{"id":2215730,"url":"http://patchwork.ozlabs.org/api/patches/2215730/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260325072850.3997161-2-yi.zhang@huaweicloud.com/","project":{"id":8,"url":"http://patchwork.ozlabs.org/api/projects/8/?format=json","name":"Linux ext4 filesystem development","link_name":"linux-ext4","list_id":"linux-ext4.vger.kernel.org","list_email":"linux-ext4@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null,"list_archive_url":"","list_archive_url_format":"","commit_url_format":""},"msgid":"<20260325072850.3997161-2-yi.zhang@huaweicloud.com>","list_archive_url":null,"date":"2026-03-25T07:28:40","name":"[v2,01/10] ext4: add did_zero output parameter to ext4_block_zero_page_range()","commit_ref":null,"pull_url":null,"state":"superseded","archived":false,"hash":"8fbe41faa41586aa97438eadd2d65cc2d965b597","submitter":{"id":85428,"url":"http://patchwork.ozlabs.org/api/people/85428/?format=json","name":"Zhang Yi","email":"yi.zhang@huaweicloud.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-ext4/patch/20260325072850.3997161-2-yi.zhang@huaweicloud.com/mbox/","series":[{"id":497391,"url":"http://patchwork.ozlabs.org/api/series/497391/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-ext4/list/?series=497391","date":"2026-03-25T07:28:44","name":"ext4: refactor partial block zero-out for iomap conversion","version":2,"mbox":"http://patchwork.ozlabs.org/series/497391/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2215730/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2215730/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-ext4@vger.kernel.org"],"Delivered-To":["patchwork-incoming@legolas.ozlabs.org","patchwork-incoming@ozlabs.org"],"Authentication-Results":["legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=2404:9400:2221:ea00::3; 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The parameter reports whether a\npartial block was zeroed out, which is needed for the upcoming iomap\nbuffered I/O conversion.\n\nSigned-off-by: Zhang Yi \nReviewed-by: Jan Kara \n---\n fs/ext4/inode.c | 23 ++++++++++++++---------\n 1 file changed, 14 insertions(+), 9 deletions(-)","diff":"diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c\nindex af6d1759c8de..1c9474d5d11d 100644\n--- a/fs/ext4/inode.c\n+++ b/fs/ext4/inode.c\n@@ -4003,7 +4003,8 @@ void ext4_set_aops(struct inode *inode)\n * racing writeback can come later and flush the stale pagecache to disk.\n */\n static int __ext4_block_zero_page_range(handle_t *handle,\n-\t\tstruct address_space *mapping, loff_t from, loff_t length)\n+\t\tstruct address_space *mapping, loff_t from, loff_t length,\n+\t\tbool *did_zero)\n {\n \tunsigned int offset, blocksize, pos;\n \text4_lblk_t iblock;\n@@ -4091,6 +4092,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,\n \t\t\terr = ext4_jbd2_inode_add_write(handle, inode, from,\n \t\t\t\t\tlength);\n \t}\n+\tif (!err && did_zero)\n+\t\t*did_zero = true;\n \n unlock:\n \tfolio_unlock(folio);\n@@ -4106,7 +4109,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,\n * that corresponds to 'from'\n */\n static int ext4_block_zero_page_range(handle_t *handle,\n-\t\tstruct address_space *mapping, loff_t from, loff_t length)\n+\t\tstruct address_space *mapping, loff_t from, loff_t length,\n+\t\tbool *did_zero)\n {\n \tstruct inode *inode = mapping->host;\n \tunsigned blocksize = inode->i_sb->s_blocksize;\n@@ -4120,10 +4124,11 @@ static int ext4_block_zero_page_range(handle_t *handle,\n \t\tlength = max;\n \n \tif (IS_DAX(inode)) {\n-\t\treturn dax_zero_range(inode, from, length, NULL,\n+\t\treturn dax_zero_range(inode, from, length, did_zero,\n \t\t\t\t &ext4_iomap_ops);\n \t}\n-\treturn __ext4_block_zero_page_range(handle, mapping, from, length);\n+\treturn __ext4_block_zero_page_range(handle, mapping, from, length,\n+\t\t\t\t\t did_zero);\n }\n \n /*\n@@ -4146,7 +4151,7 @@ static int ext4_block_truncate_page(handle_t *handle,\n \tblocksize = i_blocksize(inode);\n \tlength = blocksize - (from & (blocksize - 1));\n \n-\treturn ext4_block_zero_page_range(handle, mapping, from, length);\n+\treturn ext4_block_zero_page_range(handle, mapping, from, length, NULL);\n }\n \n int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,\n@@ -4169,13 +4174,13 @@ int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,\n \tif (start == end &&\n \t (partial_start || (partial_end != sb->s_blocksize - 1))) {\n \t\terr = ext4_block_zero_page_range(handle, mapping,\n-\t\t\t\t\t\t lstart, length);\n+\t\t\t\t\t\t lstart, length, NULL);\n \t\treturn err;\n \t}\n \t/* Handle partial zero out on the start of the range */\n \tif (partial_start) {\n-\t\terr = ext4_block_zero_page_range(handle, mapping,\n-\t\t\t\t\t\t lstart, sb->s_blocksize);\n+\t\terr = ext4_block_zero_page_range(handle, mapping, lstart,\n+\t\t\t\t\t\t sb->s_blocksize, NULL);\n \t\tif (err)\n \t\t\treturn err;\n \t}\n@@ -4183,7 +4188,7 @@ int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode,\n \tif (partial_end != sb->s_blocksize - 1)\n \t\terr = ext4_block_zero_page_range(handle, mapping,\n \t\t\t\t\t\t byte_end - partial_end,\n-\t\t\t\t\t\t partial_end + 1);\n+\t\t\t\t\t\t partial_end + 1, NULL);\n \treturn err;\n }\n \n","prefixes":["v2","01/10"]}