/* * linux/fs/isofs/namei.c * * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem. * * (C) 1991 Linus Torvalds - minix filesystem */ #include #include "isofs.h" /* * ok, we cannot use strncmp, as the name is not in our data space. * Thus we'll have to use isofs_match. No big problem. Match also makes * some sanity tests. */ static int isofs_cmp(struct dentry *dentry, const char *compare, int dlen) { struct qstr qstr; qstr.name = compare; qstr.len = dlen; if (likely(!dentry->d_op)) return dentry->d_name.len != dlen || memcmp(dentry->d_name.name, compare, dlen); return dentry->d_op->d_compare(NULL, dentry->d_name.len, dentry->d_name.name, &qstr); } /* * isofs_find_entry() * * finds an entry in the specified directory with the wanted name. It * returns the inode number of the found entry, or 0 on error. */ static unsigned long isofs_find_entry(struct inode *dir, struct dentry *dentry, unsigned long *block_rv, unsigned long *offset_rv, char *tmpname, struct iso_directory_record *tmpde) { unsigned long bufsize = ISOFS_BUFFER_SIZE(dir); unsigned char bufbits = ISOFS_BUFFER_BITS(dir); unsigned long block, f_pos, offset, block_saved, offset_saved; struct buffer_head *bh = NULL; struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb); if (!ISOFS_I(dir)->i_first_extent) return 0; f_pos = 0; offset = 0; block = 0; while (f_pos < dir->i_size) { struct iso_directory_record *de; int de_len, match, i, dlen; char *dpnt; if (!bh) { bh = isofs_bread(dir, block); if (!bh) return 0; } de = (struct iso_directory_record *) (bh->b_data + offset); de_len = *(unsigned char *) de; if (!de_len) { brelse(bh); bh = NULL; f_pos = (f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1); block = f_pos >> bufbits; offset = 0; continue; } block_saved = bh->b_blocknr; offset_saved = offset; offset += de_len; f_pos += de_len; /* Make sure we have a full directory entry */ if (offset >= bufsize) { int slop = bufsize - offset + de_len; memcpy(tmpde, de, slop); offset &= bufsize - 1; block++; brelse(bh); bh = NULL; if (offset) { bh = isofs_bread(dir, block); if (!bh) return 0; memcpy((void *) tmpde + slop, bh->b_data, offset); } de = tmpde; } dlen = de->name_len[0]; dpnt = de->name; /* Basic sanity check, whether name doesn't exceed dir entry */ if (de_len < dlen + sizeof(struct iso_directory_record)) { printk(KERN_NOTICE "iso9660: Corrupted directory entry" " in block %lu of inode %lu\n", block, dir->i_ino); return 0; } if (sbi->s_rock && ((i = get_rock_ridge_filename(de, tmpname, dir)))) { dlen = i; /* possibly -1 */ dpnt = tmpname; #ifdef CONFIG_JOLIET } else if (sbi->s_joliet_level) { dlen = get_joliet_filename(de, tmpname, dir); dpnt = tmpname; #endif } else if (sbi->s_mapping == 'a') { dlen = get_acorn_filename(de, tmpname, dir); dpnt = tmpname; } else if (sbi->s_mapping == 'n') { dlen = isofs_name_translate(de, tmpname, dir); dpnt = tmpname; } /* * Skip hidden or associated files unless hide or showassoc, * respectively, is set */ match = 0; if (dlen > 0 && (!sbi->s_hide || (!(de->flags[-sbi->s_high_sierra] & 1))) && (sbi->s_showassoc || (!(de->flags[-sbi->s_high_sierra] & 4)))) { if (dpnt && (dlen > 1 || dpnt[0] > 1)) match = (isofs_cmp(dentry, dpnt, dlen) == 0); } if (match) { isofs_normalize_block_and_offset(de, &block_saved, &offset_saved); *block_rv = block_saved; *offset_rv = offset_saved; brelse(bh); return 1; } } brelse(bh); return 0; } struct dentry *isofs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags) { int found; unsigned long uninitialized_var(block); unsigned long uninitialized_var(offset); struct inode *inode; struct page *page; page = alloc_page(GFP_USER); if (!page) return ERR_PTR(-ENOMEM); found = isofs_find_entry(dir, dentry, &block, &offset, page_address(page), 1024 + page_address(page)); __free_page(page); inode = found ? isofs_iget(dir->i_sb, block, offset) : NULL; return d_splice_alias(inode, dentry); } ivate-remove&id=235a9d89da976e2975b3de9afc0bed7b72557983'>plain -rw-r--r--at91.h751logplain -rw-r--r--ath79-clk.h479logplain -rw-r--r--axis,artpec6-clkctrl.h1112logplain -rw-r--r--bcm-cygnus.h3135logplain -rw-r--r--bcm-ns2.h2915logplain -rw-r--r--bcm-nsp.h2148logplain -rw-r--r--bcm21664.h1984logplain -rw-r--r--bcm281xx.h2456logplain -rw-r--r--bcm2835-aux.h635logplain -rw-r--r--bcm2835.h1962logplain -rw-r--r--berlin2.h1034logplain -rw-r--r--berlin2q.h695logplain -rw-r--r--clps711x-clock.h718logplain -rw-r--r--efm32-cmu.h1112logplain -rw-r--r--exynos-audss-clk.h597logplain -rw-r--r--exynos3250.h9083logplain -rw-r--r--exynos4.h8284logplain -rw-r--r--exynos4415.h9828logplain -rw-r--r--exynos5250.h4616logplain -rw-r--r--exynos5260-clk.h14876logplain -rw-r--r--exynos5410.h1689logplain -rw-r--r--exynos5420.h6857logplain -rw-r--r--exynos5433.h45372logplain -rw-r--r--exynos5440.h1141logplain -rw-r--r--exynos7-clk.h5281logplain -rw-r--r--gxbb-aoclkc.h2866logplain -rw-r--r--gxbb-clkc.h592logplain -rw-r--r--hi3516cv300-clock.h1668logplain -rw-r--r--hi3519-clock.h1328logplain -rw-r--r--hi3620-clock.h4496logplain -rw-r--r--hi6220-clock.h4508logplain -rw-r--r--hip04-clock.h1137logplain -rw-r--r--histb-clock.h2012logplain -rw-r--r--hix5hd2-clock.h2415logplain -rw-r--r--imx1-clock.h1055logplain -rw-r--r--imx21-clock.h2461logplain -rw-r--r--imx27-clock.h3494logplain -rw-r--r--imx5-clock.h7212logplain -rw-r--r--imx6qdl-clock.h9593logplain -rw-r--r--imx6sl-clock.h5849logplain -rw-r--r--imx6sx-clock.h9099logplain -rw-r--r--imx6ul-clock.h8203logplain -rw-r--r--imx7d-clock.h15974logplain -rw-r--r--jz4740-cgu.h1028logplain -rw-r--r--jz4780-cgu.h2470logplain -rw-r--r--lpc18xx-ccu.h2134logplain -rw-r--r--lpc18xx-cgu.h1142logplain -rw-r--r--lpc32xx-clock.h1633logplain -rw-r--r--lsi,axm5516-clks.h974logplain -rw-r--r--marvell,mmp2.h2022logplain -rw-r--r--marvell,pxa168.h1654logplain -rw-r--r--marvell,pxa1928.h1535logplain -rw-r--r--marvell,pxa910.h1598logplain -rw-r--r--maxim,max77620.h632logplain -rw-r--r--maxim,max77686.h648logplain -rw-r--r--maxim,max77802.h630logplain -rw-r--r--meson8b-clkc.h523logplain -rw-r--r--microchip,pic32-clock.h1150logplain -rw-r--r--mpc512x-clock.h2236logplain -rw-r--r--mt2701-clk.h13832logplain -rw-r--r--mt8135-clk.h5641logplain -rw-r--r--mt8173-clk.h9293logplain -rw-r--r--oxsemi,ox810se.h1002logplain -rw-r--r--oxsemi,ox820.h1203logplain -rw-r--r--pistachio-clk.h4863logplain -rw-r--r--pxa-clock.h1715logplain -rw-r--r--qcom,gcc-apq8084.h12872logplain -rw-r--r--qcom,gcc-ipq4019.h5423logplain -rw-r--r--qcom,gcc-ipq806x.h8574logplain -rw-r--r--qcom,gcc-mdm9615.h9497logplain -rw-r--r--qcom,gcc-msm8660.h7932logplain -rw-r--r--qcom,gcc-msm8916.h6190logplain -rw-r--r--qcom,gcc-msm8960.h9342logplain -rw-r--r--qcom,gcc-msm8974.h12340logplain -rw-r--r--qcom,gcc-msm8994.h4858logplain -rw-r--r--qcom,gcc-msm8996.h12575logplain -rw-r--r--qcom,lcc-ipq806x.h899logplain -rw-r--r--qcom,lcc-mdm9615.h1701logplain -rw-r--r--qcom,lcc-msm8960.h1616logplain -rw-r--r--qcom,mmcc-apq8084.h5722logplain -rw-r--r--qcom,mmcc-msm8960.h4109logplain -rw-r--r--qcom,mmcc-msm8974.h5223logplain -rw-r--r--qcom,mmcc-msm8996.h9403logplain -rw-r--r--qcom,rpmcc.h2101logplain -rw-r--r--r7s72100-clock.h1218logplain -rw-r--r--r8a73a4-clock.h1596logplain -rw-r--r--r8a7740-clock.h1992logplain -rw-r--r--r8a7743-cpg-mssr.h1269logplain -rw-r--r--r8a7745-cpg-mssr.h1298logplain -rw-r--r--r8a7778-clock.h1855logplain -rw-r--r--r8a7779-clock.h1647logplain -rw-r--r--r8a7790-clock.h4367logplain -rw-r--r--r8a7791-clock.h4388logplain -rw-r--r--r8a7792-clock.h2562logplain -rw-r--r--r8a7793-clock.h4561logplain -rw-r--r--r8a7794-clock.h3679logplain -rw-r--r--r8a7795-cpg-mssr.h1890logplain -rw-r--r--r8a7796-cpg-mssr.h2066logplain -rw-r--r--renesas-cpg-mssr.h542logplain -rw-r--r--rk1108-cru.h6605logplain -rw-r--r--rk3036-cru.h4584logplain -rw-r--r--rk3066a-cru.h1068logplain -rw-r--r--rk3188-cru-common.h6105logplain -rw-r--r--rk3188-cru.h1435logplain