blob: 7cee695fa44163f378293945514b1e4a9bbfd084 [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +00001/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Petersonca390602008-01-28 11:15:57 -06003 * Copyright (C) 2004-2008 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>
Steven Whitehouse719ee342008-09-18 13:53:59 +010021#include <linux/time.h>
David Teiglandb3b94fa2006-01-16 16:50:04 +000022
23#include "gfs2.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050024#include "incore.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000025#include "acl.h"
26#include "bmap.h"
27#include "dir.h"
28#include "eattr.h"
29#include "glock.h"
30#include "glops.h"
31#include "inode.h"
32#include "log.h"
33#include "meta_io.h"
34#include "ops_address.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000035#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
Bob Peterson091806e2008-04-29 12:35:48 -050051 if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags))
David Teiglandb3b94fa2006-01-16 16:50:04 +000052 return 1;
53
54 return 0;
55}
56
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040057static int iget_set(struct inode *inode, void *opaque)
58{
59 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010060 u64 *no_addr = opaque;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040061
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010062 inode->i_ino = (unsigned long)*no_addr;
63 ip->i_no_addr = *no_addr;
Bob Peterson091806e2008-04-29 12:35:48 -050064 set_bit(GIF_USER, &ip->i_flags);
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
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -050080struct gfs2_skip_data {
81 u64 no_addr;
82 int skipped;
83};
84
85static int iget_skip_test(struct inode *inode, void *opaque)
86{
87 struct gfs2_inode *ip = GFS2_I(inode);
88 struct gfs2_skip_data *data = opaque;
89
Bob Peterson091806e2008-04-29 12:35:48 -050090 if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -050091 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
92 data->skipped = 1;
93 return 0;
94 }
95 return 1;
96 }
97 return 0;
98}
99
100static int iget_skip_set(struct inode *inode, void *opaque)
101{
102 struct gfs2_inode *ip = GFS2_I(inode);
103 struct gfs2_skip_data *data = opaque;
104
105 if (data->skipped)
106 return 1;
107 inode->i_ino = (unsigned long)(data->no_addr);
108 ip->i_no_addr = data->no_addr;
Bob Peterson091806e2008-04-29 12:35:48 -0500109 set_bit(GIF_USER, &ip->i_flags);
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500110 return 0;
111}
112
113static struct inode *gfs2_iget_skip(struct super_block *sb,
114 u64 no_addr)
115{
116 struct gfs2_skip_data data;
117 unsigned long hash = (unsigned long)no_addr;
118
119 data.no_addr = no_addr;
120 data.skipped = 0;
121 return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
122}
123
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400124/**
Wendy Cheng35dcc522007-06-27 17:07:53 -0400125 * GFS2 lookup code fills in vfs inode contents based on info obtained
126 * from directory entry inside gfs2_inode_lookup(). This has caused issues
127 * with NFS code path since its get_dentry routine doesn't have the relevant
128 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
129 * segment inside gfs2_inode_lookup code needs to get moved around.
130 *
131 * Clean up I_LOCK and I_NEW as well.
132 **/
133
134void gfs2_set_iop(struct inode *inode)
135{
Wendy Chengc97bfe42007-11-29 17:56:51 -0500136 struct gfs2_sbd *sdp = GFS2_SB(inode);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400137 umode_t mode = inode->i_mode;
138
139 if (S_ISREG(mode)) {
140 inode->i_op = &gfs2_file_iops;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500141 if (sdp->sd_args.ar_localflocks)
142 inode->i_fop = &gfs2_file_fops_nolock;
143 else
144 inode->i_fop = &gfs2_file_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400145 } else if (S_ISDIR(mode)) {
146 inode->i_op = &gfs2_dir_iops;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500147 if (sdp->sd_args.ar_localflocks)
148 inode->i_fop = &gfs2_dir_fops_nolock;
149 else
150 inode->i_fop = &gfs2_dir_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400151 } else if (S_ISLNK(mode)) {
152 inode->i_op = &gfs2_symlink_iops;
153 } else {
Denis Chengd83225d2008-02-26 15:25:03 +0800154 inode->i_op = &gfs2_file_iops;
Denis Cheng43a33c52008-02-26 15:25:04 +0800155 init_special_inode(inode, inode->i_mode, inode->i_rdev);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400156 }
157
158 unlock_new_inode(inode);
159}
160
161/**
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400162 * gfs2_inode_lookup - Lookup an inode
163 * @sb: The super block
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100164 * @no_addr: The inode number
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400165 * @type: The type of the inode
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500166 * @skip_freeing: set this not return an inode if it is currently being freed.
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400167 *
168 * Returns: A VFS inode, or an error
169 */
170
Bob Peterson091806e2008-04-29 12:35:48 -0500171struct inode *gfs2_inode_lookup(struct super_block *sb,
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400172 unsigned int type,
173 u64 no_addr,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500174 u64 no_formal_ino, int skip_freeing)
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400175{
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500176 struct inode *inode;
177 struct gfs2_inode *ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400178 struct gfs2_glock *io_gl;
179 int error;
180
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500181 if (skip_freeing)
182 inode = gfs2_iget_skip(sb, no_addr);
183 else
184 inode = gfs2_iget(sb, no_addr);
185 ip = GFS2_I(inode);
186
Steven Whitehouse26d83de2006-10-30 16:59:08 -0500187 if (!inode)
188 return ERR_PTR(-ENOBUFS);
189
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400190 if (inode->i_state & I_NEW) {
191 struct gfs2_sbd *sdp = GFS2_SB(inode);
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400192 ip->i_no_formal_ino = no_formal_ino;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400193
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100194 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400195 if (unlikely(error))
196 goto fail;
197 ip->i_gl->gl_object = ip;
198
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100199 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400200 if (unlikely(error))
201 goto fail_put;
202
Steven Whitehousebfded272006-11-01 16:05:38 -0500203 set_bit(GIF_INVALID, &ip->i_flags);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400204 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
205 if (unlikely(error))
206 goto fail_iopen;
Abhijith Dasd93cfa92007-06-11 08:22:32 +0100207 ip->i_iopen_gh.gh_gl->gl_object = ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400208
209 gfs2_glock_put(io_gl);
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100210
Wendy Cheng35dcc522007-06-27 17:07:53 -0400211 if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
212 goto gfs2_nfsbypass;
213
214 inode->i_mode = DT2IF(type);
215
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100216 /*
217 * We must read the inode in order to work out its type in
218 * this case. Note that this doesn't happen often as we normally
219 * know the type beforehand. This code path only occurs during
220 * unlinked inode recovery (where it is safe to do this glock,
221 * which is not true in the general case).
222 */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100223 if (type == DT_UNKNOWN) {
224 struct gfs2_holder gh;
225 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
226 if (unlikely(error))
227 goto fail_glock;
228 /* Inode is now uptodate */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100229 gfs2_glock_dq_uninit(&gh);
230 }
231
Wendy Cheng35dcc522007-06-27 17:07:53 -0400232 gfs2_set_iop(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000233 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400234
Wendy Cheng35dcc522007-06-27 17:07:53 -0400235gfs2_nfsbypass:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400236 return inode;
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100237fail_glock:
238 gfs2_glock_dq(&ip->i_iopen_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400239fail_iopen:
240 gfs2_glock_put(io_gl);
241fail_put:
242 ip->i_gl->gl_object = NULL;
243 gfs2_glock_put(ip->i_gl);
244fail:
David Howells69840b02008-02-07 00:15:29 -0800245 iget_failed(inode);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400246 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000247}
248
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500249static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
Steven Whitehouseea744d02006-10-31 15:28:00 -0500250{
251 struct gfs2_dinode_host *di = &ip->i_di;
252 const struct gfs2_dinode *str = buf;
Steven Whitehouse719ee342008-09-18 13:53:59 +0100253 struct timespec atime;
Steven Whitehouse9a004502008-02-01 09:23:44 +0000254 u16 height, depth;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500255
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000256 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
257 goto corrupt;
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100258 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500259 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500260 ip->i_inode.i_rdev = 0;
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500261 switch (ip->i_inode.i_mode & S_IFMT) {
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500262 case S_IFBLK:
263 case S_IFCHR:
264 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
265 be32_to_cpu(str->di_minor));
266 break;
267 };
268
Steven Whitehouse2933f922006-11-01 13:23:29 -0500269 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
270 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
Steven Whitehouse4f561102006-11-01 14:04:17 -0500271 /*
272 * We will need to review setting the nlink count here in the
273 * light of the forthcoming ro bind mount work. This is a reminder
274 * to do that.
275 */
276 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500277 di->di_size = be64_to_cpu(str->di_size);
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -0500278 i_size_write(&ip->i_inode, di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000279 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
Steven Whitehouse719ee342008-09-18 13:53:59 +0100280 atime.tv_sec = be64_to_cpu(str->di_atime);
281 atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
282 if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
283 ip->i_inode.i_atime = atime;
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500284 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100285 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500286 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100287 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500288
Steven Whitehousece276b02008-02-06 09:25:45 +0000289 ip->i_goal = be64_to_cpu(str->di_goal_meta);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500290 di->di_generation = be64_to_cpu(str->di_generation);
291
292 di->di_flags = be32_to_cpu(str->di_flags);
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500293 gfs2_set_inode_flags(&ip->i_inode);
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000294 height = be16_to_cpu(str->di_height);
295 if (unlikely(height > GFS2_MAX_META_HEIGHT))
296 goto corrupt;
297 ip->i_height = (u8)height;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500298
Steven Whitehouse9a004502008-02-01 09:23:44 +0000299 depth = be16_to_cpu(str->di_depth);
300 if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
301 goto corrupt;
302 ip->i_depth = (u8)depth;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500303 di->di_entries = be32_to_cpu(str->di_entries);
304
305 di->di_eattr = be64_to_cpu(str->di_eattr);
Steven Whitehouse55610932007-10-17 08:47:38 +0100306 if (S_ISREG(ip->i_inode.i_mode))
307 gfs2_set_aops(&ip->i_inode);
308
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500309 return 0;
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000310corrupt:
311 if (gfs2_consist_inode(ip))
312 gfs2_dinode_print(ip);
313 return -EIO;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500314}
315
David Teiglandb3b94fa2006-01-16 16:50:04 +0000316/**
317 * gfs2_inode_refresh - Refresh the incore copy of the dinode
318 * @ip: The GFS2 inode
319 *
320 * Returns: errno
321 */
322
323int gfs2_inode_refresh(struct gfs2_inode *ip)
324{
325 struct buffer_head *dibh;
326 int error;
327
328 error = gfs2_meta_inode_buffer(ip, &dibh);
329 if (error)
330 return error;
331
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400332 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000333 brelse(dibh);
334 return -EIO;
335 }
336
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500337 error = gfs2_dinode_in(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000338 brelse(dibh);
Steven Whitehousebfded272006-11-01 16:05:38 -0500339 clear_bit(GIF_INVALID, &ip->i_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000340
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500341 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000342}
343
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400344int gfs2_dinode_dealloc(struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000345{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400346 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000347 struct gfs2_alloc *al;
348 struct gfs2_rgrpd *rgd;
349 int error;
350
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000351 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000352 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500353 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000354 return -EIO;
355 }
356
357 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300358 if (!al)
359 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000360
361 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
362 if (error)
363 goto out;
364
365 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
366 if (error)
367 goto out_qs;
368
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100369 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000370 if (!rgd) {
371 gfs2_consist_inode(ip);
372 error = -EIO;
373 goto out_rindex_relse;
374 }
375
376 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
377 &al->al_rgd_gh);
378 if (error)
379 goto out_rindex_relse;
380
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400381 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000382 if (error)
383 goto out_rg_gunlock;
384
Steven Whitehouse2bcd6102007-11-08 14:25:12 +0000385 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
386 set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000387
388 gfs2_free_di(rgd, ip);
389
David Teiglandb3b94fa2006-01-16 16:50:04 +0000390 gfs2_trans_end(sdp);
391 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
392
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400393out_rg_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000394 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400395out_rindex_relse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000396 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400397out_qs:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000398 gfs2_quota_unhold(ip);
Steven Whitehouse36327522006-04-28 10:46:21 -0400399out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400400 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000401 return error;
402}
403
404/**
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500405 * gfs2_change_nlink - Change nlink count on inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000406 * @ip: The GFS2 inode
407 * @diff: The change in the nlink count required
408 *
409 * Returns: errno
410 */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500411int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000412{
413 struct buffer_head *dibh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400414 u32 nlink;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000415 int error;
416
Steven Whitehouse4f561102006-11-01 14:04:17 -0500417 BUG_ON(diff != 1 && diff != -1);
418 nlink = ip->i_inode.i_nlink + diff;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000419
420 /* If we are reducing the nlink count, but the new value ends up being
421 bigger than the old one, we must have underflowed. */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500422 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000423 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500424 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000425 return -EIO;
426 }
427
428 error = gfs2_meta_inode_buffer(ip, &dibh);
429 if (error)
430 return error;
431
Steven Whitehouse4f561102006-11-01 14:04:17 -0500432 if (diff > 0)
433 inc_nlink(&ip->i_inode);
434 else
435 drop_nlink(&ip->i_inode);
436
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100437 ip->i_inode.i_ctime = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000438
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000439 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500440 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000441 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400442 mark_inode_dirty(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000443
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500444 if (ip->i_inode.i_nlink == 0)
Russell Cattelanddee7602007-01-29 17:13:44 -0600445 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500446
S. Wendy Cheng55098262007-01-18 15:56:34 -0500447 return error;
448}
449
Steven Whitehousec7526662006-03-20 12:30:04 -0500450struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
451{
452 struct qstr qstr;
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600453 struct inode *inode;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500454 gfs2_str2qstr(&qstr, name);
Al Viroa569c712008-07-23 14:42:05 -0400455 inode = gfs2_lookupi(dip, &qstr, 1);
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600456 /* gfs2_lookupi has inconsistent callers: vfs
457 * related routines expect NULL for no entry found,
458 * gfs2_lookup_simple callers expect ENOENT
459 * and do not check for NULL.
460 */
461 if (inode == NULL)
462 return ERR_PTR(-ENOENT);
463 else
464 return inode;
Steven Whitehousec7526662006-03-20 12:30:04 -0500465}
466
467
David Teiglandb3b94fa2006-01-16 16:50:04 +0000468/**
469 * gfs2_lookupi - Look up a filename in a directory and return its inode
470 * @d_gh: An initialized holder for the directory glock
471 * @name: The name of the inode to look for
472 * @is_root: If 1, ignore the caller's permissions
473 * @i_gh: An uninitialized holder for the new inode glock
474 *
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000475 * This can be called via the VFS filldir function when NFS is doing
476 * a readdirplus and the inode which its intending to stat isn't
477 * already in cache. In this case we must not take the directory glock
478 * again, since the readdir call will have already taken that lock.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000479 *
480 * Returns: errno
481 */
482
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400483struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
Al Viroa569c712008-07-23 14:42:05 -0400484 int is_root)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000485{
Steven Whitehousec9fd4302006-03-01 15:31:02 -0500486 struct super_block *sb = dir->i_sb;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400487 struct gfs2_inode *dip = GFS2_I(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000488 struct gfs2_holder d_gh;
akpm@linux-foundation.org037bcbb2007-06-08 16:42:14 -0700489 int error = 0;
Steven Whitehousec7526662006-03-20 12:30:04 -0500490 struct inode *inode = NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000491 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000492
493 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehousec7526662006-03-20 12:30:04 -0500494 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000495
Steven Whitehousec7526662006-03-20 12:30:04 -0500496 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
497 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
498 dir == sb->s_root->d_inode)) {
Steven Whitehouse320dd102006-05-18 16:25:27 -0400499 igrab(dir);
500 return dir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000501 }
502
Steven Whitehouse7afd88d2008-02-22 16:07:18 +0000503 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000504 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
505 if (error)
506 return ERR_PTR(error);
507 unlock = 1;
508 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000509
510 if (!is_root) {
Miklos Szeredif58ba882008-07-02 21:12:01 +0200511 error = gfs2_permission(dir, MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000512 if (error)
513 goto out;
514 }
515
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100516 inode = gfs2_dir_search(dir, name);
517 if (IS_ERR(inode))
518 error = PTR_ERR(inode);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000519out:
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000520 if (unlock)
521 gfs2_glock_dq_uninit(&d_gh);
Steven Whitehousec7526662006-03-20 12:30:04 -0500522 if (error == -ENOENT)
523 return NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000524 return inode ? inode : ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000525}
526
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100527static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
528{
529 const struct gfs2_inum_range *str = buf;
530
531 ir->ir_start = be64_to_cpu(str->ir_start);
532 ir->ir_length = be64_to_cpu(str->ir_length);
533}
534
535static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
536{
537 struct gfs2_inum_range *str = buf;
538
539 str->ir_start = cpu_to_be64(ir->ir_start);
540 str->ir_length = cpu_to_be64(ir->ir_length);
541}
542
Steven Whitehousecd915492006-09-04 12:49:07 -0400543static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400545 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000546 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400547 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000548 int error;
549
550 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
551 if (error)
552 return error;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000553 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000554
555 error = gfs2_meta_inode_buffer(ip, &bh);
556 if (error) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000557 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000558 gfs2_trans_end(sdp);
559 return error;
560 }
561
562 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
563
564 if (ir.ir_length) {
565 *formal_ino = ir.ir_start++;
566 ir.ir_length--;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000567 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000568 gfs2_inum_range_out(&ir,
569 bh->b_data + sizeof(struct gfs2_dinode));
570 brelse(bh);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000571 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000572 gfs2_trans_end(sdp);
573 return 0;
574 }
575
576 brelse(bh);
577
Steven Whitehousef55ab262006-02-21 12:51:39 +0000578 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000579 gfs2_trans_end(sdp);
580
581 return 1;
582}
583
Steven Whitehousecd915492006-09-04 12:49:07 -0400584static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000585{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400586 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
587 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000588 struct gfs2_holder gh;
589 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400590 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591 int error;
592
593 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
594 if (error)
595 return error;
596
597 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
598 if (error)
599 goto out;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000600 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000601
602 error = gfs2_meta_inode_buffer(ip, &bh);
603 if (error)
604 goto out_end_trans;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400605
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
607
608 if (!ir.ir_length) {
609 struct buffer_head *m_bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400610 u64 x, y;
Al Virob44b84d2006-10-14 10:46:30 -0400611 __be64 z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000612
613 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
614 if (error)
615 goto out_brelse;
616
Al Virob44b84d2006-10-14 10:46:30 -0400617 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
618 x = y = be64_to_cpu(z);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000619 ir.ir_start = x;
620 ir.ir_length = GFS2_INUM_QUANTUM;
621 x += GFS2_INUM_QUANTUM;
622 if (x < y)
623 gfs2_consist_inode(m_ip);
Al Virob44b84d2006-10-14 10:46:30 -0400624 z = cpu_to_be64(x);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000625 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
Al Virob44b84d2006-10-14 10:46:30 -0400626 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000627
628 brelse(m_bh);
629 }
630
631 *formal_ino = ir.ir_start++;
632 ir.ir_length--;
633
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000634 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000635 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
636
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400637out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000638 brelse(bh);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400639out_end_trans:
Steven Whitehousef55ab262006-02-21 12:51:39 +0000640 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000641 gfs2_trans_end(sdp);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400642out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000643 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000644 return error;
645}
646
Steven Whitehousecd915492006-09-04 12:49:07 -0400647static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000648{
649 int error;
650
651 error = pick_formal_ino_1(sdp, inum);
652 if (error <= 0)
653 return error;
654
655 error = pick_formal_ino_2(sdp, inum);
656
657 return error;
658}
659
660/**
661 * create_ok - OK to create a new on-disk inode here?
662 * @dip: Directory in which dinode is to be created
663 * @name: Name of new dinode
664 * @mode:
665 *
666 * Returns: errno
667 */
668
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400669static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000670 unsigned int mode)
671{
672 int error;
673
Miklos Szeredif58ba882008-07-02 21:12:01 +0200674 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000675 if (error)
676 return error;
677
678 /* Don't create entries in an unlinked directory */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500679 if (!dip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000680 return -EPERM;
681
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100682 error = gfs2_dir_check(&dip->i_inode, name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000683 switch (error) {
684 case -ENOENT:
685 error = 0;
686 break;
687 case 0:
688 return -EEXIST;
689 default:
690 return error;
691 }
692
Steven Whitehousecd915492006-09-04 12:49:07 -0400693 if (dip->i_di.di_entries == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000694 return -EFBIG;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500695 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000696 return -EMLINK;
697
698 return 0;
699}
700
701static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
702 unsigned int *uid, unsigned int *gid)
703{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400704 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
Steven Whitehouse2933f922006-11-01 13:23:29 -0500705 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000706 if (S_ISDIR(*mode))
707 *mode |= S_ISUID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500708 else if (dip->i_inode.i_uid != current->fsuid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000709 *mode &= ~07111;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500710 *uid = dip->i_inode.i_uid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000711 } else
712 *uid = current->fsuid;
713
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500714 if (dip->i_inode.i_mode & S_ISGID) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000715 if (S_ISDIR(*mode))
716 *mode |= S_ISGID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500717 *gid = dip->i_inode.i_gid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000718 } else
719 *gid = current->fsgid;
720}
721
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100722static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000723{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400724 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000725 int error;
726
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000727 if (gfs2_alloc_get(dip) == NULL)
728 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000729
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000730 dip->i_alloc->al_requested = RES_DINODE;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000731 error = gfs2_inplace_reserve(dip);
732 if (error)
733 goto out;
734
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400735 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000736 if (error)
737 goto out_ipreserv;
738
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100739 *no_addr = gfs2_alloc_di(dip, generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000740
741 gfs2_trans_end(sdp);
742
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400743out_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000744 gfs2_inplace_release(dip);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400745out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000746 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000747 return error;
748}
749
750/**
751 * init_dinode - Fill in a new dinode structure
752 * @dip: the directory this inode is being created in
753 * @gl: The glock covering the new inode
754 * @inum: the inode number
755 * @mode: the file permissions
756 * @uid:
757 * @gid:
758 *
759 */
760
761static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400762 const struct gfs2_inum_host *inum, unsigned int mode,
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400763 unsigned int uid, unsigned int gid,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400764 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000765{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400766 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000767 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000768 struct buffer_head *dibh;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100769 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000770
771 dibh = gfs2_meta_new(gl, inum->no_addr);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000772 gfs2_trans_add_bh(gl, dibh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000773 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
774 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000775 di = (struct gfs2_dinode *)dibh->b_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000776
Steven Whitehouse2442a092006-01-30 11:49:32 +0000777 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
778 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000779 di->di_mode = cpu_to_be32(mode);
780 di->di_uid = cpu_to_be32(uid);
781 di->di_gid = cpu_to_be32(gid);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500782 di->di_nlink = 0;
783 di->di_size = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000784 di->di_blocks = cpu_to_be64(1);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100785 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500786 di->di_major = cpu_to_be32(MAJOR(dev));
787 di->di_minor = cpu_to_be32(MINOR(dev));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000788 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400789 di->di_generation = cpu_to_be64(*generation);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500790 di->di_flags = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000791
792 if (S_ISREG(mode)) {
793 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
794 gfs2_tune_get(sdp, gt_new_files_jdata))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000795 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000796 } else if (S_ISDIR(mode)) {
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500797 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500798 GFS2_DIF_INHERIT_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000799 }
800
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000801 di->__pad1 = 0;
Steven Whitehousea9583c72006-11-01 20:09:14 -0500802 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500803 di->di_height = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000804 di->__pad2 = 0;
805 di->__pad3 = 0;
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500806 di->di_depth = 0;
807 di->di_entries = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000808 memset(&di->__pad4, 0, sizeof(di->__pad4));
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500809 di->di_eattr = 0;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100810 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
811 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
812 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000813 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400814
815 set_buffer_uptodate(dibh);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000816
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400817 *bhp = dibh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000818}
819
820static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400821 unsigned int mode, const struct gfs2_inum_host *inum,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400822 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000823{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400824 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000825 unsigned int uid, gid;
826 int error;
827
828 munge_mode_uid_gid(dip, &mode, &uid, &gid);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300829 if (!gfs2_alloc_get(dip))
830 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000831
832 error = gfs2_quota_lock(dip, uid, gid);
833 if (error)
834 goto out;
835
836 error = gfs2_quota_check(dip, uid, gid);
837 if (error)
838 goto out_quota;
839
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400840 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000841 if (error)
842 goto out_quota;
843
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400844 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000845 gfs2_quota_change(dip, +1, uid, gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000846 gfs2_trans_end(sdp);
847
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400848out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000849 gfs2_quota_unlock(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400850out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000851 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000852 return error;
853}
854
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400855static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
856 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000857{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400858 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000859 struct gfs2_alloc *al;
860 int alloc_required;
861 struct buffer_head *dibh;
862 int error;
863
864 al = gfs2_alloc_get(dip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300865 if (!al)
866 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000867
868 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
869 if (error)
870 goto fail;
871
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400872 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
Steven Whitehousec7526662006-03-20 12:30:04 -0500873 if (alloc_required < 0)
Bob Peterson1b8177e2008-01-19 21:50:24 -0600874 goto fail_quota_locks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000875 if (alloc_required) {
Steven Whitehouse2933f922006-11-01 13:23:29 -0500876 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000877 if (error)
878 goto fail_quota_locks;
879
880 al->al_requested = sdp->sd_max_dirres;
881
882 error = gfs2_inplace_reserve(dip);
883 if (error)
884 goto fail_quota_locks;
885
Steven Whitehouse320dd102006-05-18 16:25:27 -0400886 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100887 al->al_rgd->rd_length +
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400888 2 * RES_DINODE +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000889 RES_STATFS + RES_QUOTA, 0);
890 if (error)
891 goto fail_ipreserv;
892 } else {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400893 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000894 if (error)
895 goto fail_quota_locks;
896 }
897
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100898 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000899 if (error)
900 goto fail_end_trans;
901
902 error = gfs2_meta_inode_buffer(ip, &dibh);
903 if (error)
904 goto fail_end_trans;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500905 ip->i_inode.i_nlink = 1;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000906 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500907 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000908 brelse(dibh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000909 return 0;
910
Steven Whitehouse320dd102006-05-18 16:25:27 -0400911fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000912 gfs2_trans_end(sdp);
913
Steven Whitehouse320dd102006-05-18 16:25:27 -0400914fail_ipreserv:
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000915 if (dip->i_alloc->al_rgd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000916 gfs2_inplace_release(dip);
917
Steven Whitehouse320dd102006-05-18 16:25:27 -0400918fail_quota_locks:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000919 gfs2_quota_unlock(dip);
920
Steven Whitehouse320dd102006-05-18 16:25:27 -0400921fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000922 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000923 return error;
924}
925
Ryan O'Harafcb47e02006-10-03 11:57:35 -0400926static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
927{
928 int err;
929 size_t len;
930 void *value;
931 char *name;
932 struct gfs2_ea_request er;
933
934 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
935 &name, &value, &len);
936
937 if (err) {
938 if (err == -EOPNOTSUPP)
939 return 0;
940 return err;
941 }
942
943 memset(&er, 0, sizeof(struct gfs2_ea_request));
944
945 er.er_type = GFS2_EATYPE_SECURITY;
946 er.er_name = name;
947 er.er_data = value;
948 er.er_name_len = strlen(name);
949 er.er_data_len = len;
950
951 err = gfs2_ea_set_i(ip, &er);
952
953 kfree(value);
954 kfree(name);
955
956 return err;
957}
958
David Teiglandb3b94fa2006-01-16 16:50:04 +0000959/**
960 * gfs2_createi - Create a new inode
961 * @ghs: An array of two holders
962 * @name: The name of the new file
963 * @mode: the permissions on the new inode
964 *
965 * @ghs[0] is an initialized holder for the directory
966 * @ghs[1] is the holder for the inode lock
967 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000968 * If the return value is not NULL, the glocks on both the directory and the new
David Teiglandb3b94fa2006-01-16 16:50:04 +0000969 * file are held. A transaction has been started and an inplace reservation
970 * is held, as well.
971 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000972 * Returns: An inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000973 */
974
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400975struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500976 unsigned int mode, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000977{
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100978 struct inode *inode = NULL;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500979 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400980 struct inode *dir = &dip->i_inode;
981 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100982 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000983 int error;
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400984 u64 generation;
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100985 struct buffer_head *bh = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000986
987 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehouse7359a192006-02-13 12:27:43 +0000988 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000989
David Teiglandb3b94fa2006-01-16 16:50:04 +0000990 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
991 error = gfs2_glock_nq(ghs);
992 if (error)
993 goto fail;
994
995 error = create_ok(dip, name, mode);
996 if (error)
997 goto fail_gunlock;
998
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400999 error = pick_formal_ino(sdp, &inum.no_formal_ino);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001000 if (error)
1001 goto fail_gunlock;
1002
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001003 error = alloc_dinode(dip, &inum.no_addr, &generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001004 if (error)
1005 goto fail_gunlock;
1006
Steven Whitehouse28626e22006-11-22 11:13:21 -05001007 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
1008 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
1009 if (error)
1010 goto fail_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001011
Wendy Chenge9bd2b32007-08-24 09:15:01 -04001012 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001013 if (error)
1014 goto fail_gunlock2;
1015
Wendy Chengbb9bcf02007-06-27 17:07:08 -04001016 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
1017 inum.no_addr,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -05001018 inum.no_formal_ino, 0);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001019 if (IS_ERR(inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001020 goto fail_gunlock2;
1021
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001022 error = gfs2_inode_refresh(GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001023 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001024 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001025
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001026 error = gfs2_acl_create(dip, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001027 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001028 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001029
Ryan O'Harafcb47e02006-10-03 11:57:35 -04001030 error = gfs2_security_init(dip, GFS2_I(inode));
1031 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001032 goto fail_gunlock2;
Ryan O'Harafcb47e02006-10-03 11:57:35 -04001033
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001034 error = link_dinode(dip, name, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001035 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001036 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001037
Steven Whitehousef91a0d32007-10-15 16:29:05 +01001038 if (bh)
1039 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +00001040 return inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001041
Steven Whitehouse320dd102006-05-18 16:25:27 -04001042fail_gunlock2:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001043 gfs2_glock_dq_uninit(ghs + 1);
Julien Brunelbd1eb882008-09-01 10:51:22 +02001044 if (inode && !IS_ERR(inode))
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001045 iput(inode);
Steven Whitehouse320dd102006-05-18 16:25:27 -04001046fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001047 gfs2_glock_dq(ghs);
Steven Whitehouse320dd102006-05-18 16:25:27 -04001048fail:
Steven Whitehousef91a0d32007-10-15 16:29:05 +01001049 if (bh)
1050 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +00001051 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001052}
1053
1054/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001055 * gfs2_rmdiri - Remove a directory
1056 * @dip: The parent directory of the directory to be removed
1057 * @name: The name of the directory to be removed
1058 * @ip: The GFS2 inode of the directory to be removed
1059 *
1060 * Assumes Glocks on dip and ip are held
1061 *
1062 * Returns: errno
1063 */
1064
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001065int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
1066 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001067{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001068 struct qstr dotname;
1069 int error;
1070
1071 if (ip->i_di.di_entries != 2) {
1072 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -05001073 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001074 return -EIO;
1075 }
1076
1077 error = gfs2_dir_del(dip, name);
1078 if (error)
1079 return error;
1080
1081 error = gfs2_change_nlink(dip, -1);
1082 if (error)
1083 return error;
1084
Steven Whitehouse71b86f52006-03-28 14:14:04 -05001085 gfs2_str2qstr(&dotname, ".");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001086 error = gfs2_dir_del(ip, &dotname);
1087 if (error)
1088 return error;
1089
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001090 gfs2_str2qstr(&dotname, "..");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001091 error = gfs2_dir_del(ip, &dotname);
1092 if (error)
1093 return error;
1094
Steven Whitehouse4f561102006-11-01 14:04:17 -05001095 /* It looks odd, but it really should be done twice */
1096 error = gfs2_change_nlink(ip, -1);
1097 if (error)
1098 return error;
1099
1100 error = gfs2_change_nlink(ip, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001101 if (error)
1102 return error;
1103
David Teiglandb3b94fa2006-01-16 16:50:04 +00001104 return error;
1105}
1106
1107/*
1108 * gfs2_unlink_ok - check to see that a inode is still in a directory
1109 * @dip: the directory
1110 * @name: the name of the file
1111 * @ip: the inode
1112 *
1113 * Assumes that the lock on (at least) @dip is held.
1114 *
1115 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1116 */
1117
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001118int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001119 const struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001120{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001121 int error;
1122
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001123 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001124 return -EPERM;
1125
Steven Whitehouseb60623c2006-11-01 12:22:46 -05001126 if ((dip->i_inode.i_mode & S_ISVTX) &&
Steven Whitehouse2933f922006-11-01 13:23:29 -05001127 dip->i_inode.i_uid != current->fsuid &&
1128 ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001129 return -EPERM;
1130
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001131 if (IS_APPEND(&dip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001132 return -EPERM;
1133
Miklos Szeredif58ba882008-07-02 21:12:01 +02001134 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001135 if (error)
1136 return error;
1137
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001138 error = gfs2_dir_check(&dip->i_inode, name, ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001139 if (error)
1140 return error;
1141
David Teiglandb3b94fa2006-01-16 16:50:04 +00001142 return 0;
1143}
1144
David Teiglandb3b94fa2006-01-16 16:50:04 +00001145/**
1146 * gfs2_readlinki - return the contents of a symlink
1147 * @ip: the symlink's inode
1148 * @buf: a pointer to the buffer to be filled
1149 * @len: a pointer to the length of @buf
1150 *
1151 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1152 * to be freed by the caller.
1153 *
1154 * Returns: errno
1155 */
1156
1157int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1158{
1159 struct gfs2_holder i_gh;
1160 struct buffer_head *dibh;
1161 unsigned int x;
1162 int error;
1163
Steven Whitehouse719ee342008-09-18 13:53:59 +01001164 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &i_gh);
1165 error = gfs2_glock_nq(&i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001166 if (error) {
1167 gfs2_holder_uninit(&i_gh);
1168 return error;
1169 }
1170
1171 if (!ip->i_di.di_size) {
1172 gfs2_consist_inode(ip);
1173 error = -EIO;
1174 goto out;
1175 }
1176
1177 error = gfs2_meta_inode_buffer(ip, &dibh);
1178 if (error)
1179 goto out;
1180
1181 x = ip->i_di.di_size + 1;
1182 if (x > *len) {
Josef Bacik16c5f062008-04-09 09:33:41 -04001183 *buf = kmalloc(x, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001184 if (!*buf) {
1185 error = -ENOMEM;
1186 goto out_brelse;
1187 }
1188 }
1189
1190 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1191 *len = x;
1192
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001193out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001194 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001195out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001196 gfs2_glock_dq_uninit(&i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001197 return error;
1198}
1199
David Teiglandb3b94fa2006-01-16 16:50:04 +00001200static int
1201__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1202{
1203 struct buffer_head *dibh;
1204 int error;
1205
1206 error = gfs2_meta_inode_buffer(ip, &dibh);
1207 if (!error) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001208 error = inode_setattr(&ip->i_inode, attr);
1209 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001210 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001211 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001212 brelse(dibh);
1213 }
1214 return error;
1215}
1216
1217/**
1218 * gfs2_setattr_simple -
1219 * @ip:
1220 * @attr:
1221 *
1222 * Called with a reference on the vnode.
1223 *
1224 * Returns: errno
1225 */
1226
1227int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1228{
1229 int error;
1230
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001231 if (current->journal_info)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001232 return __gfs2_setattr_simple(ip, attr);
1233
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001234 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001235 if (error)
1236 return error;
1237
1238 error = __gfs2_setattr_simple(ip, attr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001239 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001240 return error;
1241}
1242
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001243void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
1244{
1245 const struct gfs2_dinode_host *di = &ip->i_di;
1246 struct gfs2_dinode *str = buf;
1247
1248 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
1249 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
1250 str->di_header.__pad0 = 0;
1251 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
1252 str->di_header.__pad1 = 0;
1253 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
1254 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
1255 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
1256 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
1257 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
1258 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
1259 str->di_size = cpu_to_be64(di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001260 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001261 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1262 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
1263 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
1264
Steven Whitehousece276b02008-02-06 09:25:45 +00001265 str->di_goal_meta = cpu_to_be64(ip->i_goal);
1266 str->di_goal_data = cpu_to_be64(ip->i_goal);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001267 str->di_generation = cpu_to_be64(di->di_generation);
1268
1269 str->di_flags = cpu_to_be32(di->di_flags);
Steven Whitehouseecc30c72008-01-28 10:37:35 +00001270 str->di_height = cpu_to_be16(ip->i_height);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001271 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
1272 !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
1273 GFS2_FORMAT_DE : 0);
Steven Whitehouse9a004502008-02-01 09:23:44 +00001274 str->di_depth = cpu_to_be16(ip->i_depth);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001275 str->di_entries = cpu_to_be32(di->di_entries);
1276
1277 str->di_eattr = cpu_to_be64(di->di_eattr);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001278 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1279 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
1280 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001281}
1282
1283void gfs2_dinode_print(const struct gfs2_inode *ip)
1284{
1285 const struct gfs2_dinode_host *di = &ip->i_di;
1286
1287 printk(KERN_INFO " no_formal_ino = %llu\n",
1288 (unsigned long long)ip->i_no_formal_ino);
1289 printk(KERN_INFO " no_addr = %llu\n",
1290 (unsigned long long)ip->i_no_addr);
1291 printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001292 printk(KERN_INFO " blocks = %llu\n",
1293 (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousece276b02008-02-06 09:25:45 +00001294 printk(KERN_INFO " i_goal = %llu\n",
1295 (unsigned long long)ip->i_goal);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001296 printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
Bob Petersonca390602008-01-28 11:15:57 -06001297 printk(KERN_INFO " i_height = %u\n", ip->i_height);
Steven Whitehouse9a004502008-02-01 09:23:44 +00001298 printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001299 printk(KERN_INFO " di_entries = %u\n", di->di_entries);
1300 printk(KERN_INFO " di_eattr = %llu\n",
1301 (unsigned long long)di->di_eattr);
1302}
1303