diff options
Diffstat (limited to 'fs/fuse/file.c')
| -rw-r--r-- | fs/fuse/file.c | 62 |
1 files changed, 53 insertions, 9 deletions
diff --git a/fs/fuse/file.c b/fs/fuse/file.c index d1c9b85b3f5..35f28103314 100644 --- a/fs/fuse/file.c +++ b/fs/fuse/file.c @@ -16,6 +16,7 @@ #include <linux/compat.h> #include <linux/swap.h> #include <linux/aio.h> +#include <linux/falloc.h> static const struct file_operations fuse_direct_io_file_operations; @@ -1278,7 +1279,10 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov, iov_iter_init(&ii, iov, nr_segs, count, 0); - req = fuse_get_req(fc, fuse_iter_npages(&ii)); + if (io->async) + req = fuse_get_req_for_background(fc, fuse_iter_npages(&ii)); + else + req = fuse_get_req(fc, fuse_iter_npages(&ii)); if (IS_ERR(req)) return PTR_ERR(req); @@ -1314,7 +1318,11 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov, break; if (count) { fuse_put_request(fc, req); - req = fuse_get_req(fc, fuse_iter_npages(&ii)); + if (io->async) + req = fuse_get_req_for_background(fc, + fuse_iter_npages(&ii)); + else + req = fuse_get_req(fc, fuse_iter_npages(&ii)); if (IS_ERR(req)) break; } @@ -2365,6 +2373,11 @@ static void fuse_do_truncate(struct file *file) fuse_do_setattr(inode, &attr, file); } +static inline loff_t fuse_round_up(loff_t off) +{ + return round_up(off, FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT); +} + static ssize_t fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, loff_t offset, unsigned long nr_segs) @@ -2372,6 +2385,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, ssize_t ret = 0; struct file *file = iocb->ki_filp; struct fuse_file *ff = file->private_data; + bool async_dio = ff->fc->async_dio; loff_t pos = 0; struct inode *inode; loff_t i_size; @@ -2383,10 +2397,10 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, i_size = i_size_read(inode); /* optimization for short read */ - if (rw != WRITE && offset + count > i_size) { + if (async_dio && rw != WRITE && offset + count > i_size) { if (offset >= i_size) return 0; - count = i_size - offset; + count = min_t(loff_t, count, fuse_round_up(i_size - offset)); } io = kmalloc(sizeof(struct fuse_io_priv), GFP_KERNEL); @@ -2404,7 +2418,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, * By default, we want to optimize all I/Os with async request * submission to the client filesystem if supported. */ - io->async = ff->fc->async_dio; + io->async = async_dio; io->iocb = iocb; /* @@ -2412,7 +2426,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, * to wait on real async I/O requests, so we must submit this request * synchronously. */ - if (!is_sync_kiocb(iocb) && (offset + count > i_size)) + if (!is_sync_kiocb(iocb) && (offset + count > i_size) && rw == WRITE) io->async = false; if (rw == WRITE) @@ -2424,7 +2438,7 @@ fuse_direct_IO(int rw, struct kiocb *iocb, const struct iovec *iov, fuse_aio_complete(io, ret < 0 ? ret : 0, -1); /* we have a non-extending, async request, so return */ - if (ret > 0 && !is_sync_kiocb(iocb)) + if (!is_sync_kiocb(iocb)) return -EIOCBQUEUED; ret = wait_on_sync_kiocb(iocb); @@ -2446,6 +2460,7 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, loff_t length) { struct fuse_file *ff = file->private_data; + struct inode *inode = file->f_inode; struct fuse_conn *fc = ff->fc; struct fuse_req *req; struct fuse_fallocate_in inarg = { @@ -2455,13 +2470,23 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, .mode = mode }; int err; + bool lock_inode = !(mode & FALLOC_FL_KEEP_SIZE) || + (mode & FALLOC_FL_PUNCH_HOLE); if (fc->no_fallocate) return -EOPNOTSUPP; + if (lock_inode) { + mutex_lock(&inode->i_mutex); + if (mode & FALLOC_FL_PUNCH_HOLE) + fuse_set_nowrite(inode); + } + req = fuse_get_req_nopages(fc); - if (IS_ERR(req)) - return PTR_ERR(req); + if (IS_ERR(req)) { + err = PTR_ERR(req); + goto out; + } req->in.h.opcode = FUSE_FALLOCATE; req->in.h.nodeid = ff->nodeid; @@ -2476,6 +2501,25 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset, } fuse_put_request(fc, req); + if (err) + goto out; + + /* we could have extended the file */ + if (!(mode & FALLOC_FL_KEEP_SIZE)) + fuse_write_update_size(inode, offset + length); + + if (mode & FALLOC_FL_PUNCH_HOLE) + truncate_pagecache_range(inode, offset, offset + length - 1); + + fuse_invalidate_attr(inode); + +out: + if (lock_inode) { + if (mode & FALLOC_FL_PUNCH_HOLE) + fuse_release_nowrite(inode); + mutex_unlock(&inode->i_mutex); + } + return err; } |