size;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589
590 if (!capable(CAP_SYS_ADMIN))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000591 return -EPERM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700592 if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000593 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594
Zhitong Wangfda168c2010-03-23 09:51:22 +1100595 /* overflow check */
596 if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t))
597 return -E2BIG;
598
Christoph Hellwigd296d302009-01-19 02:02:57 +0100599 dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq);
600 if (IS_ERR(dentry))
601 return PTR_ERR(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602
Dave Chinner24513372014-06-25 14:58:08 +1000603 error = -E2BIG;
Christoph Hellwige182f572008-06-27 13:32:31 +1000604 size = am_hreq.opcount * sizeof(xfs_attr_multiop_t);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 if (!size || size > 16 * PAGE_SIZE)
Christoph Hellwigd296d302009-01-19 02:02:57 +0100606 goto out_dput;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700607
Li Zefan0e639bd2009-04-08 15:08:04 +0800608 ops = memdup_user(am_hreq.ops, size);
609 if (IS_ERR(ops)) {
Dave Chinner24513372014-06-25 14:58:08 +1000610 error = PTR_ERR(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100611 goto out_dput;
Li Zefan0e639bd2009-04-08 15:08:04 +0800612 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614 error = 0;
615 for (i = 0; i < am_hreq.opcount; i++) {
Christoph Hellwigd0ce64392020-02-26 17:30:31 -0800616 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp,
617 d_inode(dentry), ops[i].am_opcode,
618 ops[i].am_attrname, ops[i].am_attrvalue,
619 &ops[i].am_length, ops[i].am_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700620 }
621
622 if (copy_to_user(am_hreq.ops, ops, size))
Dave Chinner24513372014-06-25 14:58:08 +1000623 error = -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700624
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 kfree(ops);
Christoph Hellwigd296d302009-01-19 02:02:57 +0100626 out_dput:
627 dput(dentry);
Dave Chinner24513372014-06-25 14:58:08 +1000628 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629}
630
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700631/* Return 0 on success or positive error */
632int
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700633xfs_fsbulkstat_one_fmt(
Darrick J. Wong7035f972019-07-03 20:36:26 -0700634 struct xfs_ibulk *breq,
635 const struct xfs_bulkstat *bstat)
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700636{
Darrick J. Wong7035f972019-07-03 20:36:26 -0700637 struct xfs_bstat bs1;
638
639 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
640 if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700641 return -EFAULT;
642 return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
643}
644
Darrick J. Wong677717f2019-07-02 09:39:43 -0700645int
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700646xfs_fsinumbers_fmt(
Darrick J. Wong5f19c7f2019-07-03 20:36:27 -0700647 struct xfs_ibulk *breq,
648 const struct xfs_inumbers *igrp)
Darrick J. Wong677717f2019-07-02 09:39:43 -0700649{
Darrick J. Wong5f19c7f2019-07-03 20:36:27 -0700650 struct xfs_inogrp ig1;
651
652 xfs_inumbers_to_inogrp(&ig1, igrp);
653 if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
Darrick J. Wong677717f2019-07-02 09:39:43 -0700654 return -EFAULT;
655 return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
656}
657
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658STATIC int
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700659xfs_ioc_fsbulkstat(
Christoph Hellwigf736d932021-01-21 14:19:58 +0100660 struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661 unsigned int cmd,
662 void __user *arg)
663{
Christoph Hellwigf736d932021-01-21 14:19:58 +0100664 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700665 struct xfs_fsop_bulkreq bulkreq;
666 struct xfs_ibulk breq = {
667 .mp = mp,
Christoph Hellwigf736d932021-01-21 14:19:58 +0100668 .mnt_userns = file_mnt_user_ns(file),
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700669 .ocount = 0,
670 };
671 xfs_ino_t lastino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700672 int error;
673
674 /* done = 1 if there are more stats to get and if bulkstat */
675 /* should be called again (unused here, but used in dmapi) */
676
677 if (!capable(CAP_SYS_ADMIN))
678 return -EPERM;
679
Dave Chinner75c8c50f2021-08-18 18:46:53 -0700680 if (xfs_is_shutdown(mp))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000681 return -EIO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700682
Darrick J. Wong6f71fb62019-07-03 20:36:25 -0700683 if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000684 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700686 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000687 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700688
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700689 if (bulkreq.icount <= 0)
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000690 return -EINVAL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100692 if (bulkreq.ubuffer == NULL)
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000693 return -EINVAL;
Lachlan McIlroycd57e592007-11-23 16:30:32 +1100694
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700695 breq.ubuffer = bulkreq.ubuffer;
696 breq.icount = bulkreq.icount;
697
698 /*
699 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
700 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect
701 * that *lastip contains either zero or the number of the last inode to
702 * be examined by the previous call and return results starting with
703 * the next inode after that. The new bulk request back end functions
704 * take the inode to start with, so we have to compute the startino
705 * parameter from lastino to maintain correct function. lastino == 0
706 * is a special case because it has traditionally meant "first inode
707 * in filesystem".
708 */
709 if (cmd == XFS_IOC_FSINUMBERS) {
Darrick J. Wong677717f2019-07-02 09:39:43 -0700710 breq.startino = lastino ? lastino + 1 : 0;
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700711 error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
Darrick J. Wong677717f2019-07-02 09:39:43 -0700712 lastino = breq.startino - 1;
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700713 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
714 breq.startino = lastino;
715 breq.icount = 1;
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700716 error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700717 } else { /* XFS_IOC_FSBULKSTAT */
718 breq.startino = lastino ? lastino + 1 : 0;
Darrick J. Wong8bfe9d12019-07-03 20:36:26 -0700719 error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700720 lastino = breq.startino - 1;
721 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700722
723 if (error)
Dave Chinner24513372014-06-25 14:58:08 +1000724 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725
Darrick J. Wongf16fe3e2019-07-02 09:39:39 -0700726 if (bulkreq.lastip != NULL &&
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700727 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
Darrick J. Wongf16fe3e2019-07-02 09:39:39 -0700728 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700729
Darrick J. Wongf16fe3e2019-07-02 09:39:39 -0700730 if (bulkreq.ocount != NULL &&
Darrick J. Wong2810bd62019-07-02 09:39:40 -0700731 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
Darrick J. Wongf16fe3e2019-07-02 09:39:39 -0700732 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700733
734 return 0;
735}
736
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700737/* Return 0 on success or positive error */
738static int
739xfs_bulkstat_fmt(
740 struct xfs_ibulk *breq,
741 const struct xfs_bulkstat *bstat)
742{
743 if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
744 return -EFAULT;
745 return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
746}
747
748/*
749 * Check the incoming bulk request @hdr from userspace and initialize the
750 * internal @breq bulk request appropriately. Returns 0 if the bulk request
Darrick J. Wonge7ee96d2019-08-28 14:37:57 -0700751 * should proceed; -ECANCELED if there's nothing to do; or the usual
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700752 * negative error code.
753 */
754static int
755xfs_bulk_ireq_setup(
756 struct xfs_mount *mp,
Hironori Shiina817644f2022-12-26 10:11:19 -0800757 const struct xfs_bulk_ireq *hdr,
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700758 struct xfs_ibulk *breq,
759 void __user *ubuffer)
760{
761 if (hdr->icount == 0 ||
762 (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700763 memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
764 return -EINVAL;
765
766 breq->startino = hdr->ino;
767 breq->ubuffer = ubuffer;
768 breq->icount = hdr->icount;
769 breq->ocount = 0;
Darrick J. Wong13d59a22019-07-03 20:36:28 -0700770 breq->flags = 0;
771
772 /*
Darrick J. Wongbf3cb392019-07-03 20:36:29 -0700773 * The @ino parameter is a special value, so we must look it up here.
774 * We're not allowed to have IREQ_AGNO, and we only return one inode
775 * worth of data.
776 */
777 if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
778 if (hdr->flags & XFS_BULK_IREQ_AGNO)
779 return -EINVAL;
780
781 switch (hdr->ino) {
782 case XFS_BULK_IREQ_SPECIAL_ROOT:
Hironori Shiina817644f2022-12-26 10:11:19 -0800783 breq->startino = mp->m_sb.sb_rootino;
Darrick J. Wongbf3cb392019-07-03 20:36:29 -0700784 break;
785 default:
786 return -EINVAL;
787 }
788 breq->icount = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 }
790
Darrick J. Wongbf3cb392019-07-03 20:36:29 -0700791 /*
Darrick J. Wong13d59a22019-07-03 20:36:28 -0700792 * The IREQ_AGNO flag means that we only want results from a given AG.
793 * If @hdr->ino is zero, we start iterating in that AG. If @hdr->ino is
794 * beyond the specified AG then we return no results.
795 */
796 if (hdr->flags & XFS_BULK_IREQ_AGNO) {
797 if (hdr->agno >= mp->m_sb.sb_agcount)
798 return -EINVAL;
799
800 if (breq->startino == 0)
801 breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
802 else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
803 return -EINVAL;
804
805 breq->flags |= XFS_IBULK_SAME_AG;
806
807 /* Asking for an inode past the end of the AG? We're done! */
808 if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
Darrick J. Wonge7ee96d2019-08-28 14:37:57 -0700809 return -ECANCELED;
Darrick J. Wong13d59a22019-07-03 20:36:28 -0700810 } else if (hdr->agno)
811 return -EINVAL;
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700812
813 /* Asking for an inode past the end of the FS? We're done! */
814 if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
Darrick J. Wonge7ee96d2019-08-28 14:37:57 -0700815 return -ECANCELED;
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700816
Chandan Babu Rc3c4ecb2022-03-09 12:58:37 +0000817 if (hdr->flags & XFS_BULK_IREQ_NREXT64)
818 breq->flags |= XFS_IBULK_NREXT64;
819
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700820 return 0;
821}
822
823/*
824 * Update the userspace bulk request @hdr to reflect the end state of the
825 * internal bulk request @breq.
826 */
827static void
828xfs_bulk_ireq_teardown(
829 struct xfs_bulk_ireq *hdr,
830 struct xfs_ibulk *breq)
831{
832 hdr->ino = breq->startino;
833 hdr->ocount = breq->ocount;
834}
835
836/* Handle the v5 bulkstat ioctl. */
837STATIC int
838xfs_ioc_bulkstat(
Christoph Hellwigf736d932021-01-21 14:19:58 +0100839 struct file *file,
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700840 unsigned int cmd,
841 struct xfs_bulkstat_req __user *arg)
842{
Christoph Hellwigf736d932021-01-21 14:19:58 +0100843 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount;
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700844 struct xfs_bulk_ireq hdr;
845 struct xfs_ibulk breq = {
846 .mp = mp,
Christoph Hellwigf736d932021-01-21 14:19:58 +0100847 .mnt_userns = file_mnt_user_ns(file),
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700848 };
849 int error;
850
851 if (!capable(CAP_SYS_ADMIN))
852 return -EPERM;
853
Dave Chinner75c8c50f2021-08-18 18:46:53 -0700854 if (xfs_is_shutdown(mp))
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700855 return -EIO;
856
857 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
858 return -EFAULT;
859
860 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
Darrick J. Wonge7ee96d2019-08-28 14:37:57 -0700861 if (error == -ECANCELED)
Darrick J. Wong0448b6f2019-07-03 20:36:27 -0700862 goto out_teardown;
863 if (error < 0)
864 return error;
865
866 error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
867 if (error)
868 return error;
869
870out_teardown:
871 xfs_bulk_ireq_teardown(&hdr, &breq);
872 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
873 return -EFAULT;
874
875 return 0;
876}
877
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878STATIC int
Darrick J. Wongfba97602019-07-03 20:36:28 -0700879xfs_inumbers_fmt(
880 struct xfs_ibulk *breq,
881 const struct xfs_inumbers *igrp)
882{
883 if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
884 return -EFAULT;
885 return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
886}
887
888/* Handle the v5 inumbers ioctl. */
889STATIC int
890xfs_ioc_inumbers(
891 struct xfs_mount *mp,
892 unsigned int cmd,
893 struct xfs_inumbers_req __user *arg)
894{
895 struct xfs_bulk_ireq hdr;
896 struct xfs_ibulk breq = {
897 .mp = mp,
898 };
899 int error;
900
901 if (!capable(CAP_SYS_ADMIN))
902 return -EPERM;
903
Dave Chinner75c8c50f2021-08-18 18:46:53 -0700904 if (xfs_is_shutdown(mp))
Darrick J. Wongfba97602019-07-03 20:36:28 -0700905 return -EIO;
906
907 if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
908 return -EFAULT;
909
910 error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
Darrick J. Wonge7ee96d2019-08-28 14:37:57 -0700911 if (error == -ECANCELED)
Darrick J. Wongfba97602019-07-03 20:36:28 -0700912 goto out_teardown;
913 if (error < 0)
914 return error;
915
916 error = xfs_inumbers(&breq, xfs_inumbers_fmt);
917 if (error)
918 return error;
919
920out_teardown:
921 xfs_bulk_ireq_teardown(&hdr, &breq);
922 if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
923 return -EFAULT;
924
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925 return 0;
926}
927
928STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929xfs_ioc_fsgeometry(
Dave Chinner1b6d9682019-04-12 07:41:16 -0700930 struct xfs_mount *mp,
931 void __user *arg,
932 int struct_version)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700933{
Dave Chinner1b6d9682019-04-12 07:41:16 -0700934 struct xfs_fsop_geom fsgeo;
935 size_t len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700936
Dave Chinner03288b12021-08-18 18:46:54 -0700937 xfs_fs_geometry(mp, &fsgeo, struct_version);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938
Dave Chinner1b6d9682019-04-12 07:41:16 -0700939 if (struct_version <= 3)
940 len = sizeof(struct xfs_fsop_geom_v1);
941 else if (struct_version == 4)
942 len = sizeof(struct xfs_fsop_geom_v4);
Darrick J. Wongc23232d2019-04-12 07:41:17 -0700943 else {
944 xfs_fsop_geom_health(mp, &fsgeo);
Dave Chinner1b6d9682019-04-12 07:41:16 -0700945 len = sizeof(fsgeo);
Darrick J. Wongc23232d2019-04-12 07:41:17 -0700946 }
Dave Chinner1b6d9682019-04-12 07:41:16 -0700947
948 if (copy_to_user(arg, &fsgeo, len))
Eric Sandeenb474c7a2014-06-22 15:04:54 +1000949 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 return 0;
951}
952
Darrick J. Wong7cd50062019-04-12 07:41:17 -0700953STATIC int
954xfs_ioc_ag_geometry(
955 struct xfs_mount *mp,
956 void __user *arg)
957{
Dave Chinnerc6aee242022-07-07 19:07:09 +1000958 struct xfs_perag *pag;
Darrick J. Wong7cd50062019-04-12 07:41:17 -0700959 struct xfs_ag_geometry ageo;
960 int error;
961
962 if (copy_from_user(&ageo, arg, sizeof(ageo)))
963 return -EFAULT;
Darrick J. Wong76f17932019-08-30 16:30:22 -0700964 if (ageo.ag_flags)
965 return -EINVAL;
966 if (memchr_inv(&ageo.ag_reserved, 0, sizeof(ageo.ag_reserved)))
967 return -EINVAL;
Darrick J. Wong7cd50062019-04-12 07:41:17 -0700968
Dave Chinnerc6aee242022-07-07 19:07:09 +1000969 pag = xfs_perag_get(mp, ageo.ag_number);
970 if (!pag)
971 return -EINVAL;
972
973 error = xfs_ag_get_geometry(pag, &ageo);
974 xfs_perag_put(pag);
Darrick J. Wong7cd50062019-04-12 07:41:17 -0700975 if (error)
976 return error;
977
978 if (copy_to_user(arg, &ageo, sizeof(ageo)))
979 return -EFAULT;
980 return 0;
981}
982
Linus Torvalds1da177e2005-04-16 15:20:36 -0700983/*
984 * Linux extended inode flags interface.
985 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700986
Darrick J. Wong7b0e4922019-07-01 08:25:35 -0700987static void
988xfs_fill_fsxattr(
989 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +0200990 int whichfork,
991 struct fileattr *fa)
Darrick J. Wong7b0e4922019-07-01 08:25:35 -0700992{
Christoph Hellwig48008872021-03-29 11:11:42 -0700993 struct xfs_mount *mp = ip->i_mount;
Darrick J. Wong732436e2022-07-09 10:56:05 -0700994 struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
Christoph Hellwigdaf83962020-05-18 10:27:22 -0700995
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +0200996 fileattr_fill_xflags(fa, xfs_ip2xflags(ip));
Christoph Hellwig48008872021-03-29 11:11:42 -0700997
Darrick J. Wong5aa5b272021-07-12 12:58:51 -0700998 if (ip->i_diflags & XFS_DIFLAG_EXTSIZE) {
999 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1000 } else if (ip->i_diflags & XFS_DIFLAG_EXTSZINHERIT) {
1001 /*
1002 * Don't let a misaligned extent size hint on a directory
1003 * escape to userspace if it won't pass the setattr checks
1004 * later.
1005 */
1006 if ((ip->i_diflags & XFS_DIFLAG_RTINHERIT) &&
1007 ip->i_extsize % mp->m_sb.sb_rextsize > 0) {
1008 fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE |
1009 FS_XFLAG_EXTSZINHERIT);
1010 fa->fsx_extsize = 0;
1011 } else {
1012 fa->fsx_extsize = XFS_FSB_TO_B(mp, ip->i_extsize);
1013 }
1014 }
1015
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001016 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
Christoph Hellwigee7b83f2021-03-29 11:11:43 -07001017 fa->fsx_cowextsize = XFS_FSB_TO_B(mp, ip->i_cowextsize);
Christoph Hellwigceaf6032021-03-29 11:11:39 -07001018 fa->fsx_projid = ip->i_projid;
Christoph Hellwigb2197a32021-04-13 11:15:12 -07001019 if (ifp && !xfs_need_iread_extents(ifp))
Christoph Hellwigdaf83962020-05-18 10:27:22 -07001020 fa->fsx_nextents = xfs_iext_count(ifp);
1021 else
1022 fa->fsx_nextents = xfs_ifork_nextents(ifp);
Darrick J. Wong7b0e4922019-07-01 08:25:35 -07001023}
1024
Linus Torvalds1da177e2005-04-16 15:20:36 -07001025STATIC int
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001026xfs_ioc_fsgetxattra(
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001027 xfs_inode_t *ip,
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001028 void __user *arg)
1029{
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001030 struct fileattr fa;
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001031
1032 xfs_ilock(ip, XFS_ILOCK_SHARED);
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001033 xfs_fill_fsxattr(ip, XFS_ATTR_FORK, &fa);
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001034 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1035
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001036 return copy_fsxattr_to_user(&fa, arg);
1037}
1038
1039int
1040xfs_fileattr_get(
1041 struct dentry *dentry,
1042 struct fileattr *fa)
1043{
1044 struct xfs_inode *ip = XFS_I(d_inode(dentry));
1045
1046 if (d_is_special(dentry))
1047 return -ENOTTY;
1048
1049 xfs_ilock(ip, XFS_ILOCK_SHARED);
1050 xfs_fill_fsxattr(ip, XFS_DATA_FORK, fa);
1051 xfs_iunlock(ip, XFS_ILOCK_SHARED);
1052
Christoph Hellwigc83bfab2007-10-11 17:47:00 +10001053 return 0;
1054}
1055
Christoph Hellwigdd606872017-09-02 08:21:20 -07001056STATIC uint16_t
1057xfs_flags2diflags(
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001058 struct xfs_inode *ip,
1059 unsigned int xflags)
1060{
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001061 /* can't set PREALLOC this way, just preserve it */
Christoph Hellwigdd606872017-09-02 08:21:20 -07001062 uint16_t di_flags =
Christoph Hellwigdb073492021-03-29 11:11:44 -07001063 (ip->i_diflags & XFS_DIFLAG_PREALLOC);
Christoph Hellwigdd606872017-09-02 08:21:20 -07001064
Dave Chinnere7b89482016-01-04 16:44:15 +11001065 if (xflags & FS_XFLAG_IMMUTABLE)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001066 di_flags |= XFS_DIFLAG_IMMUTABLE;
Dave Chinnere7b89482016-01-04 16:44:15 +11001067 if (xflags & FS_XFLAG_APPEND)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001068 di_flags |= XFS_DIFLAG_APPEND;
Dave Chinnere7b89482016-01-04 16:44:15 +11001069 if (xflags & FS_XFLAG_SYNC)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001070 di_flags |= XFS_DIFLAG_SYNC;
Dave Chinnere7b89482016-01-04 16:44:15 +11001071 if (xflags & FS_XFLAG_NOATIME)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001072 di_flags |= XFS_DIFLAG_NOATIME;
Dave Chinnere7b89482016-01-04 16:44:15 +11001073 if (xflags & FS_XFLAG_NODUMP)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001074 di_flags |= XFS_DIFLAG_NODUMP;
Dave Chinnere7b89482016-01-04 16:44:15 +11001075 if (xflags & FS_XFLAG_NODEFRAG)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001076 di_flags |= XFS_DIFLAG_NODEFRAG;
Dave Chinnere7b89482016-01-04 16:44:15 +11001077 if (xflags & FS_XFLAG_FILESTREAM)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001078 di_flags |= XFS_DIFLAG_FILESTREAM;
Dave Chinnerc19b3b052016-02-09 16:54:58 +11001079 if (S_ISDIR(VFS_I(ip)->i_mode)) {
Dave Chinnere7b89482016-01-04 16:44:15 +11001080 if (xflags & FS_XFLAG_RTINHERIT)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001081 di_flags |= XFS_DIFLAG_RTINHERIT;
Dave Chinnere7b89482016-01-04 16:44:15 +11001082 if (xflags & FS_XFLAG_NOSYMLINKS)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001083 di_flags |= XFS_DIFLAG_NOSYMLINKS;
Dave Chinnere7b89482016-01-04 16:44:15 +11001084 if (xflags & FS_XFLAG_EXTSZINHERIT)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001085 di_flags |= XFS_DIFLAG_EXTSZINHERIT;
Dave Chinnere7b89482016-01-04 16:44:15 +11001086 if (xflags & FS_XFLAG_PROJINHERIT)
Dave Chinner9336e3a2014-10-02 09:18:40 +10001087 di_flags |= XFS_DIFLAG_PROJINHERIT;
Dave Chinnerc19b3b052016-02-09 16:54:58 +11001088 } else if (S_ISREG(VFS_I(ip)->i_mode)) {
Dave Chinnere7b89482016-01-04 16:44:15 +11001089 if (xflags & FS_XFLAG_REALTIME)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001090 di_flags |= XFS_DIFLAG_REALTIME;
Dave Chinnere7b89482016-01-04 16:44:15 +11001091 if (xflags & FS_XFLAG_EXTSIZE)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001092 di_flags |= XFS_DIFLAG_EXTSIZE;
1093 }
Dave Chinner58f88ca2016-01-04 16:44:15 +11001094
Christoph Hellwigdd606872017-09-02 08:21:20 -07001095 return di_flags;
1096}
Dave Chinner58f88ca2016-01-04 16:44:15 +11001097
Christoph Hellwigdd606872017-09-02 08:21:20 -07001098STATIC uint64_t
1099xfs_flags2diflags2(
1100 struct xfs_inode *ip,
1101 unsigned int xflags)
1102{
1103 uint64_t di_flags2 =
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001104 (ip->i_diflags2 & (XFS_DIFLAG2_REFLINK |
Darrick J. Wonge89ab762022-06-05 18:51:23 -07001105 XFS_DIFLAG2_BIGTIME |
1106 XFS_DIFLAG2_NREXT64));
Christoph Hellwigdd606872017-09-02 08:21:20 -07001107
Dave Chinner58f88ca2016-01-04 16:44:15 +11001108 if (xflags & FS_XFLAG_DAX)
1109 di_flags2 |= XFS_DIFLAG2_DAX;
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001110 if (xflags & FS_XFLAG_COWEXTSIZE)
1111 di_flags2 |= XFS_DIFLAG2_COWEXTSIZE;
Dave Chinner58f88ca2016-01-04 16:44:15 +11001112
Christoph Hellwigdd606872017-09-02 08:21:20 -07001113 return di_flags2;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001114}
1115
Dave Chinner29a17c02015-02-02 10:14:25 +11001116static int
1117xfs_ioctl_setattr_xflags(
1118 struct xfs_trans *tp,
1119 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001120 struct fileattr *fa)
Dave Chinner29a17c02015-02-02 10:14:25 +11001121{
1122 struct xfs_mount *mp = ip->i_mount;
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001123 uint64_t i_flags2;
Dave Chinner29a17c02015-02-02 10:14:25 +11001124
1125 /* Can't change realtime flag if any extents are allocated. */
Christoph Hellwigdaf83962020-05-18 10:27:22 -07001126 if ((ip->i_df.if_nextents || ip->i_delayed_blks) &&
Dave Chinnere7b89482016-01-04 16:44:15 +11001127 XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME))
Dave Chinner29a17c02015-02-02 10:14:25 +11001128 return -EINVAL;
1129
1130 /* If realtime flag is set then must have realtime device */
Dave Chinnere7b89482016-01-04 16:44:15 +11001131 if (fa->fsx_xflags & FS_XFLAG_REALTIME) {
Dave Chinner29a17c02015-02-02 10:14:25 +11001132 if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 ||
Christoph Hellwig031474c2021-03-29 11:11:41 -07001133 (ip->i_extsize % mp->m_sb.sb_rextsize))
Dave Chinner29a17c02015-02-02 10:14:25 +11001134 return -EINVAL;
1135 }
1136
Darrick J. Wong1987fd72016-10-10 16:49:29 +11001137 /* Clear reflink if we are actually able to set the rt flag. */
Darrick J. Wongc8e156a2016-10-03 09:11:50 -07001138 if ((fa->fsx_xflags & FS_XFLAG_REALTIME) && xfs_is_reflink_inode(ip))
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001139 ip->i_diflags2 &= ~XFS_DIFLAG2_REFLINK;
Darrick J. Wongc8e156a2016-10-03 09:11:50 -07001140
Christoph Hellwigdd606872017-09-02 08:21:20 -07001141 /* diflags2 only valid for v3 inodes. */
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001142 i_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
Dave Chinner38c26bf2021-08-18 18:46:37 -07001143 if (i_flags2 && !xfs_has_v3inodes(mp))
Christoph Hellwigdd606872017-09-02 08:21:20 -07001144 return -EINVAL;
1145
Christoph Hellwigdb073492021-03-29 11:11:44 -07001146 ip->i_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001147 ip->i_diflags2 = i_flags2;
Christoph Hellwigdd606872017-09-02 08:21:20 -07001148
Ira Weiny840d4932020-05-04 09:02:43 -07001149 xfs_diflags_to_iflags(ip, false);
Dave Chinner29a17c02015-02-02 10:14:25 +11001150 xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG);
1151 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
Bill O'Donnellff6d6af2015-10-12 18:21:22 +11001152 XFS_STATS_INC(mp, xs_ig_attrchg);
Dave Chinner29a17c02015-02-02 10:14:25 +11001153 return 0;
1154}
1155
Ira Weinye4f9ba22020-04-30 07:41:38 -07001156static void
1157xfs_ioctl_setattr_prepare_dax(
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001158 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001159 struct fileattr *fa)
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001160{
Ira Weinye4f9ba22020-04-30 07:41:38 -07001161 struct xfs_mount *mp = ip->i_mount;
1162 struct inode *inode = VFS_I(ip);
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001163
Darrick J. Wongaaacdd22018-05-31 15:07:47 -07001164 if (S_ISDIR(inode->i_mode))
Ira Weinye4f9ba22020-04-30 07:41:38 -07001165 return;
Darrick J. Wongaaacdd22018-05-31 15:07:47 -07001166
Dave Chinner0560f312021-08-18 18:46:52 -07001167 if (xfs_has_dax_always(mp) || xfs_has_dax_never(mp))
Ira Weinye4f9ba22020-04-30 07:41:38 -07001168 return;
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001169
Ira Weinye4f9ba22020-04-30 07:41:38 -07001170 if (((fa->fsx_xflags & FS_XFLAG_DAX) &&
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001171 !(ip->i_diflags2 & XFS_DIFLAG2_DAX)) ||
Ira Weinye4f9ba22020-04-30 07:41:38 -07001172 (!(fa->fsx_xflags & FS_XFLAG_DAX) &&
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001173 (ip->i_diflags2 & XFS_DIFLAG2_DAX)))
Ira Weinye4f9ba22020-04-30 07:41:38 -07001174 d_mark_dontcache(inode);
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001175}
1176
1177/*
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001178 * Set up the transaction structure for the setattr operation, checking that we
1179 * have permission to do so. On success, return a clean transaction and the
1180 * inode locked exclusively ready for further operation specific checks. On
1181 * failure, return an error without modifying or locking the inode.
1182 */
1183static struct xfs_trans *
1184xfs_ioctl_setattr_get_trans(
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001185 struct xfs_inode *ip,
Darrick J. Wong7317a032021-01-29 11:32:09 -08001186 struct xfs_dquot *pdqp)
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001187{
1188 struct xfs_mount *mp = ip->i_mount;
1189 struct xfs_trans *tp;
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001190 int error = -EROFS;
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001191
Dave Chinner2e973b22021-08-18 18:46:52 -07001192 if (xfs_is_readonly(mp))
Darrick J. Wong7317a032021-01-29 11:32:09 -08001193 goto out_error;
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001194 error = -EIO;
Dave Chinner75c8c50f2021-08-18 18:46:53 -07001195 if (xfs_is_shutdown(mp))
Darrick J. Wong7317a032021-01-29 11:32:09 -08001196 goto out_error;
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001197
Darrick J. Wong7317a032021-01-29 11:32:09 -08001198 error = xfs_trans_alloc_ichange(ip, NULL, NULL, pdqp,
Darrick J. Wongeba05492022-02-25 16:18:30 -08001199 has_capability_noaudit(current, CAP_FOWNER), &tp);
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001200 if (error)
Darrick J. Wong7317a032021-01-29 11:32:09 -08001201 goto out_error;
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001202
Dave Chinner0560f312021-08-18 18:46:52 -07001203 if (xfs_has_wsync(mp))
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001204 xfs_trans_set_sync(tp);
1205
1206 return tp;
1207
Darrick J. Wong7317a032021-01-29 11:32:09 -08001208out_error:
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001209 return ERR_PTR(error);
1210}
1211
Iustin Pop9b94fcc2015-02-02 10:26:26 +11001212/*
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001213 * Validate a proposed extent size hint. For regular files, the hint can only
1214 * be changed if no extents are allocated.
Iustin Pop9b94fcc2015-02-02 10:26:26 +11001215 */
kbuild test robotf92090e2015-02-05 11:13:21 +11001216static int
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001217xfs_ioctl_setattr_check_extsize(
1218 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001219 struct fileattr *fa)
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001220{
1221 struct xfs_mount *mp = ip->i_mount;
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001222 xfs_failaddr_t failaddr;
1223 uint16_t new_diflags;
Iustin Pop9b94fcc2015-02-02 10:26:26 +11001224
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001225 if (!fa->fsx_valid)
1226 return 0;
1227
Christoph Hellwigdaf83962020-05-18 10:27:22 -07001228 if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_df.if_nextents &&
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001229 XFS_FSB_TO_B(mp, ip->i_extsize) != fa->fsx_extsize)
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001230 return -EINVAL;
1231
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001232 if (fa->fsx_extsize & mp->m_blockmask)
Darrick J. Wongca29be72019-07-01 08:25:36 -07001233 return -EINVAL;
1234
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001235 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001236
Darrick J. Wong603f0002021-05-12 12:51:26 -07001237 /*
Darrick J. Wong83193e52021-07-12 12:58:50 -07001238 * Inode verifiers do not check that the extent size hint is an integer
1239 * multiple of the rt extent size on a directory with both rtinherit
1240 * and extszinherit flags set. Don't let sysadmins misconfigure
1241 * directories.
Darrick J. Wong603f0002021-05-12 12:51:26 -07001242 */
1243 if ((new_diflags & XFS_DIFLAG_RTINHERIT) &&
1244 (new_diflags & XFS_DIFLAG_EXTSZINHERIT)) {
1245 unsigned int rtextsize_bytes;
1246
1247 rtextsize_bytes = XFS_FSB_TO_B(mp, mp->m_sb.sb_rextsize);
1248 if (fa->fsx_extsize % rtextsize_bytes)
1249 return -EINVAL;
1250 }
1251
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001252 failaddr = xfs_inode_validate_extsize(ip->i_mount,
1253 XFS_B_TO_FSB(mp, fa->fsx_extsize),
1254 VFS_I(ip)->i_mode, new_diflags);
1255 return failaddr != NULL ? -EINVAL : 0;
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001256}
1257
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001258static int
1259xfs_ioctl_setattr_check_cowextsize(
1260 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001261 struct fileattr *fa)
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001262{
1263 struct xfs_mount *mp = ip->i_mount;
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001264 xfs_failaddr_t failaddr;
1265 uint64_t new_diflags2;
1266 uint16_t new_diflags;
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001267
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001268 if (!fa->fsx_valid)
1269 return 0;
1270
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001271 if (fa->fsx_cowextsize & mp->m_blockmask)
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001272 return -EINVAL;
1273
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001274 new_diflags = xfs_flags2diflags(ip, fa->fsx_xflags);
1275 new_diflags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
Darrick J. Wongca29be72019-07-01 08:25:36 -07001276
Darrick J. Wong6b69e482021-05-12 12:49:19 -07001277 failaddr = xfs_inode_validate_cowextsize(ip->i_mount,
1278 XFS_B_TO_FSB(mp, fa->fsx_cowextsize),
1279 VFS_I(ip)->i_mode, new_diflags, new_diflags2);
1280 return failaddr != NULL ? -EINVAL : 0;
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001281}
1282
kbuild test robotf92090e2015-02-05 11:13:21 +11001283static int
Dave Chinner23bd0732015-02-02 10:22:53 +11001284xfs_ioctl_setattr_check_projid(
1285 struct xfs_inode *ip,
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001286 struct fileattr *fa)
Dave Chinner23bd0732015-02-02 10:22:53 +11001287{
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001288 if (!fa->fsx_valid)
1289 return 0;
1290
Dave Chinner38c26bf2021-08-18 18:46:37 -07001291 /* Disallow 32bit project ids if 32bit IDs are not enabled. */
Darrick J. Wongc8ce5402017-06-16 11:00:05 -07001292 if (fa->fsx_projid > (uint16_t)-1 &&
Dave Chinner38c26bf2021-08-18 18:46:37 -07001293 !xfs_has_projid32(ip->i_mount))
Dave Chinner23bd0732015-02-02 10:22:53 +11001294 return -EINVAL;
Dave Chinner23bd0732015-02-02 10:22:53 +11001295 return 0;
1296}
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001297
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001298int
1299xfs_fileattr_set(
1300 struct user_namespace *mnt_userns,
1301 struct dentry *dentry,
1302 struct fileattr *fa)
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001303{
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001304 struct xfs_inode *ip = XFS_I(d_inode(dentry));
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001305 struct xfs_mount *mp = ip->i_mount;
1306 struct xfs_trans *tp;
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001307 struct xfs_dquot *pdqp = NULL;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001308 struct xfs_dquot *olddquot = NULL;
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001309 int error;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001310
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001311 trace_xfs_ioctl_setattr(ip);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001312
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001313 if (d_is_special(dentry))
1314 return -ENOTTY;
1315
1316 if (!fa->fsx_valid) {
1317 if (fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL |
1318 FS_NOATIME_FL | FS_NODUMP_FL |
1319 FS_SYNC_FL | FS_DAX_FL | FS_PROJINHERIT_FL))
1320 return -EOPNOTSUPP;
1321 }
1322
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001323 error = xfs_ioctl_setattr_check_projid(ip, fa);
1324 if (error)
1325 return error;
Arkadiusz Mi?kiewicz23963e542010-08-26 10:19:43 +00001326
1327 /*
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001328 * If disk quotas is on, we make sure that the dquots do exist on disk,
1329 * before we start any other transactions. Trying to do this later
1330 * is messy. We don't care to take a readlock to look at the ids
1331 * in inode here, because we can't hold it across the trans_reserve.
1332 * If the IDs do change before we take the ilock, we're covered
1333 * because the i_*dquot fields will get updated anyway.
1334 */
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001335 if (fa->fsx_valid && XFS_IS_QUOTA_ON(mp)) {
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001336 error = xfs_qm_vop_dqalloc(ip, VFS_I(ip)->i_uid,
Christoph Hellwig54295152020-02-21 08:31:27 -08001337 VFS_I(ip)->i_gid, fa->fsx_projid,
Kaixu Xiaea1c9042020-04-22 21:54:29 -07001338 XFS_QMOPT_PQUOTA, NULL, NULL, &pdqp);
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001339 if (error)
1340 return error;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001341 }
1342
Ira Weinye4f9ba22020-04-30 07:41:38 -07001343 xfs_ioctl_setattr_prepare_dax(ip, fa);
Dave Chinner3a6a854a2016-03-01 09:41:33 +11001344
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001345 tp = xfs_ioctl_setattr_get_trans(ip, pdqp);
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001346 if (IS_ERR(tp)) {
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001347 error = PTR_ERR(tp);
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001348 goto error_free_dquots;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001349 }
1350
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001351 error = xfs_ioctl_setattr_check_extsize(ip, fa);
1352 if (error)
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001353 goto error_trans_cancel;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001354
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001355 error = xfs_ioctl_setattr_check_cowextsize(ip, fa);
1356 if (error)
Darrick J. Wongf7ca3522016-10-03 09:11:43 -07001357 goto error_trans_cancel;
1358
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001359 error = xfs_ioctl_setattr_xflags(tp, ip, fa);
1360 if (error)
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001361 goto error_trans_cancel;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001362
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001363 if (!fa->fsx_valid)
1364 goto skip_xattr;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001365 /*
Dave Chinnerfd179b92015-02-02 10:16:25 +11001366 * Change file ownership. Must be the owner or privileged. CAP_FSETID
1367 * overrides the following restrictions:
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001368 *
Dave Chinnerfd179b92015-02-02 10:16:25 +11001369 * The set-user-ID and set-group-ID bits of a file will be cleared upon
1370 * successful return from chown()
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001371 */
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001372
Dave Chinnerc19b3b052016-02-09 16:54:58 +11001373 if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) &&
Christoph Hellwigf736d932021-01-21 14:19:58 +01001374 !capable_wrt_inode_uidgid(mnt_userns, VFS_I(ip), CAP_FSETID))
Dave Chinnerc19b3b052016-02-09 16:54:58 +11001375 VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID);
Dave Chinnerfd179b92015-02-02 10:16:25 +11001376
1377 /* Change the ownerships and register project quota modifications */
Christoph Hellwigceaf6032021-03-29 11:11:39 -07001378 if (ip->i_projid != fa->fsx_projid) {
Christoph Hellwig149e53a2021-08-06 11:05:37 -07001379 if (XFS_IS_PQUOTA_ON(mp)) {
Dave Chinnerfd179b92015-02-02 10:16:25 +11001380 olddquot = xfs_qm_vop_chown(tp, ip,
1381 &ip->i_pdquot, pdqp);
Dwight Engenfd5e2aa2013-08-15 14:08:00 -04001382 }
Christoph Hellwigceaf6032021-03-29 11:11:39 -07001383 ip->i_projid = fa->fsx_projid;
Christoph Hellwigf13fae22008-07-21 16:16:15 +10001384 }
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001385
Dave Chinnera8727032014-10-02 09:20:30 +10001386 /*
1387 * Only set the extent size hint if we've already determined that the
1388 * extent size hint should be set on the inode. If no extent size flags
1389 * are set on the inode then unconditionally clear the extent size hint.
1390 */
Christoph Hellwigdb073492021-03-29 11:11:44 -07001391 if (ip->i_diflags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT))
Christoph Hellwigb231b122021-03-29 11:11:43 -07001392 ip->i_extsize = XFS_B_TO_FSB(mp, fa->fsx_extsize);
Dave Chinnerfd179b92015-02-02 10:16:25 +11001393 else
Christoph Hellwig031474c2021-03-29 11:11:41 -07001394 ip->i_extsize = 0;
Christoph Hellwigee7b83f2021-03-29 11:11:43 -07001395
Dave Chinner38c26bf2021-08-18 18:46:37 -07001396 if (xfs_has_v3inodes(mp)) {
Christoph Hellwig3e09ab82021-03-29 11:11:45 -07001397 if (ip->i_diflags2 & XFS_DIFLAG2_COWEXTSIZE)
Christoph Hellwigee7b83f2021-03-29 11:11:43 -07001398 ip->i_cowextsize = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
1399 else
1400 ip->i_cowextsize = 0;
1401 }
Dave Chinnera8727032014-10-02 09:20:30 +10001402
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001403skip_xattr:
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001404 error = xfs_trans_commit(tp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001405
1406 /*
1407 * Release any dquot(s) the inode had kept before chown.
1408 */
Christoph Hellwig7d095252009-06-08 15:33:32 +02001409 xfs_qm_dqrele(olddquot);
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001410 xfs_qm_dqrele(pdqp);
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001411
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001412 return error;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001413
Dave Chinnerd4388d3c2015-02-02 10:22:20 +11001414error_trans_cancel:
Christoph Hellwig4906e212015-06-04 13:47:56 +10001415 xfs_trans_cancel(tp);
Dave Chinner8f3d17a2015-02-02 10:15:35 +11001416error_free_dquots:
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -05001417 xfs_qm_dqrele(pdqp);
Darrick J. Wongfea7aae2021-01-29 17:14:33 -08001418 return error;
Christoph Hellwig25fe55e2008-07-18 17:13:20 +10001419}
1420
Christoph Hellwig232b51942017-10-17 14:16:19 -07001421static bool
1422xfs_getbmap_format(
1423 struct kgetbmap *p,
1424 struct getbmapx __user *u,
1425 size_t recsize)
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001426{
Christoph Hellwig232b51942017-10-17 14:16:19 -07001427 if (put_user(p->bmv_offset, &u->bmv_offset) ||
1428 put_user(p->bmv_block, &u->bmv_block) ||
1429 put_user(p->bmv_length, &u->bmv_length) ||
1430 put_user(0, &u->bmv_count) ||
1431 put_user(0, &u->bmv_entries))
1432 return false;
1433 if (recsize < sizeof(struct getbmapx))
1434 return true;
1435 if (put_user(0, &u->bmv_iflags) ||
1436 put_user(p->bmv_oflags, &u->bmv_oflags) ||
1437 put_user(0, &u->bmv_unused1) ||
1438 put_user(0, &u->bmv_unused2))
1439 return false;
1440 return true;
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001441}
1442
1443STATIC int
Linus Torvalds1da177e2005-04-16 15:20:36 -07001444xfs_ioc_getbmap(
Christoph Hellwig8f3e2052016-07-20 11:29:35 +10001445 struct file *file,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001446 unsigned int cmd,
1447 void __user *arg)
1448{
Darrick J. Wongbe6324c2017-04-03 15:17:57 -07001449 struct getbmapx bmx = { 0 };
Christoph Hellwig232b51942017-10-17 14:16:19 -07001450 struct kgetbmap *buf;
1451 size_t recsize;
1452 int error, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001453
Christoph Hellwig232b51942017-10-17 14:16:19 -07001454 switch (cmd) {
1455 case XFS_IOC_GETBMAPA:
1456 bmx.bmv_iflags = BMV_IF_ATTRFORK;
Gustavo A. R. Silva53004ee2021-04-20 17:54:36 -05001457 fallthrough;
Christoph Hellwig232b51942017-10-17 14:16:19 -07001458 case XFS_IOC_GETBMAP:
Christoph Hellwig232b51942017-10-17 14:16:19 -07001459 /* struct getbmap is a strict subset of struct getbmapx. */
1460 recsize = sizeof(struct getbmap);
1461 break;
1462 case XFS_IOC_GETBMAPX:
1463 recsize = sizeof(struct getbmapx);
1464 break;
1465 default:
1466 return -EINVAL;
1467 }
1468
1469 if (copy_from_user(&bmx, arg, recsize))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001470 return -EFAULT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001471
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001472 if (bmx.bmv_count < 2)
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001473 return -EINVAL;
Darrick J. Wong29d650f2022-01-24 15:48:31 -08001474 if (bmx.bmv_count >= INT_MAX / recsize)
Christoph Hellwig232b51942017-10-17 14:16:19 -07001475 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001476
Gustavo A. R. Silvac2e4e3b2021-09-28 17:33:07 -05001477 buf = kvcalloc(bmx.bmv_count, sizeof(*buf), GFP_KERNEL);
Christoph Hellwig232b51942017-10-17 14:16:19 -07001478 if (!buf)
1479 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001480
Christoph Hellwig232b51942017-10-17 14:16:19 -07001481 error = xfs_getbmap(XFS_I(file_inode(file)), &bmx, buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001482 if (error)
Christoph Hellwig232b51942017-10-17 14:16:19 -07001483 goto out_free_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001484
Christoph Hellwig232b51942017-10-17 14:16:19 -07001485 error = -EFAULT;
1486 if (copy_to_user(arg, &bmx, recsize))
1487 goto out_free_buf;
1488 arg += recsize;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
Christoph Hellwig232b51942017-10-17 14:16:19 -07001490 for (i = 0; i < bmx.bmv_entries; i++) {
1491 if (!xfs_getbmap_format(buf + i, arg, recsize))
1492 goto out_free_buf;
1493 arg += recsize;
1494 }
Eric Sandeen8a7141a2008-11-28 14:23:35 +11001495
Christoph Hellwig232b51942017-10-17 14:16:19 -07001496 error = 0;
1497out_free_buf:
1498 kmem_free(buf);
Christophe JAILLET132bf672018-11-06 07:50:50 -08001499 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001500}
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001501
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001502STATIC int
1503xfs_ioc_getfsmap(
1504 struct xfs_inode *ip,
Christoph Hellwig9d17e142017-04-21 11:24:41 -07001505 struct fsmap_head __user *arg)
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001506{
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001507 struct xfs_fsmap_head xhead = {0};
1508 struct fsmap_head head;
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001509 struct fsmap *recs;
1510 unsigned int count;
1511 __u32 last_flags = 0;
1512 bool done = false;
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001513 int error;
1514
1515 if (copy_from_user(&head, arg, sizeof(struct fsmap_head)))
1516 return -EFAULT;
1517 if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) ||
1518 memchr_inv(head.fmh_keys[0].fmr_reserved, 0,
1519 sizeof(head.fmh_keys[0].fmr_reserved)) ||
1520 memchr_inv(head.fmh_keys[1].fmr_reserved, 0,
1521 sizeof(head.fmh_keys[1].fmr_reserved)))
1522 return -EINVAL;
1523
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001524 /*
1525 * Use an internal memory buffer so that we don't have to copy fsmap
1526 * data to userspace while holding locks. Start by trying to allocate
1527 * up to 128k for the buffer, but fall back to a single page if needed.
1528 */
1529 count = min_t(unsigned int, head.fmh_count,
1530 131072 / sizeof(struct fsmap));
Gustavo A. R. Silvac2e4e3b2021-09-28 17:33:07 -05001531 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001532 if (!recs) {
1533 count = min_t(unsigned int, head.fmh_count,
1534 PAGE_SIZE / sizeof(struct fsmap));
Gustavo A. R. Silvac2e4e3b2021-09-28 17:33:07 -05001535 recs = kvcalloc(count, sizeof(struct fsmap), GFP_KERNEL);
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001536 if (!recs)
1537 return -ENOMEM;
1538 }
1539
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001540 xhead.fmh_iflags = head.fmh_iflags;
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001541 xfs_fsmap_to_internal(&xhead.fmh_keys[0], &head.fmh_keys[0]);
1542 xfs_fsmap_to_internal(&xhead.fmh_keys[1], &head.fmh_keys[1]);
1543
1544 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1545 trace_xfs_getfsmap_high_key(ip->i_mount, &xhead.fmh_keys[1]);
1546
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001547 head.fmh_entries = 0;
1548 do {
1549 struct fsmap __user *user_recs;
1550 struct fsmap *last_rec;
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001551
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001552 user_recs = &arg->fmh_recs[head.fmh_entries];
1553 xhead.fmh_entries = 0;
1554 xhead.fmh_count = min_t(unsigned int, count,
1555 head.fmh_count - head.fmh_entries);
1556
1557 /* Run query, record how many entries we got. */
1558 error = xfs_getfsmap(ip->i_mount, &xhead, recs);
1559 switch (error) {
1560 case 0:
1561 /*
1562 * There are no more records in the result set. Copy
1563 * whatever we got to userspace and break out.
1564 */
1565 done = true;
1566 break;
1567 case -ECANCELED:
1568 /*
1569 * The internal memory buffer is full. Copy whatever
1570 * records we got to userspace and go again if we have
1571 * not yet filled the userspace buffer.
1572 */
1573 error = 0;
1574 break;
1575 default:
1576 goto out_free;
1577 }
1578 head.fmh_entries += xhead.fmh_entries;
1579 head.fmh_oflags = xhead.fmh_oflags;
1580
1581 /*
1582 * If the caller wanted a record count or there aren't any
1583 * new records to return, we're done.
1584 */
1585 if (head.fmh_count == 0 || xhead.fmh_entries == 0)
1586 break;
1587
1588 /* Copy all the records we got out to userspace. */
1589 if (copy_to_user(user_recs, recs,
1590 xhead.fmh_entries * sizeof(struct fsmap))) {
1591 error = -EFAULT;
1592 goto out_free;
1593 }
1594
1595 /* Remember the last record flags we copied to userspace. */
1596 last_rec = &recs[xhead.fmh_entries - 1];
1597 last_flags = last_rec->fmr_flags;
1598
1599 /* Set up the low key for the next iteration. */
1600 xfs_fsmap_to_internal(&xhead.fmh_keys[0], last_rec);
1601 trace_xfs_getfsmap_low_key(ip->i_mount, &xhead.fmh_keys[0]);
1602 } while (!done && head.fmh_entries < head.fmh_count);
1603
1604 /*
1605 * If there are no more records in the query result set and we're not
1606 * in counting mode, mark the last record returned with the LAST flag.
1607 */
1608 if (done && head.fmh_count > 0 && head.fmh_entries > 0) {
1609 struct fsmap __user *user_rec;
1610
1611 last_flags |= FMR_OF_LAST;
1612 user_rec = &arg->fmh_recs[head.fmh_entries - 1];
1613
1614 if (copy_to_user(&user_rec->fmr_flags, &last_flags,
1615 sizeof(last_flags))) {
1616 error = -EFAULT;
1617 goto out_free;
1618 }
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001619 }
1620
1621 /* copy back header */
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001622 if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) {
1623 error = -EFAULT;
1624 goto out_free;
1625 }
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001626
Darrick J. Wong8ffa90e2020-10-01 10:56:07 -07001627out_free:
1628 kmem_free(recs);
1629 return error;
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001630}
1631
Darrick J. Wong36fd6e82017-10-17 21:37:34 -07001632STATIC int
1633xfs_ioc_scrub_metadata(
Darrick J. Wong71bddbc2021-03-22 09:51:51 -07001634 struct file *file,
Darrick J. Wong36fd6e82017-10-17 21:37:34 -07001635 void __user *arg)
1636{
1637 struct xfs_scrub_metadata scrub;
1638 int error;
1639
1640 if (!capable(CAP_SYS_ADMIN))
1641 return -EPERM;
1642
1643 if (copy_from_user(&scrub, arg, sizeof(scrub)))
1644 return -EFAULT;
1645
Darrick J. Wong71bddbc2021-03-22 09:51:51 -07001646 error = xfs_scrub_metadata(file, &scrub);
Darrick J. Wong36fd6e82017-10-17 21:37:34 -07001647 if (error)
1648 return error;
1649
1650 if (copy_to_user(arg, &scrub, sizeof(scrub)))
1651 return -EFAULT;
1652
1653 return 0;
1654}
1655
Dave Chinnera133d952013-08-12 20:49:48 +10001656int
1657xfs_ioc_swapext(
1658 xfs_swapext_t *sxp)
1659{
1660 xfs_inode_t *ip, *tip;
1661 struct fd f, tmp;
1662 int error = 0;
1663
1664 /* Pull information for the target fd */
1665 f = fdget((int)sxp->sx_fdtarget);
1666 if (!f.file) {
Dave Chinner24513372014-06-25 14:58:08 +10001667 error = -EINVAL;
Dave Chinnera133d952013-08-12 20:49:48 +10001668 goto out;
1669 }
1670
1671 if (!(f.file->f_mode & FMODE_WRITE) ||
1672 !(f.file->f_mode & FMODE_READ) ||
1673 (f.file->f_flags & O_APPEND)) {
Dave Chinner24513372014-06-25 14:58:08 +10001674 error = -EBADF;
Dave Chinnera133d952013-08-12 20:49:48 +10001675 goto out_put_file;
1676 }
1677
1678 tmp = fdget((int)sxp->sx_fdtmp);
1679 if (!tmp.file) {
Dave Chinner24513372014-06-25 14:58:08 +10001680 error = -EINVAL;
Dave Chinnera133d952013-08-12 20:49:48 +10001681 goto out_put_file;
1682 }
1683
1684 if (!(tmp.file->f_mode & FMODE_WRITE) ||
1685 !(tmp.file->f_mode & FMODE_READ) ||
1686 (tmp.file->f_flags & O_APPEND)) {
Dave Chinner24513372014-06-25 14:58:08 +10001687 error = -EBADF;
Dave Chinnera133d952013-08-12 20:49:48 +10001688 goto out_put_tmp_file;
1689 }
1690
1691 if (IS_SWAPFILE(file_inode(f.file)) ||
1692 IS_SWAPFILE(file_inode(tmp.file))) {
Dave Chinner24513372014-06-25 14:58:08 +10001693 error = -EINVAL;
Dave Chinnera133d952013-08-12 20:49:48 +10001694 goto out_put_tmp_file;
1695 }
1696
Jann Horn7f1b6242016-07-20 10:30:30 +10001697 /*
1698 * We need to ensure that the fds passed in point to XFS inodes
1699 * before we cast and access them as XFS structures as we have no
1700 * control over what the user passes us here.
1701 */
1702 if (f.file->f_op != &xfs_file_operations ||
1703 tmp.file->f_op != &xfs_file_operations) {
1704 error = -EINVAL;
1705 goto out_put_tmp_file;
1706 }
1707
Dave Chinnera133d952013-08-12 20:49:48 +10001708 ip = XFS_I(file_inode(f.file));
1709 tip = XFS_I(file_inode(tmp.file));
1710
1711 if (ip->i_mount != tip->i_mount) {
Dave Chinner24513372014-06-25 14:58:08 +10001712 error = -EINVAL;
Dave Chinnera133d952013-08-12 20:49:48 +10001713 goto out_put_tmp_file;
1714 }
1715
1716 if (ip->i_ino == tip->i_ino) {
Dave Chinner24513372014-06-25 14:58:08 +10001717 error = -EINVAL;
Dave Chinnera133d952013-08-12 20:49:48 +10001718 goto out_put_tmp_file;
1719 }
1720
Dave Chinner75c8c50f2021-08-18 18:46:53 -07001721 if (xfs_is_shutdown(ip->i_mount)) {
Dave Chinner24513372014-06-25 14:58:08 +10001722 error = -EIO;
Dave Chinnera133d952013-08-12 20:49:48 +10001723 goto out_put_tmp_file;
1724 }
1725
1726 error = xfs_swap_extents(ip, tip, sxp);
1727
1728 out_put_tmp_file:
1729 fdput(tmp);
1730 out_put_file:
1731 fdput(f);
1732 out:
1733 return error;
1734}
1735
Eric Sandeenf7664b32018-05-15 13:21:48 -07001736static int
1737xfs_ioc_getlabel(
1738 struct xfs_mount *mp,
1739 char __user *user_label)
1740{
1741 struct xfs_sb *sbp = &mp->m_sb;
1742 char label[XFSLABEL_MAX + 1];
1743
1744 /* Paranoia */
1745 BUILD_BUG_ON(sizeof(sbp->sb_fname) > FSLABEL_MAX);
1746
Arnd Bergmann4bb8b652018-06-05 19:42:45 -07001747 /* 1 larger than sb_fname, so this ensures a trailing NUL char */
1748 memset(label, 0, sizeof(label));
Eric Sandeenf7664b32018-05-15 13:21:48 -07001749 spin_lock(&mp->m_sb_lock);
Arnd Bergmann4bb8b652018-06-05 19:42:45 -07001750 strncpy(label, sbp->sb_fname, XFSLABEL_MAX);
Eric Sandeenf7664b32018-05-15 13:21:48 -07001751 spin_unlock(&mp->m_sb_lock);
1752
Arnd Bergmann4bb8b652018-06-05 19:42:45 -07001753 if (copy_to_user(user_label, label, sizeof(label)))
Eric Sandeenf7664b32018-05-15 13:21:48 -07001754 return -EFAULT;
1755 return 0;
1756}
1757
1758static int
1759xfs_ioc_setlabel(
1760 struct file *filp,
1761 struct xfs_mount *mp,
1762 char __user *newlabel)
1763{
1764 struct xfs_sb *sbp = &mp->m_sb;
1765 char label[XFSLABEL_MAX + 1];
1766 size_t len;
1767 int error;
1768
1769 if (!capable(CAP_SYS_ADMIN))
1770 return -EPERM;
1771 /*
1772 * The generic ioctl allows up to FSLABEL_MAX chars, but XFS is much
1773 * smaller, at 12 bytes. We copy one more to be sure we find the
1774 * (required) NULL character to test the incoming label length.
1775 * NB: The on disk label doesn't need to be null terminated.
1776 */
1777 if (copy_from_user(label, newlabel, XFSLABEL_MAX + 1))
1778 return -EFAULT;
1779 len = strnlen(label, XFSLABEL_MAX + 1);
1780 if (len > sizeof(sbp->sb_fname))
1781 return -EINVAL;
1782
1783 error = mnt_want_write_file(filp);
1784 if (error)
1785 return error;
1786
1787 spin_lock(&mp->m_sb_lock);
1788 memset(sbp->sb_fname, 0, sizeof(sbp->sb_fname));
Arnd Bergmann4bb8b652018-06-05 19:42:45 -07001789 memcpy(sbp->sb_fname, label, len);
Eric Sandeenf7664b32018-05-15 13:21:48 -07001790 spin_unlock(&mp->m_sb_lock);
1791
1792 /*
1793 * Now we do several things to satisfy userspace.
1794 * In addition to normal logging of the primary superblock, we also
1795 * immediately write these changes to sector zero for the primary, then
1796 * update all backup supers (as xfs_db does for a label change), then
1797 * invalidate the block device page cache. This is so that any prior
1798 * buffered reads from userspace (i.e. from blkid) are invalidated,
1799 * and userspace will see the newly-written label.
1800 */
1801 error = xfs_sync_sb_buf(mp);
1802 if (error)
1803 goto out;
1804 /*
1805 * growfs also updates backup supers so lock against that.
1806 */
1807 mutex_lock(&mp->m_growlock);
1808 error = xfs_update_secondary_sbs(mp);
1809 mutex_unlock(&mp->m_growlock);
1810
1811 invalidate_bdev(mp->m_ddev_targp->bt_bdev);
1812
1813out:
1814 mnt_drop_write_file(filp);
1815 return error;
1816}
1817
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001818static inline int
1819xfs_fs_eofblocks_from_user(
1820 struct xfs_fs_eofblocks *src,
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001821 struct xfs_icwalk *dst)
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001822{
1823 if (src->eof_version != XFS_EOFBLOCKS_VERSION)
1824 return -EINVAL;
1825
1826 if (src->eof_flags & ~XFS_EOF_FLAGS_VALID)
1827 return -EINVAL;
1828
1829 if (memchr_inv(&src->pad32, 0, sizeof(src->pad32)) ||
1830 memchr_inv(src->pad64, 0, sizeof(src->pad64)))
1831 return -EINVAL;
1832
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001833 dst->icw_flags = 0;
Darrick J. Wong2d53f66b2021-06-07 09:34:51 -07001834 if (src->eof_flags & XFS_EOF_FLAGS_SYNC)
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001835 dst->icw_flags |= XFS_ICWALK_FLAG_SYNC;
Darrick J. Wong2d53f66b2021-06-07 09:34:51 -07001836 if (src->eof_flags & XFS_EOF_FLAGS_UID)
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001837 dst->icw_flags |= XFS_ICWALK_FLAG_UID;
Darrick J. Wong2d53f66b2021-06-07 09:34:51 -07001838 if (src->eof_flags & XFS_EOF_FLAGS_GID)
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001839 dst->icw_flags |= XFS_ICWALK_FLAG_GID;
Darrick J. Wong2d53f66b2021-06-07 09:34:51 -07001840 if (src->eof_flags & XFS_EOF_FLAGS_PRID)
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001841 dst->icw_flags |= XFS_ICWALK_FLAG_PRID;
Darrick J. Wong2d53f66b2021-06-07 09:34:51 -07001842 if (src->eof_flags & XFS_EOF_FLAGS_MINFILESIZE)
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001843 dst->icw_flags |= XFS_ICWALK_FLAG_MINFILESIZE;
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001844
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001845 dst->icw_prid = src->eof_prid;
1846 dst->icw_min_file_size = src->eof_min_file_size;
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001847
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001848 dst->icw_uid = INVALID_UID;
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001849 if (src->eof_flags & XFS_EOF_FLAGS_UID) {
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001850 dst->icw_uid = make_kuid(current_user_ns(), src->eof_uid);
1851 if (!uid_valid(dst->icw_uid))
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001852 return -EINVAL;
1853 }
1854
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001855 dst->icw_gid = INVALID_GID;
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001856 if (src->eof_flags & XFS_EOF_FLAGS_GID) {
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07001857 dst->icw_gid = make_kgid(current_user_ns(), src->eof_gid);
1858 if (!gid_valid(dst->icw_gid))
Darrick J. Wong3737bb22020-05-21 13:08:46 -07001859 return -EINVAL;
1860 }
1861 return 0;
1862}
1863
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001864/*
Darrick J. Wongb3bb9412021-12-21 13:07:38 -08001865 * These long-unused ioctls were removed from the official ioctl API in 5.17,
1866 * but retain these definitions so that we can log warnings about them.
1867 */
1868#define XFS_IOC_ALLOCSP _IOW ('X', 10, struct xfs_flock64)
1869#define XFS_IOC_FREESP _IOW ('X', 11, struct xfs_flock64)
1870#define XFS_IOC_ALLOCSP64 _IOW ('X', 36, struct xfs_flock64)
1871#define XFS_IOC_FREESP64 _IOW ('X', 37, struct xfs_flock64)
1872
1873/*
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001874 * Note: some of the ioctl's return positive numbers as a
1875 * byte count indicating success, such as readlink_by_handle.
1876 * So we don't "sign flip" like most other routines. This means
1877 * true errors need to be returned as a negative value.
1878 */
1879long
1880xfs_file_ioctl(
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001881 struct file *filp,
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001882 unsigned int cmd,
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001883 unsigned long p)
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001884{
Al Viro496ad9a2013-01-23 17:07:38 -05001885 struct inode *inode = file_inode(filp);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001886 struct xfs_inode *ip = XFS_I(inode);
1887 struct xfs_mount *mp = ip->i_mount;
1888 void __user *arg = (void __user *)p;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001889 int error;
1890
Christoph Hellwigcca28fb2010-06-24 11:57:09 +10001891 trace_xfs_file_ioctl(ip);
Christoph Hellwig4d4be482008-12-09 04:47:33 -05001892
1893 switch (cmd) {
Christoph Hellwiga46db602011-01-07 13:02:04 +00001894 case FITRIM:
1895 return xfs_ioc_trim(mp, arg);
Eric Sandeenf7664b32018-05-15 13:21:48 -07001896 case FS_IOC_GETFSLABEL:
1897 return xfs_ioc_getlabel(mp, arg);
1898 case FS_IOC_SETFSLABEL:
1899 return xfs_ioc_setlabel(filp, mp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001900 case XFS_IOC_ALLOCSP:
1901 case XFS_IOC_FREESP:
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001902 case XFS_IOC_ALLOCSP64:
Darrick J. Wong4d1b97f2022-01-07 17:45:51 -08001903 case XFS_IOC_FREESP64:
1904 xfs_warn_once(mp,
1905 "%s should use fallocate; XFS_IOC_{ALLOC,FREE}SP ioctl unsupported",
1906 current->comm);
1907 return -ENOTTY;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001908 case XFS_IOC_DIOINFO: {
Christoph Hellwigc7d68312019-10-24 22:25:39 -07001909 struct xfs_buftarg *target = xfs_inode_buftarg(ip);
1910 struct dioattr da;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001911
Eric Sandeen7c71ee72014-01-21 16:46:23 -06001912 da.d_mem = da.d_miniosz = target->bt_logical_sectorsize;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001913 da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1);
1914
1915 if (copy_to_user(arg, &da, sizeof(da)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001916 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001917 return 0;
1918 }
1919
1920 case XFS_IOC_FSBULKSTAT_SINGLE:
1921 case XFS_IOC_FSBULKSTAT:
1922 case XFS_IOC_FSINUMBERS:
Christoph Hellwigf736d932021-01-21 14:19:58 +01001923 return xfs_ioc_fsbulkstat(filp, cmd, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001924
Darrick J. Wong0448b6f2019-07-03 20:36:27 -07001925 case XFS_IOC_BULKSTAT:
Christoph Hellwigf736d932021-01-21 14:19:58 +01001926 return xfs_ioc_bulkstat(filp, cmd, arg);
Darrick J. Wongfba97602019-07-03 20:36:28 -07001927 case XFS_IOC_INUMBERS:
1928 return xfs_ioc_inumbers(mp, cmd, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001929
1930 case XFS_IOC_FSGEOMETRY_V1:
Dave Chinner1b6d9682019-04-12 07:41:16 -07001931 return xfs_ioc_fsgeometry(mp, arg, 3);
1932 case XFS_IOC_FSGEOMETRY_V4:
1933 return xfs_ioc_fsgeometry(mp, arg, 4);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001934 case XFS_IOC_FSGEOMETRY:
Dave Chinner1b6d9682019-04-12 07:41:16 -07001935 return xfs_ioc_fsgeometry(mp, arg, 5);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001936
Darrick J. Wong7cd50062019-04-12 07:41:17 -07001937 case XFS_IOC_AG_GEOMETRY:
1938 return xfs_ioc_ag_geometry(mp, arg);
1939
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001940 case XFS_IOC_GETVERSION:
1941 return put_user(inode->i_generation, (int __user *)arg);
1942
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001943 case XFS_IOC_FSGETXATTRA:
Miklos Szeredi9fefd5d2021-04-07 14:36:43 +02001944 return xfs_ioc_fsgetxattra(ip, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001945
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001946 case XFS_IOC_GETBMAP:
1947 case XFS_IOC_GETBMAPA:
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001948 case XFS_IOC_GETBMAPX:
Christoph Hellwig232b51942017-10-17 14:16:19 -07001949 return xfs_ioc_getbmap(filp, cmd, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001950
Darrick J. Wonge89c0412017-03-28 14:56:37 -07001951 case FS_IOC_GETFSMAP:
1952 return xfs_ioc_getfsmap(ip, arg);
1953
Darrick J. Wong36fd6e82017-10-17 21:37:34 -07001954 case XFS_IOC_SCRUB_METADATA:
Darrick J. Wong71bddbc2021-03-22 09:51:51 -07001955 return xfs_ioc_scrub_metadata(filp, arg);
Darrick J. Wong36fd6e82017-10-17 21:37:34 -07001956
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001957 case XFS_IOC_FD_TO_HANDLE:
1958 case XFS_IOC_PATH_TO_HANDLE:
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001959 case XFS_IOC_PATH_TO_FSHANDLE: {
1960 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001961
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001962 if (copy_from_user(&hreq, arg, sizeof(hreq)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001963 return -EFAULT;
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001964 return xfs_find_handle(cmd, &hreq);
1965 }
1966 case XFS_IOC_OPEN_BY_HANDLE: {
1967 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001968
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001969 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001970 return -EFAULT;
Christoph Hellwigd296d302009-01-19 02:02:57 +01001971 return xfs_open_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001972 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001973
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001974 case XFS_IOC_READLINK_BY_HANDLE: {
1975 xfs_fsop_handlereq_t hreq;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001976
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001977 if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001978 return -EFAULT;
Christoph Hellwigd296d302009-01-19 02:02:57 +01001979 return xfs_readlink_by_handle(filp, &hreq);
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001980 }
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001981 case XFS_IOC_ATTRLIST_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001982 return xfs_attrlist_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001983
1984 case XFS_IOC_ATTRMULTI_BY_HANDLE:
Christoph Hellwigd296d302009-01-19 02:02:57 +01001985 return xfs_attrmulti_by_handle(filp, arg);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001986
1987 case XFS_IOC_SWAPEXT: {
sandeen@sandeen.net743bb4652008-11-25 21:20:06 -06001988 struct xfs_swapext sxp;
1989
1990 if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10001991 return -EFAULT;
Jan Karad9457dc2012-06-12 16:20:39 +02001992 error = mnt_want_write_file(filp);
1993 if (error)
1994 return error;
Dave Chinnera133d952013-08-12 20:49:48 +10001995 error = xfs_ioc_swapext(&sxp);
Jan Karad9457dc2012-06-12 16:20:39 +02001996 mnt_drop_write_file(filp);
Dave Chinner24513372014-06-25 14:58:08 +10001997 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10001998 }
1999
2000 case XFS_IOC_FSCOUNTS: {
2001 xfs_fsop_counts_t out;
2002
Eric Sandeen91083262019-05-01 20:26:30 -07002003 xfs_fs_counts(mp, &out);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002004
2005 if (copy_to_user(arg, &out, sizeof(out)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002006 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002007 return 0;
2008 }
2009
2010 case XFS_IOC_SET_RESBLKS: {
2011 xfs_fsop_resblks_t inout;
Darrick J. Wongc8ce5402017-06-16 11:00:05 -07002012 uint64_t in;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002013
2014 if (!capable(CAP_SYS_ADMIN))
2015 return -EPERM;
2016
Dave Chinner2e973b22021-08-18 18:46:52 -07002017 if (xfs_is_readonly(mp))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002018 return -EROFS;
Eric Sandeend5db0f92010-02-05 22:59:53 +00002019
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002020 if (copy_from_user(&inout, arg, sizeof(inout)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002021 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002022
Jan Karad9457dc2012-06-12 16:20:39 +02002023 error = mnt_want_write_file(filp);
2024 if (error)
2025 return error;
2026
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002027 /* input parameter is passed in resblks field of structure */
2028 in = inout.resblks;
2029 error = xfs_reserve_blocks(mp, &in, &inout);
Jan Karad9457dc2012-06-12 16:20:39 +02002030 mnt_drop_write_file(filp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002031 if (error)
Dave Chinner24513372014-06-25 14:58:08 +10002032 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002033
2034 if (copy_to_user(arg, &inout, sizeof(inout)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002035 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002036 return 0;
2037 }
2038
2039 case XFS_IOC_GET_RESBLKS: {
2040 xfs_fsop_resblks_t out;
2041
2042 if (!capable(CAP_SYS_ADMIN))
2043 return -EPERM;
2044
2045 error = xfs_reserve_blocks(mp, NULL, &out);
2046 if (error)
Dave Chinner24513372014-06-25 14:58:08 +10002047 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002048
2049 if (copy_to_user(arg, &out, sizeof(out)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002050 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002051
2052 return 0;
2053 }
2054
2055 case XFS_IOC_FSGROWFSDATA: {
Gao Xiang07aabd92021-02-02 18:24:06 -08002056 struct xfs_growfs_data in;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002057
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002058 if (copy_from_user(&in, arg, sizeof(in)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002059 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002060
Jan Karad9457dc2012-06-12 16:20:39 +02002061 error = mnt_want_write_file(filp);
2062 if (error)
2063 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002064 error = xfs_growfs_data(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02002065 mnt_drop_write_file(filp);
Dave Chinner24513372014-06-25 14:58:08 +10002066 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002067 }
2068
2069 case XFS_IOC_FSGROWFSLOG: {
Gao Xiang07aabd92021-02-02 18:24:06 -08002070 struct xfs_growfs_log in;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002071
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002072 if (copy_from_user(&in, arg, sizeof(in)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002073 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002074
Jan Karad9457dc2012-06-12 16:20:39 +02002075 error = mnt_want_write_file(filp);
2076 if (error)
2077 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002078 error = xfs_growfs_log(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02002079 mnt_drop_write_file(filp);
Dave Chinner24513372014-06-25 14:58:08 +10002080 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002081 }
2082
2083 case XFS_IOC_FSGROWFSRT: {
2084 xfs_growfs_rt_t in;
2085
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002086 if (copy_from_user(&in, arg, sizeof(in)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002087 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002088
Jan Karad9457dc2012-06-12 16:20:39 +02002089 error = mnt_want_write_file(filp);
2090 if (error)
2091 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002092 error = xfs_growfs_rt(mp, &in);
Jan Karad9457dc2012-06-12 16:20:39 +02002093 mnt_drop_write_file(filp);
Dave Chinner24513372014-06-25 14:58:08 +10002094 return error;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002095 }
2096
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002097 case XFS_IOC_GOINGDOWN: {
Darrick J. Wongc8ce5402017-06-16 11:00:05 -07002098 uint32_t in;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002099
2100 if (!capable(CAP_SYS_ADMIN))
2101 return -EPERM;
2102
Darrick J. Wongc8ce5402017-06-16 11:00:05 -07002103 if (get_user(in, (uint32_t __user *)arg))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002104 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002105
Dave Chinner24513372014-06-25 14:58:08 +10002106 return xfs_fs_goingdown(mp, in);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002107 }
2108
2109 case XFS_IOC_ERROR_INJECTION: {
2110 xfs_error_injection_t in;
2111
2112 if (!capable(CAP_SYS_ADMIN))
2113 return -EPERM;
2114
2115 if (copy_from_user(&in, arg, sizeof(in)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002116 return -EFAULT;
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002117
Darrick J. Wong31965ef2017-06-20 17:54:46 -07002118 return xfs_errortag_add(mp, in.errtag);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002119 }
2120
2121 case XFS_IOC_ERROR_CLEARALL:
2122 if (!capable(CAP_SYS_ADMIN))
2123 return -EPERM;
2124
Darrick J. Wong31965ef2017-06-20 17:54:46 -07002125 return xfs_errortag_clearall(mp);
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002126
Brian Foster8ca149d2012-11-07 12:21:12 -05002127 case XFS_IOC_FREE_EOFBLOCKS: {
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07002128 struct xfs_fs_eofblocks eofb;
2129 struct xfs_icwalk icw;
Brian Foster8ca149d2012-11-07 12:21:12 -05002130
Dwight Engen8c567a72013-08-15 14:08:03 -04002131 if (!capable(CAP_SYS_ADMIN))
2132 return -EPERM;
2133
Dave Chinner2e973b22021-08-18 18:46:52 -07002134 if (xfs_is_readonly(mp))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002135 return -EROFS;
Dwight Engen8c567a72013-08-15 14:08:03 -04002136
Brian Foster8ca149d2012-11-07 12:21:12 -05002137 if (copy_from_user(&eofb, arg, sizeof(eofb)))
Eric Sandeenb474c7a2014-06-22 15:04:54 +10002138 return -EFAULT;
Brian Foster8ca149d2012-11-07 12:21:12 -05002139
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07002140 error = xfs_fs_eofblocks_from_user(&eofb, &icw);
Dwight Engenb9fe5052013-08-15 14:08:02 -04002141 if (error)
Dave Chinner24513372014-06-25 14:58:08 +10002142 return error;
Brian Foster8ca149d2012-11-07 12:21:12 -05002143
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07002144 trace_xfs_ioc_free_eofblocks(mp, &icw, _RET_IP_);
Darrick J. Wong38899f82021-01-22 16:48:38 -08002145
Brian Foster4b674b92020-04-12 13:11:10 -07002146 sb_start_write(mp->m_super);
Darrick J. Wongb26b2bf2021-06-07 09:34:51 -07002147 error = xfs_blockgc_free_space(mp, &icw);
Brian Foster4b674b92020-04-12 13:11:10 -07002148 sb_end_write(mp->m_super);
2149 return error;
Brian Foster8ca149d2012-11-07 12:21:12 -05002150 }
2151
Lachlan McIlroydf26cfe2008-04-18 11:44:03 +10002152 default:
2153 return -ENOTTY;
2154 }
2155}