Return extended attributes from the Ext4 filesystem. This includes the following:
(1) The inode creation time (i_crtime) as i_btime.
(2) The inode i_generation as i_gen if not the root directory.
(3) The inode i_version as st_data_version if a file with I_VERSION set or a directory.
(4) FS_xxx_FL flags are returned as for ioctl(FS_IOC_GETFLAGS).
Signed-off-by: David Howells dhowells@redhat.com ---
fs/ext4/ext4.h | 2 ++ fs/ext4/file.c | 2 +- fs/ext4/inode.c | 32 +++++++++++++++++++++++++++++--- fs/ext4/namei.c | 2 ++ fs/ext4/super.c | 1 + fs/ext4/symlink.c | 2 ++ 6 files changed, 37 insertions(+), 4 deletions(-)
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index ab2594a..81806da 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1899,6 +1899,8 @@ 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 cb70f18..ae8654c 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -249,7 +249,7 @@ 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, #ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c77b0bd..eafc188 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4191,11 +4191,37 @@ err_out: int ext4_getattr(struct vfsmount *mnt, struct dentry *dentry, struct kstat *stat) { - struct inode *inode; - unsigned long delalloc_blocks; + struct inode *inode = dentry->d_inode; + struct ext4_inode_info *ei = EXT4_I(inode); + + stat->result_mask |= XSTAT_BTIME; + stat->btime.tv_sec = ei->i_crtime.tv_sec; + stat->btime.tv_nsec = ei->i_crtime.tv_nsec; + + if (inode->i_ino != EXT4_ROOT_INO) { + stat->result_mask |= XSTAT_GEN; + stat->gen = inode->i_generation; + } + if (S_ISDIR(inode->i_mode) || IS_I_VERSION(inode)) { + stat->result_mask |= XSTAT_VERSION; + stat->version = inode->i_version; + } + + ext4_get_inode_flags(ei); + stat->ioc_flags |= ei->i_flags & EXT4_FL_USER_VISIBLE; + stat->result_mask |= XSTAT_IOC_FLAGS;
- inode = dentry->d_inode; 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);
/* * We can't update i_blocks if the block allocation is delayed diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c index 349d7b3..6162387 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -2579,6 +2579,7 @@ const struct inode_operations ext4_dir_inode_operations = { .mknod = ext4_mknod, .rename = ext4_rename, .setattr = ext4_setattr, + .getattr = ext4_getattr, #ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, @@ -2591,6 +2592,7 @@ const struct inode_operations ext4_dir_inode_operations = {
const struct inode_operations ext4_special_inode_operations = { .setattr = ext4_setattr, + .getattr = ext4_getattr, #ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, diff --git a/fs/ext4/super.c b/fs/ext4/super.c index ceebaf8..2d395bf 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -3040,6 +3040,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent) if (sb->s_magic != EXT4_SUPER_MAGIC) goto cantfind_ext4; sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); + memcpy(sb->s_volume_id, es->s_uuid, sizeof(sb->s_volume_id));
/* Set defaults before we parse the mount options */ def_mount_opts = le32_to_cpu(es->s_default_mount_opts); diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c index ed9354a..d8fe7fb 100644 --- a/fs/ext4/symlink.c +++ b/fs/ext4/symlink.c @@ -35,6 +35,7 @@ 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, #ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, @@ -47,6 +48,7 @@ const struct inode_operations ext4_fast_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = ext4_follow_link, .setattr = ext4_setattr, + .getattr = ext4_getattr, #ifdef CONFIG_EXT4_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr,