From 708b4818f2d0b9a1e277de85a00a0355745a5cd0 Mon Sep 17 00:00:00 2001
From: Miklos Szeredi <miklos@szeredi.hu>
Date: Sat, 30 Sep 2006 16:02:25 +0000
Subject: bmap support

---
 lib/fuse.c          | 24 ++++++++++++++++++++++++
 lib/fuse_lowlevel.c | 21 +++++++++++++++++++++
 lib/mount.c         |  2 ++
 3 files changed, 47 insertions(+)

(limited to 'lib')

diff --git a/lib/fuse.c b/lib/fuse.c
index 14789b7..0e3e1d1 100644
--- a/lib/fuse.c
+++ b/lib/fuse.c
@@ -2371,6 +2371,29 @@ static void fuse_setlk(fuse_req_t req, fuse_ino_t ino,
     reply_err(req, err);
 }
 
+static void fuse_bmap(fuse_req_t req, fuse_ino_t ino, size_t blocksize,
+                      uint64_t idx)
+{
+    struct fuse *f = req_fuse_prepare(req);
+    char *path;
+    int err;
+
+    err = -ENOENT;
+    pthread_rwlock_rdlock(&f->tree_lock);
+    path = get_path(f, ino);
+    if (path != NULL) {
+        err = -ENOSYS;
+        if (f->op.bmap)
+            err = f->op.bmap(path, blocksize, &idx);
+        free(path);
+    }
+    pthread_rwlock_unlock(&f->tree_lock);
+    if (!err)
+        fuse_reply_bmap(req, idx);
+    else
+        reply_err(req, err);
+}
+
 static struct fuse_lowlevel_ops fuse_path_ops = {
     .init = fuse_data_init,
     .destroy = fuse_data_destroy,
@@ -2405,6 +2428,7 @@ static struct fuse_lowlevel_ops fuse_path_ops = {
     .removexattr = fuse_removexattr,
     .getlk = fuse_getlk,
     .setlk = fuse_setlk,
+    .bmap = fuse_bmap,
 };
 
 static void free_cmd(struct fuse_cmd *cmd)
diff --git a/lib/fuse_lowlevel.c b/lib/fuse_lowlevel.c
index f014e6e..8ea6779 100644
--- a/lib/fuse_lowlevel.c
+++ b/lib/fuse_lowlevel.c
@@ -403,6 +403,16 @@ int fuse_reply_lock(fuse_req_t req, struct flock *lock)
     return send_reply_ok(req, &arg, sizeof(arg));
 }
 
+int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
+{
+    struct fuse_bmap_out arg;
+
+    memset(&arg, 0, sizeof(arg));
+    arg.block = idx;
+
+    return send_reply_ok(req, &arg, sizeof(arg));
+}
+
 static void do_lookup(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
     char *name = (char *) inarg;
@@ -907,6 +917,16 @@ static struct fuse_req *check_interrupt(struct fuse_ll *f, struct fuse_req *req)
         return NULL;
 }
 
+static void do_bmap(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
+{
+    struct fuse_bmap_in *arg = (struct fuse_bmap_in *) inarg;
+
+    if (req->f->op.bmap)
+        req->f->op.bmap(req, nodeid, arg->blocksize, arg->block);
+    else
+        fuse_reply_err(req, ENOSYS);
+}
+
 static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
 {
     struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
@@ -1040,6 +1060,7 @@ static struct {
     [FUSE_ACCESS]      = { do_access,      "ACCESS"      },
     [FUSE_CREATE]      = { do_create,      "CREATE"      },
     [FUSE_INTERRUPT]   = { do_interrupt,   "INTERRUPT"   },
+    [FUSE_BMAP]        = { do_bmap,        "BMAP"        },
 };
 
 #define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
diff --git a/lib/mount.c b/lib/mount.c
index 8ac9787..2ed0381 100644
--- a/lib/mount.c
+++ b/lib/mount.c
@@ -49,6 +49,8 @@ static const struct fuse_opt fuse_mount_opts[] = {
     FUSE_OPT_KEY("allow_other",         KEY_KERN),
     FUSE_OPT_KEY("allow_root",          KEY_ALLOW_ROOT),
     FUSE_OPT_KEY("nonempty",            KEY_KERN),
+    FUSE_OPT_KEY("blkdev",              KEY_KERN),
+    FUSE_OPT_KEY("blksize=",            KEY_KERN),
     FUSE_OPT_KEY("default_permissions", KEY_KERN),
     FUSE_OPT_KEY("fsname=",             KEY_KERN),
     FUSE_OPT_KEY("large_read",          KEY_KERN),
-- 
cgit v1.2.3