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Registered in England and Wales under Company Registration No. 3798903 Subject: [PATCH 2/4] statx: Ext4: Return enhanced file attributes [ver #3] From: David Howells To: linux-fsdevel@vger.kernel.org Cc: dhowells@redhat.com, linux-api@vger.kernel.org, linux-kernel@vger.kernel.org Date: Wed, 23 Nov 2016 00:55:59 +0000 Message-ID: <147986255921.19139.6012507332848890196.stgit@warthog.procyon.org.uk> In-Reply-To: <147986254484.19139.8038609825799670925.stgit@warthog.procyon.org.uk> References: <147986254484.19139.8038609825799670925.stgit@warthog.procyon.org.uk> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Wed, 23 Nov 2016 00:56:01 +0000 (UTC) Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Return enhanced file attributes from the Ext4 filesystem. This includes the following: (1) The inode creation time (i_crtime) as stx_btime, setting STATX_BTIME. (2) Certain FS_xxx_FL flags are mapped to stx_attribute 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@andromeda ~]# touch foo [root@andromeda ~]# chattr +ai foo [root@andromeda ~]# /tmp/test-statx foo statx(foo) = 0 results=fff Size: 0 Blocks: 0 IO Block: 4096 regular file Device: 08:12 Inode: 2101950 Links: 1 Access: (0644/-rw-r--r--) Uid: 0 Gid: 0 Access: 2016-02-11 17:08:29.031795451+0000 Modify: 2016-02-11 17:08:29.031795451+0000 Change: 2016-02-11 17:11:11.987790114+0000 Birth: 2016-02-11 17:08:29.031795451+0000 Attributes: 0000000000000030 (-------- -------- -------- -------- -------- -------- -------- --ai----) IO-blocksize: blksize=4096 Signed-off-by: David Howells Reviewed-by: Andreas Dilger --- fs/ext4/ext4.h | 2 ++ fs/ext4/file.c | 2 +- fs/ext4/inode.c | 36 +++++++++++++++++++++++++++++++++--- fs/ext4/namei.c | 2 ++ fs/ext4/symlink.c | 2 ++ 5 files changed, 40 insertions(+), 4 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 282a51b07c57..f65e4a560c4c 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2485,6 +2485,8 @@ 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 2a822d30e73f..20bab4b0d6fc 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -705,7 +705,7 @@ 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, .listxattr = ext4_listxattr, .get_acl = ext4_get_acl, .set_acl = ext4_set_acl, diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9c064727ed62..fd7d5f918cc3 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5229,11 +5229,41 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) 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); + unsigned int flags; + + 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; + } + + ext4_get_inode_flags(ei); + flags = ei->i_flags & EXT4_FL_USER_VISIBLE; + if (flags & EXT4_APPEND_FL) + stat->attributes |= STATX_ATTR_APPEND; + if (flags & EXT4_COMPR_FL) + stat->attributes |= STATX_ATTR_COMPRESSED; + if (flags & EXT4_ENCRYPT_FL) + stat->attributes |= STATX_ATTR_ENCRYPTED; + if (flags & EXT4_IMMUTABLE_FL) + stat->attributes |= STATX_ATTR_IMMUTABLE; + if (flags & EXT4_NODUMP_FL) + stat->attributes |= STATX_ATTR_NODUMP; - 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 104f8bfba718..e115281fb8c5 100644 --- a/fs/ext4/namei.c +++ b/fs/ext4/namei.c @@ -3882,6 +3882,7 @@ const struct inode_operations ext4_dir_inode_operations = { .tmpfile = ext4_tmpfile, .rename = ext4_rename2, .setattr = ext4_setattr, + .getattr = ext4_getattr, .listxattr = ext4_listxattr, .get_acl = ext4_get_acl, .set_acl = ext4_set_acl, @@ -3890,6 +3891,7 @@ const struct inode_operations ext4_dir_inode_operations = { const struct inode_operations ext4_special_inode_operations = { .setattr = ext4_setattr, + .getattr = ext4_getattr, .listxattr = ext4_listxattr, .get_acl = ext4_get_acl, .set_acl = ext4_set_acl, diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c index 557b3b0d668c..209b833633e2 100644 --- a/fs/ext4/symlink.c +++ b/fs/ext4/symlink.c @@ -93,6 +93,7 @@ const struct inode_operations ext4_symlink_inode_operations = { .readlink = generic_readlink, .get_link = page_get_link, .setattr = ext4_setattr, + .getattr = ext4_getattr, .listxattr = ext4_listxattr, }; @@ -100,5 +101,6 @@ const struct inode_operations ext4_fast_symlink_inode_operations = { .readlink = generic_readlink, .get_link = simple_get_link, .setattr = ext4_setattr, + .getattr = ext4_getattr, .listxattr = ext4_listxattr, };