diff options
author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-06-12 10:02:03 -0500 |
---|---|---|
committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-06-12 10:02:03 -0500 |
commit | 82681a318f9f028ea64e61f24bbd9ac535531921 (patch) | |
tree | 529b6a5b4fd040fb54b7672b1a224ebd47445876 /fs/btrfs/ioctl.c | |
parent | 3860c97bd60a4525bb62eb90e3e7d2f02662ac59 (diff) | |
parent | 8ebf975608aaebd7feb33d77f07ba21a6380e086 (diff) |
[SCSI] Merge branch 'linus'
Conflicts:
drivers/message/fusion/mptsas.c
fixed up conflict between req->data_len accessors and mptsas driver updates.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r-- | fs/btrfs/ioctl.c | 197 |
1 files changed, 188 insertions, 9 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c index 2624b53ea78..eff18f5b536 100644 --- a/fs/btrfs/ioctl.c +++ b/fs/btrfs/ioctl.c @@ -50,7 +50,177 @@ #include "volumes.h" #include "locking.h" +/* Mask out flags that are inappropriate for the given type of inode. */ +static inline __u32 btrfs_mask_flags(umode_t mode, __u32 flags) +{ + if (S_ISDIR(mode)) + return flags; + else if (S_ISREG(mode)) + return flags & ~FS_DIRSYNC_FL; + else + return flags & (FS_NODUMP_FL | FS_NOATIME_FL); +} + +/* + * Export inode flags to the format expected by the FS_IOC_GETFLAGS ioctl. + */ +static unsigned int btrfs_flags_to_ioctl(unsigned int flags) +{ + unsigned int iflags = 0; + + if (flags & BTRFS_INODE_SYNC) + iflags |= FS_SYNC_FL; + if (flags & BTRFS_INODE_IMMUTABLE) + iflags |= FS_IMMUTABLE_FL; + if (flags & BTRFS_INODE_APPEND) + iflags |= FS_APPEND_FL; + if (flags & BTRFS_INODE_NODUMP) + iflags |= FS_NODUMP_FL; + if (flags & BTRFS_INODE_NOATIME) + iflags |= FS_NOATIME_FL; + if (flags & BTRFS_INODE_DIRSYNC) + iflags |= FS_DIRSYNC_FL; + + return iflags; +} + +/* + * Update inode->i_flags based on the btrfs internal flags. + */ +void btrfs_update_iflags(struct inode *inode) +{ + struct btrfs_inode *ip = BTRFS_I(inode); + + inode->i_flags &= ~(S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC); + + if (ip->flags & BTRFS_INODE_SYNC) + inode->i_flags |= S_SYNC; + if (ip->flags & BTRFS_INODE_IMMUTABLE) + inode->i_flags |= S_IMMUTABLE; + if (ip->flags & BTRFS_INODE_APPEND) + inode->i_flags |= S_APPEND; + if (ip->flags & BTRFS_INODE_NOATIME) + inode->i_flags |= S_NOATIME; + if (ip->flags & BTRFS_INODE_DIRSYNC) + inode->i_flags |= S_DIRSYNC; +} + +/* + * Inherit flags from the parent inode. + * + * Unlike extN we don't have any flags we don't want to inherit currently. + */ +void btrfs_inherit_iflags(struct inode *inode, struct inode *dir) +{ + unsigned int flags; + + if (!dir) + return; + + flags = BTRFS_I(dir)->flags; + + if (S_ISREG(inode->i_mode)) + flags &= ~BTRFS_INODE_DIRSYNC; + else if (!S_ISDIR(inode->i_mode)) + flags &= (BTRFS_INODE_NODUMP | BTRFS_INODE_NOATIME); + + BTRFS_I(inode)->flags = flags; + btrfs_update_iflags(inode); +} + +static int btrfs_ioctl_getflags(struct file *file, void __user *arg) +{ + struct btrfs_inode *ip = BTRFS_I(file->f_path.dentry->d_inode); + unsigned int flags = btrfs_flags_to_ioctl(ip->flags); + + if (copy_to_user(arg, &flags, sizeof(flags))) + return -EFAULT; + return 0; +} + +static int btrfs_ioctl_setflags(struct file *file, void __user *arg) +{ + struct inode *inode = file->f_path.dentry->d_inode; + struct btrfs_inode *ip = BTRFS_I(inode); + struct btrfs_root *root = ip->root; + struct btrfs_trans_handle *trans; + unsigned int flags, oldflags; + int ret; + + if (copy_from_user(&flags, arg, sizeof(flags))) + return -EFAULT; + + if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ + FS_NOATIME_FL | FS_NODUMP_FL | \ + FS_SYNC_FL | FS_DIRSYNC_FL)) + return -EOPNOTSUPP; + if (!is_owner_or_cap(inode)) + return -EACCES; + + mutex_lock(&inode->i_mutex); + + flags = btrfs_mask_flags(inode->i_mode, flags); + oldflags = btrfs_flags_to_ioctl(ip->flags); + if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) { + if (!capable(CAP_LINUX_IMMUTABLE)) { + ret = -EPERM; + goto out_unlock; + } + } + + ret = mnt_want_write(file->f_path.mnt); + if (ret) + goto out_unlock; + + if (flags & FS_SYNC_FL) + ip->flags |= BTRFS_INODE_SYNC; + else + ip->flags &= ~BTRFS_INODE_SYNC; + if (flags & FS_IMMUTABLE_FL) + ip->flags |= BTRFS_INODE_IMMUTABLE; + else + ip->flags &= ~BTRFS_INODE_IMMUTABLE; + if (flags & FS_APPEND_FL) + ip->flags |= BTRFS_INODE_APPEND; + else + ip->flags &= ~BTRFS_INODE_APPEND; + if (flags & FS_NODUMP_FL) + ip->flags |= BTRFS_INODE_NODUMP; + else + ip->flags &= ~BTRFS_INODE_NODUMP; + if (flags & FS_NOATIME_FL) + ip->flags |= BTRFS_INODE_NOATIME; + else + ip->flags &= ~BTRFS_INODE_NOATIME; + if (flags & FS_DIRSYNC_FL) + ip->flags |= BTRFS_INODE_DIRSYNC; + else + ip->flags &= ~BTRFS_INODE_DIRSYNC; + + + trans = btrfs_join_transaction(root, 1); + BUG_ON(!trans); + + ret = btrfs_update_inode(trans, root, inode); + BUG_ON(ret); + + btrfs_update_iflags(inode); + inode->i_ctime = CURRENT_TIME; + btrfs_end_transaction(trans, root); + + mnt_drop_write(file->f_path.mnt); + out_unlock: + mutex_unlock(&inode->i_mutex); + return 0; +} + +static int btrfs_ioctl_getversion(struct file *file, int __user *arg) +{ + struct inode *inode = file->f_path.dentry->d_inode; + + return put_user(inode->i_generation, arg); +} static noinline int create_subvol(struct btrfs_root *root, struct dentry *dentry, @@ -82,22 +252,25 @@ static noinline int create_subvol(struct btrfs_root *root, if (ret) goto fail; - leaf = btrfs_alloc_free_block(trans, root, root->leafsize, 0, - objectid, trans->transid, 0, 0, 0); + leaf = btrfs_alloc_free_block(trans, root, root->leafsize, + 0, objectid, NULL, 0, 0, 0); if (IS_ERR(leaf)) { ret = PTR_ERR(leaf); goto fail; } - btrfs_set_header_nritems(leaf, 0); - btrfs_set_header_level(leaf, 0); + memset_extent_buffer(leaf, 0, 0, sizeof(struct btrfs_header)); btrfs_set_header_bytenr(leaf, leaf->start); btrfs_set_header_generation(leaf, trans->transid); + btrfs_set_header_backref_rev(leaf, BTRFS_MIXED_BACKREF_REV); btrfs_set_header_owner(leaf, objectid); write_extent_buffer(leaf, root->fs_info->fsid, (unsigned long)btrfs_header_fsid(leaf), BTRFS_FSID_SIZE); + write_extent_buffer(leaf, root->fs_info->chunk_tree_uuid, + (unsigned long)btrfs_header_chunk_tree_uuid(leaf), + BTRFS_UUID_SIZE); btrfs_mark_buffer_dirty(leaf); inode_item = &root_item.inode; @@ -125,7 +298,7 @@ static noinline int create_subvol(struct btrfs_root *root, btrfs_set_root_dirid(&root_item, new_dirid); key.objectid = objectid; - key.offset = 1; + key.offset = 0; btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); ret = btrfs_insert_root(trans, root->fs_info->tree_root, &key, &root_item); @@ -911,10 +1084,10 @@ static long btrfs_ioctl_clone(struct file *file, unsigned long srcfd, if (disko) { inode_add_bytes(inode, datal); ret = btrfs_inc_extent_ref(trans, root, - disko, diskl, leaf->start, - root->root_key.objectid, - trans->transid, - inode->i_ino); + disko, diskl, 0, + root->root_key.objectid, + inode->i_ino, + new_key.offset - datao); BUG_ON(ret); } } else if (type == BTRFS_FILE_EXTENT_INLINE) { @@ -1074,6 +1247,12 @@ long btrfs_ioctl(struct file *file, unsigned int void __user *argp = (void __user *)arg; switch (cmd) { + case FS_IOC_GETFLAGS: + return btrfs_ioctl_getflags(file, argp); + case FS_IOC_SETFLAGS: + return btrfs_ioctl_setflags(file, argp); + case FS_IOC_GETVERSION: + return btrfs_ioctl_getversion(file, argp); case BTRFS_IOC_SNAP_CREATE: return btrfs_ioctl_snap_create(file, argp, 0); case BTRFS_IOC_SUBVOL_CREATE: |