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Fri, 27 Sep 2024 00:51:32 +0000 (GMT) Received: from smtpav05.dal12v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 9978258052; Fri, 27 Sep 2024 00:51:31 +0000 (GMT) Received: from localhost.localdomain (unknown [9.61.154.26]) by smtpav05.dal12v.mail.ibm.com (Postfix) with ESMTP; Fri, 27 Sep 2024 00:51:31 +0000 (GMT) From: jrossi@linux.ibm.com To: qemu-devel@nongnu.org, qemu-s390x@nongnu.org, thuth@redhat.com Cc: frankja@linux.ibm.com, jrossi@linux.ibm.com Subject: [PATCH 07/18] pc-bios/s390-ccw: Remove panics from ISO IPL path Date: Thu, 26 Sep 2024 20:51:06 -0400 Message-ID: <20240927005117.1679506-8-jrossi@linux.ibm.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20240927005117.1679506-1-jrossi@linux.ibm.com> References: <20240927005117.1679506-1-jrossi@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: 2ZMoI_vBPRknGVIisghN12sToXkb8bXc X-Proofpoint-GUID: JR7qrnI8j-SnpU_apVEXbbYTH-RK6A1O X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-26_06,2024-09-26_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 mlxlogscore=999 priorityscore=1501 suspectscore=0 mlxscore=0 clxscore=1015 impostorscore=0 malwarescore=0 bulkscore=0 spamscore=0 phishscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2408220000 definitions=main-2409270002 Received-SPF: pass client-ip=148.163.158.5; envelope-from=jrossi@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -19 X-Spam_score: -2.0 X-Spam_bar: -- X-Spam_report: (-2.0 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Jared Rossi Remove panic-on-error from IPL ISO El Torito specific functions so that error recovery may be possible in the future. Functions that would previously panic now provide a return code. Signed-off-by: Jared Rossi --- pc-bios/s390-ccw/bootmap.h | 17 +++++++--- pc-bios/s390-ccw/s390-ccw.h | 1 + pc-bios/s390-ccw/bootmap.c | 64 ++++++++++++++++++++++++------------- 3 files changed, 55 insertions(+), 27 deletions(-) diff --git a/pc-bios/s390-ccw/bootmap.h b/pc-bios/s390-ccw/bootmap.h index bbe2c132aa..cb5346829b 100644 --- a/pc-bios/s390-ccw/bootmap.h +++ b/pc-bios/s390-ccw/bootmap.h @@ -385,17 +385,24 @@ static inline uint32_t iso_733_to_u32(uint64_t x) #define ISO_PRIMARY_VD_SECTOR 16 -static inline void read_iso_sector(uint32_t block_offset, void *buf, +static inline int read_iso_sector(uint32_t block_offset, void *buf, const char *errmsg) { - IPL_assert(virtio_read_many(block_offset, buf, 1) == 0, errmsg); + if (virtio_read(block_offset, buf)) { + puts(errmsg); + return 1; + } + return 0; } -static inline void read_iso_boot_image(uint32_t block_offset, void *load_addr, +static inline int read_iso_boot_image(uint32_t block_offset, void *load_addr, uint32_t blks_to_load) { - IPL_assert(virtio_read_many(block_offset, load_addr, blks_to_load) == 0, - "Failed to read boot image!"); + if (!virtio_read_many(block_offset, load_addr, blks_to_load)) { + puts("Failed to read boot image!"); + return 1; + } + return 0; } #define ISO9660_MAX_DIR_DEPTH 8 diff --git a/pc-bios/s390-ccw/s390-ccw.h b/pc-bios/s390-ccw/s390-ccw.h index 0ed7eb8ade..cbd92f3671 100644 --- a/pc-bios/s390-ccw/s390-ccw.h +++ b/pc-bios/s390-ccw/s390-ccw.h @@ -30,6 +30,7 @@ typedef unsigned long long u64; #define EIO 1 #define EBUSY 2 #define ENODEV 3 +#define EINVAL 4 #ifndef MIN #define MIN(a, b) (((a) < (b)) ? (a) : (b)) diff --git a/pc-bios/s390-ccw/bootmap.c b/pc-bios/s390-ccw/bootmap.c index 414c3f1b47..31cf0f6d97 100644 --- a/pc-bios/s390-ccw/bootmap.c +++ b/pc-bios/s390-ccw/bootmap.c @@ -678,8 +678,10 @@ static bool is_iso_bc_entry_compatible(IsoBcSection *s) if (s->unused || !s->sector_count) { return false; } - read_iso_sector(bswap32(s->load_rba), magic_sec, - "Failed to read image sector 0"); + if (read_iso_sector(bswap32(s->load_rba), magic_sec, + "Failed to read image sector 0")) { + return false; + } /* Checking bytes 8 - 32 for S390 Linux magic */ return !memcmp(magic_sec + 8, linux_s390_magic, 24); @@ -706,14 +708,18 @@ static inline uint32_t iso_get_file_size(uint32_t load_rba) sec_offset[0] = 0; while (level >= 0) { - IPL_assert(sec_offset[level] <= ISO_SECTOR_SIZE, - "Directory tree structure violation"); + if (sec_offset[level] > ISO_SECTOR_SIZE) { + puts("Directory tree structure violation"); + return -EIO; + } cur_record = (IsoDirHdr *)(temp + sec_offset[level]); if (sec_offset[level] == 0) { - read_iso_sector(sec_loc[level], temp, - "Failed to read ISO directory"); + if (virtio_read(sec_loc[level], temp)) { + puts("Failed to read ISO directory"); + return -EIO; + } if (dir_rem[level] == 0) { /* Skip self and parent records */ dir_rem[level] = iso_733_to_u32(cur_record->data_len) - @@ -784,9 +790,11 @@ static void load_iso_bc_entry(IsoBcSection *load) puts("ISO boot image size could not be verified"); } - read_iso_boot_image(bswap32(s.load_rba), + if (read_iso_boot_image(bswap32(s.load_rba), (void *)((uint64_t)bswap16(s.load_segment)), - blks_to_load); + blks_to_load)) { + return; + } jump_to_low_kernel(); } @@ -809,17 +817,18 @@ static uint32_t find_iso_bc(void) return bswap32(et->bc_offset); } } - read_iso_sector(block_num++, sec, - "Failed to read ISO volume descriptor"); + if (read_iso_sector(block_num++, sec, + "Failed to read ISO volume descriptor")) { + return 0; + } } return 0; } -static IsoBcSection *find_iso_bc_entry(void) +static IsoBcSection *find_iso_bc_entry(uint32_t offset) { IsoBcEntry *e = (IsoBcEntry *)sec; - uint32_t offset = find_iso_bc(); int i; unsigned int loadparm = get_loadparm_index(); @@ -827,11 +836,12 @@ static IsoBcSection *find_iso_bc_entry(void) return NULL; } - read_iso_sector(offset, sec, "Failed to read El Torito boot catalog"); + if (read_iso_sector(offset, sec, "Failed to read El Torito boot catalog")) { + return NULL; + } if (!is_iso_bc_valid(e)) { /* The validation entry is mandatory */ - panic("No valid boot catalog found!\n"); return NULL; } @@ -851,19 +861,25 @@ static IsoBcSection *find_iso_bc_entry(void) } } - panic("No suitable boot entry found on ISO-9660 media!\n"); - return NULL; } -static void ipl_iso_el_torito(void) +static int ipl_iso_el_torito(void) { - IsoBcSection *s = find_iso_bc_entry(); + uint32_t offset = find_iso_bc(); + if (!offset) { + return 0; + } + + IsoBcSection *s = find_iso_bc_entry(offset); if (s) { - load_iso_bc_entry(s); - /* no return */ + load_iso_bc_entry(s); /* only return in error */ + return 1; } + + puts("No suitable boot entry found on ISO-9660 media!"); + return -EIO; } /** @@ -893,7 +909,9 @@ static void zipl_load_vblk(void) if (blksize != VIRTIO_ISO_BLOCK_SIZE) { virtio_assume_iso9660(); } - ipl_iso_el_torito(); + if (ipl_iso_el_torito()) { + return; + } } if (blksize != VIRTIO_DASD_DEFAULT_BLOCK_SIZE) { @@ -907,7 +925,9 @@ static void zipl_load_vscsi(void) { if (virtio_get_block_size() == VIRTIO_ISO_BLOCK_SIZE) { /* Is it an ISO image in non-CD drive? */ - ipl_iso_el_torito(); + if (ipl_iso_el_torito()) { + return; + } } puts("Using guessed DASD geometry.");