// FIXME: This seems like real cruft. Wouldn't it be better just to do the // right thing? static void icache_evict(struct _inode *root_i, struct _inode *i) { struct _inode *this = root_i, *next; restart: D2(printf("icache_evict\n")); // If this is an absolute search path from the root, // remove all cached inodes with i_count of zero (these are only // held where needed for dotdot filepaths) while (this) { next = this->i_cache_next; if (this != i && this->i_count == 0) { struct _inode *parent = this->i_parent; if (this->i_cache_next) this->i_cache_next->i_cache_prev = this->i_cache_prev; if (this->i_cache_prev) this->i_cache_prev->i_cache_next = this->i_cache_next; jffs2_clear_inode(this); memset(this, 0x5a, sizeof(*this)); free(this); if (parent && parent != this) { parent->i_count--; this = root_i; goto restart; } } this = next; } }
static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode) { struct jffs2_raw_inode *ri; struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; int ret; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; c = JFFS2_SB_INFO(dir_i->i_sb); D1(printk(KERN_DEBUG "jffs2_create()\n")); inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n")); jffs2_free_raw_inode(ri); return PTR_ERR(inode); } inode->i_op = &jffs2_file_inode_operations; inode->i_fop = &jffs2_file_operations; inode->i_mapping->a_ops = &jffs2_file_address_operations; inode->i_mapping->nrpages = 0; f = JFFS2_INODE_INFO(inode); dir_f = JFFS2_INODE_INFO(dir_i); ret = jffs2_do_create(c, dir_f, f, ri, dentry->d_name.name, dentry->d_name.len); if (ret) { jffs2_clear_inode(inode); make_bad_inode(inode); iput(inode); jffs2_free_raw_inode(ri); return ret; } dir_i->i_mtime = dir_i->i_ctime = ITIME(je32_to_cpu(ri->ctime)); jffs2_free_raw_inode(ri); d_instantiate(dentry, inode); D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n", inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages)); return 0; }
int jffs2_create(struct inode *dir_i, struct qstr *d_name, int mode, struct inode **new_i) { struct jffs2_raw_inode *ri; struct jffs2_inode_info *f, *dir_f; struct jffs2_sb_info *c; struct inode *inode; int ret; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; c = JFFS2_SB_INFO(dir_i->i_sb); D1(printk(KERN_DEBUG "jffs2_create()\n")); inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n")); jffs2_free_raw_inode(ri); return PTR_ERR(inode); } f = JFFS2_INODE_INFO(inode); dir_f = JFFS2_INODE_INFO(dir_i); ret = jffs2_do_create(c, dir_f, f, ri, d_name->name, d_name->len); if (ret) { jffs2_clear_inode(inode); make_bad_inode(inode); iput(inode); jffs2_free_raw_inode(ri); return ret; } jffs2_free_raw_inode(ri); D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d)\n", inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink)); *new_i = inode; return 0; }
int jffs2_mkdir (struct inode *dir_i, struct qstr *d_name, int mode, struct inode **new_i) { 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, phys_ofs; uint32_t writtenlen; 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 = d_name->len; ret = jffs2_reserve_space(c, sizeof(*ri), &phys_ofs, &alloclen, ALLOC_NORMAL); if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } f = JFFS2_INODE_INFO(inode); ri->data_crc = 0; ri->node_crc = crc32(0, ri, sizeof(*ri)-8); fn = jffs2_write_dnode(c, f, ri, NULL, 0, phys_ofs, &writtenlen); jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); 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); /* Work out where to put the dirent node now. */ writtenlen = PAD(writtenlen); phys_ofs += writtenlen; alloclen -= writtenlen; if (alloclen < sizeof(*rd)+namelen) { /* Not enough space left in this chunk. Get some more */ jffs2_complete_reservation(c); ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 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 = JFFS2_MAGIC_BITMASK; rd->nodetype = JFFS2_NODETYPE_DIRENT; rd->totlen = sizeof(*rd) + namelen; rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4); rd->pino = dir_i->i_ino; rd->version = ++dir_f->highest_version; rd->ino = inode->i_ino; rd->mctime = CURRENT_TIME; rd->nsize = namelen; rd->type = DT_DIR; rd->node_crc = crc32(0, rd, sizeof(*rd)-8); rd->name_crc = crc32(0, d_name->name, namelen); fd = jffs2_write_dirent(c, dir_f, rd, d_name->name, namelen, phys_ofs, &writtenlen); jffs2_complete_reservation(c); jffs2_free_raw_dirent(rd); if (IS_ERR(fd)) { /* dirent failed to write. Delete the inode normally as if it were the final unlink() */ up(&dir_f->sem); jffs2_clear_inode(inode); return PTR_ERR(fd); } /* 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); *new_i = inode; return 0; }
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; 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); 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 */ mutex_unlock(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } /* No data here. Only a metadata node, which will be obsoleted by the first data write */ f->metadata = fn; mutex_unlock(&f->sem); jffs2_complete_reservation(c); ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl_post(inode); 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); mutex_lock(&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); mutex_unlock(&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); mutex_unlock(&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; 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); 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; f = JFFS2_INODE_INFO(inode); /* Directories get nlink 2 at start */ inode->i_nlink = 2; /* but ic->pino_nlink is the parent ino# */ f->inocache->pino_nlink = dir_i->i_ino; 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 */ mutex_unlock(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } /* No data here. Only a metadata node, which will be obsoleted by the first data write */ f->metadata = fn; mutex_unlock(&f->sem); jffs2_complete_reservation(c); ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl_post(inode); 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); mutex_lock(&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); mutex_unlock(&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); mutex_unlock(&dir_f->sem); jffs2_complete_reservation(c); d_instantiate(dentry, inode); return 0; }
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target) { 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; int ret, targetlen = strlen(target); /* FIXME: If you care. We'd need to use frags for the target if it grows much more than this */ if (targetlen > 254) return -ENAMETOOLONG; 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) + targetlen, &alloclen, ALLOC_NORMAL, JFFS2_SUMMARY_INODE_SIZE); if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_symlink_inode_operations; f = JFFS2_INODE_INFO(inode); inode->i_size = targetlen; ri->isize = ri->dsize = ri->csize = cpu_to_je32(inode->i_size); ri->totlen = cpu_to_je32(sizeof(*ri) + inode->i_size); 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, target, targetlen)); ri->node_crc = cpu_to_je32(crc32(0, ri, sizeof(*ri)-8)); fn = jffs2_write_dnode(c, f, ri, target, targetlen, ALLOC_NORMAL); jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ mutex_unlock(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } /* We use f->target field to store the target path. */ f->target = kmalloc(targetlen + 1, GFP_KERNEL); if (!f->target) { printk(KERN_WARNING "Can't allocate %d bytes of memory\n", targetlen + 1); mutex_unlock(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return -ENOMEM; } memcpy(f->target, target, targetlen + 1); D1(printk(KERN_DEBUG "jffs2_symlink: symlink's target '%s' cached\n", (char *)f->target)); /* No data here. Only a metadata node, which will be obsoleted by the first data write */ f->metadata = fn; mutex_unlock(&f->sem); jffs2_complete_reservation(c); ret = jffs2_init_security(inode, dir_i); if (ret) { jffs2_clear_inode(inode); return ret; } ret = jffs2_init_acl_post(inode); 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); mutex_lock(&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_LNK; 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); mutex_unlock(&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); mutex_unlock(&dir_f->sem); jffs2_complete_reservation(c); d_instantiate(dentry, inode); return 0; }
static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, int 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; unsigned short dev; int devlen = 0; __u32 alloclen, phys_ofs; __u32 writtenlen; int ret; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; c = JFFS2_SB_INFO(dir_i->i_sb); if (S_ISBLK(mode) || S_ISCHR(mode)) { dev = (MAJOR(to_kdev_t(rdev)) << 8) | MINOR(to_kdev_t(rdev)); devlen = sizeof(dev); } /* 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, &phys_ofs, &alloclen, ALLOC_NORMAL); if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, mode, ri); 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 = devlen; ri->totlen = sizeof(*ri) + ri->csize; ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4); ri->compr = JFFS2_COMPR_NONE; ri->data_crc = crc32(0, &dev, devlen); ri->node_crc = crc32(0, ri, sizeof(*ri)-8); fn = jffs2_write_dnode(inode, ri, (char *)&dev, devlen, phys_ofs, &writtenlen); jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); 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); /* Work out where to put the dirent node now. */ writtenlen = (writtenlen+3)&~3; phys_ofs += writtenlen; alloclen -= writtenlen; if (alloclen < sizeof(*rd)+namelen) { /* Not enough space left in this chunk. Get some more */ jffs2_complete_reservation(c); ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 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 = JFFS2_MAGIC_BITMASK; rd->nodetype = JFFS2_NODETYPE_DIRENT; rd->totlen = sizeof(*rd) + namelen; rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4); rd->pino = dir_i->i_ino; rd->version = ++dir_f->highest_version; rd->ino = inode->i_ino; rd->mctime = CURRENT_TIME; rd->nsize = namelen; /* XXX: This is ugly. */ rd->type = (mode & S_IFMT) >> 12; rd->node_crc = crc32(0, rd, sizeof(*rd)-8); rd->name_crc = crc32(0, dentry->d_name.name, namelen); fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen); jffs2_complete_reservation(c); if (IS_ERR(fd)) { /* dirent failed to write. Delete the inode normally as if it were the final unlink() */ 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 = 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); d_instantiate(dentry, inode); return 0; }
static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char *target) { 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; __u32 alloclen, phys_ofs; __u32 writtenlen; int ret; /* FIXME: If you care. We'd need to use frags for the target if it grows much more than this */ if (strlen(target) > 254) return -EINVAL; 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) + strlen(target), &phys_ofs, &alloclen, ALLOC_NORMAL); if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, S_IFLNK | S_IRWXUGO, ri); if (IS_ERR(inode)) { jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_symlink_inode_operations; f = JFFS2_INODE_INFO(inode); inode->i_size = ri->isize = ri->dsize = ri->csize = strlen(target); ri->totlen = sizeof(*ri) + ri->dsize; ri->hdr_crc = crc32(0, ri, sizeof(struct jffs2_unknown_node)-4); ri->compr = JFFS2_COMPR_NONE; ri->data_crc = crc32(0, target, strlen(target)); ri->node_crc = crc32(0, ri, sizeof(*ri)-8); fn = jffs2_write_dnode(inode, ri, target, strlen(target), phys_ofs, &writtenlen); jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); 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); /* Work out where to put the dirent node now. */ writtenlen = (writtenlen+3)&~3; phys_ofs += writtenlen; alloclen -= writtenlen; if (alloclen < sizeof(*rd)+namelen) { /* Not enough space left in this chunk. Get some more */ jffs2_complete_reservation(c); ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); 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 = JFFS2_MAGIC_BITMASK; rd->nodetype = JFFS2_NODETYPE_DIRENT; rd->totlen = sizeof(*rd) + namelen; rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4); rd->pino = dir_i->i_ino; rd->version = ++dir_f->highest_version; rd->ino = inode->i_ino; rd->mctime = CURRENT_TIME; rd->nsize = namelen; rd->type = DT_LNK; rd->node_crc = crc32(0, rd, sizeof(*rd)-8); rd->name_crc = crc32(0, dentry->d_name.name, namelen); fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen); jffs2_complete_reservation(c); if (IS_ERR(fd)) { /* dirent failed to write. Delete the inode normally as if it were the final unlink() */ 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 = 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); d_instantiate(dentry, inode); return 0; }
static int jffs2_create(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; __u32 alloclen, phys_ofs; __u32 writtenlen; int ret; ri = jffs2_alloc_raw_inode(); if (!ri) return -ENOMEM; c = JFFS2_SB_INFO(dir_i->i_sb); D1(printk(KERN_DEBUG "jffs2_create()\n")); /* 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), &phys_ofs, &alloclen, ALLOC_NORMAL); D1(printk(KERN_DEBUG "jffs2_create(): reserved 0x%x bytes\n", alloclen)); if (ret) { jffs2_free_raw_inode(ri); return ret; } inode = jffs2_new_inode(dir_i, mode, ri); if (IS_ERR(inode)) { D1(printk(KERN_DEBUG "jffs2_new_inode() failed\n")); jffs2_free_raw_inode(ri); jffs2_complete_reservation(c); return PTR_ERR(inode); } inode->i_op = &jffs2_file_inode_operations; inode->i_fop = &jffs2_file_operations; inode->i_mapping->a_ops = &jffs2_file_address_operations; inode->i_mapping->nrpages = 0; f = JFFS2_INODE_INFO(inode); ri->data_crc = 0; ri->node_crc = crc32(0, ri, sizeof(*ri)-8); fn = jffs2_write_dnode(inode, ri, NULL, 0, phys_ofs, &writtenlen); D1(printk(KERN_DEBUG "jffs2_create created file with mode 0x%x\n", ri->mode)); jffs2_free_raw_inode(ri); if (IS_ERR(fn)) { D1(printk(KERN_DEBUG "jffs2_write_dnode() failed\n")); /* Eeek. Wave bye bye */ up(&f->sem); jffs2_complete_reservation(c); jffs2_clear_inode(inode); return PTR_ERR(fn); } /* No data here. Only a metadata node, which will be obsoleted by the first data write */ f->metadata = fn; /* Work out where to put the dirent node now. */ writtenlen = PAD(writtenlen); phys_ofs += writtenlen; alloclen -= writtenlen; up(&f->sem); if (alloclen < sizeof(*rd)+namelen) { /* Not enough space left in this chunk. Get some more */ jffs2_complete_reservation(c); ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &phys_ofs, &alloclen, ALLOC_NORMAL); if (ret) { /* Eep. */ D1(printk(KERN_DEBUG "jffs2_reserve_space() for dirent failed\n")); 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 = JFFS2_MAGIC_BITMASK; rd->nodetype = JFFS2_NODETYPE_DIRENT; rd->totlen = sizeof(*rd) + namelen; rd->hdr_crc = crc32(0, rd, sizeof(struct jffs2_unknown_node)-4); rd->pino = dir_i->i_ino; rd->version = ++dir_f->highest_version; rd->ino = inode->i_ino; rd->mctime = CURRENT_TIME; rd->nsize = namelen; rd->type = DT_REG; rd->node_crc = crc32(0, rd, sizeof(*rd)-8); rd->name_crc = crc32(0, dentry->d_name.name, namelen); fd = jffs2_write_dirent(dir_i, rd, dentry->d_name.name, namelen, phys_ofs, &writtenlen); jffs2_complete_reservation(c); if (IS_ERR(fd)) { /* dirent failed to write. Delete the inode normally as if it were the final unlink() */ 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 = 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); d_instantiate(dentry, inode); D1(printk(KERN_DEBUG "jffs2_create: Created ino #%lu with mode %o, nlink %d(%d). nrpages %ld\n", inode->i_ino, inode->i_mode, inode->i_nlink, f->inocache->nlink, inode->i_mapping->nrpages)); return 0; }