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Tsirkin" , Jason Wang , Xuan Zhuo , Eugenio =?iso-8859-1?Q?P=E9rez?= , Vivek Goyal , Dave Young , Thomas Huth , Cornelia Huck , Janosch Frank , Claudio Imbrenda , Eric Farman , Andrew Morton Subject: Re: [PATCH v1 04/11] fs/proc/vmcore: move vmcore definitions from kcore.h to crash_dump.h Message-ID: References: <20241025151134.1275575-1-david@redhat.com> <20241025151134.1275575-5-david@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20241025151134.1275575-5-david@redhat.com> X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 15266C0004 X-Stat-Signature: hy6hk8xq4wfc77md619jkfow4wusswkd X-Rspam-User: X-HE-Tag: 1731663858-987406 X-HE-Meta: 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 oRQiObyq GJn5eRmdU4G3/TnmiYbotIVb4roHFdIeRZqYTq+gcr/KLqgccSLmd5PnlY5qOe/30ESaHk5znd7mbAi/VCXkUbtoZ+TB8ijwMysaDwfIZMuNCTcV2fHk9lg/zuLZzmAauy30PNjn9XJ3s0DUFjupKDIWf3StsSn8+dTfqJW2yQRJFv5llIXMtz6p4IR/VVRVXTRnn8gEnQRCJuzbG7lJx9O7Aq2DAj9wSuLzhNYIw/ioSfWBkPEBRfBshHvko40CsM2E7xD5ygHYMwuhar4Tn3brCH/Cx+MeZRjNTmn9N2x+b0cY3Vie7v7ck1AxefmkmfUWHVoqW4mKC5zOIY9jcHw909QL9H93f6tkVOS+YJL1rTHAooMzJEl0noK5ae+/xCWrX+ZTJI0h/6xVf1bYjjhGEQASx3UdX0qA1Qs1t7ZW2FZY= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10/25/24 at 05:11pm, David Hildenbrand wrote: > These defines are not related to /proc/kcore, move them to crash_dump.h > instead. While at it, rename "struct vmcore" to "struct > vmcore_mem_node", which is a more fitting name. Agree it's inappropriate to put the defintions in kcore.h. However for 'struct vmcore', it's only used in fs/proc/vmcore.c from my code serching, do you think if we can put it in fs/proc/vmcore.c directly? And 'struct vmcoredd_node' too. And about the renaming, with my understanding each instance of struct vmcore represents one memory region, isn't it a little confusing to be called vmcore_mem_node? I understand you probablly want to unify the vmcore and vmcoredd's naming. I have to admit I don't know vmcoredd well and its naming, while most of people have been knowing vmcore representing memory region very well. > > Signed-off-by: David Hildenbrand > --- > fs/proc/vmcore.c | 20 ++++++++++---------- > include/linux/crash_dump.h | 13 +++++++++++++ > include/linux/kcore.h | 13 ------------- > 3 files changed, 23 insertions(+), 23 deletions(-) > > diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c > index 6371dbaa21be..47652df95202 100644 > --- a/fs/proc/vmcore.c > +++ b/fs/proc/vmcore.c > @@ -304,10 +304,10 @@ static int vmcoredd_mmap_dumps(struct vm_area_struct *vma, unsigned long dst, > */ > static ssize_t __read_vmcore(struct iov_iter *iter, loff_t *fpos) > { > + struct vmcore_mem_node *m = NULL; > ssize_t acc = 0, tmp; > size_t tsz; > u64 start; > - struct vmcore *m = NULL; > > if (!iov_iter_count(iter) || *fpos >= vmcore_size) > return 0; > @@ -560,8 +560,8 @@ static int vmcore_remap_oldmem_pfn(struct vm_area_struct *vma, > static int mmap_vmcore(struct file *file, struct vm_area_struct *vma) > { > size_t size = vma->vm_end - vma->vm_start; > + struct vmcore_mem_node *m; > u64 start, end, len, tsz; > - struct vmcore *m; > > start = (u64)vma->vm_pgoff << PAGE_SHIFT; > end = start + size; > @@ -683,16 +683,16 @@ static const struct proc_ops vmcore_proc_ops = { > .proc_mmap = mmap_vmcore, > }; > > -static struct vmcore* __init get_new_element(void) > +static struct vmcore_mem_node * __init get_new_element(void) > { > - return kzalloc(sizeof(struct vmcore), GFP_KERNEL); > + return kzalloc(sizeof(struct vmcore_mem_node), GFP_KERNEL); > } > > static u64 get_vmcore_size(size_t elfsz, size_t elfnotesegsz, > struct list_head *vc_list) > { > + struct vmcore_mem_node *m; > u64 size; > - struct vmcore *m; > > size = elfsz + elfnotesegsz; > list_for_each_entry(m, vc_list, list) { > @@ -1090,11 +1090,11 @@ static int __init process_ptload_program_headers_elf64(char *elfptr, > size_t elfnotes_sz, > struct list_head *vc_list) > { > + struct vmcore_mem_node *new; > int i; > Elf64_Ehdr *ehdr_ptr; > Elf64_Phdr *phdr_ptr; > loff_t vmcore_off; > - struct vmcore *new; > > ehdr_ptr = (Elf64_Ehdr *)elfptr; > phdr_ptr = (Elf64_Phdr*)(elfptr + sizeof(Elf64_Ehdr)); /* PT_NOTE hdr */ > @@ -1133,11 +1133,11 @@ static int __init process_ptload_program_headers_elf32(char *elfptr, > size_t elfnotes_sz, > struct list_head *vc_list) > { > + struct vmcore_mem_node *new; > int i; > Elf32_Ehdr *ehdr_ptr; > Elf32_Phdr *phdr_ptr; > loff_t vmcore_off; > - struct vmcore *new; > > ehdr_ptr = (Elf32_Ehdr *)elfptr; > phdr_ptr = (Elf32_Phdr*)(elfptr + sizeof(Elf32_Ehdr)); /* PT_NOTE hdr */ > @@ -1175,8 +1175,8 @@ static int __init process_ptload_program_headers_elf32(char *elfptr, > static void set_vmcore_list_offsets(size_t elfsz, size_t elfnotes_sz, > struct list_head *vc_list) > { > + struct vmcore_mem_node *m; > loff_t vmcore_off; > - struct vmcore *m; > > /* Skip ELF header, program headers and ELF note segment. */ > vmcore_off = elfsz + elfnotes_sz; > @@ -1587,9 +1587,9 @@ void vmcore_cleanup(void) > > /* clear the vmcore list. */ > while (!list_empty(&vmcore_list)) { > - struct vmcore *m; > + struct vmcore_mem_node *m; > > - m = list_first_entry(&vmcore_list, struct vmcore, list); > + m = list_first_entry(&vmcore_list, struct vmcore_mem_node, list); > list_del(&m->list); > kfree(m); > } > diff --git a/include/linux/crash_dump.h b/include/linux/crash_dump.h > index acc55626afdc..5e48ab12c12b 100644 > --- a/include/linux/crash_dump.h > +++ b/include/linux/crash_dump.h > @@ -114,10 +114,23 @@ struct vmcore_cb { > extern void register_vmcore_cb(struct vmcore_cb *cb); > extern void unregister_vmcore_cb(struct vmcore_cb *cb); > > +struct vmcore_mem_node { > + struct list_head list; > + unsigned long long paddr; > + unsigned long long size; > + loff_t offset; > +}; > + > #else /* !CONFIG_CRASH_DUMP */ > static inline bool is_kdump_kernel(void) { return false; } > #endif /* CONFIG_CRASH_DUMP */ > > +struct vmcoredd_node { > + struct list_head list; /* List of dumps */ > + void *buf; /* Buffer containing device's dump */ > + unsigned int size; /* Size of the buffer */ > +}; > + > /* Device Dump information to be filled by drivers */ > struct vmcoredd_data { > char dump_name[VMCOREDD_MAX_NAME_BYTES]; /* Unique name of the dump */ > diff --git a/include/linux/kcore.h b/include/linux/kcore.h > index 86c0f1d18998..9a2fa013c91d 100644 > --- a/include/linux/kcore.h > +++ b/include/linux/kcore.h > @@ -20,19 +20,6 @@ struct kcore_list { > int type; > }; > > -struct vmcore { > - struct list_head list; > - unsigned long long paddr; > - unsigned long long size; > - loff_t offset; > -}; > - > -struct vmcoredd_node { > - struct list_head list; /* List of dumps */ > - void *buf; /* Buffer containing device's dump */ > - unsigned int size; /* Size of the buffer */ > -}; > - > #ifdef CONFIG_PROC_KCORE > void __init kclist_add(struct kcore_list *, void *, size_t, int type); > > -- > 2.46.1 >