| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Copyright (C) International Business Machines Corp., 2000-2004 |
| * Portions Copyright (C) Christoph Hellwig, 2001-2002 |
| */ |
| |
| #include <linux/fs.h> |
| #include <linux/module.h> |
| #include <linux/parser.h> |
| #include <linux/completion.h> |
| #include <linux/vfs.h> |
| #include <linux/quotaops.h> |
| #include <linux/mount.h> |
| #include <linux/moduleparam.h> |
| #include <linux/kthread.h> |
| #include <linux/posix_acl.h> |
| #include <linux/buffer_head.h> |
| #include <linux/exportfs.h> |
| #include <linux/crc32.h> |
| #include <linux/slab.h> |
| #include <linux/uaccess.h> |
| #include <linux/seq_file.h> |
| #include <linux/blkdev.h> |
| |
| #include "jfs_incore.h" |
| #include "jfs_filsys.h" |
| #include "jfs_inode.h" |
| #include "jfs_metapage.h" |
| #include "jfs_superblock.h" |
| #include "jfs_dmap.h" |
| #include "jfs_imap.h" |
| #include "jfs_acl.h" |
| #include "jfs_debug.h" |
| #include "jfs_xattr.h" |
| #include "jfs_dinode.h" |
| |
| MODULE_DESCRIPTION("The Journaled Filesystem (JFS)"); |
| MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM"); |
| MODULE_LICENSE("GPL"); |
| |
| static struct kmem_cache *jfs_inode_cachep; |
| |
| static const struct super_operations jfs_super_operations; |
| static const struct export_operations jfs_export_operations; |
| static struct file_system_type jfs_fs_type; |
| |
| #define MAX_COMMIT_THREADS 64 |
| static int commit_threads; |
| module_param(commit_threads, int, 0); |
| MODULE_PARM_DESC(commit_threads, "Number of commit threads"); |
| |
| static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS]; |
| struct task_struct *jfsIOthread; |
| struct task_struct *jfsSyncThread; |
| |
| #ifdef CONFIG_JFS_DEBUG |
| int jfsloglevel = JFS_LOGLEVEL_WARN; |
| module_param(jfsloglevel, int, 0644); |
| MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)"); |
| #endif |
| |
| static void jfs_handle_error(struct super_block *sb) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(sb); |
| |
| if (sb_rdonly(sb)) |
| return; |
| |
| updateSuper(sb, FM_DIRTY); |
| |
| if (sbi->flag & JFS_ERR_PANIC) |
| panic("JFS (device %s): panic forced after error\n", |
| sb->s_id); |
| else if (sbi->flag & JFS_ERR_REMOUNT_RO) { |
| jfs_err("ERROR: (device %s): remounting filesystem as read-only", |
| sb->s_id); |
| sb->s_flags |= SB_RDONLY; |
| } |
| |
| /* nothing is done for continue beyond marking the superblock dirty */ |
| } |
| |
| void jfs_error(struct super_block *sb, const char *fmt, ...) |
| { |
| struct va_format vaf; |
| va_list args; |
| |
| va_start(args, fmt); |
| |
| vaf.fmt = fmt; |
| vaf.va = &args; |
| |
| pr_err("ERROR: (device %s): %ps: %pV\n", |
| sb->s_id, __builtin_return_address(0), &vaf); |
| |
| va_end(args); |
| |
| jfs_handle_error(sb); |
| } |
| |
| static struct inode *jfs_alloc_inode(struct super_block *sb) |
| { |
| struct jfs_inode_info *jfs_inode; |
| |
| jfs_inode = alloc_inode_sb(sb, jfs_inode_cachep, GFP_NOFS); |
| if (!jfs_inode) |
| return NULL; |
| #ifdef CONFIG_QUOTA |
| memset(&jfs_inode->i_dquot, 0, sizeof(jfs_inode->i_dquot)); |
| #endif |
| return &jfs_inode->vfs_inode; |
| } |
| |
| static void jfs_free_inode(struct inode *inode) |
| { |
| kmem_cache_free(jfs_inode_cachep, JFS_IP(inode)); |
| } |
| |
| static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb); |
| s64 maxinodes; |
| struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap; |
| |
| jfs_info("In jfs_statfs"); |
| buf->f_type = JFS_SUPER_MAGIC; |
| buf->f_bsize = sbi->bsize; |
| buf->f_blocks = sbi->bmap->db_mapsize; |
| buf->f_bfree = sbi->bmap->db_nfree; |
| buf->f_bavail = sbi->bmap->db_nfree; |
| /* |
| * If we really return the number of allocated & free inodes, some |
| * applications will fail because they won't see enough free inodes. |
| * We'll try to calculate some guess as to how many inodes we can |
| * really allocate |
| * |
| * buf->f_files = atomic_read(&imap->im_numinos); |
| * buf->f_ffree = atomic_read(&imap->im_numfree); |
| */ |
| maxinodes = min((s64) atomic_read(&imap->im_numinos) + |
| ((sbi->bmap->db_nfree >> imap->im_l2nbperiext) |
| << L2INOSPEREXT), (s64) 0xffffffffLL); |
| buf->f_files = maxinodes; |
| buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) - |
| atomic_read(&imap->im_numfree)); |
| buf->f_fsid.val[0] = crc32_le(0, (char *)&sbi->uuid, |
| sizeof(sbi->uuid)/2); |
| buf->f_fsid.val[1] = crc32_le(0, |
| (char *)&sbi->uuid + sizeof(sbi->uuid)/2, |
| sizeof(sbi->uuid)/2); |
| |
| buf->f_namelen = JFS_NAME_MAX; |
| return 0; |
| } |
| |
| #ifdef CONFIG_QUOTA |
| static int jfs_quota_off(struct super_block *sb, int type); |
| static int jfs_quota_on(struct super_block *sb, int type, int format_id, |
| const struct path *path); |
| |
| static void jfs_quota_off_umount(struct super_block *sb) |
| { |
| int type; |
| |
| for (type = 0; type < MAXQUOTAS; type++) |
| jfs_quota_off(sb, type); |
| } |
| |
| static const struct quotactl_ops jfs_quotactl_ops = { |
| .quota_on = jfs_quota_on, |
| .quota_off = jfs_quota_off, |
| .quota_sync = dquot_quota_sync, |
| .get_state = dquot_get_state, |
| .set_info = dquot_set_dqinfo, |
| .get_dqblk = dquot_get_dqblk, |
| .set_dqblk = dquot_set_dqblk, |
| .get_nextdqblk = dquot_get_next_dqblk, |
| }; |
| #else |
| static inline void jfs_quota_off_umount(struct super_block *sb) |
| { |
| } |
| #endif |
| |
| static void jfs_put_super(struct super_block *sb) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(sb); |
| int rc; |
| |
| jfs_info("In jfs_put_super"); |
| |
| jfs_quota_off_umount(sb); |
| |
| rc = jfs_umount(sb); |
| if (rc) |
| jfs_err("jfs_umount failed with return code %d", rc); |
| |
| unload_nls(sbi->nls_tab); |
| |
| truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
| iput(sbi->direct_inode); |
| |
| kfree(sbi); |
| } |
| |
| enum { |
| Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize, |
| Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota, |
| Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask, |
| Opt_discard, Opt_nodiscard, Opt_discard_minblk |
| }; |
| |
| static const match_table_t tokens = { |
| {Opt_integrity, "integrity"}, |
| {Opt_nointegrity, "nointegrity"}, |
| {Opt_iocharset, "iocharset=%s"}, |
| {Opt_resize, "resize=%u"}, |
| {Opt_resize_nosize, "resize"}, |
| {Opt_errors, "errors=%s"}, |
| {Opt_ignore, "noquota"}, |
| {Opt_quota, "quota"}, |
| {Opt_usrquota, "usrquota"}, |
| {Opt_grpquota, "grpquota"}, |
| {Opt_uid, "uid=%u"}, |
| {Opt_gid, "gid=%u"}, |
| {Opt_umask, "umask=%u"}, |
| {Opt_discard, "discard"}, |
| {Opt_nodiscard, "nodiscard"}, |
| {Opt_discard_minblk, "discard=%u"}, |
| {Opt_err, NULL} |
| }; |
| |
| static int parse_options(char *options, struct super_block *sb, s64 *newLVSize, |
| int *flag) |
| { |
| void *nls_map = (void *)-1; /* -1: no change; NULL: none */ |
| char *p; |
| struct jfs_sb_info *sbi = JFS_SBI(sb); |
| |
| *newLVSize = 0; |
| |
| if (!options) |
| return 1; |
| |
| while ((p = strsep(&options, ",")) != NULL) { |
| substring_t args[MAX_OPT_ARGS]; |
| int token; |
| if (!*p) |
| continue; |
| |
| token = match_token(p, tokens, args); |
| switch (token) { |
| case Opt_integrity: |
| *flag &= ~JFS_NOINTEGRITY; |
| break; |
| case Opt_nointegrity: |
| *flag |= JFS_NOINTEGRITY; |
| break; |
| case Opt_ignore: |
| /* Silently ignore the quota options */ |
| /* Don't do anything ;-) */ |
| break; |
| case Opt_iocharset: |
| if (nls_map && nls_map != (void *) -1) |
| unload_nls(nls_map); |
| if (!strcmp(args[0].from, "none")) |
| nls_map = NULL; |
| else { |
| nls_map = load_nls(args[0].from); |
| if (!nls_map) { |
| pr_err("JFS: charset not found\n"); |
| goto cleanup; |
| } |
| } |
| break; |
| case Opt_resize: |
| { |
| char *resize = args[0].from; |
| int rc = kstrtoll(resize, 0, newLVSize); |
| |
| if (rc) |
| goto cleanup; |
| break; |
| } |
| case Opt_resize_nosize: |
| { |
| *newLVSize = sb_bdev_nr_blocks(sb); |
| if (*newLVSize == 0) |
| pr_err("JFS: Cannot determine volume size\n"); |
| break; |
| } |
| case Opt_errors: |
| { |
| char *errors = args[0].from; |
| if (!errors || !*errors) |
| goto cleanup; |
| if (!strcmp(errors, "continue")) { |
| *flag &= ~JFS_ERR_REMOUNT_RO; |
| *flag &= ~JFS_ERR_PANIC; |
| *flag |= JFS_ERR_CONTINUE; |
| } else if (!strcmp(errors, "remount-ro")) { |
| *flag &= ~JFS_ERR_CONTINUE; |
| *flag &= ~JFS_ERR_PANIC; |
| *flag |= JFS_ERR_REMOUNT_RO; |
| } else if (!strcmp(errors, "panic")) { |
| *flag &= ~JFS_ERR_CONTINUE; |
| *flag &= ~JFS_ERR_REMOUNT_RO; |
| *flag |= JFS_ERR_PANIC; |
| } else { |
| pr_err("JFS: %s is an invalid error handler\n", |
| errors); |
| goto cleanup; |
| } |
| break; |
| } |
| |
| #ifdef CONFIG_QUOTA |
| case Opt_quota: |
| case Opt_usrquota: |
| *flag |= JFS_USRQUOTA; |
| break; |
| case Opt_grpquota: |
| *flag |= JFS_GRPQUOTA; |
| break; |
| #else |
| case Opt_usrquota: |
| case Opt_grpquota: |
| case Opt_quota: |
| pr_err("JFS: quota operations not supported\n"); |
| break; |
| #endif |
| case Opt_uid: |
| { |
| char *uid = args[0].from; |
| uid_t val; |
| int rc = kstrtouint(uid, 0, &val); |
| |
| if (rc) |
| goto cleanup; |
| sbi->uid = make_kuid(current_user_ns(), val); |
| if (!uid_valid(sbi->uid)) |
| goto cleanup; |
| break; |
| } |
| |
| case Opt_gid: |
| { |
| char *gid = args[0].from; |
| gid_t val; |
| int rc = kstrtouint(gid, 0, &val); |
| |
| if (rc) |
| goto cleanup; |
| sbi->gid = make_kgid(current_user_ns(), val); |
| if (!gid_valid(sbi->gid)) |
| goto cleanup; |
| break; |
| } |
| |
| case Opt_umask: |
| { |
| char *umask = args[0].from; |
| int rc = kstrtouint(umask, 8, &sbi->umask); |
| |
| if (rc) |
| goto cleanup; |
| if (sbi->umask & ~0777) { |
| pr_err("JFS: Invalid value of umask\n"); |
| goto cleanup; |
| } |
| break; |
| } |
| |
| case Opt_discard: |
| /* if set to 1, even copying files will cause |
| * trimming :O |
| * -> user has more control over the online trimming |
| */ |
| sbi->minblks_trim = 64; |
| if (bdev_max_discard_sectors(sb->s_bdev)) |
| *flag |= JFS_DISCARD; |
| else |
| pr_err("JFS: discard option not supported on device\n"); |
| break; |
| |
| case Opt_nodiscard: |
| *flag &= ~JFS_DISCARD; |
| break; |
| |
| case Opt_discard_minblk: |
| { |
| char *minblks_trim = args[0].from; |
| int rc; |
| if (bdev_max_discard_sectors(sb->s_bdev)) { |
| *flag |= JFS_DISCARD; |
| rc = kstrtouint(minblks_trim, 0, |
| &sbi->minblks_trim); |
| if (rc) |
| goto cleanup; |
| } else |
| pr_err("JFS: discard option not supported on device\n"); |
| break; |
| } |
| |
| default: |
| printk("jfs: Unrecognized mount option \"%s\" or missing value\n", |
| p); |
| goto cleanup; |
| } |
| } |
| |
| if (nls_map != (void *) -1) { |
| /* Discard old (if remount) */ |
| unload_nls(sbi->nls_tab); |
| sbi->nls_tab = nls_map; |
| } |
| return 1; |
| |
| cleanup: |
| if (nls_map && nls_map != (void *) -1) |
| unload_nls(nls_map); |
| return 0; |
| } |
| |
| static int jfs_remount(struct super_block *sb, int *flags, char *data) |
| { |
| s64 newLVSize = 0; |
| int rc = 0; |
| int flag = JFS_SBI(sb)->flag; |
| int ret; |
| |
| sync_filesystem(sb); |
| if (!parse_options(data, sb, &newLVSize, &flag)) |
| return -EINVAL; |
| |
| if (newLVSize) { |
| if (sb_rdonly(sb)) { |
| pr_err("JFS: resize requires volume to be mounted read-write\n"); |
| return -EROFS; |
| } |
| rc = jfs_extendfs(sb, newLVSize, 0); |
| if (rc) |
| return rc; |
| } |
| |
| if (sb_rdonly(sb) && !(*flags & SB_RDONLY)) { |
| /* |
| * Invalidate any previously read metadata. fsck may have |
| * changed the on-disk data since we mounted r/o |
| */ |
| truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0); |
| |
| JFS_SBI(sb)->flag = flag; |
| ret = jfs_mount_rw(sb, 1); |
| |
| /* mark the fs r/w for quota activity */ |
| sb->s_flags &= ~SB_RDONLY; |
| |
| dquot_resume(sb, -1); |
| return ret; |
| } |
| if (!sb_rdonly(sb) && (*flags & SB_RDONLY)) { |
| rc = dquot_suspend(sb, -1); |
| if (rc < 0) |
| return rc; |
| rc = jfs_umount_rw(sb); |
| JFS_SBI(sb)->flag = flag; |
| return rc; |
| } |
| if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY)) |
| if (!sb_rdonly(sb)) { |
| rc = jfs_umount_rw(sb); |
| if (rc) |
| return rc; |
| |
| JFS_SBI(sb)->flag = flag; |
| ret = jfs_mount_rw(sb, 1); |
| return ret; |
| } |
| JFS_SBI(sb)->flag = flag; |
| |
| return 0; |
| } |
| |
| static int jfs_fill_super(struct super_block *sb, void *data, int silent) |
| { |
| struct jfs_sb_info *sbi; |
| struct inode *inode; |
| int rc; |
| s64 newLVSize = 0; |
| int flag, ret = -EINVAL; |
| |
| jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags); |
| |
| sbi = kzalloc(sizeof(struct jfs_sb_info), GFP_KERNEL); |
| if (!sbi) |
| return -ENOMEM; |
| |
| sb->s_fs_info = sbi; |
| sb->s_max_links = JFS_LINK_MAX; |
| sb->s_time_min = 0; |
| sb->s_time_max = U32_MAX; |
| sbi->sb = sb; |
| sbi->uid = INVALID_UID; |
| sbi->gid = INVALID_GID; |
| sbi->umask = -1; |
| |
| /* initialize the mount flag and determine the default error handler */ |
| flag = JFS_ERR_REMOUNT_RO; |
| |
| if (!parse_options((char *) data, sb, &newLVSize, &flag)) |
| goto out_kfree; |
| sbi->flag = flag; |
| |
| #ifdef CONFIG_JFS_POSIX_ACL |
| sb->s_flags |= SB_POSIXACL; |
| #endif |
| |
| if (newLVSize) { |
| pr_err("resize option for remount only\n"); |
| goto out_kfree; |
| } |
| |
| /* |
| * Initialize blocksize to 4K. |
| */ |
| sb_set_blocksize(sb, PSIZE); |
| |
| /* |
| * Set method vectors. |
| */ |
| sb->s_op = &jfs_super_operations; |
| sb->s_export_op = &jfs_export_operations; |
| sb->s_xattr = jfs_xattr_handlers; |
| #ifdef CONFIG_QUOTA |
| sb->dq_op = &dquot_operations; |
| sb->s_qcop = &jfs_quotactl_ops; |
| sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
| #endif |
| |
| /* |
| * Initialize direct-mapping inode/address-space |
| */ |
| inode = new_inode(sb); |
| if (inode == NULL) { |
| ret = -ENOMEM; |
| goto out_unload; |
| } |
| inode->i_size = bdev_nr_bytes(sb->s_bdev); |
| inode->i_mapping->a_ops = &jfs_metapage_aops; |
| inode_fake_hash(inode); |
| mapping_set_gfp_mask(inode->i_mapping, GFP_NOFS); |
| |
| sbi->direct_inode = inode; |
| |
| rc = jfs_mount(sb); |
| if (rc) { |
| if (!silent) |
| jfs_err("jfs_mount failed w/return code = %d", rc); |
| goto out_mount_failed; |
| } |
| if (sb_rdonly(sb)) |
| sbi->log = NULL; |
| else { |
| rc = jfs_mount_rw(sb, 0); |
| if (rc) { |
| if (!silent) { |
| jfs_err("jfs_mount_rw failed, return code = %d", |
| rc); |
| } |
| goto out_no_rw; |
| } |
| } |
| |
| sb->s_magic = JFS_SUPER_MAGIC; |
| |
| if (sbi->mntflag & JFS_OS2) |
| sb->s_d_op = &jfs_ci_dentry_operations; |
| |
| inode = jfs_iget(sb, ROOT_I); |
| if (IS_ERR(inode)) { |
| ret = PTR_ERR(inode); |
| goto out_no_rw; |
| } |
| sb->s_root = d_make_root(inode); |
| if (!sb->s_root) |
| goto out_no_root; |
| |
| /* logical blocks are represented by 40 bits in pxd_t, etc. |
| * and page cache is indexed by long |
| */ |
| sb->s_maxbytes = min(((loff_t)sb->s_blocksize) << 40, MAX_LFS_FILESIZE); |
| sb->s_time_gran = 1; |
| return 0; |
| |
| out_no_root: |
| jfs_err("jfs_read_super: get root dentry failed"); |
| |
| out_no_rw: |
| rc = jfs_umount(sb); |
| if (rc) |
| jfs_err("jfs_umount failed with return code %d", rc); |
| out_mount_failed: |
| filemap_write_and_wait(sbi->direct_inode->i_mapping); |
| truncate_inode_pages(sbi->direct_inode->i_mapping, 0); |
| make_bad_inode(sbi->direct_inode); |
| iput(sbi->direct_inode); |
| sbi->direct_inode = NULL; |
| out_unload: |
| unload_nls(sbi->nls_tab); |
| out_kfree: |
| kfree(sbi); |
| return ret; |
| } |
| |
| static int jfs_freeze(struct super_block *sb) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(sb); |
| struct jfs_log *log = sbi->log; |
| int rc = 0; |
| |
| if (!sb_rdonly(sb)) { |
| txQuiesce(sb); |
| rc = lmLogShutdown(log); |
| if (rc) { |
| jfs_error(sb, "lmLogShutdown failed\n"); |
| |
| /* let operations fail rather than hang */ |
| txResume(sb); |
| |
| return rc; |
| } |
| rc = updateSuper(sb, FM_CLEAN); |
| if (rc) { |
| jfs_err("jfs_freeze: updateSuper failed"); |
| /* |
| * Don't fail here. Everything succeeded except |
| * marking the superblock clean, so there's really |
| * no harm in leaving it frozen for now. |
| */ |
| } |
| } |
| return 0; |
| } |
| |
| static int jfs_unfreeze(struct super_block *sb) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(sb); |
| struct jfs_log *log = sbi->log; |
| int rc = 0; |
| |
| if (!sb_rdonly(sb)) { |
| rc = updateSuper(sb, FM_MOUNT); |
| if (rc) { |
| jfs_error(sb, "updateSuper failed\n"); |
| goto out; |
| } |
| rc = lmLogInit(log); |
| if (rc) |
| jfs_error(sb, "lmLogInit failed\n"); |
| out: |
| txResume(sb); |
| } |
| return rc; |
| } |
| |
| static struct dentry *jfs_do_mount(struct file_system_type *fs_type, |
| int flags, const char *dev_name, void *data) |
| { |
| return mount_bdev(fs_type, flags, dev_name, data, jfs_fill_super); |
| } |
| |
| static int jfs_sync_fs(struct super_block *sb, int wait) |
| { |
| struct jfs_log *log = JFS_SBI(sb)->log; |
| |
| /* log == NULL indicates read-only mount */ |
| if (log) { |
| /* |
| * Write quota structures to quota file, sync_blockdev() will |
| * write them to disk later |
| */ |
| dquot_writeback_dquots(sb, -1); |
| jfs_flush_journal(log, wait); |
| jfs_syncpt(log, 0); |
| } |
| |
| return 0; |
| } |
| |
| static int jfs_show_options(struct seq_file *seq, struct dentry *root) |
| { |
| struct jfs_sb_info *sbi = JFS_SBI(root->d_sb); |
| |
| if (uid_valid(sbi->uid)) |
| seq_printf(seq, ",uid=%d", from_kuid(&init_user_ns, sbi->uid)); |
| if (gid_valid(sbi->gid)) |
| seq_printf(seq, ",gid=%d", from_kgid(&init_user_ns, sbi->gid)); |
| if (sbi->umask != -1) |
| seq_printf(seq, ",umask=%03o", sbi->umask); |
| if (sbi->flag & JFS_NOINTEGRITY) |
| seq_puts(seq, ",nointegrity"); |
| if (sbi->flag & JFS_DISCARD) |
| seq_printf(seq, ",discard=%u", sbi->minblks_trim); |
| if (sbi->nls_tab) |
| seq_printf(seq, ",iocharset=%s", sbi->nls_tab->charset); |
| if (sbi->flag & JFS_ERR_CONTINUE) |
| seq_printf(seq, ",errors=continue"); |
| if (sbi->flag & JFS_ERR_PANIC) |
| seq_printf(seq, ",errors=panic"); |
| |
| #ifdef CONFIG_QUOTA |
| if (sbi->flag & JFS_USRQUOTA) |
| seq_puts(seq, ",usrquota"); |
| |
| if (sbi->flag & JFS_GRPQUOTA) |
| seq_puts(seq, ",grpquota"); |
| #endif |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_QUOTA |
| |
| /* Read data from quotafile - avoid pagecache and such because we cannot afford |
| * acquiring the locks... As quota files are never truncated and quota code |
| * itself serializes the operations (and no one else should touch the files) |
| * we don't have to be afraid of races */ |
| static ssize_t jfs_quota_read(struct super_block *sb, int type, char *data, |
| size_t len, loff_t off) |
| { |
| struct inode *inode = sb_dqopt(sb)->files[type]; |
| sector_t blk = off >> sb->s_blocksize_bits; |
| int err = 0; |
| int offset = off & (sb->s_blocksize - 1); |
| int tocopy; |
| size_t toread; |
| struct buffer_head tmp_bh; |
| struct buffer_head *bh; |
| loff_t i_size = i_size_read(inode); |
| |
| if (off > i_size) |
| return 0; |
| if (off+len > i_size) |
| len = i_size-off; |
| toread = len; |
| while (toread > 0) { |
| tocopy = min_t(size_t, sb->s_blocksize - offset, toread); |
| |
| tmp_bh.b_state = 0; |
| tmp_bh.b_size = i_blocksize(inode); |
| err = jfs_get_block(inode, blk, &tmp_bh, 0); |
| if (err) |
| return err; |
| if (!buffer_mapped(&tmp_bh)) /* A hole? */ |
| memset(data, 0, tocopy); |
| else { |
| bh = sb_bread(sb, tmp_bh.b_blocknr); |
| if (!bh) |
| return -EIO; |
| memcpy(data, bh->b_data+offset, tocopy); |
| brelse(bh); |
| } |
| offset = 0; |
| toread -= tocopy; |
| data += tocopy; |
| blk++; |
| } |
| return len; |
| } |
| |
| /* Write to quotafile */ |
| static ssize_t jfs_quota_write(struct super_block *sb, int type, |
| const char *data, size_t len, loff_t off) |
| { |
| struct inode *inode = sb_dqopt(sb)->files[type]; |
| sector_t blk = off >> sb->s_blocksize_bits; |
| int err = 0; |
| int offset = off & (sb->s_blocksize - 1); |
| int tocopy; |
| size_t towrite = len; |
| struct buffer_head tmp_bh; |
| struct buffer_head *bh; |
| |
| inode_lock(inode); |
| while (towrite > 0) { |
| tocopy = min_t(size_t, sb->s_blocksize - offset, towrite); |
| |
| tmp_bh.b_state = 0; |
| tmp_bh.b_size = i_blocksize(inode); |
| err = jfs_get_block(inode, blk, &tmp_bh, 1); |
| if (err) |
| goto out; |
| if (offset || tocopy != sb->s_blocksize) |
| bh = sb_bread(sb, tmp_bh.b_blocknr); |
| else |
| bh = sb_getblk(sb, tmp_bh.b_blocknr); |
| if (!bh) { |
| err = -EIO; |
| goto out; |
| } |
| lock_buffer(bh); |
| memcpy(bh->b_data+offset, data, tocopy); |
| flush_dcache_page(bh->b_page); |
| set_buffer_uptodate(bh); |
| mark_buffer_dirty(bh); |
| unlock_buffer(bh); |
| brelse(bh); |
| offset = 0; |
| towrite -= tocopy; |
| data += tocopy; |
| blk++; |
| } |
| out: |
| if (len == towrite) { |
| inode_unlock(inode); |
| return err; |
| } |
| if (inode->i_size < off+len-towrite) |
| i_size_write(inode, off+len-towrite); |
| inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
| mark_inode_dirty(inode); |
| inode_unlock(inode); |
| return len - towrite; |
| } |
| |
| static struct dquot **jfs_get_dquots(struct inode *inode) |
| { |
| return JFS_IP(inode)->i_dquot; |
| } |
| |
| static int jfs_quota_on(struct super_block *sb, int type, int format_id, |
| const struct path *path) |
| { |
| int err; |
| struct inode *inode; |
| |
| err = dquot_quota_on(sb, type, format_id, path); |
| if (err) |
| return err; |
| |
| inode = d_inode(path->dentry); |
| inode_lock(inode); |
| JFS_IP(inode)->mode2 |= JFS_NOATIME_FL | JFS_IMMUTABLE_FL; |
| inode_set_flags(inode, S_NOATIME | S_IMMUTABLE, |
| S_NOATIME | S_IMMUTABLE); |
| inode_unlock(inode); |
| mark_inode_dirty(inode); |
| |
| return 0; |
| } |
| |
| static int jfs_quota_off(struct super_block *sb, int type) |
| { |
| struct inode *inode = sb_dqopt(sb)->files[type]; |
| int err; |
| |
| if (!inode || !igrab(inode)) |
| goto out; |
| |
| err = dquot_quota_off(sb, type); |
| if (err) |
| goto out_put; |
| |
| inode_lock(inode); |
| JFS_IP(inode)->mode2 &= ~(JFS_NOATIME_FL | JFS_IMMUTABLE_FL); |
| inode_set_flags(inode, 0, S_NOATIME | S_IMMUTABLE); |
| inode_unlock(inode); |
| mark_inode_dirty(inode); |
| out_put: |
| iput(inode); |
| return err; |
| out: |
| return dquot_quota_off(sb, type); |
| } |
| #endif |
| |
| static const struct super_operations jfs_super_operations = { |
| .alloc_inode = jfs_alloc_inode, |
| .free_inode = jfs_free_inode, |
| .dirty_inode = jfs_dirty_inode, |
| .write_inode = jfs_write_inode, |
| .evict_inode = jfs_evict_inode, |
| .put_super = jfs_put_super, |
| .sync_fs = jfs_sync_fs, |
| .freeze_fs = jfs_freeze, |
| .unfreeze_fs = jfs_unfreeze, |
| .statfs = jfs_statfs, |
| .remount_fs = jfs_remount, |
| .show_options = jfs_show_options, |
| #ifdef CONFIG_QUOTA |
| .quota_read = jfs_quota_read, |
| .quota_write = jfs_quota_write, |
| .get_dquots = jfs_get_dquots, |
| #endif |
| }; |
| |
| static const struct export_operations jfs_export_operations = { |
| .encode_fh = generic_encode_ino32_fh, |
| .fh_to_dentry = jfs_fh_to_dentry, |
| .fh_to_parent = jfs_fh_to_parent, |
| .get_parent = jfs_get_parent, |
| }; |
| |
| static struct file_system_type jfs_fs_type = { |
| .owner = THIS_MODULE, |
| .name = "jfs", |
| .mount = jfs_do_mount, |
| .kill_sb = kill_block_super, |
| .fs_flags = FS_REQUIRES_DEV, |
| }; |
| MODULE_ALIAS_FS("jfs"); |
| |
| static void init_once(void *foo) |
| { |
| struct jfs_inode_info *jfs_ip = (struct jfs_inode_info *) foo; |
| |
| memset(jfs_ip, 0, sizeof(struct jfs_inode_info)); |
| INIT_LIST_HEAD(&jfs_ip->anon_inode_list); |
| init_rwsem(&jfs_ip->rdwrlock); |
| mutex_init(&jfs_ip->commit_mutex); |
| init_rwsem(&jfs_ip->xattr_sem); |
| spin_lock_init(&jfs_ip->ag_lock); |
| jfs_ip->active_ag = -1; |
| inode_init_once(&jfs_ip->vfs_inode); |
| } |
| |
| static int __init init_jfs_fs(void) |
| { |
| int i; |
| int rc; |
| |
| jfs_inode_cachep = |
| kmem_cache_create_usercopy("jfs_ip", sizeof(struct jfs_inode_info), |
| 0, SLAB_RECLAIM_ACCOUNT|SLAB_ACCOUNT, |
| offsetof(struct jfs_inode_info, i_inline_all), |
| sizeof_field(struct jfs_inode_info, i_inline_all), |
| init_once); |
| if (jfs_inode_cachep == NULL) |
| return -ENOMEM; |
| |
| /* |
| * Metapage initialization |
| */ |
| rc = metapage_init(); |
| if (rc) { |
| jfs_err("metapage_init failed w/rc = %d", rc); |
| goto free_slab; |
| } |
| |
| /* |
| * Transaction Manager initialization |
| */ |
| rc = txInit(); |
| if (rc) { |
| jfs_err("txInit failed w/rc = %d", rc); |
| goto free_metapage; |
| } |
| |
| /* |
| * I/O completion thread (endio) |
| */ |
| jfsIOthread = kthread_run(jfsIOWait, NULL, "jfsIO"); |
| if (IS_ERR(jfsIOthread)) { |
| rc = PTR_ERR(jfsIOthread); |
| jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
| goto end_txmngr; |
| } |
| |
| if (commit_threads < 1) |
| commit_threads = num_online_cpus(); |
| if (commit_threads > MAX_COMMIT_THREADS) |
| commit_threads = MAX_COMMIT_THREADS; |
| |
| for (i = 0; i < commit_threads; i++) { |
| jfsCommitThread[i] = kthread_run(jfs_lazycommit, NULL, |
| "jfsCommit"); |
| if (IS_ERR(jfsCommitThread[i])) { |
| rc = PTR_ERR(jfsCommitThread[i]); |
| jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
| commit_threads = i; |
| goto kill_committask; |
| } |
| } |
| |
| jfsSyncThread = kthread_run(jfs_sync, NULL, "jfsSync"); |
| if (IS_ERR(jfsSyncThread)) { |
| rc = PTR_ERR(jfsSyncThread); |
| jfs_err("init_jfs_fs: fork failed w/rc = %d", rc); |
| goto kill_committask; |
| } |
| |
| #ifdef PROC_FS_JFS |
| jfs_proc_init(); |
| #endif |
| |
| rc = register_filesystem(&jfs_fs_type); |
| if (!rc) |
| return 0; |
| |
| #ifdef PROC_FS_JFS |
| jfs_proc_clean(); |
| #endif |
| kthread_stop(jfsSyncThread); |
| kill_committask: |
| for (i = 0; i < commit_threads; i++) |
| kthread_stop(jfsCommitThread[i]); |
| kthread_stop(jfsIOthread); |
| end_txmngr: |
| txExit(); |
| free_metapage: |
| metapage_exit(); |
| free_slab: |
| kmem_cache_destroy(jfs_inode_cachep); |
| return rc; |
| } |
| |
| static void __exit exit_jfs_fs(void) |
| { |
| int i; |
| |
| jfs_info("exit_jfs_fs called"); |
| |
| txExit(); |
| metapage_exit(); |
| |
| kthread_stop(jfsIOthread); |
| for (i = 0; i < commit_threads; i++) |
| kthread_stop(jfsCommitThread[i]); |
| kthread_stop(jfsSyncThread); |
| #ifdef PROC_FS_JFS |
| jfs_proc_clean(); |
| #endif |
| unregister_filesystem(&jfs_fs_type); |
| |
| /* |
| * Make sure all delayed rcu free inodes are flushed before we |
| * destroy cache. |
| */ |
| rcu_barrier(); |
| kmem_cache_destroy(jfs_inode_cachep); |
| } |
| |
| module_init(init_jfs_fs) |
| module_exit(exit_jfs_fs) |