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-rw-r--r--fs/fuse/file.c96
1 files changed, 33 insertions, 63 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index ff102cbf16ea..5ef05b5c4cff 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -1145,13 +1145,11 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
struct address_space *mapping = file->f_mapping;
- size_t count = iov_iter_count(from);
ssize_t written = 0;
ssize_t written_buffered = 0;
struct inode *inode = mapping->host;
ssize_t err;
loff_t endbyte = 0;
- loff_t pos = iocb->ki_pos;
if (get_fuse_conn(inode)->writeback_cache) {
/* Update size (EOF optimization) and mode (SUID clearing) */
@@ -1167,14 +1165,10 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
/* We can write back this queue in page reclaim */
current->backing_dev_info = inode_to_bdi(inode);
- err = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode));
- if (err)
- goto out;
-
- if (count == 0)
+ err = generic_write_checks(iocb, from);
+ if (err <= 0)
goto out;
- iov_iter_truncate(from, count);
err = file_remove_suid(file);
if (err)
goto out;
@@ -1183,7 +1177,8 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
if (err)
goto out;
- if (file->f_flags & O_DIRECT) {
+ if (iocb->ki_flags & IOCB_DIRECT) {
+ loff_t pos = iocb->ki_pos;
written = generic_file_direct_write(iocb, from, pos);
if (written < 0 || !iov_iter_count(from))
goto out;
@@ -1209,9 +1204,9 @@ static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
written += written_buffered;
iocb->ki_pos = pos + written_buffered;
} else {
- written = fuse_perform_write(file, mapping, from, pos);
+ written = fuse_perform_write(file, mapping, from, iocb->ki_pos);
if (written >= 0)
- iocb->ki_pos = pos + written;
+ iocb->ki_pos += written;
}
out:
current->backing_dev_info = NULL;
@@ -1401,55 +1396,30 @@ static ssize_t __fuse_direct_read(struct fuse_io_priv *io,
return res;
}
-static ssize_t fuse_direct_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t fuse_direct_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
- struct fuse_io_priv io = { .async = 0, .file = file };
- struct iovec iov = { .iov_base = buf, .iov_len = count };
- struct iov_iter ii;
- iov_iter_init(&ii, READ, &iov, 1, count);
- return __fuse_direct_read(&io, &ii, ppos);
+ struct fuse_io_priv io = { .async = 0, .file = iocb->ki_filp };
+ return __fuse_direct_read(&io, to, &iocb->ki_pos);
}
-static ssize_t __fuse_direct_write(struct fuse_io_priv *io,
- struct iov_iter *iter,
- loff_t *ppos)
+static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
- struct file *file = io->file;
- struct inode *inode = file_inode(file);
- size_t count = iov_iter_count(iter);
- ssize_t res;
-
-
- res = generic_write_checks(file, ppos, &count, 0);
- if (!res) {
- iov_iter_truncate(iter, count);
- res = fuse_direct_io(io, iter, ppos, FUSE_DIO_WRITE);
- }
-
- fuse_invalidate_attr(inode);
-
- return res;
-}
-
-static ssize_t fuse_direct_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct iovec iov = { .iov_base = (void __user *)buf, .iov_len = count };
+ struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
- ssize_t res;
struct fuse_io_priv io = { .async = 0, .file = file };
- struct iov_iter ii;
- iov_iter_init(&ii, WRITE, &iov, 1, count);
+ ssize_t res;
if (is_bad_inode(inode))
return -EIO;
/* Don't allow parallel writes to the same file */
mutex_lock(&inode->i_mutex);
- res = __fuse_direct_write(&io, &ii, ppos);
+ res = generic_write_checks(iocb, from);
+ if (res > 0)
+ res = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
+ fuse_invalidate_attr(inode);
if (res > 0)
- fuse_write_update_size(inode, *ppos);
+ fuse_write_update_size(inode, iocb->ki_pos);
mutex_unlock(&inode->i_mutex);
return res;
@@ -2804,8 +2774,7 @@ static inline loff_t fuse_round_up(loff_t off)
}
static ssize_t
-fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
- loff_t offset)
+fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter, loff_t offset)
{
DECLARE_COMPLETION_ONSTACK(wait);
ssize_t ret = 0;
@@ -2822,15 +2791,15 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
inode = file->f_mapping->host;
i_size = i_size_read(inode);
- if ((rw == READ) && (offset > i_size))
+ if ((iov_iter_rw(iter) == READ) && (offset > i_size))
return 0;
/* optimization for short read */
- if (async_dio && rw != WRITE && offset + count > i_size) {
+ if (async_dio && iov_iter_rw(iter) != WRITE && offset + count > i_size) {
if (offset >= i_size)
return 0;
- count = min_t(loff_t, count, fuse_round_up(i_size - offset));
- iov_iter_truncate(iter, count);
+ iov_iter_truncate(iter, fuse_round_up(i_size - offset));
+ count = iov_iter_count(iter);
}
io = kmalloc(sizeof(struct fuse_io_priv), GFP_KERNEL);
@@ -2841,7 +2810,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
io->bytes = -1;
io->size = 0;
io->offset = offset;
- io->write = (rw == WRITE);
+ io->write = (iov_iter_rw(iter) == WRITE);
io->err = 0;
io->file = file;
/*
@@ -2856,16 +2825,19 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
* to wait on real async I/O requests, so we must submit this request
* synchronously.
*/
- if (!is_sync_kiocb(iocb) && (offset + count > i_size) && rw == WRITE)
+ if (!is_sync_kiocb(iocb) && (offset + count > i_size) &&
+ iov_iter_rw(iter) == WRITE)
io->async = false;
if (io->async && is_sync_kiocb(iocb))
io->done = &wait;
- if (rw == WRITE)
- ret = __fuse_direct_write(io, iter, &pos);
- else
+ if (iov_iter_rw(iter) == WRITE) {
+ ret = fuse_direct_io(io, iter, &pos, FUSE_DIO_WRITE);
+ fuse_invalidate_attr(inode);
+ } else {
ret = __fuse_direct_read(io, iter, &pos);
+ }
if (io->async) {
fuse_aio_complete(io, ret < 0 ? ret : 0, -1);
@@ -2880,7 +2852,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, struct iov_iter *iter,
kfree(io);
- if (rw == WRITE) {
+ if (iov_iter_rw(iter) == WRITE) {
if (ret > 0)
fuse_write_update_size(inode, pos);
else if (ret < 0 && offset + count > i_size)
@@ -2968,9 +2940,7 @@ out:
static const struct file_operations fuse_file_operations = {
.llseek = fuse_file_llseek,
- .read = new_sync_read,
.read_iter = fuse_file_read_iter,
- .write = new_sync_write,
.write_iter = fuse_file_write_iter,
.mmap = fuse_file_mmap,
.open = fuse_open,
@@ -2988,8 +2958,8 @@ static const struct file_operations fuse_file_operations = {
static const struct file_operations fuse_direct_io_file_operations = {
.llseek = fuse_file_llseek,
- .read = fuse_direct_read,
- .write = fuse_direct_write,
+ .read_iter = fuse_direct_read_iter,
+ .write_iter = fuse_direct_write_iter,
.mmap = fuse_direct_mmap,
.open = fuse_open,
.flush = fuse_flush,
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-02 02:01:55 +0100