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-rw-r--r--fs/adfs/adfs.h14
-rw-r--r--fs/adfs/dir.c137
-rw-r--r--fs/adfs/dir_f.c43
-rw-r--r--fs/adfs/dir_fplus.c24
4 files changed, 89 insertions, 129 deletions
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index c76db75f02aa..804c6a77c5db 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -113,19 +113,6 @@ struct object_info {
__u16 filetype;
};
-/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
-static inline int append_filetype_suffix(char *buf, __u16 filetype)
-{
- if (filetype == 0xffff) /* no explicit 12-bit file type was set */
- return 0;
-
- *buf++ = ',';
- *buf++ = hex_asc_lo(filetype >> 8);
- *buf++ = hex_asc_lo(filetype >> 4);
- *buf++ = hex_asc_lo(filetype >> 0);
- return 4;
-}
-
struct adfs_dir_ops {
int (*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
int (*setpos)(struct adfs_dir *dir, unsigned int fpos);
@@ -172,6 +159,7 @@ extern const struct dentry_operations adfs_dentry_operations;
extern const struct adfs_dir_ops adfs_f_dir_ops;
extern const struct adfs_dir_ops adfs_fplus_dir_ops;
+void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj);
extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
int wait);
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index e18eff854e1a..fe39310c1a0a 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -16,6 +16,50 @@
*/
static DEFINE_RWLOCK(adfs_dir_lock);
+void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj)
+{
+ unsigned int dots, i;
+
+ /*
+ * RISC OS allows the use of '/' in directory entry names, so we need
+ * to fix these up. '/' is typically used for FAT compatibility to
+ * represent '.', so do the same conversion here. In any case, '.'
+ * will never be in a RISC OS name since it is used as the pathname
+ * separator. Handle the case where we may generate a '.' or '..'
+ * name, replacing the first character with '^' (the RISC OS "parent
+ * directory" character.)
+ */
+ for (i = dots = 0; i < obj->name_len; i++)
+ if (obj->name[i] == '/') {
+ obj->name[i] = '.';
+ dots++;
+ }
+
+ if (obj->name_len <= 2 && dots == obj->name_len)
+ obj->name[0] = '^';
+
+ obj->filetype = -1;
+
+ /*
+ * object is a file and is filetyped and timestamped?
+ * RISC OS 12-bit filetype is stored in load_address[19:8]
+ */
+ if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
+ (0xfff00000 == (0xfff00000 & obj->loadaddr))) {
+ obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
+
+ /* optionally append the ,xyz hex filetype suffix */
+ if (ADFS_SB(dir->sb)->s_ftsuffix) {
+ __u16 filetype = obj->filetype;
+
+ obj->name[obj->name_len++] = ',';
+ obj->name[obj->name_len++] = hex_asc_lo(filetype >> 8);
+ obj->name[obj->name_len++] = hex_asc_lo(filetype >> 4);
+ obj->name[obj->name_len++] = hex_asc_lo(filetype >> 0);
+ }
+ }
+}
+
static int
adfs_readdir(struct file *file, struct dir_context *ctx)
{
@@ -100,37 +144,36 @@ out:
return ret;
}
-static int
-adfs_match(const struct qstr *name, struct object_info *obj)
+static unsigned char adfs_tolower(unsigned char c)
{
- int i;
-
- if (name->len != obj->name_len)
- return 0;
+ if (c >= 'A' && c <= 'Z')
+ c += 'a' - 'A';
+ return c;
+}
- for (i = 0; i < name->len; i++) {
- char c1, c2;
+static int __adfs_compare(const unsigned char *qstr, u32 qlen,
+ const char *str, u32 len)
+{
+ u32 i;
- c1 = name->name[i];
- c2 = obj->name[i];
+ if (qlen != len)
+ return 1;
- if (c1 >= 'A' && c1 <= 'Z')
- c1 += 'a' - 'A';
- if (c2 >= 'A' && c2 <= 'Z')
- c2 += 'a' - 'A';
+ for (i = 0; i < qlen; i++)
+ if (adfs_tolower(qstr[i]) != adfs_tolower(str[i]))
+ return 1;
- if (c1 != c2)
- return 0;
- }
- return 1;
+ return 0;
}
-static int
-adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct object_info *obj)
+static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr,
+ struct object_info *obj)
{
struct super_block *sb = inode->i_sb;
const struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
+ const unsigned char *name;
struct adfs_dir dir;
+ u32 name_len;
int ret;
ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
@@ -153,8 +196,10 @@ adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct obje
goto unlock_out;
ret = -ENOENT;
+ name = qstr->name;
+ name_len = qstr->len;
while (ops->getnext(&dir, obj) == 0) {
- if (adfs_match(name, obj)) {
+ if (!__adfs_compare(name, name_len, obj->name, obj->name_len)) {
ret = 0;
break;
}
@@ -179,30 +224,18 @@ const struct file_operations adfs_dir_operations = {
static int
adfs_hash(const struct dentry *parent, struct qstr *qstr)
{
- const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
const unsigned char *name;
unsigned long hash;
- int i;
+ u32 len;
- if (qstr->len < name_len)
- return 0;
+ if (qstr->len > ADFS_SB(parent->d_sb)->s_namelen)
+ return -ENAMETOOLONG;
- /*
- * Truncate the name in place, avoids
- * having to define a compare function.
- */
- qstr->len = i = name_len;
+ len = qstr->len;
name = qstr->name;
hash = init_name_hash(parent);
- while (i--) {
- char c;
-
- c = *name++;
- if (c >= 'A' && c <= 'Z')
- c += 'a' - 'A';
-
- hash = partial_name_hash(c, hash);
- }
+ while (len--)
+ hash = partial_name_hash(adfs_tolower(*name++), hash);
qstr->hash = end_name_hash(hash);
return 0;
@@ -212,30 +245,10 @@ adfs_hash(const struct dentry *parent, struct qstr *qstr)
* Compare two names, taking note of the name length
* requirements of the underlying filesystem.
*/
-static int
-adfs_compare(const struct dentry *dentry,
- unsigned int len, const char *str, const struct qstr *name)
+static int adfs_compare(const struct dentry *dentry, unsigned int len,
+ const char *str, const struct qstr *qstr)
{
- int i;
-
- if (len != name->len)
- return 1;
-
- for (i = 0; i < name->len; i++) {
- char a, b;
-
- a = str[i];
- b = name->name[i];
-
- if (a >= 'A' && a <= 'Z')
- a += 'a' - 'A';
- if (b >= 'A' && b <= 'Z')
- b += 'a' - 'A';
-
- if (a != b)
- return 1;
- }
- return 0;
+ return __adfs_compare(qstr->name, qstr->len, str, len);
}
const struct dentry_operations adfs_dentry_operations = {
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 382c9d7ad375..693f69ed3de3 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -47,21 +47,6 @@ static inline void adfs_writeval(unsigned char *p, int len, unsigned int val)
}
}
-static inline int adfs_readname(char *buf, char *ptr, int maxlen)
-{
- char *old_buf = buf;
-
- while ((unsigned char)*ptr >= ' ' && maxlen--) {
- if (*ptr == '/')
- *buf++ = '.';
- else
- *buf++ = *ptr;
- ptr++;
- }
-
- return buf - old_buf;
-}
-
#define ror13(v) ((v >> 13) | (v << 19))
#define dir_u8(idx) \
@@ -216,29 +201,23 @@ static inline void
adfs_dir2obj(struct adfs_dir *dir, struct object_info *obj,
struct adfs_direntry *de)
{
- obj->name_len = adfs_readname(obj->name, de->dirobname, ADFS_F_NAME_LEN);
+ unsigned int name_len;
+
+ for (name_len = 0; name_len < ADFS_F_NAME_LEN; name_len++) {
+ if (de->dirobname[name_len] < ' ')
+ break;
+
+ obj->name[name_len] = de->dirobname[name_len];
+ }
+
+ obj->name_len = name_len;
obj->file_id = adfs_readval(de->dirinddiscadd, 3);
obj->loadaddr = adfs_readval(de->dirload, 4);
obj->execaddr = adfs_readval(de->direxec, 4);
obj->size = adfs_readval(de->dirlen, 4);
obj->attr = de->newdiratts;
- obj->filetype = -1;
- /*
- * object is a file and is filetyped and timestamped?
- * RISC OS 12-bit filetype is stored in load_address[19:8]
- */
- if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
- (0xfff00000 == (0xfff00000 & obj->loadaddr))) {
- obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
-
- /* optionally append the ,xyz hex filetype suffix */
- if (ADFS_SB(dir->sb)->s_ftsuffix)
- obj->name_len +=
- append_filetype_suffix(
- &obj->name[obj->name_len],
- obj->filetype);
- }
+ adfs_object_fixup(dir, obj);
}
/*
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index c92cfb638c18..97b9f28f459b 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -169,7 +169,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
(struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data;
struct adfs_bigdirentry bde;
unsigned int offset;
- int i, ret = -ENOENT;
+ int ret = -ENOENT;
if (dir->pos >= le32_to_cpu(h->bigdirentries))
goto out;
@@ -193,27 +193,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
offset += le32_to_cpu(bde.bigdirobnameptr);
dir_memcpy(dir, offset, obj->name, obj->name_len);
- for (i = 0; i < obj->name_len; i++)
- if (obj->name[i] == '/')
- obj->name[i] = '.';
-
- obj->filetype = -1;
-
- /*
- * object is a file and is filetyped and timestamped?
- * RISC OS 12-bit filetype is stored in load_address[19:8]
- */
- if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
- (0xfff00000 == (0xfff00000 & obj->loadaddr))) {
- obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
-
- /* optionally append the ,xyz hex filetype suffix */
- if (ADFS_SB(dir->sb)->s_ftsuffix)
- obj->name_len +=
- append_filetype_suffix(
- &obj->name[obj->name_len],
- obj->filetype);
- }
+ adfs_object_fixup(dir, obj);
dir->pos += 1;
ret = 0;
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-15 14:30:43 +0300