[PATCH 11/25] Unionfs: add un/likely conditionals on debug ops

From: Erez Zadok
Date: Tue Sep 25 2007 - 23:34:36 EST

Signed-off-by: Erez Zadok <ezk@xxxxxxxxxxxxx>
---
fs/unionfs/debug.c | 108 +++++++++++++++++++++++++++------------------------
1 files changed, 57 insertions(+), 51 deletions(-)

diff --git a/fs/unionfs/debug.c b/fs/unionfs/debug.c
index 9546a41..09b52ce 100644
--- a/fs/unionfs/debug.c
+++ b/fs/unionfs/debug.c
@@ -56,19 +56,19 @@ void __unionfs_check_inode(const struct inode *inode,
sb = inode->i_sb;
istart = ibstart(inode);
iend = ibend(inode);
- if (istart > iend) {
+ if (unlikely(istart > iend)) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci0: inode=%p istart/end=%d:%d\n",
inode, istart, iend);
}
- if ((istart == -1 && iend != -1) ||
- (istart != -1 && iend == -1)) {
+ if (unlikely((istart == -1 && iend != -1) ||
+ (istart != -1 && iend == -1))) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci1: inode=%p istart/end=%d:%d\n",
inode, istart, iend);
}
if (!S_ISDIR(inode->i_mode)) {
- if (iend != istart) {
+ if (unlikely(iend != istart)) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci2: inode=%p istart=%d iend=%d\n",
inode, istart, iend);
@@ -76,24 +76,24 @@ void __unionfs_check_inode(const struct inode *inode,
}

for (bindex = sbstart(sb); bindex < sbmax(sb); bindex++) {
- if (!UNIONFS_I(inode)) {
+ if (unlikely(!UNIONFS_I(inode))) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci3: no inode_info %p\n", inode);
return;
}
- if (!UNIONFS_I(inode)->lower_inodes) {
+ if (unlikely(!UNIONFS_I(inode)->lower_inodes)) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci4: no lower_inodes %p\n", inode);
return;
}
lower_inode = unionfs_lower_inode_idx(inode, bindex);
if (lower_inode) {
- if (bindex < istart || bindex > iend) {
+ if (unlikely(bindex < istart || bindex > iend)) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci5: inode/linode=%p:%p bindex=%d "
"istart/end=%d:%d\n", inode,
lower_inode, bindex, istart, iend);
- } else if (lower_inode == POISONED_PTR) {
+ } else if (unlikely(lower_inode == POISONED_PTR)) {
/* freed inode! */
PRINT_CALLER(fname, fxn, line);
printk(" Ci6: inode/linode=%p:%p bindex=%d "
@@ -107,8 +107,9 @@ void __unionfs_check_inode(const struct inode *inode,
* b/t start/end, but NOT if at the
* start/end range.
*/
- if (!(S_ISDIR(inode->i_mode) &&
- bindex > istart && bindex < iend)) {
+ if (unlikely(!(S_ISDIR(inode->i_mode) &&
+ bindex > istart &&
+ bindex < iend))) {
PRINT_CALLER(fname, fxn, line);
printk(" Ci7: inode/linode=%p:%p "
"bindex=%d istart/end=%d:%d\n",
@@ -138,8 +139,8 @@ void __unionfs_check_dentry(const struct dentry *dentry,
dend = dbend(dentry);
BUG_ON(dstart > dend);

- if ((dstart == -1 && dend != -1) ||
- (dstart != -1 && dend == -1)) {
+ if (unlikely((dstart == -1 && dend != -1) ||
+ (dstart != -1 && dend == -1))) {
PRINT_CALLER(fname, fxn, line);
printk(" CD0: dentry=%p dstart/end=%d:%d\n",
dentry, dstart, dend);
@@ -151,7 +152,7 @@ void __unionfs_check_dentry(const struct dentry *dentry,
for (bindex = sbstart(sb); bindex < sbmax(sb); bindex++) {
lower_dentry = unionfs_lower_dentry_idx(dentry, bindex);
if (lower_dentry) {
- if (bindex < dstart || bindex > dend) {
+ if (unlikely(bindex < dstart || bindex > dend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CD1: dentry/lower=%p:%p(%p) "
"bindex=%d dstart/end=%d:%d\n",
@@ -169,10 +170,10 @@ void __unionfs_check_dentry(const struct dentry *dentry,
* however, if this is a NULL dentry or a
* deleted dentry.
*/
- if (!d_deleted((struct dentry *) dentry) &&
- inode &&
- !(inode && S_ISDIR(inode->i_mode) &&
- bindex > dstart && bindex < dend)) {
+ if (unlikely(!d_deleted((struct dentry *) dentry) &&
+ inode &&
+ !(inode && S_ISDIR(inode->i_mode) &&
+ bindex > dstart && bindex < dend))) {
PRINT_CALLER(fname, fxn, line);
printk(" CD2: dentry/lower=%p:%p(%p) "
"bindex=%d dstart/end=%d:%d\n",
@@ -190,7 +191,7 @@ void __unionfs_check_dentry(const struct dentry *dentry,
for (bindex = sbstart(sb); bindex < sbmax(sb); bindex++) {
lower_mnt = unionfs_lower_mnt_idx(dentry, bindex);
if (lower_mnt) {
- if (bindex < dstart || bindex > dend) {
+ if (unlikely(bindex < dstart || bindex > dend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CM0: dentry/lmnt=%p:%p bindex=%d "
"dstart/end=%d:%d\n", dentry,
@@ -204,9 +205,9 @@ void __unionfs_check_dentry(const struct dentry *dentry,
* start/end range. Ignore this rule,
* however, if this is a NULL dentry.
*/
- if (inode &&
- !(inode && S_ISDIR(inode->i_mode) &&
- bindex > dstart && bindex < dend)) {
+ if (unlikely(inode &&
+ !(inode && S_ISDIR(inode->i_mode) &&
+ bindex > dstart && bindex < dend))) {
PRINT_CALLER(fname, fxn, line);
printk(" CM1: dentry/lmnt=%p:%p "
"bindex=%d dstart/end=%d:%d\n",
@@ -223,30 +224,30 @@ void __unionfs_check_dentry(const struct dentry *dentry,
istart = ibstart(inode);
iend = ibend(inode);
BUG_ON(istart > iend);
- if ((istart == -1 && iend != -1) ||
- (istart != -1 && iend == -1)) {
+ if (unlikely((istart == -1 && iend != -1) ||
+ (istart != -1 && iend == -1))) {
PRINT_CALLER(fname, fxn, line);
printk(" CI0: dentry/inode=%p:%p istart/end=%d:%d\n",
dentry, inode, istart, iend);
}
- if (istart != dstart) {
+ if (unlikely(istart != dstart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CI1: dentry/inode=%p:%p istart=%d dstart=%d\n",
dentry, inode, istart, dstart);
}
- if (iend != dend) {
+ if (unlikely(iend != dend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CI2: dentry/inode=%p:%p iend=%d dend=%d\n",
dentry, inode, iend, dend);
}

if (!S_ISDIR(inode->i_mode)) {
- if (dend != dstart) {
+ if (unlikely(dend != dstart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CI3: dentry/inode=%p:%p dstart=%d dend=%d\n",
dentry, inode, dstart, dend);
}
- if (iend != istart) {
+ if (unlikely(iend != istart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CI4: dentry/inode=%p:%p istart=%d iend=%d\n",
dentry, inode, istart, iend);
@@ -256,12 +257,12 @@ void __unionfs_check_dentry(const struct dentry *dentry,
for (bindex = sbstart(sb); bindex < sbmax(sb); bindex++) {
lower_inode = unionfs_lower_inode_idx(inode, bindex);
if (lower_inode) {
- if (bindex < istart || bindex > iend) {
+ if (unlikely(bindex < istart || bindex > iend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CI5: dentry/linode=%p:%p bindex=%d "
"istart/end=%d:%d\n", dentry,
lower_inode, bindex, istart, iend);
- } else if (lower_inode == POISONED_PTR) {
+ } else if (unlikely(lower_inode == POISONED_PTR)) {
/* freed inode! */
PRINT_CALLER(fname, fxn, line);
printk(" CI6: dentry/linode=%p:%p bindex=%d "
@@ -275,8 +276,9 @@ void __unionfs_check_dentry(const struct dentry *dentry,
* b/t start/end, but NOT if at the
* start/end range.
*/
- if (!(S_ISDIR(inode->i_mode) &&
- bindex > istart && bindex < iend)) {
+ if (unlikely(!(S_ISDIR(inode->i_mode) &&
+ bindex > istart &&
+ bindex < iend))) {
PRINT_CALLER(fname, fxn, line);
printk(" CI7: dentry/linode=%p:%p "
"bindex=%d istart/end=%d:%d\n",
@@ -298,8 +300,10 @@ void __unionfs_check_dentry(const struct dentry *dentry,
lower_dentry = unionfs_lower_dentry_idx(dentry,
bindex);
lower_mnt = unionfs_lower_mnt_idx(dentry, bindex);
- if (!((lower_inode && lower_dentry && lower_mnt) ||
- (!lower_inode && !lower_dentry && !lower_mnt))) {
+ if (unlikely(!((lower_inode && lower_dentry &&
+ lower_mnt) ||
+ (!lower_inode &&
+ !lower_dentry && !lower_mnt)))) {
PRINT_CALLER(fname, fxn, line);
printk(" Cx: lmnt/ldentry/linode=%p:%p:%p "
"bindex=%d dstart/end=%d:%d\n",
@@ -308,11 +312,11 @@ void __unionfs_check_dentry(const struct dentry *dentry,
}
}
/* check if lower inode is newer than upper one (it shouldn't) */
- if (is_newer_lower(dentry)) {
+ if (unlikely(is_newer_lower(dentry))) {
PRINT_CALLER(fname, fxn, line);
for (bindex=ibstart(inode); bindex <= ibend(inode); bindex++) {
lower_inode = unionfs_lower_inode_idx(inode, bindex);
- if (!lower_inode)
+ if (unlikely(!lower_inode))
continue;
printk(" CI8: bindex=%d mtime/lmtime=%lu.%lu/%lu.%lu "
"ctime/lctime=%lu.%lu/%lu.%lu\n",
@@ -350,30 +354,30 @@ void __unionfs_check_file(const struct file *file,
fend = fbend(file);
BUG_ON(fstart > fend);

- if ((fstart == -1 && fend != -1) ||
- (fstart != -1 && fend == -1)) {
+ if (unlikely((fstart == -1 && fend != -1) ||
+ (fstart != -1 && fend == -1))) {
PRINT_CALLER(fname, fxn, line);
printk(" CF0: file/dentry=%p:%p fstart/end=%d:%d\n",
file, dentry, fstart, fend);
}
- if (fstart != dstart) {
+ if (unlikely(fstart != dstart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CF1: file/dentry=%p:%p fstart=%d dstart=%d\n",
file, dentry, fstart, dstart);
}
- if (fend != dend) {
+ if (unlikely(fend != dend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CF2: file/dentry=%p:%p fend=%d dend=%d\n",
file, dentry, fend, dend);
}
inode = dentry->d_inode;
if (!S_ISDIR(inode->i_mode)) {
- if (fend != fstart) {
+ if (unlikely(fend != fstart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CF3: file/inode=%p:%p fstart=%d fend=%d\n",
file, inode, fstart, fend);
}
- if (dend != dstart) {
+ if (unlikely(dend != dstart)) {
PRINT_CALLER(fname, fxn, line);
printk(" CF4: file/dentry=%p:%p dstart=%d dend=%d\n",
file, dentry, dstart, dend);
@@ -387,7 +391,7 @@ void __unionfs_check_file(const struct file *file,
for (bindex = sbstart(sb); bindex < sbmax(sb); bindex++) {
lower_file = unionfs_lower_file_idx(file, bindex);
if (lower_file) {
- if (bindex < fstart || bindex > fend) {
+ if (unlikely(bindex < fstart || bindex > fend)) {
PRINT_CALLER(fname, fxn, line);
printk(" CF5: file/lower=%p:%p bindex=%d "
"fstart/end=%d:%d\n",
@@ -400,8 +404,9 @@ void __unionfs_check_file(const struct file *file,
* b/t start/end, but NOT if at the
* start/end range.
*/
- if (!(S_ISDIR(inode->i_mode) &&
- bindex > fstart && bindex < fend)) {
+ if (unlikely(!(S_ISDIR(inode->i_mode) &&
+ bindex > fstart &&
+ bindex < fend))) {
PRINT_CALLER(fname, fxn, line);
printk(" CF6: file/lower=%p:%p "
"bindex=%d fstart/end=%d:%d\n",
@@ -421,12 +426,13 @@ void __unionfs_check_nd(const struct nameidata *nd,
struct file *file;
int printed_caller = 0;

- if (!nd)
+ if (unlikely(!nd))
return;
if (nd->flags & LOOKUP_OPEN) {
file = nd->intent.open.file;
- if (file->f_path.dentry &&
- strcmp(file->f_dentry->d_sb->s_type->name, "unionfs")) {
+ if (unlikely(file->f_path.dentry &&
+ strcmp(file->f_dentry->d_sb->s_type->name,
+ "unionfs"))) {
PRINT_CALLER(fname, fxn, line);
printk(" CND1: lower_file of type %s\n",
file->f_path.dentry->d_sb->s_type->name);
@@ -444,7 +450,7 @@ void __show_branch_counts(const struct super_block *sb,

printk("BC:");
for (i=0; i<sbmax(sb); i++) {
- if (sb->s_root)
+ if (likely(sb->s_root))
mnt = UNIONFS_D(sb->s_root)->lower_paths[i].mnt;
else
mnt = NULL;
@@ -461,7 +467,7 @@ void __show_inode_times(const struct inode *inode,

for (bindex=ibstart(inode); bindex <= ibend(inode); bindex++) {
lower_inode = unionfs_lower_inode_idx(inode, bindex);
- if (!lower_inode)
+ if (unlikely(!lower_inode))
continue;
printk("IT(%lu:%d): ", inode->i_ino, bindex);
printk("%s:%s:%d ",file,fxn,line);
@@ -507,14 +513,14 @@ void __show_inode_counts(const struct inode *inode,
struct inode *lower_inode;
int bindex;

- if (!inode) {
+ if (unlikely(!inode)) {
printk("SiC: Null inode\n");
return;
}
for (bindex=sbstart(inode->i_sb); bindex <= sbend(inode->i_sb);
bindex++) {
lower_inode = unionfs_lower_inode_idx(inode, bindex);
- if (!lower_inode)
+ if (unlikely(!lower_inode))
continue;
printk("SIC(%lu:%d:%d): ", inode->i_ino, bindex,
atomic_read(&(inode)->i_count));
--
1.5.2.2

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