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Commit 132ac7b7 authored by Jeff Layton's avatar Jeff Layton Committed by Steve French
Browse files

cifs: refactor new_inode() calls and inode initialization 



Move new inode creation into a separate routine and refactor the
callers to take advantage of it.

Signed-off-by: default avatarJeff Layton <jlayton@redhat.com>
Signed-off-by: default avatarSteve French <sfrench@us.ibm.com>
parent e4cce94c

fs/cifs/cifsproto.h

+2 −0
Original line number Diff line number Diff line
@@ -92,6 +92,8 @@ extern u64 cifs_UnixTimeToNT(struct timespec); 
extern __le64 cnvrtDosCifsTm(__u16 date, __u16 time);

extern struct timespec cnvrtDosUnixTm(__u16 date, __u16 time);



extern struct inode *cifs_new_inode(struct super_block *sb,

				    unsigned long *inum);

extern int cifs_get_inode_info(struct inode **pinode,

			const unsigned char *search_path,

			FILE_ALL_INFO *pfile_info,

fs/cifs/inode.c

+60 −36
Original line number Diff line number Diff line
@@ -199,6 +199,49 @@ static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat, 
	pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);

}



/**

 * cifs_new inode - create new inode, initialize, and hash it

 * @sb - pointer to superblock

 * @inum - if valid pointer and serverino is enabled, replace i_ino with val

 *

 * Create a new inode, initialize it for CIFS and hash it. Returns the new

 * inode or NULL if one couldn't be allocated.

 *

 * If the share isn't mounted with "serverino" or inum is a NULL pointer then

 * we'll just use the inode number assigned by new_inode(). Note that this can

 * mean i_ino collisions since the i_ino assigned by new_inode is not

 * guaranteed to be unique.

 */

struct inode *

cifs_new_inode(struct super_block *sb, unsigned long *inum)

{

	struct inode *inode;



	inode = new_inode(sb);

	if (inode == NULL)

		return NULL;



	/*

	 * BB: Is i_ino == 0 legal? Here, we assume that it is. If it isn't we

	 *     stop passing inum as ptr. Are there sanity checks we can use to

	 *     ensure that the server is really filling in that field? Also,

	 *     if serverino is disabled, perhaps we should be using iunique()?

	 */

	if (inum && (CIFS_SB(sb)->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))

		inode->i_ino = *inum;



	/*

	 * must set this here instead of cifs_alloc_inode since VFS will

	 * clobber i_flags

	 */

	if (sb->s_flags & MS_NOATIME)

		inode->i_flags |= S_NOATIME | S_NOCMTIME;



	insert_inode_hash(inode);



	return inode;

}



int cifs_get_inode_info_unix(struct inode **pinode,

	const unsigned char *full_path, struct super_block *sb, int xid)

{
@@ -233,22 +276,12 @@ int cifs_get_inode_info_unix(struct inode **pinode, 


	/* get new inode */

	if (*pinode == NULL) {

		*pinode = new_inode(sb);

		*pinode = cifs_new_inode(sb, (unsigned long *)

						&find_data.UniqueId);

		if (*pinode == NULL) {

			rc = -ENOMEM;

			goto cgiiu_exit;

		}

		/* Is an i_ino of zero legal? */

		/* note ino incremented to unique num in new_inode */

		/* Are there sanity checks we can use to ensure that

		   the server is really filling in that field? */

		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)

			(*pinode)->i_ino = (unsigned long)find_data.UniqueId;



		if (sb->s_flags & MS_NOATIME)

			(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;



		insert_inode_hash(*pinode);

	}



	inode = *pinode;
@@ -465,11 +498,8 @@ int cifs_get_inode_info(struct inode **pinode, 


	/* get new inode */

	if (*pinode == NULL) {

		*pinode = new_inode(sb);

		if (*pinode == NULL) {

			rc = -ENOMEM;

			goto cgii_exit;

		}

		__u64 inode_num;



		/* Is an i_ino of zero legal? Can we use that to check

		   if the server supports returning inode numbers?  Are

		   there other sanity checks we can use to ensure that
@@ -486,7 +516,6 @@ int cifs_get_inode_info(struct inode **pinode, 


		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {

			int rc1 = 0;

			__u64 inode_num;



			rc1 = CIFSGetSrvInodeNumber(xid, pTcon,

					full_path, &inode_num,
@@ -496,12 +525,17 @@ int cifs_get_inode_info(struct inode **pinode, 
			if (rc1) {

				cFYI(1, ("GetSrvInodeNum rc %d", rc1));

				/* BB EOPNOSUPP disable SERVER_INUM? */

			} else /* do we need cast or hash to ino? */

				(*pinode)->i_ino = inode_num;

		} /* else ino incremented to unique num in new_inode*/

		if (sb->s_flags & MS_NOATIME)

			(*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;

		insert_inode_hash(*pinode);

			}

			*pinode = cifs_new_inode(sb, (unsigned long *)

							&inode_num);

		} else {

			*pinode = cifs_new_inode(sb, NULL);

		}



		if (*pinode == NULL) {

			rc = -ENOMEM;

			goto cgii_exit;

		}

	}

	inode = *pinode;

	cifsInfo = CIFS_I(inode);
@@ -1114,24 +1148,14 @@ int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) 
			else

				direntry->d_op = &cifs_dentry_ops;



			newinode = new_inode(inode->i_sb);

			newinode = cifs_new_inode(inode->i_sb, (unsigned long *)

							&pInfo->UniqueId);

			if (newinode == NULL) {

				kfree(pInfo);

				goto mkdir_get_info;

			}



			/* Is an i_ino of zero legal? */

			/* Are there sanity checks we can use to ensure that

			   the server is really filling in that field? */

			if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {

				newinode->i_ino =

					(unsigned long)pInfo->UniqueId;

			} /* note ino incremented to unique num in new_inode */

			if (inode->i_sb->s_flags & MS_NOATIME)

				newinode->i_flags |= S_NOATIME | S_NOCMTIME;

			newinode->i_nlink = 2;



			insert_inode_hash(newinode);

			d_instantiate(direntry, newinode);



			/* we already checked in POSIXCreate whether

fs/cifs/readdir.c

+24 −30
Original line number Diff line number Diff line
@@ -56,35 +56,34 @@ static inline void dump_cifs_file_struct(struct file *file, char *label) 
}

#endif /* DEBUG2 */



/* Returns one if new inode created (which therefore needs to be hashed) */

/* Returns 1 if new inode created, 2 if both dentry and inode were */

/* Might check in the future if inode number changed so we can rehash inode */

static int construct_dentry(struct qstr *qstring, struct file *file,

	struct inode **ptmp_inode, struct dentry **pnew_dentry)

static int

construct_dentry(struct qstr *qstring, struct file *file,

		 struct inode **ptmp_inode, struct dentry **pnew_dentry,

		 unsigned long *inum)

{

	struct dentry *tmp_dentry;

	struct cifs_sb_info *cifs_sb;

	struct cifsTconInfo *pTcon;

	struct dentry *tmp_dentry = NULL;

	struct super_block *sb = file->f_path.dentry->d_sb;

	int rc = 0;



	cFYI(1, ("For %s", qstring->name));

	cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);

	pTcon = cifs_sb->tcon;



	qstring->hash = full_name_hash(qstring->name, qstring->len);

	tmp_dentry = d_lookup(file->f_path.dentry, qstring);

	if (tmp_dentry) {

		/* BB: overwrite old name? i.e. tmp_dentry->d_name and

		 * tmp_dentry->d_name.len??

		 */

		cFYI(0, ("existing dentry with inode 0x%p",

			 tmp_dentry->d_inode));

		*ptmp_inode = tmp_dentry->d_inode;

/* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/

		if (*ptmp_inode == NULL) {

			*ptmp_inode = new_inode(file->f_path.dentry->d_sb);

			*ptmp_inode = cifs_new_inode(sb, inum);

			if (*ptmp_inode == NULL)

				return rc;

			rc = 1;

		}

		if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)

			(*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;

	} else {

		tmp_dentry = d_alloc(file->f_path.dentry, qstring);

		if (tmp_dentry == NULL) {
@@ -93,15 +92,14 @@ static int construct_dentry(struct qstr *qstring, struct file *file, 
			return rc;

		}



		*ptmp_inode = new_inode(file->f_path.dentry->d_sb);

		if (pTcon->nocase)

		if (CIFS_SB(sb)->tcon->nocase)

			tmp_dentry->d_op = &cifs_ci_dentry_ops;

		else

			tmp_dentry->d_op = &cifs_dentry_ops;



		*ptmp_inode = cifs_new_inode(sb, inum);

		if (*ptmp_inode == NULL)

			return rc;

		if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)

			(*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;

		rc = 2;

	}
@@ -842,8 +840,6 @@ static int cifs_get_name_from_search_buf(struct qstr *pqst, 
			len = strnlen(filename, PATH_MAX);

		}



		/* BB fixme - hash low and high 32 bits if not 64 bit arch BB */

		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)

		*pinum = pFindData->UniqueId;

	} else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {

		FILE_DIRECTORY_INFO *pFindData =
@@ -940,20 +936,18 @@ static int cifs_filldir(char *pfindEntry, struct file *file, 
	if (rc)

		return rc;



	rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry);

	/* only these two infolevels return valid inode numbers */

	if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX ||

	    pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO)

		rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,

					&inum);

	else

		rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,

					NULL);



	if ((tmp_inode == NULL) || (tmp_dentry == NULL))

		return -ENOMEM;



	if (rc) {

		/* inode created, we need to hash it with right inode number */

		if (inum != 0) {

			/* BB fixme - hash the 2 32 quantities bits together if

			 *  necessary BB */

			tmp_inode->i_ino = inum;

		}

		insert_inode_hash(tmp_inode);

	}



	/* we pass in rc below, indicating whether it is a new inode,

	   so we can figure out whether to invalidate the inode cached

	   data if the file has changed */