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new: bmap() -- safe swap file support, LILO bootability (Szeredi, Szaka)

master N2006_11_14_010037
szaka 2006-11-13 23:05:36 +00:00
parent 6c120f3d35
commit 1fe361a4b7
1 changed files with 71 additions and 4 deletions
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75
src/ntfs-3g.c
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@ -1194,6 +1194,52 @@ static int ntfs_fuse_utime(const char *path, struct utimbuf *buf)
return 0;
}
static int ntfs_fuse_bmap(const char *path, size_t blocksize, uint64_t *idx)
{
ntfs_inode *ni;
ntfs_attr *na;
LCN lcn;
int ret, cl_per_bl = ctx->vol->cluster_size / blocksize;
if (blocksize > ctx->vol->cluster_size)
return -EINVAL;
if (ntfs_fuse_is_named_data_stream(path))
return -EINVAL;
ni = ntfs_pathname_to_inode(ctx->vol, NULL, path);
if (!ni)
return -errno;
na = ntfs_attr_open(ni, AT_DATA, AT_UNNAMED, 0);
if (!na) {
ret = -errno;
goto close_inode;
}
if (NAttrCompressed(na) || NAttrEncrypted(na) || !NAttrNonResident(na)){
ret = -EINVAL;
goto close_attr;
}
if (ntfs_attr_map_whole_runlist(na)) {
ret = -errno;
goto close_attr;
}
lcn = ntfs_rl_vcn_to_lcn(na->rl, *idx / cl_per_bl);
*idx = (lcn > 0) ? lcn * cl_per_bl + *idx % cl_per_bl : 0;
ret = 0;
close_attr:
ntfs_attr_close(na);
close_inode:
if (ntfs_inode_close(ni))
ntfs_log_perror("bmap: failed to close inode");
return ret;
}
#ifdef HAVE_SETXATTR
static const char nf_ns_xattr_preffix[] = "user.";
@ -1518,6 +1564,7 @@ static struct fuse_operations ntfs_fuse_oper = {
.mkdir = ntfs_fuse_mkdir,
.rmdir = ntfs_fuse_rmdir,
.utime = ntfs_fuse_utime,
.bmap = ntfs_fuse_bmap,
.destroy = ntfs_fuse_destroy2,
#ifdef HAVE_SETXATTR
.getxattr = ntfs_fuse_getxattr,
@ -1945,6 +1992,29 @@ free_args:
}
static void set_fuseblk_options(char *parsed_options)
{
char option[32];
long pagesize;
u32 blksize = ctx->vol->cluster_size;
if (!NDevBlock(ctx->vol->dev))
return;
pagesize = sysconf(_SC_PAGESIZE);
if (pagesize < 1)
pagesize = 4096;
if (blksize > pagesize)
blksize = pagesize;
snprintf(option, sizeof(option), ",blksize=%u", blksize);
/* parsed_options already allocated enough space. */
strcat(parsed_options, ",blkdev");
strcat(parsed_options, option);
}
int main(int argc, char *argv[])
{
char *parsed_options;
@ -1975,10 +2045,7 @@ int main(int argc, char *argv[])
return 4;
}
if (NDevBlock(ctx->vol->dev)) {
/* parsed_options already allocated enough space. */
strcat(parsed_options, ",blkdev");
}
set_fuseblk_options(parsed_options);
/* Libfuse can't always find fusermount, so let's help it. */
if (setenv("PATH", ":/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin", 0))