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authorLinus Torvalds <torvalds@linux-foundation.org>2010-04-12 18:37:04 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2010-04-12 18:37:04 -0700
commitd6cf853d4d73c268fc8920ac4e812ee26a12847c (patch)
treec909145638eb5c4897ea7e424759eb9b564ebe18
parent6a945f38be5f2c198853069a336c887a51d1a238 (diff)
parent9f680ce04ea19dabbbafe01b57b61930a9b70741 (diff)
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable
* 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: make sure the chunk allocator doesn't create zero length chunks Btrfs: fix data enospc check overflow
-rw-r--r--fs/btrfs/extent-tree.c20
-rw-r--r--fs/btrfs/volumes.c6
2 files changed, 21 insertions, 5 deletions
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index 9e23ffea7f54..b34d32fdaaec 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -3235,7 +3235,8 @@ int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
u64 bytes)
{
struct btrfs_space_info *data_sinfo;
- int ret = 0, committed = 0;
+ u64 used;
+ int ret = 0, committed = 0, flushed = 0;
/* make sure bytes are sectorsize aligned */
bytes = (bytes + root->sectorsize - 1) & ~((u64)root->sectorsize - 1);
@@ -3247,12 +3248,21 @@ int btrfs_check_data_free_space(struct btrfs_root *root, struct inode *inode,
again:
/* make sure we have enough space to handle the data first */
spin_lock(&data_sinfo->lock);
- if (data_sinfo->total_bytes - data_sinfo->bytes_used -
- data_sinfo->bytes_delalloc - data_sinfo->bytes_reserved -
- data_sinfo->bytes_pinned - data_sinfo->bytes_readonly -
- data_sinfo->bytes_may_use - data_sinfo->bytes_super < bytes) {
+ used = data_sinfo->bytes_used + data_sinfo->bytes_delalloc +
+ data_sinfo->bytes_reserved + data_sinfo->bytes_pinned +
+ data_sinfo->bytes_readonly + data_sinfo->bytes_may_use +
+ data_sinfo->bytes_super;
+
+ if (used + bytes > data_sinfo->total_bytes) {
struct btrfs_trans_handle *trans;
+ if (!flushed) {
+ spin_unlock(&data_sinfo->lock);
+ flush_delalloc(root, data_sinfo);
+ flushed = 1;
+ goto again;
+ }
+
/*
* if we don't have enough free bytes in this space then we need
* to alloc a new chunk.
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index aa7dc36dac78..8db7b14bbae8 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2250,6 +2250,12 @@ again:
if (!looped)
calc_size = max_t(u64, min_stripe_size, calc_size);
+ /*
+ * we're about to do_div by the stripe_len so lets make sure
+ * we end up with something bigger than a stripe
+ */
+ calc_size = max_t(u64, calc_size, stripe_len * 4);
+
do_div(calc_size, stripe_len);
calc_size *= stripe_len;