diff options
| -rw-r--r-- | Documentation/filesystems/iomap/operations.rst | 11 | ||||
| -rw-r--r-- | fs/iomap/buffered-io.c | 10 | ||||
| -rw-r--r-- | fs/xfs/xfs_aops.c | 13 | ||||
| -rw-r--r-- | include/linux/iomap.h | 12 |
4 files changed, 26 insertions, 20 deletions
diff --git a/Documentation/filesystems/iomap/operations.rst b/Documentation/filesystems/iomap/operations.rst index 2c7f5df9d8b0..04fc7a49067d 100644 --- a/Documentation/filesystems/iomap/operations.rst +++ b/Documentation/filesystems/iomap/operations.rst @@ -283,7 +283,7 @@ The ``ops`` structure must be specified and is as follows: struct iomap_writeback_ops { int (*map_blocks)(struct iomap_writepage_ctx *wpc, struct inode *inode, loff_t offset, unsigned len); - int (*prepare_ioend)(struct iomap_ioend *ioend, int status); + int (*submit_ioend)(struct iomap_writepage_ctx *wpc, int status); void (*discard_folio)(struct folio *folio, loff_t pos); }; @@ -306,13 +306,12 @@ The fields are as follows: purpose. This function must be supplied by the filesystem. - - ``prepare_ioend``: Enables filesystems to transform the writeback - ioend or perform any other preparatory work before the writeback I/O - is submitted. + - ``submit_ioend``: Allows the file systems to hook into writeback bio + submission. This might include pre-write space accounting updates, or installing a custom ``->bi_end_io`` function for internal purposes, such as deferring the ioend completion to a workqueue to run metadata update - transactions from process context. + transactions from process context before submitting the bio. This function is optional. - ``discard_folio``: iomap calls this function after ``->map_blocks`` @@ -341,7 +340,7 @@ This can happen in interrupt or process context, depending on the storage device. Filesystems that need to update internal bookkeeping (e.g. unwritten -extent conversions) should provide a ``->prepare_ioend`` function to +extent conversions) should provide a ``->submit_ioend`` function to set ``struct iomap_end::bio::bi_end_io`` to its own function. This function should call ``iomap_finish_ioends`` after finishing its own work (e.g. unwritten extent conversion). diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index d303e6c8900c..7952bf004bdb 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -1675,7 +1675,7 @@ static void iomap_writepage_end_bio(struct bio *bio) } /* - * Submit the final bio for an ioend. + * Submit an ioend. * * If @error is non-zero, it means that we have a situation where some part of * the submission process has failed after we've marked pages for writeback. @@ -1694,14 +1694,14 @@ static int iomap_submit_ioend(struct iomap_writepage_ctx *wpc, int error) * failure happened so that the file system end I/O handler gets called * to clean up. */ - if (wpc->ops->prepare_ioend) - error = wpc->ops->prepare_ioend(wpc->ioend, error); + if (wpc->ops->submit_ioend) + error = wpc->ops->submit_ioend(wpc, error); + else if (!error) + submit_bio(&wpc->ioend->io_bio); if (error) { wpc->ioend->io_bio.bi_status = errno_to_blk_status(error); bio_endio(&wpc->ioend->io_bio); - } else { - submit_bio(&wpc->ioend->io_bio); } wpc->ioend = NULL; diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c index 67877c36ed11..aa88895673d8 100644 --- a/fs/xfs/xfs_aops.c +++ b/fs/xfs/xfs_aops.c @@ -395,10 +395,11 @@ allocate_blocks: } static int -xfs_prepare_ioend( - struct iomap_ioend *ioend, +xfs_submit_ioend( + struct iomap_writepage_ctx *wpc, int status) { + struct iomap_ioend *ioend = wpc->ioend; unsigned int nofs_flag; /* @@ -420,7 +421,11 @@ xfs_prepare_ioend( if (xfs_ioend_is_append(ioend) || ioend->io_type == IOMAP_UNWRITTEN || (ioend->io_flags & IOMAP_F_SHARED)) ioend->io_bio.bi_end_io = xfs_end_bio; - return status; + + if (status) + return status; + submit_bio(&ioend->io_bio); + return 0; } /* @@ -462,7 +467,7 @@ xfs_discard_folio( static const struct iomap_writeback_ops xfs_writeback_ops = { .map_blocks = xfs_map_blocks, - .prepare_ioend = xfs_prepare_ioend, + .submit_ioend = xfs_submit_ioend, .discard_folio = xfs_discard_folio, }; diff --git a/include/linux/iomap.h b/include/linux/iomap.h index 75bf54e76f3b..dc8df4f779d4 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -362,12 +362,14 @@ struct iomap_writeback_ops { loff_t offset, unsigned len); /* - * Optional, allows the file systems to perform actions just before - * submitting the bio and/or override the bio end_io handler for complex - * operations like copy on write extent manipulation or unwritten extent - * conversions. + * Optional, allows the file systems to hook into bio submission, + * including overriding the bi_end_io handler. + * + * Returns 0 if the bio was successfully submitted, or a negative + * error code if status was non-zero or another error happened and + * the bio could not be submitted. */ - int (*prepare_ioend)(struct iomap_ioend *ioend, int status); + int (*submit_ioend)(struct iomap_writepage_ctx *wpc, int status); /* * Optional, allows the file system to discard state on a page where |