search for: btrfs_header

...t;fd, + (unsigned long long)buf->dev_bytenr); + } free(result); return 1; } @@ -165,6 +181,31 @@ static int verify_parent_transid(struct extent_io_tree *io_tree, (unsigned long long)eb->start, (unsigned long long)parent_transid, (unsigned long long)btrfs_header_generation(eb)); + fprintf(stderr, "dd if=(fd %i) bs=1c skip=%llu count=8 | od -t x1:\n%02x %02x %02x %02x %02x %02x %02x %02x\n", + eb->fd, + (unsigned long long)eb->dev_bytenr + + offsetof (struct btrfs_header, generation), + (__u8)eb->data[offsetof (struct btrfs_header, ge...

...eby decrease the chances of fragment. Cons: 1 Acquire more space for metadata and not suit for user data, obviously. 2 Conflict with SSD wearing leveling optimizing, obviously. Implementation Notes: struct btrfs_fs_info has a field cater_factor to store the multiples from mount option, and struct btrfs_header has a u8 member, it''s left-hand 4 bits to record this block''s location index and right-hand 4 bits for multiples, such a combination indicates how many continuous blocks form a caterpillar and which slot this tree block resides in the caterpillar. When cow a block that is already...

..._M" + +#define BTRFS_CSUM_SIZE 32 +#define BTRFS_FSID_SIZE 16 + +/* + * the super block basically lists the main trees of the FS + * it currently lacks any block count etc etc + */ +struct btrfs_super_block { + __u8 csum[BTRFS_CSUM_SIZE]; + /* the first 4 fields must match struct btrfs_header */ + __u8 fsid[BTRFS_FSID_SIZE]; /* FS specific uuid */ + __le64 bytenr; /* this block number */ + __le64 flags; + + /* allowed to be different from the btrfs_header from here own down */ + __le64 magic; + __le64 generation; + __le64 root; +...

Hi, The following patches add support for ext4 and btrfs to PV-GRUB. These patches are taken nearly verbatim from those provided by Fedora and Gentoo. We''ve been using these patches for the PV-GRUB images available in EC2 for some time now with no problems. Changes from v1: - Makefile has been changed to check the exit code from patch - The btrfs patch has been rebased to apply

...ct btrfs_dir_item { + struct btrfs_disk_key location; + __le64 transid; + __le16 data_len; + __le16 name_len; + u8 type; +} __attribute__ ((__packed__)); + struct btrfs_super_block { unsigned char csum[BTRFS_CSUM_SIZE]; /* the first 3 fields must match struct btrfs_header */ @@ -19,4 +56,72 @@ struct btrfs_super_block { u64 magic; } __attribute__ ((__packed__)); + +#define BTRFS_IOCTL_MAGIC 0x94 +#define BTRFS_VOL_NAME_MAX 255 +#define BTRFS_PATH_NAME_MAX 4087 + +struct btrfs_ioctl_vol_args { + __s64 fd; + char name[BTRFS_PATH_NAME_MAX + 1]; +}; + +struct btrfs...

From: Anand Jain <anand.jain@oracle.com> (This patch is for the review/test not yet for the integration). Here is an implementation of the feature to add label to the subvolume and snapshots. Which would help sysadmin to better manager the subvol and snapshots. This can be done in two ways, one - using attr which is user land only changes but drawback is able to change the label

This series adds an initial implementation for scrub. It works quite straightforward. The usermode issues an ioctl for each device in the fs. For each device, it enumerates the allocated device chunks. For each chunk, the contained extents are enumerated and the data checksums fetched. The extents are read sequentially and the checksums verified. If an error occurs (checksum or EIO), a good copy

...int level; struct btrfs_root *new_root; + struct btrfs_disk_key disk_key; new_root = kmalloc(sizeof(*new_root), GFP_NOFS); if (!new_root) @@ -98,8 +99,12 @@ int btrfs_copy_root(struct btrfs_trans_h WARN_ON(root->ref_cows && trans->transid != root->last_trans); level = btrfs_header_level(buf); - cow = btrfs_alloc_free_block(trans, new_root, buf->len, 0, - new_root_objectid, trans->transid, + if (level == 0) + btrfs_item_key(buf, &disk_key, 0); + else + btrfs_node_key(buf, &disk_key, 0); + cow = btrfs_alloc_free_block(trans, new_root, buf->len, +...

Changes v1-v2: - Remove restriction that BTRFS_IOC_GET_DEVICE_STATS is a privileged operation - Cast u64 to unsigned long long for printf() Changes v2-v3: - Rebased on Chris'' current master Changes v3-v4: - Add padding at end of ioctl structure Changes v4-v5: - The statistic members in the ioctl are now organized as an array of 64 bit values. Symbolic names for the array indexes

This is a first draft of a subvolume quota implementation. It is possible to limit subvolumes and any group of subvolumes and also to track the amount of space that will get freed when deleting snapshots. The current version is functionally incomplete, with the main missing feature being the initial scan and rescan of an existing filesystem. I put some effort into writing an introduction into