diff options
Diffstat (limited to 'fs/btrfs/delalloc-space.c')
| -rw-r--r-- | fs/btrfs/delalloc-space.c | 74 |
1 files changed, 42 insertions, 32 deletions
diff --git a/fs/btrfs/delalloc-space.c b/fs/btrfs/delalloc-space.c index 1e8f17ff829e..7ddb1d104e8e 100644 --- a/fs/btrfs/delalloc-space.c +++ b/fs/btrfs/delalloc-space.c @@ -1,5 +1,6 @@ // SPDX-License-Identifier: GPL-2.0 +#include "messages.h" #include "ctree.h" #include "delalloc-space.h" #include "block-rsv.h" @@ -8,6 +9,7 @@ #include "transaction.h" #include "qgroup.h" #include "block-group.h" +#include "fs.h" /* * HOW DOES THIS WORK @@ -127,9 +129,11 @@ int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes) } int btrfs_check_data_free_space(struct btrfs_inode *inode, - struct extent_changeset **reserved, u64 start, u64 len) + struct extent_changeset **reserved, u64 start, + u64 len, bool noflush) { struct btrfs_fs_info *fs_info = inode->root->fs_info; + enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_DATA; int ret; /* align the range */ @@ -137,7 +141,12 @@ int btrfs_check_data_free_space(struct btrfs_inode *inode, round_down(start, fs_info->sectorsize); start = round_down(start, fs_info->sectorsize); - ret = btrfs_alloc_data_chunk_ondemand(inode, len); + if (noflush) + flush = BTRFS_RESERVE_NO_FLUSH; + else if (btrfs_is_free_space_inode(inode)) + flush = BTRFS_RESERVE_FLUSH_FREE_SPACE_INODE; + + ret = btrfs_reserve_data_bytes(fs_info, len, flush); if (ret < 0) return ret; @@ -193,8 +202,8 @@ void btrfs_free_reserved_data_space(struct btrfs_inode *inode, btrfs_qgroup_free_data(inode, reserved, start, len); } -/** - * Release any excessive reservation +/* + * Release any excessive reservations for an inode. * * @inode: the inode we need to release from * @qgroup_free: free or convert qgroup meta. Unlike normal operation, qgroup @@ -368,12 +377,12 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes, return 0; } -/** - * Release a metadata reservation for an inode +/* + * Release a metadata reservation for an inode. * - * @inode: the inode to release the reservation for. - * @num_bytes: the number of bytes we are releasing. - * @qgroup_free: free qgroup reservation or convert it to per-trans reservation + * @inode: the inode to release the reservation for. + * @num_bytes: the number of bytes we are releasing. + * @qgroup_free: free qgroup reservation or convert it to per-trans reservation * * This will release the metadata reservation for an inode. This can be called * once we complete IO for a given set of bytes to release their metadata @@ -396,10 +405,11 @@ void btrfs_delalloc_release_metadata(struct btrfs_inode *inode, u64 num_bytes, btrfs_inode_rsv_release(inode, qgroup_free); } -/** - * btrfs_delalloc_release_extents - release our outstanding_extents - * @inode: the inode to balance the reservation for. - * @num_bytes: the number of bytes we originally reserved with +/* + * Release our outstanding_extents for an inode. + * + * @inode: the inode to balance the reservation for. + * @num_bytes: the number of bytes we originally reserved with * * When we reserve space we increase outstanding_extents for the extents we may * add. Once we've set the range as delalloc or created our ordered extents we @@ -424,37 +434,37 @@ void btrfs_delalloc_release_extents(struct btrfs_inode *inode, u64 num_bytes) btrfs_inode_rsv_release(inode, true); } -/** - * btrfs_delalloc_reserve_space - reserve data and metadata space for - * delalloc - * @inode: inode we're writing to - * @start: start range we are writing to - * @len: how long the range we are writing to - * @reserved: mandatory parameter, record actually reserved qgroup ranges of - * current reservation. +/* + * Reserve data and metadata space for delalloc + * + * @inode: inode we're writing to + * @start: start range we are writing to + * @len: how long the range we are writing to + * @reserved: mandatory parameter, record actually reserved qgroup ranges of + * current reservation. * * This will do the following things * - * - reserve space in data space info for num bytes - * and reserve precious corresponding qgroup space + * - reserve space in data space info for num bytes and reserve precious + * corresponding qgroup space * (Done in check_data_free_space) * * - reserve space for metadata space, based on the number of outstanding - * extents and how much csums will be needed - * also reserve metadata space in a per root over-reserve method. + * extents and how much csums will be needed also reserve metadata space in a + * per root over-reserve method. * - add to the inodes->delalloc_bytes * - add it to the fs_info's delalloc inodes list. * (Above 3 all done in delalloc_reserve_metadata) * * Return 0 for success - * Return <0 for error(-ENOSPC or -EQUOT) + * Return <0 for error(-ENOSPC or -EDQUOT) */ int btrfs_delalloc_reserve_space(struct btrfs_inode *inode, struct extent_changeset **reserved, u64 start, u64 len) { int ret; - ret = btrfs_check_data_free_space(inode, reserved, start, len); + ret = btrfs_check_data_free_space(inode, reserved, start, len, false); if (ret < 0) return ret; ret = btrfs_delalloc_reserve_metadata(inode, len, len, false); @@ -466,7 +476,7 @@ int btrfs_delalloc_reserve_space(struct btrfs_inode *inode, return ret; } -/** +/* * Release data and metadata space for delalloc * * @inode: inode we're releasing space for @@ -475,10 +485,10 @@ int btrfs_delalloc_reserve_space(struct btrfs_inode *inode, * @len: length of the space already reserved * @qgroup_free: should qgroup reserved-space also be freed * - * This function will release the metadata space that was not used and will - * decrement ->delalloc_bytes and remove it from the fs_info delalloc_inodes - * list if there are no delalloc bytes left. - * Also it will handle the qgroup reserved space. + * Release the metadata space that was not used and will decrement + * ->delalloc_bytes and remove it from the fs_info->delalloc_inodes list if + * there are no delalloc bytes left. Also it will handle the qgroup reserved + * space. */ void btrfs_delalloc_release_space(struct btrfs_inode *inode, struct extent_changeset *reserved, |