/* * Copyright (c) 2013, 2014 * Phillip Lougher * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. */ #include #include #include #include #include #include "squashfs_fs.h" #include "squashfs_fs_sb.h" #include "squashfs.h" #include "decompressor.h" #include "page_actor.h" #define LZ4_LEGACY 1 struct lz4_comp_opts { __le32 version; __le32 flags; }; struct squashfs_lz4 { void *input; void *output; }; static void *lz4_comp_opts(struct squashfs_sb_info *msblk, void *buff, int len) { struct lz4_comp_opts *comp_opts = buff; /* LZ4 compressed filesystems always have compression options */ if (comp_opts == NULL || len < sizeof(*comp_opts)) return ERR_PTR(-EIO); if (le32_to_cpu(comp_opts->version) != LZ4_LEGACY) { /* LZ4 format currently used by the kernel is the 'legacy' * format */ ERROR("Unknown LZ4 version\n"); return ERR_PTR(-EINVAL); } return NULL; } static void *lz4_init(struct squashfs_sb_info *msblk, void *buff) { int block_size = max_t(int, msblk->block_size, SQUASHFS_METADATA_SIZE); struct squashfs_lz4 *stream; stream = kzalloc(sizeof(*stream), GFP_KERNEL); if (stream == NULL) goto failed; stream->input = vmalloc(block_size); if (stream->input == NULL) goto failed2; stream->output = vmalloc(block_size); if (stream->output == NULL) goto failed3; return stream; failed3: vfree(stream->input); failed2: kfree(stream); failed: ERROR("Failed to initialise LZ4 decompressor\n"); return ERR_PTR(-ENOMEM); } static void lz4_free(void *strm) { struct squashfs_lz4 *stream = strm; if (stream) { vfree(stream->input); vfree(stream->output); } kfree(stream); } static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm, struct buffer_head **bh, int b, int offset, int length, struct squashfs_page_actor *output) { struct squashfs_lz4 *stream = strm; void *buff = stream->input, *data; int avail, i, bytes = length, res; size_t dest_len = output->length; for (i = 0; i < b; i++) { avail = min(bytes, msblk->devblksize - offset); memcpy(buff, bh[i]->b_data + offset, avail); buff += avail; bytes -= avail; offset = 0; put_bh(bh[i]); } res = lz4_decompress_unknownoutputsize(stream->input, length, stream->output, &dest_len); if (res) return -EIO; bytes = dest_len; data = squashfs_first_page(output); buff = stream->output; while (data) { if (bytes <= PAGE_SIZE) { memcpy(data, buff, bytes); break; } memcpy(data, buff, PAGE_SIZE); buff += PAGE_SIZE; bytes -= PAGE_SIZE; data = squashfs_next_page(output); } squashfs_finish_page(output); return dest_len; } const struct squashfs_decompressor squashfs_lz4_comp_ops = { .init = lz4_init, .comp_opts = lz4_comp_opts, .free = lz4_free, .decompress = lz4_uncompress, .id = LZ4_COMPRESSION, .name = "lz4", .supported = 1 }; bd1beb4e7b5c94eca944be9cd23dfc752'>trace/events/hswadsp.h
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authorChristoph Hellwig <hch@lst.de>2017-01-30 13:15:41 +0100
committerBjorn Helgaas <bhelgaas@google.com>2017-02-02 10:35:46 -0600
commitdfef358bd1beb4e7b5c94eca944be9cd23dfc752 (patch)
treeb9a2afb38a4c2ac8ad31f49ec0d71fe9e5b1994c /include/trace/events/hswadsp.h
parent030305d69fc6963c16003f50d7e8d74b02d0a143 (diff)
PCI/MSI: Don't apply affinity if there aren't enough vectors left
Bart reported a problem wіth an out of bounds access in the low-level IRQ affinity code, which we root caused to the qla2xxx driver assigning all its MSI-X vectors to the pre and post vectors, and not having any left for the actually spread IRQs. Fix this issue by not asking for affinity assignment when there are no vectors to assign left. Fixes: 402723ad5c62 ("PCI/MSI: Provide pci_alloc_irq_vectors_affinity()") Link: https://lkml.kernel.org/r/1485359225.3093.3.camel@sandisk.com Reported-by: Bart Van Assche <bart.vanassche@sandisk.com> Tested-by: Bart Van Assche <bart.vanassche@sandisk.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'include/trace/events/hswadsp.h')