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| author | Jan Kara <jack@suse.cz> | 2023-01-24 11:59:32 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2023-01-26 16:46:35 +0100 |
| commit | d5abfb1b7b26086db19ee430dea7282f01d4ef44 (patch) | |
| tree | 72efb488b61b015e89e43ea65cfbd7ffcc437aa3 /fs/udf | |
| parent | 79d3c6dbada4a20193467f72c531ab99c173bf4f (diff) | |
| download | lwn-d5abfb1b7b26086db19ee430dea7282f01d4ef44.tar.gz lwn-d5abfb1b7b26086db19ee430dea7282f01d4ef44.zip | |
udf: Convert in-ICB files to use udf_direct_IO()
Switching address_space_operations while a file is used is difficult to
do in a race-free way. To be able to use single address_space_operations
in UDF, make in-ICB files use udf_direct_IO().
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf')
| -rw-r--r-- | fs/udf/file.c | 8 | ||||
| -rw-r--r-- | fs/udf/inode.c | 5 | ||||
| -rw-r--r-- | fs/udf/udfdecl.h | 1 |
3 files changed, 6 insertions, 8 deletions
diff --git a/fs/udf/file.c b/fs/udf/file.c index 7a8dbad86e41..6bab6aa7770a 100644 --- a/fs/udf/file.c +++ b/fs/udf/file.c @@ -76,12 +76,6 @@ static int udf_adinicb_write_begin(struct file *file, return 0; } -static ssize_t udf_adinicb_direct_IO(struct kiocb *iocb, struct iov_iter *iter) -{ - /* Fallback to buffered I/O. */ - return 0; -} - static int udf_adinicb_write_end(struct file *file, struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata) @@ -103,7 +97,7 @@ const struct address_space_operations udf_adinicb_aops = { .writepages = udf_writepages, .write_begin = udf_adinicb_write_begin, .write_end = udf_adinicb_write_end, - .direct_IO = udf_adinicb_direct_IO, + .direct_IO = udf_direct_IO, }; static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf) diff --git a/fs/udf/inode.c b/fs/udf/inode.c index f0ab4dd0d8ce..d01b97e9e4f4 100644 --- a/fs/udf/inode.c +++ b/fs/udf/inode.c @@ -243,7 +243,7 @@ static int udf_write_begin(struct file *file, struct address_space *mapping, return ret; } -static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) +ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) { struct file *file = iocb->ki_filp; struct address_space *mapping = file->f_mapping; @@ -251,6 +251,9 @@ static ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter) size_t count = iov_iter_count(iter); ssize_t ret; + /* Fallback to buffered IO for in-ICB files */ + if (UDF_I(inode)->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) + return 0; ret = blockdev_direct_IO(iocb, inode, iter, udf_get_block); if (unlikely(ret < 0 && iov_iter_rw(iter) == WRITE)) udf_write_failed(mapping, iocb->ki_pos + count); diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h index 48647eab26a6..a851613465c6 100644 --- a/fs/udf/udfdecl.h +++ b/fs/udf/udfdecl.h @@ -161,6 +161,7 @@ extern void udf_evict_inode(struct inode *); extern int udf_write_inode(struct inode *, struct writeback_control *wbc); int udf_read_folio(struct file *file, struct folio *folio); int udf_writepages(struct address_space *mapping, struct writeback_control *wbc); +ssize_t udf_direct_IO(struct kiocb *iocb, struct iov_iter *iter); extern int8_t inode_bmap(struct inode *, sector_t, struct extent_position *, struct kernel_lb_addr *, uint32_t *, sector_t *); int udf_get_block(struct inode *, sector_t, struct buffer_head *, int); |