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-rw-r--r--fs/fuse/file.c136
1 files changed, 37 insertions, 99 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index 89d97f6188e0..1c7599ed9062 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -19,7 +19,6 @@
#include <linux/uio.h>
#include <linux/fs.h>
#include <linux/filelock.h>
-#include <linux/file.h>
static int fuse_send_open(struct fuse_mount *fm, u64 nodeid,
unsigned int open_flags, int opcode,
@@ -479,36 +478,48 @@ static void fuse_sync_writes(struct inode *inode)
fuse_release_nowrite(inode);
}
-struct fuse_flush_args {
- struct fuse_args args;
- struct fuse_flush_in inarg;
- struct work_struct work;
- struct file *file;
-};
-
-static int fuse_do_flush(struct fuse_flush_args *fa)
+static int fuse_flush(struct file *file, fl_owner_t id)
{
- int err;
- struct inode *inode = file_inode(fa->file);
+ struct inode *inode = file_inode(file);
struct fuse_mount *fm = get_fuse_mount(inode);
+ struct fuse_file *ff = file->private_data;
+ struct fuse_flush_in inarg;
+ FUSE_ARGS(args);
+ int err;
+
+ if (fuse_is_bad(inode))
+ return -EIO;
+
+ if (ff->open_flags & FOPEN_NOFLUSH && !fm->fc->writeback_cache)
+ return 0;
err = write_inode_now(inode, 1);
if (err)
- goto out;
+ return err;
inode_lock(inode);
fuse_sync_writes(inode);
inode_unlock(inode);
- err = filemap_check_errors(fa->file->f_mapping);
+ err = filemap_check_errors(file->f_mapping);
if (err)
- goto out;
+ return err;
err = 0;
if (fm->fc->no_flush)
goto inval_attr_out;
- err = fuse_simple_request(fm, &fa->args);
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.fh = ff->fh;
+ inarg.lock_owner = fuse_lock_owner_id(fm->fc, id);
+ args.opcode = FUSE_FLUSH;
+ args.nodeid = get_node_id(inode);
+ args.in_numargs = 1;
+ args.in_args[0].size = sizeof(inarg);
+ args.in_args[0].value = &inarg;
+ args.force = true;
+
+ err = fuse_simple_request(fm, &args);
if (err == -ENOSYS) {
fm->fc->no_flush = 1;
err = 0;
@@ -521,57 +532,9 @@ inval_attr_out:
*/
if (!err && fm->fc->writeback_cache)
fuse_invalidate_attr_mask(inode, STATX_BLOCKS);
-
-out:
- fput(fa->file);
- kfree(fa);
return err;
}
-static void fuse_flush_async(struct work_struct *work)
-{
- struct fuse_flush_args *fa = container_of(work, typeof(*fa), work);
-
- fuse_do_flush(fa);
-}
-
-static int fuse_flush(struct file *file, fl_owner_t id)
-{
- struct fuse_flush_args *fa;
- struct inode *inode = file_inode(file);
- struct fuse_mount *fm = get_fuse_mount(inode);
- struct fuse_file *ff = file->private_data;
-
- if (fuse_is_bad(inode))
- return -EIO;
-
- if (ff->open_flags & FOPEN_NOFLUSH && !fm->fc->writeback_cache)
- return 0;
-
- fa = kzalloc(sizeof(*fa), GFP_KERNEL);
- if (!fa)
- return -ENOMEM;
-
- fa->inarg.fh = ff->fh;
- fa->inarg.lock_owner = fuse_lock_owner_id(fm->fc, id);
- fa->args.opcode = FUSE_FLUSH;
- fa->args.nodeid = get_node_id(inode);
- fa->args.in_numargs = 1;
- fa->args.in_args[0].size = sizeof(fa->inarg);
- fa->args.in_args[0].value = &fa->inarg;
- fa->args.force = true;
- fa->file = get_file(file);
-
- /* Don't wait if the task is exiting */
- if (current->flags & PF_EXITING) {
- INIT_WORK(&fa->work, fuse_flush_async);
- schedule_work(&fa->work);
- return 0;
- }
-
- return fuse_do_flush(fa);
-}
-
int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
int datasync, int opcode)
{
@@ -1280,13 +1243,13 @@ static inline unsigned int fuse_wr_pages(loff_t pos, size_t len,
max_pages);
}
-static ssize_t fuse_perform_write(struct kiocb *iocb,
- struct address_space *mapping,
- struct iov_iter *ii, loff_t pos)
+static ssize_t fuse_perform_write(struct kiocb *iocb, struct iov_iter *ii)
{
+ struct address_space *mapping = iocb->ki_filp->f_mapping;
struct inode *inode = mapping->host;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
+ loff_t pos = iocb->ki_pos;
int err = 0;
ssize_t res = 0;
@@ -1329,7 +1292,10 @@ static ssize_t fuse_perform_write(struct kiocb *iocb,
fuse_write_update_attr(inode, pos, res);
clear_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
- return res > 0 ? res : err;
+ if (!res)
+ return err;
+ iocb->ki_pos += res;
+ return res;
}
static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
@@ -1337,11 +1303,9 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
ssize_t written = 0;
- ssize_t written_buffered = 0;
struct inode *inode = mapping->host;
ssize_t err;
struct fuse_conn *fc = get_fuse_conn(inode);
- loff_t endbyte = 0;
if (fc->writeback_cache) {
/* Update size (EOF optimization) and mode (SUID clearing) */
@@ -1362,9 +1326,6 @@ static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
writethrough:
inode_lock(inode);
- /* We can write back this queue in page reclaim */
- current->backing_dev_info = inode_to_bdi(inode);
-
err = generic_write_checks(iocb, from);
if (err <= 0)
goto out;
@@ -1378,38 +1339,15 @@ writethrough:
goto out;
if (iocb->ki_flags & IOCB_DIRECT) {
- loff_t pos = iocb->ki_pos;
written = generic_file_direct_write(iocb, from);
if (written < 0 || !iov_iter_count(from))
goto out;
-
- pos += written;
-
- written_buffered = fuse_perform_write(iocb, mapping, from, pos);
- if (written_buffered < 0) {
- err = written_buffered;
- goto out;
- }
- endbyte = pos + written_buffered - 1;
-
- err = filemap_write_and_wait_range(file->f_mapping, pos,
- endbyte);
- if (err)
- goto out;
-
- invalidate_mapping_pages(file->f_mapping,
- pos >> PAGE_SHIFT,
- endbyte >> PAGE_SHIFT);
-
- written += written_buffered;
- iocb->ki_pos = pos + written_buffered;
+ written = direct_write_fallback(iocb, from, written,
+ fuse_perform_write(iocb, from));
} else {
- written = fuse_perform_write(iocb, mapping, from, iocb->ki_pos);
- if (written >= 0)
- iocb->ki_pos += written;
+ written = fuse_perform_write(iocb, from);
}
out:
- current->backing_dev_info = NULL;
inode_unlock(inode);
if (written > 0)
written = generic_write_sync(iocb, written);
@@ -3252,7 +3190,7 @@ static const struct file_operations fuse_file_operations = {
.lock = fuse_file_lock,
.get_unmapped_area = thp_get_unmapped_area,
.flock = fuse_file_flock,
- .splice_read = generic_file_splice_read,
+ .splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.unlocked_ioctl = fuse_file_ioctl,
.compat_ioctl = fuse_file_compat_ioctl,
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-04-19 06:10:45 +0000