![Christoph Hellwig](/assets/img/avatar_default.png)
Follow the dquot_* style used elsewhere in dquot.c. [Jan Kara: Fixed up missing conversion of ext2] Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Jan Kara <jack@suse.cz>
914 lines
21 KiB
C
914 lines
21 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2004
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* Portions Copyright (C) Christoph Hellwig, 2001-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <linux/fs.h>
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#include <linux/module.h>
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#include <linux/parser.h>
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#include <linux/completion.h>
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#include <linux/vfs.h>
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#include <linux/quotaops.h>
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#include <linux/mount.h>
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#include <linux/moduleparam.h>
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#include <linux/kthread.h>
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#include <linux/posix_acl.h>
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#include <linux/buffer_head.h>
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#include <linux/exportfs.h>
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#include <linux/crc32.h>
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#include <linux/slab.h>
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#include <asm/uaccess.h>
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#include <linux/seq_file.h>
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#include <linux/smp_lock.h>
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#include "jfs_incore.h"
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#include "jfs_filsys.h"
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#include "jfs_inode.h"
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#include "jfs_metapage.h"
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#include "jfs_superblock.h"
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#include "jfs_dmap.h"
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#include "jfs_imap.h"
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#include "jfs_acl.h"
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#include "jfs_debug.h"
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MODULE_DESCRIPTION("The Journaled Filesystem (JFS)");
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MODULE_AUTHOR("Steve Best/Dave Kleikamp/Barry Arndt, IBM");
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MODULE_LICENSE("GPL");
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static struct kmem_cache * jfs_inode_cachep;
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static const struct super_operations jfs_super_operations;
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static const struct export_operations jfs_export_operations;
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static struct file_system_type jfs_fs_type;
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#define MAX_COMMIT_THREADS 64
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static int commit_threads = 0;
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module_param(commit_threads, int, 0);
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MODULE_PARM_DESC(commit_threads, "Number of commit threads");
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static struct task_struct *jfsCommitThread[MAX_COMMIT_THREADS];
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struct task_struct *jfsIOthread;
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struct task_struct *jfsSyncThread;
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#ifdef CONFIG_JFS_DEBUG
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int jfsloglevel = JFS_LOGLEVEL_WARN;
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module_param(jfsloglevel, int, 0644);
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MODULE_PARM_DESC(jfsloglevel, "Specify JFS loglevel (0, 1 or 2)");
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#endif
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static void jfs_handle_error(struct super_block *sb)
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{
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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if (sb->s_flags & MS_RDONLY)
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return;
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updateSuper(sb, FM_DIRTY);
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if (sbi->flag & JFS_ERR_PANIC)
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panic("JFS (device %s): panic forced after error\n",
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sb->s_id);
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else if (sbi->flag & JFS_ERR_REMOUNT_RO) {
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jfs_err("ERROR: (device %s): remounting filesystem "
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"as read-only\n",
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sb->s_id);
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sb->s_flags |= MS_RDONLY;
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}
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/* nothing is done for continue beyond marking the superblock dirty */
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}
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void jfs_error(struct super_block *sb, const char * function, ...)
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{
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static char error_buf[256];
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va_list args;
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va_start(args, function);
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vsnprintf(error_buf, sizeof(error_buf), function, args);
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va_end(args);
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printk(KERN_ERR "ERROR: (device %s): %s\n", sb->s_id, error_buf);
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jfs_handle_error(sb);
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}
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static struct inode *jfs_alloc_inode(struct super_block *sb)
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{
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struct jfs_inode_info *jfs_inode;
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jfs_inode = kmem_cache_alloc(jfs_inode_cachep, GFP_NOFS);
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if (!jfs_inode)
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return NULL;
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return &jfs_inode->vfs_inode;
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}
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static void jfs_destroy_inode(struct inode *inode)
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{
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struct jfs_inode_info *ji = JFS_IP(inode);
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BUG_ON(!list_empty(&ji->anon_inode_list));
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spin_lock_irq(&ji->ag_lock);
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if (ji->active_ag != -1) {
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struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
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atomic_dec(&bmap->db_active[ji->active_ag]);
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ji->active_ag = -1;
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}
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spin_unlock_irq(&ji->ag_lock);
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kmem_cache_free(jfs_inode_cachep, ji);
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}
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static void jfs_clear_inode(struct inode *inode)
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{
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dquot_drop(inode);
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}
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static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
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{
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struct jfs_sb_info *sbi = JFS_SBI(dentry->d_sb);
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s64 maxinodes;
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struct inomap *imap = JFS_IP(sbi->ipimap)->i_imap;
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jfs_info("In jfs_statfs");
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buf->f_type = JFS_SUPER_MAGIC;
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buf->f_bsize = sbi->bsize;
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buf->f_blocks = sbi->bmap->db_mapsize;
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buf->f_bfree = sbi->bmap->db_nfree;
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buf->f_bavail = sbi->bmap->db_nfree;
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/*
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* If we really return the number of allocated & free inodes, some
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* applications will fail because they won't see enough free inodes.
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* We'll try to calculate some guess as to how may inodes we can
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* really allocate
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*
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* buf->f_files = atomic_read(&imap->im_numinos);
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* buf->f_ffree = atomic_read(&imap->im_numfree);
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*/
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maxinodes = min((s64) atomic_read(&imap->im_numinos) +
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((sbi->bmap->db_nfree >> imap->im_l2nbperiext)
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<< L2INOSPEREXT), (s64) 0xffffffffLL);
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buf->f_files = maxinodes;
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buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
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atomic_read(&imap->im_numfree));
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buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
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buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
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sizeof(sbi->uuid)/2);
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buf->f_namelen = JFS_NAME_MAX;
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return 0;
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}
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static void jfs_put_super(struct super_block *sb)
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{
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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int rc;
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jfs_info("In jfs_put_super");
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dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);
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lock_kernel();
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rc = jfs_umount(sb);
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if (rc)
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jfs_err("jfs_umount failed with return code %d", rc);
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unload_nls(sbi->nls_tab);
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truncate_inode_pages(sbi->direct_inode->i_mapping, 0);
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iput(sbi->direct_inode);
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kfree(sbi);
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unlock_kernel();
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}
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enum {
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Opt_integrity, Opt_nointegrity, Opt_iocharset, Opt_resize,
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Opt_resize_nosize, Opt_errors, Opt_ignore, Opt_err, Opt_quota,
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Opt_usrquota, Opt_grpquota, Opt_uid, Opt_gid, Opt_umask
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};
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static const match_table_t tokens = {
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{Opt_integrity, "integrity"},
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{Opt_nointegrity, "nointegrity"},
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{Opt_iocharset, "iocharset=%s"},
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{Opt_resize, "resize=%u"},
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{Opt_resize_nosize, "resize"},
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{Opt_errors, "errors=%s"},
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{Opt_ignore, "noquota"},
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{Opt_ignore, "quota"},
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{Opt_usrquota, "usrquota"},
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{Opt_grpquota, "grpquota"},
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{Opt_uid, "uid=%u"},
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{Opt_gid, "gid=%u"},
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{Opt_umask, "umask=%u"},
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{Opt_err, NULL}
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};
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static int parse_options(char *options, struct super_block *sb, s64 *newLVSize,
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int *flag)
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{
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void *nls_map = (void *)-1; /* -1: no change; NULL: none */
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char *p;
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struct jfs_sb_info *sbi = JFS_SBI(sb);
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*newLVSize = 0;
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if (!options)
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return 1;
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while ((p = strsep(&options, ",")) != NULL) {
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substring_t args[MAX_OPT_ARGS];
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int token;
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if (!*p)
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continue;
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token = match_token(p, tokens, args);
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switch (token) {
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case Opt_integrity:
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*flag &= ~JFS_NOINTEGRITY;
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break;
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case Opt_nointegrity:
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*flag |= JFS_NOINTEGRITY;
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break;
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case Opt_ignore:
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/* Silently ignore the quota options */
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/* Don't do anything ;-) */
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break;
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case Opt_iocharset:
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if (nls_map && nls_map != (void *) -1)
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unload_nls(nls_map);
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if (!strcmp(args[0].from, "none"))
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nls_map = NULL;
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else {
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nls_map = load_nls(args[0].from);
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if (!nls_map) {
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printk(KERN_ERR
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"JFS: charset not found\n");
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goto cleanup;
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}
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}
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break;
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case Opt_resize:
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{
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char *resize = args[0].from;
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*newLVSize = simple_strtoull(resize, &resize, 0);
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break;
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}
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case Opt_resize_nosize:
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{
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*newLVSize = sb->s_bdev->bd_inode->i_size >>
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sb->s_blocksize_bits;
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if (*newLVSize == 0)
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printk(KERN_ERR
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"JFS: Cannot determine volume size\n");
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break;
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}
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case Opt_errors:
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{
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char *errors = args[0].from;
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if (!errors || !*errors)
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goto cleanup;
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if (!strcmp(errors, "continue")) {
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*flag &= ~JFS_ERR_REMOUNT_RO;
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*flag &= ~JFS_ERR_PANIC;
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*flag |= JFS_ERR_CONTINUE;
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} else if (!strcmp(errors, "remount-ro")) {
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*flag &= ~JFS_ERR_CONTINUE;
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*flag &= ~JFS_ERR_PANIC;
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*flag |= JFS_ERR_REMOUNT_RO;
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} else if (!strcmp(errors, "panic")) {
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*flag &= ~JFS_ERR_CONTINUE;
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*flag &= ~JFS_ERR_REMOUNT_RO;
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*flag |= JFS_ERR_PANIC;
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} else {
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printk(KERN_ERR
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"JFS: %s is an invalid error handler\n",
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errors);
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goto cleanup;
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}
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break;
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}
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#ifdef CONFIG_QUOTA
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case Opt_quota:
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case Opt_usrquota:
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*flag |= JFS_USRQUOTA;
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break;
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case Opt_grpquota:
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*flag |= JFS_GRPQUOTA;
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break;
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#else
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case Opt_usrquota:
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case Opt_grpquota:
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case Opt_quota:
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printk(KERN_ERR
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"JFS: quota operations not supported\n");
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break;
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#endif
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case Opt_uid:
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{
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char *uid = args[0].from;
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sbi->uid = simple_strtoul(uid, &uid, 0);
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break;
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}
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case Opt_gid:
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{
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char *gid = args[0].from;
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sbi->gid = simple_strtoul(gid, &gid, 0);
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break;
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}
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case Opt_umask:
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{
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char *umask = args[0].from;
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sbi->umask = simple_strtoul(umask, &umask, 8);
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if (sbi->umask & ~0777) {
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printk(KERN_ERR
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"JFS: Invalid value of umask\n");
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goto cleanup;
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}
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break;
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}
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default:
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printk("jfs: Unrecognized mount option \"%s\" "
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" or missing value\n", p);
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goto cleanup;
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}
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}
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if (nls_map != (void *) -1) {
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/* Discard old (if remount) */
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unload_nls(sbi->nls_tab);
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sbi->nls_tab = nls_map;
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}
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return 1;
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cleanup:
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if (nls_map && nls_map != (void *) -1)
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unload_nls(nls_map);
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return 0;
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}
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static int jfs_remount(struct super_block *sb, int *flags, char *data)
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{
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s64 newLVSize = 0;
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int rc = 0;
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int flag = JFS_SBI(sb)->flag;
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int ret;
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if (!parse_options(data, sb, &newLVSize, &flag)) {
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return -EINVAL;
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}
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lock_kernel();
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if (newLVSize) {
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if (sb->s_flags & MS_RDONLY) {
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printk(KERN_ERR
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"JFS: resize requires volume to be mounted read-write\n");
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unlock_kernel();
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return -EROFS;
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}
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rc = jfs_extendfs(sb, newLVSize, 0);
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if (rc) {
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unlock_kernel();
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return rc;
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}
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}
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if ((sb->s_flags & MS_RDONLY) && !(*flags & MS_RDONLY)) {
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/*
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* Invalidate any previously read metadata. fsck may have
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* changed the on-disk data since we mounted r/o
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*/
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truncate_inode_pages(JFS_SBI(sb)->direct_inode->i_mapping, 0);
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JFS_SBI(sb)->flag = flag;
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ret = jfs_mount_rw(sb, 1);
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|
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/* mark the fs r/w for quota activity */
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sb->s_flags &= ~MS_RDONLY;
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unlock_kernel();
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dquot_resume(sb, -1);
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return ret;
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}
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if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_RDONLY)) {
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rc = dquot_suspend(sb, -1);
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if (rc < 0) {
|
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unlock_kernel();
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return rc;
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}
|
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rc = jfs_umount_rw(sb);
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JFS_SBI(sb)->flag = flag;
|
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unlock_kernel();
|
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return rc;
|
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}
|
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if ((JFS_SBI(sb)->flag & JFS_NOINTEGRITY) != (flag & JFS_NOINTEGRITY))
|
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if (!(sb->s_flags & MS_RDONLY)) {
|
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rc = jfs_umount_rw(sb);
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if (rc) {
|
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unlock_kernel();
|
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return rc;
|
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}
|
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JFS_SBI(sb)->flag = flag;
|
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ret = jfs_mount_rw(sb, 1);
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unlock_kernel();
|
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return ret;
|
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}
|
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JFS_SBI(sb)->flag = flag;
|
|
|
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unlock_kernel();
|
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return 0;
|
|
}
|
|
|
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static int jfs_fill_super(struct super_block *sb, void *data, int silent)
|
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{
|
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struct jfs_sb_info *sbi;
|
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struct inode *inode;
|
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int rc;
|
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s64 newLVSize = 0;
|
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int flag, ret = -EINVAL;
|
|
|
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jfs_info("In jfs_read_super: s_flags=0x%lx", sb->s_flags);
|
|
|
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if (!new_valid_dev(sb->s_bdev->bd_dev))
|
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return -EOVERFLOW;
|
|
|
|
sbi = kzalloc(sizeof (struct jfs_sb_info), GFP_KERNEL);
|
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if (!sbi)
|
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return -ENOMEM;
|
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sb->s_fs_info = sbi;
|
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sbi->sb = sb;
|
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sbi->uid = sbi->gid = sbi->umask = -1;
|
|
|
|
/* initialize the mount flag and determine the default error handler */
|
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flag = JFS_ERR_REMOUNT_RO;
|
|
|
|
if (!parse_options((char *) data, sb, &newLVSize, &flag))
|
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goto out_kfree;
|
|
sbi->flag = flag;
|
|
|
|
#ifdef CONFIG_JFS_POSIX_ACL
|
|
sb->s_flags |= MS_POSIXACL;
|
|
#endif
|
|
|
|
if (newLVSize) {
|
|
printk(KERN_ERR "resize option for remount only\n");
|
|
goto out_kfree;
|
|
}
|
|
|
|
/*
|
|
* Initialize blocksize to 4K.
|
|
*/
|
|
sb_set_blocksize(sb, PSIZE);
|
|
|
|
/*
|
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* Set method vectors.
|
|
*/
|
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sb->s_op = &jfs_super_operations;
|
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sb->s_export_op = &jfs_export_operations;
|
|
#ifdef CONFIG_QUOTA
|
|
sb->dq_op = &dquot_operations;
|
|
sb->s_qcop = &dquot_quotactl_ops;
|
|
#endif
|
|
|
|
/*
|
|
* Initialize direct-mapping inode/address-space
|
|
*/
|
|
inode = new_inode(sb);
|
|
if (inode == NULL) {
|
|
ret = -ENOMEM;
|
|
goto out_unload;
|
|
}
|
|
inode->i_ino = 0;
|
|
inode->i_nlink = 1;
|
|
inode->i_size = sb->s_bdev->bd_inode->i_size;
|
|
inode->i_mapping->a_ops = &jfs_metapage_aops;
|
|
insert_inode_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->s_flags & MS_RDONLY)
|
|
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;
|
|
|
|
inode = jfs_iget(sb, ROOT_I);
|
|
if (IS_ERR(inode)) {
|
|
ret = PTR_ERR(inode);
|
|
goto out_no_rw;
|
|
}
|
|
sb->s_root = d_alloc_root(inode);
|
|
if (!sb->s_root)
|
|
goto out_no_root;
|
|
|
|
if (sbi->mntflag & JFS_OS2)
|
|
sb->s_root->d_op = &jfs_ci_dentry_operations;
|
|
|
|
/* logical blocks are represented by 40 bits in pxd_t, etc. */
|
|
sb->s_maxbytes = ((u64) sb->s_blocksize) << 40;
|
|
#if BITS_PER_LONG == 32
|
|
/*
|
|
* Page cache is indexed by long.
|
|
* I would use MAX_LFS_FILESIZE, but it's only half as big
|
|
*/
|
|
sb->s_maxbytes = min(((u64) PAGE_CACHE_SIZE << 32) - 1, (u64)sb->s_maxbytes);
|
|
#endif
|
|
sb->s_time_gran = 1;
|
|
return 0;
|
|
|
|
out_no_root:
|
|
jfs_err("jfs_read_super: get root dentry failed");
|
|
iput(inode);
|
|
|
|
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:
|
|
if (sbi->nls_tab)
|
|
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;
|
|
|
|
if (!(sb->s_flags & MS_RDONLY)) {
|
|
txQuiesce(sb);
|
|
lmLogShutdown(log);
|
|
updateSuper(sb, FM_CLEAN);
|
|
}
|
|
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->s_flags & MS_RDONLY)) {
|
|
updateSuper(sb, FM_MOUNT);
|
|
if ((rc = lmLogInit(log)))
|
|
jfs_err("jfs_unlock failed with return code %d", rc);
|
|
else
|
|
txResume(sb);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int jfs_get_sb(struct file_system_type *fs_type,
|
|
int flags, const char *dev_name, void *data, struct vfsmount *mnt)
|
|
{
|
|
return get_sb_bdev(fs_type, flags, dev_name, data, jfs_fill_super,
|
|
mnt);
|
|
}
|
|
|
|
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) {
|
|
jfs_flush_journal(log, wait);
|
|
jfs_syncpt(log, 0);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int jfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
|
|
{
|
|
struct jfs_sb_info *sbi = JFS_SBI(vfs->mnt_sb);
|
|
|
|
if (sbi->uid != -1)
|
|
seq_printf(seq, ",uid=%d", sbi->uid);
|
|
if (sbi->gid != -1)
|
|
seq_printf(seq, ",gid=%d", sbi->gid);
|
|
if (sbi->umask != -1)
|
|
seq_printf(seq, ",umask=%03o", sbi->umask);
|
|
if (sbi->flag & JFS_NOINTEGRITY)
|
|
seq_puts(seq, ",nointegrity");
|
|
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 noone 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 = sb->s_blocksize - offset < toread ?
|
|
sb->s_blocksize - offset : toread;
|
|
|
|
tmp_bh.b_state = 0;
|
|
tmp_bh.b_size = 1 << inode->i_blkbits;
|
|
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;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
while (towrite > 0) {
|
|
tocopy = sb->s_blocksize - offset < towrite ?
|
|
sb->s_blocksize - offset : towrite;
|
|
|
|
tmp_bh.b_state = 0;
|
|
tmp_bh.b_size = 1 << inode->i_blkbits;
|
|
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) {
|
|
mutex_unlock(&inode->i_mutex);
|
|
return err;
|
|
}
|
|
if (inode->i_size < off+len-towrite)
|
|
i_size_write(inode, off+len-towrite);
|
|
inode->i_version++;
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
mark_inode_dirty(inode);
|
|
mutex_unlock(&inode->i_mutex);
|
|
return len - towrite;
|
|
}
|
|
|
|
#endif
|
|
|
|
static const struct super_operations jfs_super_operations = {
|
|
.alloc_inode = jfs_alloc_inode,
|
|
.destroy_inode = jfs_destroy_inode,
|
|
.dirty_inode = jfs_dirty_inode,
|
|
.write_inode = jfs_write_inode,
|
|
.delete_inode = jfs_delete_inode,
|
|
.clear_inode = jfs_clear_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,
|
|
#endif
|
|
};
|
|
|
|
static const struct export_operations jfs_export_operations = {
|
|
.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",
|
|
.get_sb = jfs_get_sb,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV,
|
|
};
|
|
|
|
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("jfs_ip", sizeof(struct jfs_inode_info), 0,
|
|
SLAB_RECLAIM_ACCOUNT|SLAB_MEM_SPREAD,
|
|
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
|
|
|
|
return register_filesystem(&jfs_fs_type);
|
|
|
|
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);
|
|
kmem_cache_destroy(jfs_inode_cachep);
|
|
}
|
|
|
|
module_init(init_jfs_fs)
|
|
module_exit(exit_jfs_fs)
|