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authorAl Viro <viro@zeniv.linux.org.uk>2015-06-18 17:11:49 -0400
committerAl Viro <viro@zeniv.linux.org.uk>2015-07-06 17:39:45 -0400
commit6d1ebbca2b2fe516ff5f279848cffbd23d2b0270 (patch)
tree777236223de7601dd0e18e0e96ba0c2dcf1a28d7 /fs/ufs/inode.c
parenta138b4b688c10eb82044451b81534c382d1cddbd (diff)
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split ufs_truncate_branch() into full- and partial-branch variants
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/ufs/inode.c')
-rw-r--r--fs/ufs/inode.c74
1 files changed, 58 insertions, 16 deletions
diff --git a/fs/ufs/inode.c b/fs/ufs/inode.c
index 39de7782b7c5..c06556558c9b 100644
--- a/fs/ufs/inode.c
+++ b/fs/ufs/inode.c
@@ -1070,6 +1070,60 @@ next1:
UFSD("EXIT: ino %lu\n", inode->i_ino);
}
+static void free_full_branch(struct inode *inode, int depth, void *p)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
+ struct ufs_inode_info *ufsi = UFS_I(inode);
+ struct ufs_buffer_head *ubh;
+ u64 tmp;
+ unsigned i;
+
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ if (!tmp)
+ return;
+ ubh = ubh_bread (sb, tmp, uspi->s_bsize);
+ if (!ubh) {
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+ return;
+ }
+
+ if (--depth) {
+ for (i = 0 ; i < uspi->s_apb ; i++) {
+ void *ind = ubh_get_data_ptr(uspi, ubh, i);
+ free_full_branch(inode, depth, ind);
+ ubh_mark_buffer_dirty(ubh);
+ }
+ } else {
+ struct to_free ctx = {.inode = inode};
+
+ for (i = 0; i < uspi->s_apb; i++) {
+ void *ind = ubh_get_data_ptr(uspi, ubh, i);
+ tmp = ufs_data_ptr_to_cpu(sb, ind);
+ if (!tmp)
+ continue;
+
+ write_seqlock(&UFS_I(inode)->meta_lock);
+ ufs_data_ptr_clear(uspi, ind);
+ write_sequnlock(&UFS_I(inode)->meta_lock);
+ ubh_mark_buffer_dirty(ubh);
+ free_data(&ctx, tmp, uspi->s_fpb);
+ mark_inode_dirty(inode);
+ }
+ free_data(&ctx, 0, 0);
+ }
+ tmp = ufs_data_ptr_to_cpu(sb, p);
+ write_seqlock(&ufsi->meta_lock);
+ ufs_data_ptr_clear(uspi, p);
+ write_sequnlock(&ufsi->meta_lock);
+
+ ubh_bforget(ubh);
+ ufs_free_blocks(inode, tmp, uspi->s_fpb);
+ mark_inode_dirty(inode);
+}
+
static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2, int depth, void *p)
{
struct super_block *sb = inode->i_sb;
@@ -1077,8 +1131,7 @@ static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2,
struct ufs_inode_info *ufsi = UFS_I(inode);
struct ufs_buffer_head *ubh;
u64 tmp;
- bool free_it = !offsets;
- unsigned from = offsets ? *offsets++ : 0;
+ unsigned from = *offsets++;
unsigned i;
tmp = ufs_data_ptr_to_cpu(sb, p);
@@ -1093,14 +1146,14 @@ static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2,
}
if (--depth) {
- if (offsets && --depth2) {
+ if (--depth2) {
void *ind = ubh_get_data_ptr(uspi, ubh, from++);
ufs_trunc_branch(inode, offsets, depth2, depth, ind);
ubh_mark_buffer_dirty(ubh);
}
for (i = from ; i < uspi->s_apb ; i++) {
void *ind = ubh_get_data_ptr(uspi, ubh, i);
- ufs_trunc_branch(inode, NULL, 0, depth, ind);
+ free_full_branch(inode, depth, ind);
ubh_mark_buffer_dirty(ubh);
}
} else {
@@ -1121,17 +1174,6 @@ static void ufs_trunc_branch(struct inode *inode, unsigned *offsets, int depth2,
}
free_data(&ctx, 0, 0);
}
- if (free_it) {
- tmp = ufs_data_ptr_to_cpu(sb, p);
- write_seqlock(&ufsi->meta_lock);
- ufs_data_ptr_clear(uspi, p);
- write_sequnlock(&ufsi->meta_lock);
-
- ubh_bforget(ubh);
- ufs_free_blocks(inode, tmp, uspi->s_fpb);
- mark_inode_dirty(inode);
- return;
- }
if (IS_SYNC(inode) && ubh_buffer_dirty(ubh))
ubh_sync_block(ubh);
ubh_brelse(ubh);
@@ -1235,7 +1277,7 @@ static void __ufs_truncate_blocks(struct inode *inode)
ufs_get_direct_data_ptr(uspi, ufsi, offsets[0]++));
}
for (i = offsets[0]; i <= UFS_TIND_BLOCK; i++) {
- ufs_trunc_branch(inode, NULL, 0, i - UFS_IND_BLOCK + 1,
+ free_full_branch(inode, i - UFS_IND_BLOCK + 1,
ufs_get_direct_data_ptr(uspi, ufsi, i));
}
ufsi->i_lastfrag = DIRECT_FRAGMENT;