diff options
Diffstat (limited to 'fs/udf/ialloc.c')
| -rw-r--r-- | fs/udf/ialloc.c | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c new file mode 100644 index 000000000000..a7e5d40f1ebc --- /dev/null +++ b/fs/udf/ialloc.c @@ -0,0 +1,170 @@ +/* + * ialloc.c + * + * PURPOSE + * Inode allocation handling routines for the OSTA-UDF(tm) filesystem. + * + * CONTACTS + * E-mail regarding any portion of the Linux UDF file system should be + * directed to the development team mailing list (run by majordomo): + * linux_udf@hpesjro.fc.hp.com + * + * 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> +#include <linux/udf_fs.h> +#include <linux/sched.h> +#include <linux/slab.h> + +#include "udf_i.h" +#include "udf_sb.h" + +void udf_free_inode(struct inode * inode) +{ + 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); + + down(&sbi->s_alloc_sem); + if (sbi->s_lvidbh) { + if (S_ISDIR(inode->i_mode)) + UDF_SB_LVIDIU(sb)->numDirs = + cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) - 1); + else + UDF_SB_LVIDIU(sb)->numFiles = + cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) - 1); + + mark_buffer_dirty(sbi->s_lvidbh); + } + up(&sbi->s_alloc_sem); + + udf_free_blocks(sb, NULL, UDF_I_LOCATION(inode), 0, 1); +} + +struct inode * udf_new_inode (struct inode *dir, int mode, int * err) +{ + struct super_block *sb = dir->i_sb; + struct udf_sb_info *sbi = UDF_SB(sb); + struct inode * inode; + int block; + uint32_t start = UDF_I_LOCATION(dir).logicalBlockNum; + + inode = new_inode(sb); + + if (!inode) + { + *err = -ENOMEM; + return NULL; + } + *err = -ENOSPC; + + block = udf_new_block(dir->i_sb, NULL, UDF_I_LOCATION(dir).partitionReferenceNum, + start, err); + if (*err) + { + iput(inode); + return NULL; + } + + down(&sbi->s_alloc_sem); + UDF_I_UNIQUE(inode) = 0; + UDF_I_LENEXTENTS(inode) = 0; + UDF_I_NEXT_ALLOC_BLOCK(inode) = 0; + UDF_I_NEXT_ALLOC_GOAL(inode) = 0; + UDF_I_STRAT4096(inode) = 0; + if (UDF_SB_LVIDBH(sb)) + { + struct logicalVolHeaderDesc *lvhd; + uint64_t uniqueID; + lvhd = (struct logicalVolHeaderDesc *)(UDF_SB_LVID(sb)->logicalVolContentsUse); + if (S_ISDIR(mode)) + UDF_SB_LVIDIU(sb)->numDirs = + cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numDirs) + 1); + else + UDF_SB_LVIDIU(sb)->numFiles = + cpu_to_le32(le32_to_cpu(UDF_SB_LVIDIU(sb)->numFiles) + 1); + UDF_I_UNIQUE(inode) = uniqueID = le64_to_cpu(lvhd->uniqueID); + if (!(++uniqueID & 0x00000000FFFFFFFFUL)) + uniqueID += 16; + lvhd->uniqueID = cpu_to_le64(uniqueID); + mark_buffer_dirty(UDF_SB_LVIDBH(sb)); + } + inode->i_mode = mode; + inode->i_uid = current->fsuid; + if (dir->i_mode & S_ISGID) + { + inode->i_gid = dir->i_gid; + if (S_ISDIR(mode)) + mode |= S_ISGID; + } + else + inode->i_gid = current->fsgid; + + UDF_I_LOCATION(inode).logicalBlockNum = block; + UDF_I_LOCATION(inode).partitionReferenceNum = UDF_I_LOCATION(dir).partitionReferenceNum; + inode->i_ino = udf_get_lb_pblock(sb, UDF_I_LOCATION(inode), 0); + inode->i_blksize = PAGE_SIZE; + inode->i_blocks = 0; + UDF_I_LENEATTR(inode) = 0; + UDF_I_LENALLOC(inode) = 0; + UDF_I_USE(inode) = 0; + if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_EXTENDED_FE)) + { + UDF_I_EFE(inode) = 1; + UDF_UPDATE_UDFREV(inode->i_sb, UDF_VERS_USE_EXTENDED_FE); + UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry), GFP_KERNEL); + memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct extendedFileEntry)); + } + else + { + UDF_I_EFE(inode) = 0; + UDF_I_DATA(inode) = kmalloc(inode->i_sb->s_blocksize - sizeof(struct fileEntry), GFP_KERNEL); + memset(UDF_I_DATA(inode), 0x00, inode->i_sb->s_blocksize - sizeof(struct fileEntry)); + } + if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_AD_IN_ICB)) + UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_IN_ICB; + else if (UDF_QUERY_FLAG(inode->i_sb, UDF_FLAG_USE_SHORT_AD)) + UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_SHORT; + else + UDF_I_ALLOCTYPE(inode) = ICBTAG_FLAG_AD_LONG; + inode->i_mtime = inode->i_atime = inode->i_ctime = + UDF_I_CRTIME(inode) = current_fs_time(inode->i_sb); + insert_inode_hash(inode); + mark_inode_dirty(inode); + up(&sbi->s_alloc_sem); + + if (DQUOT_ALLOC_INODE(inode)) + { + DQUOT_DROP(inode); + inode->i_flags |= S_NOQUOTA; + inode->i_nlink = 0; + iput(inode); + *err = -EDQUOT; + return NULL; + } + + *err = 0; + return inode; +} |