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authorSteve French <sfrench@us.ibm.com>2005-08-22 20:09:43 -0700
committerSteve French <sfrench@us.ibm.com>2005-08-22 20:09:43 -0700
commitb92327fe6b25d60004b79df9e3c19091c03118ba (patch)
tree064479872cf0cc83d08f9c719edfd9769b01b9a3 /fs/cifs/dir.c
parenta5a2b489bae8f66559a531df99a26eb16b42299e (diff)
[CIFS] Finish up of case-insensitive dentry handling for cifs. This
will eventually (or should eventually) be common code for jfs, smbfs, etc. but in the meantime is small enough and necessary when mounting case insensitive to Windows (nocase). Signed-off-by: Shaggy (shaggy@austin.ibm.com) Signed-off-by: Steve French (sfrench@us.ibm.com)
Diffstat (limited to 'fs/cifs/dir.c')
-rw-r--r--fs/cifs/dir.c54
1 files changed, 51 insertions, 3 deletions
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index c619d45060c..5311c50734b 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -230,7 +230,10 @@ cifs_create(struct inode *inode, struct dentry *direntry, int mode,
("Create worked but get_inode_info failed rc = %d",
rc));
} else {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_instantiate(direntry, newinode);
}
if((nd->flags & LOOKUP_OPEN) == FALSE) {
@@ -322,7 +325,10 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, int mode, dev_t dev
if(!rc) {
rc = cifs_get_inode_info_unix(&newinode, full_path,
inode->i_sb,xid);
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
if(rc == 0)
d_instantiate(direntry, newinode);
}
@@ -418,7 +424,10 @@ cifs_lookup(struct inode *parent_dir_inode, struct dentry *direntry, struct name
parent_dir_inode->i_sb,xid);
if ((rc == 0) && (newInode != NULL)) {
- direntry->d_op = &cifs_dentry_ops;
+ if (pTcon->nocase)
+ direntry->d_op = &cifs_ci_dentry_ops;
+ else
+ direntry->d_op = &cifs_dentry_ops;
d_add(direntry, newInode);
/* since paths are not looked up by component - the parent directories are presumed to be good here */
@@ -477,3 +486,42 @@ struct dentry_operations cifs_dentry_ops = {
/* d_delete: cifs_d_delete, *//* not needed except for debugging */
/* no need for d_hash, d_compare, d_release, d_iput ... yet. BB confirm this BB */
};
+
+static int cifs_ci_hash(struct dentry *dentry, struct qstr *q)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+ unsigned long hash;
+ int i;
+
+ hash = init_name_hash();
+ for (i = 0; i < q->len; i++)
+ hash = partial_name_hash(nls_tolower(codepage, q->name[i]),
+ hash);
+ q->hash = end_name_hash(hash);
+
+ return 0;
+}
+
+static int cifs_ci_compare(struct dentry *dentry, struct qstr *a,
+ struct qstr *b)
+{
+ struct nls_table *codepage = CIFS_SB(dentry->d_inode->i_sb)->local_nls;
+
+ if ((a->len == b->len) &&
+ (nls_strnicmp(codepage, a->name, b->name, a->len) == 0)) {
+ /*
+ * To preserve case, don't let an existing negative dentry's
+ * case take precedence. If a is not a negative dentry, this
+ * should have no side effects
+ */
+ memcpy((unsigned char *)a->name, b->name, a->len);
+ return 0;
+ }
+ return 1;
+}
+
+struct dentry_operations cifs_ci_dentry_ops = {
+ .d_revalidate = cifs_d_revalidate,
+ .d_hash = cifs_ci_hash,
+ .d_compare = cifs_ci_compare,
+};