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-rw-r--r--kernel/dir.c242
1 files changed, 174 insertions, 68 deletions
diff --git a/kernel/dir.c b/kernel/dir.c
index 92ddc55..065ac01 100644
--- a/kernel/dir.c
+++ b/kernel/dir.c
@@ -14,6 +14,15 @@
#include <linux/file.h>
#include <linux/slab.h>
+static struct inode_operations fuse_dir_inode_operations;
+static struct inode_operations fuse_file_inode_operations;
+static struct inode_operations fuse_symlink_inode_operations;
+static struct inode_operations fuse_special_inode_operations;
+
+static struct file_operations fuse_dir_operations;
+static struct file_operations fuse_file_operations;
+
+
static void change_attributes(struct inode *inode, struct fuse_attr *attr)
{
inode->i_mode = attr->mode;
@@ -28,18 +37,22 @@ static void change_attributes(struct inode *inode, struct fuse_attr *attr)
inode->i_ctime = attr->ctime;
}
-static void init_inode(struct inode *inode, struct fuse_attr *attr)
+void fuse_init_inode(struct inode *inode, struct fuse_attr *attr)
{
change_attributes(inode, attr);
- if(S_ISREG(inode->i_mode))
- fuse_file_init(inode);
- else if(S_ISDIR(inode->i_mode))
- fuse_dir_init(inode);
+ if(S_ISREG(inode->i_mode)) {
+ inode->i_op = &fuse_file_inode_operations;
+ inode->i_fop = &fuse_file_operations;
+ }
+ else if(S_ISDIR(inode->i_mode)) {
+ inode->i_op = &fuse_dir_inode_operations;
+ inode->i_fop = &fuse_dir_operations;
+ }
else if(S_ISLNK(inode->i_mode))
- fuse_symlink_init(inode);
+ inode->i_op = &fuse_symlink_inode_operations;
else {
- fuse_special_init(inode);
+ inode->i_op = &fuse_special_inode_operations;
init_special_inode(inode, inode->i_mode, attr->rdev);
}
}
@@ -73,11 +86,12 @@ static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry)
if(!inode)
return ERR_PTR(-ENOMEM);
- init_inode(inode, &arg.attr);
+ fuse_init_inode(inode, &arg.attr);
d_add(entry, inode);
return NULL;
}
+/* create needs to return a positive entry, so this also does a lookup */
static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
int rdev)
{
@@ -106,26 +120,142 @@ static int fuse_mknod(struct inode *dir, struct dentry *entry, int mode,
out.arg = &outarg;
request_send(fc, &in, &out);
kfree(inarg);
- if(out.h.result)
+
+ if(out.h.result)
return out.h.result;
inode = iget(dir->i_sb, outarg.ino);
if(!inode)
return -ENOMEM;
-
- init_inode(inode, &outarg.attr);
+
+ fuse_init_inode(inode, &outarg.attr);
d_add(entry, inode);
+
return 0;
}
+
static int fuse_create(struct inode *dir, struct dentry *entry, int mode)
{
return fuse_mknod(dir, entry, mode, 0);
}
-static int fuse_permission(struct inode *inode, int mask)
+static int fuse_mkdir(struct inode *dir, struct dentry *entry, int mode)
+{
+ struct fuse_conn *fc = dir->i_sb->u.generic_sbp;
+ struct fuse_in in = FUSE_IN_INIT;
+ struct fuse_out out = FUSE_OUT_INIT;
+ struct fuse_mkdir_in *inarg;
+ unsigned int insize;
+
+ insize = offsetof(struct fuse_mkdir_in, name) + entry->d_name.len + 1;
+ inarg = kmalloc(insize, GFP_KERNEL);
+ if(!inarg)
+ return -ENOMEM;
+
+ inarg->mode = mode;
+ strcpy(inarg->name, entry->d_name.name);
+
+ in.h.opcode = FUSE_MKDIR;
+ in.h.ino = dir->i_ino;
+ in.argsize = insize;
+ in.arg = inarg;
+ request_send(fc, &in, &out);
+ kfree(inarg);
+
+ return out.h.result;
+}
+
+static int fuse_symlink(struct inode *dir, struct dentry *entry,
+ const char *link)
+{
+ struct fuse_conn *fc = dir->i_sb->u.generic_sbp;
+ struct fuse_in in = FUSE_IN_INIT;
+ struct fuse_out out = FUSE_OUT_INIT;
+ char *inarg;
+ unsigned int insize;
+
+ insize = entry->d_name.len + 1 + strlen(link) + 1;
+ inarg = kmalloc(insize, GFP_KERNEL);
+ if(!inarg)
+ return -ENOMEM;
+
+ strcpy(inarg, entry->d_name.name);
+ strcpy(inarg + entry->d_name.len + 1, link);
+
+ in.h.opcode = FUSE_SYMLINK;
+ in.h.ino = dir->i_ino;
+ in.argsize = insize;
+ in.arg = inarg;
+ request_send(fc, &in, &out);
+ kfree(inarg);
+
+ return out.h.result;
+}
+
+static int fuse_remove(struct inode *dir, struct dentry *entry,
+ enum fuse_opcode op)
{
+ struct fuse_conn *fc = dir->i_sb->u.generic_sbp;
+ struct fuse_in in = FUSE_IN_INIT;
+ struct fuse_out out = FUSE_OUT_INIT;
+ in.h.opcode = op;
+ in.h.ino = dir->i_ino;
+ in.argsize = entry->d_name.len + 1;
+ in.arg = entry->d_name.name;
+ request_send(fc, &in, &out);
+ if(!out.h.result) {
+ d_drop(entry);
+ entry->d_inode->i_nlink = 0;
+ }
+
+ return out.h.result;
+}
+
+static int fuse_unlink(struct inode *dir, struct dentry *entry)
+{
+ return fuse_remove(dir, entry, FUSE_UNLINK);
+}
+
+static int fuse_rmdir(struct inode *dir, struct dentry *entry)
+{
+ return fuse_remove(dir, entry, FUSE_RMDIR);
+}
+
+static int fuse_rename(struct inode *olddir, struct dentry *oldent,
+ struct inode *newdir, struct dentry *newent)
+{
+ struct fuse_conn *fc = olddir->i_sb->u.generic_sbp;
+ struct fuse_in in = FUSE_IN_INIT;
+ struct fuse_out out = FUSE_OUT_INIT;
+ struct fuse_rename_in *inarg;
+ unsigned int oldnamsize = oldent->d_name.len + 1;
+ unsigned int newnamsize = newent->d_name.len + 1;
+ unsigned int insize;
+
+ insize = offsetof(struct fuse_rename_in, names) + oldnamsize +
+ newnamsize;
+ inarg = kmalloc(insize, GFP_KERNEL);
+ if(!inarg)
+ return -ENOMEM;
+
+ inarg->newdir = newdir->i_ino;
+ strcpy(inarg->names, oldent->d_name.name);
+ strcpy(inarg->names + oldnamsize, newent->d_name.name);
+
+ in.h.opcode = FUSE_RENAME;
+ in.h.ino = olddir->i_ino;
+ in.argsize = insize;
+ in.arg = inarg;
+ request_send(fc, &in, &out);
+ kfree(inarg);
+
+ return out.h.result;
+}
+
+static int fuse_permission(struct inode *inode, int mask)
+{
return 0;
}
@@ -145,41 +275,22 @@ static int fuse_revalidate(struct dentry *dentry)
if(out.h.result == 0)
change_attributes(inode, &arg.attr);
+ else
+ d_drop(dentry);
return out.h.result;
}
-
-#define DIR_BUFSIZE 2048
-
-static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
+static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
+ void *dstbuf, filldir_t filldir)
{
- struct file *cfile = file->private_data;
- char *buf;
- char *p;
- int ret;
- size_t nbytes;
-
- buf = kmalloc(DIR_BUFSIZE, GFP_KERNEL);
- if(!buf)
- return -ENOMEM;
-
- ret = kernel_read(cfile, file->f_pos, buf, DIR_BUFSIZE);
- if(ret < 0) {
- printk("fuse_readdir: failed to read container file\n");
- goto out;
- }
- nbytes = ret;
- p = buf;
- ret = 0;
while(nbytes >= FUSE_NAME_OFFSET) {
- struct fuse_dirent *dirent = (struct fuse_dirent *) p;
+ struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
size_t reclen = FUSE_DIRENT_SIZE(dirent);
int over;
if(dirent->namelen > NAME_MAX) {
printk("fuse_readdir: name too long\n");
- ret = -EPROTO;
- goto out;
+ return -EPROTO;
}
if(reclen > nbytes)
break;
@@ -189,17 +300,34 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
if(over)
break;
- p += reclen;
+ buf += reclen;
file->f_pos += reclen;
nbytes -= reclen;
}
- out:
- kfree(buf);
- return ret;
+ return 0;
}
+#define DIR_BUFSIZE 2048
+static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
+{
+ struct file *cfile = file->private_data;
+ char *buf;
+ int ret;
+
+ buf = kmalloc(DIR_BUFSIZE, GFP_KERNEL);
+ if(!buf)
+ return -ENOMEM;
+ ret = kernel_read(cfile, file->f_pos, buf, DIR_BUFSIZE);
+ if(ret < 0)
+ printk("fuse_readdir: failed to read container file\n");
+ else
+ ret = parse_dirfile(buf, ret, file, dstbuf, filldir);
+
+ kfree(buf);
+ return ret;
+}
static int read_link(struct dentry *dentry, char **bufp)
{
@@ -314,14 +442,14 @@ static struct inode_operations fuse_dir_inode_operations =
lookup: fuse_lookup,
create: fuse_create,
mknod: fuse_mknod,
-#if 0
-
- link: fuse_link,
- unlink: fuse_unlink,
- symlink: fuse_symlink,
mkdir: fuse_mkdir,
+ symlink: fuse_symlink,
+ unlink: fuse_unlink,
rmdir: fuse_rmdir,
rename: fuse_rename,
+#if 0
+ link: fuse_link,
+ setattr: fuse_setattr,
#endif
permission: fuse_permission,
revalidate: fuse_revalidate,
@@ -354,28 +482,6 @@ static struct inode_operations fuse_symlink_inode_operations =
revalidate: fuse_revalidate,
};
-void fuse_dir_init(struct inode *inode)
-{
- inode->i_op = &fuse_dir_inode_operations;
- inode->i_fop = &fuse_dir_operations;
-}
-
-void fuse_file_init(struct inode *inode)
-{
- inode->i_op = &fuse_file_inode_operations;
- inode->i_fop = &fuse_file_operations;
-}
-
-void fuse_symlink_init(struct inode *inode)
-{
- inode->i_op = &fuse_symlink_inode_operations;
-}
-
-void fuse_special_init(struct inode *inode)
-{
- inode->i_op = &fuse_special_inode_operations;
-}
-
/*
* Local Variables:
* indent-tabs-mode: t
generated by cgit v1.2.3 (git 2.39.1) at 2025-10-08 16:32:39 +0000