| Message ID | 20210719103520.495450-22-hch@lst.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [01/27] iomap: fix a trivial comment typo in trace.h | expand |
On Mon, Jul 19, 2021 at 12:35:14PM +0200, Christoph Hellwig wrote: > iomap_apply is unused now, so remove it. > > Signed-off-by: Christoph Hellwig <hch@lst.de> > --- > fs/iomap/Makefile | 1 - > fs/iomap/apply.c | 99 ------------------------------------------- > fs/iomap/trace.h | 40 ----------------- > include/linux/iomap.h | 10 ----- > 4 files changed, 150 deletions(-) mmm, negative LOC delta ;) Reviewed-by: Darrick J. Wong <djwong@kernel.org> --D > delete mode 100644 fs/iomap/apply.c > > diff --git a/fs/iomap/Makefile b/fs/iomap/Makefile > index 85034deb5a2f19..ebd9866d80ae90 100644 > --- a/fs/iomap/Makefile > +++ b/fs/iomap/Makefile > @@ -9,7 +9,6 @@ ccflags-y += -I $(srctree)/$(src) # needed for trace events > obj-$(CONFIG_FS_IOMAP) += iomap.o > > iomap-y += trace.o \ > - apply.o \ > iter.o \ > buffered-io.o \ > direct-io.o \ > diff --git a/fs/iomap/apply.c b/fs/iomap/apply.c > deleted file mode 100644 > index 26ab6563181fc6..00000000000000 > --- a/fs/iomap/apply.c > +++ /dev/null > @@ -1,99 +0,0 @@ > -// SPDX-License-Identifier: GPL-2.0 > -/* > - * Copyright (C) 2010 Red Hat, Inc. > - * Copyright (c) 2016-2018 Christoph Hellwig. > - */ > -#include <linux/module.h> > -#include <linux/compiler.h> > -#include <linux/fs.h> > -#include <linux/iomap.h> > -#include "trace.h" > - > -/* > - * Execute a iomap write on a segment of the mapping that spans a > - * contiguous range of pages that have identical block mapping state. > - * > - * This avoids the need to map pages individually, do individual allocations > - * for each page and most importantly avoid the need for filesystem specific > - * locking per page. Instead, all the operations are amortised over the entire > - * range of pages. It is assumed that the filesystems will lock whatever > - * resources they require in the iomap_begin call, and release them in the > - * iomap_end call. > - */ > -loff_t > -iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags, > - const struct iomap_ops *ops, void *data, iomap_actor_t actor) > -{ > - struct iomap iomap = { .type = IOMAP_HOLE }; > - struct iomap srcmap = { .type = IOMAP_HOLE }; > - loff_t written = 0, ret; > - u64 end; > - > - trace_iomap_apply(inode, pos, length, flags, ops, actor, _RET_IP_); > - > - /* > - * Need to map a range from start position for length bytes. This can > - * span multiple pages - it is only guaranteed to return a range of a > - * single type of pages (e.g. all into a hole, all mapped or all > - * unwritten). Failure at this point has nothing to undo. > - * > - * If allocation is required for this range, reserve the space now so > - * that the allocation is guaranteed to succeed later on. Once we copy > - * the data into the page cache pages, then we cannot fail otherwise we > - * expose transient stale data. If the reserve fails, we can safely > - * back out at this point as there is nothing to undo. > - */ > - ret = ops->iomap_begin(inode, pos, length, flags, &iomap, &srcmap); > - if (ret) > - return ret; > - if (WARN_ON(iomap.offset > pos)) { > - written = -EIO; > - goto out; > - } > - if (WARN_ON(iomap.length == 0)) { > - written = -EIO; > - goto out; > - } > - > - trace_iomap_apply_dstmap(inode, &iomap); > - if (srcmap.type != IOMAP_HOLE) > - trace_iomap_apply_srcmap(inode, &srcmap); > - > - /* > - * Cut down the length to the one actually provided by the filesystem, > - * as it might not be able to give us the whole size that we requested. > - */ > - end = iomap.offset + iomap.length; > - if (srcmap.type != IOMAP_HOLE) > - end = min(end, srcmap.offset + srcmap.length); > - if (pos + length > end) > - length = end - pos; > - > - /* > - * Now that we have guaranteed that the space allocation will succeed, > - * we can do the copy-in page by page without having to worry about > - * failures exposing transient data. > - * > - * To support COW operations, we read in data for partially blocks from > - * the srcmap if the file system filled it in. In that case we the > - * length needs to be limited to the earlier of the ends of the iomaps. > - * If the file system did not provide a srcmap we pass in the normal > - * iomap into the actors so that they don't need to have special > - * handling for the two cases. > - */ > - written = actor(inode, pos, length, data, &iomap, > - srcmap.type != IOMAP_HOLE ? &srcmap : &iomap); > - > -out: > - /* > - * Now the data has been copied, commit the range we've copied. This > - * should not fail unless the filesystem has had a fatal error. > - */ > - if (ops->iomap_end) { > - ret = ops->iomap_end(inode, pos, length, > - written > 0 ? written : 0, > - flags, &iomap); > - } > - > - return written ? written : ret; > -} > diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h > index 1012d7af6b689b..f1519f9a140320 100644 > --- a/fs/iomap/trace.h > +++ b/fs/iomap/trace.h > @@ -138,49 +138,9 @@ DECLARE_EVENT_CLASS(iomap_class, > DEFINE_EVENT(iomap_class, name, \ > TP_PROTO(struct inode *inode, struct iomap *iomap), \ > TP_ARGS(inode, iomap)) > -DEFINE_IOMAP_EVENT(iomap_apply_dstmap); > -DEFINE_IOMAP_EVENT(iomap_apply_srcmap); > DEFINE_IOMAP_EVENT(iomap_iter_dstmap); > DEFINE_IOMAP_EVENT(iomap_iter_srcmap); > > -TRACE_EVENT(iomap_apply, > - TP_PROTO(struct inode *inode, loff_t pos, loff_t length, > - unsigned int flags, const void *ops, void *actor, > - unsigned long caller), > - TP_ARGS(inode, pos, length, flags, ops, actor, caller), > - TP_STRUCT__entry( > - __field(dev_t, dev) > - __field(u64, ino) > - __field(loff_t, pos) > - __field(loff_t, length) > - __field(unsigned int, flags) > - __field(const void *, ops) > - __field(void *, actor) > - __field(unsigned long, caller) > - ), > - TP_fast_assign( > - __entry->dev = inode->i_sb->s_dev; > - __entry->ino = inode->i_ino; > - __entry->pos = pos; > - __entry->length = length; > - __entry->flags = flags; > - __entry->ops = ops; > - __entry->actor = actor; > - __entry->caller = caller; > - ), > - TP_printk("dev %d:%d ino 0x%llx pos %lld length %lld flags %s (0x%x) " > - "ops %ps caller %pS actor %ps", > - MAJOR(__entry->dev), MINOR(__entry->dev), > - __entry->ino, > - __entry->pos, > - __entry->length, > - __print_flags(__entry->flags, "|", IOMAP_FLAGS_STRINGS), > - __entry->flags, > - __entry->ops, > - (void *)__entry->caller, > - __entry->actor) > -); > - > TRACE_EVENT(iomap_iter, > TP_PROTO(struct iomap_iter *iter, const void *ops, > unsigned long caller), > diff --git a/include/linux/iomap.h b/include/linux/iomap.h > index da01226886eca4..2f13e34c2c0b0b 100644 > --- a/include/linux/iomap.h > +++ b/include/linux/iomap.h > @@ -199,16 +199,6 @@ static inline struct iomap *iomap_iter_srcmap(struct iomap_iter *i) > return &i->iomap; > } > > -/* > - * Main iomap iterator function. > - */ > -typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, > - void *data, struct iomap *iomap, struct iomap *srcmap); > - > -loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, > - unsigned flags, const struct iomap_ops *ops, void *data, > - iomap_actor_t actor); > - > ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, > const struct iomap_ops *ops); > int iomap_readpage(struct page *page, const struct iomap_ops *ops); > -- > 2.30.2 >
diff --git a/fs/iomap/Makefile b/fs/iomap/Makefile index 85034deb5a2f19..ebd9866d80ae90 100644 --- a/fs/iomap/Makefile +++ b/fs/iomap/Makefile @@ -9,7 +9,6 @@ ccflags-y += -I $(srctree)/$(src) # needed for trace events obj-$(CONFIG_FS_IOMAP) += iomap.o iomap-y += trace.o \ - apply.o \ iter.o \ buffered-io.o \ direct-io.o \ diff --git a/fs/iomap/apply.c b/fs/iomap/apply.c deleted file mode 100644 index 26ab6563181fc6..00000000000000 --- a/fs/iomap/apply.c +++ /dev/null @@ -1,99 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * Copyright (C) 2010 Red Hat, Inc. - * Copyright (c) 2016-2018 Christoph Hellwig. - */ -#include <linux/module.h> -#include <linux/compiler.h> -#include <linux/fs.h> -#include <linux/iomap.h> -#include "trace.h" - -/* - * Execute a iomap write on a segment of the mapping that spans a - * contiguous range of pages that have identical block mapping state. - * - * This avoids the need to map pages individually, do individual allocations - * for each page and most importantly avoid the need for filesystem specific - * locking per page. Instead, all the operations are amortised over the entire - * range of pages. It is assumed that the filesystems will lock whatever - * resources they require in the iomap_begin call, and release them in the - * iomap_end call. - */ -loff_t -iomap_apply(struct inode *inode, loff_t pos, loff_t length, unsigned flags, - const struct iomap_ops *ops, void *data, iomap_actor_t actor) -{ - struct iomap iomap = { .type = IOMAP_HOLE }; - struct iomap srcmap = { .type = IOMAP_HOLE }; - loff_t written = 0, ret; - u64 end; - - trace_iomap_apply(inode, pos, length, flags, ops, actor, _RET_IP_); - - /* - * Need to map a range from start position for length bytes. This can - * span multiple pages - it is only guaranteed to return a range of a - * single type of pages (e.g. all into a hole, all mapped or all - * unwritten). Failure at this point has nothing to undo. - * - * If allocation is required for this range, reserve the space now so - * that the allocation is guaranteed to succeed later on. Once we copy - * the data into the page cache pages, then we cannot fail otherwise we - * expose transient stale data. If the reserve fails, we can safely - * back out at this point as there is nothing to undo. - */ - ret = ops->iomap_begin(inode, pos, length, flags, &iomap, &srcmap); - if (ret) - return ret; - if (WARN_ON(iomap.offset > pos)) { - written = -EIO; - goto out; - } - if (WARN_ON(iomap.length == 0)) { - written = -EIO; - goto out; - } - - trace_iomap_apply_dstmap(inode, &iomap); - if (srcmap.type != IOMAP_HOLE) - trace_iomap_apply_srcmap(inode, &srcmap); - - /* - * Cut down the length to the one actually provided by the filesystem, - * as it might not be able to give us the whole size that we requested. - */ - end = iomap.offset + iomap.length; - if (srcmap.type != IOMAP_HOLE) - end = min(end, srcmap.offset + srcmap.length); - if (pos + length > end) - length = end - pos; - - /* - * Now that we have guaranteed that the space allocation will succeed, - * we can do the copy-in page by page without having to worry about - * failures exposing transient data. - * - * To support COW operations, we read in data for partially blocks from - * the srcmap if the file system filled it in. In that case we the - * length needs to be limited to the earlier of the ends of the iomaps. - * If the file system did not provide a srcmap we pass in the normal - * iomap into the actors so that they don't need to have special - * handling for the two cases. - */ - written = actor(inode, pos, length, data, &iomap, - srcmap.type != IOMAP_HOLE ? &srcmap : &iomap); - -out: - /* - * Now the data has been copied, commit the range we've copied. This - * should not fail unless the filesystem has had a fatal error. - */ - if (ops->iomap_end) { - ret = ops->iomap_end(inode, pos, length, - written > 0 ? written : 0, - flags, &iomap); - } - - return written ? written : ret; -} diff --git a/fs/iomap/trace.h b/fs/iomap/trace.h index 1012d7af6b689b..f1519f9a140320 100644 --- a/fs/iomap/trace.h +++ b/fs/iomap/trace.h @@ -138,49 +138,9 @@ DECLARE_EVENT_CLASS(iomap_class, DEFINE_EVENT(iomap_class, name, \ TP_PROTO(struct inode *inode, struct iomap *iomap), \ TP_ARGS(inode, iomap)) -DEFINE_IOMAP_EVENT(iomap_apply_dstmap); -DEFINE_IOMAP_EVENT(iomap_apply_srcmap); DEFINE_IOMAP_EVENT(iomap_iter_dstmap); DEFINE_IOMAP_EVENT(iomap_iter_srcmap); -TRACE_EVENT(iomap_apply, - TP_PROTO(struct inode *inode, loff_t pos, loff_t length, - unsigned int flags, const void *ops, void *actor, - unsigned long caller), - TP_ARGS(inode, pos, length, flags, ops, actor, caller), - TP_STRUCT__entry( - __field(dev_t, dev) - __field(u64, ino) - __field(loff_t, pos) - __field(loff_t, length) - __field(unsigned int, flags) - __field(const void *, ops) - __field(void *, actor) - __field(unsigned long, caller) - ), - TP_fast_assign( - __entry->dev = inode->i_sb->s_dev; - __entry->ino = inode->i_ino; - __entry->pos = pos; - __entry->length = length; - __entry->flags = flags; - __entry->ops = ops; - __entry->actor = actor; - __entry->caller = caller; - ), - TP_printk("dev %d:%d ino 0x%llx pos %lld length %lld flags %s (0x%x) " - "ops %ps caller %pS actor %ps", - MAJOR(__entry->dev), MINOR(__entry->dev), - __entry->ino, - __entry->pos, - __entry->length, - __print_flags(__entry->flags, "|", IOMAP_FLAGS_STRINGS), - __entry->flags, - __entry->ops, - (void *)__entry->caller, - __entry->actor) -); - TRACE_EVENT(iomap_iter, TP_PROTO(struct iomap_iter *iter, const void *ops, unsigned long caller), diff --git a/include/linux/iomap.h b/include/linux/iomap.h index da01226886eca4..2f13e34c2c0b0b 100644 --- a/include/linux/iomap.h +++ b/include/linux/iomap.h @@ -199,16 +199,6 @@ static inline struct iomap *iomap_iter_srcmap(struct iomap_iter *i) return &i->iomap; } -/* - * Main iomap iterator function. - */ -typedef loff_t (*iomap_actor_t)(struct inode *inode, loff_t pos, loff_t len, - void *data, struct iomap *iomap, struct iomap *srcmap); - -loff_t iomap_apply(struct inode *inode, loff_t pos, loff_t length, - unsigned flags, const struct iomap_ops *ops, void *data, - iomap_actor_t actor); - ssize_t iomap_file_buffered_write(struct kiocb *iocb, struct iov_iter *from, const struct iomap_ops *ops); int iomap_readpage(struct page *page, const struct iomap_ops *ops);
iomap_apply is unused now, so remove it. Signed-off-by: Christoph Hellwig <hch@lst.de> --- fs/iomap/Makefile | 1 - fs/iomap/apply.c | 99 ------------------------------------------- fs/iomap/trace.h | 40 ----------------- include/linux/iomap.h | 10 ----- 4 files changed, 150 deletions(-) delete mode 100644 fs/iomap/apply.c