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Commit | Line | Data |
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2cb7cef9 BS |
1 | Date: Thu, 09 Oct 2008 17:11:53 +1100 |
2 | From: Donald Douwsma <donaldd@sgi.com> | |
3 | Subject: DMAPI support for xfs | |
4 | Patch-mainline: ? | |
5 | References: bnc#450658 | |
6 | ||
7 | Acked-by: Jan Kara <jack@suse.cz> | |
8 | ||
9 | --- | |
10 | fs/xfs/Kconfig | 13 | |
11 | fs/xfs/Makefile | 5 | |
12 | fs/xfs/dmapi/Makefile | 28 | |
13 | fs/xfs/dmapi/xfs_dm.c | 3337 +++++++++++++++++++++++++++++++++++++++++++ | |
14 | fs/xfs/dmapi/xfs_dm.h | 23 | |
15 | fs/xfs/linux-2.6/xfs_file.c | 76 | |
16 | fs/xfs/linux-2.6/xfs_ksyms.c | 99 + | |
17 | fs/xfs/linux-2.6/xfs_linux.h | 4 | |
18 | fs/xfs/linux-2.6/xfs_super.c | 13 | |
19 | fs/xfs/xfs_dmops.c | 20 | |
20 | fs/xfs/xfs_mount.h | 1 | |
21 | 11 files changed, 3613 insertions(+), 6 deletions(-) | |
22 | ||
23 | Index: linux-2.6.27/fs/xfs/dmapi/Makefile | |
24 | =================================================================== | |
25 | --- /dev/null | |
26 | +++ linux-2.6.27/fs/xfs/dmapi/Makefile | |
27 | @@ -0,0 +1,28 @@ | |
28 | +# | |
29 | +# Copyright (c) 2006 Silicon Graphics, Inc. | |
30 | +# All Rights Reserved. | |
31 | +# | |
32 | +# This program is free software; you can redistribute it and/or | |
33 | +# modify it under the terms of the GNU General Public License as | |
34 | +# published by the Free Software Foundation. | |
35 | +# | |
36 | +# This program is distributed in the hope that it would be useful, | |
37 | +# but WITHOUT ANY WARRANTY; without even the implied warranty of | |
38 | +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
39 | +# GNU General Public License for more details. | |
40 | +# | |
41 | +# You should have received a copy of the GNU General Public License | |
42 | +# along with this program; if not, write the Free Software Foundation, | |
43 | +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
44 | +# | |
45 | + | |
46 | +EXTRA_CFLAGS += -I$(src)/.. -I$(src)/../linux-2.6 | |
47 | +EXTRA_CFLAGS += -I$(TOPDIR)/fs/dmapi | |
48 | + | |
49 | +ifeq ($(CONFIG_XFS_DEBUG),y) | |
50 | + EXTRA_CFLAGS += -g -DDEBUG | |
51 | +endif | |
52 | + | |
53 | +obj-$(CONFIG_XFS_DMAPI) += xfs_dmapi.o | |
54 | + | |
55 | +xfs_dmapi-y += xfs_dm.o | |
56 | Index: linux-2.6.27/fs/xfs/dmapi/xfs_dm.c | |
57 | =================================================================== | |
58 | --- /dev/null | |
59 | +++ linux-2.6.27/fs/xfs/dmapi/xfs_dm.c | |
60 | @@ -0,0 +1,3337 @@ | |
61 | +/* | |
62 | + * Copyright (c) 2000-2006 Silicon Graphics, Inc. | |
63 | + * All Rights Reserved. | |
64 | + * | |
65 | + * This program is free software; you can redistribute it and/or | |
66 | + * modify it under the terms of the GNU General Public License as | |
67 | + * published by the Free Software Foundation. | |
68 | + * | |
69 | + * This program is distributed in the hope that it would be useful, | |
70 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
71 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
72 | + * GNU General Public License for more details. | |
73 | + * | |
74 | + * You should have received a copy of the GNU General Public License | |
75 | + * along with this program; if not, write the Free Software Foundation, | |
76 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
77 | + */ | |
78 | +#include "xfs.h" | |
79 | +#include "xfs_fs.h" | |
80 | +#include "xfs_types.h" | |
81 | +#include "xfs_bit.h" | |
82 | +#include "xfs_log.h" | |
83 | +#include "xfs_inum.h" | |
84 | +#include "xfs_clnt.h" | |
85 | +#include "xfs_trans.h" | |
86 | +#include "xfs_sb.h" | |
87 | +#include "xfs_ag.h" | |
88 | +#include "xfs_dir2.h" | |
89 | +#include "xfs_alloc.h" | |
90 | +#include "xfs_dmapi.h" | |
91 | +#include "xfs_mount.h" | |
92 | +#include "xfs_da_btree.h" | |
93 | +#include "xfs_bmap_btree.h" | |
94 | +#include "xfs_alloc_btree.h" | |
95 | +#include "xfs_ialloc_btree.h" | |
96 | +#include "xfs_dir2_sf.h" | |
97 | +#include "xfs_attr_sf.h" | |
98 | +#include "xfs_dinode.h" | |
99 | +#include "xfs_inode.h" | |
100 | +#include "xfs_btree.h" | |
101 | +#include "xfs_ialloc.h" | |
102 | +#include "xfs_itable.h" | |
103 | +#include "xfs_bmap.h" | |
104 | +#include "xfs_rw.h" | |
105 | +#include "xfs_acl.h" | |
106 | +#include "xfs_attr.h" | |
107 | +#include "xfs_attr_leaf.h" | |
108 | +#include "xfs_inode_item.h" | |
109 | +#include "xfs_vfsops.h" | |
110 | +#include "xfs_vnodeops.h" | |
111 | +#include <dmapi.h> | |
112 | +#include <dmapi_kern.h> | |
113 | +#include "xfs_dm.h" | |
114 | + | |
115 | +#include <linux/mount.h> | |
116 | + | |
117 | +#define MAXNAMLEN MAXNAMELEN | |
118 | + | |
119 | +#define MIN_DIO_SIZE(mp) ((mp)->m_sb.sb_sectsize) | |
120 | +#define MAX_DIO_SIZE(mp) (INT_MAX & ~(MIN_DIO_SIZE(mp) - 1)) | |
121 | + | |
122 | +static void up_rw_sems(struct inode *ip, int flags) | |
123 | +{ | |
124 | + if (flags & DM_FLAGS_IALLOCSEM_WR) | |
125 | + up_write(&ip->i_alloc_sem); | |
126 | + if (flags & DM_FLAGS_IMUX) | |
127 | + mutex_unlock(&ip->i_mutex); | |
128 | +} | |
129 | + | |
130 | +static void down_rw_sems(struct inode *ip, int flags) | |
131 | +{ | |
132 | + if (flags & DM_FLAGS_IMUX) | |
133 | + mutex_lock(&ip->i_mutex); | |
134 | + if (flags & DM_FLAGS_IALLOCSEM_WR) | |
135 | + down_write(&ip->i_alloc_sem); | |
136 | +} | |
137 | + | |
138 | + | |
139 | +/* Structure used to hold the on-disk version of a dm_attrname_t. All | |
140 | + on-disk attribute names start with the 8-byte string "SGI_DMI_". | |
141 | +*/ | |
142 | + | |
143 | +typedef struct { | |
144 | + char dan_chars[DMATTR_PREFIXLEN + DM_ATTR_NAME_SIZE + 1]; | |
145 | +} dm_dkattrname_t; | |
146 | + | |
147 | +/* Structure used by xfs_dm_get_bulkall(), used as the "private_data" | |
148 | + * that we want xfs_bulkstat to send to our formatter. | |
149 | + */ | |
150 | +typedef struct { | |
151 | + dm_fsid_t fsid; | |
152 | + void __user *laststruct; | |
153 | + dm_dkattrname_t attrname; | |
154 | +} dm_bulkstat_one_t; | |
155 | + | |
156 | +/* In the on-disk inode, DMAPI attribute names consist of the user-provided | |
157 | + name with the DMATTR_PREFIXSTRING pre-pended. This string must NEVER be | |
158 | + changed! | |
159 | +*/ | |
160 | + | |
161 | +static const char dmattr_prefix[DMATTR_PREFIXLEN + 1] = DMATTR_PREFIXSTRING; | |
162 | + | |
163 | +static dm_size_t dm_min_dio_xfer = 0; /* direct I/O disabled for now */ | |
164 | + | |
165 | + | |
166 | +/* See xfs_dm_get_dmattr() for a description of why this is needed. */ | |
167 | + | |
168 | +#define XFS_BUG_KLUDGE 256 /* max size of an in-inode attribute value */ | |
169 | + | |
170 | +#define DM_MAX_ATTR_BYTES_ON_DESTROY 256 | |
171 | + | |
172 | +#define DM_STAT_SIZE(dmtype,namelen) \ | |
173 | + (sizeof(dmtype) + sizeof(dm_handle_t) + namelen) | |
174 | + | |
175 | +#define DM_STAT_ALIGN (sizeof(__uint64_t)) | |
176 | + | |
177 | +/* DMAPI's E2BIG == EA's ERANGE */ | |
178 | +#define DM_EA_XLATE_ERR(err) { if (err == ERANGE) err = E2BIG; } | |
179 | + | |
180 | +static inline size_t dm_stat_align(size_t size) | |
181 | +{ | |
182 | + return (size + (DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
183 | +} | |
184 | + | |
185 | +static inline size_t dm_stat_size(size_t namelen) | |
186 | +{ | |
187 | + return dm_stat_align(sizeof(dm_stat_t) + sizeof(dm_handle_t) + namelen); | |
188 | +} | |
189 | + | |
190 | +/* | |
191 | + * xfs_dm_send_data_event() | |
192 | + * | |
193 | + * Send data event to DMAPI. Drop IO lock (if specified) before | |
194 | + * the dm_send_data_event() call and reacquire it afterwards. | |
195 | + */ | |
196 | +int | |
197 | +xfs_dm_send_data_event( | |
198 | + dm_eventtype_t event, | |
199 | + xfs_inode_t *ip, | |
200 | + xfs_off_t offset, | |
201 | + size_t length, | |
202 | + int flags, | |
203 | + int *lock_flags) | |
204 | +{ | |
205 | + struct inode *inode = ip->i_vnode; | |
206 | + int error; | |
207 | + uint16_t dmstate; | |
208 | + | |
209 | + /* Returns positive errors to XFS */ | |
210 | + | |
211 | + do { | |
212 | + dmstate = ip->i_d.di_dmstate; | |
213 | + if (lock_flags) | |
214 | + xfs_iunlock(ip, *lock_flags); | |
215 | + | |
216 | + up_rw_sems(inode, flags); | |
217 | + | |
218 | + error = dm_send_data_event(event, inode, DM_RIGHT_NULL, | |
219 | + offset, length, flags); | |
220 | + error = -error; /* DMAPI returns negative errors */ | |
221 | + | |
222 | + down_rw_sems(inode, flags); | |
223 | + | |
224 | + if (lock_flags) | |
225 | + xfs_ilock(ip, *lock_flags); | |
226 | + } while (!error && (ip->i_d.di_dmstate != dmstate)); | |
227 | + | |
228 | + return error; | |
229 | +} | |
230 | + | |
231 | +/* prohibited_mr_events | |
232 | + * | |
233 | + * Return event bits representing any events which cannot have managed | |
234 | + * region events set due to memory mapping of the file. If the maximum | |
235 | + * protection allowed in any pregion includes PROT_WRITE, and the region | |
236 | + * is shared and not text, then neither READ nor WRITE events can be set. | |
237 | + * Otherwise if the file is memory mapped, no READ event can be set. | |
238 | + * | |
239 | + */ | |
240 | +STATIC int | |
241 | +prohibited_mr_events( | |
242 | + struct address_space *mapping) | |
243 | +{ | |
244 | + int prohibited = (1 << DM_EVENT_READ); | |
245 | + | |
246 | + if (!mapping_mapped(mapping)) | |
247 | + return 0; | |
248 | + | |
249 | + spin_lock(&mapping->i_mmap_lock); | |
250 | + if (mapping_writably_mapped(mapping)) | |
251 | + prohibited |= (1 << DM_EVENT_WRITE); | |
252 | + spin_unlock(&mapping->i_mmap_lock); | |
253 | + | |
254 | + return prohibited; | |
255 | +} | |
256 | + | |
257 | +#ifdef DEBUG_RIGHTS | |
258 | +STATIC int | |
259 | +xfs_vp_to_hexhandle( | |
260 | + struct inode *inode, | |
261 | + u_int type, | |
262 | + char *buffer) | |
263 | +{ | |
264 | + dm_handle_t handle; | |
265 | + u_char *ip; | |
266 | + int length; | |
267 | + int error; | |
268 | + int i; | |
269 | + | |
270 | + /* | |
271 | + * XXX: dm_vp_to_handle doesn't exist. | |
272 | + * Looks like this debug code is rather dead. | |
273 | + */ | |
274 | + if ((error = dm_vp_to_handle(inode, &handle))) | |
275 | + return(error); | |
276 | + | |
277 | + if (type == DM_FSYS_OBJ) { /* a filesystem handle */ | |
278 | + length = DM_FSHSIZE; | |
279 | + } else { | |
280 | + length = DM_HSIZE(handle); | |
281 | + } | |
282 | + for (ip = (u_char *)&handle, i = 0; i < length; i++) { | |
283 | + *buffer++ = "0123456789abcdef"[ip[i] >> 4]; | |
284 | + *buffer++ = "0123456789abcdef"[ip[i] & 0xf]; | |
285 | + } | |
286 | + *buffer = '\0'; | |
287 | + return(0); | |
288 | +} | |
289 | +#endif /* DEBUG_RIGHTS */ | |
290 | + | |
291 | + | |
292 | + | |
293 | + | |
294 | +/* Copy in and validate an attribute name from user space. It should be a | |
295 | + string of at least one and at most DM_ATTR_NAME_SIZE characters. Because | |
296 | + the dm_attrname_t structure doesn't provide room for the trailing NULL | |
297 | + byte, we just copy in one extra character and then zero it if it | |
298 | + happens to be non-NULL. | |
299 | +*/ | |
300 | + | |
301 | +STATIC int | |
302 | +xfs_copyin_attrname( | |
303 | + dm_attrname_t __user *from, /* dm_attrname_t in user space */ | |
304 | + dm_dkattrname_t *to) /* name buffer in kernel space */ | |
305 | +{ | |
306 | + int error = 0; | |
307 | + size_t len; | |
308 | + | |
309 | + strcpy(to->dan_chars, dmattr_prefix); | |
310 | + | |
311 | + len = strnlen_user((char __user *)from, DM_ATTR_NAME_SIZE); | |
312 | + if (len == 0) | |
313 | + error = EFAULT; | |
314 | + else { | |
315 | + if (copy_from_user(&to->dan_chars[DMATTR_PREFIXLEN], from, len)) | |
316 | + to->dan_chars[sizeof(to->dan_chars) - 1] = '\0'; | |
317 | + else if (to->dan_chars[DMATTR_PREFIXLEN] == '\0') | |
318 | + error = EINVAL; | |
319 | + else | |
320 | + to->dan_chars[DMATTR_PREFIXLEN + len - 1] = '\0'; | |
321 | + } | |
322 | + | |
323 | + return error; | |
324 | +} | |
325 | + | |
326 | + | |
327 | +/* | |
328 | + * Convert the XFS flags into their DMAPI flag equivalent for export | |
329 | + */ | |
330 | +STATIC uint | |
331 | +_xfs_dic2dmflags( | |
332 | + __uint16_t di_flags) | |
333 | +{ | |
334 | + uint flags = 0; | |
335 | + | |
336 | + if (di_flags & XFS_DIFLAG_ANY) { | |
337 | + if (di_flags & XFS_DIFLAG_REALTIME) | |
338 | + flags |= DM_XFLAG_REALTIME; | |
339 | + if (di_flags & XFS_DIFLAG_PREALLOC) | |
340 | + flags |= DM_XFLAG_PREALLOC; | |
341 | + if (di_flags & XFS_DIFLAG_IMMUTABLE) | |
342 | + flags |= DM_XFLAG_IMMUTABLE; | |
343 | + if (di_flags & XFS_DIFLAG_APPEND) | |
344 | + flags |= DM_XFLAG_APPEND; | |
345 | + if (di_flags & XFS_DIFLAG_SYNC) | |
346 | + flags |= DM_XFLAG_SYNC; | |
347 | + if (di_flags & XFS_DIFLAG_NOATIME) | |
348 | + flags |= DM_XFLAG_NOATIME; | |
349 | + if (di_flags & XFS_DIFLAG_NODUMP) | |
350 | + flags |= DM_XFLAG_NODUMP; | |
351 | + } | |
352 | + return flags; | |
353 | +} | |
354 | + | |
355 | +STATIC uint | |
356 | +xfs_ip2dmflags( | |
357 | + xfs_inode_t *ip) | |
358 | +{ | |
359 | + return _xfs_dic2dmflags(ip->i_d.di_flags) | | |
360 | + (XFS_IFORK_Q(ip) ? DM_XFLAG_HASATTR : 0); | |
361 | +} | |
362 | + | |
363 | +STATIC uint | |
364 | +xfs_dic2dmflags( | |
365 | + xfs_dinode_t *dip) | |
366 | +{ | |
367 | + return _xfs_dic2dmflags(be16_to_cpu(dip->di_core.di_flags)) | | |
368 | + (XFS_DFORK_Q(dip) ? DM_XFLAG_HASATTR : 0); | |
369 | +} | |
370 | + | |
371 | +/* | |
372 | + * This copies selected fields in an inode into a dm_stat structure. Because | |
373 | + * these fields must return the same values as they would in stat(), the | |
374 | + * majority of this code was copied directly from xfs_getattr(). Any future | |
375 | + * changes to xfs_gettattr() must also be reflected here. | |
376 | + */ | |
377 | +STATIC void | |
378 | +xfs_dip_to_stat( | |
379 | + xfs_mount_t *mp, | |
380 | + xfs_ino_t ino, | |
381 | + xfs_dinode_t *dip, | |
382 | + dm_stat_t *buf) | |
383 | +{ | |
384 | + xfs_dinode_core_t *dic = &dip->di_core; | |
385 | + | |
386 | + /* | |
387 | + * The inode format changed when we moved the link count and | |
388 | + * made it 32 bits long. If this is an old format inode, | |
389 | + * convert it in memory to look like a new one. If it gets | |
390 | + * flushed to disk we will convert back before flushing or | |
391 | + * logging it. We zero out the new projid field and the old link | |
392 | + * count field. We'll handle clearing the pad field (the remains | |
393 | + * of the old uuid field) when we actually convert the inode to | |
394 | + * the new format. We don't change the version number so that we | |
395 | + * can distinguish this from a real new format inode. | |
396 | + */ | |
397 | + if (dic->di_version == XFS_DINODE_VERSION_1) { | |
398 | + buf->dt_nlink = be16_to_cpu(dic->di_onlink); | |
399 | + /*buf->dt_xfs_projid = 0;*/ | |
400 | + } else { | |
401 | + buf->dt_nlink = be32_to_cpu(dic->di_nlink); | |
402 | + /*buf->dt_xfs_projid = be16_to_cpu(dic->di_projid);*/ | |
403 | + } | |
404 | + buf->dt_ino = ino; | |
405 | + buf->dt_dev = new_encode_dev(mp->m_ddev_targp->bt_dev); | |
406 | + buf->dt_mode = be16_to_cpu(dic->di_mode); | |
407 | + buf->dt_uid = be32_to_cpu(dic->di_uid); | |
408 | + buf->dt_gid = be32_to_cpu(dic->di_gid); | |
409 | + buf->dt_size = be64_to_cpu(dic->di_size); | |
410 | + buf->dt_atime = be32_to_cpu(dic->di_atime.t_sec); | |
411 | + buf->dt_mtime = be32_to_cpu(dic->di_mtime.t_sec); | |
412 | + buf->dt_ctime = be32_to_cpu(dic->di_ctime.t_sec); | |
413 | + buf->dt_xfs_xflags = xfs_dic2dmflags(dip); | |
414 | + buf->dt_xfs_extsize = | |
415 | + be32_to_cpu(dic->di_extsize) << mp->m_sb.sb_blocklog; | |
416 | + buf->dt_xfs_extents = be32_to_cpu(dic->di_nextents); | |
417 | + buf->dt_xfs_aextents = be16_to_cpu(dic->di_anextents); | |
418 | + buf->dt_xfs_igen = be32_to_cpu(dic->di_gen); | |
419 | + buf->dt_xfs_dmstate = be16_to_cpu(dic->di_dmstate); | |
420 | + | |
421 | + switch (dic->di_format) { | |
422 | + case XFS_DINODE_FMT_DEV: | |
423 | + buf->dt_rdev = be32_to_cpu(dip->di_u.di_dev); | |
424 | + buf->dt_blksize = BLKDEV_IOSIZE; | |
425 | + buf->dt_blocks = 0; | |
426 | + break; | |
427 | + case XFS_DINODE_FMT_LOCAL: | |
428 | + case XFS_DINODE_FMT_UUID: | |
429 | + buf->dt_rdev = 0; | |
430 | + buf->dt_blksize = mp->m_sb.sb_blocksize; | |
431 | + buf->dt_blocks = 0; | |
432 | + break; | |
433 | + case XFS_DINODE_FMT_EXTENTS: | |
434 | + case XFS_DINODE_FMT_BTREE: | |
435 | + buf->dt_rdev = 0; | |
436 | + buf->dt_blksize = mp->m_sb.sb_blocksize; | |
437 | + buf->dt_blocks = | |
438 | + XFS_FSB_TO_BB(mp, be64_to_cpu(dic->di_nblocks)); | |
439 | + break; | |
440 | + } | |
441 | + | |
442 | + memset(&buf->dt_pad1, 0, sizeof(buf->dt_pad1)); | |
443 | + memset(&buf->dt_pad2, 0, sizeof(buf->dt_pad2)); | |
444 | + memset(&buf->dt_pad3, 0, sizeof(buf->dt_pad3)); | |
445 | + | |
446 | + /* Finally fill in the DMAPI specific fields */ | |
447 | + buf->dt_pers = 0; | |
448 | + buf->dt_change = 0; | |
449 | + buf->dt_nevents = DM_EVENT_MAX; | |
450 | + buf->dt_emask = be32_to_cpu(dic->di_dmevmask); | |
451 | + buf->dt_dtime = be32_to_cpu(dic->di_ctime.t_sec); | |
452 | + /* Set if one of READ, WRITE or TRUNCATE bits is set in emask */ | |
453 | + buf->dt_pmanreg = (DMEV_ISSET(DM_EVENT_READ, buf->dt_emask) || | |
454 | + DMEV_ISSET(DM_EVENT_WRITE, buf->dt_emask) || | |
455 | + DMEV_ISSET(DM_EVENT_TRUNCATE, buf->dt_emask)) ? 1 : 0; | |
456 | +} | |
457 | + | |
458 | +/* | |
459 | + * Pull out both ondisk and incore fields, incore has preference. | |
460 | + * The inode must be kept locked SHARED by the caller. | |
461 | + */ | |
462 | +STATIC void | |
463 | +xfs_ip_to_stat( | |
464 | + xfs_mount_t *mp, | |
465 | + xfs_ino_t ino, | |
466 | + xfs_inode_t *ip, | |
467 | + dm_stat_t *buf) | |
468 | +{ | |
469 | + xfs_icdinode_t *dic = &ip->i_d; | |
470 | + | |
471 | + buf->dt_ino = ino; | |
472 | + buf->dt_nlink = dic->di_nlink; | |
473 | + /*buf->dt_xfs_projid = dic->di_projid;*/ | |
474 | + buf->dt_mode = dic->di_mode; | |
475 | + buf->dt_uid = dic->di_uid; | |
476 | + buf->dt_gid = dic->di_gid; | |
477 | + buf->dt_size = XFS_ISIZE(ip); | |
478 | + buf->dt_dev = new_encode_dev(mp->m_ddev_targp->bt_dev); | |
479 | + vn_atime_to_time_t(VFS_I(ip), &buf->dt_atime); | |
480 | + buf->dt_mtime = dic->di_mtime.t_sec; | |
481 | + buf->dt_ctime = dic->di_ctime.t_sec; | |
482 | + buf->dt_xfs_xflags = xfs_ip2dmflags(ip); | |
483 | + buf->dt_xfs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog; | |
484 | + buf->dt_xfs_extents = dic->di_nextents; | |
485 | + buf->dt_xfs_aextents = dic->di_anextents; | |
486 | + buf->dt_xfs_igen = dic->di_gen; | |
487 | + buf->dt_xfs_dmstate = dic->di_dmstate; | |
488 | + | |
489 | + switch (dic->di_format) { | |
490 | + case XFS_DINODE_FMT_DEV: | |
491 | + buf->dt_rdev = ip->i_df.if_u2.if_rdev; | |
492 | + buf->dt_blksize = BLKDEV_IOSIZE; | |
493 | + buf->dt_blocks = 0; | |
494 | + break; | |
495 | + case XFS_DINODE_FMT_LOCAL: | |
496 | + case XFS_DINODE_FMT_UUID: | |
497 | + buf->dt_rdev = 0; | |
498 | + buf->dt_blksize = mp->m_sb.sb_blocksize; | |
499 | + buf->dt_blocks = 0; | |
500 | + break; | |
501 | + case XFS_DINODE_FMT_EXTENTS: | |
502 | + case XFS_DINODE_FMT_BTREE: | |
503 | + buf->dt_rdev = 0; | |
504 | + buf->dt_blksize = mp->m_sb.sb_blocksize; | |
505 | + buf->dt_blocks = XFS_FSB_TO_BB(mp, | |
506 | + (dic->di_nblocks + ip->i_delayed_blks)); | |
507 | + break; | |
508 | + } | |
509 | + | |
510 | + memset(&buf->dt_pad1, 0, sizeof(buf->dt_pad1)); | |
511 | + memset(&buf->dt_pad2, 0, sizeof(buf->dt_pad2)); | |
512 | + memset(&buf->dt_pad3, 0, sizeof(buf->dt_pad3)); | |
513 | + | |
514 | + /* Finally fill in the DMAPI specific fields */ | |
515 | + buf->dt_pers = 0; | |
516 | + buf->dt_change = 0; | |
517 | + buf->dt_nevents = DM_EVENT_MAX; | |
518 | + buf->dt_emask = dic->di_dmevmask; | |
519 | + buf->dt_dtime = dic->di_ctime.t_sec; | |
520 | + /* Set if one of READ, WRITE or TRUNCATE bits is set in emask */ | |
521 | + buf->dt_pmanreg = (DMEV_ISSET(DM_EVENT_READ, buf->dt_emask) || | |
522 | + DMEV_ISSET(DM_EVENT_WRITE, buf->dt_emask) || | |
523 | + DMEV_ISSET(DM_EVENT_TRUNCATE, buf->dt_emask)) ? 1 : 0; | |
524 | +} | |
525 | + | |
526 | +/* | |
527 | + * Take the handle and put it at the end of a dm_xstat buffer. | |
528 | + * dt_compname is unused in bulkstat - so we zero it out. | |
529 | + * Finally, update link in dm_xstat_t to point to next struct. | |
530 | + */ | |
531 | +STATIC void | |
532 | +xfs_dm_handle_to_xstat( | |
533 | + dm_xstat_t *xbuf, | |
534 | + size_t xstat_sz, | |
535 | + dm_handle_t *handle, | |
536 | + size_t handle_sz) | |
537 | +{ | |
538 | + dm_stat_t *sbuf = &xbuf->dx_statinfo; | |
539 | + | |
540 | + memcpy(xbuf + 1, handle, handle_sz); | |
541 | + sbuf->dt_handle.vd_offset = (ssize_t) sizeof(dm_xstat_t); | |
542 | + sbuf->dt_handle.vd_length = (size_t) DM_HSIZE(*handle); | |
543 | + memset(&sbuf->dt_compname, 0, sizeof(dm_vardata_t)); | |
544 | + sbuf->_link = xstat_sz; | |
545 | +} | |
546 | + | |
547 | +STATIC int | |
548 | +xfs_dm_bulkall_iget_one( | |
549 | + xfs_mount_t *mp, | |
550 | + xfs_ino_t ino, | |
551 | + xfs_daddr_t bno, | |
552 | + int *value_lenp, | |
553 | + dm_xstat_t *xbuf, | |
554 | + u_int *xstat_szp, | |
555 | + char *attr_name, | |
556 | + caddr_t attr_buf) | |
557 | +{ | |
558 | + xfs_inode_t *ip; | |
559 | + dm_handle_t handle; | |
560 | + u_int xstat_sz = *xstat_szp; | |
561 | + int value_len = *value_lenp; | |
562 | + int error; | |
563 | + | |
564 | + error = xfs_iget(mp, NULL, ino, | |
565 | + XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno); | |
566 | + if (error) | |
567 | + return error; | |
568 | + | |
569 | + xfs_ip_to_stat(mp, ino, ip, &xbuf->dx_statinfo); | |
570 | + dm_ip_to_handle(ip->i_vnode, &handle); | |
571 | + xfs_dm_handle_to_xstat(xbuf, xstat_sz, &handle, sizeof(handle)); | |
572 | + | |
573 | + /* Drop ILOCK_SHARED for call to xfs_attr_get */ | |
574 | + xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
575 | + | |
576 | + memset(&xbuf->dx_attrdata, 0, sizeof(dm_vardata_t)); | |
577 | + error = xfs_attr_get(ip, attr_name, attr_buf, &value_len, ATTR_ROOT); | |
578 | + iput(ip->i_vnode); | |
579 | + | |
580 | + DM_EA_XLATE_ERR(error); | |
581 | + if (error && (error != ENOATTR)) { | |
582 | + if (error == E2BIG) | |
583 | + error = ENOMEM; | |
584 | + return error; | |
585 | + } | |
586 | + | |
587 | + /* How much space was in the attr? */ | |
588 | + if (error != ENOATTR) { | |
589 | + xbuf->dx_attrdata.vd_offset = xstat_sz; | |
590 | + xbuf->dx_attrdata.vd_length = value_len; | |
591 | + xstat_sz += (value_len+(DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
592 | + } | |
593 | + *xstat_szp = xbuf->dx_statinfo._link = xstat_sz; | |
594 | + *value_lenp = value_len; | |
595 | + return 0; | |
596 | +} | |
597 | + | |
598 | + | |
599 | +STATIC int | |
600 | +xfs_dm_inline_attr( | |
601 | + xfs_mount_t *mp, | |
602 | + xfs_dinode_t *dip, | |
603 | + char *attr_name, | |
604 | + caddr_t attr_buf, | |
605 | + int *value_lenp) | |
606 | +{ | |
607 | + if (dip->di_core.di_aformat == XFS_DINODE_FMT_LOCAL) { | |
608 | + xfs_attr_shortform_t *sf; | |
609 | + xfs_attr_sf_entry_t *sfe; | |
610 | + unsigned int namelen = strlen(attr_name); | |
611 | + unsigned int valuelen = *value_lenp; | |
612 | + int i; | |
613 | + | |
614 | + sf = (xfs_attr_shortform_t *)XFS_DFORK_APTR(dip); | |
615 | + sfe = &sf->list[0]; | |
616 | + for (i = 0; i < sf->hdr.count; | |
617 | + sfe = XFS_ATTR_SF_NEXTENTRY(sfe), i++) { | |
618 | + if (sfe->namelen != namelen) | |
619 | + continue; | |
620 | + if (!(sfe->flags & XFS_ATTR_ROOT)) | |
621 | + continue; | |
622 | + if (memcmp(attr_name, sfe->nameval, namelen) != 0) | |
623 | + continue; | |
624 | + if (valuelen < sfe->valuelen) | |
625 | + return ERANGE; | |
626 | + valuelen = sfe->valuelen; | |
627 | + memcpy(attr_buf, &sfe->nameval[namelen], valuelen); | |
628 | + *value_lenp = valuelen; | |
629 | + return 0; | |
630 | + } | |
631 | + } | |
632 | + *value_lenp = 0; | |
633 | + return ENOATTR; | |
634 | +} | |
635 | + | |
636 | +STATIC void | |
637 | +dm_dip_to_handle( | |
638 | + xfs_ino_t ino, | |
639 | + xfs_dinode_t *dip, | |
640 | + dm_fsid_t *fsid, | |
641 | + dm_handle_t *handlep) | |
642 | +{ | |
643 | + dm_fid_t fid; | |
644 | + int hsize; | |
645 | + | |
646 | + fid.dm_fid_len = sizeof(struct dm_fid) - sizeof(fid.dm_fid_len); | |
647 | + fid.dm_fid_pad = 0; | |
648 | + fid.dm_fid_ino = ino; | |
649 | + fid.dm_fid_gen = be32_to_cpu(dip->di_core.di_gen); | |
650 | + | |
651 | + memcpy(&handlep->ha_fsid, fsid, sizeof(*fsid)); | |
652 | + memcpy(&handlep->ha_fid, &fid, fid.dm_fid_len + sizeof(fid.dm_fid_len)); | |
653 | + hsize = DM_HSIZE(*handlep); | |
654 | + memset((char *)handlep + hsize, 0, sizeof(*handlep) - hsize); | |
655 | +} | |
656 | + | |
657 | +STATIC int | |
658 | +xfs_dm_bulkall_inline_one( | |
659 | + xfs_mount_t *mp, | |
660 | + xfs_ino_t ino, | |
661 | + xfs_dinode_t *dip, | |
662 | + dm_fsid_t *fsid, | |
663 | + int *value_lenp, | |
664 | + dm_xstat_t *xbuf, | |
665 | + u_int *xstat_szp, | |
666 | + char *attr_name, | |
667 | + caddr_t attr_buf) | |
668 | +{ | |
669 | + dm_handle_t handle; | |
670 | + u_int xstat_sz = *xstat_szp; | |
671 | + int value_len = *value_lenp; | |
672 | + int error; | |
673 | + | |
674 | + if (dip->di_core.di_mode == 0) | |
675 | + return ENOENT; | |
676 | + | |
677 | + xfs_dip_to_stat(mp, ino, dip, &xbuf->dx_statinfo); | |
678 | + dm_dip_to_handle(ino, dip, fsid, &handle); | |
679 | + xfs_dm_handle_to_xstat(xbuf, xstat_sz, &handle, sizeof(handle)); | |
680 | + | |
681 | + memset(&xbuf->dx_attrdata, 0, sizeof(dm_vardata_t)); | |
682 | + error = xfs_dm_inline_attr(mp, dip, attr_name, attr_buf, &value_len); | |
683 | + DM_EA_XLATE_ERR(error); | |
684 | + if (error && (error != ENOATTR)) { | |
685 | + if (error == E2BIG) | |
686 | + error = ENOMEM; | |
687 | + return error; | |
688 | + } | |
689 | + | |
690 | + /* How much space was in the attr? */ | |
691 | + if (error != ENOATTR) { | |
692 | + xbuf->dx_attrdata.vd_offset = xstat_sz; | |
693 | + xbuf->dx_attrdata.vd_length = value_len; | |
694 | + xstat_sz += (value_len+(DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
695 | + } | |
696 | + *xstat_szp = xbuf->dx_statinfo._link = xstat_sz; | |
697 | + *value_lenp = value_len; | |
698 | + return 0; | |
699 | +} | |
700 | + | |
701 | +/* | |
702 | + * This is used by dm_get_bulkall(). | |
703 | + * Given a inumber, it igets the inode and fills the given buffer | |
704 | + * with the dm_xstat structure for the file. | |
705 | + */ | |
706 | +STATIC int | |
707 | +xfs_dm_bulkall_one( | |
708 | + xfs_mount_t *mp, /* mount point for filesystem */ | |
709 | + xfs_ino_t ino, /* inode number to get data for */ | |
710 | + void __user *buffer, /* buffer to place output in */ | |
711 | + int ubsize, /* size of buffer */ | |
712 | + void *private_data, /* my private data */ | |
713 | + xfs_daddr_t bno, /* starting block of inode cluster */ | |
714 | + int *ubused, /* amount of buffer we used */ | |
715 | + void *dibuff, /* on-disk inode buffer */ | |
716 | + int *res) /* bulkstat result code */ | |
717 | +{ | |
718 | + dm_xstat_t *xbuf; | |
719 | + u_int xstat_sz; | |
720 | + int error; | |
721 | + int value_len; | |
722 | + int kern_buf_sz; | |
723 | + int attr_buf_sz; | |
724 | + caddr_t attr_buf; | |
725 | + void __user *attr_user_buf; | |
726 | + dm_bulkstat_one_t *dmb = (dm_bulkstat_one_t*)private_data; | |
727 | + | |
728 | + /* Returns positive errors to XFS */ | |
729 | + | |
730 | + *res = BULKSTAT_RV_NOTHING; | |
731 | + | |
732 | + if (!buffer || xfs_internal_inum(mp, ino)) | |
733 | + return EINVAL; | |
734 | + | |
735 | + xstat_sz = DM_STAT_SIZE(*xbuf, 0); | |
736 | + xstat_sz = (xstat_sz + (DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
737 | + if (xstat_sz > ubsize) | |
738 | + return ENOMEM; | |
739 | + | |
740 | + kern_buf_sz = xstat_sz; | |
741 | + xbuf = kmem_alloc(kern_buf_sz, KM_SLEEP); | |
742 | + | |
743 | + /* Determine place to drop attr value, and available space. */ | |
744 | + value_len = ubsize - xstat_sz; | |
745 | + if (value_len > ATTR_MAX_VALUELEN) | |
746 | + value_len = ATTR_MAX_VALUELEN; | |
747 | + | |
748 | + attr_user_buf = buffer + xstat_sz; | |
749 | + attr_buf_sz = value_len; | |
750 | + attr_buf = kmem_alloc(attr_buf_sz, KM_SLEEP); | |
751 | + | |
752 | + if (!dibuff) | |
753 | + error = xfs_dm_bulkall_iget_one(mp, ino, bno, | |
754 | + &value_len, xbuf, &xstat_sz, | |
755 | + dmb->attrname.dan_chars, | |
756 | + attr_buf); | |
757 | + else | |
758 | + error = xfs_dm_bulkall_inline_one(mp, ino, | |
759 | + (xfs_dinode_t *)dibuff, | |
760 | + &dmb->fsid, | |
761 | + &value_len, xbuf, &xstat_sz, | |
762 | + dmb->attrname.dan_chars, | |
763 | + attr_buf); | |
764 | + if (error) | |
765 | + goto out_free_buffers; | |
766 | + | |
767 | + if (copy_to_user(buffer, xbuf, kern_buf_sz)) { | |
768 | + error = EFAULT; | |
769 | + goto out_free_buffers; | |
770 | + } | |
771 | + if (copy_to_user(attr_user_buf, attr_buf, value_len)) { | |
772 | + error = EFAULT; | |
773 | + goto out_free_buffers; | |
774 | + } | |
775 | + | |
776 | + kmem_free(attr_buf); | |
777 | + kmem_free(xbuf); | |
778 | + | |
779 | + *res = BULKSTAT_RV_DIDONE; | |
780 | + if (ubused) | |
781 | + *ubused = xstat_sz; | |
782 | + dmb->laststruct = buffer; | |
783 | + return 0; | |
784 | + | |
785 | + out_free_buffers: | |
786 | + kmem_free(attr_buf); | |
787 | + kmem_free(xbuf); | |
788 | + return error; | |
789 | +} | |
790 | + | |
791 | +/* | |
792 | + * Take the handle and put it at the end of a dm_stat buffer. | |
793 | + * dt_compname is unused in bulkstat - so we zero it out. | |
794 | + * Finally, update link in dm_stat_t to point to next struct. | |
795 | + */ | |
796 | +STATIC void | |
797 | +xfs_dm_handle_to_stat( | |
798 | + dm_stat_t *sbuf, | |
799 | + size_t stat_sz, | |
800 | + dm_handle_t *handle, | |
801 | + size_t handle_sz) | |
802 | +{ | |
803 | + memcpy(sbuf + 1, handle, handle_sz); | |
804 | + sbuf->dt_handle.vd_offset = (ssize_t) sizeof(dm_stat_t); | |
805 | + sbuf->dt_handle.vd_length = (size_t) DM_HSIZE(*handle); | |
806 | + memset(&sbuf->dt_compname, 0, sizeof(dm_vardata_t)); | |
807 | + sbuf->_link = stat_sz; | |
808 | +} | |
809 | + | |
810 | +STATIC int | |
811 | +xfs_dm_bulkattr_iget_one( | |
812 | + xfs_mount_t *mp, | |
813 | + xfs_ino_t ino, | |
814 | + xfs_daddr_t bno, | |
815 | + dm_stat_t *sbuf, | |
816 | + u_int stat_sz) | |
817 | +{ | |
818 | + xfs_inode_t *ip; | |
819 | + dm_handle_t handle; | |
820 | + int error; | |
821 | + | |
822 | + error = xfs_iget(mp, NULL, ino, | |
823 | + XFS_IGET_BULKSTAT, XFS_ILOCK_SHARED, &ip, bno); | |
824 | + if (error) | |
825 | + return error; | |
826 | + | |
827 | + xfs_ip_to_stat(mp, ino, ip, sbuf); | |
828 | + dm_ip_to_handle(ip->i_vnode, &handle); | |
829 | + xfs_dm_handle_to_stat(sbuf, stat_sz, &handle, sizeof(handle)); | |
830 | + | |
831 | + xfs_iput(ip, XFS_ILOCK_SHARED); | |
832 | + return 0; | |
833 | +} | |
834 | + | |
835 | +STATIC int | |
836 | +xfs_dm_bulkattr_inline_one( | |
837 | + xfs_mount_t *mp, | |
838 | + xfs_ino_t ino, | |
839 | + xfs_dinode_t *dip, | |
840 | + dm_fsid_t *fsid, | |
841 | + dm_stat_t *sbuf, | |
842 | + u_int stat_sz) | |
843 | +{ | |
844 | + dm_handle_t handle; | |
845 | + | |
846 | + if (dip->di_core.di_mode == 0) | |
847 | + return ENOENT; | |
848 | + xfs_dip_to_stat(mp, ino, dip, sbuf); | |
849 | + dm_dip_to_handle(ino, dip, fsid, &handle); | |
850 | + xfs_dm_handle_to_stat(sbuf, stat_sz, &handle, sizeof(handle)); | |
851 | + return 0; | |
852 | +} | |
853 | + | |
854 | +/* | |
855 | + * This is used by dm_get_bulkattr(). | |
856 | + * Given a inumber, it igets the inode and fills the given buffer | |
857 | + * with the dm_stat structure for the file. | |
858 | + */ | |
859 | +STATIC int | |
860 | +xfs_dm_bulkattr_one( | |
861 | + xfs_mount_t *mp, /* mount point for filesystem */ | |
862 | + xfs_ino_t ino, /* inode number to get data for */ | |
863 | + void __user *buffer, /* buffer to place output in */ | |
864 | + int ubsize, /* size of buffer */ | |
865 | + void *private_data, /* my private data */ | |
866 | + xfs_daddr_t bno, /* starting block of inode cluster */ | |
867 | + int *ubused, /* amount of buffer we used */ | |
868 | + void *dibuff, /* on-disk inode buffer */ | |
869 | + int *res) /* bulkstat result code */ | |
870 | +{ | |
871 | + dm_stat_t *sbuf; | |
872 | + u_int stat_sz; | |
873 | + int error; | |
874 | + dm_bulkstat_one_t *dmb = (dm_bulkstat_one_t*)private_data; | |
875 | + | |
876 | + /* Returns positive errors to XFS */ | |
877 | + | |
878 | + *res = BULKSTAT_RV_NOTHING; | |
879 | + | |
880 | + if (!buffer || xfs_internal_inum(mp, ino)) | |
881 | + return EINVAL; | |
882 | + | |
883 | + stat_sz = DM_STAT_SIZE(*sbuf, 0); | |
884 | + stat_sz = (stat_sz+(DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
885 | + if (stat_sz > ubsize) | |
886 | + return ENOMEM; | |
887 | + | |
888 | + sbuf = kmem_alloc(stat_sz, KM_SLEEP); | |
889 | + | |
890 | + if (!dibuff) | |
891 | + error = xfs_dm_bulkattr_iget_one(mp, ino, bno, sbuf, stat_sz); | |
892 | + else | |
893 | + error = xfs_dm_bulkattr_inline_one(mp, ino, | |
894 | + (xfs_dinode_t *)dibuff, | |
895 | + &dmb->fsid, sbuf, stat_sz); | |
896 | + if (error) | |
897 | + goto out_free_buffer; | |
898 | + | |
899 | + if (copy_to_user(buffer, sbuf, stat_sz)) { | |
900 | + error = EFAULT; | |
901 | + goto out_free_buffer; | |
902 | + } | |
903 | + | |
904 | + kmem_free(sbuf); | |
905 | + *res = BULKSTAT_RV_DIDONE; | |
906 | + if (ubused) | |
907 | + *ubused = stat_sz; | |
908 | + dmb->laststruct = buffer; | |
909 | + return 0; | |
910 | + | |
911 | + out_free_buffer: | |
912 | + kmem_free(sbuf); | |
913 | + return error; | |
914 | +} | |
915 | + | |
916 | +/* xfs_dm_f_get_eventlist - return the dm_eventset_t mask for inode ip. */ | |
917 | + | |
918 | +STATIC int | |
919 | +xfs_dm_f_get_eventlist( | |
920 | + xfs_inode_t *ip, | |
921 | + dm_right_t right, | |
922 | + u_int nelem, | |
923 | + dm_eventset_t *eventsetp, /* in kernel space! */ | |
924 | + u_int *nelemp) /* in kernel space! */ | |
925 | +{ | |
926 | + dm_eventset_t eventset; | |
927 | + | |
928 | + if (right < DM_RIGHT_SHARED) | |
929 | + return(EACCES); | |
930 | + | |
931 | + /* Note that we MUST return a regular file's managed region bits as | |
932 | + part of the mask because dm_get_eventlist is supposed to return the | |
933 | + union of all managed region flags in those bits. Since we only | |
934 | + support one region, we can just return the bits as they are. For | |
935 | + all other object types, the bits will already be zero. Handy, huh? | |
936 | + */ | |
937 | + | |
938 | + eventset = ip->i_d.di_dmevmask; | |
939 | + | |
940 | + /* Now copy the event mask and event count back to the caller. We | |
941 | + return the lesser of nelem and DM_EVENT_MAX. | |
942 | + */ | |
943 | + | |
944 | + if (nelem > DM_EVENT_MAX) | |
945 | + nelem = DM_EVENT_MAX; | |
946 | + eventset &= (1 << nelem) - 1; | |
947 | + | |
948 | + *eventsetp = eventset; | |
949 | + *nelemp = nelem; | |
950 | + return(0); | |
951 | +} | |
952 | + | |
953 | + | |
954 | +/* xfs_dm_f_set_eventlist - update the dm_eventset_t mask in the inode vp. Only the | |
955 | + bits from zero to maxevent-1 are being replaced; higher bits are preserved. | |
956 | +*/ | |
957 | + | |
958 | +STATIC int | |
959 | +xfs_dm_f_set_eventlist( | |
960 | + xfs_inode_t *ip, | |
961 | + dm_right_t right, | |
962 | + dm_eventset_t *eventsetp, /* in kernel space! */ | |
963 | + u_int maxevent) | |
964 | +{ | |
965 | + dm_eventset_t eventset; | |
966 | + dm_eventset_t max_mask; | |
967 | + dm_eventset_t valid_events; | |
968 | + xfs_trans_t *tp; | |
969 | + xfs_mount_t *mp; | |
970 | + int error; | |
971 | + | |
972 | + if (right < DM_RIGHT_EXCL) | |
973 | + return(EACCES); | |
974 | + | |
975 | + eventset = *eventsetp; | |
976 | + if (maxevent >= sizeof(ip->i_d.di_dmevmask) * NBBY) | |
977 | + return(EINVAL); | |
978 | + max_mask = (1 << maxevent) - 1; | |
979 | + | |
980 | + if (S_ISDIR(ip->i_d.di_mode)) { | |
981 | + valid_events = DM_XFS_VALID_DIRECTORY_EVENTS; | |
982 | + } else { /* file or symlink */ | |
983 | + valid_events = DM_XFS_VALID_FILE_EVENTS; | |
984 | + } | |
985 | + if ((eventset & max_mask) & ~valid_events) | |
986 | + return(EINVAL); | |
987 | + | |
988 | + /* Adjust the event mask so that the managed region bits will not | |
989 | + be altered. | |
990 | + */ | |
991 | + | |
992 | + max_mask &= ~(1 <<DM_EVENT_READ); /* preserve current MR bits */ | |
993 | + max_mask &= ~(1 <<DM_EVENT_WRITE); | |
994 | + max_mask &= ~(1 <<DM_EVENT_TRUNCATE); | |
995 | + | |
996 | + mp = ip->i_mount; | |
997 | + tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
998 | + error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); | |
999 | + if (error) { | |
1000 | + xfs_trans_cancel(tp, 0); | |
1001 | + return(error); | |
1002 | + } | |
1003 | + xfs_ilock(ip, XFS_ILOCK_EXCL); | |
1004 | + xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
1005 | + | |
1006 | + ip->i_d.di_dmevmask = (eventset & max_mask) | (ip->i_d.di_dmevmask & ~max_mask); | |
1007 | + | |
1008 | + xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
1009 | + igrab(ip->i_vnode); | |
1010 | + xfs_trans_commit(tp, 0); | |
1011 | + | |
1012 | + return(0); | |
1013 | +} | |
1014 | + | |
1015 | + | |
1016 | +/* xfs_dm_fs_get_eventlist - return the dm_eventset_t mask for filesystem vfsp. */ | |
1017 | + | |
1018 | +STATIC int | |
1019 | +xfs_dm_fs_get_eventlist( | |
1020 | + xfs_mount_t *mp, | |
1021 | + dm_right_t right, | |
1022 | + u_int nelem, | |
1023 | + dm_eventset_t *eventsetp, /* in kernel space! */ | |
1024 | + u_int *nelemp) /* in kernel space! */ | |
1025 | +{ | |
1026 | + dm_eventset_t eventset; | |
1027 | + | |
1028 | + if (right < DM_RIGHT_SHARED) | |
1029 | + return(EACCES); | |
1030 | + | |
1031 | + eventset = mp->m_dmevmask; | |
1032 | + | |
1033 | + /* Now copy the event mask and event count back to the caller. We | |
1034 | + return the lesser of nelem and DM_EVENT_MAX. | |
1035 | + */ | |
1036 | + | |
1037 | + if (nelem > DM_EVENT_MAX) | |
1038 | + nelem = DM_EVENT_MAX; | |
1039 | + eventset &= (1 << nelem) - 1; | |
1040 | + | |
1041 | + *eventsetp = eventset; | |
1042 | + *nelemp = nelem; | |
1043 | + return(0); | |
1044 | +} | |
1045 | + | |
1046 | + | |
1047 | +/* xfs_dm_fs_set_eventlist - update the dm_eventset_t mask in the mount structure for | |
1048 | + filesystem vfsp. Only the bits from zero to maxevent-1 are being replaced; | |
1049 | + higher bits are preserved. | |
1050 | +*/ | |
1051 | + | |
1052 | +STATIC int | |
1053 | +xfs_dm_fs_set_eventlist( | |
1054 | + xfs_mount_t *mp, | |
1055 | + dm_right_t right, | |
1056 | + dm_eventset_t *eventsetp, /* in kernel space! */ | |
1057 | + u_int maxevent) | |
1058 | +{ | |
1059 | + dm_eventset_t eventset; | |
1060 | + dm_eventset_t max_mask; | |
1061 | + | |
1062 | + if (right < DM_RIGHT_EXCL) | |
1063 | + return(EACCES); | |
1064 | + | |
1065 | + eventset = *eventsetp; | |
1066 | + | |
1067 | + if (maxevent >= sizeof(mp->m_dmevmask) * NBBY) | |
1068 | + return(EINVAL); | |
1069 | + max_mask = (1 << maxevent) - 1; | |
1070 | + | |
1071 | + if ((eventset & max_mask) & ~DM_XFS_VALID_FS_EVENTS) | |
1072 | + return(EINVAL); | |
1073 | + | |
1074 | + mp->m_dmevmask = (eventset & max_mask) | (mp->m_dmevmask & ~max_mask); | |
1075 | + return(0); | |
1076 | +} | |
1077 | + | |
1078 | + | |
1079 | +/* Code in this routine must exactly match the logic in xfs_diordwr() in | |
1080 | + order for this to work! | |
1081 | +*/ | |
1082 | + | |
1083 | +STATIC int | |
1084 | +xfs_dm_direct_ok( | |
1085 | + xfs_inode_t *ip, | |
1086 | + dm_off_t off, | |
1087 | + dm_size_t len, | |
1088 | + void __user *bufp) | |
1089 | +{ | |
1090 | + xfs_mount_t *mp; | |
1091 | + | |
1092 | + mp = ip->i_mount; | |
1093 | + | |
1094 | + /* Realtime files can ONLY do direct I/O. */ | |
1095 | + | |
1096 | + if (XFS_IS_REALTIME_INODE(ip)) | |
1097 | + return(1); | |
1098 | + | |
1099 | + /* If direct I/O is disabled, or if the request is too small, use | |
1100 | + buffered I/O. | |
1101 | + */ | |
1102 | + | |
1103 | + if (!dm_min_dio_xfer || len < dm_min_dio_xfer) | |
1104 | + return(0); | |
1105 | + | |
1106 | +#if 0 | |
1107 | + /* If the request is not well-formed or is too large, use | |
1108 | + buffered I/O. | |
1109 | + */ | |
1110 | + | |
1111 | + if ((__psint_t)bufp & scache_linemask) /* if buffer not aligned */ | |
1112 | + return(0); | |
1113 | + if (off & mp->m_blockmask) /* if file offset not aligned */ | |
1114 | + return(0); | |
1115 | + if (len & mp->m_blockmask) /* if xfer length not aligned */ | |
1116 | + return(0); | |
1117 | + if (len > ctooff(v.v_maxdmasz - 1)) /* if transfer too large */ | |
1118 | + return(0); | |
1119 | + | |
1120 | + /* A valid direct I/O candidate. */ | |
1121 | + | |
1122 | + return(1); | |
1123 | +#else | |
1124 | + return(0); | |
1125 | +#endif | |
1126 | +} | |
1127 | + | |
1128 | + | |
1129 | +/* We need to be able to select various combinations of O_NONBLOCK, | |
1130 | + O_DIRECT, and O_SYNC, yet we don't have a file descriptor and we don't have | |
1131 | + the file's pathname. All we have is a handle. | |
1132 | +*/ | |
1133 | + | |
1134 | +STATIC int | |
1135 | +xfs_dm_rdwr( | |
1136 | + struct inode *inode, | |
1137 | + uint fflag, | |
1138 | + mode_t fmode, | |
1139 | + dm_off_t off, | |
1140 | + dm_size_t len, | |
1141 | + void __user *bufp, | |
1142 | + int *rvp) | |
1143 | +{ | |
1144 | + xfs_inode_t *ip = XFS_I(inode); | |
1145 | + int error; | |
1146 | + int oflags; | |
1147 | + ssize_t xfer; | |
1148 | + struct file *file; | |
1149 | + struct dentry *dentry; | |
1150 | + | |
1151 | + if ((off < 0) || (off > i_size_read(inode)) || !S_ISREG(inode->i_mode)) | |
1152 | + return EINVAL; | |
1153 | + | |
1154 | + if (fmode & FMODE_READ) { | |
1155 | + oflags = O_RDONLY; | |
1156 | + } else { | |
1157 | + oflags = O_WRONLY; | |
1158 | + } | |
1159 | + | |
1160 | + /* | |
1161 | + * Build file descriptor flags and I/O flags. O_NONBLOCK is needed so | |
1162 | + * that we don't block on mandatory file locks. This is an invisible IO, | |
1163 | + * don't change the atime. | |
1164 | + */ | |
1165 | + | |
1166 | + oflags |= O_LARGEFILE | O_NONBLOCK | O_NOATIME; | |
1167 | + if (xfs_dm_direct_ok(ip, off, len, bufp)) | |
1168 | + oflags |= O_DIRECT; | |
1169 | + | |
1170 | + if (fflag & O_SYNC) | |
1171 | + oflags |= O_SYNC; | |
1172 | + | |
1173 | + if (inode->i_fop == NULL) { | |
1174 | + /* no iput; caller did get, and will do put */ | |
1175 | + return EINVAL; | |
1176 | + } | |
1177 | + | |
1178 | + igrab(inode); | |
1179 | + | |
1180 | + dentry = d_alloc_anon(inode); | |
1181 | + if (dentry == NULL) { | |
1182 | + iput(inode); | |
1183 | + return ENOMEM; | |
1184 | + } | |
1185 | + | |
1186 | + file = dentry_open(dentry, mntget(ip->i_mount->m_vfsmount), oflags); | |
1187 | + if (IS_ERR(file)) { | |
1188 | + return -PTR_ERR(file); | |
1189 | + } | |
1190 | + file->f_op = &xfs_invis_file_operations; | |
1191 | + | |
1192 | + if (fmode & FMODE_READ) { | |
1193 | + xfer = file->f_op->read(file, bufp, len, (loff_t*)&off); | |
1194 | + } else { | |
1195 | + xfer = file->f_op->write(file, bufp, len, (loff_t*)&off); | |
1196 | + } | |
1197 | + | |
1198 | + if (xfer >= 0) { | |
1199 | + *rvp = xfer; | |
1200 | + error = 0; | |
1201 | + } else { | |
1202 | + /* xfs_read/xfs_write return negative error--flip it */ | |
1203 | + error = -(int)xfer; | |
1204 | + } | |
1205 | + | |
1206 | + fput(file); | |
1207 | + return error; | |
1208 | +} | |
1209 | + | |
1210 | +/* ARGSUSED */ | |
1211 | +STATIC int | |
1212 | +xfs_dm_clear_inherit( | |
1213 | + struct inode *inode, | |
1214 | + dm_right_t right, | |
1215 | + dm_attrname_t __user *attrnamep) | |
1216 | +{ | |
1217 | + return(-ENOSYS); /* Return negative error to DMAPI */ | |
1218 | +} | |
1219 | + | |
1220 | + | |
1221 | +/* ARGSUSED */ | |
1222 | +STATIC int | |
1223 | +xfs_dm_create_by_handle( | |
1224 | + struct inode *inode, | |
1225 | + dm_right_t right, | |
1226 | + void __user *hanp, | |
1227 | + size_t hlen, | |
1228 | + char __user *cname) | |
1229 | +{ | |
1230 | + return(-ENOSYS); /* Return negative error to DMAPI */ | |
1231 | +} | |
1232 | + | |
1233 | + | |
1234 | +/* ARGSUSED */ | |
1235 | +STATIC int | |
1236 | +xfs_dm_downgrade_right( | |
1237 | + struct inode *inode, | |
1238 | + dm_right_t right, | |
1239 | + u_int type) /* DM_FSYS_OBJ or zero */ | |
1240 | +{ | |
1241 | +#ifdef DEBUG_RIGHTS | |
1242 | + char buffer[sizeof(dm_handle_t) * 2 + 1]; | |
1243 | + | |
1244 | + if (!xfs_vp_to_hexhandle(inode, type, buffer)) { | |
1245 | + printf("dm_downgrade_right: old %d new %d type %d handle %s\n", | |
1246 | + right, DM_RIGHT_SHARED, type, buffer); | |
1247 | + } else { | |
1248 | + printf("dm_downgrade_right: old %d new %d type %d handle " | |
1249 | + "<INVALID>\n", right, DM_RIGHT_SHARED, type); | |
1250 | + } | |
1251 | +#endif /* DEBUG_RIGHTS */ | |
1252 | + return(0); | |
1253 | +} | |
1254 | + | |
1255 | + | |
1256 | +/* Note: xfs_dm_get_allocinfo() makes no attempt to coalesce two adjacent | |
1257 | + extents when both are of type DM_EXTENT_RES; this is left to the caller. | |
1258 | + XFS guarantees that there will never be two adjacent DM_EXTENT_HOLE extents. | |
1259 | + | |
1260 | + In order to provide the caller with all extents in a file including | |
1261 | + those beyond the file's last byte offset, we have to use the xfs_bmapi() | |
1262 | + interface. | |
1263 | +*/ | |
1264 | + | |
1265 | +STATIC int | |
1266 | +xfs_dm_get_allocinfo_rvp( | |
1267 | + struct inode *inode, | |
1268 | + dm_right_t right, | |
1269 | + dm_off_t __user *offp, | |
1270 | + u_int nelem, | |
1271 | + dm_extent_t __user *extentp, | |
1272 | + u_int __user *nelemp, | |
1273 | + int *rvp) | |
1274 | +{ | |
1275 | + xfs_inode_t *ip = XFS_I(inode); | |
1276 | + xfs_mount_t *mp; /* file system mount point */ | |
1277 | + xfs_fileoff_t fsb_offset; | |
1278 | + xfs_filblks_t fsb_length; | |
1279 | + dm_off_t startoff; | |
1280 | + int elem; | |
1281 | + xfs_bmbt_irec_t *bmp = NULL; | |
1282 | + u_int bmpcnt = 50; | |
1283 | + u_int bmpsz = sizeof(xfs_bmbt_irec_t) * bmpcnt; | |
1284 | + int error = 0; | |
1285 | + | |
1286 | + /* Returns negative errors to DMAPI */ | |
1287 | + | |
1288 | + if (right < DM_RIGHT_SHARED) | |
1289 | + return(-EACCES); | |
1290 | + | |
1291 | + if ((inode->i_mode & S_IFMT) != S_IFREG) | |
1292 | + return(-EINVAL); | |
1293 | + | |
1294 | + if (copy_from_user( &startoff, offp, sizeof(startoff))) | |
1295 | + return(-EFAULT); | |
1296 | + | |
1297 | + mp = ip->i_mount; | |
1298 | + ASSERT(mp); | |
1299 | + | |
1300 | + if (startoff > XFS_MAXIOFFSET(mp)) | |
1301 | + return(-EINVAL); | |
1302 | + | |
1303 | + if (nelem == 0) | |
1304 | + return(-EINVAL); | |
1305 | + | |
1306 | + /* Convert the caller's starting offset into filesystem allocation | |
1307 | + units as required by xfs_bmapi(). Round the offset down so that | |
1308 | + it is sure to be included in the reply. | |
1309 | + */ | |
1310 | + | |
1311 | + fsb_offset = XFS_B_TO_FSBT(mp, startoff); | |
1312 | + fsb_length = XFS_B_TO_FSB(mp, XFS_MAXIOFFSET(mp)) - fsb_offset; | |
1313 | + elem = 0; | |
1314 | + | |
1315 | + if (fsb_length) | |
1316 | + bmp = kmem_alloc(bmpsz, KM_SLEEP); | |
1317 | + | |
1318 | + while (fsb_length && elem < nelem) { | |
1319 | + dm_extent_t extent; | |
1320 | + xfs_filblks_t fsb_bias; | |
1321 | + dm_size_t bias; | |
1322 | + int lock; | |
1323 | + int num; | |
1324 | + int i; | |
1325 | + | |
1326 | + /* Compute how many getbmap structures to use on the xfs_bmapi | |
1327 | + call. | |
1328 | + */ | |
1329 | + | |
1330 | + num = MIN((u_int)(nelem - elem), bmpcnt); | |
1331 | + | |
1332 | + xfs_ilock(ip, XFS_IOLOCK_SHARED); | |
1333 | + lock = xfs_ilock_map_shared(ip); | |
1334 | + | |
1335 | + error = xfs_bmapi(NULL, ip, fsb_offset, fsb_length, | |
1336 | + XFS_BMAPI_ENTIRE, NULL, 0, bmp, &num, NULL, NULL); | |
1337 | + | |
1338 | + xfs_iunlock_map_shared(ip, lock); | |
1339 | + xfs_iunlock(ip, XFS_IOLOCK_SHARED); | |
1340 | + | |
1341 | + if (error) { | |
1342 | + error = -error; /* Return negative error to DMAPI */ | |
1343 | + goto finish_out; | |
1344 | + } | |
1345 | + | |
1346 | + /* Fill in the caller's extents, adjusting the bias in the | |
1347 | + first entry if necessary. | |
1348 | + */ | |
1349 | + | |
1350 | + for (i = 0; i < num; i++, extentp++) { | |
1351 | + bias = startoff - XFS_FSB_TO_B(mp, bmp[i].br_startoff); | |
1352 | + extent.ex_offset = startoff; | |
1353 | + extent.ex_length = | |
1354 | + XFS_FSB_TO_B(mp, bmp[i].br_blockcount) - bias; | |
1355 | + if (bmp[i].br_startblock == HOLESTARTBLOCK) { | |
1356 | + extent.ex_type = DM_EXTENT_HOLE; | |
1357 | + } else { | |
1358 | + extent.ex_type = DM_EXTENT_RES; | |
1359 | + } | |
1360 | + startoff = extent.ex_offset + extent.ex_length; | |
1361 | + | |
1362 | + if (copy_to_user( extentp, &extent, sizeof(extent))) { | |
1363 | + error = -EFAULT; | |
1364 | + goto finish_out; | |
1365 | + } | |
1366 | + | |
1367 | + fsb_bias = fsb_offset - bmp[i].br_startoff; | |
1368 | + fsb_offset += bmp[i].br_blockcount - fsb_bias; | |
1369 | + fsb_length -= bmp[i].br_blockcount - fsb_bias; | |
1370 | + elem++; | |
1371 | + } | |
1372 | + } | |
1373 | + | |
1374 | + if (fsb_length == 0) { | |
1375 | + startoff = 0; | |
1376 | + } | |
1377 | + if (copy_to_user( offp, &startoff, sizeof(startoff))) { | |
1378 | + error = -EFAULT; | |
1379 | + goto finish_out; | |
1380 | + } | |
1381 | + | |
1382 | + if (copy_to_user( nelemp, &elem, sizeof(elem))) { | |
1383 | + error = -EFAULT; | |
1384 | + goto finish_out; | |
1385 | + } | |
1386 | + | |
1387 | + *rvp = (fsb_length == 0 ? 0 : 1); | |
1388 | + | |
1389 | +finish_out: | |
1390 | + if (bmp) | |
1391 | + kmem_free(bmp); | |
1392 | + return(error); | |
1393 | +} | |
1394 | + | |
1395 | + | |
1396 | +STATIC int | |
1397 | +xfs_dm_zero_xstatinfo_link( | |
1398 | + dm_xstat_t __user *dxs) | |
1399 | +{ | |
1400 | + dm_xstat_t *ldxs; | |
1401 | + int error = 0; | |
1402 | + | |
1403 | + if (!dxs) | |
1404 | + return 0; | |
1405 | + ldxs = kmalloc(sizeof(*ldxs), GFP_KERNEL); | |
1406 | + if (!ldxs) | |
1407 | + return -ENOMEM; | |
1408 | + if (copy_from_user(ldxs, dxs, sizeof(*dxs))) { | |
1409 | + error = -EFAULT; | |
1410 | + } else { | |
1411 | + ldxs->dx_statinfo._link = 0; | |
1412 | + if (copy_to_user(dxs, ldxs, sizeof(*dxs))) | |
1413 | + error = -EFAULT; | |
1414 | + } | |
1415 | + kfree(ldxs); | |
1416 | + return error; | |
1417 | +} | |
1418 | + | |
1419 | +/* ARGSUSED */ | |
1420 | +STATIC int | |
1421 | +xfs_dm_get_bulkall_rvp( | |
1422 | + struct inode *inode, | |
1423 | + dm_right_t right, | |
1424 | + u_int mask, | |
1425 | + dm_attrname_t __user *attrnamep, | |
1426 | + dm_attrloc_t __user *locp, | |
1427 | + size_t buflen, | |
1428 | + void __user *bufp, /* address of buffer in user space */ | |
1429 | + size_t __user *rlenp, /* user space address */ | |
1430 | + int *rvalp) | |
1431 | +{ | |
1432 | + int error, done; | |
1433 | + int nelems; | |
1434 | + u_int statstruct_sz; | |
1435 | + dm_attrloc_t loc; | |
1436 | + xfs_mount_t *mp = XFS_I(inode)->i_mount; | |
1437 | + dm_attrname_t attrname; | |
1438 | + dm_bulkstat_one_t dmb; | |
1439 | + | |
1440 | + /* Returns negative errors to DMAPI */ | |
1441 | + | |
1442 | + if (copy_from_user(&attrname, attrnamep, sizeof(attrname)) || | |
1443 | + copy_from_user(&loc, locp, sizeof(loc))) | |
1444 | + return -EFAULT; | |
1445 | + | |
1446 | + if (attrname.an_chars[0] == '\0') | |
1447 | + return(-EINVAL); | |
1448 | + | |
1449 | + if (right < DM_RIGHT_SHARED) | |
1450 | + return(-EACCES); | |
1451 | + | |
1452 | + /* Because we will write directly to the user's buffer, make sure that | |
1453 | + the buffer is properly aligned. | |
1454 | + */ | |
1455 | + | |
1456 | + if (((unsigned long)bufp & (DM_STAT_ALIGN - 1)) != 0) | |
1457 | + return(-EFAULT); | |
1458 | + | |
1459 | + /* Size of the handle is constant for this function. | |
1460 | + * If there are no files with attributes, then this will be the | |
1461 | + * maximum number of inodes we can get. | |
1462 | + */ | |
1463 | + | |
1464 | + statstruct_sz = DM_STAT_SIZE(dm_xstat_t, 0); | |
1465 | + statstruct_sz = (statstruct_sz+(DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
1466 | + | |
1467 | + nelems = buflen / statstruct_sz; | |
1468 | + if (nelems < 1) { | |
1469 | + if (put_user( statstruct_sz, rlenp )) | |
1470 | + return(-EFAULT); | |
1471 | + return(-E2BIG); | |
1472 | + } | |
1473 | + | |
1474 | + /* Build the on-disk version of the attribute name. */ | |
1475 | + strcpy(dmb.attrname.dan_chars, dmattr_prefix); | |
1476 | + strncpy(&dmb.attrname.dan_chars[DMATTR_PREFIXLEN], | |
1477 | + attrname.an_chars, DM_ATTR_NAME_SIZE + 1); | |
1478 | + dmb.attrname.dan_chars[sizeof(dmb.attrname.dan_chars) - 1] = '\0'; | |
1479 | + | |
1480 | + /* | |
1481 | + * fill the buffer with dm_xstat_t's | |
1482 | + */ | |
1483 | + | |
1484 | + dmb.laststruct = NULL; | |
1485 | + memcpy(&dmb.fsid, mp->m_fixedfsid, sizeof(dm_fsid_t)); | |
1486 | + error = xfs_bulkstat(mp, (xfs_ino_t *)&loc, &nelems, | |
1487 | + xfs_dm_bulkall_one, (void*)&dmb, statstruct_sz, | |
1488 | + bufp, BULKSTAT_FG_INLINE, &done); | |
1489 | + if (error) | |
1490 | + return(-error); /* Return negative error to DMAPI */ | |
1491 | + | |
1492 | + *rvalp = !done ? 1 : 0; | |
1493 | + | |
1494 | + if (put_user( statstruct_sz * nelems, rlenp )) | |
1495 | + return(-EFAULT); | |
1496 | + | |
1497 | + if (copy_to_user( locp, &loc, sizeof(loc))) | |
1498 | + return(-EFAULT); | |
1499 | + /* | |
1500 | + * If we didn't do any, we must not have any more to do. | |
1501 | + */ | |
1502 | + if (nelems < 1) | |
1503 | + return(0); | |
1504 | + /* | |
1505 | + * Set _link in the last struct to zero | |
1506 | + */ | |
1507 | + return xfs_dm_zero_xstatinfo_link((dm_xstat_t __user *)dmb.laststruct); | |
1508 | +} | |
1509 | + | |
1510 | + | |
1511 | +STATIC int | |
1512 | +xfs_dm_zero_statinfo_link( | |
1513 | + dm_stat_t __user *dxs) | |
1514 | +{ | |
1515 | + dm_stat_t *ldxs; | |
1516 | + int error = 0; | |
1517 | + | |
1518 | + if (!dxs) | |
1519 | + return 0; | |
1520 | + ldxs = kmalloc(sizeof(*ldxs), GFP_KERNEL); | |
1521 | + if (!ldxs) | |
1522 | + return -ENOMEM; | |
1523 | + if (copy_from_user(ldxs, dxs, sizeof(*dxs))) { | |
1524 | + error = -EFAULT; | |
1525 | + } else { | |
1526 | + ldxs->_link = 0; | |
1527 | + if (copy_to_user(dxs, ldxs, sizeof(*dxs))) | |
1528 | + error = -EFAULT; | |
1529 | + } | |
1530 | + kfree(ldxs); | |
1531 | + return error; | |
1532 | +} | |
1533 | + | |
1534 | +/* ARGSUSED */ | |
1535 | +STATIC int | |
1536 | +xfs_dm_get_bulkattr_rvp( | |
1537 | + struct inode *inode, | |
1538 | + dm_right_t right, | |
1539 | + u_int mask, | |
1540 | + dm_attrloc_t __user *locp, | |
1541 | + size_t buflen, | |
1542 | + void __user *bufp, | |
1543 | + size_t __user *rlenp, | |
1544 | + int *rvalp) | |
1545 | +{ | |
1546 | + int error, done; | |
1547 | + int nelems; | |
1548 | + u_int statstruct_sz; | |
1549 | + dm_attrloc_t loc; | |
1550 | + xfs_mount_t *mp = XFS_I(inode)->i_mount; | |
1551 | + dm_bulkstat_one_t dmb; | |
1552 | + | |
1553 | + /* Returns negative errors to DMAPI */ | |
1554 | + | |
1555 | + if (right < DM_RIGHT_SHARED) | |
1556 | + return(-EACCES); | |
1557 | + | |
1558 | + if (copy_from_user( &loc, locp, sizeof(loc))) | |
1559 | + return(-EFAULT); | |
1560 | + | |
1561 | + /* Because we will write directly to the user's buffer, make sure that | |
1562 | + the buffer is properly aligned. | |
1563 | + */ | |
1564 | + | |
1565 | + if (((unsigned long)bufp & (DM_STAT_ALIGN - 1)) != 0) | |
1566 | + return(-EFAULT); | |
1567 | + | |
1568 | + /* size of the handle is constant for this function */ | |
1569 | + | |
1570 | + statstruct_sz = DM_STAT_SIZE(dm_stat_t, 0); | |
1571 | + statstruct_sz = (statstruct_sz+(DM_STAT_ALIGN-1)) & ~(DM_STAT_ALIGN-1); | |
1572 | + | |
1573 | + nelems = buflen / statstruct_sz; | |
1574 | + if (nelems < 1) { | |
1575 | + if (put_user( statstruct_sz, rlenp )) | |
1576 | + return(-EFAULT); | |
1577 | + return(-E2BIG); | |
1578 | + } | |
1579 | + | |
1580 | + dmb.laststruct = NULL; | |
1581 | + memcpy(&dmb.fsid, mp->m_fixedfsid, sizeof(dm_fsid_t)); | |
1582 | + error = xfs_bulkstat(mp, (xfs_ino_t *)&loc, &nelems, | |
1583 | + xfs_dm_bulkattr_one, (void*)&dmb, | |
1584 | + statstruct_sz, bufp, BULKSTAT_FG_INLINE, &done); | |
1585 | + if (error) | |
1586 | + return(-error); /* Return negative error to DMAPI */ | |
1587 | + | |
1588 | + *rvalp = !done ? 1 : 0; | |
1589 | + | |
1590 | + if (put_user( statstruct_sz * nelems, rlenp )) | |
1591 | + return(-EFAULT); | |
1592 | + | |
1593 | + if (copy_to_user( locp, &loc, sizeof(loc))) | |
1594 | + return(-EFAULT); | |
1595 | + | |
1596 | + /* | |
1597 | + * If we didn't do any, we must not have any more to do. | |
1598 | + */ | |
1599 | + if (nelems < 1) | |
1600 | + return(0); | |
1601 | + /* | |
1602 | + * Set _link in the last struct to zero | |
1603 | + */ | |
1604 | + return xfs_dm_zero_statinfo_link((dm_stat_t __user *)dmb.laststruct); | |
1605 | +} | |
1606 | + | |
1607 | + | |
1608 | +/* ARGSUSED */ | |
1609 | +STATIC int | |
1610 | +xfs_dm_get_config( | |
1611 | + struct inode *inode, | |
1612 | + dm_right_t right, | |
1613 | + dm_config_t flagname, | |
1614 | + dm_size_t __user *retvalp) | |
1615 | +{ | |
1616 | + dm_size_t retval; | |
1617 | + | |
1618 | + /* Returns negative errors to DMAPI */ | |
1619 | + | |
1620 | + switch (flagname) { | |
1621 | + case DM_CONFIG_DTIME_OVERLOAD: | |
1622 | + case DM_CONFIG_PERS_ATTRIBUTES: | |
1623 | + case DM_CONFIG_PERS_EVENTS: | |
1624 | + case DM_CONFIG_PERS_MANAGED_REGIONS: | |
1625 | + case DM_CONFIG_PUNCH_HOLE: | |
1626 | + case DM_CONFIG_WILL_RETRY: | |
1627 | + retval = DM_TRUE; | |
1628 | + break; | |
1629 | + | |
1630 | + case DM_CONFIG_CREATE_BY_HANDLE: /* these will never be done */ | |
1631 | + case DM_CONFIG_LOCK_UPGRADE: | |
1632 | + case DM_CONFIG_PERS_INHERIT_ATTRIBS: | |
1633 | + retval = DM_FALSE; | |
1634 | + break; | |
1635 | + | |
1636 | + case DM_CONFIG_BULKALL: | |
1637 | + retval = DM_TRUE; | |
1638 | + break; | |
1639 | + case DM_CONFIG_MAX_ATTR_ON_DESTROY: | |
1640 | + retval = DM_MAX_ATTR_BYTES_ON_DESTROY; | |
1641 | + break; | |
1642 | + | |
1643 | + case DM_CONFIG_MAX_ATTRIBUTE_SIZE: | |
1644 | + retval = ATTR_MAX_VALUELEN; | |
1645 | + break; | |
1646 | + | |
1647 | + case DM_CONFIG_MAX_HANDLE_SIZE: | |
1648 | + retval = DM_MAX_HANDLE_SIZE; | |
1649 | + break; | |
1650 | + | |
1651 | + case DM_CONFIG_MAX_MANAGED_REGIONS: | |
1652 | + retval = 1; | |
1653 | + break; | |
1654 | + | |
1655 | + case DM_CONFIG_TOTAL_ATTRIBUTE_SPACE: | |
1656 | + retval = 0x7fffffff; /* actually it's unlimited */ | |
1657 | + break; | |
1658 | + | |
1659 | + default: | |
1660 | + return(-EINVAL); | |
1661 | + } | |
1662 | + | |
1663 | + /* Copy the results back to the user. */ | |
1664 | + | |
1665 | + if (copy_to_user( retvalp, &retval, sizeof(retval))) | |
1666 | + return(-EFAULT); | |
1667 | + return(0); | |
1668 | +} | |
1669 | + | |
1670 | + | |
1671 | +/* ARGSUSED */ | |
1672 | +STATIC int | |
1673 | +xfs_dm_get_config_events( | |
1674 | + struct inode *inode, | |
1675 | + dm_right_t right, | |
1676 | + u_int nelem, | |
1677 | + dm_eventset_t __user *eventsetp, | |
1678 | + u_int __user *nelemp) | |
1679 | +{ | |
1680 | + dm_eventset_t eventset; | |
1681 | + | |
1682 | + /* Returns negative errors to DMAPI */ | |
1683 | + | |
1684 | + if (nelem == 0) | |
1685 | + return(-EINVAL); | |
1686 | + | |
1687 | + eventset = DM_XFS_SUPPORTED_EVENTS; | |
1688 | + | |
1689 | + /* Now copy the event mask and event count back to the caller. We | |
1690 | + return the lesser of nelem and DM_EVENT_MAX. | |
1691 | + */ | |
1692 | + | |
1693 | + if (nelem > DM_EVENT_MAX) | |
1694 | + nelem = DM_EVENT_MAX; | |
1695 | + eventset &= (1 << nelem) - 1; | |
1696 | + | |
1697 | + if (copy_to_user( eventsetp, &eventset, sizeof(eventset))) | |
1698 | + return(-EFAULT); | |
1699 | + | |
1700 | + if (put_user(nelem, nelemp)) | |
1701 | + return(-EFAULT); | |
1702 | + return(0); | |
1703 | +} | |
1704 | + | |
1705 | + | |
1706 | +/* ARGSUSED */ | |
1707 | +STATIC int | |
1708 | +xfs_dm_get_destroy_dmattr( | |
1709 | + struct inode *inode, | |
1710 | + dm_right_t right, | |
1711 | + dm_attrname_t *attrnamep, | |
1712 | + char **valuepp, | |
1713 | + int *vlenp) | |
1714 | +{ | |
1715 | + dm_dkattrname_t dkattrname; | |
1716 | + int alloc_size; | |
1717 | + int value_len; | |
1718 | + char *value; | |
1719 | + int error; | |
1720 | + | |
1721 | + /* Returns negative errors to DMAPI */ | |
1722 | + | |
1723 | + *vlenp = -1; /* assume failure by default */ | |
1724 | + | |
1725 | + if (attrnamep->an_chars[0] == '\0') | |
1726 | + return(-EINVAL); | |
1727 | + | |
1728 | + /* Build the on-disk version of the attribute name. */ | |
1729 | + | |
1730 | + strcpy(dkattrname.dan_chars, dmattr_prefix); | |
1731 | + strncpy(&dkattrname.dan_chars[DMATTR_PREFIXLEN], | |
1732 | + (char *)attrnamep->an_chars, DM_ATTR_NAME_SIZE + 1); | |
1733 | + dkattrname.dan_chars[sizeof(dkattrname.dan_chars) - 1] = '\0'; | |
1734 | + | |
1735 | + /* xfs_attr_get will not return anything if the buffer is too small, | |
1736 | + and we don't know how big to make the buffer, so this may take | |
1737 | + two tries to get it right. The initial try must use a buffer of | |
1738 | + at least XFS_BUG_KLUDGE bytes to prevent buffer overflow because | |
1739 | + of a bug in XFS. | |
1740 | + */ | |
1741 | + | |
1742 | + alloc_size = XFS_BUG_KLUDGE; | |
1743 | + value = kmalloc(alloc_size, GFP_KERNEL); | |
1744 | + if (value == NULL) | |
1745 | + return(-ENOMEM); | |
1746 | + | |
1747 | + error = xfs_attr_get(XFS_I(inode), dkattrname.dan_chars, value, | |
1748 | + &value_len, ATTR_ROOT); | |
1749 | + if (error == ERANGE) { | |
1750 | + kfree(value); | |
1751 | + alloc_size = value_len; | |
1752 | + value = kmalloc(alloc_size, GFP_KERNEL); | |
1753 | + if (value == NULL) | |
1754 | + return(-ENOMEM); | |
1755 | + | |
1756 | + error = xfs_attr_get(XFS_I(inode), dkattrname.dan_chars, value, | |
1757 | + &value_len, ATTR_ROOT); | |
1758 | + } | |
1759 | + if (error) { | |
1760 | + kfree(value); | |
1761 | + DM_EA_XLATE_ERR(error); | |
1762 | + return(-error); /* Return negative error to DMAPI */ | |
1763 | + } | |
1764 | + | |
1765 | + /* The attribute exists and has a value. Note that a value_len of | |
1766 | + zero is valid! | |
1767 | + */ | |
1768 | + | |
1769 | + if (value_len == 0) { | |
1770 | + kfree(value); | |
1771 | + *vlenp = 0; | |
1772 | + return(0); | |
1773 | + } else if (value_len > DM_MAX_ATTR_BYTES_ON_DESTROY) { | |
1774 | + char *value2; | |
1775 | + | |
1776 | + value2 = kmalloc(DM_MAX_ATTR_BYTES_ON_DESTROY, GFP_KERNEL); | |
1777 | + if (value2 == NULL) { | |
1778 | + kfree(value); | |
1779 | + return(-ENOMEM); | |
1780 | + } | |
1781 | + memcpy(value2, value, DM_MAX_ATTR_BYTES_ON_DESTROY); | |
1782 | + kfree(value); | |
1783 | + value = value2; | |
1784 | + value_len = DM_MAX_ATTR_BYTES_ON_DESTROY; | |
1785 | + } | |
1786 | + *vlenp = value_len; | |
1787 | + *valuepp = value; | |
1788 | + return(0); | |
1789 | +} | |
1790 | + | |
1791 | +/* This code was taken from xfs_fcntl(F_DIOINFO) and modified slightly because | |
1792 | + we don't have a flags parameter (no open file). | |
1793 | + Taken from xfs_ioctl(XFS_IOC_DIOINFO) on Linux. | |
1794 | +*/ | |
1795 | + | |
1796 | +STATIC int | |
1797 | +xfs_dm_get_dioinfo( | |
1798 | + struct inode *inode, | |
1799 | + dm_right_t right, | |
1800 | + dm_dioinfo_t __user *diop) | |
1801 | +{ | |
1802 | + dm_dioinfo_t dio; | |
1803 | + xfs_mount_t *mp; | |
1804 | + xfs_inode_t *ip = XFS_I(inode); | |
1805 | + | |
1806 | + /* Returns negative errors to DMAPI */ | |
1807 | + | |
1808 | + if (right < DM_RIGHT_SHARED) | |
1809 | + return(-EACCES); | |
1810 | + | |
1811 | + mp = ip->i_mount; | |
1812 | + | |
1813 | + dio.d_miniosz = dio.d_mem = MIN_DIO_SIZE(mp); | |
1814 | + dio.d_maxiosz = MAX_DIO_SIZE(mp); | |
1815 | + dio.d_dio_only = DM_FALSE; | |
1816 | + | |
1817 | + if (copy_to_user(diop, &dio, sizeof(dio))) | |
1818 | + return(-EFAULT); | |
1819 | + return(0); | |
1820 | +} | |
1821 | + | |
1822 | +typedef struct dm_readdir_cb { | |
1823 | + xfs_mount_t *mp; | |
1824 | + char __user *ubuf; | |
1825 | + dm_stat_t __user *lastbuf; | |
1826 | + size_t spaceleft; | |
1827 | + size_t nwritten; | |
1828 | + int error; | |
1829 | + dm_stat_t kstat; | |
1830 | +} dm_readdir_cb_t; | |
1831 | + | |
1832 | +STATIC int | |
1833 | +dm_filldir(void *__buf, const char *name, int namelen, loff_t offset, | |
1834 | + u64 ino, unsigned int d_type) | |
1835 | +{ | |
1836 | + dm_readdir_cb_t *cb = __buf; | |
1837 | + dm_stat_t *statp = &cb->kstat; | |
1838 | + size_t len; | |
1839 | + int error; | |
1840 | + int needed; | |
1841 | + | |
1842 | + /* | |
1843 | + * Make sure we have enough space. | |
1844 | + */ | |
1845 | + needed = dm_stat_size(namelen + 1); | |
1846 | + if (cb->spaceleft < needed) { | |
1847 | + cb->spaceleft = 0; | |
1848 | + return -ENOSPC; | |
1849 | + } | |
1850 | + | |
1851 | + error = -EINVAL; | |
1852 | + if (xfs_internal_inum(cb->mp, ino)) | |
1853 | + goto out_err; | |
1854 | + | |
1855 | + memset(statp, 0, dm_stat_size(MAXNAMLEN)); | |
1856 | + error = -xfs_dm_bulkattr_iget_one(cb->mp, ino, 0, | |
1857 | + statp, needed); | |
1858 | + if (error) | |
1859 | + goto out_err; | |
1860 | + | |
1861 | + /* | |
1862 | + * On return from bulkstat_one(), stap->_link points | |
1863 | + * at the end of the handle in the stat structure. | |
1864 | + */ | |
1865 | + statp->dt_compname.vd_offset = statp->_link; | |
1866 | + statp->dt_compname.vd_length = namelen + 1; | |
1867 | + | |
1868 | + len = statp->_link; | |
1869 | + | |
1870 | + /* Word-align the record */ | |
1871 | + statp->_link = dm_stat_align(len + namelen + 1); | |
1872 | + | |
1873 | + error = -EFAULT; | |
1874 | + if (copy_to_user(cb->ubuf, statp, len)) | |
1875 | + goto out_err; | |
1876 | + if (copy_to_user(cb->ubuf + len, name, namelen)) | |
1877 | + goto out_err; | |
1878 | + if (put_user(0, cb->ubuf + len + namelen)) | |
1879 | + goto out_err; | |
1880 | + | |
1881 | + cb->lastbuf = (dm_stat_t __user *)cb->ubuf; | |
1882 | + cb->spaceleft -= statp->_link; | |
1883 | + cb->nwritten += statp->_link; | |
1884 | + cb->ubuf += statp->_link; | |
1885 | + | |
1886 | + return 0; | |
1887 | + | |
1888 | + out_err: | |
1889 | + cb->error = error; | |
1890 | + return error; | |
1891 | +} | |
1892 | + | |
1893 | +/* Returns negative errors to DMAPI */ | |
1894 | +STATIC int | |
1895 | +xfs_dm_get_dirattrs_rvp( | |
1896 | + struct inode *inode, | |
1897 | + dm_right_t right, | |
1898 | + u_int mask, | |
1899 | + dm_attrloc_t __user *locp, | |
1900 | + size_t buflen, | |
1901 | + void __user *bufp, | |
1902 | + size_t __user *rlenp, | |
1903 | + int *rvp) | |
1904 | +{ | |
1905 | + xfs_inode_t *dp = XFS_I(inode); | |
1906 | + xfs_mount_t *mp = dp->i_mount; | |
1907 | + dm_readdir_cb_t *cb; | |
1908 | + dm_attrloc_t loc; | |
1909 | + int error; | |
1910 | + | |
1911 | + if (right < DM_RIGHT_SHARED) | |
1912 | + return -EACCES; | |
1913 | + | |
1914 | + /* | |
1915 | + * Make sure that the buffer is properly aligned. | |
1916 | + */ | |
1917 | + if (((unsigned long)bufp & (DM_STAT_ALIGN - 1)) != 0) | |
1918 | + return -EFAULT; | |
1919 | + | |
1920 | + if (mask & ~(DM_AT_HANDLE|DM_AT_EMASK|DM_AT_PMANR|DM_AT_PATTR| | |
1921 | + DM_AT_DTIME|DM_AT_CFLAG|DM_AT_STAT)) | |
1922 | + return -EINVAL; | |
1923 | + | |
1924 | + if (!S_ISDIR(inode->i_mode)) | |
1925 | + return -EINVAL; | |
1926 | + | |
1927 | + /* | |
1928 | + * bufp should be able to fit at least one dm_stat entry including | |
1929 | + * dt_handle and full size MAXNAMLEN dt_compname. | |
1930 | + */ | |
1931 | + if (buflen < dm_stat_size(MAXNAMLEN)) | |
1932 | + return -ENOMEM; | |
1933 | + | |
1934 | + if (copy_from_user(&loc, locp, sizeof(loc))) | |
1935 | + return -EFAULT; | |
1936 | + | |
1937 | + cb = kzalloc(sizeof(*cb) + dm_stat_size(MAXNAMLEN), GFP_KERNEL); | |
1938 | + if (!cb) | |
1939 | + return -ENOMEM; | |
1940 | + | |
1941 | + cb->mp = mp; | |
1942 | + cb->spaceleft = buflen; | |
1943 | + cb->ubuf = bufp; | |
1944 | + | |
1945 | + mutex_lock(&inode->i_mutex); | |
1946 | + error = -ENOENT; | |
1947 | + if (!IS_DEADDIR(inode)) { | |
1948 | + error = -xfs_readdir(dp, cb, dp->i_size, | |
1949 | + (xfs_off_t *)&loc, dm_filldir); | |
1950 | + } | |
1951 | + mutex_unlock(&inode->i_mutex); | |
1952 | + | |
1953 | + if (error) | |
1954 | + goto out_kfree; | |
1955 | + if (cb->error) { | |
1956 | + error = cb->error; | |
1957 | + goto out_kfree; | |
1958 | + } | |
1959 | + | |
1960 | + error = -EFAULT; | |
1961 | + if (cb->lastbuf && put_user(0, &cb->lastbuf->_link)) | |
1962 | + goto out_kfree; | |
1963 | + if (put_user(cb->nwritten, rlenp)) | |
1964 | + goto out_kfree; | |
1965 | + if (copy_to_user(locp, &loc, sizeof(loc))) | |
1966 | + goto out_kfree; | |
1967 | + | |
1968 | + if (cb->nwritten) | |
1969 | + *rvp = 1; | |
1970 | + else | |
1971 | + *rvp = 0; | |
1972 | + error = 0; | |
1973 | + | |
1974 | + out_kfree: | |
1975 | + kfree(cb); | |
1976 | + return error; | |
1977 | +} | |
1978 | + | |
1979 | +STATIC int | |
1980 | +xfs_dm_get_dmattr( | |
1981 | + struct inode *inode, | |
1982 | + dm_right_t right, | |
1983 | + dm_attrname_t __user *attrnamep, | |
1984 | + size_t buflen, | |
1985 | + void __user *bufp, | |
1986 | + size_t __user *rlenp) | |
1987 | +{ | |
1988 | + dm_dkattrname_t name; | |
1989 | + char *value; | |
1990 | + int value_len; | |
1991 | + int alloc_size; | |
1992 | + int error; | |
1993 | + | |
1994 | + /* Returns negative errors to DMAPI */ | |
1995 | + | |
1996 | + if (right < DM_RIGHT_SHARED) | |
1997 | + return(-EACCES); | |
1998 | + | |
1999 | + if ((error = xfs_copyin_attrname(attrnamep, &name)) != 0) | |
2000 | + return(-error); /* Return negative error to DMAPI */ | |
2001 | + | |
2002 | + /* Allocate a buffer to receive the attribute's value. We allocate | |
2003 | + at least one byte even if the caller specified a buflen of zero. | |
2004 | + (A buflen of zero is considered valid.) | |
2005 | + | |
2006 | + Allocating a minimum of XFS_BUG_KLUDGE bytes temporarily works | |
2007 | + around a bug within XFS in which in-inode attribute values are not | |
2008 | + checked to see if they will fit in the buffer before they are | |
2009 | + copied. Since no in-core attribute value can be larger than 256 | |
2010 | + bytes (an 8-bit size field), we allocate that minimum size here to | |
2011 | + prevent buffer overrun in both the kernel's and user's buffers. | |
2012 | + */ | |
2013 | + | |
2014 | + alloc_size = buflen; | |
2015 | + if (alloc_size < XFS_BUG_KLUDGE) | |
2016 | + alloc_size = XFS_BUG_KLUDGE; | |
2017 | + if (alloc_size > ATTR_MAX_VALUELEN) | |
2018 | + alloc_size = ATTR_MAX_VALUELEN; | |
2019 | + value = kmem_alloc(alloc_size, KM_SLEEP | KM_LARGE); | |
2020 | + | |
2021 | + /* Get the attribute's value. */ | |
2022 | + | |
2023 | + value_len = alloc_size; /* in/out parameter */ | |
2024 | + | |
2025 | + error = xfs_attr_get(XFS_I(inode), name.dan_chars, value, &value_len, | |
2026 | + ATTR_ROOT); | |
2027 | + DM_EA_XLATE_ERR(error); | |
2028 | + | |
2029 | + /* DMAPI requires an errno of ENOENT if an attribute does not exist, | |
2030 | + so remap ENOATTR here. | |
2031 | + */ | |
2032 | + | |
2033 | + if (error == ENOATTR) | |
2034 | + error = ENOENT; | |
2035 | + if (!error && value_len > buflen) | |
2036 | + error = E2BIG; | |
2037 | + if (!error && copy_to_user(bufp, value, value_len)) | |
2038 | + error = EFAULT; | |
2039 | + if (!error || error == E2BIG) { | |
2040 | + if (put_user(value_len, rlenp)) | |
2041 | + error = EFAULT; | |
2042 | + } | |
2043 | + | |
2044 | + kmem_free(value); | |
2045 | + return(-error); /* Return negative error to DMAPI */ | |
2046 | +} | |
2047 | + | |
2048 | +STATIC int | |
2049 | +xfs_dm_get_eventlist( | |
2050 | + struct inode *inode, | |
2051 | + dm_right_t right, | |
2052 | + u_int type, | |
2053 | + u_int nelem, | |
2054 | + dm_eventset_t *eventsetp, | |
2055 | + u_int *nelemp) | |
2056 | +{ | |
2057 | + int error; | |
2058 | + xfs_inode_t *ip = XFS_I(inode); | |
2059 | + | |
2060 | + /* Returns negative errors to DMAPI */ | |
2061 | + | |
2062 | + if (type == DM_FSYS_OBJ) { | |
2063 | + error = xfs_dm_fs_get_eventlist(ip->i_mount, right, nelem, | |
2064 | + eventsetp, nelemp); | |
2065 | + } else { | |
2066 | + error = xfs_dm_f_get_eventlist(ip, right, nelem, | |
2067 | + eventsetp, nelemp); | |
2068 | + } | |
2069 | + return(-error); /* Returns negative error to DMAPI */ | |
2070 | +} | |
2071 | + | |
2072 | + | |
2073 | +/* ARGSUSED */ | |
2074 | +STATIC int | |
2075 | +xfs_dm_get_fileattr( | |
2076 | + struct inode *inode, | |
2077 | + dm_right_t right, | |
2078 | + u_int mask, /* not used; always return everything */ | |
2079 | + dm_stat_t __user *statp) | |
2080 | +{ | |
2081 | + dm_stat_t stat; | |
2082 | + xfs_inode_t *ip = XFS_I(inode); | |
2083 | + xfs_mount_t *mp; | |
2084 | + | |
2085 | + /* Returns negative errors to DMAPI */ | |
2086 | + | |
2087 | + if (right < DM_RIGHT_SHARED) | |
2088 | + return(-EACCES); | |
2089 | + | |
2090 | + /* Find the mount point. */ | |
2091 | + | |
2092 | + mp = ip->i_mount; | |
2093 | + | |
2094 | + xfs_ilock(ip, XFS_ILOCK_SHARED); | |
2095 | + xfs_ip_to_stat(mp, ip->i_ino, ip, &stat); | |
2096 | + xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
2097 | + | |
2098 | + if (copy_to_user( statp, &stat, sizeof(stat))) | |
2099 | + return(-EFAULT); | |
2100 | + return(0); | |
2101 | +} | |
2102 | + | |
2103 | + | |
2104 | +/* We currently only support a maximum of one managed region per file, and | |
2105 | + use the DM_EVENT_READ, DM_EVENT_WRITE, and DM_EVENT_TRUNCATE events in | |
2106 | + the file's dm_eventset_t event mask to implement the DM_REGION_READ, | |
2107 | + DM_REGION_WRITE, and DM_REGION_TRUNCATE flags for that single region. | |
2108 | +*/ | |
2109 | + | |
2110 | +STATIC int | |
2111 | +xfs_dm_get_region( | |
2112 | + struct inode *inode, | |
2113 | + dm_right_t right, | |
2114 | + u_int nelem, | |
2115 | + dm_region_t __user *regbufp, | |
2116 | + u_int __user *nelemp) | |
2117 | +{ | |
2118 | + dm_eventset_t evmask; | |
2119 | + dm_region_t region; | |
2120 | + xfs_inode_t *ip = XFS_I(inode); | |
2121 | + u_int elem; | |
2122 | + | |
2123 | + /* Returns negative errors to DMAPI */ | |
2124 | + | |
2125 | + if (right < DM_RIGHT_SHARED) | |
2126 | + return(-EACCES); | |
2127 | + | |
2128 | + evmask = ip->i_d.di_dmevmask; /* read the mask "atomically" */ | |
2129 | + | |
2130 | + /* Get the file's current managed region flags out of the | |
2131 | + dm_eventset_t mask and use them to build a managed region that | |
2132 | + covers the entire file, i.e. set rg_offset and rg_size to zero. | |
2133 | + */ | |
2134 | + | |
2135 | + memset((char *)®ion, 0, sizeof(region)); | |
2136 | + | |
2137 | + if (evmask & (1 << DM_EVENT_READ)) | |
2138 | + region.rg_flags |= DM_REGION_READ; | |
2139 | + if (evmask & (1 << DM_EVENT_WRITE)) | |
2140 | + region.rg_flags |= DM_REGION_WRITE; | |
2141 | + if (evmask & (1 << DM_EVENT_TRUNCATE)) | |
2142 | + region.rg_flags |= DM_REGION_TRUNCATE; | |
2143 | + | |
2144 | + elem = (region.rg_flags ? 1 : 0); | |
2145 | + | |
2146 | + if (copy_to_user( nelemp, &elem, sizeof(elem))) | |
2147 | + return(-EFAULT); | |
2148 | + if (elem > nelem) | |
2149 | + return(-E2BIG); | |
2150 | + if (elem && copy_to_user(regbufp, ®ion, sizeof(region))) | |
2151 | + return(-EFAULT); | |
2152 | + return(0); | |
2153 | +} | |
2154 | + | |
2155 | + | |
2156 | +STATIC int | |
2157 | +xfs_dm_getall_dmattr( | |
2158 | + struct inode *inode, | |
2159 | + dm_right_t right, | |
2160 | + size_t buflen, | |
2161 | + void __user *bufp, | |
2162 | + size_t __user *rlenp) | |
2163 | +{ | |
2164 | + attrlist_cursor_kern_t cursor; | |
2165 | + attrlist_t *attrlist; | |
2166 | + dm_attrlist_t __user *ulist; | |
2167 | + int *last_link; | |
2168 | + int alignment; | |
2169 | + int total_size; | |
2170 | + int list_size = 8192; /* should be big enough */ | |
2171 | + int error; | |
2172 | + | |
2173 | + /* Returns negative errors to DMAPI */ | |
2174 | + | |
2175 | + if (right < DM_RIGHT_SHARED) | |
2176 | + return(-EACCES); | |
2177 | + | |
2178 | + /* Verify that the user gave us a buffer that is 4-byte aligned, lock | |
2179 | + it down, and work directly within that buffer. As a side-effect, | |
2180 | + values of buflen < sizeof(int) return EINVAL. | |
2181 | + */ | |
2182 | + | |
2183 | + alignment = sizeof(int) - 1; | |
2184 | + if ((((__psint_t)bufp & alignment) != 0) || | |
2185 | + !access_ok(VERIFY_WRITE, bufp, buflen)) { | |
2186 | + return(-EFAULT); | |
2187 | + } | |
2188 | + buflen &= ~alignment; /* round down the alignment */ | |
2189 | + | |
2190 | + /* Initialize all the structures and variables for the main loop. */ | |
2191 | + | |
2192 | + memset(&cursor, 0, sizeof(cursor)); | |
2193 | + attrlist = (attrlist_t *)kmem_alloc(list_size, KM_SLEEP); | |
2194 | + total_size = 0; | |
2195 | + ulist = (dm_attrlist_t *)bufp; | |
2196 | + last_link = NULL; | |
2197 | + | |
2198 | + /* Use vop_attr_list to get the names of DMAPI attributes, and use | |
2199 | + vop_attr_get to get their values. There is a risk here that the | |
2200 | + DMAPI attributes could change between the vop_attr_list and | |
2201 | + vop_attr_get calls. If we can detect it, we return EIO to notify | |
2202 | + the user. | |
2203 | + */ | |
2204 | + | |
2205 | + do { | |
2206 | + int i; | |
2207 | + | |
2208 | + /* Get a buffer full of attribute names. If there aren't any | |
2209 | + more or if we encounter an error, then finish up. | |
2210 | + */ | |
2211 | + | |
2212 | + error = xfs_attr_list(XFS_I(inode), (char *)attrlist, list_size, | |
2213 | + ATTR_ROOT, &cursor); | |
2214 | + DM_EA_XLATE_ERR(error); | |
2215 | + | |
2216 | + if (error || attrlist->al_count == 0) | |
2217 | + break; | |
2218 | + | |
2219 | + for (i = 0; i < attrlist->al_count; i++) { | |
2220 | + attrlist_ent_t *entry; | |
2221 | + char *user_name; | |
2222 | + int size_needed; | |
2223 | + int value_len; | |
2224 | + | |
2225 | + /* Skip over all non-DMAPI attributes. If the | |
2226 | + attribute name is too long, we assume it is | |
2227 | + non-DMAPI even if it starts with the correct | |
2228 | + prefix. | |
2229 | + */ | |
2230 | + | |
2231 | + entry = ATTR_ENTRY(attrlist, i); | |
2232 | + if (strncmp(entry->a_name, dmattr_prefix, DMATTR_PREFIXLEN)) | |
2233 | + continue; | |
2234 | + user_name = &entry->a_name[DMATTR_PREFIXLEN]; | |
2235 | + if (strlen(user_name) > DM_ATTR_NAME_SIZE) | |
2236 | + continue; | |
2237 | + | |
2238 | + /* We have a valid DMAPI attribute to return. If it | |
2239 | + won't fit in the user's buffer, we still need to | |
2240 | + keep track of the number of bytes for the user's | |
2241 | + next call. | |
2242 | + */ | |
2243 | + | |
2244 | + | |
2245 | + size_needed = sizeof(*ulist) + entry->a_valuelen; | |
2246 | + size_needed = (size_needed + alignment) & ~alignment; | |
2247 | + | |
2248 | + total_size += size_needed; | |
2249 | + if (total_size > buflen) | |
2250 | + continue; | |
2251 | + | |
2252 | + /* Start by filling in all the fields in the | |
2253 | + dm_attrlist_t structure. | |
2254 | + */ | |
2255 | + | |
2256 | + strncpy((char *)ulist->al_name.an_chars, user_name, | |
2257 | + DM_ATTR_NAME_SIZE); | |
2258 | + ulist->al_data.vd_offset = sizeof(*ulist); | |
2259 | + ulist->al_data.vd_length = entry->a_valuelen; | |
2260 | + ulist->_link = size_needed; | |
2261 | + last_link = &ulist->_link; | |
2262 | + | |
2263 | + /* Next read the attribute's value into its correct | |
2264 | + location after the dm_attrlist structure. Any sort | |
2265 | + of error indicates that the data is moving under us, | |
2266 | + so we return EIO to let the user know. | |
2267 | + */ | |
2268 | + | |
2269 | + value_len = entry->a_valuelen; | |
2270 | + | |
2271 | + error = xfs_attr_get(XFS_I(inode), entry->a_name, | |
2272 | + (void *)(ulist + 1), &value_len, | |
2273 | + ATTR_ROOT); | |
2274 | + DM_EA_XLATE_ERR(error); | |
2275 | + | |
2276 | + if (error || value_len != entry->a_valuelen) { | |
2277 | + error = EIO; | |
2278 | + break; | |
2279 | + } | |
2280 | + | |
2281 | + ulist = (dm_attrlist_t *)((char *)ulist + ulist->_link); | |
2282 | + } | |
2283 | + } while (!error && attrlist->al_more); | |
2284 | + if (last_link) | |
2285 | + *last_link = 0; | |
2286 | + | |
2287 | + if (!error && total_size > buflen) | |
2288 | + error = E2BIG; | |
2289 | + if (!error || error == E2BIG) { | |
2290 | + if (put_user(total_size, rlenp)) | |
2291 | + error = EFAULT; | |
2292 | + } | |
2293 | + | |
2294 | + kmem_free(attrlist); | |
2295 | + return(-error); /* Return negative error to DMAPI */ | |
2296 | +} | |
2297 | + | |
2298 | + | |
2299 | +/* ARGSUSED */ | |
2300 | +STATIC int | |
2301 | +xfs_dm_getall_inherit( | |
2302 | + struct inode *inode, | |
2303 | + dm_right_t right, | |
2304 | + u_int nelem, | |
2305 | + dm_inherit_t __user *inheritbufp, | |
2306 | + u_int __user *nelemp) | |
2307 | +{ | |
2308 | + return(-ENOSYS); /* Return negative error to DMAPI */ | |
2309 | +} | |
2310 | + | |
2311 | + | |
2312 | +/* Initialize location pointer for subsequent dm_get_dirattrs, | |
2313 | + dm_get_bulkattr, and dm_get_bulkall calls. The same initialization must | |
2314 | + work for inode-based routines (dm_get_dirattrs) and filesystem-based | |
2315 | + routines (dm_get_bulkattr and dm_get_bulkall). Filesystem-based functions | |
2316 | + call this routine using the filesystem's root inode. | |
2317 | +*/ | |
2318 | + | |
2319 | +/* ARGSUSED */ | |
2320 | +STATIC int | |
2321 | +xfs_dm_init_attrloc( | |
2322 | + struct inode *inode, | |
2323 | + dm_right_t right, | |
2324 | + dm_attrloc_t __user *locp) | |
2325 | +{ | |
2326 | + dm_attrloc_t loc = 0; | |
2327 | + | |
2328 | + /* Returns negative errors to DMAPI */ | |
2329 | + | |
2330 | + if (right < DM_RIGHT_SHARED) | |
2331 | + return(-EACCES); | |
2332 | + | |
2333 | + if (copy_to_user( locp, &loc, sizeof(loc))) | |
2334 | + return(-EFAULT); | |
2335 | + return(0); | |
2336 | +} | |
2337 | + | |
2338 | + | |
2339 | +/* ARGSUSED */ | |
2340 | +STATIC int | |
2341 | +xfs_dm_mkdir_by_handle( | |
2342 | + struct inode *inode, | |
2343 | + dm_right_t right, | |
2344 | + void __user *hanp, | |
2345 | + size_t hlen, | |
2346 | + char __user *cname) | |
2347 | +{ | |
2348 | + return(-ENOSYS); /* Return negative error to DMAPI */ | |
2349 | +} | |
2350 | + | |
2351 | + | |
2352 | +/* | |
2353 | + * Probe and Punch | |
2354 | + * | |
2355 | + * Hole punching alignment is based on the underlying device base | |
2356 | + * allocation size. Because it is not defined in the DMAPI spec, we | |
2357 | + * can align how we choose here. Round inwards (offset up and length | |
2358 | + * down) to the block, extent or page size whichever is bigger. Our | |
2359 | + * DMAPI implementation rounds the hole geometry strictly inwards. If | |
2360 | + * this is not possible, return EINVAL for both for xfs_dm_probe_hole | |
2361 | + * and xfs_dm_punch_hole which differs from the DMAPI spec. Note that | |
2362 | + * length = 0 is special - it means "punch to EOF" and at that point | |
2363 | + * we treat the punch as remove everything past offset (including | |
2364 | + * preallocation past EOF). | |
2365 | + */ | |
2366 | + | |
2367 | +STATIC int | |
2368 | +xfs_dm_round_hole( | |
2369 | + dm_off_t offset, | |
2370 | + dm_size_t length, | |
2371 | + dm_size_t align, | |
2372 | + xfs_fsize_t filesize, | |
2373 | + dm_off_t *roff, | |
2374 | + dm_size_t *rlen) | |
2375 | +{ | |
2376 | + | |
2377 | + dm_off_t off = offset; | |
2378 | + dm_size_t len = length; | |
2379 | + | |
2380 | + /* Try to round offset up to the nearest boundary */ | |
2381 | + *roff = roundup_64(off, align); | |
2382 | + if ((*roff >= filesize) || (len && (len < align))) | |
2383 | + return -EINVAL; | |
2384 | + | |
2385 | + if ((len == 0) || ((off + len) == filesize)) { | |
2386 | + /* punch to EOF */ | |
2387 | + *rlen = 0; | |
2388 | + } else { | |
2389 | + /* Round length down to the nearest boundary. */ | |
2390 | + ASSERT(len >= align); | |
2391 | + ASSERT(align > (*roff - off)); | |
2392 | + len -= *roff - off; | |
2393 | + *rlen = len - do_mod(len, align); | |
2394 | + if (*rlen == 0) | |
2395 | + return -EINVAL; /* requested length is too small */ | |
2396 | + } | |
2397 | +#ifdef CONFIG_DMAPI_DEBUG | |
2398 | + printk("xfs_dm_round_hole: off %lu, len %ld, align %lu, " | |
2399 | + "filesize %llu, roff %ld, rlen %ld\n", | |
2400 | + offset, length, align, filesize, *roff, *rlen); | |
2401 | +#endif | |
2402 | + return 0; /* hole geometry successfully rounded */ | |
2403 | +} | |
2404 | + | |
2405 | +/* ARGSUSED */ | |
2406 | +STATIC int | |
2407 | +xfs_dm_probe_hole( | |
2408 | + struct inode *inode, | |
2409 | + dm_right_t right, | |
2410 | + dm_off_t off, | |
2411 | + dm_size_t len, | |
2412 | + dm_off_t __user *roffp, | |
2413 | + dm_size_t __user *rlenp) | |
2414 | +{ | |
2415 | + dm_off_t roff; | |
2416 | + dm_size_t rlen; | |
2417 | + xfs_inode_t *ip = XFS_I(inode); | |
2418 | + xfs_mount_t *mp; | |
2419 | + uint lock_flags; | |
2420 | + xfs_fsize_t realsize; | |
2421 | + dm_size_t align; | |
2422 | + int error; | |
2423 | + | |
2424 | + /* Returns negative errors to DMAPI */ | |
2425 | + | |
2426 | + if (right < DM_RIGHT_SHARED) | |
2427 | + return -EACCES; | |
2428 | + | |
2429 | + if ((ip->i_d.di_mode & S_IFMT) != S_IFREG) | |
2430 | + return -EINVAL; | |
2431 | + | |
2432 | + mp = ip->i_mount; | |
2433 | + lock_flags = XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL; | |
2434 | + xfs_ilock(ip, lock_flags); | |
2435 | + realsize = ip->i_size; | |
2436 | + xfs_iunlock(ip, lock_flags); | |
2437 | + | |
2438 | + if ((off + len) > realsize) | |
2439 | + return -E2BIG; | |
2440 | + | |
2441 | + align = 1 << mp->m_sb.sb_blocklog; | |
2442 | + | |
2443 | + error = xfs_dm_round_hole(off, len, align, realsize, &roff, &rlen); | |
2444 | + if (error) | |
2445 | + return error; | |
2446 | + | |
2447 | + if (copy_to_user( roffp, &roff, sizeof(roff))) | |
2448 | + return -EFAULT; | |
2449 | + if (copy_to_user( rlenp, &rlen, sizeof(rlen))) | |
2450 | + return -EFAULT; | |
2451 | + return(0); | |
2452 | +} | |
2453 | + | |
2454 | + | |
2455 | +STATIC int | |
2456 | +xfs_dm_punch_hole( | |
2457 | + struct inode *inode, | |
2458 | + dm_right_t right, | |
2459 | + dm_off_t off, | |
2460 | + dm_size_t len) | |
2461 | +{ | |
2462 | + xfs_flock64_t bf; | |
2463 | + int error = 0; | |
2464 | + xfs_inode_t *ip = XFS_I(inode); | |
2465 | + xfs_mount_t *mp; | |
2466 | + dm_size_t align; | |
2467 | + xfs_fsize_t realsize; | |
2468 | + dm_off_t roff; | |
2469 | + dm_size_t rlen; | |
2470 | + | |
2471 | + /* Returns negative errors to DMAPI */ | |
2472 | + | |
2473 | + if (right < DM_RIGHT_EXCL) | |
2474 | + return -EACCES; | |
2475 | + | |
2476 | + /* Make sure there are no leases. */ | |
2477 | + error = break_lease(inode, FMODE_WRITE); | |
2478 | + if (error) | |
2479 | + return -EBUSY; | |
2480 | + | |
2481 | + error = get_write_access(inode); | |
2482 | + if (error) | |
2483 | + return -EBUSY; | |
2484 | + | |
2485 | + mp = ip->i_mount; | |
2486 | + | |
2487 | + down_rw_sems(inode, DM_SEM_FLAG_WR); | |
2488 | + | |
2489 | + xfs_ilock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); | |
2490 | + realsize = ip->i_size; | |
2491 | + xfs_iunlock(ip, XFS_ILOCK_EXCL); | |
2492 | + align = xfs_get_extsz_hint(ip); | |
2493 | + if (align == 0) | |
2494 | + align = 1; | |
2495 | + | |
2496 | + align <<= mp->m_sb.sb_blocklog; | |
2497 | + | |
2498 | + if ((off + len) > realsize) { | |
2499 | + xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2500 | + error = -E2BIG; | |
2501 | + goto up_and_out; | |
2502 | + } | |
2503 | + | |
2504 | + if ((off + len) == realsize) | |
2505 | + len = 0; | |
2506 | + | |
2507 | + error = xfs_dm_round_hole(off, len, align, realsize, &roff, &rlen); | |
2508 | + if (error || (off != roff) || (len != rlen)) { | |
2509 | + xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2510 | + error = -EINVAL; | |
2511 | + goto up_and_out; | |
2512 | + } | |
2513 | + | |
2514 | + bf.l_type = 0; | |
2515 | + bf.l_whence = 0; | |
2516 | + bf.l_start = (xfs_off_t)off; | |
2517 | + if (len) { | |
2518 | + bf.l_len = len; | |
2519 | + } | |
2520 | + else { | |
2521 | + /* | |
2522 | + * When we are punching to EOF, we have to make sure we punch | |
2523 | + * the last partial block that contains EOF. Round up | |
2524 | + * the length to make sure we punch the block and not just | |
2525 | + * zero it. | |
2526 | + */ | |
2527 | + bf.l_len = roundup_64((realsize - off), mp->m_sb.sb_blocksize); | |
2528 | + } | |
2529 | + | |
2530 | +#ifdef CONFIG_DMAPI_DEBUG | |
2531 | + printk("xfs_dm_punch_hole: off %lu, len %ld, align %lu\n", | |
2532 | + off, len, align); | |
2533 | +#endif | |
2534 | + | |
2535 | + error = xfs_change_file_space(ip, XFS_IOC_UNRESVSP, &bf, | |
2536 | + (xfs_off_t)off, sys_cred, | |
2537 | + XFS_ATTR_DMI|XFS_ATTR_NOLOCK); | |
2538 | + | |
2539 | + /* | |
2540 | + * if punching to end of file, kill any blocks past EOF that | |
2541 | + * may have been (speculatively) preallocated. No point in | |
2542 | + * leaving them around if we are migrating the file.... | |
2543 | + */ | |
2544 | + if (!error && (len == 0)) { | |
2545 | + error = xfs_free_eofblocks(mp, ip, XFS_FREE_EOF_NOLOCK); | |
2546 | + } | |
2547 | + | |
2548 | + /* | |
2549 | + * negate the error for return here as core XFS functions return | |
2550 | + * positive error numbers | |
2551 | + */ | |
2552 | + if (error) | |
2553 | + error = -error; | |
2554 | + | |
2555 | + /* Let threads in send_data_event know we punched the file. */ | |
2556 | + ip->i_d.di_dmstate++; | |
2557 | + xfs_iunlock(ip, XFS_IOLOCK_EXCL); | |
2558 | + xfs_iflags_set(ip, XFS_IMODIFIED); | |
2559 | + | |
2560 | +up_and_out: | |
2561 | + up_rw_sems(inode, DM_SEM_FLAG_WR); | |
2562 | + put_write_access(inode); | |
2563 | + | |
2564 | + return error; | |
2565 | +} | |
2566 | + | |
2567 | + | |
2568 | +STATIC int | |
2569 | +xfs_dm_read_invis_rvp( | |
2570 | + struct inode *inode, | |
2571 | + dm_right_t right, | |
2572 | + dm_off_t off, | |
2573 | + dm_size_t len, | |
2574 | + void __user *bufp, | |
2575 | + int *rvp) | |
2576 | +{ | |
2577 | + /* Returns negative errors to DMAPI */ | |
2578 | + | |
2579 | + if (right < DM_RIGHT_SHARED) | |
2580 | + return(-EACCES); | |
2581 | + | |
2582 | + return(-xfs_dm_rdwr(inode, 0, FMODE_READ, off, len, bufp, rvp)); | |
2583 | +} | |
2584 | + | |
2585 | + | |
2586 | +/* ARGSUSED */ | |
2587 | +STATIC int | |
2588 | +xfs_dm_release_right( | |
2589 | + struct inode *inode, | |
2590 | + dm_right_t right, | |
2591 | + u_int type) /* DM_FSYS_OBJ or zero */ | |
2592 | +{ | |
2593 | +#ifdef DEBUG_RIGHTS | |
2594 | + char buffer[sizeof(dm_handle_t) * 2 + 1]; | |
2595 | + | |
2596 | + if (!xfs_vp_to_hexhandle(inode, type, buffer)) { | |
2597 | + printf("dm_release_right: old %d type %d handle %s\n", | |
2598 | + right, type, buffer); | |
2599 | + } else { | |
2600 | + printf("dm_release_right: old %d type %d handle " | |
2601 | + " <INVALID>\n", right, type); | |
2602 | + } | |
2603 | +#endif /* DEBUG_RIGHTS */ | |
2604 | + return(0); | |
2605 | +} | |
2606 | + | |
2607 | + | |
2608 | +STATIC int | |
2609 | +xfs_dm_remove_dmattr( | |
2610 | + struct inode *inode, | |
2611 | + dm_right_t right, | |
2612 | + int setdtime, | |
2613 | + dm_attrname_t __user *attrnamep) | |
2614 | +{ | |
2615 | + dm_dkattrname_t name; | |
2616 | + int error; | |
2617 | + | |
2618 | + /* Returns negative errors to DMAPI */ | |
2619 | + | |
2620 | + if (right < DM_RIGHT_EXCL) | |
2621 | + return(-EACCES); | |
2622 | + | |
2623 | + if ((error = xfs_copyin_attrname(attrnamep, &name)) != 0) | |
2624 | + return(-error); /* Return negative error to DMAPI */ | |
2625 | + | |
2626 | + /* Remove the attribute from the object. */ | |
2627 | + | |
2628 | + error = xfs_attr_remove(XFS_I(inode), name.dan_chars, setdtime ? | |
2629 | + ATTR_ROOT : (ATTR_ROOT|ATTR_KERNOTIME)); | |
2630 | + DM_EA_XLATE_ERR(error); | |
2631 | + | |
2632 | + if (error == ENOATTR) | |
2633 | + error = ENOENT; | |
2634 | + return(-error); /* Return negative error to DMAPI */ | |
2635 | +} | |
2636 | + | |
2637 | + | |
2638 | +/* ARGSUSED */ | |
2639 | +STATIC int | |
2640 | +xfs_dm_request_right( | |
2641 | + struct inode *inode, | |
2642 | + dm_right_t right, | |
2643 | + u_int type, /* DM_FSYS_OBJ or zero */ | |
2644 | + u_int flags, | |
2645 | + dm_right_t newright) | |
2646 | +{ | |
2647 | +#ifdef DEBUG_RIGHTS | |
2648 | + char buffer[sizeof(dm_handle_t) * 2 + 1]; | |
2649 | + | |
2650 | + if (!xfs_vp_to_hexhandle(inode, type, buffer)) { | |
2651 | + printf("dm_request_right: old %d new %d type %d flags 0x%x " | |
2652 | + "handle %s\n", right, newright, type, flags, buffer); | |
2653 | + } else { | |
2654 | + printf("dm_request_right: old %d new %d type %d flags 0x%x " | |
2655 | + "handle <INVALID>\n", right, newright, type, flags); | |
2656 | + } | |
2657 | +#endif /* DEBUG_RIGHTS */ | |
2658 | + return(0); | |
2659 | +} | |
2660 | + | |
2661 | + | |
2662 | +STATIC int | |
2663 | +xfs_dm_set_dmattr( | |
2664 | + struct inode *inode, | |
2665 | + dm_right_t right, | |
2666 | + dm_attrname_t __user *attrnamep, | |
2667 | + int setdtime, | |
2668 | + size_t buflen, | |
2669 | + void __user *bufp) | |
2670 | +{ | |
2671 | + dm_dkattrname_t name; | |
2672 | + char *value; | |
2673 | + int alloc_size; | |
2674 | + int error; | |
2675 | + | |
2676 | + /* Returns negative errors to DMAPI */ | |
2677 | + | |
2678 | + if (right < DM_RIGHT_EXCL) | |
2679 | + return(-EACCES); | |
2680 | + | |
2681 | + if ((error = xfs_copyin_attrname(attrnamep, &name)) != 0) | |
2682 | + return(-error); /* Return negative error to DMAPI */ | |
2683 | + if (buflen > ATTR_MAX_VALUELEN) | |
2684 | + return(-E2BIG); | |
2685 | + | |
2686 | + /* Copy in the attribute's value and store the <name,value> pair in | |
2687 | + the object. We allocate a buffer of at least one byte even if the | |
2688 | + caller specified a buflen of zero. (A buflen of zero is considered | |
2689 | + valid.) | |
2690 | + */ | |
2691 | + | |
2692 | + alloc_size = (buflen == 0) ? 1 : buflen; | |
2693 | + value = kmem_alloc(alloc_size, KM_SLEEP); | |
2694 | + if (copy_from_user( value, bufp, buflen)) { | |
2695 | + error = EFAULT; | |
2696 | + } else { | |
2697 | + error = xfs_attr_set(XFS_I(inode), name.dan_chars, value, buflen, | |
2698 | + setdtime ? ATTR_ROOT : | |
2699 | + (ATTR_ROOT|ATTR_KERNOTIME)); | |
2700 | + DM_EA_XLATE_ERR(error); | |
2701 | + } | |
2702 | + kmem_free(value); | |
2703 | + return(-error); /* Return negative error to DMAPI */ | |
2704 | +} | |
2705 | + | |
2706 | +STATIC int | |
2707 | +xfs_dm_set_eventlist( | |
2708 | + struct inode *inode, | |
2709 | + dm_right_t right, | |
2710 | + u_int type, | |
2711 | + dm_eventset_t *eventsetp, /* in kernel space! */ | |
2712 | + u_int maxevent) | |
2713 | +{ | |
2714 | + int error; | |
2715 | + xfs_inode_t *ip = XFS_I(inode); | |
2716 | + | |
2717 | + /* Returns negative errors to DMAPI */ | |
2718 | + | |
2719 | + if (type == DM_FSYS_OBJ) { | |
2720 | + error = xfs_dm_fs_set_eventlist(ip->i_mount, right, eventsetp, maxevent); | |
2721 | + } else { | |
2722 | + error = xfs_dm_f_set_eventlist(ip, right, eventsetp, maxevent); | |
2723 | + } | |
2724 | + return(-error); /* Return negative error to DMAPI */ | |
2725 | +} | |
2726 | + | |
2727 | + | |
2728 | +/* | |
2729 | + * This turned out not XFS-specific, but leave it here with get_fileattr. | |
2730 | + */ | |
2731 | + | |
2732 | +STATIC int | |
2733 | +xfs_dm_set_fileattr( | |
2734 | + struct inode *inode, | |
2735 | + dm_right_t right, | |
2736 | + u_int mask, | |
2737 | + dm_fileattr_t __user *statp) | |
2738 | +{ | |
2739 | + dm_fileattr_t stat; | |
2740 | + struct iattr iattr; | |
2741 | + | |
2742 | + /* Returns negative errors to DMAPI */ | |
2743 | + | |
2744 | + if (right < DM_RIGHT_EXCL) | |
2745 | + return(-EACCES); | |
2746 | + | |
2747 | + if (copy_from_user( &stat, statp, sizeof(stat))) | |
2748 | + return(-EFAULT); | |
2749 | + | |
2750 | + iattr.ia_valid = 0; | |
2751 | + | |
2752 | + if (mask & DM_AT_MODE) { | |
2753 | + iattr.ia_valid |= ATTR_MODE; | |
2754 | + iattr.ia_mode = stat.fa_mode; | |
2755 | + } | |
2756 | + if (mask & DM_AT_UID) { | |
2757 | + iattr.ia_valid |= ATTR_UID; | |
2758 | + iattr.ia_uid = stat.fa_uid; | |
2759 | + } | |
2760 | + if (mask & DM_AT_GID) { | |
2761 | + iattr.ia_valid |= ATTR_GID; | |
2762 | + iattr.ia_gid = stat.fa_gid; | |
2763 | + } | |
2764 | + if (mask & DM_AT_ATIME) { | |
2765 | + iattr.ia_valid |= ATTR_ATIME; | |
2766 | + iattr.ia_atime.tv_sec = stat.fa_atime; | |
2767 | + iattr.ia_atime.tv_nsec = 0; | |
2768 | + inode->i_atime.tv_sec = stat.fa_atime; | |
2769 | + } | |
2770 | + if (mask & DM_AT_MTIME) { | |
2771 | + iattr.ia_valid |= ATTR_MTIME; | |
2772 | + iattr.ia_mtime.tv_sec = stat.fa_mtime; | |
2773 | + iattr.ia_mtime.tv_nsec = 0; | |
2774 | + } | |
2775 | + if (mask & DM_AT_CTIME) { | |
2776 | + iattr.ia_valid |= ATTR_CTIME; | |
2777 | + iattr.ia_ctime.tv_sec = stat.fa_ctime; | |
2778 | + iattr.ia_ctime.tv_nsec = 0; | |
2779 | + } | |
2780 | + | |
2781 | + /* | |
2782 | + * DM_AT_DTIME only takes effect if DM_AT_CTIME is not specified. We | |
2783 | + * overload ctime to also act as dtime, i.e. DM_CONFIG_DTIME_OVERLOAD. | |
2784 | + */ | |
2785 | + if ((mask & DM_AT_DTIME) && !(mask & DM_AT_CTIME)) { | |
2786 | + iattr.ia_valid |= ATTR_CTIME; | |
2787 | + iattr.ia_ctime.tv_sec = stat.fa_dtime; | |
2788 | + iattr.ia_ctime.tv_nsec = 0; | |
2789 | + } | |
2790 | + if (mask & DM_AT_SIZE) { | |
2791 | + iattr.ia_valid |= ATTR_SIZE; | |
2792 | + iattr.ia_size = stat.fa_size; | |
2793 | + } | |
2794 | + | |
2795 | + return -xfs_setattr(XFS_I(inode), &iattr, XFS_ATTR_DMI, NULL); | |
2796 | +} | |
2797 | + | |
2798 | + | |
2799 | +/* ARGSUSED */ | |
2800 | +STATIC int | |
2801 | +xfs_dm_set_inherit( | |
2802 | + struct inode *inode, | |
2803 | + dm_right_t right, | |
2804 | + dm_attrname_t __user *attrnamep, | |
2805 | + mode_t mode) | |
2806 | +{ | |
2807 | + return(-ENOSYS); /* Return negative error to DMAPI */ | |
2808 | +} | |
2809 | + | |
2810 | + | |
2811 | +STATIC int | |
2812 | +xfs_dm_set_region( | |
2813 | + struct inode *inode, | |
2814 | + dm_right_t right, | |
2815 | + u_int nelem, | |
2816 | + dm_region_t __user *regbufp, | |
2817 | + dm_boolean_t __user *exactflagp) | |
2818 | +{ | |
2819 | + xfs_inode_t *ip = XFS_I(inode); | |
2820 | + xfs_trans_t *tp; | |
2821 | + xfs_mount_t *mp; | |
2822 | + dm_region_t region; | |
2823 | + dm_eventset_t new_mask; | |
2824 | + dm_eventset_t mr_mask; | |
2825 | + int error; | |
2826 | + u_int exactflag; | |
2827 | + | |
2828 | + /* Returns negative errors to DMAPI */ | |
2829 | + | |
2830 | + if (right < DM_RIGHT_EXCL) | |
2831 | + return(-EACCES); | |
2832 | + | |
2833 | + /* If the caller gave us more than one dm_region_t structure, complain. | |
2834 | + (He has to call dm_get_config() to find out what our limit is.) | |
2835 | + */ | |
2836 | + | |
2837 | + if (nelem > 1) | |
2838 | + return(-E2BIG); | |
2839 | + | |
2840 | + /* If the user provided a dm_region_t structure, then copy it in, | |
2841 | + validate it, and convert its flags to the corresponding bits in a | |
2842 | + dm_set_eventlist() event mask. A call with zero regions is | |
2843 | + equivalent to clearing all region flags. | |
2844 | + */ | |
2845 | + | |
2846 | + new_mask = 0; | |
2847 | + if (nelem == 1) { | |
2848 | + if (copy_from_user( ®ion, regbufp, sizeof(region))) | |
2849 | + return(-EFAULT); | |
2850 | + | |
2851 | + if (region.rg_flags & ~(DM_REGION_READ|DM_REGION_WRITE|DM_REGION_TRUNCATE)) | |
2852 | + return(-EINVAL); | |
2853 | + if (region.rg_flags & DM_REGION_READ) | |
2854 | + new_mask |= 1 << DM_EVENT_READ; | |
2855 | + if (region.rg_flags & DM_REGION_WRITE) | |
2856 | + new_mask |= 1 << DM_EVENT_WRITE; | |
2857 | + if (region.rg_flags & DM_REGION_TRUNCATE) | |
2858 | + new_mask |= 1 << DM_EVENT_TRUNCATE; | |
2859 | + } | |
2860 | + mr_mask = (1 << DM_EVENT_READ) | (1 << DM_EVENT_WRITE) | (1 << DM_EVENT_TRUNCATE); | |
2861 | + | |
2862 | + /* Get the file's existing event mask, clear the old managed region | |
2863 | + bits, add in the new ones, and update the file's mask. | |
2864 | + */ | |
2865 | + | |
2866 | + if (new_mask & prohibited_mr_events(inode->i_mapping)) { | |
2867 | + /* If the change is simply to remove the READ | |
2868 | + * bit, then that's always okay. Otherwise, it's busy. | |
2869 | + */ | |
2870 | + dm_eventset_t m1; | |
2871 | + m1 = ip->i_d.di_dmevmask & ((1 << DM_EVENT_WRITE) | (1 << DM_EVENT_TRUNCATE)); | |
2872 | + if (m1 != new_mask) { | |
2873 | + return -EBUSY; | |
2874 | + } | |
2875 | + } | |
2876 | + | |
2877 | + mp = ip->i_mount; | |
2878 | + tp = xfs_trans_alloc(mp, XFS_TRANS_SET_DMATTRS); | |
2879 | + error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES (mp), 0, 0, 0); | |
2880 | + if (error) { | |
2881 | + xfs_trans_cancel(tp, 0); | |
2882 | + return(-error); /* Return negative error to DMAPI */ | |
2883 | + } | |
2884 | + xfs_ilock(ip, XFS_ILOCK_EXCL); | |
2885 | + xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); | |
2886 | + | |
2887 | + ip->i_d.di_dmevmask = (ip->i_d.di_dmevmask & ~mr_mask) | new_mask; | |
2888 | + | |
2889 | + xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); | |
2890 | + igrab(inode); | |
2891 | + xfs_trans_commit(tp, 0); | |
2892 | + | |
2893 | + /* Return the proper value for *exactflagp depending upon whether or not | |
2894 | + we "changed" the user's managed region. In other words, if the user | |
2895 | + specified a non-zero value for either rg_offset or rg_size, we | |
2896 | + round each of those values back to zero. | |
2897 | + */ | |
2898 | + | |
2899 | + if (nelem && (region.rg_offset || region.rg_size)) { | |
2900 | + exactflag = DM_FALSE; /* user region was changed */ | |
2901 | + } else { | |
2902 | + exactflag = DM_TRUE; /* user region was unchanged */ | |
2903 | + } | |
2904 | + if (copy_to_user( exactflagp, &exactflag, sizeof(exactflag))) | |
2905 | + return(-EFAULT); | |
2906 | + return(0); | |
2907 | +} | |
2908 | + | |
2909 | + | |
2910 | +/* ARGSUSED */ | |
2911 | +STATIC int | |
2912 | +xfs_dm_symlink_by_handle( | |
2913 | + struct inode *inode, | |
2914 | + dm_right_t right, | |
2915 | + void __user *hanp, | |
2916 | + size_t hlen, | |
2917 | + char __user *cname, | |
2918 | + char __user *path) | |
2919 | +{ | |
2920 | + return(-ENOSYS); /* Return negative errors to DMAPI */ | |
2921 | +} | |
2922 | + | |
2923 | + | |
2924 | +/* | |
2925 | + * xfs_dm_sync_by_handle needs to do the same thing as sys_fsync() | |
2926 | + */ | |
2927 | +STATIC int | |
2928 | +xfs_dm_sync_by_handle( | |
2929 | + struct inode *inode, | |
2930 | + dm_right_t right) | |
2931 | +{ | |
2932 | + int err, ret; | |
2933 | + xfs_inode_t *ip = XFS_I(inode); | |
2934 | + | |
2935 | + /* Returns negative errors to DMAPI */ | |
2936 | + if (right < DM_RIGHT_EXCL) | |
2937 | + return(-EACCES); | |
2938 | + | |
2939 | + /* We need to protect against concurrent writers.. */ | |
2940 | + ret = filemap_fdatawrite(inode->i_mapping); | |
2941 | + down_rw_sems(inode, DM_FLAGS_IMUX); | |
2942 | + err = -xfs_fsync(ip); | |
2943 | + if (!ret) | |
2944 | + ret = err; | |
2945 | + up_rw_sems(inode, DM_FLAGS_IMUX); | |
2946 | + err = filemap_fdatawait(inode->i_mapping); | |
2947 | + if (!ret) | |
2948 | + ret = err; | |
2949 | + xfs_iflags_clear(ip, XFS_ITRUNCATED); | |
2950 | + return ret; | |
2951 | +} | |
2952 | + | |
2953 | + | |
2954 | +/* ARGSUSED */ | |
2955 | +STATIC int | |
2956 | +xfs_dm_upgrade_right( | |
2957 | + struct inode *inode, | |
2958 | + dm_right_t right, | |
2959 | + u_int type) /* DM_FSYS_OBJ or zero */ | |
2960 | +{ | |
2961 | +#ifdef DEBUG_RIGHTS | |
2962 | + char buffer[sizeof(dm_handle_t) * 2 + 1]; | |
2963 | + | |
2964 | + if (!xfs_vp_to_hexhandle(inode, type, buffer)) { | |
2965 | + printf("dm_upgrade_right: old %d new %d type %d handle %s\n", | |
2966 | + right, DM_RIGHT_EXCL, type, buffer); | |
2967 | + } else { | |
2968 | + printf("dm_upgrade_right: old %d new %d type %d handle " | |
2969 | + "<INVALID>\n", right, DM_RIGHT_EXCL, type); | |
2970 | + } | |
2971 | +#endif /* DEBUG_RIGHTS */ | |
2972 | + return(0); | |
2973 | +} | |
2974 | + | |
2975 | + | |
2976 | +STATIC int | |
2977 | +xfs_dm_write_invis_rvp( | |
2978 | + struct inode *inode, | |
2979 | + dm_right_t right, | |
2980 | + int flags, | |
2981 | + dm_off_t off, | |
2982 | + dm_size_t len, | |
2983 | + void __user *bufp, | |
2984 | + int *rvp) | |
2985 | +{ | |
2986 | + int fflag = 0; | |
2987 | + | |
2988 | + /* Returns negative errors to DMAPI */ | |
2989 | + | |
2990 | + if (right < DM_RIGHT_EXCL) | |
2991 | + return(-EACCES); | |
2992 | + | |
2993 | + if (flags & DM_WRITE_SYNC) | |
2994 | + fflag |= O_SYNC; | |
2995 | + return(-xfs_dm_rdwr(inode, fflag, FMODE_WRITE, off, len, bufp, rvp)); | |
2996 | +} | |
2997 | + | |
2998 | + | |
2999 | +STATIC void | |
3000 | +xfs_dm_obj_ref_hold( | |
3001 | + struct inode *inode) | |
3002 | +{ | |
3003 | + igrab(inode); | |
3004 | +} | |
3005 | + | |
3006 | + | |
3007 | +static fsys_function_vector_t xfs_fsys_vector[DM_FSYS_MAX]; | |
3008 | + | |
3009 | + | |
3010 | +STATIC int | |
3011 | +xfs_dm_get_dmapiops( | |
3012 | + struct super_block *sb, | |
3013 | + void *addr) | |
3014 | +{ | |
3015 | + static int initialized = 0; | |
3016 | + dm_fcntl_vector_t *vecrq; | |
3017 | + fsys_function_vector_t *vecp; | |
3018 | + int i = 0; | |
3019 | + | |
3020 | + vecrq = (dm_fcntl_vector_t *)addr; | |
3021 | + vecrq->count = | |
3022 | + sizeof(xfs_fsys_vector) / sizeof(xfs_fsys_vector[0]); | |
3023 | + vecrq->vecp = xfs_fsys_vector; | |
3024 | + if (initialized) | |
3025 | + return(0); | |
3026 | + vecrq->code_level = DM_CLVL_XOPEN; | |
3027 | + vecp = xfs_fsys_vector; | |
3028 | + | |
3029 | + vecp[i].func_no = DM_FSYS_CLEAR_INHERIT; | |
3030 | + vecp[i++].u_fc.clear_inherit = xfs_dm_clear_inherit; | |
3031 | + vecp[i].func_no = DM_FSYS_CREATE_BY_HANDLE; | |
3032 | + vecp[i++].u_fc.create_by_handle = xfs_dm_create_by_handle; | |
3033 | + vecp[i].func_no = DM_FSYS_DOWNGRADE_RIGHT; | |
3034 | + vecp[i++].u_fc.downgrade_right = xfs_dm_downgrade_right; | |
3035 | + vecp[i].func_no = DM_FSYS_GET_ALLOCINFO_RVP; | |
3036 | + vecp[i++].u_fc.get_allocinfo_rvp = xfs_dm_get_allocinfo_rvp; | |
3037 | + vecp[i].func_no = DM_FSYS_GET_BULKALL_RVP; | |
3038 | + vecp[i++].u_fc.get_bulkall_rvp = xfs_dm_get_bulkall_rvp; | |
3039 | + vecp[i].func_no = DM_FSYS_GET_BULKATTR_RVP; | |
3040 | + vecp[i++].u_fc.get_bulkattr_rvp = xfs_dm_get_bulkattr_rvp; | |
3041 | + vecp[i].func_no = DM_FSYS_GET_CONFIG; | |
3042 | + vecp[i++].u_fc.get_config = xfs_dm_get_config; | |
3043 | + vecp[i].func_no = DM_FSYS_GET_CONFIG_EVENTS; | |
3044 | + vecp[i++].u_fc.get_config_events = xfs_dm_get_config_events; | |
3045 | + vecp[i].func_no = DM_FSYS_GET_DESTROY_DMATTR; | |
3046 | + vecp[i++].u_fc.get_destroy_dmattr = xfs_dm_get_destroy_dmattr; | |
3047 | + vecp[i].func_no = DM_FSYS_GET_DIOINFO; | |
3048 | + vecp[i++].u_fc.get_dioinfo = xfs_dm_get_dioinfo; | |
3049 | + vecp[i].func_no = DM_FSYS_GET_DIRATTRS_RVP; | |
3050 | + vecp[i++].u_fc.get_dirattrs_rvp = xfs_dm_get_dirattrs_rvp; | |
3051 | + vecp[i].func_no = DM_FSYS_GET_DMATTR; | |
3052 | + vecp[i++].u_fc.get_dmattr = xfs_dm_get_dmattr; | |
3053 | + vecp[i].func_no = DM_FSYS_GET_EVENTLIST; | |
3054 | + vecp[i++].u_fc.get_eventlist = xfs_dm_get_eventlist; | |
3055 | + vecp[i].func_no = DM_FSYS_GET_FILEATTR; | |
3056 | + vecp[i++].u_fc.get_fileattr = xfs_dm_get_fileattr; | |
3057 | + vecp[i].func_no = DM_FSYS_GET_REGION; | |
3058 | + vecp[i++].u_fc.get_region = xfs_dm_get_region; | |
3059 | + vecp[i].func_no = DM_FSYS_GETALL_DMATTR; | |
3060 | + vecp[i++].u_fc.getall_dmattr = xfs_dm_getall_dmattr; | |
3061 | + vecp[i].func_no = DM_FSYS_GETALL_INHERIT; | |
3062 | + vecp[i++].u_fc.getall_inherit = xfs_dm_getall_inherit; | |
3063 | + vecp[i].func_no = DM_FSYS_INIT_ATTRLOC; | |
3064 | + vecp[i++].u_fc.init_attrloc = xfs_dm_init_attrloc; | |
3065 | + vecp[i].func_no = DM_FSYS_MKDIR_BY_HANDLE; | |
3066 | + vecp[i++].u_fc.mkdir_by_handle = xfs_dm_mkdir_by_handle; | |
3067 | + vecp[i].func_no = DM_FSYS_PROBE_HOLE; | |
3068 | + vecp[i++].u_fc.probe_hole = xfs_dm_probe_hole; | |
3069 | + vecp[i].func_no = DM_FSYS_PUNCH_HOLE; | |
3070 | + vecp[i++].u_fc.punch_hole = xfs_dm_punch_hole; | |
3071 | + vecp[i].func_no = DM_FSYS_READ_INVIS_RVP; | |
3072 | + vecp[i++].u_fc.read_invis_rvp = xfs_dm_read_invis_rvp; | |
3073 | + vecp[i].func_no = DM_FSYS_RELEASE_RIGHT; | |
3074 | + vecp[i++].u_fc.release_right = xfs_dm_release_right; | |
3075 | + vecp[i].func_no = DM_FSYS_REMOVE_DMATTR; | |
3076 | + vecp[i++].u_fc.remove_dmattr = xfs_dm_remove_dmattr; | |
3077 | + vecp[i].func_no = DM_FSYS_REQUEST_RIGHT; | |
3078 | + vecp[i++].u_fc.request_right = xfs_dm_request_right; | |
3079 | + vecp[i].func_no = DM_FSYS_SET_DMATTR; | |
3080 | + vecp[i++].u_fc.set_dmattr = xfs_dm_set_dmattr; | |
3081 | + vecp[i].func_no = DM_FSYS_SET_EVENTLIST; | |
3082 | + vecp[i++].u_fc.set_eventlist = xfs_dm_set_eventlist; | |
3083 | + vecp[i].func_no = DM_FSYS_SET_FILEATTR; | |
3084 | + vecp[i++].u_fc.set_fileattr = xfs_dm_set_fileattr; | |
3085 | + vecp[i].func_no = DM_FSYS_SET_INHERIT; | |
3086 | + vecp[i++].u_fc.set_inherit = xfs_dm_set_inherit; | |
3087 | + vecp[i].func_no = DM_FSYS_SET_REGION; | |
3088 | + vecp[i++].u_fc.set_region = xfs_dm_set_region; | |
3089 | + vecp[i].func_no = DM_FSYS_SYMLINK_BY_HANDLE; | |
3090 | + vecp[i++].u_fc.symlink_by_handle = xfs_dm_symlink_by_handle; | |
3091 | + vecp[i].func_no = DM_FSYS_SYNC_BY_HANDLE; | |
3092 | + vecp[i++].u_fc.sync_by_handle = xfs_dm_sync_by_handle; | |
3093 | + vecp[i].func_no = DM_FSYS_UPGRADE_RIGHT; | |
3094 | + vecp[i++].u_fc.upgrade_right = xfs_dm_upgrade_right; | |
3095 | + vecp[i].func_no = DM_FSYS_WRITE_INVIS_RVP; | |
3096 | + vecp[i++].u_fc.write_invis_rvp = xfs_dm_write_invis_rvp; | |
3097 | + vecp[i].func_no = DM_FSYS_OBJ_REF_HOLD; | |
3098 | + vecp[i++].u_fc.obj_ref_hold = xfs_dm_obj_ref_hold; | |
3099 | + | |
3100 | + return(0); | |
3101 | +} | |
3102 | + | |
3103 | + | |
3104 | +/* xfs_dm_send_mmap_event - send events needed for memory mapping a file. | |
3105 | + * | |
3106 | + * This is a workaround called for files that are about to be | |
3107 | + * mapped. DMAPI events are not being generated at a low enough level | |
3108 | + * in the kernel for page reads/writes to generate the correct events. | |
3109 | + * So for memory-mapped files we generate read or write events for the | |
3110 | + * whole byte range being mapped. If the mmap call can never cause a | |
3111 | + * write to the file, then only a read event is sent. | |
3112 | + * | |
3113 | + * Code elsewhere prevents adding managed regions to a file while it | |
3114 | + * is still mapped. | |
3115 | + */ | |
3116 | + | |
3117 | +STATIC int | |
3118 | +xfs_dm_send_mmap_event( | |
3119 | + struct vm_area_struct *vma, | |
3120 | + unsigned int wantflag) | |
3121 | +{ | |
3122 | + xfs_inode_t *ip; | |
3123 | + int error = 0; | |
3124 | + dm_eventtype_t max_event = DM_EVENT_READ; | |
3125 | + xfs_fsize_t filesize; | |
3126 | + xfs_off_t length, end_of_area, evsize, offset; | |
3127 | + int iolock; | |
3128 | + | |
3129 | + if (!vma->vm_file) | |
3130 | + return 0; | |
3131 | + | |
3132 | + ip = XFS_I(vma->vm_file->f_dentry->d_inode); | |
3133 | + | |
3134 | + if (!S_ISREG(vma->vm_file->f_dentry->d_inode->i_mode) || | |
3135 | + !(ip->i_mount->m_flags & XFS_MOUNT_DMAPI)) | |
3136 | + return 0; | |
3137 | + | |
3138 | + /* If they specifically asked for 'read', then give it to them. | |
3139 | + * Otherwise, see if it's possible to give them 'write'. | |
3140 | + */ | |
3141 | + if( wantflag & VM_READ ){ | |
3142 | + max_event = DM_EVENT_READ; | |
3143 | + } | |
3144 | + else if( ! (vma->vm_flags & VM_DENYWRITE) ) { | |
3145 | + if((wantflag & VM_WRITE) || (vma->vm_flags & VM_WRITE)) | |
3146 | + max_event = DM_EVENT_WRITE; | |
3147 | + } | |
3148 | + | |
3149 | + if( (wantflag & VM_WRITE) && (max_event != DM_EVENT_WRITE) ){ | |
3150 | + return -EACCES; | |
3151 | + } | |
3152 | + | |
3153 | + /* Figure out how much of the file is being requested by the user. */ | |
3154 | + offset = 0; /* beginning of file, for now */ | |
3155 | + length = 0; /* whole file, for now */ | |
3156 | + | |
3157 | + filesize = ip->i_new_size; | |
3158 | + if (filesize < ip->i_size) { | |
3159 | + filesize = ip->i_size; | |
3160 | + } | |
3161 | + | |
3162 | + /* Set first byte number beyond the map area. */ | |
3163 | + | |
3164 | + if (length) { | |
3165 | + end_of_area = offset + length; | |
3166 | + if (end_of_area > filesize) | |
3167 | + end_of_area = filesize; | |
3168 | + } else { | |
3169 | + end_of_area = filesize; | |
3170 | + } | |
3171 | + | |
3172 | + /* Set the real amount being mapped. */ | |
3173 | + evsize = end_of_area - offset; | |
3174 | + if (evsize < 0) | |
3175 | + evsize = 0; | |
3176 | + | |
3177 | + if (max_event == DM_EVENT_READ) | |
3178 | + iolock = XFS_IOLOCK_SHARED; | |
3179 | + else | |
3180 | + iolock = XFS_IOLOCK_EXCL; | |
3181 | + | |
3182 | + xfs_ilock(ip, iolock); | |
3183 | + /* If write possible, try a DMAPI write event */ | |
3184 | + if (max_event == DM_EVENT_WRITE && DM_EVENT_ENABLED(ip, max_event)) { | |
3185 | + error = xfs_dm_send_data_event(max_event, ip, offset, | |
3186 | + evsize, 0, &iolock); | |
3187 | + goto out_unlock; | |
3188 | + } | |
3189 | + | |
3190 | + /* Try a read event if max_event was != DM_EVENT_WRITE or if it | |
3191 | + * was DM_EVENT_WRITE but the WRITE event was not enabled. | |
3192 | + */ | |
3193 | + if (DM_EVENT_ENABLED(ip, DM_EVENT_READ)) { | |
3194 | + error = xfs_dm_send_data_event(DM_EVENT_READ, ip, offset, | |
3195 | + evsize, 0, &iolock); | |
3196 | + } | |
3197 | +out_unlock: | |
3198 | + xfs_iunlock(ip, iolock); | |
3199 | + return -error; | |
3200 | +} | |
3201 | + | |
3202 | + | |
3203 | +STATIC int | |
3204 | +xfs_dm_send_destroy_event( | |
3205 | + xfs_inode_t *ip, | |
3206 | + dm_right_t vp_right) /* always DM_RIGHT_NULL */ | |
3207 | +{ | |
3208 | + /* Returns positive errors to XFS */ | |
3209 | + return -dm_send_destroy_event(ip->i_vnode, vp_right); | |
3210 | +} | |
3211 | + | |
3212 | + | |
3213 | +STATIC int | |
3214 | +xfs_dm_send_namesp_event( | |
3215 | + dm_eventtype_t event, | |
3216 | + struct xfs_mount *mp, | |
3217 | + xfs_inode_t *ip1, | |
3218 | + dm_right_t vp1_right, | |
3219 | + xfs_inode_t *ip2, | |
3220 | + dm_right_t vp2_right, | |
3221 | + const char *name1, | |
3222 | + const char *name2, | |
3223 | + mode_t mode, | |
3224 | + int retcode, | |
3225 | + int flags) | |
3226 | +{ | |
3227 | + /* Returns positive errors to XFS */ | |
3228 | + return -dm_send_namesp_event(event, mp ? mp->m_super : NULL, | |
3229 | + ip1->i_vnode, vp1_right, | |
3230 | + ip2 ? ip2->i_vnode : NULL, vp2_right, | |
3231 | + name1, name2, | |
3232 | + mode, retcode, flags); | |
3233 | +} | |
3234 | + | |
3235 | +STATIC int | |
3236 | +xfs_dm_send_mount_event( | |
3237 | + struct xfs_mount *mp, | |
3238 | + dm_right_t root_right, | |
3239 | + char *mtpt, | |
3240 | + char *fsname) | |
3241 | +{ | |
3242 | + return dm_send_mount_event(mp->m_super, root_right, | |
3243 | + NULL, DM_RIGHT_NULL, | |
3244 | + mp->m_rootip ? VFS_I(mp->m_rootip) : NULL, | |
3245 | + DM_RIGHT_NULL, mtpt, fsname); | |
3246 | +} | |
3247 | + | |
3248 | +STATIC void | |
3249 | +xfs_dm_send_unmount_event( | |
3250 | + struct xfs_mount *mp, | |
3251 | + xfs_inode_t *ip, /* NULL if unmount successful */ | |
3252 | + dm_right_t vfsp_right, | |
3253 | + mode_t mode, | |
3254 | + int retcode, /* errno, if unmount failed */ | |
3255 | + int flags) | |
3256 | +{ | |
3257 | + dm_send_unmount_event(mp->m_super, ip ? ip->i_vnode : NULL, | |
3258 | + vfsp_right, mode, retcode, flags); | |
3259 | +} | |
3260 | + | |
3261 | + | |
3262 | +/* | |
3263 | + * Data migration operations accessed by the rest of XFS. | |
3264 | + * When DMAPI support is configured in, this vector is used. | |
3265 | + */ | |
3266 | + | |
3267 | +xfs_dmops_t xfs_dmcore_xfs = { | |
3268 | + .xfs_send_data = xfs_dm_send_data_event, | |
3269 | + .xfs_send_mmap = xfs_dm_send_mmap_event, | |
3270 | + .xfs_send_destroy = xfs_dm_send_destroy_event, | |
3271 | + .xfs_send_namesp = xfs_dm_send_namesp_event, | |
3272 | + .xfs_send_mount = xfs_dm_send_mount_event, | |
3273 | + .xfs_send_unmount = xfs_dm_send_unmount_event, | |
3274 | +}; | |
3275 | +EXPORT_SYMBOL(xfs_dmcore_xfs); | |
3276 | + | |
3277 | +STATIC const struct file_operations * | |
3278 | +xfs_dm_get_invis_ops( | |
3279 | + struct inode *ip) | |
3280 | +{ | |
3281 | + return &xfs_invis_file_operations; | |
3282 | +} | |
3283 | + | |
3284 | +STATIC int | |
3285 | +xfs_dm_fh_to_inode( | |
3286 | + struct super_block *sb, | |
3287 | + struct inode **inode, | |
3288 | + dm_fid_t *dmfid) | |
3289 | +{ | |
3290 | + xfs_mount_t *mp = XFS_M(sb); | |
3291 | + xfs_inode_t *ip; | |
3292 | + xfs_ino_t ino; | |
3293 | + unsigned int igen; | |
3294 | + int error; | |
3295 | + | |
3296 | + *inode = NULL; | |
3297 | + | |
3298 | + if (!dmfid->dm_fid_len) { | |
3299 | + /* filesystem handle */ | |
3300 | + *inode = igrab(mp->m_rootip->i_vnode); | |
3301 | + if (!*inode) | |
3302 | + return -ENOENT; | |
3303 | + return 0; | |
3304 | + } | |
3305 | + | |
3306 | + if (dmfid->dm_fid_len != sizeof(*dmfid) - sizeof(dmfid->dm_fid_len)) | |
3307 | + return -EINVAL; | |
3308 | + | |
3309 | + ino = dmfid->dm_fid_ino; | |
3310 | + igen = dmfid->dm_fid_gen; | |
3311 | + | |
3312 | + /* fail requests for ino 0 gracefully. */ | |
3313 | + if (ino == 0) | |
3314 | + return -ESTALE; | |
3315 | + | |
3316 | + error = xfs_iget(mp, NULL, ino, 0, XFS_ILOCK_SHARED, &ip, 0); | |
3317 | + if (error) | |
3318 | + return -error; | |
3319 | + if (!ip) | |
3320 | + return -EIO; | |
3321 | + | |
3322 | + if (!ip->i_d.di_mode || ip->i_d.di_gen != igen) { | |
3323 | + xfs_iput_new(ip, XFS_ILOCK_SHARED); | |
3324 | + return -ENOENT; | |
3325 | + } | |
3326 | + | |
3327 | + *inode = ip->i_vnode; | |
3328 | + xfs_iunlock(ip, XFS_ILOCK_SHARED); | |
3329 | + return 0; | |
3330 | +} | |
3331 | + | |
3332 | +STATIC int | |
3333 | +xfs_dm_inode_to_fh( | |
3334 | + struct inode *inode, | |
3335 | + dm_fid_t *dmfid, | |
3336 | + dm_fsid_t *dmfsid) | |
3337 | +{ | |
3338 | + xfs_inode_t *ip = XFS_I(inode); | |
3339 | + | |
3340 | + /* Returns negative errors to DMAPI */ | |
3341 | + | |
3342 | + if (ip->i_mount->m_fixedfsid == NULL) | |
3343 | + return -EINVAL; | |
3344 | + | |
3345 | + dmfid->dm_fid_len = sizeof(dm_fid_t) - sizeof(dmfid->dm_fid_len); | |
3346 | + dmfid->dm_fid_pad = 0; | |
3347 | + /* | |
3348 | + * use memcpy because the inode is a long long and there's no | |
3349 | + * assurance that dmfid->dm_fid_ino is properly aligned. | |
3350 | + */ | |
3351 | + memcpy(&dmfid->dm_fid_ino, &ip->i_ino, sizeof(dmfid->dm_fid_ino)); | |
3352 | + dmfid->dm_fid_gen = ip->i_d.di_gen; | |
3353 | + | |
3354 | + memcpy(dmfsid, ip->i_mount->m_fixedfsid, sizeof(*dmfsid)); | |
3355 | + return 0; | |
3356 | +} | |
3357 | + | |
3358 | +STATIC void | |
3359 | +xfs_dm_get_fsid( | |
3360 | + struct super_block *sb, | |
3361 | + dm_fsid_t *fsid) | |
3362 | +{ | |
3363 | + memcpy(fsid, XFS_M(sb)->m_fixedfsid, sizeof(*fsid)); | |
3364 | +} | |
3365 | + | |
3366 | +/* | |
3367 | + * Filesystem operations accessed by the DMAPI core. | |
3368 | + */ | |
3369 | +static struct filesystem_dmapi_operations xfs_dmapiops = { | |
3370 | + .get_fsys_vector = xfs_dm_get_dmapiops, | |
3371 | + .fh_to_inode = xfs_dm_fh_to_inode, | |
3372 | + .get_invis_ops = xfs_dm_get_invis_ops, | |
3373 | + .inode_to_fh = xfs_dm_inode_to_fh, | |
3374 | + .get_fsid = xfs_dm_get_fsid, | |
3375 | +}; | |
3376 | + | |
3377 | +static int __init | |
3378 | +xfs_dm_init(void) | |
3379 | +{ | |
3380 | + printk(KERN_INFO "SGI XFS Data Management API subsystem\n"); | |
3381 | + | |
3382 | + dmapi_register(&xfs_fs_type, &xfs_dmapiops); | |
3383 | + return 0; | |
3384 | +} | |
3385 | + | |
3386 | +static void __exit | |
3387 | +xfs_dm_exit(void) | |
3388 | +{ | |
3389 | + dmapi_unregister(&xfs_fs_type); | |
3390 | +} | |
3391 | + | |
3392 | +MODULE_AUTHOR("Silicon Graphics, Inc."); | |
3393 | +MODULE_DESCRIPTION("SGI XFS dmapi subsystem"); | |
3394 | +MODULE_LICENSE("GPL"); | |
3395 | + | |
3396 | +module_init(xfs_dm_init); | |
3397 | +module_exit(xfs_dm_exit); | |
3398 | Index: linux-2.6.27/fs/xfs/dmapi/xfs_dm.h | |
3399 | =================================================================== | |
3400 | --- /dev/null | |
3401 | +++ linux-2.6.27/fs/xfs/dmapi/xfs_dm.h | |
3402 | @@ -0,0 +1,23 @@ | |
3403 | +/* | |
3404 | + * Copyright (c) 2006 Silicon Graphics, Inc. | |
3405 | + * All Rights Reserved. | |
3406 | + * | |
3407 | + * This program is free software; you can redistribute it and/or | |
3408 | + * modify it under the terms of the GNU General Public License as | |
3409 | + * published by the Free Software Foundation. | |
3410 | + * | |
3411 | + * This program is distributed in the hope that it would be useful, | |
3412 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
3413 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
3414 | + * GNU General Public License for more details. | |
3415 | + * | |
3416 | + * You should have received a copy of the GNU General Public License | |
3417 | + * along with this program; if not, write the Free Software Foundation, | |
3418 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
3419 | + */ | |
3420 | +#ifndef __XFS_DM_H__ | |
3421 | +#define __XFS_DM_H__ | |
3422 | + | |
3423 | +extern struct file_system_type xfs_fs_type; | |
3424 | + | |
3425 | +#endif /* __XFS_DM_H__ */ | |
3426 | Index: linux-2.6.27/fs/xfs/Makefile | |
3427 | =================================================================== | |
3428 | --- linux-2.6.27.orig/fs/xfs/Makefile | |
3429 | +++ linux-2.6.27/fs/xfs/Makefile | |
3430 | @@ -38,6 +38,8 @@ ifeq ($(CONFIG_XFS_QUOTA),y) | |
3431 | xfs-$(CONFIG_PROC_FS) += quota/xfs_qm_stats.o | |
3432 | endif | |
3433 | ||
3434 | +obj-$(CONFIG_XFS_DMAPI) += dmapi/ | |
3435 | + | |
3436 | xfs-$(CONFIG_XFS_RT) += xfs_rtalloc.o | |
3437 | xfs-$(CONFIG_XFS_POSIX_ACL) += xfs_acl.o | |
3438 | xfs-$(CONFIG_PROC_FS) += $(XFS_LINUX)/xfs_stats.o | |
3439 | @@ -107,7 +109,8 @@ xfs-y += $(addprefix $(XFS_LINUX)/, \ | |
3440 | xfs_lrw.o \ | |
3441 | xfs_super.o \ | |
3442 | xfs_vnode.o \ | |
3443 | - xfs_xattr.o) | |
3444 | + xfs_xattr.o \ | |
3445 | + xfs_ksyms.o) | |
3446 | ||
3447 | # Objects in support/ | |
3448 | xfs-y += $(addprefix support/, \ | |
3449 | Index: linux-2.6.27/fs/xfs/Kconfig | |
3450 | =================================================================== | |
3451 | --- linux-2.6.27.orig/fs/xfs/Kconfig | |
3452 | +++ linux-2.6.27/fs/xfs/Kconfig | |
3453 | @@ -35,6 +35,19 @@ config XFS_QUOTA | |
3454 | with or without the generic quota support enabled (CONFIG_QUOTA) - | |
3455 | they are completely independent subsystems. | |
3456 | ||
3457 | +config XFS_DMAPI | |
3458 | + tristate "XFS DMAPI support" | |
3459 | + depends on XFS_FS | |
3460 | + select DMAPI | |
3461 | + help | |
3462 | + The Data Management API is a system interface used to implement | |
3463 | + the interface defined in the X/Open document: | |
3464 | + "Systems Management: Data Storage Management (XDSM) API", | |
3465 | + dated February 1997. This interface is used by hierarchical | |
3466 | + storage management systems. | |
3467 | + | |
3468 | + If unsure, say N. | |
3469 | + | |
3470 | config XFS_POSIX_ACL | |
3471 | bool "XFS POSIX ACL support" | |
3472 | depends on XFS_FS | |
3473 | Index: linux-2.6.27/fs/xfs/xfs_mount.h | |
3474 | =================================================================== | |
3475 | --- linux-2.6.27.orig/fs/xfs/xfs_mount.h | |
3476 | +++ linux-2.6.27/fs/xfs/xfs_mount.h | |
3477 | @@ -341,6 +341,7 @@ typedef struct xfs_mount { | |
3478 | spinlock_t m_sync_lock; /* work item list lock */ | |
3479 | int m_sync_seq; /* sync thread generation no. */ | |
3480 | wait_queue_head_t m_wait_single_sync_task; | |
3481 | + struct vfsmount *m_vfsmount; | |
3482 | } xfs_mount_t; | |
3483 | ||
3484 | /* | |
3485 | Index: linux-2.6.27/fs/xfs/linux-2.6/xfs_super.c | |
3486 | =================================================================== | |
3487 | --- linux-2.6.27.orig/fs/xfs/linux-2.6/xfs_super.c | |
3488 | +++ linux-2.6.27/fs/xfs/linux-2.6/xfs_super.c | |
3489 | @@ -1835,8 +1835,16 @@ xfs_fs_get_sb( | |
3490 | void *data, | |
3491 | struct vfsmount *mnt) | |
3492 | { | |
3493 | - return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, | |
3494 | + int error; | |
3495 | + | |
3496 | + error = get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, | |
3497 | mnt); | |
3498 | + if (!error) { | |
3499 | + xfs_mount_t *mp = XFS_M(mnt->mnt_sb); | |
3500 | + mp->m_vfsmount = mnt; | |
3501 | + } | |
3502 | + | |
3503 | + return error; | |
3504 | } | |
3505 | ||
3506 | static struct super_operations xfs_super_operations = { | |
3507 | @@ -1861,13 +1869,14 @@ static struct quotactl_ops xfs_quotactl_ | |
3508 | .set_xquota = xfs_fs_setxquota, | |
3509 | }; | |
3510 | ||
3511 | -static struct file_system_type xfs_fs_type = { | |
3512 | +struct file_system_type xfs_fs_type = { | |
3513 | .owner = THIS_MODULE, | |
3514 | .name = "xfs", | |
3515 | .get_sb = xfs_fs_get_sb, | |
3516 | .kill_sb = kill_block_super, | |
3517 | .fs_flags = FS_REQUIRES_DEV, | |
3518 | }; | |
3519 | +EXPORT_SYMBOL(xfs_fs_type); | |
3520 | ||
3521 | STATIC int __init | |
3522 | xfs_alloc_trace_bufs(void) | |
3523 | Index: linux-2.6.27/fs/xfs/linux-2.6/xfs_file.c | |
3524 | =================================================================== | |
3525 | --- linux-2.6.27.orig/fs/xfs/linux-2.6/xfs_file.c | |
3526 | +++ linux-2.6.27/fs/xfs/linux-2.6/xfs_file.c | |
3527 | @@ -43,6 +43,9 @@ | |
3528 | #include <linux/smp_lock.h> | |
3529 | ||
3530 | static struct vm_operations_struct xfs_file_vm_ops; | |
3531 | +#ifdef HAVE_DMAPI | |
3532 | +static struct vm_operations_struct xfs_dmapi_file_vm_ops; | |
3533 | +#endif | |
3534 | ||
3535 | STATIC_INLINE ssize_t | |
3536 | __xfs_file_read( | |
3537 | @@ -204,6 +207,23 @@ xfs_file_fsync( | |
3538 | return -xfs_fsync(XFS_I(dentry->d_inode)); | |
3539 | } | |
3540 | ||
3541 | +#ifdef HAVE_DMAPI | |
3542 | +STATIC int | |
3543 | +xfs_vm_fault( | |
3544 | + struct vm_area_struct *vma, | |
3545 | + struct vm_fault *vmf) | |
3546 | +{ | |
3547 | + struct inode *inode = vma->vm_file->f_path.dentry->d_inode; | |
3548 | + struct xfs_mount *mp = XFS_M(inode->i_sb); | |
3549 | + | |
3550 | + ASSERT_ALWAYS(mp->m_flags & XFS_MOUNT_DMAPI); | |
3551 | + | |
3552 | + if (XFS_SEND_MMAP(mp, vma, 0)) | |
3553 | + return VM_FAULT_SIGBUS; | |
3554 | + return filemap_fault(vma, vmf); | |
3555 | +} | |
3556 | +#endif /* HAVE_DMAPI */ | |
3557 | + | |
3558 | /* | |
3559 | * Unfortunately we can't just use the clean and simple readdir implementation | |
3560 | * below, because nfs might call back into ->lookup from the filldir callback | |
3561 | @@ -372,6 +392,11 @@ xfs_file_mmap( | |
3562 | vma->vm_ops = &xfs_file_vm_ops; | |
3563 | vma->vm_flags |= VM_CAN_NONLINEAR | VM_PAGE_MKWRITE2; | |
3564 | ||
3565 | +#ifdef HAVE_DMAPI | |
3566 | + if (XFS_M(filp->f_path.dentry->d_inode->i_sb)->m_flags & XFS_MOUNT_DMAPI) | |
3567 | + vma->vm_ops = &xfs_dmapi_file_vm_ops; | |
3568 | +#endif /* HAVE_DMAPI */ | |
3569 | + | |
3570 | file_accessed(filp); | |
3571 | return 0; | |
3572 | } | |
3573 | @@ -418,6 +443,47 @@ xfs_file_ioctl_invis( | |
3574 | return error; | |
3575 | } | |
3576 | ||
3577 | +#ifdef HAVE_DMAPI | |
3578 | +#ifdef HAVE_VMOP_MPROTECT | |
3579 | +STATIC int | |
3580 | +xfs_vm_mprotect( | |
3581 | + struct vm_area_struct *vma, | |
3582 | + unsigned int newflags) | |
3583 | +{ | |
3584 | + struct inode *inode = vma->vm_file->f_path.dentry->d_inode; | |
3585 | + struct xfs_mount *mp = XFS_M(inode->i_sb); | |
3586 | + int error = 0; | |
3587 | + | |
3588 | + if (mp->m_flags & XFS_MOUNT_DMAPI) { | |
3589 | + if ((vma->vm_flags & VM_MAYSHARE) && | |
3590 | + (newflags & VM_WRITE) && !(vma->vm_flags & VM_WRITE)) | |
3591 | + error = XFS_SEND_MMAP(mp, vma, VM_WRITE); | |
3592 | + } | |
3593 | + return error; | |
3594 | +} | |
3595 | +#endif /* HAVE_VMOP_MPROTECT */ | |
3596 | +#endif /* HAVE_DMAPI */ | |
3597 | + | |
3598 | +#ifdef HAVE_FOP_OPEN_EXEC | |
3599 | +/* If the user is attempting to execute a file that is offline then | |
3600 | + * we have to trigger a DMAPI READ event before the file is marked as busy | |
3601 | + * otherwise the invisible I/O will not be able to write to the file to bring | |
3602 | + * it back online. | |
3603 | + */ | |
3604 | +STATIC int | |
3605 | +xfs_file_open_exec( | |
3606 | + struct inode *inode) | |
3607 | +{ | |
3608 | + struct xfs_mount *mp = XFS_M(inode->i_sb); | |
3609 | + struct xfs_inode *ip = XFS_I(inode); | |
3610 | + | |
3611 | + if (unlikely(mp->m_flags & XFS_MOUNT_DMAPI) && | |
3612 | + DM_EVENT_ENABLED(ip, DM_EVENT_READ)) | |
3613 | + return -XFS_SEND_DATA(mp, DM_EVENT_READ, ip, 0, 0, 0, NULL); | |
3614 | + return 0; | |
3615 | +} | |
3616 | +#endif /* HAVE_FOP_OPEN_EXEC */ | |
3617 | + | |
3618 | /* | |
3619 | * mmap()d file has taken write protection fault and is being made | |
3620 | * writable. We can set the page state up correctly for a writable | |
3621 | @@ -487,3 +553,13 @@ static struct vm_operations_struct xfs_f | |
3622 | .fault = filemap_fault, | |
3623 | ._pmkw.page_mkwrite2 = xfs_vm_page_mkwrite, | |
3624 | }; | |
3625 | + | |
3626 | +#ifdef HAVE_DMAPI | |
3627 | +static struct vm_operations_struct xfs_dmapi_file_vm_ops = { | |
3628 | + .fault = xfs_vm_fault, | |
3629 | + ._pmkw.page_mkwrite2 = xfs_vm_page_mkwrite, | |
3630 | +#ifdef HAVE_VMOP_MPROTECT | |
3631 | + .mprotect = xfs_vm_mprotect, | |
3632 | +#endif | |
3633 | +}; | |
3634 | +#endif /* HAVE_DMAPI */ | |
3635 | Index: linux-2.6.27/fs/xfs/linux-2.6/xfs_linux.h | |
3636 | =================================================================== | |
3637 | --- linux-2.6.27.orig/fs/xfs/linux-2.6/xfs_linux.h | |
3638 | +++ linux-2.6.27/fs/xfs/linux-2.6/xfs_linux.h | |
3639 | @@ -180,6 +180,10 @@ | |
3640 | #define xfs_itruncate_data(ip, off) \ | |
3641 | (-vmtruncate(VFS_I(ip), (off))) | |
3642 | ||
3643 | +#undef HAVE_DMAPI | |
3644 | +#if defined(CONFIG_XFS_DMAPI) || defined(CONFIG_XFS_DMAPI_MODULE) | |
3645 | +#define HAVE_DMAPI | |
3646 | +#endif | |
3647 | ||
3648 | /* Move the kernel do_div definition off to one side */ | |
3649 | ||
3650 | Index: linux-2.6.27/fs/xfs/xfs_dmops.c | |
3651 | =================================================================== | |
3652 | --- linux-2.6.27.orig/fs/xfs/xfs_dmops.c | |
3653 | +++ linux-2.6.27/fs/xfs/xfs_dmops.c | |
3654 | @@ -41,9 +41,21 @@ int | |
3655 | xfs_dmops_get(struct xfs_mount *mp, struct xfs_mount_args *args) | |
3656 | { | |
3657 | if (args->flags & XFSMNT_DMAPI) { | |
3658 | - cmn_err(CE_WARN, | |
3659 | - "XFS: dmapi support not available in this kernel."); | |
3660 | - return EINVAL; | |
3661 | + struct xfs_dmops *ops; | |
3662 | + | |
3663 | + ops = symbol_get(xfs_dmcore_xfs); | |
3664 | + if (!ops) { | |
3665 | + request_module("xfs_dmapi"); | |
3666 | + ops = symbol_get(xfs_dmcore_xfs); | |
3667 | + } | |
3668 | + | |
3669 | + if (!ops) { | |
3670 | + cmn_err(CE_WARN, "XFS: no dmapi support available."); | |
3671 | + return EINVAL; | |
3672 | + } | |
3673 | + mp->m_dm_ops = ops; | |
3674 | + } else { | |
3675 | + mp->m_dm_ops = &xfs_dmcore_stub; | |
3676 | } | |
3677 | ||
3678 | mp->m_dm_ops = &xfs_dmcore_stub; | |
3679 | @@ -53,4 +65,6 @@ xfs_dmops_get(struct xfs_mount *mp, stru | |
3680 | void | |
3681 | xfs_dmops_put(struct xfs_mount *mp) | |
3682 | { | |
3683 | + if (mp->m_dm_ops != &xfs_dmcore_stub) | |
3684 | + symbol_put(xfs_dmcore_xfs); | |
3685 | } | |
3686 | Index: linux-2.6.27/fs/xfs/linux-2.6/xfs_ksyms.c | |
3687 | =================================================================== | |
3688 | --- /dev/null | |
3689 | +++ linux-2.6.27/fs/xfs/linux-2.6/xfs_ksyms.c | |
3690 | @@ -0,0 +1,99 @@ | |
3691 | +/* | |
3692 | + * Copyright (c) 2004-2008 Silicon Graphics, Inc. | |
3693 | + * All Rights Reserved. | |
3694 | + * | |
3695 | + * This program is free software; you can redistribute it and/or | |
3696 | + * modify it under the terms of the GNU General Public License as | |
3697 | + * published by the Free Software Foundation. | |
3698 | + * | |
3699 | + * This program is distributed in the hope that it would be useful, | |
3700 | + * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
3701 | + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
3702 | + * GNU General Public License for more details. | |
3703 | + * | |
3704 | + * You should have received a copy of the GNU General Public License | |
3705 | + * along with this program; if not, write the Free Software Foundation, | |
3706 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
3707 | + */ | |
3708 | + | |
3709 | +#include "xfs.h" | |
3710 | +#include "xfs_fs.h" | |
3711 | +#include "xfs_bit.h" | |
3712 | +#include "xfs_buf.h" | |
3713 | +#include "xfs_log.h" | |
3714 | +#include "xfs_imap.h" | |
3715 | +#include "xfs_inum.h" | |
3716 | +#include "xfs_clnt.h" | |
3717 | +#include "xfs_trans.h" | |
3718 | +#include "xfs_sb.h" | |
3719 | +#include "xfs_ag.h" | |
3720 | +#include "xfs_dir2.h" | |
3721 | +#include "xfs_alloc.h" | |
3722 | +#include "xfs_dmapi.h" | |
3723 | +#include "xfs_quota.h" | |
3724 | +#include "xfs_mount.h" | |
3725 | +#include "xfs_da_btree.h" | |
3726 | +#include "xfs_bmap_btree.h" | |
3727 | +#include "xfs_alloc_btree.h" | |
3728 | +#include "xfs_ialloc_btree.h" | |
3729 | +#include "xfs_dir2_sf.h" | |
3730 | +#include "xfs_attr_sf.h" | |
3731 | +#include "xfs_dinode.h" | |
3732 | +#include "xfs_inode.h" | |
3733 | +#include "xfs_btree.h" | |
3734 | +#include "xfs_ialloc.h" | |
3735 | +#include "xfs_bmap.h" | |
3736 | +#include "xfs_rtalloc.h" | |
3737 | +#include "xfs_error.h" | |
3738 | +#include "xfs_itable.h" | |
3739 | +#include "xfs_rw.h" | |
3740 | +#include "xfs_dir2_data.h" | |
3741 | +#include "xfs_dir2_leaf.h" | |
3742 | +#include "xfs_dir2_block.h" | |
3743 | +#include "xfs_dir2_node.h" | |
3744 | +#include "xfs_dir2_trace.h" | |
3745 | +#include "xfs_acl.h" | |
3746 | +#include "xfs_attr.h" | |
3747 | +#include "xfs_attr_leaf.h" | |
3748 | +#include "xfs_inode_item.h" | |
3749 | +#include "xfs_buf_item.h" | |
3750 | +#include "xfs_extfree_item.h" | |
3751 | +#include "xfs_log_priv.h" | |
3752 | +#include "xfs_trans_priv.h" | |
3753 | +#include "xfs_trans_space.h" | |
3754 | +#include "xfs_utils.h" | |
3755 | +#include "xfs_iomap.h" | |
3756 | +#include "xfs_filestream.h" | |
3757 | +#include "xfs_vnodeops.h" | |
3758 | +#include "xfs_vfsops.h" | |
3759 | +#include "support/ktrace.h" | |
3760 | + | |
3761 | +EXPORT_SYMBOL(xfs_iunlock); | |
3762 | +EXPORT_SYMBOL(xfs_invis_file_operations); | |
3763 | +EXPORT_SYMBOL(xfs_attr_remove); | |
3764 | +EXPORT_SYMBOL(xfs_iunlock_map_shared); | |
3765 | +EXPORT_SYMBOL(xfs_iget); | |
3766 | +EXPORT_SYMBOL(xfs_bmapi); | |
3767 | +EXPORT_SYMBOL(xfs_internal_inum); | |
3768 | +EXPORT_SYMBOL(sys_cred); | |
3769 | +EXPORT_SYMBOL(xfs_attr_set); | |
3770 | +EXPORT_SYMBOL(xfs_trans_reserve); | |
3771 | +EXPORT_SYMBOL(xfs_trans_ijoin); | |
3772 | +EXPORT_SYMBOL(xfs_free_eofblocks); | |
3773 | +EXPORT_SYMBOL(kmem_free); | |
3774 | +EXPORT_SYMBOL(_xfs_trans_commit); | |
3775 | +EXPORT_SYMBOL(xfs_ilock); | |
3776 | +EXPORT_SYMBOL(xfs_attr_get); | |
3777 | +EXPORT_SYMBOL(xfs_readdir); | |
3778 | +EXPORT_SYMBOL(xfs_setattr); | |
3779 | +EXPORT_SYMBOL(xfs_trans_alloc); | |
3780 | +EXPORT_SYMBOL(xfs_trans_cancel); | |
3781 | +EXPORT_SYMBOL(xfs_fsync); | |
3782 | +EXPORT_SYMBOL(xfs_iput_new); | |
3783 | +EXPORT_SYMBOL(xfs_bulkstat); | |
3784 | +EXPORT_SYMBOL(xfs_ilock_map_shared); | |
3785 | +EXPORT_SYMBOL(xfs_iput); | |
3786 | +EXPORT_SYMBOL(xfs_trans_log_inode); | |
3787 | +EXPORT_SYMBOL(xfs_attr_list); | |
3788 | +EXPORT_SYMBOL(kmem_alloc); | |
3789 | +EXPORT_SYMBOL(xfs_change_file_space); |