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![David Woodhouse](/assets/img/avatar_default.png)
When POSIX ACL support was enabled, we weren't writing correct legacy modes to the medium on inode creation, or when the ACL was set. This meant that the permissions would be incorrect after the file system was remounted. Signed-off-by: David Woodhouse <dwmw2@infradead.org>
881 lines
22 KiB
C
881 lines
22 KiB
C
/*
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* JFFS2 -- Journalling Flash File System, Version 2.
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*
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* Copyright © 2001-2007 Red Hat, Inc.
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*
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* Created by David Woodhouse <dwmw2@infradead.org>
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*
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* For licensing information, see the file 'LICENCE' in this directory.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include <linux/fs.h>
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#include <linux/crc32.h>
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#include <linux/jffs2.h>
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#include "jffs2_fs_i.h"
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#include "jffs2_fs_sb.h"
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#include <linux/time.h>
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#include "nodelist.h"
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static int jffs2_readdir (struct file *, void *, filldir_t);
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static int jffs2_create (struct inode *,struct dentry *,int,
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struct nameidata *);
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static struct dentry *jffs2_lookup (struct inode *,struct dentry *,
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struct nameidata *);
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static int jffs2_link (struct dentry *,struct inode *,struct dentry *);
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static int jffs2_unlink (struct inode *,struct dentry *);
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static int jffs2_symlink (struct inode *,struct dentry *,const char *);
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static int jffs2_mkdir (struct inode *,struct dentry *,int);
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static int jffs2_rmdir (struct inode *,struct dentry *);
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static int jffs2_mknod (struct inode *,struct dentry *,int,dev_t);
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static int jffs2_rename (struct inode *, struct dentry *,
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struct inode *, struct dentry *);
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const struct file_operations jffs2_dir_operations =
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{
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.read = generic_read_dir,
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.readdir = jffs2_readdir,
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.ioctl = jffs2_ioctl,
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.fsync = jffs2_fsync
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};
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const struct inode_operations jffs2_dir_inode_operations =
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{
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.create = jffs2_create,
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.lookup = jffs2_lookup,
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.link = jffs2_link,
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.unlink = jffs2_unlink,
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.symlink = jffs2_symlink,
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.mkdir = jffs2_mkdir,
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.rmdir = jffs2_rmdir,
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.mknod = jffs2_mknod,
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.rename = jffs2_rename,
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.permission = jffs2_permission,
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.setattr = jffs2_setattr,
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.setxattr = jffs2_setxattr,
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.getxattr = jffs2_getxattr,
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.listxattr = jffs2_listxattr,
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.removexattr = jffs2_removexattr
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};
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/***********************************************************************/
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/* We keep the dirent list sorted in increasing order of name hash,
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and we use the same hash function as the dentries. Makes this
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nice and simple
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*/
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static struct dentry *jffs2_lookup(struct inode *dir_i, struct dentry *target,
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struct nameidata *nd)
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{
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struct jffs2_inode_info *dir_f;
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struct jffs2_sb_info *c;
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struct jffs2_full_dirent *fd = NULL, *fd_list;
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uint32_t ino = 0;
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struct inode *inode = NULL;
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D1(printk(KERN_DEBUG "jffs2_lookup()\n"));
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if (target->d_name.len > JFFS2_MAX_NAME_LEN)
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return ERR_PTR(-ENAMETOOLONG);
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dir_f = JFFS2_INODE_INFO(dir_i);
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c = JFFS2_SB_INFO(dir_i->i_sb);
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down(&dir_f->sem);
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/* NB: The 2.2 backport will need to explicitly check for '.' and '..' here */
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for (fd_list = dir_f->dents; fd_list && fd_list->nhash <= target->d_name.hash; fd_list = fd_list->next) {
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if (fd_list->nhash == target->d_name.hash &&
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(!fd || fd_list->version > fd->version) &&
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strlen(fd_list->name) == target->d_name.len &&
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!strncmp(fd_list->name, target->d_name.name, target->d_name.len)) {
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fd = fd_list;
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}
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}
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if (fd)
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ino = fd->ino;
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up(&dir_f->sem);
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if (ino) {
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inode = iget(dir_i->i_sb, ino);
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if (!inode) {
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printk(KERN_WARNING "iget() failed for ino #%u\n", ino);
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return (ERR_PTR(-EIO));
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}
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}
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d_add(target, inode);
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return NULL;
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}
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/***********************************************************************/
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static int jffs2_readdir(struct file *filp, void *dirent, filldir_t filldir)
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{
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struct jffs2_inode_info *f;
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struct jffs2_sb_info *c;
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struct inode *inode = filp->f_path.dentry->d_inode;
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struct jffs2_full_dirent *fd;
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unsigned long offset, curofs;
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D1(printk(KERN_DEBUG "jffs2_readdir() for dir_i #%lu\n", filp->f_path.dentry->d_inode->i_ino));
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f = JFFS2_INODE_INFO(inode);
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c = JFFS2_SB_INFO(inode->i_sb);
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offset = filp->f_pos;
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if (offset == 0) {
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D1(printk(KERN_DEBUG "Dirent 0: \".\", ino #%lu\n", inode->i_ino));
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if (filldir(dirent, ".", 1, 0, inode->i_ino, DT_DIR) < 0)
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goto out;
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offset++;
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}
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if (offset == 1) {
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unsigned long pino = parent_ino(filp->f_path.dentry);
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D1(printk(KERN_DEBUG "Dirent 1: \"..\", ino #%lu\n", pino));
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if (filldir(dirent, "..", 2, 1, pino, DT_DIR) < 0)
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goto out;
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offset++;
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}
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curofs=1;
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down(&f->sem);
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for (fd = f->dents; fd; fd = fd->next) {
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curofs++;
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/* First loop: curofs = 2; offset = 2 */
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if (curofs < offset) {
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D2(printk(KERN_DEBUG "Skipping dirent: \"%s\", ino #%u, type %d, because curofs %ld < offset %ld\n",
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fd->name, fd->ino, fd->type, curofs, offset));
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continue;
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}
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if (!fd->ino) {
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D2(printk(KERN_DEBUG "Skipping deletion dirent \"%s\"\n", fd->name));
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offset++;
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continue;
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}
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D2(printk(KERN_DEBUG "Dirent %ld: \"%s\", ino #%u, type %d\n", offset, fd->name, fd->ino, fd->type));
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if (filldir(dirent, fd->name, strlen(fd->name), offset, fd->ino, fd->type) < 0)
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break;
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offset++;
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}
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up(&f->sem);
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out:
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filp->f_pos = offset;
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return 0;
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}
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/***********************************************************************/
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static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode,
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struct nameidata *nd)
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{
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struct jffs2_raw_inode *ri;
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struct jffs2_inode_info *f, *dir_f;
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struct jffs2_sb_info *c;
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struct inode *inode;
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struct posix_acl *acl;
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int ret;
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ri = jffs2_alloc_raw_inode();
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if (!ri)
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return -ENOMEM;
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c = JFFS2_SB_INFO(dir_i->i_sb);
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D1(printk(KERN_DEBUG "jffs2_create()\n"));
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inode = jffs2_new_inode(dir_i, mode, ri, &acl);
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if (IS_ERR(inode)) {
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D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n"));
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jffs2_free_raw_inode(ri);
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return PTR_ERR(inode);
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}
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inode->i_op = &jffs2_file_inode_operations;
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inode->i_fop = &jffs2_file_operations;
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inode->i_mapping->a_ops = &jffs2_file_address_operations;
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inode->i_mapping->nrpages = 0;
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f = JFFS2_INODE_INFO(inode);
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dir_f = JFFS2_INODE_INFO(dir_i);
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ret = jffs2_do_create(c, dir_f, f, ri,
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dentry->d_name.name, dentry->d_name.len);
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if (ret)
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goto fail_acl;
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ret = jffs2_init_security(inode, dir_i);
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if (ret)
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goto fail_acl;
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ret = jffs2_init_acl(inode, acl);
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if (ret)
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goto fail;
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dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime));
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jffs2_free_raw_inode(ri);
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d_instantiate(dentry, inode);
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D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n",
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inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages));
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return 0;
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fail_acl:
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posix_acl_release(acl);
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fail:
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make_bad_inode(inode);
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iput(inode);
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jffs2_free_raw_inode(ri);
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return ret;
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}
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/***********************************************************************/
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static int jffs2_unlink(struct inode *dir_i, struct dentry *dentry)
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{
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struct jffs2_sb_info *c = JFFS2_SB_INFO(dir_i->i_sb);
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struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
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struct jffs2_inode_info *dead_f = JFFS2_INODE_INFO(dentry->d_inode);
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int ret;
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uint32_t now = get_seconds();
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ret = jffs2_do_unlink(c, dir_f, dentry->d_name.name,
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dentry->d_name.len, dead_f, now);
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if (dead_f->inocache)
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dentry->d_inode->i_nlink = dead_f->inocache->nlink;
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if (!ret)
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dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
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return ret;
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}
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/***********************************************************************/
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static int jffs2_link (struct dentry *old_dentry, struct inode *dir_i, struct dentry *dentry)
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{
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struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dentry->d_inode->i_sb);
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struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
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struct jffs2_inode_info *dir_f = JFFS2_INODE_INFO(dir_i);
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int ret;
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uint8_t type;
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uint32_t now;
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/* Don't let people make hard links to bad inodes. */
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if (!f->inocache)
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return -EIO;
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if (S_ISDIR(old_dentry->d_inode->i_mode))
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return -EPERM;
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/* XXX: This is ugly */
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type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
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if (!type) type = DT_REG;
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now = get_seconds();
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ret = jffs2_do_link(c, dir_f, f->inocache->ino, type, dentry->d_name.name, dentry->d_name.len, now);
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if (!ret) {
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down(&f->sem);
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old_dentry->d_inode->i_nlink = ++f->inocache->nlink;
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up(&f->sem);
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d_instantiate(dentry, old_dentry->d_inode);
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dir_i->i_mtime = dir_i->i_ctime = ITIME(now);
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atomic_inc(&old_dentry->d_inode->i_count);
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}
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return ret;
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}
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/***********************************************************************/
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static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target)
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{
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struct jffs2_inode_info *f, *dir_f;
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struct jffs2_sb_info *c;
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struct inode *inode;
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struct jffs2_raw_inode *ri;
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struct jffs2_raw_dirent *rd;
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struct jffs2_full_dnode *fn;
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struct jffs2_full_dirent *fd;
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int namelen;
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uint32_t alloclen;
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struct posix_acl *acl;
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int ret, targetlen = strlen(target);
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/* FIXME: If you care. We'd need to use frags for the target
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if it grows much more than this */
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if (targetlen > 254)
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return -EINVAL;
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ri = jffs2_alloc_raw_inode();
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if (!ri)
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return -ENOMEM;
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c = JFFS2_SB_INFO(dir_i->i_sb);
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/* Try to reserve enough space for both node and dirent.
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* Just the node will do for now, though
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*/
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namelen = dentry->d_name.len;
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ret = jffs2_reserve_space(c, sizeof(*ri) + targetlen, &alloclen,
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ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
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if (ret) {
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jffs2_free_raw_inode(ri);
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return ret;
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}
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inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri, &acl);
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if (IS_ERR(inode)) {
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jffs2_free_raw_inode(ri);
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jffs2_complete_reservation(c);
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return PTR_ERR(inode);
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}
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inode->i_op = &jffs2_symlink_inode_operations;
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f = JFFS2_INODE_INFO(inode);
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inode->i_size = targetlen;
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ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size);
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ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size);
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ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
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ri->compr = JFFS2_COMPR_NONE;
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ri->data_crc = cpu_to_je32(crc32(0, target, targetlen));
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ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
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fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL);
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jffs2_free_raw_inode(ri);
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if (IS_ERR(fn)) {
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/* Eeek. Wave bye bye */
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up(&f->sem);
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jffs2_complete_reservation(c);
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jffs2_clear_inode(inode);
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posix_acl_release(acl);
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return PTR_ERR(fn);
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}
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/* We use f->target field to store the target path. */
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f->target = kmalloc(targetlen + 1, GFP_KERNEL);
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if (!f->target) {
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printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1);
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up(&f->sem);
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jffs2_complete_reservation(c);
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jffs2_clear_inode(inode);
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posix_acl_release(acl);
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return -ENOMEM;
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}
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memcpy(f->target, target, targetlen + 1);
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D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target));
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/* No data here. Only a metadata node, which will be
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obsoleted by the first data write
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*/
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f->metadata = fn;
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up(&f->sem);
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jffs2_complete_reservation(c);
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ret = jffs2_init_security(inode, dir_i);
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if (ret) {
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jffs2_clear_inode(inode);
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posix_acl_release(acl);
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return ret;
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}
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ret = jffs2_init_acl(inode, acl);
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if (ret) {
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jffs2_clear_inode(inode);
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return ret;
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}
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ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
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ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
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if (ret) {
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/* Eep. */
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jffs2_clear_inode(inode);
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return ret;
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}
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rd = jffs2_alloc_raw_dirent();
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if (!rd) {
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/* Argh. Now we treat it like a normal delete */
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jffs2_complete_reservation(c);
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jffs2_clear_inode(inode);
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return -ENOMEM;
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}
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dir_f = JFFS2_INODE_INFO(dir_i);
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down(&dir_f->sem);
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rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
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rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
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rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
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rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
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rd->pino = cpu_to_je32(dir_i->i_ino);
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rd->version = cpu_to_je32(++dir_f->highest_version);
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rd->ino = cpu_to_je32(inode->i_ino);
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rd->mctime = cpu_to_je32(get_seconds());
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rd->nsize = namelen;
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rd->type = DT_LNK;
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rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
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rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
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fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
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if (IS_ERR(fd)) {
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/* dirent failed to write. Delete the inode normally
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as if it were the final unlink() */
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jffs2_complete_reservation(c);
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jffs2_free_raw_dirent(rd);
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up(&dir_f->sem);
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jffs2_clear_inode(inode);
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return PTR_ERR(fd);
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}
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dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
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jffs2_free_raw_dirent(rd);
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/* Link the fd into the inode's list, obsoleting an old
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one if necessary. */
|
|
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
|
|
|
|
up(&dir_f->sem);
|
|
jffs2_complete_reservation(c);
|
|
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode)
|
|
{
|
|
struct jffs2_inode_info *f, *dir_f;
|
|
struct jffs2_sb_info *c;
|
|
struct inode *inode;
|
|
struct jffs2_raw_inode *ri;
|
|
struct jffs2_raw_dirent *rd;
|
|
struct jffs2_full_dnode *fn;
|
|
struct jffs2_full_dirent *fd;
|
|
int namelen;
|
|
uint32_t alloclen;
|
|
struct posix_acl *acl;
|
|
int ret;
|
|
|
|
mode |= S_IFDIR;
|
|
|
|
ri = jffs2_alloc_raw_inode();
|
|
if (!ri)
|
|
return -ENOMEM;
|
|
|
|
c = JFFS2_SB_INFO(dir_i->i_sb);
|
|
|
|
/* Try to reserve enough space for both node and dirent.
|
|
* Just the node will do for now, though
|
|
*/
|
|
namelen = dentry->d_name.len;
|
|
ret = jffs2_reserve_space(c, sizeof(*ri), &alloclen, ALLOC_NORMAL,
|
|
JFFS2_SUMMARY_INODE_SIZE);
|
|
|
|
if (ret) {
|
|
jffs2_free_raw_inode(ri);
|
|
return ret;
|
|
}
|
|
|
|
inode = jffs2_new_inode(dir_i, mode, ri, &acl);
|
|
|
|
if (IS_ERR(inode)) {
|
|
jffs2_free_raw_inode(ri);
|
|
jffs2_complete_reservation(c);
|
|
return PTR_ERR(inode);
|
|
}
|
|
|
|
inode->i_op = &jffs2_dir_inode_operations;
|
|
inode->i_fop = &jffs2_dir_operations;
|
|
/* Directories get nlink 2 at start */
|
|
inode->i_nlink = 2;
|
|
|
|
f = JFFS2_INODE_INFO(inode);
|
|
|
|
ri->data_crc = cpu_to_je32(0);
|
|
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
|
|
|
|
fn = jffs2_write_dnode(c, f, ri, NULL, 0, ALLOC_NORMAL);
|
|
|
|
jffs2_free_raw_inode(ri);
|
|
|
|
if (IS_ERR(fn)) {
|
|
/* Eeek. Wave bye bye */
|
|
up(&f->sem);
|
|
jffs2_complete_reservation(c);
|
|
jffs2_clear_inode(inode);
|
|
posix_acl_release(acl);
|
|
return PTR_ERR(fn);
|
|
}
|
|
/* No data here. Only a metadata node, which will be
|
|
obsoleted by the first data write
|
|
*/
|
|
f->metadata = fn;
|
|
up(&f->sem);
|
|
|
|
jffs2_complete_reservation(c);
|
|
|
|
ret = jffs2_init_security(inode, dir_i);
|
|
if (ret) {
|
|
jffs2_clear_inode(inode);
|
|
posix_acl_release(acl);
|
|
return ret;
|
|
}
|
|
ret = jffs2_init_acl(inode, acl);
|
|
if (ret) {
|
|
jffs2_clear_inode(inode);
|
|
return ret;
|
|
}
|
|
|
|
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
|
|
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
|
|
if (ret) {
|
|
/* Eep. */
|
|
jffs2_clear_inode(inode);
|
|
return ret;
|
|
}
|
|
|
|
rd = jffs2_alloc_raw_dirent();
|
|
if (!rd) {
|
|
/* Argh. Now we treat it like a normal delete */
|
|
jffs2_complete_reservation(c);
|
|
jffs2_clear_inode(inode);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dir_f = JFFS2_INODE_INFO(dir_i);
|
|
down(&dir_f->sem);
|
|
|
|
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
|
|
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
|
|
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
|
|
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
|
|
|
|
rd->pino = cpu_to_je32(dir_i->i_ino);
|
|
rd->version = cpu_to_je32(++dir_f->highest_version);
|
|
rd->ino = cpu_to_je32(inode->i_ino);
|
|
rd->mctime = cpu_to_je32(get_seconds());
|
|
rd->nsize = namelen;
|
|
rd->type = DT_DIR;
|
|
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
|
|
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
|
|
|
|
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
|
|
|
|
if (IS_ERR(fd)) {
|
|
/* dirent failed to write. Delete the inode normally
|
|
as if it were the final unlink() */
|
|
jffs2_complete_reservation(c);
|
|
jffs2_free_raw_dirent(rd);
|
|
up(&dir_f->sem);
|
|
jffs2_clear_inode(inode);
|
|
return PTR_ERR(fd);
|
|
}
|
|
|
|
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
|
|
inc_nlink(dir_i);
|
|
|
|
jffs2_free_raw_dirent(rd);
|
|
|
|
/* Link the fd into the inode's list, obsoleting an old
|
|
one if necessary. */
|
|
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
|
|
|
|
up(&dir_f->sem);
|
|
jffs2_complete_reservation(c);
|
|
|
|
d_instantiate(dentry, inode);
|
|
return 0;
|
|
}
|
|
|
|
static int jffs2_rmdir (struct inode *dir_i, struct dentry *dentry)
|
|
{
|
|
struct jffs2_inode_info *f = JFFS2_INODE_INFO(dentry->d_inode);
|
|
struct jffs2_full_dirent *fd;
|
|
int ret;
|
|
|
|
for (fd = f->dents ; fd; fd = fd->next) {
|
|
if (fd->ino)
|
|
return -ENOTEMPTY;
|
|
}
|
|
ret = jffs2_unlink(dir_i, dentry);
|
|
if (!ret)
|
|
drop_nlink(dir_i);
|
|
return ret;
|
|
}
|
|
|
|
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, dev_t rdev)
|
|
{
|
|
struct jffs2_inode_info *f, *dir_f;
|
|
struct jffs2_sb_info *c;
|
|
struct inode *inode;
|
|
struct jffs2_raw_inode *ri;
|
|
struct jffs2_raw_dirent *rd;
|
|
struct jffs2_full_dnode *fn;
|
|
struct jffs2_full_dirent *fd;
|
|
int namelen;
|
|
union jffs2_device_node dev;
|
|
int devlen = 0;
|
|
uint32_t alloclen;
|
|
struct posix_acl *acl;
|
|
int ret;
|
|
|
|
if (!new_valid_dev(rdev))
|
|
return -EINVAL;
|
|
|
|
ri = jffs2_alloc_raw_inode();
|
|
if (!ri)
|
|
return -ENOMEM;
|
|
|
|
c = JFFS2_SB_INFO(dir_i->i_sb);
|
|
|
|
if (S_ISBLK(mode) || S_ISCHR(mode))
|
|
devlen = jffs2_encode_dev(&dev, rdev);
|
|
|
|
/* Try to reserve enough space for both node and dirent.
|
|
* Just the node will do for now, though
|
|
*/
|
|
namelen = dentry->d_name.len;
|
|
ret = jffs2_reserve_space(c, sizeof(*ri) + devlen, &alloclen,
|
|
ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE);
|
|
|
|
if (ret) {
|
|
jffs2_free_raw_inode(ri);
|
|
return ret;
|
|
}
|
|
|
|
inode = jffs2_new_inode(dir_i, mode, ri, &acl);
|
|
|
|
if (IS_ERR(inode)) {
|
|
jffs2_free_raw_inode(ri);
|
|
jffs2_complete_reservation(c);
|
|
return PTR_ERR(inode);
|
|
}
|
|
inode->i_op = &jffs2_file_inode_operations;
|
|
init_special_inode(inode, inode->i_mode, rdev);
|
|
|
|
f = JFFS2_INODE_INFO(inode);
|
|
|
|
ri->dsize = ri->csize = cpu_to_je32(devlen);
|
|
ri->totlen = cpu_to_je32(sizeof(*ri) + devlen);
|
|
ri->hdr_crc = cpu_to_je32(crc32(0, ri, sizeof(struct jffs2_unknown_node)-4));
|
|
|
|
ri->compr = JFFS2_COMPR_NONE;
|
|
ri->data_crc = cpu_to_je32(crc32(0, &dev, devlen));
|
|
ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8));
|
|
|
|
fn = jffs2_write_dnode(c, f, ri, (char *)&dev, devlen, ALLOC_NORMAL);
|
|
|
|
jffs2_free_raw_inode(ri);
|
|
|
|
if (IS_ERR(fn)) {
|
|
/* Eeek. Wave bye bye */
|
|
up(&f->sem);
|
|
jffs2_complete_reservation(c);
|
|
jffs2_clear_inode(inode);
|
|
posix_acl_release(acl);
|
|
return PTR_ERR(fn);
|
|
}
|
|
/* No data here. Only a metadata node, which will be
|
|
obsoleted by the first data write
|
|
*/
|
|
f->metadata = fn;
|
|
up(&f->sem);
|
|
|
|
jffs2_complete_reservation(c);
|
|
|
|
ret = jffs2_init_security(inode, dir_i);
|
|
if (ret) {
|
|
jffs2_clear_inode(inode);
|
|
posix_acl_release(acl);
|
|
return ret;
|
|
}
|
|
ret = jffs2_init_acl(inode, acl);
|
|
if (ret) {
|
|
jffs2_clear_inode(inode);
|
|
return ret;
|
|
}
|
|
|
|
ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen,
|
|
ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen));
|
|
if (ret) {
|
|
/* Eep. */
|
|
jffs2_clear_inode(inode);
|
|
return ret;
|
|
}
|
|
|
|
rd = jffs2_alloc_raw_dirent();
|
|
if (!rd) {
|
|
/* Argh. Now we treat it like a normal delete */
|
|
jffs2_complete_reservation(c);
|
|
jffs2_clear_inode(inode);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dir_f = JFFS2_INODE_INFO(dir_i);
|
|
down(&dir_f->sem);
|
|
|
|
rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
|
|
rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT);
|
|
rd->totlen = cpu_to_je32(sizeof(*rd) + namelen);
|
|
rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4));
|
|
|
|
rd->pino = cpu_to_je32(dir_i->i_ino);
|
|
rd->version = cpu_to_je32(++dir_f->highest_version);
|
|
rd->ino = cpu_to_je32(inode->i_ino);
|
|
rd->mctime = cpu_to_je32(get_seconds());
|
|
rd->nsize = namelen;
|
|
|
|
/* XXX: This is ugly. */
|
|
rd->type = (mode & S_IFMT) >> 12;
|
|
|
|
rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8));
|
|
rd->name_crc = cpu_to_je32(crc32(0, dentry->d_name.name, namelen));
|
|
|
|
fd = jffs2_write_dirent(c, dir_f, rd, dentry->d_name.name, namelen, ALLOC_NORMAL);
|
|
|
|
if (IS_ERR(fd)) {
|
|
/* dirent failed to write. Delete the inode normally
|
|
as if it were the final unlink() */
|
|
jffs2_complete_reservation(c);
|
|
jffs2_free_raw_dirent(rd);
|
|
up(&dir_f->sem);
|
|
jffs2_clear_inode(inode);
|
|
return PTR_ERR(fd);
|
|
}
|
|
|
|
dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(rd->mctime));
|
|
|
|
jffs2_free_raw_dirent(rd);
|
|
|
|
/* Link the fd into the inode's list, obsoleting an old
|
|
one if necessary. */
|
|
jffs2_add_fd_to_list(c, fd, &dir_f->dents);
|
|
|
|
up(&dir_f->sem);
|
|
jffs2_complete_reservation(c);
|
|
|
|
d_instantiate(dentry, inode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jffs2_rename (struct inode *old_dir_i, struct dentry *old_dentry,
|
|
struct inode *new_dir_i, struct dentry *new_dentry)
|
|
{
|
|
int ret;
|
|
struct jffs2_sb_info *c = JFFS2_SB_INFO(old_dir_i->i_sb);
|
|
struct jffs2_inode_info *victim_f = NULL;
|
|
uint8_t type;
|
|
uint32_t now;
|
|
|
|
/* The VFS will check for us and prevent trying to rename a
|
|
* file over a directory and vice versa, but if it's a directory,
|
|
* the VFS can't check whether the victim is empty. The filesystem
|
|
* needs to do that for itself.
|
|
*/
|
|
if (new_dentry->d_inode) {
|
|
victim_f = JFFS2_INODE_INFO(new_dentry->d_inode);
|
|
if (S_ISDIR(new_dentry->d_inode->i_mode)) {
|
|
struct jffs2_full_dirent *fd;
|
|
|
|
down(&victim_f->sem);
|
|
for (fd = victim_f->dents; fd; fd = fd->next) {
|
|
if (fd->ino) {
|
|
up(&victim_f->sem);
|
|
return -ENOTEMPTY;
|
|
}
|
|
}
|
|
up(&victim_f->sem);
|
|
}
|
|
}
|
|
|
|
/* XXX: We probably ought to alloc enough space for
|
|
both nodes at the same time. Writing the new link,
|
|
then getting -ENOSPC, is quite bad :)
|
|
*/
|
|
|
|
/* Make a hard link */
|
|
|
|
/* XXX: This is ugly */
|
|
type = (old_dentry->d_inode->i_mode & S_IFMT) >> 12;
|
|
if (!type) type = DT_REG;
|
|
|
|
now = get_seconds();
|
|
ret = jffs2_do_link(c, JFFS2_INODE_INFO(new_dir_i),
|
|
old_dentry->d_inode->i_ino, type,
|
|
new_dentry->d_name.name, new_dentry->d_name.len, now);
|
|
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (victim_f) {
|
|
/* There was a victim. Kill it off nicely */
|
|
drop_nlink(new_dentry->d_inode);
|
|
/* Don't oops if the victim was a dirent pointing to an
|
|
inode which didn't exist. */
|
|
if (victim_f->inocache) {
|
|
down(&victim_f->sem);
|
|
victim_f->inocache->nlink--;
|
|
up(&victim_f->sem);
|
|
}
|
|
}
|
|
|
|
/* If it was a directory we moved, and there was no victim,
|
|
increase i_nlink on its new parent */
|
|
if (S_ISDIR(old_dentry->d_inode->i_mode) && !victim_f)
|
|
inc_nlink(new_dir_i);
|
|
|
|
/* Unlink the original */
|
|
ret = jffs2_do_unlink(c, JFFS2_INODE_INFO(old_dir_i),
|
|
old_dentry->d_name.name, old_dentry->d_name.len, NULL, now);
|
|
|
|
/* We don't touch inode->i_nlink */
|
|
|
|
if (ret) {
|
|
/* Oh shit. We really ought to make a single node which can do both atomically */
|
|
struct jffs2_inode_info *f = JFFS2_INODE_INFO(old_dentry->d_inode);
|
|
down(&f->sem);
|
|
inc_nlink(old_dentry->d_inode);
|
|
if (f->inocache)
|
|
f->inocache->nlink++;
|
|
up(&f->sem);
|
|
|
|
printk(KERN_NOTICE "jffs2_rename(): Link succeeded, unlink failed (err %d). You now have a hard link\n", ret);
|
|
/* Might as well let the VFS know */
|
|
d_instantiate(new_dentry, old_dentry->d_inode);
|
|
atomic_inc(&old_dentry->d_inode->i_count);
|
|
new_dir_i->i_mtime = new_dir_i->i_ctime = ITIME(now);
|
|
return ret;
|
|
}
|
|
|
|
if (S_ISDIR(old_dentry->d_inode->i_mode))
|
|
drop_nlink(old_dir_i);
|
|
|
|
new_dir_i->i_mtime = new_dir_i->i_ctime = old_dir_i->i_mtime = old_dir_i->i_ctime = ITIME(now);
|
|
|
|
return 0;
|
|
}
|
|
|