diff options
Diffstat (limited to 'fs/exofs/mkexofs.c')
| -rw-r--r-- | fs/exofs/mkexofs.c | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/fs/exofs/mkexofs.c b/fs/exofs/mkexofs.c new file mode 100644 index 000000000000..8a2b3085a403 --- /dev/null +++ b/fs/exofs/mkexofs.c @@ -0,0 +1,606 @@ +/* + * mkexofs.c - make an exofs file system. + * + * Copyright (C) 2005, 2006 + * Avishay Traeger (avishay@gmail.com) (avishay@il.ibm.com) + * Copyright (C) 2005, 2006 + * International Business Machines + * Copyright (C) 2008, 2009 + * Boaz Harrosh <bharrosh@panasas.com> + * + * Copyrights from mke2fs.c: + * Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, + * 2003, 2004, 2005 by Theodore Ts'o. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "exofs.h" +#include <linux/random.h> + +/* #define __MKEXOFS_DEBUG_CHECKS 1 */ + +static int kick_it(struct osd_request *req, int timeout, uint8_t *cred_a, + const char *op) +{ + return exofs_sync_op(req, timeout, cred_a); +} + +/* Format the LUN to the specified size */ +static int format(uint64_t lun_capacity, struct osd_dev *dev, int timeout) +{ + struct osd_request *req = prepare_osd_format_lun(dev, lun_capacity); + uint8_t cred_a[OSD_CAP_LEN]; + int ret; + + exofs_make_credential(cred_a, 0, 0); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "format"); + + free_osd_req(req); + + return ret; +} + +static int create_partition(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + bool try_remove = false; + int ret; + + exofs_make_credential(cred_a, p_id, 0); + +create_part: + req = prepare_osd_create_partition(dev, p_id); + if (!req) + return -ENOMEM; + ret = kick_it(req, timeout, cred_a, "create partition"); + free_osd_req(req); + + if (ret && !try_remove) { + try_remove = true; + req = prepare_osd_remove_partition(dev, p_id); + if (!req) + return -ENOMEM; + ret = kick_it(req, timeout, cred_a, "remove partition"); + free_osd_req(req); + if (!ret) /* Try again now */ + goto create_part; + } + + return ret; +} + +#ifdef __MKEXOFS_DEBUG_CHECKS +static int list(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + unsigned char *buf = NULL; + int ret; + uint64_t total_matches; + uint64_t total_ret; + uint64_t *id_list; + int is_part, is_utd; + uint64_t cont; + uint32_t more; + int i; + + buf = kzalloc(1024, GFP_KERNEL); + if (!buf) { + EXOFS_ERR("ERROR: Failed to allocate memory.\n"); + return -ENOMEM; + } + + exofs_make_credential(cred_a, p_id, 0); + + req = prepare_osd_list(dev, p_id, 0, 1024, 0, 0, buf); + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "list"); + if (ret != 0) + goto out; + + ret = extract_list_from_req(req, &total_matches, &total_ret, &id_list, + &is_part, &is_utd, &cont, &more); + + EXOFS_DBGMSG("created %llu objects:\n", _LLU(total_ret)); + for (i = 0 ; i < total_ret ; i++) + EXOFS_DBGMSG("%llu\n", _LLU(id_list[i])); + +out: + free_osd_req(req); + kfree(buf); + + return ret; +} +#endif + +static int create(struct osd_dev *dev, uint64_t p_id, uint64_t o_id, + int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + int ret; + + exofs_make_credential(cred_a, p_id, o_id); + req = prepare_osd_create(dev, p_id, o_id); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "create"); + + free_osd_req(req); + + return ret; +} + +static int write_super(struct osd_dev *dev, uint64_t p_id, int timeout, + int newfile) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + struct exofs_fscb data; + int ret; + + exofs_make_credential(cred_a, p_id, EXOFS_SUPER_ID); + + data.s_nextid = cpu_to_le64(4); + data.s_magic = cpu_to_le16(EXOFS_SUPER_MAGIC); + data.s_newfs = 1; + if (newfile) + data.s_numfiles = cpu_to_le32(1); + else + data.s_numfiles = 0; + + req = prepare_osd_write(dev, p_id, EXOFS_SUPER_ID, + sizeof(struct exofs_fscb), 0, &data); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "write super"); + + free_osd_req(req); + + return ret; +} + +#ifdef __MKEXOFS_DEBUG_CHECKS +static int read_super(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + struct exofs_fscb data; + int ret; + + exofs_make_credential(cred_a, p_id, EXOFS_SUPER_ID); + + req = prepare_osd_read(dev, p_id, EXOFS_SUPER_ID, + sizeof(struct exofs_fscb), 0, 0, + (unsigned char *)(&data)); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "read super"); + if (ret) + goto out; + + EXOFS_DBGMSG("nextid:\t%u\n", le64_to_cpu(data.s_nextid)); + EXOFS_DBGMSG("magic:\t%u\n", le16_to_cpu(data.s_magic)); + EXOFS_DBGMSG("numfiles:\t%u\n", le32_to_cpu(data.s_numfiles)); +out: + free_osd_req(req); + + return ret; +} +#endif + +static int write_bitmap(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + uint64_t off = 0; + unsigned int id = 3; + int ret; + + /* XXX: For now just use counter - later make bitmap */ + exofs_make_credential(cred_a, p_id, EXOFS_BM_ID); + + req = prepare_osd_write(dev, p_id, EXOFS_BM_ID, sizeof(unsigned int), + off, &id); + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "write bitmap"); + + free_osd_req(req); + + return ret; +} + +#ifdef __MKEXOFS_DEBUG_CHECKS +static int write_testfile(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + uint64_t off = 0; + unsigned char buf[64]; + int ret; + + strcpy((char *)buf, "This file is a test, it is only a test."); + exofs_make_credential(cred_a, p_id, EXOFS_TEST_ID); + + req = prepare_osd_write(dev, p_id, EXOFS_TEST_ID, 64, off, 0, buf); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "write bitmap"); + + free_osd_req(req); + + return ret; +} + +static int read_testfile(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + unsigned char data[64]; + int ret; + + exofs_make_credential(cred_a, p_id, EXOFS_TEST_ID); + + req = prepare_osd_read(dev, p_id, EXOFS_TEST_ID, 64, 0, 0, data); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "read test file"); + if (ret) + goto out; + + EXOFS_DBGMSG("test file: %s\n", data); + +out: + free_osd_req(req); + + return ret; +} +#endif + +static int write_rootdir(struct osd_dev *dev, uint64_t p_id, int timeout, + int newfile) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + struct exofs_dir_entry *dir; + uint64_t off = 0; + unsigned char *buf = NULL; + int filetype = EXOFS_FT_DIR << 8; + int filetype2 = EXOFS_FT_REG_FILE << 8; + int rec_len; + int done; + int ret; + + buf = kzalloc(EXOFS_BLKSIZE, GFP_KERNEL); + if (!buf) { + EXOFS_ERR("ERROR: Failed to allocate memory.\n"); + return -ENOMEM; + } + dir = (struct exofs_dir_entry *)buf; + + /* create entry for '.' */ + dir->name[0] = '.'; + dir->name_len = 1 | filetype; + dir->inode_no = cpu_to_le64(EXOFS_ROOT_ID - EXOFS_OBJ_OFF); + dir->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(1)); + rec_len = EXOFS_BLKSIZE - EXOFS_DIR_REC_LEN(1); + + /* create entry for '..' */ + dir = (struct exofs_dir_entry *) (buf + le16_to_cpu(dir->rec_len)); + dir->name[0] = '.'; + dir->name[1] = '.'; + dir->name_len = 2 | filetype; + dir->inode_no = cpu_to_le64(EXOFS_ROOT_ID - EXOFS_OBJ_OFF); + if (newfile) { + rec_len -= EXOFS_DIR_REC_LEN(2); + dir->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(2)); + } else + dir->rec_len = cpu_to_le16(rec_len); + done = EXOFS_DIR_REC_LEN(1) + le16_to_cpu(dir->rec_len); + + /* create entry for 'test', if specified */ + if (newfile) { + dir = (struct exofs_dir_entry *) (buf + done); + dir->inode_no = cpu_to_le64(EXOFS_TEST_ID - EXOFS_OBJ_OFF); + dir->name_len = 4 | filetype2; + dir->name[0] = 't'; + dir->name[1] = 'e'; + dir->name[2] = 's'; + dir->name[3] = 't'; + dir->rec_len = cpu_to_le16(rec_len); + } + + exofs_make_credential(cred_a, p_id, EXOFS_ROOT_ID); + + req = prepare_osd_write(dev, p_id, EXOFS_ROOT_ID, EXOFS_BLKSIZE, off, + buf); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + ret = kick_it(req, timeout, cred_a, "write rootdir"); + + free_osd_req(req); + + return ret; +} + +static int set_inode(struct osd_dev *dev, uint64_t p_id, int timeout, + uint64_t o_id, uint16_t mode) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + struct exofs_fcb in = {0}; + struct exofs_fcb *inode = ∈ + uint32_t i_generation; + int ret; + + inode->i_mode = cpu_to_le16(mode); + inode->i_uid = inode->i_gid = 0; + inode->i_links_count = cpu_to_le16(2); + inode->i_ctime = inode->i_atime = inode->i_mtime = + (signed)cpu_to_le32(CURRENT_TIME.tv_sec); + inode->i_size = cpu_to_le64(EXOFS_BLKSIZE); + if (o_id != EXOFS_ROOT_ID) + inode->i_size = cpu_to_le64(64); + + get_random_bytes(&i_generation, sizeof(i_generation)); + inode->i_generation = cpu_to_le32(i_generation); + + exofs_make_credential(cred_a, p_id, o_id); + + req = prepare_osd_set_attr(dev, p_id, o_id); + + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + prepare_set_attr_list_add_entry(req, + OSD_PAGE_NUM_IBM_UOBJ_FS_DATA, + OSD_ATTR_NUM_IBM_UOBJ_FS_DATA_INODE, + EXOFS_INO_ATTR_SIZE, (u8 *)inode); + + ret = kick_it(req, timeout, cred_a, "set inode"); + + free_osd_req(req); + + return ret; +} + +#ifdef __MKEXOFS_DEBUG_CHECKS +static int get_root_attr(struct osd_dev *dev, uint64_t p_id, int timeout) +{ + struct osd_request *req; + uint8_t cred_a[OSD_CAP_LEN]; + struct exofs_fcb in = {0}; + struct exofs_fcb *inode = ∈ + uint32_t attr_page = OSD_PAGE_NUM_IBM_UOBJ_FS_DATA; + uint32_t attr_id = OSD_ATTR_NUM_IBM_UOBJ_FS_DATA_INODE; + uint16_t expected = EXOFS_INO_ATTR_SIZE; + uint8_t *buf; + int ret; + + exofs_make_credential(cred_a, p_id, EXOFS_ROOT_ID); + + req = prepare_osd_get_attr(dev, p_id, EXOFS_ROOT_ID); + if (req == NULL) { + EXOFS_ERR("ERROR: Failed to allocate request.\n"); + return -ENOMEM; + } + + prepare_get_attr_list_add_entry(req, + OSD_PAGE_NUM_IBM_UOBJ_FS_DATA, + OSD_ATTR_NUM_IBM_UOBJ_FS_DATA_INODE, + EXOFS_INO_ATTR_SIZE); + + ret = kick_it(req, timeout, cred_a, "get root inode"); + if (ret) + goto out; + + ret = extract_next_attr_from_req(req, &attr_page, &attr_id, &expected, + &buf); + if (ret) { + EXOFS_ERR("ERROR: extract attr from req failed\n"); + goto out; + } + + memcpy(inode, buf, sizeof(struct exofs_fcb)); + + EXOFS_DBGMSG("mode: %u\n", le16_to_cpu(inode->i_mode)); + EXOFS_DBGMSG("uid: %u\n", le32_to_cpu(inode->i_uid)); + EXOFS_DBGMSG("gid: %u\n", le32_to_cpu(inode->i_gid)); + EXOFS_DBGMSG("links: %u\n", le16_to_cpu(inode->i_links_count)); + EXOFS_DBGMSG("ctime: %u\n", le32_to_cpu(inode->i_ctime)); + EXOFS_DBGMSG("atime: %u\n", le32_to_cpu(inode->i_atime)); + EXOFS_DBGMSG("mtime: %u\n", le32_to_cpu(inode->i_mtime)); + EXOFS_DBGMSG("gen: %u\n", le32_to_cpu(inode->i_generation)); + EXOFS_DBGMSG("size: %llu\n", _LLU(le64_to_cpu(inode->i_size))); + +out: + free_osd_req(req); + + return ret; +} +#endif + +/* + * This function creates an exofs file system on the specified OSD partition. + */ +int exofs_mkfs(struct osd_dev *dev, uint64_t p_id, uint64_t format_size_meg) +{ + int err; + const int to_format = (4 * 60 * HZ); + const int to_gen = (60 * HZ); + bool newfile = false; + + /* Get a handle */ + EXOFS_DBGMSG("setting up exofs on partition %llu:\n", _LLU(p_id)); + + /* Format LUN if requested */ + if (format_size_meg > 0) { + EXOFS_DBGMSG("formatting %llu Mgb...\n", _LLU(format_size_meg)); + err = format(format_size_meg * 1024 * 1024, dev, to_format); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + } + + /* Create partition */ + EXOFS_DBGMSG("creating partition...\n"); + err = create_partition(dev, p_id, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + + /* Create object with known ID for superblock info */ + EXOFS_DBGMSG("creating superblock...\n"); + err = create(dev, p_id, EXOFS_SUPER_ID, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + + /* Create root directory object */ + EXOFS_DBGMSG("creating root directory...\n"); + err = create(dev, p_id, EXOFS_ROOT_ID, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + + /* Create bitmap object */ + EXOFS_DBGMSG("creating free ID bitmap...\n"); + err = create(dev, p_id, EXOFS_BM_ID, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + +#ifdef __MKEXOFS_DEBUG_CHECKS + /* Create a test file, if specified by options */ + if (newfile) { + EXOFS_DBGMSG("creating test file...\n"); + err = create(dev, p_id, EXOFS_TEST_ID, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + } +#endif + + /* Write superblock */ + EXOFS_DBGMSG("writing superblock...\n"); + err = write_super(dev, p_id, to_gen, newfile); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + + /* Write root directory */ + EXOFS_DBGMSG("writing root directory...\n"); + err = write_rootdir(dev, p_id, to_gen, newfile); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + + /* Set root partition inode attribute */ + EXOFS_DBGMSG("writing root inode...\n"); + err = set_inode(dev, p_id, to_gen, EXOFS_ROOT_ID, + 0040000 | (0777 & ~022)); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + +#ifdef __MKEXOFS_DEBUG_CHECKS + /* Set test file inode attribute */ + if (newfile) { + EXOFS_DBGMSG("writing test inode...\n"); + err = set_inode(dev, p_id, to_gen, EXOFS_TEST_ID, + 0100000 | (0777 & ~022)); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + } +#endif + /* Write bitmap */ + EXOFS_DBGMSG("writing free ID bitmap...\n"); + err = write_bitmap(dev, p_id, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + +#ifdef __MKEXOFS_DEBUG_CHECKS + /* Write test file */ + if (newfile) { + EXOFS_DBGMSG("writing test file...\n"); + err = write_testfile(dev, p_id, to_gen); + if (err) + goto out; + EXOFS_DBGMSG(" OK\n"); + } + + /* some debug info */ + { + EXOFS_DBGMSG("listing:\n"); + list(dev, p_id, to_gen); + EXOFS_DBGMSG("contents of superblock:\n"); + read_super(dev, p_id, to_gen); + EXOFS_DBGMSG("contents of root inode:\n"); + get_root_attr(dev, p_id, to_gen); + if (newfile) { + EXOFS_DBGMSG("contents of test file:\n"); + read_testfile(dev, p_id, to_gen); + } + } +#endif + EXOFS_DBGMSG("\nsetup complete: enjoy your shiny new exofs!\n"); + +out: + return err; +} |