Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * linux/fs/sysv/inode.c |
| 3 | * |
| 4 | * minix/inode.c |
| 5 | * Copyright (C) 1991, 1992 Linus Torvalds |
| 6 | * |
| 7 | * xenix/inode.c |
| 8 | * Copyright (C) 1992 Doug Evans |
| 9 | * |
| 10 | * coh/inode.c |
| 11 | * Copyright (C) 1993 Pascal Haible, Bruno Haible |
| 12 | * |
| 13 | * sysv/inode.c |
| 14 | * Copyright (C) 1993 Paul B. Monday |
| 15 | * |
| 16 | * sysv/inode.c |
| 17 | * Copyright (C) 1993 Bruno Haible |
| 18 | * Copyright (C) 1997, 1998 Krzysztof G. Baranowski |
| 19 | * |
| 20 | * This file contains code for allocating/freeing inodes and for read/writing |
| 21 | * the superblock. |
| 22 | */ |
| 23 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/highuid.h> |
| 25 | #include <linux/slab.h> |
| 26 | #include <linux/init.h> |
| 27 | #include <linux/buffer_head.h> |
| 28 | #include <linux/vfs.h> |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 29 | #include <linux/writeback.h> |
Duane Griffin | 21acaf8 | 2008-12-19 20:47:16 +0000 | [diff] [blame] | 30 | #include <linux/namei.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include <asm/byteorder.h> |
| 32 | #include "sysv.h" |
| 33 | |
Christoph Hellwig | ad43ffd | 2009-06-08 10:07:45 +0200 | [diff] [blame] | 34 | static int sysv_sync_fs(struct super_block *sb, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | { |
| 36 | struct sysv_sb_info *sbi = SYSV_SB(sb); |
| 37 | unsigned long time = get_seconds(), old_time; |
| 38 | |
Marco Stornelli | c07cb01 | 2012-10-06 12:41:46 +0200 | [diff] [blame] | 39 | mutex_lock(&sbi->s_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
| 41 | /* |
| 42 | * If we are going to write out the super block, |
| 43 | * then attach current time stamp. |
| 44 | * But if the filesystem was marked clean, keep it clean. |
| 45 | */ |
| 46 | old_time = fs32_to_cpu(sbi, *sbi->s_sb_time); |
| 47 | if (sbi->s_type == FSTYPE_SYSV4) { |
| 48 | if (*sbi->s_sb_state == cpu_to_fs32(sbi, 0x7c269d38 - old_time)) |
| 49 | *sbi->s_sb_state = cpu_to_fs32(sbi, 0x7c269d38 - time); |
| 50 | *sbi->s_sb_time = cpu_to_fs32(sbi, time); |
| 51 | mark_buffer_dirty(sbi->s_bh2); |
| 52 | } |
Christoph Hellwig | ad43ffd | 2009-06-08 10:07:45 +0200 | [diff] [blame] | 53 | |
Marco Stornelli | c07cb01 | 2012-10-06 12:41:46 +0200 | [diff] [blame] | 54 | mutex_unlock(&sbi->s_lock); |
Christoph Hellwig | ad43ffd | 2009-06-08 10:07:45 +0200 | [diff] [blame] | 55 | |
| 56 | return 0; |
| 57 | } |
| 58 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | static int sysv_remount(struct super_block *sb, int *flags, char *data) |
| 60 | { |
| 61 | struct sysv_sb_info *sbi = SYSV_SB(sb); |
Artem Bityutskiy | eee4589 | 2012-07-03 16:43:27 +0300 | [diff] [blame] | 62 | |
Theodore Ts'o | 02b9984 | 2014-03-13 10:14:33 -0400 | [diff] [blame] | 63 | sync_filesystem(sb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | if (sbi->s_forced_ro) |
| 65 | *flags |= MS_RDONLY; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | return 0; |
| 67 | } |
| 68 | |
| 69 | static void sysv_put_super(struct super_block *sb) |
| 70 | { |
| 71 | struct sysv_sb_info *sbi = SYSV_SB(sb); |
| 72 | |
| 73 | if (!(sb->s_flags & MS_RDONLY)) { |
| 74 | /* XXX ext2 also updates the state here */ |
| 75 | mark_buffer_dirty(sbi->s_bh1); |
| 76 | if (sbi->s_bh1 != sbi->s_bh2) |
| 77 | mark_buffer_dirty(sbi->s_bh2); |
| 78 | } |
| 79 | |
| 80 | brelse(sbi->s_bh1); |
| 81 | if (sbi->s_bh1 != sbi->s_bh2) |
| 82 | brelse(sbi->s_bh2); |
| 83 | |
| 84 | kfree(sbi); |
| 85 | } |
| 86 | |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 87 | static int sysv_statfs(struct dentry *dentry, struct kstatfs *buf) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | { |
David Howells | 726c334 | 2006-06-23 02:02:58 -0700 | [diff] [blame] | 89 | struct super_block *sb = dentry->d_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | struct sysv_sb_info *sbi = SYSV_SB(sb); |
Coly Li | 1c5b454 | 2009-04-02 16:59:43 -0700 | [diff] [blame] | 91 | u64 id = huge_encode_dev(sb->s_bdev->bd_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | |
| 93 | buf->f_type = sb->s_magic; |
| 94 | buf->f_bsize = sb->s_blocksize; |
| 95 | buf->f_blocks = sbi->s_ndatazones; |
| 96 | buf->f_bavail = buf->f_bfree = sysv_count_free_blocks(sb); |
| 97 | buf->f_files = sbi->s_ninodes; |
| 98 | buf->f_ffree = sysv_count_free_inodes(sb); |
| 99 | buf->f_namelen = SYSV_NAMELEN; |
Coly Li | 1c5b454 | 2009-04-02 16:59:43 -0700 | [diff] [blame] | 100 | buf->f_fsid.val[0] = (u32)id; |
| 101 | buf->f_fsid.val[1] = (u32)(id >> 32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 102 | return 0; |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | * NXI <-> N0XI for PDP, XIN <-> XIN0 for le32, NIX <-> 0NIX for be32 |
| 107 | */ |
| 108 | static inline void read3byte(struct sysv_sb_info *sbi, |
| 109 | unsigned char * from, unsigned char * to) |
| 110 | { |
| 111 | if (sbi->s_bytesex == BYTESEX_PDP) { |
| 112 | to[0] = from[0]; |
| 113 | to[1] = 0; |
| 114 | to[2] = from[1]; |
| 115 | to[3] = from[2]; |
| 116 | } else if (sbi->s_bytesex == BYTESEX_LE) { |
| 117 | to[0] = from[0]; |
| 118 | to[1] = from[1]; |
| 119 | to[2] = from[2]; |
| 120 | to[3] = 0; |
| 121 | } else { |
| 122 | to[0] = 0; |
| 123 | to[1] = from[0]; |
| 124 | to[2] = from[1]; |
| 125 | to[3] = from[2]; |
| 126 | } |
| 127 | } |
| 128 | |
| 129 | static inline void write3byte(struct sysv_sb_info *sbi, |
| 130 | unsigned char * from, unsigned char * to) |
| 131 | { |
| 132 | if (sbi->s_bytesex == BYTESEX_PDP) { |
| 133 | to[0] = from[0]; |
| 134 | to[1] = from[2]; |
| 135 | to[2] = from[3]; |
| 136 | } else if (sbi->s_bytesex == BYTESEX_LE) { |
| 137 | to[0] = from[0]; |
| 138 | to[1] = from[1]; |
| 139 | to[2] = from[2]; |
| 140 | } else { |
| 141 | to[0] = from[1]; |
| 142 | to[1] = from[2]; |
| 143 | to[2] = from[3]; |
| 144 | } |
| 145 | } |
| 146 | |
Arjan van de Ven | c5ef1c4 | 2007-02-12 00:55:40 -0800 | [diff] [blame] | 147 | static const struct inode_operations sysv_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | .readlink = generic_readlink, |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 149 | .get_link = page_get_link, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | .put_link = page_put_link, |
| 151 | .getattr = sysv_getattr, |
| 152 | }; |
| 153 | |
| 154 | void sysv_set_inode(struct inode *inode, dev_t rdev) |
| 155 | { |
| 156 | if (S_ISREG(inode->i_mode)) { |
| 157 | inode->i_op = &sysv_file_inode_operations; |
| 158 | inode->i_fop = &sysv_file_operations; |
| 159 | inode->i_mapping->a_ops = &sysv_aops; |
| 160 | } else if (S_ISDIR(inode->i_mode)) { |
| 161 | inode->i_op = &sysv_dir_inode_operations; |
| 162 | inode->i_fop = &sysv_dir_operations; |
| 163 | inode->i_mapping->a_ops = &sysv_aops; |
| 164 | } else if (S_ISLNK(inode->i_mode)) { |
Al Viro | 0ebf7f1 | 2015-11-23 21:11:08 -0500 | [diff] [blame] | 165 | inode->i_op = &sysv_symlink_inode_operations; |
Al Viro | 21fc61c | 2015-11-17 01:07:57 -0500 | [diff] [blame] | 166 | inode_nohighmem(inode); |
Al Viro | 0ebf7f1 | 2015-11-23 21:11:08 -0500 | [diff] [blame] | 167 | inode->i_mapping->a_ops = &sysv_aops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | } else |
| 169 | init_special_inode(inode, inode->i_mode, rdev); |
| 170 | } |
| 171 | |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 172 | struct inode *sysv_iget(struct super_block *sb, unsigned int ino) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | struct sysv_sb_info * sbi = SYSV_SB(sb); |
| 175 | struct buffer_head * bh; |
| 176 | struct sysv_inode * raw_inode; |
| 177 | struct sysv_inode_info * si; |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 178 | struct inode *inode; |
| 179 | unsigned int block; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | |
| 181 | if (!ino || ino > sbi->s_ninodes) { |
| 182 | printk("Bad inode number on dev %s: %d is out of range\n", |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 183 | sb->s_id, ino); |
| 184 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | } |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 186 | |
| 187 | inode = iget_locked(sb, ino); |
| 188 | if (!inode) |
| 189 | return ERR_PTR(-ENOMEM); |
| 190 | if (!(inode->i_state & I_NEW)) |
| 191 | return inode; |
| 192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | raw_inode = sysv_raw_inode(sb, ino, &bh); |
| 194 | if (!raw_inode) { |
| 195 | printk("Major problem: unable to read inode from dev %s\n", |
| 196 | inode->i_sb->s_id); |
| 197 | goto bad_inode; |
| 198 | } |
| 199 | /* SystemV FS: kludge permissions if ino==SYSV_ROOT_INO ?? */ |
| 200 | inode->i_mode = fs16_to_cpu(sbi, raw_inode->i_mode); |
Eric W. Biederman | a726ecc | 2012-02-10 12:19:23 -0800 | [diff] [blame] | 201 | i_uid_write(inode, (uid_t)fs16_to_cpu(sbi, raw_inode->i_uid)); |
| 202 | i_gid_write(inode, (gid_t)fs16_to_cpu(sbi, raw_inode->i_gid)); |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 203 | set_nlink(inode, fs16_to_cpu(sbi, raw_inode->i_nlink)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | inode->i_size = fs32_to_cpu(sbi, raw_inode->i_size); |
| 205 | inode->i_atime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_atime); |
| 206 | inode->i_mtime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_mtime); |
| 207 | inode->i_ctime.tv_sec = fs32_to_cpu(sbi, raw_inode->i_ctime); |
| 208 | inode->i_ctime.tv_nsec = 0; |
| 209 | inode->i_atime.tv_nsec = 0; |
| 210 | inode->i_mtime.tv_nsec = 0; |
Theodore Ts'o | ba52de1 | 2006-09-27 01:50:49 -0700 | [diff] [blame] | 211 | inode->i_blocks = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
| 213 | si = SYSV_I(inode); |
| 214 | for (block = 0; block < 10+1+1+1; block++) |
| 215 | read3byte(sbi, &raw_inode->i_data[3*block], |
| 216 | (u8 *)&si->i_data[block]); |
| 217 | brelse(bh); |
| 218 | si->i_dir_start_lookup = 0; |
| 219 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 220 | sysv_set_inode(inode, |
| 221 | old_decode_dev(fs32_to_cpu(sbi, si->i_data[0]))); |
| 222 | else |
| 223 | sysv_set_inode(inode, 0); |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 224 | unlock_new_inode(inode); |
| 225 | return inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | |
| 227 | bad_inode: |
David Howells | b8e1343 | 2008-02-07 00:15:47 -0800 | [diff] [blame] | 228 | iget_failed(inode); |
| 229 | return ERR_PTR(-EIO); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 230 | } |
| 231 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 232 | static int __sysv_write_inode(struct inode *inode, int wait) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
| 234 | struct super_block * sb = inode->i_sb; |
| 235 | struct sysv_sb_info * sbi = SYSV_SB(sb); |
| 236 | struct buffer_head * bh; |
| 237 | struct sysv_inode * raw_inode; |
| 238 | struct sysv_inode_info * si; |
| 239 | unsigned int ino, block; |
Al Viro | 05459ca | 2009-06-07 15:29:45 -0400 | [diff] [blame] | 240 | int err = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | |
| 242 | ino = inode->i_ino; |
| 243 | if (!ino || ino > sbi->s_ninodes) { |
| 244 | printk("Bad inode number on dev %s: %d is out of range\n", |
| 245 | inode->i_sb->s_id, ino); |
Al Viro | 05459ca | 2009-06-07 15:29:45 -0400 | [diff] [blame] | 246 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
| 248 | raw_inode = sysv_raw_inode(sb, ino, &bh); |
| 249 | if (!raw_inode) { |
| 250 | printk("unable to read i-node block\n"); |
Al Viro | 05459ca | 2009-06-07 15:29:45 -0400 | [diff] [blame] | 251 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | } |
| 253 | |
| 254 | raw_inode->i_mode = cpu_to_fs16(sbi, inode->i_mode); |
Eric W. Biederman | a726ecc | 2012-02-10 12:19:23 -0800 | [diff] [blame] | 255 | raw_inode->i_uid = cpu_to_fs16(sbi, fs_high2lowuid(i_uid_read(inode))); |
| 256 | raw_inode->i_gid = cpu_to_fs16(sbi, fs_high2lowgid(i_gid_read(inode))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | raw_inode->i_nlink = cpu_to_fs16(sbi, inode->i_nlink); |
| 258 | raw_inode->i_size = cpu_to_fs32(sbi, inode->i_size); |
| 259 | raw_inode->i_atime = cpu_to_fs32(sbi, inode->i_atime.tv_sec); |
| 260 | raw_inode->i_mtime = cpu_to_fs32(sbi, inode->i_mtime.tv_sec); |
| 261 | raw_inode->i_ctime = cpu_to_fs32(sbi, inode->i_ctime.tv_sec); |
| 262 | |
| 263 | si = SYSV_I(inode); |
| 264 | if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) |
| 265 | si->i_data[0] = cpu_to_fs32(sbi, old_encode_dev(inode->i_rdev)); |
| 266 | for (block = 0; block < 10+1+1+1; block++) |
| 267 | write3byte(sbi, (u8 *)&si->i_data[block], |
| 268 | &raw_inode->i_data[3*block]); |
Al Viro | 05459ca | 2009-06-07 15:29:45 -0400 | [diff] [blame] | 269 | mark_buffer_dirty(bh); |
| 270 | if (wait) { |
| 271 | sync_dirty_buffer(bh); |
| 272 | if (buffer_req(bh) && !buffer_uptodate(bh)) { |
| 273 | printk ("IO error syncing sysv inode [%s:%08x]\n", |
| 274 | sb->s_id, ino); |
| 275 | err = -EIO; |
| 276 | } |
| 277 | } |
| 278 | brelse(bh); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | return 0; |
| 280 | } |
| 281 | |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 282 | int sysv_write_inode(struct inode *inode, struct writeback_control *wbc) |
| 283 | { |
| 284 | return __sysv_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL); |
| 285 | } |
| 286 | |
Al Viro | 05459ca | 2009-06-07 15:29:45 -0400 | [diff] [blame] | 287 | int sysv_sync_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | { |
Christoph Hellwig | a9185b4 | 2010-03-05 09:21:37 +0100 | [diff] [blame] | 289 | return __sysv_write_inode(inode, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | } |
| 291 | |
Al Viro | d299ead | 2010-06-05 19:16:20 -0400 | [diff] [blame] | 292 | static void sysv_evict_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | { |
Johannes Weiner | 91b0abe | 2014-04-03 14:47:49 -0700 | [diff] [blame] | 294 | truncate_inode_pages_final(&inode->i_data); |
Al Viro | d299ead | 2010-06-05 19:16:20 -0400 | [diff] [blame] | 295 | if (!inode->i_nlink) { |
| 296 | inode->i_size = 0; |
| 297 | sysv_truncate(inode); |
| 298 | } |
| 299 | invalidate_inode_buffers(inode); |
Jan Kara | dbd5768 | 2012-05-03 14:48:02 +0200 | [diff] [blame] | 300 | clear_inode(inode); |
Al Viro | d299ead | 2010-06-05 19:16:20 -0400 | [diff] [blame] | 301 | if (!inode->i_nlink) |
| 302 | sysv_free_inode(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | } |
| 304 | |
Christoph Lameter | e18b890 | 2006-12-06 20:33:20 -0800 | [diff] [blame] | 305 | static struct kmem_cache *sysv_inode_cachep; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | |
| 307 | static struct inode *sysv_alloc_inode(struct super_block *sb) |
| 308 | { |
| 309 | struct sysv_inode_info *si; |
| 310 | |
Christoph Lameter | e94b176 | 2006-12-06 20:33:17 -0800 | [diff] [blame] | 311 | si = kmem_cache_alloc(sysv_inode_cachep, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | if (!si) |
| 313 | return NULL; |
| 314 | return &si->vfs_inode; |
| 315 | } |
| 316 | |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 317 | static void sysv_i_callback(struct rcu_head *head) |
| 318 | { |
| 319 | struct inode *inode = container_of(head, struct inode, i_rcu); |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 320 | kmem_cache_free(sysv_inode_cachep, SYSV_I(inode)); |
| 321 | } |
| 322 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | static void sysv_destroy_inode(struct inode *inode) |
| 324 | { |
Nick Piggin | fa0d7e3d | 2011-01-07 17:49:49 +1100 | [diff] [blame] | 325 | call_rcu(&inode->i_rcu, sysv_i_callback); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Alexey Dobriyan | 51cc506 | 2008-07-25 19:45:34 -0700 | [diff] [blame] | 328 | static void init_once(void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
| 330 | struct sysv_inode_info *si = (struct sysv_inode_info *)p; |
| 331 | |
Christoph Lameter | a35afb8 | 2007-05-16 22:10:57 -0700 | [diff] [blame] | 332 | inode_init_once(&si->vfs_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | } |
| 334 | |
Josef 'Jeff' Sipek | ee9b6d6 | 2007-02-12 00:55:41 -0800 | [diff] [blame] | 335 | const struct super_operations sysv_sops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | .alloc_inode = sysv_alloc_inode, |
| 337 | .destroy_inode = sysv_destroy_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | .write_inode = sysv_write_inode, |
Al Viro | d299ead | 2010-06-05 19:16:20 -0400 | [diff] [blame] | 339 | .evict_inode = sysv_evict_inode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | .put_super = sysv_put_super, |
Christoph Hellwig | ad43ffd | 2009-06-08 10:07:45 +0200 | [diff] [blame] | 341 | .sync_fs = sysv_sync_fs, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | .remount_fs = sysv_remount, |
| 343 | .statfs = sysv_statfs, |
| 344 | }; |
| 345 | |
| 346 | int __init sysv_init_icache(void) |
| 347 | { |
| 348 | sysv_inode_cachep = kmem_cache_create("sysv_inode_cache", |
| 349 | sizeof(struct sysv_inode_info), 0, |
Paul Jackson | 4b6a931 | 2006-03-24 03:16:05 -0800 | [diff] [blame] | 350 | SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD, |
Paul Mundt | 20c2df8 | 2007-07-20 10:11:58 +0900 | [diff] [blame] | 351 | init_once); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | if (!sysv_inode_cachep) |
| 353 | return -ENOMEM; |
| 354 | return 0; |
| 355 | } |
| 356 | |
| 357 | void sysv_destroy_icache(void) |
| 358 | { |
Kirill A. Shutemov | 8c0a853 | 2012-09-26 11:33:07 +1000 | [diff] [blame] | 359 | /* |
| 360 | * Make sure all delayed rcu free inodes are flushed before we |
| 361 | * destroy cache. |
| 362 | */ |
| 363 | rcu_barrier(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | kmem_cache_destroy(sysv_inode_cachep); |
| 365 | } |