[cadcdev-svn-commits] [SCM] branch master updated. e89ecd7b4aff0547687d602c57728337352db2d5

[Lawrence S. <ljs...@us...>]

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- Log -----------------------------------------------------------------
commit e89ecd7b4aff0547687d602c57728337352db2d5
Author: Lawrence Sebald <ljs...@us...>
Date:   Wed Apr 24 14:12:14 2013 -0400

    Add the fs_ext2_sync() function to sync all changes to the block device.

-----------------------------------------------------------------------

Summary of changes:
 addons/include/ext2/fs_ext2.h |   24 +++++++++++++++++++-----
 addons/libkosext2fs/fs_ext2.c |   27 +++++++++++++++++++++++++++
 2 files changed, 46 insertions(+), 5 deletions(-)

diff --git a/addons/include/ext2/fs_ext2.h b/addons/include/ext2/fs_ext2.h
index 2722af5..e0803de 100644
--- a/addons/include/ext2/fs_ext2.h
+++ b/addons/include/ext2/fs_ext2.h
@@ -1,7 +1,7 @@
 /* KallistiOS ##version##
 
    ext2/fs_ext2.h
-   Copyright (C) 2012 Lawrence Sebald
+   Copyright (C) 2012, 2013 Lawrence Sebald
 */
 
 #ifndef __EXT2_FS_EXT2_H
@@ -103,10 +103,6 @@ int fs_ext2_shutdown(void);
     \param  flags       Mount flags. Bitwise OR of values from ext2_mount_flags
     \retval 0           On success.
     \retval -1          On error.
-
-    \note               All filesystems will currently be mounted as read-only,
-                        regardless of the flags value. The lower-level ext2fs
-                        code does not support writing at this time.
 */
 int fs_ext2_mount(const char *mp, kos_blockdev_t *dev, uint32_t flags);
 
@@ -121,5 +117,23 @@ int fs_ext2_mount(const char *mp, kos_blockdev_t *dev, uint32_t flags);
 */
 int fs_ext2_unmount(const char *mp);
 
+/** \brief  Sync an ext2 filesystem, flushing all pending writes to the block
+            device.
+
+    This function completes all pending writes on the filesystem, making sure
+    all data and metadata are in a consistent state on the block device. As both
+    inode and block writes are normally postponed until they are either evicted
+    from the cache or the filesystem is unmounted, doing this periodically may
+    be a good idea if there is a chance that the filesystem will not be
+    unmounted cleanly.
+
+    \param  mp          The mount point of the filesystem to be synced.
+    \retval 0           On success.
+    \retval -1          On error.
+
+    \note   This function has no effect if the filesystem was mounted read-only.
+*/
+int fs_ext2_sync(const char *mp);
+
 __END_DECLS
 #endif /* !__EXT2_FS_EXT2_H */
diff --git a/addons/libkosext2fs/fs_ext2.c b/addons/libkosext2fs/fs_ext2.c
index bdc4f7c..cd452b6 100644
--- a/addons/libkosext2fs/fs_ext2.c
+++ b/addons/libkosext2fs/fs_ext2.c
@@ -1453,6 +1453,33 @@ int fs_ext2_unmount(const char *mp) {
     return rv;
 }
 
+int fs_ext2_sync(const char *mp) {
+    fs_ext2_fs_t *i;
+    int found = 0, rv = 0;
+
+    /* Find the fs in question */
+    mutex_lock(&ext2_mutex);
+    LIST_FOREACH(i, &ext2_fses, entry) {
+        if(!strcmp(mp, i->vfsh->nmmgr.pathname)) {
+            found = 1;
+            break;
+        }
+    }
+
+    if(found) {
+        /* ext2_fs_sync() will set errno if there's a problem. */
+        rv = ext2_fs_sync(i->fs);
+    }
+    else {
+        errno = ENOENT;
+        rv = -1;
+    }
+
+    mutex_unlock(&ext2_mutex);
+    return rv;
+}
+    
+
 int fs_ext2_init(void) {
     if(initted)
         return 0;


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