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path: root/hw/9pfs/virtio-9p-local.c
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2014-03-04hw/9pfs: use g_strdup_printf() instead of PATH_MAX limitationChen Gang1-100/+187
When path is truncated by PATH_MAX limitation, it causes QEMU to access incorrect file. So use original full path instead of PATH_MAX within 9pfs (need check/process ENOMEM for related memory allocation). The related test: - Environments (for qemu-devel): - Host is under fedora17 desktop with ext4fs: qemu-system-x86_64 -hda test.img -m 1024 \ -net nic,vlan=4,model=virtio,macaddr=00:16:35:AF:94:04 \ -net tap,vlan=4,ifname=tap4,script=no,downscript=no \ -device virtio-9p-pci,id=fs0,fsdev=fsdev0,mount_tag=hostshare \ -fsdev local,security_model=passthrough,id=fsdev0,\ path=/upstream/vm/data/share/1234567890abcdefghijklmnopqrstuvwxyz\ ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890acdefghijklmnopqrstuvwxyz\ ABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890/111111111111111111111111111\ 1111111111111111111111111111111111111111111111111111222222222222\ 2222222222222222222222222222222222222222222222222222222222222222\ 2222222222222222222222222222222222233333333333333333333333333333\ 3333333333333333333333333333333333 - Guest is ubuntu12 server with 9pfs. mount -t 9p -o trans=virtio,version=9p2000.L hostshare /share - Limitations: full path limitation is PATH_MAX (4096B include nul) under Linux. file/dir node name maximized length is 256 (include nul) under ext4. - Special test: Under host, modify the file: "/upstream/vm/data/share/1234567890abcdefg\ hijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890acdefghijklmno\ pqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890/111111111111111111111\ 111111111111111111111111111111111111111111111111111111111122222222222\ 222222222222222222222222222222222222222222222222222222222222222222222\ 222222222222222222222222222222233333333333333333333333333333333333333\ 3333333333333333333333333/4444444444444444444444444444444444444444444\ 444444444444444444444444444444444444444444444444444444444444444444444\ 444444444444444444444444444444444444444444444444444444444444444444444\ 444444444444444444444444444444444444444/55555555555555555555555555555\ 555555555555555555555555555555555555555555555555555555555555555555555\ 555555555555555555555555555555555555555555555555555555555555555555555\ 555555555555555555555555555555555555555555555555555555555555555555555\ 55555555/666666666666666666666666666666666666666666666666666666666666\ 666666666666666666666666666666666666666666666666666666666666666666666\ 666666666666666666666666666666666666666666666666666666666666666666666\ 666666666666666666666/77777777777777777777777777777777777777777777777\ 777777777777777777777777777777777777777777777777777777777777777777777\ 777777777777777777777777777777777777777777777777777777777777777777777\ 77777777777777777777777777777777777777777777777777777777777/888888888\ 888888888888888888888888888888888888888888888888888888888888888888888\ 888888888888888888888888888888888888888888888888888888888888888888888\ 888888888888888888888888888888888888888888888888888888888888888888888\ 888888888/99999999999999999999999999999999999999999999999999999999999\ 999999999999999999999999999999999999999999999999999999999999999999999\ 999999999999999999999999999999999999999999999999999999999999999999999\ 99999999999999999999999999999999999999999/000000000000000000000000000\ 000000000000000000000000000000000000000000000000000000000000000000000\ 000000000000000000000000000000000000000000000000000000000000000000000\ 000000000000000000000000000000000000000000000000/aaaaaaaaaaaaaaaaaaaa\ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\ aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa/bbbbbbbbbbbbbbbbbbbbbbb\ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb\ bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb/ccccccccc\ ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\ ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\ ccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccccc\ cccccccccc/dddddddddddddddddddddddddddddddddddddddddddddddddddddddddd\ ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd\ ddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd\ dddddddddddddddddddddd/eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee\ eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee\ eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee\ eeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee/fffffffffffffff\ fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\ fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff\ ffffffffffffffffffffffffffffffffffffffffffffffffffffffffff/gggggggggg\ ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg\ ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg\ ggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggggg\ ggggggggggggggggggggggg/iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii\ iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii\ iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii\ iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii/jjjjjjjjjjjjj\ jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj\ jjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjjj/ppppppppppppppppppppp\ ppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp\ ppppppppppppppppppppppppppppppppppppppp/test1234567890file.log" (need enter dir firstly, then modify file, or can not open it). Under guest, still allow modify "test1234567890file.log" (will generate "test123456" file with contents). After apply this patch, can not open "test1234567890file.log" under guest (permission denied). - Common test: All are still OK after apply this path. "mkdir -p", "create/open file/dir", "modify file/dir", "rm file/dir". change various mount point paths under host and/or guest. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-03-03hw/9pfs/virtio-9p-local.c: use snprintf() instead of sprintf()Chen Gang1-3/+4
'ctx->fs_root' + 'path'/'fullname.data' may be larger than PATH_MAX, so need use snprintf() instead of sprintf() just like another area have done in 9pfs. This could possibly result in the truncation of pathname, which we address in the follow up patch. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-03-03hw/9pfs/virtio-9p-local.c: move v9fs_string_free() to below "err_out:"Chen Gang1-1/+1
When "goto err_out", 'v9fs_string' already was allocated, so still need free 'v9fs_string' before return. Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-02-02hw/9pfs: make get_st_gen() return ENOTTY error on special filesKirill A. Shutemov1-1/+2
Currently we silently ignore getversion requests for anything except file or directory. Let's instead return ENOTTY error to indicate that getversion is not supported. It makes implementation consistent on all not-supported cases. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2014-02-02hw/9pfs: fix error handing in local_ioc_getversion()Kirill A. Shutemov1-3/+4
v9fs_co_st_gen() expects to see error code in errno, not in return code. Let's fix this. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2013-05-28hw/9pfs: Use O_NOFOLLOW when opening files on serverAneesh Kumar K.V1-7/+41
9p server should never follow a symlink. So use O_NOFOLLOW with all open syscall Tested-by: "M. Mohan Kumar" <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2013-05-28hw/9pfs: use O_NOFOLLOW for mapped readlink operationAneesh Kumar K.V1-1/+1
With mapped security models like mapped-xattr and mapped-file, we save the symlink target as file contents. Now if we ever expose a normal directory with mapped security model and find real symlinks in export path, never follow them and return proper error. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2013-05-12remove double semicolonsDong Xu Wang1-1/+1
Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2013-04-08hw: move headers to include/Paolo Bonzini1-1/+1
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-01-30hw/9pfs: Fix unchecked strdup() by converting to g_strdup()Markus Armbruster1-4/+4
Note: the allocation in virtio_9p_init() is still leaked. To be fixed in a followup commit. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2012-12-19misc: move include files to include/qemu/Paolo Bonzini1-1/+1
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-01-30hw/9pfs: Preserve S_ISGIDM. Mohan Kumar1-3/+4
In passthrough security model in local fs driver, after a file creation chown and chmod are done to set the file credentials and mode as requested by 9p client. But if there was a request to create a file with S_ISGID bit, doing chown on that file resets the S_ISGID bit. So first call chown and then invoking chmod with proper mode bit retains the S_ISGID (if present/requested) This resulted in LTP mknod02, mknod03, mknod05, open10 test case failures. This patch fixes this issue. man 2 chown When the owner or group of an executable file are changed by an unprivileged user the S_ISUID and S_ISGID mode bits are cleared. POSIX does not specify whether this also should happen when root does the chown(); the Linux behavior depends on the kernel version. Signed-off-by: M. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-19hw/9pfs: Add new security model mapped-file.Aneesh Kumar K.V1-4/+346
This enable us to do passthrough equivalent security model on NFS directory. NFS server mostly do root squashing and don't support xattr. Hence we cannot use 'passthrough' or 'mapped' security model Also added "mapped-xattr" security to indicate earlier "mapped" security model Older name is still supported. POSIX rules regarding ctime update on chmod are not followed by this security model. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2012-01-04hw/9pfs: Move opt validation to FsDriver callbackAneesh Kumar K.V1-0/+34
This remove all conditional code from common code path and make opt validation a FSDriver callback. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-12-04hw/9pfs: Use the correct file descriptor in Fsdriver CallbackAneesh Kumar K.V1-10/+26
Fsdriver callback that operate on file descriptor need to differentiate between directory fd and file fd. Based on the original patch from Sassan Panahinejad <sassan@sassan.me.uk> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-11-289pfs: improve portability to older systemsAneesh Kumar K.V1-1/+6
I guess we can also make sure we don't call local_ioc_getversion at all. Reported-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-11-289pfs: improve portability to older systemsPaolo Bonzini1-2/+5
Small requirements on "new" features have percolated to virtio-9p-local.c. In particular, the utimensat wrapper actually only supports dirfd = AT_FDCWD and flags = AT_SYMLINK_NOFOLLOW in the fallback code. Remove the arguments so that virtio-9p-local.c will not use AT_* constants. At the same time, fail local_ioc_getversion if the ioctl is not supported by the host. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-11-09configure: fix detection for xattr.h on modern distributionsAvi Kivity1-1/+1
Modern distributions place xattr.h in /usr/include/sys, and fold libattr.so into libc. They also don't have an ENOATTR. Make configure detect this, and add a qemu-xattr.h file that directs the #include to the right place. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-10-31hw/9pfs: Abstract open state of fid to V9fsFidOpenStateAneesh Kumar K.V1-41/+59
To implement synthetic file system in Qemu we may not really require file descriptor and Dir *. Make generic code use V9fsFidOpenState instead. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-31hw/9pfs: Fix error handling in local_mknodAneesh Kumar K.V1-8/+5
Update local_chown to remove unnecessary if loop Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-15hw/9pfs: Use export flag for indicating security modelAneesh Kumar K.V1-26/+26
This helps to remove some of the structure members Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-15hw/9pfs: Use export_flag for indicating whether fs driver use path names.Aneesh Kumar K.V1-1/+1
This allows us to remove another member from the struct Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-15hw/9pfs: Add st_gen support in getattr replyHarsh Prateek Bora1-1/+53
This patch use file system specific ioctl for getting i_generation value. Not all file system support the ioctl. So we add an export specific extended operation and assign right callback for the file system that support i_generation ioctl ["M. Mohan Kumar" <mohan@in.ibm.com> we can do ioctl only for regular files and directories on the server] Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-10-12hw/9pfs: Add new virtfs option writeout=immediate skip host page cacheAneesh Kumar K.V1-2/+16
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>
2011-09-22hw/9pfs: Add fs driver specific details to fscontextAneesh Kumar K.V1-0/+1
Add a new context flag PATHNAME_FSCONTEXT and indicate whether the fs driver track fid using path names. Also add a private pointer that help us to track fs driver specific values in there Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-09-22hw/9pfs: Add init callback to fs driverAneesh Kumar K.V1-1/+6
This call back can be used to do fs driver specific initialization. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-09-22hw/9pfs: Move fid pathname tracking to seperate data type.Aneesh Kumar K.V1-40/+165
This enables us to add handles to track fids later. The V9fsPath added is similar to V9fsString except that the size include the NULL byte also. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-08-22use readdir_r instead of readdir for reentrancyHarsh Prateek Bora1-3/+4
Signed-off-by: Harsh Prateek Bora <harsh@linux.vnet.ibm.com> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
2011-06-01[virtio-9p] Make rpath thread safeVenkateswararao Jujjuri (JV)1-71/+64
Current rpath inline function is heavily used in all system calls. This function has a static buffer making it a non-thread safe function. This patch introduces new thread-safe routine and makes use of it. Signed-off-by: Venkateswararao Jujjuri "<jvrao@linux.vnet.ibm.com>
2011-06-01virtio-9p: Use relative includes for files in hwStefan Weil1-1/+2
Commit 353ac78d495ef976242abd868f68d78420861c2c moved the files without fixing the include paths. It used a modified CFLAGS to add hw to the include search path, but this breaks builds where the user wants to set special CFLAGS. Long include paths also increase compilation time. Therefore this patch removes the special CFLAGS for virtio and fixes the include statements by using relative include paths. v2: Remove special CFLAGS. v3: Update needed for latest QEMU. Signed-off-by: Stefan Weil <weil@mail.berlios.de> Signed-off-by: Venkateswararao Jujjuri (JV) <jvrao@linux.vnet.ibm.com>
2011-04-27hw/virtio-9p-local.c: Remove unnecessary null char in symlink fileHarsh Prateek Bora1-1/+1
This patch removes the addition of null char in symlink file which is being appended to file in case of mapped security model. Without this patch, the extra null char causes LTP testcase lstat03 to fail and hence this fix is required. Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
2011-04-27virtio-9p: move 9p files aroundAneesh Kumar K.V1-0/+563
Now that we start adding more files related to 9pfs it make sense to move them to a separate directory Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Venkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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