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GET /api/1.2/patches/2220011/?format=api
{ "id": 2220011, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2220011/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260405195007.1306-5-DefendTheDisabled@gmail.com/", "project": { "id": 8, "url": "http://patchwork.ozlabs.org/api/1.2/projects/8/?format=api", "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": "<20260405195007.1306-5-DefendTheDisabled@gmail.com>", "list_archive_url": null, "date": "2026-04-05T19:50:00", "name": "[4/6] ext4: add dedicated ptime field alongside i_crtime", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "68e5919f5a4a84fd6e85b6059d12508e8c938a22", "submitter": { "id": 93064, "url": "http://patchwork.ozlabs.org/api/1.2/people/93064/?format=api", "name": "Sean Smith", "email": "defendthedisabled@gmail.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-ext4/patch/20260405195007.1306-5-DefendTheDisabled@gmail.com/mbox/", "series": [ { "id": 498804, "url": "http://patchwork.ozlabs.org/api/1.2/series/498804/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-ext4/list/?series=498804", "date": "2026-04-05T19:49:56", "name": "provenance_time (ptime): a new settable timestamp for cross-filesystem provenance", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/498804/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2220011/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2220011/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <SRS0=ls9y=CE=vger.kernel.org=linux-ext4+bounces-15646-patchwork-incoming=ozlabs.org@ozlabs.org>", "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\tdkim=pass (2048-bit key;\n unprotected) header.d=gmail.com header.i=@gmail.com header.a=rsa-sha256\n header.s=20251104 header.b=MFGd3Z38;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=ozlabs.org\n (client-ip=150.107.74.76; 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Total: 8 bytes in the extended inode\narea. i_crtime remains untouched as immutable birth time.\n\nThis is a native-ptime implementation: ptime and btime are separate\nfields. On 256-byte inodes (modern default), both fit easily. On\n128-byte inodes, ptime is silently unavailable (same graceful\ndegradation as i_crtime via EXT4_FITS_IN_INODE).\n\nUses existing EXT4_EINODE_GET_XTIME/SET_XTIME macros for read/write.\nRename-over: when a file with ptime=0 replaces a file with ptime set,\ninherit target ptime (same zero-sentinel logic as Btrfs).\n\nSigned-off-by: Sean Smith <DefendTheDisabled@gmail.com>\n---\n fs/ext4/ext4.h | 3 +++\n fs/ext4/inode.c | 14 ++++++++++++++\n fs/ext4/namei.c | 13 +++++++++++++\n 3 files changed, 30 insertions(+)", "diff": "diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h\nindex f1c476303..5c2812637 100644\n--- a/fs/ext4/ext4.h\n+++ b/fs/ext4/ext4.h\n@@ -860,6 +860,8 @@ struct ext4_inode {\n \t__le32 i_crtime_extra; /* extra FileCreationtime (nsec << 2 | epoch) */\n \t__le32 i_version_hi;\t/* high 32 bits for 64-bit version */\n \t__le32\ti_projid;\t/* Project ID */\n+\t__le32\ti_ptime;\t\t/* Provenance time */\n+\t__le32\ti_ptime_extra;\t/* extra Provenance time (nsec << 2 | epoch) */\n };\n \n #define EXT4_EPOCH_BITS 2\n@@ -1136,6 +1138,7 @@ struct ext4_inode_info {\n \t * struct timespec64 i_{a,c,m}time in the generic inode.\n \t */\n \tstruct timespec64 i_crtime;\n+\tstruct timespec64 i_ptime;\n \n \t/* mballoc */\n \tatomic_t i_prealloc_active;\ndiff --git a/fs/ext4/inode.c b/fs/ext4/inode.c\nindex 625cfbf61..15b6b6dc6 100644\n--- a/fs/ext4/inode.c\n+++ b/fs/ext4/inode.c\n@@ -4753,6 +4753,7 @@ static int ext4_fill_raw_inode(struct inode *inode, struct ext4_inode *raw_inode\n \tEXT4_INODE_SET_MTIME(inode, raw_inode);\n \tEXT4_INODE_SET_ATIME(inode, raw_inode);\n \tEXT4_EINODE_SET_XTIME(i_crtime, ei, raw_inode);\n+\tEXT4_EINODE_SET_XTIME(i_ptime, ei, raw_inode);\n \n \traw_inode->i_dtime = cpu_to_le32(ei->i_dtime);\n \traw_inode->i_flags = cpu_to_le32(ei->i_flags & 0xFFFFFFFF);\n@@ -5409,6 +5410,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,\n \tEXT4_INODE_GET_ATIME(inode, raw_inode);\n \tEXT4_INODE_GET_MTIME(inode, raw_inode);\n \tEXT4_EINODE_GET_XTIME(i_crtime, ei, raw_inode);\n+\tEXT4_EINODE_GET_XTIME(i_ptime, ei, raw_inode);\n \n \tif (likely(!test_opt2(inode->i_sb, HURD_COMPAT))) {\n \t\tu64 ivers = le32_to_cpu(raw_inode->i_disk_version);\n@@ -6061,6 +6063,9 @@ int ext4_setattr(struct mnt_idmap *idmap, struct dentry *dentry,\n \tif (!error) {\n \t\tif (inc_ivers)\n \t\t\tinode_inc_iversion(inode);\n+\t\tif (attr->ia_valid & ATTR_PTIME)\n+\t\t\tEXT4_I(inode)->i_ptime = attr->ia_ptime;\n+\n \t\tsetattr_copy(idmap, inode, attr);\n \t\tmark_inode_dirty(inode);\n \t}\n@@ -6114,6 +6119,15 @@ int ext4_getattr(struct mnt_idmap *idmap, const struct path *path,\n \t\tstat->btime.tv_nsec = ei->i_crtime.tv_nsec;\n \t}\n \n+\t/* Report ptime from dedicated field, not crtime */\n+\tif ((request_mask & STATX_PTIME) &&\n+\t EXT4_FITS_IN_INODE(raw_inode, ei, i_ptime) &&\n+\t (ei->i_ptime.tv_sec || ei->i_ptime.tv_nsec)) {\n+\t\tstat->result_mask |= STATX_PTIME;\n+\t\tstat->ptime.tv_sec = ei->i_ptime.tv_sec;\n+\t\tstat->ptime.tv_nsec = ei->i_ptime.tv_nsec;\n+\t}\n+\n \t/*\n \t * Return the DIO alignment restrictions if requested. We only return\n \t * this information when requested, since on encrypted files it might\ndiff --git a/fs/ext4/namei.c b/fs/ext4/namei.c\nindex c4b5e252a..1bfe4df24 100644\n--- a/fs/ext4/namei.c\n+++ b/fs/ext4/namei.c\n@@ -3942,6 +3942,19 @@ static int ext4_rename(struct mnt_idmap *idmap, struct inode *old_dir,\n \t * rename.\n \t */\n \tinode_set_ctime_current(old.inode);\n+\n+\t/* ptime rename-over: preserve ptime across atomic saves */\n+\tif (new.inode && S_ISREG(old.inode->i_mode) &&\n+\t S_ISREG(new.inode->i_mode) && old.inode->i_nlink == 1 &&\n+\t !(flags & RENAME_WHITEOUT)) {\n+\t\tstruct ext4_inode_info *old_ei = EXT4_I(old.inode);\n+\t\tstruct ext4_inode_info *new_ei = EXT4_I(new.inode);\n+\n+\t\tif (!old_ei->i_ptime.tv_sec && !old_ei->i_ptime.tv_nsec &&\n+\t\t (new_ei->i_ptime.tv_sec || new_ei->i_ptime.tv_nsec))\n+\t\t\told_ei->i_ptime = new_ei->i_ptime;\n+\t}\n+\n \tretval = ext4_mark_inode_dirty(handle, old.inode);\n \tif (unlikely(retval))\n \t\tgoto end_rename;\n", "prefixes": [ "4/6" ] }