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> |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 21 | #include <linux/namei.h> |
Fabian Frederick | 834b46c | 2014-08-08 14:20:33 -0700 | [diff] [blame] | 22 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 23 | |
| 24 | #include <linux/coda.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/coda_psdev.h> |
Al Viro | 31a203d | 2011-01-12 16:36:09 -0500 | [diff] [blame] | 26 | #include "coda_linux.h" |
| 27 | #include "coda_cache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | |
Adrian Bunk | c98d8cf | 2006-03-24 03:15:53 -0800 | [diff] [blame] | 29 | #include "coda_int.h" |
| 30 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | /* dir inode-ops */ |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 32 | static int coda_create(struct inode *dir, struct dentry *new, umode_t mode, bool excl); |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 33 | static struct dentry *coda_lookup(struct inode *dir, struct dentry *target, unsigned int flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | static int coda_link(struct dentry *old_dentry, struct inode *dir_inode, |
| 35 | struct dentry *entry); |
| 36 | static int coda_unlink(struct inode *dir_inode, struct dentry *entry); |
| 37 | static int coda_symlink(struct inode *dir_inode, struct dentry *entry, |
| 38 | const char *symname); |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 39 | static int coda_mkdir(struct inode *dir_inode, struct dentry *entry, umode_t mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | static int coda_rmdir(struct inode *dir_inode, struct dentry *entry); |
| 41 | static int coda_rename(struct inode *old_inode, struct dentry *old_dentry, |
| 42 | struct inode *new_inode, struct dentry *new_dentry); |
| 43 | |
| 44 | /* dir file-ops */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 45 | static int coda_readdir(struct file *file, struct dir_context *ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | |
| 47 | /* dentry ops */ |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 48 | static int coda_dentry_revalidate(struct dentry *de, unsigned int flags); |
Nick Piggin | fe15ce4 | 2011-01-07 17:49:23 +1100 | [diff] [blame] | 49 | static int coda_dentry_delete(const struct dentry *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
| 51 | /* support routines */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 52 | static int coda_venus_readdir(struct file *, struct dir_context *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 53 | |
| 54 | /* same as fs/bad_inode.c */ |
| 55 | static int coda_return_EIO(void) |
| 56 | { |
| 57 | return -EIO; |
| 58 | } |
| 59 | #define CODA_EIO_ERROR ((void *) (coda_return_EIO)) |
| 60 | |
Al Viro | 9501e4c | 2011-01-12 16:25:02 -0500 | [diff] [blame] | 61 | const struct dentry_operations coda_dentry_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | { |
| 63 | .d_revalidate = coda_dentry_revalidate, |
| 64 | .d_delete = coda_dentry_delete, |
| 65 | }; |
| 66 | |
Arjan van de Ven | 754661f | 2007-02-12 00:55:38 -0800 | [diff] [blame] | 67 | const struct inode_operations coda_dir_inode_operations = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | { |
| 69 | .create = coda_create, |
| 70 | .lookup = coda_lookup, |
| 71 | .link = coda_link, |
| 72 | .unlink = coda_unlink, |
| 73 | .symlink = coda_symlink, |
| 74 | .mkdir = coda_mkdir, |
| 75 | .rmdir = coda_rmdir, |
| 76 | .mknod = CODA_EIO_ERROR, |
| 77 | .rename = coda_rename, |
| 78 | .permission = coda_permission, |
| 79 | .getattr = coda_getattr, |
| 80 | .setattr = coda_setattr, |
| 81 | }; |
| 82 | |
Arjan van de Ven | 4b6f5d2 | 2006-03-28 01:56:42 -0800 | [diff] [blame] | 83 | const struct file_operations coda_dir_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | .llseek = generic_file_llseek, |
| 85 | .read = generic_read_dir, |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 86 | .iterate = coda_readdir, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | .open = coda_open, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | .release = coda_release, |
| 89 | .fsync = coda_fsync, |
| 90 | }; |
| 91 | |
| 92 | |
| 93 | /* inode operations for directories */ |
| 94 | /* access routines: lookup, readlink, permission */ |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 95 | static struct dentry *coda_lookup(struct inode *dir, struct dentry *entry, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 97 | struct super_block *sb = dir->i_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | const char *name = entry->d_name.name; |
| 99 | size_t length = entry->d_name.len; |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 100 | struct inode *inode; |
| 101 | int type = 0; |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 102 | |
| 103 | if (length > CODA_MAXNAMLEN) { |
Fabian Frederick | d9b4b31 | 2014-06-06 14:36:18 -0700 | [diff] [blame] | 104 | pr_err("name too long: lookup, %s (%*s)\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | coda_i2s(dir), (int)length, name); |
| 106 | return ERR_PTR(-ENAMETOOLONG); |
| 107 | } |
| 108 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 109 | /* control object, create inode on the fly */ |
| 110 | if (coda_isroot(dir) && coda_iscontrol(name, length)) { |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 111 | inode = coda_cnode_makectl(sb); |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 112 | type = CODA_NOCACHE; |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 113 | } else { |
| 114 | struct CodaFid fid = { { 0, } }; |
| 115 | int error = venus_lookup(sb, coda_i2f(dir), name, length, |
| 116 | &type, &fid); |
| 117 | inode = !error ? coda_cnode_make(&fid, sb) : ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | } |
| 119 | |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 120 | if (!IS_ERR(inode) && (type & CODA_NOCACHE)) |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 121 | coda_flag_inode(inode, C_VATTR | C_PURGE); |
| 122 | |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 123 | if (inode == ERR_PTR(-ENOENT)) |
| 124 | inode = NULL; |
| 125 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 126 | return d_splice_alias(inode, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | } |
| 128 | |
| 129 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 130 | int coda_permission(struct inode *inode, int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 132 | int error; |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 133 | |
Al Viro | 10556cb | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 134 | if (mask & MAY_NOT_BLOCK) |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 135 | return -ECHILD; |
| 136 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 137 | mask &= MAY_READ | MAY_WRITE | MAY_EXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
| 139 | if (!mask) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 140 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 142 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 143 | return -EACCES; |
| 144 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 145 | if (coda_cache_check(inode, mask)) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 146 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 148 | error = venus_access(inode->i_sb, coda_i2f(inode), mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | if (!error) |
| 151 | coda_cache_enter(inode, mask); |
| 152 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 153 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 157 | static inline void coda_dir_update_mtime(struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
| 159 | #ifdef REQUERY_VENUS_FOR_MTIME |
| 160 | /* invalidate the directory cnode's attributes so we refetch the |
| 161 | * attributes from venus next time the inode is referenced */ |
| 162 | coda_flag_inode(dir, C_VATTR); |
| 163 | #else |
| 164 | /* optimistically we can also act as if our nose bleeds. The |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 165 | * granularity of the mtime is coarse anyways so we might actually be |
| 166 | * right most of the time. Note: we only do this for directories. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC; |
| 168 | #endif |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 169 | } |
| 170 | |
| 171 | /* we have to wrap inc_nlink/drop_nlink because sometimes userspace uses a |
| 172 | * trick to fool GNU find's optimizations. If we can't be sure of the link |
| 173 | * (because of volume mount points) we set i_nlink to 1 which forces find |
| 174 | * to consider every child as a possible directory. We should also never |
| 175 | * see an increment or decrement for deleted directories where i_nlink == 0 */ |
| 176 | static inline void coda_dir_inc_nlink(struct inode *dir) |
| 177 | { |
| 178 | if (dir->i_nlink >= 2) |
| 179 | inc_nlink(dir); |
| 180 | } |
| 181 | |
| 182 | static inline void coda_dir_drop_nlink(struct inode *dir) |
| 183 | { |
| 184 | if (dir->i_nlink > 2) |
| 185 | drop_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | /* creation routines: create, mknod, mkdir, link, symlink */ |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 189 | static int coda_create(struct inode *dir, struct dentry *de, umode_t mode, bool excl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 191 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | const char *name=de->d_name.name; |
| 193 | int length=de->d_name.len; |
| 194 | struct inode *inode; |
| 195 | struct CodaFid newfid; |
| 196 | struct coda_vattr attrs; |
| 197 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 198 | if (coda_isroot(dir) && coda_iscontrol(name, length)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | |
| 201 | error = venus_create(dir->i_sb, coda_i2f(dir), name, length, |
| 202 | 0, mode, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 203 | if (error) |
| 204 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
| 206 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 207 | if (IS_ERR(inode)) { |
| 208 | error = PTR_ERR(inode); |
| 209 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | } |
| 211 | |
| 212 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 213 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 215 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 216 | err_out: |
| 217 | d_drop(de); |
| 218 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | } |
| 220 | |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 221 | static int coda_mkdir(struct inode *dir, struct dentry *de, umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
| 223 | struct inode *inode; |
| 224 | struct coda_vattr attrs; |
| 225 | const char *name = de->d_name.name; |
| 226 | int len = de->d_name.len; |
| 227 | int error; |
| 228 | struct CodaFid newfid; |
| 229 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 230 | if (coda_isroot(dir) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | |
| 233 | attrs.va_mode = mode; |
| 234 | error = venus_mkdir(dir->i_sb, coda_i2f(dir), |
| 235 | name, len, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 236 | if (error) |
| 237 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 240 | if (IS_ERR(inode)) { |
| 241 | error = PTR_ERR(inode); |
| 242 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 244 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 246 | coda_dir_inc_nlink(dir); |
| 247 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 249 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 250 | err_out: |
| 251 | d_drop(de); |
| 252 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | } |
| 254 | |
| 255 | /* try to make de an entry in dir_inodde linked to source_de */ |
| 256 | static int coda_link(struct dentry *source_de, struct inode *dir_inode, |
| 257 | struct dentry *de) |
| 258 | { |
| 259 | struct inode *inode = source_de->d_inode; |
| 260 | const char * name = de->d_name.name; |
| 261 | int len = de->d_name.len; |
| 262 | int error; |
| 263 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 264 | if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | error = venus_link(dir_inode->i_sb, coda_i2f(inode), |
| 268 | coda_i2f(dir_inode), (const char *)name, len); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 269 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | d_drop(de); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 271 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | } |
| 273 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 274 | coda_dir_update_mtime(dir_inode); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 275 | ihold(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | d_instantiate(de, inode); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 277 | inc_nlink(inode); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 278 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | } |
| 280 | |
| 281 | |
| 282 | static int coda_symlink(struct inode *dir_inode, struct dentry *de, |
| 283 | const char *symname) |
| 284 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 285 | const char *name = de->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 286 | int len = de->d_name.len; |
| 287 | int symlen; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 288 | int error; |
Jan Harkes | 3cf01f2 | 2007-07-19 01:48:51 -0700 | [diff] [blame] | 289 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 290 | if (coda_isroot(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
| 293 | symlen = strlen(symname); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 294 | if (symlen > CODA_MAXPATHLEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | return -ENAMETOOLONG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | |
| 297 | /* |
| 298 | * This entry is now negative. Since we do not create |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 299 | * an inode for the entry we have to drop it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | */ |
| 301 | d_drop(de); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 302 | 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] | 303 | symname, symlen); |
| 304 | |
| 305 | /* mtime is no good anymore */ |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 306 | if (!error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 307 | coda_dir_update_mtime(dir_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 309 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | } |
| 311 | |
| 312 | /* destruction routines: unlink, rmdir */ |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 313 | static int coda_unlink(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | { |
| 315 | int error; |
| 316 | const char *name = de->d_name.name; |
| 317 | int len = de->d_name.len; |
| 318 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 319 | error = venus_remove(dir->i_sb, coda_i2f(dir), name, len); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 320 | if (error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 321 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 323 | coda_dir_update_mtime(dir); |
Dave Hansen | 9a53c3a | 2006-09-30 23:29:03 -0700 | [diff] [blame] | 324 | drop_nlink(de->d_inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 325 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | } |
| 327 | |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 328 | static int coda_rmdir(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | { |
| 330 | const char *name = de->d_name.name; |
| 331 | int len = de->d_name.len; |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 332 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len); |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 335 | if (!error) { |
| 336 | /* VFS may delete the child */ |
| 337 | if (de->d_inode) |
Miklos Szeredi | 6d6b77f | 2011-10-28 14:13:28 +0200 | [diff] [blame] | 338 | clear_nlink(de->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 340 | /* fix the link count of the parent */ |
| 341 | coda_dir_drop_nlink(dir); |
| 342 | coda_dir_update_mtime(dir); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 343 | } |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 344 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | } |
| 346 | |
| 347 | /* rename */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 348 | static int coda_rename(struct inode *old_dir, struct dentry *old_dentry, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | struct inode *new_dir, struct dentry *new_dentry) |
| 350 | { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 351 | const char *old_name = old_dentry->d_name.name; |
| 352 | const char *new_name = new_dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | int old_length = old_dentry->d_name.len; |
| 354 | int new_length = new_dentry->d_name.len; |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 355 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 357 | error = venus_rename(old_dir->i_sb, coda_i2f(old_dir), |
| 358 | coda_i2f(new_dir), old_length, new_length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | (const char *) old_name, (const char *)new_name); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 360 | if (!error) { |
| 361 | if (new_dentry->d_inode) { |
| 362 | if (S_ISDIR(new_dentry->d_inode->i_mode)) { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 363 | coda_dir_drop_nlink(old_dir); |
| 364 | coda_dir_inc_nlink(new_dir); |
| 365 | } |
| 366 | coda_dir_update_mtime(old_dir); |
| 367 | coda_dir_update_mtime(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | coda_flag_inode(new_dentry->d_inode, C_VATTR); |
| 369 | } else { |
| 370 | coda_flag_inode(old_dir, C_VATTR); |
| 371 | coda_flag_inode(new_dir, C_VATTR); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 372 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | return error; |
| 375 | } |
| 376 | |
| 377 | |
| 378 | /* file operations for directories */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 379 | static int coda_readdir(struct file *coda_file, struct dir_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 380 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | struct coda_file_info *cfi; |
| 382 | struct file *host_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 383 | int ret; |
| 384 | |
| 385 | cfi = CODA_FTOC(coda_file); |
| 386 | BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); |
| 387 | host_file = cfi->cfi_container; |
| 388 | |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 389 | if (host_file->f_op->iterate) { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 390 | struct inode *host_inode = file_inode(host_file); |
Al Viro | bb6f619 | 2013-05-15 18:49:12 -0400 | [diff] [blame] | 391 | mutex_lock(&host_inode->i_mutex); |
| 392 | ret = -ENOENT; |
| 393 | if (!IS_DEADDIR(host_inode)) { |
| 394 | ret = host_file->f_op->iterate(host_file, ctx); |
| 395 | file_accessed(host_file); |
| 396 | } |
| 397 | mutex_unlock(&host_inode->i_mutex); |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 398 | return ret; |
| 399 | } |
| 400 | /* Venus: we must read Venus dirents from a file */ |
| 401 | return coda_venus_readdir(coda_file, ctx); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | } |
| 403 | |
| 404 | static inline unsigned int CDT2DT(unsigned char cdt) |
| 405 | { |
| 406 | unsigned int dt; |
| 407 | |
| 408 | switch(cdt) { |
| 409 | case CDT_UNKNOWN: dt = DT_UNKNOWN; break; |
| 410 | case CDT_FIFO: dt = DT_FIFO; break; |
| 411 | case CDT_CHR: dt = DT_CHR; break; |
| 412 | case CDT_DIR: dt = DT_DIR; break; |
| 413 | case CDT_BLK: dt = DT_BLK; break; |
| 414 | case CDT_REG: dt = DT_REG; break; |
| 415 | case CDT_LNK: dt = DT_LNK; break; |
| 416 | case CDT_SOCK: dt = DT_SOCK; break; |
| 417 | case CDT_WHT: dt = DT_WHT; break; |
| 418 | default: dt = DT_UNKNOWN; break; |
| 419 | } |
| 420 | return dt; |
| 421 | } |
| 422 | |
| 423 | /* support routines */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 424 | static int coda_venus_readdir(struct file *coda_file, struct dir_context *ctx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 425 | { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 426 | struct coda_file_info *cfi; |
| 427 | struct coda_inode_info *cii; |
| 428 | struct file *host_file; |
| 429 | struct dentry *de; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | struct venus_dirent *vdir; |
Al Viro | ee60498 | 2011-07-16 17:06:30 -0400 | [diff] [blame] | 431 | unsigned long vdir_size = offsetof(struct venus_dirent, d_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 432 | unsigned int type; |
| 433 | struct qstr name; |
| 434 | ino_t ino; |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 435 | int ret; |
| 436 | |
| 437 | cfi = CODA_FTOC(coda_file); |
| 438 | BUG_ON(!cfi || cfi->cfi_magic != CODA_MAGIC); |
| 439 | host_file = cfi->cfi_container; |
| 440 | |
| 441 | de = coda_file->f_path.dentry; |
| 442 | cii = ITOC(de->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 444 | vdir = kmalloc(sizeof(*vdir), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | if (!vdir) return -ENOMEM; |
| 446 | |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 447 | if (!dir_emit_dots(coda_file, ctx)) |
| 448 | goto out; |
| 449 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | while (1) { |
| 451 | /* read entries from the directory file */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 452 | ret = kernel_read(host_file, ctx->pos - 2, (char *)vdir, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | sizeof(*vdir)); |
| 454 | if (ret < 0) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 455 | pr_err("%s: read dir %s failed %d\n", |
| 456 | __func__, coda_f2s(&cii->c_fid), ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | break; |
| 458 | } |
| 459 | if (ret == 0) break; /* end of directory file reached */ |
| 460 | |
| 461 | /* catch truncated reads */ |
| 462 | if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 463 | pr_err("%s: short read on %s\n", |
| 464 | __func__, coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | ret = -EBADF; |
| 466 | break; |
| 467 | } |
| 468 | /* validate whether the directory file actually makes sense */ |
| 469 | if (vdir->d_reclen < vdir_size + vdir->d_namlen) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 470 | pr_err("%s: invalid dir %s\n", |
| 471 | __func__, coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 472 | ret = -EBADF; |
| 473 | break; |
| 474 | } |
| 475 | |
| 476 | name.len = vdir->d_namlen; |
| 477 | name.name = vdir->d_name; |
| 478 | |
| 479 | /* Make sure we skip '.' and '..', we already got those */ |
| 480 | if (name.name[0] == '.' && (name.len == 1 || |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 481 | (name.name[1] == '.' && name.len == 2))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | vdir->d_fileno = name.len = 0; |
| 483 | |
| 484 | /* skip null entries */ |
| 485 | if (vdir->d_fileno && name.len) { |
Al Viro | 6b5e122 | 2013-06-19 13:21:03 +0400 | [diff] [blame] | 486 | ino = vdir->d_fileno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | type = CDT2DT(vdir->d_type); |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 488 | if (!dir_emit(ctx, name.name, name.len, ino, type)) |
| 489 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | } |
| 491 | /* we'll always have progress because d_reclen is unsigned and |
| 492 | * we've already established it is non-zero. */ |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 493 | ctx->pos += vdir->d_reclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | } |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 495 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | kfree(vdir); |
Al Viro | e924f25 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 497 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 498 | } |
| 499 | |
| 500 | /* called when a cache lookup succeeds */ |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 501 | static int coda_dentry_revalidate(struct dentry *de, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 502 | { |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 503 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | struct coda_inode_info *cii; |
| 505 | |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 506 | if (flags & LOOKUP_RCU) |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 507 | return -ECHILD; |
| 508 | |
| 509 | inode = de->d_inode; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 510 | if (!inode || coda_isroot(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | goto out; |
| 512 | if (is_bad_inode(inode)) |
| 513 | goto bad; |
| 514 | |
| 515 | cii = ITOC(de->d_inode); |
| 516 | if (!(cii->c_flags & (C_PURGE | C_FLUSH))) |
| 517 | goto out; |
| 518 | |
| 519 | shrink_dcache_parent(de); |
| 520 | |
| 521 | /* propagate for a flush */ |
| 522 | if (cii->c_flags & C_FLUSH) |
| 523 | coda_flag_inode_children(inode, C_FLUSH); |
| 524 | |
Al Viro | 84d08fa | 2013-07-05 18:59:33 +0400 | [diff] [blame] | 525 | if (d_count(de) > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | /* pretend it's valid, but don't change the flags */ |
| 527 | goto out; |
| 528 | |
| 529 | /* clear the flags. */ |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 530 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 531 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 532 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | bad: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | return 0; |
| 535 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | return 1; |
| 537 | } |
| 538 | |
| 539 | /* |
| 540 | * This is the callback from dput() when d_count is going to 0. |
| 541 | * We use this to unhash dentries with bad inodes. |
| 542 | */ |
Nick Piggin | fe15ce4 | 2011-01-07 17:49:23 +1100 | [diff] [blame] | 543 | static int coda_dentry_delete(const struct dentry * dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | { |
| 545 | int flags; |
| 546 | |
| 547 | if (!dentry->d_inode) |
| 548 | return 0; |
| 549 | |
| 550 | flags = (ITOC(dentry->d_inode)->c_flags) & C_PURGE; |
| 551 | if (is_bad_inode(dentry->d_inode) || flags) { |
| 552 | return 1; |
| 553 | } |
| 554 | return 0; |
| 555 | } |
| 556 | |
| 557 | |
| 558 | |
| 559 | /* |
| 560 | * This is called when we want to check if the inode has |
| 561 | * changed on the server. Coda makes this easy since the |
| 562 | * cache manager Venus issues a downcall to the kernel when this |
| 563 | * happens |
| 564 | */ |
Al Viro | 11d100d | 2013-10-04 18:17:02 -0400 | [diff] [blame] | 565 | int coda_revalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | { |
| 567 | struct coda_vattr attr; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 568 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 569 | int old_mode; |
| 570 | ino_t old_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | struct coda_inode_info *cii = ITOC(inode); |
| 572 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 573 | if (!cii->c_flags) |
| 574 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 575 | |
| 576 | if (cii->c_flags & (C_VATTR | C_PURGE | C_FLUSH)) { |
| 577 | error = venus_getattr(inode->i_sb, &(cii->c_fid), &attr); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 578 | if (error) |
| 579 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | |
| 581 | /* this inode may be lost if: |
| 582 | - it's ino changed |
| 583 | - type changes must be permitted for repair and |
| 584 | missing mount points. |
| 585 | */ |
| 586 | old_mode = inode->i_mode; |
| 587 | old_ino = inode->i_ino; |
| 588 | coda_vattr_to_iattr(inode, &attr); |
| 589 | |
| 590 | if ((old_mode & S_IFMT) != (inode->i_mode & S_IFMT)) { |
Fabian Frederick | f38cfb2 | 2014-06-06 14:36:19 -0700 | [diff] [blame] | 591 | pr_warn("inode %ld, fid %s changed type!\n", |
Fabian Frederick | d9b4b31 | 2014-06-06 14:36:18 -0700 | [diff] [blame] | 592 | inode->i_ino, coda_f2s(&(cii->c_fid))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | } |
| 594 | |
| 595 | /* the following can happen when a local fid is replaced |
| 596 | with a global one, here we lose and declare the inode bad */ |
| 597 | if (inode->i_ino != old_ino) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 598 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | |
| 600 | coda_flag_inode_children(inode, C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 601 | |
| 602 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 604 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |