mirror of https://gitee.com/openkylin/linux.git
freevxfs: implement ->alloc_inode and ->destroy_inode
This driver predates those methods and was trying to be clever allocating it's own private data. Switch to the generic scheme used by other file systems. Based on an earlier patch from Krzysztof Błaszkowski <kb@sysmikro.com.pl>. Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Christoph Hellwig
parent
f2bf2c7048
commit
2f137e31e0
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@ -272,13 +272,6 @@ enum {
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#define VXFS_ISIMMED(ip) VXFS_IS_ORG((ip), VXFS_ORG_IMMED)
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#define VXFS_ISTYPED(ip) VXFS_IS_ORG((ip), VXFS_ORG_TYPED)
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/*
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* Get filesystem private data from VFS inode.
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*/
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#define VXFS_INO(ip) \
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((struct vxfs_inode_info *)(ip)->i_private)
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/*
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* Get filesystem private data from VFS superblock.
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*/
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@ -52,7 +52,6 @@ extern int vxfs_read_fshead(struct super_block *);
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/* vxfs_inode.c */
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extern const struct address_space_operations vxfs_immed_aops;
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extern struct kmem_cache *vxfs_inode_cachep;
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extern void vxfs_dumpi(struct vxfs_inode_info *, ino_t);
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extern struct inode *vxfs_blkiget(struct super_block *, u_long, ino_t);
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extern struct inode *vxfs_stiget(struct super_block *, ino_t);
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@ -42,11 +42,6 @@
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#include "vxfs_extern.h"
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struct kmem_cache *vxfs_inode_cachep;
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static struct inode * vxfs_get_fake_inode(struct super_block *,
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struct vxfs_inode_info *);
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#ifdef DIAGNOSTIC
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/*
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* Dump inode contents (partially).
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@ -70,156 +65,6 @@ vxfs_dumpi(struct vxfs_inode_info *vip, ino_t ino)
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}
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#endif
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static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
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struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
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{
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vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
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vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
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vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
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vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
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vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
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vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
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vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
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vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
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vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
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vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
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vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
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vip->vii_orgtype = dip->vdi_orgtype;
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vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
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vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
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if (VXFS_ISDIR(vip))
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vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
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else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
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vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);
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/* don't endian swap the fields that differ by orgtype */
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memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
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}
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/**
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* vxfs_blkiget - find inode based on extent #
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* @sbp: superblock of the filesystem we search in
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* @extent: number of the extent to search
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* @ino: inode number to search
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*
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* Description:
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* vxfs_blkiget searches inode @ino in the filesystem described by
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* @sbp in the extent @extent.
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* Returns the matching VxFS inode on success, else a NULL pointer.
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*
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* NOTE:
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* While __vxfs_iget uses the pagecache vxfs_blkiget uses the
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* buffercache. This function should not be used outside the
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* read_super() method, otherwise the data may be incoherent.
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*/
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struct inode *
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vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
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{
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struct buffer_head *bp;
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struct inode *inode;
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u_long block, offset;
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block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
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offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
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bp = sb_bread(sbp, block);
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if (bp && buffer_mapped(bp)) {
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struct vxfs_inode_info *vip;
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struct vxfs_dinode *dip;
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if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
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goto fail;
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dip = (struct vxfs_dinode *)(bp->b_data + offset);
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dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
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#ifdef DIAGNOSTIC
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vxfs_dumpi(vip, ino);
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#endif
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brelse(bp);
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inode = vxfs_get_fake_inode(sbp, vip);
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if (!inode)
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kmem_cache_free(vxfs_inode_cachep, vip);
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return inode;
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}
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fail:
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printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
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brelse(bp);
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return NULL;
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}
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/**
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* __vxfs_iget - generic find inode facility
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* @sbp: VFS superblock
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* @ino: inode number
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* @ilistp: inode list
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*
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* Description:
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* Search the for inode number @ino in the filesystem
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* described by @sbp. Use the specified inode table (@ilistp).
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* Returns the matching inode on success, else an error code.
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*/
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static struct vxfs_inode_info *
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__vxfs_iget(ino_t ino, struct inode *ilistp)
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{
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struct page *pp;
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u_long offset;
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offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
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pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
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if (!IS_ERR(pp)) {
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struct vxfs_inode_info *vip;
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struct vxfs_dinode *dip;
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caddr_t kaddr = (char *)page_address(pp);
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if (!(vip = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL)))
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goto fail;
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dip = (struct vxfs_dinode *)(kaddr + offset);
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dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
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#ifdef DIAGNOSTIC
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vxfs_dumpi(vip, ino);
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#endif
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vxfs_put_page(pp);
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return (vip);
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}
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printk(KERN_WARNING "vxfs: error on page %p\n", pp);
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return ERR_CAST(pp);
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fail:
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printk(KERN_WARNING "vxfs: unable to read inode %ld\n", (unsigned long)ino);
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vxfs_put_page(pp);
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return ERR_PTR(-ENOMEM);
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}
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/**
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* vxfs_stiget - find inode using the structural inode list
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* @sbp: VFS superblock
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* @ino: inode #
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*
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* Description:
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* Find inode @ino in the filesystem described by @sbp using
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* the structural inode list.
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* Returns the matching inode on success, else a NULL pointer.
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*/
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struct inode *
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vxfs_stiget(struct super_block *sbp, ino_t ino)
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{
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struct vxfs_inode_info *vip;
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struct inode *inode;
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vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_stilist);
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if (IS_ERR(vip))
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return NULL;
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inode = vxfs_get_fake_inode(sbp, vip);
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if (!inode)
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kmem_cache_free(vxfs_inode_cachep, vip);
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return inode;
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}
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/**
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* vxfs_transmod - mode for a VxFS inode
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* @vip: VxFS inode
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@ -251,61 +96,172 @@ vxfs_transmod(struct vxfs_inode_info *vip)
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return (ret);
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}
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/**
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* vxfs_iinit- helper to fill inode fields
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* @ip: VFS inode
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* @vip: VxFS inode
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*
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* Description:
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* vxfs_instino is a helper function to fill in all relevant
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* fields in @ip from @vip.
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*/
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static void
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vxfs_iinit(struct inode *ip, struct vxfs_inode_info *vip)
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static inline void dip2vip_cpy(struct vxfs_sb_info *sbi,
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struct vxfs_inode_info *vip, struct vxfs_dinode *dip)
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{
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struct inode *inode = &vip->vfs_inode;
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ip->i_mode = vxfs_transmod(vip);
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i_uid_write(ip, (uid_t)vip->vii_uid);
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i_gid_write(ip, (gid_t)vip->vii_gid);
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vip->vii_mode = fs32_to_cpu(sbi, dip->vdi_mode);
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vip->vii_nlink = fs32_to_cpu(sbi, dip->vdi_nlink);
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vip->vii_uid = fs32_to_cpu(sbi, dip->vdi_uid);
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vip->vii_gid = fs32_to_cpu(sbi, dip->vdi_gid);
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vip->vii_size = fs64_to_cpu(sbi, dip->vdi_size);
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vip->vii_atime = fs32_to_cpu(sbi, dip->vdi_atime);
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vip->vii_autime = fs32_to_cpu(sbi, dip->vdi_autime);
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vip->vii_mtime = fs32_to_cpu(sbi, dip->vdi_mtime);
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vip->vii_mutime = fs32_to_cpu(sbi, dip->vdi_mutime);
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vip->vii_ctime = fs32_to_cpu(sbi, dip->vdi_ctime);
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vip->vii_cutime = fs32_to_cpu(sbi, dip->vdi_cutime);
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vip->vii_orgtype = dip->vdi_orgtype;
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set_nlink(ip, vip->vii_nlink);
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ip->i_size = vip->vii_size;
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vip->vii_blocks = fs32_to_cpu(sbi, dip->vdi_blocks);
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vip->vii_gen = fs32_to_cpu(sbi, dip->vdi_gen);
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ip->i_atime.tv_sec = vip->vii_atime;
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ip->i_ctime.tv_sec = vip->vii_ctime;
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ip->i_mtime.tv_sec = vip->vii_mtime;
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ip->i_atime.tv_nsec = 0;
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ip->i_ctime.tv_nsec = 0;
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ip->i_mtime.tv_nsec = 0;
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if (VXFS_ISDIR(vip))
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vip->vii_dotdot = fs32_to_cpu(sbi, dip->vdi_dotdot);
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else if (!VXFS_ISREG(vip) && !VXFS_ISLNK(vip))
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vip->vii_rdev = fs32_to_cpu(sbi, dip->vdi_rdev);
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ip->i_blocks = vip->vii_blocks;
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ip->i_generation = vip->vii_gen;
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/* don't endian swap the fields that differ by orgtype */
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memcpy(&vip->vii_org, &dip->vdi_org, sizeof(vip->vii_org));
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ip->i_private = vip;
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inode->i_mode = vxfs_transmod(vip);
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i_uid_write(inode, (uid_t)vip->vii_uid);
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i_gid_write(inode, (gid_t)vip->vii_gid);
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set_nlink(inode, vip->vii_nlink);
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inode->i_size = vip->vii_size;
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inode->i_atime.tv_sec = vip->vii_atime;
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inode->i_ctime.tv_sec = vip->vii_ctime;
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inode->i_mtime.tv_sec = vip->vii_mtime;
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inode->i_atime.tv_nsec = 0;
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inode->i_ctime.tv_nsec = 0;
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inode->i_mtime.tv_nsec = 0;
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inode->i_blocks = vip->vii_blocks;
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inode->i_generation = vip->vii_gen;
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}
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/**
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* vxfs_get_fake_inode - get fake inode structure
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* @sbp: filesystem superblock
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* @vip: fspriv inode
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* vxfs_blkiget - find inode based on extent #
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* @sbp: superblock of the filesystem we search in
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* @extent: number of the extent to search
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* @ino: inode number to search
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*
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* Description:
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* vxfs_fake_inode gets a fake inode (not in the inode hash) for a
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* superblock, vxfs_inode pair.
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* Returns the filled VFS inode.
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* vxfs_blkiget searches inode @ino in the filesystem described by
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* @sbp in the extent @extent.
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* Returns the matching VxFS inode on success, else a NULL pointer.
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*
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* NOTE:
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* While __vxfs_iget uses the pagecache vxfs_blkiget uses the
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* buffercache. This function should not be used outside the
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* read_super() method, otherwise the data may be incoherent.
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*/
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static struct inode *
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vxfs_get_fake_inode(struct super_block *sbp, struct vxfs_inode_info *vip)
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struct inode *
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vxfs_blkiget(struct super_block *sbp, u_long extent, ino_t ino)
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{
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struct inode *ip = NULL;
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struct buffer_head *bp;
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struct inode *inode;
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u_long block, offset;
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if ((ip = new_inode(sbp))) {
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ip->i_ino = get_next_ino();
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vxfs_iinit(ip, vip);
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ip->i_mapping->a_ops = &vxfs_aops;
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inode = new_inode(sbp);
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if (!inode)
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return NULL;
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inode->i_ino = get_next_ino();
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block = extent + ((ino * VXFS_ISIZE) / sbp->s_blocksize);
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offset = ((ino % (sbp->s_blocksize / VXFS_ISIZE)) * VXFS_ISIZE);
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bp = sb_bread(sbp, block);
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if (bp && buffer_mapped(bp)) {
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struct vxfs_inode_info *vip = VXFS_INO(inode);
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struct vxfs_dinode *dip;
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dip = (struct vxfs_dinode *)(bp->b_data + offset);
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dip2vip_cpy(VXFS_SBI(sbp), vip, dip);
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vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
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#ifdef DIAGNOSTIC
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vxfs_dumpi(vip, ino);
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#endif
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brelse(bp);
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return inode;
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}
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return (ip);
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printk(KERN_WARNING "vxfs: unable to read block %ld\n", block);
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brelse(bp);
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iput(inode);
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return NULL;
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}
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/**
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* __vxfs_iget - generic find inode facility
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* @ilistp: inode list
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* @vip: VxFS inode to fill in
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* @ino: inode number
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*
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* Description:
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* Search the for inode number @ino in the filesystem
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* described by @sbp. Use the specified inode table (@ilistp).
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* Returns the matching inode on success, else an error code.
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*/
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static int
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__vxfs_iget(struct inode *ilistp, struct vxfs_inode_info *vip, ino_t ino)
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{
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struct page *pp;
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u_long offset;
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offset = (ino % (PAGE_SIZE / VXFS_ISIZE)) * VXFS_ISIZE;
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pp = vxfs_get_page(ilistp->i_mapping, ino * VXFS_ISIZE / PAGE_SIZE);
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if (!IS_ERR(pp)) {
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struct vxfs_dinode *dip;
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caddr_t kaddr = (char *)page_address(pp);
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dip = (struct vxfs_dinode *)(kaddr + offset);
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dip2vip_cpy(VXFS_SBI(ilistp->i_sb), vip, dip);
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vip->vfs_inode.i_mapping->a_ops = &vxfs_aops;
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#ifdef DIAGNOSTIC
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vxfs_dumpi(vip, ino);
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#endif
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vxfs_put_page(pp);
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return 0;
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}
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printk(KERN_WARNING "vxfs: error on page 0x%p for inode %ld\n",
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pp, (unsigned long)ino);
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return PTR_ERR(pp);
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}
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/**
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* vxfs_stiget - find inode using the structural inode list
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* @sbp: VFS superblock
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* @ino: inode #
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*
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* Description:
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* Find inode @ino in the filesystem described by @sbp using
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* the structural inode list.
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* Returns the matching inode on success, else a NULL pointer.
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*/
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struct inode *
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vxfs_stiget(struct super_block *sbp, ino_t ino)
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{
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struct inode *inode;
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int error;
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inode = new_inode(sbp);
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if (!inode)
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return NULL;
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inode->i_ino = get_next_ino();
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error = __vxfs_iget(VXFS_SBI(sbp)->vsi_stilist, VXFS_INO(inode), ino);
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if (error) {
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iput(inode);
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return NULL;
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}
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return inode;
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}
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/**
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|
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@ -323,6 +279,7 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
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struct vxfs_inode_info *vip;
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const struct address_space_operations *aops;
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struct inode *ip;
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int error;
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ip = iget_locked(sbp, ino);
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if (!ip)
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|
|
@ -330,14 +287,13 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
|
|||
if (!(ip->i_state & I_NEW))
|
||||
return ip;
|
||||
|
||||
vip = __vxfs_iget(ino, VXFS_SBI(sbp)->vsi_ilist);
|
||||
if (IS_ERR(vip)) {
|
||||
vip = VXFS_INO(ip);
|
||||
error = __vxfs_iget(VXFS_SBI(sbp)->vsi_ilist, vip, ino);
|
||||
if (error) {
|
||||
iget_failed(ip);
|
||||
return ERR_CAST(vip);
|
||||
return ERR_PTR(error);
|
||||
}
|
||||
|
||||
vxfs_iinit(ip, vip);
|
||||
|
||||
if (VXFS_ISIMMED(vip))
|
||||
aops = &vxfs_immed_aops;
|
||||
else
|
||||
|
|
@ -368,12 +324,6 @@ vxfs_iget(struct super_block *sbp, ino_t ino)
|
|||
return ip;
|
||||
}
|
||||
|
||||
static void vxfs_i_callback(struct rcu_head *head)
|
||||
{
|
||||
struct inode *inode = container_of(head, struct inode, i_rcu);
|
||||
kmem_cache_free(vxfs_inode_cachep, inode->i_private);
|
||||
}
|
||||
|
||||
/**
|
||||
* vxfs_evict_inode - remove inode from main memory
|
||||
* @ip: inode to discard.
|
||||
|
|
@ -387,5 +337,4 @@ vxfs_evict_inode(struct inode *ip)
|
|||
{
|
||||
truncate_inode_pages_final(&ip->i_data);
|
||||
clear_inode(ip);
|
||||
call_rcu(&ip->i_rcu, vxfs_i_callback);
|
||||
}
|
||||
|
|
|
|||
|
|
@ -151,6 +151,8 @@ struct vxfs_dinode {
|
|||
* The inode as represented in the main memory.
|
||||
*/
|
||||
struct vxfs_inode_info {
|
||||
struct inode vfs_inode;
|
||||
|
||||
__u32 vii_mode;
|
||||
__u32 vii_nlink; /* Link count */
|
||||
__u32 vii_uid; /* UID */
|
||||
|
|
@ -183,4 +185,9 @@ struct vxfs_inode_info {
|
|||
#define vii_ext4 vii_org.ext4
|
||||
#define vii_typed vii_org.typed
|
||||
|
||||
static inline struct vxfs_inode_info *VXFS_INO(struct inode *inode)
|
||||
{
|
||||
return container_of(inode, struct vxfs_inode_info, vfs_inode);
|
||||
}
|
||||
|
||||
#endif /* _VXFS_INODE_H_ */
|
||||
|
|
|
|||
|
|
@ -52,6 +52,8 @@ MODULE_AUTHOR("Christoph Hellwig");
|
|||
MODULE_DESCRIPTION("Veritas Filesystem (VxFS) driver");
|
||||
MODULE_LICENSE("Dual BSD/GPL");
|
||||
|
||||
static struct kmem_cache *vxfs_inode_cachep;
|
||||
|
||||
/**
|
||||
* vxfs_put_super - free superblock resources
|
||||
* @sbp: VFS superblock.
|
||||
|
|
@ -117,7 +119,31 @@ static int vxfs_remount(struct super_block *sb, int *flags, char *data)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct inode *vxfs_alloc_inode(struct super_block *sb)
|
||||
{
|
||||
struct vxfs_inode_info *vi;
|
||||
|
||||
vi = kmem_cache_alloc(vxfs_inode_cachep, GFP_KERNEL);
|
||||
if (!vi)
|
||||
return NULL;
|
||||
return &vi->vfs_inode;
|
||||
}
|
||||
|
||||
static void vxfs_i_callback(struct rcu_head *head)
|
||||
{
|
||||
struct inode *inode = container_of(head, struct inode, i_rcu);
|
||||
|
||||
kmem_cache_free(vxfs_inode_cachep, VXFS_INO(inode));
|
||||
}
|
||||
|
||||
static void vxfs_destroy_inode(struct inode *inode)
|
||||
{
|
||||
call_rcu(&inode->i_rcu, vxfs_i_callback);
|
||||
}
|
||||
|
||||
static const struct super_operations vxfs_super_ops = {
|
||||
.alloc_inode = vxfs_alloc_inode,
|
||||
.destroy_inode = vxfs_destroy_inode,
|
||||
.evict_inode = vxfs_evict_inode,
|
||||
.put_super = vxfs_put_super,
|
||||
.statfs = vxfs_statfs,
|
||||
|
|
@ -206,6 +232,7 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
|
|||
goto out;
|
||||
}
|
||||
|
||||
sbp->s_op = &vxfs_super_ops;
|
||||
sbp->s_fs_info = infp;
|
||||
|
||||
if (!vxfs_try_sb_magic(sbp, silent, 1,
|
||||
|
|
@ -256,7 +283,6 @@ static int vxfs_fill_super(struct super_block *sbp, void *dp, int silent)
|
|||
goto out;
|
||||
}
|
||||
|
||||
sbp->s_op = &vxfs_super_ops;
|
||||
root = vxfs_iget(sbp, VXFS_ROOT_INO);
|
||||
if (IS_ERR(root)) {
|
||||
ret = PTR_ERR(root);
|
||||
|
|
|
|||
Loading…
Reference in New Issue