diff options
Diffstat (limited to 'fs/xfs/libxfs/xfs_ialloc.h')
| -rw-r--r-- | fs/xfs/libxfs/xfs_ialloc.h | 36 |
1 files changed, 16 insertions, 20 deletions
diff --git a/fs/xfs/libxfs/xfs_ialloc.h b/fs/xfs/libxfs/xfs_ialloc.h index 72b3468b97b1..3511086a7ae1 100644 --- a/fs/xfs/libxfs/xfs_ialloc.h +++ b/fs/xfs/libxfs/xfs_ialloc.h @@ -37,30 +37,26 @@ xfs_make_iptr(struct xfs_mount *mp, struct xfs_buf *b, int o) * Mode is used to tell whether the new inode will need space, and whether * it is a directory. * - * To work within the constraint of one allocation per transaction, - * xfs_dialloc() is designed to be called twice if it has to do an - * allocation to make more free inodes. If an inode is - * available without an allocation, agbp would be set to the current - * agbp and alloc_done set to false. - * If an allocation needed to be done, agbp would be set to the - * inode header of the allocation group and alloc_done set to true. - * The caller should then commit the current transaction and allocate a new - * transaction. xfs_dialloc() should then be called again with - * the agbp value returned from the previous call. - * - * Once we successfully pick an inode its number is returned and the - * on-disk data structures are updated. The inode itself is not read - * in, since doing so would break ordering constraints with xfs_reclaim. - * - * *agbp should be set to NULL on the first call, *alloc_done set to FALSE. + * There are two phases to inode allocation: selecting an AG and ensuring + * that it contains free inodes, followed by allocating one of the free + * inodes. xfs_dialloc_select_ag() does the former and returns a locked AGI + * to the caller, ensuring that followup call to xfs_dialloc_ag() will + * have free inodes to allocate from. xfs_dialloc_ag() will return the inode + * number of the free inode we allocated. */ int /* error */ -xfs_dialloc( - struct xfs_trans *tp, /* transaction pointer */ +xfs_dialloc_select_ag( + struct xfs_trans **tpp, /* double pointer of transaction */ xfs_ino_t parent, /* parent inode (directory) */ umode_t mode, /* mode bits for new inode */ - struct xfs_buf **agbp, /* buf for a.g. inode header */ - xfs_ino_t *inop); /* inode number allocated */ + struct xfs_buf **IO_agbp); + +int +xfs_dialloc_ag( + struct xfs_trans *tp, + struct xfs_buf *agbp, + xfs_ino_t parent, + xfs_ino_t *inop); /* * Free disk inode. Carefully avoids touching the incore inode, all |