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author | Alan Somers <asomers@FreeBSD.org> | 2022-09-25 17:56:11 +0000 |
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committer | Alan Somers <asomers@FreeBSD.org> | 2022-09-25 21:02:23 +0000 |
commit | 0a192b3abab19deac70f762cd1ec45ba09ec47ca (patch) | |
tree | a69de5d5d9f93e4d175455747774368a56cf8de8 | |
parent | 550e01c552474babae468011191ecc5130cc153e (diff) | |
download | src-0a192b3abab19deac70f762cd1ec45ba09ec47ca.tar.gz src-0a192b3abab19deac70f762cd1ec45ba09ec47ca.zip |
fusefs: respect RLIMIT_FSIZE during truncate
PR: 164793
MFC after: 2 weeks
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D36703
-rw-r--r-- | sys/fs/fuse/fuse_vnops.c | 3 | ||||
-rw-r--r-- | tests/sys/fs/fusefs/setattr.cc | 44 |
2 files changed, 46 insertions, 1 deletions
diff --git a/sys/fs/fuse/fuse_vnops.c b/sys/fs/fuse/fuse_vnops.c index e89b831a4859..6fa9a2b248c6 100644 --- a/sys/fs/fuse/fuse_vnops.c +++ b/sys/fs/fuse/fuse_vnops.c @@ -2248,6 +2248,9 @@ fuse_vnop_setattr(struct vop_setattr_args *ap) case VREG: if (vfs_isrdonly(mp)) return (EROFS); + err = vn_rlimit_trunc(vap->va_size, td); + if (err) + return (err); break; default: /* diff --git a/tests/sys/fs/fusefs/setattr.cc b/tests/sys/fs/fusefs/setattr.cc index 00b37ec7965a..e245c274ba07 100644 --- a/tests/sys/fs/fusefs/setattr.cc +++ b/tests/sys/fs/fusefs/setattr.cc @@ -31,10 +31,14 @@ */ extern "C" { +#include <sys/types.h> +#include <sys/resource.h> #include <sys/stat.h> +#include <sys/time.h> #include <fcntl.h> #include <semaphore.h> +#include <signal.h> } #include "mockfs.hh" @@ -42,11 +46,15 @@ extern "C" { using namespace testing; -class Setattr : public FuseTest {}; +class Setattr : public FuseTest { +public: +static sig_atomic_t s_sigxfsz; +}; class RofsSetattr: public Setattr { public: virtual void SetUp() { + s_sigxfsz = 0; m_ro = true; Setattr::SetUp(); } @@ -61,6 +69,12 @@ virtual void SetUp() { }; +sig_atomic_t Setattr::s_sigxfsz = 0; + +void sigxfsz_handler(int __unused sig) { + Setattr::s_sigxfsz = 1; +} + /* * If setattr returns a non-zero cache timeout, then subsequent VOP_GETATTRs * should use the cached attributes, rather than query the daemon @@ -553,6 +567,34 @@ TEST_F(Setattr, truncate_discards_cached_data) { leak(fd); } +/* truncate should fail if it would cause the file to exceed RLIMIT_FSIZE */ +TEST_F(Setattr, truncate_rlimit_rsize) +{ + const char FULLPATH[] = "mountpoint/some_file.txt"; + const char RELPATH[] = "some_file.txt"; + struct rlimit rl; + const uint64_t ino = 42; + const uint64_t oldsize = 0; + const uint64_t newsize = 100'000'000; + + EXPECT_LOOKUP(FUSE_ROOT_ID, RELPATH) + .WillOnce(Invoke(ReturnImmediate([=](auto in __unused, auto& out) { + SET_OUT_HEADER_LEN(out, entry); + out.body.entry.attr.mode = S_IFREG | 0644; + out.body.entry.nodeid = ino; + out.body.entry.attr.size = oldsize; + }))); + + rl.rlim_cur = newsize / 2; + rl.rlim_max = 10 * newsize; + ASSERT_EQ(0, setrlimit(RLIMIT_FSIZE, &rl)) << strerror(errno); + ASSERT_NE(SIG_ERR, signal(SIGXFSZ, sigxfsz_handler)) << strerror(errno); + + EXPECT_EQ(-1, truncate(FULLPATH, newsize)); + EXPECT_EQ(EFBIG, errno); + EXPECT_EQ(1, s_sigxfsz); +} + /* Change a file's timestamps */ TEST_F(Setattr, utimensat) { const char FULLPATH[] = "mountpoint/some_file.txt"; |