C++ IMustLock函数代码示例

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本文整理汇总了C++中IMustLock函数的典型用法代码示例。如果您正苦于以下问题：C++ IMustLock函数的具体用法？C++ IMustLock怎么用？C++ IMustLock使用的例子？那么恭喜您, 这里精选的函数代码示例或许可以为您提供帮助。

在下文中一共展示了IMustLock函数的20个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的C++代码示例。

示例1: epilog

/*
 * final procedure of adding a new entry, except link(2).
 * remove whiteout, instantiate, copyup the parent dir's times and size
 * and update version.
 * if it failed, re-create the removed whiteout.
 */
static int epilog(struct inode *dir, aufs_bindex_t bindex,
		  struct dentry *wh_dentry, struct dentry *dentry)
{
	int err, rerr;
	aufs_bindex_t bwh;
	struct path h_path;
	struct inode *inode, *h_dir;
	struct dentry *wh;

	bwh = -1;
	if (wh_dentry) {
		h_dir = wh_dentry->d_parent->d_inode; /* dir inode is locked */
		IMustLock(h_dir);
		AuDebugOn(au_h_iptr(dir, bindex) != h_dir);
		bwh = au_dbwh(dentry);
		h_path.dentry = wh_dentry;
		h_path.mnt = au_sbr_mnt(dir->i_sb, bindex);
		err = au_wh_unlink_dentry(au_h_iptr(dir, bindex), &h_path,
					  dentry);
		if (unlikely(err))
			goto out;
	}

	inode = au_new_inode(dentry, /*must_new*/1);
	if (!IS_ERR(inode)) {
		d_instantiate(dentry, inode);
		dir = dentry->d_parent->d_inode; /* dir inode is locked */
		IMustLock(dir);
		if (au_ibstart(dir) == au_dbstart(dentry))
			au_cpup_attr_timesizes(dir);
		dir->i_version++;
		return 0; /* success */
	}

	err = PTR_ERR(inode);
	if (!wh_dentry)
		goto out;

	/* revert */
	/* dir inode is locked */
	wh = au_wh_create(dentry, bwh, wh_dentry->d_parent);
	rerr = PTR_ERR(wh);
	if (IS_ERR(wh)) {
		AuIOErr("%.*s reverting whiteout failed(%d, %d)\n",
			AuDLNPair(dentry), err, rerr);
		err = -EIO;
	} else
		dput(wh);

out:
	return err;
}

开发者ID:Jman420，项目名称:nanoBoot-DSM5.1，代码行数:58，代码来源:i_op_add.c

示例2: au_whtmp_ren

/*
 * rename the @h_dentry on @br to the whiteouted temporary name.
 */
int au_whtmp_ren(struct dentry *h_dentry, struct au_branch *br)
{
	int err;
	struct path h_path = {
		.mnt = au_br_mnt(br)
	};
	struct inode *h_dir;
	struct dentry *h_parent;

	h_parent = h_dentry->d_parent; /* dir inode is locked */
	h_dir = h_parent->d_inode;
	IMustLock(h_dir);

	h_path.dentry = au_whtmp_lkup(h_parent, br, &h_dentry->d_name);
	err = PTR_ERR(h_path.dentry);
	if (IS_ERR(h_path.dentry))
		goto out;

	/* under the same dir, no need to lock_rename() */
	err = vfsub_rename(h_dir, h_dentry, h_dir, &h_path);
	AuTraceErr(err);
	dput(h_path.dentry);

out:
	AuTraceErr(err);
	return err;
}

开发者ID:bjayesh，项目名称:chandra，代码行数:30，代码来源:whout.c

示例3: vfsub_create

int vfsub_create(struct inode *dir, struct path *path, int mode, bool want_excl)
{
	int err;
	struct dentry *d;

	IMustLock(dir);

	d = path->dentry;
	path->dentry = d->d_parent;
	err = security_path_mknod(path, d, mode, 0);
	path->dentry = d;
	if (unlikely(err))
		goto out;

	lockdep_off();
	err = vfs_create(dir, path->dentry, mode, want_excl);
	lockdep_on();
	if (!err) {
		struct path tmp = *path;
		int did;

		vfsub_update_h_iattr(&tmp, &did);
		if (did) {
			tmp.dentry = path->dentry->d_parent;
			vfsub_update_h_iattr(&tmp, /*did*/NULL);
		}
		/*ignore*/
	}

out:
	return err;
}

开发者ID:shinsec，项目名称:linux-parrot，代码行数:32，代码来源:vfsub.c

示例4: vfsub_symlink

int vfsub_symlink(struct inode *dir, struct path *path, const char *symname)
{
	int err;
	struct dentry *d;

	IMustLock(dir);

	d = path->dentry;
	path->dentry = d->d_parent;
	err = security_path_symlink(path, d, symname);
	path->dentry = d;
	if (unlikely(err))
		goto out;

	err = vfs_symlink(dir, path->dentry, symname);
	if (!err) {
		struct path tmp = *path;
		int did;

		vfsub_update_h_iattr(&tmp, &did);
		if (did) {
			tmp.dentry = path->dentry->d_parent;
			vfsub_update_h_iattr(&tmp, /*did*/NULL);
		}
		/*ignore*/
	}

out:
	return err;
}

开发者ID:aywq2008，项目名称:omniplay，代码行数:30，代码来源:vfsub.c

示例5: vfsub_mknod

int vfsub_mknod(struct inode *dir, struct path *path, int mode, dev_t dev)
{
	int err;
	struct dentry *d;

	IMustLock(dir);

	d = path->dentry;
	path->dentry = d->d_parent;
	err = security_path_mknod(path, d, mode, new_encode_dev(dev));
	path->dentry = d;
	if (unlikely(err))
		goto out;

	err = vfs_mknod(dir, path->dentry, mode, dev);
	if (!err) {
		struct path tmp = *path;
		int did;

		vfsub_update_h_iattr(&tmp, &did);
		if (did) {
			tmp.dentry = path->dentry->d_parent;
			vfsub_update_h_iattr(&tmp, /*did*/NULL);
		}
		/*ignore*/
	}

out:
	return err;
}

开发者ID:aywq2008，项目名称:omniplay，代码行数:30，代码来源:vfsub.c

示例6: LKTRTrace

struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
				    int len)
{
	struct dentry *d;

	LKTRTrace("%.*s/%.*s\n", AuDLNPair(parent), len, name);
	IMustLock(parent->d_inode);

	d = lookup_one_len(name, parent, len);
	if (!IS_ERR(d))
		au_update_fuse_h_inode(NULL, d); /*ignore*/
	return d;
}

开发者ID:wosigh，项目名称:patches，代码行数:13，代码来源:vfsub.c

示例7: do_vfsub_rename

int do_vfsub_rename(struct inode *src_dir, struct dentry *src_dentry,
		    struct inode *dir, struct dentry *dentry)
{
	int err;

	LKTRTrace("i%lu, %.*s, i%lu, %.*s\n",
		  src_dir->i_ino, AuDLNPair(src_dentry),
		  dir->i_ino, AuDLNPair(dentry));
	IMustLock(dir);
	IMustLock(src_dir);
	AuDebugOn(src_dir != dir && !vfsub_is_rename_mutex_locked(dir->i_sb));

	lockdep_off();
	err = vfs_rename(src_dir, src_dentry, dir, dentry);
	lockdep_on();
	if (!err) {
		/* dir inode is locked */
		au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/
		au_update_fuse_h_inode(NULL, src_dentry->d_parent); /*ignore*/
		au_update_fuse_h_inode(NULL, src_dentry); /*ignore*/
	}
	return err;
}

开发者ID:wosigh，项目名称:patches，代码行数:23，代码来源:vfsub.c

示例8: au_h_verify

int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir,
		struct dentry *h_parent, struct au_branch *br)
{
	int err;

	err = 0;
	if (udba == AuOpt_UDBA_REVAL) {
		IMustLock(h_dir);
		err = (h_dentry->d_parent->d_inode != h_dir);
	} else if (udba == AuOpt_UDBA_HNOTIFY)
		err = au_h_verify_dentry(h_dentry, h_parent, br);

	return err;
}

开发者ID:marcero，项目名称:ab73kernel-Hannspad-2632，代码行数:14，代码来源:dentry.c

示例9: au_h_verify

int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir,
		struct dentry *h_parent, struct au_branch *br)
{
	int err;

	err = 0;
	if (udba == AuOpt_UDBA_REVAL
	    && !au_test_fs_remote(h_dentry->d_sb)) {
		IMustLock(h_dir);
		err = (d_inode(h_dentry->d_parent) != h_dir);
	} else if (udba != AuOpt_UDBA_NONE)
		err = au_h_verify_dentry(h_dentry, h_parent, br);

	return err;
}

开发者ID:ammubhave，项目名称:bargud，代码行数:15，代码来源:dentry.c

示例10: do_vfsub_rmdir

int do_vfsub_rmdir(struct inode *dir, struct dentry *dentry)
{
	int err;

	LKTRTrace("i%lu, %.*s\n", dir->i_ino, AuDLNPair(dentry));
	IMustLock(dir);

	lockdep_off();
	err = vfs_rmdir(dir, dentry);
	lockdep_on();
	/* dir inode is locked */
	if (!err)
		au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/
	return err;
}

开发者ID:wosigh，项目名称:patches，代码行数:15，代码来源:vfsub.c

示例11: do_vfsub_mkdir

int do_vfsub_mkdir(struct inode *dir, struct dentry *dentry, int mode)
{
	int err;

	LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, AuDLNPair(dentry), mode);
	IMustLock(dir);

	err = vfs_mkdir(dir, dentry, mode);
	if (!err) {
		/* dir inode is locked */
		au_update_fuse_h_inode(NULL, dentry->d_parent); /*ignore*/
		au_update_fuse_h_inode(NULL, dentry); /*ignore*/
	}
	return err;
}

开发者ID:wosigh，项目名称:patches，代码行数:15，代码来源:vfsub.c

示例12: call_notify_change

static void call_notify_change(void *args)
{
	struct notify_change_args *a = args;
	struct inode *h_inode;

	h_inode = a->path->dentry->d_inode;
	IMustLock(h_inode);

	*a->errp = -EPERM;
	if (!IS_IMMUTABLE(h_inode) && !IS_APPEND(h_inode)) {
		*a->errp = notify_change(a->path->dentry, a->ia);
		if (!*a->errp)
			vfsub_update_h_iattr(a->path, /*did*/NULL); /*ignore*/
	}
	AuTraceErr(*a->errp);
}

开发者ID:aywq2008，项目名称:omniplay，代码行数:16，代码来源:vfsub.c

示例13: IMustLock

static struct dentry *aufs_lookup(struct inode *dir, struct dentry *dentry,
				  struct nameidata *nd)
{
	struct dentry *ret, *parent;
	struct inode *inode;
	struct super_block *sb;
	int err, npositive;

	IMustLock(dir);

	sb = dir->i_sb;
	si_read_lock(sb, AuLock_FLUSH);
	ret = ERR_PTR(-ENAMETOOLONG);
	if (unlikely(dentry->d_name.len > AUFS_MAX_NAMELEN))
		goto out;
	err = au_di_init(dentry);
	ret = ERR_PTR(err);
	if (unlikely(err))
		goto out;

	parent = dentry->d_parent; /* dir inode is locked */
	di_read_lock_parent(parent, AuLock_IR);
	npositive = au_lkup_dentry(dentry, au_dbstart(parent), /*type*/0, nd);
	di_read_unlock(parent, AuLock_IR);
	err = npositive;
	ret = ERR_PTR(err);
	if (unlikely(err < 0))
		goto out_unlock;

	inode = NULL;
	if (npositive) {
		inode = au_new_inode(dentry, /*must_new*/0);
		ret = (void *)inode;
	}
	if (IS_ERR(inode))
		goto out_unlock;

	ret = d_splice_alias(inode, dentry);
	if (unlikely(IS_ERR(ret) && inode))
		ii_write_unlock(inode);

 out_unlock:
	di_write_unlock(dentry);
 out:
	si_read_unlock(sb);
	return ret;
}

开发者ID:roalex，项目名称:bravo-kernel，代码行数:47，代码来源:i_op.c

示例14: vfsub_create

int vfsub_create(struct inode *dir, struct path *path, int mode)
{
	int err;
	struct dentry *d;

	IMustLock(dir);

	d = path->dentry;
	path->dentry = d->d_parent;
	err = security_path_mknod(path, d, mode, 0);
	path->dentry = d;
	if (unlikely(err))
		goto out;

	if (au_test_fs_null_nd(dir->i_sb))
		err = vfs_create(dir, path->dentry, mode, NULL);
	else {
		struct nameidata h_nd;

		memset(&h_nd, 0, sizeof(h_nd));
		h_nd.flags = LOOKUP_CREATE;
		h_nd.intent.open.flags = O_CREAT
			| vfsub_fmode_to_uint(FMODE_READ);
		h_nd.intent.open.create_mode = mode;
		h_nd.path.dentry = path->dentry->d_parent;
		h_nd.path.mnt = path->mnt;
		path_get(&h_nd.path);
		err = vfs_create(dir, path->dentry, mode, &h_nd);
		path_put(&h_nd.path);
	}

	if (!err) {
		struct path tmp = *path;
		int did;

		vfsub_update_h_iattr(&tmp, &did);
		if (did) {
			tmp.dentry = path->dentry->d_parent;
			vfsub_update_h_iattr(&tmp, /*did*/NULL);
		}
		/*ignore*/
	}

out:
	return err;
}

开发者ID:aywq2008，项目名称:omniplay，代码行数:46，代码来源:vfsub.c

示例15: IMustLock

struct dentry *vfsub_lookup_hash(struct nameidata *nd)
{
	struct path path = {
		.mnt = nd->path.mnt
	};

	IMustLock(nd->path.dentry->d_inode);

	path.dentry = lookup_hash(nd);
	if (IS_ERR(path.dentry))
		goto out;
	if (path.dentry->d_inode)
		vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/

 out:
	AuTraceErrPtr(path.dentry);
	return path.dentry;
}

/* ---------------------------------------------------------------------- */

struct dentry *vfsub_lock_rename(struct dentry *d1, struct au_hinode *hdir1,
				 struct dentry *d2, struct au_hinode *hdir2)
{
	struct dentry *d;

	lockdep_off();
	d = lock_rename(d1, d2);
	lockdep_on();
	au_hn_suspend(hdir1);
	if (hdir1 != hdir2)
		au_hn_suspend(hdir2);

	return d;
}

void vfsub_unlock_rename(struct dentry *d1, struct au_hinode *hdir1,
			 struct dentry *d2, struct au_hinode *hdir2)
{
	au_hn_resume(hdir1);
	if (hdir1 != hdir2)
		au_hn_resume(hdir2);
	lockdep_off();
	unlock_rename(d1, d2);
	lockdep_on();
}

开发者ID:chrmorais，项目名称:miniemc2，代码行数:46，代码来源:vfsub.c

示例16: vfsub_rmdir

int vfsub_rmdir(struct inode *dir, struct path *path)
{
	int err;
	struct dentry *d;

	IMustLock(dir);

	d = path->dentry;
	path->dentry = d->d_parent;
	err = security_path_rmdir(path, d);
	path->dentry = d;
	if (unlikely(err))
		goto out;

	lockdep_off();
	err = vfs_rmdir(dir, path->dentry);
	lockdep_on();
	if (!err) {
		struct path tmp = {
			.dentry	= path->dentry->d_parent,
			.mnt	= path->mnt
		};

		vfsub_update_h_iattr(&tmp, /*did*/NULL); /*ignore*/
	}

out:
	return err;
}

/* ---------------------------------------------------------------------- */

/* todo: support mmap_sem? */
ssize_t vfsub_read_u(struct file *file, char __user *ubuf, size_t count,
		     loff_t *ppos)
{
	ssize_t err;

	lockdep_off();
	err = vfs_read(file, ubuf, count, ppos);
	lockdep_on();
	if (err >= 0)
		vfsub_update_h_iattr(&file->f_path, /*did*/NULL); /*ignore*/
	return err;
}

开发者ID:aywq2008，项目名称:omniplay，代码行数:45，代码来源:vfsub.c

示例17: vfsub_atomic_open

/*
 * Ideally this function should call VFS:do_last() in order to keep all its
 * checkings. But it is very hard for aufs to regenerate several VFS internal
 * structure such as nameidata. This is a second (or third) best approach.
 * cf. linux/fs/namei.c:do_last(), lookup_open() and atomic_open().
 */
int vfsub_atomic_open(struct inode *dir, struct dentry *dentry,
		      struct vfsub_aopen_args *args, struct au_branch *br)
{
	int err;
	struct file *file = args->file;
	/* copied from linux/fs/namei.c:atomic_open() */
	struct dentry *const DENTRY_NOT_SET = (void *)-1UL;

	IMustLock(dir);
	AuDebugOn(!dir->i_op->atomic_open);

	err = au_br_test_oflag(args->open_flag, br);
	if (unlikely(err))
		goto out;

	args->file->f_path.dentry = DENTRY_NOT_SET;
	args->file->f_path.mnt = au_br_mnt(br);
	err = dir->i_op->atomic_open(dir, dentry, file, args->open_flag,
				     args->create_mode, args->opened);
	if (err >= 0) {
		/* some filesystems don't set FILE_CREATED while succeeded? */
		if (*args->opened & FILE_CREATED)
			fsnotify_create(dir, dentry);
	} else
		goto out;


	if (!err) {
		/* todo: call VFS:may_open() here */
		err = open_check_o_direct(file);
		/* todo: ima_file_check() too? */
		if (!err && (args->open_flag & __FMODE_EXEC))
			err = deny_write_access(file);
		if (unlikely(err))
			/* note that the file is created and still opened */
			goto out;
	}

	atomic_inc(&br->br_count);
	fsnotify_open(file);

out:
	return err;
}

开发者ID:shinsec，项目名称:linux-parrot，代码行数:50，代码来源:vfsub.c

示例18: IMustLock

struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
				    int len)
{
	struct path path = {
		.mnt = NULL
	};

	IMustLock(parent->d_inode);

	path.dentry = lookup_one_len(name, parent, len);
	if (IS_ERR(path.dentry))
		goto out;
	if (path.dentry->d_inode)
		vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/

out:
	AuTraceErrPtr(path.dentry);
	return path.dentry;
}

开发者ID:franjoweb，项目名称:liquid_chocolate_ics_kernel，代码行数:19，代码来源:vfsub.c

示例19: IMustLock

struct dentry *vfsub_lookup_one_len(const char *name, struct dentry *parent,
				    int len)
{
	struct path path = {
		.mnt = NULL
	};

	/* VFS checks it too, but by WARN_ON_ONCE() */
	IMustLock(d_inode(parent));

	path.dentry = lookup_one_len(name, parent, len);
	if (IS_ERR(path.dentry))
		goto out;
	if (d_is_positive(path.dentry))
		vfsub_update_h_iattr(&path, /*did*/NULL); /*ignore*/

out:
	AuTraceErrPtr(path.dentry);
	return path.dentry;
}

开发者ID:shinsec，项目名称:linux-parrot，代码行数:20，代码来源:vfsub.c

示例20: do_vfsub_create

int do_vfsub_create(struct inode *dir, struct dentry *dentry, int mode,
		    struct nameidata *nd)
{
	int err;
	struct vfsmount *mnt;

	LKTRTrace("i%lu, %.*s, 0x%x\n", dir->i_ino, AuDLNPair(dentry), mode);
	IMustLock(dir);

	err = vfs_create(dir, dentry, mode, nd);
	if (!err) {
		mnt = NULL;
		if (nd)
			mnt = nd->mnt;
		/* dir inode is locked */
		au_update_fuse_h_inode(mnt, dentry->d_parent); /*ignore*/
		au_update_fuse_h_inode(mnt, dentry); /*ignore*/
	}
	return err;
}

开发者ID:wosigh，项目名称:patches，代码行数:20，代码来源:vfsub.c

注：本文中的IMustLock函数示例由纯净天空整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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C++ IMustLock函数代码示例

示例1: epilog

示例2: au_whtmp_ren

示例3: vfsub_create

示例4: vfsub_symlink

示例5: vfsub_mknod

示例6: LKTRTrace

示例7: do_vfsub_rename

示例8: au_h_verify

示例9: au_h_verify

示例10: do_vfsub_rmdir

示例11: do_vfsub_mkdir

示例12: call_notify_change

示例13: IMustLock

示例14: vfsub_create

示例15: IMustLock

示例16: vfsub_rmdir

示例17: vfsub_atomic_open

示例18: IMustLock

示例19: IMustLock

示例20: do_vfsub_create

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