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fs: pass offset and result to backing_file end_write() callback

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This is needed for extending fuse inode size after fuse passthrough write.

Suggested-by: Miklos Szeredi <miklos@szeredi.hu>
Link: https://lore.kernel.org/linux-fsdevel/CAJfpegs=cvZ_NYy6Q_D42XhYS=Sjj5poM1b5TzXzOVvX=R36aA@mail.gmail.com/
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
This commit is contained in:
Amir Goldstein 2024-10-14 21:27:58 +02:00 committed by Miklos Szeredi
parent 9852d85ec9
commit f03b296e8b
4 changed files with 15 additions and 10 deletions
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8
fs/backing-file.c
View File

@ -80,7 +80,7 @@ struct backing_aio {
refcount_t ref;
struct kiocb *orig_iocb;
/* used for aio completion */
void (*end_write)(struct file *);
void (*end_write)(struct file *, loff_t, ssize_t);
struct work_struct work;
long res;
};
@ -109,7 +109,7 @@ static void backing_aio_cleanup(struct backing_aio *aio, long res)
struct kiocb *orig_iocb = aio->orig_iocb;
if (aio->end_write)
aio->end_write(orig_iocb->ki_filp);
aio->end_write(orig_iocb->ki_filp, iocb->ki_pos, res);
orig_iocb->ki_pos = iocb->ki_pos;
backing_aio_put(aio);
@ -239,7 +239,7 @@ ssize_t backing_file_write_iter(struct file *file, struct iov_iter *iter,
ret = vfs_iter_write(file, iter, &iocb->ki_pos, rwf);
if (ctx->end_write)
ctx->end_write(ctx->user_file);
ctx->end_write(ctx->user_file, iocb->ki_pos, ret);
} else {
struct backing_aio *aio;
@ -317,7 +317,7 @@ ssize_t backing_file_splice_write(struct pipe_inode_info *pipe,
revert_creds(old_cred);
if (ctx->end_write)
ctx->end_write(ctx->user_file);
ctx->end_write(ctx->user_file, ppos ? *ppos : 0, ret);
return ret;
}

6
fs/fuse/passthrough.c
View File

@ -18,7 +18,7 @@ static void fuse_file_accessed(struct file *file)
fuse_invalidate_atime(inode);
}
static void fuse_file_modified(struct file *file)
static void fuse_passthrough_end_write(struct file *file, loff_t pos, ssize_t ret)
{
struct inode *inode = file_inode(file);
@ -63,7 +63,7 @@ ssize_t fuse_passthrough_write_iter(struct kiocb *iocb,
struct backing_file_ctx ctx = {
.cred = ff->cred,
.user_file = file,
.end_write = fuse_file_modified,
.end_write = fuse_passthrough_end_write,
};
pr_debug("%s: backing_file=0x%p, pos=%lld, len=%zu\n", __func__,
@ -110,7 +110,7 @@ ssize_t fuse_passthrough_splice_write(struct pipe_inode_info *pipe,
struct backing_file_ctx ctx = {
.cred = ff->cred,
.user_file = out,
.end_write = fuse_file_modified,
.end_write = fuse_passthrough_end_write,
};
pr_debug("%s: backing_file=0x%p, pos=%lld, len=%zu, flags=0x%x\n", __func__,

9
fs/overlayfs/file.c
View File

@ -231,6 +231,11 @@ static void ovl_file_modified(struct file *file)
ovl_copyattr(file_inode(file));
}
static void ovl_file_end_write(struct file *file, loff_t pos, ssize_t ret)
{
ovl_file_modified(file);
}
static void ovl_file_accessed(struct file *file)
{
struct inode *inode, *upperinode;
@ -294,7 +299,7 @@ static ssize_t ovl_write_iter(struct kiocb *iocb, struct iov_iter *iter)
struct backing_file_ctx ctx = {
.cred = ovl_creds(inode->i_sb),
.user_file = file,
.end_write = ovl_file_modified,
.end_write = ovl_file_end_write,
};
if (!iov_iter_count(iter))
@ -364,7 +369,7 @@ static ssize_t ovl_splice_write(struct pipe_inode_info *pipe, struct file *out,
struct backing_file_ctx ctx = {
.cred = ovl_creds(inode->i_sb),
.user_file = out,
.end_write = ovl_file_modified,
.end_write = ovl_file_end_write,
};
inode_lock(inode);

2
include/linux/backing-file.h
View File

@ -16,7 +16,7 @@ struct backing_file_ctx {
const struct cred *cred;
struct file *user_file;
void (*accessed)(struct file *);
void (*end_write)(struct file *);
void (*end_write)(struct file *, loff_t, ssize_t);
};
struct file *backing_file_open(const struct path *user_path, int flags,