cregit-Linux how code gets into the kernel

Release 4.10 fs/jfs/super.c

Directory: fs/jfs
/*
 *   Copyright (C) International Business Machines Corp., 2000-2004
 *   Portions Copyright (C) Christoph Hellwig, 2001-2002
 *
 *   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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#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"

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->s_flags & MS_RDONLY)
		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 |= MS_RDONLY;
	}

	/* nothing is done for continue beyond marking the superblock dirty */
}


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dave kleikampdave kleikamp8098.77%150.00%


joe perchesjoe perches11.23%150.00%


Total81100.00%2100.00%






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);
}


Contributors
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dave kleikampdave kleikamp4259.15%125.00%


joe perchesjoe perches2738.03%125.00%


tino reichardttino reichardt11.41%125.00%


scott woodscott wood11.41%125.00%


Total71100.00%4100.00%






static struct inode *jfs_alloc_inode(struct super_block *sb)
{
	struct jfs_inode_info *jfs_inode;

	jfs_inode = kmem_cache_alloc(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;
}


Contributors
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dave kleikampdave kleikamp4165.08%150.00%


jan karajan kara2234.92%150.00%


Total63100.00%2100.00%






static void jfs_i_callback(struct rcu_head *head)
{
	struct inode *inode = container_of(head, struct inode, i_rcu);
	struct jfs_inode_info *ji = JFS_IP(inode);
	kmem_cache_free(jfs_inode_cachep, ji);
}


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nick pigginnick piggin43100.00%1100.00%


Total43100.00%1100.00%






static void jfs_destroy_inode(struct inode *inode)
{
	struct jfs_inode_info *ji = JFS_IP(inode);

	BUG_ON(!list_empty(&ji->anon_inode_list));

	spin_lock_irq(&ji->ag_lock);
	if (ji->active_ag != -1) {
		struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
		atomic_dec(&bmap->db_active[ji->active_ag]);
		ji->active_ag = -1;
	}
	spin_unlock_irq(&ji->ag_lock);
	call_rcu(&inode->i_rcu, jfs_i_callback);
}


Contributors
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dave kleikampdave kleikamp9894.23%583.33%


nick pigginnick piggin65.77%116.67%


Total104100.00%6100.00%






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] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
	buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
					sizeof(sbi->uuid)/2);

	buf->f_namelen = JFS_NAME_MAX;
	return 0;
}


Contributors
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dave kleikampdave kleikamp16468.33%342.86%


coly licoly li6928.75%114.29%


david howellsdavid howells52.08%114.29%


philippe de muyterphilippe de muyter10.42%114.29%


andrew mortonandrew morton10.42%114.29%


Total240100.00%7100.00%






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");

	dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED);

	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);
}


Contributors
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dave kleikampdave kleikamp7786.52%375.00%


christoph hellwigchristoph hellwig1213.48%125.00%


Total89100.00%4100.00%



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_ignore, "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->s_bdev->bd_inode->i_size >>
				sb->s_blocksize_bits;
			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:
		{
			struct request_queue *q = bdev_get_queue(sb->s_bdev);
			/* if set to 1, even copying files will cause
                         * trimming :O
                         * -> user has more control over the online trimming
                         */
			sbi->minblks_trim = 64;
			if (blk_queue_discard(q))
				*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:
		{
			struct request_queue *q = bdev_get_queue(sb->s_bdev);
			char *minblks_trim = args[0].from;
			int rc;
			if (blk_queue_discard(q)) {
				*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;
}


Contributors
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dave kleikampdave kleikamp47156.75%853.33%


tino reichardttino reichardt11313.61%16.67%


fabian frederickfabian frederick779.28%213.33%


andrew mortonandrew morton627.47%16.67%


eric w. biedermaneric w. biederman566.75%16.67%


mark bellonmark bellon404.82%16.67%


dave jonesdave jones111.33%16.67%


Total830100.00%15100.00%






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->s_flags & MS_RDONLY) {
			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->s_flags & MS_RDONLY) && !(*flags & MS_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 &= ~MS_RDONLY;

		dquot_resume(sb, -1);
		return ret;
	}
	if ((!(sb->s_flags & MS_RDONLY)) && (*flags & MS_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->s_flags & MS_RDONLY)) {
			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;
}


Contributors
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dave kleikampdave kleikamp26682.87%545.45%


christoph hellwigchristoph hellwig3510.90%218.18%


alessio igor boganialessio igor bogani134.05%19.09%


theodore tsotheodore tso51.56%19.09%


fabian frederickfabian frederick10.31%19.09%


tino reichardttino reichardt10.31%19.09%


Total321100.00%11100.00%






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;
	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 |= MS_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 = &dquot_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_ino = 0;
	inode->i_size = sb->s_bdev->bd_inode->i_size;
	inode->i_mapping->a_ops = &jfs_metapage_aops;
	hlist_add_fake(&inode->i_hash);
	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;

	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. */
	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_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");

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;
}


Contributors
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dave kleikampdave kleikamp46778.89%1337.14%


christoph hellwigchristoph hellwig366.08%411.43%


al viroal viro284.73%617.14%


david howellsdavid howells244.05%12.86%


jan blunckjan blunck101.69%12.86%


jan karajan kara81.35%12.86%


andi kleenandi kleen61.01%12.86%


eric w. biedermaneric w. biederman40.68%12.86%


alan coxalan cox30.51%12.86%


tino reichardttino reichardt10.17%12.86%


brian gerstbrian gerst10.17%12.86%


hirofumi ogawahirofumi ogawa10.17%12.86%


eric sesterhenneric sesterhenn10.17%12.86%


akinobu mitaakinobu mita10.17%12.86%


kirill a. shutemovkirill a. shutemov10.17%12.86%


Total592100.00%35100.00%






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->s_flags & MS_RDONLY)) {
		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;
}


Contributors
PersonTokensPropCommitsCommitProp
dave kleikampdave kleikamp5854.72%342.86%


vahram martirosyanvahram martirosyan4138.68%114.29%


takashi satotakashi sato54.72%114.29%


joe perchesjoe perches21.89%228.57%


Total106100.00%7100.00%






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)) {
		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;
}


Contributors
PersonTokensPropCommitsCommitProp
dave kleikampdave kleikamp7170.30%350.00%


vahram martirosyanvahram martirosyan2423.76%116.67%


takashi satotakashi sato43.96%116.67%


joe perchesjoe perches21.98%116.67%


Total101100.00%6100.00%






static struct dentry *jfs_do_mount(struct file_system_type *fs_type,
	int flags, const char *dev_name,