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Diffstat (limited to 'fs/afs/write.c')
-rw-r--r--fs/afs/write.c101
1 files changed, 35 insertions, 66 deletions
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 5e15a21dbf9..ab6adfd5251 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -14,6 +14,7 @@
#include <linux/pagemap.h>
#include <linux/writeback.h>
#include <linux/pagevec.h>
+#include <linux/aio.h>
#include "internal.h"
static int afs_write_back_from_locked_page(struct afs_writeback *wb,
@@ -84,23 +85,21 @@ void afs_put_writeback(struct afs_writeback *wb)
* partly or wholly fill a page that's under preparation for writing
*/
static int afs_fill_page(struct afs_vnode *vnode, struct key *key,
- loff_t pos, unsigned len, struct page *page)
+ loff_t pos, struct page *page)
{
loff_t i_size;
- unsigned eof;
int ret;
+ int len;
- _enter(",,%llu,%u", (unsigned long long)pos, len);
-
- ASSERTCMP(len, <=, PAGE_CACHE_SIZE);
+ _enter(",,%llu", (unsigned long long)pos);
i_size = i_size_read(&vnode->vfs_inode);
- if (pos + len > i_size)
- eof = i_size;
+ if (pos + PAGE_CACHE_SIZE > i_size)
+ len = i_size - pos;
else
- eof = PAGE_CACHE_SIZE;
+ len = PAGE_CACHE_SIZE;
- ret = afs_vnode_fetch_data(vnode, key, 0, eof, page);
+ ret = afs_vnode_fetch_data(vnode, key, pos, len, page);
if (ret < 0) {
if (ret == -ENOENT) {
_debug("got NOENT from server"
@@ -122,7 +121,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
struct page **pagep, void **fsdata)
{
struct afs_writeback *candidate, *wb;
- struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+ struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
struct page *page;
struct key *key = file->private_data;
unsigned from = pos & (PAGE_CACHE_SIZE - 1);
@@ -140,6 +139,7 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
candidate->first = candidate->last = index;
candidate->offset_first = from;
candidate->to_last = to;
+ INIT_LIST_HEAD(&candidate->link);
candidate->usage = 1;
candidate->state = AFS_WBACK_PENDING;
init_waitqueue_head(&candidate->waitq);
@@ -152,9 +152,8 @@ int afs_write_begin(struct file *file, struct address_space *mapping,
*pagep = page;
/* page won't leak in error case: it eventually gets cleaned off LRU */
- if (!PageUptodate(page)) {
- _debug("not up to date");
- ret = afs_fill_page(vnode, key, pos, len, page);
+ if (!PageUptodate(page) && len != PAGE_CACHE_SIZE) {
+ ret = afs_fill_page(vnode, key, index << PAGE_CACHE_SHIFT, page);
if (ret < 0) {
kfree(candidate);
_leave(" = %d [prep]", ret);
@@ -247,7 +246,7 @@ int afs_write_end(struct file *file, struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
struct page *page, void *fsdata)
{
- struct afs_vnode *vnode = AFS_FS_I(file->f_dentry->d_inode);
+ struct afs_vnode *vnode = AFS_FS_I(file_inode(file));
loff_t i_size, maybe_i_size;
_enter("{%x:%u},{%lx}",
@@ -438,7 +437,6 @@ no_more:
*/
int afs_writepage(struct page *page, struct writeback_control *wbc)
{
- struct backing_dev_info *bdi = page->mapping->backing_dev_info;
struct afs_writeback *wb;
int ret;
@@ -455,8 +453,6 @@ int afs_writepage(struct page *page, struct writeback_control *wbc)
}
wbc->nr_to_write -= ret;
- if (wbc->nonblocking && bdi_write_congested(bdi))
- wbc->encountered_congestion = 1;
_leave(" = 0");
return 0;
@@ -469,7 +465,6 @@ static int afs_writepages_region(struct address_space *mapping,
struct writeback_control *wbc,
pgoff_t index, pgoff_t end, pgoff_t *_next)
{
- struct backing_dev_info *bdi = mapping->backing_dev_info;
struct afs_writeback *wb;
struct page *page;
int ret, n;
@@ -529,11 +524,6 @@ static int afs_writepages_region(struct address_space *mapping,
wbc->nr_to_write -= ret;
- if (wbc->nonblocking && bdi_write_congested(bdi)) {
- wbc->encountered_congestion = 1;
- break;
- }
-
cond_resched();
} while (index < end && wbc->nr_to_write > 0);
@@ -548,24 +538,16 @@ static int afs_writepages_region(struct address_space *mapping,
int afs_writepages(struct address_space *mapping,
struct writeback_control *wbc)
{
- struct backing_dev_info *bdi = mapping->backing_dev_info;
pgoff_t start, end, next;
int ret;
_enter("");
- if (wbc->nonblocking && bdi_write_congested(bdi)) {
- wbc->encountered_congestion = 1;
- _leave(" = 0 [congest]");
- return 0;
- }
-
if (wbc->range_cyclic) {
start = mapping->writeback_index;
end = -1;
ret = afs_writepages_region(mapping, wbc, start, end, &next);
- if (start > 0 && wbc->nr_to_write > 0 && ret == 0 &&
- !(wbc->nonblocking && wbc->encountered_congestion))
+ if (start > 0 && wbc->nr_to_write > 0 && ret == 0)
ret = afs_writepages_region(mapping, wbc, 0, start,
&next);
mapping->writeback_index = next;
@@ -585,27 +567,6 @@ int afs_writepages(struct address_space *mapping,
}
/*
- * write an inode back
- */
-int afs_write_inode(struct inode *inode, int sync)
-{
- struct afs_vnode *vnode = AFS_FS_I(inode);
- int ret;
-
- _enter("{%x:%u},", vnode->fid.vid, vnode->fid.vnode);
-
- ret = 0;
- if (sync) {
- ret = filemap_fdatawait(inode->i_mapping);
- if (ret < 0)
- __mark_inode_dirty(inode, I_DIRTY_DATASYNC);
- }
-
- _leave(" = %d", ret);
- return ret;
-}
-
-/*
* completion of write to server
*/
void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
@@ -664,16 +625,14 @@ void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
/*
* write to an AFS file
*/
-ssize_t afs_file_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
+ssize_t afs_file_write(struct kiocb *iocb, struct iov_iter *from)
{
- struct dentry *dentry = iocb->ki_filp->f_path.dentry;
- struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
+ struct afs_vnode *vnode = AFS_FS_I(file_inode(iocb->ki_filp));
ssize_t result;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(from);
- _enter("{%x.%u},{%zu},%lu,",
- vnode->fid.vid, vnode->fid.vnode, count, nr_segs);
+ _enter("{%x.%u},{%zu},",
+ vnode->fid.vid, vnode->fid.vnode, count);
if (IS_SWAPFILE(&vnode->vfs_inode)) {
printk(KERN_INFO
@@ -684,7 +643,7 @@ ssize_t afs_file_write(struct kiocb *iocb, const struct iovec *iov,
if (!count)
return 0;
- result = generic_file_aio_write(iocb, iov, nr_segs, pos);
+ result = generic_file_write_iter(iocb, from);
if (IS_ERR_VALUE(result)) {
_leave(" = %zd", result);
return result;
@@ -701,7 +660,6 @@ int afs_writeback_all(struct afs_vnode *vnode)
{
struct address_space *mapping = vnode->vfs_inode.i_mapping;
struct writeback_control wbc = {
- .bdi = mapping->backing_dev_info,
.sync_mode = WB_SYNC_ALL,
.nr_to_write = LONG_MAX,
.range_cyclic = 1,
@@ -722,8 +680,10 @@ int afs_writeback_all(struct afs_vnode *vnode)
* - the return status from this call provides a reliable indication of
* whether any write errors occurred for this process.
*/
-int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
+int afs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
{
+ struct dentry *dentry = file->f_path.dentry;
+ struct inode *inode = file->f_mapping->host;
struct afs_writeback *wb, *xwb;
struct afs_vnode *vnode = AFS_FS_I(dentry->d_inode);
int ret;
@@ -732,12 +692,19 @@ int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
vnode->fid.vid, vnode->fid.vnode, dentry->d_name.name,
datasync);
+ ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
+ if (ret)
+ return ret;
+ mutex_lock(&inode->i_mutex);
+
/* use a writeback record as a marker in the queue - when this reaches
* the front of the queue, all the outstanding writes are either
* completed or rejected */
wb = kzalloc(sizeof(*wb), GFP_KERNEL);
- if (!wb)
- return -ENOMEM;
+ if (!wb) {
+ ret = -ENOMEM;
+ goto out;
+ }
wb->vnode = vnode;
wb->first = 0;
wb->last = -1;
@@ -760,7 +727,7 @@ int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
if (ret < 0) {
afs_put_writeback(wb);
_leave(" = %d [wb]", ret);
- return ret;
+ goto out;
}
/* wait for the preceding writes to actually complete */
@@ -769,6 +736,8 @@ int afs_fsync(struct file *file, struct dentry *dentry, int datasync)
vnode->writebacks.next == &wb->link);
afs_put_writeback(wb);
_leave(" = %d", ret);
+out:
+ mutex_unlock(&inode->i_mutex);
return ret;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 05:57:47 +0000