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inode.c
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inode.c
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// 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);
if (ret < 0) {
SetPageError(page);
mapping_set_error(page->mapping, ret);
} else {
ret = 0;
}
if (wr) {
kfree(wr);
set_page_private(page, 0);
ClearPagePrivate(page);
put_page(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);
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;
struct orangefs_read_options *ro = file->private_data;
loff_t read_size;
loff_t roundedup;
int buffer_index = -1; /* orangefs shared memory slot */
int slot_index; /* index into slot */
int remaining;
/*
* If they set some miniscule size for "count" in read(2)
* (for example) then let's try to read a page, or the whole file
* if it is smaller than a page. Once "count" goes over a page
* then lets round up to the highest page size multiple that is
* less than or equal to "count" and do that much orangefs IO and
* try to fill as many pages as we can from it.
*
* "count" should be represented in ro->blksiz.
*
* inode->i_size = file size.
*/
if (ro) {
if (ro->blksiz < PAGE_SIZE) {
if (inode->i_size < PAGE_SIZE)
read_size = inode->i_size;
else
read_size = PAGE_SIZE;
} else {
roundedup = ((PAGE_SIZE - 1) & ro->blksiz) ?
((ro->blksiz + PAGE_SIZE) & ~(PAGE_SIZE -1)) :
ro->blksiz;
if (roundedup > inode->i_size)
read_size = inode->i_size;
else
read_size = roundedup;
}
} else {
read_size = PAGE_SIZE;
}
if (!read_size)
read_size = PAGE_SIZE;
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);
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();
SetPagePrivate(page);
set_page_private(page, (unsigned long)wr);
get_page(page);
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((struct orangefs_write_range *)page_private(page));
set_page_private(page, 0);
ClearPagePrivate(page);
put_page(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((struct orangefs_write_range *)page_private(page));
set_page_private(page, 0);
ClearPagePrivate(page);
put_page(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)
{
if (PagePrivate(page)) {
kfree((struct orangefs_write_range *)page_private(page));
set_page_private(page, 0);
ClearPagePrivate(page);
put_page(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);
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();
SetPagePrivate(page);
set_page_private(page, (unsigned long)wr);
get_page(page);
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 = -ENOENT;
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);
}