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hw/9pfs: Read-only support for 9p export

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A new fsdev parameter "readonly" is introduced to control accessing 9p export.
"readonly" can be used to specify the access type. By default "rw" access
is given to 9p export.

Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
This commit is contained in:
M. Mohan Kumar 2011-10-25 12:10:39 +05:30 • committed by Aneesh Kumar K.V
parent f02b77c9bf
commit 2c74c2cb4b
6 changed files with 78 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

4
fsdev/file-op-9p.h
View file

@ -56,10 +56,12 @@ typedef struct extended_ops {
* On failure ignore the error.
*/
#define V9FS_SM_NONE 0x00000010
#define V9FS_RDONLY 0x00000020
#define V9FS_SEC_MASK 0x0000001C
typedef struct FsContext
{
uid_t uid;

7
fsdev/qemu-fsdev.c
View file

@ -35,7 +35,7 @@ int qemu_fsdev_add(QemuOpts *opts)
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");
bool ro = qemu_opt_get_bool(opts, "readonly", 0);
if (!fsdev_id) {
fprintf(stderr, "fsdev: No id specified\n");
@ -86,6 +86,11 @@ int qemu_fsdev_add(QemuOpts *opts)
fsle->fse.export_flags |= V9FS_IMMEDIATE_WRITEOUT;
}
}
if (ro) {
fsle->fse.export_flags |= V9FS_RDONLY;
} else {
fsle->fse.export_flags &= ~V9FS_RDONLY;
}
if (strcmp(fsdriver, "local")) {
goto done;