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" |
| 34 | #include "ops_file.h" |
| 35 | #include "ops_inode.h" |
| 36 | #include "quota.h" |
| 37 | #include "rgrp.h" |
| 38 | #include "trans.h" |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 39 | #include "util.h" |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 40 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 41 | struct gfs2_inum_range_host { |
| 42 | u64 ir_start; |
| 43 | u64 ir_length; |
| 44 | }; |
| 45 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 46 | static int iget_test(struct inode *inode, void *opaque) |
| 47 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 48 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 49 | u64 *no_addr = opaque; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 50 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 51 | if (ip->i_no_addr == *no_addr && |
Steven Whitehouse | 1be3867 | 2007-03-01 10:00:53 +0000 | [diff] [blame] | 52 | inode->i_private != NULL) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 53 | return 1; |
| 54 | |
| 55 | return 0; |
| 56 | } |
| 57 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 58 | static int iget_set(struct inode *inode, void *opaque) |
| 59 | { |
| 60 | struct gfs2_inode *ip = GFS2_I(inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 61 | u64 *no_addr = opaque; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 62 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 63 | inode->i_ino = (unsigned long)*no_addr; |
| 64 | ip->i_no_addr = *no_addr; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 65 | return 0; |
| 66 | } |
| 67 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 68 | struct inode *gfs2_ilookup(struct super_block *sb, u64 no_addr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 69 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 70 | unsigned long hash = (unsigned long)no_addr; |
| 71 | return ilookup5(sb, hash, iget_test, &no_addr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 72 | } |
| 73 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 74 | static struct inode *gfs2_iget(struct super_block *sb, u64 no_addr) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 75 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 76 | unsigned long hash = (unsigned long)no_addr; |
| 77 | return iget5_locked(sb, hash, iget_test, iget_set, &no_addr); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 78 | } |
| 79 | |
| 80 | /** |
| 81 | * gfs2_inode_lookup - Lookup an inode |
| 82 | * @sb: The super block |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 83 | * @no_addr: The inode number |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 84 | * @type: The type of the inode |
| 85 | * |
| 86 | * Returns: A VFS inode, or an error |
| 87 | */ |
| 88 | |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame^] | 89 | struct inode *gfs2_inode_lookup(struct super_block *sb, |
| 90 | unsigned int type, |
| 91 | u64 no_addr, |
| 92 | u64 no_formal_ino) |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 93 | { |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 94 | struct inode *inode = gfs2_iget(sb, no_addr); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 95 | struct gfs2_inode *ip = GFS2_I(inode); |
| 96 | struct gfs2_glock *io_gl; |
| 97 | int error; |
| 98 | |
Steven Whitehouse | 26d83de | 2006-10-30 16:59:08 -0500 | [diff] [blame] | 99 | if (!inode) |
| 100 | return ERR_PTR(-ENOBUFS); |
| 101 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 102 | if (inode->i_state & I_NEW) { |
| 103 | struct gfs2_sbd *sdp = GFS2_SB(inode); |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 104 | umode_t mode; |
Theodore Ts'o | bba9dfd | 2006-09-27 01:50:31 -0700 | [diff] [blame] | 105 | inode->i_private = ip; |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame^] | 106 | ip->i_no_formal_ino = no_formal_ino; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 107 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 108 | 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] | 109 | if (unlikely(error)) |
| 110 | goto fail; |
| 111 | ip->i_gl->gl_object = ip; |
| 112 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 113 | 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] | 114 | if (unlikely(error)) |
| 115 | goto fail_put; |
| 116 | |
Steven Whitehouse | bfded27 | 2006-11-01 16:05:38 -0500 | [diff] [blame] | 117 | set_bit(GIF_INVALID, &ip->i_flags); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 118 | error = gfs2_glock_nq_init(io_gl, LM_ST_SHARED, GL_EXACT, &ip->i_iopen_gh); |
| 119 | if (unlikely(error)) |
| 120 | goto fail_iopen; |
Abhijith Das | d93cfa9 | 2007-06-11 08:22:32 +0100 | [diff] [blame] | 121 | ip->i_iopen_gh.gh_gl->gl_object = ip; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 122 | |
| 123 | gfs2_glock_put(io_gl); |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 124 | |
| 125 | /* |
| 126 | * We must read the inode in order to work out its type in |
| 127 | * this case. Note that this doesn't happen often as we normally |
| 128 | * know the type beforehand. This code path only occurs during |
| 129 | * unlinked inode recovery (where it is safe to do this glock, |
| 130 | * which is not true in the general case). |
| 131 | */ |
| 132 | inode->i_mode = mode = DT2IF(type); |
| 133 | if (type == DT_UNKNOWN) { |
| 134 | struct gfs2_holder gh; |
| 135 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 136 | if (unlikely(error)) |
| 137 | goto fail_glock; |
| 138 | /* Inode is now uptodate */ |
| 139 | mode = inode->i_mode; |
| 140 | gfs2_glock_dq_uninit(&gh); |
| 141 | } |
| 142 | |
| 143 | if (S_ISREG(mode)) { |
| 144 | inode->i_op = &gfs2_file_iops; |
| 145 | inode->i_fop = &gfs2_file_fops; |
| 146 | inode->i_mapping->a_ops = &gfs2_file_aops; |
| 147 | } else if (S_ISDIR(mode)) { |
| 148 | inode->i_op = &gfs2_dir_iops; |
| 149 | inode->i_fop = &gfs2_dir_fops; |
| 150 | } else if (S_ISLNK(mode)) { |
| 151 | inode->i_op = &gfs2_symlink_iops; |
| 152 | } else { |
| 153 | inode->i_op = &gfs2_dev_iops; |
| 154 | } |
| 155 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 156 | unlock_new_inode(inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 157 | } |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 158 | |
| 159 | return inode; |
Steven Whitehouse | c8cdf47 | 2007-06-08 10:05:33 +0100 | [diff] [blame] | 160 | fail_glock: |
| 161 | gfs2_glock_dq(&ip->i_iopen_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 162 | fail_iopen: |
| 163 | gfs2_glock_put(io_gl); |
| 164 | fail_put: |
| 165 | ip->i_gl->gl_object = NULL; |
| 166 | gfs2_glock_put(ip->i_gl); |
| 167 | fail: |
| 168 | iput(inode); |
| 169 | return ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 170 | } |
| 171 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 172 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 173 | { |
| 174 | struct gfs2_dinode_host *di = &ip->i_di; |
| 175 | const struct gfs2_dinode *str = buf; |
| 176 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 177 | 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] | 178 | if (gfs2_consist_inode(ip)) |
| 179 | gfs2_dinode_print(ip); |
| 180 | return -EIO; |
| 181 | } |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 182 | 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] | 183 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 184 | ip->i_inode.i_rdev = 0; |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 185 | switch (ip->i_inode.i_mode & S_IFMT) { |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 186 | case S_IFBLK: |
| 187 | case S_IFCHR: |
| 188 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), |
| 189 | be32_to_cpu(str->di_minor)); |
| 190 | break; |
| 191 | }; |
| 192 | |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 193 | ip->i_inode.i_uid = be32_to_cpu(str->di_uid); |
| 194 | ip->i_inode.i_gid = be32_to_cpu(str->di_gid); |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 195 | /* |
| 196 | * We will need to review setting the nlink count here in the |
| 197 | * light of the forthcoming ro bind mount work. This is a reminder |
| 198 | * to do that. |
| 199 | */ |
| 200 | ip->i_inode.i_nlink = be32_to_cpu(str->di_nlink); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 201 | di->di_size = be64_to_cpu(str->di_size); |
Steven Whitehouse | 9e2dbda | 2006-11-08 15:45:46 -0500 | [diff] [blame] | 202 | i_size_write(&ip->i_inode, di->di_size); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 203 | di->di_blocks = be64_to_cpu(str->di_blocks); |
Steven Whitehouse | 9e2dbda | 2006-11-08 15:45:46 -0500 | [diff] [blame] | 204 | gfs2_set_inode_blocks(&ip->i_inode); |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 205 | 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] | 206 | 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] | 207 | 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] | 208 | 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] | 209 | 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] | 210 | 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] | 211 | |
| 212 | di->di_goal_meta = be64_to_cpu(str->di_goal_meta); |
| 213 | di->di_goal_data = be64_to_cpu(str->di_goal_data); |
| 214 | di->di_generation = be64_to_cpu(str->di_generation); |
| 215 | |
| 216 | di->di_flags = be32_to_cpu(str->di_flags); |
Steven Whitehouse | 6b124d8 | 2006-11-08 12:51:06 -0500 | [diff] [blame] | 217 | gfs2_set_inode_flags(&ip->i_inode); |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 218 | di->di_height = be16_to_cpu(str->di_height); |
| 219 | |
| 220 | di->di_depth = be16_to_cpu(str->di_depth); |
| 221 | di->di_entries = be32_to_cpu(str->di_entries); |
| 222 | |
| 223 | di->di_eattr = be64_to_cpu(str->di_eattr); |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 224 | return 0; |
Steven Whitehouse | ea744d0 | 2006-10-31 15:28:00 -0500 | [diff] [blame] | 225 | } |
| 226 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 227 | /** |
| 228 | * gfs2_inode_refresh - Refresh the incore copy of the dinode |
| 229 | * @ip: The GFS2 inode |
| 230 | * |
| 231 | * Returns: errno |
| 232 | */ |
| 233 | |
| 234 | int gfs2_inode_refresh(struct gfs2_inode *ip) |
| 235 | { |
| 236 | struct buffer_head *dibh; |
| 237 | int error; |
| 238 | |
| 239 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 240 | if (error) |
| 241 | return error; |
| 242 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 243 | 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] | 244 | brelse(dibh); |
| 245 | return -EIO; |
| 246 | } |
| 247 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 248 | error = gfs2_dinode_in(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 249 | brelse(dibh); |
Steven Whitehouse | bfded27 | 2006-11-01 16:05:38 -0500 | [diff] [blame] | 250 | clear_bit(GIF_INVALID, &ip->i_flags); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 251 | |
Steven Whitehouse | af339c0 | 2006-11-01 10:34:15 -0500 | [diff] [blame] | 252 | return error; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 253 | } |
| 254 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 255 | int gfs2_dinode_dealloc(struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 256 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 257 | struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 258 | struct gfs2_alloc *al; |
| 259 | struct gfs2_rgrpd *rgd; |
| 260 | int error; |
| 261 | |
| 262 | if (ip->i_di.di_blocks != 1) { |
| 263 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 264 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 265 | return -EIO; |
| 266 | } |
| 267 | |
| 268 | al = gfs2_alloc_get(ip); |
| 269 | |
| 270 | error = gfs2_quota_hold(ip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 271 | if (error) |
| 272 | goto out; |
| 273 | |
| 274 | error = gfs2_rindex_hold(sdp, &al->al_ri_gh); |
| 275 | if (error) |
| 276 | goto out_qs; |
| 277 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 278 | rgd = gfs2_blk2rgrpd(sdp, ip->i_no_addr); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 279 | if (!rgd) { |
| 280 | gfs2_consist_inode(ip); |
| 281 | error = -EIO; |
| 282 | goto out_rindex_relse; |
| 283 | } |
| 284 | |
| 285 | error = gfs2_glock_nq_init(rgd->rd_gl, LM_ST_EXCLUSIVE, 0, |
| 286 | &al->al_rgd_gh); |
| 287 | if (error) |
| 288 | goto out_rindex_relse; |
| 289 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 290 | 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] | 291 | if (error) |
| 292 | goto out_rg_gunlock; |
| 293 | |
| 294 | gfs2_trans_add_gl(ip->i_gl); |
| 295 | |
| 296 | gfs2_free_di(rgd, ip); |
| 297 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 298 | gfs2_trans_end(sdp); |
| 299 | clear_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
| 300 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 301 | out_rg_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 302 | gfs2_glock_dq_uninit(&al->al_rgd_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 303 | out_rindex_relse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 304 | gfs2_glock_dq_uninit(&al->al_ri_gh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 305 | out_qs: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 306 | gfs2_quota_unhold(ip); |
Steven Whitehouse | 3632752 | 2006-04-28 10:46:21 -0400 | [diff] [blame] | 307 | out: |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 308 | gfs2_alloc_put(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 309 | return error; |
| 310 | } |
| 311 | |
| 312 | /** |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 313 | * gfs2_change_nlink - Change nlink count on inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 314 | * @ip: The GFS2 inode |
| 315 | * @diff: The change in the nlink count required |
| 316 | * |
| 317 | * Returns: errno |
| 318 | */ |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 319 | int gfs2_change_nlink(struct gfs2_inode *ip, int diff) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 320 | { |
| 321 | struct buffer_head *dibh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 322 | u32 nlink; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 323 | int error; |
| 324 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 325 | BUG_ON(diff != 1 && diff != -1); |
| 326 | nlink = ip->i_inode.i_nlink + diff; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 327 | |
| 328 | /* If we are reducing the nlink count, but the new value ends up being |
| 329 | bigger than the old one, we must have underflowed. */ |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 330 | if (diff < 0 && nlink > ip->i_inode.i_nlink) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 331 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 332 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 333 | return -EIO; |
| 334 | } |
| 335 | |
| 336 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 337 | if (error) |
| 338 | return error; |
| 339 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 340 | if (diff > 0) |
| 341 | inc_nlink(&ip->i_inode); |
| 342 | else |
| 343 | drop_nlink(&ip->i_inode); |
| 344 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 345 | ip->i_inode.i_ctime = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 346 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 347 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 348 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 349 | brelse(dibh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 350 | mark_inode_dirty(&ip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 351 | |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 352 | if (ip->i_inode.i_nlink == 0) |
Russell Cattelan | ddee760 | 2007-01-29 17:13:44 -0600 | [diff] [blame] | 353 | gfs2_unlink_di(&ip->i_inode); /* mark inode unlinked */ |
S. Wendy Cheng | 87d21e0 | 2007-01-18 16:07:03 -0500 | [diff] [blame] | 354 | |
S. Wendy Cheng | 5509826 | 2007-01-18 15:56:34 -0500 | [diff] [blame] | 355 | return error; |
| 356 | } |
| 357 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 358 | struct inode *gfs2_lookup_simple(struct inode *dip, const char *name) |
| 359 | { |
| 360 | struct qstr qstr; |
Russell Cattelan | 6c93fd1 | 2007-01-08 17:47:51 -0600 | [diff] [blame] | 361 | struct inode *inode; |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 362 | gfs2_str2qstr(&qstr, name); |
Russell Cattelan | 6c93fd1 | 2007-01-08 17:47:51 -0600 | [diff] [blame] | 363 | inode = gfs2_lookupi(dip, &qstr, 1, NULL); |
| 364 | /* gfs2_lookupi has inconsistent callers: vfs |
| 365 | * related routines expect NULL for no entry found, |
| 366 | * gfs2_lookup_simple callers expect ENOENT |
| 367 | * and do not check for NULL. |
| 368 | */ |
| 369 | if (inode == NULL) |
| 370 | return ERR_PTR(-ENOENT); |
| 371 | else |
| 372 | return inode; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 373 | } |
| 374 | |
| 375 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 376 | /** |
| 377 | * gfs2_lookupi - Look up a filename in a directory and return its inode |
| 378 | * @d_gh: An initialized holder for the directory glock |
| 379 | * @name: The name of the inode to look for |
| 380 | * @is_root: If 1, ignore the caller's permissions |
| 381 | * @i_gh: An uninitialized holder for the new inode glock |
| 382 | * |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 383 | * This can be called via the VFS filldir function when NFS is doing |
| 384 | * a readdirplus and the inode which its intending to stat isn't |
| 385 | * already in cache. In this case we must not take the directory glock |
| 386 | * again, since the readdir call will have already taken that lock. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 387 | * |
| 388 | * Returns: errno |
| 389 | */ |
| 390 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 391 | struct inode *gfs2_lookupi(struct inode *dir, const struct qstr *name, |
| 392 | int is_root, struct nameidata *nd) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 393 | { |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 394 | struct super_block *sb = dir->i_sb; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 395 | struct gfs2_inode *dip = GFS2_I(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 396 | struct gfs2_holder d_gh; |
akpm@linux-foundation.org | 037bcbb | 2007-06-08 16:42:14 -0700 | [diff] [blame] | 397 | int error = 0; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 398 | struct inode *inode = NULL; |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 399 | int unlock = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 400 | |
| 401 | if (!name->len || name->len > GFS2_FNAMESIZE) |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 402 | return ERR_PTR(-ENAMETOOLONG); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 403 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 404 | if ((name->len == 1 && memcmp(name->name, ".", 1) == 0) || |
| 405 | (name->len == 2 && memcmp(name->name, "..", 2) == 0 && |
| 406 | dir == sb->s_root->d_inode)) { |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 407 | igrab(dir); |
| 408 | return dir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 409 | } |
| 410 | |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 411 | if (gfs2_glock_is_locked_by_me(dip->i_gl) == 0) { |
| 412 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, &d_gh); |
| 413 | if (error) |
| 414 | return ERR_PTR(error); |
| 415 | unlock = 1; |
| 416 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 417 | |
| 418 | if (!is_root) { |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 419 | error = permission(dir, MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 420 | if (error) |
| 421 | goto out; |
| 422 | } |
| 423 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 424 | inode = gfs2_dir_search(dir, name); |
| 425 | if (IS_ERR(inode)) |
| 426 | error = PTR_ERR(inode); |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 427 | out: |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 428 | if (unlock) |
| 429 | gfs2_glock_dq_uninit(&d_gh); |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 430 | if (error == -ENOENT) |
| 431 | return NULL; |
Steven Whitehouse | d7c103d | 2007-01-25 17:14:59 +0000 | [diff] [blame] | 432 | return inode ? inode : ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 433 | } |
| 434 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 435 | static void gfs2_inum_range_in(struct gfs2_inum_range_host *ir, const void *buf) |
| 436 | { |
| 437 | const struct gfs2_inum_range *str = buf; |
| 438 | |
| 439 | ir->ir_start = be64_to_cpu(str->ir_start); |
| 440 | ir->ir_length = be64_to_cpu(str->ir_length); |
| 441 | } |
| 442 | |
| 443 | static void gfs2_inum_range_out(const struct gfs2_inum_range_host *ir, void *buf) |
| 444 | { |
| 445 | struct gfs2_inum_range *str = buf; |
| 446 | |
| 447 | str->ir_start = cpu_to_be64(ir->ir_start); |
| 448 | str->ir_length = cpu_to_be64(ir->ir_length); |
| 449 | } |
| 450 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 451 | 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] | 452 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 453 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 454 | struct buffer_head *bh; |
Al Viro | e697264 | 2006-10-13 21:29:46 -0400 | [diff] [blame] | 455 | struct gfs2_inum_range_host ir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 456 | int error; |
| 457 | |
| 458 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| 459 | if (error) |
| 460 | return error; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 461 | mutex_lock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 462 | |
| 463 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 464 | if (error) { |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 465 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 466 | gfs2_trans_end(sdp); |
| 467 | return error; |
| 468 | } |
| 469 | |
| 470 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 471 | |
| 472 | if (ir.ir_length) { |
| 473 | *formal_ino = ir.ir_start++; |
| 474 | ir.ir_length--; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 475 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 476 | gfs2_inum_range_out(&ir, |
| 477 | bh->b_data + sizeof(struct gfs2_dinode)); |
| 478 | brelse(bh); |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 479 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 480 | gfs2_trans_end(sdp); |
| 481 | return 0; |
| 482 | } |
| 483 | |
| 484 | brelse(bh); |
| 485 | |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 486 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 487 | gfs2_trans_end(sdp); |
| 488 | |
| 489 | return 1; |
| 490 | } |
| 491 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 492 | 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] | 493 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 494 | struct gfs2_inode *ip = GFS2_I(sdp->sd_ir_inode); |
| 495 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_inum_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 496 | struct gfs2_holder gh; |
| 497 | struct buffer_head *bh; |
Al Viro | e697264 | 2006-10-13 21:29:46 -0400 | [diff] [blame] | 498 | struct gfs2_inum_range_host ir; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 499 | int error; |
| 500 | |
| 501 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh); |
| 502 | if (error) |
| 503 | return error; |
| 504 | |
| 505 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); |
| 506 | if (error) |
| 507 | goto out; |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 508 | mutex_lock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 509 | |
| 510 | error = gfs2_meta_inode_buffer(ip, &bh); |
| 511 | if (error) |
| 512 | goto out_end_trans; |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 513 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 514 | gfs2_inum_range_in(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 515 | |
| 516 | if (!ir.ir_length) { |
| 517 | struct buffer_head *m_bh; |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 518 | u64 x, y; |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 519 | __be64 z; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 520 | |
| 521 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); |
| 522 | if (error) |
| 523 | goto out_brelse; |
| 524 | |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 525 | z = *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)); |
| 526 | x = y = be64_to_cpu(z); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 527 | ir.ir_start = x; |
| 528 | ir.ir_length = GFS2_INUM_QUANTUM; |
| 529 | x += GFS2_INUM_QUANTUM; |
| 530 | if (x < y) |
| 531 | gfs2_consist_inode(m_ip); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 532 | z = cpu_to_be64(x); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 533 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
Al Viro | b44b84d | 2006-10-14 10:46:30 -0400 | [diff] [blame] | 534 | *(__be64 *)(m_bh->b_data + sizeof(struct gfs2_dinode)) = z; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 535 | |
| 536 | brelse(m_bh); |
| 537 | } |
| 538 | |
| 539 | *formal_ino = ir.ir_start++; |
| 540 | ir.ir_length--; |
| 541 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 542 | gfs2_trans_add_bh(ip->i_gl, bh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 543 | gfs2_inum_range_out(&ir, bh->b_data + sizeof(struct gfs2_dinode)); |
| 544 | |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 545 | out_brelse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 546 | brelse(bh); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 547 | out_end_trans: |
Steven Whitehouse | f55ab26 | 2006-02-21 12:51:39 +0000 | [diff] [blame] | 548 | mutex_unlock(&sdp->sd_inum_mutex); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 549 | gfs2_trans_end(sdp); |
Steven Whitehouse | 420b9e5 | 2006-07-31 15:42:17 -0400 | [diff] [blame] | 550 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 551 | gfs2_glock_dq_uninit(&gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 552 | return error; |
| 553 | } |
| 554 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 555 | static int pick_formal_ino(struct gfs2_sbd *sdp, u64 *inum) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 556 | { |
| 557 | int error; |
| 558 | |
| 559 | error = pick_formal_ino_1(sdp, inum); |
| 560 | if (error <= 0) |
| 561 | return error; |
| 562 | |
| 563 | error = pick_formal_ino_2(sdp, inum); |
| 564 | |
| 565 | return error; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * create_ok - OK to create a new on-disk inode here? |
| 570 | * @dip: Directory in which dinode is to be created |
| 571 | * @name: Name of new dinode |
| 572 | * @mode: |
| 573 | * |
| 574 | * Returns: errno |
| 575 | */ |
| 576 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 577 | static int create_ok(struct gfs2_inode *dip, const struct qstr *name, |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 578 | unsigned int mode) |
| 579 | { |
| 580 | int error; |
| 581 | |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 582 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 583 | if (error) |
| 584 | return error; |
| 585 | |
| 586 | /* Don't create entries in an unlinked directory */ |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 587 | if (!dip->i_inode.i_nlink) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 588 | return -EPERM; |
| 589 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 590 | error = gfs2_dir_check(&dip->i_inode, name, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 591 | switch (error) { |
| 592 | case -ENOENT: |
| 593 | error = 0; |
| 594 | break; |
| 595 | case 0: |
| 596 | return -EEXIST; |
| 597 | default: |
| 598 | return error; |
| 599 | } |
| 600 | |
Steven Whitehouse | cd91549 | 2006-09-04 12:49:07 -0400 | [diff] [blame] | 601 | if (dip->i_di.di_entries == (u32)-1) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 602 | return -EFBIG; |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 603 | if (S_ISDIR(mode) && dip->i_inode.i_nlink == (u32)-1) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 604 | return -EMLINK; |
| 605 | |
| 606 | return 0; |
| 607 | } |
| 608 | |
| 609 | static void munge_mode_uid_gid(struct gfs2_inode *dip, unsigned int *mode, |
| 610 | unsigned int *uid, unsigned int *gid) |
| 611 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 612 | if (GFS2_SB(&dip->i_inode)->sd_args.ar_suiddir && |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 613 | (dip->i_inode.i_mode & S_ISUID) && dip->i_inode.i_uid) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 614 | if (S_ISDIR(*mode)) |
| 615 | *mode |= S_ISUID; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 616 | else if (dip->i_inode.i_uid != current->fsuid) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 617 | *mode &= ~07111; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 618 | *uid = dip->i_inode.i_uid; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 619 | } else |
| 620 | *uid = current->fsuid; |
| 621 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 622 | if (dip->i_inode.i_mode & S_ISGID) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 623 | if (S_ISDIR(*mode)) |
| 624 | *mode |= S_ISGID; |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 625 | *gid = dip->i_inode.i_gid; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 626 | } else |
| 627 | *gid = current->fsgid; |
| 628 | } |
| 629 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 630 | 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] | 631 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 632 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 633 | int error; |
| 634 | |
| 635 | gfs2_alloc_get(dip); |
| 636 | |
| 637 | dip->i_alloc.al_requested = RES_DINODE; |
| 638 | error = gfs2_inplace_reserve(dip); |
| 639 | if (error) |
| 640 | goto out; |
| 641 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 642 | error = gfs2_trans_begin(sdp, RES_RG_BIT + RES_STATFS, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 643 | if (error) |
| 644 | goto out_ipreserv; |
| 645 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 646 | *no_addr = gfs2_alloc_di(dip, generation); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 647 | |
| 648 | gfs2_trans_end(sdp); |
| 649 | |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 650 | out_ipreserv: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 651 | gfs2_inplace_release(dip); |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 652 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 653 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 654 | return error; |
| 655 | } |
| 656 | |
| 657 | /** |
| 658 | * init_dinode - Fill in a new dinode structure |
| 659 | * @dip: the directory this inode is being created in |
| 660 | * @gl: The glock covering the new inode |
| 661 | * @inum: the inode number |
| 662 | * @mode: the file permissions |
| 663 | * @uid: |
| 664 | * @gid: |
| 665 | * |
| 666 | */ |
| 667 | |
| 668 | static void init_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, |
Al Viro | 629a21e | 2006-10-13 22:51:24 -0400 | [diff] [blame] | 669 | const struct gfs2_inum_host *inum, unsigned int mode, |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 670 | unsigned int uid, unsigned int gid, |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 671 | const u64 *generation, dev_t dev) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 672 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 673 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 674 | struct gfs2_dinode *di; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 675 | struct buffer_head *dibh; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 676 | struct timespec tv = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 677 | |
| 678 | dibh = gfs2_meta_new(gl, inum->no_addr); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 679 | gfs2_trans_add_bh(gl, dibh, 1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 680 | gfs2_metatype_set(dibh, GFS2_METATYPE_DI, GFS2_FORMAT_DI); |
| 681 | gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode)); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 682 | di = (struct gfs2_dinode *)dibh->b_data; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 683 | |
Steven Whitehouse | 2442a09 | 2006-01-30 11:49:32 +0000 | [diff] [blame] | 684 | di->di_num.no_formal_ino = cpu_to_be64(inum->no_formal_ino); |
| 685 | di->di_num.no_addr = cpu_to_be64(inum->no_addr); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 686 | di->di_mode = cpu_to_be32(mode); |
| 687 | di->di_uid = cpu_to_be32(uid); |
| 688 | di->di_gid = cpu_to_be32(gid); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 689 | di->di_nlink = 0; |
| 690 | di->di_size = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 691 | di->di_blocks = cpu_to_be64(1); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 692 | 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] | 693 | di->di_major = cpu_to_be32(MAJOR(dev)); |
| 694 | di->di_minor = cpu_to_be32(MINOR(dev)); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 695 | 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] | 696 | di->di_generation = cpu_to_be64(*generation); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 697 | di->di_flags = 0; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 698 | |
| 699 | if (S_ISREG(mode)) { |
| 700 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_JDATA) || |
| 701 | gfs2_tune_get(sdp, gt_new_files_jdata)) |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 702 | di->di_flags |= cpu_to_be32(GFS2_DIF_JDATA); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 703 | if ((dip->i_di.di_flags & GFS2_DIF_INHERIT_DIRECTIO) || |
| 704 | gfs2_tune_get(sdp, gt_new_files_directio)) |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 705 | di->di_flags |= cpu_to_be32(GFS2_DIF_DIRECTIO); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 706 | } else if (S_ISDIR(mode)) { |
Steven Whitehouse | 568f4c9 | 2006-02-27 12:00:42 -0500 | [diff] [blame] | 707 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
| 708 | GFS2_DIF_INHERIT_DIRECTIO); |
| 709 | di->di_flags |= cpu_to_be32(dip->i_di.di_flags & |
| 710 | GFS2_DIF_INHERIT_JDATA); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 711 | } |
| 712 | |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 713 | di->__pad1 = 0; |
Steven Whitehouse | a9583c7 | 2006-11-01 20:09:14 -0500 | [diff] [blame] | 714 | 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] | 715 | di->di_height = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 716 | di->__pad2 = 0; |
| 717 | di->__pad3 = 0; |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 718 | di->di_depth = 0; |
| 719 | di->di_entries = 0; |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 720 | memset(&di->__pad4, 0, sizeof(di->__pad4)); |
Steven Whitehouse | 294caaa | 2006-11-02 11:59:28 -0500 | [diff] [blame] | 721 | di->di_eattr = 0; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 722 | di->di_atime_nsec = cpu_to_be32(tv.tv_nsec); |
| 723 | di->di_mtime_nsec = cpu_to_be32(tv.tv_nsec); |
| 724 | di->di_ctime_nsec = cpu_to_be32(tv.tv_nsec); |
Steven Whitehouse | b96ca4f | 2006-01-18 10:57:10 +0000 | [diff] [blame] | 725 | memset(&di->di_reserved, 0, sizeof(di->di_reserved)); |
| 726 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 727 | brelse(dibh); |
| 728 | } |
| 729 | |
| 730 | static int make_dinode(struct gfs2_inode *dip, struct gfs2_glock *gl, |
Al Viro | 629a21e | 2006-10-13 22:51:24 -0400 | [diff] [blame] | 731 | unsigned int mode, const struct gfs2_inum_host *inum, |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 732 | const u64 *generation, dev_t dev) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 733 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 734 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 735 | unsigned int uid, gid; |
| 736 | int error; |
| 737 | |
| 738 | munge_mode_uid_gid(dip, &mode, &uid, &gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 739 | gfs2_alloc_get(dip); |
| 740 | |
| 741 | error = gfs2_quota_lock(dip, uid, gid); |
| 742 | if (error) |
| 743 | goto out; |
| 744 | |
| 745 | error = gfs2_quota_check(dip, uid, gid); |
| 746 | if (error) |
| 747 | goto out_quota; |
| 748 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 749 | error = gfs2_trans_begin(sdp, RES_DINODE + RES_QUOTA, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 750 | if (error) |
| 751 | goto out_quota; |
| 752 | |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 753 | init_dinode(dip, gl, inum, mode, uid, gid, generation, dev); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 754 | gfs2_quota_change(dip, +1, uid, gid); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 755 | gfs2_trans_end(sdp); |
| 756 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 757 | out_quota: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 758 | gfs2_quota_unlock(dip); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 759 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 760 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 761 | return error; |
| 762 | } |
| 763 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 764 | static int link_dinode(struct gfs2_inode *dip, const struct qstr *name, |
| 765 | struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 766 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 767 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 768 | struct gfs2_alloc *al; |
| 769 | int alloc_required; |
| 770 | struct buffer_head *dibh; |
| 771 | int error; |
| 772 | |
| 773 | al = gfs2_alloc_get(dip); |
| 774 | |
| 775 | error = gfs2_quota_lock(dip, NO_QUOTA_CHANGE, NO_QUOTA_CHANGE); |
| 776 | if (error) |
| 777 | goto fail; |
| 778 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 779 | error = alloc_required = gfs2_diradd_alloc_required(&dip->i_inode, name); |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 780 | if (alloc_required < 0) |
| 781 | goto fail; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 782 | if (alloc_required) { |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 783 | 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] | 784 | if (error) |
| 785 | goto fail_quota_locks; |
| 786 | |
| 787 | al->al_requested = sdp->sd_max_dirres; |
| 788 | |
| 789 | error = gfs2_inplace_reserve(dip); |
| 790 | if (error) |
| 791 | goto fail_quota_locks; |
| 792 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 793 | error = gfs2_trans_begin(sdp, sdp->sd_max_dirres + |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 794 | al->al_rgd->rd_length + |
Steven Whitehouse | 907b9bc | 2006-09-25 09:26:04 -0400 | [diff] [blame] | 795 | 2 * RES_DINODE + |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 796 | RES_STATFS + RES_QUOTA, 0); |
| 797 | if (error) |
| 798 | goto fail_ipreserv; |
| 799 | } else { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 800 | error = gfs2_trans_begin(sdp, RES_LEAF + 2 * RES_DINODE, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 801 | if (error) |
| 802 | goto fail_quota_locks; |
| 803 | } |
| 804 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 805 | 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] | 806 | if (error) |
| 807 | goto fail_end_trans; |
| 808 | |
| 809 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 810 | if (error) |
| 811 | goto fail_end_trans; |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 812 | ip->i_inode.i_nlink = 1; |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 813 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 814 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 815 | brelse(dibh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 816 | return 0; |
| 817 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 818 | fail_end_trans: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 819 | gfs2_trans_end(sdp); |
| 820 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 821 | fail_ipreserv: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 822 | if (dip->i_alloc.al_rgd) |
| 823 | gfs2_inplace_release(dip); |
| 824 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 825 | fail_quota_locks: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 826 | gfs2_quota_unlock(dip); |
| 827 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 828 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 829 | gfs2_alloc_put(dip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 830 | return error; |
| 831 | } |
| 832 | |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 833 | static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) |
| 834 | { |
| 835 | int err; |
| 836 | size_t len; |
| 837 | void *value; |
| 838 | char *name; |
| 839 | struct gfs2_ea_request er; |
| 840 | |
| 841 | err = security_inode_init_security(&ip->i_inode, &dip->i_inode, |
| 842 | &name, &value, &len); |
| 843 | |
| 844 | if (err) { |
| 845 | if (err == -EOPNOTSUPP) |
| 846 | return 0; |
| 847 | return err; |
| 848 | } |
| 849 | |
| 850 | memset(&er, 0, sizeof(struct gfs2_ea_request)); |
| 851 | |
| 852 | er.er_type = GFS2_EATYPE_SECURITY; |
| 853 | er.er_name = name; |
| 854 | er.er_data = value; |
| 855 | er.er_name_len = strlen(name); |
| 856 | er.er_data_len = len; |
| 857 | |
| 858 | err = gfs2_ea_set_i(ip, &er); |
| 859 | |
| 860 | kfree(value); |
| 861 | kfree(name); |
| 862 | |
| 863 | return err; |
| 864 | } |
| 865 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 866 | /** |
| 867 | * gfs2_createi - Create a new inode |
| 868 | * @ghs: An array of two holders |
| 869 | * @name: The name of the new file |
| 870 | * @mode: the permissions on the new inode |
| 871 | * |
| 872 | * @ghs[0] is an initialized holder for the directory |
| 873 | * @ghs[1] is the holder for the inode lock |
| 874 | * |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 875 | * 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] | 876 | * file are held. A transaction has been started and an inplace reservation |
| 877 | * is held, as well. |
| 878 | * |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 879 | * Returns: An inode |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 880 | */ |
| 881 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 882 | struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 883 | unsigned int mode, dev_t dev) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 884 | { |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 885 | struct inode *inode = NULL; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 886 | struct gfs2_inode *dip = ghs->gh_gl->gl_object; |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 887 | struct inode *dir = &dip->i_inode; |
| 888 | struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode); |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 889 | struct gfs2_inum_host inum = { .no_addr = 0, .no_formal_ino = 0 }; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 890 | int error; |
Steven Whitehouse | 4340fe6 | 2006-07-11 09:46:33 -0400 | [diff] [blame] | 891 | u64 generation; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 892 | |
| 893 | if (!name->len || name->len > GFS2_FNAMESIZE) |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 894 | return ERR_PTR(-ENAMETOOLONG); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 895 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 896 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, 0, ghs); |
| 897 | error = gfs2_glock_nq(ghs); |
| 898 | if (error) |
| 899 | goto fail; |
| 900 | |
| 901 | error = create_ok(dip, name, mode); |
| 902 | if (error) |
| 903 | goto fail_gunlock; |
| 904 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 905 | error = pick_formal_ino(sdp, &inum.no_formal_ino); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 906 | if (error) |
| 907 | goto fail_gunlock; |
| 908 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 909 | error = alloc_dinode(dip, &inum.no_addr, &generation); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 910 | if (error) |
| 911 | goto fail_gunlock; |
| 912 | |
Steven Whitehouse | 28626e2 | 2006-11-22 11:13:21 -0500 | [diff] [blame] | 913 | error = gfs2_glock_nq_num(sdp, inum.no_addr, &gfs2_inode_glops, |
| 914 | LM_ST_EXCLUSIVE, GL_SKIP, ghs + 1); |
| 915 | if (error) |
| 916 | goto fail_gunlock; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 917 | |
Steven Whitehouse | e7f14f4 | 2006-10-31 21:45:08 -0500 | [diff] [blame] | 918 | error = make_dinode(dip, ghs[1].gh_gl, mode, &inum, &generation, dev); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 919 | if (error) |
| 920 | goto fail_gunlock2; |
| 921 | |
Wendy Cheng | bb9bcf0 | 2007-06-27 17:07:08 -0400 | [diff] [blame^] | 922 | inode = gfs2_inode_lookup(dir->i_sb, IF2DT(mode), |
| 923 | inum.no_addr, |
| 924 | inum.no_formal_ino); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 925 | if (IS_ERR(inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 926 | goto fail_gunlock2; |
| 927 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 928 | error = gfs2_inode_refresh(GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 929 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 930 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 931 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 932 | error = gfs2_acl_create(dip, GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 933 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 934 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 935 | |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 936 | error = gfs2_security_init(dip, GFS2_I(inode)); |
| 937 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 938 | goto fail_gunlock2; |
Ryan O'Hara | fcb47e0b | 2006-10-03 11:57:35 -0400 | [diff] [blame] | 939 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 940 | error = link_dinode(dip, name, GFS2_I(inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 941 | if (error) |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 942 | goto fail_gunlock2; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 943 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 944 | if (!inode) |
| 945 | return ERR_PTR(-ENOMEM); |
| 946 | return inode; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 947 | |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 948 | fail_gunlock2: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 949 | gfs2_glock_dq_uninit(ghs + 1); |
Steven Whitehouse | e1cc860 | 2007-06-07 11:47:52 +0100 | [diff] [blame] | 950 | if (inode) |
| 951 | iput(inode); |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 952 | fail_gunlock: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 953 | gfs2_glock_dq(ghs); |
Steven Whitehouse | 320dd10 | 2006-05-18 16:25:27 -0400 | [diff] [blame] | 954 | fail: |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 955 | return ERR_PTR(error); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 956 | } |
| 957 | |
| 958 | /** |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 959 | * gfs2_rmdiri - Remove a directory |
| 960 | * @dip: The parent directory of the directory to be removed |
| 961 | * @name: The name of the directory to be removed |
| 962 | * @ip: The GFS2 inode of the directory to be removed |
| 963 | * |
| 964 | * Assumes Glocks on dip and ip are held |
| 965 | * |
| 966 | * Returns: errno |
| 967 | */ |
| 968 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 969 | int gfs2_rmdiri(struct gfs2_inode *dip, const struct qstr *name, |
| 970 | struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 971 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 972 | struct qstr dotname; |
| 973 | int error; |
| 974 | |
| 975 | if (ip->i_di.di_entries != 2) { |
| 976 | if (gfs2_consist_inode(ip)) |
Steven Whitehouse | 4cc14f0 | 2006-10-31 19:00:24 -0500 | [diff] [blame] | 977 | gfs2_dinode_print(ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 978 | return -EIO; |
| 979 | } |
| 980 | |
| 981 | error = gfs2_dir_del(dip, name); |
| 982 | if (error) |
| 983 | return error; |
| 984 | |
| 985 | error = gfs2_change_nlink(dip, -1); |
| 986 | if (error) |
| 987 | return error; |
| 988 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 989 | gfs2_str2qstr(&dotname, "."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 990 | error = gfs2_dir_del(ip, &dotname); |
| 991 | if (error) |
| 992 | return error; |
| 993 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 994 | gfs2_str2qstr(&dotname, ".."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 995 | error = gfs2_dir_del(ip, &dotname); |
| 996 | if (error) |
| 997 | return error; |
| 998 | |
Steven Whitehouse | 4f56110 | 2006-11-01 14:04:17 -0500 | [diff] [blame] | 999 | /* It looks odd, but it really should be done twice */ |
| 1000 | error = gfs2_change_nlink(ip, -1); |
| 1001 | if (error) |
| 1002 | return error; |
| 1003 | |
| 1004 | error = gfs2_change_nlink(ip, -1); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1005 | if (error) |
| 1006 | return error; |
| 1007 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1008 | return error; |
| 1009 | } |
| 1010 | |
| 1011 | /* |
| 1012 | * gfs2_unlink_ok - check to see that a inode is still in a directory |
| 1013 | * @dip: the directory |
| 1014 | * @name: the name of the file |
| 1015 | * @ip: the inode |
| 1016 | * |
| 1017 | * Assumes that the lock on (at least) @dip is held. |
| 1018 | * |
| 1019 | * Returns: 0 if the parent/child relationship is correct, errno if it isn't |
| 1020 | */ |
| 1021 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1022 | int gfs2_unlink_ok(struct gfs2_inode *dip, const struct qstr *name, |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 1023 | const struct gfs2_inode *ip) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1024 | { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1025 | int error; |
| 1026 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1027 | if (IS_IMMUTABLE(&ip->i_inode) || IS_APPEND(&ip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1028 | return -EPERM; |
| 1029 | |
Steven Whitehouse | b60623c | 2006-11-01 12:22:46 -0500 | [diff] [blame] | 1030 | if ((dip->i_inode.i_mode & S_ISVTX) && |
Steven Whitehouse | 2933f92 | 2006-11-01 13:23:29 -0500 | [diff] [blame] | 1031 | dip->i_inode.i_uid != current->fsuid && |
| 1032 | ip->i_inode.i_uid != current->fsuid && !capable(CAP_FOWNER)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1033 | return -EPERM; |
| 1034 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1035 | if (IS_APPEND(&dip->i_inode)) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1036 | return -EPERM; |
| 1037 | |
Steven Whitehouse | faf450e | 2006-06-22 10:59:10 -0400 | [diff] [blame] | 1038 | error = permission(&dip->i_inode, MAY_WRITE | MAY_EXEC, NULL); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1039 | if (error) |
| 1040 | return error; |
| 1041 | |
Steven Whitehouse | dbb7cae | 2007-05-15 15:37:50 +0100 | [diff] [blame] | 1042 | error = gfs2_dir_check(&dip->i_inode, name, ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1043 | if (error) |
| 1044 | return error; |
| 1045 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1046 | return 0; |
| 1047 | } |
| 1048 | |
| 1049 | /* |
| 1050 | * gfs2_ok_to_move - check if it's ok to move a directory to another directory |
| 1051 | * @this: move this |
| 1052 | * @to: to here |
| 1053 | * |
| 1054 | * Follow @to back to the root and make sure we don't encounter @this |
| 1055 | * Assumes we already hold the rename lock. |
| 1056 | * |
| 1057 | * Returns: errno |
| 1058 | */ |
| 1059 | |
| 1060 | int gfs2_ok_to_move(struct gfs2_inode *this, struct gfs2_inode *to) |
| 1061 | { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1062 | struct inode *dir = &to->i_inode; |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 1063 | struct super_block *sb = dir->i_sb; |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1064 | struct inode *tmp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1065 | struct qstr dotdot; |
| 1066 | int error = 0; |
| 1067 | |
Steven Whitehouse | 71b86f5 | 2006-03-28 14:14:04 -0500 | [diff] [blame] | 1068 | gfs2_str2qstr(&dotdot, ".."); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1069 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1070 | igrab(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1071 | |
| 1072 | for (;;) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1073 | if (dir == &this->i_inode) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1074 | error = -EINVAL; |
| 1075 | break; |
| 1076 | } |
Steven Whitehouse | c9fd430 | 2006-03-01 15:31:02 -0500 | [diff] [blame] | 1077 | if (dir == sb->s_root->d_inode) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1078 | error = 0; |
| 1079 | break; |
| 1080 | } |
| 1081 | |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 1082 | tmp = gfs2_lookupi(dir, &dotdot, 1, NULL); |
| 1083 | if (IS_ERR(tmp)) { |
| 1084 | error = PTR_ERR(tmp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1085 | break; |
Steven Whitehouse | c752666 | 2006-03-20 12:30:04 -0500 | [diff] [blame] | 1086 | } |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1087 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1088 | iput(dir); |
| 1089 | dir = tmp; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1090 | } |
| 1091 | |
Steven Whitehouse | 7359a19 | 2006-02-13 12:27:43 +0000 | [diff] [blame] | 1092 | iput(dir); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1093 | |
| 1094 | return error; |
| 1095 | } |
| 1096 | |
| 1097 | /** |
| 1098 | * gfs2_readlinki - return the contents of a symlink |
| 1099 | * @ip: the symlink's inode |
| 1100 | * @buf: a pointer to the buffer to be filled |
| 1101 | * @len: a pointer to the length of @buf |
| 1102 | * |
| 1103 | * If @buf is too small, a piece of memory is kmalloc()ed and needs |
| 1104 | * to be freed by the caller. |
| 1105 | * |
| 1106 | * Returns: errno |
| 1107 | */ |
| 1108 | |
| 1109 | int gfs2_readlinki(struct gfs2_inode *ip, char **buf, unsigned int *len) |
| 1110 | { |
| 1111 | struct gfs2_holder i_gh; |
| 1112 | struct buffer_head *dibh; |
| 1113 | unsigned int x; |
| 1114 | int error; |
| 1115 | |
| 1116 | gfs2_holder_init(ip->i_gl, LM_ST_SHARED, GL_ATIME, &i_gh); |
| 1117 | error = gfs2_glock_nq_atime(&i_gh); |
| 1118 | if (error) { |
| 1119 | gfs2_holder_uninit(&i_gh); |
| 1120 | return error; |
| 1121 | } |
| 1122 | |
| 1123 | if (!ip->i_di.di_size) { |
| 1124 | gfs2_consist_inode(ip); |
| 1125 | error = -EIO; |
| 1126 | goto out; |
| 1127 | } |
| 1128 | |
| 1129 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1130 | if (error) |
| 1131 | goto out; |
| 1132 | |
| 1133 | x = ip->i_di.di_size + 1; |
| 1134 | if (x > *len) { |
| 1135 | *buf = kmalloc(x, GFP_KERNEL); |
| 1136 | if (!*buf) { |
| 1137 | error = -ENOMEM; |
| 1138 | goto out_brelse; |
| 1139 | } |
| 1140 | } |
| 1141 | |
| 1142 | memcpy(*buf, dibh->b_data + sizeof(struct gfs2_dinode), x); |
| 1143 | *len = x; |
| 1144 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1145 | out_brelse: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1146 | brelse(dibh); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1147 | out: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1148 | gfs2_glock_dq_uninit(&i_gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1149 | return error; |
| 1150 | } |
| 1151 | |
| 1152 | /** |
| 1153 | * gfs2_glock_nq_atime - Acquire a hold on an inode's glock, and |
| 1154 | * conditionally update the inode's atime |
| 1155 | * @gh: the holder to acquire |
| 1156 | * |
| 1157 | * Tests atime (access time) for gfs2_read, gfs2_readdir and gfs2_mmap |
| 1158 | * Update if the difference between the current time and the inode's current |
| 1159 | * atime is greater than an interval specified at mount. |
| 1160 | * |
| 1161 | * Returns: errno |
| 1162 | */ |
| 1163 | |
| 1164 | int gfs2_glock_nq_atime(struct gfs2_holder *gh) |
| 1165 | { |
| 1166 | struct gfs2_glock *gl = gh->gh_gl; |
| 1167 | struct gfs2_sbd *sdp = gl->gl_sbd; |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1168 | struct gfs2_inode *ip = gl->gl_object; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1169 | s64 quantum = gfs2_tune_get(sdp, gt_atime_quantum); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1170 | unsigned int state; |
| 1171 | int flags; |
| 1172 | int error; |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1173 | struct timespec tv = CURRENT_TIME; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1174 | |
| 1175 | if (gfs2_assert_warn(sdp, gh->gh_flags & GL_ATIME) || |
| 1176 | gfs2_assert_warn(sdp, !(gh->gh_flags & GL_ASYNC)) || |
| 1177 | gfs2_assert_warn(sdp, gl->gl_ops == &gfs2_inode_glops)) |
| 1178 | return -EINVAL; |
| 1179 | |
| 1180 | state = gh->gh_state; |
| 1181 | flags = gh->gh_flags; |
| 1182 | |
| 1183 | error = gfs2_glock_nq(gh); |
| 1184 | if (error) |
| 1185 | return error; |
| 1186 | |
| 1187 | if (test_bit(SDF_NOATIME, &sdp->sd_flags) || |
| 1188 | (sdp->sd_vfs->s_flags & MS_RDONLY)) |
| 1189 | return 0; |
| 1190 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1191 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1192 | gfs2_glock_dq(gh); |
Steven Whitehouse | fd88de56 | 2006-05-05 16:59:11 -0400 | [diff] [blame] | 1193 | gfs2_holder_reinit(LM_ST_EXCLUSIVE, gh->gh_flags & ~LM_FLAG_ANY, |
| 1194 | gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1195 | error = gfs2_glock_nq(gh); |
| 1196 | if (error) |
| 1197 | return error; |
| 1198 | |
| 1199 | /* Verify that atime hasn't been updated while we were |
| 1200 | trying to get exclusive lock. */ |
| 1201 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1202 | tv = CURRENT_TIME; |
| 1203 | if (tv.tv_sec - ip->i_inode.i_atime.tv_sec >= quantum) { |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1204 | struct buffer_head *dibh; |
Steven Whitehouse | 48516ce | 2006-10-02 12:39:19 -0400 | [diff] [blame] | 1205 | struct gfs2_dinode *di; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1206 | |
| 1207 | error = gfs2_trans_begin(sdp, RES_DINODE, 0); |
| 1208 | if (error == -EROFS) |
| 1209 | return 0; |
| 1210 | if (error) |
| 1211 | goto fail; |
| 1212 | |
| 1213 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1214 | if (error) |
| 1215 | goto fail_end_trans; |
| 1216 | |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1217 | ip->i_inode.i_atime = tv; |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1218 | |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1219 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 48516ce | 2006-10-02 12:39:19 -0400 | [diff] [blame] | 1220 | di = (struct gfs2_dinode *)dibh->b_data; |
Steven Whitehouse | 1a7b1ee | 2006-11-01 14:35:17 -0500 | [diff] [blame] | 1221 | 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] | 1222 | 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] | 1223 | brelse(dibh); |
| 1224 | |
| 1225 | gfs2_trans_end(sdp); |
| 1226 | } |
| 1227 | |
| 1228 | /* If someone else has asked for the glock, |
| 1229 | unlock and let them have it. Then reacquire |
| 1230 | in the original state. */ |
| 1231 | if (gfs2_glock_is_blocking(gl)) { |
| 1232 | gfs2_glock_dq(gh); |
| 1233 | gfs2_holder_reinit(state, flags, gh); |
| 1234 | return gfs2_glock_nq(gh); |
| 1235 | } |
| 1236 | } |
| 1237 | |
| 1238 | return 0; |
| 1239 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1240 | fail_end_trans: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1241 | gfs2_trans_end(sdp); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1242 | fail: |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1243 | gfs2_glock_dq(gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1244 | return error; |
| 1245 | } |
| 1246 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1247 | static int |
| 1248 | __gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) |
| 1249 | { |
| 1250 | struct buffer_head *dibh; |
| 1251 | int error; |
| 1252 | |
| 1253 | error = gfs2_meta_inode_buffer(ip, &dibh); |
| 1254 | if (!error) { |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1255 | error = inode_setattr(&ip->i_inode, attr); |
| 1256 | gfs2_assert_warn(GFS2_SB(&ip->i_inode), !error); |
Steven Whitehouse | d4e9c4c | 2006-01-18 11:19:28 +0000 | [diff] [blame] | 1257 | gfs2_trans_add_bh(ip->i_gl, dibh, 1); |
Steven Whitehouse | 539e5d6 | 2006-10-31 15:07:05 -0500 | [diff] [blame] | 1258 | gfs2_dinode_out(ip, dibh->b_data); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1259 | brelse(dibh); |
| 1260 | } |
| 1261 | return error; |
| 1262 | } |
| 1263 | |
| 1264 | /** |
| 1265 | * gfs2_setattr_simple - |
| 1266 | * @ip: |
| 1267 | * @attr: |
| 1268 | * |
| 1269 | * Called with a reference on the vnode. |
| 1270 | * |
| 1271 | * Returns: errno |
| 1272 | */ |
| 1273 | |
| 1274 | int gfs2_setattr_simple(struct gfs2_inode *ip, struct iattr *attr) |
| 1275 | { |
| 1276 | int error; |
| 1277 | |
Steven Whitehouse | 5c676f6 | 2006-02-27 17:23:27 -0500 | [diff] [blame] | 1278 | if (current->journal_info) |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1279 | return __gfs2_setattr_simple(ip, attr); |
| 1280 | |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1281 | error = gfs2_trans_begin(GFS2_SB(&ip->i_inode), RES_DINODE, 0); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1282 | if (error) |
| 1283 | return error; |
| 1284 | |
| 1285 | error = __gfs2_setattr_simple(ip, attr); |
Steven Whitehouse | feaa7bb | 2006-06-14 15:32:57 -0400 | [diff] [blame] | 1286 | gfs2_trans_end(GFS2_SB(&ip->i_inode)); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1287 | return error; |
| 1288 | } |
| 1289 | |
Steven Whitehouse | bb8d8a6 | 2007-06-01 14:11:58 +0100 | [diff] [blame] | 1290 | void gfs2_dinode_out(const struct gfs2_inode *ip, void *buf) |
| 1291 | { |
| 1292 | const struct gfs2_dinode_host *di = &ip->i_di; |
| 1293 | struct gfs2_dinode *str = buf; |
| 1294 | |
| 1295 | str->di_header.mh_magic = cpu_to_be32(GFS2_MAGIC); |
| 1296 | str->di_header.mh_type = cpu_to_be32(GFS2_METATYPE_DI); |
| 1297 | str->di_header.__pad0 = 0; |
| 1298 | str->di_header.mh_format = cpu_to_be32(GFS2_FORMAT_DI); |
| 1299 | str->di_header.__pad1 = 0; |
| 1300 | str->di_num.no_addr = cpu_to_be64(ip->i_no_addr); |
| 1301 | str->di_num.no_formal_ino = cpu_to_be64(ip->i_no_formal_ino); |
| 1302 | str->di_mode = cpu_to_be32(ip->i_inode.i_mode); |
| 1303 | str->di_uid = cpu_to_be32(ip->i_inode.i_uid); |
| 1304 | str->di_gid = cpu_to_be32(ip->i_inode.i_gid); |
| 1305 | str->di_nlink = cpu_to_be32(ip->i_inode.i_nlink); |
| 1306 | str->di_size = cpu_to_be64(di->di_size); |
| 1307 | str->di_blocks = cpu_to_be64(di->di_blocks); |
| 1308 | str->di_atime = cpu_to_be64(ip->i_inode.i_atime.tv_sec); |
| 1309 | str->di_mtime = cpu_to_be64(ip->i_inode.i_mtime.tv_sec); |
| 1310 | str->di_ctime = cpu_to_be64(ip->i_inode.i_ctime.tv_sec); |
| 1311 | |
| 1312 | str->di_goal_meta = cpu_to_be64(di->di_goal_meta); |
| 1313 | str->di_goal_data = cpu_to_be64(di->di_goal_data); |
| 1314 | str->di_generation = cpu_to_be64(di->di_generation); |
| 1315 | |
| 1316 | str->di_flags = cpu_to_be32(di->di_flags); |
| 1317 | str->di_height = cpu_to_be16(di->di_height); |
| 1318 | str->di_payload_format = cpu_to_be32(S_ISDIR(ip->i_inode.i_mode) && |
| 1319 | !(ip->i_di.di_flags & GFS2_DIF_EXHASH) ? |
| 1320 | GFS2_FORMAT_DE : 0); |
| 1321 | str->di_depth = cpu_to_be16(di->di_depth); |
| 1322 | str->di_entries = cpu_to_be32(di->di_entries); |
| 1323 | |
| 1324 | str->di_eattr = cpu_to_be64(di->di_eattr); |
Steven Whitehouse | 4bd91ba | 2007-06-05 09:39:18 +0100 | [diff] [blame] | 1325 | str->di_atime_nsec = cpu_to_be32(ip->i_inode.i_atime.tv_nsec); |
| 1326 | str->di_mtime_nsec = cpu_to_be32(ip->i_inode.i_mtime.tv_nsec); |
| 1327 | 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] | 1328 | } |
| 1329 | |
| 1330 | void gfs2_dinode_print(const struct gfs2_inode *ip) |
| 1331 | { |
| 1332 | const struct gfs2_dinode_host *di = &ip->i_di; |
| 1333 | |
| 1334 | printk(KERN_INFO " no_formal_ino = %llu\n", |
| 1335 | (unsigned long long)ip->i_no_formal_ino); |
| 1336 | printk(KERN_INFO " no_addr = %llu\n", |
| 1337 | (unsigned long long)ip->i_no_addr); |
| 1338 | printk(KERN_INFO " di_size = %llu\n", (unsigned long long)di->di_size); |
| 1339 | printk(KERN_INFO " di_blocks = %llu\n", |
| 1340 | (unsigned long long)di->di_blocks); |
| 1341 | printk(KERN_INFO " di_goal_meta = %llu\n", |
| 1342 | (unsigned long long)di->di_goal_meta); |
| 1343 | printk(KERN_INFO " di_goal_data = %llu\n", |
| 1344 | (unsigned long long)di->di_goal_data); |
| 1345 | printk(KERN_INFO " di_flags = 0x%.8X\n", di->di_flags); |
| 1346 | printk(KERN_INFO " di_height = %u\n", di->di_height); |
| 1347 | printk(KERN_INFO " di_depth = %u\n", di->di_depth); |
| 1348 | printk(KERN_INFO " di_entries = %u\n", di->di_entries); |
| 1349 | printk(KERN_INFO " di_eattr = %llu\n", |
| 1350 | (unsigned long long)di->di_eattr); |
| 1351 | } |
| 1352 | |