// SPDX-License-Identifier: GPL-2.0-or-later /* * namei.c * * Create and rename file, directory, symlinks * * Copyright (C) 2002, 2004 Oracle. All rights reserved. * * Portions of this code from linux/fs/ext3/dir.c * * Copyright (C) 1992, 1993, 1994, 1995 * Remy Card ([email protected]) * Laboratoire MASI - Institut Blaise pascal * Universite Pierre et Marie Curie (Paris VI) * * from * * linux/fs/minix/dir.c * * Copyright (C) 1991, 1992 Linux Torvalds */ #include <linux/fs.h> #include <linux/types.h> #include <linux/slab.h> #include <linux/highmem.h> #include <linux/quotaops.h> #include <linux/iversion.h> #include <cluster/masklog.h> #include "ocfs2.h" #include "alloc.h" #include "dcache.h" #include "dir.h" #include "dlmglue.h" #include "extent_map.h" #include "file.h" #include "inode.h" #include "journal.h" #include "namei.h" #include "suballoc.h" #include "super.h" #include "symlink.h" #include "sysfile.h" #include "uptodate.h" #include "xattr.h" #include "acl.h" #include "ocfs2_trace.h" #include "ioctl.h" #include "buffer_head_io.h" static int ocfs2_mknod_locked(struct ocfs2_super *osb, struct inode *dir, struct inode *inode, dev_t dev, struct buffer_head **new_fe_bh, struct buffer_head *parent_fe_bh, handle_t *handle, struct ocfs2_alloc_context *inode_ac); static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, struct inode **ret_orphan_dir, u64 blkno, char *name, struct ocfs2_dir_lookup_result *lookup, bool dio); static int ocfs2_orphan_add(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, struct buffer_head *fe_bh, char *name, struct ocfs2_dir_lookup_result *lookup, struct inode *orphan_dir_inode, bool dio); static int ocfs2_create_symlink_data(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, const char *symname); static int ocfs2_double_lock(struct ocfs2_super *osb, struct buffer_head **bh1, struct inode *inode1, struct buffer_head **bh2, struct inode *inode2, int rename); static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2); /* An orphan dir name is an 8 byte value, printed as a hex string */ #define OCFS2_ORPHAN_NAMELEN … static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { … } static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode) { … } static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb, struct dentry *dentry, struct inode *inode) { … } static int ocfs2_mknod(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, dev_t dev) { … } static int __ocfs2_mknod_locked(struct inode *dir, struct inode *inode, dev_t dev, struct buffer_head **new_fe_bh, struct buffer_head *parent_fe_bh, handle_t *handle, struct ocfs2_alloc_context *inode_ac, u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit) { … } static int ocfs2_mknod_locked(struct ocfs2_super *osb, struct inode *dir, struct inode *inode, dev_t dev, struct buffer_head **new_fe_bh, struct buffer_head *parent_fe_bh, handle_t *handle, struct ocfs2_alloc_context *inode_ac) { … } static int ocfs2_mkdir(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode) { … } static int ocfs2_create(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { … } static int ocfs2_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { … } /* * Takes and drops an exclusive lock on the given dentry. This will * force other nodes to drop it. */ static int ocfs2_remote_dentry_delete(struct dentry *dentry) { … } static inline int ocfs2_inode_is_unlinkable(struct inode *inode) { … } static int ocfs2_unlink(struct inode *dir, struct dentry *dentry) { … } static int ocfs2_check_if_ancestor(struct ocfs2_super *osb, u64 src_inode_no, u64 dest_inode_no) { … } /* * The only place this should be used is rename and link! * if they have the same id, then the 1st one is the only one locked. */ static int ocfs2_double_lock(struct ocfs2_super *osb, struct buffer_head **bh1, struct inode *inode1, struct buffer_head **bh2, struct inode *inode2, int rename) { … } static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2) { … } static int ocfs2_rename(struct mnt_idmap *idmap, struct inode *old_dir, struct dentry *old_dentry, struct inode *new_dir, struct dentry *new_dentry, unsigned int flags) { … } /* * we expect i_size = strlen(symname). Copy symname into the file * data, including the null terminator. */ static int ocfs2_create_symlink_data(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, const char *symname) { … } static int ocfs2_symlink(struct mnt_idmap *idmap, struct inode *dir, struct dentry *dentry, const char *symname) { … } static int ocfs2_blkno_stringify(u64 blkno, char *name) { … } static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb, struct inode **ret_orphan_dir, struct buffer_head **ret_orphan_dir_bh) { … } static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode, struct buffer_head *orphan_dir_bh, u64 blkno, char *name, struct ocfs2_dir_lookup_result *lookup, bool dio) { … } /** * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for * insertion of an orphan. * @osb: ocfs2 file system * @ret_orphan_dir: Orphan dir inode - returned locked! * @blkno: Actual block number of the inode to be inserted into orphan dir. * @name: Buffer to store the name of the orphan. * @lookup: dir lookup result, to be passed back into functions like * ocfs2_orphan_add * @dio: Flag indicating if direct IO is being used or not. * * Returns zero on success and the ret_orphan_dir, name and lookup * fields will be populated. * * Returns non-zero on failure. */ static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb, struct inode **ret_orphan_dir, u64 blkno, char *name, struct ocfs2_dir_lookup_result *lookup, bool dio) { … } static int ocfs2_orphan_add(struct ocfs2_super *osb, handle_t *handle, struct inode *inode, struct buffer_head *fe_bh, char *name, struct ocfs2_dir_lookup_result *lookup, struct inode *orphan_dir_inode, bool dio) { … } /* unlike orphan_add, we expect the orphan dir to already be locked here. */ int ocfs2_orphan_del(struct ocfs2_super *osb, handle_t *handle, struct inode *orphan_dir_inode, struct inode *inode, struct buffer_head *orphan_dir_bh, bool dio) { … } /** * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly * allocated file. This is different from the typical 'add to orphan dir' * operation in that the inode does not yet exist. This is a problem because * the orphan dir stringifies the inode block number to come up with it's * dirent. Obviously if the inode does not yet exist we have a chicken and egg * problem. This function works around it by calling deeper into the orphan * and suballoc code than other callers. Use this only by necessity. * @dir: The directory which this inode will ultimately wind up under - not the * orphan dir! * @dir_bh: buffer_head the @dir inode block * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled * with the string to be used for orphan dirent. Pass back to the orphan dir * code. * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan * dir code. * @ret_di_blkno: block number where the new inode will be allocated. * @orphan_insert: Dir insert context to be passed back into orphan dir code. * @ret_inode_ac: Inode alloc context to be passed back to the allocator. * * Returns zero on success and the ret_orphan_dir, name and lookup * fields will be populated. * * Returns non-zero on failure. */ static int ocfs2_prep_new_orphaned_file(struct inode *dir, struct buffer_head *dir_bh, char *orphan_name, struct inode **ret_orphan_dir, u64 *ret_di_blkno, struct ocfs2_dir_lookup_result *orphan_insert, struct ocfs2_alloc_context **ret_inode_ac) { … } int ocfs2_create_inode_in_orphan(struct inode *dir, int mode, struct inode **new_inode) { … } int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb, struct inode *inode) { … } int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb, struct inode *inode, struct buffer_head *di_bh, int update_isize, loff_t end) { … } int ocfs2_mv_orphaned_inode_to_new(struct inode *dir, struct inode *inode, struct dentry *dentry) { … } const struct inode_operations ocfs2_dir_iops = …;
Codebase Browser
linux