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/**
* Copyright (c) 2008-2010 Alper Akcan <alper.akcan@gmail.com>
* Copyright (c) 2009-2010 Renzo Davoli <renzo@cs.unibo.it>
*
* 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 (in the main directory of the fuse-ext2
* distribution in the file COPYING); if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "fuse-ext2.h"
int do_modetoext2lag (mode_t mode)
{
if (S_ISREG(mode)) {
return EXT2_FT_REG_FILE;
} else if (S_ISDIR(mode)) {
return EXT2_FT_DIR;
} else if (S_ISCHR(mode)) {
return EXT2_FT_CHRDEV;
} else if (S_ISBLK(mode)) {
return EXT2_FT_BLKDEV;
} else if (S_ISFIFO(mode)) {
return EXT2_FT_FIFO;
} else if (S_ISSOCK(mode)) {
return EXT2_FT_SOCK;
} else if (S_ISLNK(mode)) {
return EXT2_FT_SYMLINK;
}
return EXT2_FT_UNKNOWN;
}
static inline int old_valid_dev(dev_t dev)
{
return major(dev) < 256 && minor(dev) < 256;
}
static inline __u16 old_encode_dev(dev_t dev)
{
return (major(dev) << 8) | minor(dev);
}
static inline __u32 new_encode_dev(dev_t dev)
{
unsigned major = major(dev);
unsigned minor = minor(dev);
return (minor & 0xff) | (major << 8) | ((minor & ~0xff) << 12);
}
int do_create (ext2_filsys e2fs, const char *path, mode_t mode, dev_t dev, const char *fastsymlink)
{
int rt;
time_t tm;
errcode_t rc;
char *p_path;
char *r_path;
ext2_ino_t ino;
struct ext2_inode inode;
ext2_ino_t n_ino;
struct fuse_context *ctx;
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
rt=do_check_split(path, &p_path, &r_path);
debugf("parent: %s, child: %s", p_path, r_path);
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); failed", p_path);
free_split(p_path, r_path);
return rt;
}
rc = ext2fs_new_inode(e2fs, ino, mode, 0, &n_ino);
if (rc) {
debugf("ext2fs_new_inode(ep.fs, ino, mode, 0, &n_ino); failed");
return -ENOMEM;
}
do {
debugf("calling ext2fs_link(e2fs, %d, %s, %d, %d);", ino, r_path, n_ino, do_modetoext2lag(mode));
rc = ext2fs_link(e2fs, ino, r_path, n_ino, do_modetoext2lag(mode));
if (rc == EXT2_ET_DIR_NO_SPACE) {
debugf("calling ext2fs_expand_dir(e2fs, &d)", ino);
if (ext2fs_expand_dir(e2fs, ino)) {
debugf("error while expanding directory %s (%d)", p_path, ino);
free_split(p_path, r_path);
return -ENOSPC;
}
}
} while (rc == EXT2_ET_DIR_NO_SPACE);
if (rc) {
debugf("ext2fs_link(e2fs, %d, %s, %d, %d); failed", ino, r_path, n_ino, do_modetoext2lag(mode));
free_split(p_path, r_path);
return -EIO;
}
if (ext2fs_test_inode_bitmap(e2fs->inode_map, n_ino)) {
debugf("inode already set");
}
ext2fs_inode_alloc_stats2(e2fs, n_ino, +1, 0);
memset(&inode, 0, sizeof(inode));
tm = e2fs->now ? e2fs->now : time(NULL);
inode.i_mode = mode;
inode.i_atime = inode.i_ctime = inode.i_mtime = tm;
inode.i_links_count = 1;
inode.i_size = 0;
ctx = fuse_get_context();
if (ctx) {
inode.i_uid = ctx->uid;
inode.i_gid = ctx->gid;
}
if (S_ISCHR(mode) || S_ISBLK(mode)) {
if (old_valid_dev(dev))
inode.i_block[0]= ext2fs_cpu_to_le32(old_encode_dev(dev));
else
inode.i_block[1]= ext2fs_cpu_to_le32(new_encode_dev(dev));
}
if (S_ISLNK(mode) && fastsymlink != NULL) {
inode.i_size = strlen(fastsymlink);
strncpy((char *)&(inode.i_block[0]),fastsymlink,
(EXT2_N_BLOCKS * sizeof(inode.i_block[0])));
}
rc = ext2fs_write_new_inode(e2fs, n_ino, &inode);
if (rc) {
debugf("ext2fs_write_new_inode(e2fs, n_ino, &inode);");
free_split(p_path, r_path);
return -EIO;
}
/* update parent dir */
rt = do_readinode(e2fs, p_path, &ino, &inode);
if (rt) {
debugf("do_readinode(%s, &ino, &inode); dailed", p_path);
free_split(p_path, r_path);
return -EIO;
}
inode.i_ctime = inode.i_mtime = tm;
rc = ext2fs_write_inode(e2fs, ino, &inode);
if (rc) {
debugf("ext2fs_write_inode(e2fs, ino, &inode); failed");
free_split(p_path, r_path);
return -EIO;
}
free_split(p_path, r_path);
debugf("leave");
return 0;
}
int op_create (const char *path, mode_t mode, struct fuse_file_info *fi)
{
int rt;
struct ext2_vnode * vnode;
ext2_filsys e2fs;
FUSE_EXT2_LOCK;
e2fs = current_ext2fs();
debugf("enter");
debugf("path = %s, mode: 0%o", path, mode);
fi->fh = (unsigned long) (vnode = do_open(e2fs, path, fi->flags));
if (vnode != NULL) {
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
rt = do_create(e2fs, path, mode, 0, NULL);
if (rt != 0) {
FUSE_EXT2_UNLOCK;
return rt;
}
fi->fh = (unsigned long) (vnode = do_open(e2fs, path, fi->flags));
if (vnode == NULL) {
debugf("op_open(path, fi); failed");
FUSE_EXT2_UNLOCK;
return -EIO;
}
debugf("leave");
FUSE_EXT2_UNLOCK;
return 0;
}
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