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| author | jhb <jhb@FreeBSD.org> | 2012-03-08 20:27:20 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2012-03-08 20:27:20 +0000 |
| commit | 19feaba08bc6b84c117bd21cc71e139c6d086ed7 (patch) | |
| tree | 8f19e446f40b0494d383b5102ee060aeb4617503 /sys/kern | |
| parent | 4fea355eb2254754b2e522d87d81c5562252116a (diff) | |
| download | FreeBSD-src-19feaba08bc6b84c117bd21cc71e139c6d086ed7.zip FreeBSD-src-19feaba08bc6b84c117bd21cc71e139c6d086ed7.tar.gz | |
Add KTR_VFS traces to track modifications to a vnode's writecount.
Diffstat (limited to 'sys/kern')
| -rw-r--r-- | sys/kern/vfs_syscalls.c | 10 | ||||
| -rw-r--r-- | sys/kern/vfs_vnops.c | 7 |
2 files changed, 14 insertions, 3 deletions
diff --git a/sys/kern/vfs_syscalls.c b/sys/kern/vfs_syscalls.c index 9b7cbe4..a8bb661 100644 --- a/sys/kern/vfs_syscalls.c +++ b/sys/kern/vfs_syscalls.c @@ -4591,16 +4591,22 @@ sys_fhopen(td, uap) if (error) goto bad; - if (fmode & FWRITE) + if (fmode & FWRITE) { vp->v_writecount++; + CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d", + __func__, vp, vp->v_writecount); + } /* * end of vn_open code */ if ((error = falloc(td, &nfp, &indx, fmode)) != 0) { - if (fmode & FWRITE) + if (fmode & FWRITE) { vp->v_writecount--; + CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d", + __func__, vp, vp->v_writecount); + } goto bad; } /* An extra reference on `nfp' has been held for us by falloc(). */ diff --git a/sys/kern/vfs_vnops.c b/sys/kern/vfs_vnops.c index ce2d701..d4b60f1 100644 --- a/sys/kern/vfs_vnops.c +++ b/sys/kern/vfs_vnops.c @@ -245,8 +245,11 @@ restart: if ((error = VOP_OPEN(vp, fmode, cred, td, fp)) != 0) goto bad; - if (fmode & FWRITE) + if (fmode & FWRITE) { vp->v_writecount++; + CTR3(KTR_VFS, "%s: vp %p v_writecount increased to %d", + __func__, vp, vp->v_writecount); + } *flagp = fmode; ASSERT_VOP_LOCKED(vp, "vn_open_cred"); if (!mpsafe) @@ -309,6 +312,8 @@ vn_close(vp, flags, file_cred, td) VNASSERT(vp->v_writecount > 0, vp, ("vn_close: negative writecount")); vp->v_writecount--; + CTR3(KTR_VFS, "%s: vp %p v_writecount decreased to %d", + __func__, vp, vp->v_writecount); } error = VOP_CLOSE(vp, flags, file_cred, td); vput(vp); |
