// SPDX-License-Identifier: GPL-2.0-or-later /* * super.c * * load/unload driver, mount/dismount volumes * * Copyright (C) 2002, 2004 Oracle. All rights reserved. */ #include <linux/module.h> #include <linux/fs.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> #include <linux/init.h> #include <linux/random.h> #include <linux/statfs.h> #include <linux/moduleparam.h> #include <linux/blkdev.h> #include <linux/socket.h> #include <linux/inet.h> #include <linux/parser.h> #include <linux/crc32.h> #include <linux/debugfs.h> #include <linux/mount.h> #include <linux/seq_file.h> #include <linux/quotaops.h> #include <linux/signal.h> #define CREATE_TRACE_POINTS #include "ocfs2_trace.h" #include <cluster/masklog.h> #include "ocfs2.h" /* this should be the only file to include a version 1 header */ #include "ocfs1_fs_compat.h" #include "alloc.h" #include "aops.h" #include "blockcheck.h" #include "dlmglue.h" #include "export.h" #include "extent_map.h" #include "heartbeat.h" #include "inode.h" #include "journal.h" #include "localalloc.h" #include "namei.h" #include "slot_map.h" #include "super.h" #include "sysfile.h" #include "uptodate.h" #include "xattr.h" #include "quota.h" #include "refcounttree.h" #include "suballoc.h" #include "buffer_head_io.h" #include "filecheck.h" static struct kmem_cache *ocfs2_inode_cachep; struct kmem_cache *ocfs2_dquot_cachep; struct kmem_cache *ocfs2_qf_chunk_cachep; static struct dentry *ocfs2_debugfs_root; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_DESCRIPTION(…) …; struct mount_options { … }; static int ocfs2_parse_options(struct super_block *sb, char *options, struct mount_options *mopt, int is_remount); static int ocfs2_check_set_options(struct super_block *sb, struct mount_options *options); static int ocfs2_show_options(struct seq_file *s, struct dentry *root); static void ocfs2_put_super(struct super_block *sb); static int ocfs2_mount_volume(struct super_block *sb); static int ocfs2_remount(struct super_block *sb, int *flags, char *data); static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err); static int ocfs2_initialize_mem_caches(void); static void ocfs2_free_mem_caches(void); static void ocfs2_delete_osb(struct ocfs2_super *osb); static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf); static int ocfs2_sync_fs(struct super_block *sb, int wait); static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb); static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb); static void ocfs2_release_system_inodes(struct ocfs2_super *osb); static int ocfs2_check_volume(struct ocfs2_super *osb); static int ocfs2_verify_volume(struct ocfs2_dinode *di, struct buffer_head *bh, u32 sectsize, struct ocfs2_blockcheck_stats *stats); static int ocfs2_initialize_super(struct super_block *sb, struct buffer_head *bh, int sector_size, struct ocfs2_blockcheck_stats *stats); static int ocfs2_get_sector(struct super_block *sb, struct buffer_head **bh, int block, int sect_size); static struct inode *ocfs2_alloc_inode(struct super_block *sb); static void ocfs2_free_inode(struct inode *inode); static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend); static int ocfs2_enable_quotas(struct ocfs2_super *osb); static void ocfs2_disable_quotas(struct ocfs2_super *osb); static struct dquot __rcu **ocfs2_get_dquots(struct inode *inode) { … } static const struct super_operations ocfs2_sops = …; enum { … }; static const match_table_t tokens = …; #ifdef CONFIG_DEBUG_FS static int ocfs2_osb_dump(struct ocfs2_super *osb, char *buf, int len) { … } static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) { … } static int ocfs2_debug_release(struct inode *inode, struct file *file) { … } static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) { … } #else static int ocfs2_osb_debug_open(struct inode *inode, struct file *file) { return 0; } static int ocfs2_debug_release(struct inode *inode, struct file *file) { return 0; } static ssize_t ocfs2_debug_read(struct file *file, char __user *buf, size_t nbytes, loff_t *ppos) { return 0; } #endif /* CONFIG_DEBUG_FS */ static const struct file_operations ocfs2_osb_debug_fops = …; static int ocfs2_sync_fs(struct super_block *sb, int wait) { … } static int ocfs2_need_system_inode(struct ocfs2_super *osb, int ino) { … } static int ocfs2_init_global_system_inodes(struct ocfs2_super *osb) { … } static int ocfs2_init_local_system_inodes(struct ocfs2_super *osb) { … } static void ocfs2_release_system_inodes(struct ocfs2_super *osb) { … } /* We're allocating fs objects, use GFP_NOFS */ static struct inode *ocfs2_alloc_inode(struct super_block *sb) { … } static void ocfs2_free_inode(struct inode *inode) { … } static unsigned long long ocfs2_max_file_offset(unsigned int bbits, unsigned int cbits) { … } static int ocfs2_remount(struct super_block *sb, int *flags, char *data) { … } static int ocfs2_sb_probe(struct super_block *sb, struct buffer_head **bh, int *sector_size, struct ocfs2_blockcheck_stats *stats) { … } static int ocfs2_verify_heartbeat(struct ocfs2_super *osb) { … } /* * If we're using a userspace stack, mount should have passed * a name that matches the disk. If not, mount should not * have passed a stack. */ static int ocfs2_verify_userspace_stack(struct ocfs2_super *osb, struct mount_options *mopt) { … } static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend) { … } static int ocfs2_enable_quotas(struct ocfs2_super *osb) { … } static void ocfs2_disable_quotas(struct ocfs2_super *osb) { … } static int ocfs2_fill_super(struct super_block *sb, void *data, int silent) { … } static struct dentry *ocfs2_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) { … } static struct file_system_type ocfs2_fs_type = …; MODULE_ALIAS_FS(…) …; static int ocfs2_check_set_options(struct super_block *sb, struct mount_options *options) { … } static int ocfs2_parse_options(struct super_block *sb, char *options, struct mount_options *mopt, int is_remount) { … } static int ocfs2_show_options(struct seq_file *s, struct dentry *root) { … } static int __init ocfs2_init(void) { … } static void __exit ocfs2_exit(void) { … } static void ocfs2_put_super(struct super_block *sb) { … } static int ocfs2_statfs(struct dentry *dentry, struct kstatfs *buf) { … } static void ocfs2_inode_init_once(void *data) { … } static int ocfs2_initialize_mem_caches(void) { … } static void ocfs2_free_mem_caches(void) { … } static int ocfs2_get_sector(struct super_block *sb, struct buffer_head **bh, int block, int sect_size) { … } static int ocfs2_mount_volume(struct super_block *sb) { … } static void ocfs2_dismount_volume(struct super_block *sb, int mnt_err) { … } static int ocfs2_setup_osb_uuid(struct ocfs2_super *osb, const unsigned char *uuid, unsigned uuid_bytes) { … } /* Make sure entire volume is addressable by our journal. Requires osb_clusters_at_boot to be valid and for the journal to have been initialized by ocfs2_journal_init(). */ static int ocfs2_journal_addressable(struct ocfs2_super *osb) { … } static int ocfs2_initialize_super(struct super_block *sb, struct buffer_head *bh, int sector_size, struct ocfs2_blockcheck_stats *stats) { … } /* * will return: -EAGAIN if it is ok to keep searching for superblocks * -EINVAL if there is a bad superblock * 0 on success */ static int ocfs2_verify_volume(struct ocfs2_dinode *di, struct buffer_head *bh, u32 blksz, struct ocfs2_blockcheck_stats *stats) { … } static int ocfs2_check_volume(struct ocfs2_super *osb) { … } /* * The routine gets called from dismount or close whenever a dismount on * volume is requested and the osb open count becomes 1. * It will remove the osb from the global list and also free up all the * initialized resources and fileobject. */ static void ocfs2_delete_osb(struct ocfs2_super *osb) { … } /* Depending on the mount option passed, perform one of the following: * Put OCFS2 into a readonly state (default) * Return EIO so that only the process errs * Fix the error as if fsck.ocfs2 -y * panic */ static int ocfs2_handle_error(struct super_block *sb) { … } int __ocfs2_error(struct super_block *sb, const char *function, const char *fmt, ...) { … } /* Handle critical errors. This is intentionally more drastic than * ocfs2_handle_error, so we only use for things like journal errors, * etc. */ void __ocfs2_abort(struct super_block *sb, const char *function, const char *fmt, ...) { … } /* * Void signal blockers, because in-kernel sigprocmask() only fails * when SIG_* is wrong. */ void ocfs2_block_signals(sigset_t *oldset) { … } void ocfs2_unblock_signals(sigset_t *oldset) { … } module_init(…) …; module_exit(ocfs2_exit);
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