Greg Kroah-Hartman | b244131 | 2017-11-01 15:07:57 +0100 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | |
| 3 | /* |
| 4 | * Directory operations for Coda filesystem |
| 5 | * Original version: (C) 1996 P. Braam and M. Callahan |
| 6 | * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University |
| 7 | * |
| 8 | * Carnegie Mellon encourages users to contribute improvements to |
| 9 | * the Coda project. Contact Peter Braam (coda@cs.cmu.edu). |
| 10 | */ |
| 11 | |
| 12 | #include <linux/types.h> |
| 13 | #include <linux/kernel.h> |
| 14 | #include <linux/time.h> |
| 15 | #include <linux/fs.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 16 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | #include <linux/file.h> |
| 18 | #include <linux/stat.h> |
| 19 | #include <linux/errno.h> |
| 20 | #include <linux/string.h> |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 21 | #include <linux/spinlock.h> |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 22 | #include <linux/namei.h> |
Fabian Frederick | 834b46c | 2014-08-08 14:20:33 -0700 | [diff] [blame] | 23 | #include <linux/uaccess.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
| 25 | #include <linux/coda.h> |
David Howells | 8fc8b9d | 2019-07-16 16:28:47 -0700 | [diff] [blame] | 26 | #include "coda_psdev.h" |
Al Viro | 31a203d | 2011-01-12 16:36:09 -0500 | [diff] [blame] | 27 | #include "coda_linux.h" |
| 28 | #include "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 | /* same as fs/bad_inode.c */ |
| 33 | static int coda_return_EIO(void) |
| 34 | { |
| 35 | return -EIO; |
| 36 | } |
| 37 | #define CODA_EIO_ERROR ((void *) (coda_return_EIO)) |
| 38 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 39 | /* inode operations for directories */ |
| 40 | /* access routines: lookup, readlink, permission */ |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 41 | 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] | 42 | { |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 43 | struct super_block *sb = dir->i_sb; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | const char *name = entry->d_name.name; |
| 45 | size_t length = entry->d_name.len; |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 46 | struct inode *inode; |
| 47 | int type = 0; |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 48 | |
| 49 | if (length > CODA_MAXNAMLEN) { |
Jan Harkes | 9a05671 | 2019-07-16 16:28:23 -0700 | [diff] [blame] | 50 | pr_err("name too long: lookup, %s %zu\n", |
| 51 | coda_i2s(dir), length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | return ERR_PTR(-ENAMETOOLONG); |
| 53 | } |
| 54 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 55 | /* control object, create inode on the fly */ |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 56 | if (is_root_inode(dir) && coda_iscontrol(name, length)) { |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 57 | inode = coda_cnode_makectl(sb); |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 58 | type = CODA_NOCACHE; |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 59 | } else { |
| 60 | struct CodaFid fid = { { 0, } }; |
| 61 | int error = venus_lookup(sb, coda_i2f(dir), name, length, |
| 62 | &type, &fid); |
| 63 | inode = !error ? coda_cnode_make(&fid, sb) : ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | } |
| 65 | |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 66 | if (!IS_ERR(inode) && (type & CODA_NOCACHE)) |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 67 | coda_flag_inode(inode, C_VATTR | C_PURGE); |
| 68 | |
Al Viro | f4947fb | 2012-01-10 11:11:49 -0500 | [diff] [blame] | 69 | if (inode == ERR_PTR(-ENOENT)) |
| 70 | inode = NULL; |
| 71 | |
Jan Harkes | ed36f72 | 2007-07-19 01:48:49 -0700 | [diff] [blame] | 72 | return d_splice_alias(inode, entry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | } |
| 74 | |
| 75 | |
Christian Brauner | 4609e1f | 2023-01-13 12:49:22 +0100 | [diff] [blame] | 76 | int coda_permission(struct mnt_idmap *idmap, struct inode *inode, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 77 | int mask) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 79 | int error; |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 80 | |
Al Viro | 10556cb2 | 2011-06-20 19:28:19 -0400 | [diff] [blame] | 81 | if (mask & MAY_NOT_BLOCK) |
Nick Piggin | b74c79e | 2011-01-07 17:49:58 +1100 | [diff] [blame] | 82 | return -ECHILD; |
| 83 | |
Al Viro | e6305c4 | 2008-07-15 21:03:57 -0400 | [diff] [blame] | 84 | mask &= MAY_READ | MAY_WRITE | MAY_EXEC; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
| 86 | if (!mask) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 87 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Miklos Szeredi | f696a36 | 2008-07-31 13:41:58 +0200 | [diff] [blame] | 89 | if ((mask & MAY_EXEC) && !execute_ok(inode)) |
| 90 | return -EACCES; |
| 91 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 92 | if (coda_cache_check(inode, mask)) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 93 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 95 | error = venus_access(inode->i_sb, coda_i2f(inode), mask); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
| 97 | if (!error) |
| 98 | coda_cache_enter(inode, mask); |
| 99 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 100 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | } |
| 102 | |
| 103 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 104 | static inline void coda_dir_update_mtime(struct inode *dir) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
| 106 | #ifdef REQUERY_VENUS_FOR_MTIME |
| 107 | /* invalidate the directory cnode's attributes so we refetch the |
| 108 | * attributes from venus next time the inode is referenced */ |
| 109 | coda_flag_inode(dir, C_VATTR); |
| 110 | #else |
| 111 | /* optimistically we can also act as if our nose bleeds. The |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 112 | * granularity of the mtime is coarse anyways so we might actually be |
| 113 | * right most of the time. Note: we only do this for directories. */ |
Jeff Layton | 581a4d0 | 2023-10-04 14:52:10 -0400 | [diff] [blame] | 114 | inode_set_mtime_to_ts(dir, inode_set_ctime_current(dir)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | #endif |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 116 | } |
| 117 | |
| 118 | /* we have to wrap inc_nlink/drop_nlink because sometimes userspace uses a |
| 119 | * trick to fool GNU find's optimizations. If we can't be sure of the link |
| 120 | * (because of volume mount points) we set i_nlink to 1 which forces find |
| 121 | * to consider every child as a possible directory. We should also never |
| 122 | * see an increment or decrement for deleted directories where i_nlink == 0 */ |
| 123 | static inline void coda_dir_inc_nlink(struct inode *dir) |
| 124 | { |
| 125 | if (dir->i_nlink >= 2) |
| 126 | inc_nlink(dir); |
| 127 | } |
| 128 | |
| 129 | static inline void coda_dir_drop_nlink(struct inode *dir) |
| 130 | { |
| 131 | if (dir->i_nlink > 2) |
| 132 | drop_nlink(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | } |
| 134 | |
| 135 | /* creation routines: create, mknod, mkdir, link, symlink */ |
Christian Brauner | 6c960e6 | 2023-01-13 12:49:13 +0100 | [diff] [blame] | 136 | static int coda_create(struct mnt_idmap *idmap, struct inode *dir, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 137 | struct dentry *de, umode_t mode, bool excl) |
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; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | const char *name=de->d_name.name; |
| 141 | int length=de->d_name.len; |
| 142 | struct inode *inode; |
| 143 | struct CodaFid newfid; |
| 144 | struct coda_vattr attrs; |
| 145 | |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 146 | if (is_root_inode(dir) && coda_iscontrol(name, length)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
| 149 | error = venus_create(dir->i_sb, coda_i2f(dir), name, length, |
| 150 | 0, mode, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 151 | if (error) |
| 152 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 155 | if (IS_ERR(inode)) { |
| 156 | error = PTR_ERR(inode); |
| 157 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | } |
| 159 | |
| 160 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 161 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 162 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 163 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 164 | err_out: |
| 165 | d_drop(de); |
| 166 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Christian Brauner | c54bd91 | 2023-01-13 12:49:15 +0100 | [diff] [blame] | 169 | static int coda_mkdir(struct mnt_idmap *idmap, struct inode *dir, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 170 | struct dentry *de, umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | { |
| 172 | struct inode *inode; |
| 173 | struct coda_vattr attrs; |
| 174 | const char *name = de->d_name.name; |
| 175 | int len = de->d_name.len; |
| 176 | int error; |
| 177 | struct CodaFid newfid; |
| 178 | |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 179 | if (is_root_inode(dir) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | |
| 182 | attrs.va_mode = mode; |
| 183 | error = venus_mkdir(dir->i_sb, coda_i2f(dir), |
| 184 | name, len, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 185 | if (error) |
| 186 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | |
| 188 | inode = coda_iget(dir->i_sb, &newfid, &attrs); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 189 | if (IS_ERR(inode)) { |
| 190 | error = PTR_ERR(inode); |
| 191 | goto err_out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 193 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | /* invalidate the directory cnode's attributes */ |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 195 | coda_dir_inc_nlink(dir); |
| 196 | coda_dir_update_mtime(dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | d_instantiate(de, inode); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 198 | return 0; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 199 | err_out: |
| 200 | d_drop(de); |
| 201 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | } |
| 203 | |
| 204 | /* try to make de an entry in dir_inodde linked to source_de */ |
| 205 | static int coda_link(struct dentry *source_de, struct inode *dir_inode, |
| 206 | struct dentry *de) |
| 207 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 208 | struct inode *inode = d_inode(source_de); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | const char * name = de->d_name.name; |
| 210 | int len = de->d_name.len; |
| 211 | int error; |
| 212 | |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 213 | if (is_root_inode(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 215 | |
| 216 | error = venus_link(dir_inode->i_sb, coda_i2f(inode), |
| 217 | coda_i2f(dir_inode), (const char *)name, len); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 218 | if (error) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | d_drop(de); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 220 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 223 | coda_dir_update_mtime(dir_inode); |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 224 | ihold(inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | d_instantiate(de, inode); |
Dave Hansen | d8c76e6 | 2006-09-30 23:29:04 -0700 | [diff] [blame] | 226 | inc_nlink(inode); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 227 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | } |
| 229 | |
| 230 | |
Christian Brauner | 7a77db9 | 2023-01-13 12:49:14 +0100 | [diff] [blame] | 231 | static int coda_symlink(struct mnt_idmap *idmap, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 232 | struct inode *dir_inode, struct dentry *de, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | const char *symname) |
| 234 | { |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 235 | const char *name = de->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | int len = de->d_name.len; |
| 237 | int symlen; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 238 | int error; |
Jan Harkes | 3cf01f2 | 2007-07-19 01:48:51 -0700 | [diff] [blame] | 239 | |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 240 | if (is_root_inode(dir_inode) && coda_iscontrol(name, len)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | return -EPERM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
| 243 | symlen = strlen(symname); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 244 | if (symlen > CODA_MAXPATHLEN) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 245 | return -ENAMETOOLONG; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | |
| 247 | /* |
| 248 | * This entry is now negative. Since we do not create |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 249 | * an inode for the entry we have to drop it. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | */ |
| 251 | d_drop(de); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 252 | 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] | 253 | symname, symlen); |
| 254 | |
| 255 | /* mtime is no good anymore */ |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 256 | if (!error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 257 | coda_dir_update_mtime(dir_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 259 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | } |
| 261 | |
| 262 | /* destruction routines: unlink, rmdir */ |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 263 | static int coda_unlink(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | { |
| 265 | int error; |
| 266 | const char *name = de->d_name.name; |
| 267 | int len = de->d_name.len; |
| 268 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 269 | error = venus_remove(dir->i_sb, coda_i2f(dir), name, len); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 270 | if (error) |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 271 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 272 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 273 | coda_dir_update_mtime(dir); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 274 | drop_nlink(d_inode(de)); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 275 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | } |
| 277 | |
Harvey Harrison | 9fe76c7 | 2008-04-29 00:58:44 -0700 | [diff] [blame] | 278 | static int coda_rmdir(struct inode *dir, struct dentry *de) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 279 | { |
| 280 | const char *name = de->d_name.name; |
| 281 | int len = de->d_name.len; |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 282 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 283 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 284 | error = venus_rmdir(dir->i_sb, coda_i2f(dir), name, len); |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 285 | if (!error) { |
| 286 | /* VFS may delete the child */ |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 287 | if (d_really_is_positive(de)) |
| 288 | clear_nlink(d_inode(de)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 290 | /* fix the link count of the parent */ |
| 291 | coda_dir_drop_nlink(dir); |
| 292 | coda_dir_update_mtime(dir); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 293 | } |
Jan Harkes | 8c6d215 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 294 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | } |
| 296 | |
| 297 | /* rename */ |
Christian Brauner | e18275a | 2023-01-13 12:49:17 +0100 | [diff] [blame] | 298 | static int coda_rename(struct mnt_idmap *idmap, struct inode *old_dir, |
Christian Brauner | 549c729 | 2021-01-21 14:19:43 +0100 | [diff] [blame] | 299 | struct dentry *old_dentry, struct inode *new_dir, |
| 300 | struct dentry *new_dentry, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 302 | const char *old_name = old_dentry->d_name.name; |
| 303 | const char *new_name = new_dentry->d_name.name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 304 | int old_length = old_dentry->d_name.len; |
| 305 | int new_length = new_dentry->d_name.len; |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 306 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | |
Miklos Szeredi | 1cd66c9 | 2016-09-27 11:03:58 +0200 | [diff] [blame] | 308 | if (flags) |
| 309 | return -EINVAL; |
| 310 | |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 311 | error = venus_rename(old_dir->i_sb, coda_i2f(old_dir), |
| 312 | coda_i2f(new_dir), old_length, new_length, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | (const char *) old_name, (const char *)new_name); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 314 | if (!error) { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 315 | if (d_really_is_positive(new_dentry)) { |
David Howells | e36cb0b | 2015-01-29 12:02:35 +0000 | [diff] [blame] | 316 | if (d_is_dir(new_dentry)) { |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 317 | coda_dir_drop_nlink(old_dir); |
| 318 | coda_dir_inc_nlink(new_dir); |
| 319 | } |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 320 | coda_flag_inode(d_inode(new_dentry), C_VATTR); |
Jan Harkes | d728900 | 2007-07-19 01:48:43 -0700 | [diff] [blame] | 321 | } |
Jan Harkes | b2e3622 | 2021-11-08 18:34:42 -0800 | [diff] [blame] | 322 | coda_dir_update_mtime(old_dir); |
| 323 | coda_dir_update_mtime(new_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | return error; |
| 326 | } |
| 327 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | static inline unsigned int CDT2DT(unsigned char cdt) |
| 329 | { |
| 330 | unsigned int dt; |
| 331 | |
| 332 | switch(cdt) { |
| 333 | case CDT_UNKNOWN: dt = DT_UNKNOWN; break; |
| 334 | case CDT_FIFO: dt = DT_FIFO; break; |
| 335 | case CDT_CHR: dt = DT_CHR; break; |
| 336 | case CDT_DIR: dt = DT_DIR; break; |
| 337 | case CDT_BLK: dt = DT_BLK; break; |
| 338 | case CDT_REG: dt = DT_REG; break; |
| 339 | case CDT_LNK: dt = DT_LNK; break; |
| 340 | case CDT_SOCK: dt = DT_SOCK; break; |
| 341 | case CDT_WHT: dt = DT_WHT; break; |
| 342 | default: dt = DT_UNKNOWN; break; |
| 343 | } |
| 344 | return dt; |
| 345 | } |
| 346 | |
| 347 | /* support routines */ |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 348 | 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] | 349 | { |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 350 | struct coda_file_info *cfi; |
| 351 | struct coda_inode_info *cii; |
| 352 | struct file *host_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 353 | struct venus_dirent *vdir; |
Al Viro | ee60498 | 2011-07-16 17:06:30 -0400 | [diff] [blame] | 354 | unsigned long vdir_size = offsetof(struct venus_dirent, d_name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | unsigned int type; |
| 356 | struct qstr name; |
| 357 | ino_t ino; |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 358 | int ret; |
| 359 | |
Fabian Frederick | 5bb4481 | 2019-07-16 16:29:09 -0700 | [diff] [blame] | 360 | cfi = coda_ftoc(coda_file); |
Jan Harkes | 9787525 | 2007-07-19 01:48:47 -0700 | [diff] [blame] | 361 | host_file = cfi->cfi_container; |
| 362 | |
Al Viro | 93fe74b | 2014-12-11 13:19:03 -0500 | [diff] [blame] | 363 | cii = ITOC(file_inode(coda_file)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 365 | vdir = kmalloc(sizeof(*vdir), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 366 | if (!vdir) return -ENOMEM; |
| 367 | |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 368 | if (!dir_emit_dots(coda_file, ctx)) |
| 369 | goto out; |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | while (1) { |
Christoph Hellwig | bdd1d2d | 2017-09-01 17:39:13 +0200 | [diff] [blame] | 372 | loff_t pos = ctx->pos - 2; |
| 373 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 374 | /* read entries from the directory file */ |
Christoph Hellwig | bdd1d2d | 2017-09-01 17:39:13 +0200 | [diff] [blame] | 375 | ret = kernel_read(host_file, vdir, sizeof(*vdir), &pos); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 376 | if (ret < 0) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 377 | pr_err("%s: read dir %s failed %d\n", |
| 378 | __func__, coda_f2s(&cii->c_fid), ret); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | break; |
| 380 | } |
| 381 | if (ret == 0) break; /* end of directory file reached */ |
| 382 | |
| 383 | /* catch truncated reads */ |
| 384 | if (ret < vdir_size || ret < vdir_size + vdir->d_namlen) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 385 | pr_err("%s: short read on %s\n", |
| 386 | __func__, coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 387 | ret = -EBADF; |
| 388 | break; |
| 389 | } |
| 390 | /* validate whether the directory file actually makes sense */ |
| 391 | if (vdir->d_reclen < vdir_size + vdir->d_namlen) { |
Fabian Frederick | 6d6bd94 | 2014-06-06 14:36:20 -0700 | [diff] [blame] | 392 | pr_err("%s: invalid dir %s\n", |
| 393 | __func__, coda_f2s(&cii->c_fid)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | ret = -EBADF; |
| 395 | break; |
| 396 | } |
| 397 | |
| 398 | name.len = vdir->d_namlen; |
| 399 | name.name = vdir->d_name; |
| 400 | |
| 401 | /* Make sure we skip '.' and '..', we already got those */ |
| 402 | if (name.name[0] == '.' && (name.len == 1 || |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 403 | (name.name[1] == '.' && name.len == 2))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | vdir->d_fileno = name.len = 0; |
| 405 | |
| 406 | /* skip null entries */ |
| 407 | if (vdir->d_fileno && name.len) { |
Al Viro | 6b5e122 | 2013-06-19 13:21:03 +0400 | [diff] [blame] | 408 | ino = vdir->d_fileno; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | type = CDT2DT(vdir->d_type); |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 410 | if (!dir_emit(ctx, name.name, name.len, ino, type)) |
| 411 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | /* we'll always have progress because d_reclen is unsigned and |
| 414 | * we've already established it is non-zero. */ |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 415 | ctx->pos += vdir->d_reclen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 416 | } |
Al Viro | 5f47c7e | 2007-07-20 00:23:31 +0100 | [diff] [blame] | 417 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | kfree(vdir); |
Al Viro | e924f251 | 2013-05-22 21:15:30 -0400 | [diff] [blame] | 419 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | } |
| 421 | |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 422 | /* file operations for directories */ |
| 423 | static int coda_readdir(struct file *coda_file, struct dir_context *ctx) |
| 424 | { |
| 425 | struct coda_file_info *cfi; |
| 426 | struct file *host_file; |
| 427 | int ret; |
| 428 | |
Fabian Frederick | 5bb4481 | 2019-07-16 16:29:09 -0700 | [diff] [blame] | 429 | cfi = coda_ftoc(coda_file); |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 430 | host_file = cfi->cfi_container; |
| 431 | |
Linus Torvalds | 3e32715 | 2023-08-05 12:25:01 -0700 | [diff] [blame] | 432 | if (host_file->f_op->iterate_shared) { |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 433 | struct inode *host_inode = file_inode(host_file); |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 434 | ret = -ENOENT; |
| 435 | if (!IS_DEADDIR(host_inode)) { |
Linus Torvalds | 3e32715 | 2023-08-05 12:25:01 -0700 | [diff] [blame] | 436 | inode_lock_shared(host_inode); |
| 437 | ret = host_file->f_op->iterate_shared(host_file, ctx); |
| 438 | file_accessed(host_file); |
| 439 | inode_unlock_shared(host_inode); |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 440 | } |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 441 | return ret; |
| 442 | } |
| 443 | /* Venus: we must read Venus dirents from a file */ |
| 444 | return coda_venus_readdir(coda_file, ctx); |
| 445 | } |
| 446 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 447 | /* called when a cache lookup succeeds */ |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 448 | static int coda_dentry_revalidate(struct dentry *de, unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 450 | struct inode *inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 451 | struct coda_inode_info *cii; |
| 452 | |
Al Viro | 0b728e1 | 2012-06-10 16:03:43 -0400 | [diff] [blame] | 453 | if (flags & LOOKUP_RCU) |
Nick Piggin | 34286d6 | 2011-01-07 17:49:57 +1100 | [diff] [blame] | 454 | return -ECHILD; |
| 455 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 456 | inode = d_inode(de); |
Al Viro | a740022 | 2014-10-21 15:20:42 -0400 | [diff] [blame] | 457 | if (!inode || is_root_inode(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | goto out; |
| 459 | if (is_bad_inode(inode)) |
| 460 | goto bad; |
| 461 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 462 | cii = ITOC(d_inode(de)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 463 | if (!(cii->c_flags & (C_PURGE | C_FLUSH))) |
| 464 | goto out; |
| 465 | |
| 466 | shrink_dcache_parent(de); |
| 467 | |
| 468 | /* propagate for a flush */ |
| 469 | if (cii->c_flags & C_FLUSH) |
| 470 | coda_flag_inode_children(inode, C_FLUSH); |
| 471 | |
Al Viro | 84d08fa | 2013-07-05 18:59:33 +0400 | [diff] [blame] | 472 | if (d_count(de) > 1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | /* pretend it's valid, but don't change the flags */ |
| 474 | goto out; |
| 475 | |
| 476 | /* clear the flags. */ |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 477 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 478 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 479 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | bad: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | return 0; |
| 482 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 483 | return 1; |
| 484 | } |
| 485 | |
| 486 | /* |
| 487 | * This is the callback from dput() when d_count is going to 0. |
| 488 | * We use this to unhash dentries with bad inodes. |
| 489 | */ |
Nick Piggin | fe15ce4 | 2011-01-07 17:49:23 +1100 | [diff] [blame] | 490 | static int coda_dentry_delete(const struct dentry * dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | { |
Jan Harkes | 18319cb | 2021-11-08 18:34:30 -0800 | [diff] [blame] | 492 | struct inode *inode; |
| 493 | struct coda_inode_info *cii; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 495 | if (d_really_is_negative(dentry)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | return 0; |
| 497 | |
Jan Harkes | 18319cb | 2021-11-08 18:34:30 -0800 | [diff] [blame] | 498 | inode = d_inode(dentry); |
| 499 | if (!inode || is_bad_inode(inode)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | return 1; |
Jan Harkes | 18319cb | 2021-11-08 18:34:30 -0800 | [diff] [blame] | 501 | |
| 502 | cii = ITOC(inode); |
| 503 | if (cii->c_flags & C_PURGE) |
| 504 | return 1; |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | return 0; |
| 507 | } |
| 508 | |
| 509 | |
| 510 | |
| 511 | /* |
| 512 | * This is called when we want to check if the inode has |
| 513 | * changed on the server. Coda makes this easy since the |
| 514 | * cache manager Venus issues a downcall to the kernel when this |
| 515 | * happens |
| 516 | */ |
Al Viro | 11d100d | 2013-10-04 18:17:02 -0400 | [diff] [blame] | 517 | int coda_revalidate_inode(struct inode *inode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 518 | { |
| 519 | struct coda_vattr attr; |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 520 | int error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | int old_mode; |
| 522 | ino_t old_ino; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 523 | struct coda_inode_info *cii = ITOC(inode); |
| 524 | |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 525 | if (!cii->c_flags) |
| 526 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 527 | |
| 528 | if (cii->c_flags & (C_VATTR | C_PURGE | C_FLUSH)) { |
| 529 | error = venus_getattr(inode->i_sb, &(cii->c_fid), &attr); |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 530 | if (error) |
| 531 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | |
| 533 | /* this inode may be lost if: |
| 534 | - it's ino changed |
| 535 | - type changes must be permitted for repair and |
| 536 | missing mount points. |
| 537 | */ |
| 538 | old_mode = inode->i_mode; |
| 539 | old_ino = inode->i_ino; |
| 540 | coda_vattr_to_iattr(inode, &attr); |
| 541 | |
| 542 | if ((old_mode & S_IFMT) != (inode->i_mode & S_IFMT)) { |
Fabian Frederick | f38cfb25 | 2014-06-06 14:36:19 -0700 | [diff] [blame] | 543 | pr_warn("inode %ld, fid %s changed type!\n", |
Fabian Frederick | d9b4b31 | 2014-06-06 14:36:18 -0700 | [diff] [blame] | 544 | inode->i_ino, coda_f2s(&(cii->c_fid))); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | } |
| 546 | |
| 547 | /* the following can happen when a local fid is replaced |
| 548 | with a global one, here we lose and declare the inode bad */ |
| 549 | if (inode->i_ino != old_ino) |
Yoshihisa Abe | f7cc02b8 | 2010-10-25 02:03:45 -0400 | [diff] [blame] | 550 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
| 552 | coda_flag_inode_children(inode, C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 553 | |
| 554 | spin_lock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 555 | cii->c_flags &= ~(C_VATTR | C_PURGE | C_FLUSH); |
Yoshihisa Abe | b5ce1d8 | 2010-10-25 02:03:44 -0400 | [diff] [blame] | 556 | spin_unlock(&cii->c_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | } |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 560 | |
| 561 | const struct dentry_operations coda_dentry_operations = { |
| 562 | .d_revalidate = coda_dentry_revalidate, |
| 563 | .d_delete = coda_dentry_delete, |
| 564 | }; |
| 565 | |
| 566 | const struct inode_operations coda_dir_inode_operations = { |
| 567 | .create = coda_create, |
| 568 | .lookup = coda_lookup, |
| 569 | .link = coda_link, |
| 570 | .unlink = coda_unlink, |
| 571 | .symlink = coda_symlink, |
| 572 | .mkdir = coda_mkdir, |
| 573 | .rmdir = coda_rmdir, |
| 574 | .mknod = CODA_EIO_ERROR, |
| 575 | .rename = coda_rename, |
| 576 | .permission = coda_permission, |
| 577 | .getattr = coda_getattr, |
| 578 | .setattr = coda_setattr, |
| 579 | }; |
| 580 | |
Linus Torvalds | 3e32715 | 2023-08-05 12:25:01 -0700 | [diff] [blame] | 581 | WRAP_DIR_ITER(coda_readdir) // FIXME! |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 582 | const struct file_operations coda_dir_operations = { |
| 583 | .llseek = generic_file_llseek, |
| 584 | .read = generic_read_dir, |
Linus Torvalds | 3e32715 | 2023-08-05 12:25:01 -0700 | [diff] [blame] | 585 | .iterate_shared = shared_coda_readdir, |
Fabian Frederick | b625032 | 2015-02-17 13:45:25 -0800 | [diff] [blame] | 586 | .open = coda_open, |
| 587 | .release = coda_release, |
| 588 | .fsync = coda_fsync, |
| 589 | }; |