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Date: Fri, 20 Nov 2015 14:55:22 +0000
From: David Howells <dhowells@...hat.com>
To: arnd@...db.de
Cc: linux-afs@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-cifs@...r.kernel.org, samba-technical@...ts.samba.org,
linux-kernel@...r.kernel.org, dhowells@...hat.com,
linux-fsdevel@...r.kernel.org, linux-ext4@...r.kernel.org
Subject: [PATCH 05/12] statx: Ext4: Return enhanced file attributes
Return enhanced file attributes from the Ext4 filesystem. This includes
the following:
(1) The inode creation time (i_crtime) as i_btime, setting STATX_BTIME.
(2) The inode i_version as st_version if a file with I_VERSION set or a
directory, setting STATX_VERSION.
(3) FS_xxx_FL flags are returned as for ioctl(FS_IOC_GETFLAGS), setting
STATX_IOC_FLAGS.
This requires that all ext4 inodes have a getattr call, not just some of
them, so to this end, split the ext4_getattr() function and only call part
of it where appropriate.
Example output:
[root@...romeda ~]# ./samples/statx/test-statx /usr
statx(/usr) = 0
results=37ef
Size: 4096 Blocks: 16 IO Block: 4096 directory
Device: 08:02 Inode: 1572865 Links: 14
Access: (0755/drwxr-xr-x) Uid: 0 Gid: 0
Access: 2015-11-03 16:12:30.000000000+0000
Modify: 2013-10-18 15:29:18.000000000+0100
Change: 2013-10-18 15:29:18.000000000+0100
Data version: 2fh
Inode flags: 00000000 (-------- -------- -------- --------)
IO-blocksize: blksize=4096
Signed-off-by: David Howells <dhowells@...hat.com>
---
fs/ext4/ext4.h | 2 ++
fs/ext4/file.c | 2 +-
fs/ext4/inode.c | 31 ++++++++++++++++++++++++++++---
fs/ext4/namei.c | 2 ++
fs/ext4/symlink.c | 2 ++
5 files changed, 35 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 31efcd78bf51..606f94ba455c 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -2302,6 +2302,8 @@ extern int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat);
extern void ext4_evict_inode(struct inode *);
extern void ext4_clear_inode(struct inode *);
+extern int ext4_file_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat);
extern int ext4_sync_inode(handle_t *, struct inode *);
extern void ext4_dirty_inode(struct inode *, int);
extern int ext4_change_inode_journal_flag(struct inode *, int);
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 113837e7ba98..3b6fe04b199e 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -712,7 +712,7 @@ const struct file_operations ext4_file_operations = {
const struct inode_operations ext4_file_inode_operations = {
.setattr = ext4_setattr,
- .getattr = ext4_getattr,
+ .getattr = ext4_file_getattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 612fbcf76b5c..c86ff971d8bc 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4818,11 +4818,36 @@ err_out:
int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry,
struct kstat *stat)
{
- struct inode *inode;
- unsigned long long delalloc_blocks;
+ struct inode *inode = d_inode(dentry);
+ struct ext4_inode *raw_inode;
+ struct ext4_inode_info *ei = EXT4_I(inode);
+
+ if (EXT4_FITS_IN_INODE(raw_inode, ei, i_crtime)) {
+ stat->result_mask |= STATX_BTIME;
+ stat->btime.tv_sec = ei->i_crtime.tv_sec;
+ stat->btime.tv_nsec = ei->i_crtime.tv_nsec;
+ }
+
+ if (S_ISDIR(inode->i_mode) || IS_I_VERSION(inode)) {
+ stat->result_mask |= STATX_VERSION;
+ stat->version = inode->i_version;
+ }
+
+ ext4_get_inode_flags(ei);
+ stat->ioc_flags |= ei->i_flags & EXT4_FL_USER_VISIBLE;
+ stat->result_mask |= STATX_IOC_FLAGS;
- inode = d_inode(dentry);
generic_fillattr(inode, stat);
+ return 0;
+}
+
+int ext4_file_getattr(struct vfsmount *mnt, struct dentry *dentry,
+ struct kstat *stat)
+{
+ struct inode *inode = dentry->d_inode;
+ u64 delalloc_blocks;
+
+ ext4_getattr(mnt, dentry, stat);
/*
* If there is inline data in the inode, the inode will normally not
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 9f61e7679a6d..1f18e61c4f8a 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3848,6 +3848,7 @@ const struct inode_operations ext4_dir_inode_operations = {
.tmpfile = ext4_tmpfile,
.rename2 = ext4_rename2,
.setattr = ext4_setattr,
+ .getattr = ext4_getattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
@@ -3859,6 +3860,7 @@ const struct inode_operations ext4_dir_inode_operations = {
const struct inode_operations ext4_special_inode_operations = {
.setattr = ext4_setattr,
+ .getattr = ext4_getattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index c677f2c1044b..89c9d27c6319 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -106,6 +106,7 @@ const struct inode_operations ext4_symlink_inode_operations = {
.follow_link = page_follow_link_light,
.put_link = page_put_link,
.setattr = ext4_setattr,
+ .getattr = ext4_getattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
@@ -116,6 +117,7 @@ const struct inode_operations ext4_fast_symlink_inode_operations = {
.readlink = generic_readlink,
.follow_link = simple_follow_link,
.setattr = ext4_setattr,
+ .getattr = ext4_getattr,
.setxattr = generic_setxattr,
.getxattr = generic_getxattr,
.listxattr = ext4_listxattr,
--
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