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-rw-r--r--fs/adfs/adfs.h4
-rw-r--r--fs/adfs/dir.c50
-rw-r--r--fs/adfs/dir_f.c56
-rw-r--r--fs/adfs/dir_fplus.c47
4 files changed, 75 insertions, 82 deletions
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index 5f1acee768f5..92cbc4b1d902 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -165,6 +165,10 @@ 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;
+int adfs_dir_copyfrom(void *dst, struct adfs_dir *dir, unsigned int offset,
+ size_t len);
+int adfs_dir_copyto(struct adfs_dir *dir, unsigned int offset, const void *src,
+ size_t len);
void adfs_dir_relse(struct adfs_dir *dir);
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,
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index 16a2639d3ca5..3c303074aa5e 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -14,6 +14,56 @@
*/
static DEFINE_RWLOCK(adfs_dir_lock);
+int adfs_dir_copyfrom(void *dst, struct adfs_dir *dir, unsigned int offset,
+ size_t len)
+{
+ struct super_block *sb = dir->sb;
+ unsigned int index, remain;
+
+ index = offset >> sb->s_blocksize_bits;
+ offset &= sb->s_blocksize - 1;
+ remain = sb->s_blocksize - offset;
+ if (index + (remain < len) >= dir->nr_buffers)
+ return -EINVAL;
+
+ if (remain < len) {
+ memcpy(dst, dir->bhs[index]->b_data + offset, remain);
+ dst += remain;
+ len -= remain;
+ index += 1;
+ offset = 0;
+ }
+
+ memcpy(dst, dir->bhs[index]->b_data + offset, len);
+
+ return 0;
+}
+
+int adfs_dir_copyto(struct adfs_dir *dir, unsigned int offset, const void *src,
+ size_t len)
+{
+ struct super_block *sb = dir->sb;
+ unsigned int index, remain;
+
+ index = offset >> sb->s_blocksize_bits;
+ offset &= sb->s_blocksize - 1;
+ remain = sb->s_blocksize - offset;
+ if (index + (remain < len) >= dir->nr_buffers)
+ return -EINVAL;
+
+ if (remain < len) {
+ memcpy(dir->bhs[index]->b_data + offset, src, remain);
+ src += remain;
+ len -= remain;
+ index += 1;
+ offset = 0;
+ }
+
+ memcpy(dir->bhs[index]->b_data + offset, src, len);
+
+ return 0;
+}
+
void adfs_dir_relse(struct adfs_dir *dir)
{
unsigned int i;
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 80ac261b9ec4..3c3b423577d2 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -224,24 +224,12 @@ adfs_obj2dir(struct adfs_direntry *de, struct object_info *obj)
static int
__adfs_dir_get(struct adfs_dir *dir, int pos, struct object_info *obj)
{
- struct super_block *sb = dir->sb;
struct adfs_direntry de;
- int thissize, buffer, offset;
-
- buffer = pos >> sb->s_blocksize_bits;
-
- if (buffer > dir->nr_buffers)
- return -EINVAL;
-
- offset = pos & (sb->s_blocksize - 1);
- thissize = sb->s_blocksize - offset;
- if (thissize > 26)
- thissize = 26;
+ int ret;
- memcpy(&de, dir->bh[buffer]->b_data + offset, thissize);
- if (thissize != 26)
- memcpy(((char *)&de) + thissize, dir->bh[buffer + 1]->b_data,
- 26 - thissize);
+ ret = adfs_dir_copyfrom(&de, dir, pos, 26);
+ if (ret)
+ return ret;
if (!de.dirobname[0])
return -ENOENT;
@@ -254,42 +242,16 @@ __adfs_dir_get(struct adfs_dir *dir, int pos, struct object_info *obj)
static int
__adfs_dir_put(struct adfs_dir *dir, int pos, struct object_info *obj)
{
- struct super_block *sb = dir->sb;
struct adfs_direntry de;
- int thissize, buffer, offset;
-
- buffer = pos >> sb->s_blocksize_bits;
-
- if (buffer > dir->nr_buffers)
- return -EINVAL;
-
- offset = pos & (sb->s_blocksize - 1);
- thissize = sb->s_blocksize - offset;
- if (thissize > 26)
- thissize = 26;
+ int ret;
- /*
- * Get the entry in total
- */
- memcpy(&de, dir->bh[buffer]->b_data + offset, thissize);
- if (thissize != 26)
- memcpy(((char *)&de) + thissize, dir->bh[buffer + 1]->b_data,
- 26 - thissize);
+ ret = adfs_dir_copyfrom(&de, dir, pos, 26);
+ if (ret)
+ return ret;
- /*
- * update it
- */
adfs_obj2dir(&de, obj);
- /*
- * Put the new entry back
- */
- memcpy(dir->bh[buffer]->b_data + offset, &de, thissize);
- if (thissize != 26)
- memcpy(dir->bh[buffer + 1]->b_data, ((char *)&de) + thissize,
- 26 - thissize);
-
- return 0;
+ return adfs_dir_copyto(dir, pos, &de, 26);
}
/*
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index 1196c8962feb..6a07c0dfcc93 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -112,34 +112,6 @@ adfs_fplus_setpos(struct adfs_dir *dir, unsigned int fpos)
return ret;
}
-static void
-dir_memcpy(struct adfs_dir *dir, unsigned int offset, void *to, int len)
-{
- struct super_block *sb = dir->sb;
- unsigned int buffer, partial, remainder;
-
- buffer = offset >> sb->s_blocksize_bits;
- offset &= sb->s_blocksize - 1;
-
- partial = sb->s_blocksize - offset;
-
- if (partial >= len)
- memcpy(to, dir->bhs[buffer]->b_data + offset, len);
- else {
- char *c = (char *)to;
-
- remainder = len - partial;
-
- memcpy(c,
- dir->bhs[buffer]->b_data + offset,
- partial);
-
- memcpy(c + partial,
- dir->bhs[buffer + 1]->b_data,
- remainder);
- }
-}
-
static int
adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
{
@@ -147,16 +119,19 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
(struct adfs_bigdirheader *) dir->bhs[0]->b_data;
struct adfs_bigdirentry bde;
unsigned int offset;
- int ret = -ENOENT;
+ int ret;
if (dir->pos >= le32_to_cpu(h->bigdirentries))
- goto out;
+ return -ENOENT;
offset = offsetof(struct adfs_bigdirheader, bigdirname);
offset += ((le32_to_cpu(h->bigdirnamelen) + 4) & ~3);
offset += dir->pos * sizeof(struct adfs_bigdirentry);
- dir_memcpy(dir, offset, &bde, sizeof(struct adfs_bigdirentry));
+ ret = adfs_dir_copyfrom(&bde, dir, offset,
+ sizeof(struct adfs_bigdirentry));
+ if (ret)
+ return ret;
obj->loadaddr = le32_to_cpu(bde.bigdirload);
obj->execaddr = le32_to_cpu(bde.bigdirexec);
@@ -170,13 +145,15 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
offset += le32_to_cpu(h->bigdirentries) * sizeof(struct adfs_bigdirentry);
offset += le32_to_cpu(bde.bigdirobnameptr);
- dir_memcpy(dir, offset, obj->name, obj->name_len);
+ ret = adfs_dir_copyfrom(obj->name, dir, offset, obj->name_len);
+ if (ret)
+ return ret;
+
adfs_object_fixup(dir, obj);
dir->pos += 1;
- ret = 0;
-out:
- return ret;
+
+ return 0;
}
const struct adfs_dir_ops adfs_fplus_dir_ops = {
generated by cgit (git 2.34.1) at 2024-05-05 03:18:24 +0000