int jffs2_remount_fs (struct super_block *sb, int *flags, char *data) { struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); if (c->flags & JFFS2_SB_FLAG_RO && !(sb->s_flags & MS_RDONLY)) return -EROFS; /* We stop if it was running, then restart if it needs to. This also catches the case where it was stopped and this is just a remount to restart it. Flush the writebuffer, if neccecary, else we loose it */ if (!(sb->s_flags & MS_RDONLY)) { jffs2_stop_garbage_collect_thread(c); down(&c->alloc_sem); jffs2_flush_wbuf_pad(c); up(&c->alloc_sem); } if (!(*flags & MS_RDONLY)) jffs2_start_garbage_collect_thread(c); *flags |= MS_NOATIME; return 0; }
int jffs2_remount_fs (struct super_block *sb, int *flags, char *data) { struct jffs2_sb_info *c = JFFS2_SB_INFO(sb); if (c->flags & JFFS2_SB_FLAG_RO && !(sb->s_flags & MS_RDONLY)) return -EROFS; /* We stop if it was running, then restart if it needs to. This also catches the case where it was stopped and this is just a remount to restart it */ if (!(sb->s_flags & MS_RDONLY)) jffs2_stop_garbage_collect_thread(c); if (!(*flags & MS_RDONLY)) jffs2_start_garbage_collect_thread(c); sb->s_flags = (sb->s_flags & ~MS_RDONLY)|(*flags & MS_RDONLY); return 0; }
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) { struct jffs2_sb_info *c; struct inode *root_i; int ret; size_t blocks; c = JFFS2_SB_INFO(sb); #ifndef CONFIG_JFFS2_FS_WRITEBUFFER if (c->mtd->type == MTD_NANDFLASH) { printk(KERN_ERR "jffs2: Cannot operate on NAND flash unless jffs2 NAND support is compiled in.\n"); return -EINVAL; } if (c->mtd->type == MTD_DATAFLASH) { printk(KERN_ERR "jffs2: Cannot operate on DataFlash unless jffs2 DataFlash support is compiled in.\n"); return -EINVAL; } #endif c->flash_size = c->mtd->size; c->sector_size = c->mtd->erasesize; blocks = c->flash_size / c->sector_size; /* * Size alignment check */ if ((c->sector_size * blocks) != c->flash_size) { c->flash_size = c->sector_size * blocks; printk(KERN_INFO "jffs2: Flash size not aligned to erasesize, reducing to %dKiB\n", c->flash_size / 1024); } if (c->flash_size < 5*c->sector_size) { printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size); return -EINVAL; } c->cleanmarker_size = sizeof(struct jffs2_unknown_node); /* NAND (or other bizarre) flash... do setup accordingly */ ret = jffs2_flash_setup(c); if (ret) return ret; c->inocache_list = kmalloc(INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *), GFP_KERNEL); if (!c->inocache_list) { ret = -ENOMEM; goto out_wbuf; } memset(c->inocache_list, 0, INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *)); if ((ret = jffs2_do_mount_fs(c))) goto out_inohash; ret = -EINVAL; D1(printk(KERN_DEBUG "jffs2_do_fill_super(): Getting root inode\n")); root_i = iget(sb, 1); if (is_bad_inode(root_i)) { D1(printk(KERN_WARNING "get root inode failed\n")); goto out_root_i; } D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n")); sb->s_root = d_alloc_root(root_i); if (!sb->s_root) goto out_root_i; sb->s_maxbytes = 0xFFFFFFFF; sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = JFFS2_SUPER_MAGIC; if (!(sb->s_flags & MS_RDONLY)) jffs2_start_garbage_collect_thread(c); return 0; out_root_i: iput(root_i); jffs2_free_ino_caches(c); jffs2_free_raw_node_refs(c); if (jffs2_blocks_use_vmalloc(c)) vfree(c->blocks); else kfree(c->blocks); out_inohash: kfree(c->inocache_list); out_wbuf: jffs2_flash_cleanup(c); return ret; }
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) { struct jffs2_sb_info *c; struct inode *root_i; int ret; size_t blocks; c = JFFS2_SB_INFO(sb); c->flash_size = c->mtd->size; /* * Check, if we have to concatenate physical blocks to larger virtual blocks * to reduce the memorysize for c->blocks. (kmalloc allows max. 128K allocation) */ blocks = c->flash_size / c->mtd->erasesize; while ((blocks * sizeof (struct jffs2_eraseblock)) > (128 * 1024)) blocks >>= 1; c->sector_size = c->flash_size / blocks; if (c->sector_size != c->mtd->erasesize) printk(KERN_INFO "jffs2: Erase block size too small (%dKiB). Using virtual blocks size (%dKiB) instead\n", c->mtd->erasesize / 1024, c->sector_size / 1024); if (c->flash_size < 5*c->sector_size) { printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size); return -EINVAL; } c->cleanmarker_size = sizeof(struct jffs2_unknown_node); /* Joern -- stick alignment for weird 8-byte-page flash here */ if (jffs2_cleanmarker_oob(c)) { /* NAND (or other bizarre) flash... do setup accordingly */ ret = jffs2_nand_flash_setup(c); if (ret) return ret; } c->inocache_list = kmalloc(INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *), GFP_KERNEL); if (!c->inocache_list) { ret = -ENOMEM; goto out_wbuf; } memset(c->inocache_list, 0, INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *)); if ((ret = jffs2_do_mount_fs(c))) goto out_inohash; ret = -EINVAL; D1(printk(KERN_DEBUG "jffs2_do_fill_super(): Getting root inode\n")); root_i = iget(sb, 1); if (is_bad_inode(root_i)) { D1(printk(KERN_WARNING "get root inode failed\n")); goto out_nodes; } D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n")); sb->s_root = d_alloc_root(root_i); if (!sb->s_root) goto out_root_i; #if LINUX_VERSION_CODE >= 0x20403 sb->s_maxbytes = 0xFFFFFFFF; #endif sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = JFFS2_SUPER_MAGIC; if (!(sb->s_flags & MS_RDONLY)) jffs2_start_garbage_collect_thread(c); return 0; out_root_i: iput(root_i); out_nodes: jffs2_free_ino_caches(c); jffs2_free_raw_node_refs(c); kfree(c->blocks); out_inohash: kfree(c->inocache_list); out_wbuf: jffs2_nand_flash_cleanup(c); return ret; }
int jffs2_do_fill_super(struct super_block *sb, void *data, int silent) { struct jffs2_sb_info *c; struct inode *root_i; int ret; size_t blocks; c = JFFS2_SB_INFO(sb); c->flash_size = c->mtd->size; /* * Check, if we have to concatenate physical blocks to larger virtual blocks * to reduce the memorysize for c->blocks. (kmalloc allows max. 128K allocation) */ blocks = c->flash_size / c->mtd->erasesize; while ((blocks * sizeof (struct jffs2_eraseblock)) > (128 * 1024)) blocks >>= 1; c->sector_size = c->flash_size / blocks; if (c->sector_size != c->mtd->erasesize) printk(KERN_INFO "jffs2: Erase block size too small (%dKiB). Using virtual blocks size (%dKiB) instead\n", c->mtd->erasesize / 1024, c->sector_size / 1024); if (c->flash_size < 5*c->sector_size) { printk(KERN_ERR "jffs2: Too few erase blocks (%d)\n", c->flash_size / c->sector_size); return -EINVAL; } c->cleanmarker_size = sizeof(struct jffs2_unknown_node); /* Joern -- stick alignment for weird 8-byte-page flash here */ if (jffs2_cleanmarker_oob(c)) { /* Cleanmarker is out-of-band, so inline size zero */ c->cleanmarker_size = 0; } if (c->mtd->type == MTD_NANDFLASH) { /* Initialise write buffer */ c->wbuf_pagesize = c->mtd->oobblock; c->wbuf_ofs = 0xFFFFFFFF; c->wbuf = kmalloc(c->wbuf_pagesize, GFP_KERNEL); if (!c->wbuf) return -ENOMEM; /* Initialise process for timed wbuf flush */ INIT_WORK(&c->wbuf_task,(void*) jffs2_wbuf_process, (void *)c); /* Initialise timer for timed wbuf flush */ init_timer(&c->wbuf_timer); c->wbuf_timer.function = jffs2_wbuf_timeout; c->wbuf_timer.data = (unsigned long) c; } c->inocache_list = kmalloc(INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *), GFP_KERNEL); if (!c->inocache_list) { ret = -ENOMEM; goto out_wbuf; } memset(c->inocache_list, 0, INOCACHE_HASHSIZE * sizeof(struct jffs2_inode_cache *)); if ((ret = jffs2_do_mount_fs(c))) goto out_inohash; ret = -EINVAL; D1(printk(KERN_DEBUG "jffs2_do_fill_super(): Getting root inode\n")); root_i = iget(sb, 1); if (is_bad_inode(root_i)) { D1(printk(KERN_WARNING "get root inode failed\n")); goto out_nodes; } D1(printk(KERN_DEBUG "jffs2_do_fill_super(): d_alloc_root()\n")); sb->s_root = d_alloc_root(root_i); if (!sb->s_root) goto out_root_i; #if LINUX_VERSION_CODE >= 0x20403 sb->s_maxbytes = 0xFFFFFFFF; #endif sb->s_blocksize = PAGE_CACHE_SIZE; sb->s_blocksize_bits = PAGE_CACHE_SHIFT; sb->s_magic = JFFS2_SUPER_MAGIC; if (!(sb->s_flags & MS_RDONLY)) jffs2_start_garbage_collect_thread(c); return 0; out_root_i: iput(root_i); out_nodes: jffs2_free_ino_caches(c); jffs2_free_raw_node_refs(c); kfree(c->blocks); out_inohash: kfree(c->inocache_list); out_wbuf: if (c->wbuf) kfree(c->wbuf); return ret; }