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author | Josef Bacik <josef@redhat.com> | 2011-01-31 15:30:16 -0500 |
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committer | Josef Bacik <josef@redhat.com> | 2011-03-17 14:21:22 -0400 |
commit | a41ad394a03b802497958d7c98a9dcf607266645 (patch) | |
tree | f18d97b7feb5c3dcf0d3c1a670d4eaf6b94e8b79 /fs/btrfs | |
parent | dc89e9824464e91fa0b06267864ceabe3186fd8b (diff) | |
download | kernel_samsung_tuna-a41ad394a03b802497958d7c98a9dcf607266645.zip kernel_samsung_tuna-a41ad394a03b802497958d7c98a9dcf607266645.tar.gz kernel_samsung_tuna-a41ad394a03b802497958d7c98a9dcf607266645.tar.bz2 |
Btrfs: convert to the new truncate sequence
->truncate() is going away, instead all of the work needs to be done in
->setattr(). So this converts us over to do this. It's fairly straightforward,
just get rid of our .truncate inode operation and call btrfs_truncate() directly
from btrfs_setsize. This works out better for us since truncate can technically
return ENOSPC, and before we had no way of letting anybody know. Thanks,
Signed-off-by: Josef Bacik <josef@redhat.com>
Diffstat (limited to 'fs/btrfs')
-rw-r--r-- | fs/btrfs/ctree.h | 2 | ||||
-rw-r--r-- | fs/btrfs/file.c | 5 | ||||
-rw-r--r-- | fs/btrfs/inode.c | 80 |
3 files changed, 40 insertions, 47 deletions
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h index 2c98d20..34142d5 100644 --- a/fs/btrfs/ctree.h +++ b/fs/btrfs/ctree.h @@ -2537,7 +2537,7 @@ void btrfs_orphan_post_snapshot(struct btrfs_trans_handle *trans, struct btrfs_pending_snapshot *pending); void btrfs_orphan_commit_root(struct btrfs_trans_handle *trans, struct btrfs_root *root); -int btrfs_cont_expand(struct inode *inode, loff_t size); +int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size); int btrfs_invalidate_inodes(struct btrfs_root *root); void btrfs_add_delayed_iput(struct inode *inode); void btrfs_run_delayed_iputs(struct btrfs_root *root); diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 24a19c2..3786eca 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -817,7 +817,7 @@ static noinline int prepare_pages(struct btrfs_root *root, struct file *file, last_pos = ((u64)index + num_pages) << PAGE_CACHE_SHIFT; if (start_pos > inode->i_size) { - err = btrfs_cont_expand(inode, start_pos); + err = btrfs_cont_expand(inode, i_size_read(inode), start_pos); if (err) return err; } @@ -1330,7 +1330,8 @@ static long btrfs_fallocate(struct file *file, int mode, goto out; if (alloc_start > inode->i_size) { - ret = btrfs_cont_expand(inode, alloc_start); + ret = btrfs_cont_expand(inode, i_size_read(inode), + alloc_start); if (ret) goto out; } diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 2d2e079..3662ffe 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -84,7 +84,8 @@ static unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = { [S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK, }; -static void btrfs_truncate(struct inode *inode); +static int btrfs_setsize(struct inode *inode, loff_t newsize); +static int btrfs_truncate(struct inode *inode); static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end); static noinline int cow_file_range(struct inode *inode, struct page *locked_page, @@ -2371,6 +2372,11 @@ void btrfs_orphan_cleanup(struct btrfs_root *root) /* if we have links, this was a truncate, lets do that */ if (inode->i_nlink) { + if (!S_ISREG(inode->i_mode)) { + WARN_ON(1); + iput(inode); + continue; + } nr_truncate++; btrfs_truncate(inode); } else { @@ -3538,7 +3544,7 @@ out: return ret; } -int btrfs_cont_expand(struct inode *inode, loff_t size) +int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size) { struct btrfs_trans_handle *trans; struct btrfs_root *root = BTRFS_I(inode)->root; @@ -3546,7 +3552,7 @@ int btrfs_cont_expand(struct inode *inode, loff_t size) struct extent_map *em = NULL; struct extent_state *cached_state = NULL; u64 mask = root->sectorsize - 1; - u64 hole_start = (inode->i_size + mask) & ~mask; + u64 hole_start = (oldsize + mask) & ~mask; u64 block_end = (size + mask) & ~mask; u64 last_byte; u64 cur_offset; @@ -3617,27 +3623,17 @@ int btrfs_cont_expand(struct inode *inode, loff_t size) return err; } -static int btrfs_setattr_size(struct inode *inode, struct iattr *attr) +static int btrfs_setsize(struct inode *inode, loff_t newsize) { struct btrfs_root *root = BTRFS_I(inode)->root; struct btrfs_trans_handle *trans; + loff_t oldsize = i_size_read(inode); unsigned long nr; int ret; - if (attr->ia_size == inode->i_size) + if (newsize == oldsize) return 0; - if (attr->ia_size > inode->i_size) { - unsigned long limit; - limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; - if (attr->ia_size > inode->i_sb->s_maxbytes) - return -EFBIG; - if (limit != RLIM_INFINITY && attr->ia_size > limit) { - send_sig(SIGXFSZ, current, 0); - return -EFBIG; - } - } - trans = btrfs_start_transaction(root, 5); if (IS_ERR(trans)) return PTR_ERR(trans); @@ -3651,16 +3647,16 @@ static int btrfs_setattr_size(struct inode *inode, struct iattr *attr) btrfs_end_transaction(trans, root); btrfs_btree_balance_dirty(root, nr); - if (attr->ia_size > inode->i_size) { - ret = btrfs_cont_expand(inode, attr->ia_size); + if (newsize > oldsize) { + i_size_write(inode, newsize); + btrfs_ordered_update_i_size(inode, i_size_read(inode), NULL); + truncate_pagecache(inode, oldsize, newsize); + ret = btrfs_cont_expand(inode, oldsize, newsize); if (ret) { - btrfs_truncate(inode); + btrfs_setsize(inode, oldsize); return ret; } - i_size_write(inode, attr->ia_size); - btrfs_ordered_update_i_size(inode, inode->i_size, NULL); - trans = btrfs_start_transaction(root, 0); BUG_ON(IS_ERR(trans)); btrfs_set_trans_block_group(trans, inode); @@ -3676,22 +3672,22 @@ static int btrfs_setattr_size(struct inode *inode, struct iattr *attr) nr = trans->blocks_used; btrfs_end_transaction(trans, root); btrfs_btree_balance_dirty(root, nr); - return 0; - } + } else { - /* - * We're truncating a file that used to have good data down to - * zero. Make sure it gets into the ordered flush list so that - * any new writes get down to disk quickly. - */ - if (attr->ia_size == 0) - BTRFS_I(inode)->ordered_data_close = 1; + /* + * We're truncating a file that used to have good data down to + * zero. Make sure it gets into the ordered flush list so that + * any new writes get down to disk quickly. + */ + if (newsize == 0) + BTRFS_I(inode)->ordered_data_close = 1; - /* we don't support swapfiles, so vmtruncate shouldn't fail */ - ret = vmtruncate(inode, attr->ia_size); - BUG_ON(ret); + /* we don't support swapfiles, so vmtruncate shouldn't fail */ + truncate_setsize(inode, newsize); + ret = btrfs_truncate(inode); + } - return 0; + return ret; } static int btrfs_setattr(struct dentry *dentry, struct iattr *attr) @@ -3708,7 +3704,7 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr) return err; if (S_ISREG(inode->i_mode) && (attr->ia_valid & ATTR_SIZE)) { - err = btrfs_setattr_size(inode, attr); + err = btrfs_setsize(inode, attr->ia_size); if (err) return err; } @@ -6478,7 +6474,7 @@ out: return ret; } -static void btrfs_truncate(struct inode *inode) +static int btrfs_truncate(struct inode *inode) { struct btrfs_root *root = BTRFS_I(inode)->root; int ret; @@ -6486,14 +6482,9 @@ static void btrfs_truncate(struct inode *inode) unsigned long nr; u64 mask = root->sectorsize - 1; - if (!S_ISREG(inode->i_mode)) { - WARN_ON(1); - return; - } - ret = btrfs_truncate_page(inode->i_mapping, inode->i_size); if (ret) - return; + return ret; btrfs_wait_ordered_range(inode, inode->i_size & (~mask), (u64)-1); btrfs_ordered_update_i_size(inode, inode->i_size, NULL); @@ -6568,6 +6559,8 @@ static void btrfs_truncate(struct inode *inode) ret = btrfs_end_transaction_throttle(trans, root); BUG_ON(ret); btrfs_btree_balance_dirty(root, nr); + + return ret; } /* @@ -7367,7 +7360,6 @@ static const struct address_space_operations btrfs_symlink_aops = { }; static const struct inode_operations btrfs_file_inode_operations = { - .truncate = btrfs_truncate, .getattr = btrfs_getattr, .setattr = btrfs_setattr, .setxattr = btrfs_setxattr, |