/* * linux/fs/sysv/ialloc.c * * minix/bitmap.c * Copyright (C) 1991, 1992 Linus Torvalds * * ext/freelists.c * Copyright (C) 1992 Remy Card (card@masi.ibp.fr) * * xenix/alloc.c * Copyright (C) 1992 Doug Evans * * coh/alloc.c * Copyright (C) 1993 Pascal Haible, Bruno Haible * * sysv/ialloc.c * Copyright (C) 1993 Bruno Haible * * This file contains code for allocating/freeing inodes. */ #include #include #include #include #include #include #include #include "sysv.h" /* We don't trust the value of sb->sv_sbd2->s_tinode = *sb->sv_sb_total_free_inodes but we nevertheless keep it up to date. */ /* An inode on disk is considered free if both i_mode == 0 and i_nlink == 0. */ /* return &sb->sv_sb_fic_inodes[i] = &sbd->s_inode[i]; */ static inline sysv_ino_t * sv_sb_fic_inode(struct super_block * sb, unsigned int i) { struct sysv_sb_info *sbi = SYSV_SB(sb); if (sbi->s_bh1 == sbi->s_bh2) return &sbi->s_sb_fic_inodes[i]; else { /* 512 byte Xenix FS */ unsigned int offset = offsetof(struct xenix_super_block, s_inode[i]); if (offset < 512) return (sysv_ino_t*)(sbi->s_sbd1 + offset); else return (sysv_ino_t*)(sbi->s_sbd2 + offset); } } struct sysv_inode * sysv_raw_inode(struct super_block *sb, unsigned ino, struct buffer_head **bh) { struct sysv_sb_info *sbi = SYSV_SB(sb); struct sysv_inode *res; int block = sbi->s_firstinodezone + sbi->s_block_base; block += (ino-1) >> sbi->s_inodes_per_block_bits; *bh = sb_bread(sb, block); if (!*bh) return NULL; res = (struct sysv_inode *)(*bh)->b_data; return res + ((ino-1) & sbi->s_inodes_per_block_1); } static int refill_free_cache(struct super_block *sb) { struct sysv_sb_info *sbi = SYSV_SB(sb); struct buffer_head * bh; struct sysv_inode * raw_inode; int i = 0, ino; ino = SYSV_ROOT_INO+1; raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) goto out; while (ino <= sbi->s_ninodes) { if (raw_inode->i_mode == 0 && raw_inode->i_nlink == 0) { *sv_sb_fic_inode(sb,i++) = cpu_to_fs16(SYSV_SB(sb), ino); if (i == sbi->s_fic_size) break; } if ((ino++ & sbi->s_inodes_per_block_1) == 0) { brelse(bh); raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) goto out; } else raw_inode++; } brelse(bh); out: return i; } void sysv_free_inode(struct inode * inode) { struct super_block *sb = inode->i_sb; struct sysv_sb_info *sbi = SYSV_SB(sb); unsigned int ino; struct buffer_head * bh; struct sysv_inode * raw_inode; unsigned count; sb = inode->i_sb; ino = inode->i_ino; if (ino <= SYSV_ROOT_INO || ino > sbi->s_ninodes) { printk("sysv_free_inode: inode 0,1,2 or nonexistent inode\n"); return; } raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) { printk("sysv_free_inode: unable to read inode block on device " "%s\n", inode->i_sb->s_id); return; } mutex_lock(&sbi->s_lock); count = fs16_to_cpu(sbi, *sbi->s_sb_fic_count); if (count < sbi->s_fic_size) { *sv_sb_fic_inode(sb,count++) = cpu_to_fs16(sbi, ino); *sbi->s_sb_fic_count = cpu_to_fs16(sbi, count); } fs16_add(sbi, sbi->s_sb_total_free_inodes, 1); dirty_sb(sb); memset(raw_inode, 0, sizeof(struct sysv_inode)); mark_buffer_dirty(bh); mutex_unlock(&sbi->s_lock); brelse(bh); } struct inode * sysv_new_inode(const struct inode * dir, umode_t mode) { struct super_block *sb = dir->i_sb; struct sysv_sb_info *sbi = SYSV_SB(sb); struct inode *inode; sysv_ino_t ino; unsigned count; struct writeback_control wbc = { .sync_mode = WB_SYNC_NONE }; inode = new_inode(sb); if (!inode) return ERR_PTR(-ENOMEM); mutex_lock(&sbi->s_lock); count = fs16_to_cpu(sbi, *sbi->s_sb_fic_count); if (count == 0 || (*sv_sb_fic_inode(sb,count-1) == 0)) { count = refill_free_cache(sb); if (count == 0) { iput(inode); mutex_unlock(&sbi->s_lock); return ERR_PTR(-ENOSPC); } } /* Now count > 0. */ ino = *sv_sb_fic_inode(sb,--count); *sbi->s_sb_fic_count = cpu_to_fs16(sbi, count); fs16_add(sbi, sbi->s_sb_total_free_inodes, -1); dirty_sb(sb); inode_init_owner(inode, dir, mode); inode->i_ino = fs16_to_cpu(sbi, ino); inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); inode->i_blocks = 0; memset(SYSV_I(inode)->i_data, 0, sizeof(SYSV_I(inode)->i_data)); SYSV_I(inode)->i_dir_start_lookup = 0; insert_inode_hash(inode); mark_inode_dirty(inode); sysv_write_inode(inode, &wbc); /* ensure inode not allocated again */ mark_inode_dirty(inode); /* cleared by sysv_write_inode() */ /* That's it. */ mutex_unlock(&sbi->s_lock); return inode; } unsigned long sysv_count_free_inodes(struct super_block * sb) { struct sysv_sb_info *sbi = SYSV_SB(sb); struct buffer_head * bh; struct sysv_inode * raw_inode; int ino, count, sb_count; mutex_lock(&sbi->s_lock); sb_count = fs16_to_cpu(sbi, *sbi->s_sb_total_free_inodes); if (0) goto trust_sb; /* this causes a lot of disk traffic ... */ count = 0; ino = SYSV_ROOT_INO+1; raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) goto Eio; while (ino <= sbi->s_ninodes) { if (raw_inode->i_mode == 0 && raw_inode->i_nlink == 0) count++; if ((ino++ & sbi->s_inodes_per_block_1) == 0) { brelse(bh); raw_inode = sysv_raw_inode(sb, ino, &bh); if (!raw_inode) goto Eio; } else raw_inode++; } brelse(bh); if (count != sb_count) goto Einval; out: mutex_unlock(&sbi->s_lock); return count; Einval: printk("sysv_count_free_inodes: " "free inode count was %d, correcting to %d\n", sb_count, count); if (!(sb->s_flags & MS_RDONLY)) { *sbi->s_sb_total_free_inodes = cpu_to_fs16(SYSV_SB(sb), count); dirty_sb(sb); } goto out; Eio: printk("sysv_count_free_inodes: unable to read inode table\n"); trust_sb: count = sb_count; goto out; } 4cb1a1f9dbd'>d514a2d8512fc52c15747841e2368f8f99a50787 /tools/perf/util/cloexec.h parent3365135d43f861003555c963b309672d053a2228 (diff)parent950eabbd6ddedc1b08350b9169a6a51b130ebaaf (diff)
Merge git://git.kernel.org/pub/scm/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 'tools/perf/util/cloexec.h')