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Btrfs: add statx support
Return enhanced file attributes from the btrfs, including: (1). inode creation time as stx_btime, and (2). Certain BTRFS_INODE_xxx flags are mapped to stx_attributes flags. Example output: [root@localhost ~]# cat t.sh touch t chattr +aic t ~/linux/samples/statx/test-statx t chattr -aic t touch t echo "========================================" ~/linux/samples/statx/test-statx t /bin/rm t [root@localhost ~]# ./t.sh statx(t) = 0 results=fff Size: 0 Blocks: 0 IO Block: 4096 regular file Device: 00:1c Inode: 63962 Links: 1 Access: (0644/-rw-r--r--) Uid: 0 Gid: 0 Access: 2017-05-11 16:03:13.999856591-0700 Modify: 2017-05-11 16:03:13.999856591-0700 Change: 2017-05-11 16:03:14.000856663-0700 Birth: 2017-05-11 16:03:13.999856591-0700 Attributes: 0000000000000034 (........ ........ ........ ........ ........ ........ ........ .-ai.c..) ======================================== statx(t) = 0 results=fff Size: 0 Blocks: 0 IO Block: 4096 regular file Device: 00:1c Inode: 63962 Links: 1 Access: (0644/-rw-r--r--) Uid: 0 Gid: 0 Access: 2017-05-11 16:03:14.006857097-0700 Modify: 2017-05-11 16:03:14.006857097-0700 Change: 2017-05-11 16:03:14.006857097-0700 Birth: 2017-05-11 16:03:13.999856591-0700 Attributes: 0000000000000000 (........ ........ ........ ........ ........ ........ ........ .---.-..) [root@localhost ~]# Reviewed-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Yonghong Song <yhs@fb.com> Reviewed-by: David Sterba <dsterba@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -9563,6 +9563,24 @@ static int btrfs_getattr(const struct path *path, struct kstat *stat,
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u64 delalloc_bytes;
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struct inode *inode = d_inode(path->dentry);
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u32 blocksize = inode->i_sb->s_blocksize;
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u32 bi_flags = BTRFS_I(inode)->flags;
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stat->result_mask |= STATX_BTIME;
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stat->btime.tv_sec = BTRFS_I(inode)->i_otime.tv_sec;
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stat->btime.tv_nsec = BTRFS_I(inode)->i_otime.tv_nsec;
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if (bi_flags & BTRFS_INODE_APPEND)
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stat->attributes |= STATX_ATTR_APPEND;
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if (bi_flags & BTRFS_INODE_COMPRESS)
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stat->attributes |= STATX_ATTR_COMPRESSED;
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if (bi_flags & BTRFS_INODE_IMMUTABLE)
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stat->attributes |= STATX_ATTR_IMMUTABLE;
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if (bi_flags & BTRFS_INODE_NODUMP)
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stat->attributes |= STATX_ATTR_NODUMP;
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stat->attributes_mask |= (STATX_ATTR_APPEND |
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STATX_ATTR_COMPRESSED |
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STATX_ATTR_IMMUTABLE |
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STATX_ATTR_NODUMP);
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generic_fillattr(inode, stat);
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stat->dev = BTRFS_I(inode)->root->anon_dev;
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