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FAILED: patch "[PATCH] bpf: Check size for BTF-based ctx access of pointer members" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 659b9ba7cb2d7adb64618b87ddfaa528a143766e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121504-cloak-campfire-b8a9@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 659b9ba7cb2d7adb64618b87ddfaa528a143766e Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Date: Thu, 12 Dec 2024 01:20:49 -0800 Subject: [PATCH] bpf: Check size for BTF-based ctx access of pointer members Robert Morris reported the following program type which passes the verifier in [0]: SEC("struct_ops/bpf_cubic_init") void BPF_PROG(bpf_cubic_init, struct sock *sk) { asm volatile("r2 = *(u16*)(r1 + 0)"); // verifier should demand u64 asm volatile("*(u32 *)(r2 +1504) = 0"); // 1280 in some configs } The second line may or may not work, but the first instruction shouldn't pass, as it's a narrow load into the context structure of the struct ops callback. The code falls back to btf_ctx_access to ensure correctness and obtaining the types of pointers. Ensure that the size of the access is correctly checked to be 8 bytes, otherwise the verifier thinks the narrow load obtained a trusted BTF pointer and will permit loads/stores as it sees fit. Perform the check on size after we've verified that the load is for a pointer field, as for scalar values narrow loads are fine. Access to structs passed as arguments to a BPF program are also treated as scalars, therefore no adjustment is needed in their case. Existing verifier selftests are broken by this change, but because they were incorrect. Verifier tests for d_path were performing narrow load into context to obtain path pointer, had this program actually run it would cause a crash. The same holds for verifier_btf_ctx_access tests. [0]: https://lore.kernel.org/bpf/51338.1732985814@localhost Fixes: 9e15db66136a ("bpf: Implement accurate raw_tp context access via BTF") Reported-by: Robert Morris <rtm(a)mit.edu> Signed-off-by: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Link: https://lore.kernel.org/r/20241212092050.3204165-2-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index e7a59e6462a9..a63a03582f02 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -6543,6 +6543,12 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type, return false; } + if (size != sizeof(u64)) { + bpf_log(log, "func '%s' size %d must be 8\n", + tname, size); + return false; + } + /* check for PTR_TO_RDONLY_BUF_OR_NULL or PTR_TO_RDWR_BUF_OR_NULL */ for (i = 0; i < prog->aux->ctx_arg_info_size; i++) { const struct bpf_ctx_arg_aux *ctx_arg_info = &prog->aux->ctx_arg_info[i]; diff --git a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c index a570e48b917a..bfc3bf18fed4 100644 --- a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c +++ b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void btf_ctx_access_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 8); /* load 2nd argument value (int pointer) */\ + r2 = *(u64 *)(r1 + 8); /* load 2nd argument value (int pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); @@ -23,7 +23,7 @@ __success __retval(0) __naked void ctx_access_u32_pointer_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ + r2 = *(u64 *)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); diff --git a/tools/testing/selftests/bpf/progs/verifier_d_path.c b/tools/testing/selftests/bpf/progs/verifier_d_path.c index ec79cbcfde91..87e51a215558 100644 --- a/tools/testing/selftests/bpf/progs/verifier_d_path.c +++ b/tools/testing/selftests/bpf/progs/verifier_d_path.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void d_path_accept(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \ @@ -31,7 +31,7 @@ __failure __msg("helper call is not allowed in probe") __naked void d_path_reject(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \

12 months

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FAILED: patch "[PATCH] bpf: Check size for BTF-based ctx access of pointer members" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 659b9ba7cb2d7adb64618b87ddfaa528a143766e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121503-footwork-harness-0128@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 659b9ba7cb2d7adb64618b87ddfaa528a143766e Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Date: Thu, 12 Dec 2024 01:20:49 -0800 Subject: [PATCH] bpf: Check size for BTF-based ctx access of pointer members Robert Morris reported the following program type which passes the verifier in [0]: SEC("struct_ops/bpf_cubic_init") void BPF_PROG(bpf_cubic_init, struct sock *sk) { asm volatile("r2 = *(u16*)(r1 + 0)"); // verifier should demand u64 asm volatile("*(u32 *)(r2 +1504) = 0"); // 1280 in some configs } The second line may or may not work, but the first instruction shouldn't pass, as it's a narrow load into the context structure of the struct ops callback. The code falls back to btf_ctx_access to ensure correctness and obtaining the types of pointers. Ensure that the size of the access is correctly checked to be 8 bytes, otherwise the verifier thinks the narrow load obtained a trusted BTF pointer and will permit loads/stores as it sees fit. Perform the check on size after we've verified that the load is for a pointer field, as for scalar values narrow loads are fine. Access to structs passed as arguments to a BPF program are also treated as scalars, therefore no adjustment is needed in their case. Existing verifier selftests are broken by this change, but because they were incorrect. Verifier tests for d_path were performing narrow load into context to obtain path pointer, had this program actually run it would cause a crash. The same holds for verifier_btf_ctx_access tests. [0]: https://lore.kernel.org/bpf/51338.1732985814@localhost Fixes: 9e15db66136a ("bpf: Implement accurate raw_tp context access via BTF") Reported-by: Robert Morris <rtm(a)mit.edu> Signed-off-by: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Link: https://lore.kernel.org/r/20241212092050.3204165-2-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index e7a59e6462a9..a63a03582f02 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -6543,6 +6543,12 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type, return false; } + if (size != sizeof(u64)) { + bpf_log(log, "func '%s' size %d must be 8\n", + tname, size); + return false; + } + /* check for PTR_TO_RDONLY_BUF_OR_NULL or PTR_TO_RDWR_BUF_OR_NULL */ for (i = 0; i < prog->aux->ctx_arg_info_size; i++) { const struct bpf_ctx_arg_aux *ctx_arg_info = &prog->aux->ctx_arg_info[i]; diff --git a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c index a570e48b917a..bfc3bf18fed4 100644 --- a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c +++ b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void btf_ctx_access_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 8); /* load 2nd argument value (int pointer) */\ + r2 = *(u64 *)(r1 + 8); /* load 2nd argument value (int pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); @@ -23,7 +23,7 @@ __success __retval(0) __naked void ctx_access_u32_pointer_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ + r2 = *(u64 *)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); diff --git a/tools/testing/selftests/bpf/progs/verifier_d_path.c b/tools/testing/selftests/bpf/progs/verifier_d_path.c index ec79cbcfde91..87e51a215558 100644 --- a/tools/testing/selftests/bpf/progs/verifier_d_path.c +++ b/tools/testing/selftests/bpf/progs/verifier_d_path.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void d_path_accept(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \ @@ -31,7 +31,7 @@ __failure __msg("helper call is not allowed in probe") __naked void d_path_reject(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \

12 months

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FAILED: patch "[PATCH] bpf: Check size for BTF-based ctx access of pointer members" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 659b9ba7cb2d7adb64618b87ddfaa528a143766e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121502-patriarch-unguarded-b4c5@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 659b9ba7cb2d7adb64618b87ddfaa528a143766e Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Date: Thu, 12 Dec 2024 01:20:49 -0800 Subject: [PATCH] bpf: Check size for BTF-based ctx access of pointer members Robert Morris reported the following program type which passes the verifier in [0]: SEC("struct_ops/bpf_cubic_init") void BPF_PROG(bpf_cubic_init, struct sock *sk) { asm volatile("r2 = *(u16*)(r1 + 0)"); // verifier should demand u64 asm volatile("*(u32 *)(r2 +1504) = 0"); // 1280 in some configs } The second line may or may not work, but the first instruction shouldn't pass, as it's a narrow load into the context structure of the struct ops callback. The code falls back to btf_ctx_access to ensure correctness and obtaining the types of pointers. Ensure that the size of the access is correctly checked to be 8 bytes, otherwise the verifier thinks the narrow load obtained a trusted BTF pointer and will permit loads/stores as it sees fit. Perform the check on size after we've verified that the load is for a pointer field, as for scalar values narrow loads are fine. Access to structs passed as arguments to a BPF program are also treated as scalars, therefore no adjustment is needed in their case. Existing verifier selftests are broken by this change, but because they were incorrect. Verifier tests for d_path were performing narrow load into context to obtain path pointer, had this program actually run it would cause a crash. The same holds for verifier_btf_ctx_access tests. [0]: https://lore.kernel.org/bpf/51338.1732985814@localhost Fixes: 9e15db66136a ("bpf: Implement accurate raw_tp context access via BTF") Reported-by: Robert Morris <rtm(a)mit.edu> Signed-off-by: Kumar Kartikeya Dwivedi <memxor(a)gmail.com> Link: https://lore.kernel.org/r/20241212092050.3204165-2-memxor@gmail.com Signed-off-by: Alexei Starovoitov <ast(a)kernel.org> diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index e7a59e6462a9..a63a03582f02 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -6543,6 +6543,12 @@ bool btf_ctx_access(int off, int size, enum bpf_access_type type, return false; } + if (size != sizeof(u64)) { + bpf_log(log, "func '%s' size %d must be 8\n", + tname, size); + return false; + } + /* check for PTR_TO_RDONLY_BUF_OR_NULL or PTR_TO_RDWR_BUF_OR_NULL */ for (i = 0; i < prog->aux->ctx_arg_info_size; i++) { const struct bpf_ctx_arg_aux *ctx_arg_info = &prog->aux->ctx_arg_info[i]; diff --git a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c index a570e48b917a..bfc3bf18fed4 100644 --- a/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c +++ b/tools/testing/selftests/bpf/progs/verifier_btf_ctx_access.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void btf_ctx_access_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 8); /* load 2nd argument value (int pointer) */\ + r2 = *(u64 *)(r1 + 8); /* load 2nd argument value (int pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); @@ -23,7 +23,7 @@ __success __retval(0) __naked void ctx_access_u32_pointer_accept(void) { asm volatile (" \ - r2 = *(u32*)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ + r2 = *(u64 *)(r1 + 0); /* load 1nd argument value (u32 pointer) */\ r0 = 0; \ exit; \ " ::: __clobber_all); diff --git a/tools/testing/selftests/bpf/progs/verifier_d_path.c b/tools/testing/selftests/bpf/progs/verifier_d_path.c index ec79cbcfde91..87e51a215558 100644 --- a/tools/testing/selftests/bpf/progs/verifier_d_path.c +++ b/tools/testing/selftests/bpf/progs/verifier_d_path.c @@ -11,7 +11,7 @@ __success __retval(0) __naked void d_path_accept(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \ @@ -31,7 +31,7 @@ __failure __msg("helper call is not allowed in probe") __naked void d_path_reject(void) { asm volatile (" \ - r1 = *(u32*)(r1 + 0); \ + r1 = *(u64 *)(r1 + 0); \ r2 = r10; \ r2 += -8; \ r6 = 0; \

12 months

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FAILED: patch "[PATCH] xfs: fix off-by-one error in fsmap's end_daddr usage" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x a440a28ddbdcb861150987b4d6e828631656b92f # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121553-prison-usage-c221@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From a440a28ddbdcb861150987b4d6e828631656b92f Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:24 -0800 Subject: [PATCH] xfs: fix off-by-one error in fsmap's end_daddr usage In commit ca6448aed4f10a, we created an "end_daddr" variable to fix fsmap reporting when the end of the range requested falls in the middle of an unknown (aka free on the rmapbt) region. Unfortunately, I didn't notice that the the code sets end_daddr to the last sector of the device but then uses that quantity to compute the length of the synthesized mapping. Zizhi Wo later observed that when end_daddr isn't set, we still don't report the last fsblock on a device because in that case (aka when info->last is true), the info->high mapping that we pass to xfs_getfsmap_group_helper has a startblock that points to the last fsblock. This is also wrong because the code uses startblock to compute the length of the synthesized mapping. Fix the second problem by setting end_daddr unconditionally, and fix the first problem by setting start_daddr to one past the end of the range to query. Cc: <stable(a)vger.kernel.org> # v6.11 Fixes: ca6448aed4f10a ("xfs: Fix missing interval for missing_owner in xfs fsmap") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reported-by: Zizhi Wo <wozizhi(a)huawei.com> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c index 82f2e0dd2249..3290dd8524a6 100644 --- a/fs/xfs/xfs_fsmap.c +++ b/fs/xfs/xfs_fsmap.c @@ -163,7 +163,8 @@ struct xfs_getfsmap_info { xfs_daddr_t next_daddr; /* next daddr we expect */ /* daddr of low fsmap key when we're using the rtbitmap */ xfs_daddr_t low_daddr; - xfs_daddr_t end_daddr; /* daddr of high fsmap key */ + /* daddr of high fsmap key, or the last daddr on the device */ + xfs_daddr_t end_daddr; u64 missing_owner; /* owner of holes */ u32 dev; /* device id */ /* @@ -387,8 +388,8 @@ xfs_getfsmap_group_helper( * we calculated from userspace's high key to synthesize the record. * Note that if the btree query found a mapping, there won't be a gap. */ - if (info->last && info->end_daddr != XFS_BUF_DADDR_NULL) - frec->start_daddr = info->end_daddr; + if (info->last) + frec->start_daddr = info->end_daddr + 1; else frec->start_daddr = xfs_gbno_to_daddr(xg, startblock); @@ -736,11 +737,10 @@ xfs_getfsmap_rtdev_rtbitmap_helper( * we calculated from userspace's high key to synthesize the record. * Note that if the btree query found a mapping, there won't be a gap. */ - if (info->last && info->end_daddr != XFS_BUF_DADDR_NULL) { - frec.start_daddr = info->end_daddr; - } else { + if (info->last) + frec.start_daddr = info->end_daddr + 1; + else frec.start_daddr = xfs_rtb_to_daddr(mp, start_rtb); - } frec.len_daddr = XFS_FSB_TO_BB(mp, rtbcount); return xfs_getfsmap_helper(tp, info, &frec); @@ -933,7 +933,10 @@ xfs_getfsmap( struct xfs_trans *tp = NULL; struct xfs_fsmap dkeys[2]; /* per-dev keys */ struct xfs_getfsmap_dev handlers[XFS_GETFSMAP_DEVS]; - struct xfs_getfsmap_info info = { NULL }; + struct xfs_getfsmap_info info = { + .fsmap_recs = fsmap_recs, + .head = head, + }; bool use_rmap; int i; int error = 0; @@ -998,9 +1001,6 @@ xfs_getfsmap( info.next_daddr = head->fmh_keys[0].fmr_physical + head->fmh_keys[0].fmr_length; - info.end_daddr = XFS_BUF_DADDR_NULL; - info.fsmap_recs = fsmap_recs; - info.head = head; /* For each device we support... */ for (i = 0; i < XFS_GETFSMAP_DEVS; i++) { @@ -1013,17 +1013,23 @@ xfs_getfsmap( break; /* - * If this device number matches the high key, we have - * to pass the high key to the handler to limit the - * query results. If the device number exceeds the - * low key, zero out the low key so that we get - * everything from the beginning. + * If this device number matches the high key, we have to pass + * the high key to the handler to limit the query results, and + * set the end_daddr so that we can synthesize records at the + * end of the query range or device. */ if (handlers[i].dev == head->fmh_keys[1].fmr_device) { dkeys[1] = head->fmh_keys[1]; info.end_daddr = min(handlers[i].nr_sectors - 1, dkeys[1].fmr_physical); + } else { + info.end_daddr = handlers[i].nr_sectors - 1; } + + /* + * If the device number exceeds the low key, zero out the low + * key so that we get everything from the beginning. + */ if (handlers[i].dev > head->fmh_keys[0].fmr_device) memset(&dkeys[0], 0, sizeof(struct xfs_fsmap));

12 months

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FAILED: patch "[PATCH] xfs: separate healthy clearing mask during repair" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x aa7bfb537edf62085d7718845f6644b0e4efb9df # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121542-fretful-identity-5931@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From aa7bfb537edf62085d7718845f6644b0e4efb9df Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:27 -0800 Subject: [PATCH] xfs: separate healthy clearing mask during repair In commit d9041681dd2f53 we introduced some XFS_SICK_*ZAPPED flags so that the inode record repair code could clean up a damaged inode record enough to iget the inode but still be able to remember that the higher level repair code needs to be called. As part of that, we introduced a xchk_mark_healthy_if_clean helper that is supposed to cause the ZAPPED state to be removed if that higher level metadata actually checks out. This was done by setting additional bits in sick_mask hoping that xchk_update_health will clear all those bits after a healthy scrub. Unfortunately, that's not quite what sick_mask means -- bits in that mask are indeed cleared if the metadata is healthy, but they're set if the metadata is NOT healthy. fsck is only intended to set the ZAPPED bits explicitly. If something else sets the CORRUPT/XCORRUPT state after the xchk_mark_healthy_if_clean call, we end up marking the metadata zapped. This can happen if the following sequence happens: 1. Scrub runs, discovers that the metadata is fine but could be optimized and calls xchk_mark_healthy_if_clean on a ZAPPED flag. That causes the ZAPPED flag to be set in sick_mask because the metadata is not CORRUPT or XCORRUPT. 2. Repair runs to optimize the metadata. 3. Some other metadata used for cross-referencing in (1) becomes corrupt. 4. Post-repair scrub runs, but this time it sets CORRUPT or XCORRUPT due to the events in (3). 5. Now the xchk_health_update sets the ZAPPED flag on the metadata we just repaired. This is not the correct state. Fix this by moving the "if healthy" mask to a separate field, and only ever using it to clear the sick state. Cc: <stable(a)vger.kernel.org> # v6.8 Fixes: d9041681dd2f53 ("xfs: set inode sick state flags when we zap either ondisk fork") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/scrub/health.c b/fs/xfs/scrub/health.c index ce86bdad37fa..ccc6ca5934ca 100644 --- a/fs/xfs/scrub/health.c +++ b/fs/xfs/scrub/health.c @@ -71,7 +71,8 @@ /* Map our scrub type to a sick mask and a set of health update functions. */ enum xchk_health_group { - XHG_FS = 1, + XHG_NONE = 1, + XHG_FS, XHG_AG, XHG_INO, XHG_RTGROUP, @@ -83,6 +84,7 @@ struct xchk_health_map { }; static const struct xchk_health_map type_to_health_flag[XFS_SCRUB_TYPE_NR] = { + [XFS_SCRUB_TYPE_PROBE] = { XHG_NONE, 0 }, [XFS_SCRUB_TYPE_SB] = { XHG_AG, XFS_SICK_AG_SB }, [XFS_SCRUB_TYPE_AGF] = { XHG_AG, XFS_SICK_AG_AGF }, [XFS_SCRUB_TYPE_AGFL] = { XHG_AG, XFS_SICK_AG_AGFL }, @@ -133,7 +135,7 @@ xchk_mark_healthy_if_clean( { if (!(sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT | XFS_SCRUB_OFLAG_XCORRUPT))) - sc->sick_mask |= mask; + sc->healthy_mask |= mask; } /* @@ -189,6 +191,7 @@ xchk_update_health( { struct xfs_perag *pag; struct xfs_rtgroup *rtg; + unsigned int mask = sc->sick_mask; bool bad; /* @@ -203,50 +206,56 @@ xchk_update_health( return; } - if (!sc->sick_mask) - return; - bad = (sc->sm->sm_flags & (XFS_SCRUB_OFLAG_CORRUPT | XFS_SCRUB_OFLAG_XCORRUPT)); + if (!bad) + mask |= sc->healthy_mask; switch (type_to_health_flag[sc->sm->sm_type].group) { + case XHG_NONE: + break; case XHG_AG: + if (!mask) + return; pag = xfs_perag_get(sc->mp, sc->sm->sm_agno); if (bad) - xfs_group_mark_corrupt(pag_group(pag), sc->sick_mask); + xfs_group_mark_corrupt(pag_group(pag), mask); else - xfs_group_mark_healthy(pag_group(pag), sc->sick_mask); + xfs_group_mark_healthy(pag_group(pag), mask); xfs_perag_put(pag); break; case XHG_INO: if (!sc->ip) return; - if (bad) { - unsigned int mask = sc->sick_mask; - - /* - * If we're coming in for repairs then we don't want - * sickness flags to propagate to the incore health - * status if the inode gets inactivated before we can - * fix it. - */ - if (sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) - mask |= XFS_SICK_INO_FORGET; + /* + * If we're coming in for repairs then we don't want sickness + * flags to propagate to the incore health status if the inode + * gets inactivated before we can fix it. + */ + if (sc->sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) + mask |= XFS_SICK_INO_FORGET; + if (!mask) + return; + if (bad) xfs_inode_mark_corrupt(sc->ip, mask); - } else - xfs_inode_mark_healthy(sc->ip, sc->sick_mask); + else + xfs_inode_mark_healthy(sc->ip, mask); break; case XHG_FS: + if (!mask) + return; if (bad) - xfs_fs_mark_corrupt(sc->mp, sc->sick_mask); + xfs_fs_mark_corrupt(sc->mp, mask); else - xfs_fs_mark_healthy(sc->mp, sc->sick_mask); + xfs_fs_mark_healthy(sc->mp, mask); break; case XHG_RTGROUP: + if (!mask) + return; rtg = xfs_rtgroup_get(sc->mp, sc->sm->sm_agno); if (bad) - xfs_group_mark_corrupt(rtg_group(rtg), sc->sick_mask); + xfs_group_mark_corrupt(rtg_group(rtg), mask); else - xfs_group_mark_healthy(rtg_group(rtg), sc->sick_mask); + xfs_group_mark_healthy(rtg_group(rtg), mask); xfs_rtgroup_put(rtg); break; default: diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h index a7fda3e2b013..5dbbe93cb49b 100644 --- a/fs/xfs/scrub/scrub.h +++ b/fs/xfs/scrub/scrub.h @@ -184,6 +184,12 @@ struct xfs_scrub { */ unsigned int sick_mask; + /* + * Clear these XFS_SICK_* flags but only if the scan is ok. Useful for + * removing ZAPPED flags after a repair. + */ + unsigned int healthy_mask; + /* next time we want to cond_resched() */ struct xchk_relax relax;

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FAILED: patch "[PATCH] xfs: attach dquot buffer to dquot log item buffer" failed to apply to 6.12-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.12-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.12.y git checkout FETCH_HEAD git cherry-pick -x acc8f8628c3737108f36e5637f4d5daeaf96d90e # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121529-renewal-passable-b4c9@gregkh' --subject-prefix 'PATCH 6.12.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From acc8f8628c3737108f36e5637f4d5daeaf96d90e Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:38 -0800 Subject: [PATCH] xfs: attach dquot buffer to dquot log item buffer Ever since 6.12-rc1, I've observed a pile of warnings from the kernel when running fstests with quotas enabled: WARNING: CPU: 1 PID: 458580 at mm/page_alloc.c:4221 __alloc_pages_noprof+0xc9c/0xf18 CPU: 1 UID: 0 PID: 458580 Comm: xfsaild/sda3 Tainted: G W 6.12.0-rc6-djwa #rc6 6ee3e0e531f6457e2d26aa008a3b65ff184b377c <snip> Call trace: __alloc_pages_noprof+0xc9c/0xf18 alloc_pages_mpol_noprof+0x94/0x240 alloc_pages_noprof+0x68/0xf8 new_slab+0x3e0/0x568 ___slab_alloc+0x5a0/0xb88 __slab_alloc.constprop.0+0x7c/0xf8 __kmalloc_noprof+0x404/0x4d0 xfs_buf_get_map+0x594/0xde0 [xfs 384cb02810558b4c490343c164e9407332118f88] xfs_buf_read_map+0x64/0x2e0 [xfs 384cb02810558b4c490343c164e9407332118f88] xfs_trans_read_buf_map+0x1dc/0x518 [xfs 384cb02810558b4c490343c164e9407332118f88] xfs_qm_dqflush+0xac/0x468 [xfs 384cb02810558b4c490343c164e9407332118f88] xfs_qm_dquot_logitem_push+0xe4/0x148 [xfs 384cb02810558b4c490343c164e9407332118f88] xfsaild+0x3f4/0xde8 [xfs 384cb02810558b4c490343c164e9407332118f88] kthread+0x110/0x128 ret_from_fork+0x10/0x20 ---[ end trace 0000000000000000 ]--- This corresponds to the line: WARN_ON_ONCE(current->flags & PF_MEMALLOC); within the NOFAIL checks. What's happening here is that the XFS AIL is trying to write a disk quota update back into the filesystem, but for that it needs to read the ondisk buffer for the dquot. The buffer is not in memory anymore, probably because it was evicted. Regardless, the buffer cache tries to allocate a new buffer, but those allocations are NOFAIL. The AIL thread has marked itself PF_MEMALLOC (aka noreclaim) since commit 43ff2122e6492b ("xfs: on-stack delayed write buffer lists") presumably because reclaim can push on XFS to push on the AIL. An easy way to fix this probably would have been to drop the NOFAIL flag from the xfs_buf allocation and open code a retry loop, but then there's still the problem that for bs>ps filesystems, the buffer itself could require up to 64k worth of pages. Inode items had similar behavior (multi-page cluster buffers that we don't want to allocate in the AIL) which we solved by making transaction precommit attach the inode cluster buffers to the dirty log item. Let's solve the dquot problem in the same way. So: Make a real precommit handler to read the dquot buffer and attach it to the log item; pass it to dqflush in the push method; and have the iodone function detach the buffer once we've flushed everything. Add a state flag to the log item to track when a thread has entered the precommit -> push mechanism to skip the detaching if it turns out that the dquot is very busy, as we don't hold the dquot lock between log item commit and AIL push). Reading and attaching the dquot buffer in the precommit hook is inspired by the work done for inode cluster buffers some time ago. Cc: <stable(a)vger.kernel.org> # v6.12 Fixes: 903edea6c53f09 ("mm: warn about illegal __GFP_NOFAIL usage in a more appropriate location and manner") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c index 1dc85de58e59..708fd3358375 100644 --- a/fs/xfs/xfs_dquot.c +++ b/fs/xfs/xfs_dquot.c @@ -68,6 +68,30 @@ xfs_dquot_mark_sick( } } +/* + * Detach the dquot buffer if it's still attached, because we can get called + * through dqpurge after a log shutdown. Caller must hold the dqflock or have + * otherwise isolated the dquot. + */ +void +xfs_dquot_detach_buf( + struct xfs_dquot *dqp) +{ + struct xfs_dq_logitem *qlip = &dqp->q_logitem; + struct xfs_buf *bp = NULL; + + spin_lock(&qlip->qli_lock); + if (qlip->qli_item.li_buf) { + bp = qlip->qli_item.li_buf; + qlip->qli_item.li_buf = NULL; + } + spin_unlock(&qlip->qli_lock); + if (bp) { + list_del_init(&qlip->qli_item.li_bio_list); + xfs_buf_rele(bp); + } +} + /* * This is called to free all the memory associated with a dquot */ @@ -76,6 +100,7 @@ xfs_qm_dqdestroy( struct xfs_dquot *dqp) { ASSERT(list_empty(&dqp->q_lru)); + ASSERT(dqp->q_logitem.qli_item.li_buf == NULL); kvfree(dqp->q_logitem.qli_item.li_lv_shadow); mutex_destroy(&dqp->q_qlock); @@ -1146,6 +1171,7 @@ xfs_qm_dqflush_done( container_of(lip, struct xfs_dq_logitem, qli_item); struct xfs_dquot *dqp = qlip->qli_dquot; struct xfs_ail *ailp = lip->li_ailp; + struct xfs_buf *bp = NULL; xfs_lsn_t tail_lsn; /* @@ -1171,6 +1197,20 @@ xfs_qm_dqflush_done( } } + /* + * If this dquot hasn't been dirtied since initiating the last dqflush, + * release the buffer reference. We already unlinked this dquot item + * from the buffer. + */ + spin_lock(&qlip->qli_lock); + if (!qlip->qli_dirty) { + bp = lip->li_buf; + lip->li_buf = NULL; + } + spin_unlock(&qlip->qli_lock); + if (bp) + xfs_buf_rele(bp); + /* * Release the dq's flush lock since we're done with it. */ @@ -1197,7 +1237,7 @@ xfs_buf_dquot_io_fail( spin_lock(&bp->b_mount->m_ail->ail_lock); list_for_each_entry(lip, &bp->b_li_list, li_bio_list) - xfs_set_li_failed(lip, bp); + set_bit(XFS_LI_FAILED, &lip->li_flags); spin_unlock(&bp->b_mount->m_ail->ail_lock); } @@ -1249,6 +1289,7 @@ int xfs_dquot_read_buf( struct xfs_trans *tp, struct xfs_dquot *dqp, + xfs_buf_flags_t xbf_flags, struct xfs_buf **bpp) { struct xfs_mount *mp = dqp->q_mount; @@ -1256,7 +1297,7 @@ xfs_dquot_read_buf( int error; error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, dqp->q_blkno, - mp->m_quotainfo->qi_dqchunklen, XBF_TRYLOCK, + mp->m_quotainfo->qi_dqchunklen, xbf_flags, &bp, &xfs_dquot_buf_ops); if (error == -EAGAIN) return error; @@ -1275,6 +1316,77 @@ xfs_dquot_read_buf( return error; } +/* + * Attach a dquot buffer to this dquot to avoid allocating a buffer during a + * dqflush, since dqflush can be called from reclaim context. + */ +int +xfs_dquot_attach_buf( + struct xfs_trans *tp, + struct xfs_dquot *dqp) +{ + struct xfs_dq_logitem *qlip = &dqp->q_logitem; + struct xfs_log_item *lip = &qlip->qli_item; + int error; + + spin_lock(&qlip->qli_lock); + if (!lip->li_buf) { + struct xfs_buf *bp = NULL; + + spin_unlock(&qlip->qli_lock); + error = xfs_dquot_read_buf(tp, dqp, 0, &bp); + if (error) + return error; + + /* + * Attach the dquot to the buffer so that the AIL does not have + * to read the dquot buffer to push this item. + */ + xfs_buf_hold(bp); + spin_lock(&qlip->qli_lock); + lip->li_buf = bp; + xfs_trans_brelse(tp, bp); + } + qlip->qli_dirty = true; + spin_unlock(&qlip->qli_lock); + + return 0; +} + +/* + * Get a new reference the dquot buffer attached to this dquot for a dqflush + * operation. + * + * Returns 0 and a NULL bp if none was attached to the dquot; 0 and a locked + * bp; or -EAGAIN if the buffer could not be locked. + */ +int +xfs_dquot_use_attached_buf( + struct xfs_dquot *dqp, + struct xfs_buf **bpp) +{ + struct xfs_buf *bp = dqp->q_logitem.qli_item.li_buf; + + /* + * A NULL buffer can happen if the dquot dirty flag was set but the + * filesystem shut down before transaction commit happened. In that + * case we're not going to flush anyway. + */ + if (!bp) { + ASSERT(xfs_is_shutdown(dqp->q_mount)); + + *bpp = NULL; + return 0; + } + + if (!xfs_buf_trylock(bp)) + return -EAGAIN; + + xfs_buf_hold(bp); + *bpp = bp; + return 0; +} + /* * Write a modified dquot to disk. * The dquot must be locked and the flush lock too taken by caller. @@ -1289,7 +1401,8 @@ xfs_qm_dqflush( struct xfs_buf *bp) { struct xfs_mount *mp = dqp->q_mount; - struct xfs_log_item *lip = &dqp->q_logitem.qli_item; + struct xfs_dq_logitem *qlip = &dqp->q_logitem; + struct xfs_log_item *lip = &qlip->qli_item; struct xfs_dqblk *dqblk; xfs_failaddr_t fa; int error; @@ -1319,8 +1432,15 @@ xfs_qm_dqflush( */ dqp->q_flags &= ~XFS_DQFLAG_DIRTY; - xfs_trans_ail_copy_lsn(mp->m_ail, &dqp->q_logitem.qli_flush_lsn, - &lip->li_lsn); + /* + * We hold the dquot lock, so nobody can dirty it while we're + * scheduling the write out. Clear the dirty-since-flush flag. + */ + spin_lock(&qlip->qli_lock); + qlip->qli_dirty = false; + spin_unlock(&qlip->qli_lock); + + xfs_trans_ail_copy_lsn(mp->m_ail, &qlip->qli_flush_lsn, &lip->li_lsn); /* * copy the lsn into the on-disk dquot now while we have the in memory diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h index 50f8404c4117..c7e80fc90823 100644 --- a/fs/xfs/xfs_dquot.h +++ b/fs/xfs/xfs_dquot.h @@ -215,7 +215,7 @@ void xfs_dquot_to_disk(struct xfs_disk_dquot *ddqp, struct xfs_dquot *dqp); void xfs_qm_dqdestroy(struct xfs_dquot *dqp); int xfs_dquot_read_buf(struct xfs_trans *tp, struct xfs_dquot *dqp, - struct xfs_buf **bpp); + xfs_buf_flags_t flags, struct xfs_buf **bpp); int xfs_qm_dqflush(struct xfs_dquot *dqp, struct xfs_buf *bp); void xfs_qm_dqunpin_wait(struct xfs_dquot *dqp); void xfs_qm_adjust_dqtimers(struct xfs_dquot *d); @@ -239,6 +239,10 @@ void xfs_dqlockn(struct xfs_dqtrx *q); void xfs_dquot_set_prealloc_limits(struct xfs_dquot *); +int xfs_dquot_attach_buf(struct xfs_trans *tp, struct xfs_dquot *dqp); +int xfs_dquot_use_attached_buf(struct xfs_dquot *dqp, struct xfs_buf **bpp); +void xfs_dquot_detach_buf(struct xfs_dquot *dqp); + static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) { xfs_dqlock(dqp); diff --git a/fs/xfs/xfs_dquot_item.c b/fs/xfs/xfs_dquot_item.c index 56ecc5ed0193..271b195ebb93 100644 --- a/fs/xfs/xfs_dquot_item.c +++ b/fs/xfs/xfs_dquot_item.c @@ -123,8 +123,9 @@ xfs_qm_dquot_logitem_push( __releases(&lip->li_ailp->ail_lock) __acquires(&lip->li_ailp->ail_lock) { - struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; - struct xfs_buf *bp = lip->li_buf; + struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip); + struct xfs_dquot *dqp = qlip->qli_dquot; + struct xfs_buf *bp; uint rval = XFS_ITEM_SUCCESS; int error; @@ -155,11 +156,10 @@ xfs_qm_dquot_logitem_push( spin_unlock(&lip->li_ailp->ail_lock); - error = xfs_dquot_read_buf(NULL, dqp, &bp); - if (error) { - if (error == -EAGAIN) - rval = XFS_ITEM_LOCKED; + error = xfs_dquot_use_attached_buf(dqp, &bp); + if (error == -EAGAIN) { xfs_dqfunlock(dqp); + rval = XFS_ITEM_LOCKED; goto out_relock_ail; } @@ -207,12 +207,10 @@ xfs_qm_dquot_logitem_committing( } #ifdef DEBUG_EXPENSIVE -static int -xfs_qm_dquot_logitem_precommit( - struct xfs_trans *tp, - struct xfs_log_item *lip) +static void +xfs_qm_dquot_logitem_precommit_check( + struct xfs_dquot *dqp) { - struct xfs_dquot *dqp = DQUOT_ITEM(lip)->qli_dquot; struct xfs_mount *mp = dqp->q_mount; struct xfs_disk_dquot ddq = { }; xfs_failaddr_t fa; @@ -228,13 +226,24 @@ xfs_qm_dquot_logitem_precommit( xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); ASSERT(fa == NULL); } - - return 0; } #else -# define xfs_qm_dquot_logitem_precommit NULL +# define xfs_qm_dquot_logitem_precommit_check(...) ((void)0) #endif +static int +xfs_qm_dquot_logitem_precommit( + struct xfs_trans *tp, + struct xfs_log_item *lip) +{ + struct xfs_dq_logitem *qlip = DQUOT_ITEM(lip); + struct xfs_dquot *dqp = qlip->qli_dquot; + + xfs_qm_dquot_logitem_precommit_check(dqp); + + return xfs_dquot_attach_buf(tp, dqp); +} + static const struct xfs_item_ops xfs_dquot_item_ops = { .iop_size = xfs_qm_dquot_logitem_size, .iop_precommit = xfs_qm_dquot_logitem_precommit, @@ -259,5 +268,7 @@ xfs_qm_dquot_logitem_init( xfs_log_item_init(dqp->q_mount, &lp->qli_item, XFS_LI_DQUOT, &xfs_dquot_item_ops); + spin_lock_init(&lp->qli_lock); lp->qli_dquot = dqp; + lp->qli_dirty = false; } diff --git a/fs/xfs/xfs_dquot_item.h b/fs/xfs/xfs_dquot_item.h index 794710c24474..d66e52807d76 100644 --- a/fs/xfs/xfs_dquot_item.h +++ b/fs/xfs/xfs_dquot_item.h @@ -14,6 +14,13 @@ struct xfs_dq_logitem { struct xfs_log_item qli_item; /* common portion */ struct xfs_dquot *qli_dquot; /* dquot ptr */ xfs_lsn_t qli_flush_lsn; /* lsn at last flush */ + + /* + * We use this spinlock to coordinate access to the li_buf pointer in + * the log item and the qli_dirty flag. + */ + spinlock_t qli_lock; + bool qli_dirty; /* dirtied since last flush? */ }; void xfs_qm_dquot_logitem_init(struct xfs_dquot *dqp); diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c index d9ac50a33c57..7d07d4b5c339 100644 --- a/fs/xfs/xfs_qm.c +++ b/fs/xfs/xfs_qm.c @@ -148,7 +148,7 @@ xfs_qm_dqpurge( * We don't care about getting disk errors here. We need * to purge this dquot anyway, so we go ahead regardless. */ - error = xfs_dquot_read_buf(NULL, dqp, &bp); + error = xfs_dquot_read_buf(NULL, dqp, XBF_TRYLOCK, &bp); if (error == -EAGAIN) { xfs_dqfunlock(dqp); dqp->q_flags &= ~XFS_DQFLAG_FREEING; @@ -168,6 +168,7 @@ xfs_qm_dqpurge( } xfs_dqflock(dqp); } + xfs_dquot_detach_buf(dqp); out_funlock: ASSERT(atomic_read(&dqp->q_pincount) == 0); @@ -505,7 +506,7 @@ xfs_qm_dquot_isolate( /* we have to drop the LRU lock to flush the dquot */ spin_unlock(&lru->lock); - error = xfs_dquot_read_buf(NULL, dqp, &bp); + error = xfs_dquot_read_buf(NULL, dqp, XBF_TRYLOCK, &bp); if (error) { xfs_dqfunlock(dqp); goto out_unlock_dirty; @@ -523,6 +524,8 @@ xfs_qm_dquot_isolate( xfs_buf_relse(bp); goto out_unlock_dirty; } + + xfs_dquot_detach_buf(dqp); xfs_dqfunlock(dqp); /* @@ -1510,7 +1513,7 @@ xfs_qm_flush_one( goto out_unlock; } - error = xfs_dquot_read_buf(NULL, dqp, &bp); + error = xfs_dquot_read_buf(NULL, dqp, XBF_TRYLOCK, &bp); if (error) goto out_unlock; diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 8ede9d099d1f..f56d62dced97 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -360,7 +360,7 @@ xfsaild_resubmit_item( /* protected by ail_lock */ list_for_each_entry(lip, &bp->b_li_list, li_bio_list) { - if (bp->b_flags & _XBF_INODES) + if (bp->b_flags & (_XBF_INODES | _XBF_DQUOTS)) clear_bit(XFS_LI_FAILED, &lip->li_flags); else xfs_clear_li_failed(lip);

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FAILED: patch "[PATCH] xfs: don't lose solo dquot update transactions" failed to apply to 5.4-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.4.y git checkout FETCH_HEAD git cherry-pick -x 07137e925fa951646325762bda6bd2503dfe64c6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121515-delta-gutter-495f@gregkh' --subject-prefix 'PATCH 5.4.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 07137e925fa951646325762bda6bd2503dfe64c6 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:36 -0800 Subject: [PATCH] xfs: don't lose solo dquot update transactions Quota counter updates are tracked via incore objects which hang off the xfs_trans object. These changes are then turned into dirty log items in xfs_trans_apply_dquot_deltas just prior to commiting the log items to the CIL. However, updating the incore deltas do not cause XFS_TRANS_DIRTY to be set on the transaction. In other words, a pure quota counter update will be silently discarded if there are no other dirty log items attached to the transaction. This is currently not the case anywhere in the filesystem because quota updates always dirty at least one other metadata item, but a subsequent bug fix will add dquot log item precommits, so we actually need a dirty dquot log item prior to xfs_trans_run_precommits. Also let's not leave a logic bomb. Cc: <stable(a)vger.kernel.org> # v2.6.35 Fixes: 0924378a689ccb ("xfs: split out iclog writing from xfs_trans_commit()") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index fa1317cc396c..d7565462af3d 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -101,7 +101,8 @@ extern void xfs_trans_free_dqinfo(struct xfs_trans *); extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, uint, int64_t); extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); -extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); +void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp, + bool already_locked); int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force); extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, @@ -173,7 +174,7 @@ static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, { } #define xfs_trans_apply_dquot_deltas(tp) -#define xfs_trans_unreserve_and_mod_dquots(tp) +#define xfs_trans_unreserve_and_mod_dquots(tp, a) static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force) diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 427a8ba0ab99..4cd25717c9d1 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -866,6 +866,7 @@ __xfs_trans_commit( */ if (tp->t_flags & XFS_TRANS_SB_DIRTY) xfs_trans_apply_sb_deltas(tp); + xfs_trans_apply_dquot_deltas(tp); error = xfs_trans_run_precommits(tp); if (error) @@ -894,11 +895,6 @@ __xfs_trans_commit( ASSERT(tp->t_ticket != NULL); - /* - * If we need to update the superblock, then do it now. - */ - xfs_trans_apply_dquot_deltas(tp); - xlog_cil_commit(log, tp, &commit_seq, regrant); xfs_trans_free(tp); @@ -924,7 +920,7 @@ __xfs_trans_commit( * the dqinfo portion to be. All that means is that we have some * (non-persistent) quota reservations that need to be unreserved. */ - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, true); if (tp->t_ticket) { if (regrant && !xlog_is_shutdown(log)) xfs_log_ticket_regrant(log, tp->t_ticket); @@ -1018,7 +1014,7 @@ xfs_trans_cancel( } #endif xfs_trans_unreserve_and_mod_sb(tp); - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, false); if (tp->t_ticket) { xfs_log_ticket_ungrant(log, tp->t_ticket); diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c index 481ba3dc9f19..713b6d243e56 100644 --- a/fs/xfs/xfs_trans_dquot.c +++ b/fs/xfs/xfs_trans_dquot.c @@ -606,6 +606,24 @@ xfs_trans_apply_dquot_deltas( ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); + + /* + * We've applied the count changes and given back + * whatever reservation we didn't use. Zero out the + * dqtrx fields. + */ + qtrx->qt_blk_res = 0; + qtrx->qt_bcount_delta = 0; + qtrx->qt_delbcnt_delta = 0; + + qtrx->qt_rtblk_res = 0; + qtrx->qt_rtblk_res_used = 0; + qtrx->qt_rtbcount_delta = 0; + qtrx->qt_delrtb_delta = 0; + + qtrx->qt_ino_res = 0; + qtrx->qt_ino_res_used = 0; + qtrx->qt_icount_delta = 0; } } } @@ -642,7 +660,8 @@ xfs_trans_unreserve_and_mod_dquots_hook( */ void xfs_trans_unreserve_and_mod_dquots( - struct xfs_trans *tp) + struct xfs_trans *tp, + bool already_locked) { int i, j; struct xfs_dquot *dqp; @@ -671,10 +690,12 @@ xfs_trans_unreserve_and_mod_dquots( * about the number of blocks used field, or deltas. * Also we don't bother to zero the fields. */ - locked = false; + locked = already_locked; if (qtrx->qt_blk_res) { - xfs_dqlock(dqp); - locked = true; + if (!locked) { + xfs_dqlock(dqp); + locked = true; + } dqp->q_blk.reserved -= (xfs_qcnt_t)qtrx->qt_blk_res; } @@ -695,7 +716,7 @@ xfs_trans_unreserve_and_mod_dquots( dqp->q_rtb.reserved -= (xfs_qcnt_t)qtrx->qt_rtblk_res; } - if (locked) + if (locked && !already_locked) xfs_dqunlock(dqp); }

12 months

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FAILED: patch "[PATCH] xfs: don't lose solo dquot update transactions" failed to apply to 5.10-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x 07137e925fa951646325762bda6bd2503dfe64c6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121515-pursuant-reversion-cf82@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 07137e925fa951646325762bda6bd2503dfe64c6 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:36 -0800 Subject: [PATCH] xfs: don't lose solo dquot update transactions Quota counter updates are tracked via incore objects which hang off the xfs_trans object. These changes are then turned into dirty log items in xfs_trans_apply_dquot_deltas just prior to commiting the log items to the CIL. However, updating the incore deltas do not cause XFS_TRANS_DIRTY to be set on the transaction. In other words, a pure quota counter update will be silently discarded if there are no other dirty log items attached to the transaction. This is currently not the case anywhere in the filesystem because quota updates always dirty at least one other metadata item, but a subsequent bug fix will add dquot log item precommits, so we actually need a dirty dquot log item prior to xfs_trans_run_precommits. Also let's not leave a logic bomb. Cc: <stable(a)vger.kernel.org> # v2.6.35 Fixes: 0924378a689ccb ("xfs: split out iclog writing from xfs_trans_commit()") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index fa1317cc396c..d7565462af3d 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -101,7 +101,8 @@ extern void xfs_trans_free_dqinfo(struct xfs_trans *); extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, uint, int64_t); extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); -extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); +void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp, + bool already_locked); int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force); extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, @@ -173,7 +174,7 @@ static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, { } #define xfs_trans_apply_dquot_deltas(tp) -#define xfs_trans_unreserve_and_mod_dquots(tp) +#define xfs_trans_unreserve_and_mod_dquots(tp, a) static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force) diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 427a8ba0ab99..4cd25717c9d1 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -866,6 +866,7 @@ __xfs_trans_commit( */ if (tp->t_flags & XFS_TRANS_SB_DIRTY) xfs_trans_apply_sb_deltas(tp); + xfs_trans_apply_dquot_deltas(tp); error = xfs_trans_run_precommits(tp); if (error) @@ -894,11 +895,6 @@ __xfs_trans_commit( ASSERT(tp->t_ticket != NULL); - /* - * If we need to update the superblock, then do it now. - */ - xfs_trans_apply_dquot_deltas(tp); - xlog_cil_commit(log, tp, &commit_seq, regrant); xfs_trans_free(tp); @@ -924,7 +920,7 @@ __xfs_trans_commit( * the dqinfo portion to be. All that means is that we have some * (non-persistent) quota reservations that need to be unreserved. */ - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, true); if (tp->t_ticket) { if (regrant && !xlog_is_shutdown(log)) xfs_log_ticket_regrant(log, tp->t_ticket); @@ -1018,7 +1014,7 @@ xfs_trans_cancel( } #endif xfs_trans_unreserve_and_mod_sb(tp); - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, false); if (tp->t_ticket) { xfs_log_ticket_ungrant(log, tp->t_ticket); diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c index 481ba3dc9f19..713b6d243e56 100644 --- a/fs/xfs/xfs_trans_dquot.c +++ b/fs/xfs/xfs_trans_dquot.c @@ -606,6 +606,24 @@ xfs_trans_apply_dquot_deltas( ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); + + /* + * We've applied the count changes and given back + * whatever reservation we didn't use. Zero out the + * dqtrx fields. + */ + qtrx->qt_blk_res = 0; + qtrx->qt_bcount_delta = 0; + qtrx->qt_delbcnt_delta = 0; + + qtrx->qt_rtblk_res = 0; + qtrx->qt_rtblk_res_used = 0; + qtrx->qt_rtbcount_delta = 0; + qtrx->qt_delrtb_delta = 0; + + qtrx->qt_ino_res = 0; + qtrx->qt_ino_res_used = 0; + qtrx->qt_icount_delta = 0; } } } @@ -642,7 +660,8 @@ xfs_trans_unreserve_and_mod_dquots_hook( */ void xfs_trans_unreserve_and_mod_dquots( - struct xfs_trans *tp) + struct xfs_trans *tp, + bool already_locked) { int i, j; struct xfs_dquot *dqp; @@ -671,10 +690,12 @@ xfs_trans_unreserve_and_mod_dquots( * about the number of blocks used field, or deltas. * Also we don't bother to zero the fields. */ - locked = false; + locked = already_locked; if (qtrx->qt_blk_res) { - xfs_dqlock(dqp); - locked = true; + if (!locked) { + xfs_dqlock(dqp); + locked = true; + } dqp->q_blk.reserved -= (xfs_qcnt_t)qtrx->qt_blk_res; } @@ -695,7 +716,7 @@ xfs_trans_unreserve_and_mod_dquots( dqp->q_rtb.reserved -= (xfs_qcnt_t)qtrx->qt_rtblk_res; } - if (locked) + if (locked && !already_locked) xfs_dqunlock(dqp); }

12 months

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FAILED: patch "[PATCH] xfs: don't lose solo dquot update transactions" failed to apply to 5.15-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 07137e925fa951646325762bda6bd2503dfe64c6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121514-bagging-surplus-f572@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 07137e925fa951646325762bda6bd2503dfe64c6 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:36 -0800 Subject: [PATCH] xfs: don't lose solo dquot update transactions Quota counter updates are tracked via incore objects which hang off the xfs_trans object. These changes are then turned into dirty log items in xfs_trans_apply_dquot_deltas just prior to commiting the log items to the CIL. However, updating the incore deltas do not cause XFS_TRANS_DIRTY to be set on the transaction. In other words, a pure quota counter update will be silently discarded if there are no other dirty log items attached to the transaction. This is currently not the case anywhere in the filesystem because quota updates always dirty at least one other metadata item, but a subsequent bug fix will add dquot log item precommits, so we actually need a dirty dquot log item prior to xfs_trans_run_precommits. Also let's not leave a logic bomb. Cc: <stable(a)vger.kernel.org> # v2.6.35 Fixes: 0924378a689ccb ("xfs: split out iclog writing from xfs_trans_commit()") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index fa1317cc396c..d7565462af3d 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -101,7 +101,8 @@ extern void xfs_trans_free_dqinfo(struct xfs_trans *); extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, uint, int64_t); extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); -extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); +void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp, + bool already_locked); int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force); extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, @@ -173,7 +174,7 @@ static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, { } #define xfs_trans_apply_dquot_deltas(tp) -#define xfs_trans_unreserve_and_mod_dquots(tp) +#define xfs_trans_unreserve_and_mod_dquots(tp, a) static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force) diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 427a8ba0ab99..4cd25717c9d1 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -866,6 +866,7 @@ __xfs_trans_commit( */ if (tp->t_flags & XFS_TRANS_SB_DIRTY) xfs_trans_apply_sb_deltas(tp); + xfs_trans_apply_dquot_deltas(tp); error = xfs_trans_run_precommits(tp); if (error) @@ -894,11 +895,6 @@ __xfs_trans_commit( ASSERT(tp->t_ticket != NULL); - /* - * If we need to update the superblock, then do it now. - */ - xfs_trans_apply_dquot_deltas(tp); - xlog_cil_commit(log, tp, &commit_seq, regrant); xfs_trans_free(tp); @@ -924,7 +920,7 @@ __xfs_trans_commit( * the dqinfo portion to be. All that means is that we have some * (non-persistent) quota reservations that need to be unreserved. */ - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, true); if (tp->t_ticket) { if (regrant && !xlog_is_shutdown(log)) xfs_log_ticket_regrant(log, tp->t_ticket); @@ -1018,7 +1014,7 @@ xfs_trans_cancel( } #endif xfs_trans_unreserve_and_mod_sb(tp); - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, false); if (tp->t_ticket) { xfs_log_ticket_ungrant(log, tp->t_ticket); diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c index 481ba3dc9f19..713b6d243e56 100644 --- a/fs/xfs/xfs_trans_dquot.c +++ b/fs/xfs/xfs_trans_dquot.c @@ -606,6 +606,24 @@ xfs_trans_apply_dquot_deltas( ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); + + /* + * We've applied the count changes and given back + * whatever reservation we didn't use. Zero out the + * dqtrx fields. + */ + qtrx->qt_blk_res = 0; + qtrx->qt_bcount_delta = 0; + qtrx->qt_delbcnt_delta = 0; + + qtrx->qt_rtblk_res = 0; + qtrx->qt_rtblk_res_used = 0; + qtrx->qt_rtbcount_delta = 0; + qtrx->qt_delrtb_delta = 0; + + qtrx->qt_ino_res = 0; + qtrx->qt_ino_res_used = 0; + qtrx->qt_icount_delta = 0; } } } @@ -642,7 +660,8 @@ xfs_trans_unreserve_and_mod_dquots_hook( */ void xfs_trans_unreserve_and_mod_dquots( - struct xfs_trans *tp) + struct xfs_trans *tp, + bool already_locked) { int i, j; struct xfs_dquot *dqp; @@ -671,10 +690,12 @@ xfs_trans_unreserve_and_mod_dquots( * about the number of blocks used field, or deltas. * Also we don't bother to zero the fields. */ - locked = false; + locked = already_locked; if (qtrx->qt_blk_res) { - xfs_dqlock(dqp); - locked = true; + if (!locked) { + xfs_dqlock(dqp); + locked = true; + } dqp->q_blk.reserved -= (xfs_qcnt_t)qtrx->qt_blk_res; } @@ -695,7 +716,7 @@ xfs_trans_unreserve_and_mod_dquots( dqp->q_rtb.reserved -= (xfs_qcnt_t)qtrx->qt_rtblk_res; } - if (locked) + if (locked && !already_locked) xfs_dqunlock(dqp); }

12 months

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FAILED: patch "[PATCH] xfs: don't lose solo dquot update transactions" failed to apply to 6.1-stable tree

by gregkh＠linuxfoundation.org

The patch below does not apply to the 6.1-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <stable(a)vger.kernel.org>. To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.1.y git checkout FETCH_HEAD git cherry-pick -x 07137e925fa951646325762bda6bd2503dfe64c6 # <resolve conflicts, build, test, etc.> git commit -s git send-email --to '<stable(a)vger.kernel.org>' --in-reply-to '2024121513-porcupine-corporate-5dfe@gregkh' --subject-prefix 'PATCH 6.1.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ From 07137e925fa951646325762bda6bd2503dfe64c6 Mon Sep 17 00:00:00 2001 From: "Darrick J. Wong" <djwong(a)kernel.org> Date: Mon, 2 Dec 2024 10:57:36 -0800 Subject: [PATCH] xfs: don't lose solo dquot update transactions Quota counter updates are tracked via incore objects which hang off the xfs_trans object. These changes are then turned into dirty log items in xfs_trans_apply_dquot_deltas just prior to commiting the log items to the CIL. However, updating the incore deltas do not cause XFS_TRANS_DIRTY to be set on the transaction. In other words, a pure quota counter update will be silently discarded if there are no other dirty log items attached to the transaction. This is currently not the case anywhere in the filesystem because quota updates always dirty at least one other metadata item, but a subsequent bug fix will add dquot log item precommits, so we actually need a dirty dquot log item prior to xfs_trans_run_precommits. Also let's not leave a logic bomb. Cc: <stable(a)vger.kernel.org> # v2.6.35 Fixes: 0924378a689ccb ("xfs: split out iclog writing from xfs_trans_commit()") Signed-off-by: "Darrick J. Wong" <djwong(a)kernel.org> Reviewed-by: Christoph Hellwig <hch(a)lst.de> diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h index fa1317cc396c..d7565462af3d 100644 --- a/fs/xfs/xfs_quota.h +++ b/fs/xfs/xfs_quota.h @@ -101,7 +101,8 @@ extern void xfs_trans_free_dqinfo(struct xfs_trans *); extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, uint, int64_t); extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); -extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); +void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp, + bool already_locked); int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force); extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, @@ -173,7 +174,7 @@ static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, { } #define xfs_trans_apply_dquot_deltas(tp) -#define xfs_trans_unreserve_and_mod_dquots(tp) +#define xfs_trans_unreserve_and_mod_dquots(tp, a) static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, bool force) diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 427a8ba0ab99..4cd25717c9d1 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -866,6 +866,7 @@ __xfs_trans_commit( */ if (tp->t_flags & XFS_TRANS_SB_DIRTY) xfs_trans_apply_sb_deltas(tp); + xfs_trans_apply_dquot_deltas(tp); error = xfs_trans_run_precommits(tp); if (error) @@ -894,11 +895,6 @@ __xfs_trans_commit( ASSERT(tp->t_ticket != NULL); - /* - * If we need to update the superblock, then do it now. - */ - xfs_trans_apply_dquot_deltas(tp); - xlog_cil_commit(log, tp, &commit_seq, regrant); xfs_trans_free(tp); @@ -924,7 +920,7 @@ __xfs_trans_commit( * the dqinfo portion to be. All that means is that we have some * (non-persistent) quota reservations that need to be unreserved. */ - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, true); if (tp->t_ticket) { if (regrant && !xlog_is_shutdown(log)) xfs_log_ticket_regrant(log, tp->t_ticket); @@ -1018,7 +1014,7 @@ xfs_trans_cancel( } #endif xfs_trans_unreserve_and_mod_sb(tp); - xfs_trans_unreserve_and_mod_dquots(tp); + xfs_trans_unreserve_and_mod_dquots(tp, false); if (tp->t_ticket) { xfs_log_ticket_ungrant(log, tp->t_ticket); diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c index 481ba3dc9f19..713b6d243e56 100644 --- a/fs/xfs/xfs_trans_dquot.c +++ b/fs/xfs/xfs_trans_dquot.c @@ -606,6 +606,24 @@ xfs_trans_apply_dquot_deltas( ASSERT(dqp->q_blk.reserved >= dqp->q_blk.count); ASSERT(dqp->q_ino.reserved >= dqp->q_ino.count); ASSERT(dqp->q_rtb.reserved >= dqp->q_rtb.count); + + /* + * We've applied the count changes and given back + * whatever reservation we didn't use. Zero out the + * dqtrx fields. + */ + qtrx->qt_blk_res = 0; + qtrx->qt_bcount_delta = 0; + qtrx->qt_delbcnt_delta = 0; + + qtrx->qt_rtblk_res = 0; + qtrx->qt_rtblk_res_used = 0; + qtrx->qt_rtbcount_delta = 0; + qtrx->qt_delrtb_delta = 0; + + qtrx->qt_ino_res = 0; + qtrx->qt_ino_res_used = 0; + qtrx->qt_icount_delta = 0; } } } @@ -642,7 +660,8 @@ xfs_trans_unreserve_and_mod_dquots_hook( */ void xfs_trans_unreserve_and_mod_dquots( - struct xfs_trans *tp) + struct xfs_trans *tp, + bool already_locked) { int i, j; struct xfs_dquot *dqp; @@ -671,10 +690,12 @@ xfs_trans_unreserve_and_mod_dquots( * about the number of blocks used field, or deltas. * Also we don't bother to zero the fields. */ - locked = false; + locked = already_locked; if (qtrx->qt_blk_res) { - xfs_dqlock(dqp); - locked = true; + if (!locked) { + xfs_dqlock(dqp); + locked = true; + } dqp->q_blk.reserved -= (xfs_qcnt_t)qtrx->qt_blk_res; } @@ -695,7 +716,7 @@ xfs_trans_unreserve_and_mod_dquots( dqp->q_rtb.reserved -= (xfs_qcnt_t)qtrx->qt_rtblk_res; } - if (locked) + if (locked && !already_locked) xfs_dqunlock(dqp); }

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