linux-kernel - [PATCH] jfs: Add statx support

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Date:   Mon,  3 Jun 2019 20:42:27 +0530
From:   Anmol Sarma <me@...olsarma.in>
To:     unlisted-recipients:; (no To-header on input)
Cc:     Anmol Sarma <me@...olsarma.in>, Dave Kleikamp <shaggy@...nel.org>,
        jfs-discussion@...ts.sourceforge.net, linux-kernel@...r.kernel.org
Subject: [PATCH] jfs: Add statx support

From: Anmol Sarma <me@...olsarma.in>

Return inode creation time and stx_attributes flags

Signed-off-by: Anmol Sarma <me@...olsarma.in>
---
 fs/jfs/file.c      | 24 ++++++++++++++++++++++++
 fs/jfs/jfs_inode.h |  2 ++
 fs/jfs/namei.c     |  1 +
 fs/jfs/symlink.c   |  2 ++
 4 files changed, 29 insertions(+)

diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 36665fd37095..dedd27591836 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -23,6 +23,7 @@
 #include <linux/quotaops.h>
 #include "jfs_incore.h"
 #include "jfs_inode.h"
+#include "jfs_dinode.h"
 #include "jfs_dmap.h"
 #include "jfs_txnmgr.h"
 #include "jfs_xattr.h"
@@ -139,8 +140,31 @@ int jfs_setattr(struct dentry *dentry, struct iattr *iattr)
 	return rc;
 }
 
+int jfs_getattr(const struct path *path, struct kstat *stat, u32 request_mask,
+		unsigned int query_flags)
+{
+	struct inode *inode = d_inode(path->dentry);
+	struct jfs_inode_info *j_inode = JFS_IP(inode);
+	uint ji_flags = j_inode->mode2;
+
+	stat->result_mask |= STATX_BTIME;
+	stat->btime.tv_sec = j_inode->otime;
+	stat->btime.tv_nsec = 0;
+
+	if (ji_flags & JFS_APPEND_FL)
+		stat->attributes |= STATX_ATTR_APPEND;
+	if (ji_flags & JFS_IMMUTABLE_FL)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+
+	stat->attributes_mask |= STATX_ATTR_APPEND | STATX_ATTR_IMMUTABLE;
+
+	generic_fillattr(inode, stat);
+	return 0;
+}
+
 const struct inode_operations jfs_file_inode_operations = {
 	.listxattr	= jfs_listxattr,
+	.getattr	= jfs_getattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index 7b0b3a40788f..e8279a4cb7f7 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -39,6 +39,8 @@ extern struct dentry *jfs_fh_to_parent(struct super_block *sb, struct fid *fid,
 	int fh_len, int fh_type);
 extern void jfs_set_inode_flags(struct inode *);
 extern int jfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
+extern int jfs_getattr(const struct path *path, struct kstat *stat,
+		       u32 request_mask, unsigned int query_flags);
 extern int jfs_setattr(struct dentry *, struct iattr *);
 
 extern const struct address_space_operations jfs_aops;
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index fa719a1553b6..8070c25f7551 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1533,6 +1533,7 @@ const struct inode_operations jfs_dir_inode_operations = {
 	.mknod		= jfs_mknod,
 	.rename		= jfs_rename,
 	.listxattr	= jfs_listxattr,
+	.getattr	= jfs_getattr,
 	.setattr	= jfs_setattr,
 #ifdef CONFIG_JFS_POSIX_ACL
 	.get_acl	= jfs_get_acl,
diff --git a/fs/jfs/symlink.c b/fs/jfs/symlink.c
index 38320607993e..858e9de8ff74 100644
--- a/fs/jfs/symlink.c
+++ b/fs/jfs/symlink.c
@@ -23,12 +23,14 @@
 
 const struct inode_operations jfs_fast_symlink_inode_operations = {
 	.get_link	= simple_get_link,
+	.getattr	= jfs_getattr,
 	.setattr	= jfs_setattr,
 	.listxattr	= jfs_listxattr,
 };
 
 const struct inode_operations jfs_symlink_inode_operations = {
 	.get_link	= page_get_link,
+	.getattr	= jfs_getattr,
 	.setattr	= jfs_setattr,
 	.listxattr	= jfs_listxattr,
 };
-- 
2.17.1