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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-10-12 19:11:23 +0530
committerAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2011-10-12 19:11:23 +0530
commitd3ab98e6919e9491f8ed7ffe37af73d35a55e1ca (patch)
tree0e805d6c9a58229dbc51f92b3ff3ee9d430e1c02 /fsdev
parent5745e38afeaa15153c2209674fe37e1cbdd65707 (diff)
downloadqemu-arm-d3ab98e6919e9491f8ed7ffe37af73d35a55e1ca.tar.gz
hw/9pfs: Add new virtfs option writeout=immediate skip host page cache
writeout=immediate implies the after pwritev we do a sync_file_range. Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Diffstat (limited to 'fsdev')
-rw-r--r--fsdev/file-op-9p.h4
-rw-r--r--fsdev/qemu-fsdev.c10
-rw-r--r--fsdev/qemu-fsdev.h1
3 files changed, 13 insertions, 2 deletions
diff --git a/fsdev/file-op-9p.h b/fsdev/file-op-9p.h
index 8de8abfd5b..af3ecbecb7 100644
--- a/fsdev/file-op-9p.h
+++ b/fsdev/file-op-9p.h
@@ -53,12 +53,16 @@ struct xattr_operations;
/* FsContext flag values */
#define PATHNAME_FSCONTEXT 0x1
+/* export flags */
+#define V9FS_IMMEDIATE_WRITEOUT 0x1
+
typedef struct FsContext
{
int flags;
char *fs_root;
SecModel fs_sm;
uid_t uid;
+ int export_flags;
struct xattr_operations **xops;
/* fs driver specific data */
void *private;
diff --git a/fsdev/qemu-fsdev.c b/fsdev/qemu-fsdev.c
index 768819f575..946bad7998 100644
--- a/fsdev/qemu-fsdev.c
+++ b/fsdev/qemu-fsdev.c
@@ -34,6 +34,8 @@ int qemu_fsdev_add(QemuOpts *opts)
const char *fstype = qemu_opt_get(opts, "fstype");
const char *path = qemu_opt_get(opts, "path");
const char *sec_model = qemu_opt_get(opts, "security_model");
+ const char *writeout = qemu_opt_get(opts, "writeout");
+
if (!fsdev_id) {
fprintf(stderr, "fsdev: No id specified\n");
@@ -72,10 +74,14 @@ int qemu_fsdev_add(QemuOpts *opts)
fsle->fse.path = g_strdup(path);
fsle->fse.security_model = g_strdup(sec_model);
fsle->fse.ops = FsTypes[i].ops;
-
+ fsle->fse.export_flags = 0;
+ if (writeout) {
+ if (!strcmp(writeout, "immediate")) {
+ fsle->fse.export_flags = V9FS_IMMEDIATE_WRITEOUT;
+ }
+ }
QTAILQ_INSERT_TAIL(&fstype_entries, fsle, next);
return 0;
-
}
FsTypeEntry *get_fsdev_fsentry(char *id)
diff --git a/fsdev/qemu-fsdev.h b/fsdev/qemu-fsdev.h
index e04931a58d..3b2feb4643 100644
--- a/fsdev/qemu-fsdev.h
+++ b/fsdev/qemu-fsdev.h
@@ -41,6 +41,7 @@ typedef struct FsTypeEntry {
char *fsdev_id;
char *path;
char *security_model;
+ int export_flags;
FileOperations *ops;
} FsTypeEntry;