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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /fs/udf/ialloc.c
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'fs/udf/ialloc.c')
-rw-r--r--fs/udf/ialloc.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
new file mode 100644
index 00000000000..a7e5d40f1eb
--- /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;
+}