nfsd already support btime by:
commit e377a3e698fb ("nfsd: Add support for the birth time attribute")
This patch enable nfs to report btime in nfs_getattr.
If underlying filesystem supports "btime" timestamp,
statx will report btime for STATX_BTIME.
Signed-off-by: Chen Hanxiao <chenhx.fnst@xxxxxxxxxxx>
---
1.1:
minor fix
fs/nfs/inode.c | 14 +++++++++++++-
fs/nfs/nfs4proc.c | 3 +++
fs/nfs/nfs4xdr.c | 23 +++++++++++++++++++++++
include/linux/nfs_fs.h | 2 ++
include/linux/nfs_xdr.h | 2 ++
5 files changed, 43 insertions(+), 1 deletion(-)
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 8172dd4135a1..36e322b993f8 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -835,6 +835,7 @@ int nfs_getattr(struct mnt_idmap *idmap, const struct path *path,
{
struct inode *inode = d_inode(path->dentry);
struct nfs_server *server = NFS_SERVER(inode);
+ struct nfs_inode *nfsi = NFS_I(inode);
unsigned long cache_validity;
int err = 0;
bool force_sync = query_flags & AT_STATX_FORCE_SYNC;
@@ -845,7 +846,7 @@ int nfs_getattr(struct mnt_idmap *idmap, const struct path *path,
request_mask &= STATX_TYPE | STATX_MODE | STATX_NLINK | STATX_UID |
STATX_GID | STATX_ATIME | STATX_MTIME | STATX_CTIME |
- STATX_INO | STATX_SIZE | STATX_BLOCKS |
+ STATX_INO | STATX_SIZE | STATX_BLOCKS | STATX_BTIME |
STATX_CHANGE_COOKIE;
if ((query_flags & AT_STATX_DONT_SYNC) && !force_sync) {
@@ -911,6 +912,10 @@ int nfs_getattr(struct mnt_idmap *idmap, const struct path *path,
out_no_revalidate:
/* Only return attributes that were revalidated. */
stat->result_mask = nfs_get_valid_attrmask(inode) | request_mask;
+ if (nfsi->btime.tv_sec == 0 && nfsi->btime.tv_nsec == 0)
+ stat->result_mask &= ~STATX_BTIME;
+ else
+ stat->btime = nfsi->btime;
generic_fillattr(&nop_mnt_idmap, inode, stat);
stat->ino = nfs_compat_user_ino64(NFS_FILEID(inode));
@@ -2189,6 +2194,12 @@ static int nfs_update_inode(struct inode *inode, struct nfs_fattr *fattr)
nfsi->cache_validity |=
save_cache_validity & NFS_INO_INVALID_MTIME;
+ if (fattr->valid & NFS_ATTR_FATTR_BTIME) {
+ nfsi->btime = fattr->btime;
+ } else if (fattr_supported & NFS_ATTR_FATTR_BTIME)
+ nfsi->cache_validity |=
+ save_cache_validity & NFS_INO_INVALID_BTIME;
+
if (fattr->valid & NFS_ATTR_FATTR_CTIME)
inode->i_ctime = fattr->ctime;
else if (fattr_supported & NFS_ATTR_FATTR_CTIME)
@@ -2332,6 +2343,7 @@ struct inode *nfs_alloc_inode(struct super_block *sb)
#endif /* CONFIG_NFS_V4 */
#ifdef CONFIG_NFS_V4_2
nfsi->xattr_cache = NULL;
+ memset(&nfsi->btime, 0, sizeof(nfsi->btime));
#endif
nfs_netfs_inode_init(nfsi);
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index e1a886b58354..c4717ae4b1b3 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -211,6 +211,7 @@ const u32 nfs4_fattr_bitmap[3] = {
| FATTR4_WORD1_TIME_ACCESS
| FATTR4_WORD1_TIME_METADATA
| FATTR4_WORD1_TIME_MODIFY
+ | FATTR4_WORD1_TIME_CREATE
| FATTR4_WORD1_MOUNTED_ON_FILEID,
#ifdef CONFIG_NFS_V4_SECURITY_LABEL
FATTR4_WORD2_SECURITY_LABEL
@@ -3909,6 +3910,8 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
server->fattr_valid &= ~NFS_ATTR_FATTR_CTIME;
if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY))
server->fattr_valid &= ~NFS_ATTR_FATTR_MTIME;
+ if (!(res.attr_bitmask[1] & FATTR4_WORD1_TIME_CREATE))
+ server->fattr_valid &= ~NFS_ATTR_FATTR_BTIME;
memcpy(server->attr_bitmask_nl, res.attr_bitmask,
sizeof(server->attr_bitmask));
server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index deec76cf5afe..df3699eb29e8 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -4171,6 +4171,24 @@ static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, str
return status;
}
+static int decode_attr_time_create(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
+{
+ int status = 0;
+
+ time->tv_sec = 0;
+ time->tv_nsec = 0;
+ if (unlikely(bitmap[1] & (FATTR4_WORD1_TIME_CREATE - 1U)))
+ return -EIO;
+ if (likely(bitmap[1] & FATTR4_WORD1_TIME_CREATE)) {
+ status = decode_attr_time(xdr, time);
+ if (status == 0)
+ status = NFS_ATTR_FATTR_BTIME;
+ bitmap[1] &= ~FATTR4_WORD1_TIME_CREATE;
+ }
+ dprintk("%s: btime=%lld\n", __func__, time->tv_sec);
+ return status;
+}
+
static int decode_attr_time_metadata(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec64 *time)
{
int status = 0;
@@ -4730,6 +4748,11 @@ static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
goto xdr_error;
fattr->valid |= status;
+ status = decode_attr_time_create(xdr, bitmap, &fattr->btime);
+ if (status < 0)
+ goto xdr_error;
+ fattr->valid |= status;
+
status = decode_attr_time_metadata(xdr, bitmap, &fattr->ctime);
if (status < 0)
goto xdr_error;
diff --git a/include/linux/nfs_fs.h b/include/linux/nfs_fs.h
index 279262057a92..ba8c1872494d 100644
--- a/include/linux/nfs_fs.h
+++ b/include/linux/nfs_fs.h
@@ -159,6 +159,7 @@ struct nfs_inode {
unsigned long read_cache_jiffies;
unsigned long attrtimeo;
unsigned long attrtimeo_timestamp;
+ struct timespec64 btime;
unsigned long attr_gencount;
@@ -298,6 +299,7 @@ struct nfs4_copy_state {
#define NFS_INO_INVALID_XATTR BIT(15) /* xattrs are invalid */
#define NFS_INO_INVALID_NLINK BIT(16) /* cached nlinks is invalid */
#define NFS_INO_INVALID_MODE BIT(17) /* cached mode is invalid */
+#define NFS_INO_INVALID_BTIME BIT(18) /* cached btime is invalid */
#define NFS_INO_INVALID_ATTR (NFS_INO_INVALID_CHANGE \
| NFS_INO_INVALID_CTIME \
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 12bbb5c63664..8e90c5bbf5e4 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -67,6 +67,7 @@ struct nfs_fattr {
struct timespec64 atime;
struct timespec64 mtime;
struct timespec64 ctime;
+ struct timespec64 btime;
__u64 change_attr; /* NFSv4 change attribute */
__u64 pre_change_attr;/* pre-op NFSv4 change attribute */
__u64 pre_size; /* pre_op_attr.size */
@@ -106,6 +107,7 @@ struct nfs_fattr {
#define NFS_ATTR_FATTR_OWNER_NAME (1U << 23)
#define NFS_ATTR_FATTR_GROUP_NAME (1U << 24)
#define NFS_ATTR_FATTR_V4_SECURITY_LABEL (1U << 25)
+#define NFS_ATTR_FATTR_BTIME (1U << 26)
#define NFS_ATTR_FATTR (NFS_ATTR_FATTR_TYPE \
| NFS_ATTR_FATTR_MODE \
--
2.39.1
