Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | |
| 2 | /* |
| 3 | * Directory operations for Coda filesystem |
| 4 | * Original version: (C) 1996 P. Braam and M. Callahan |
| 5 | * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University |
| 6 | * |
| 7 | * Carnegie Mellon encourages users to contribute improvements to |
| 8 | * the Coda project. Contact Peter Braam (coda@cs.cmu.edu). |
| 9 | */ |
| 10 | |
| 11 | #include <linux/types.h> |
| 12 | #include <linux/kernel.h> |
| 13 | #include <linux/time.h> |
| 14 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 16 | #include <linux/file.h> |
| 17 | #include <linux/stat.h> |
| 18 | #include <linux/errno.h> |
| 19 | #include <linux/string.h> |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 20 | #include <linux/spinlock.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | |
| 22 | #include <asm/uaccess.h> |
| 23 | |
| 24 | #include <linux/coda.h> |
| 25 | #include <linux/coda_linux.h> |
| 26 | #include <linux/coda_psdev.h> |
| 27 | #include <linux/coda_fs_i.h> |
| 28 | #include <linux/coda_cache.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | |
Adrian Bunk | c98d8cf | 2006-03-24 03:15:53 -0800 | [diff] [blame] | 30 | #include "coda_int.h" |
| 31 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | /* dir inode-ops */ |
| 33 | static int coda_create(struct inode *dir, struct dentry *new, int mode, struct nameidata *nd); |
| 34 | static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, struct nameidata *nd); |
| 35 | static int coda_link(struct dentry *old_dentry, struct inode *dir_inode, |
| 36 | struct dentry *entry); |
| 37 | static int coda_unlink(struct inode *dir_inode, struct dentry *entry); |
| 38 | static int coda_symlink(struct inode *dir_inode, struct dentry *entry, |
| 39 | const char *symname); |
| 40 | static int coda_mkdir(struct inode *dir_inode, struct dentry *entry, int mode); |
| 41 | static int coda_rmdir(struct inode *dir_inode, struct dentry *entry); |
| 42 | static int coda_rename(struct inode *old_inode, struct dentry *old_dentry, |
| 43 | struct inode *new_inode, struct dentry *new_dentry); |
| 44 | |
| 45 | /* dir file-ops */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 46 | static int coda_readdir(struct file *file, void *buf, filldir_t filldir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | /* dentry ops */ |
| 49 | static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd); |
Nick Piggin | fe15ce4 | 2011-01-07 17:49:23 +1100 | [diff] [blame] | 50 | static int coda_dentry_delete(const struct dentry *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
| 52 | /* support routines */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 53 | static int coda_venus_readdir(struct file *coda_file, void *buf, |
| 54 | filldir_t filldir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
| 56 | /* same as fs/bad_inode.c */ |
| 57 | static int coda_return_EIO(void) |
| 58 | { |
| 59 | return -EIO; |
| 60 | } |
| 61 | #define CODA_EIO_ERROR ((void *) (coda_return_EIO)) |
| 62 | |
Al Viro | e16404e | 2009-02-20 05:55:13 +0000 | [diff] [blame] | 63 | static const struct dentry_operations coda_dentry_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | { |
| 65 | .d_revalidate = coda_dentry_revalidate, |
| 66 | .d_delete = coda_dentry_delete, |
| 67 | }; |
| 68 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 69 | const struct inode_operations coda_dir_inode_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | { |
| 71 | .create = coda_create, |
| 72 | .lookup = coda_lookup, |
| 73 | .link = coda_link, |
| 74 | .unlink = coda_unlink, |
| 75 | .symlink = coda_symlink, |
| 76 | .mkdir = coda_mkdir, |
| 77 | .rmdir = coda_rmdir, |
| 78 | .mknod = CODA_EIO_ERROR, |
| 79 | .rename = coda_rename, |
| 80 | .permission = coda_permission, |
| 81 | .getattr = coda_getattr, |
| 82 | .setattr = coda_setattr, |
| 83 | }; |
| 84 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 85 | const struct file_operations coda_dir_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | .llseek = generic_file_llseek, |
| 87 | .read = generic_read_dir, |
| 88 | .readdir = coda_readdir, |
| 89 | .open = coda_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | .release = coda_release, |
| 91 | .fsync = coda_fsync, |
| 92 | }; |
| 93 | |
| 94 | |
| 95 | /* inode operations for directories */ |
| 96 | /* access routines: lookup, readlink, permission */ |
| 97 | static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, struct nameidata *nd) |
| 98 | { |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 99 | struct inode *inode = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | struct CodaFid resfid = { { 0, } }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | int type = 0; |
| 102 | int error = 0; |
| 103 | const char *name = entry->d_name.name; |
| 104 | size_t length = entry->d_name.len; |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 105 | |
| 106 | if (length > CODA_MAXNAMLEN) { |
| 107 | printk(KERN_ERR "name too long: lookup, %s (%*s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | coda_i2s(dir), (int)length, name); |
| 109 | return ERR_PTR(-ENAMETOOLONG); |
| 110 | } |
| 111 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 112 | /* control object, create inode on the fly */ |
| 113 | if (coda_isroot(dir) && coda_iscontrol(name, length)) { |
| 114 | error = coda_cnode_makectl(&inode, dir->i_sb); |
| 115 | type = CODA_NOCACHE; |
| 116 | goto exit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | } |
| 118 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 119 | error = venus_lookup(dir->i_sb, coda_i2f(dir), name, length, |
| 120 | &type, &resfid); |
| 121 | if (!error) |
| 122 | error = coda_cnode_make(&inode, &resfid, dir->i_sb); |
| 123 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 124 | if (error && error != -ENOENT) |
| 125 | return ERR_PTR(error); |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | exit: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | entry->d_op = &coda_dentry_operations; |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 129 | |
| 130 | if (inode && (type & CODA_NOCACHE)) |
| 131 | coda_flag_inode(inode, C_VATTR | C_PURGE); |
| 132 | |
| 133 | return d_splice_alias(inode, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 137 | int coda_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 139 | int error; |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 140 | |
| 141 | mask &= MAY_READ | MAY_WRITE | MAY_EXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 142 | |
| 143 | if (!mask) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 144 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 146 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 147 | return -EACCES; |
| 148 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | if (coda_cache_check(inode, mask)) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 150 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 152 | error = venus_access(inode->i_sb, coda_i2f(inode), mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | if (!error) |
| 155 | coda_cache_enter(inode, mask); |
| 156 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 157 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 161 | static inline void coda_dir_update_mtime(struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | { |
| 163 | #ifdef REQUERY_VENUS_FOR_MTIME |
| 164 | /* invalidate the directory cnode's attributes so we refetch the |
| 165 | * attributes from venus next time the inode is referenced */ |
| 166 | coda_flag_inode(dir, C_VATTR); |
| 167 | #else |
| 168 | /* optimistically we can also act as if our nose bleeds. The |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 169 | * granularity of the mtime is coarse anyways so we might actually be |
| 170 | * right most of the time. Note: we only do this for directories. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; |
| 172 | #endif |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 173 | } |
| 174 | |
| 175 | /* we have to wrap inc_nlink/drop_nlink because sometimes userspace uses a |
| 176 | * trick to fool GNU find's optimizations. If we can't be sure of the link |
| 177 | * (because of volume mount points) we set i_nlink to 1 which forces find |
| 178 | * to consider every child as a possible directory. We should also never |
| 179 | * see an increment or decrement for deleted directories where i_nlink == 0 */ |
| 180 | static inline void coda_dir_inc_nlink(struct inode *dir) |
| 181 | { |
| 182 | if (dir->i_nlink >= 2) |
| 183 | inc_nlink(dir); |
| 184 | } |
| 185 | |
| 186 | static inline void coda_dir_drop_nlink(struct inode *dir) |
| 187 | { |
| 188 | if (dir->i_nlink > 2) |
| 189 | drop_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | } |
| 191 | |
| 192 | /* creation routines: create, mknod, mkdir, link, symlink */ |
| 193 | static int coda_create(struct inode *dir, struct dentry *de, int mode, struct nameidata *nd) |
| 194 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 195 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 196 | const char *name=de->d_name.name; |
| 197 | int length=de->d_name.len; |
| 198 | struct inode *inode; |
| 199 | struct CodaFid newfid; |
| 200 | struct coda_vattr attrs; |
| 201 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 202 | if (coda_isroot(dir) && coda_iscontrol(name, length)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | |
| 205 | error = venus_create(dir->i_sb, coda_i2f(dir), name, length, |
| 206 | 0, mode, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 207 | if (error) |
| 208 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | |
| 210 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 211 | if (IS_ERR(inode)) { |
| 212 | error = PTR_ERR(inode); |
| 213 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | } |
| 215 | |
| 216 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 217 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 219 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 220 | err_out: |
| 221 | d_drop(de); |
| 222 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 223 | } |
| 224 | |
| 225 | static int coda_mkdir(struct inode *dir, struct dentry *de, int mode) |
| 226 | { |
| 227 | struct inode *inode; |
| 228 | struct coda_vattr attrs; |
| 229 | const char *name = de->d_name.name; |
| 230 | int len = de->d_name.len; |
| 231 | int error; |
| 232 | struct CodaFid newfid; |
| 233 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 234 | if (coda_isroot(dir) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
| 237 | attrs.va_mode = mode; |
| 238 | error = venus_mkdir(dir->i_sb, coda_i2f(dir), |
| 239 | name, len, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 240 | if (error) |
| 241 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 244 | if (IS_ERR(inode)) { |
| 245 | error = PTR_ERR(inode); |
| 246 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | } |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 248 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 250 | coda_dir_inc_nlink(dir); |
| 251 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 253 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 254 | err_out: |
| 255 | d_drop(de); |
| 256 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | } |
| 258 | |
| 259 | /* try to make de an entry in dir_inodde linked to source_de */ |
| 260 | static int coda_link(struct dentry *source_de, struct inode *dir_inode, |
| 261 | struct dentry *de) |
| 262 | { |
| 263 | struct inode *inode = source_de->d_inode; |
| 264 | const char * name = de->d_name.name; |
| 265 | int len = de->d_name.len; |
| 266 | int error; |
| 267 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 268 | if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | |
| 271 | error = venus_link(dir_inode->i_sb, coda_i2f(inode), |
| 272 | coda_i2f(dir_inode), (const char *)name, len); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 273 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 274 | d_drop(de); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 275 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 278 | coda_dir_update_mtime(dir_inode); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 279 | ihold(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | d_instantiate(de, inode); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 281 | inc_nlink(inode); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 282 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | } |
| 284 | |
| 285 | |
| 286 | static int coda_symlink(struct inode *dir_inode, struct dentry *de, |
| 287 | const char *symname) |
| 288 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 289 | const char *name = de->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | int len = de->d_name.len; |
| 291 | int symlen; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 292 | int error; |
Jan Harkes | 3cf01f2 | 2007-07-19 01:48:51 -0700 | [diff] [blame] | 293 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 294 | if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
| 297 | symlen = strlen(symname); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 298 | if (symlen > CODA_MAXPATHLEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 299 | return -ENAMETOOLONG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | |
| 301 | /* |
| 302 | * This entry is now negative. Since we do not create |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 303 | * an inode for the entry we have to drop it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | */ |
| 305 | d_drop(de); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 306 | error = venus_symlink(dir_inode->i_sb, coda_i2f(dir_inode), name, len, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | symname, symlen); |
| 308 | |
| 309 | /* mtime is no good anymore */ |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 310 | if (!error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 311 | coda_dir_update_mtime(dir_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 312 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 313 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | } |
| 315 | |
| 316 | /* destruction routines: unlink, rmdir */ |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 317 | static int coda_unlink(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | { |
| 319 | int error; |
| 320 | const char *name = de->d_name.name; |
| 321 | int len = de->d_name.len; |
| 322 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 323 | error = venus_remove(dir->i_sb, coda_i2f(dir), name, len); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 324 | if (error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 325 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 327 | coda_dir_update_mtime(dir); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 328 | drop_nlink(de->d_inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 329 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | } |
| 331 | |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 332 | static int coda_rmdir(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | { |
| 334 | const char *name = de->d_name.name; |
| 335 | int len = de->d_name.len; |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 336 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len); |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 339 | if (!error) { |
| 340 | /* VFS may delete the child */ |
| 341 | if (de->d_inode) |
| 342 | de->d_inode->i_nlink = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 344 | /* fix the link count of the parent */ |
| 345 | coda_dir_drop_nlink(dir); |
| 346 | coda_dir_update_mtime(dir); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 347 | } |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 348 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /* rename */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 352 | static int coda_rename(struct inode *old_dir, struct dentry *old_dentry, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | struct inode *new_dir, struct dentry *new_dentry) |
| 354 | { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 355 | const char *old_name = old_dentry->d_name.name; |
| 356 | const char *new_name = new_dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | int old_length = old_dentry->d_name.len; |
| 358 | int new_length = new_dentry->d_name.len; |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 359 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 361 | error = venus_rename(old_dir->i_sb, coda_i2f(old_dir), |
| 362 | coda_i2f(new_dir), old_length, new_length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | (const char *) old_name, (const char *)new_name); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 364 | if (!error) { |
| 365 | if (new_dentry->d_inode) { |
| 366 | if (S_ISDIR(new_dentry->d_inode->i_mode)) { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 367 | coda_dir_drop_nlink(old_dir); |
| 368 | coda_dir_inc_nlink(new_dir); |
| 369 | } |
| 370 | coda_dir_update_mtime(old_dir); |
| 371 | coda_dir_update_mtime(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 372 | coda_flag_inode(new_dentry->d_inode, C_VATTR); |
| 373 | } else { |
| 374 | coda_flag_inode(old_dir, C_VATTR); |
| 375 | coda_flag_inode(new_dir, C_VATTR); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 376 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | return error; |
| 379 | } |
| 380 | |
| 381 | |
| 382 | /* file operations for directories */ |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 383 | static int coda_readdir(struct file *coda_file, void *buf, filldir_t filldir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | struct coda_file_info *cfi; |
| 386 | struct file *host_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | int ret; |
| 388 | |
| 389 | cfi = CODA_FTOC(coda_file); |
| 390 | BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); |
| 391 | host_file = cfi->cfi_container; |
| 392 | |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 393 | if (!host_file->f_op) |
| 394 | return -ENOTDIR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 396 | if (host_file->f_op->readdir) |
| 397 | { |
| 398 | /* potemkin case: we were handed a directory inode. |
| 399 | * We can't use vfs_readdir because we have to keep the file |
| 400 | * position in sync between the coda_file and the host_file. |
| 401 | * and as such we need grab the inode mutex. */ |
| 402 | struct inode *host_inode = host_file->f_path.dentry->d_inode; |
| 403 | |
| 404 | mutex_lock(&host_inode->i_mutex); |
| 405 | host_file->f_pos = coda_file->f_pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | |
| 407 | ret = -ENOENT; |
| 408 | if (!IS_DEADDIR(host_inode)) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 409 | ret = host_file->f_op->readdir(host_file, buf, filldir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | file_accessed(host_file); |
| 411 | } |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 412 | |
| 413 | coda_file->f_pos = host_file->f_pos; |
| 414 | mutex_unlock(&host_inode->i_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | } |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 416 | else /* Venus: we must read Venus dirents from a file */ |
| 417 | ret = coda_venus_readdir(coda_file, buf, filldir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | |
| 419 | return ret; |
| 420 | } |
| 421 | |
| 422 | static inline unsigned int CDT2DT(unsigned char cdt) |
| 423 | { |
| 424 | unsigned int dt; |
| 425 | |
| 426 | switch(cdt) { |
| 427 | case CDT_UNKNOWN: dt = DT_UNKNOWN; break; |
| 428 | case CDT_FIFO: dt = DT_FIFO; break; |
| 429 | case CDT_CHR: dt = DT_CHR; break; |
| 430 | case CDT_DIR: dt = DT_DIR; break; |
| 431 | case CDT_BLK: dt = DT_BLK; break; |
| 432 | case CDT_REG: dt = DT_REG; break; |
| 433 | case CDT_LNK: dt = DT_LNK; break; |
| 434 | case CDT_SOCK: dt = DT_SOCK; break; |
| 435 | case CDT_WHT: dt = DT_WHT; break; |
| 436 | default: dt = DT_UNKNOWN; break; |
| 437 | } |
| 438 | return dt; |
| 439 | } |
| 440 | |
| 441 | /* support routines */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 442 | static int coda_venus_readdir(struct file *coda_file, void *buf, |
| 443 | filldir_t filldir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | { |
| 445 | int result = 0; /* # of entries returned */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 446 | struct coda_file_info *cfi; |
| 447 | struct coda_inode_info *cii; |
| 448 | struct file *host_file; |
| 449 | struct dentry *de; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | struct venus_dirent *vdir; |
| 451 | unsigned long vdir_size = |
| 452 | (unsigned long)(&((struct venus_dirent *)0)->d_name); |
| 453 | unsigned int type; |
| 454 | struct qstr name; |
| 455 | ino_t ino; |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 456 | int ret; |
| 457 | |
| 458 | cfi = CODA_FTOC(coda_file); |
| 459 | BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); |
| 460 | host_file = cfi->cfi_container; |
| 461 | |
| 462 | de = coda_file->f_path.dentry; |
| 463 | cii = ITOC(de->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 465 | vdir = kmalloc(sizeof(*vdir), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 466 | if (!vdir) return -ENOMEM; |
| 467 | |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 468 | if (coda_file->f_pos == 0) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 469 | ret = filldir(buf, ".", 1, 0, de->d_inode->i_ino, DT_DIR); |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 470 | if (ret < 0) |
| 471 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | result++; |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 473 | coda_file->f_pos++; |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 474 | } |
| 475 | if (coda_file->f_pos == 1) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 476 | ret = filldir(buf, "..", 2, 1, de->d_parent->d_inode->i_ino, DT_DIR); |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 477 | if (ret < 0) |
| 478 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | result++; |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 480 | coda_file->f_pos++; |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 481 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | while (1) { |
| 483 | /* read entries from the directory file */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 484 | ret = kernel_read(host_file, coda_file->f_pos - 2, (char *)vdir, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 485 | sizeof(*vdir)); |
| 486 | if (ret < 0) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 487 | printk(KERN_ERR "coda readdir: read dir %s failed %d\n", |
| 488 | coda_f2s(&cii->c_fid), ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | break; |
| 490 | } |
| 491 | if (ret == 0) break; /* end of directory file reached */ |
| 492 | |
| 493 | /* catch truncated reads */ |
| 494 | if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 495 | printk(KERN_ERR "coda readdir: short read on %s\n", |
| 496 | coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | ret = -EBADF; |
| 498 | break; |
| 499 | } |
| 500 | /* validate whether the directory file actually makes sense */ |
| 501 | if (vdir->d_reclen < vdir_size + vdir->d_namlen) { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 502 | printk(KERN_ERR "coda readdir: invalid dir %s\n", |
| 503 | coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | ret = -EBADF; |
| 505 | break; |
| 506 | } |
| 507 | |
| 508 | name.len = vdir->d_namlen; |
| 509 | name.name = vdir->d_name; |
| 510 | |
| 511 | /* Make sure we skip '.' and '..', we already got those */ |
| 512 | if (name.name[0] == '.' && (name.len == 1 || |
| 513 | (vdir->d_name[1] == '.' && name.len == 2))) |
| 514 | vdir->d_fileno = name.len = 0; |
| 515 | |
| 516 | /* skip null entries */ |
| 517 | if (vdir->d_fileno && name.len) { |
| 518 | /* try to look up this entry in the dcache, that way |
| 519 | * userspace doesn't have to worry about breaking |
| 520 | * getcwd by having mismatched inode numbers for |
| 521 | * internal volume mountpoints. */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 522 | ino = find_inode_number(de, &name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | if (!ino) ino = vdir->d_fileno; |
| 524 | |
| 525 | type = CDT2DT(vdir->d_type); |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 526 | ret = filldir(buf, name.name, name.len, |
| 527 | coda_file->f_pos, ino, type); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | /* failure means no space for filling in this round */ |
| 529 | if (ret < 0) break; |
| 530 | result++; |
| 531 | } |
| 532 | /* we'll always have progress because d_reclen is unsigned and |
| 533 | * we've already established it is non-zero. */ |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 534 | coda_file->f_pos += vdir->d_reclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 535 | } |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 536 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 537 | kfree(vdir); |
| 538 | return result ? result : ret; |
| 539 | } |
| 540 | |
| 541 | /* called when a cache lookup succeeds */ |
| 542 | static int coda_dentry_revalidate(struct dentry *de, struct nameidata *nd) |
| 543 | { |
| 544 | struct inode *inode = de->d_inode; |
| 545 | struct coda_inode_info *cii; |
| 546 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 547 | if (!inode || coda_isroot(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | goto out; |
| 549 | if (is_bad_inode(inode)) |
| 550 | goto bad; |
| 551 | |
| 552 | cii = ITOC(de->d_inode); |
| 553 | if (!(cii->c_flags & (C_PURGE | C_FLUSH))) |
| 554 | goto out; |
| 555 | |
| 556 | shrink_dcache_parent(de); |
| 557 | |
| 558 | /* propagate for a flush */ |
| 559 | if (cii->c_flags & C_FLUSH) |
| 560 | coda_flag_inode_children(inode, C_FLUSH); |
| 561 | |
| 562 | if (atomic_read(&de->d_count) > 1) |
| 563 | /* pretend it's valid, but don't change the flags */ |
| 564 | goto out; |
| 565 | |
| 566 | /* clear the flags. */ |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 567 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 569 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | bad: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | return 0; |
| 572 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 573 | return 1; |
| 574 | } |
| 575 | |
| 576 | /* |
| 577 | * This is the callback from dput() when d_count is going to 0. |
| 578 | * We use this to unhash dentries with bad inodes. |
| 579 | */ |
Nick Piggin | fe15ce4 | 2011-01-07 17:49:23 +1100 | [diff] [blame] | 580 | static int coda_dentry_delete(const struct dentry * dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 581 | { |
| 582 | int flags; |
| 583 | |
| 584 | if (!dentry->d_inode) |
| 585 | return 0; |
| 586 | |
| 587 | flags = (ITOC(dentry->d_inode)->c_flags) & C_PURGE; |
| 588 | if (is_bad_inode(dentry->d_inode) || flags) { |
| 589 | return 1; |
| 590 | } |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | |
| 595 | |
| 596 | /* |
| 597 | * This is called when we want to check if the inode has |
| 598 | * changed on the server. Coda makes this easy since the |
| 599 | * cache manager Venus issues a downcall to the kernel when this |
| 600 | * happens |
| 601 | */ |
| 602 | int coda_revalidate_inode(struct dentry *dentry) |
| 603 | { |
| 604 | struct coda_vattr attr; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 605 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | int old_mode; |
| 607 | ino_t old_ino; |
| 608 | struct inode *inode = dentry->d_inode; |
| 609 | struct coda_inode_info *cii = ITOC(inode); |
| 610 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 611 | if (!cii->c_flags) |
| 612 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | |
| 614 | if (cii->c_flags & (C_VATTR | C_PURGE | C_FLUSH)) { |
| 615 | error = venus_getattr(inode->i_sb, &(cii->c_fid), &attr); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 616 | if (error) |
| 617 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | |
| 619 | /* this inode may be lost if: |
| 620 | - it's ino changed |
| 621 | - type changes must be permitted for repair and |
| 622 | missing mount points. |
| 623 | */ |
| 624 | old_mode = inode->i_mode; |
| 625 | old_ino = inode->i_ino; |
| 626 | coda_vattr_to_iattr(inode, &attr); |
| 627 | |
| 628 | if ((old_mode & S_IFMT) != (inode->i_mode & S_IFMT)) { |
| 629 | printk("Coda: inode %ld, fid %s changed type!\n", |
| 630 | inode->i_ino, coda_f2s(&(cii->c_fid))); |
| 631 | } |
| 632 | |
| 633 | /* the following can happen when a local fid is replaced |
| 634 | with a global one, here we lose and declare the inode bad */ |
| 635 | if (inode->i_ino != old_ino) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 636 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 637 | |
| 638 | coda_flag_inode_children(inode, C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 639 | |
| 640 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 642 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 644 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 645 | } |