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exofs: super_operations and file_system_type
This patch ties all operation vectors into a file system superblock and registers the exofs file_system_type at module's load time. * The file system control block (AKA on-disk superblock) resides in an object with a special ID (defined in common.h). Information included in the file system control block is used to fill the in-memory superblock structure at mount time. This object is created before the file system is used by mkexofs.c It contains information such as: - The file system's magic number - The next inode number to be allocated Signed-off-by: Boaz Harrosh <bharrosh@panasas.com>
This commit is contained in:
Boaz Harrosh
parent
e6af00f1d1
commit
ba9e5e98ca
@ -12,5 +12,5 @@
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# Kbuild - Gets included from the Kernels Makefile and build system
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#
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exofs-y := osd.o inode.o file.o symlink.o namei.o dir.o
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exofs-y := osd.o inode.o file.o symlink.o namei.o dir.o super.o
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obj-$(CONFIG_EXOFS_FS) += exofs.o
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@ -140,6 +140,8 @@ int exofs_write_begin(struct file *file, struct address_space *mapping,
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struct page **pagep, void **fsdata);
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extern struct inode *exofs_iget(struct super_block *, unsigned long);
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struct inode *exofs_new_inode(struct inode *, int);
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extern int exofs_write_inode(struct inode *, int);
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extern void exofs_delete_inode(struct inode *);
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/* dir.c: */
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int exofs_add_link(struct dentry *, struct inode *);
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186
fs/exofs/inode.c
186
fs/exofs/inode.c
@ -1115,3 +1115,189 @@ struct inode *exofs_new_inode(struct inode *dir, int mode)
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return inode;
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}
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/*
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* struct to pass two arguments to update_inode's callback
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*/
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struct updatei_args {
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struct exofs_sb_info *sbi;
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struct exofs_fcb fcb;
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};
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/*
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* Callback function from exofs_update_inode().
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*/
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static void updatei_done(struct osd_request *or, void *p)
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{
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struct updatei_args *args = p;
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osd_end_request(or);
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atomic_dec(&args->sbi->s_curr_pending);
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kfree(args);
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}
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/*
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* Write the inode to the OSD. Just fill up the struct, and set the attribute
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* synchronously or asynchronously depending on the do_sync flag.
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*/
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static int exofs_update_inode(struct inode *inode, int do_sync)
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{
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struct exofs_i_info *oi = exofs_i(inode);
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struct super_block *sb = inode->i_sb;
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struct exofs_sb_info *sbi = sb->s_fs_info;
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struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF};
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struct osd_request *or;
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struct osd_attr attr;
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struct exofs_fcb *fcb;
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struct updatei_args *args;
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int ret;
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args = kzalloc(sizeof(*args), GFP_KERNEL);
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if (!args)
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return -ENOMEM;
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fcb = &args->fcb;
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fcb->i_mode = cpu_to_le16(inode->i_mode);
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fcb->i_uid = cpu_to_le32(inode->i_uid);
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fcb->i_gid = cpu_to_le32(inode->i_gid);
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fcb->i_links_count = cpu_to_le16(inode->i_nlink);
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fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
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fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
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fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
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oi->i_commit_size = i_size_read(inode);
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fcb->i_size = cpu_to_le64(oi->i_commit_size);
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fcb->i_generation = cpu_to_le32(inode->i_generation);
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if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
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if (old_valid_dev(inode->i_rdev)) {
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fcb->i_data[0] =
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cpu_to_le32(old_encode_dev(inode->i_rdev));
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fcb->i_data[1] = 0;
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} else {
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fcb->i_data[0] = 0;
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fcb->i_data[1] =
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cpu_to_le32(new_encode_dev(inode->i_rdev));
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fcb->i_data[2] = 0;
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}
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} else
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memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data));
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or = osd_start_request(sbi->s_dev, GFP_KERNEL);
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if (unlikely(!or)) {
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EXOFS_ERR("exofs_update_inode: osd_start_request failed.\n");
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ret = -ENOMEM;
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goto free_args;
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}
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osd_req_set_attributes(or, &obj);
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attr = g_attr_inode_data;
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attr.val_ptr = fcb;
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osd_req_add_set_attr_list(or, &attr, 1);
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if (!obj_created(oi)) {
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EXOFS_DBGMSG("!obj_created\n");
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BUG_ON(!obj_2bcreated(oi));
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wait_event(oi->i_wq, obj_created(oi));
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EXOFS_DBGMSG("wait_event done\n");
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}
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if (do_sync) {
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ret = exofs_sync_op(or, sbi->s_timeout, oi->i_cred);
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osd_end_request(or);
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goto free_args;
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} else {
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args->sbi = sbi;
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ret = exofs_async_op(or, updatei_done, args, oi->i_cred);
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if (ret) {
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osd_end_request(or);
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goto free_args;
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}
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atomic_inc(&sbi->s_curr_pending);
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goto out; /* deallocation in updatei_done */
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}
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free_args:
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kfree(args);
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out:
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EXOFS_DBGMSG("ret=>%d\n", ret);
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return ret;
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}
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int exofs_write_inode(struct inode *inode, int wait)
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{
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return exofs_update_inode(inode, wait);
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}
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/*
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* Callback function from exofs_delete_inode() - don't have much cleaning up to
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* do.
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*/
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static void delete_done(struct osd_request *or, void *p)
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{
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struct exofs_sb_info *sbi;
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osd_end_request(or);
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sbi = p;
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atomic_dec(&sbi->s_curr_pending);
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}
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/*
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* Called when the refcount of an inode reaches zero. We remove the object
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* from the OSD here. We make sure the object was created before we try and
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* delete it.
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*/
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void exofs_delete_inode(struct inode *inode)
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{
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struct exofs_i_info *oi = exofs_i(inode);
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struct super_block *sb = inode->i_sb;
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struct exofs_sb_info *sbi = sb->s_fs_info;
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struct osd_obj_id obj = {sbi->s_pid, inode->i_ino + EXOFS_OBJ_OFF};
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struct osd_request *or;
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int ret;
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truncate_inode_pages(&inode->i_data, 0);
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if (is_bad_inode(inode))
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goto no_delete;
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mark_inode_dirty(inode);
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exofs_update_inode(inode, inode_needs_sync(inode));
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inode->i_size = 0;
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if (inode->i_blocks)
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exofs_truncate(inode);
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clear_inode(inode);
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or = osd_start_request(sbi->s_dev, GFP_KERNEL);
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if (unlikely(!or)) {
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EXOFS_ERR("exofs_delete_inode: osd_start_request failed\n");
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return;
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}
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osd_req_remove_object(or, &obj);
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/* if we are deleting an obj that hasn't been created yet, wait */
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if (!obj_created(oi)) {
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BUG_ON(!obj_2bcreated(oi));
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wait_event(oi->i_wq, obj_created(oi));
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}
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ret = exofs_async_op(or, delete_done, sbi, oi->i_cred);
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if (ret) {
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EXOFS_ERR(
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"ERROR: @exofs_delete_inode exofs_async_op failed\n");
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osd_end_request(or);
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return;
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}
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atomic_inc(&sbi->s_curr_pending);
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return;
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no_delete:
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clear_inode(inode);
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}
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531
fs/exofs/super.c
Normal file
531
fs/exofs/super.c
Normal file
@ -0,0 +1,531 @@
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/*
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* Copyright (C) 2005, 2006
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* Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com)
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* Copyright (C) 2005, 2006
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* International Business Machines
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* Copyright (C) 2008, 2009
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* Boaz Harrosh <bharrosh@panasas.com>
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*
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* Copyrights for code taken from ext2:
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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* from
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* linux/fs/minix/inode.c
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* Copyright (C) 1991, 1992 Linus Torvalds
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*
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* This file is part of exofs.
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*
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* exofs is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation. Since it is based on ext2, and the only
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* valid version of GPL for the Linux kernel is version 2, the only valid
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* version of GPL for exofs is version 2.
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*
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* exofs is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with exofs; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <linux/string.h>
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#include <linux/parser.h>
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#include <linux/vfs.h>
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#include <linux/random.h>
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#include "exofs.h"
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/******************************************************************************
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* MOUNT OPTIONS
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*****************************************************************************/
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/*
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* struct to hold what we get from mount options
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*/
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struct exofs_mountopt {
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const char *dev_name;
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uint64_t pid;
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int timeout;
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};
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/*
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* exofs-specific mount-time options.
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*/
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enum { Opt_pid, Opt_to, Opt_mkfs, Opt_format, Opt_err };
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/*
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* Our mount-time options. These should ideally be 64-bit unsigned, but the
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* kernel's parsing functions do not currently support that. 32-bit should be
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* sufficient for most applications now.
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*/
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static match_table_t tokens = {
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{Opt_pid, "pid=%u"},
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{Opt_to, "to=%u"},
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{Opt_err, NULL}
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};
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/*
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* The main option parsing method. Also makes sure that all of the mandatory
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* mount options were set.
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*/
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static int parse_options(char *options, struct exofs_mountopt *opts)
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{
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char *p;
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substring_t args[MAX_OPT_ARGS];
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int option;
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bool s_pid = false;
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EXOFS_DBGMSG("parse_options %s\n", options);
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/* defaults */
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memset(opts, 0, sizeof(*opts));
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opts->timeout = BLK_DEFAULT_SG_TIMEOUT;
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while ((p = strsep(&options, ",")) != NULL) {
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int token;
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char str[32];
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if (!*p)
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continue;
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token = match_token(p, tokens, args);
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switch (token) {
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case Opt_pid:
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if (0 == match_strlcpy(str, &args[0], sizeof(str)))
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return -EINVAL;
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opts->pid = simple_strtoull(str, NULL, 0);
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if (opts->pid < EXOFS_MIN_PID) {
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EXOFS_ERR("Partition ID must be >= %u",
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EXOFS_MIN_PID);
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return -EINVAL;
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}
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s_pid = 1;
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break;
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case Opt_to:
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if (match_int(&args[0], &option))
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return -EINVAL;
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if (option <= 0) {
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EXOFS_ERR("Timout must be > 0");
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return -EINVAL;
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}
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opts->timeout = option * HZ;
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break;
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}
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}
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if (!s_pid) {
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EXOFS_ERR("Need to specify the following options:\n");
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EXOFS_ERR(" -o pid=pid_no_to_use\n");
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return -EINVAL;
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}
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return 0;
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}
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/******************************************************************************
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* INODE CACHE
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*****************************************************************************/
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/*
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* Our inode cache. Isn't it pretty?
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*/
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static struct kmem_cache *exofs_inode_cachep;
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/*
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* Allocate an inode in the cache
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*/
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static struct inode *exofs_alloc_inode(struct super_block *sb)
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{
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struct exofs_i_info *oi;
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oi = kmem_cache_alloc(exofs_inode_cachep, GFP_KERNEL);
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if (!oi)
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return NULL;
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oi->vfs_inode.i_version = 1;
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return &oi->vfs_inode;
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}
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/*
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* Remove an inode from the cache
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*/
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static void exofs_destroy_inode(struct inode *inode)
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{
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kmem_cache_free(exofs_inode_cachep, exofs_i(inode));
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}
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/*
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* Initialize the inode
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*/
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static void exofs_init_once(void *foo)
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{
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struct exofs_i_info *oi = foo;
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inode_init_once(&oi->vfs_inode);
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}
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/*
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* Create and initialize the inode cache
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*/
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static int init_inodecache(void)
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{
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exofs_inode_cachep = kmem_cache_create("exofs_inode_cache",
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sizeof(struct exofs_i_info), 0,
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SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD,
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exofs_init_once);
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if (exofs_inode_cachep == NULL)
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return -ENOMEM;
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return 0;
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}
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/*
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* Destroy the inode cache
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*/
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static void destroy_inodecache(void)
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{
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kmem_cache_destroy(exofs_inode_cachep);
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}
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/******************************************************************************
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* SUPERBLOCK FUNCTIONS
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*****************************************************************************/
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static const struct super_operations exofs_sops;
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/*
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* Write the superblock to the OSD
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*/
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static void exofs_write_super(struct super_block *sb)
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{
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struct exofs_sb_info *sbi;
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struct exofs_fscb *fscb;
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struct osd_request *or;
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struct osd_obj_id obj;
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int ret;
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fscb = kzalloc(sizeof(struct exofs_fscb), GFP_KERNEL);
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if (!fscb) {
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EXOFS_ERR("exofs_write_super: memory allocation failed.\n");
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return;
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}
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lock_kernel();
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sbi = sb->s_fs_info;
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fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
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fscb->s_numfiles = cpu_to_le32(sbi->s_numfiles);
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fscb->s_magic = cpu_to_le16(sb->s_magic);
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fscb->s_newfs = 0;
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or = osd_start_request(sbi->s_dev, GFP_KERNEL);
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if (unlikely(!or)) {
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EXOFS_ERR("exofs_write_super: osd_start_request failed.\n");
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goto out;
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}
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obj.partition = sbi->s_pid;
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obj.id = EXOFS_SUPER_ID;
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ret = osd_req_write_kern(or, &obj, 0, fscb, sizeof(*fscb));
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if (unlikely(ret)) {
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EXOFS_ERR("exofs_write_super: osd_req_write_kern failed.\n");
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goto out;
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}
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ret = exofs_sync_op(or, sbi->s_timeout, sbi->s_cred);
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if (unlikely(ret)) {
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EXOFS_ERR("exofs_write_super: exofs_sync_op failed.\n");
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goto out;
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}
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sb->s_dirt = 0;
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out:
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if (or)
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osd_end_request(or);
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unlock_kernel();
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kfree(fscb);
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}
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/*
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* This function is called when the vfs is freeing the superblock. We just
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* need to free our own part.
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*/
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static void exofs_put_super(struct super_block *sb)
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{
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int num_pend;
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struct exofs_sb_info *sbi = sb->s_fs_info;
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/* make sure there are no pending commands */
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for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
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num_pend = atomic_read(&sbi->s_curr_pending)) {
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wait_queue_head_t wq;
|
||||
init_waitqueue_head(&wq);
|
||||
wait_event_timeout(wq,
|
||||
(atomic_read(&sbi->s_curr_pending) == 0),
|
||||
msecs_to_jiffies(100));
|
||||
}
|
||||
|
||||
osduld_put_device(sbi->s_dev);
|
||||
kfree(sb->s_fs_info);
|
||||
sb->s_fs_info = NULL;
|
||||
}
|
||||
|
||||
/*
|
||||
* Read the superblock from the OSD and fill in the fields
|
||||
*/
|
||||
static int exofs_fill_super(struct super_block *sb, void *data, int silent)
|
||||
{
|
||||
struct inode *root;
|
||||
struct exofs_mountopt *opts = data;
|
||||
struct exofs_sb_info *sbi; /*extended info */
|
||||
struct exofs_fscb fscb; /*on-disk superblock info */
|
||||
struct osd_request *or = NULL;
|
||||
struct osd_obj_id obj;
|
||||
int ret;
|
||||
|
||||
sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
|
||||
if (!sbi)
|
||||
return -ENOMEM;
|
||||
sb->s_fs_info = sbi;
|
||||
|
||||
/* use mount options to fill superblock */
|
||||
sbi->s_dev = osduld_path_lookup(opts->dev_name);
|
||||
if (IS_ERR(sbi->s_dev)) {
|
||||
ret = PTR_ERR(sbi->s_dev);
|
||||
sbi->s_dev = NULL;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
sbi->s_pid = opts->pid;
|
||||
sbi->s_timeout = opts->timeout;
|
||||
|
||||
/* fill in some other data by hand */
|
||||
memset(sb->s_id, 0, sizeof(sb->s_id));
|
||||
strcpy(sb->s_id, "exofs");
|
||||
sb->s_blocksize = EXOFS_BLKSIZE;
|
||||
sb->s_blocksize_bits = EXOFS_BLKSHIFT;
|
||||
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
||||
atomic_set(&sbi->s_curr_pending, 0);
|
||||
sb->s_bdev = NULL;
|
||||
sb->s_dev = 0;
|
||||
|
||||
/* read data from on-disk superblock object */
|
||||
obj.partition = sbi->s_pid;
|
||||
obj.id = EXOFS_SUPER_ID;
|
||||
exofs_make_credential(sbi->s_cred, &obj);
|
||||
|
||||
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
|
||||
if (unlikely(!or)) {
|
||||
if (!silent)
|
||||
EXOFS_ERR(
|
||||
"exofs_fill_super: osd_start_request failed.\n");
|
||||
ret = -ENOMEM;
|
||||
goto free_sbi;
|
||||
}
|
||||
ret = osd_req_read_kern(or, &obj, 0, &fscb, sizeof(fscb));
|
||||
if (unlikely(ret)) {
|
||||
if (!silent)
|
||||
EXOFS_ERR(
|
||||
"exofs_fill_super: osd_req_read_kern failed.\n");
|
||||
ret = -ENOMEM;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
ret = exofs_sync_op(or, sbi->s_timeout, sbi->s_cred);
|
||||
if (unlikely(ret)) {
|
||||
if (!silent)
|
||||
EXOFS_ERR("exofs_fill_super: exofs_sync_op failed.\n");
|
||||
ret = -EIO;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
sb->s_magic = le16_to_cpu(fscb.s_magic);
|
||||
sbi->s_nextid = le64_to_cpu(fscb.s_nextid);
|
||||
sbi->s_numfiles = le32_to_cpu(fscb.s_numfiles);
|
||||
|
||||
/* make sure what we read from the object store is correct */
|
||||
if (sb->s_magic != EXOFS_SUPER_MAGIC) {
|
||||
if (!silent)
|
||||
EXOFS_ERR("ERROR: Bad magic value\n");
|
||||
ret = -EINVAL;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
/* start generation numbers from a random point */
|
||||
get_random_bytes(&sbi->s_next_generation, sizeof(u32));
|
||||
spin_lock_init(&sbi->s_next_gen_lock);
|
||||
|
||||
/* set up operation vectors */
|
||||
sb->s_op = &exofs_sops;
|
||||
root = exofs_iget(sb, EXOFS_ROOT_ID - EXOFS_OBJ_OFF);
|
||||
if (IS_ERR(root)) {
|
||||
EXOFS_ERR("ERROR: exofs_iget failed\n");
|
||||
ret = PTR_ERR(root);
|
||||
goto free_sbi;
|
||||
}
|
||||
sb->s_root = d_alloc_root(root);
|
||||
if (!sb->s_root) {
|
||||
iput(root);
|
||||
EXOFS_ERR("ERROR: get root inode failed\n");
|
||||
ret = -ENOMEM;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
if (!S_ISDIR(root->i_mode)) {
|
||||
dput(sb->s_root);
|
||||
sb->s_root = NULL;
|
||||
EXOFS_ERR("ERROR: corrupt root inode (mode = %hd)\n",
|
||||
root->i_mode);
|
||||
ret = -EINVAL;
|
||||
goto free_sbi;
|
||||
}
|
||||
|
||||
ret = 0;
|
||||
out:
|
||||
if (or)
|
||||
osd_end_request(or);
|
||||
return ret;
|
||||
|
||||
free_sbi:
|
||||
osduld_put_device(sbi->s_dev); /* NULL safe */
|
||||
kfree(sbi);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set up the superblock (calls exofs_fill_super eventually)
|
||||
*/
|
||||
static int exofs_get_sb(struct file_system_type *type,
|
||||
int flags, const char *dev_name,
|
||||
void *data, struct vfsmount *mnt)
|
||||
{
|
||||
struct exofs_mountopt opts;
|
||||
int ret;
|
||||
|
||||
ret = parse_options(data, &opts);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
opts.dev_name = dev_name;
|
||||
return get_sb_nodev(type, flags, &opts, exofs_fill_super, mnt);
|
||||
}
|
||||
|
||||
/*
|
||||
* Return information about the file system state in the buffer. This is used
|
||||
* by the 'df' command, for example.
|
||||
*/
|
||||
static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
||||
{
|
||||
struct super_block *sb = dentry->d_sb;
|
||||
struct exofs_sb_info *sbi = sb->s_fs_info;
|
||||
struct osd_obj_id obj = {sbi->s_pid, 0};
|
||||
struct osd_attr attrs[] = {
|
||||
ATTR_DEF(OSD_APAGE_PARTITION_QUOTAS,
|
||||
OSD_ATTR_PQ_CAPACITY_QUOTA, sizeof(__be64)),
|
||||
ATTR_DEF(OSD_APAGE_PARTITION_INFORMATION,
|
||||
OSD_ATTR_PI_USED_CAPACITY, sizeof(__be64)),
|
||||
};
|
||||
uint64_t capacity = ULLONG_MAX;
|
||||
uint64_t used = ULLONG_MAX;
|
||||
struct osd_request *or;
|
||||
uint8_t cred_a[OSD_CAP_LEN];
|
||||
int ret;
|
||||
|
||||
/* get used/capacity attributes */
|
||||
exofs_make_credential(cred_a, &obj);
|
||||
|
||||
or = osd_start_request(sbi->s_dev, GFP_KERNEL);
|
||||
if (unlikely(!or)) {
|
||||
EXOFS_DBGMSG("exofs_statfs: osd_start_request failed.\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
osd_req_get_attributes(or, &obj);
|
||||
osd_req_add_get_attr_list(or, attrs, ARRAY_SIZE(attrs));
|
||||
ret = exofs_sync_op(or, sbi->s_timeout, cred_a);
|
||||
if (unlikely(ret))
|
||||
goto out;
|
||||
|
||||
ret = extract_attr_from_req(or, &attrs[0]);
|
||||
if (likely(!ret))
|
||||
capacity = get_unaligned_be64(attrs[0].val_ptr);
|
||||
else
|
||||
EXOFS_DBGMSG("exofs_statfs: get capacity failed.\n");
|
||||
|
||||
ret = extract_attr_from_req(or, &attrs[1]);
|
||||
if (likely(!ret))
|
||||
used = get_unaligned_be64(attrs[1].val_ptr);
|
||||
else
|
||||
EXOFS_DBGMSG("exofs_statfs: get used-space failed.\n");
|
||||
|
||||
/* fill in the stats buffer */
|
||||
buf->f_type = EXOFS_SUPER_MAGIC;
|
||||
buf->f_bsize = EXOFS_BLKSIZE;
|
||||
buf->f_blocks = (capacity >> EXOFS_BLKSHIFT);
|
||||
buf->f_bfree = ((capacity - used) >> EXOFS_BLKSHIFT);
|
||||
buf->f_bavail = buf->f_bfree;
|
||||
buf->f_files = sbi->s_numfiles;
|
||||
buf->f_ffree = EXOFS_MAX_ID - sbi->s_numfiles;
|
||||
buf->f_namelen = EXOFS_NAME_LEN;
|
||||
|
||||
out:
|
||||
osd_end_request(or);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static const struct super_operations exofs_sops = {
|
||||
.alloc_inode = exofs_alloc_inode,
|
||||
.destroy_inode = exofs_destroy_inode,
|
||||
.write_inode = exofs_write_inode,
|
||||
.delete_inode = exofs_delete_inode,
|
||||
.put_super = exofs_put_super,
|
||||
.write_super = exofs_write_super,
|
||||
.statfs = exofs_statfs,
|
||||
};
|
||||
|
||||
/******************************************************************************
|
||||
* INSMOD/RMMOD
|
||||
*****************************************************************************/
|
||||
|
||||
/*
|
||||
* struct that describes this file system
|
||||
*/
|
||||
static struct file_system_type exofs_type = {
|
||||
.owner = THIS_MODULE,
|
||||
.name = "exofs",
|
||||
.get_sb = exofs_get_sb,
|
||||
.kill_sb = generic_shutdown_super,
|
||||
};
|
||||
|
||||
static int __init init_exofs(void)
|
||||
{
|
||||
int err;
|
||||
|
||||
err = init_inodecache();
|
||||
if (err)
|
||||
goto out;
|
||||
|
||||
err = register_filesystem(&exofs_type);
|
||||
if (err)
|
||||
goto out_d;
|
||||
|
||||
return 0;
|
||||
out_d:
|
||||
destroy_inodecache();
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
||||
static void __exit exit_exofs(void)
|
||||
{
|
||||
unregister_filesystem(&exofs_type);
|
||||
destroy_inodecache();
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Avishay Traeger <avishay@gmail.com>");
|
||||
MODULE_DESCRIPTION("exofs");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
module_init(init_exofs)
|
||||
module_exit(exit_exofs)
|
||||
Loading…
x
Reference in New Issue
Block a user