mirror of
https://github.com/torvalds/linux.git
synced 2024-12-07 19:41:31 +00:00
4c42be38c2
Since the new pair function is introduced, we can call them to clean the code in orangefs. Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Tested-by: Mike Marshall <hubcap@omnibond.com> Reviewed-by: Andrew Morton <akpm@linux-foundation.org> Cc: Martin Brandenburg <martin@omnibond.com> Link: http://lkml.kernel.org/r/20200517214718.468-9-guoqing.jiang@cloud.ionos.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
1127 lines
28 KiB
C
1127 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* (C) 2001 Clemson University and The University of Chicago
|
|
* Copyright 2018 Omnibond Systems, L.L.C.
|
|
*
|
|
* See COPYING in top-level directory.
|
|
*/
|
|
|
|
/*
|
|
* Linux VFS inode operations.
|
|
*/
|
|
|
|
#include <linux/bvec.h>
|
|
#include "protocol.h"
|
|
#include "orangefs-kernel.h"
|
|
#include "orangefs-bufmap.h"
|
|
|
|
static int orangefs_writepage_locked(struct page *page,
|
|
struct writeback_control *wbc)
|
|
{
|
|
struct inode *inode = page->mapping->host;
|
|
struct orangefs_write_range *wr = NULL;
|
|
struct iov_iter iter;
|
|
struct bio_vec bv;
|
|
size_t len, wlen;
|
|
ssize_t ret;
|
|
loff_t off;
|
|
|
|
set_page_writeback(page);
|
|
|
|
len = i_size_read(inode);
|
|
if (PagePrivate(page)) {
|
|
wr = (struct orangefs_write_range *)page_private(page);
|
|
WARN_ON(wr->pos >= len);
|
|
off = wr->pos;
|
|
if (off + wr->len > len)
|
|
wlen = len - off;
|
|
else
|
|
wlen = wr->len;
|
|
} else {
|
|
WARN_ON(1);
|
|
off = page_offset(page);
|
|
if (off + PAGE_SIZE > len)
|
|
wlen = len - off;
|
|
else
|
|
wlen = PAGE_SIZE;
|
|
}
|
|
/* Should've been handled in orangefs_invalidatepage. */
|
|
WARN_ON(off == len || off + wlen > len);
|
|
|
|
bv.bv_page = page;
|
|
bv.bv_len = wlen;
|
|
bv.bv_offset = off % PAGE_SIZE;
|
|
WARN_ON(wlen == 0);
|
|
iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
|
|
|
|
ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
|
|
len, wr, NULL, NULL);
|
|
if (ret < 0) {
|
|
SetPageError(page);
|
|
mapping_set_error(page->mapping, ret);
|
|
} else {
|
|
ret = 0;
|
|
}
|
|
kfree(detach_page_private(page));
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
|
|
{
|
|
int ret;
|
|
ret = orangefs_writepage_locked(page, wbc);
|
|
unlock_page(page);
|
|
end_page_writeback(page);
|
|
return ret;
|
|
}
|
|
|
|
struct orangefs_writepages {
|
|
loff_t off;
|
|
size_t len;
|
|
kuid_t uid;
|
|
kgid_t gid;
|
|
int maxpages;
|
|
int npages;
|
|
struct page **pages;
|
|
struct bio_vec *bv;
|
|
};
|
|
|
|
static int orangefs_writepages_work(struct orangefs_writepages *ow,
|
|
struct writeback_control *wbc)
|
|
{
|
|
struct inode *inode = ow->pages[0]->mapping->host;
|
|
struct orangefs_write_range *wrp, wr;
|
|
struct iov_iter iter;
|
|
ssize_t ret;
|
|
size_t len;
|
|
loff_t off;
|
|
int i;
|
|
|
|
len = i_size_read(inode);
|
|
|
|
for (i = 0; i < ow->npages; i++) {
|
|
set_page_writeback(ow->pages[i]);
|
|
ow->bv[i].bv_page = ow->pages[i];
|
|
ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
|
|
ow->off + ow->len) -
|
|
max(ow->off, page_offset(ow->pages[i]));
|
|
if (i == 0)
|
|
ow->bv[i].bv_offset = ow->off -
|
|
page_offset(ow->pages[i]);
|
|
else
|
|
ow->bv[i].bv_offset = 0;
|
|
}
|
|
iov_iter_bvec(&iter, WRITE, ow->bv, ow->npages, ow->len);
|
|
|
|
WARN_ON(ow->off >= len);
|
|
if (ow->off + ow->len > len)
|
|
ow->len = len - ow->off;
|
|
|
|
off = ow->off;
|
|
wr.uid = ow->uid;
|
|
wr.gid = ow->gid;
|
|
ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
|
|
0, &wr, NULL, NULL);
|
|
if (ret < 0) {
|
|
for (i = 0; i < ow->npages; i++) {
|
|
SetPageError(ow->pages[i]);
|
|
mapping_set_error(ow->pages[i]->mapping, ret);
|
|
if (PagePrivate(ow->pages[i])) {
|
|
wrp = (struct orangefs_write_range *)
|
|
page_private(ow->pages[i]);
|
|
ClearPagePrivate(ow->pages[i]);
|
|
put_page(ow->pages[i]);
|
|
kfree(wrp);
|
|
}
|
|
end_page_writeback(ow->pages[i]);
|
|
unlock_page(ow->pages[i]);
|
|
}
|
|
} else {
|
|
ret = 0;
|
|
for (i = 0; i < ow->npages; i++) {
|
|
if (PagePrivate(ow->pages[i])) {
|
|
wrp = (struct orangefs_write_range *)
|
|
page_private(ow->pages[i]);
|
|
ClearPagePrivate(ow->pages[i]);
|
|
put_page(ow->pages[i]);
|
|
kfree(wrp);
|
|
}
|
|
end_page_writeback(ow->pages[i]);
|
|
unlock_page(ow->pages[i]);
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_writepages_callback(struct page *page,
|
|
struct writeback_control *wbc, void *data)
|
|
{
|
|
struct orangefs_writepages *ow = data;
|
|
struct orangefs_write_range *wr;
|
|
int ret;
|
|
|
|
if (!PagePrivate(page)) {
|
|
unlock_page(page);
|
|
/* It's not private so there's nothing to write, right? */
|
|
printk("writepages_callback not private!\n");
|
|
BUG();
|
|
return 0;
|
|
}
|
|
wr = (struct orangefs_write_range *)page_private(page);
|
|
|
|
ret = -1;
|
|
if (ow->npages == 0) {
|
|
ow->off = wr->pos;
|
|
ow->len = wr->len;
|
|
ow->uid = wr->uid;
|
|
ow->gid = wr->gid;
|
|
ow->pages[ow->npages++] = page;
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
|
|
orangefs_writepages_work(ow, wbc);
|
|
ow->npages = 0;
|
|
ret = -1;
|
|
goto done;
|
|
}
|
|
if (ow->off + ow->len == wr->pos) {
|
|
ow->len += wr->len;
|
|
ow->pages[ow->npages++] = page;
|
|
ret = 0;
|
|
goto done;
|
|
}
|
|
done:
|
|
if (ret == -1) {
|
|
if (ow->npages) {
|
|
orangefs_writepages_work(ow, wbc);
|
|
ow->npages = 0;
|
|
}
|
|
ret = orangefs_writepage_locked(page, wbc);
|
|
mapping_set_error(page->mapping, ret);
|
|
unlock_page(page);
|
|
end_page_writeback(page);
|
|
} else {
|
|
if (ow->npages == ow->maxpages) {
|
|
orangefs_writepages_work(ow, wbc);
|
|
ow->npages = 0;
|
|
}
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_writepages(struct address_space *mapping,
|
|
struct writeback_control *wbc)
|
|
{
|
|
struct orangefs_writepages *ow;
|
|
struct blk_plug plug;
|
|
int ret;
|
|
ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
|
|
if (!ow)
|
|
return -ENOMEM;
|
|
ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
|
|
ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
|
|
if (!ow->pages) {
|
|
kfree(ow);
|
|
return -ENOMEM;
|
|
}
|
|
ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
|
|
if (!ow->bv) {
|
|
kfree(ow->pages);
|
|
kfree(ow);
|
|
return -ENOMEM;
|
|
}
|
|
blk_start_plug(&plug);
|
|
ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
|
|
if (ow->npages)
|
|
ret = orangefs_writepages_work(ow, wbc);
|
|
blk_finish_plug(&plug);
|
|
kfree(ow->pages);
|
|
kfree(ow->bv);
|
|
kfree(ow);
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_launder_page(struct page *);
|
|
|
|
static int orangefs_readpage(struct file *file, struct page *page)
|
|
{
|
|
struct inode *inode = page->mapping->host;
|
|
struct iov_iter iter;
|
|
struct bio_vec bv;
|
|
ssize_t ret;
|
|
loff_t off; /* offset into this page */
|
|
pgoff_t index; /* which page */
|
|
struct page *next_page;
|
|
char *kaddr;
|
|
loff_t read_size;
|
|
int buffer_index = -1; /* orangefs shared memory slot */
|
|
int slot_index; /* index into slot */
|
|
int remaining;
|
|
|
|
/*
|
|
* Get up to this many bytes from Orangefs at a time and try
|
|
* to fill them into the page cache at once. Tests with dd made
|
|
* this seem like a reasonable static number, if there was
|
|
* interest perhaps this number could be made setable through
|
|
* sysfs...
|
|
*/
|
|
read_size = 524288;
|
|
|
|
if (PageDirty(page))
|
|
orangefs_launder_page(page);
|
|
|
|
off = page_offset(page);
|
|
index = off >> PAGE_SHIFT;
|
|
bv.bv_page = page;
|
|
bv.bv_len = PAGE_SIZE;
|
|
bv.bv_offset = 0;
|
|
iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);
|
|
|
|
ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
|
|
read_size, inode->i_size, NULL, &buffer_index, file);
|
|
remaining = ret;
|
|
/* this will only zero remaining unread portions of the page data */
|
|
iov_iter_zero(~0U, &iter);
|
|
/* takes care of potential aliasing */
|
|
flush_dcache_page(page);
|
|
if (ret < 0) {
|
|
SetPageError(page);
|
|
unlock_page(page);
|
|
goto out;
|
|
} else {
|
|
SetPageUptodate(page);
|
|
if (PageError(page))
|
|
ClearPageError(page);
|
|
ret = 0;
|
|
}
|
|
/* unlock the page after the ->readpage() routine completes */
|
|
unlock_page(page);
|
|
|
|
if (remaining > PAGE_SIZE) {
|
|
slot_index = 0;
|
|
while ((remaining - PAGE_SIZE) >= PAGE_SIZE) {
|
|
remaining -= PAGE_SIZE;
|
|
/*
|
|
* It is an optimization to try and fill more than one
|
|
* page... by now we've already gotten the single
|
|
* page we were after, if stuff doesn't seem to
|
|
* be going our way at this point just return
|
|
* and hope for the best.
|
|
*
|
|
* If we look for pages and they're already there is
|
|
* one reason to give up, and if they're not there
|
|
* and we can't create them is another reason.
|
|
*/
|
|
|
|
index++;
|
|
slot_index++;
|
|
next_page = find_get_page(inode->i_mapping, index);
|
|
if (next_page) {
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s: found next page, quitting\n",
|
|
__func__);
|
|
put_page(next_page);
|
|
goto out;
|
|
}
|
|
next_page = find_or_create_page(inode->i_mapping,
|
|
index,
|
|
GFP_KERNEL);
|
|
/*
|
|
* I've never hit this, leave it as a printk for
|
|
* now so it will be obvious.
|
|
*/
|
|
if (!next_page) {
|
|
printk("%s: can't create next page, quitting\n",
|
|
__func__);
|
|
goto out;
|
|
}
|
|
kaddr = kmap_atomic(next_page);
|
|
orangefs_bufmap_page_fill(kaddr,
|
|
buffer_index,
|
|
slot_index);
|
|
kunmap_atomic(kaddr);
|
|
SetPageUptodate(next_page);
|
|
unlock_page(next_page);
|
|
put_page(next_page);
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (buffer_index != -1)
|
|
orangefs_bufmap_put(buffer_index);
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_write_begin(struct file *file,
|
|
struct address_space *mapping,
|
|
loff_t pos, unsigned len, unsigned flags, struct page **pagep,
|
|
void **fsdata)
|
|
{
|
|
struct orangefs_write_range *wr;
|
|
struct page *page;
|
|
pgoff_t index;
|
|
int ret;
|
|
|
|
index = pos >> PAGE_SHIFT;
|
|
|
|
page = grab_cache_page_write_begin(mapping, index, flags);
|
|
if (!page)
|
|
return -ENOMEM;
|
|
|
|
*pagep = page;
|
|
|
|
if (PageDirty(page) && !PagePrivate(page)) {
|
|
/*
|
|
* Should be impossible. If it happens, launder the page
|
|
* since we don't know what's dirty. This will WARN in
|
|
* orangefs_writepage_locked.
|
|
*/
|
|
ret = orangefs_launder_page(page);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
if (PagePrivate(page)) {
|
|
struct orangefs_write_range *wr;
|
|
wr = (struct orangefs_write_range *)page_private(page);
|
|
if (wr->pos + wr->len == pos &&
|
|
uid_eq(wr->uid, current_fsuid()) &&
|
|
gid_eq(wr->gid, current_fsgid())) {
|
|
wr->len += len;
|
|
goto okay;
|
|
} else {
|
|
ret = orangefs_launder_page(page);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
wr = kmalloc(sizeof *wr, GFP_KERNEL);
|
|
if (!wr)
|
|
return -ENOMEM;
|
|
|
|
wr->pos = pos;
|
|
wr->len = len;
|
|
wr->uid = current_fsuid();
|
|
wr->gid = current_fsgid();
|
|
attach_page_private(page, wr);
|
|
okay:
|
|
return 0;
|
|
}
|
|
|
|
static int orangefs_write_end(struct file *file, struct address_space *mapping,
|
|
loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
|
|
{
|
|
struct inode *inode = page->mapping->host;
|
|
loff_t last_pos = pos + copied;
|
|
|
|
/*
|
|
* No need to use i_size_read() here, the i_size
|
|
* cannot change under us because we hold the i_mutex.
|
|
*/
|
|
if (last_pos > inode->i_size)
|
|
i_size_write(inode, last_pos);
|
|
|
|
/* zero the stale part of the page if we did a short copy */
|
|
if (!PageUptodate(page)) {
|
|
unsigned from = pos & (PAGE_SIZE - 1);
|
|
if (copied < len) {
|
|
zero_user(page, from + copied, len - copied);
|
|
}
|
|
/* Set fully written pages uptodate. */
|
|
if (pos == page_offset(page) &&
|
|
(len == PAGE_SIZE || pos + len == inode->i_size)) {
|
|
zero_user_segment(page, from + copied, PAGE_SIZE);
|
|
SetPageUptodate(page);
|
|
}
|
|
}
|
|
|
|
set_page_dirty(page);
|
|
unlock_page(page);
|
|
put_page(page);
|
|
|
|
mark_inode_dirty_sync(file_inode(file));
|
|
return copied;
|
|
}
|
|
|
|
static void orangefs_invalidatepage(struct page *page,
|
|
unsigned int offset,
|
|
unsigned int length)
|
|
{
|
|
struct orangefs_write_range *wr;
|
|
wr = (struct orangefs_write_range *)page_private(page);
|
|
|
|
if (offset == 0 && length == PAGE_SIZE) {
|
|
kfree(detach_page_private(page));
|
|
return;
|
|
/* write range entirely within invalidate range (or equal) */
|
|
} else if (page_offset(page) + offset <= wr->pos &&
|
|
wr->pos + wr->len <= page_offset(page) + offset + length) {
|
|
kfree(detach_page_private(page));
|
|
/* XXX is this right? only caller in fs */
|
|
cancel_dirty_page(page);
|
|
return;
|
|
/* invalidate range chops off end of write range */
|
|
} else if (wr->pos < page_offset(page) + offset &&
|
|
wr->pos + wr->len <= page_offset(page) + offset + length &&
|
|
page_offset(page) + offset < wr->pos + wr->len) {
|
|
size_t x;
|
|
x = wr->pos + wr->len - (page_offset(page) + offset);
|
|
WARN_ON(x > wr->len);
|
|
wr->len -= x;
|
|
wr->uid = current_fsuid();
|
|
wr->gid = current_fsgid();
|
|
/* invalidate range chops off beginning of write range */
|
|
} else if (page_offset(page) + offset <= wr->pos &&
|
|
page_offset(page) + offset + length < wr->pos + wr->len &&
|
|
wr->pos < page_offset(page) + offset + length) {
|
|
size_t x;
|
|
x = page_offset(page) + offset + length - wr->pos;
|
|
WARN_ON(x > wr->len);
|
|
wr->pos += x;
|
|
wr->len -= x;
|
|
wr->uid = current_fsuid();
|
|
wr->gid = current_fsgid();
|
|
/* invalidate range entirely within write range (punch hole) */
|
|
} else if (wr->pos < page_offset(page) + offset &&
|
|
page_offset(page) + offset + length < wr->pos + wr->len) {
|
|
/* XXX what do we do here... should not WARN_ON */
|
|
WARN_ON(1);
|
|
/* punch hole */
|
|
/*
|
|
* should we just ignore this and write it out anyway?
|
|
* it hardly makes sense
|
|
*/
|
|
return;
|
|
/* non-overlapping ranges */
|
|
} else {
|
|
/* WARN if they do overlap */
|
|
if (!((page_offset(page) + offset + length <= wr->pos) ^
|
|
(wr->pos + wr->len <= page_offset(page) + offset))) {
|
|
WARN_ON(1);
|
|
printk("invalidate range offset %llu length %u\n",
|
|
page_offset(page) + offset, length);
|
|
printk("write range offset %llu length %zu\n",
|
|
wr->pos, wr->len);
|
|
}
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Above there are returns where wr is freed or where we WARN.
|
|
* Thus the following runs if wr was modified above.
|
|
*/
|
|
|
|
orangefs_launder_page(page);
|
|
}
|
|
|
|
static int orangefs_releasepage(struct page *page, gfp_t foo)
|
|
{
|
|
return !PagePrivate(page);
|
|
}
|
|
|
|
static void orangefs_freepage(struct page *page)
|
|
{
|
|
kfree(detach_page_private(page));
|
|
}
|
|
|
|
static int orangefs_launder_page(struct page *page)
|
|
{
|
|
int r = 0;
|
|
struct writeback_control wbc = {
|
|
.sync_mode = WB_SYNC_ALL,
|
|
.nr_to_write = 0,
|
|
};
|
|
wait_on_page_writeback(page);
|
|
if (clear_page_dirty_for_io(page)) {
|
|
r = orangefs_writepage_locked(page, &wbc);
|
|
end_page_writeback(page);
|
|
}
|
|
return r;
|
|
}
|
|
|
|
static ssize_t orangefs_direct_IO(struct kiocb *iocb,
|
|
struct iov_iter *iter)
|
|
{
|
|
/*
|
|
* Comment from original do_readv_writev:
|
|
* Common entry point for read/write/readv/writev
|
|
* This function will dispatch it to either the direct I/O
|
|
* or buffered I/O path depending on the mount options and/or
|
|
* augmented/extended metadata attached to the file.
|
|
* Note: File extended attributes override any mount options.
|
|
*/
|
|
struct file *file = iocb->ki_filp;
|
|
loff_t pos = iocb->ki_pos;
|
|
enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
|
|
ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
|
|
loff_t *offset = &pos;
|
|
struct inode *inode = file->f_mapping->host;
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
|
|
size_t count = iov_iter_count(iter);
|
|
ssize_t total_count = 0;
|
|
ssize_t ret = -EINVAL;
|
|
int i = 0;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
|
|
__func__,
|
|
handle,
|
|
(int)count);
|
|
|
|
if (type == ORANGEFS_IO_WRITE) {
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): proceeding with offset : %llu, "
|
|
"size %d\n",
|
|
__func__,
|
|
handle,
|
|
llu(*offset),
|
|
(int)count);
|
|
}
|
|
|
|
if (count == 0) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
while (iov_iter_count(iter)) {
|
|
size_t each_count = iov_iter_count(iter);
|
|
size_t amt_complete;
|
|
i++;
|
|
|
|
/* how much to transfer in this loop iteration */
|
|
if (each_count > orangefs_bufmap_size_query())
|
|
each_count = orangefs_bufmap_size_query();
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): size of each_count(%d)\n",
|
|
__func__,
|
|
handle,
|
|
(int)each_count);
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): BEFORE wait_for_io: offset is %d\n",
|
|
__func__,
|
|
handle,
|
|
(int)*offset);
|
|
|
|
ret = wait_for_direct_io(type, inode, offset, iter,
|
|
each_count, 0, NULL, NULL, file);
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): return from wait_for_io:%d\n",
|
|
__func__,
|
|
handle,
|
|
(int)ret);
|
|
|
|
if (ret < 0)
|
|
goto out;
|
|
|
|
*offset += ret;
|
|
total_count += ret;
|
|
amt_complete = ret;
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): AFTER wait_for_io: offset is %d\n",
|
|
__func__,
|
|
handle,
|
|
(int)*offset);
|
|
|
|
/*
|
|
* if we got a short I/O operations,
|
|
* fall out and return what we got so far
|
|
*/
|
|
if (amt_complete < each_count)
|
|
break;
|
|
} /*end while */
|
|
|
|
out:
|
|
if (total_count > 0)
|
|
ret = total_count;
|
|
if (ret > 0) {
|
|
if (type == ORANGEFS_IO_READ) {
|
|
file_accessed(file);
|
|
} else {
|
|
file_update_time(file);
|
|
if (*offset > i_size_read(inode))
|
|
i_size_write(inode, *offset);
|
|
}
|
|
}
|
|
|
|
gossip_debug(GOSSIP_FILE_DEBUG,
|
|
"%s(%pU): Value(%d) returned.\n",
|
|
__func__,
|
|
handle,
|
|
(int)ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/** ORANGEFS2 implementation of address space operations */
|
|
static const struct address_space_operations orangefs_address_operations = {
|
|
.writepage = orangefs_writepage,
|
|
.readpage = orangefs_readpage,
|
|
.writepages = orangefs_writepages,
|
|
.set_page_dirty = __set_page_dirty_nobuffers,
|
|
.write_begin = orangefs_write_begin,
|
|
.write_end = orangefs_write_end,
|
|
.invalidatepage = orangefs_invalidatepage,
|
|
.releasepage = orangefs_releasepage,
|
|
.freepage = orangefs_freepage,
|
|
.launder_page = orangefs_launder_page,
|
|
.direct_IO = orangefs_direct_IO,
|
|
};
|
|
|
|
vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
|
|
{
|
|
struct page *page = vmf->page;
|
|
struct inode *inode = file_inode(vmf->vma->vm_file);
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
unsigned long *bitlock = &orangefs_inode->bitlock;
|
|
vm_fault_t ret;
|
|
struct orangefs_write_range *wr;
|
|
|
|
sb_start_pagefault(inode->i_sb);
|
|
|
|
if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
|
|
ret = VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
|
|
lock_page(page);
|
|
if (PageDirty(page) && !PagePrivate(page)) {
|
|
/*
|
|
* Should be impossible. If it happens, launder the page
|
|
* since we don't know what's dirty. This will WARN in
|
|
* orangefs_writepage_locked.
|
|
*/
|
|
if (orangefs_launder_page(page)) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
}
|
|
if (PagePrivate(page)) {
|
|
wr = (struct orangefs_write_range *)page_private(page);
|
|
if (uid_eq(wr->uid, current_fsuid()) &&
|
|
gid_eq(wr->gid, current_fsgid())) {
|
|
wr->pos = page_offset(page);
|
|
wr->len = PAGE_SIZE;
|
|
goto okay;
|
|
} else {
|
|
if (orangefs_launder_page(page)) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
}
|
|
}
|
|
wr = kmalloc(sizeof *wr, GFP_KERNEL);
|
|
if (!wr) {
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
|
|
goto out;
|
|
}
|
|
wr->pos = page_offset(page);
|
|
wr->len = PAGE_SIZE;
|
|
wr->uid = current_fsuid();
|
|
wr->gid = current_fsgid();
|
|
attach_page_private(page, wr);
|
|
okay:
|
|
|
|
file_update_time(vmf->vma->vm_file);
|
|
if (page->mapping != inode->i_mapping) {
|
|
unlock_page(page);
|
|
ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* We mark the page dirty already here so that when freeze is in
|
|
* progress, we are guaranteed that writeback during freezing will
|
|
* see the dirty page and writeprotect it again.
|
|
*/
|
|
set_page_dirty(page);
|
|
wait_for_stable_page(page);
|
|
ret = VM_FAULT_LOCKED;
|
|
out:
|
|
sb_end_pagefault(inode->i_sb);
|
|
return ret;
|
|
}
|
|
|
|
static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
|
|
{
|
|
struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
|
|
struct orangefs_kernel_op_s *new_op;
|
|
loff_t orig_size;
|
|
int ret = -EINVAL;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s: %pU: Handle is %pU | fs_id %d | size is %llu\n",
|
|
__func__,
|
|
get_khandle_from_ino(inode),
|
|
&orangefs_inode->refn.khandle,
|
|
orangefs_inode->refn.fs_id,
|
|
iattr->ia_size);
|
|
|
|
/* Ensure that we have a up to date size, so we know if it changed. */
|
|
ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
|
|
if (ret == -ESTALE)
|
|
ret = -EIO;
|
|
if (ret) {
|
|
gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
|
|
__func__, ret);
|
|
return ret;
|
|
}
|
|
orig_size = i_size_read(inode);
|
|
|
|
/* This is truncate_setsize in a different order. */
|
|
truncate_pagecache(inode, iattr->ia_size);
|
|
i_size_write(inode, iattr->ia_size);
|
|
if (iattr->ia_size > orig_size)
|
|
pagecache_isize_extended(inode, orig_size, iattr->ia_size);
|
|
|
|
new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
|
|
if (!new_op)
|
|
return -ENOMEM;
|
|
|
|
new_op->upcall.req.truncate.refn = orangefs_inode->refn;
|
|
new_op->upcall.req.truncate.size = (__s64) iattr->ia_size;
|
|
|
|
ret = service_operation(new_op,
|
|
__func__,
|
|
get_interruptible_flag(inode));
|
|
|
|
/*
|
|
* the truncate has no downcall members to retrieve, but
|
|
* the status value tells us if it went through ok or not
|
|
*/
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
|
|
|
|
op_release(new_op);
|
|
|
|
if (ret != 0)
|
|
return ret;
|
|
|
|
if (orig_size != i_size_read(inode))
|
|
iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
|
|
|
|
return ret;
|
|
}
|
|
|
|
int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
|
|
{
|
|
int ret;
|
|
|
|
if (iattr->ia_valid & ATTR_MODE) {
|
|
if (iattr->ia_mode & (S_ISVTX)) {
|
|
if (is_root_handle(inode)) {
|
|
/*
|
|
* allow sticky bit to be set on root (since
|
|
* it shows up that way by default anyhow),
|
|
* but don't show it to the server
|
|
*/
|
|
iattr->ia_mode -= S_ISVTX;
|
|
} else {
|
|
gossip_debug(GOSSIP_UTILS_DEBUG,
|
|
"User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
if (iattr->ia_mode & (S_ISUID)) {
|
|
gossip_debug(GOSSIP_UTILS_DEBUG,
|
|
"Attempting to set setuid bit (not supported); returning EINVAL.\n");
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (iattr->ia_valid & ATTR_SIZE) {
|
|
ret = orangefs_setattr_size(inode, iattr);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
again:
|
|
spin_lock(&inode->i_lock);
|
|
if (ORANGEFS_I(inode)->attr_valid) {
|
|
if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
|
|
gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
|
|
ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
|
|
} else {
|
|
spin_unlock(&inode->i_lock);
|
|
write_inode_now(inode, 1);
|
|
goto again;
|
|
}
|
|
} else {
|
|
ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
|
|
ORANGEFS_I(inode)->attr_uid = current_fsuid();
|
|
ORANGEFS_I(inode)->attr_gid = current_fsgid();
|
|
}
|
|
setattr_copy(inode, iattr);
|
|
spin_unlock(&inode->i_lock);
|
|
mark_inode_dirty(inode);
|
|
|
|
if (iattr->ia_valid & ATTR_MODE)
|
|
/* change mod on a file that has ACLs */
|
|
ret = posix_acl_chmod(inode, inode->i_mode);
|
|
|
|
ret = 0;
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Change attributes of an object referenced by dentry.
|
|
*/
|
|
int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
|
|
{
|
|
int ret;
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
|
|
dentry);
|
|
ret = setattr_prepare(dentry, iattr);
|
|
if (ret)
|
|
goto out;
|
|
ret = __orangefs_setattr(d_inode(dentry), iattr);
|
|
sync_inode_metadata(d_inode(dentry), 1);
|
|
out:
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
|
|
ret);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* Obtain attributes of an object given a dentry
|
|
*/
|
|
int orangefs_getattr(const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags)
|
|
{
|
|
int ret;
|
|
struct inode *inode = path->dentry->d_inode;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"orangefs_getattr: called on %pd mask %u\n",
|
|
path->dentry, request_mask);
|
|
|
|
ret = orangefs_inode_getattr(inode,
|
|
request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
|
|
if (ret == 0) {
|
|
generic_fillattr(inode, stat);
|
|
|
|
/* override block size reported to stat */
|
|
if (!(request_mask & STATX_SIZE))
|
|
stat->result_mask &= ~STATX_SIZE;
|
|
|
|
stat->attributes_mask = STATX_ATTR_IMMUTABLE |
|
|
STATX_ATTR_APPEND;
|
|
if (inode->i_flags & S_IMMUTABLE)
|
|
stat->attributes |= STATX_ATTR_IMMUTABLE;
|
|
if (inode->i_flags & S_APPEND)
|
|
stat->attributes |= STATX_ATTR_APPEND;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int orangefs_permission(struct inode *inode, int mask)
|
|
{
|
|
int ret;
|
|
|
|
if (mask & MAY_NOT_BLOCK)
|
|
return -ECHILD;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
|
|
|
|
/* Make sure the permission (and other common attrs) are up to date. */
|
|
ret = orangefs_inode_getattr(inode, 0);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
return generic_permission(inode, mask);
|
|
}
|
|
|
|
int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags)
|
|
{
|
|
struct iattr iattr;
|
|
gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_update_time: %pU\n",
|
|
get_khandle_from_ino(inode));
|
|
generic_update_time(inode, time, flags);
|
|
memset(&iattr, 0, sizeof iattr);
|
|
if (flags & S_ATIME)
|
|
iattr.ia_valid |= ATTR_ATIME;
|
|
if (flags & S_CTIME)
|
|
iattr.ia_valid |= ATTR_CTIME;
|
|
if (flags & S_MTIME)
|
|
iattr.ia_valid |= ATTR_MTIME;
|
|
return __orangefs_setattr(inode, &iattr);
|
|
}
|
|
|
|
/* ORANGEFS2 implementation of VFS inode operations for files */
|
|
static const struct inode_operations orangefs_file_inode_operations = {
|
|
.get_acl = orangefs_get_acl,
|
|
.set_acl = orangefs_set_acl,
|
|
.setattr = orangefs_setattr,
|
|
.getattr = orangefs_getattr,
|
|
.listxattr = orangefs_listxattr,
|
|
.permission = orangefs_permission,
|
|
.update_time = orangefs_update_time,
|
|
};
|
|
|
|
static int orangefs_init_iops(struct inode *inode)
|
|
{
|
|
inode->i_mapping->a_ops = &orangefs_address_operations;
|
|
|
|
switch (inode->i_mode & S_IFMT) {
|
|
case S_IFREG:
|
|
inode->i_op = &orangefs_file_inode_operations;
|
|
inode->i_fop = &orangefs_file_operations;
|
|
break;
|
|
case S_IFLNK:
|
|
inode->i_op = &orangefs_symlink_inode_operations;
|
|
break;
|
|
case S_IFDIR:
|
|
inode->i_op = &orangefs_dir_inode_operations;
|
|
inode->i_fop = &orangefs_dir_operations;
|
|
break;
|
|
default:
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s: unsupported mode\n",
|
|
__func__);
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Given an ORANGEFS object identifier (fsid, handle), convert it into
|
|
* a ino_t type that will be used as a hash-index from where the handle will
|
|
* be searched for in the VFS hash table of inodes.
|
|
*/
|
|
static inline ino_t orangefs_handle_hash(struct orangefs_object_kref *ref)
|
|
{
|
|
if (!ref)
|
|
return 0;
|
|
return orangefs_khandle_to_ino(&(ref->khandle));
|
|
}
|
|
|
|
/*
|
|
* Called to set up an inode from iget5_locked.
|
|
*/
|
|
static int orangefs_set_inode(struct inode *inode, void *data)
|
|
{
|
|
struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
|
|
ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
|
|
ORANGEFS_I(inode)->refn.khandle = ref->khandle;
|
|
ORANGEFS_I(inode)->attr_valid = 0;
|
|
hash_init(ORANGEFS_I(inode)->xattr_cache);
|
|
ORANGEFS_I(inode)->mapping_time = jiffies - 1;
|
|
ORANGEFS_I(inode)->bitlock = 0;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called to determine if handles match.
|
|
*/
|
|
static int orangefs_test_inode(struct inode *inode, void *data)
|
|
{
|
|
struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
|
|
struct orangefs_inode_s *orangefs_inode = NULL;
|
|
|
|
orangefs_inode = ORANGEFS_I(inode);
|
|
/* test handles and fs_ids... */
|
|
return (!ORANGEFS_khandle_cmp(&(orangefs_inode->refn.khandle),
|
|
&(ref->khandle)) &&
|
|
orangefs_inode->refn.fs_id == ref->fs_id);
|
|
}
|
|
|
|
/*
|
|
* Front-end to lookup the inode-cache maintained by the VFS using the ORANGEFS
|
|
* file handle.
|
|
*
|
|
* @sb: the file system super block instance.
|
|
* @ref: The ORANGEFS object for which we are trying to locate an inode.
|
|
*/
|
|
struct inode *orangefs_iget(struct super_block *sb,
|
|
struct orangefs_object_kref *ref)
|
|
{
|
|
struct inode *inode = NULL;
|
|
unsigned long hash;
|
|
int error;
|
|
|
|
hash = orangefs_handle_hash(ref);
|
|
inode = iget5_locked(sb,
|
|
hash,
|
|
orangefs_test_inode,
|
|
orangefs_set_inode,
|
|
ref);
|
|
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
if (!(inode->i_state & I_NEW))
|
|
return inode;
|
|
|
|
error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
|
|
if (error) {
|
|
iget_failed(inode);
|
|
return ERR_PTR(error);
|
|
}
|
|
|
|
inode->i_ino = hash; /* needed for stat etc */
|
|
orangefs_init_iops(inode);
|
|
unlock_new_inode(inode);
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"iget handle %pU, fsid %d hash %ld i_ino %lu\n",
|
|
&ref->khandle,
|
|
ref->fs_id,
|
|
hash,
|
|
inode->i_ino);
|
|
|
|
return inode;
|
|
}
|
|
|
|
/*
|
|
* Allocate an inode for a newly created file and insert it into the inode hash.
|
|
*/
|
|
struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
|
|
int mode, dev_t dev, struct orangefs_object_kref *ref)
|
|
{
|
|
unsigned long hash = orangefs_handle_hash(ref);
|
|
struct inode *inode;
|
|
int error;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"%s:(sb is %p | MAJOR(dev)=%u | MINOR(dev)=%u mode=%o)\n",
|
|
__func__,
|
|
sb,
|
|
MAJOR(dev),
|
|
MINOR(dev),
|
|
mode);
|
|
|
|
inode = new_inode(sb);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
orangefs_set_inode(inode, ref);
|
|
inode->i_ino = hash; /* needed for stat etc */
|
|
|
|
error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
|
|
if (error)
|
|
goto out_iput;
|
|
|
|
orangefs_init_iops(inode);
|
|
inode->i_rdev = dev;
|
|
|
|
error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
|
|
if (error < 0)
|
|
goto out_iput;
|
|
|
|
gossip_debug(GOSSIP_INODE_DEBUG,
|
|
"Initializing ACL's for inode %pU\n",
|
|
get_khandle_from_ino(inode));
|
|
orangefs_init_acl(inode, dir);
|
|
return inode;
|
|
|
|
out_iput:
|
|
iput(inode);
|
|
return ERR_PTR(error);
|
|
}
|