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Date: Sat, 6 Nov 2010 18:47:09 +0100
From: Alessio Igor Bogani <abogani@...ware.it>
To: Jan Kara <jack@...e.cz>, Arnd Bergmann <arnd@...db.de>
Cc: Christoph Hellwig <hch@...radead.org>,
Tim Bird <tim.bird@...sony.com>,
LKML <linux-kernel@...r.kernel.org>,
Alessio Igor Bogani <abogani@...ware.it>
Subject: [PATCH 2/4] udf: Remove unnecessary bkl usages
The udf_lookup, udf_create, udf_mknod, udf_mkdir, udf_rmdir, udf_link,
udf_unlink and udf_readdir functions seems already adequately protected
by i_mutex held by VFS invoking calls. The udf_rename function instead
should be already protected by lock_rename again by VFS.
The udf_get_parent, udf_count_free_bitmap, udf_count_free_table and
udf_put_super functions don't require any protection.
This work was supported by a hardware donation from the CE Linux Forum.
Signed-off-by: Alessio Igor Bogani <abogani@...ware.it>
---
fs/udf/dir.c | 5 -----
fs/udf/namei.c | 26 --------------------------
fs/udf/super.c | 12 ------------
3 files changed, 0 insertions(+), 43 deletions(-)
diff --git a/fs/udf/dir.c b/fs/udf/dir.c
index 51552bf..eb8bfe2 100644
--- a/fs/udf/dir.c
+++ b/fs/udf/dir.c
@@ -30,7 +30,6 @@
#include <linux/errno.h>
#include <linux/mm.h>
#include <linux/slab.h>
-#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include "udf_i.h"
@@ -190,18 +189,14 @@ static int udf_readdir(struct file *filp, void *dirent, filldir_t filldir)
struct inode *dir = filp->f_path.dentry->d_inode;
int result;
- lock_kernel();
-
if (filp->f_pos == 0) {
if (filldir(dirent, ".", 1, filp->f_pos, dir->i_ino, DT_DIR) < 0) {
- unlock_kernel();
return 0;
}
filp->f_pos++;
}
result = do_udf_readdir(dir, filp, filldir, dirent);
- unlock_kernel();
return result;
}
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 6d8dc02..6e7c1b9 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -263,7 +263,6 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
if (dentry->d_name.len > UDF_NAME_LEN - 2)
return ERR_PTR(-ENAMETOOLONG);
- lock_kernel();
#ifdef UDF_RECOVERY
/* temporary shorthand for specifying files by inode number */
if (!strncmp(dentry->d_name.name, ".B=", 3)) {
@@ -275,7 +274,6 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
};
inode = udf_iget(dir->i_sb, lb);
if (!inode) {
- unlock_kernel();
return ERR_PTR(-EACCES);
}
} else
@@ -291,11 +289,9 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
loc = lelb_to_cpu(cfi.icb.extLocation);
inode = udf_iget(dir->i_sb, &loc);
if (!inode) {
- unlock_kernel();
return ERR_PTR(-EACCES);
}
}
- unlock_kernel();
return d_splice_alias(inode, dentry);
}
@@ -562,10 +558,8 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
int err;
struct udf_inode_info *iinfo;
- lock_kernel();
inode = udf_new_inode(dir, mode, &err);
if (!inode) {
- unlock_kernel();
return err;
}
@@ -583,7 +577,6 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
@@ -596,7 +589,6 @@ static int udf_create(struct inode *dir, struct dentry *dentry, int mode,
if (fibh.sbh != fibh.ebh)
brelse(fibh.ebh);
brelse(fibh.sbh);
- unlock_kernel();
d_instantiate(dentry, inode);
return 0;
@@ -614,7 +606,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
if (!old_valid_dev(rdev))
return -EINVAL;
- lock_kernel();
err = -EIO;
inode = udf_new_inode(dir, mode, &err);
if (!inode)
@@ -627,7 +618,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
inode->i_nlink--;
mark_inode_dirty(inode);
iput(inode);
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
@@ -646,7 +636,6 @@ static int udf_mknod(struct inode *dir, struct dentry *dentry, int mode,
err = 0;
out:
- unlock_kernel();
return err;
}
@@ -659,7 +648,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
struct udf_inode_info *dinfo = UDF_I(dir);
struct udf_inode_info *iinfo;
- lock_kernel();
err = -EMLINK;
if (dir->i_nlink >= (256 << sizeof(dir->i_nlink)) - 1)
goto out;
@@ -712,7 +700,6 @@ static int udf_mkdir(struct inode *dir, struct dentry *dentry, int mode)
err = 0;
out:
- unlock_kernel();
return err;
}
@@ -794,7 +781,6 @@ static int udf_rmdir(struct inode *dir, struct dentry *dentry)
struct kernel_lb_addr tloc;
retval = -ENOENT;
- lock_kernel();
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
goto out;
@@ -826,7 +812,6 @@ end_rmdir:
brelse(fibh.sbh);
out:
- unlock_kernel();
return retval;
}
@@ -840,7 +825,6 @@ static int udf_unlink(struct inode *dir, struct dentry *dentry)
struct kernel_lb_addr tloc;
retval = -ENOENT;
- lock_kernel();
fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
if (!fi)
goto out;
@@ -870,7 +854,6 @@ end_unlink:
brelse(fibh.sbh);
out:
- unlock_kernel();
return retval;
}
@@ -1062,15 +1045,12 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
int err;
struct buffer_head *bh;
- lock_kernel();
if (inode->i_nlink >= (256 << sizeof(inode->i_nlink)) - 1) {
- unlock_kernel();
return -EMLINK;
}
fi = udf_add_entry(dir, dentry, &fibh, &cfi, &err);
if (!fi) {
- unlock_kernel();
return err;
}
cfi.icb.extLength = cpu_to_le32(inode->i_sb->s_blocksize);
@@ -1103,7 +1083,6 @@ static int udf_link(struct dentry *old_dentry, struct inode *dir,
mark_inode_dirty(inode);
ihold(inode);
d_instantiate(dentry, inode);
- unlock_kernel();
return 0;
}
@@ -1124,7 +1103,6 @@ static int udf_rename(struct inode *old_dir, struct dentry *old_dentry,
struct kernel_lb_addr tloc;
struct udf_inode_info *old_iinfo = UDF_I(old_inode);
- lock_kernel();
ofi = udf_find_entry(old_dir, &old_dentry->d_name, &ofibh, &ocfi);
if (ofi) {
if (ofibh.sbh != ofibh.ebh)
@@ -1248,7 +1226,6 @@ end_rename:
brelse(nfibh.ebh);
brelse(nfibh.sbh);
}
- unlock_kernel();
return retval;
}
@@ -1261,7 +1238,6 @@ static struct dentry *udf_get_parent(struct dentry *child)
struct fileIdentDesc cfi;
struct udf_fileident_bh fibh;
- lock_kernel();
if (!udf_find_entry(child->d_inode, &dotdot, &fibh, &cfi))
goto out_unlock;
@@ -1273,11 +1249,9 @@ static struct dentry *udf_get_parent(struct dentry *child)
inode = udf_iget(child->d_inode->i_sb, &tloc);
if (!inode)
goto out_unlock;
- unlock_kernel();
return d_obtain_alias(inode);
out_unlock:
- unlock_kernel();
return ERR_PTR(-EACCES);
}
diff --git a/fs/udf/super.c b/fs/udf/super.c
index c05834e..0027c1f 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -2102,8 +2102,6 @@ static void udf_put_super(struct super_block *sb)
sbi = UDF_SB(sb);
- lock_kernel();
-
if (sbi->s_vat_inode)
iput(sbi->s_vat_inode);
if (sbi->s_partitions)
@@ -2119,8 +2117,6 @@ static void udf_put_super(struct super_block *sb)
kfree(sbi->s_partmaps);
kfree(sb->s_fs_info);
sb->s_fs_info = NULL;
-
- unlock_kernel();
}
static int udf_sync_fs(struct super_block *sb, int wait)
@@ -2183,8 +2179,6 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb,
uint16_t ident;
struct spaceBitmapDesc *bm;
- lock_kernel();
-
loc.logicalBlockNum = bitmap->s_extPosition;
loc.partitionReferenceNum = UDF_SB(sb)->s_partition;
bh = udf_read_ptagged(sb, &loc, 0, &ident);
@@ -2223,8 +2217,6 @@ static unsigned int udf_count_free_bitmap(struct super_block *sb,
brelse(bh);
out:
- unlock_kernel();
-
return accum;
}
@@ -2237,8 +2229,6 @@ static unsigned int udf_count_free_table(struct super_block *sb,
int8_t etype;
struct extent_position epos;
- lock_kernel();
-
epos.block = UDF_I(table)->i_location;
epos.offset = sizeof(struct unallocSpaceEntry);
epos.bh = NULL;
@@ -2248,8 +2238,6 @@ static unsigned int udf_count_free_table(struct super_block *sb,
brelse(epos.bh);
- unlock_kernel();
-
return accum;
}
--
1.7.0.4
--
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