static void local_mapped_file_attr(FsContext *ctx, const char *path,
struct stat *stbuf)
{
FILE *fp;
char buf[ATTR_MAX];
char *attr_path;
attr_path = local_mapped_attr_path(ctx, path);
fp = local_fopen(attr_path, "r");
g_free(attr_path);
if (!fp) {
return;
}
memset(buf, 0, ATTR_MAX);
while (fgets(buf, ATTR_MAX, fp)) {
if (!strncmp(buf, "virtfs.uid", 10)) {
stbuf->st_uid = atoi(buf+11);
} else if (!strncmp(buf, "virtfs.gid", 10)) {
stbuf->st_gid = atoi(buf+11);
} else if (!strncmp(buf, "virtfs.mode", 11)) {
stbuf->st_mode = atoi(buf+12);
} else if (!strncmp(buf, "virtfs.rdev", 11)) {
stbuf->st_rdev = atoi(buf+12);
}
memset(buf, 0, ATTR_MAX);
}
fclose(fp);
}
static int local_rename(FsContext *ctx, const char *oldpath,
const char *newpath)
{
int err;
char buffer[PATH_MAX], buffer1[PATH_MAX];
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
err = local_create_mapped_attr_dir(ctx, newpath);
if (err < 0) {
return err;
}
/* rename the .virtfs_metadata files */
err = rename(local_mapped_attr_path(ctx, oldpath, buffer),
local_mapped_attr_path(ctx, newpath, buffer1));
if (err < 0 && errno != ENOENT) {
return err;
}
}
return rename(rpath(ctx, oldpath, buffer), rpath(ctx, newpath, buffer1));
}
static int local_remove(FsContext *ctx, const char *path)
{
int err;
struct stat stbuf;
char *buffer;
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
buffer = rpath(ctx, path);
err = lstat(buffer, &stbuf);
g_free(buffer);
if (err) {
goto err_out;
}
/*
* If directory remove .virtfs_metadata contained in the
* directory
*/
if (S_ISDIR(stbuf.st_mode)) {
buffer = g_strdup_printf("%s/%s/%s", ctx->fs_root,
path, VIRTFS_META_DIR);
err = remove(buffer);
g_free(buffer);
if (err < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
/*
* Now remove the name from parent directory
* .virtfs_metadata directory
*/
buffer = local_mapped_attr_path(ctx, path);
err = remove(buffer);
g_free(buffer);
if (err < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
buffer = rpath(ctx, path);
err = remove(buffer);
g_free(buffer);
err_out:
return err;
}
static int local_unlinkat(FsContext *ctx, V9fsPath *dir,
const char *name, int flags)
{
int ret;
V9fsString fullname;
char *buffer;
v9fs_string_init(&fullname);
v9fs_string_sprintf(&fullname, "%s/%s", dir->data, name);
if (ctx->export_flags & V9FS_SM_MAPPED_FILE) {
if (flags == AT_REMOVEDIR) {
/*
* If directory remove .virtfs_metadata contained in the
* directory
*/
buffer = g_strdup_printf("%s/%s/%s", ctx->fs_root,
fullname.data, VIRTFS_META_DIR);
ret = remove(buffer);
g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
/*
* Now remove the name from parent directory
* .virtfs_metadata directory.
*/
buffer = local_mapped_attr_path(ctx, fullname.data);
ret = remove(buffer);
g_free(buffer);
if (ret < 0 && errno != ENOENT) {
/*
* We didn't had the .virtfs_metadata file. May be file created
* in non-mapped mode ?. Ignore ENOENT.
*/
goto err_out;
}
}
/* Remove the name finally */
buffer = rpath(ctx, fullname.data);
ret = remove(buffer);
g_free(buffer);
err_out:
v9fs_string_free(&fullname);
return ret;
}
static int local_link(FsContext *ctx, V9fsPath *oldpath,
V9fsPath *dirpath, const char *name)
{
int ret;
V9fsString newpath;
char *buffer, *buffer1;
v9fs_string_init(&newpath);
v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
buffer = rpath(ctx, oldpath->data);
buffer1 = rpath(ctx, newpath.data);
ret = link(buffer, buffer1);
g_free(buffer);
g_free(buffer1);
/* now link the virtfs_metadata files */
if (!ret && (ctx->export_flags & V9FS_SM_MAPPED_FILE)) {
/* Link the .virtfs_metadata files. Create the metada directory */
ret = local_create_mapped_attr_dir(ctx, newpath.data);
if (ret < 0) {
goto err_out;
}
buffer = local_mapped_attr_path(ctx, oldpath->data);
buffer1 = local_mapped_attr_path(ctx, newpath.data);
ret = link(buffer, buffer1);
g_free(buffer);
g_free(buffer1);
if (ret < 0 && errno != ENOENT) {
goto err_out;
}
}
err_out:
v9fs_string_free(&newpath);
return ret;
}
static int local_set_mapped_file_attr(FsContext *ctx,
const char *path, FsCred *credp)
{
FILE *fp;
int ret = 0;
char buf[ATTR_MAX];
char attr_path[PATH_MAX];
int uid = -1, gid = -1, mode = -1, rdev = -1;
fp = local_fopen(local_mapped_attr_path(ctx, path, attr_path), "r");
if (!fp) {
goto create_map_file;
}
memset(buf, 0, ATTR_MAX);
while (fgets(buf, ATTR_MAX, fp)) {
if (!strncmp(buf, "virtfs.uid", 10)) {
uid = atoi(buf+11);
} else if (!strncmp(buf, "virtfs.gid", 10)) {
gid = atoi(buf+11);
} else if (!strncmp(buf, "virtfs.mode", 11)) {
mode = atoi(buf+12);
} else if (!strncmp(buf, "virtfs.rdev", 11)) {
rdev = atoi(buf+12);
}
memset(buf, 0, ATTR_MAX);
}
fclose(fp);
goto update_map_file;
create_map_file:
ret = local_create_mapped_attr_dir(ctx, path);
if (ret < 0) {
goto err_out;
}
update_map_file:
fp = local_fopen(attr_path, "w");
if (!fp) {
ret = -1;
goto err_out;
}
if (credp->fc_uid != -1) {
uid = credp->fc_uid;
}
if (credp->fc_gid != -1) {
gid = credp->fc_gid;
}
if (credp->fc_mode != -1) {
mode = credp->fc_mode;
}
if (credp->fc_rdev != -1) {
rdev = credp->fc_rdev;
}
if (uid != -1) {
fprintf(fp, "virtfs.uid=%d\n", uid);
}
if (gid != -1) {
fprintf(fp, "virtfs.gid=%d\n", gid);
}
if (mode != -1) {
fprintf(fp, "virtfs.mode=%d\n", mode);
}
if (rdev != -1) {
fprintf(fp, "virtfs.rdev=%d\n", rdev);
}
fclose(fp);
err_out:
return ret;
}
