blob: 3a9ef526c308be626b9a3470e27437d11240dab0 [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'Harafcb47e0b2006-10-03 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"
David Teiglandb3b94fa2006-01-16 16:50:04 +000034#include "ops_inode.h"
35#include "quota.h"
36#include "rgrp.h"
37#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050038#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000039
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010040struct gfs2_inum_range_host {
41 u64 ir_start;
42 u64 ir_length;
43};
44
David Teiglandb3b94fa2006-01-16 16:50:04 +000045static int iget_test(struct inode *inode, void *opaque)
46{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040047 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010048 u64 *no_addr = opaque;
David Teiglandb3b94fa2006-01-16 16:50:04 +000049
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010050 if (ip->i_no_addr == *no_addr &&
Steven Whitehouse1be38672007-03-01 10:00:53 +000051 inode->i_private != NULL)
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;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040064 return 0;
65}
66
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010067struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000068{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010069 unsigned long hash = (unsigned long)no_addr;
70 return ilookup5(sb, hash, iget_test, &no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +000071}
72
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010073static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000074{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010075 unsigned long hash = (unsigned long)no_addr;
76 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040077}
78
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -050079struct gfs2_skip_data {
80 u64 no_addr;
81 int skipped;
82};
83
84static int iget_skip_test(struct inode *inode, void *opaque)
85{
86 struct gfs2_inode *ip = GFS2_I(inode);
87 struct gfs2_skip_data *data = opaque;
88
89 if (ip->i_no_addr == data->no_addr && inode->i_private != NULL){
90 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
91 data->skipped = 1;
92 return 0;
93 }
94 return 1;
95 }
96 return 0;
97}
98
99static int iget_skip_set(struct inode *inode, void *opaque)
100{
101 struct gfs2_inode *ip = GFS2_I(inode);
102 struct gfs2_skip_data *data = opaque;
103
104 if (data->skipped)
105 return 1;
106 inode->i_ino = (unsigned long)(data->no_addr);
107 ip->i_no_addr = data->no_addr;
108 return 0;
109}
110
111static struct inode *gfs2_iget_skip(struct super_block *sb,
112 u64 no_addr)
113{
114 struct gfs2_skip_data data;
115 unsigned long hash = (unsigned long)no_addr;
116
117 data.no_addr = no_addr;
118 data.skipped = 0;
119 return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
120}
121
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400122/**
Wendy Cheng35dcc522007-06-27 17:07:53 -0400123 * GFS2 lookup code fills in vfs inode contents based on info obtained
124 * from directory entry inside gfs2_inode_lookup(). This has caused issues
125 * with NFS code path since its get_dentry routine doesn't have the relevant
126 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
127 * segment inside gfs2_inode_lookup code needs to get moved around.
128 *
129 * Clean up I_LOCK and I_NEW as well.
130 **/
131
132void gfs2_set_iop(struct inode *inode)
133{
Wendy Chengc97bfe42007-11-29 17:56:51 -0500134 struct gfs2_sbd *sdp = GFS2_SB(inode);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400135 umode_t mode = inode->i_mode;
136
137 if (S_ISREG(mode)) {
138 inode->i_op = &gfs2_file_iops;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500139 if (sdp->sd_args.ar_localflocks)
140 inode->i_fop = &gfs2_file_fops_nolock;
141 else
142 inode->i_fop = &gfs2_file_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400143 } else if (S_ISDIR(mode)) {
144 inode->i_op = &gfs2_dir_iops;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500145 if (sdp->sd_args.ar_localflocks)
146 inode->i_fop = &gfs2_dir_fops_nolock;
147 else
148 inode->i_fop = &gfs2_dir_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400149 } else if (S_ISLNK(mode)) {
150 inode->i_op = &gfs2_symlink_iops;
151 } else {
Denis Chengd83225d2008-02-26 15:25:03 +0800152 inode->i_op = &gfs2_file_iops;
Denis Cheng43a33c52008-02-26 15:25:04 +0800153 init_special_inode(inode, inode->i_mode, inode->i_rdev);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400154 }
155
156 unlock_new_inode(inode);
157}
158
159/**
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400160 * gfs2_inode_lookup - Lookup an inode
161 * @sb: The super block
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100162 * @no_addr: The inode number
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400163 * @type: The type of the inode
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500164 * @skip_freeing: set this not return an inode if it is currently being freed.
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400165 *
166 * Returns: A VFS inode, or an error
167 */
168
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400169struct inode *gfs2_inode_lookup(struct super_block *sb,
170 unsigned int type,
171 u64 no_addr,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500172 u64 no_formal_ino, int skip_freeing)
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400173{
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500174 struct inode *inode;
175 struct gfs2_inode *ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400176 struct gfs2_glock *io_gl;
177 int error;
178
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500179 if (skip_freeing)
180 inode = gfs2_iget_skip(sb, no_addr);
181 else
182 inode = gfs2_iget(sb, no_addr);
183 ip = GFS2_I(inode);
184
Steven Whitehouse26d83de2006-10-30 16:59:08 -0500185 if (!inode)
186 return ERR_PTR(-ENOBUFS);
187
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400188 if (inode->i_state & I_NEW) {
189 struct gfs2_sbd *sdp = GFS2_SB(inode);
Theodore Ts'obba9dfd2006-09-27 01:50:31 -0700190 inode->i_private = ip;
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400191 ip->i_no_formal_ino = no_formal_ino;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400192
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100193 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400194 if (unlikely(error))
195 goto fail;
196 ip->i_gl->gl_object = ip;
197
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100198 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400199 if (unlikely(error))
200 goto fail_put;
201
Steven Whitehousebfded272006-11-01 16:05:38 -0500202 set_bit(GIF_INVALID, &ip->i_flags);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400203 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
204 if (unlikely(error))
205 goto fail_iopen;
Abhijith Dasd93cfa92007-06-11 08:22:32 +0100206 ip->i_iopen_gh.gh_gl->gl_object = ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400207
208 gfs2_glock_put(io_gl);
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100209
Wendy Cheng35dcc522007-06-27 17:07:53 -0400210 if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
211 goto gfs2_nfsbypass;
212
213 inode->i_mode = DT2IF(type);
214
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100215 /*
216 * We must read the inode in order to work out its type in
217 * this case. Note that this doesn't happen often as we normally
218 * know the type beforehand. This code path only occurs during
219 * unlinked inode recovery (where it is safe to do this glock,
220 * which is not true in the general case).
221 */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100222 if (type == DT_UNKNOWN) {
223 struct gfs2_holder gh;
224 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
225 if (unlikely(error))
226 goto fail_glock;
227 /* Inode is now uptodate */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100228 gfs2_glock_dq_uninit(&gh);
229 }
230
Wendy Cheng35dcc522007-06-27 17:07:53 -0400231 gfs2_set_iop(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000232 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400233
Wendy Cheng35dcc522007-06-27 17:07:53 -0400234gfs2_nfsbypass:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400235 return inode;
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100236fail_glock:
237 gfs2_glock_dq(&ip->i_iopen_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400238fail_iopen:
239 gfs2_glock_put(io_gl);
240fail_put:
241 ip->i_gl->gl_object = NULL;
242 gfs2_glock_put(ip->i_gl);
243fail:
David Howells69840b02008-02-07 00:15:29 -0800244 iget_failed(inode);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400245 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000246}
247
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500248static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
Steven Whitehouseea744d02006-10-31 15:28:00 -0500249{
250 struct gfs2_dinode_host *di = &ip->i_di;
251 const struct gfs2_dinode *str = buf;
Steven Whitehouse9a004502008-02-01 09:23:44 +0000252 u16 height, depth;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500253
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000254 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
255 goto corrupt;
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100256 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500257 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500258 ip->i_inode.i_rdev = 0;
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500259 switch (ip->i_inode.i_mode & S_IFMT) {
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500260 case S_IFBLK:
261 case S_IFCHR:
262 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
263 be32_to_cpu(str->di_minor));
264 break;
265 };
266
Steven Whitehouse2933f922006-11-01 13:23:29 -0500267 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
268 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
Steven Whitehouse4f561102006-11-01 14:04:17 -0500269 /*
270 * We will need to review setting the nlink count here in the
271 * light of the forthcoming ro bind mount work. This is a reminder
272 * to do that.
273 */
274 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500275 di->di_size = be64_to_cpu(str->di_size);
Steven Whitehouse9e2dbda2006-11-08 15:45:46 -0500276 i_size_write(&ip->i_inode, di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000277 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500278 ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100279 ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500280 ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100281 ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec);
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -0500282 ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100283 ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500284
Steven Whitehousece276b02008-02-06 09:25:45 +0000285 ip->i_goal = be64_to_cpu(str->di_goal_meta);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500286 di->di_generation = be64_to_cpu(str->di_generation);
287
288 di->di_flags = be32_to_cpu(str->di_flags);
Steven Whitehouse6b124d82006-11-08 12:51:06 -0500289 gfs2_set_inode_flags(&ip->i_inode);
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000290 height = be16_to_cpu(str->di_height);
291 if (unlikely(height > GFS2_MAX_META_HEIGHT))
292 goto corrupt;
293 ip->i_height = (u8)height;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500294
Steven Whitehouse9a004502008-02-01 09:23:44 +0000295 depth = be16_to_cpu(str->di_depth);
296 if (unlikely(depth > GFS2_DIR_MAX_DEPTH))
297 goto corrupt;
298 ip->i_depth = (u8)depth;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500299 di->di_entries = be32_to_cpu(str->di_entries);
300
301 di->di_eattr = be64_to_cpu(str->di_eattr);
Steven Whitehouse55610932007-10-17 08:47:38 +0100302 if (S_ISREG(ip->i_inode.i_mode))
303 gfs2_set_aops(&ip->i_inode);
304
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500305 return 0;
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000306corrupt:
307 if (gfs2_consist_inode(ip))
308 gfs2_dinode_print(ip);
309 return -EIO;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500310}
311
David Teiglandb3b94fa2006-01-16 16:50:04 +0000312/**
313 * gfs2_inode_refresh - Refresh the incore copy of the dinode
314 * @ip: The GFS2 inode
315 *
316 * Returns: errno
317 */
318
319int gfs2_inode_refresh(struct gfs2_inode *ip)
320{
321 struct buffer_head *dibh;
322 int error;
323
324 error = gfs2_meta_inode_buffer(ip, &dibh);
325 if (error)
326 return error;
327
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400328 if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000329 brelse(dibh);
330 return -EIO;
331 }
332
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500333 error = gfs2_dinode_in(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000334 brelse(dibh);
Steven Whitehousebfded272006-11-01 16:05:38 -0500335 clear_bit(GIF_INVALID, &ip->i_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000336
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500337 return error;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000338}
339
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400340int gfs2_dinode_dealloc(struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000341{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400342 struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000343 struct gfs2_alloc *al;
344 struct gfs2_rgrpd *rgd;
345 int error;
346
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000347 if (gfs2_get_inode_blocks(&ip->i_inode) != 1) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000348 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500349 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000350 return -EIO;
351 }
352
353 al = gfs2_alloc_get(ip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300354 if (!al)
355 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000356
357 error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
358 if (error)
359 goto out;
360
361 error = gfs2_rindex_hold(sdp, &al->al_ri_gh);
362 if (error)
363 goto out_qs;
364
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100365 rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000366 if (!rgd) {
367 gfs2_consist_inode(ip);
368 error = -EIO;
369 goto out_rindex_relse;
370 }
371
372 error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0,
373 &al->al_rgd_gh);
374 if (error)
375 goto out_rindex_relse;
376
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400377 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000378 if (error)
379 goto out_rg_gunlock;
380
Steven Whitehouse2bcd6102007-11-08 14:25:12 +0000381 set_bit(GLF_DIRTY, &ip->i_gl->gl_flags);
382 set_bit(GLF_LFLUSH, &ip->i_gl->gl_flags);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000383
384 gfs2_free_di(rgd, ip);
385
David Teiglandb3b94fa2006-01-16 16:50:04 +0000386 gfs2_trans_end(sdp);
387 clear_bit(GLF_STICKY, &ip->i_gl->gl_flags);
388
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400389out_rg_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000390 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400391out_rindex_relse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000392 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400393out_qs:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000394 gfs2_quota_unhold(ip);
Steven Whitehouse36327522006-04-28 10:46:21 -0400395out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400396 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000397 return error;
398}
399
400/**
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500401 * gfs2_change_nlink - Change nlink count on inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000402 * @ip: The GFS2 inode
403 * @diff: The change in the nlink count required
404 *
405 * Returns: errno
406 */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500407int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000408{
409 struct buffer_head *dibh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400410 u32 nlink;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000411 int error;
412
Steven Whitehouse4f561102006-11-01 14:04:17 -0500413 BUG_ON(diff != 1 && diff != -1);
414 nlink = ip->i_inode.i_nlink + diff;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000415
416 /* If we are reducing the nlink count, but the new value ends up being
417 bigger than the old one, we must have underflowed. */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500418 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000419 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500420 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000421 return -EIO;
422 }
423
424 error = gfs2_meta_inode_buffer(ip, &dibh);
425 if (error)
426 return error;
427
Steven Whitehouse4f561102006-11-01 14:04:17 -0500428 if (diff > 0)
429 inc_nlink(&ip->i_inode);
430 else
431 drop_nlink(&ip->i_inode);
432
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100433 ip->i_inode.i_ctime = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000434
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000435 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500436 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000437 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400438 mark_inode_dirty(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000439
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500440 if (ip->i_inode.i_nlink == 0)
Russell Cattelanddee7602007-01-29 17:13:44 -0600441 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500442
S. Wendy Cheng55098262007-01-18 15:56:34 -0500443 return error;
444}
445
Steven Whitehousec7526662006-03-20 12:30:04 -0500446struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
447{
448 struct qstr qstr;
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600449 struct inode *inode;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500450 gfs2_str2qstr(&qstr, name);
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600451 inode = gfs2_lookupi(dip, &qstr, 1, NULL);
452 /* gfs2_lookupi has inconsistent callers: vfs
453 * related routines expect NULL for no entry found,
454 * gfs2_lookup_simple callers expect ENOENT
455 * and do not check for NULL.
456 */
457 if (inode == NULL)
458 return ERR_PTR(-ENOENT);
459 else
460 return inode;
Steven Whitehousec7526662006-03-20 12:30:04 -0500461}
462
463
David Teiglandb3b94fa2006-01-16 16:50:04 +0000464/**
465 * gfs2_lookupi - Look up a filename in a directory and return its inode
466 * @d_gh: An initialized holder for the directory glock
467 * @name: The name of the inode to look for
468 * @is_root: If 1, ignore the caller's permissions
469 * @i_gh: An uninitialized holder for the new inode glock
470 *
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000471 * This can be called via the VFS filldir function when NFS is doing
472 * a readdirplus and the inode which its intending to stat isn't
473 * already in cache. In this case we must not take the directory glock
474 * again, since the readdir call will have already taken that lock.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000475 *
476 * Returns: errno
477 */
478
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400479struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
480 int is_root, struct nameidata *nd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000481{
Steven Whitehousec9fd4302006-03-01 15:31:02 -0500482 struct super_block *sb = dir->i_sb;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400483 struct gfs2_inode *dip = GFS2_I(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000484 struct gfs2_holder d_gh;
akpm@linux-foundation.org037bcbb2007-06-08 16:42:14 -0700485 int error = 0;
Steven Whitehousec7526662006-03-20 12:30:04 -0500486 struct inode *inode = NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000487 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000488
489 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehousec7526662006-03-20 12:30:04 -0500490 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000491
Steven Whitehousec7526662006-03-20 12:30:04 -0500492 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
493 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
494 dir == sb->s_root->d_inode)) {
Steven Whitehouse320dd102006-05-18 16:25:27 -0400495 igrab(dir);
496 return dir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000497 }
498
Steven Whitehouse7afd88d2008-02-22 16:07:18 +0000499 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000500 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
501 if (error)
502 return ERR_PTR(error);
503 unlock = 1;
504 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000505
506 if (!is_root) {
Steven Whitehousefaf450e2006-06-22 10:59:10 -0400507 error = permission(dir, MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000508 if (error)
509 goto out;
510 }
511
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100512 inode = gfs2_dir_search(dir, name);
513 if (IS_ERR(inode))
514 error = PTR_ERR(inode);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000515out:
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000516 if (unlock)
517 gfs2_glock_dq_uninit(&d_gh);
Steven Whitehousec7526662006-03-20 12:30:04 -0500518 if (error == -ENOENT)
519 return NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000520 return inode ? inode : ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000521}
522
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100523static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf)
524{
525 const struct gfs2_inum_range *str = buf;
526
527 ir->ir_start = be64_to_cpu(str->ir_start);
528 ir->ir_length = be64_to_cpu(str->ir_length);
529}
530
531static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf)
532{
533 struct gfs2_inum_range *str = buf;
534
535 str->ir_start = cpu_to_be64(ir->ir_start);
536 str->ir_length = cpu_to_be64(ir->ir_length);
537}
538
Steven Whitehousecd915492006-09-04 12:49:07 -0400539static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000540{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400541 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000542 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400543 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000544 int error;
545
546 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
547 if (error)
548 return error;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000549 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000550
551 error = gfs2_meta_inode_buffer(ip, &bh);
552 if (error) {
Steven Whitehousef55ab262006-02-21 12:51:39 +0000553 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000554 gfs2_trans_end(sdp);
555 return error;
556 }
557
558 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
559
560 if (ir.ir_length) {
561 *formal_ino = ir.ir_start++;
562 ir.ir_length--;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000563 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000564 gfs2_inum_range_out(&ir,
565 bh->b_data + sizeof(struct gfs2_dinode));
566 brelse(bh);
Steven Whitehousef55ab262006-02-21 12:51:39 +0000567 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000568 gfs2_trans_end(sdp);
569 return 0;
570 }
571
572 brelse(bh);
573
Steven Whitehousef55ab262006-02-21 12:51:39 +0000574 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000575 gfs2_trans_end(sdp);
576
577 return 1;
578}
579
Steven Whitehousecd915492006-09-04 12:49:07 -0400580static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000581{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400582 struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode);
583 struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000584 struct gfs2_holder gh;
585 struct buffer_head *bh;
Al Viroe6972642006-10-13 21:29:46 -0400586 struct gfs2_inum_range_host ir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000587 int error;
588
589 error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
590 if (error)
591 return error;
592
593 error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0);
594 if (error)
595 goto out;
Steven Whitehousef55ab262006-02-21 12:51:39 +0000596 mutex_lock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000597
598 error = gfs2_meta_inode_buffer(ip, &bh);
599 if (error)
600 goto out_end_trans;
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400601
David Teiglandb3b94fa2006-01-16 16:50:04 +0000602 gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode));
603
604 if (!ir.ir_length) {
605 struct buffer_head *m_bh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400606 u64 x, y;
Al Virob44b84d2006-10-14 10:46:30 -0400607 __be64 z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000608
609 error = gfs2_meta_inode_buffer(m_ip, &m_bh);
610 if (error)
611 goto out_brelse;
612
Al Virob44b84d2006-10-14 10:46:30 -0400613 z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode));
614 x = y = be64_to_cpu(z);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000615 ir.ir_start = x;
616 ir.ir_length = GFS2_INUM_QUANTUM;
617 x += GFS2_INUM_QUANTUM;
618 if (x < y)
619 gfs2_consist_inode(m_ip);
Al Virob44b84d2006-10-14 10:46:30 -0400620 z = cpu_to_be64(x);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000621 gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1);
Al Virob44b84d2006-10-14 10:46:30 -0400622 *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000623
624 brelse(m_bh);
625 }
626
627 *formal_ino = ir.ir_start++;
628 ir.ir_length--;
629
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000630 gfs2_trans_add_bh(ip->i_gl, bh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000631 gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode));
632
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400633out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000634 brelse(bh);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400635out_end_trans:
Steven Whitehousef55ab262006-02-21 12:51:39 +0000636 mutex_unlock(&sdp->sd_inum_mutex);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000637 gfs2_trans_end(sdp);
Steven Whitehouse420b9e52006-07-31 15:42:17 -0400638out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000639 gfs2_glock_dq_uninit(&gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000640 return error;
641}
642
Steven Whitehousecd915492006-09-04 12:49:07 -0400643static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000644{
645 int error;
646
647 error = pick_formal_ino_1(sdp, inum);
648 if (error <= 0)
649 return error;
650
651 error = pick_formal_ino_2(sdp, inum);
652
653 return error;
654}
655
656/**
657 * create_ok - OK to create a new on-disk inode here?
658 * @dip: Directory in which dinode is to be created
659 * @name: Name of new dinode
660 * @mode:
661 *
662 * Returns: errno
663 */
664
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400665static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000666 unsigned int mode)
667{
668 int error;
669
Steven Whitehousefaf450e2006-06-22 10:59:10 -0400670 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000671 if (error)
672 return error;
673
674 /* Don't create entries in an unlinked directory */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500675 if (!dip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000676 return -EPERM;
677
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100678 error = gfs2_dir_check(&dip->i_inode, name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000679 switch (error) {
680 case -ENOENT:
681 error = 0;
682 break;
683 case 0:
684 return -EEXIST;
685 default:
686 return error;
687 }
688
Steven Whitehousecd915492006-09-04 12:49:07 -0400689 if (dip->i_di.di_entries == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000690 return -EFBIG;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500691 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000692 return -EMLINK;
693
694 return 0;
695}
696
697static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
698 unsigned int *uid, unsigned int *gid)
699{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400700 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
Steven Whitehouse2933f922006-11-01 13:23:29 -0500701 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000702 if (S_ISDIR(*mode))
703 *mode |= S_ISUID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500704 else if (dip->i_inode.i_uid != current->fsuid)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000705 *mode &= ~07111;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500706 *uid = dip->i_inode.i_uid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000707 } else
708 *uid = current->fsuid;
709
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500710 if (dip->i_inode.i_mode & S_ISGID) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000711 if (S_ISDIR(*mode))
712 *mode |= S_ISGID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500713 *gid = dip->i_inode.i_gid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 } else
715 *gid = current->fsgid;
716}
717
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100718static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000719{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400720 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000721 int error;
722
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000723 if (gfs2_alloc_get(dip) == NULL)
724 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000725
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000726 dip->i_alloc->al_requested = RES_DINODE;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000727 error = gfs2_inplace_reserve(dip);
728 if (error)
729 goto out;
730
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400731 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000732 if (error)
733 goto out_ipreserv;
734
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100735 *no_addr = gfs2_alloc_di(dip, generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000736
737 gfs2_trans_end(sdp);
738
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400739out_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000740 gfs2_inplace_release(dip);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400741out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000742 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000743 return error;
744}
745
746/**
747 * init_dinode - Fill in a new dinode structure
748 * @dip: the directory this inode is being created in
749 * @gl: The glock covering the new inode
750 * @inum: the inode number
751 * @mode: the file permissions
752 * @uid:
753 * @gid:
754 *
755 */
756
757static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400758 const struct gfs2_inum_host *inum, unsigned int mode,
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400759 unsigned int uid, unsigned int gid,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400760 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000761{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400762 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000763 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000764 struct buffer_head *dibh;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100765 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000766
767 dibh = gfs2_meta_new(gl, inum->no_addr);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000768 gfs2_trans_add_bh(gl, dibh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000769 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
770 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000771 di = (struct gfs2_dinode *)dibh->b_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000772
Steven Whitehouse2442a092006-01-30 11:49:32 +0000773 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
774 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000775 di->di_mode = cpu_to_be32(mode);
776 di->di_uid = cpu_to_be32(uid);
777 di->di_gid = cpu_to_be32(gid);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500778 di->di_nlink = 0;
779 di->di_size = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000780 di->di_blocks = cpu_to_be64(1);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100781 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500782 di->di_major = cpu_to_be32(MAJOR(dev));
783 di->di_minor = cpu_to_be32(MINOR(dev));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000784 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400785 di->di_generation = cpu_to_be64(*generation);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500786 di->di_flags = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000787
788 if (S_ISREG(mode)) {
789 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) ||
790 gfs2_tune_get(sdp, gt_new_files_jdata))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000791 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000792 if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) ||
793 gfs2_tune_get(sdp, gt_new_files_directio))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000794 di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000795 } else if (S_ISDIR(mode)) {
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500796 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
797 GFS2_DIF_INHERIT_DIRECTIO);
798 di->di_flags |= cpu_to_be32(dip->i_di.di_flags &
799 GFS2_DIF_INHERIT_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000800 }
801
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000802 di->__pad1 = 0;
Steven Whitehousea9583c72006-11-01 20:09:14 -0500803 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500804 di->di_height = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000805 di->__pad2 = 0;
806 di->__pad3 = 0;
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500807 di->di_depth = 0;
808 di->di_entries = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000809 memset(&di->__pad4, 0, sizeof(di->__pad4));
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500810 di->di_eattr = 0;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100811 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
812 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
813 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000814 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400815
816 set_buffer_uptodate(dibh);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000817
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400818 *bhp = dibh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000819}
820
821static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400822 unsigned int mode, const struct gfs2_inum_host *inum,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400823 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000824{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400825 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000826 unsigned int uid, gid;
827 int error;
828
829 munge_mode_uid_gid(dip, &mode, &uid, &gid);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300830 if (!gfs2_alloc_get(dip))
831 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000832
833 error = gfs2_quota_lock(dip, uid, gid);
834 if (error)
835 goto out;
836
837 error = gfs2_quota_check(dip, uid, gid);
838 if (error)
839 goto out_quota;
840
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400841 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000842 if (error)
843 goto out_quota;
844
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400845 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000846 gfs2_quota_change(dip, +1, uid, gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000847 gfs2_trans_end(sdp);
848
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400849out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000850 gfs2_quota_unlock(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400851out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000852 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000853 return error;
854}
855
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400856static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
857 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000858{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400859 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000860 struct gfs2_alloc *al;
861 int alloc_required;
862 struct buffer_head *dibh;
863 int error;
864
865 al = gfs2_alloc_get(dip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300866 if (!al)
867 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000868
869 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
870 if (error)
871 goto fail;
872
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400873 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
Steven Whitehousec7526662006-03-20 12:30:04 -0500874 if (alloc_required < 0)
Bob Peterson1b8177e2008-01-19 21:50:24 -0600875 goto fail_quota_locks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000876 if (alloc_required) {
Steven Whitehouse2933f922006-11-01 13:23:29 -0500877 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000878 if (error)
879 goto fail_quota_locks;
880
881 al->al_requested = sdp->sd_max_dirres;
882
883 error = gfs2_inplace_reserve(dip);
884 if (error)
885 goto fail_quota_locks;
886
Steven Whitehouse320dd102006-05-18 16:25:27 -0400887 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100888 al->al_rgd->rd_length +
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400889 2 * RES_DINODE +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000890 RES_STATFS + RES_QUOTA, 0);
891 if (error)
892 goto fail_ipreserv;
893 } else {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400894 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000895 if (error)
896 goto fail_quota_locks;
897 }
898
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100899 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000900 if (error)
901 goto fail_end_trans;
902
903 error = gfs2_meta_inode_buffer(ip, &dibh);
904 if (error)
905 goto fail_end_trans;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500906 ip->i_inode.i_nlink = 1;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000907 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500908 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000909 brelse(dibh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000910 return 0;
911
Steven Whitehouse320dd102006-05-18 16:25:27 -0400912fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000913 gfs2_trans_end(sdp);
914
Steven Whitehouse320dd102006-05-18 16:25:27 -0400915fail_ipreserv:
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000916 if (dip->i_alloc->al_rgd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000917 gfs2_inplace_release(dip);
918
Steven Whitehouse320dd102006-05-18 16:25:27 -0400919fail_quota_locks:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000920 gfs2_quota_unlock(dip);
921
Steven Whitehouse320dd102006-05-18 16:25:27 -0400922fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000923 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000924 return error;
925}
926
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400927static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
928{
929 int err;
930 size_t len;
931 void *value;
932 char *name;
933 struct gfs2_ea_request er;
934
935 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
936 &name, &value, &len);
937
938 if (err) {
939 if (err == -EOPNOTSUPP)
940 return 0;
941 return err;
942 }
943
944 memset(&er, 0, sizeof(struct gfs2_ea_request));
945
946 er.er_type = GFS2_EATYPE_SECURITY;
947 er.er_name = name;
948 er.er_data = value;
949 er.er_name_len = strlen(name);
950 er.er_data_len = len;
951
952 err = gfs2_ea_set_i(ip, &er);
953
954 kfree(value);
955 kfree(name);
956
957 return err;
958}
959
David Teiglandb3b94fa2006-01-16 16:50:04 +0000960/**
961 * gfs2_createi - Create a new inode
962 * @ghs: An array of two holders
963 * @name: The name of the new file
964 * @mode: the permissions on the new inode
965 *
966 * @ghs[0] is an initialized holder for the directory
967 * @ghs[1] is the holder for the inode lock
968 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000969 * If the return value is not NULL, the glocks on both the directory and the new
David Teiglandb3b94fa2006-01-16 16:50:04 +0000970 * file are held. A transaction has been started and an inplace reservation
971 * is held, as well.
972 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000973 * Returns: An inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000974 */
975
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400976struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500977 unsigned int mode, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000978{
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100979 struct inode *inode = NULL;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500980 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400981 struct inode *dir = &dip->i_inode;
982 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100983 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000984 int error;
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400985 u64 generation;
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100986 struct buffer_head *bh = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000987
988 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehouse7359a192006-02-13 12:27:43 +0000989 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000990
David Teiglandb3b94fa2006-01-16 16:50:04 +0000991 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
992 error = gfs2_glock_nq(ghs);
993 if (error)
994 goto fail;
995
996 error = create_ok(dip, name, mode);
997 if (error)
998 goto fail_gunlock;
999
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001000 error = pick_formal_ino(sdp, &inum.no_formal_ino);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001001 if (error)
1002 goto fail_gunlock;
1003
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001004 error = alloc_dinode(dip, &inum.no_addr, &generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001005 if (error)
1006 goto fail_gunlock;
1007
Steven Whitehouse28626e22006-11-22 11:13:21 -05001008 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
1009 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
1010 if (error)
1011 goto fail_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001012
Wendy Chenge9bd2b32007-08-24 09:15:01 -04001013 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001014 if (error)
1015 goto fail_gunlock2;
1016
Wendy Chengbb9bcf02007-06-27 17:07:08 -04001017 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode),
1018 inum.no_addr,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -05001019 inum.no_formal_ino, 0);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001020 if (IS_ERR(inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001021 goto fail_gunlock2;
1022
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001023 error = gfs2_inode_refresh(GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001024 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001025 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001026
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001027 error = gfs2_acl_create(dip, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001028 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001029 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001030
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -04001031 error = gfs2_security_init(dip, GFS2_I(inode));
1032 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001033 goto fail_gunlock2;
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -04001034
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001035 error = link_dinode(dip, name, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001036 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001037 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001038
Steven Whitehousef91a0d32007-10-15 16:29:05 +01001039 if (bh)
1040 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +00001041 if (!inode)
1042 return ERR_PTR(-ENOMEM);
1043 return inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001044
Steven Whitehouse320dd102006-05-18 16:25:27 -04001045fail_gunlock2:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001046 gfs2_glock_dq_uninit(ghs + 1);
Steven Whitehousee1cc8602007-06-07 11:47:52 +01001047 if (inode)
1048 iput(inode);
Steven Whitehouse320dd102006-05-18 16:25:27 -04001049fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001050 gfs2_glock_dq(ghs);
Steven Whitehouse320dd102006-05-18 16:25:27 -04001051fail:
Steven Whitehousef91a0d32007-10-15 16:29:05 +01001052 if (bh)
1053 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +00001054 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001055}
1056
1057/**
David Teiglandb3b94fa2006-01-16 16:50:04 +00001058 * gfs2_rmdiri - Remove a directory
1059 * @dip: The parent directory of the directory to be removed
1060 * @name: The name of the directory to be removed
1061 * @ip: The GFS2 inode of the directory to be removed
1062 *
1063 * Assumes Glocks on dip and ip are held
1064 *
1065 * Returns: errno
1066 */
1067
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001068int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name,
1069 struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001070{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001071 struct qstr dotname;
1072 int error;
1073
1074 if (ip->i_di.di_entries != 2) {
1075 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -05001076 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001077 return -EIO;
1078 }
1079
1080 error = gfs2_dir_del(dip, name);
1081 if (error)
1082 return error;
1083
1084 error = gfs2_change_nlink(dip, -1);
1085 if (error)
1086 return error;
1087
Steven Whitehouse71b86f52006-03-28 14:14:04 -05001088 gfs2_str2qstr(&dotname, ".");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001089 error = gfs2_dir_del(ip, &dotname);
1090 if (error)
1091 return error;
1092
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001093 gfs2_str2qstr(&dotname, "..");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001094 error = gfs2_dir_del(ip, &dotname);
1095 if (error)
1096 return error;
1097
Steven Whitehouse4f561102006-11-01 14:04:17 -05001098 /* It looks odd, but it really should be done twice */
1099 error = gfs2_change_nlink(ip, -1);
1100 if (error)
1101 return error;
1102
1103 error = gfs2_change_nlink(ip, -1);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001104 if (error)
1105 return error;
1106
David Teiglandb3b94fa2006-01-16 16:50:04 +00001107 return error;
1108}
1109
1110/*
1111 * gfs2_unlink_ok - check to see that a inode is still in a directory
1112 * @dip: the directory
1113 * @name: the name of the file
1114 * @ip: the inode
1115 *
1116 * Assumes that the lock on (at least) @dip is held.
1117 *
1118 * Returns: 0 if the parent/child relationship is correct, errno if it isn't
1119 */
1120
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001121int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name,
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001122 const struct gfs2_inode *ip)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001123{
David Teiglandb3b94fa2006-01-16 16:50:04 +00001124 int error;
1125
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001126 if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001127 return -EPERM;
1128
Steven Whitehouseb60623c2006-11-01 12:22:46 -05001129 if ((dip->i_inode.i_mode & S_ISVTX) &&
Steven Whitehouse2933f922006-11-01 13:23:29 -05001130 dip->i_inode.i_uid != current->fsuid &&
1131 ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001132 return -EPERM;
1133
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001134 if (IS_APPEND(&dip->i_inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +00001135 return -EPERM;
1136
Steven Whitehousefaf450e2006-06-22 10:59:10 -04001137 error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001138 if (error)
1139 return error;
1140
Steven Whitehousedbb7cae2007-05-15 15:37:50 +01001141 error = gfs2_dir_check(&dip->i_inode, name, ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001142 if (error)
1143 return error;
1144
David Teiglandb3b94fa2006-01-16 16:50:04 +00001145 return 0;
1146}
1147
1148/*
1149 * gfs2_ok_to_move - check if it's ok to move a directory to another directory
1150 * @this: move this
1151 * @to: to here
1152 *
1153 * Follow @to back to the root and make sure we don't encounter @this
1154 * Assumes we already hold the rename lock.
1155 *
1156 * Returns: errno
1157 */
1158
1159int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to)
1160{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001161 struct inode *dir = &to->i_inode;
Steven Whitehousec9fd4302006-03-01 15:31:02 -05001162 struct super_block *sb = dir->i_sb;
Steven Whitehouse7359a192006-02-13 12:27:43 +00001163 struct inode *tmp;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001164 struct qstr dotdot;
1165 int error = 0;
1166
Steven Whitehouse71b86f52006-03-28 14:14:04 -05001167 gfs2_str2qstr(&dotdot, "..");
David Teiglandb3b94fa2006-01-16 16:50:04 +00001168
Steven Whitehouse7359a192006-02-13 12:27:43 +00001169 igrab(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001170
1171 for (;;) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001172 if (dir == &this->i_inode) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001173 error = -EINVAL;
1174 break;
1175 }
Steven Whitehousec9fd4302006-03-01 15:31:02 -05001176 if (dir == sb->s_root->d_inode) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001177 error = 0;
1178 break;
1179 }
1180
Steven Whitehousec7526662006-03-20 12:30:04 -05001181 tmp = gfs2_lookupi(dir, &dotdot, 1, NULL);
1182 if (IS_ERR(tmp)) {
1183 error = PTR_ERR(tmp);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001184 break;
Steven Whitehousec7526662006-03-20 12:30:04 -05001185 }
David Teiglandb3b94fa2006-01-16 16:50:04 +00001186
Steven Whitehouse7359a192006-02-13 12:27:43 +00001187 iput(dir);
1188 dir = tmp;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001189 }
1190
Steven Whitehouse7359a192006-02-13 12:27:43 +00001191 iput(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001192
1193 return error;
1194}
1195
1196/**
1197 * gfs2_readlinki - return the contents of a symlink
1198 * @ip: the symlink's inode
1199 * @buf: a pointer to the buffer to be filled
1200 * @len: a pointer to the length of @buf
1201 *
1202 * If @buf is too small, a piece of memory is kmalloc()ed and needs
1203 * to be freed by the caller.
1204 *
1205 * Returns: errno
1206 */
1207
1208int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len)
1209{
1210 struct gfs2_holder i_gh;
1211 struct buffer_head *dibh;
1212 unsigned int x;
1213 int error;
1214
1215 gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh);
1216 error = gfs2_glock_nq_atime(&i_gh);
1217 if (error) {
1218 gfs2_holder_uninit(&i_gh);
1219 return error;
1220 }
1221
1222 if (!ip->i_di.di_size) {
1223 gfs2_consist_inode(ip);
1224 error = -EIO;
1225 goto out;
1226 }
1227
1228 error = gfs2_meta_inode_buffer(ip, &dibh);
1229 if (error)
1230 goto out;
1231
1232 x = ip->i_di.di_size + 1;
1233 if (x > *len) {
Josef Bacik16c5f062008-04-09 09:33:41 -04001234 *buf = kmalloc(x, GFP_NOFS);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001235 if (!*buf) {
1236 error = -ENOMEM;
1237 goto out_brelse;
1238 }
1239 }
1240
1241 memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x);
1242 *len = x;
1243
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001244out_brelse:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001245 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001246out:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001247 gfs2_glock_dq_uninit(&i_gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001248 return error;
1249}
1250
1251/**
1252 * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and
1253 * conditionally update the inode's atime
1254 * @gh: the holder to acquire
1255 *
1256 * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap
1257 * Update if the difference between the current time and the inode's current
1258 * atime is greater than an interval specified at mount.
1259 *
1260 * Returns: errno
1261 */
1262
1263int gfs2_glock_nq_atime(struct gfs2_holder *gh)
1264{
1265 struct gfs2_glock *gl = gh->gh_gl;
1266 struct gfs2_sbd *sdp = gl->gl_sbd;
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001267 struct gfs2_inode *ip = gl->gl_object;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001268 s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001269 unsigned int state;
1270 int flags;
1271 int error;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001272 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001273
1274 if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) ||
1275 gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) ||
1276 gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops))
1277 return -EINVAL;
1278
1279 state = gh->gh_state;
1280 flags = gh->gh_flags;
1281
1282 error = gfs2_glock_nq(gh);
1283 if (error)
1284 return error;
1285
1286 if (test_bit(SDF_NOATIME, &sdp->sd_flags) ||
1287 (sdp->sd_vfs->s_flags & MS_RDONLY))
1288 return 0;
1289
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001290 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001291 gfs2_glock_dq(gh);
Steven Whitehousefd88de562006-05-05 16:59:11 -04001292 gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY,
1293 gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001294 error = gfs2_glock_nq(gh);
1295 if (error)
1296 return error;
1297
1298 /* Verify that atime hasn't been updated while we were
1299 trying to get exclusive lock. */
1300
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001301 tv = CURRENT_TIME;
1302 if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) {
David Teiglandb3b94fa2006-01-16 16:50:04 +00001303 struct buffer_head *dibh;
Steven Whitehouse48516ce2006-10-02 12:39:19 -04001304 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001305
1306 error = gfs2_trans_begin(sdp, RES_DINODE, 0);
1307 if (error == -EROFS)
1308 return 0;
1309 if (error)
1310 goto fail;
1311
1312 error = gfs2_meta_inode_buffer(ip, &dibh);
1313 if (error)
1314 goto fail_end_trans;
1315
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001316 ip->i_inode.i_atime = tv;
David Teiglandb3b94fa2006-01-16 16:50:04 +00001317
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001318 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse48516ce2006-10-02 12:39:19 -04001319 di = (struct gfs2_dinode *)dibh->b_data;
Steven Whitehouse1a7b1ee2006-11-01 14:35:17 -05001320 di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001321 di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001322 brelse(dibh);
1323
1324 gfs2_trans_end(sdp);
1325 }
1326
1327 /* If someone else has asked for the glock,
1328 unlock and let them have it. Then reacquire
1329 in the original state. */
1330 if (gfs2_glock_is_blocking(gl)) {
1331 gfs2_glock_dq(gh);
1332 gfs2_holder_reinit(state, flags, gh);
1333 return gfs2_glock_nq(gh);
1334 }
1335 }
1336
1337 return 0;
1338
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001339fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001340 gfs2_trans_end(sdp);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001341fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +00001342 gfs2_glock_dq(gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001343 return error;
1344}
1345
David Teiglandb3b94fa2006-01-16 16:50:04 +00001346static int
1347__gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1348{
1349 struct buffer_head *dibh;
1350 int error;
1351
1352 error = gfs2_meta_inode_buffer(ip, &dibh);
1353 if (!error) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001354 error = inode_setattr(&ip->i_inode, attr);
1355 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +00001356 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -05001357 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001358 brelse(dibh);
1359 }
1360 return error;
1361}
1362
1363/**
1364 * gfs2_setattr_simple -
1365 * @ip:
1366 * @attr:
1367 *
1368 * Called with a reference on the vnode.
1369 *
1370 * Returns: errno
1371 */
1372
1373int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
1374{
1375 int error;
1376
Steven Whitehouse5c676f62006-02-27 17:23:27 -05001377 if (current->journal_info)
David Teiglandb3b94fa2006-01-16 16:50:04 +00001378 return __gfs2_setattr_simple(ip, attr);
1379
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001380 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +00001381 if (error)
1382 return error;
1383
1384 error = __gfs2_setattr_simple(ip, attr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -04001385 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +00001386 return error;
1387}
1388
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001389void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
1390{
1391 const struct gfs2_dinode_host *di = &ip->i_di;
1392 struct gfs2_dinode *str = buf;
1393
1394 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
1395 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
1396 str->di_header.__pad0 = 0;
1397 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
1398 str->di_header.__pad1 = 0;
1399 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
1400 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
1401 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
1402 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
1403 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
1404 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
1405 str->di_size = cpu_to_be64(di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001406 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001407 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
1408 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
1409 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
1410
Steven Whitehousece276b02008-02-06 09:25:45 +00001411 str->di_goal_meta = cpu_to_be64(ip->i_goal);
1412 str->di_goal_data = cpu_to_be64(ip->i_goal);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001413 str->di_generation = cpu_to_be64(di->di_generation);
1414
1415 str->di_flags = cpu_to_be32(di->di_flags);
Steven Whitehouseecc30c72008-01-28 10:37:35 +00001416 str->di_height = cpu_to_be16(ip->i_height);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001417 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
1418 !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ?
1419 GFS2_FORMAT_DE : 0);
Steven Whitehouse9a004502008-02-01 09:23:44 +00001420 str->di_depth = cpu_to_be16(ip->i_depth);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001421 str->di_entries = cpu_to_be32(di->di_entries);
1422
1423 str->di_eattr = cpu_to_be64(di->di_eattr);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +01001424 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
1425 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
1426 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001427}
1428
1429void gfs2_dinode_print(const struct gfs2_inode *ip)
1430{
1431 const struct gfs2_dinode_host *di = &ip->i_di;
1432
1433 printk(KERN_INFO " no_formal_ino = %llu\n",
1434 (unsigned long long)ip->i_no_formal_ino);
1435 printk(KERN_INFO " no_addr = %llu\n",
1436 (unsigned long long)ip->i_no_addr);
1437 printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size);
Steven Whitehouse77658aa2008-02-12 14:17:27 +00001438 printk(KERN_INFO " blocks = %llu\n",
1439 (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousece276b02008-02-06 09:25:45 +00001440 printk(KERN_INFO " i_goal = %llu\n",
1441 (unsigned long long)ip->i_goal);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001442 printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags);
Bob Petersonca390602008-01-28 11:15:57 -06001443 printk(KERN_INFO " i_height = %u\n", ip->i_height);
Steven Whitehouse9a004502008-02-01 09:23:44 +00001444 printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001445 printk(KERN_INFO " di_entries = %u\n", di->di_entries);
1446 printk(KERN_INFO " di_eattr = %llu\n",
1447 (unsigned long long)di->di_eattr);
1448}
1449