From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- fs/affs/dir.c | 180 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 180 insertions(+) create mode 100644 fs/affs/dir.c (limited to 'fs/affs/dir.c') diff --git a/fs/affs/dir.c b/fs/affs/dir.c new file mode 100644 index 000000000..d2b897ebb --- /dev/null +++ b/fs/affs/dir.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * linux/fs/affs/dir.c + * + * (c) 1996 Hans-Joachim Widmaier - Rewritten + * + * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. + * + * (C) 1992 Eric Youngdale Modified for ISO 9660 filesystem. + * + * (C) 1991 Linus Torvalds - minix filesystem + * + * affs directory handling functions + * + */ + +#include +#include +#include "affs.h" + +struct affs_dir_data { + unsigned long ino; + u64 cookie; +}; + +static int affs_readdir(struct file *, struct dir_context *); + +static loff_t affs_dir_llseek(struct file *file, loff_t offset, int whence) +{ + struct affs_dir_data *data = file->private_data; + + return generic_llseek_cookie(file, offset, whence, &data->cookie); +} + +static int affs_dir_open(struct inode *inode, struct file *file) +{ + struct affs_dir_data *data; + + data = kzalloc_obj(struct affs_dir_data); + if (!data) + return -ENOMEM; + file->private_data = data; + return 0; +} + +static int affs_dir_release(struct inode *inode, struct file *file) +{ + kfree(file->private_data); + return 0; +} + +const struct file_operations affs_dir_operations = { + .open = affs_dir_open, + .read = generic_read_dir, + .llseek = affs_dir_llseek, + .iterate_shared = affs_readdir, + .fsync = affs_file_fsync, + .release = affs_dir_release, + .setlease = generic_setlease, +}; + +/* + * directories can handle most operations... + */ +const struct inode_operations affs_dir_inode_operations = { + .create = affs_create, + .lookup = affs_lookup, + .link = affs_link, + .unlink = affs_unlink, + .symlink = affs_symlink, + .mkdir = affs_mkdir, + .rmdir = affs_rmdir, + .rename = affs_rename2, + .setattr = affs_setattr, +}; + +static int +affs_readdir(struct file *file, struct dir_context *ctx) +{ + struct inode *inode = file_inode(file); + struct affs_dir_data *data = file->private_data; + struct super_block *sb = inode->i_sb; + struct buffer_head *dir_bh = NULL; + struct buffer_head *fh_bh = NULL; + unsigned char *name; + int namelen; + u32 i; + int hash_pos; + int chain_pos; + u32 ino; + int error = 0; + + pr_debug("%s(ino=%llu,f_pos=%llx)\n", __func__, inode->i_ino, ctx->pos); + + if (ctx->pos < 2) { + data->ino = 0; + if (!dir_emit_dots(file, ctx)) + return 0; + } + + affs_lock_dir(inode); + chain_pos = (ctx->pos - 2) & 0xffff; + hash_pos = (ctx->pos - 2) >> 16; + if (chain_pos == 0xffff) { + affs_warning(sb, "readdir", "More than 65535 entries in chain"); + chain_pos = 0; + hash_pos++; + ctx->pos = ((hash_pos << 16) | chain_pos) + 2; + } + dir_bh = affs_bread(sb, inode->i_ino); + if (!dir_bh) + goto out_unlock_dir; + + /* If the directory hasn't changed since the last call to readdir(), + * we can jump directly to where we left off. + */ + ino = data->ino; + if (ino && inode_eq_iversion(inode, data->cookie)) { + pr_debug("readdir() left off=%d\n", ino); + goto inside; + } + if (hash_pos >= AFFS_SB(sb)->s_hashsize) + goto done; + + ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); + for (i = 0; ino && i < chain_pos; i++) { + fh_bh = affs_bread(sb, ino); + if (!fh_bh) { + affs_error(sb, "readdir","Cannot read block %d", i); + error = -EIO; + goto out_brelse_dir; + } + ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); + affs_brelse(fh_bh); + fh_bh = NULL; + } + if (ino) + goto inside; + hash_pos++; + + for (; hash_pos < AFFS_SB(sb)->s_hashsize; hash_pos++) { + ino = be32_to_cpu(AFFS_HEAD(dir_bh)->table[hash_pos]); + if (!ino) + continue; + ctx->pos = (hash_pos << 16) + 2; +inside: + do { + fh_bh = affs_bread(sb, ino); + if (!fh_bh) { + affs_error(sb, "readdir", + "Cannot read block %d", ino); + break; + } + + namelen = min(AFFS_TAIL(sb, fh_bh)->name[0], + (u8)AFFSNAMEMAX); + name = AFFS_TAIL(sb, fh_bh)->name + 1; + pr_debug("readdir(): dir_emit(\"%.*s\", ino=%u), hash=%d, f_pos=%llx\n", + namelen, name, ino, hash_pos, ctx->pos); + + if (!dir_emit(ctx, name, namelen, ino, DT_UNKNOWN)) + goto done; + ctx->pos++; + ino = be32_to_cpu(AFFS_TAIL(sb, fh_bh)->hash_chain); + affs_brelse(fh_bh); + fh_bh = NULL; + } while (ino); + } +done: + data->cookie = inode_query_iversion(inode); + data->ino = ino; + affs_brelse(fh_bh); + +out_brelse_dir: + affs_brelse(dir_bh); + +out_unlock_dir: + affs_unlock_dir(inode); + return error; +} -- cgit v1.3.1