/* * linux/fs/minix/bitmap.c * * Copyright (C) 1991, 1992 Linus Torvalds */ /* * Modified for 680x0 by Hamish Macdonald * Fixed for 680x0 by Andreas Schwab */ /* bitmap.c contains the code that handles the inode and block bitmaps */ #include "minix.h" #include #include #include static DEFINE_SPINLOCK(bitmap_lock); /* * bitmap consists of blocks filled with 16bit words * bit set == busy, bit clear == free * endianness is a mess, but for counting zero bits it really doesn't matter... */ static __u32 count_free(struct buffer_head *map[], unsigned blocksize, __u32 numbits) { __u32 sum = 0; unsigned blocks = DIV_ROUND_UP(numbits, blocksize * 8); while (blocks--) { unsigned words = blocksize / 2; __u16 *p = (__u16 *)(*map++)->b_data; while (words--) sum += 16 - hweight16(*p++); } return sum; } void minix_free_block(struct inode *inode, unsigned long block) { struct super_block *sb = inode->i_sb; struct minix_sb_info *sbi = minix_sb(sb); struct buffer_head *bh; int k = sb->s_blocksize_bits + 3; unsigned long bit, zone; if (block < sbi->s_firstdatazone || block >= sbi->s_nzones) { printk("Trying to free block not in datazone\n"); return; } zone = block - sbi->s_firstdatazone + 1; bit = zone & ((1<>= k; if (zone >= sbi->s_zmap_blocks) { printk("minix_free_block: nonexistent bitmap buffer\n"); return; } bh = sbi->s_zmap[zone]; spin_lock(&bitmap_lock); if (!minix_test_and_clear_bit(bit, bh->b_data)) printk("minix_free_block (%s:%lu): bit already cleared\n", sb->s_id, block); spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); return; } int minix_new_block(struct inode * inode) { struct minix_sb_info *sbi = minix_sb(inode->i_sb); int bits_per_zone = 8 * inode->i_sb->s_blocksize; int i; for (i = 0; i < sbi->s_zmap_blocks; i++) { struct buffer_head *bh = sbi->s_zmap[i]; int j; spin_lock(&bitmap_lock); j = minix_find_first_zero_bit(bh->b_data, bits_per_zone); if (j < bits_per_zone) { minix_set_bit(j, bh->b_data); spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); j += i * bits_per_zone + sbi->s_firstdatazone-1; if (j < sbi->s_firstdatazone || j >= sbi->s_nzones) break; return j; } spin_unlock(&bitmap_lock); } return 0; } unsigned long minix_count_free_blocks(struct super_block *sb) { struct minix_sb_info *sbi = minix_sb(sb); u32 bits = sbi->s_nzones - sbi->s_firstdatazone + 1; return (count_free(sbi->s_zmap, sb->s_blocksize, bits) << sbi->s_log_zone_size); } struct minix_inode * minix_V1_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh) { int block; struct minix_sb_info *sbi = minix_sb(sb); struct minix_inode *p; if (!ino || ino > sbi->s_ninodes) { printk("Bad inode number on dev %s: %ld is out of range\n", sb->s_id, (long)ino); return NULL; } ino--; block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks + ino / MINIX_INODES_PER_BLOCK; *bh = sb_bread(sb, block); if (!*bh) { printk("Unable to read inode block\n"); return NULL; } p = (void *)(*bh)->b_data; return p + ino % MINIX_INODES_PER_BLOCK; } struct minix2_inode * minix_V2_raw_inode(struct super_block *sb, ino_t ino, struct buffer_head **bh) { int block; struct minix_sb_info *sbi = minix_sb(sb); struct minix2_inode *p; int minix2_inodes_per_block = sb->s_blocksize / sizeof(struct minix2_inode); *bh = NULL; if (!ino || ino > sbi->s_ninodes) { printk("Bad inode number on dev %s: %ld is out of range\n", sb->s_id, (long)ino); return NULL; } ino--; block = 2 + sbi->s_imap_blocks + sbi->s_zmap_blocks + ino / minix2_inodes_per_block; *bh = sb_bread(sb, block); if (!*bh) { printk("Unable to read inode block\n"); return NULL; } p = (void *)(*bh)->b_data; return p + ino % minix2_inodes_per_block; } /* Clear the link count and mode of a deleted inode on disk. */ static void minix_clear_inode(struct inode *inode) { struct buffer_head *bh = NULL; if (INODE_VERSION(inode) == MINIX_V1) { struct minix_inode *raw_inode; raw_inode = minix_V1_raw_inode(inode->i_sb, inode->i_ino, &bh); if (raw_inode) { raw_inode->i_nlinks = 0; raw_inode->i_mode = 0; } } else { struct minix2_inode *raw_inode; raw_inode = minix_V2_raw_inode(inode->i_sb, inode->i_ino, &bh); if (raw_inode) { raw_inode->i_nlinks = 0; raw_inode->i_mode = 0; } } if (bh) { mark_buffer_dirty(bh); brelse (bh); } } void minix_free_inode(struct inode * inode) { struct super_block *sb = inode->i_sb; struct minix_sb_info *sbi = minix_sb(inode->i_sb); struct buffer_head *bh; int k = sb->s_blocksize_bits + 3; unsigned long ino, bit; ino = inode->i_ino; if (ino < 1 || ino > sbi->s_ninodes) { printk("minix_free_inode: inode 0 or nonexistent inode\n"); return; } bit = ino & ((1<>= k; if (ino >= sbi->s_imap_blocks) { printk("minix_free_inode: nonexistent imap in superblock\n"); return; } minix_clear_inode(inode); /* clear on-disk copy */ bh = sbi->s_imap[ino]; spin_lock(&bitmap_lock); if (!minix_test_and_clear_bit(bit, bh->b_data)) printk("minix_free_inode: bit %lu already cleared\n", bit); spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); } struct inode *minix_new_inode(const struct inode *dir, umode_t mode, int *error) { struct super_block *sb = dir->i_sb; struct minix_sb_info *sbi = minix_sb(sb); struct inode *inode = new_inode(sb); struct buffer_head * bh; int bits_per_zone = 8 * sb->s_blocksize; unsigned long j; int i; if (!inode) { *error = -ENOMEM; return NULL; } j = bits_per_zone; bh = NULL; *error = -ENOSPC; spin_lock(&bitmap_lock); for (i = 0; i < sbi->s_imap_blocks; i++) { bh = sbi->s_imap[i]; j = minix_find_first_zero_bit(bh->b_data, bits_per_zone); if (j < bits_per_zone) break; } if (!bh || j >= bits_per_zone) { spin_unlock(&bitmap_lock); iput(inode); return NULL; } if (minix_test_and_set_bit(j, bh->b_data)) { /* shouldn't happen */ spin_unlock(&bitmap_lock); printk("minix_new_inode: bit already set\n"); iput(inode); return NULL; } spin_unlock(&bitmap_lock); mark_buffer_dirty(bh); j += i * bits_per_zone; if (!j || j > sbi->s_ninodes) { iput(inode); return NULL; } inode_init_owner(inode, dir, mode); inode->i_ino = j; inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); inode->i_blocks = 0; memset(&minix_i(inode)->u, 0, sizeof(minix_i(inode)->u)); insert_inode_hash(inode); mark_inode_dirty(inode); *error = 0; return inode; } unsigned long minix_count_free_inodes(struct super_block *sb) { struct minix_sb_info *sbi = minix_sb(sb); u32 bits = sbi->s_ninodes + 1; return count_free(sbi->s_imap, sb->s_blocksize, bits); } linux/kernel/git/davem/net
Pull networking fixes from David Miller: 1) GTP fixes from Andreas Schultz (missing genl module alias, clear IP DF on transmit). 2) Netfilter needs to reflect the fwmark when sending resets, from Pau Espin Pedrol. 3) nftable dump OOPS fix from Liping Zhang. 4) Fix erroneous setting of VIRTIO_NET_HDR_F_DATA_VALID on transmit, from Rolf Neugebauer. 5) Fix build error of ipt_CLUSTERIP when procfs is disabled, from Arnd Bergmann. 6) Fix regression in handling of NETIF_F_SG in harmonize_features(), from Eric Dumazet. 7) Fix RTNL deadlock wrt. lwtunnel module loading, from David Ahern. 8) tcp_fastopen_create_child() needs to setup tp->max_window, from Alexey Kodanev. 9) Missing kmemdup() failure check in ipv6 segment routing code, from Eric Dumazet. 10) Don't execute unix_bind() under the bindlock, otherwise we deadlock with splice. From WANG Cong. 11) ip6_tnl_parse_tlv_enc_lim() potentially reallocates the skb buffer, therefore callers must reload cached header pointers into that skb. Fix from Eric Dumazet. 12) Fix various bugs in legacy IRQ fallback handling in alx driver, from Tobias Regnery. 13) Do not allow lwtunnel drivers to be unloaded while they are referenced by active instances, from Robert Shearman. 14) Fix truncated PHY LED trigger names, from Geert Uytterhoeven. 15) Fix a few regressions from virtio_net XDP support, from John Fastabend and Jakub Kicinski. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (102 commits) ISDN: eicon: silence misleading array-bounds warning net: phy: micrel: add support for KSZ8795 gtp: fix cross netns recv on gtp socket gtp: clear DF bit on GTP packet tx gtp: add genl family modules alias tcp: don't annotate mark on control socket from tcp_v6_send_response() ravb: unmap descriptors when freeing rings virtio_net: reject XDP programs using header adjustment virtio_net: use dev_kfree_skb for small buffer XDP receive r8152: check rx after napi is enabled r8152: re-schedule napi for tx r8152: avoid start_xmit to schedule napi when napi is disabled r8152: avoid start_xmit to call napi_schedule during autosuspend net: dsa: Bring back device detaching in dsa_slave_suspend() net: phy: leds: Fix truncated LED trigger names net: phy: leds: Break dependency of phy.h on phy_led_triggers.h net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash net-next: ethernet: mediatek: change the compatible string Documentation: devicetree: change the mediatek ethernet compatible string bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status(). ...
Diffstat (limited to 'kernel/futex_compat.c')