From: Deepa Dinamani Subject: [PATCH v6 3/4] vfs: Add timestamp_truncate() api Date: Sun, 21 Jan 2018 18:04:25 -0800 Message-ID: <20180122020426.2988-4-deepa.kernel@gmail.com> References: <20180122020426.2988-1-deepa.kernel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Cc: linux-fsdevel@vger.kernel.org, y2038@lists.linaro.org, torvalds@linux-foundation.org, linux-kernel@vger.kernel.org, arnd@arndb.de To: viro@zeniv.linux.org.uk, tytso@mit.edu, adilger.kernel@dilger.ca, linux-ext4@vger.kernel.org Return-path: In-Reply-To: <20180122020426.2988-1-deepa.kernel@gmail.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: y2038-bounces@lists.linaro.org Sender: "Y2038" List-Id: linux-ext4.vger.kernel.org dGltZXNwZWNfdHJ1bmMoKSBmdW5jdGlvbiBpcyB1c2VkIHRvIHRydW5jYXRlIGEKZmlsZXN5c3Rl bSB0aW1lc3RhbXAgdG8gdGhlIHJpZ2h0IGdyYW51bGFyaXR5LgpCdXQsIHRoZSBmdW5jdGlvbiBk b2VzIG5vdCBjbGFtcCB0dl9zZWMgcGFydCBvZiB0aGUKdGltZXN0YW1wcyBhY2NvcmRpbmcgdG8g dGhlIGZpbGVzeXN0ZW0gdGltZXN0YW1wIGxpbWl0cy4KCkFsc28sIHRpbWVzcGVjX3RydW5jKCkg aXMgZXhjbHVzaXZlbHkgdXNlZCBmb3IgZmlsZXN5c3RlbQp0aW1lc3RhbXBzLiBNb3ZlIHRoZSBh cGkgdG8gYmUgcGFydCBvZiB2ZnMuCgpUaGUgcmVwbGFjZW1lbnQgYXBpOiB0aW1lc3RhbXBfdHJ1 bmNhdGUoKSBhbHNvIGFsdGVycyB0aGUKc2lnbmF0dXJlIG9mIHRoZSBmdW5jdGlvbiB0byBhY2Nv bW1vZGF0ZSBmaWxlc3lzdGVtCnRpbWVzdGFtcCBjbGFtcGluZyBhY2NvcmRpbmcgdG8gZmxlc3lz dGVtIGxpbWl0cy4KCk5vdGUgdGhhdCB0aGUgY2xhbXBfdCBtYWNybyBpcyB1c2VkIGZvciBjbGFt cGluZyBoZXJlIGFzIHZmcwppcyBub3QgeWV0IHVzaW5nIHN0cnVjdCB0aW1lc3BlYzY0IGludGVy bmFsbHkuIFRoaXMgaXMKcmVxdWlyZWQgZm9yIGNvbXBpbGF0aW9uIHB1cnBvc2VzLgpBbHNvIG5v dGUgdGhhdCBjbGFtcCB3b24ndCBkbyB0aGUgcmlnaHQgdGhpbmcgZm9yIHRpbWVzdGFtcHMKYmV5 b25kIDIwMzggb24gMzItYml0IG1hY2hpbmVzIHVudGlsIHRoZSB2ZnMgdXNlcyB0aW1lc3BlYzY0 LgpBZnRlciB0aGUgdmZzIGlzIHRyYW5zaXRpb25lZCB0byB1c2UgdGltZXNwZWM2NCBmb3IgdGlt ZXN0YW1wcywKY2xhbXBfdCgpIGNhbiBiZSByZXBsYWNlZCBieSBjbGFtcCgpLgoKU2lnbmVkLW9m Zi1ieTogRGVlcGEgRGluYW1hbmkgPGRlZXBhLmtlcm5lbEBnbWFpbC5jb20+Ci0tLQogZnMvaW5v ZGUuYyB8IDMyICsrKysrKysrKysrKysrKysrKysrKysrKysrKysrKystCiAxIGZpbGUgY2hhbmdl ZCwgMzEgaW5zZXJ0aW9ucygrKSwgMSBkZWxldGlvbigtKQoKZGlmZiAtLWdpdCBhL2ZzL2lub2Rl LmMgYi9mcy9pbm9kZS5jCmluZGV4IGVmMzYyMzY0ZDM5Ni4uMGUyODIwYWRlNTU0IDEwMDY0NAot LS0gYS9mcy9pbm9kZS5jCisrKyBiL2ZzL2lub2RlLmMKQEAgLTIxMDcsNiArMjEwNywzNiBAQCB2 b2lkIGlub2RlX25vaGlnaG1lbShzdHJ1Y3QgaW5vZGUgKmlub2RlKQogfQogRVhQT1JUX1NZTUJP TChpbm9kZV9ub2hpZ2htZW0pOwogCisvKioKKyAqIHRpbWVzdGFtcF90cnVuY2F0ZSAtIFRydW5j YXRlIHRpbWVzcGVjIHRvIGEgZ3JhbnVsYXJpdHkKKyAqIEB0OiBUaW1lc3BlYworICogQGlub2Rl OiBpbm9kZSBiZWluZyB1cGRhdGVkCisgKgorICogVHJ1bmNhdGUgYSB0aW1lc3BlYyB0byB0aGUg Z3JhbnVsYXJpdHkgc3VwcG9ydGVkIGJ5IHRoZSBmcworICogY29udGFpbmluZyB0aGUgaW5vZGUu IEFsd2F5cyByb3VuZHMgZG93bi4gZ3JhbiBtdXN0CisgKiBub3QgYmUgMCBub3IgZ3JlYXRlciB0 aGFuIGEgc2Vjb25kIChOU0VDX1BFUl9TRUMsIG9yIDEwXjkgbnMpLgorICovCitzdHJ1Y3QgdGlt ZXNwZWMgdGltZXN0YW1wX3RydW5jYXRlKHN0cnVjdCB0aW1lc3BlYyB0LCBzdHJ1Y3QgaW5vZGUg Kmlub2RlKQoreworCXN0cnVjdCBzdXBlcl9ibG9jayAqc2IgPSBpbm9kZS0+aV9zYjsKKwl1bnNp Z25lZCBpbnQgZ3JhbiA9IHNiLT5zX3RpbWVfZ3JhbjsKKworCXQudHZfc2VjID0gY2xhbXBfdCh0 aW1lNjRfdCwgdC50dl9zZWMsIHNiLT5zX3RpbWVfbWluLCBzYi0+c190aW1lX21heCk7CisKKwkv KiBBdm9pZCBkaXZpc2lvbiBpbiB0aGUgY29tbW9uIGNhc2VzIDEgbnMgYW5kIDEgcy4gKi8KKwlp ZiAoZ3JhbiA9PSAxKSB7CisJCS8qIG5vdGhpbmcgKi8KKwl9IGVsc2UgaWYgKGdyYW4gPT0gTlNF Q19QRVJfU0VDKSB7CisJCXQudHZfbnNlYyA9IDA7CisJfSBlbHNlIGlmIChncmFuID4gMSAmJiBn cmFuIDwgTlNFQ19QRVJfU0VDKSB7CisJCXQudHZfbnNlYyAtPSB0LnR2X25zZWMgJSBncmFuOwor CX0gZWxzZSB7CisJCVdBUk4oMSwgImlsbGVnYWwgZmlsZSB0aW1lIGdyYW51bGFyaXR5OiAldSIs IGdyYW4pOworCX0KKwlyZXR1cm4gdDsKK30KK0VYUE9SVF9TWU1CT0wodGltZXN0YW1wX3RydW5j YXRlKTsKKwogLyoqCiAgKiBjdXJyZW50X3RpbWUgLSBSZXR1cm4gRlMgdGltZQogICogQGlub2Rl OiBpbm9kZS4KQEAgLTIxMjYsNiArMjE1Niw2IEBAIHN0cnVjdCB0aW1lc3BlYyBjdXJyZW50X3Rp bWUoc3RydWN0IGlub2RlICppbm9kZSkKIAkJcmV0dXJuIG5vdzsKIAl9CiAKLQlyZXR1cm4gdGlt ZXNwZWNfdHJ1bmMobm93LCBpbm9kZS0+aV9zYi0+c190aW1lX2dyYW4pOworCXJldHVybiB0aW1l c3RhbXBfdHJ1bmNhdGUobm93LCBpbm9kZSk7CiB9CiBFWFBPUlRfU1lNQk9MKGN1cnJlbnRfdGlt ZSk7Ci0tIAoyLjE0LjEKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fClkyMDM4IG1haWxpbmcgbGlzdApZMjAzOEBsaXN0cy5saW5hcm8ub3JnCmh0dHBzOi8v bGlzdHMubGluYXJvLm9yZy9tYWlsbWFuL2xpc3RpbmZvL3kyMDM4Cg==