Release 4.10 fs/9p/vfs_inode.c

/*
 *  linux/fs/9p/vfs_inode.c
 *
 * This file contains vfs inode ops for the 9P2000 protocol.
 *
 *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
 *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2
 *  as published by the Free Software Foundation.
 *
 *  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:
 *  Free Software Foundation
 *  51 Franklin Street, Fifth Floor
 *  Boston, MA  02111-1301  USA
 *
 */


#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt

#include <linux/module.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/file.h>
#include <linux/pagemap.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/inet.h>
#include <linux/namei.h>
#include <linux/idr.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/xattr.h>
#include <linux/posix_acl.h>
#include <net/9p/9p.h>
#include <net/9p/client.h>

#include "v9fs.h"
#include "v9fs_vfs.h"
#include "fid.h"
#include "cache.h"
#include "xattr.h"
#include "acl.h"


static const struct inode_operations v9fs_dir_inode_operations;

static const struct inode_operations v9fs_dir_inode_operations_dotu;

static const struct inode_operations v9fs_file_inode_operations;

static const struct inode_operations v9fs_symlink_inode_operations;

/**
 * unixmode2p9mode - convert unix mode bits to plan 9
 * @v9ses: v9fs session information
 * @mode: mode to convert
 *
 */



static u32 unixmode2p9mode(struct v9fs_session_info *v9ses, umode_t mode)
{
	int res;
	res = mode & 0777;
	if (S_ISDIR(mode))
		res |= P9_DMDIR;
	if (v9fs_proto_dotu(v9ses)) {
		if (v9ses->nodev == 0) {
			if (S_ISSOCK(mode))
				res |= P9_DMSOCKET;
			if (S_ISFIFO(mode))
				res |= P9_DMNAMEDPIPE;
			if (S_ISBLK(mode))
				res |= P9_DMDEVICE;
			if (S_ISCHR(mode))
				res |= P9_DMDEVICE;
		}

		if ((mode & S_ISUID) == S_ISUID)
			res |= P9_DMSETUID;
		if ((mode & S_ISGID) == S_ISGID)
			res |= P9_DMSETGID;
		if ((mode & S_ISVTX) == S_ISVTX)
			res |= P9_DMSETVTX;
	}
	return res;
}

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eric van hensbergen
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anthony liguori
anthony liguori
9
6.34%
1
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latchesar ionkov
latchesar ionkov
9
6.34%
2
28.57%
al viro
al viro
2
1.41%
2
28.57%
sripathi kodi
sripathi kodi
1
0.70%
1
14.29%
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142
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7
100.00%

/**
 * p9mode2perm- convert plan9 mode bits to unix permission bits
 * @v9ses: v9fs session information
 * @stat: p9_wstat from which mode need to be derived
 *
 */


static int p9mode2perm(struct v9fs_session_info *v9ses,
		       struct p9_wstat *stat)
{
	int res;
	int mode = stat->mode;

	res = mode & S_IALLUGO;
	if (v9fs_proto_dotu(v9ses)) {
		if ((mode & P9_DMSETUID) == P9_DMSETUID)
			res |= S_ISUID;

		if ((mode & P9_DMSETGID) == P9_DMSETGID)
			res |= S_ISGID;

		if ((mode & P9_DMSETVTX) == P9_DMSETVTX)
			res |= S_ISVTX;
	}
	return res;
}

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/**
 * p9mode2unixmode- convert plan9 mode bits to unix mode bits
 * @v9ses: v9fs session information
 * @stat: p9_wstat from which mode need to be derived
 * @rdev: major number, minor number in case of device files.
 *
 */


static umode_t p9mode2unixmode(struct v9fs_session_info *v9ses,
			       struct p9_wstat *stat, dev_t *rdev)
{
	int res;
	u32 mode = stat->mode;

	*rdev = 0;
	res = p9mode2perm(v9ses, stat);

	if ((mode & P9_DMDIR) == P9_DMDIR)
		res |= S_IFDIR;
	else if ((mode & P9_DMSYMLINK) && (v9fs_proto_dotu(v9ses)))
		res |= S_IFLNK;
	else if ((mode & P9_DMSOCKET) && (v9fs_proto_dotu(v9ses))
		 && (v9ses->nodev == 0))
		res |= S_IFSOCK;
	else if ((mode & P9_DMNAMEDPIPE) && (v9fs_proto_dotu(v9ses))
		 && (v9ses->nodev == 0))
		res |= S_IFIFO;
	else if ((mode & P9_DMDEVICE) && (v9fs_proto_dotu(v9ses))
		 && (v9ses->nodev == 0)) {
		char type = 0, ext[32];
		int major = -1, minor = -1;

		strlcpy(ext, stat->extension, sizeof(ext));
		sscanf(ext, "%c %i %i", &type, &major, &minor);
		switch (type) {
		case 'c':
			res |= S_IFCHR;
			break;
		case 'b':
			res |= S_IFBLK;
			break;
		default:
			p9_debug(P9_DEBUG_ERROR, "Unknown special type %c %s\n",
				 type, stat->extension);
		};
		*rdev = MKDEV(major, minor);
	} else
		res |= S_IFREG;

	return res;
}

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eric van hensbergen
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aneesh kumar
aneesh kumar
120
45.11%
2
20.00%
latchesar ionkov
latchesar ionkov
14
5.26%
2
20.00%
sripathi kodi
sripathi kodi
4
1.50%
1
10.00%
al viro
al viro
2
0.75%
1
10.00%
toralf foerster
toralf foerster
1
0.38%
1
10.00%
joe perches
joe perches
1
0.38%
1
10.00%
chen gang
chen gang
1
0.38%
1
10.00%
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266
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10
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/**
 * v9fs_uflags2omode- convert posix open flags to plan 9 mode bits
 * @uflags: flags to convert
 * @extended: if .u extensions are active
 */



int v9fs_uflags2omode(int uflags, int extended)
{
	int ret;

	ret = 0;
	switch (uflags&3) {
	default:
	case O_RDONLY:
		ret = P9_OREAD;
		break;

	case O_WRONLY:
		ret = P9_OWRITE;
		break;

	case O_RDWR:
		ret = P9_ORDWR;
		break;
	}

	if (extended) {
		if (uflags & O_EXCL)
			ret |= P9_OEXCL;

		if (uflags & O_APPEND)
			ret |= P9_OAPPEND;
	}

	return ret;
}

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latchesar ionkov
latchesar ionkov
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2
66.67%
eric van hensbergen
eric van hensbergen
11
13.75%
1
33.33%
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80
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3
100.00%

/**
 * v9fs_blank_wstat - helper function to setup a 9P stat structure
 * @wstat: structure to initialize
 *
 */


void

v9fs_blank_wstat(struct p9_wstat *wstat)
{
	wstat->type = ~0;
	wstat->dev = ~0;
	wstat->qid.type = ~0;
	wstat->qid.version = ~0;
	*((long long *)&wstat->qid.path) = ~0;
	wstat->mode = ~0;
	wstat->atime = ~0;
	wstat->mtime = ~0;
	wstat->length = ~0;
	wstat->name = NULL;
	wstat->uid = NULL;
	wstat->gid = NULL;
	wstat->muid = NULL;
	wstat->n_uid = INVALID_UID;
	wstat->n_gid = INVALID_GID;
	wstat->n_muid = INVALID_UID;
	wstat->extension = NULL;
}

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eric van hensbergen
eric van hensbergen
108
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1
25.00%
latchesar ionkov
latchesar ionkov
25
18.38%
2
50.00%
eric w. biederman
eric w. biederman
3
2.21%
1
25.00%
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136
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4
100.00%

/**
 * v9fs_alloc_inode - helper function to allocate an inode
 *
 */


struct inode *v9fs_alloc_inode(struct super_block *sb)
{
	struct v9fs_inode *v9inode;
	v9inode = (struct v9fs_inode *)kmem_cache_alloc(v9fs_inode_cache,
							GFP_KERNEL);
	if (!v9inode)
		return NULL;
#ifdef CONFIG_9P_FSCACHE
	v9inode->fscache = NULL;
	mutex_init(&v9inode->fscache_lock);
#endif
	v9inode->writeback_fid = NULL;
	v9inode->cache_validity = 0;
	mutex_init(&v9inode->v_mutex);
	return &v9inode->vfs_inode;
}

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47
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aneesh kumar
36
42.86%
4
66.67%
sasha levin
sasha levin
1
1.19%
1
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/**
 * v9fs_destroy_inode - destroy an inode
 *
 */



static void v9fs_i_callback(struct rcu_head *head)
{
	struct inode *inode = container_of(head, struct inode, i_rcu);
	kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
}

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nick piggin
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abhishek kulkarni
15
41.67%
1
33.33%
aneesh kumar
aneesh kumar
2
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void v9fs_destroy_inode(struct inode *inode)
{
	call_rcu(&inode->i_rcu, v9fs_i_callback);
}

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int v9fs_init_inode(struct v9fs_session_info *v9ses,
		    struct inode *inode, umode_t mode, dev_t rdev)
{
	int err = 0;

	inode_init_owner(inode, NULL, mode);
	inode->i_blocks = 0;
	inode->i_rdev = rdev;
	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
	inode->i_mapping->a_ops = &v9fs_addr_operations;

	switch (mode & S_IFMT) {
	case S_IFIFO:
	case S_IFBLK:
	case S_IFCHR:
	case S_IFSOCK:
		if (v9fs_proto_dotl(v9ses)) {
			inode->i_op = &v9fs_file_inode_operations_dotl;
		} else if (v9fs_proto_dotu(v9ses)) {
			inode->i_op = &v9fs_file_inode_operations;
		} else {
			p9_debug(P9_DEBUG_ERROR,
				 "special files without extended mode\n");
			err = -EINVAL;
			goto error;
		}
		init_special_inode(inode, inode->i_mode, inode->i_rdev);
		break;
	case S_IFREG:
		if (v9fs_proto_dotl(v9ses)) {
			inode->i_op = &v9fs_file_inode_operations_dotl;
			if (v9ses->cache == CACHE_LOOSE ||
			    v9ses->cache == CACHE_FSCACHE)
				inode->i_fop =
					&v9fs_cached_file_operations_dotl;
			else if (v9ses->cache == CACHE_MMAP)
				inode->i_fop = &v9fs_mmap_file_operations_dotl;
			else
				inode->i_fop = &v9fs_file_operations_dotl;
		} else {
			inode->i_op = &v9fs_file_inode_operations;
			if (v9ses->cache == CACHE_LOOSE ||
			    v9ses->cache == CACHE_FSCACHE)
				inode->i_fop =
					&v9fs_cached_file_operations;
			else if (v9ses->cache == CACHE_MMAP)
				inode->i_fop = &v9fs_mmap_file_operations;
			else
				inode->i_fop = &v9fs_file_operations;
		}

		break;
	case S_IFLNK:
		if (!v9fs_proto_dotu(v9ses) && !v9fs_proto_dotl(v9ses)) {
			p9_debug(P9_DEBUG_ERROR,
				 "extended modes used with legacy protocol\n");
			err = -EINVAL;
			goto error;
		}

		if (v9fs_proto_dotl(v9ses))
			inode->i_op = &v9fs_symlink_inode_operations_dotl;
		else
			inode->i_op = &v9fs_symlink_inode_operations;

		break;
	case S_IFDIR:
		inc_nlink(inode);
		if (v9fs_proto_dotl(v9ses))
			inode->i_op = &v9fs_dir_inode_operations_dotl;
		else if (v9fs_proto_dotu(v9ses))
			inode->i_op = &v9fs_dir_inode_operations_dotu;
		else
			inode->i_op = &v9fs_dir_inode_operations;

		if (v9fs_proto_dotl(v9ses))
			inode->i_fop = &v9fs_dir_operations_dotl;
		else
			inode->i_fop = &v9fs_dir_operations;

		break;
	default:
		p9_debug(P9_DEBUG_ERROR, "BAD mode 0x%hx S_IFMT 0x%x\n",
			 mode, mode & S_IFMT);
		err = -EINVAL;
		goto error;
	}
error:
	return err;

}

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latchesar ionkov
latchesar ionkov
119
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3
16.67%
sripathi kodi
sripathi kodi
81
18.84%
2
11.11%
eric van hensbergen
eric van hensbergen
69
16.05%
2
11.11%
dominique martinet
dominique martinet
48
11.16%
1
5.56%
aneesh kumar
aneesh kumar
46
10.70%
3
16.67%
m. mohan kumar
m. mohan kumar
27
6.28%
1
5.56%
abhishek kulkarni
abhishek kulkarni
21
4.88%
1
5.56%
dmitriy monakhov
dmitriy monakhov
6
1.40%
1
5.56%
deepa dinamani
deepa dinamani
4
0.93%
1
5.56%
joe perches
joe perches
4
0.93%
1
5.56%
dave hansen
dave hansen
3
0.70%
1
5.56%
al viro
al viro
2
0.47%
1
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18
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/**
 * v9fs_get_inode - helper function to setup an inode
 * @sb: superblock
 * @mode: mode to setup inode with
 *
 */



struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t rdev)
{
	int err;
	struct inode *inode;
	struct v9fs_session_info *v9ses = sb->s_fs_info;

	p9_debug(P9_DEBUG_VFS, "super block: %p mode: %ho\n", sb, mode);

	inode = new_inode(sb);
	if (!inode) {
		pr_warn("%s (%d): Problem allocating inode\n",
			__func__, task_pid_nr(current));
		return ERR_PTR(-ENOMEM);
	}
	err = v9fs_init_inode(v9ses, inode, mode, rdev);
	if (err) {
		iput(inode);
		return ERR_PTR(err);
	}
	return inode;
}

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aneesh kumar
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joe perches
joe perches
8
7.14%
1
14.29%
latchesar ionkov
latchesar ionkov
8
7.14%
1
14.29%
abhishek kulkarni
abhishek kulkarni
5
4.46%
1
14.29%
al viro
al viro
2
1.79%
1
14.29%
eric van hensbergen
eric van hensbergen
1
0.89%
1
14.29%
Total
112
100.00%
7
100.00%

/*
static struct v9fs_fid*
v9fs_clone_walk(struct v9fs_session_info *v9ses, u32 fid, struct dentry *dentry)
{
        int err;
        int nfid;
        struct v9fs_fid *ret;
        struct v9fs_fcall *fcall;

        nfid = v9fs_get_idpool(&v9ses->fidpool);
        if (nfid < 0) {
                eprintk(KERN_WARNING, "no free fids available\n");
                return ERR_PTR(-ENOSPC);
        }

        err = v9fs_t_walk(v9ses, fid, nfid, (char *) dentry->d_name.name,
                &fcall);

        if (err < 0) {
                if (fcall && fcall->id == RWALK)
                        goto clunk_fid;

                PRINT_FCALL_ERROR("walk error", fcall);
                v9fs_put_idpool(nfid, &v9ses->fidpool);
                goto error;
        }

        kfree(fcall);
        fcall = NULL;
        ret = v9fs_fid_create(v9ses, nfid);
        if (!ret) {
                err = -ENOMEM;
                goto clunk_fid;
        }

        err = v9fs_fid_insert(ret, dentry);
        if (err < 0) {
                v9fs_fid_destroy(ret);
                goto clunk_fid;
        }

        return ret;

clunk_fid:
        v9fs_t_clunk(v9ses, nfid);

error:
        kfree(fcall);
        return ERR_PTR(err);
}
*/


/**
 * v9fs_clear_inode - release an inode
 * @inode: inode to release
 *
 */


void v9fs_evict_inode(struct inode *inode)
{
	struct v9fs_inode *v9inode = V9FS_I(inode);

	truncate_inode_pages_final(&inode->i_data);
	clear_inode(inode);
	filemap_fdatawrite(&inode->i_data);

	v9fs_cache_inode_put_cookie(inode);
	/* clunk the fid stashed in writeback_fid */
	if (v9inode->writeback_fid) {
		p9_client_clunk(v9inode->writeback_fid);
		v9inode->writeback_fid = NULL;
	}
}

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aneesh kumar
aneesh kumar
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2
28.57%
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abhishek kulkarni
20
29.41%
1
14.29%
al viro
al viro
14
20.59%
2
28.57%
jan kara
jan kara
1
1.47%
1
14.29%
johannes weiner
johannes weiner
1
1.47%
1
14.29%
Total
68
100.00%
7
100.00%



static int v9fs_test_inode(struct inode *inode, void *data)
{
	int umode;
	dev_t rdev;
	struct v9fs_inode *v9inode = V9FS_I(inode);
	struct p9_wstat *st = (struct p9_wstat *)data;
	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(inode);

	umode = p9mode2unixmode(v9ses, st, &rdev);
	/* don't match inode of different type */
	if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
		return 0;

	/* compare qid details */
	if (memcmp(&v9inode->qid.version,
		   &st->qid.version, sizeof(v9inode->qid.version)))
		return 0;

	if (v9inode->qid.type != st->qid.type)
		return 0;
	return 1;
}

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137
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static int v9fs_test_new_inode(struct inode *inode, void *data)
{
	return 0;
}

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static int v9fs_set_inode(struct inode *inode,  void *data)
{
	struct v9fs_inode *v9inode = V9FS_I(inode);
	struct p9_wstat *st = (struct p9_wstat *)data;

	memcpy(&v9inode->qid, &st->qid, sizeof(st->qid));
	return 0;
}

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static struct inode *v9fs_qid_iget(struct super_block *sb,
				   struct p9_qid *qid,
				   struct p9_wstat *st,
				   int new)
{
	dev_t rdev;
	int retval;
	umode_t umode;
	unsigned long i_ino;
	struct inode *inode;
	struct v9fs_session_info *v9ses = sb->s_fs_info;
	int (*test)(struct inode *, void *);

	if (new)
		test = v9fs_test_new_inode;
	else
		test = v9fs_test_inode;

	i_ino = v9fs_qid2ino(qid);
	inode = iget5_locked(sb, i_ino, test, v9fs_set_inode, st);
	if (!inode)
		return ERR_PTR(-ENOMEM);
	if (!(inode->i_state & I_NEW))
		return inode;
	/*
         * initialize the inode with the stat info
         * FIXME!! we may need support for stale inodes
         * later.
         */
	inode->i_ino = i_ino;
	umode = p9mode2unixmode(v9ses, st, &rdev);
	retval = v9fs_init_inode(v9ses, inode, umode, rdev);
	if (retval)
		goto error;

	v9fs_stat2inode(st, inode, sb);
	v9fs_cache_inode_get_cookie(inode);
	unlock_new_inode(inode);
	return inode;
error:
	iget_failed(inode);
	return ERR_PTR(retval);

}

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aneesh kumar
aneesh kumar
127
62.87%
4
26.67%
latchesar ionkov
latchesar ionkov
45
22.28%
4
26.67%
eric van hensbergen
eric van hensbergen
17
8.42%
2
13.33%
abhishek kulkarni
abhishek kulkarni
9
4.46%
2
13.33%
al viro
al viro
3
1.49%
2
13.33%
mika kukkonen
mika kukkonen
1
0.50%
1
6.67%
Total
202
100.00%
15
100.00%


struct inode *

v9fs_inode_from_fid(struct v9fs_session_info *v9ses, struct p9_fid *fid,
		    struct super_block *sb, int new)
{
	struct p9_wstat *st;
	struct inode *inode = NULL;

	st = p9_client_stat(fid);
	if (IS_ERR(st))
		return ERR_CAST(st);

	inode = v9fs_qid_iget(sb, &st->qid, st, new);
	p9stat_free(st);
	kfree(st);
	return inode;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
aneesh kumar
aneesh kumar
68
79.07%
3
33.33%
latchesar ionkov
latchesar ionkov
13
15.12%
4
44.44%
abhishek kulkarni
abhishek kulkarni
3
3.49%
1
11.11%
eric van hensbergen
eric van hensbergen
2
2.33%
1
11.11%
Total
86
100.00%
9
100.00%

/**
 * v9fs_at_to_dotl_flags- convert Linux specific AT flags to
 * plan 9 AT flag.
 * @flags: flags to convert
 */


static int v9fs_at_to_dotl_flags(int flags)
{
	int rflags = 0;
	if (flags & AT_REMOVEDIR)
		rflags |= P9_DOTL_AT_REMOVEDIR;
	return rflags;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
aneesh kumar
aneesh kumar
27
100.00%
1
100.00%
Total
27
100.00%
1
100.00%

/**
 * v9fs_remove - helper function to remove files and directories
 * @dir: directory inode that is being deleted
 * @dentry:  dentry that is being deleted
 * @flags: removing a directory
 *
 */



static int v9fs_remove(struct inode *dir, struct dentry *dentry, int flags)
{
	struct inode *inode;
	int retval = -EOPNOTSUPP;
	struct p9_fid *v9fid, *dfid;
	struct v9fs_session_info *v9ses;

	p9_debug(P9_DEBUG_VFS, "inode: %p dentry: %p rmdir: %x\n",
		 dir, dentry, flags);

	v9ses = v9fs_inode2v9ses(dir);
	inode = d_inode(dentry);
	dfid = v9fs_parent_fid(dentry);
	if (IS_ERR(dfid)) {
		retval = PTR_ERR(dfid);
		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", retval);
		return retval;
	}
	if (v9fs_proto_dotl(v9ses))
		retval = p9_client_unlinkat(dfid, dentry->d_name.name,
					    v9fs_at_to_dotl_flags(flags));
	if (retval == -EOPNOTSUPP) {
		/* Try the one based on path */
		v9fid = v9fs_fid_clone(dentry);
		if (IS_ERR(v9fid))
			return PTR_ERR(v9fid);
		retval = p9_client_remove(v9fid);
	}
	if (!retval) {
		/*
                 * directories on unlink should have zero
                 * link count
                 */
		if (flags & AT_REMOVEDIR) {
			clear_nlink(inode);
			drop_nlink(dir);
		} else
			drop_nlink(inode);

		v9fs_invalidate_inode_attr(inode);
		v9fs_invalidate_inode_attr(dir);
	}
	return retval;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
aneesh kumar
aneesh kumar
165
77.83%
6
54.55%
sripathi kodi
sripathi kodi
40
18.87%
1
9.09%
david howells
david howells
3
1.42%
1
9.09%
joe perches
joe perches
2
0.94%
1
9.09%
al viro
al viro
1
0.47%
1
9.09%
latchesar ionkov
latchesar ionkov
1
0.47%
1
9.09%
Total
212
100.00%
11
100.00%

/**
 * v9fs_create - Create a file
 * @v9ses: session information
 * @dir: directory that dentry is being created in
 * @dentry:  dentry that is being created
 * @extension: 9p2000.u extension string to support devices, etc.
 * @perm: create permissions
 * @mode: open mode
 *
 */

static struct p9_fid *

v9fs_create(struct v9fs_session_info *v9ses, struct inode *dir,
		struct dentry *dentry, char *extension, u32 perm, u8 mode)
{
	int err;
	char *name;
	struct p9_fid *dfid, *ofid, *fid;
	struct inode *inode;

	p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);

	err = 0;
	ofid = NULL;
	fid = NULL;
	name = (char *) dentry->d_name.name;
	dfid = v9fs_parent_fid(dentry);
	if (IS_ERR(dfid)) {
		err = PTR_ERR(dfid);
		p9_debug(P9_DEBUG_VFS, "fid lookup failed %d\n", err);
		return ERR_PTR(err);
	}

	/* clone a fid to use for creation */
	ofid = clone_fid(dfid);
	if (IS_ERR(ofid)) {
		err = PTR_ERR(ofid);
		p9_debug(P9_DEBUG_VFS, "p9_client_walk failed %d\n", err);
		return ERR_PTR(err);
	}

	err = p9_client_fcreate(ofid, name, perm, mode, extension);
	if (err < 0) {
		p9_debug(P9_DEBUG_VFS, "p9_client_fcreate failed %d\n", err);
		goto error;
	}

	if (!(perm & P9_DMLINK)) {
		/* now walk from the parent so we can get unopened fid */
		fid = p9_client_walk(dfid, 1, &name, 1);
		if (IS_ERR(fid)) {
			err = PTR_ERR(fid);
			p9_debug(P9_DEBUG_VFS,
				   "p9_client_walk failed %d\n", err);
			fid = NULL;
			goto error;
		}
		/*
                 * instantiate inode and assign the unopened fid to the dentry
                 */
		inode = v9fs_get_new_inode_from_fid(v9ses, fid, dir->i_sb);
		if (IS_ERR(inode)) {
			err = PTR_ERR(inode);
			p9_debug(P9_DEBUG_VFS,
				   "inode creation failed %d\n", err);
			goto error;
		}
		v9fs_fid_add(dentry, fid);
		d_instantiate(dentry, inode);
	}
	return ofid;
error:
	if (ofid)
		p9_client_clunk(ofid);

	if (fid)
		p9_client_clunk(fid);

	return ERR_PTR(err);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
latchesar ionkov
latchesar ionkov
180
52.33%
5
31.25%
eric van hensbergen
eric van hensbergen
121
35.17%
3
18.75%
aneesh kumar
aneesh kumar
20
5.81%
3
18.75%
venkateswararao jujjuri
venkateswararao jujjuri
14
4.07%
1
6.25%
joe perches
joe perches
6
1.74%
1
6.25%
al viro
al viro
3
0.87%
3
18.75%
Total
344
100.00%
16
100.00%

/**
 * v9fs_vfs_create - VFS hook to create a regular file
 *
 * open(.., O_CREAT) is handled in v9fs_vfs_atomic_open().  This is only called
 * for mknod(2).
 *
 * @dir: directory inode that is being created
 * @dentry:  dentry that is being deleted
 * @mode: create permissions
 *
 */


static int

v9fs_vfs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
		bool excl)
{
	struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
	u32 perm = unixmode2p9mode(v9ses, mode);
	struct p9_fid *fid;

	/* P9_OEXCL? */
	fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_ORDWR);
	if (IS_ERR(fid))
		return PTR_ERR(fid);

	v9fs_invalidate_inode_attr(dir);
	p9_client_clunk(fid);

	return 0;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
venkateswararao jujjuri
venkateswararao jujjuri
38
41.76%
1
11.11%
aneesh kumar
aneesh kumar
30
32.97%
5
55.56%
miklos szeredi
miklos szeredi
20
21.98%
1
11.11%
al viro
al viro
3
3.30%
2
22.22%
Total
91
100.00%
9
100.00%

/**
 * v9fs_vfs_mkdir - VFS mkdir hook to create a directory
 * @dir:  inode that is being unlinked
 * @dentry: dentry that is being unlinked
 * @mode: mode for new directory
 *
 */



static int v9fs_vfs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
{
	int err;
	u32 perm;
	struct p9_fid *fid;
	struct v9fs_session_info *v9ses;

	p9_debug(P9_DEBUG_VFS, "name %pd\n", dentry);
	err = 0;
	v9ses = v9fs_inode2v9ses(dir);
	perm = unixmode2p9mode(v9ses, mode | S_IFDIR);
	fid = v9fs_create(v9ses, dir, dentry, NULL, perm, P9_OREAD);
	if (IS_ERR(fid)) {
		err = PTR_ERR(fid);
		fid = NULL;
	} else {
		inc_nlink(dir);
		v9fs_invalidate_inode_attr(dir);
	}

	if (fid)
		p9_client_clunk(fid);

	return err;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
miklos szeredi
miklos szeredi
71
55.47%
1
14.29%
aneesh kumar
aneesh kumar
30
23.44%
4
57.14%
venkateswararao jujjuri
venkateswararao jujjuri
26
20.31%
1
14.29%
al viro
al viro
1
0.78%
1
14.29%
Total
128
100.00%
7
100.00%

/**
 * v9fs_vfs_lookup - VFS lookup hook to "walk" to a new inode
 * @dir:  inode that is being walked from
 * @dentry: dentry that is being walked to?
 * @flags: lookup flags (unused)
 *
 */



struct dentry *v9fs_vfs_lookup(struct inode *dir, struct dentry *dentry,
				      unsigned int flags)
{
	struct dentry *res;
	struct v9fs_session_info *