diff options
| -rw-r--r-- | fs/hfsplus/btree.c | 4 | ||||
| -rw-r--r-- | fs/hfsplus/dir.c | 2 | ||||
| -rw-r--r-- | fs/hfsplus/hfsplus_fs.h | 4 | ||||
| -rw-r--r-- | fs/hfsplus/inode.c | 5 | ||||
| -rw-r--r-- | fs/hfsplus/super.c | 1 | ||||
| -rw-r--r-- | fs/hfsplus/unicode.c | 123 |
6 files changed, 138 insertions, 1 deletions
diff --git a/fs/hfsplus/btree.c b/fs/hfsplus/btree.c index 90ebab753d30..050d29c0a5b5 100644 --- a/fs/hfsplus/btree.c +++ b/fs/hfsplus/btree.c @@ -62,8 +62,10 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id) if ((HFSPLUS_SB(sb).flags & HFSPLUS_SB_HFSX) && (head->key_type == HFSPLUS_KEY_BINARY)) tree->keycmp = hfsplus_cat_bin_cmp_key; - else + else { tree->keycmp = hfsplus_cat_case_cmp_key; + HFSPLUS_SB(sb).flags |= HFSPLUS_SB_CASEFOLD; + } } else { printk(KERN_ERR "hfs: unknown B*Tree requested\n"); goto fail_page; diff --git a/fs/hfsplus/dir.c b/fs/hfsplus/dir.c index 80b5682a2273..1955ee61251c 100644 --- a/fs/hfsplus/dir.c +++ b/fs/hfsplus/dir.c @@ -36,6 +36,8 @@ static struct dentry *hfsplus_lookup(struct inode *dir, struct dentry *dentry, u16 type; sb = dir->i_sb; + + dentry->d_op = &hfsplus_dentry_operations; dentry->d_fsdata = NULL; hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd); hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, &dentry->d_name); diff --git a/fs/hfsplus/hfsplus_fs.h b/fs/hfsplus/hfsplus_fs.h index 3915635b4470..d9f5eda6d039 100644 --- a/fs/hfsplus/hfsplus_fs.h +++ b/fs/hfsplus/hfsplus_fs.h @@ -150,6 +150,7 @@ struct hfsplus_sb_info { #define HFSPLUS_SB_NODECOMPOSE 0x0002 #define HFSPLUS_SB_FORCE 0x0004 #define HFSPLUS_SB_HFSX 0x0008 +#define HFSPLUS_SB_CASEFOLD 0x0010 struct hfsplus_inode_info { @@ -321,6 +322,7 @@ void hfsplus_file_truncate(struct inode *); /* inode.c */ extern const struct address_space_operations hfsplus_aops; extern const struct address_space_operations hfsplus_btree_aops; +extern struct dentry_operations hfsplus_dentry_operations; void hfsplus_inode_read_fork(struct inode *, struct hfsplus_fork_raw *); void hfsplus_inode_write_fork(struct inode *, struct hfsplus_fork_raw *); @@ -353,6 +355,8 @@ int hfsplus_strcasecmp(const struct hfsplus_unistr *, const struct hfsplus_unist int hfsplus_strcmp(const struct hfsplus_unistr *, const struct hfsplus_unistr *); int hfsplus_uni2asc(struct super_block *, const struct hfsplus_unistr *, char *, int *); int hfsplus_asc2uni(struct super_block *, struct hfsplus_unistr *, const char *, int); +int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str); +int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2); /* wrapper.c */ int hfsplus_read_wrapper(struct super_block *); diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c index 409ce5429c91..6f7c662174db 100644 --- a/fs/hfsplus/inode.c +++ b/fs/hfsplus/inode.c @@ -131,6 +131,11 @@ const struct address_space_operations hfsplus_aops = { .writepages = hfsplus_writepages, }; +struct dentry_operations hfsplus_dentry_operations = { + .d_hash = hfsplus_hash_dentry, + .d_compare = hfsplus_compare_dentry, +}; + static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd) { diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c index 42570c95ad62..6d87a2a9534d 100644 --- a/fs/hfsplus/super.c +++ b/fs/hfsplus/super.c @@ -380,6 +380,7 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent) iput(root); goto cleanup; } + sb->s_root->d_op = &hfsplus_dentry_operations; str.len = sizeof(HFSP_HIDDENDIR_NAME) - 1; str.name = HFSP_HIDDENDIR_NAME; diff --git a/fs/hfsplus/unicode.c b/fs/hfsplus/unicode.c index 5df0052b2775..9e10f9444b64 100644 --- a/fs/hfsplus/unicode.c +++ b/fs/hfsplus/unicode.c @@ -314,3 +314,126 @@ int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr, return -ENAMETOOLONG; return 0; } + +/* + * Hash a string to an integer as appropriate for the HFS+ filesystem. + * Composed unicode characters are decomposed and case-folding is performed + * if the appropriate bits are (un)set on the superblock. + */ +int hfsplus_hash_dentry(struct dentry *dentry, struct qstr *str) +{ + struct super_block *sb = dentry->d_sb; + const char *astr; + const u16 *dstr; + int casefold, decompose, size, dsize, len; + unsigned long hash; + wchar_t c; + u16 c2; + + casefold = (HFSPLUS_SB(sb).flags & HFSPLUS_SB_CASEFOLD); + decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE); + hash = init_name_hash(); + astr = str->name; + len = str->len; + while (len > 0) { + size = asc2unichar(sb, astr, len, &c); + astr += size; + len -= size; + + if (decompose && (dstr = decompose_unichar(c, &dsize))) { + do { + c2 = *dstr++; + if (!casefold || (c2 = case_fold(c2))) + hash = partial_name_hash(c2, hash); + } while (--dsize > 0); + } else { + c2 = c; + if (!casefold || (c2 = case_fold(c2))) + hash = partial_name_hash(c2, hash); + } + } + str->hash = end_name_hash(hash); + + return 0; +} + +/* + * Compare strings with HFS+ filename ordering. + * Composed unicode characters are decomposed and case-folding is performed + * if the appropriate bits are (un)set on the superblock. + */ +int hfsplus_compare_dentry(struct dentry *dentry, struct qstr *s1, struct qstr *s2) +{ + struct super_block *sb = dentry->d_sb; + int casefold, decompose, size; + int dsize1, dsize2, len1, len2; + const u16 *dstr1, *dstr2; + const char *astr1, *astr2; + u16 c1, c2; + wchar_t c; + + casefold = (HFSPLUS_SB(sb).flags & HFSPLUS_SB_CASEFOLD); + decompose = !(HFSPLUS_SB(sb).flags & HFSPLUS_SB_NODECOMPOSE); + astr1 = s1->name; + len1 = s1->len; + astr2 = s2->name; + len2 = s2->len; + dsize1 = dsize2 = 0; + dstr1 = dstr2 = NULL; + + while (len1 > 0 && len2 > 0) { + if (!dsize1) { + size = asc2unichar(sb, astr1, len1, &c); + astr1 += size; + len1 -= size; + + if (!decompose || !(dstr1 = decompose_unichar(c, &dsize1))) { + c1 = c; + dstr1 = &c1; + dsize1 = 1; + } + } + + if (!dsize2) { + size = asc2unichar(sb, astr2, len2, &c); + astr2 += size; + len2 -= size; + + if (!decompose || !(dstr2 = decompose_unichar(c, &dsize2))) { + c2 = c; + dstr2 = &c2; + dsize2 = 1; + } + } + + c1 = *dstr1; + c2 = *dstr2; + if (casefold) { + if (!(c1 = case_fold(c1))) { + dstr1++; + dsize1--; + continue; + } + if (!(c2 = case_fold(c2))) { + dstr2++; + dsize2--; + continue; + } + } + if (c1 < c2) + return -1; + else if (c1 > c2) + return 1; + + dstr1++; + dsize1--; + dstr2++; + dsize2--; + } + + if (len1 < len2) + return -1; + if (len1 > len2) + return 1; + return 0; +} |