David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Steven Whitehouse | 3a8a9a1 | 2006-05-18 15:09:15 -0400 | [diff] [blame] | 3 | * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 4 | * |
| 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 Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 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 Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 17 | #include <linux/gfs2_ondisk.h> |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 18 | #include <linux/crc32.h> |
Fabio Massimo Di Nitto | 7d30859 | 2006-09-19 07:56:29 +0200 | [diff] [blame] | 19 | #include <linux/lm_interface.h> |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 20 | #include <linux/security.h> |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 21 | |
| 22 | #include "gfs2.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 23 | #include "incore.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 24 | #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 Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 34 | #include "ops_inode.h" |
| 35 | #include "quota.h" |
| 36 | #include "rgrp.h" |
| 37 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 38 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 39 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 40 | struct gfs2_inum_range_host { |
| 41 | u64 ir_start; |
| 42 | u64 ir_length; |
| 43 | }; |
| 44 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 45 | static int iget_test(struct inode *inode, void *opaque) |
| 46 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 47 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 48 | u64 *no_addr = opaque; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 49 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 50 | if (ip->i_no_addr == *no_addr && |
Steven Whitehouse | 1be3867 | 2007-03-01 10:00:53 +0000 | [diff] [blame] | 51 | inode->i_private != NULL) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 52 | return 1; |
| 53 | |
| 54 | return 0; |
| 55 | } |
| 56 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 57 | static int iget_set(struct inode *inode, void *opaque) |
| 58 | { |
| 59 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 60 | u64 *no_addr = opaque; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 61 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 62 | inode->i_ino = (unsigned long)*no_addr; |
| 63 | ip->i_no_addr = *no_addr; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 64 | return 0; |
| 65 | } |
| 66 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 67 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 68 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 69 | unsigned long hash = (unsigned long)no_addr; |
| 70 | return ilookup5(sb, hash, iget_test, &no_addr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 71 | } |
| 72 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 73 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 74 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 75 | unsigned long hash = (unsigned long)no_addr; |
| 76 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 77 | } |
| 78 | |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 79 | struct gfs2_skip_data { |
| 80 | u64 no_addr; |
| 81 | int skipped; |
| 82 | }; |
| 83 | |
| 84 | static 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 | |
| 99 | static 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 | |
| 111 | static 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 Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 122 | /** |
Wendy Cheng | 35dcc52 | 2007-06-27 17:07:53 -0400 | [diff] [blame] | 123 | * 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 | |
| 132 | void gfs2_set_iop(struct inode *inode) |
| 133 | { |
| 134 | umode_t mode = inode->i_mode; |
| 135 | |
| 136 | if (S_ISREG(mode)) { |
| 137 | inode->i_op = &gfs2_file_iops; |
| 138 | inode->i_fop = &gfs2_file_fops; |
Wendy Cheng | 35dcc52 | 2007-06-27 17:07:53 -0400 | [diff] [blame] | 139 | } else if (S_ISDIR(mode)) { |
| 140 | inode->i_op = &gfs2_dir_iops; |
| 141 | inode->i_fop = &gfs2_dir_fops; |
| 142 | } else if (S_ISLNK(mode)) { |
| 143 | inode->i_op = &gfs2_symlink_iops; |
| 144 | } else { |
| 145 | inode->i_op = &gfs2_dev_iops; |
| 146 | } |
| 147 | |
| 148 | unlock_new_inode(inode); |
| 149 | } |
| 150 | |
| 151 | /** |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 152 | * gfs2_inode_lookup - Lookup an inode |
| 153 | * @sb: The super block |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 154 | * @no_addr: The inode number |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 155 | * @type: The type of the inode |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 156 | * @skip_freeing: set this not return an inode if it is currently being freed. |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 157 | * |
| 158 | * Returns: A VFS inode, or an error |
| 159 | */ |
| 160 | |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame] | 161 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
| 162 | unsigned int type, |
| 163 | u64 no_addr, |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 164 | u64 no_formal_ino, int skip_freeing) |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 165 | { |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 166 | struct inode *inode; |
| 167 | struct gfs2_inode *ip; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 168 | struct gfs2_glock *io_gl; |
| 169 | int error; |
| 170 | |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 171 | if (skip_freeing) |
| 172 | inode = gfs2_iget_skip(sb, no_addr); |
| 173 | else |
| 174 | inode = gfs2_iget(sb, no_addr); |
| 175 | ip = GFS2_I(inode); |
| 176 | |
Steven Whitehouse | 26d83de | 2006-10-30 16:59:08 -0500 | [diff] [blame] | 177 | if (!inode) |
| 178 | return ERR_PTR(-ENOBUFS); |
| 179 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 180 | if (inode->i_state & I_NEW) { |
| 181 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Theodore Ts'o | bba9dfd | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 182 | inode->i_private = ip; |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame] | 183 | ip->i_no_formal_ino = no_formal_ino; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 184 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 185 | error = gfs2_glock_get(sdp, no_addr, &gfs2_inode_glops, CREATE, &ip->i_gl); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 186 | if (unlikely(error)) |
| 187 | goto fail; |
| 188 | ip->i_gl->gl_object = ip; |
| 189 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 190 | error = gfs2_glock_get(sdp, no_addr, &gfs2_iopen_glops, CREATE, &io_gl); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 191 | if (unlikely(error)) |
| 192 | goto fail_put; |
| 193 | |
Steven Whitehouse | bfded27 | 2006-11-01 16:05:38 -0500 | [diff] [blame] | 194 | set_bit(GIF_INVALID, &ip->i_flags); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 195 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
| 196 | if (unlikely(error)) |
| 197 | goto fail_iopen; |
Abhijith Das | d93cfa9 | 2007-06-11 08:22:32 +0100 | [diff] [blame] | 198 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 199 | |
| 200 | gfs2_glock_put(io_gl); |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 201 | |
Wendy Cheng | 35dcc52 | 2007-06-27 17:07:53 -0400 | [diff] [blame] | 202 | if ((type == DT_UNKNOWN) && (no_formal_ino == 0)) |
| 203 | goto gfs2_nfsbypass; |
| 204 | |
| 205 | inode->i_mode = DT2IF(type); |
| 206 | |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 207 | /* |
| 208 | * We must read the inode in order to work out its type in |
| 209 | * this case. Note that this doesn't happen often as we normally |
| 210 | * know the type beforehand. This code path only occurs during |
| 211 | * unlinked inode recovery (where it is safe to do this glock, |
| 212 | * which is not true in the general case). |
| 213 | */ |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 214 | if (type == DT_UNKNOWN) { |
| 215 | struct gfs2_holder gh; |
| 216 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 217 | if (unlikely(error)) |
| 218 | goto fail_glock; |
| 219 | /* Inode is now uptodate */ |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 220 | gfs2_glock_dq_uninit(&gh); |
| 221 | } |
| 222 | |
Wendy Cheng | 35dcc52 | 2007-06-27 17:07:53 -0400 | [diff] [blame] | 223 | gfs2_set_iop(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 224 | } |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 225 | |
Wendy Cheng | 35dcc52 | 2007-06-27 17:07:53 -0400 | [diff] [blame] | 226 | gfs2_nfsbypass: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 227 | return inode; |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 228 | fail_glock: |
| 229 | gfs2_glock_dq(&ip->i_iopen_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 230 | fail_iopen: |
| 231 | gfs2_glock_put(io_gl); |
| 232 | fail_put: |
| 233 | ip->i_gl->gl_object = NULL; |
| 234 | gfs2_glock_put(ip->i_gl); |
| 235 | fail: |
| 236 | iput(inode); |
| 237 | return ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 238 | } |
| 239 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 240 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 241 | { |
| 242 | struct gfs2_dinode_host *di = &ip->i_di; |
| 243 | const struct gfs2_dinode *str = buf; |
| 244 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 245 | if (ip->i_no_addr != be64_to_cpu(str->di_num.no_addr)) { |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 246 | if (gfs2_consist_inode(ip)) |
| 247 | gfs2_dinode_print(ip); |
| 248 | return -EIO; |
| 249 | } |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 250 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 251 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 252 | ip->i_inode.i_rdev = 0; |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 253 | switch (ip->i_inode.i_mode & S_IFMT) { |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 254 | case S_IFBLK: |
| 255 | case S_IFCHR: |
| 256 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), |
| 257 | be32_to_cpu(str->di_minor)); |
| 258 | break; |
| 259 | }; |
| 260 | |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 261 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
| 262 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 263 | /* |
| 264 | * We will need to review setting the nlink count here in the |
| 265 | * light of the forthcoming ro bind mount work. This is a reminder |
| 266 | * to do that. |
| 267 | */ |
| 268 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 269 | di->di_size = be64_to_cpu(str->di_size); |
Steven Whitehouse | 9e2dbda | 2006-11-08 15:45:46 -0500 | [diff] [blame] | 270 | i_size_write(&ip->i_inode, di->di_size); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 271 | di->di_blocks = be64_to_cpu(str->di_blocks); |
Steven Whitehouse | 9e2dbda | 2006-11-08 15:45:46 -0500 | [diff] [blame] | 272 | gfs2_set_inode_blocks(&ip->i_inode); |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 273 | ip->i_inode.i_atime.tv_sec = be64_to_cpu(str->di_atime); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 274 | ip->i_inode.i_atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 275 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 276 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 277 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 278 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 279 | |
| 280 | di->di_goal_meta = be64_to_cpu(str->di_goal_meta); |
| 281 | di->di_goal_data = be64_to_cpu(str->di_goal_data); |
| 282 | di->di_generation = be64_to_cpu(str->di_generation); |
| 283 | |
| 284 | di->di_flags = be32_to_cpu(str->di_flags); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 285 | gfs2_set_inode_flags(&ip->i_inode); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 286 | di->di_height = be16_to_cpu(str->di_height); |
| 287 | |
| 288 | di->di_depth = be16_to_cpu(str->di_depth); |
| 289 | di->di_entries = be32_to_cpu(str->di_entries); |
| 290 | |
| 291 | di->di_eattr = be64_to_cpu(str->di_eattr); |
Steven Whitehouse | 5561093 | 2007-10-17 08:47:38 +0100 | [diff] [blame] | 292 | if (S_ISREG(ip->i_inode.i_mode)) |
| 293 | gfs2_set_aops(&ip->i_inode); |
| 294 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 295 | return 0; |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 296 | } |
| 297 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 298 | /** |
| 299 | * gfs2_inode_refresh - Refresh the incore copy of the dinode |
| 300 | * @ip: The GFS2 inode |
| 301 | * |
| 302 | * Returns: errno |
| 303 | */ |
| 304 | |
| 305 | int gfs2_inode_refresh(struct gfs2_inode *ip) |
| 306 | { |
| 307 | struct buffer_head *dibh; |
| 308 | int error; |
| 309 | |
| 310 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 311 | if (error) |
| 312 | return error; |
| 313 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 314 | if (gfs2_metatype_check(GFS2_SB(&ip->i_inode), dibh, GFS2_METATYPE_DI)) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 315 | brelse(dibh); |
| 316 | return -EIO; |
| 317 | } |
| 318 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 319 | error = gfs2_dinode_in(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 320 | brelse(dibh); |
Steven Whitehouse | bfded27 | 2006-11-01 16:05:38 -0500 | [diff] [blame] | 321 | clear_bit(GIF_INVALID, &ip->i_flags); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 322 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 323 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 324 | } |
| 325 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 326 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 327 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 328 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 329 | struct gfs2_alloc *al; |
| 330 | struct gfs2_rgrpd *rgd; |
| 331 | int error; |
| 332 | |
| 333 | if (ip->i_di.di_blocks != 1) { |
| 334 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 335 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 336 | return -EIO; |
| 337 | } |
| 338 | |
| 339 | al = gfs2_alloc_get(ip); |
| 340 | |
| 341 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 342 | if (error) |
| 343 | goto out; |
| 344 | |
| 345 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); |
| 346 | if (error) |
| 347 | goto out_qs; |
| 348 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 349 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 350 | if (!rgd) { |
| 351 | gfs2_consist_inode(ip); |
| 352 | error = -EIO; |
| 353 | goto out_rindex_relse; |
| 354 | } |
| 355 | |
| 356 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, |
| 357 | &al->al_rgd_gh); |
| 358 | if (error) |
| 359 | goto out_rindex_relse; |
| 360 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 361 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS + RES_QUOTA, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 362 | if (error) |
| 363 | goto out_rg_gunlock; |
| 364 | |
| 365 | gfs2_trans_add_gl(ip->i_gl); |
| 366 | |
| 367 | gfs2_free_di(rgd, ip); |
| 368 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 369 | gfs2_trans_end(sdp); |
| 370 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
| 371 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 372 | out_rg_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 373 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 374 | out_rindex_relse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 375 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 376 | out_qs: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 377 | gfs2_quota_unhold(ip); |
Steven Whitehouse | 3632752 | 2006-04-28 10:46:21 -0400 | [diff] [blame] | 378 | out: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 379 | gfs2_alloc_put(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 380 | return error; |
| 381 | } |
| 382 | |
| 383 | /** |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 384 | * gfs2_change_nlink - Change nlink count on inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 385 | * @ip: The GFS2 inode |
| 386 | * @diff: The change in the nlink count required |
| 387 | * |
| 388 | * Returns: errno |
| 389 | */ |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 390 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 391 | { |
| 392 | struct buffer_head *dibh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 393 | u32 nlink; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 394 | int error; |
| 395 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 396 | BUG_ON(diff != 1 && diff != -1); |
| 397 | nlink = ip->i_inode.i_nlink + diff; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 398 | |
| 399 | /* If we are reducing the nlink count, but the new value ends up being |
| 400 | bigger than the old one, we must have underflowed. */ |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 401 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 402 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 403 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 404 | return -EIO; |
| 405 | } |
| 406 | |
| 407 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 408 | if (error) |
| 409 | return error; |
| 410 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 411 | if (diff > 0) |
| 412 | inc_nlink(&ip->i_inode); |
| 413 | else |
| 414 | drop_nlink(&ip->i_inode); |
| 415 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 416 | ip->i_inode.i_ctime = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 417 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 418 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 419 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 420 | brelse(dibh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 421 | mark_inode_dirty(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 422 | |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 423 | if (ip->i_inode.i_nlink == 0) |
Russell Cattelan | ddee760 | 2007-01-29 17:13:44 -0600 | [diff] [blame] | 424 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 425 | |
S. Wendy Cheng | 5509826 | 2007-01-18 15:56:34 -0500 | [diff] [blame] | 426 | return error; |
| 427 | } |
| 428 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 429 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
| 430 | { |
| 431 | struct qstr qstr; |
Russell Cattelan | 6c93fd1 | 2007-01-08 17:47:51 -0600 | [diff] [blame] | 432 | struct inode *inode; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 433 | gfs2_str2qstr(&qstr, name); |
Russell Cattelan | 6c93fd1 | 2007-01-08 17:47:51 -0600 | [diff] [blame] | 434 | inode = gfs2_lookupi(dip, &qstr, 1, NULL); |
| 435 | /* gfs2_lookupi has inconsistent callers: vfs |
| 436 | * related routines expect NULL for no entry found, |
| 437 | * gfs2_lookup_simple callers expect ENOENT |
| 438 | * and do not check for NULL. |
| 439 | */ |
| 440 | if (inode == NULL) |
| 441 | return ERR_PTR(-ENOENT); |
| 442 | else |
| 443 | return inode; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 447 | /** |
| 448 | * gfs2_lookupi - Look up a filename in a directory and return its inode |
| 449 | * @d_gh: An initialized holder for the directory glock |
| 450 | * @name: The name of the inode to look for |
| 451 | * @is_root: If 1, ignore the caller's permissions |
| 452 | * @i_gh: An uninitialized holder for the new inode glock |
| 453 | * |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 454 | * This can be called via the VFS filldir function when NFS is doing |
| 455 | * a readdirplus and the inode which its intending to stat isn't |
| 456 | * already in cache. In this case we must not take the directory glock |
| 457 | * again, since the readdir call will have already taken that lock. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 458 | * |
| 459 | * Returns: errno |
| 460 | */ |
| 461 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 462 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
| 463 | int is_root, struct nameidata *nd) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 464 | { |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 465 | struct super_block *sb = dir->i_sb; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 466 | struct gfs2_inode *dip = GFS2_I(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 467 | struct gfs2_holder d_gh; |
akpm@linux-foundation.org | 037bcbb | 2007-06-08 16:42:14 -0700 | [diff] [blame] | 468 | int error = 0; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 469 | struct inode *inode = NULL; |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 470 | int unlock = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 471 | |
| 472 | if (!name->len || name->len > GFS2_FNAMESIZE) |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 473 | return ERR_PTR(-ENAMETOOLONG); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 474 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 475 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
| 476 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && |
| 477 | dir == sb->s_root->d_inode)) { |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 478 | igrab(dir); |
| 479 | return dir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 480 | } |
| 481 | |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 482 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) { |
| 483 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
| 484 | if (error) |
| 485 | return ERR_PTR(error); |
| 486 | unlock = 1; |
| 487 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 488 | |
| 489 | if (!is_root) { |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 490 | error = permission(dir, MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 491 | if (error) |
| 492 | goto out; |
| 493 | } |
| 494 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 495 | inode = gfs2_dir_search(dir, name); |
| 496 | if (IS_ERR(inode)) |
| 497 | error = PTR_ERR(inode); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 498 | out: |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 499 | if (unlock) |
| 500 | gfs2_glock_dq_uninit(&d_gh); |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 501 | if (error == -ENOENT) |
| 502 | return NULL; |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 503 | return inode ? inode : ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 504 | } |
| 505 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 506 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
| 507 | { |
| 508 | const struct gfs2_inum_range *str = buf; |
| 509 | |
| 510 | ir->ir_start = be64_to_cpu(str->ir_start); |
| 511 | ir->ir_length = be64_to_cpu(str->ir_length); |
| 512 | } |
| 513 | |
| 514 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) |
| 515 | { |
| 516 | struct gfs2_inum_range *str = buf; |
| 517 | |
| 518 | str->ir_start = cpu_to_be64(ir->ir_start); |
| 519 | str->ir_length = cpu_to_be64(ir->ir_length); |
| 520 | } |
| 521 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 522 | static int pick_formal_ino_1(struct gfs2_sbd *sdp, u64 *formal_ino) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 523 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 524 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 525 | struct buffer_head *bh; |
Al Viro | e697264 | 2006-10-13 21:29:46 -0400 | [diff] [blame] | 526 | struct gfs2_inum_range_host ir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 527 | int error; |
| 528 | |
| 529 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| 530 | if (error) |
| 531 | return error; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 532 | mutex_lock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 533 | |
| 534 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 535 | if (error) { |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 536 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 537 | gfs2_trans_end(sdp); |
| 538 | return error; |
| 539 | } |
| 540 | |
| 541 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 542 | |
| 543 | if (ir.ir_length) { |
| 544 | *formal_ino = ir.ir_start++; |
| 545 | ir.ir_length--; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 546 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 547 | gfs2_inum_range_out(&ir, |
| 548 | bh->b_data + sizeof(struct gfs2_dinode)); |
| 549 | brelse(bh); |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 550 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 551 | gfs2_trans_end(sdp); |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | brelse(bh); |
| 556 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 557 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 558 | gfs2_trans_end(sdp); |
| 559 | |
| 560 | return 1; |
| 561 | } |
| 562 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 563 | static int pick_formal_ino_2(struct gfs2_sbd *sdp, u64 *formal_ino) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 564 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 565 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
| 566 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 567 | struct gfs2_holder gh; |
| 568 | struct buffer_head *bh; |
Al Viro | e697264 | 2006-10-13 21:29:46 -0400 | [diff] [blame] | 569 | struct gfs2_inum_range_host ir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 570 | int error; |
| 571 | |
| 572 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 573 | if (error) |
| 574 | return error; |
| 575 | |
| 576 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); |
| 577 | if (error) |
| 578 | goto out; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 579 | mutex_lock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 580 | |
| 581 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 582 | if (error) |
| 583 | goto out_end_trans; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 584 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 585 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 586 | |
| 587 | if (!ir.ir_length) { |
| 588 | struct buffer_head *m_bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 589 | u64 x, y; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 590 | __be64 z; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 591 | |
| 592 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); |
| 593 | if (error) |
| 594 | goto out_brelse; |
| 595 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 596 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
| 597 | x = y = be64_to_cpu(z); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 598 | ir.ir_start = x; |
| 599 | ir.ir_length = GFS2_INUM_QUANTUM; |
| 600 | x += GFS2_INUM_QUANTUM; |
| 601 | if (x < y) |
| 602 | gfs2_consist_inode(m_ip); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 603 | z = cpu_to_be64(x); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 604 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 605 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 606 | |
| 607 | brelse(m_bh); |
| 608 | } |
| 609 | |
| 610 | *formal_ino = ir.ir_start++; |
| 611 | ir.ir_length--; |
| 612 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 613 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 614 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 615 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 616 | out_brelse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 617 | brelse(bh); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 618 | out_end_trans: |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 619 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 620 | gfs2_trans_end(sdp); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 621 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 622 | gfs2_glock_dq_uninit(&gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 623 | return error; |
| 624 | } |
| 625 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 626 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 627 | { |
| 628 | int error; |
| 629 | |
| 630 | error = pick_formal_ino_1(sdp, inum); |
| 631 | if (error <= 0) |
| 632 | return error; |
| 633 | |
| 634 | error = pick_formal_ino_2(sdp, inum); |
| 635 | |
| 636 | return error; |
| 637 | } |
| 638 | |
| 639 | /** |
| 640 | * create_ok - OK to create a new on-disk inode here? |
| 641 | * @dip: Directory in which dinode is to be created |
| 642 | * @name: Name of new dinode |
| 643 | * @mode: |
| 644 | * |
| 645 | * Returns: errno |
| 646 | */ |
| 647 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 648 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 649 | unsigned int mode) |
| 650 | { |
| 651 | int error; |
| 652 | |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 653 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 654 | if (error) |
| 655 | return error; |
| 656 | |
| 657 | /* Don't create entries in an unlinked directory */ |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 658 | if (!dip->i_inode.i_nlink) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 659 | return -EPERM; |
| 660 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 661 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 662 | switch (error) { |
| 663 | case -ENOENT: |
| 664 | error = 0; |
| 665 | break; |
| 666 | case 0: |
| 667 | return -EEXIST; |
| 668 | default: |
| 669 | return error; |
| 670 | } |
| 671 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 672 | if (dip->i_di.di_entries == (u32)-1) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 673 | return -EFBIG; |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 674 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 675 | return -EMLINK; |
| 676 | |
| 677 | return 0; |
| 678 | } |
| 679 | |
| 680 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, |
| 681 | unsigned int *uid, unsigned int *gid) |
| 682 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 683 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 684 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 685 | if (S_ISDIR(*mode)) |
| 686 | *mode |= S_ISUID; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 687 | else if (dip->i_inode.i_uid != current->fsuid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 688 | *mode &= ~07111; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 689 | *uid = dip->i_inode.i_uid; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 690 | } else |
| 691 | *uid = current->fsuid; |
| 692 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 693 | if (dip->i_inode.i_mode & S_ISGID) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 694 | if (S_ISDIR(*mode)) |
| 695 | *mode |= S_ISGID; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 696 | *gid = dip->i_inode.i_gid; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 697 | } else |
| 698 | *gid = current->fsgid; |
| 699 | } |
| 700 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 701 | static int alloc_dinode(struct gfs2_inode *dip, u64 *no_addr, u64 *generation) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 702 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 703 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 704 | int error; |
| 705 | |
| 706 | gfs2_alloc_get(dip); |
| 707 | |
| 708 | dip->i_alloc.al_requested = RES_DINODE; |
| 709 | error = gfs2_inplace_reserve(dip); |
| 710 | if (error) |
| 711 | goto out; |
| 712 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 713 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 714 | if (error) |
| 715 | goto out_ipreserv; |
| 716 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 717 | *no_addr = gfs2_alloc_di(dip, generation); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 718 | |
| 719 | gfs2_trans_end(sdp); |
| 720 | |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 721 | out_ipreserv: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 722 | gfs2_inplace_release(dip); |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 723 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 724 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 725 | return error; |
| 726 | } |
| 727 | |
| 728 | /** |
| 729 | * init_dinode - Fill in a new dinode structure |
| 730 | * @dip: the directory this inode is being created in |
| 731 | * @gl: The glock covering the new inode |
| 732 | * @inum: the inode number |
| 733 | * @mode: the file permissions |
| 734 | * @uid: |
| 735 | * @gid: |
| 736 | * |
| 737 | */ |
| 738 | |
| 739 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, |
Al Viro | 629a21e | 2006-10-13 22:51:24 -0400 | [diff] [blame] | 740 | const struct gfs2_inum_host *inum, unsigned int mode, |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 741 | unsigned int uid, unsigned int gid, |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 742 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 743 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 744 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 745 | struct gfs2_dinode *di; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 746 | struct buffer_head *dibh; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 747 | struct timespec tv = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 748 | |
| 749 | dibh = gfs2_meta_new(gl, inum->no_addr); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 750 | gfs2_trans_add_bh(gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 751 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
| 752 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 753 | di = (struct gfs2_dinode *)dibh->b_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 754 | |
Steven Whitehouse | 2442a09 | 2006-01-30 11:49:32 +0000 | [diff] [blame] | 755 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
| 756 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 757 | di->di_mode = cpu_to_be32(mode); |
| 758 | di->di_uid = cpu_to_be32(uid); |
| 759 | di->di_gid = cpu_to_be32(gid); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 760 | di->di_nlink = 0; |
| 761 | di->di_size = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 762 | di->di_blocks = cpu_to_be64(1); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 763 | di->di_atime = di->di_mtime = di->di_ctime = cpu_to_be64(tv.tv_sec); |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 764 | di->di_major = cpu_to_be32(MAJOR(dev)); |
| 765 | di->di_minor = cpu_to_be32(MINOR(dev)); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 766 | di->di_goal_meta = di->di_goal_data = cpu_to_be64(inum->no_addr); |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 767 | di->di_generation = cpu_to_be64(*generation); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 768 | di->di_flags = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 769 | |
| 770 | if (S_ISREG(mode)) { |
| 771 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || |
| 772 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 773 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 774 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
| 775 | gfs2_tune_get(sdp, gt_new_files_directio)) |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 776 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 777 | } else if (S_ISDIR(mode)) { |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 778 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
| 779 | GFS2_DIF_INHERIT_DIRECTIO); |
| 780 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
| 781 | GFS2_DIF_INHERIT_JDATA); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 782 | } |
| 783 | |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 784 | di->__pad1 = 0; |
Steven Whitehouse | a9583c7 | 2006-11-01 20:09:14 -0500 | [diff] [blame] | 785 | di->di_payload_format = cpu_to_be32(S_ISDIR(mode) ? GFS2_FORMAT_DE : 0); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 786 | di->di_height = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 787 | di->__pad2 = 0; |
| 788 | di->__pad3 = 0; |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 789 | di->di_depth = 0; |
| 790 | di->di_entries = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 791 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 792 | di->di_eattr = 0; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 793 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
| 794 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); |
| 795 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 796 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 797 | |
| 798 | set_buffer_uptodate(dibh); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 799 | |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 800 | *bhp = dibh; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 801 | } |
| 802 | |
| 803 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, |
Al Viro | 629a21e | 2006-10-13 22:51:24 -0400 | [diff] [blame] | 804 | unsigned int mode, const struct gfs2_inum_host *inum, |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 805 | const u64 *generation, dev_t dev, struct buffer_head **bhp) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 806 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 807 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 808 | unsigned int uid, gid; |
| 809 | int error; |
| 810 | |
| 811 | munge_mode_uid_gid(dip, &mode, &uid, &gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 812 | gfs2_alloc_get(dip); |
| 813 | |
| 814 | error = gfs2_quota_lock(dip, uid, gid); |
| 815 | if (error) |
| 816 | goto out; |
| 817 | |
| 818 | error = gfs2_quota_check(dip, uid, gid); |
| 819 | if (error) |
| 820 | goto out_quota; |
| 821 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 822 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 823 | if (error) |
| 824 | goto out_quota; |
| 825 | |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 826 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev, bhp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 827 | gfs2_quota_change(dip, +1, uid, gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 828 | gfs2_trans_end(sdp); |
| 829 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 830 | out_quota: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 831 | gfs2_quota_unlock(dip); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 832 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 833 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 834 | return error; |
| 835 | } |
| 836 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 837 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
| 838 | struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 839 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 840 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 841 | struct gfs2_alloc *al; |
| 842 | int alloc_required; |
| 843 | struct buffer_head *dibh; |
| 844 | int error; |
| 845 | |
| 846 | al = gfs2_alloc_get(dip); |
| 847 | |
| 848 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 849 | if (error) |
| 850 | goto fail; |
| 851 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 852 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 853 | if (alloc_required < 0) |
| 854 | goto fail; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 855 | if (alloc_required) { |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 856 | error = gfs2_quota_check(dip, dip->i_inode.i_uid, dip->i_inode.i_gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 857 | if (error) |
| 858 | goto fail_quota_locks; |
| 859 | |
| 860 | al->al_requested = sdp->sd_max_dirres; |
| 861 | |
| 862 | error = gfs2_inplace_reserve(dip); |
| 863 | if (error) |
| 864 | goto fail_quota_locks; |
| 865 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 866 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 867 | al->al_rgd->rd_length + |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 868 | 2 * RES_DINODE + |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 869 | RES_STATFS + RES_QUOTA, 0); |
| 870 | if (error) |
| 871 | goto fail_ipreserv; |
| 872 | } else { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 873 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 874 | if (error) |
| 875 | goto fail_quota_locks; |
| 876 | } |
| 877 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 878 | error = gfs2_dir_add(&dip->i_inode, name, ip, IF2DT(ip->i_inode.i_mode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 879 | if (error) |
| 880 | goto fail_end_trans; |
| 881 | |
| 882 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 883 | if (error) |
| 884 | goto fail_end_trans; |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 885 | ip->i_inode.i_nlink = 1; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 886 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 887 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 888 | brelse(dibh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 889 | return 0; |
| 890 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 891 | fail_end_trans: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 892 | gfs2_trans_end(sdp); |
| 893 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 894 | fail_ipreserv: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 895 | if (dip->i_alloc.al_rgd) |
| 896 | gfs2_inplace_release(dip); |
| 897 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 898 | fail_quota_locks: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 899 | gfs2_quota_unlock(dip); |
| 900 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 901 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 902 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 903 | return error; |
| 904 | } |
| 905 | |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 906 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
| 907 | { |
| 908 | int err; |
| 909 | size_t len; |
| 910 | void *value; |
| 911 | char *name; |
| 912 | struct gfs2_ea_request er; |
| 913 | |
| 914 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, |
| 915 | &name, &value, &len); |
| 916 | |
| 917 | if (err) { |
| 918 | if (err == -EOPNOTSUPP) |
| 919 | return 0; |
| 920 | return err; |
| 921 | } |
| 922 | |
| 923 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 924 | |
| 925 | er.er_type = GFS2_EATYPE_SECURITY; |
| 926 | er.er_name = name; |
| 927 | er.er_data = value; |
| 928 | er.er_name_len = strlen(name); |
| 929 | er.er_data_len = len; |
| 930 | |
| 931 | err = gfs2_ea_set_i(ip, &er); |
| 932 | |
| 933 | kfree(value); |
| 934 | kfree(name); |
| 935 | |
| 936 | return err; |
| 937 | } |
| 938 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 939 | /** |
| 940 | * gfs2_createi - Create a new inode |
| 941 | * @ghs: An array of two holders |
| 942 | * @name: The name of the new file |
| 943 | * @mode: the permissions on the new inode |
| 944 | * |
| 945 | * @ghs[0] is an initialized holder for the directory |
| 946 | * @ghs[1] is the holder for the inode lock |
| 947 | * |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 948 | * If the return value is not NULL, the glocks on both the directory and the new |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 949 | * file are held. A transaction has been started and an inplace reservation |
| 950 | * is held, as well. |
| 951 | * |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 952 | * Returns: An inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 953 | */ |
| 954 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 955 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 956 | unsigned int mode, dev_t dev) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 957 | { |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 958 | struct inode *inode = NULL; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 959 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 960 | struct inode *dir = &dip->i_inode; |
| 961 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 962 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 963 | int error; |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 964 | u64 generation; |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 965 | struct buffer_head *bh = NULL; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 966 | |
| 967 | if (!name->len || name->len > GFS2_FNAMESIZE) |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 968 | return ERR_PTR(-ENAMETOOLONG); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 969 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 970 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
| 971 | error = gfs2_glock_nq(ghs); |
| 972 | if (error) |
| 973 | goto fail; |
| 974 | |
| 975 | error = create_ok(dip, name, mode); |
| 976 | if (error) |
| 977 | goto fail_gunlock; |
| 978 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 979 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 980 | if (error) |
| 981 | goto fail_gunlock; |
| 982 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 983 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 984 | if (error) |
| 985 | goto fail_gunlock; |
| 986 | |
Steven Whitehouse | 28626e2 | 2006-11-22 11:13:21 -0500 | [diff] [blame] | 987 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
| 988 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
| 989 | if (error) |
| 990 | goto fail_gunlock; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 991 | |
Wendy Cheng | e9bd2b3 | 2007-08-24 09:15:01 -0400 | [diff] [blame] | 992 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev, &bh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 993 | if (error) |
| 994 | goto fail_gunlock2; |
| 995 | |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame] | 996 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
| 997 | inum.no_addr, |
Benjamin Marzinski | 7a9f53b | 2007-09-18 13:33:18 -0500 | [diff] [blame] | 998 | inum.no_formal_ino, 0); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 999 | if (IS_ERR(inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1000 | goto fail_gunlock2; |
| 1001 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1002 | error = gfs2_inode_refresh(GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1003 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 1004 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1005 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1006 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1007 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 1008 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1009 | |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 1010 | error = gfs2_security_init(dip, GFS2_I(inode)); |
| 1011 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 1012 | goto fail_gunlock2; |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 1013 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1014 | error = link_dinode(dip, name, GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1015 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 1016 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1017 | |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 1018 | if (bh) |
| 1019 | brelse(bh); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1020 | if (!inode) |
| 1021 | return ERR_PTR(-ENOMEM); |
| 1022 | return inode; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1023 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 1024 | fail_gunlock2: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1025 | gfs2_glock_dq_uninit(ghs + 1); |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 1026 | if (inode) |
| 1027 | iput(inode); |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 1028 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1029 | gfs2_glock_dq(ghs); |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 1030 | fail: |
Steven Whitehouse | f91a0d3 | 2007-10-15 16:29:05 +0100 | [diff] [blame] | 1031 | if (bh) |
| 1032 | brelse(bh); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1033 | return ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1034 | } |
| 1035 | |
| 1036 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1037 | * gfs2_rmdiri - Remove a directory |
| 1038 | * @dip: The parent directory of the directory to be removed |
| 1039 | * @name: The name of the directory to be removed |
| 1040 | * @ip: The GFS2 inode of the directory to be removed |
| 1041 | * |
| 1042 | * Assumes Glocks on dip and ip are held |
| 1043 | * |
| 1044 | * Returns: errno |
| 1045 | */ |
| 1046 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1047 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
| 1048 | struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1049 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1050 | struct qstr dotname; |
| 1051 | int error; |
| 1052 | |
| 1053 | if (ip->i_di.di_entries != 2) { |
| 1054 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 1055 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1056 | return -EIO; |
| 1057 | } |
| 1058 | |
| 1059 | error = gfs2_dir_del(dip, name); |
| 1060 | if (error) |
| 1061 | return error; |
| 1062 | |
| 1063 | error = gfs2_change_nlink(dip, -1); |
| 1064 | if (error) |
| 1065 | return error; |
| 1066 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 1067 | gfs2_str2qstr(&dotname, "."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1068 | error = gfs2_dir_del(ip, &dotname); |
| 1069 | if (error) |
| 1070 | return error; |
| 1071 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1072 | gfs2_str2qstr(&dotname, ".."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1073 | error = gfs2_dir_del(ip, &dotname); |
| 1074 | if (error) |
| 1075 | return error; |
| 1076 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 1077 | /* It looks odd, but it really should be done twice */ |
| 1078 | error = gfs2_change_nlink(ip, -1); |
| 1079 | if (error) |
| 1080 | return error; |
| 1081 | |
| 1082 | error = gfs2_change_nlink(ip, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1083 | if (error) |
| 1084 | return error; |
| 1085 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1086 | return error; |
| 1087 | } |
| 1088 | |
| 1089 | /* |
| 1090 | * gfs2_unlink_ok - check to see that a inode is still in a directory |
| 1091 | * @dip: the directory |
| 1092 | * @name: the name of the file |
| 1093 | * @ip: the inode |
| 1094 | * |
| 1095 | * Assumes that the lock on (at least) @dip is held. |
| 1096 | * |
| 1097 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't |
| 1098 | */ |
| 1099 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1100 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 1101 | const struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1102 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1103 | int error; |
| 1104 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1105 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1106 | return -EPERM; |
| 1107 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 1108 | if ((dip->i_inode.i_mode & S_ISVTX) && |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 1109 | dip->i_inode.i_uid != current->fsuid && |
| 1110 | ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1111 | return -EPERM; |
| 1112 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1113 | if (IS_APPEND(&dip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1114 | return -EPERM; |
| 1115 | |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 1116 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1117 | if (error) |
| 1118 | return error; |
| 1119 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 1120 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1121 | if (error) |
| 1122 | return error; |
| 1123 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1124 | return 0; |
| 1125 | } |
| 1126 | |
| 1127 | /* |
| 1128 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory |
| 1129 | * @this: move this |
| 1130 | * @to: to here |
| 1131 | * |
| 1132 | * Follow @to back to the root and make sure we don't encounter @this |
| 1133 | * Assumes we already hold the rename lock. |
| 1134 | * |
| 1135 | * Returns: errno |
| 1136 | */ |
| 1137 | |
| 1138 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) |
| 1139 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1140 | struct inode *dir = &to->i_inode; |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 1141 | struct super_block *sb = dir->i_sb; |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1142 | struct inode *tmp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1143 | struct qstr dotdot; |
| 1144 | int error = 0; |
| 1145 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 1146 | gfs2_str2qstr(&dotdot, ".."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1147 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1148 | igrab(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1149 | |
| 1150 | for (;;) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1151 | if (dir == &this->i_inode) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1152 | error = -EINVAL; |
| 1153 | break; |
| 1154 | } |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 1155 | if (dir == sb->s_root->d_inode) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1156 | error = 0; |
| 1157 | break; |
| 1158 | } |
| 1159 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 1160 | tmp = gfs2_lookupi(dir, &dotdot, 1, NULL); |
| 1161 | if (IS_ERR(tmp)) { |
| 1162 | error = PTR_ERR(tmp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1163 | break; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 1164 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1165 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1166 | iput(dir); |
| 1167 | dir = tmp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1168 | } |
| 1169 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1170 | iput(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1171 | |
| 1172 | return error; |
| 1173 | } |
| 1174 | |
| 1175 | /** |
| 1176 | * gfs2_readlinki - return the contents of a symlink |
| 1177 | * @ip: the symlink's inode |
| 1178 | * @buf: a pointer to the buffer to be filled |
| 1179 | * @len: a pointer to the length of @buf |
| 1180 | * |
| 1181 | * If @buf is too small, a piece of memory is kmalloc()ed and needs |
| 1182 | * to be freed by the caller. |
| 1183 | * |
| 1184 | * Returns: errno |
| 1185 | */ |
| 1186 | |
| 1187 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) |
| 1188 | { |
| 1189 | struct gfs2_holder i_gh; |
| 1190 | struct buffer_head *dibh; |
| 1191 | unsigned int x; |
| 1192 | int error; |
| 1193 | |
| 1194 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); |
| 1195 | error = gfs2_glock_nq_atime(&i_gh); |
| 1196 | if (error) { |
| 1197 | gfs2_holder_uninit(&i_gh); |
| 1198 | return error; |
| 1199 | } |
| 1200 | |
| 1201 | if (!ip->i_di.di_size) { |
| 1202 | gfs2_consist_inode(ip); |
| 1203 | error = -EIO; |
| 1204 | goto out; |
| 1205 | } |
| 1206 | |
| 1207 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1208 | if (error) |
| 1209 | goto out; |
| 1210 | |
| 1211 | x = ip->i_di.di_size + 1; |
| 1212 | if (x > *len) { |
| 1213 | *buf = kmalloc(x, GFP_KERNEL); |
| 1214 | if (!*buf) { |
| 1215 | error = -ENOMEM; |
| 1216 | goto out_brelse; |
| 1217 | } |
| 1218 | } |
| 1219 | |
| 1220 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); |
| 1221 | *len = x; |
| 1222 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1223 | out_brelse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1224 | brelse(dibh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1225 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1226 | gfs2_glock_dq_uninit(&i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1227 | return error; |
| 1228 | } |
| 1229 | |
| 1230 | /** |
| 1231 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and |
| 1232 | * conditionally update the inode's atime |
| 1233 | * @gh: the holder to acquire |
| 1234 | * |
| 1235 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap |
| 1236 | * Update if the difference between the current time and the inode's current |
| 1237 | * atime is greater than an interval specified at mount. |
| 1238 | * |
| 1239 | * Returns: errno |
| 1240 | */ |
| 1241 | |
| 1242 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) |
| 1243 | { |
| 1244 | struct gfs2_glock *gl = gh->gh_gl; |
| 1245 | struct gfs2_sbd *sdp = gl->gl_sbd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1246 | struct gfs2_inode *ip = gl->gl_object; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1247 | s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1248 | unsigned int state; |
| 1249 | int flags; |
| 1250 | int error; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1251 | struct timespec tv = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1252 | |
| 1253 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || |
| 1254 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || |
| 1255 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) |
| 1256 | return -EINVAL; |
| 1257 | |
| 1258 | state = gh->gh_state; |
| 1259 | flags = gh->gh_flags; |
| 1260 | |
| 1261 | error = gfs2_glock_nq(gh); |
| 1262 | if (error) |
| 1263 | return error; |
| 1264 | |
| 1265 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || |
| 1266 | (sdp->sd_vfs->s_flags & MS_RDONLY)) |
| 1267 | return 0; |
| 1268 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1269 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1270 | gfs2_glock_dq(gh); |
Steven Whitehouse | fd88de56 | 2006-05-05 16:59:11 -0400 | [diff] [blame] | 1271 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY, |
| 1272 | gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1273 | error = gfs2_glock_nq(gh); |
| 1274 | if (error) |
| 1275 | return error; |
| 1276 | |
| 1277 | /* Verify that atime hasn't been updated while we were |
| 1278 | trying to get exclusive lock. */ |
| 1279 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1280 | tv = CURRENT_TIME; |
| 1281 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1282 | struct buffer_head *dibh; |
Steven Whitehouse | 48516ce | 2006-10-02 12:39:19 -0400 | [diff] [blame] | 1283 | struct gfs2_dinode *di; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1284 | |
| 1285 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| 1286 | if (error == -EROFS) |
| 1287 | return 0; |
| 1288 | if (error) |
| 1289 | goto fail; |
| 1290 | |
| 1291 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1292 | if (error) |
| 1293 | goto fail_end_trans; |
| 1294 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1295 | ip->i_inode.i_atime = tv; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1296 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1297 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 48516ce | 2006-10-02 12:39:19 -0400 | [diff] [blame] | 1298 | di = (struct gfs2_dinode *)dibh->b_data; |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 1299 | di->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1300 | di->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1301 | brelse(dibh); |
| 1302 | |
| 1303 | gfs2_trans_end(sdp); |
| 1304 | } |
| 1305 | |
| 1306 | /* If someone else has asked for the glock, |
| 1307 | unlock and let them have it. Then reacquire |
| 1308 | in the original state. */ |
| 1309 | if (gfs2_glock_is_blocking(gl)) { |
| 1310 | gfs2_glock_dq(gh); |
| 1311 | gfs2_holder_reinit(state, flags, gh); |
| 1312 | return gfs2_glock_nq(gh); |
| 1313 | } |
| 1314 | } |
| 1315 | |
| 1316 | return 0; |
| 1317 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1318 | fail_end_trans: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1319 | gfs2_trans_end(sdp); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1320 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1321 | gfs2_glock_dq(gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1322 | return error; |
| 1323 | } |
| 1324 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1325 | static int |
| 1326 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) |
| 1327 | { |
| 1328 | struct buffer_head *dibh; |
| 1329 | int error; |
| 1330 | |
| 1331 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1332 | if (!error) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1333 | error = inode_setattr(&ip->i_inode, attr); |
| 1334 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1335 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1336 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1337 | brelse(dibh); |
| 1338 | } |
| 1339 | return error; |
| 1340 | } |
| 1341 | |
| 1342 | /** |
| 1343 | * gfs2_setattr_simple - |
| 1344 | * @ip: |
| 1345 | * @attr: |
| 1346 | * |
| 1347 | * Called with a reference on the vnode. |
| 1348 | * |
| 1349 | * Returns: errno |
| 1350 | */ |
| 1351 | |
| 1352 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) |
| 1353 | { |
| 1354 | int error; |
| 1355 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1356 | if (current->journal_info) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1357 | return __gfs2_setattr_simple(ip, attr); |
| 1358 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1359 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1360 | if (error) |
| 1361 | return error; |
| 1362 | |
| 1363 | error = __gfs2_setattr_simple(ip, attr); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1364 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1365 | return error; |
| 1366 | } |
| 1367 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1368 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
| 1369 | { |
| 1370 | const struct gfs2_dinode_host *di = &ip->i_di; |
| 1371 | struct gfs2_dinode *str = buf; |
| 1372 | |
| 1373 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
| 1374 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); |
| 1375 | str->di_header.__pad0 = 0; |
| 1376 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); |
| 1377 | str->di_header.__pad1 = 0; |
| 1378 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); |
| 1379 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); |
| 1380 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); |
| 1381 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); |
| 1382 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); |
| 1383 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); |
| 1384 | str->di_size = cpu_to_be64(di->di_size); |
| 1385 | str->di_blocks = cpu_to_be64(di->di_blocks); |
| 1386 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
| 1387 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); |
| 1388 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); |
| 1389 | |
| 1390 | str->di_goal_meta = cpu_to_be64(di->di_goal_meta); |
| 1391 | str->di_goal_data = cpu_to_be64(di->di_goal_data); |
| 1392 | str->di_generation = cpu_to_be64(di->di_generation); |
| 1393 | |
| 1394 | str->di_flags = cpu_to_be32(di->di_flags); |
| 1395 | str->di_height = cpu_to_be16(di->di_height); |
| 1396 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
| 1397 | !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ? |
| 1398 | GFS2_FORMAT_DE : 0); |
| 1399 | str->di_depth = cpu_to_be16(di->di_depth); |
| 1400 | str->di_entries = cpu_to_be32(di->di_entries); |
| 1401 | |
| 1402 | str->di_eattr = cpu_to_be64(di->di_eattr); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1403 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
| 1404 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); |
| 1405 | str->di_ctime_nsec = cpu_to_be32(ip->i_inode.i_ctime.tv_nsec); |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1406 | } |
| 1407 | |
| 1408 | void gfs2_dinode_print(const struct gfs2_inode *ip) |
| 1409 | { |
| 1410 | const struct gfs2_dinode_host *di = &ip->i_di; |
| 1411 | |
| 1412 | printk(KERN_INFO " no_formal_ino = %llu\n", |
| 1413 | (unsigned long long)ip->i_no_formal_ino); |
| 1414 | printk(KERN_INFO " no_addr = %llu\n", |
| 1415 | (unsigned long long)ip->i_no_addr); |
| 1416 | printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size); |
| 1417 | printk(KERN_INFO " di_blocks = %llu\n", |
| 1418 | (unsigned long long)di->di_blocks); |
| 1419 | printk(KERN_INFO " di_goal_meta = %llu\n", |
| 1420 | (unsigned long long)di->di_goal_meta); |
| 1421 | printk(KERN_INFO " di_goal_data = %llu\n", |
| 1422 | (unsigned long long)di->di_goal_data); |
| 1423 | printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags); |
| 1424 | printk(KERN_INFO " di_height = %u\n", di->di_height); |
| 1425 | printk(KERN_INFO " di_depth = %u\n", di->di_depth); |
| 1426 | printk(KERN_INFO " di_entries = %u\n", di->di_entries); |
| 1427 | printk(KERN_INFO " di_eattr = %llu\n", |
| 1428 | (unsigned long long)di->di_eattr); |
| 1429 | } |
| 1430 | |