blob: 87505f7eb7458d77c5a4e5426dbf98d4a900b2d0 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Steven Whitehouse3a8a9a12006-05-18 15:09:15 -04003 * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +00004 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -04007 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +00008 */
9
10#include <linux/sched.h>
11#include <linux/slab.h>
12#include <linux/spinlock.h>
13#include <linux/completion.h>
14#include <linux/buffer_head.h>
15#include <linux/posix_acl.h>
16#include <linux/sort.h>
Steven Whitehouse5c676f62006-02-27 17:23:27 -050017#include <linux/gfs2_ondisk.h>
Steven Whitehouse71b86f52006-03-28 14:14:04 -050018#include <linux/crc32.h>
Fabio Massimo Di Nitto7d308592006-09-19 07:56:29 +020019#include <linux/lm_interface.h>
Ryan O'Harafcb47e02006-10-03 11:57:35 -040020#include <linux/security.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000021
22#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050023#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000024#include "acl.h"
25#include "bmap.h"
26#include "dir.h"
27#include "eattr.h"
28#include "glock.h"
29#include "glops.h"
30#include "inode.h"
31#include "log.h"
32#include "meta_io.h"
33#include "ops_address.h"
34#include "ops_file.h"
35#include "ops_inode.h"
36#include "quota.h"
37#include "rgrp.h"
38#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050039#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000040
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010041struct gfs2_inum_range_host {
42 u64 ir_start;
43 u64 ir_length;
44};
45
David Teiglandb3b94fa2006-01-16 16:50:04 +000046static int iget_test(struct inode *inode, void *opaque)
47{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040048 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010049 u64 *no_addr = opaque;
David Teiglandb3b94fa2006-01-16 16:50:04 +000050
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010051 if (ip->i_no_addr == *no_addr &&
Steven Whitehouse1be38672007-03-01 10:00:53 +000052 inode->i_private != NULL)
David Teiglandb3b94fa2006-01-16 16:50:04 +000053 return 1;
54
55 return 0;
56}
57
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040058static int iget_set(struct inode *inode, void *opaque)
59{
60 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010061 u64 *no_addr = opaque;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040062
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010063 inode->i_ino = (unsigned long)*no_addr;
64 ip->i_no_addr = *no_addr;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040065 return 0;
66}
67
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010068struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000069{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010070 unsigned long hash = (unsigned long)no_addr;
71 return ilookup5(sb, hash, iget_test, &no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +000072}
73
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010074static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000075{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010076 unsigned long hash = (unsigned long)no_addr;
77 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040078}
79
80/**
81 * gfs2_inode_lookup - Lookup an inode
82 * @sb: The super block
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010083 * @no_addr: The inode number
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040084 * @type: The type of the inode
85 *
86 * Returns: A VFS inode, or an error
87 */
88
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010089struct inode *gfs2_inode_lookup(struct super_block *sb, u64 no_addr, unsigned int type)
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040090{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010091 struct inode *inode = gfs2_iget(sb, no_addr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040092 struct gfs2_inode *ip = GFS2_I(inode);
93 struct gfs2_glock *io_gl;
94 int error;
95
Steven Whitehouse26d83de2006-10-30 16:59:08 -050096 if (!inode)
97 return ERR_PTR(-ENOBUFS);
98
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040099 if (inode->i_state & I_NEW) {
100 struct gfs2_sbd *sdp = GFS2_SB(inode);
101 umode_t mode = DT2IF(type);
Theodore Ts'obba9dfd2006-09-27 01:50:31 -0700102 inode->i_private = ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400103 inode->i_mode = mode;
104
105 if (S_ISREG(mode)) {
106 inode->i_op = &gfs2_file_iops;
107 inode->i_fop = &gfs2_file_fops;
108 inode->i_mapping->a_ops = &gfs2_file_aops;
109 } else if (S_ISDIR(mode)) {
110 inode->i_op = &gfs2_dir_iops;
111 inode->i_fop = &gfs2_dir_fops;
112 } else if (S_ISLNK(mode)) {
113 inode->i_op = &gfs2_symlink_iops;
114 } else {
115 inode->i_op = &gfs2_dev_iops;
116 }
117
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100118 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400119 if (unlikely(error))
120 goto fail;
121 ip->i_gl->gl_object = ip;
122
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100123 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400124 if (unlikely(error))
125 goto fail_put;
126
Steven Whitehousebfded272006-11-01 16:05:38 -0500127 set_bit(GIF_INVALID, &ip->i_flags);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400128 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
129 if (unlikely(error))
130 goto fail_iopen;
131
132 gfs2_glock_put(io_gl);
133 unlock_new_inode(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000134 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400135
136 return inode;
137fail_iopen:
138 gfs2_glock_put(io_gl);
139fail_put:
140 ip->i_gl->gl_object = NULL;
141 gfs2_glock_put(ip->i_gl);
142fail:
143 iput(inode);
144 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000145}
146
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500147static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
Steven Whitehouseea744d02006-10-31 15:28:00 -0500148{
149 struct gfs2_dinode_host *di = &ip->i_di;
150 const struct gfs2_dinode *str = buf;
151
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100152 if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) {
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500153 if (gfs2_consist_inode(ip))
154 gfs2_dinode_print(ip);
155 return -EIO;
156 }
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100157 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500158 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500159 ip->i_inode.i_rdev = 0;
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500160 switch (ip->i_inode.i_mode & S_IFMT) {
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500161 case S_IFBLK:
162 case S_IFCHR:
163 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
164 be32_to_cpu(str->di_minor));
165 break;
166 };
167
Steven Whitehouse2933f922006-11-01 13:23:29 -0500168 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
169 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
Steven Whitehouse4f561102006-11-01 14:04:17 -0500170 /*
171 * We will need to review setting the nlink count here in the
172 * light of the forthcoming ro bind mount work. This is a reminder
173 * to do that.
174 */
175 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500176 di->di_size = be64_to_cpu(str->di_size);
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -0500177 i_size_write(&ip->i_inode, di->di_size);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500178 di->di_blocks = be64_to_cpu(str->di_blocks);
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -0500179 gfs2_set_inode_blocks(&ip->i_inode);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500180 ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100181 ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500182 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100183 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500184 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100185 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500186
187 di->di_goal_meta = be64_to_cpu(str->di_goal_meta);
188 di->di_goal_data = be64_to_cpu(str->di_goal_data);
189 di->di_generation = be64_to_cpu(str->di_generation);
190
191 di->di_flags = be32_to_cpu(str->di_flags);
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500192 gfs2_set_inode_flags(&ip->i_inode);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500193 di->di_height = be16_to_cpu(str->di_height);
194
195 di->di_depth = be16_to_cpu(str->di_depth);
196 di->di_entries = be32_to_cpu(str->di_entries);
197
198 di->di_eattr = be64_to_cpu(str->di_eattr);
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500199 return 0;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500200}
201
David Teiglandb3b94fa2006-01-16 16:50:04 +0000202/**
203 * gfs2_inode_refresh - Refresh the incore copy of the dinode
204 * @ip: The GFS2 inode
205 *
206 * Returns: errno
207 */
208
209int gfs2_inode_refresh(struct gfs2_inode *ip)
210{
211 struct buffer_head *dibh;
212 int error;
213
214 error = gfs2_meta_inode_buffer(ip, &dibh);
215 if (error)
216 return error;
217
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400218 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000219 brelse(dibh);
220 return -EIO;
221 }
222
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500223 error = gfs2_dinode_in(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000224 brelse(dibh);
Steven Whitehousebfded272006-11-01 16:05:38 -0500225 clear_bit(GIF_INVALID, &ip->i_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000226
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500227 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000228}
229
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400230int gfs2_dinode_dealloc(struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000231{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400232 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000233 struct gfs2_alloc *al;
234 struct gfs2_rgrpd *rgd;
235 int error;
236
237 if (ip->i_di.di_blocks != 1) {
238 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500239 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000240 return -EIO;
241 }
242
243 al = gfs2_alloc_get(ip);
244
245 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
246 if (error)
247 goto out;
248
249 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
250 if (error)
251 goto out_qs;
252
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100253 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000254 if (!rgd) {
255 gfs2_consist_inode(ip);
256 error = -EIO;
257 goto out_rindex_relse;
258 }
259
260 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
261 &al->al_rgd_gh);
262 if (error)
263 goto out_rindex_relse;
264
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400265 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000266 if (error)
267 goto out_rg_gunlock;
268
269 gfs2_trans_add_gl(ip->i_gl);
270
271 gfs2_free_di(rgd, ip);
272
David Teiglandb3b94fa2006-01-16 16:50:04 +0000273 gfs2_trans_end(sdp);
274 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
275
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400276out_rg_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000277 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400278out_rindex_relse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000279 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400280out_qs:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000281 gfs2_quota_unhold(ip);
Steven Whitehouse36327522006-04-28 10:46:21 -0400282out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400283 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000284 return error;
285}
286
287/**
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500288 * gfs2_change_nlink - Change nlink count on inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000289 * @ip: The GFS2 inode
290 * @diff: The change in the nlink count required
291 *
292 * Returns: errno
293 */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500294int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000295{
296 struct buffer_head *dibh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400297 u32 nlink;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000298 int error;
299
Steven Whitehouse4f561102006-11-01 14:04:17 -0500300 BUG_ON(diff != 1 && diff != -1);
301 nlink = ip->i_inode.i_nlink + diff;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000302
303 /* If we are reducing the nlink count, but the new value ends up being
304 bigger than the old one, we must have underflowed. */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500305 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000306 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500307 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000308 return -EIO;
309 }
310
311 error = gfs2_meta_inode_buffer(ip, &dibh);
312 if (error)
313 return error;
314
Steven Whitehouse4f561102006-11-01 14:04:17 -0500315 if (diff > 0)
316 inc_nlink(&ip->i_inode);
317 else
318 drop_nlink(&ip->i_inode);
319
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100320 ip->i_inode.i_ctime = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000321
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000322 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500323 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000324 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400325 mark_inode_dirty(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000326
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500327 if (ip->i_inode.i_nlink == 0)
Russell Cattelanddee7602007-01-29 17:13:44 -0600328 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500329
S. Wendy Cheng55098262007-01-18 15:56:34 -0500330 return error;
331}
332
Steven Whitehousec7526662006-03-20 12:30:04 -0500333struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
334{
335 struct qstr qstr;
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600336 struct inode *inode;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500337 gfs2_str2qstr(&qstr, name);
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600338 inode = gfs2_lookupi(dip, &qstr, 1, NULL);
339 /* gfs2_lookupi has inconsistent callers: vfs
340 * related routines expect NULL for no entry found,
341 * gfs2_lookup_simple callers expect ENOENT
342 * and do not check for NULL.
343 */
344 if (inode == NULL)
345 return ERR_PTR(-ENOENT);
346 else
347 return inode;
Steven Whitehousec7526662006-03-20 12:30:04 -0500348}
349
350
David Teiglandb3b94fa2006-01-16 16:50:04 +0000351/**
352 * gfs2_lookupi - Look up a filename in a directory and return its inode
353 * @d_gh: An initialized holder for the directory glock
354 * @name: The name of the inode to look for
355 * @is_root: If 1, ignore the caller's permissions
356 * @i_gh: An uninitialized holder for the new inode glock
357 *
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000358 * This can be called via the VFS filldir function when NFS is doing
359 * a readdirplus and the inode which its intending to stat isn't
360 * already in cache. In this case we must not take the directory glock
361 * again, since the readdir call will have already taken that lock.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000362 *
363 * Returns: errno
364 */
365
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400366struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
367 int is_root, struct nameidata *nd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000368{
Steven Whitehousec9fd4302006-03-01 15:31:02 -0500369 struct super_block *sb = dir->i_sb;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400370 struct gfs2_inode *dip = GFS2_I(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000371 struct gfs2_holder d_gh;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000372 int error;
Steven Whitehousec7526662006-03-20 12:30:04 -0500373 struct inode *inode = NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000374 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000375
376 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehousec7526662006-03-20 12:30:04 -0500377 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000378
Steven Whitehousec7526662006-03-20 12:30:04 -0500379 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
380 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
381 dir == sb->s_root->d_inode)) {
Steven Whitehouse320dd102006-05-18 16:25:27 -0400382 igrab(dir);
383 return dir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000384 }
385
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000386 if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) {
387 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
388 if (error)
389 return ERR_PTR(error);
390 unlock = 1;
391 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000392
393 if (!is_root) {
Steven Whitehousefaf450e2006-06-22 10:59:10 -0400394 error = permission(dir, MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000395 if (error)
396 goto out;
397 }
398
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100399 inode = gfs2_dir_search(dir, name);
400 if (IS_ERR(inode))
401 error = PTR_ERR(inode);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000402out:
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000403 if (unlock)
404 gfs2_glock_dq_uninit(&d_gh);
Steven Whitehousec7526662006-03-20 12:30:04 -0500405 if (error == -ENOENT)
406 return NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000407 return inode ? inode : ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000408}
409
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100410static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
411{
412 const struct gfs2_inum_range *str = buf;
413
414 ir->ir_start = be64_to_cpu(str->ir_start);
415 ir->ir_length = be64_to_cpu(str->ir_length);
416}
417
418static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
419{
420 struct gfs2_inum_range *str = buf;
421
422 str->ir_start = cpu_to_be64(ir->ir_start);
423 str->ir_length = cpu_to_be64(ir->ir_length);
424}
425
Steven Whitehousecd915492006-09-04 12:49:07 -0400426static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000427{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400428 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000429 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400430 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000431 int error;
432
433 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
434 if (error)
435 return error;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000436 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000437
438 error = gfs2_meta_inode_buffer(ip, &bh);
439 if (error) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000440 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000441 gfs2_trans_end(sdp);
442 return error;
443 }
444
445 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
446
447 if (ir.ir_length) {
448 *formal_ino = ir.ir_start++;
449 ir.ir_length--;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000450 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000451 gfs2_inum_range_out(&ir,
452 bh->b_data + sizeof(struct gfs2_dinode));
453 brelse(bh);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000454 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000455 gfs2_trans_end(sdp);
456 return 0;
457 }
458
459 brelse(bh);
460
Steven Whitehousef55ab262006-02-21 12:51:39 +0000461 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000462 gfs2_trans_end(sdp);
463
464 return 1;
465}
466
Steven Whitehousecd915492006-09-04 12:49:07 -0400467static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000468{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400469 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
470 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000471 struct gfs2_holder gh;
472 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400473 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000474 int error;
475
476 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
477 if (error)
478 return error;
479
480 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
481 if (error)
482 goto out;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000483 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000484
485 error = gfs2_meta_inode_buffer(ip, &bh);
486 if (error)
487 goto out_end_trans;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400488
David Teiglandb3b94fa2006-01-16 16:50:04 +0000489 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
490
491 if (!ir.ir_length) {
492 struct buffer_head *m_bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400493 u64 x, y;
Al Virob44b84d2006-10-14 10:46:30 -0400494 __be64 z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000495
496 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
497 if (error)
498 goto out_brelse;
499
Al Virob44b84d2006-10-14 10:46:30 -0400500 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
501 x = y = be64_to_cpu(z);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000502 ir.ir_start = x;
503 ir.ir_length = GFS2_INUM_QUANTUM;
504 x += GFS2_INUM_QUANTUM;
505 if (x < y)
506 gfs2_consist_inode(m_ip);
Al Virob44b84d2006-10-14 10:46:30 -0400507 z = cpu_to_be64(x);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000508 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
Al Virob44b84d2006-10-14 10:46:30 -0400509 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000510
511 brelse(m_bh);
512 }
513
514 *formal_ino = ir.ir_start++;
515 ir.ir_length--;
516
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000517 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000518 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
519
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400520out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000521 brelse(bh);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400522out_end_trans:
Steven Whitehousef55ab262006-02-21 12:51:39 +0000523 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000524 gfs2_trans_end(sdp);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400525out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000526 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000527 return error;
528}
529
Steven Whitehousecd915492006-09-04 12:49:07 -0400530static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000531{
532 int error;
533
534 error = pick_formal_ino_1(sdp, inum);
535 if (error <= 0)
536 return error;
537
538 error = pick_formal_ino_2(sdp, inum);
539
540 return error;
541}
542
543/**
544 * create_ok - OK to create a new on-disk inode here?
545 * @dip: Directory in which dinode is to be created
546 * @name: Name of new dinode
547 * @mode:
548 *
549 * Returns: errno
550 */
551
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400552static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000553 unsigned int mode)
554{
555 int error;
556
Steven Whitehousefaf450e2006-06-22 10:59:10 -0400557 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000558 if (error)
559 return error;
560
561 /* Don't create entries in an unlinked directory */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500562 if (!dip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000563 return -EPERM;
564
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100565 error = gfs2_dir_check(&dip->i_inode, name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000566 switch (error) {
567 case -ENOENT:
568 error = 0;
569 break;
570 case 0:
571 return -EEXIST;
572 default:
573 return error;
574 }
575
Steven Whitehousecd915492006-09-04 12:49:07 -0400576 if (dip->i_di.di_entries == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000577 return -EFBIG;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500578 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000579 return -EMLINK;
580
581 return 0;
582}
583
584static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
585 unsigned int *uid, unsigned int *gid)
586{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400587 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
Steven Whitehouse2933f922006-11-01 13:23:29 -0500588 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000589 if (S_ISDIR(*mode))
590 *mode |= S_ISUID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500591 else if (dip->i_inode.i_uid != current->fsuid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000592 *mode &= ~07111;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500593 *uid = dip->i_inode.i_uid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000594 } else
595 *uid = current->fsuid;
596
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500597 if (dip->i_inode.i_mode & S_ISGID) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000598 if (S_ISDIR(*mode))
599 *mode |= S_ISGID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500600 *gid = dip->i_inode.i_gid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000601 } else
602 *gid = current->fsgid;
603}
604
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100605static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400607 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000608 int error;
609
610 gfs2_alloc_get(dip);
611
612 dip->i_alloc.al_requested = RES_DINODE;
613 error = gfs2_inplace_reserve(dip);
614 if (error)
615 goto out;
616
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400617 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000618 if (error)
619 goto out_ipreserv;
620
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100621 *no_addr = gfs2_alloc_di(dip, generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000622
623 gfs2_trans_end(sdp);
624
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400625out_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000626 gfs2_inplace_release(dip);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400627out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000628 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000629 return error;
630}
631
632/**
633 * init_dinode - Fill in a new dinode structure
634 * @dip: the directory this inode is being created in
635 * @gl: The glock covering the new inode
636 * @inum: the inode number
637 * @mode: the file permissions
638 * @uid:
639 * @gid:
640 *
641 */
642
643static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400644 const struct gfs2_inum_host *inum, unsigned int mode,
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400645 unsigned int uid, unsigned int gid,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500646 const u64 *generation, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000647{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400648 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000649 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000650 struct buffer_head *dibh;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100651 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000652
653 dibh = gfs2_meta_new(gl, inum->no_addr);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000654 gfs2_trans_add_bh(gl, dibh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000655 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
656 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000657 di = (struct gfs2_dinode *)dibh->b_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000658
Steven Whitehouse2442a092006-01-30 11:49:32 +0000659 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
660 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000661 di->di_mode = cpu_to_be32(mode);
662 di->di_uid = cpu_to_be32(uid);
663 di->di_gid = cpu_to_be32(gid);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500664 di->di_nlink = 0;
665 di->di_size = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000666 di->di_blocks = cpu_to_be64(1);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100667 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500668 di->di_major = cpu_to_be32(MAJOR(dev));
669 di->di_minor = cpu_to_be32(MINOR(dev));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000670 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400671 di->di_generation = cpu_to_be64(*generation);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500672 di->di_flags = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000673
674 if (S_ISREG(mode)) {
675 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
676 gfs2_tune_get(sdp, gt_new_files_jdata))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000677 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000678 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
679 gfs2_tune_get(sdp, gt_new_files_directio))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000680 di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000681 } else if (S_ISDIR(mode)) {
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500682 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
683 GFS2_DIF_INHERIT_DIRECTIO);
684 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
685 GFS2_DIF_INHERIT_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000686 }
687
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000688 di->__pad1 = 0;
Steven Whitehousea9583c72006-11-01 20:09:14 -0500689 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500690 di->di_height = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000691 di->__pad2 = 0;
692 di->__pad3 = 0;
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500693 di->di_depth = 0;
694 di->di_entries = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000695 memset(&di->__pad4, 0, sizeof(di->__pad4));
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500696 di->di_eattr = 0;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100697 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
698 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
699 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000700 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
701
David Teiglandb3b94fa2006-01-16 16:50:04 +0000702 brelse(dibh);
703}
704
705static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400706 unsigned int mode, const struct gfs2_inum_host *inum,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500707 const u64 *generation, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000708{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400709 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000710 unsigned int uid, gid;
711 int error;
712
713 munge_mode_uid_gid(dip, &mode, &uid, &gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 gfs2_alloc_get(dip);
715
716 error = gfs2_quota_lock(dip, uid, gid);
717 if (error)
718 goto out;
719
720 error = gfs2_quota_check(dip, uid, gid);
721 if (error)
722 goto out_quota;
723
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400724 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000725 if (error)
726 goto out_quota;
727
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500728 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000729 gfs2_quota_change(dip, +1, uid, gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000730 gfs2_trans_end(sdp);
731
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400732out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000733 gfs2_quota_unlock(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400734out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000735 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000736 return error;
737}
738
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400739static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
740 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000741{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400742 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000743 struct gfs2_alloc *al;
744 int alloc_required;
745 struct buffer_head *dibh;
746 int error;
747
748 al = gfs2_alloc_get(dip);
749
750 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
751 if (error)
752 goto fail;
753
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400754 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
Steven Whitehousec7526662006-03-20 12:30:04 -0500755 if (alloc_required < 0)
756 goto fail;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000757 if (alloc_required) {
Steven Whitehouse2933f922006-11-01 13:23:29 -0500758 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000759 if (error)
760 goto fail_quota_locks;
761
762 al->al_requested = sdp->sd_max_dirres;
763
764 error = gfs2_inplace_reserve(dip);
765 if (error)
766 goto fail_quota_locks;
767
Steven Whitehouse320dd102006-05-18 16:25:27 -0400768 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100769 al->al_rgd->rd_length +
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400770 2 * RES_DINODE +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000771 RES_STATFS + RES_QUOTA, 0);
772 if (error)
773 goto fail_ipreserv;
774 } else {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400775 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000776 if (error)
777 goto fail_quota_locks;
778 }
779
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100780 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000781 if (error)
782 goto fail_end_trans;
783
784 error = gfs2_meta_inode_buffer(ip, &dibh);
785 if (error)
786 goto fail_end_trans;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500787 ip->i_inode.i_nlink = 1;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000788 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500789 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000790 brelse(dibh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000791 return 0;
792
Steven Whitehouse320dd102006-05-18 16:25:27 -0400793fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000794 gfs2_trans_end(sdp);
795
Steven Whitehouse320dd102006-05-18 16:25:27 -0400796fail_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000797 if (dip->i_alloc.al_rgd)
798 gfs2_inplace_release(dip);
799
Steven Whitehouse320dd102006-05-18 16:25:27 -0400800fail_quota_locks:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000801 gfs2_quota_unlock(dip);
802
Steven Whitehouse320dd102006-05-18 16:25:27 -0400803fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000804 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000805 return error;
806}
807
Ryan O'Harafcb47e02006-10-03 11:57:35 -0400808static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
809{
810 int err;
811 size_t len;
812 void *value;
813 char *name;
814 struct gfs2_ea_request er;
815
816 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
817 &name, &value, &len);
818
819 if (err) {
820 if (err == -EOPNOTSUPP)
821 return 0;
822 return err;
823 }
824
825 memset(&er, 0, sizeof(struct gfs2_ea_request));
826
827 er.er_type = GFS2_EATYPE_SECURITY;
828 er.er_name = name;
829 er.er_data = value;
830 er.er_name_len = strlen(name);
831 er.er_data_len = len;
832
833 err = gfs2_ea_set_i(ip, &er);
834
835 kfree(value);
836 kfree(name);
837
838 return err;
839}
840
David Teiglandb3b94fa2006-01-16 16:50:04 +0000841/**
842 * gfs2_createi - Create a new inode
843 * @ghs: An array of two holders
844 * @name: The name of the new file
845 * @mode: the permissions on the new inode
846 *
847 * @ghs[0] is an initialized holder for the directory
848 * @ghs[1] is the holder for the inode lock
849 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000850 * If the return value is not NULL, the glocks on both the directory and the new
David Teiglandb3b94fa2006-01-16 16:50:04 +0000851 * file are held. A transaction has been started and an inplace reservation
852 * is held, as well.
853 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000854 * Returns: An inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000855 */
856
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400857struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500858 unsigned int mode, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859{
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100860 struct inode *inode = NULL;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500861 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400862 struct inode *dir = &dip->i_inode;
863 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100864 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000865 int error;
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400866 u64 generation;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867
868 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehouse7359a192006-02-13 12:27:43 +0000869 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000870
David Teiglandb3b94fa2006-01-16 16:50:04 +0000871 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
872 error = gfs2_glock_nq(ghs);
873 if (error)
874 goto fail;
875
876 error = create_ok(dip, name, mode);
877 if (error)
878 goto fail_gunlock;
879
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400880 error = pick_formal_ino(sdp, &inum.no_formal_ino);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000881 if (error)
882 goto fail_gunlock;
883
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100884 error = alloc_dinode(dip, &inum.no_addr, &generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000885 if (error)
886 goto fail_gunlock;
887
Steven Whitehouse28626e22006-11-22 11:13:21 -0500888 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
889 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
890 if (error)
891 goto fail_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000892
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500893 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 if (error)
895 goto fail_gunlock2;
896
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100897 inode = gfs2_inode_lookup(dir->i_sb, inum.no_addr, IF2DT(mode));
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400898 if (IS_ERR(inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000899 goto fail_gunlock2;
900
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400901 error = gfs2_inode_refresh(GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000902 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100903 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000904
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400905 error = gfs2_acl_create(dip, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000906 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100907 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000908
Ryan O'Harafcb47e02006-10-03 11:57:35 -0400909 error = gfs2_security_init(dip, GFS2_I(inode));
910 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100911 goto fail_gunlock2;
Ryan O'Harafcb47e02006-10-03 11:57:35 -0400912
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400913 error = link_dinode(dip, name, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000914 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100915 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000916
Steven Whitehouse7359a192006-02-13 12:27:43 +0000917 if (!inode)
918 return ERR_PTR(-ENOMEM);
919 return inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000920
Steven Whitehouse320dd102006-05-18 16:25:27 -0400921fail_gunlock2:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000922 gfs2_glock_dq_uninit(ghs + 1);
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100923 if (inode)
924 iput(inode);
Steven Whitehouse320dd102006-05-18 16:25:27 -0400925fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000926 gfs2_glock_dq(ghs);
Steven Whitehouse320dd102006-05-18 16:25:27 -0400927fail:
Steven Whitehouse7359a192006-02-13 12:27:43 +0000928 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000929}
930
931/**
David Teiglandb3b94fa2006-01-16 16:50:04 +0000932 * gfs2_rmdiri - Remove a directory
933 * @dip: The parent directory of the directory to be removed
934 * @name: The name of the directory to be removed
935 * @ip: The GFS2 inode of the directory to be removed
936 *
937 * Assumes Glocks on dip and ip are held
938 *
939 * Returns: errno
940 */
941
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400942int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
943 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000944{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000945 struct qstr dotname;
946 int error;
947
948 if (ip->i_di.di_entries != 2) {
949 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500950 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000951 return -EIO;
952 }
953
954 error = gfs2_dir_del(dip, name);
955 if (error)
956 return error;
957
958 error = gfs2_change_nlink(dip, -1);
959 if (error)
960 return error;
961
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500962 gfs2_str2qstr(&dotname, ".");
David Teiglandb3b94fa2006-01-16 16:50:04 +0000963 error = gfs2_dir_del(ip, &dotname);
964 if (error)
965 return error;
966
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400967 gfs2_str2qstr(&dotname, "..");
David Teiglandb3b94fa2006-01-16 16:50:04 +0000968 error = gfs2_dir_del(ip, &dotname);
969 if (error)
970 return error;
971
Steven Whitehouse4f561102006-11-01 14:04:17 -0500972 /* It looks odd, but it really should be done twice */
973 error = gfs2_change_nlink(ip, -1);
974 if (error)
975 return error;
976
977 error = gfs2_change_nlink(ip, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000978 if (error)
979 return error;
980
David Teiglandb3b94fa2006-01-16 16:50:04 +0000981 return error;
982}
983
984/*
985 * gfs2_unlink_ok - check to see that a inode is still in a directory
986 * @dip: the directory
987 * @name: the name of the file
988 * @ip: the inode
989 *
990 * Assumes that the lock on (at least) @dip is held.
991 *
992 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
993 */
994
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400995int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100996 const struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000997{
David Teiglandb3b94fa2006-01-16 16:50:04 +0000998 int error;
999
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001000 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001001 return -EPERM;
1002
Steven Whitehouseb60623c2006-11-01 12:22:46 -05001003 if ((dip->i_inode.i_mode & S_ISVTX) &&
Steven Whitehouse2933f922006-11-01 13:23:29 -05001004 dip->i_inode.i_uid != current->fsuid &&
1005 ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001006 return -EPERM;
1007
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001008 if (IS_APPEND(&dip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001009 return -EPERM;
1010
Steven Whitehousefaf450e2006-06-22 10:59:10 -04001011 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001012 if (error)
1013 return error;
1014
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001015 error = gfs2_dir_check(&dip->i_inode, name, ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001016 if (error)
1017 return error;
1018
David Teiglandb3b94fa2006-01-16 16:50:04 +00001019 return 0;
1020}
1021
1022/*
1023 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1024 * @this: move this
1025 * @to: to here
1026 *
1027 * Follow @to back to the root and make sure we don't encounter @this
1028 * Assumes we already hold the rename lock.
1029 *
1030 * Returns: errno
1031 */
1032
1033int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1034{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001035 struct inode *dir = &to->i_inode;
Steven Whitehousec9fd4302006-03-01 15:31:02 -05001036 struct super_block *sb = dir->i_sb;
Steven Whitehouse7359a192006-02-13 12:27:43 +00001037 struct inode *tmp;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001038 struct qstr dotdot;
1039 int error = 0;
1040
Steven Whitehouse71b86f52006-03-28 14:14:04 -05001041 gfs2_str2qstr(&dotdot, "..");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001042
Steven Whitehouse7359a192006-02-13 12:27:43 +00001043 igrab(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044
1045 for (;;) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001046 if (dir == &this->i_inode) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001047 error = -EINVAL;
1048 break;
1049 }
Steven Whitehousec9fd4302006-03-01 15:31:02 -05001050 if (dir == sb->s_root->d_inode) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001051 error = 0;
1052 break;
1053 }
1054
Steven Whitehousec7526662006-03-20 12:30:04 -05001055 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1056 if (IS_ERR(tmp)) {
1057 error = PTR_ERR(tmp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001058 break;
Steven Whitehousec7526662006-03-20 12:30:04 -05001059 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001060
Steven Whitehouse7359a192006-02-13 12:27:43 +00001061 iput(dir);
1062 dir = tmp;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001063 }
1064
Steven Whitehouse7359a192006-02-13 12:27:43 +00001065 iput(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001066
1067 return error;
1068}
1069
1070/**
1071 * gfs2_readlinki - return the contents of a symlink
1072 * @ip: the symlink's inode
1073 * @buf: a pointer to the buffer to be filled
1074 * @len: a pointer to the length of @buf
1075 *
1076 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1077 * to be freed by the caller.
1078 *
1079 * Returns: errno
1080 */
1081
1082int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1083{
1084 struct gfs2_holder i_gh;
1085 struct buffer_head *dibh;
1086 unsigned int x;
1087 int error;
1088
1089 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1090 error = gfs2_glock_nq_atime(&i_gh);
1091 if (error) {
1092 gfs2_holder_uninit(&i_gh);
1093 return error;
1094 }
1095
1096 if (!ip->i_di.di_size) {
1097 gfs2_consist_inode(ip);
1098 error = -EIO;
1099 goto out;
1100 }
1101
1102 error = gfs2_meta_inode_buffer(ip, &dibh);
1103 if (error)
1104 goto out;
1105
1106 x = ip->i_di.di_size + 1;
1107 if (x > *len) {
1108 *buf = kmalloc(x, GFP_KERNEL);
1109 if (!*buf) {
1110 error = -ENOMEM;
1111 goto out_brelse;
1112 }
1113 }
1114
1115 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1116 *len = x;
1117
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001118out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001119 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001120out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001121 gfs2_glock_dq_uninit(&i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001122 return error;
1123}
1124
1125/**
1126 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1127 * conditionally update the inode's atime
1128 * @gh: the holder to acquire
1129 *
1130 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1131 * Update if the difference between the current time and the inode's current
1132 * atime is greater than an interval specified at mount.
1133 *
1134 * Returns: errno
1135 */
1136
1137int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1138{
1139 struct gfs2_glock *gl = gh->gh_gl;
1140 struct gfs2_sbd *sdp = gl->gl_sbd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001141 struct gfs2_inode *ip = gl->gl_object;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001142 s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001143 unsigned int state;
1144 int flags;
1145 int error;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001146 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001147
1148 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1149 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1150 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1151 return -EINVAL;
1152
1153 state = gh->gh_state;
1154 flags = gh->gh_flags;
1155
1156 error = gfs2_glock_nq(gh);
1157 if (error)
1158 return error;
1159
1160 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1161 (sdp->sd_vfs->s_flags & MS_RDONLY))
1162 return 0;
1163
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001164 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001165 gfs2_glock_dq(gh);
Steven Whitehousefd88de562006-05-05 16:59:11 -04001166 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1167 gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001168 error = gfs2_glock_nq(gh);
1169 if (error)
1170 return error;
1171
1172 /* Verify that atime hasn't been updated while we were
1173 trying to get exclusive lock. */
1174
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001175 tv = CURRENT_TIME;
1176 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001177 struct buffer_head *dibh;
Steven Whitehouse48516ce2006-10-02 12:39:19 -04001178 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001179
1180 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1181 if (error == -EROFS)
1182 return 0;
1183 if (error)
1184 goto fail;
1185
1186 error = gfs2_meta_inode_buffer(ip, &dibh);
1187 if (error)
1188 goto fail_end_trans;
1189
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001190 ip->i_inode.i_atime = tv;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001191
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001192 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse48516ce2006-10-02 12:39:19 -04001193 di = (struct gfs2_dinode *)dibh->b_data;
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -05001194 di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001195 di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001196 brelse(dibh);
1197
1198 gfs2_trans_end(sdp);
1199 }
1200
1201 /* If someone else has asked for the glock,
1202 unlock and let them have it. Then reacquire
1203 in the original state. */
1204 if (gfs2_glock_is_blocking(gl)) {
1205 gfs2_glock_dq(gh);
1206 gfs2_holder_reinit(state, flags, gh);
1207 return gfs2_glock_nq(gh);
1208 }
1209 }
1210
1211 return 0;
1212
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001213fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001214 gfs2_trans_end(sdp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001215fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001216 gfs2_glock_dq(gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001217 return error;
1218}
1219
David Teiglandb3b94fa2006-01-16 16:50:04 +00001220static int
1221__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1222{
1223 struct buffer_head *dibh;
1224 int error;
1225
1226 error = gfs2_meta_inode_buffer(ip, &dibh);
1227 if (!error) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001228 error = inode_setattr(&ip->i_inode, attr);
1229 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001230 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001231 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001232 brelse(dibh);
1233 }
1234 return error;
1235}
1236
1237/**
1238 * gfs2_setattr_simple -
1239 * @ip:
1240 * @attr:
1241 *
1242 * Called with a reference on the vnode.
1243 *
1244 * Returns: errno
1245 */
1246
1247int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1248{
1249 int error;
1250
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001251 if (current->journal_info)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001252 return __gfs2_setattr_simple(ip, attr);
1253
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001254 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001255 if (error)
1256 return error;
1257
1258 error = __gfs2_setattr_simple(ip, attr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001259 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001260 return error;
1261}
1262
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001263void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
1264{
1265 const struct gfs2_dinode_host *di = &ip->i_di;
1266 struct gfs2_dinode *str = buf;
1267
1268 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
1269 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
1270 str->di_header.__pad0 = 0;
1271 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
1272 str->di_header.__pad1 = 0;
1273 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
1274 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
1275 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
1276 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
1277 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
1278 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
1279 str->di_size = cpu_to_be64(di->di_size);
1280 str->di_blocks = cpu_to_be64(di->di_blocks);
1281 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1282 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
1283 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
1284
1285 str->di_goal_meta = cpu_to_be64(di->di_goal_meta);
1286 str->di_goal_data = cpu_to_be64(di->di_goal_data);
1287 str->di_generation = cpu_to_be64(di->di_generation);
1288
1289 str->di_flags = cpu_to_be32(di->di_flags);
1290 str->di_height = cpu_to_be16(di->di_height);
1291 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
1292 !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
1293 GFS2_FORMAT_DE : 0);
1294 str->di_depth = cpu_to_be16(di->di_depth);
1295 str->di_entries = cpu_to_be32(di->di_entries);
1296
1297 str->di_eattr = cpu_to_be64(di->di_eattr);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001298 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1299 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
1300 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001301}
1302
1303void gfs2_dinode_print(const struct gfs2_inode *ip)
1304{
1305 const struct gfs2_dinode_host *di = &ip->i_di;
1306
1307 printk(KERN_INFO " no_formal_ino = %llu\n",
1308 (unsigned long long)ip->i_no_formal_ino);
1309 printk(KERN_INFO " no_addr = %llu\n",
1310 (unsigned long long)ip->i_no_addr);
1311 printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
1312 printk(KERN_INFO " di_blocks = %llu\n",
1313 (unsigned long long)di->di_blocks);
1314 printk(KERN_INFO " di_goal_meta = %llu\n",
1315 (unsigned long long)di->di_goal_meta);
1316 printk(KERN_INFO " di_goal_data = %llu\n",
1317 (unsigned long long)di->di_goal_data);
1318 printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
1319 printk(KERN_INFO " di_height = %u\n", di->di_height);
1320 printk(KERN_INFO " di_depth = %u\n", di->di_depth);
1321 printk(KERN_INFO " di_entries = %u\n", di->di_entries);
1322 printk(KERN_INFO " di_eattr = %llu\n",
1323 (unsigned long long)di->di_eattr);
1324}
1325