[FUSE] cow: stats.txt -> stats

3 files changed, 18 insertions, 15 deletions

diff --git a/.github/workflows/test-cow-fuse.yml b/.github/workflows/test-cow-fuse.yml
index 9b42532..46b6933 100644
--- a/.github/workflows/test-cow-fuse.yml
+++ b/.github/workflows/test-cow-fuse.yml
@@ -146,6 +146,6 @@ jobs:
             /mnt/work/logs/randomLog1.out \
             /mnt/work/logs/randomTestLog1.out \
             /mnt/work/logs/randomLog2.out \
-            /mnt/work/tmp/status.txt \
+            /mnt/work/tmp/status \
             ${{ github.workspace }}/build/src/server/dnbd3.log \
             ${{ github.workspace }}/../cow_server/cow_merger_service/publish/log.out
diff --git a/src/fuse/cowDoc/readme.md b/src/fuse/cowDoc/readme.md
index 2b752bb..51a0052 100644
--- a/src/fuse/cowDoc/readme.md
+++ b/src/fuse/cowDoc/readme.md
@@ -24,12 +24,12 @@ A typical use case is updating or adding software to an existing image.
 - `- L <path>` Similar to `-c <path>`, but instead of creating a new session, an existing one is loaded from the specified path.
 - `-m` the client requests a merge after the image has been unmounted and all changes have been uploaded.
 
-- `--cowStatFile` creates a status file at the same location as the data and meta file. The file contains information about the current session, for more information see [here](#status).
-- `--cowStatStdout` similar to `--cowStatFile` but the information will be printed in the stdout.
+- `--cow-stats-file` creates a status file at the same location as the data and meta file. The file contains information about the current session, for more information see [here](#status).
+- `--cow-stats-stdout` similar to `--cow-stats-file` but the information will be printed in the stdout.
 
 Example parameters for creating a new cow session:
 ```
-./dnbd3-fuse "/home/user/VMs/mount" -f -h localhost -i imagename -c "/home/user/temp" -C "192.168.178.20:5000" --cowStatStdout -m
+./dnbd3-fuse "/home/user/VMs/mount" -f -h localhost -i imagename -c "/home/user/temp" -C "192.168.178.20:5000" --cow-stats-stdout -m
 
 ```
 
@@ -117,11 +117,11 @@ There are two different limits for the number of parallel uploads in the [config
 
 ## Files
 
-When a new CoW session is started, a new `meta`, `data` and, if so set in the command line arguments, a `status.txt` file is created.
+When a new CoW session is started, a new `meta`, `data` and, if so set in the command line arguments, a `status` file is created.
 
 ### status
 
-The file `status.txt` can be activated with the command line parameter `--cowStatFile`.
+The file `status` can be activated with the command line parameter `--cow-stats-file`.
 
 The file will contain the following:
 
@@ -147,9 +147,9 @@ It is `done` when the image has been unmounted and all clusters have been upload
 - `ulspeed` the current upload speed in kb/s.
 
 Once all clusters have been uploaded, the status is set to `done`.
-If you define `COW_DUMP_BLOCK_UPLOADS`, a list of all clusters, sorted by the number of uploads, is copied to the status.txt file after the cluster upload is completed.
+If you define `COW_DUMP_BLOCK_UPLOADS`, a list of all clusters, sorted by the number of uploads, is copied to the status file after the cluster upload is completed.
 
-With the command line parameter `--cowStatStdout` the same output of the stats file will be printed in stdout.
+With the command line parameter `--cow-stats-stdout` the same output of the stats file will be printed in stdout.
 
 ### meta
 
@@ -231,7 +231,7 @@ The following configuration variables have been added to `config/cow.h`.
 - `COW_MIN_UPLOAD_DELAY` sets the minimum time in seconds that must have elapsed since the last change to a cow cluster before it is uploaded.
 This value can be fine-tuned. A larger value usually reduces redundant uploading of clusters.
 A smaller value reduces the time for the final upload after the image has been unmounted.
-If you set `COW_DUMP_BLOCK_UPLOADS` and set the command line parameter `--cowStatFile`, then a list of all clusters, sorted by the number of uploads, will be written to the status.txt file after the cluster upload is complete.
+If you set `COW_DUMP_BLOCK_UPLOADS` and set the command line parameter `--cow-stats-file`, then a list of all clusters, sorted by the number of uploads, will be written to the status file after the cluster upload is complete.
 This can help in fine-tuning `COW_MIN_UPLOAD_DELAY`.
 - `COW_STATS_UPDATE_TIME` defines the update frequency of the stdout output/statistics file in seconds. Setting it too low could affect performance as a loop runs over all clusters.
 - `COW_MAX_PARALLEL_BACKGROUND_UPLOADS` defines the maximum number of parallel cluster uploads. This number is used when the image is still mounted and the user is still using it.
diff --git a/src/fuse/cowfile.c b/src/fuse/cowfile.c
index b183202..525eef0 100644
--- a/src/fuse/cowfile.c
+++ b/src/fuse/cowfile.c
@@ -424,9 +424,10 @@ static void dumpBlockUploads()
 	}
 	qsort( blockUploads, currentBlock, sizeof( cow_cluster_statistics_t ), cmpfunc );
 
-	dprintf( cow.fdStats, "\n\nclusterNumber: uploads\n==Block Upload Dump===\n" );
+	dprintf( cow.fdStats, "\n\n[BlockStats]\n" );
 	for ( uint64_t i = 0; i < currentBlock; i++ ) {
-		dprintf( cow.fdStats, "%" PRIu64 ": %" PRIu64 " \n", blockUploads[i].clusterNumber, blockUploads[i].uploads );
+		dprintf( cow.fdStats, "%" PRIu64 "=%" PRIu64 " \n",
+				blockUploads[i].clusterNumber, blockUploads[i].uploads );
 	}
 }
 #endif
@@ -454,6 +455,7 @@ static void updateCowStatsFile( uint64_t inQueue, uint64_t modified, uint64_t id
 
 	int len = snprintf( buffer, sizeof buffer,
 			"[General]\n"
+			"uuid=%s\n"
 			"state=%s\n"
 			"inQueue=%" PRIu64 "\n"
 			"modifiedClusters=%" PRIu64 "\n"
@@ -461,6 +463,7 @@ static void updateCowStatsFile( uint64_t inQueue, uint64_t modified, uint64_t id
 			"totalClustersUploaded=%" PRIu64 "\n"
 			"activeUploads=%i\n"
 			"%s%s\n",
+			metadata->uuid,
 			state, inQueue, modified, idle, totalBlocksUploaded, activeUploads,
 			COW_SHOW_UL_SPEED ? "avgSpeedKb=" : "",
 			speedBuffer );
@@ -478,12 +481,12 @@ static void updateCowStatsFile( uint64_t inQueue, uint64_t modified, uint64_t id
 		// Pad with a bunch of newlines so we don't change the file size all the time
 		ssize_t extra = MIN( 20, (ssize_t)sizeof(buffer) - len - 1 );
 		memset( buffer + len, '\n', extra );
-		lseek( cow.fdStats, 43, SEEK_SET );
-		if ( write( cow.fdStats, buffer, len + extra ) != len + extra ) {
+		if ( pwrite( cow.fdStats, buffer, len + extra, 0 ) != len + extra ) {
 			logadd( LOG_WARNING, "Could not update cow status file" );
 		}
 #ifdef COW_DUMP_BLOCK_UPLOADS
 		if ( !uploadLoop && uploadLoopDone ) {
+			lseek( cow.fdStats, len + extra, SEEK_SET );
 			dumpBlockUploads();
 		}
 #endif
@@ -883,10 +886,10 @@ static bool createCowStatsFile( char *path )
 {
 	char pathStatus[strlen( path ) + 12];
 
-	snprintf( pathStatus, strlen( path ) + 12, "%s%s", path, "/status.txt" );
+	snprintf( pathStatus, strlen( path ) + 12, "%s%s", path, "/status" );
 
 	char buffer[100];
-	int len = snprintf( buffer, 100, "uuid=%s\nstate: active\n", metadata->uuid );
+	int len = snprintf( buffer, 100, "[General]\nuuid=%s\nstate=active\n", metadata->uuid );
 	if ( statStdout ) {
 		logadd( LOG_INFO, "%s", buffer );
 	}