[PATCH 2/6] fs: rename and move block_page_mkwrite_return
From: Christoph Hellwig
Date: Tue Aug 01 2023 - 13:22:35 EST
block_page_mkwrite_return is neither block nor mkwrite specific, and
should not be under CONFIG_BLOCK. Move it to mm.h and rename it to
vmf_fs_error.
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Luis Chamberlain <mcgrof@xxxxxxxxxx>
Reviewed-by: Hannes Reinecke <hare@xxxxxxx>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@xxxxxxx>
---
fs/ext4/inode.c | 2 +-
fs/f2fs/file.c | 2 +-
fs/gfs2/file.c | 16 ++++++++--------
fs/iomap/buffered-io.c | 2 +-
fs/nilfs2/file.c | 2 +-
fs/udf/file.c | 2 +-
include/linux/buffer_head.h | 12 ------------
include/linux/mm.h | 18 ++++++++++++++++++
8 files changed, 31 insertions(+), 25 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 43775a6ca5054a..6eea0886b88553 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -6140,7 +6140,7 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
if (err == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry_alloc;
out_ret:
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
out:
filemap_invalidate_unlock_shared(mapping);
sb_end_pagefault(inode->i_sb);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 093039dee99206..9b3871fb9bfc44 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -159,7 +159,7 @@ static vm_fault_t f2fs_vm_page_mkwrite(struct vm_fault *vmf)
sb_end_pagefault(inode->i_sb);
err:
- return block_page_mkwrite_return(err);
+ return vmf_fs_error(err);
}
static const struct vm_operations_struct f2fs_file_vm_ops = {
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index 1bf3c4453516f2..897ef62d6d77a7 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -432,7 +432,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
gfs2_holder_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
err = gfs2_glock_nq(&gh);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_uninit;
}
@@ -474,7 +474,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
err = gfs2_rindex_update(sdp);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_unlock;
}
@@ -482,12 +482,12 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
ap.target = data_blocks + ind_blocks;
err = gfs2_quota_lock_check(ip, &ap);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_unlock;
}
err = gfs2_inplace_reserve(ip, &ap);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_quota_unlock;
}
@@ -500,7 +500,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
}
err = gfs2_trans_begin(sdp, rblocks, 0);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_trans_fail;
}
@@ -508,7 +508,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
if (gfs2_is_stuffed(ip)) {
err = gfs2_unstuff_dinode(ip);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_trans_end;
}
}
@@ -524,7 +524,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
err = gfs2_allocate_page_backing(page, length);
if (err)
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
out_page_locked:
if (ret != VM_FAULT_LOCKED)
@@ -558,7 +558,7 @@ static vm_fault_t gfs2_fault(struct vm_fault *vmf)
gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
err = gfs2_glock_nq(&gh);
if (err) {
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_uninit;
}
ret = filemap_fault(vmf);
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c
index adb92cdb24b009..0607790827b48a 100644
--- a/fs/iomap/buffered-io.c
+++ b/fs/iomap/buffered-io.c
@@ -1286,7 +1286,7 @@ vm_fault_t iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops)
return VM_FAULT_LOCKED;
out_unlock:
folio_unlock(folio);
- return block_page_mkwrite_return(ret);
+ return vmf_fs_error(ret);
}
EXPORT_SYMBOL_GPL(iomap_page_mkwrite);
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index a9eb3487efb2c2..740ce26d1e7657 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -108,7 +108,7 @@ static vm_fault_t nilfs_page_mkwrite(struct vm_fault *vmf)
wait_for_stable_page(page);
out:
sb_end_pagefault(inode->i_sb);
- return block_page_mkwrite_return(ret);
+ return vmf_fs_error(ret);
}
static const struct vm_operations_struct nilfs_file_vm_ops = {
diff --git a/fs/udf/file.c b/fs/udf/file.c
index 243840dc83addf..c0e2080e639eec 100644
--- a/fs/udf/file.c
+++ b/fs/udf/file.c
@@ -67,7 +67,7 @@ static vm_fault_t udf_page_mkwrite(struct vm_fault *vmf)
err = block_commit_write(page, 0, end);
if (err < 0) {
unlock_page(page);
- ret = block_page_mkwrite_return(err);
+ ret = vmf_fs_error(err);
goto out_unlock;
}
out_dirty:
diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h
index 6cb3e9af78c9ed..7002a9ff63a3da 100644
--- a/include/linux/buffer_head.h
+++ b/include/linux/buffer_head.h
@@ -291,18 +291,6 @@ int generic_cont_expand_simple(struct inode *inode, loff_t size);
int block_commit_write(struct page *page, unsigned from, unsigned to);
int block_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf,
get_block_t get_block);
-/* Convert errno to return value from ->page_mkwrite() call */
-static inline vm_fault_t block_page_mkwrite_return(int err)
-{
- if (err == 0)
- return VM_FAULT_LOCKED;
- if (err == -EFAULT || err == -EAGAIN)
- return VM_FAULT_NOPAGE;
- if (err == -ENOMEM)
- return VM_FAULT_OOM;
- /* -ENOSPC, -EDQUOT, -EIO ... */
- return VM_FAULT_SIGBUS;
-}
sector_t generic_block_bmap(struct address_space *, sector_t, get_block_t *);
int block_truncate_page(struct address_space *, loff_t, get_block_t *);
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 2dd73e4f3d8e3a..75777eae1c9c26 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -3386,6 +3386,24 @@ static inline vm_fault_t vmf_error(int err)
return VM_FAULT_SIGBUS;
}
+/*
+ * Convert errno to return value for ->page_mkwrite() calls.
+ *
+ * This should eventually be merged with vmf_error() above, but will need a
+ * careful audit of all vmf_error() callers.
+ */
+static inline vm_fault_t vmf_fs_error(int err)
+{
+ if (err == 0)
+ return VM_FAULT_LOCKED;
+ if (err == -EFAULT || err == -EAGAIN)
+ return VM_FAULT_NOPAGE;
+ if (err == -ENOMEM)
+ return VM_FAULT_OOM;
+ /* -ENOSPC, -EDQUOT, -EIO ... */
+ return VM_FAULT_SIGBUS;
+}
+
struct page *follow_page(struct vm_area_struct *vma, unsigned long address,
unsigned int foll_flags);
--
2.39.2