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fileobj/devobj: record path name (originally by Takagi-san)

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This commit is contained in:
Balazs Gerofi
2018-04-13 15:14:53 +09:00
parent 249bda4aef
commit f3d18eb9de
5 changed files with 87 additions and 4 deletions
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54
executer/kernel/mcctrl/syscall.c
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@ -1182,6 +1182,7 @@ struct pager_create_result {
int maxprot;
uint32_t flags;
size_t size;
char path[PATH_MAX];
};
enum {
@ -1200,6 +1201,33 @@ enum {
MF_END
};
static int pager_get_path(struct file *file, char *path) {
int error = 0;
char *pathbuf, *fullpath;
pathbuf = kmalloc(PATH_MAX, GFP_TEMPORARY);
if (!pathbuf) {
printk("%s: ERROR: allocating path\n", __FUNCTION__);
error = -ENOMEM;
goto out;
}
fullpath = d_path(&file->f_path, pathbuf, PATH_MAX);
if (!IS_ERR(fullpath)) {
memcpy(path, fullpath, strlen(fullpath));
}
else {
path[0] = 0;
}
out:
if (pathbuf) {
kfree(pathbuf);
}
return error;
}
static int pager_req_create(ihk_os_t os, int fd, uintptr_t result_pa)
{
ihk_device_t dev = ihk_os_to_dev(os);
@ -1333,6 +1361,7 @@ found:
phys = ihk_device_map_memory(dev, result_pa, sizeof(*resp));
resp = ihk_device_map_virtual(dev, phys, sizeof(*resp), NULL, 0);
if (!resp) {
ihk_device_unmap_memory(dev, phys, sizeof(*resp));
printk("%s: ERROR: invalid response structure address\n",
__FUNCTION__);
error = -EINVAL;
@ -1343,10 +1372,18 @@ found:
resp->maxprot = maxprot;
resp->flags = mf_flags;
resp->size = st.size;
error = pager_get_path(file, resp->path);
if (error) {
goto out_unmap;
}
error = 0;
out_unmap:
ihk_device_unmap_virtual(dev, resp, sizeof(*resp));
ihk_device_unmap_memory(dev, phys, sizeof(*resp));
error = 0;
out:
if (newpager) {
kfree(newpager);
@ -1578,6 +1615,7 @@ struct pager_map_result {
uintptr_t handle;
int maxprot;
int8_t padding[4];
char path[PATH_MAX];
};
static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off,
@ -1665,6 +1703,7 @@ static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off,
phys = ihk_device_map_memory(dev, result_rpa, sizeof(*resp));
resp = ihk_device_map_virtual(dev, phys, sizeof(*resp), NULL, 0);
if (!resp) {
ihk_device_unmap_memory(dev, phys, sizeof(*resp));
printk("%s: ERROR: invalid response structure address\n",
__FUNCTION__);
error = -EINVAL;
@ -1673,13 +1712,16 @@ static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off,
resp->handle = (uintptr_t)pager;
resp->maxprot = maxprot;
ihk_device_unmap_virtual(dev, resp, sizeof(*resp));
ihk_device_unmap_memory(dev, phys, sizeof(*resp));
error = pager_get_path(file, resp->path);
if (error) {
goto out_unmap;
}
error = down_interruptible(&ppd->devobj_pager_lock);
if (error) {
error = -EINTR;
goto out;
goto out_unmap;
}
list_add_tail(&pager->list, &ppd->devobj_pager_list);
@ -1688,6 +1730,10 @@ static int pager_req_map(ihk_os_t os, int fd, size_t len, off_t off,
pager = 0;
error = 0;
out_unmap:
ihk_device_unmap_virtual(dev, resp, sizeof(*resp));
ihk_device_unmap_memory(dev, phys, sizeof(*resp));
out:
if (file) {
fput(file);