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fs/udf/ialloc.c
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/* * ialloc.c * * PURPOSE * Inode allocation handling routines for the OSTA-UDF(tm) filesystem. * |
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* COPYRIGHT * This file is distributed under the terms of the GNU General Public * License (GPL). Copies of the GPL can be obtained from: * ftp://prep.ai.mit.edu/pub/gnu/GPL * Each contributing author retains all rights to their own work. * * (C) 1998-2001 Ben Fennema * * HISTORY * * 02/24/99 blf Created. * */ #include "udfdecl.h" #include <linux/fs.h> #include <linux/quotaops.h> |
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#include <linux/sched.h> #include <linux/slab.h> #include "udf_i.h" #include "udf_sb.h" |
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void udf_free_inode(struct inode *inode) |
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{ struct super_block *sb = inode->i_sb; struct udf_sb_info *sbi = UDF_SB(sb); /* * Note: we must free any quota before locking the superblock, * as writing the quota to disk may need the lock as well. */ DQUOT_FREE_INODE(inode); DQUOT_DROP(inode); clear_inode(inode); |
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mutex_lock(&sbi->s_alloc_mutex); |
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if (sbi->s_lvid_bh) { struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi); |
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if (S_ISDIR(inode->i_mode)) |
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le32_add_cpu(&lvidiu->numDirs, -1); |
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else |
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le32_add_cpu(&lvidiu->numFiles, -1); |
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|
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mark_buffer_dirty(sbi->s_lvid_bh); |
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} |
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mutex_unlock(&sbi->s_alloc_mutex); |
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udf_free_blocks(sb, NULL, UDF_I(inode)->i_location, 0, 1); |
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} |
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struct inode *udf_new_inode(struct inode *dir, int mode, int *err) |
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{ struct super_block *sb = dir->i_sb; struct udf_sb_info *sbi = UDF_SB(sb); |
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struct inode *inode; |
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int block; |
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uint32_t start = UDF_I(dir)->i_location.logicalBlockNum; |
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struct udf_inode_info *iinfo; struct udf_inode_info *dinfo = UDF_I(dir); |
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inode = new_inode(sb); |
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if (!inode) { |
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*err = -ENOMEM; return NULL; } *err = -ENOSPC; |
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iinfo = UDF_I(inode); |
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) { iinfo->i_efe = 1; if (UDF_VERS_USE_EXTENDED_FE > sbi->s_udfrev) sbi->s_udfrev = UDF_VERS_USE_EXTENDED_FE; iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); } else { iinfo->i_efe = 0; iinfo->i_ext.i_data = kzalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); } if (!iinfo->i_ext.i_data) { iput(inode); *err = -ENOMEM; return NULL; } |
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block = udf_new_block(dir->i_sb, NULL, |
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dinfo->i_location.partitionReferenceNum, |
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start, err); |
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if (*err) { |
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iput(inode); return NULL; } |
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mutex_lock(&sbi->s_alloc_mutex); |
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if (sbi->s_lvid_bh) { |
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struct logicalVolIntegrityDesc *lvid = (struct logicalVolIntegrityDesc *) sbi->s_lvid_bh->b_data; struct logicalVolIntegrityDescImpUse *lvidiu = udf_sb_lvidiu(sbi); |
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struct logicalVolHeaderDesc *lvhd; uint64_t uniqueID; |
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lvhd = (struct logicalVolHeaderDesc *) (lvid->logicalVolContentsUse); |
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if (S_ISDIR(mode)) |
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le32_add_cpu(&lvidiu->numDirs, 1); |
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else |
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le32_add_cpu(&lvidiu->numFiles, 1); |
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iinfo->i_unique = uniqueID = le64_to_cpu(lvhd->uniqueID); |
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if (!(++uniqueID & 0x00000000FFFFFFFFUL)) uniqueID += 16; lvhd->uniqueID = cpu_to_le64(uniqueID); |
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mark_buffer_dirty(sbi->s_lvid_bh); |
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} |
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mutex_unlock(&sbi->s_alloc_mutex); |
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inode->i_mode = mode; |
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inode->i_uid = current_fsuid(); |
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if (dir->i_mode & S_ISGID) { |
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inode->i_gid = dir->i_gid; if (S_ISDIR(mode)) mode |= S_ISGID; |
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} else { |
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inode->i_gid = current_fsgid(); |
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} |
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iinfo->i_location.logicalBlockNum = block; iinfo->i_location.partitionReferenceNum = dinfo->i_location.partitionReferenceNum; inode->i_ino = udf_get_lb_pblock(sb, iinfo->i_location, 0); |
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inode->i_blocks = 0; |
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iinfo->i_lenEAttr = 0; iinfo->i_lenAlloc = 0; iinfo->i_use = 0; |
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if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) |
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_IN_ICB; |
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else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) |
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_SHORT; |
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else |
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iinfo->i_alloc_type = ICBTAG_FLAG_AD_LONG; |
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inode->i_mtime = inode->i_atime = inode->i_ctime = |
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iinfo->i_crtime = current_fs_time(inode->i_sb); |
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insert_inode_hash(inode); mark_inode_dirty(inode); |
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if (DQUOT_ALLOC_INODE(inode)) { |
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DQUOT_DROP(inode); inode->i_flags |= S_NOQUOTA; inode->i_nlink = 0; iput(inode); *err = -EDQUOT; return NULL; } *err = 0; return inode; } |