This change is a followup to I510158843e4b1d482bdc496c2e97b1860dc1ba93. In referred change we pushed log messages about 'weird' write errors to fuse device out of sight, by reporting them at Debug loglevel instead of Error (where 'weird' means errno is not POSIX compliant but having meaningful semantics for FUSE protocol). This solved the issue of spurious error reporting. And so far so good: these messages don't indicate an error condition by themselves. However, when they come in high repetitions, that indicates a suboptimal condition which should be reported.[1] Therefore now we shall emit a Warning if a certain errno occurs a certain number of times[2] as the outcome of a write to the fuse device. ___ [1] typically ENOENTs and ENOTDIRs accumulate when glusterfs' inode invalidation lags behind the kernel's internal inode garbage collection (in this case above errnos mean that the inode which we requested to be invalidated is not found in kernel). This can be mitigated with the invalidate-limit command line / mount option, cf. bz#1732717. [2] 256, as of the current implementation. Change-Id: I8cc7fe104da43a88875f93b0db49d5677cc16045 Updates: #1000 Signed-off-by: Csaba Henk <csaba@redhat.com>
There was a critical flaw in the previous implementation of open-behind. When an open is done in the background, it's necessary to take a reference on the fd_t object because once we "fake" the open answer, the fd could be destroyed. However as long as there's a reference, the release function won't be called. So, if the application closes the file descriptor without having actually opened it, there will always remain at least 1 reference, causing a leak. To avoid this problem, the previous implementation didn't take a reference on the fd_t, so there were races where the fd could be destroyed while it was still in use. To fix this, I've implemented a new xlator cbk that gets called from fuse when the application closes a file descriptor. The whole logic of handling background opens have been simplified and it's more efficient now. Only if the fop needs to be delayed until an open completes, a stub is created. Otherwise no memory allocations are needed. Correctly handling the close request while the open is still pending has added a bit of complexity, but overall normal operation is simpler. Change-Id: I6376a5491368e0e1c283cc452849032636261592 Fixes: #1225 Signed-off-by: Xavi Hernandez <xhernandez@redhat.com>
Problem: FUSE uses failures of communicating with /dev/fuse with various errnos to indicate in-kernel conditions to userspace. Some of these shouldn't be handled as an application error. Also the standard POSIX errno description should not be shown as they are misleading in this context. Solution: When writing to the fuse device, the caller of the respective convenience routine can mask those errnos which don't qualify to be an error for the application in that context, so then those shall be reported at DEBUG level. The possible non-standard errnos are reported with their POSIX name instead of their description to avoid confusion. (Eg. for ENOENT we don't log "no such file or directory", we log indeed literal "ENOENT".) Change-Id: I510158843e4b1d482bdc496c2e97b1860dc1ba93 >updates: bz#1193929 updates: #1000 Signed-off-by: Csaba Henk <csaba@redhat.com> (cherry picked from commit 1166df1920dd9b2bd5fce53ab49d27117db40238)
Problem: tests/bugs/protocol/bug-1433815-auth-allow.t fails sometimes because of stale mount. This stale mount comes into picture when parent process dies without waiting for the child process which mounts fuse fs to die Fix: Wait for mounting child process to die before dying. Fixes: #1152 Change-Id: I8baee8720e88614fdb762ea822d5877973eef8dc Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Change-Id: Id7e003e4a53d0a0057c1c84e1cd704c80a6cb015 Fixes: bz#1744874 Signed-off-by: Csaba Henk <csaba@redhat.com>
At the moment new stack doesn't populate frame->root->unique in all cases. This makes it difficult to debug hung frames by examining successive state dumps. Fuse and server xlators populate it whenever they can, but other xlators won't be able to assign 'unique' when they need to create a new frame/stack because they don't know what 'unique' fuse/server xlators already used. What we need is for unique to be correct. If a stack with same unique is present in successive statedumps, that means the same operation is still in progress. This makes 'finding hung frames' part of debugging hung frames easier. fixes bz#1714098 Change-Id: I3e9a8f6b4111e260106c48a2ac3a41ef29361b9e Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
In scenarios where a mount fails before creating log file, doesn't make sense to give message to 'check log file'. See below: ``` ERROR: failed to create logfile "/var/log/glusterfs/mnt.log" (No space left on device) ERROR: failed to open logfile /var/log/glusterfs/mnt.log Mount failed. Please check the log file for more details. ``` Fixes: bz#1688068 Change-Id: I1d837caa4f9bc9f1a37780783e95007e01ae4e3f Signed-off-by: Amar Tumballi <amarts@redhat.com>
This patch fixed coverity issue in fuse-bridge.c. CID : 1398630 : Resource leak CID : 1399757 : Uninitialized pointer read updates: bz#789278 Change-Id: I69f8591400ee56a5d215eeac443a8e3d7777db27 Signed-off-by: Sunny Kumar <sunkumar@redhat.com>
updates bz#1193929 Change-Id: I55ffa8f086ad9570f2526d91c196d7de9ffe6add Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
This patch fixes memory leak reported by ASan.
Tracebacks:
ERROR: LeakSanitizer: detected memory leaks
Direct leak of 712 byte(s) in 1 object(s) allocated from:
#0 0x7f35139dc848 in __interceptor_malloc (/lib64/libasan.so.5+0xef848)
#1 0x7f35136efb29 in __gf_malloc ../libglusterfs/src/mem-pool.c:136
#2 0x7f3510591ce9 in fuse_thread_proc ../xlators/mount/fuse/src/fuse-bridge.c:5929
#3 0x7f351336d58d in start_thread (/lib64/libpthread.so.0+0x858d)
SUMMARY: AddressSanitizer: 712 byte(s) leaked in 1 allocation(s).
updates: bz#1633930
Change-Id: Ie5b4da6b338d8e5fc770c5b2da1238e3462468ac
Signed-off-by: Sunny Kumar <sunkumar@redhat.com>