path: root/vmblock.patch

diff --git a/vmblock/Makefile b/vmblock/Makefile
index bbfe225..8ec1a86 100644
--- a/vmblock/Makefile
+++ b/vmblock/Makefile
@@ -43,7 +43,11 @@ INCLUDE      += -I$(SRCROOT)/shared
 endif
 
 
+ifdef KVERSION
+VM_UNAME = $(KVERSION)
+else
 VM_UNAME = $(shell uname -r)
+endif
 
 # Header directory for the running kernel
 ifdef LINUXINCLUDE
diff --git a/vmblock/Makefile.kernel b/vmblock/Makefile.kernel
index ab7a727..e3ec9d2 100644
--- a/vmblock/Makefile.kernel
+++ b/vmblock/Makefile.kernel
@@ -19,7 +19,7 @@
 
 INCLUDE += -I$(SRCROOT)/include
 
-EXTRA_CFLAGS := $(CC_OPTS) $(INCLUDE)
+EXTRA_CFLAGS := $(CC_OPTS) $(INCLUDE) $(LINUXINCLUDE)
 
 EXTRA_CFLAGS += $(call vm_check_build, $(AUTOCONF_DIR)/cachecreate.c, -DVMW_KMEMCR_HAS_DTOR, )
 EXTRA_CFLAGS += $(call vm_check_build, $(AUTOCONF_DIR)/cachector.c,   -DVMW_KMEMCR_CTOR_HAS_3_ARGS, )
diff --git a/vmblock/linux/control.c b/vmblock/linux/control.c
index 79716bd..5b6acb2 100644
--- a/vmblock/linux/control.c
+++ b/vmblock/linux/control.c
@@ -208,9 +208,17 @@ SetupProcDevice(void)
    VMBlockSetProcEntryOwner(controlProcMountpoint);
 
    /* Create /proc/fs/vmblock/dev */
+   // create_proc_entry deprecated in 3.10
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3,10,0)
+   controlProcEntry = proc_create(VMBLOCK_CONTROL_DEVNAME,
+                                  VMBLOCK_CONTROL_MODE,
+                                  controlProcDirEntry,
+                                  &ControlFileOps);
+#else
    controlProcEntry = create_proc_entry(VMBLOCK_CONTROL_DEVNAME,
                                         VMBLOCK_CONTROL_MODE,
                                         controlProcDirEntry);
+#endif
    if (!controlProcEntry) {
       Warning("SetupProcDevice: could not create " VMBLOCK_DEVICE "\n");
       remove_proc_entry(VMBLOCK_CONTROL_MOUNTPOINT, controlProcDirEntry);
@@ -218,7 +226,9 @@ SetupProcDevice(void)
       return -EINVAL;
    }
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) //Maybe 3.14? 3.13?
    controlProcEntry->proc_fops = &ControlFileOps;
+#endif
    return 0;
 }
 
@@ -272,17 +282,50 @@ CleanupProcDevice(void)
  *----------------------------------------------------------------------------
  */
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 13, 0)
+/* copy-paste from Lustre FS by pavlinux */
+static inline char *ll_getname(const char __user *filename)
+{
+       int ret = 0, len;
+       char *tmp = __getname();
+
+       if (!tmp)
+               return ERR_PTR(-ENOMEM);
+
+       len = strncpy_from_user(tmp, filename, PATH_MAX);
+       if (len == 0)
+               ret = -ENOENT;
+       else if (len > PATH_MAX)
+               ret = -ENAMETOOLONG;
+
+       if (ret) {
+               __putname(tmp);
+               tmp =  ERR_PTR(ret);
+       }
+       return tmp;
+};
+#endif
+
 static int
 ExecuteBlockOp(const char __user *buf,                // IN: buffer with name
                const os_blocker_id_t blocker,         // IN: blocker ID (file)
                int (*blockOp)(const char *filename,   // IN: block operation
                               const os_blocker_id_t blocker))
 {
-   char *name;
+   struct filename *fn = NULL;
+   char *name = (char *)fn->name;
    int i;
    int retval;
 
-   name = getname(buf);
+   // Not sure what changed in 3.13 to neccessitate this.
+   // Gentoo uses __getname(), though.
+   // https://github.com/gentoo/vmware/blob/master/app-emulation/vmware-modules/files/308-3.10-02-control.patch#L36
+   // ~MK
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 13, 0)
+   name = (char *)getname(buf);
+#else
+   name = (char *)ll_getname(buf);
+#endif
    if (IS_ERR(name)) {
       return PTR_ERR(name);
    }
@@ -293,7 +336,13 @@ ExecuteBlockOp(const char __user *buf,                // IN: buffer with name
 
    retval = i < 0 ? -EINVAL : blockOp(name, blocker);
 
-   putname(name);
+   // I'm not sure what this does, but you seem to know what you're doing ~MK
+   if (fn->name != fn->iname) { /* add by pavlinux */
+       __putname(fn->name);
+        kvfree(fn);
+   } else {
+       __putname(fn);
+   }
 
    return retval;
 }
diff --git a/vmblock/linux/dentry.c b/vmblock/linux/dentry.c
index 05ea95a..1245358 100644
--- a/vmblock/linux/dentry.c
+++ b/vmblock/linux/dentry.c
@@ -32,7 +32,13 @@
 #include "block.h"
 
 
-static int DentryOpRevalidate(struct dentry *dentry, struct nameidata *nd);
+// From what I can tell, this should've always been an unsigned int?
+static int DentryOpRevalidate(struct dentry *dentry,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0) // Maybe 3.14 or 3.13?
+                              struct nameidata *nd);
+#else
+                              unsigned int flags);
+#endif
 
 struct dentry_operations LinkDentryOps = {
    .d_revalidate = DentryOpRevalidate,
@@ -60,7 +66,11 @@ struct dentry_operations LinkDentryOps = {
 
 static int
 DentryOpRevalidate(struct dentry *dentry,  // IN: dentry revalidating
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
                    struct nameidata *nd)   // IN: lookup flags & intent
+#else
+                   unsigned int flags)     // IN: lookup flags & intent
+#endif
 {
    VMBlockInodeInfo *iinfo;
    struct nameidata actualNd;
@@ -101,7 +111,11 @@ DentryOpRevalidate(struct dentry *dentry,  // IN: dentry revalidating
    if (actualDentry &&
        actualDentry->d_op &&
        actualDentry->d_op->d_revalidate) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(3, 10, 0)
+      return actualDentry->d_op->d_revalidate(actualDentry, flags);
+#else
       return actualDentry->d_op->d_revalidate(actualDentry, nd);
+#endif
    }
 
    if (compat_path_lookup(iinfo->name, 0, &actualNd)) {
diff --git a/vmblock/linux/file.c b/vmblock/linux/file.c
index d7ac1f6..c5e6604 100644
--- a/vmblock/linux/file.c
+++ b/vmblock/linux/file.c
@@ -39,6 +39,7 @@ typedef ino_t inode_num_t;
 #endif
 
 /* Specifically for our filldir_t callback */
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
 typedef struct FilldirInfo {
    filldir_t filldir;
    void *dirent;
@@ -76,6 +77,7 @@ Filldir(void *buf,              // IN: Dirent buffer passed from FileOpReaddir
    /* Specify DT_LNK regardless */
    return info->filldir(info->dirent, name, namelen, offset, ino, DT_LNK);
 }
+#endif
 
 
 /* File operations */
@@ -132,7 +134,12 @@ FileOpOpen(struct inode *inode,  // IN
     * and that would try to acquire the inode's semaphore; if the two inodes
     * are the same we'll deadlock.
     */
+   // f_dentry is defined as f_path.dentry until 3.19
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,19,0)
    if (actualFile->f_dentry && inode == actualFile->f_dentry->d_inode) {
+#else
+   if (actualFile->f_path.dentry && inode == actualFile->f_path.dentry->d_inode) {
+#endif
       Warning("FileOpOpen: identical inode encountered, open cannot succeed.\n");
       if (filp_close(actualFile, current->files) < 0) {
          Warning("FileOpOpen: unable to close opened file.\n");
@@ -164,13 +171,20 @@ FileOpOpen(struct inode *inode,  // IN
  *----------------------------------------------------------------------------
  */
 
+// pavlinux's patch completely removes this bit for kernels older than 3.13
 static int
 FileOpReaddir(struct file *file,  // IN
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
               void *dirent,       // IN
               filldir_t filldir)  // IN
+#else
+              struct dir_context* ctx) //IN
+#endif
 {
    int ret;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
    FilldirInfo info;
+#endif
    struct file *actualFile;
 
    if (!file) {
@@ -184,12 +198,20 @@ FileOpReaddir(struct file *file,  // IN
       return -EINVAL;
    }
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
    info.filldir = filldir;
    info.dirent = dirent;
 
    actualFile->f_pos = file->f_pos;
    ret = vfs_readdir(actualFile, Filldir, &info);
    file->f_pos = actualFile->f_pos;
+#else
+   /* Ricky Wong Yung Fei:
+    * Manipulation of pos is now handled internally by iterate_dir().
+    */
+   ret = iterate_dir(actualFile, ctx);
+   file->f_pos = actualFile->f_pos;
+#endif
 
    return ret;
 }
@@ -236,8 +258,15 @@ FileOpRelease(struct inode *inode, // IN
 }
 
 
+// pavlinux's patch drops FileOpReaddr for < 3.13
+// pavlinux's patch sets .owner = THIS_MODULE and .llseek = no_llseek
 struct file_operations RootFileOps = {
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,11,0)
    .readdir = FileOpReaddir,
+#else
+   .iterate = FileOpReaddir,
+#endif
+   .owner   = THIS_MODULE,
    .open    = FileOpOpen,
    .release = FileOpRelease,
 };
diff --git a/vmblock/linux/inode.c b/vmblock/linux/inode.c
index 098c94c..7aed6e7 100644
--- a/vmblock/linux/inode.c
+++ b/vmblock/linux/inode.c
@@ -28,20 +28,32 @@
 #include <linux/fs.h>
 #include <linux/time.h>
 #include <linux/namei.h>
+#include <linux/cred.h>
 
 #include "vmblockInt.h"
 #include "filesystem.h"
 #include "block.h"
 
 
 /* Inode operations */
+// Again, it looks like last arg should've always been unsigned int ~MK
 static struct dentry *InodeOpLookup(struct inode *dir,
-                                    struct dentry *dentry, struct nameidata *nd);
-static int InodeOpReadlink(struct dentry *dentry, char __user *buffer, int buflen);
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
-static void *InodeOpFollowlink(struct dentry *dentry, struct nameidata *nd);
+                                    struct dentry *dentry,
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0) // Maybe 3.12 or 3.13?
+                                    struct nameidata *nd);
 #else
+                                    unsigned int flags);
+#endif
+static int InodeOpReadlink(struct dentry *dentry, char __user *buffer, int buflen);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 13)
 static int InodeOpFollowlink(struct dentry *dentry, struct nameidata *nd);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+static const char *InodeOpGetLink(struct dentry *dentry, struct inode *inode,
+                                  struct delayed_call *done);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 99)
+static const char *InodeOpFollowlink(struct dentry *dentry, void **cookie);
+#else
+static void *InodeOpFollowlink(struct dentry *dentry, struct nameidata *nd);
 #endif
 
 
@@ -49,9 +60,13 @@ struct inode_operations RootInodeOps = {
    .lookup = InodeOpLookup,
 };
 
-static struct inode_operations LinkInodeOps = {
+struct inode_operations LinkInodeOps = {
    .readlink    = InodeOpReadlink,
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+   .get_link = InodeOpGetLink,
+#else
    .follow_link = InodeOpFollowlink,
+#endif
 };
 
 
@@ -75,7 +90,11 @@ static struct inode_operations LinkInodeOps = {
 static struct dentry *
 InodeOpLookup(struct inode *dir,      // IN: parent directory's inode
               struct dentry *dentry,  // IN: dentry to lookup
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3,10,0)
               struct nameidata *nd)   // IN: lookup intent and information
+#else
+              unsigned int flags)     // IN: lookup intent and information
+#endif
 {
    char *filename;
    struct inode *inode;
@@ -135,7 +154,12 @@ InodeOpLookup(struct inode *dir,      // IN: parent directory's inode
    inode->i_size = INODE_TO_IINFO(inode)->nameLen;
    inode->i_version = 1;
    inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 10, 0)
    inode->i_uid = inode->i_gid = 0;
+#else
+   inode->i_gid = make_kgid(current_user_ns(), 0);
+   inode->i_uid = make_kuid(current_user_ns(), 0);
+#endif
    inode->i_op = &LinkInodeOps;
 
    d_add(dentry, inode);
@@ -176,8 +200,15 @@ InodeOpReadlink(struct dentry *dentry,  // IN : dentry of symlink
    if (!iinfo) {
       return -EINVAL;
    }
-
+#if LINUX_VERSION_CODE <= KERNEL_VERSION(3, 14, 99)
    return vfs_readlink(dentry, buffer, buflen, iinfo->name);
+#elif LINUX_VERSION_CODE <= KERNEL_VERSION(4, 6, 99)
+   return readlink_copy(buffer, buflen, iinfo->name);
+#elif LINUX_VERSION_CODE <= KERNEL_VERSION(4, 9, 99)
+   return generic_readlink(dentry, buffer, buflen);
+#else
+   return vfs_readlink(dentry, buffer, buflen);
+#endif
 }
 
 
@@ -198,30 +229,58 @@ InodeOpReadlink(struct dentry *dentry,  // IN : dentry of symlink
  *----------------------------------------------------------------------------
  */
 
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
-static void *
+static
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 13)
+int
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 99)
+const char *
 #else
-static int
+void *
 #endif
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+InodeOpGetLink(struct dentry *dentry, struct inode *inode,
+               struct delayed_call *done)
+#else
 InodeOpFollowlink(struct dentry *dentry,  // IN : dentry of symlink
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 99)
+                  void **cookie)
+#else
                   struct nameidata *nd)   // OUT: stores result
+#endif
+#endif
 {
    int ret;
    VMBlockInodeInfo *iinfo;
 
    if (!dentry) {
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+      ret = -ECHILD;
+#else
       Warning("InodeOpReadlink: invalid args from kernel\n");
       ret = -EINVAL;
+#endif
       goto out;
    }
 
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+   iinfo = INODE_TO_IINFO(inode);
+#else
    iinfo = INODE_TO_IINFO(dentry->d_inode);
+#endif
    if (!iinfo) {
       ret = -EINVAL;
       goto out;
    }
 
+#if LINUX_VERSION_CODE < KERNEL_VERSION(3, 12, 0)
    ret = vfs_follow_link(nd, iinfo->name);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 4, 99)
+   return (char *)(iinfo->name);
+#elif LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 99)
+   return *cookie = (char *)(iinfo->name);
+#else
+   nd_set_link(nd, iinfo->name);
+#endif
 
 out:
 #if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 13)
diff --git a/vmblock/shared/compat_namei.h b/vmblock/shared/compat_namei.h
index f82dd49..426d40b 100644
--- a/vmblock/shared/compat_namei.h
+++ b/vmblock/shared/compat_namei.h
@@ -45,4 +45,20 @@
 #define compat_path_lookup(name, flags, nd)     path_lookup(name, flags, nd)
 #endif
 
+/* nameidata struct for 4.2+ */
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(4,2,0)
+struct nameidata {  
+   struct path    path;  
+   struct qstr    last;  
+   struct path    root;  
+   struct inode   *inode;  /* path.dentry.d_inode */  
+   unsigned int   flags;  
+   unsigned       seq, m_seq;  
+   int            last_type;  
+   unsigned       depth;  
+   struct file    *base;  
+   char           *saved_names[MAX_NESTED_LINKS + 1];  
+};
+#endif
+
 #endif /* __COMPAT_NAMEI_H__ */