litmus-rt.git - The LITMUS^RT kernel.

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Diffstat (limited to 'tools/perf/scripts/python/Perf-Trace-Util')

0 files changed, 0 insertions, 0 deletions

/* * linux/fs/affs/inode.c * * (c) 1996 Hans-Joachim Widmaier - Rewritten * * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem. * * (C) 1992 Eric Youngdale Modified for ISO9660 filesystem. * * (C) 1991 Linus Torvalds - minix filesystem */ #include <linux/sched.h> #include "affs.h" extern const struct inode_operations affs_symlink_inode_operations; extern struct timezone sys_tz; void affs_read_inode(struct inode *inode) { struct super_block *sb = inode->i_sb; struct affs_sb_info *sbi = AFFS_SB(sb); struct buffer_head *bh; struct affs_head *head; struct affs_tail *tail; u32 block; u32 size; u32 prot; u16 id; pr_debug("AFFS: read_inode(%lu)\n",inode->i_ino); block = inode->i_ino; bh = affs_bread(sb, block); if (!bh) { affs_warning(sb, "read_inode", "Cannot read block %d", block); goto bad_inode; } if (affs_checksum_block(sb, bh) || be32_to_cpu(AFFS_HEAD(bh)->ptype) != T_SHORT) { affs_warning(sb,"read_inode", "Checksum or type (ptype=%d) error on inode %d", AFFS_HEAD(bh)->ptype, block); goto bad_inode; } head = AFFS_HEAD(bh); tail = AFFS_TAIL(sb, bh); prot = be32_to_cpu(tail->protect); inode->i_size = 0; inode->i_nlink = 1; inode->i_mode = 0; AFFS_I(inode)->i_extcnt = 1; AFFS_I(inode)->i_ext_last = ~1; AFFS_I(inode)->i_protect = prot; AFFS_I(inode)->i_opencnt = 0; AFFS_I(inode)->i_blkcnt = 0; AFFS_I(inode)->i_lc = NULL; AFFS_I(inode)->i_lc_size = 0; AFFS_I(inode)->i_lc_shift = 0; AFFS_I(inode)->i_lc_mask = 0; AFFS_I(inode)->i_ac = NULL; AFFS_I(inode)->i_ext_bh = NULL; AFFS_I(inode)->mmu_private = 0; AFFS_I(inode)->i_lastalloc = 0; AFFS_I(inode)->i_pa_cnt = 0; if (sbi->s_flags & SF_SETMODE) inode->i_mode = sbi->s_mode; else inode->i_mode = prot_to_mode(prot); id = be16_to_cpu(tail->uid); if (id == 0 || sbi->s_flags & SF_SETUID) inode->i_uid = sbi->s_uid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_uid = 0; else inode->i_uid = id; id = be16_to_cpu(tail->gid); if (id == 0 || sbi->s_flags & SF_SETGID) inode->i_gid = sbi->s_gid; else if (id == 0xFFFF && sbi->s_flags & SF_MUFS) inode->i_gid = 0; else inode->i_gid = id; switch (be32_to_cpu(tail->stype)) { case ST_ROOT: inode->i_uid = sbi->s_uid; inode->i_gid = sbi->s_gid; /* fall through */ case ST_USERDIR: if (be32_to_cpu(tail->stype) == ST_USERDIR || sbi->s_flags & SF_SETMODE) { if (inode->i_mode & S_IRUSR) inode->i_mode |= S_IXUSR; if (inode->i_mode & S_IRGRP) inode->i_mode |= S_IXGRP; if (inode->i_mode & S_IROTH) inode->i_mode |= S_IXOTH; inode->i_mode |= S_IFDIR; } else inode->i_mode = S_IRUGO | S_IXUGO | S_IWUSR | S_IFDIR; if (tail->link_chain) inode->i_nlink = 2; /* Maybe it should be controlled by mount parameter? */ //inode->i_mode |= S_ISVTX; inode->i_op = &affs_dir_inode_operations; inode->i_fop = &affs_dir_operations; break; case ST_LINKDIR: #if 0 affs_warning(sb, "read_inode", "inode is LINKDIR"); goto bad_inode; #else inode->i_mode |= S_IFDIR; inode->i_op = NULL; inode->i_fop = NULL; break; #endif case ST_LINKFILE: affs_warning(sb, "read_inode", "inode is LINKFILE"); goto bad_inode; case ST_FILE: size = be32_to_cpu(tail->size); inode->i_mode |= S_IFREG; AFFS_I(inode)->mmu_private = inode->i_size = size; if (inode->i_size) { AFFS_I(inode)->i_blkcnt = (size - 1) / sbi->s_data_blksize + 1; AFFS_I(inode)->i_extcnt = (AFFS_I(inode)->i_blkcnt - 1) / sbi->s_hashsize + 1; } if (tail->link_chain) inode->i_nlink = 2; inode->i_mapping->a_ops = (sbi->s_flags & SF_OFS) ? &affs_aops_ofs : &affs_aops; inode->i_op = &affs_file_inode_operations; inode->i_fop = &affs_file_operations; break; case ST_SOFTLINK: inode->i_mode |= S_IFLNK; inode->i_op = &affs_symlink_inode_operations; inode->i_data.a_ops = &affs_symlink_aops; break; } inode->i_mtime.tv_sec = inode->i_atime.tv_sec = inode->i_ctime.tv_sec = (be32_to_cpu(tail->change.days) * (24 * 60 * 60) + be32_to_cpu(tail->change.mins) * 60 + be32_to_cpu(tail->change.ticks) / 50 + ((8 * 365 + 2) * 24 * 60 * 60)) + sys_tz.tz_minuteswest * 60; inode->i_mtime.tv_nsec = inode->i_ctime.tv_nsec = inode->i_atime.tv_nsec = 0; affs_brelse(bh); return; bad_inode: make_bad_inode(inode); affs_brelse(bh); return; } int affs_write_inode(struct inode *inode, int unused) { struct super_block *sb = inode->i_sb; struct buffer_head *bh; struct affs_tail *tail; uid_t uid; gid_t gid; pr_debug("AFFS: write_inode(%lu)\n",inode->i_ino); if (!inode->i_nlink) // possibly free block return 0; bh = affs_bread(sb, inode->i_ino); if (!bh) { affs_error(sb,"write_inode","Cannot read block %lu",inode->i_ino); return -EIO; } tail = AFFS_TAIL(sb, bh); if (tail->stype == cpu_to_be32(ST_ROOT)) { secs_to_datestamp(inode->i_mtime.tv_sec,&AFFS_ROOT_TAIL(sb, bh)->root_change); } else { tail->protect = cpu_to_be32(AFFS_I(inode)->i_protect); tail->size = cpu_to_be32(inode->i_size); secs_to_datestamp(inode->i_mtime.tv_sec,&tail->change); if (!(inode->i_ino == AFFS_SB(sb)->s_root_block)) { uid = inode->i_uid; gid = inode->i_gid; if (AFFS_SB(sb)->s_flags & SF_MUFS) { if (inode->i_uid == 0 || inode->i_uid == 0xFFFF) uid = inode->i_uid ^ ~0; if (inode->i_gid == 0 || inode->i_gid == 0xFFFF) gid = inode->i_gid ^ ~0; } if (!(AFFS_SB(sb)->s_flags & SF_SETUID)) tail->uid = cpu_to_be16(uid); if (!(AFFS_SB(sb)->s_flags & SF_SETGID)) tail->gid = cpu_to_be16(gid); } } affs_fix_checksum(sb, bh); mark_buffer_dirty_inode(bh, inode); affs_brelse(bh); affs_free_prealloc(inode); return 0; } int affs_notify_change(struct dentry *dentry, struct iattr *attr) { struct inode *inode = dentry->d_inode; int error; pr_debug("AFFS: notify_change(%lu,0x%x)\n",inode->i_ino,attr->ia_valid); error = inode_change_ok(inode,attr); if (error)


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