blob: fb15d3b1f409de393137676c6d350604e2fc712b [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>
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -040019#include <linux/security.h>
Steven Whitehouse719ee342008-09-18 13:53:59 +010020#include <linux/time.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"
Steven Whitehouse307cf6e2009-08-26 18:51:04 +010027#include "xattr.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000028#include "glock.h"
29#include "glops.h"
30#include "inode.h"
31#include "log.h"
32#include "meta_io.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000033#include "quota.h"
34#include "rgrp.h"
35#include "trans.h"
Steven Whitehouse5c676f62006-02-27 17:23:27 -050036#include "util.h"
David Teiglandb3b94fa2006-01-16 16:50:04 +000037
Steven Whitehousebb8d8a62007-06-01 14:11:58 +010038struct gfs2_inum_range_host {
39 u64 ir_start;
40 u64 ir_length;
41};
42
David Teiglandb3b94fa2006-01-16 16:50:04 +000043static int iget_test(struct inode *inode, void *opaque)
44{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040045 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010046 u64 *no_addr = opaque;
David Teiglandb3b94fa2006-01-16 16:50:04 +000047
Bob Peterson091806ed2008-04-29 12:35:48 -050048 if (ip->i_no_addr == *no_addr && test_bit(GIF_USER, &ip->i_flags))
David Teiglandb3b94fa2006-01-16 16:50:04 +000049 return 1;
50
51 return 0;
52}
53
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040054static int iget_set(struct inode *inode, void *opaque)
55{
56 struct gfs2_inode *ip = GFS2_I(inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010057 u64 *no_addr = opaque;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040058
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010059 inode->i_ino = (unsigned long)*no_addr;
60 ip->i_no_addr = *no_addr;
Bob Peterson091806ed2008-04-29 12:35:48 -050061 set_bit(GIF_USER, &ip->i_flags);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040062 return 0;
63}
64
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010065struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000066{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010067 unsigned long hash = (unsigned long)no_addr;
68 return ilookup5(sb, hash, iget_test, &no_addr);
David Teiglandb3b94fa2006-01-16 16:50:04 +000069}
70
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010071static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr)
David Teiglandb3b94fa2006-01-16 16:50:04 +000072{
Steven Whitehousedbb7cae2007-05-15 15:37:50 +010073 unsigned long hash = (unsigned long)no_addr;
74 return iget5_locked(sb, hash, iget_test, iget_set, &no_addr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -040075}
76
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -050077struct gfs2_skip_data {
78 u64 no_addr;
79 int skipped;
80};
81
82static int iget_skip_test(struct inode *inode, void *opaque)
83{
84 struct gfs2_inode *ip = GFS2_I(inode);
85 struct gfs2_skip_data *data = opaque;
86
Bob Peterson091806ed2008-04-29 12:35:48 -050087 if (ip->i_no_addr == data->no_addr && test_bit(GIF_USER, &ip->i_flags)){
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -050088 if (inode->i_state & (I_FREEING|I_CLEAR|I_WILL_FREE)){
89 data->skipped = 1;
90 return 0;
91 }
92 return 1;
93 }
94 return 0;
95}
96
97static int iget_skip_set(struct inode *inode, void *opaque)
98{
99 struct gfs2_inode *ip = GFS2_I(inode);
100 struct gfs2_skip_data *data = opaque;
101
102 if (data->skipped)
103 return 1;
104 inode->i_ino = (unsigned long)(data->no_addr);
105 ip->i_no_addr = data->no_addr;
Bob Peterson091806ed2008-04-29 12:35:48 -0500106 set_bit(GIF_USER, &ip->i_flags);
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500107 return 0;
108}
109
110static struct inode *gfs2_iget_skip(struct super_block *sb,
111 u64 no_addr)
112{
113 struct gfs2_skip_data data;
114 unsigned long hash = (unsigned long)no_addr;
115
116 data.no_addr = no_addr;
117 data.skipped = 0;
118 return iget5_locked(sb, hash, iget_skip_test, iget_skip_set, &data);
119}
120
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400121/**
Wendy Cheng35dcc522007-06-27 17:07:53 -0400122 * GFS2 lookup code fills in vfs inode contents based on info obtained
123 * from directory entry inside gfs2_inode_lookup(). This has caused issues
124 * with NFS code path since its get_dentry routine doesn't have the relevant
125 * directory entry when gfs2_inode_lookup() is invoked. Part of the code
126 * segment inside gfs2_inode_lookup code needs to get moved around.
127 *
128 * Clean up I_LOCK and I_NEW as well.
129 **/
130
131void gfs2_set_iop(struct inode *inode)
132{
Wendy Chengc97bfe42007-11-29 17:56:51 -0500133 struct gfs2_sbd *sdp = GFS2_SB(inode);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400134 umode_t mode = inode->i_mode;
135
136 if (S_ISREG(mode)) {
137 inode->i_op = &gfs2_file_iops;
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000138 if (gfs2_localflocks(sdp))
Christoph Hellwig10d21982009-04-07 19:42:17 +0200139 inode->i_fop = &gfs2_file_fops_nolock;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500140 else
Christoph Hellwig10d21982009-04-07 19:42:17 +0200141 inode->i_fop = &gfs2_file_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400142 } else if (S_ISDIR(mode)) {
143 inode->i_op = &gfs2_dir_iops;
Steven Whitehousef057f6c2009-01-12 10:43:39 +0000144 if (gfs2_localflocks(sdp))
Christoph Hellwig10d21982009-04-07 19:42:17 +0200145 inode->i_fop = &gfs2_dir_fops_nolock;
Wendy Chengc97bfe42007-11-29 17:56:51 -0500146 else
Christoph Hellwig10d21982009-04-07 19:42:17 +0200147 inode->i_fop = &gfs2_dir_fops;
Wendy Cheng35dcc522007-06-27 17:07:53 -0400148 } else if (S_ISLNK(mode)) {
149 inode->i_op = &gfs2_symlink_iops;
150 } else {
Denis Chengd83225d2008-02-26 15:25:03 +0800151 inode->i_op = &gfs2_file_iops;
Denis Cheng43a33c52008-02-26 15:25:04 +0800152 init_special_inode(inode, inode->i_mode, inode->i_rdev);
Wendy Cheng35dcc522007-06-27 17:07:53 -0400153 }
154
155 unlock_new_inode(inode);
156}
157
158/**
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400159 * gfs2_inode_lookup - Lookup an inode
160 * @sb: The super block
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100161 * @no_addr: The inode number
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400162 * @type: The type of the inode
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500163 * @skip_freeing: set this not return an inode if it is currently being freed.
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400164 *
165 * Returns: A VFS inode, or an error
166 */
167
Bob Peterson091806ed2008-04-29 12:35:48 -0500168struct inode *gfs2_inode_lookup(struct super_block *sb,
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400169 unsigned int type,
170 u64 no_addr,
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500171 u64 no_formal_ino, int skip_freeing)
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400172{
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500173 struct inode *inode;
174 struct gfs2_inode *ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400175 struct gfs2_glock *io_gl;
176 int error;
177
Benjamin Marzinski7a9f53b2007-09-18 13:33:18 -0500178 if (skip_freeing)
179 inode = gfs2_iget_skip(sb, no_addr);
180 else
181 inode = gfs2_iget(sb, no_addr);
182 ip = GFS2_I(inode);
183
Steven Whitehouse26d83de2006-10-30 16:59:08 -0500184 if (!inode)
185 return ERR_PTR(-ENOBUFS);
186
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400187 if (inode->i_state & I_NEW) {
188 struct gfs2_sbd *sdp = GFS2_SB(inode);
Wendy Chengbb9bcf02007-06-27 17:07:08 -0400189 ip->i_no_formal_ino = no_formal_ino;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400190
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100191 error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400192 if (unlikely(error))
193 goto fail;
194 ip->i_gl->gl_object = ip;
195
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100196 error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400197 if (unlikely(error))
198 goto fail_put;
199
Steven Whitehousebfded272006-11-01 16:05:38 -0500200 set_bit(GIF_INVALID, &ip->i_flags);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400201 error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh);
202 if (unlikely(error))
203 goto fail_iopen;
Abhijith Dasd93cfa92007-06-11 08:22:32 +0100204 ip->i_iopen_gh.gh_gl->gl_object = ip;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400205
206 gfs2_glock_put(io_gl);
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100207
Wendy Cheng35dcc522007-06-27 17:07:53 -0400208 if ((type == DT_UNKNOWN) && (no_formal_ino == 0))
209 goto gfs2_nfsbypass;
210
211 inode->i_mode = DT2IF(type);
212
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100213 /*
214 * We must read the inode in order to work out its type in
215 * this case. Note that this doesn't happen often as we normally
216 * know the type beforehand. This code path only occurs during
217 * unlinked inode recovery (where it is safe to do this glock,
218 * which is not true in the general case).
219 */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100220 if (type == DT_UNKNOWN) {
221 struct gfs2_holder gh;
222 error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
223 if (unlikely(error))
224 goto fail_glock;
225 /* Inode is now uptodate */
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100226 gfs2_glock_dq_uninit(&gh);
227 }
228
Wendy Cheng35dcc522007-06-27 17:07:53 -0400229 gfs2_set_iop(inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000230 }
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400231
Wendy Cheng35dcc522007-06-27 17:07:53 -0400232gfs2_nfsbypass:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400233 return inode;
Steven Whitehousec8cdf472007-06-08 10:05:33 +0100234fail_glock:
235 gfs2_glock_dq(&ip->i_iopen_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400236fail_iopen:
237 gfs2_glock_put(io_gl);
238fail_put:
239 ip->i_gl->gl_object = NULL;
240 gfs2_glock_put(ip->i_gl);
241fail:
David Howells69840b02008-02-07 00:15:29 -0800242 iget_failed(inode);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400243 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000244}
245
Steven Whitehouseaf339c02006-11-01 10:34:15 -0500246static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf)
Steven Whitehouseea744d02006-10-31 15:28:00 -0500247{
Steven Whitehouseea744d02006-10-31 15:28:00 -0500248 const struct gfs2_dinode *str = buf;
Steven Whitehouse719ee342008-09-18 13:53:59 +0100249 struct timespec atime;
Steven Whitehouse9a004502008-02-01 09:23:44 +0000250 u16 height, depth;
Steven Whitehouseea744d02006-10-31 15:28:00 -0500251
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000252 if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)))
253 goto corrupt;
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100254 ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino);
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500255 ip->i_inode.i_mode = be32_to_cpu(str->di_mode);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500256 ip->i_inode.i_rdev = 0;
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500257 switch (ip->i_inode.i_mode & S_IFMT) {
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500258 case S_IFBLK:
259 case S_IFCHR:
260 ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major),
261 be32_to_cpu(str->di_minor));
262 break;
263 };
264
Steven Whitehouse2933f922006-11-01 13:23:29 -0500265 ip->i_inode.i_uid = be32_to_cpu(str->di_uid);
266 ip->i_inode.i_gid = be32_to_cpu(str->di_gid);
Steven Whitehouse4f561102006-11-01 14:04:17 -0500267 /*
268 * We will need to review setting the nlink count here in the
269 * light of the forthcoming ro bind mount work. This is a reminder
270 * to do that.
271 */
272 ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink);
Steven Whitehousec9e98882008-11-04 09:47:33 +0000273 ip->i_disksize = be64_to_cpu(str->di_size);
274 i_size_write(&ip->i_inode, ip->i_disksize);
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000275 gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks));
Steven Whitehouse719ee342008-09-18 13:53:59 +0100276 atime.tv_sec = be64_to_cpu(str->di_atime);
277 atime.tv_nsec = be32_to_cpu(str->di_atime_nsec);
278 if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0)
279 ip->i_inode.i_atime = atime;
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 Whitehousebcf0b5b2008-11-03 13:39:46 +0000286 ip->i_generation = be64_to_cpu(str->di_generation);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500287
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000288 ip->i_diskflags = 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 Whitehousead6203f2008-11-03 13:59:19 +0000299 ip->i_entries = be32_to_cpu(str->di_entries);
Steven Whitehouseea744d02006-10-31 15:28:00 -0500300
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000301 ip->i_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);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000387
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400388out_rg_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000389 gfs2_glock_dq_uninit(&al->al_rgd_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400390out_rindex_relse:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000391 gfs2_glock_dq_uninit(&al->al_ri_gh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400392out_qs:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000393 gfs2_quota_unhold(ip);
Steven Whitehouse36327522006-04-28 10:46:21 -0400394out:
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400395 gfs2_alloc_put(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000396 return error;
397}
398
399/**
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500400 * gfs2_change_nlink - Change nlink count on inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000401 * @ip: The GFS2 inode
402 * @diff: The change in the nlink count required
403 *
404 * Returns: errno
405 */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500406int gfs2_change_nlink(struct gfs2_inode *ip, int diff)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000407{
408 struct buffer_head *dibh;
Steven Whitehousecd915492006-09-04 12:49:07 -0400409 u32 nlink;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000410 int error;
411
Steven Whitehouse4f561102006-11-01 14:04:17 -0500412 BUG_ON(diff != 1 && diff != -1);
413 nlink = ip->i_inode.i_nlink + diff;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000414
415 /* If we are reducing the nlink count, but the new value ends up being
416 bigger than the old one, we must have underflowed. */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500417 if (diff < 0 && nlink > ip->i_inode.i_nlink) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000418 if (gfs2_consist_inode(ip))
Steven Whitehouse4cc14f02006-10-31 19:00:24 -0500419 gfs2_dinode_print(ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000420 return -EIO;
421 }
422
423 error = gfs2_meta_inode_buffer(ip, &dibh);
424 if (error)
425 return error;
426
Steven Whitehouse4f561102006-11-01 14:04:17 -0500427 if (diff > 0)
428 inc_nlink(&ip->i_inode);
429 else
430 drop_nlink(&ip->i_inode);
431
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100432 ip->i_inode.i_ctime = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000433
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000434 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500435 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000436 brelse(dibh);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400437 mark_inode_dirty(&ip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000438
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500439 if (ip->i_inode.i_nlink == 0)
Russell Cattelanddee7602007-01-29 17:13:44 -0600440 gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */
S. Wendy Cheng87d21e02007-01-18 16:07:03 -0500441
S. Wendy Cheng55098262007-01-18 15:56:34 -0500442 return error;
443}
444
Steven Whitehousec7526662006-03-20 12:30:04 -0500445struct inode *gfs2_lookup_simple(struct inode *dip, const char *name)
446{
447 struct qstr qstr;
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600448 struct inode *inode;
Steven Whitehouse71b86f52006-03-28 14:14:04 -0500449 gfs2_str2qstr(&qstr, name);
Al Viroa569c712008-07-23 14:42:05 -0400450 inode = gfs2_lookupi(dip, &qstr, 1);
Russell Cattelan6c93fd12007-01-08 17:47:51 -0600451 /* gfs2_lookupi has inconsistent callers: vfs
452 * related routines expect NULL for no entry found,
453 * gfs2_lookup_simple callers expect ENOENT
454 * and do not check for NULL.
455 */
456 if (inode == NULL)
457 return ERR_PTR(-ENOENT);
458 else
459 return inode;
Steven Whitehousec7526662006-03-20 12:30:04 -0500460}
461
462
David Teiglandb3b94fa2006-01-16 16:50:04 +0000463/**
464 * gfs2_lookupi - Look up a filename in a directory and return its inode
465 * @d_gh: An initialized holder for the directory glock
466 * @name: The name of the inode to look for
467 * @is_root: If 1, ignore the caller's permissions
468 * @i_gh: An uninitialized holder for the new inode glock
469 *
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000470 * This can be called via the VFS filldir function when NFS is doing
471 * a readdirplus and the inode which its intending to stat isn't
472 * already in cache. In this case we must not take the directory glock
473 * again, since the readdir call will have already taken that lock.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000474 *
475 * Returns: errno
476 */
477
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400478struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name,
Al Viroa569c712008-07-23 14:42:05 -0400479 int is_root)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000480{
Steven Whitehousec9fd4302006-03-01 15:31:02 -0500481 struct super_block *sb = dir->i_sb;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400482 struct gfs2_inode *dip = GFS2_I(dir);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000483 struct gfs2_holder d_gh;
akpm@linux-foundation.org037bcbb2007-06-08 16:42:14 -0700484 int error = 0;
Steven Whitehousec7526662006-03-20 12:30:04 -0500485 struct inode *inode = NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000486 int unlock = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000487
488 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehousec7526662006-03-20 12:30:04 -0500489 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000490
Steven Whitehousec7526662006-03-20 12:30:04 -0500491 if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) ||
492 (name->len == 2 && memcmp(name->name, "..", 2) == 0 &&
493 dir == sb->s_root->d_inode)) {
Steven Whitehouse320dd102006-05-18 16:25:27 -0400494 igrab(dir);
495 return dir;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000496 }
497
Steven Whitehouse7afd88d2008-02-22 16:07:18 +0000498 if (gfs2_glock_is_locked_by_me(dip->i_gl) == NULL) {
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000499 error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh);
500 if (error)
501 return ERR_PTR(error);
502 unlock = 1;
503 }
David Teiglandb3b94fa2006-01-16 16:50:04 +0000504
505 if (!is_root) {
Miklos Szeredif58ba882008-07-02 21:12:01 +0200506 error = gfs2_permission(dir, MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000507 if (error)
508 goto out;
509 }
510
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100511 inode = gfs2_dir_search(dir, name);
512 if (IS_ERR(inode))
513 error = PTR_ERR(inode);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000514out:
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000515 if (unlock)
516 gfs2_glock_dq_uninit(&d_gh);
Steven Whitehousec7526662006-03-20 12:30:04 -0500517 if (error == -ENOENT)
518 return NULL;
Steven Whitehoused7c103d2007-01-25 17:14:59 +0000519 return inode ? inode : ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000520}
521
David Teiglandb3b94fa2006-01-16 16:50:04 +0000522/**
523 * create_ok - OK to create a new on-disk inode here?
524 * @dip: Directory in which dinode is to be created
525 * @name: Name of new dinode
526 * @mode:
527 *
528 * Returns: errno
529 */
530
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400531static int create_ok(struct gfs2_inode *dip, const struct qstr *name,
David Teiglandb3b94fa2006-01-16 16:50:04 +0000532 unsigned int mode)
533{
534 int error;
535
Miklos Szeredif58ba882008-07-02 21:12:01 +0200536 error = gfs2_permission(&dip->i_inode, MAY_WRITE | MAY_EXEC);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000537 if (error)
538 return error;
539
540 /* Don't create entries in an unlinked directory */
Steven Whitehouse4f561102006-11-01 14:04:17 -0500541 if (!dip->i_inode.i_nlink)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000542 return -EPERM;
543
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100544 error = gfs2_dir_check(&dip->i_inode, name, NULL);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000545 switch (error) {
546 case -ENOENT:
547 error = 0;
548 break;
549 case 0:
550 return -EEXIST;
551 default:
552 return error;
553 }
554
Steven Whitehousead6203f2008-11-03 13:59:19 +0000555 if (dip->i_entries == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000556 return -EFBIG;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500557 if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000558 return -EMLINK;
559
560 return 0;
561}
562
563static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode,
564 unsigned int *uid, unsigned int *gid)
565{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400566 if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir &&
Steven Whitehouse2933f922006-11-01 13:23:29 -0500567 (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000568 if (S_ISDIR(*mode))
569 *mode |= S_ISUID;
David Howells3de7be32008-11-14 10:38:53 +1100570 else if (dip->i_inode.i_uid != current_fsuid())
David Teiglandb3b94fa2006-01-16 16:50:04 +0000571 *mode &= ~07111;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500572 *uid = dip->i_inode.i_uid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000573 } else
David Howells3de7be32008-11-14 10:38:53 +1100574 *uid = current_fsuid();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000575
Steven Whitehouseb60623c2006-11-01 12:22:46 -0500576 if (dip->i_inode.i_mode & S_ISGID) {
David Teiglandb3b94fa2006-01-16 16:50:04 +0000577 if (S_ISDIR(*mode))
578 *mode |= S_ISGID;
Steven Whitehouse2933f922006-11-01 13:23:29 -0500579 *gid = dip->i_inode.i_gid;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000580 } else
David Howells3de7be32008-11-14 10:38:53 +1100581 *gid = current_fsgid();
David Teiglandb3b94fa2006-01-16 16:50:04 +0000582}
583
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100584static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000585{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400586 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000587 int error;
588
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000589 if (gfs2_alloc_get(dip) == NULL)
590 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000591
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000592 dip->i_alloc->al_requested = RES_DINODE;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000593 error = gfs2_inplace_reserve(dip);
594 if (error)
595 goto out;
596
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400597 error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000598 if (error)
599 goto out_ipreserv;
600
Steven Whitehouse6050b9c2009-07-31 16:19:40 +0100601 error = gfs2_alloc_di(dip, no_addr, generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000602
603 gfs2_trans_end(sdp);
604
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400605out_ipreserv:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000606 gfs2_inplace_release(dip);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400607out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000608 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000609 return error;
610}
611
612/**
613 * init_dinode - Fill in a new dinode structure
614 * @dip: the directory this inode is being created in
615 * @gl: The glock covering the new inode
616 * @inum: the inode number
617 * @mode: the file permissions
618 * @uid:
619 * @gid:
620 *
621 */
622
623static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400624 const struct gfs2_inum_host *inum, unsigned int mode,
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400625 unsigned int uid, unsigned int gid,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400626 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000627{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400628 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000629 struct gfs2_dinode *di;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000630 struct buffer_head *dibh;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100631 struct timespec tv = CURRENT_TIME;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000632
633 dibh = gfs2_meta_new(gl, inum->no_addr);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000634 gfs2_trans_add_bh(gl, dibh, 1);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000635 gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI);
636 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000637 di = (struct gfs2_dinode *)dibh->b_data;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000638
Steven Whitehouse2442a092006-01-30 11:49:32 +0000639 di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino);
640 di->di_num.no_addr = cpu_to_be64(inum->no_addr);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000641 di->di_mode = cpu_to_be32(mode);
642 di->di_uid = cpu_to_be32(uid);
643 di->di_gid = cpu_to_be32(gid);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500644 di->di_nlink = 0;
645 di->di_size = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000646 di->di_blocks = cpu_to_be64(1);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100647 di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec);
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500648 di->di_major = cpu_to_be32(MAJOR(dev));
649 di->di_minor = cpu_to_be32(MINOR(dev));
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000650 di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr);
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400651 di->di_generation = cpu_to_be64(*generation);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500652 di->di_flags = 0;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000653
654 if (S_ISREG(mode)) {
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000655 if ((dip->i_diskflags & GFS2_DIF_INHERIT_JDATA) ||
David Teiglandb3b94fa2006-01-16 16:50:04 +0000656 gfs2_tune_get(sdp, gt_new_files_jdata))
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000657 di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000658 } else if (S_ISDIR(mode)) {
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000659 di->di_flags |= cpu_to_be32(dip->i_diskflags &
Steven Whitehouse568f4c92006-02-27 12:00:42 -0500660 GFS2_DIF_INHERIT_JDATA);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000661 }
662
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000663 di->__pad1 = 0;
Steven Whitehousea9583c72006-11-01 20:09:14 -0500664 di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0);
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500665 di->di_height = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000666 di->__pad2 = 0;
667 di->__pad3 = 0;
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500668 di->di_depth = 0;
669 di->di_entries = 0;
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000670 memset(&di->__pad4, 0, sizeof(di->__pad4));
Steven Whitehouse294caaa2006-11-02 11:59:28 -0500671 di->di_eattr = 0;
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100672 di->di_atime_nsec = cpu_to_be32(tv.tv_nsec);
673 di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec);
674 di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000675 memset(&di->di_reserved, 0, sizeof(di->di_reserved));
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400676
677 set_buffer_uptodate(dibh);
Steven Whitehouseb96ca4f2006-01-18 10:57:10 +0000678
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400679 *bhp = dibh;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000680}
681
682static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl,
Al Viro629a21e2006-10-13 22:51:24 -0400683 unsigned int mode, const struct gfs2_inum_host *inum,
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400684 const u64 *generation, dev_t dev, struct buffer_head **bhp)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000685{
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400686 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000687 unsigned int uid, gid;
688 int error;
689
690 munge_mode_uid_gid(dip, &mode, &uid, &gid);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300691 if (!gfs2_alloc_get(dip))
692 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000693
694 error = gfs2_quota_lock(dip, uid, gid);
695 if (error)
696 goto out;
697
698 error = gfs2_quota_check(dip, uid, gid);
699 if (error)
700 goto out_quota;
701
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400702 error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000703 if (error)
704 goto out_quota;
705
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400706 init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000707 gfs2_quota_change(dip, +1, uid, gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000708 gfs2_trans_end(sdp);
709
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400710out_quota:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000711 gfs2_quota_unlock(dip);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400712out:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000713 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000714 return error;
715}
716
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400717static int link_dinode(struct gfs2_inode *dip, const struct qstr *name,
718 struct gfs2_inode *ip)
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 struct gfs2_alloc *al;
722 int alloc_required;
723 struct buffer_head *dibh;
724 int error;
725
726 al = gfs2_alloc_get(dip);
Cyrill Gorcunov182fe5a2008-03-03 21:54:21 +0300727 if (!al)
728 return -ENOMEM;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000729
730 error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE);
731 if (error)
732 goto fail;
733
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400734 error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name);
Steven Whitehousec7526662006-03-20 12:30:04 -0500735 if (alloc_required < 0)
Bob Peterson1b8177e2008-01-19 21:50:24 -0600736 goto fail_quota_locks;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000737 if (alloc_required) {
Steven Whitehouse2933f922006-11-01 13:23:29 -0500738 error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000739 if (error)
740 goto fail_quota_locks;
741
742 al->al_requested = sdp->sd_max_dirres;
743
744 error = gfs2_inplace_reserve(dip);
745 if (error)
746 goto fail_quota_locks;
747
Steven Whitehouse320dd102006-05-18 16:25:27 -0400748 error = gfs2_trans_begin(sdp, sdp->sd_max_dirres +
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100749 al->al_rgd->rd_length +
Steven Whitehouse907b9bc2006-09-25 09:26:04 -0400750 2 * RES_DINODE +
David Teiglandb3b94fa2006-01-16 16:50:04 +0000751 RES_STATFS + RES_QUOTA, 0);
752 if (error)
753 goto fail_ipreserv;
754 } else {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400755 error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000756 if (error)
757 goto fail_quota_locks;
758 }
759
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100760 error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000761 if (error)
762 goto fail_end_trans;
763
764 error = gfs2_meta_inode_buffer(ip, &dibh);
765 if (error)
766 goto fail_end_trans;
Steven Whitehouse4f561102006-11-01 14:04:17 -0500767 ip->i_inode.i_nlink = 1;
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000768 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500769 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000770 brelse(dibh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000771 return 0;
772
Steven Whitehouse320dd102006-05-18 16:25:27 -0400773fail_end_trans:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000774 gfs2_trans_end(sdp);
775
Steven Whitehouse320dd102006-05-18 16:25:27 -0400776fail_ipreserv:
Steven Whitehouse6dbd8222008-01-10 15:18:55 +0000777 if (dip->i_alloc->al_rgd)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000778 gfs2_inplace_release(dip);
779
Steven Whitehouse320dd102006-05-18 16:25:27 -0400780fail_quota_locks:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000781 gfs2_quota_unlock(dip);
782
Steven Whitehouse320dd102006-05-18 16:25:27 -0400783fail:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000784 gfs2_alloc_put(dip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000785 return error;
786}
787
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400788static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip)
789{
790 int err;
791 size_t len;
792 void *value;
793 char *name;
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400794
795 err = security_inode_init_security(&ip->i_inode, &dip->i_inode,
796 &name, &value, &len);
797
798 if (err) {
799 if (err == -EOPNOTSUPP)
800 return 0;
801 return err;
802 }
803
Steven Whitehouse40b78a32009-08-26 18:41:32 +0100804 err = gfs2_xattr_set(&ip->i_inode, GFS2_EATYPE_SECURITY, name, value, len, 0);
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400805 kfree(value);
806 kfree(name);
807
808 return err;
809}
810
David Teiglandb3b94fa2006-01-16 16:50:04 +0000811/**
812 * gfs2_createi - Create a new inode
813 * @ghs: An array of two holders
814 * @name: The name of the new file
815 * @mode: the permissions on the new inode
816 *
817 * @ghs[0] is an initialized holder for the directory
818 * @ghs[1] is the holder for the inode lock
819 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000820 * If the return value is not NULL, the glocks on both the directory and the new
David Teiglandb3b94fa2006-01-16 16:50:04 +0000821 * file are held. A transaction has been started and an inplace reservation
822 * is held, as well.
823 *
Steven Whitehouse7359a192006-02-13 12:27:43 +0000824 * Returns: An inode
David Teiglandb3b94fa2006-01-16 16:50:04 +0000825 */
826
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400827struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name,
Steven Whitehousee7f14f42006-10-31 21:45:08 -0500828 unsigned int mode, dev_t dev)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000829{
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100830 struct inode *inode = NULL;
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500831 struct gfs2_inode *dip = ghs->gh_gl->gl_object;
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400832 struct inode *dir = &dip->i_inode;
833 struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100834 struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 };
David Teiglandb3b94fa2006-01-16 16:50:04 +0000835 int error;
Steven Whitehouse4340fe62006-07-11 09:46:33 -0400836 u64 generation;
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100837 struct buffer_head *bh = NULL;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000838
839 if (!name->len || name->len > GFS2_FNAMESIZE)
Steven Whitehouse7359a192006-02-13 12:27:43 +0000840 return ERR_PTR(-ENAMETOOLONG);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000841
David Teiglandb3b94fa2006-01-16 16:50:04 +0000842 gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs);
843 error = gfs2_glock_nq(ghs);
844 if (error)
845 goto fail;
846
847 error = create_ok(dip, name, mode);
848 if (error)
849 goto fail_gunlock;
850
Steven Whitehousedbb7cae2007-05-15 15:37:50 +0100851 error = alloc_dinode(dip, &inum.no_addr, &generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000852 if (error)
853 goto fail_gunlock;
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100854 inum.no_formal_ino = generation;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000855
Steven Whitehouse28626e22006-11-22 11:13:21 -0500856 error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops,
857 LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1);
858 if (error)
859 goto fail_gunlock;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000860
Wendy Chenge9bd2b32007-08-24 09:15:01 -0400861 error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000862 if (error)
863 goto fail_gunlock2;
864
Steven Whitehouse8d8291a2009-08-27 15:51:07 +0100865 inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), inum.no_addr,
866 inum.no_formal_ino, 0);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400867 if (IS_ERR(inode))
David Teiglandb3b94fa2006-01-16 16:50:04 +0000868 goto fail_gunlock2;
869
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400870 error = gfs2_inode_refresh(GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000871 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100872 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000873
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400874 error = gfs2_acl_create(dip, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000875 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100876 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000877
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400878 error = gfs2_security_init(dip, GFS2_I(inode));
879 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100880 goto fail_gunlock2;
Ryan O'Harafcb47e0b2006-10-03 11:57:35 -0400881
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400882 error = link_dinode(dip, name, GFS2_I(inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000883 if (error)
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100884 goto fail_gunlock2;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000885
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100886 if (bh)
887 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000888 return inode;
David Teiglandb3b94fa2006-01-16 16:50:04 +0000889
Steven Whitehouse320dd102006-05-18 16:25:27 -0400890fail_gunlock2:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000891 gfs2_glock_dq_uninit(ghs + 1);
Julien Brunelbd1eb882008-09-01 10:51:22 +0200892 if (inode && !IS_ERR(inode))
Steven Whitehousee1cc8602007-06-07 11:47:52 +0100893 iput(inode);
Steven Whitehouse320dd102006-05-18 16:25:27 -0400894fail_gunlock:
David Teiglandb3b94fa2006-01-16 16:50:04 +0000895 gfs2_glock_dq(ghs);
Steven Whitehouse320dd102006-05-18 16:25:27 -0400896fail:
Steven Whitehousef91a0d32007-10-15 16:29:05 +0100897 if (bh)
898 brelse(bh);
Steven Whitehouse7359a192006-02-13 12:27:43 +0000899 return ERR_PTR(error);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000900}
901
Steven Whitehouse536baf02009-05-22 10:48:59 +0100902static int __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000903{
904 struct buffer_head *dibh;
905 int error;
906
907 error = gfs2_meta_inode_buffer(ip, &dibh);
908 if (!error) {
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400909 error = inode_setattr(&ip->i_inode, attr);
910 gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error);
Steven Whitehoused4e9c4c2006-01-18 11:19:28 +0000911 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
Steven Whitehouse539e5d62006-10-31 15:07:05 -0500912 gfs2_dinode_out(ip, dibh->b_data);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000913 brelse(dibh);
914 }
915 return error;
916}
917
918/**
919 * gfs2_setattr_simple -
920 * @ip:
921 * @attr:
922 *
923 * Called with a reference on the vnode.
924 *
925 * Returns: errno
926 */
927
928int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr)
929{
930 int error;
931
Steven Whitehouse5c676f62006-02-27 17:23:27 -0500932 if (current->journal_info)
David Teiglandb3b94fa2006-01-16 16:50:04 +0000933 return __gfs2_setattr_simple(ip, attr);
934
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400935 error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000936 if (error)
937 return error;
938
939 error = __gfs2_setattr_simple(ip, attr);
Steven Whitehousefeaa7bb2006-06-14 15:32:57 -0400940 gfs2_trans_end(GFS2_SB(&ip->i_inode));
David Teiglandb3b94fa2006-01-16 16:50:04 +0000941 return error;
942}
943
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100944void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf)
945{
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100946 struct gfs2_dinode *str = buf;
947
948 str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC);
949 str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI);
950 str->di_header.__pad0 = 0;
951 str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI);
952 str->di_header.__pad1 = 0;
953 str->di_num.no_addr = cpu_to_be64(ip->i_no_addr);
954 str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino);
955 str->di_mode = cpu_to_be32(ip->i_inode.i_mode);
956 str->di_uid = cpu_to_be32(ip->i_inode.i_uid);
957 str->di_gid = cpu_to_be32(ip->i_inode.i_gid);
958 str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink);
Steven Whitehousec9e98882008-11-04 09:47:33 +0000959 str->di_size = cpu_to_be64(ip->i_disksize);
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000960 str->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100961 str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec);
962 str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec);
963 str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec);
964
Steven Whitehousece276b02008-02-06 09:25:45 +0000965 str->di_goal_meta = cpu_to_be64(ip->i_goal);
966 str->di_goal_data = cpu_to_be64(ip->i_goal);
Steven Whitehousebcf0b5b2008-11-03 13:39:46 +0000967 str->di_generation = cpu_to_be64(ip->i_generation);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100968
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000969 str->di_flags = cpu_to_be32(ip->i_diskflags);
Steven Whitehouseecc30c72008-01-28 10:37:35 +0000970 str->di_height = cpu_to_be16(ip->i_height);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100971 str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) &&
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000972 !(ip->i_diskflags & GFS2_DIF_EXHASH) ?
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100973 GFS2_FORMAT_DE : 0);
Steven Whitehouse9a004502008-02-01 09:23:44 +0000974 str->di_depth = cpu_to_be16(ip->i_depth);
Steven Whitehousead6203f2008-11-03 13:59:19 +0000975 str->di_entries = cpu_to_be32(ip->i_entries);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100976
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000977 str->di_eattr = cpu_to_be64(ip->i_eattr);
Steven Whitehouse4bd91ba2007-06-05 09:39:18 +0100978 str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec);
979 str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec);
980 str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100981}
982
983void gfs2_dinode_print(const struct gfs2_inode *ip)
984{
Steven Whitehousebb8d8a62007-06-01 14:11:58 +0100985 printk(KERN_INFO " no_formal_ino = %llu\n",
986 (unsigned long long)ip->i_no_formal_ino);
987 printk(KERN_INFO " no_addr = %llu\n",
988 (unsigned long long)ip->i_no_addr);
Steven Whitehousec9e98882008-11-04 09:47:33 +0000989 printk(KERN_INFO " i_disksize = %llu\n",
990 (unsigned long long)ip->i_disksize);
Steven Whitehouse77658aa2008-02-12 14:17:27 +0000991 printk(KERN_INFO " blocks = %llu\n",
992 (unsigned long long)gfs2_get_inode_blocks(&ip->i_inode));
Steven Whitehousece276b02008-02-06 09:25:45 +0000993 printk(KERN_INFO " i_goal = %llu\n",
994 (unsigned long long)ip->i_goal);
Steven Whitehouse383f01f2008-11-04 10:05:22 +0000995 printk(KERN_INFO " i_diskflags = 0x%.8X\n", ip->i_diskflags);
Bob Petersonca390602008-01-28 11:15:57 -0600996 printk(KERN_INFO " i_height = %u\n", ip->i_height);
Steven Whitehouse9a004502008-02-01 09:23:44 +0000997 printk(KERN_INFO " i_depth = %u\n", ip->i_depth);
Steven Whitehousead6203f2008-11-03 13:59:19 +0000998 printk(KERN_INFO " i_entries = %u\n", ip->i_entries);
Steven Whitehouse3767ac22008-11-03 14:28:42 +0000999 printk(KERN_INFO " i_eattr = %llu\n",
1000 (unsigned long long)ip->i_eattr);
Steven Whitehousebb8d8a62007-06-01 14:11:58 +01001001}
1002