- 10 9月, 2010 13 次提交
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由 Stefan Hajnoczi 提交于
It is often useful to instrument memory management functions in order to find leaks or performance problems. This patch adds trace events for the memory allocation primitives. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
This patch adds LTTng Userspace Tracer (UST) backend support. The UST system requires no kernel support but libust and liburcu must be installed. $ ./configure --trace-backend ust $ make Start the UST daemon: $ ustd & List available tracepoints and enable some: $ ustctl --list-markers $(pgrep qemu) [...] {PID: 5458, channel/marker: ust/paio_submit, state: 0, fmt: "acb %p opaque %p sector_num %lu nb_sectors %lu type %lu" 0x4b32ba} $ ustctl --enable-marker "ust/paio_submit" $(pgrep qemu) Run the trace: $ ustctl --create-trace $(pgrep qemu) $ ustctl --start-trace $(pgrep qemu) [...] $ ustctl --stop-trace $(pgrep qemu) $ ustctl --destroy-trace $(pgrep qemu) Trace results can be viewed using lttv-gui. More information about UST: http://lttng.org/ustSigned-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Check for LTTng Userspace Tracer headers When using the 'ust' backend, check if the relevant headers are available at host. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Prerna Saxena 提交于
This patch adds an optional command line switch '-trace' to specify the filename to write traces to, when qemu starts. Eg, If compiled with the 'simple' trace backend, [temp@system]$ qemu -trace FILENAME IMAGE Allows the binary traces to be written to FILENAME instead of the option set at config-time. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
This patch adds the trace-file command: trace-file [on|off|flush] Open, close, or flush the trace file. If no argument is given, the status of the trace file is displayed. The trace file is turned on by default but is only written out when the trace buffer becomes full. The flush operation can be used to force write out at any time. Turning off the trace file does not change the state of trace events; tracing will continue to the trace buffer. When the trace file is off, use "info trace" to display the contents of the trace buffer in memory. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> This commit also contains the trace-file sub-command from the following commit: commit 5ce8d1a957afae2c52ad748944ce72848ccf57bd Author: Prerna Saxena <prerna@linux.vnet.ibm.com> Date: Wed Aug 4 16:23:54 2010 +0530 trace: Add options to specify trace file name at startup and runtime This patch adds an optional command line switch '-trace' to specify the filename to write traces to, when qemu starts. Eg, If compiled with the 'simple' trace backend, [temp@system]$ qemu -trace FILENAME IMAGE Allows the binary traces to be written to FILENAME instead of the option set at config-time. Also, this adds monitor sub-command 'set' to trace-file commands to dynamically change trace log file at runtime. Eg, (qemu)trace-file set FILENAME This allows one to set trace outputs to FILENAME from the default specified at startup. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Prerna Saxena 提交于
Allow users to specify a file for trace-outputs at configuration. Also, allow trace files to be annotated by <pid> so each qemu instance has unique traces. The trace file name can be passed as a config option: --trace-file=/path/to/file (Default: trace ) At runtime, the pid of the qemu process is appended to the filename so that mutiple qemu instances do not have overlapping logs. Eg : trace-1234 for qemu launched with pid 1234. I have yet to test this on windows. getpid() is used at many places in code(including vnc.c), so I'm hoping this would be okay too. Edited-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
Sometimes it is useful to disable a trace event. Removing the event from trace-events is not enough since source code will call the trace_*() function for the event. This patch makes it easy to build without specific trace events by marking them disabled in trace-events: disable multiwrite_cb(void *mcb, int ret) "mcb %p ret %d" This builds without the multiwrite_cb trace event. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Allow bulk enabling/disabling of trace events at compile time For 'simple' trace backend, allow bulk enabling/disabling of trace events at compile time. Trace events that are preceded by 'disable' keyword are compiled in, but turned off by default. These can individually be turned on using the monitor. All other trace events are enabled by default. TODO : This could be enhanced when the trace-event namespace is partitioned into a group and an ID within that group. In such a case, marking a group as enabled would automatically enable all trace-events listed under it. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Prerna Saxena 提交于
This patch adds support for dynamically enabling/disabling of trace events. This is done by internally maintaining each trace event's state, and permitting logging of data from a trace event only if it is in an 'active' state. Monitor commands added : 1) info trace-events : to view all available trace events and their state. 2) trace-event NAME on|off : to enable/disable data logging from a given trace event. Eg, trace-event paio_submit off disables logging of data when paio_submit is hit. By default, all trace-events are disabled. One can enable desired trace-events via the monitor. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Monitor command 'info trace' Monitor command 'info trace' to display contents of trace buffer Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Remove monitor.h dependency from simpletrace User-mode targets don't have a monitor so the simple trace backend currently does not build on those targets. This patch abstracts the monitor printing interface so there is no direct coupling between simpletrace and the monitor. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
This patch adds a simple tracer which produces binary trace files. To try out the simple backend: $ ./configure --trace-backend=simple $ make After running QEMU you can pretty-print the trace: $ ./simpletrace.py trace-events trace.log The output of simpletrace.py looks like this: qemu_realloc 0.699 ptr=0x24363f0 size=0x3 newptr=0x24363f0 qemu_free 0.768 ptr=0x24363f0 ^ ^---- timestamp delta (us) |____ trace event name Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com> trace: Make trace record fields 64-bit Explicitly use 64-bit fields in trace records so that timestamps and magic numbers work for 32-bit host builds. Includes fixes from Prerna Saxena <prerna@linux.vnet.ibm.com>. Signed-off-by: NPrerna Saxena <prerna@linux.vnet.ibm.com> Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Stefan Hajnoczi 提交于
This patch introduces the trace-events file where trace events can be declared like so: qemu_malloc(size_t size) "size %zu" qemu_free(void *ptr) "ptr %p" These trace event declarations are processed by a new tool called tracetool to generate code for the trace events. Trace event declarations are independent of the backend tracing system (LTTng User Space Tracing, ftrace markers, DTrace). The default "nop" backend generates empty trace event functions. Therefore trace events are disabled by default. The trace-events file serves two purposes: 1. Adding trace events is easy. It is not necessary to understand the details of a backend tracing system. The trace-events file is a single location where trace events can be declared without code duplication. 2. QEMU is not tightly coupled to one particular backend tracing system. In order to support tracing across QEMU host platforms and to anticipate new backend tracing systems that are currently maturing, it is important to be flexible and not tied to one system. This commit includes fixes from Prerna Saxena <prerna@linux.vnet.ibm.com> and Blue Swirl <blauwirbel@gmail.com>. Signed-off-by: NStefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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由 Edgar E. Iglesias 提交于
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@petalogix.com>
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由 Stefan Weil 提交于
Symbols with a size of 0 are unusable for the disassembler. Example: While running an arm linux kernel, no symbolic names are used in qemu.log when the cpu is executing an assembler function. Assume that the size of such symbols is the difference to the next symbol value. Signed-off-by: NStefan Weil <weil@mail.berlios.de> Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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由 Blue Swirl 提交于
Fix this warning: CC savevm.o /src/qemu/savevm.c: In function `do_savevm': /src/qemu/savevm.c:1900: warning: passing arg 1 of `localtime_r' from incompatible pointer type It looks like on OpenBSD the type of tv_sec in struct timeval is still 'long' instead of time_t as in most other OS. Fix by adding a cast. Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>
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- 09 9月, 2010 27 次提交
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由 Edgar E. Iglesias 提交于
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@petalogix.com>
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由 Edgar E. Iglesias 提交于
Missing: * fcmp.un insn * Denormalized exceptions * Exception model is not accurate Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@petalogix.com>
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由 Edgar E. Iglesias 提交于
Signed-off-by: NEdgar E. Iglesias <edgar.iglesias@petalogix.com>
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由 Anthony Liguori 提交于
This reverts commit 79368c81. Conflicts: block.c I haven't been able to come up with a solution yet for the corruption caused by unaligned requests from the IDE disk so revert until a solution can be written. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Anthony Liguori 提交于
This reverts commit 13b7fdef. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Anthony Liguori 提交于
This reverts commit cfb207e6. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>
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由 Anthony Liguori 提交于
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由 Anthony Liguori 提交于
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由 Anthony Liguori 提交于
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由 Sripathi Kodi 提交于
This patch applies on top of 9P2000.L patches that we have on the list. I took a look at how 9P server is handling open() flags in 9P2000.L path. I think we can do away with the valid_flags() function and simplify the code. The reasoning is as follows: O_NOCTTY: (If the file is a terminal, don't make it the controlling terminal of the process even though the process does not have a controlling terminal) By the time the control reaches 9P client it is clear that what we have is not a terminal device. Hence it does not matter what we do with this flag. In any case 9P server can filter this flag out before making the syscall. O_NONBLOCK: (Don't block if i) Can't read/write to the file ii) Can't get locks) This has an impact on FIFOs, but also on file locks. Hence we can pass it down to the system call. O_ASYNC: From the manpage: O_ASYNC Enable signal-driven I/O: generate a signal (SIGIO by default, but this can be changed via fcntl(2)) when input or output becomes pos- sible on this file descriptor. This feature is only available for terminals, pseudo-terminals, sockets, and (since Linux 2.6) pipes and FIFOs. See fcntl(2) for further details. Again, this does not make any impact on regular files handled by 9P. Also, we don't want 9P server to receive SIGIO. Hence I think 9P server can filter this flag out before making the syscall. O_CLOEXEC: This flag makes sense only on the client. If guest user space sets this flag the guest VFS will take care of calling close() on the fd if an exec() happens. Hence 9P client need not be bothered with this flag. Also I think QEMU will not do an exec, but if it does, it makes sense to close these fds. Hence we can pass this flag down to the syscall. O_CREAT: Since we are in open() path it means we have confirmed that the file exists. Hence there is no need to pass O_CREAT flag down to the system. In fact on some versions of glibc this causes problems, because we pass O_CREAT flag, but don't have permission bits. Hence we can just mask this flag out. So in summary: Mask out: O_NOCTTY O_ASYNC O_CREAT Pass-through: O_NONBLOCK O_CLOEXEC Signed-off-by: NSripathi Kodi <sripathik@in.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 Arun R Bharadwaj 提交于
Signed-off-by: NArun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 Arun R Bharadwaj 提交于
Signed-off-by: NArun R Bharadwaj <arun@linux.vnet.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
The arguments are wrong. Use qemu_mallocz directly Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
We should always use functions which don't follow symlink on the server Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
This is equivalent to SM_PASSTHROUGH security model. The only exception is, failure of privilige operation like chown are ignored. This makes a passthrough like security model usable for people who runs kvm as non root Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
With mapped security mode we use "user.virtfs" namespace is used to store the virtFs related attributes. So hide it from user. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
TXATTRCREATE: Prepare a fid for setting xattr value on a file system object. size[4] TXATTRCREATE tag[2] fid[4] name[s] attr_size[8] flags[4] size[4] RXATTRWALK tag[2] txattrcreate gets a fid pointing to xattr. This fid can later be used to get set the xattr value. flag value is derived from set Linux setxattr. The manpage says "The flags parameter can be used to refine the semantics of the operation. XATTR_CREATE specifies a pure create, which fails if the named attribute exists already. XATTR_REPLACE specifies a pure replace operation, which fails if the named attribute does not already exist. By default (no flags), the extended attribute will be created if need be, or will simply replace the value if the attribute exists." The actual setxattr operation happens when the fid is clunked. At that point the written byte count and the attr_size specified in TXATTRCREATE should be same otherwise an error will be returned. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
TXATTRWALK: Descend a ATTR namespace size[4] TXATTRWALK tag[2] fid[4] newfid[4] name[s] size[4] RXATTRWALK tag[2] size[8] txattrwalk gets a fid pointing to xattr. This fid can later be used to get read the xattr value. If name is NULL the fid returned can be used to get the list of extended attribute associated to the file system object. Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 Aneesh Kumar K.V 提交于
We want to add type specific operation during read/write Signed-off-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
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由 M. Mohan Kumar 提交于
Implement 9p2000.L version of open(LOPEN) interface in qemu 9p server. For LOPEN, no need to convert the flags to and from 9p mode to VFS mode. Synopsis: size[4] Tlopen tag[2] fid[4] mode[4] size[4] Rlopen tag[2] qid[13] iounit[4] Current qemu 9p server does not support following flags: O_NOCTTY, O_NONBLOCK, O_ASYNC & O_CLOEXEC [Fix mode format - jvrao@linux.vnet.ibm.com] Signed-off-by: NM. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 M. Mohan Kumar 提交于
size[4] Trename tag[2] fid[4] newdirfid[4] name[s] size[4] Rrename tag[2] Implement the 2000.L rename operation. A new function v9fs_complete_rename is introduced that acts as a common entry point for 2000.L rename operation and 2000.U rename opearation (via wstat). As part of this change the field 'nname' (used only for rename) is removed from the structure V9fsWstatState. Instead a new structure V9fsRenameState is used for rename operations both by 2000.U and 2000.L code paths. Both 2000.U and 2000.L rename code paths construct the V9fsRenameState structure and passes that to v9fs_complete_rename function. Changes from previous version: Use qemu_mallocz to initialize Use strcpy,strcat functions instead of memcpy Changed the variable name to newdirfid Introduced post rename function Error checking Removed nname field from V9fsWstatState Signed-off-by: NM. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 M. Mohan Kumar 提交于
Synopsis size[4] Tmkdir tag[2] fid[4] name[s] mode[4] gid[4] size[4] Rmkdir tag[2] qid[13] Description mkdir asks the file server to create a directory with given name, mode and gid. The qid for the new directory is returned with the mkdir reply message. Note: 72 is selected as the opcode for TMKDIR from the reserved list. Signed-off-by: NM. Mohan Kumar <mohan@in.ibm.com> [jvrao@linux.vnet.ibm.com: Fix perm handling when creating directory] Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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由 M. Mohan Kumar 提交于
Implement TMKNOD as part of 2000.L Work Synopsis size[4] Tmknod tag[2] fid[4] name[s] mode[4] major[4] minor[4] gid[4] size[4] Rmknod tag[2] qid[13] Description mknod asks the file server to create a device node with given device type, mode and gid. The qid for the new device node is returned with the mknod reply message. Signed-off-by: NM. Mohan Kumar <mohan@in.ibm.com> Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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SYNOPSIS size[4] Tlcreate tag[2] fid[4] name[s] flags[4] mode[4] gid[4] size[4] Rlcreate tag[2] qid[13] iounit[4] DESCRIPTION The Tlreate request asks the file server to create a new regular file with the name supplied, in the directory (dir) represented by fid. The mode argument specifies the permissions to use. New file is created with the uid if the fid and with supplied gid. The flags argument represent Linux access mode flags with which the caller is requesting to open the file with. Protocol allows all the Linux access modes but it is upto the server to allow/disallow any of these acess modes. If the server doesn't support any of the access mode, it is expected to return error. To start with we will not restricit/limit any Linux flags on this server. If needed, We can start restricting as we move forward with various use cases. Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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This patch implements creating a symlink for TSYMLINK request and responds with RSYMLINK. In the case of error, we return RERROR. SYNOPSIS size[4] Tsymlink tag[2] fid[4] name[s] symtgt[s] gid[4] size[4] Rsymlink tag[2] qid[13] DESCRIPTION Create a symbolic link named 'name' pointing to 'symtgt'. gid represents the effective group id of the caller. The permissions of a symbolic link are irrelevant hence it is omitted from the protocol. Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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Create a Hardlink. SYNOPSIS size[4] Tlink tag[2] dfid[4] oldfid[4] newpath[s] size[4] Rlink tag[2] DESCRIPTION Create a link 'newpath' in directory pointed by dfid linking to oldfid path. Signed-off-by: NVenkateswararao Jujjuri <jvrao@linux.vnet.ibm.com>
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