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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/blkdev.h>
#include <linux/fileattr.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_invalidate_folio. */
WARN_ON(off == len || off + wlen > len);
WARN_ON(wlen == 0);
bvec_set_page(&bv, page, wlen, off % PAGE_SIZE);
iov_iter_bvec(&iter, ITER_SOURCE, &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]);
bvec_set_page(&ow->bv[i], ow->pages[i],
min(page_offset(ow->pages[i]) + PAGE_SIZE,
ow->off + ow->len) -
max(ow->off, page_offset(ow->pages[i])),
i == 0 ? ow->off - page_offset(ow->pages[i]) : 0);
}
iov_iter_bvec(&iter, ITER_SOURCE, 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 folio *folio,
struct writeback_control *wbc, void *data)
{
struct orangefs_writepages *ow = data;
struct orangefs_write_range *wr = folio->private;
int ret;
if (!wr) {
folio_unlock(folio);
/* It's not private so there's nothing to write, right? */
printk("writepages_callback not private!\n");
BUG();
return 0;
}
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++] = &folio->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++] = &folio->page;
ret = 0;
goto done;
}
done:
if (ret == -1) {
if (ow->npages) {
orangefs_writepages_work(ow, wbc);
ow->npages = 0;
}
ret = orangefs_writepage_locked(&folio->page, wbc);
mapping_set_error(folio->mapping, ret);
folio_unlock(folio);
folio_end_writeback(folio);
} 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_folio(struct folio *);
static void orangefs_readahead(struct readahead_control *rac)
{
loff_t offset;
struct iov_iter iter;
struct inode *inode = rac->mapping->host;
struct xarray *i_pages;
struct folio *folio;
loff_t new_start = readahead_pos(rac);
int ret;
size_t new_len = 0;
loff_t bytes_remaining = inode->i_size - readahead_pos(rac);
loff_t pages_remaining = bytes_remaining / PAGE_SIZE;
if (pages_remaining >= 1024)
new_len = 4194304;
else if (pages_remaining > readahead_count(rac))
new_len = bytes_remaining;
if (new_len)
readahead_expand(rac, new_start, new_len);
offset = readahead_pos(rac);
i_pages = &rac->mapping->i_pages;
iov_iter_xarray(&iter, ITER_DEST, i_pages, offset, readahead_length(rac));
/* read in the pages. */
if ((ret = wait_for_direct_io(ORANGEFS_IO_READ, inode,
&offset, &iter, readahead_length(rac),
inode->i_size, NULL, NULL, rac->file)) < 0)
gossip_debug(GOSSIP_FILE_DEBUG,
"%s: wait_for_direct_io failed. \n", __func__);
else
ret = 0;
/* clean up. */
while ((folio = readahead_folio(rac))) {
if (!ret)
folio_mark_uptodate(folio);
folio_unlock(folio);
}
}
static int orangefs_read_folio(struct file *file, struct folio *folio)
{
struct inode *inode = folio->mapping->host;
struct iov_iter iter;
struct bio_vec bv;
ssize_t ret;
loff_t off; /* offset of this folio in the file */
if (folio_test_dirty(folio))
orangefs_launder_folio(folio);
off = folio_pos(folio);
bvec_set_folio(&bv, folio, folio_size(folio), 0);
iov_iter_bvec(&iter, ITER_DEST, &bv, 1, folio_size(folio));
ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
folio_size(folio), inode->i_size, NULL, NULL, file);
/* this will only zero remaining unread portions of the folio data */
iov_iter_zero(~0U, &iter);
/* takes care of potential aliasing */
flush_dcache_folio(folio);
if (ret < 0) {
folio_set_error(folio);
} else {
folio_mark_uptodate(folio);
ret = 0;
}
/* unlock the folio after the ->read_folio() routine completes */
folio_unlock(folio);
return ret;
}
static int orangefs_write_begin(struct file *file,
struct address_space *mapping, loff_t pos, unsigned len,
struct page **pagep, void **fsdata)
{
struct orangefs_write_range *wr;
struct folio *folio;
struct page *page;
pgoff_t index;
int ret;
index = pos >> PAGE_SHIFT;
page = grab_cache_page_write_begin(mapping, index);
if (!page)
return -ENOMEM;
*pagep = page;
folio = page_folio(page);
if (folio_test_dirty(folio) && !folio_test_private(folio)) {
/*
* 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_folio(folio);
if (ret)
return ret;
}
if (folio_test_private(folio)) {
struct orangefs_write_range *wr;
wr = folio_get_private(folio);
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_folio(folio);
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();
folio_attach_private(folio, 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_invalidate_folio(struct folio *folio,
size_t offset, size_t length)
{
struct orangefs_write_range *wr = folio_get_private(folio);
if (offset == 0 && length == PAGE_SIZE) {
kfree(folio_detach_private(folio));
return;
/* write range entirely within invalidate range (or equal) */
} else if (folio_pos(folio) + offset <= wr->pos &&
wr->pos + wr->len <= folio_pos(folio) + offset + length) {
kfree(folio_detach_private(folio));
/* XXX is this right? only caller in fs */
folio_cancel_dirty(folio);
return;
/* invalidate range chops off end of write range */
} else if (wr->pos < folio_pos(folio) + offset &&
wr->pos + wr->len <= folio_pos(folio) + offset + length &&
folio_pos(folio) + offset < wr->pos + wr->len) {
size_t x;
x = wr->pos + wr->len - (folio_pos(folio) + 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 (folio_pos(folio) + offset <= wr->pos &&
folio_pos(folio) + offset + length < wr->pos + wr->len &&
wr->pos < folio_pos(folio) + offset + length) {
size_t x;
x = folio_pos(folio) + 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 < folio_pos(folio) + offset &&
folio_pos(folio) + 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 (!((folio_pos(folio) + offset + length <= wr->pos) ^
(wr->pos + wr->len <= folio_pos(folio) + offset))) {
WARN_ON(1);
printk("invalidate range offset %llu length %zu\n",
folio_pos(folio) + 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_folio(folio);
}
static bool orangefs_release_folio(struct folio *folio, gfp_t foo)
{
return !folio_test_private(folio);
}
static void orangefs_free_folio(struct folio *folio)
{
kfree(folio_detach_private(folio));
}
static int orangefs_launder_folio(struct folio *folio)
{
int r = 0;
struct writeback_control wbc = {
.sync_mode = WB_SYNC_ALL,
.nr_to_write = 0,
};
folio_wait_writeback(folio);
if (folio_clear_dirty_for_io(folio)) {
r = orangefs_writepage_locked(&folio->page, &wbc);
folio_end_writeback(folio);
}
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;
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;
/* 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,
.readahead = orangefs_readahead,
.read_folio = orangefs_read_folio,
.writepages = orangefs_writepages,
.dirty_folio = filemap_dirty_folio,
.write_begin = orangefs_write_begin,
.write_end = orangefs_write_end,
.invalidate_folio = orangefs_invalidate_folio,
.release_folio = orangefs_release_folio,
.free_folio = orangefs_free_folio,
.launder_folio = orangefs_launder_folio,
.direct_IO = orangefs_direct_IO,
};
vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
{
struct folio *folio = page_folio(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;
}
folio_lock(folio);
if (folio_test_dirty(folio) && !folio_test_private(folio)) {
/*
* Should be impossible. If it happens, launder the folio
* since we don't know what's dirty. This will WARN in
* orangefs_writepage_locked.
*/
if (orangefs_launder_folio(folio)) {
ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
goto out;
}
}
if (folio_test_private(folio)) {
wr = folio_get_private(folio);
if (uid_eq(wr->uid, current_fsuid()) &&
gid_eq(wr->gid, current_fsgid())) {
wr->pos = page_offset(vmf->page);
wr->len = PAGE_SIZE;
goto okay;
} else {
if (orangefs_launder_folio(folio)) {
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(vmf->page);
wr->len = PAGE_SIZE;
wr->uid = current_fsuid();
wr->gid = current_fsgid();
folio_attach_private(folio, wr);
okay:
file_update_time(vmf->vma->vm_file);
if (folio->mapping != inode->i_mapping) {
folio_unlock(folio);
ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
goto out;
}
/*
* We mark the folio dirty already here so that when freeze is in
* progress, we are guaranteed that writeback during freezing will
* see the dirty folio and writeprotect it again.
*/
folio_mark_dirty(folio);
folio_wait_stable(folio);
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(&nop_mnt_idmap, inode, iattr);
spin_unlock(&inode->i_lock);
mark_inode_dirty(inode);
ret = 0;
out:
return ret;
}
int __orangefs_setattr_mode(struct dentry *dentry, struct iattr *iattr)
{
int ret;
struct inode *inode = d_inode(dentry);
ret = __orangefs_setattr(inode, iattr);
/* change mode on a file that has ACLs */
if (!ret && (iattr->ia_valid & ATTR_MODE))
ret = posix_acl_chmod(&nop_mnt_idmap, dentry, inode->i_mode);
return ret;
}
/*
* Change attributes of an object referenced by dentry.
*/
int orangefs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
struct iattr *iattr)
{
int ret;
gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
dentry);
ret = setattr_prepare(&nop_mnt_idmap, dentry, iattr);
if (ret)
goto out;
ret = __orangefs_setattr_mode(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(struct mnt_idmap *idmap, 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(&nop_mnt_idmap, inode, stat);
/* override block size reported to stat */
if (!(request_mask & STATX_SIZE))
stat->result_mask &= ~STATX_SIZE;
generic_fill_statx_attr(inode, stat);
}
return ret;
}
int orangefs_permission(struct mnt_idmap *idmap,
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(&nop_mnt_idmap, 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);
}
static int orangefs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
{
u64 val = 0;
int ret;
gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
dentry);
ret = orangefs_inode_getxattr(d_inode(dentry),
"user.pvfs2.meta_hint",
&val, sizeof(val));
if (ret < 0 && ret != -ENODATA)
return ret;
gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
fileattr_fill_flags(fa, val);
return 0;
}
static int orangefs_fileattr_set(struct mnt_idmap *idmap,
struct dentry *dentry, struct fileattr *fa)
{
u64 val = 0;
gossip_debug(GOSSIP_FILE_DEBUG, "%s: called on %pd\n", __func__,
dentry);
/*
* ORANGEFS_MIRROR_FL is set internally when the mirroring mode is
* turned on for a file. The user is not allowed to turn on this bit,
* but the bit is present if the user first gets the flags and then
* updates the flags with some new settings. So, we ignore it in the
* following edit. bligon.
*/
if (fileattr_has_fsx(fa) ||
(fa->flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | FS_NOATIME_FL | ORANGEFS_MIRROR_FL))) {
gossip_err("%s: only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n",
__func__);
return -EOPNOTSUPP;
}
val = fa->flags;
gossip_debug(GOSSIP_FILE_DEBUG, "%s: flags=%u\n", __func__, (u32) val);
return orangefs_inode_setxattr(d_inode(dentry),
"user.pvfs2.meta_hint",
&val, sizeof(val), 0);
}
/* ORANGEFS2 implementation of VFS inode operations for files */
static const struct inode_operations orangefs_file_inode_operations = {
.get_inode_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,
.fileattr_get = orangefs_fileattr_get,
.fileattr_set = orangefs_fileattr_set,
};
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;
}