From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [85.21.88.2] (helo=mail.dev.rtsoft.ru) by canuck.infradead.org with smtp (Exim 4.62 #1 (Red Hat Linux)) id 1GiXMK-00062C-Cr for linux-mtd@lists.infradead.org; Fri, 10 Nov 2006 09:28:04 -0500 Message-ID: <45548C7C.6030708@ru.mvista.com> Date: Fri, 10 Nov 2006 17:28:12 +0300 From: Vitaly Wool MIME-Version: 1.0 To: dedekind@infradead.org Subject: Re: [PATCH/RFC] remove len/ooblen confusion in MTD/NAND code: respin References: <20061103182038.f528d960.vwool@ru.mvista.com> <1162916453.5628.2.camel@sauron> In-Reply-To: <1162916453.5628.2.camel@sauron> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Cc: linux-mtd@lists.infradead.org List-Id: Linux MTD discussion mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Artem Bityutskiy wrote: >this patch does not apply to mtd-2.6.git: > > Oh stupid me, I've posted the wrong patch. :( Here's the right one. drivers/mtd/inftlcore.c | 6 +---- drivers/mtd/mtdchar.c | 12 ++++------ drivers/mtd/mtdconcat.c | 39 ++++++++++++++++++++------------ drivers/mtd/mtdpart.c | 4 +-- drivers/mtd/nand/nand_base.c | 51 +++++++++++++++++++++++++++++-------------- drivers/mtd/nand/nand_bbt.c | 5 +--- drivers/mtd/nftlcore.c | 6 +---- drivers/mtd/ssfdc.c | 5 +--- fs/jffs2/wbuf.c | 21 +++++++---------- include/linux/mtd/mtd.h | 12 ++++------ 10 files changed, 88 insertions(+), 73 deletions(-) Signed-off-by: Vitaly Wool Index: mtd/drivers/mtd/inftlcore.c =================================================================== --- mtd.orig/drivers/mtd/inftlcore.c +++ mtd/drivers/mtd/inftlcore.c @@ -163,10 +163,9 @@ int inftl_read_oob(struct mtd_info *mtd, ops.ooblen = len; ops.oobbuf = buf; ops.datbuf = NULL; - ops.len = len; res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops); - *retlen = ops.retlen; + *retlen = ops.oobretlen; return res; } @@ -184,10 +183,9 @@ int inftl_write_oob(struct mtd_info *mtd ops.ooblen = len; ops.oobbuf = buf; ops.datbuf = NULL; - ops.len = len; res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops); - *retlen = ops.retlen; + *retlen = ops.oobretlen; return res; } Index: mtd/drivers/mtd/nand/nand_base.c =================================================================== --- mtd.orig/drivers/mtd/nand/nand_base.c +++ mtd/drivers/mtd/nand/nand_base.c @@ -897,12 +897,11 @@ static int nand_read_page_syndrome(struc * @chip: nand chip structure * @oob: oob destination address * @ops: oob ops structure + * @len: size of oob to transfer */ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, - struct mtd_oob_ops *ops) + struct mtd_oob_ops *ops, size_t len) { - size_t len = ops->ooblen; - switch(ops->mode) { case MTD_OOB_PLACE: @@ -960,6 +959,7 @@ static int nand_do_read_ops(struct mtd_i int sndcmd = 1; int ret = 0; uint32_t readlen = ops->len; + uint32_t oobreadlen = ops->ooblen; uint8_t *bufpoi, *oob, *buf; stats = mtd->ecc_stats; @@ -1006,10 +1006,17 @@ static int nand_do_read_ops(struct mtd_i if (unlikely(oob)) { /* Raw mode does data:oob:data:oob */ - if (ops->mode != MTD_OOB_RAW) - oob = nand_transfer_oob(chip, oob, ops); - else - buf = nand_transfer_oob(chip, buf, ops); + if (ops->mode != MTD_OOB_RAW) { + int toread = min(oobreadlen, + chip->ecc.layout->oobavail); + if (toread) { + oob = nand_transfer_oob(chip, + oob, ops, toread); + oobreadlen -= toread; + } + } else + buf = nand_transfer_oob(chip, + buf, ops, mtd->oobsize); } if (!(chip->options & NAND_NO_READRDY)) { @@ -1056,6 +1063,8 @@ static int nand_do_read_ops(struct mtd_i } ops->retlen = ops->len - (size_t) readlen; + if (oob) + ops->oobretlen = ops->ooblen - oobreadlen; if (ret) return ret; @@ -1256,12 +1265,18 @@ static int nand_do_read_oob(struct mtd_i int page, realpage, chipnr, sndcmd = 1; struct nand_chip *chip = mtd->priv; int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; - int readlen = ops->len; + int readlen = ops->ooblen; + int len; uint8_t *buf = ops->oobbuf; DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n", (unsigned long long)from, readlen); + if (ops->mode == MTD_OOB_RAW) + len = mtd->oobsize; + else + len = chip->ecc.layout->oobavail; + chipnr = (int)(from >> chip->chip_shift); chip->select_chip(mtd, chipnr); @@ -1271,7 +1286,9 @@ static int nand_do_read_oob(struct mtd_i while(1) { sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); - buf = nand_transfer_oob(chip, buf, ops); + + len = min(len, readlen); + buf = nand_transfer_oob(chip, buf, ops, len); if (!(chip->options & NAND_NO_READRDY)) { /* @@ -1286,7 +1303,7 @@ static int nand_do_read_oob(struct mtd_i nand_wait_ready(mtd); } - readlen -= ops->ooblen; + readlen -= len; if (!readlen) break; @@ -1308,7 +1325,7 @@ static int nand_do_read_oob(struct mtd_i sndcmd = 1; } - ops->retlen = ops->len; + ops->oobretlen = ops->ooblen; return 0; } @@ -1329,7 +1346,7 @@ static int nand_read_oob(struct mtd_info ops->retlen = 0; /* Do not allow reads past end of device */ - if ((from + ops->len) > mtd->size) { + if (ops->datbuf && (from + ops->len) > mtd->size) { DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " "Attempt read beyond end of device\n"); return -EINVAL; @@ -1655,6 +1672,8 @@ static int nand_do_write_ops(struct mtd_ } ops->retlen = ops->len - writelen; + if (unlikely(oob)) + ops->oobretlen = ops->ooblen; return ret; } @@ -1710,10 +1729,10 @@ static int nand_do_write_oob(struct mtd_ struct nand_chip *chip = mtd->priv; DEBUG(MTD_DEBUG_LEVEL3, "nand_write_oob: to = 0x%08x, len = %i\n", - (unsigned int)to, (int)ops->len); + (unsigned int)to, (int)ops->ooblen); /* Do not allow write past end of page */ - if ((ops->ooboffs + ops->len) > mtd->oobsize) { + if ((ops->ooboffs + ops->ooblen) > mtd->oobsize) { DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " "Attempt to write past end of page\n"); return -EINVAL; @@ -1749,7 +1768,7 @@ static int nand_do_write_oob(struct mtd_ if (status) return status; - ops->retlen = ops->len; + ops->oobretlen = ops->ooblen; return 0; } @@ -1769,7 +1788,7 @@ static int nand_write_oob(struct mtd_inf ops->retlen = 0; /* Do not allow writes past end of device */ - if ((to + ops->len) > mtd->size) { + if (ops->datbuf && (to + ops->len) > mtd->size) { DEBUG(MTD_DEBUG_LEVEL0, "nand_read_oob: " "Attempt read beyond end of device\n"); return -EINVAL; Index: mtd/drivers/mtd/mtdchar.c =================================================================== --- mtd.orig/drivers/mtd/mtdchar.c +++ mtd/drivers/mtd/mtdchar.c @@ -499,13 +499,12 @@ static int mtd_ioctl(struct inode *inode if (ret) return ret; - ops.len = buf.length; ops.ooblen = buf.length; ops.ooboffs = buf.start & (mtd->oobsize - 1); ops.datbuf = NULL; ops.mode = MTD_OOB_PLACE; - if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs)) + if (ops.ooboffs && ops.ooblen > (mtd->oobsize - ops.ooboffs)) return -EINVAL; ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); @@ -520,7 +519,7 @@ static int mtd_ioctl(struct inode *inode buf.start &= ~(mtd->oobsize - 1); ret = mtd->write_oob(mtd, buf.start, &ops); - if (copy_to_user(argp + sizeof(uint32_t), &ops.retlen, + if (copy_to_user(argp + sizeof(uint32_t), &ops.oobretlen, sizeof(uint32_t))) ret = -EFAULT; @@ -548,7 +547,6 @@ static int mtd_ioctl(struct inode *inode if (ret) return ret; - ops.len = buf.length; ops.ooblen = buf.length; ops.ooboffs = buf.start & (mtd->oobsize - 1); ops.datbuf = NULL; @@ -564,10 +562,10 @@ static int mtd_ioctl(struct inode *inode buf.start &= ~(mtd->oobsize - 1); ret = mtd->read_oob(mtd, buf.start, &ops); - if (put_user(ops.retlen, (uint32_t __user *)argp)) + if (put_user(ops.oobretlen, (uint32_t __user *)argp)) ret = -EFAULT; - else if (ops.retlen && copy_to_user(buf.ptr, ops.oobbuf, - ops.retlen)) + else if (ops.oobretlen && copy_to_user(buf.ptr, ops.oobbuf, + ops.oobretlen)) ret = -EFAULT; kfree(ops.oobbuf); Index: mtd/drivers/mtd/mtdconcat.c =================================================================== --- mtd.orig/drivers/mtd/mtdconcat.c +++ mtd/drivers/mtd/mtdconcat.c @@ -247,7 +247,7 @@ concat_read_oob(struct mtd_info *mtd, lo struct mtd_oob_ops devops = *ops; int i, err, ret = 0; - ops->retlen = 0; + ops->retlen = ops->oobretlen = 0; for (i = 0; i < concat->num_subdev; i++) { struct mtd_info *subdev = concat->subdev[i]; @@ -263,6 +263,7 @@ concat_read_oob(struct mtd_info *mtd, lo err = subdev->read_oob(subdev, from, &devops); ops->retlen += devops.retlen; + ops->oobretlen += devops.oobretlen; /* Save information about bitflips! */ if (unlikely(err)) { @@ -278,14 +279,18 @@ concat_read_oob(struct mtd_info *mtd, lo return err; } - devops.len = ops->len - ops->retlen; - if (!devops.len) - return ret; - - if (devops.datbuf) + if (devops.datbuf) { + devops.len = ops->len - ops->retlen; + if (!devops.len) + return ret; devops.datbuf += devops.retlen; - if (devops.oobbuf) - devops.oobbuf += devops.ooblen; + } + if (devops.oobbuf) { + devops.ooblen = ops->ooblen - ops->oobretlen; + if (!devops.ooblen) + return ret; + devops.oobbuf += ops->oobretlen; + } from = 0; } @@ -321,14 +326,18 @@ concat_write_oob(struct mtd_info *mtd, l if (err) return err; - devops.len = ops->len - ops->retlen; - if (!devops.len) - return 0; - - if (devops.datbuf) + if (devops.datbuf) { + devops.len = ops->len - ops->retlen; + if (!devops.len) + return 0; devops.datbuf += devops.retlen; - if (devops.oobbuf) - devops.oobbuf += devops.ooblen; + } + if (devops.oobbuf) { + devops.ooblen = ops->ooblen - ops->oobretlen; + if (!devops.ooblen) + return 0; + devops.oobbuf += devops.oobretlen; + } to = 0; } return -EINVAL; Index: mtd/drivers/mtd/nand/nand_bbt.c =================================================================== --- mtd.orig/drivers/mtd/nand/nand_bbt.c +++ mtd/drivers/mtd/nand/nand_bbt.c @@ -333,7 +333,6 @@ static int scan_block_fast(struct mtd_in struct mtd_oob_ops ops; int j, ret; - ops.len = mtd->oobsize; ops.ooblen = mtd->oobsize; ops.oobbuf = buf; ops.ooboffs = 0; @@ -676,10 +675,10 @@ static int write_bbt(struct mtd_info *mt "bad block table\n"); } /* Read oob data */ - ops.len = (len >> this->page_shift) * mtd->oobsize; + ops.ooblen = (len >> this->page_shift) * mtd->oobsize; ops.oobbuf = &buf[len]; res = mtd->read_oob(mtd, to + mtd->writesize, &ops); - if (res < 0 || ops.retlen != ops.len) + if (res < 0 || ops.oobretlen != ops.ooblen) goto outerr; /* Calc the byte offset in the buffer */ Index: mtd/drivers/mtd/nftlcore.c =================================================================== --- mtd.orig/drivers/mtd/nftlcore.c +++ mtd/drivers/mtd/nftlcore.c @@ -147,10 +147,9 @@ int nftl_read_oob(struct mtd_info *mtd, ops.ooblen = len; ops.oobbuf = buf; ops.datbuf = NULL; - ops.len = len; res = mtd->read_oob(mtd, offs & ~(mtd->writesize - 1), &ops); - *retlen = ops.retlen; + *retlen = ops.oobretlen; return res; } @@ -168,10 +167,9 @@ int nftl_write_oob(struct mtd_info *mtd, ops.ooblen = len; ops.oobbuf = buf; ops.datbuf = NULL; - ops.len = len; res = mtd->write_oob(mtd, offs & ~(mtd->writesize - 1), &ops); - *retlen = ops.retlen; + *retlen = ops.oobretlen; return res; } Index: mtd/drivers/mtd/ssfdc.c =================================================================== --- mtd.orig/drivers/mtd/ssfdc.c +++ mtd/drivers/mtd/ssfdc.c @@ -172,13 +172,12 @@ static int read_raw_oob(struct mtd_info ops.mode = MTD_OOB_RAW; ops.ooboffs = 0; - ops.ooblen = mtd->oobsize; - ops.len = OOB_SIZE; + ops.ooblen = OOB_SIZE; ops.oobbuf = buf; ops.datbuf = NULL; ret = mtd->read_oob(mtd, offs, &ops); - if (ret < 0 || ops.retlen != OOB_SIZE) + if (ret < 0 || ops.oobretlen != OOB_SIZE) return -1; return 0; Index: mtd/fs/jffs2/wbuf.c =================================================================== --- mtd.orig/fs/jffs2/wbuf.c +++ mtd/fs/jffs2/wbuf.c @@ -968,8 +968,7 @@ int jffs2_check_oob_empty(struct jffs2_s int oobsize = c->mtd->oobsize; struct mtd_oob_ops ops; - ops.len = NR_OOB_SCAN_PAGES * oobsize; - ops.ooblen = oobsize; + ops.ooblen = NR_OOB_SCAN_PAGES * oobsize; ops.oobbuf = c->oobbuf; ops.ooboffs = 0; ops.datbuf = NULL; @@ -982,10 +981,10 @@ int jffs2_check_oob_empty(struct jffs2_s return ret; } - if (ops.retlen < ops.len) { + if (ops.oobretlen < ops.ooblen) { D1(printk(KERN_WARNING "jffs2_check_oob_empty(): Read OOB " "returned short read (%zd bytes not %d) for block " - "at %08x\n", ops.retlen, ops.len, jeb->offset)); + "at %08x\n", ops.oobretlen, ops.ooblen, jeb->offset)); return -EIO; } @@ -1004,7 +1003,7 @@ int jffs2_check_oob_empty(struct jffs2_s } /* we know, we are aligned :) */ - for (page = oobsize; page < ops.len; page += sizeof(long)) { + for (page = oobsize; page < ops.ooblen; page += sizeof(long)) { long dat = *(long *)(&ops.oobbuf[page]); if(dat != -1) return 1; @@ -1032,7 +1031,6 @@ int jffs2_check_nand_cleanmarker (struct return 2; } - ops.len = oobsize; ops.ooblen = oobsize; ops.oobbuf = c->oobbuf; ops.ooboffs = 0; @@ -1047,10 +1045,10 @@ int jffs2_check_nand_cleanmarker (struct return ret; } - if (ops.retlen < ops.len) { + if (ops.oobretlen < ops.ooblen) { D1 (printk (KERN_WARNING "jffs2_check_nand_cleanmarker(): " "Read OOB return short read (%zd bytes not %d) " - "for block at %08x\n", ops.retlen, ops.len, + "for block at %08x\n", ops.oobretlen, ops.ooblen, jeb->offset)); return -EIO; } @@ -1089,8 +1087,7 @@ int jffs2_write_nand_cleanmarker(struct n.nodetype = cpu_to_je16(JFFS2_NODETYPE_CLEANMARKER); n.totlen = cpu_to_je32(8); - ops.len = c->fsdata_len; - ops.ooblen = c->fsdata_len;; + ops.ooblen = c->fsdata_len; ops.oobbuf = (uint8_t *)&n; ops.ooboffs = c->fsdata_pos; ops.datbuf = NULL; @@ -1104,10 +1101,10 @@ int jffs2_write_nand_cleanmarker(struct jeb->offset, ret)); return ret; } - if (ops.retlen != ops.len) { + if (ops.oobretlen != ops.ooblen) { D1(printk(KERN_WARNING "jffs2_write_nand_cleanmarker(): " "Short write for block at %08x: %zd not %d\n", - jeb->offset, ops.retlen, ops.len)); + jeb->offset, ops.oobretlen, ops.ooblen)); return -EIO; } return 0; Index: mtd/drivers/mtd/mtdpart.c =================================================================== --- mtd.orig/drivers/mtd/mtdpart.c +++ mtd/drivers/mtd/mtdpart.c @@ -94,7 +94,7 @@ static int part_read_oob(struct mtd_info if (from >= mtd->size) return -EINVAL; - if (from + ops->len > mtd->size) + if (ops->datbuf && from + ops->len > mtd->size) return -EINVAL; res = part->master->read_oob(part->master, from + part->offset, ops); @@ -161,7 +161,7 @@ static int part_write_oob(struct mtd_inf if (to >= mtd->size) return -EINVAL; - if (to + ops->len > mtd->size) + if (ops->datbuf && to + ops->len > mtd->size) return -EINVAL; return part->master->write_oob(part->master, to + part->offset, ops); } Index: mtd/include/linux/mtd/mtd.h =================================================================== --- mtd.orig/include/linux/mtd/mtd.h +++ mtd/include/linux/mtd/mtd.h @@ -75,15 +75,12 @@ typedef enum { * struct mtd_oob_ops - oob operation operands * @mode: operation mode * - * @len: number of bytes to write/read. When a data buffer is given - * (datbuf != NULL) this is the number of data bytes. When - * no data buffer is available this is the number of oob bytes. + * @len: number of data bytes to write/read * - * @retlen: number of bytes written/read. When a data buffer is given - * (datbuf != NULL) this is the number of data bytes. When - * no data buffer is available this is the number of oob bytes. + * @retlen: number of data bytes written/read * - * @ooblen: number of oob bytes per page + * @ooblen: number of oob bytes to write/read + * @oobretlen: number of oob bytes written/read * @ooboffs: offset of oob data in the oob area (only relevant when * mode = MTD_OOB_PLACE) * @datbuf: data buffer - if NULL only oob data are read/written @@ -94,6 +91,7 @@ struct mtd_oob_ops { size_t len; size_t retlen; size_t ooblen; + size_t oobretlen; uint32_t ooboffs; uint8_t *datbuf; uint8_t *oobbuf;