[CIFS] [CIFS] Do not take rename sem on most path based calls (during
building of full path) to avoid hang rename/readdir hang
Reported by Alan Tyson
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 1d0ca3e..3830dfeb 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -139,9 +139,7 @@
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -316,9 +314,7 @@
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
if(full_path == NULL)
rc = -ENOMEM;
else if (pTcon->ses->capabilities & CAP_UNIX) {
diff --git a/fs/cifs/fcntl.c b/fs/cifs/fcntl.c
index ec4dfe9..633a938 100644
--- a/fs/cifs/fcntl.c
+++ b/fs/cifs/fcntl.c
@@ -86,9 +86,7 @@
cifs_sb = CIFS_SB(file->f_dentry->d_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&file->f_dentry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(file->f_dentry);
- mutex_unlock(&file->f_dentry->d_sb->s_vfs_rename_mutex);
if(full_path == NULL) {
rc = -ENOMEM;
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 5c497c5..1476725 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -203,9 +203,7 @@
}
}
- mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(file->f_dentry);
- mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
if (full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 957ddd1..4093764 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -722,9 +722,7 @@
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
if (full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -807,9 +805,7 @@
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
if (full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -1141,9 +1137,7 @@
rc = 0;
}
- mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
if (full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 9562f5b..2ec99f8 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -48,10 +48,8 @@
/* No need to check for cross device links since server will do that
BB note DFS case in future though (when we may have to check) */
- mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
fromName = build_path_from_dentry(old_file);
toName = build_path_from_dentry(direntry);
- mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
if((fromName == NULL) || (toName == NULL)) {
rc = -ENOMEM;
goto cifs_hl_exit;
@@ -103,9 +101,7 @@
xid = GetXid();
- mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
if (!full_path)
goto out_no_free;
@@ -164,9 +160,7 @@
cifs_sb = CIFS_SB(inode->i_sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
diff --git a/fs/cifs/readdir.c b/fs/cifs/readdir.c
index 2f6e282..7b8591a 100644
--- a/fs/cifs/readdir.c
+++ b/fs/cifs/readdir.c
@@ -404,9 +404,7 @@
if(pTcon == NULL)
return -EINVAL;
- mutex_lock(&file->f_dentry->d_sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(file->f_dentry);
- mutex_unlock(&file->f_dentry->d_sb->s_vfs_rename_mutex);
if(full_path == NULL) {
return -ENOMEM;
diff --git a/fs/cifs/xattr.c b/fs/cifs/xattr.c
index 3938444..7754d64 100644
--- a/fs/cifs/xattr.c
+++ b/fs/cifs/xattr.c
@@ -62,9 +62,7 @@
cifs_sb = CIFS_SB(sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -116,9 +114,7 @@
cifs_sb = CIFS_SB(sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -223,9 +219,7 @@
cifs_sb = CIFS_SB(sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
@@ -341,9 +335,7 @@
cifs_sb = CIFS_SB(sb);
pTcon = cifs_sb->tcon;
- mutex_lock(&sb->s_vfs_rename_mutex);
full_path = build_path_from_dentry(direntry);
- mutex_unlock(&sb->s_vfs_rename_mutex);
if(full_path == NULL) {
FreeXid(xid);
return -ENOMEM;
